The main role is to lubricate and protect the gear, gear oil and other lubricating oils are still very different, gear oil is mainly synthetic or mineral oil additives added to the base oil production, gear oil is not only wear-resistant, but also load-resistant performance and there is a suitable viscosity These unique advantages make gear oil better able to be applied. Many gears are found to be worn or rusted during overhaul, but gear oil has good rust resistance.
Nippon Oil Emulsified oil has two effects.
The most distinctive advantages are energy saving and pollution reduction, especially pollution reduction. Now environmental pollution is very serious. If we do not use some emulsified oil with less environmental pollution, the cost of environmental pollution control will be much higher than the cost of using emulsified oil. Emulsified oil is energy-saving oil, can also be called green oil, the future development of emulsified oil is also very advantageous, as a new type of clean energy, regardless of policy, or society, has been widely recognized. Some friends do not know enough about emulsified oil, see the color of the emulsified oil mixed with water is white, feel like lubricating oil, think emulsified oil is not good, this concept is very wrong. We must accept some new things correctly. We must not blindly understand them. We must understand everything objectively and impartially.
Nippon Oil antirust oil
Most of the products in industrial production are made of metal. Antirust has become a concern of various enterprises. The new Japanese petroleum antirust oil is suitable for different periods of antirust of equipment, precision parts, electroplating parts, hardware, cutting tools, molds, mechanical parts and various metal products.
Before applying rust-proof oil, the surface should be clean and dry, and the surface of the workpiece should not contain chloride or acid residue; if the workpiece after pickling needs long-term rust prevention, please ensure that the water is washed clean, thoroughly neutralize, passivate and dry, and the oil can be applied after no rust; the oil should be uniform to ensure the thickness and uniformity of the oil film. The anticorrosion time and salt fog resistance time promised by the manufacturer are all empirical data for reference only, which need to be adjusted according to the climatic conditions, material types, surface conditions and other factors. In addition, rust proof oil should also be kept clean and kept away from open fire, strictly prohibited from contacting with water and strictly prohibited from eating.
New Japan oil worm gear oil
The scope of application is particularly wide, but the use of worm gear and worm oil should also pay attention to, because the worm gear and worm oil operation requires to try to avoid local overheating and oil temperature to 100 degrees when the continuous operation, both of these conditions will cause a larger Shanghai, will greatly reduce the life of the machine. Life. Worm gear and worm oil has a very good anti-friction ability, can protect the machine from vibration caused by friction loss, lubrication is also very good, for the corrosion of the machine to play an impediment role. Worm gear and worm oil although a wide range of applications, but also to pay attention to storage, must be placed in a ventilated and dry place, while avoiding direct sunlight exposure. When not in use, be sure to be in a sealed state.
Gear oil and emulsified oil
What materials can be stirred by vertical shaft planetary mixers
Vertical axis planetary mixer, is a kind of vertical planetary mixer for chemical machinery, is now widely used, the function is also appropriate strong. Principle: When the planetary rack rolls, it drives the three mixing shafts in the box to revolve around the barrel together, and the mixing shaft rotates at a high speed, so that the material is subjected to intense shearing and kneading effect, so as to achieve the intent of abundant dispersion and mixing. On the planetary rack, there is a scraper rolling with the planetary rack, constantly scraping the barrel wall, so that the barrel wall does not stop. Material, progressive mixing effect. If you want to consult, can go to the Jin Po Tai machine to see, expect to help you ask: Yes, the principle is so, good, I will go to see, thank you. Concrete mixer is a machine for mixing concrete, aggregate and water into concrete mixture. It is mainly composed of mixing drum, feeding and unloading organization, water supply system, prime mover, transmission organization, frame and supporting equipment. Self-falling mixer has a long history, as early as in the early 20th century, the steam engine driven drum concrete mixer has begun to appear. After the 1950s, the double cone mixer with reversed discharging and tilting discharging and the cracked cylinder mixer were developed one after another. There is a radial mixing blade on the inner wall of the mixing drum of the self falling concrete mixer. During operation, the mixing cylinder is reversed around its horizontal axis, and the material in the mixing cylinder is lifted to a certain height by the blade, and then falls by the dead weight, so that the circular movement can reach the uniform mixing effect. The self falling concrete mixer is simple in structure, mainly in mixing plastic concrete. Forced mixer has sprung up and implemented since the beginning of 1950s. The first is the disc vertical shaft forced concrete mixer. This mixer is divided into two types: turboprop type and planetary type. After the 1970s, with the use of lightweight aggregate, a circular groove horizontal shaft type forced mixer, it is divided into two types of single horizontal axis and double horizontal axis, both self-falling and forced mixing characteristics. Its mixing blade has small linear speed, good abrasion resistance and less energy consumption, and develops quickly. A mixing blade is arranged on the rotating shaft arm of the mixing barrel of the compulsory concrete mixer, and the materials in the mixing barrel are joined to form the interlaced logistics under the strong agitation of the mixing blade. This mixing method is far more intense than the self mixing method, and is primarily suitable for mixing hard concrete. Connected concrete mixer is equipped with spiral mixing blades. All kinds of data are weighed according to the cooperation ratio and then put into the mixer. Mixed concrete is discharged from the discharging end. This mixing machine has short mixing time and high productivity, and its development is obvious to all. With the development of concrete data and construction technology, many new types of concrete mixers have emerged, such as steam heated mixer, supercritical speed mixer, acoustic mixer, non-mixing blade swaying disc mixer and secondary mixer. Protection and maintenance 1 maintenance of body cleaning, remove dirt and obstacles on the body. 2 check the oil and circuit and control equipment at the smooth places and fill the smooth oil as required. 3 Before each shift, add water to the mixing tank and idle for 1 – 2 minutes to check the reliability of the clutch and brake equipment. During the operation of concrete mixer, the noise of motor, reducer and transmission gear should be inspected at any time, and the temperature rise should be too high. 5 After each operation, the concrete mixer should be cleaned carefully. Operation rules 1, empty car trial operation before mixing. 2, adjust the time relay according to mixing time, pay attention to the adjustment under power failure. 3. Water humid mixing cylinders and blades and places. 4. The process such as electrical or mechanical failure should be unloaded part of the mixture, reduce the load, troubleshooting and then start operation. 5, when using the operation, we should check regularly to avoid accidents such as electric shock and mechanical injury. 6. After the experiment, close the power supply, arrange the mixing drum and the place, and clean up.
How is the working process and efficiency of hydraulic fracturing machine
The splitter consists of a hydraulic power station, a transport rack, one or more splitting guns, a set of high-pressure hydraulic connecting pipes and a quick joint.
Product Description:
I. preparation work
The splitter uses high pressure tubing to connect the hydraulic station with the splitting gun, and checks the oil level of the oil station and the lubrication condition of the splitting wedge of the splitting gun head.
First look at the composition of the splitter: a hydraulic power station, a transport rack, one or more splitting guns, a set of high-pressure hydraulic connection pipe and fast joint composition.
Two. Drill holes
A round hole with a diameter of 42 mm/depth of 500 mm is drilled on the surface of rock or concrete to be split by electric drill or pneumatic drill, and the residue in the hole is cleaned up. In some cases, the diameter and depth of holes have special requirements.
Three. Split
Put the splitting wedge into the hole, start the hydraulic station, turn on the hydraulic switch valve, and finish the splitting process in about 60 seconds.
Four. Take a gun
After the splitting is completed, the hydraulic switch valve is pulled back to gear, the gun head is withdrawn in about 20 seconds, and the splitting gun is pulled out.
Energy consumption of splitting machine
Hydraulic station power is 1.5-4 kW, split time is related to the number of split guns deployed, the average is about 60 seconds.
Cleavage efficiency:
The time of drilling is 10 minutes, and the average time of splitting is 30-40 seconds.
An operator’s set of splitters splits 1 cubic metre/5 minutes, 8 hours a day and can split about 100 cubic stones or concrete.
Under the condition of non blasting, the shaft must be excavated according to your punching and discharging conditions.
Friends who have not touched the cleavage machine should not know how heavy the small and medium-sized splitting machine is. So let me tell you, Jiangxi Kaiao small and medium-sized splitter with a split gun 150 kg, with two split guns 180 kg, with three split guns is 200 kg, cumulative calculation in turn. The splitter is made up of hydraulic pump, high pressure tubing and splitting gun. The Jiangxi Kaiao splitter is made up of imported hydraulic pumps, which have great strength, super pressure, stable performance and durable wear resistance. The high-end brand accessories are made of tough and tough, and no stone can break up.
Technology application of reducer
Electric machinery
Characteristic
As a relatively independent part of this product series, there are five varieties and ten series for users to choose. According to varieties: standard motor, speed motor, electromagnetic brake motor, speed electromagnetic brake motor, DC motor. According to the power points: 6W, 15W, 25W, 40W, 60W, 90W, 120W, 140W, 200W, 300W. According to the voltage used, single-phase 110V/220V and three-phase 220V/380V. The motor has independent terminal box to facilitate electrical connection. Because the product line is precision small power machinery, its appearance is exquisite and its size is exquisite. It is strictly forbidden to knock excessively during assembling and using in order to prevent the damage of internal structure. At the same time, attention should be paid to the axial and radial loads of the output shaft in the selection process. In order to ensure the service life, please select the type carefully and use it rationally.
install
For an independent motor with a circular output shaft, the tolerances of the mounting joint holes of the shaft end parts are 6H7, 8H7, 10H7 and 12H7, respectively, depending on the type. In addition to the design structure, the recommended flexible coupling should be used. It is recommended to use the right angle installation feet of the corresponding specifications when the end face is difficult to install. In addition, when installing the motor with cooling fan, it is advised not to plug the suction outlet at the rear of the motor and to leave no less than 10 mm of space.
Combination of standard gearbox and motor
Characteristic
The motor can be precisely positioned by the end face positioning ring and the standard reducer, which can provide a combination of 1/3~1/200 standard deceleration ratio. For example: speed regulation, electromagnetic brake and other forms.
install
Standard decelerator and motor are precision machinery. The installation process after design and selection is one of the factors that determine the service life.
Connection between motor and standard gearbox
As the assembly of precision machinery, the motor matched with the gearbox has flange port on its connection end. The end face of the gearbox is fitted with the countersink mouth. Users can adjust the gearbox and motor assembly phase according to their own actual situation, that is, can rotate the motor or gearbox according to the illustration. After adjusting to the ideal position, four screws on the fastening flange of the motor. Pay attention to the order of fastening screws, through the diagonal gradually tightening, can make the motor and reducer body close.
Connection with equipment
The connecting surface of the output shaft end of the reducer is a plane, and the connecting hole on it is a threaded hole. The surface is a finely machined plane, which can be directly connected with the machined connecting surface of the equipment. Attention should be given to tightening the way in which the diagonal angle should be gradually tightened. Or the equipment connection is limited, or the design structure difference, recommends the use of special configuration of the right angle installation foot for installation, so that more reliable connection, convenient speed regulation, but also with this matching high-precision flexible coupling for choice.
Similarly, when installing a motor with a cooling fan, be careful not to plug the suction outlet at the rear of the motor. It is recommended that no less than 10 mm of space be left.
The motor, reducer and intermediate reducer of this product series are all tightly geared components, which should be paid special attention when connecting with the load. Strong knocking and wrenching are strictly prohibited. In order to facilitate assembly in the product design career has taken into account such issues, the following is the keyway width of 4mm when the size, shaft diameter tolerance level is h7.
Combination of right angle reducer and motor
Characteristic
Unlike traditional standard gearboxes (or parallel axle gearboxes), in order to provide designers with more choice space, so that the overall equipment is more compact, the company also provides a right angle gearbox transmission form. In addition to all the functions of the standard reducer, the right-angle reducer has a wide range of speed ratio selectivity (i = 3 ~ 600), excellent transmission performance, high strength housing, and compact installation, which is beyond the standard reducer.
Similarly, under the aforementioned conditions, different functional combinations can be realized by selecting different functions of the motor.
For example: speed regulation, electromagnetic brake, reversible and so on.
Installation space comparison
Combination with right angle mounting feet
With intermediate gear box
Installation reserve space
No less than 10mm
install
The right angle reducer, intermediate gear box and motor are compact machine guns. The assembly quality after design and selection will directly affect its service life and performance.
Connection between motor and right angle reducer
As the assembling of the compact machine, the motor matched with the right-angle reducer has a flange stop on its connecting end surface besides an independent connecting terminal box. The end face of the right angle reducer is fitted with the countersink port. The user can rotate the relative rotation of the motor and the right angle reduction gear according to the actual situation. After adjustment, four screws are attached to the connecting flange from the firm motor.
Pay attention to the order of fastening screws: gradually tighten diagonally.
Connection with equipment
The end face of the output shaft of the right-angle reducer is a finish machining plane with four through holes distributed on its four corners, which can be directly connected with the machined connection surface of the equipment. The output mode of the right-angle reducer can be divided into two types: the solid shaft and the hollow shaft. Users can choose according to the form of the load, and the bolts should also be fastened. The way of diagonal gradually tightening.
Connection of solid shaft output in right angle reducer
The real shaft output of the right-angle reducer is keyway structure, corresponding to different specifications, and the dimensions of the assembly holes of its output shaft are respectively 12H7, 15H7, 20H7. In connection with load
Field repair of shaft wear of high speed multi stage centrifugal fan
Abstract] This paper introduces a on-site repair process for bearing wear of Spencer high-speed multi-stage centrifugal fan with rotating speed of 2900 r/min, and analyzes the causes of fan wear, and puts forward a process for on-site repair using Fujitsu Blue < polymer composite materials with special tooling, which will last after repair. The tracking effect is good.
[Key words] fan shaft wear; fan; bearing bit wear; Shi bin Sha
1, equipment introduction
The multi-stage centrifugal fan is a multi-stage, single-suction, double-support structure composed of rotor, casing, air inlet, air outlet, bearing seat, sealing group, muffler, motor, control system, etc. (see Fig. 1); the motor and blower are mounted on the base and pass between them.
2. Field repair of multi stage centrifugal fan shaft wear
2.1 wear condition of multistage centrifugal fan shaft
The vibration value of an imported Spencer multistage centrifugal fan in a chemical enterprise was too large and the rotating speed was 2900 r/min. After disassembly, the shaft wear problem was found on the thrust side of the fan. The wear location was the installation surface of angular contact bearing and ball bearing, the wear amount was about 0.25 mm on one side, and the shaft diameter was about 65mm. The number is: 7313WN/T313KS; deep groove ball bearing is 7313WN/P313KS.
2.2 equipment problem analysis
There are many reasons for shaft wear, but the most important reason is the metal characteristics used to manufacture shaft, although the metal hardness is high, but poor concession (after deformation can not be restored), poor impact resistance, poor fatigue resistance, so easy to cause adhesion wear, abrasive wear, fatigue wear, fretting Wear, most of the shaft wear problems are not easy to detect, only in the case of high temperature, jumping amplitude, abnormal sound, most of the shaft has been worn seriously, resulting in machine shutdown.
2.3 field repair technology for wear of multi stage centrifugal fan shaft
2.3.1 The traditional way to deal with the wear of shafts and inner holes is to transport the shafts to the machine repair plant for repairing and welding. The repairing welding machine itself is easy to cause local thermal stress on the surface of the shafts, resulting in the hidden danger of shaft breakage. The demolition, transportation and installation of the utility model have a long repair time and high comprehensive repair cost.
2.3.2 Fuxing blue polymer composite repair process. In order to improve the repairing precision, the repairing die was redesigned to ensure the repairing effect and precision, and the repairing precision was guaranteed to the maximum extent.
2.4 field repair of shaft wear of multistage centrifugal fan
2.4.1 Surface treatment: Firstly, the abrasion position is baked to remove the grease infiltrated into the metal micropores.
2.4.2 pitting: 4-6 pitting on the circumference of the shaft to increase the adhesive force of the material.
2.4.3 grinding: use sandpaper to grind the worn position and clean it with alcohol or acetone.
2.4.4 Hollow test mold: assemble the mold to the repairing part, observe the clamping condition of the mold, and then brush and paint the stripping agent after disassembly.
2.4.4 blend material: mix 2211F material proportionally and stir until no color difference.
2.4.5 coating material: 2211F material is used to fill the worn position and slightly larger than the amount of wear.
2.4.5 assemble the mold and wait for the material to solidify.
After the 2.4.5 material is solidified, the mold is removed and the material is applied again to assemble the bearing.
2.5 field repair of shaft wear of multistage centrifugal fan
Solutions for common failures of tapping machines
Tapping machine is a kind of machine tool that uses taps to process internal threads. It is the most widely used machine tool for processing internal threads. Because the tapping machine taps work in different working conditions, some taps wear and tear first to increase the torque and break occasionally, resulting in the scrap processing of the workpiece to stop. Sometimes even those workpieces have been processed for a long time in the various processes of machining or even finishing, due to tapping process tap breakage and lead to a large number of waste workpiece scrap. The following is a brief introduction to the solutions for common failures of tapping machines.
(1) Because the cutting edge of the tap is blunted by wear, the tapping torque increases continuously to a certain extent, and if the tap is not withdrawn in time, the tap will break.
(2) In the process of tapping, the additional tapping torque of the scrap plugging tap increases sharply. If the scrap can not be further discharged without reversing the tap, the tap will break because of the excessive torque.
(3) Hard particles appear in the uneven hardness part of the workpiece material. If the tapping torque exceeds a certain value when the tap meets, the tap must be reversed and withdrawn or the tap will break. Under normal circumstances, the tap can break through this part of the material and continue to tap.
(4) tapping can not meet the technological requirements. Using non-special oils such as machine oil and vegetable oil as cutting oil, the processed products are prone to burr and other adverse conditions, and the tap life will be greatly reduced.
(5) the speed of feeding is too fast to cause too much torque. It is suggested that the speed of tapping machine should not be too fast when machining threads with ordinary taps.
(6) the bottom hole diameter does not match the tap. When tapping, the necessary parts of the tap need to be increased, thus breaking the tap. It is suggested that the correct bottom hole diameter should be selected according to the type of tap and the material of the tap. If there is no fully conformable bit, the larger one can be selected.
(7) improper operation. When the tap is about to touch the bottom of the hole, it still feeds at the tapping speed before it reaches the bottom of the hole, or forcibly feeds when the chip is not well discharged, resulting in the tap breaking.
(8) concentricity is not enough. At the beginning of tapping, the starting position of the tap is incorrect, that is, the axis of the tap is not aligned with the center line of the bottom hole, and the torque is too large during tapping, which is the main reason for the tap breaking.
(9) improper steps of tapping. When tapping high hardness parts or deep holes, step tapping should be done to avoid one stroke.
Above is the solution of common faults of tapping machine. Under the condition of ensuring product process, product material and processing equipment, the key to ensure product quality is the positioning of workpiece, the control of tapping speed and the method of operation flow. Yida Borun Petrochemical Company is the largest manufacturer of high-end metal processing oil in China. The tapping oil series developed independently is made of lard sulfide and fatty acid sulfide ester as the main agent. It has excellent extreme pressure and anti-wear properties. It can effectively protect taps, improve surface finish of workpieces and greatly improve processing efficiency. In practice, customers at home and abroad have won favorable comments.
What is the working principle of the oil pump on the cutting machine
Hydraulic oil pump is the power source of the hydraulic system, we choose the hydraulic oil pump to meet the pressure and flow requirements of the hydraulic system, but also to take full account of reliability, life, maintainability and so on in order to select the hydraulic oil pump in the hydraulic system for long-term operation. There are many kinds of hydraulic pumps and their characteristics are quite different. Hydraulic oil pumps include vane pumps, gear pumps, plunger pumps and screw pumps. Generally used in the market are vane pumps, gear pumps and plunger pumps. And vane pump can be divided into variable vane pump, variable heat dissipation vane pump, variable vane pump with cooling pump and quantitative vane pump.
Matters needing attention in fan operation
1. sound and explosion proof blower
It is difficult to judge the cause of the abnormal noise when the fan is in operation quickly and correctly, and it must be fully investigated. The common causes are as follows: the intake pipe sucks solid impurities; the stator and rotor of the fan are locked; the bearing is abnormal. At this point, often accompanied by vibration in abnormal noise. At the same time, the abnormal noise produced in prime mover and mandatory fuel supply should also be noted.
2. check vibration
Similar to the abnormal sound, it is difficult to judge the cause of the violent vibration of the fan directly, and it is necessary to pay close attention to it and check it adequately. There are many types of vibration: mechanical vibration of fluid caused by surge; vibration caused by poor alignment of fan and prime mover; unreasonable installation of fan and abnormal quiet condition of bearing; vibration intensified by long-term operation of impeller; mechanical vibration caused by contact between rotor and stator clearance. The judgement of the vibration state of bearing parts is shown in JB/T 8689-1998.
3. bearing inspection
The temperature side of the bearing is most important for understanding the working condition of the bearing. It is generally stipulated that the temperature rise of the bearing should not be higher than the ambient depression of 4090. In addition, attention should also be paid to the amount of lubricating oil and its contamination, whether oil leakage, oil temperature and oil pressure in different situations. For cooling fans that use cooling water, we should also pay attention to the water and water of cooling water. For fans with oil ring bearings, it should also confirm whether the oil ring work is normal.
4. inspection of shaft seal part
Always check the leakage condition of the shaft seal, the gap or contact between the static part and the shaft, whether there is contact at one end, heating, abnormal vibration, abnormal sound and so on.
5. prosecutors in other parts
Pay attention to outflow pressure, intake pressure, air volume, current and so on. Discover abnormal situations in time and prevent them from happening.
The working principle of the slitter
1. constant tension control principle
The essence of constant tension control in winding and unwinding process is to know the change of winding diameter when the load is running. Because of the change of winding diameter, in order to maintain the operation of the load, the output torque of the splitter motor needs to change with the change of winding diameter. For the V series inverter, because it can control the torque, it can control the constant tension of the winding. The V series inverters provide three analog input ports, AUI, AVI and ACI. The three-way analog input can be defined as a variety of functions, so one can be chosen as a given torque, and the other as a speed limit. 0-10V outputs rated torque of 0-motor to the inverter, so the constant tension can be controlled by adjusting the voltage of 0-10v. And Duyu slitting machine, the calculation of the coil diameter part is calculated by the tension controller, of course, the use of PLC architecture to achieve is also no problem. That is to say, the tension can be set on the man-machine or text, through the PLC calculation of coil diameter, T = F * D / 2, so you can calculate the need for motor output torque, through the analog output to the V series inverter torque given end can be.
2. synchronous speed calculation
Because we know that the frequency converter works at low frequency, the slitter AC asynchronous motor has poor characteristics, low activation torque and linearity, so in the whole process of winding, we should try to avoid the winding motor working below 2HZ. Therefore, the winding motor has a minimum speed limit. For the four-stage motor, the synchronous speed is calculated as follows: N1 = 30f1 / P = N1 = 1500r / min = 2HZ / 50HZ = N / 1500 = N = 60rpm / min
(F1 is rated frequency, P is polar logarithm, N1 is synchronous speed).
3. speed limit operation
When the maximum coil diameter is reached, the lowest speed can be obtained in the whole process.
V= PI *D*n/i=Vmin=3.14*1.2*60/9=25.12m/min
Tension control, the slitter to speed limits, otherwise there will be flying, so speed limit operation.
4. calculation of tension and torque
If F*D/2 = T/i (F-tension, D-coil diameter, T-torque, i-deceleration ratio), = F = 2*T*i/D for a 3.7KW AC motor, the rated torque is calculated as follows: T = 9550*P/n = T = 24.88N.m So Fmax = 2*24.88*9/0.6 = 74.64N (T-motor rated torque, P-motor rated power, n = motor rated speed)
Application of mold monitor in injection molding
In the production, because the thimble, slider is not in place or the product is not completely demoulded, resulting in the pressing mold situation repeatedly prohibited, so that the technical personnel engaged in the field headache; because of the frequent appearance of the pressing mold, so the mold maintenance and repair costs are high, reducing the cost of repair mold is one of the most important ways to control production costs considered by the boss; Due to the delay of the project due to die pressing and repairing, so that sales staff worry about not delivering on time, affecting customer scheduling; the quality of the mold, in fact, affects whether the work of various departments can be completed on time according to quality.
In the mold and related accessories industry small program, mold protector (mold monitor) can be detected from the following aspects of the mold, once detected in one of the following cases, immediately alarm shutdown, prevent die pressing
1. Check whether there are residues in mold cavity, mold core and product before closing.
2, the location of the slider, the return of the thimble, and whether the inserts are in place are tested.
3, whether plug-in insertion is correctly detected.
4. Whether the thimble is broken or not is tested.
5, whether the product is defective or burr for testing.
6, whether the product is completely demoulding for testing.
7, products with high precision require testing whether the product size is qualified.
8, whether multi hole products are missing for testing.
9, whether the color mix of polychromatic products is correctly detected.
10. Prevent the continuous appearance of defective products: you can set how many bad products to stop (injection molding) processing.
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