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Hydraulic pump maintenance common problems and repair before the preparation work
Hydraulic pump maintenance often encountered problems:
Leakage of hydraulic oil pump and hydraulic transmission system
1. Classification of leaks
Leaks are classified as leaks and external leaks. According to the level of leakage, there are several forms of oil slick scraping leakage, leakage, leakage and leakage. Oil slick scraping leakage occurs in the middle of the relative speed position, such as the drag pair of the rotating body, repeated movement (such as the hydraulic cylinder of the hydraulic cylinder, the valve core of the manual hydraulic directional valve extension position, etc.); Water leakage occurs in the bearing end cover valve body close connection; Leakage occurs in the tee joint and other places; Spray leakage is more produced in water pipe crack less sealing and so on. Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers
Hydraulic pump maintenance
2. Damage of oil seepage
Exposure leads to air pollution in the work to damage the environment, internal leakage leads to temperature, high efficiency reduction, pressure can not be raised in the work, the system software is weak, fitness exercise speed slow down and other common faults. Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers
3. The cause of oil seepage
(1) The quality of hydraulic seals is not good, the assembly line is damaged, the application time is long, the embrittlement and mildew, and the material in the work is mutually exclusive and other sources cause the ineffective sealing; Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers
(2) the relative speed pair damage to expand the mutual coordination gap, internal leakage expansion, or mutual coordination surface contusion caused by internal and external leakage; Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers
(3) The oil temperature is too high;
(4) The working pressure of system software application is too high;
(5) The sealing position specification design scheme is wrong, the production and processing precision is not good, the assembly line is not good, resulting in internal and external leakage. Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers
Can find out the cause of internal and external leakage of basically symptomatic treatment to adopt solutions.
Two: the working pressure of the hydraulic transmission system is disorder, and the working pressure can not be raised or lowered
Working pressure is one of the two most basic main parameters of the hydraulic transmission system, which determines the performance of the hydraulic transmission system on a large level. The main performance is: the common breakdown when keep working pressure of hydraulic drive system to adjust, correction is ineffective system software not create work pressure, work pressure is not enough, and even the nature no stress at work, or work pressure not to come out, rising or falling again after work and the work pressure is not stable, such as large pressure fluctuation. Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers
1, the harm of work pressure disorder
(1) the implementation of components (such as hydraulic cylinder, oil motor) posture or although the posture but with a load will terminate transport or fatigue, can not get rid of the load and work;
(2) The hydraulic transmission system can not maintain the proper working circulation system, especially in the working pressure control sequence posture control loop
(3) Some valves operated by working pressure can not work, such as hydraulic control valve hydraulic directional valve, one-way throttle valve, hydraulic valve, pressure controller, etc., which also causes that the hydraulic transmission system can not work normally:
(4) The rate of implementing components is insufficient due to the total load flow, and then the rate of fitness exercise is reduced.
(5) Common faults including production safety accidents caused by uncontrollable working pressure adjustment. Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers
Hydraulic pump maintenance
2, the cause of work pressure disorder
(1) hydraulic oil pump cause no total flow output or output total flow is insufficient:
A. The hydraulic oil pump turns into an error, there is no working pressure oil output in essence, and the working pressure of the system software does not come up at all;
B. Because the rated power of the motor is too low, the output power is not enough, or the hydraulic oil pump has been used for a long time, internal damage, large leakage, low capacity and high efficiency, resulting in the total output flow of the hydraulic oil pump is insufficient, and the working pressure of the system software is insufficient.
C. The hydraulic oil pump inlet and outlet are inverted, and the pump can not flip the pump, not only can not oil, but also damaged the pump shaft skeleton seal. Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers
D. For other reasons, such as the pump suction pipe is small, the suction pipe sealing is poor and steam leakage, the hydraulic oil viscosity is too high, the oil filter is blocked by the residue and waste, resulting in the pump suction oil friction resistance is large and cause the suction condition, the total output flow of the pump is insufficient, the system software working pressure can not be raised. Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers
(2) Common faults of pressure regulating valves such as speed regulating valves
For example, the valve core of the speed control valve is stuck in the large opening part, and the working pressure oil output of the hydraulic oil pump flows to the automobile oil tank according to the speed control valve, that is, the working pressure oil and the fuel pipe is short circuit; There will also be no working pressure for the system software due to the blocking of the damping hole of the pressure regulating valve, or the fracture of the variable pressure spring yellow. On the contrary, when the heart of the speed control valve is stuck in the part of the closed valve, the system software can not work under the pressure. Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers
(3) In the whole process of work, it is found that the working pressure can not be raised or the working pressure can not be lowered, which will be the hydraulic reversing valve is not working, resulting in the system throwing support or closed; Or because the valve core and the oil path plate hole is more serious internal leakage caused.
(4) The unloading valve is stuck in the throwing position, the system software is always throwing, and the working pressure cannot be raised.
(5) Internal and external leakage of the system software.
(6) Inside the valve mounting plate (field effect tube), there is a colluding position between the working pressure oil safety channel and the pump oil safety channel. Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers
(7) The heart of the hydraulic directional valve is not adjusted in time for fitness, resulting in the working pressure oil chamber and oil return chamber channeling chamber.
(8) The anti-loose nut connected with the piston rod of the hydraulic cylinder is loose, and the piston rod runs out of the hydraulic cylinder, so that the two cavities of the hydraulic cylinder are communicated.
3, work pressure disorder clearance
(1) Remove the motor wiring, correct the rotation direction of the hydraulic oil pump, and remove the motor with paired output power. Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers
(2) to correct the hydraulic oil pump import and export trade orientation, very special attention to the pump can not be turned.
(3) moderate font thickening pump suction pipe specifications, suction pipe connection to improve the sealing, clean oil filter, etc.
(4) Clear the common faults of the direction valve. If the unloading valve is equipped, clear the common faults of the unloading valve.
(5) Find out the specific address caused by internal leakage and external leakage, and clear the common faults of internal and external leakage.
(6) Check the hydraulic cylinder. Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers
Hydraulic pump maintenance
Preparations in advance before repairing the pump: before repairing the pump, the part of the pump to be repaired should be clearly defined, and the symptoms of the pump should be clearly defined.
(1) How long is the total service life of the hydraulic pump? Pump is not applied for how long can be, if more than ten years, most of the pump will have no maintenance value. Because the stainless steel plate is a certain regularity, the steel base will cause the separation of layer and pump shape change. Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers
(2) how long has the repair pump been applied to the present stage? Before the repair of the pump parts are the goods? What is the maintenance level of the pump staff?
(3) What is the maximum working pressure of the pump? Pump independent variable organization sensitivity, (no response) feedback rate? What is the application temperature of the pump?
(4) What is the noise of the pump? Identify the noise is caused by mechanical equipment or hydraulic noise?
(5) What types and specifications of gear oil are used? What level is the oil product above? Put all the gear oil inside the hydraulic oil filter element of the asphalt paver clean, and check the oil product after? Query car tank bottom version of the residue is how much? What kind of residue are they? If the gear oil quality changes, it is necessary to stipulate the main gear oil removal. Suppliers: Manifold Block Suppliers Manufacturers, China manifold Block Suppliers