Hydraulic Motor China Introduces Cycloid Hydraulic Motor
According to the Hydraulic Motor China , the ring gear is fixedly connected to the housing, and the oil entering from the port pushes the rotor to revolve around a center point. This

Hydraulic Motor China Introduces Cycloid Hydraulic Motor
According to the Hydraulic Motor China , the ring gear is fixedly connected to the housing, and the oil entering from the port pushes the rotor to revolve around a center point. This slow-rotating rotor drives the output through a splined shaft called a cycloidal hydraulic motor. After the introduction of this initial cycloidal motor, after decades of evolution, another concept of the motor began to form. The motor has a roller mounted in the built-in ring gear. The motor with the roller provides high starting and running torque, and the roller reduces friction, which increases efficiency even at very low speeds. Can produce a stable output. By changing the direction of the input and output flow, the motor is quickly reversed and produces equivalent torque in both directions. Each series of motors has a variety of displacement options to meet a variety of speed and torque requirements.

　　

Vickers Vane Pump - The Cause Of The Failure Of The Vane Pump
According to the Vickers Vane Pump , the failure of the vane pump is generally reflected in the problems of high noise, pressure swing, system pressure drop, no pressure, and high

Vickers Vane Pump - The Cause Of The Failure Of The Vane Pump
According to the Vickers Vane Pump , the failure of the vane pump is generally reflected in the problems of high noise, pressure swing, system pressure drop, no pressure, and high system oil temperature.

　　1. No pressure means: when the vane pump is working, there is no pressure in the system. First, check whether the vane pump is discharged from the hydraulic oil. If not, check if the working direction of the pump is correct. The coupling between the motor and the vane pump is connected. Is it normal, the shaft positioning screw is tightened and works, and the blade is not working properly because the viscosity of the hydraulic oil is too high; if the hydraulic oil comes out, it proves that the pump is basically no problem, the problem should be serious leakage of the control valve, total The pressure valve (relief valve) has failed.

　　2. The reason why the system oil temperature is too high: it should be that the system's pipeline is too small, the pressure is too high, the cooling system does not meet the requirements, and the vane pump is trapped in oil, which is reflected in the pump body and system oil temperature is too high, according to the actual situation. Increase the system piping, or reduce the pump displacement (replace the small displacement pump core), adjust the cooling system to increase the cooling effect.

　　3. Pressure swing: It means that the pressure of the system is unstable when the vane pump is working. As long as the pump has no abnormal noise, it should be the problem of the total pressure valve (relieving valve). The spool of the total pressure valve should be checked. Whether it is worn or not, whether the damping is blocked by foreign matter; if the pressure is oscillated due to the wear of the pump core components, the oil pump will have abnormal noise when working.

　　4, system pressure: refers to the blade pump can reach the predetermined pressure when working, the pressure will gradually drop, resulting in the system can not work properly. If this phenomenon occurs in the pump just installed, it should be caused by leakage of the control valve of the system or excessive oil temperature. If the above problem occurs after using for a period of time, it is necessary to check whether the upper and lower oil distribution plates are worn (very flat). Wear) If the oil gap between the upper and lower oil distribution plates is too large and the oil temperature is too high (the mucous membranes are not self-sealing), the leakage of the control valve will cause the system to lose pressure.

　　5, poor oil absorption: a common fault of the vane pump is that the curved surface of the stator wears into a slab-like rib, which is mainly caused by poor oil absorption. The reason is: when the oil pump is insufficiently sucked, the pressure will be high and low, and the effective contact between the top of the blade and the inner curved surface of the stator will intermittently disengage and contact with the change of pressure, and the frequent hard impact will make the oil absorption area of ​​the stator. There was a plaque like a plaque. There are several cases of poor oil absorption: the oil is too sticky (the grade is too large), the filter is clogged, the suction line is too thin, the oil level is too low (the oil is not enough).

　　6. Oil leakage: In the process of newly installed oil pump, gas leakage at the suction port is also a common disease. Its performance is: the noise is too large, the screaming, squeaking, the higher the pressure, the more obvious, the long working oil tank The oil in it will bubble. The main cause of air leakage is that the oil pump inlet flange and the sealing of the pipeline are not good.

　　If you want a vane pump to work hard for you, maintenance and proper use are essential. If you don't know how to use and protect it, you will only add your own cost. On the contrary, if you work hard, you can also Make your production process less troublesome and more effective.

　　As professional China V/VQ Vane Pump manufacturers and V/VQ Vane Pump suppliers, Taizhou Eternal Hydraulic Machine Co.,Ltd can supply you with high-quality products and services. Eternal Hydraulic commit ourselves to be Global One-Stop Mall for Hydraulic products In the world, with professional hydraulic solutions and nice Quality & Price products to satisfy with each customer. The company firm believes that " Only The Best Can Satisfied The Best", become the First Purchase Choice of hydraulic components for all customers in the world.

　　

Parker Gear Pump Analyzes Several Faults Of Gear Pump
The following are several types of faults that may occur in the gear pump during operation. The cause of the malfunction and the preventive measures are explained by the Parker Gear Pump

Parker Gear Pump Analyzes Several Faults Of Gear Pump
The following are several types of faults that may occur in the gear pump during operation. The cause of the malfunction and the preventive measures are explained by the Parker Gear Pump :

　　A. Can not discharge

　　(1) Fault phenomenon: the pump can not discharge

　　The cause of the failure: a, the direction of rotation is reversed; b, the suction or discharge valve is closed; c, the inlet is not material or the pressure is too low; d, the viscosity is too high, the pump can not bite

　　Countermeasures: a, confirm the direction of rotation; b, confirm whether the valve is closed; c, check the valve and pressure gauge; d, check the viscosity of the liquid, the flow rate according to the speed ratio when running at low speed, if there is flow, the flow is insufficient,

　　B. Insufficient traffic

　　(2) Fault phenomenon: insufficient pump flow

　　The cause of the failure: a, the suction or discharge valve is closed; b, the inlet pressure is low; c, the outlet line is blocked; d, the stuffing box leaks; e, the speed is too low

　　Countermeasures: a, confirm whether the valve is closed; b, check whether the valve is open; c, confirm whether the discharge is normal; d, tightening; when a large number of leaks affect production, stop operation, disassembly inspection; e, check the actual speed of the pump shaft ;

　　C. abnormal sound

　　(3) Fault phenomenon: abnormal sound

　　Fault reason: a, the coupling eccentricity or poor lubrication b, motor failure; c, the reducer is abnormal; d, the shaft seal is not properly installed; e, the shaft is deformed or worn

　　Countermeasures: a, correct or fill grease; b, check the motor; c, check the bearings and gears; d, check the shaft seal; e, parking disassembly check

　　D. The current is too large

　　(4) Fault phenomenon: current is too large

　　The cause of the failure: a, the outlet pressure is too high; b, the melt viscosity is too large; c, the shaft package is poorly fitted; d, the shaft or bearing wear; e, the motor failure

　　Countermeasures: a, check the downstream equipment and pipeline; b, check the viscosity; c, check the shaft seal, adjust properly; d, check after parking, whether the hand truck is too heavy; e, check the motor

　　E. Pump stop

　　(5) Fault phenomenon: the pump suddenly stops

　　Fault reason: a, power failure; b, motor overload protection; c, coupling damage; d, outlet pressure is too high, interlocking reaction; e, pump bite abnormal; f, shaft and bearing stuck stuck

　　Countermeasures: a, check the power supply; b, check the motor; c, open the safety cover, check the car; d, check the instrument interlock system; e, after parking, positive and negative reversing; f, confirmation

　　F. Sealing oil leakage

　　 Fault phenomenon: sealing oil leakage

　　Causes: a, the shaft seal is not adjusted well, b, the seal ring wears and is fine, c, mechanical seal movement, static ring friction surface with the damage, four, spring relaxation

　　Countermeasures: a, re-adjust b, tighten the gland bolts or replace the seals, c, replace the moving and static rings or re-grind, fourth, replace the spring

　　G. Other phenomena

　　1, the cause

　　1 The flank clearance of the inner and outer rotors is too large, so that the suction oil chambers communicate with each other. The volumetric efficiency is significantly reduced and the output flow is insufficient;

　　2 axial clearance is too large;

　　3 The sealing surface in the oil suction pipe is not tightly sealed, so that the pump sucks in air, and the effective suction flow rate is reduced;

　　4 oil absorption is not smooth. If the viscosity of the oil is too large, the oil filter is blocked by dirt, etc., resulting in a decrease in the suction flow rate;

　　5 The relief valve is stuck in the half-open position, and part of the flow from the pump is returned to the tank through the overflow valve, so that the flow into the system is not enough. At this time, there is a failure that the system pressure does not go up.

　　2, the elimination method

　　1 Replace the inner and outer rotors so that the backlash is within the specified range (generally less than 0.07mm);

　　2 Grind both ends of the pump body to ensure that the axial clearance of the inner and outer rotors is within 0.02~0.05mm;

　　3 Replace the broken suction pipe seal, wrap the threaded part of the pipe joint with Teflon tape and tighten the pipe joint;

　　4 Select the oil of the appropriate viscosity and clean the oil filter to make the oil flow smooth. And increase the suction pipe diameter as appropriate;

　　5 Repair the overflow valve to eliminate the phenomenon that the overflow valve is shorted to the fuel tank and the effective flow of the pump is reduced.