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Note describes the main parameters of the hydraulic pump

Displacement, flow

Displacement m3 / r

Each take a turn. Its seal cavity geometry change calculated volume of liquid discharged.

Theoretical flow Q0 m3 / s

The pump unit time by the seal cavity geometry, changes in the calculated volume of liquid discharged.

The actual flow rate Q m3 / s

Flow rate at the outlet of the pump work.

pressure

Rated pressure Pa

Under normal operating conditions, according to the test standard specifies a maximum pressure of continuous operation.

Maximum pressure Pmax Pa

According to test standard specifies the maximum pressure allowed short run.

Operating pressure p Pa

Pressure pump at work.

Rotating speed

Rated speed n r / min

At rated pressure, to the maximum speed of continuous long-term normal operation.

Maximum speed r / min

At rated pressure, exceeding the rated speed and maximum permissible speed transient operation.

Minimum speed r / min

The normal operation of the allowed minimum speed.

power

Input power W

Drive shaft mechanical power.

Output Power W

Hydraulic pump output power, which is the actual flow rate and pressure of the pump the actual output of the product.

Mechanical Power W

T- pressure p when the pump input torque or motor output torque. N · m

Torque

Actual torque N · m

Pump input torque Ti.

effectiveness

Volumetric efficiency ηv

The ratio of actual output flow of the pump with the theoretical flow.

Mechanical efficiency ηm

Pump theoretical torque (generated by the pressure acting on the rotor of the hydraulic torque) and the actual output shaft torque ratio.

The total efficiency η

Output power and input power ratio pump.

?Diesel high-pressure pump high-pressure oil pump problems analysis is known as diesel "heart" is the diesel fuel supply system is the most important part, it's fundamental role is timing, quantitative supply for the high-pressure diesel injectors. Diesel high-pressure pump is not a normal job, working on all diesel has a crucial impact. Diesel engine can not start the diesel engine can not start the trouble can not reason is that low pressure oil to the high pressure fuel supply. 1, the oil in the air, to obstruct the fuel into the high-pressure pump oil chamber. Place a long time on a diesel engine, it is a normal appearance. Its approach is to release the high pressure pump bleed screw, hand pump to the high pressure pump oil, wipe clean the air, and then tighten the bleed screw. If effective, it is possible to loosen the filter pipe joints deflated, then bleed vent screw. 2. Low oil blocked, so no high pressure fuel pump low pressure oil chamber oil. The site of obstruction main pump oil inlet filters and filter elements, blocking reason is Dirty, attributed to normal skills situation changed, if found should immediately eliminate or replace. 3, the low-pressure pump to the high pressure fuel supply can not. Pump piston severe wear or damage, spring or other parts may cause damage to the appearance of such problems, identify the cause be replaced. 4, the high-pressure fuel supply pipeline or a road link portion severe leak. Check tubing connector is not loose and tubing is not damaged, loose to tighten, to replace damaged.

Our daily test axial piston pump, the press does not load, empty load test can be run properly, when we put the object, but no pressure can not operate, this phenomenon with the axial piston pump wear components are influences.

????Axial piston pump inside the port plate and the plunger, in the case of high-speed operation, the plunger and the cylinder with high clearance requirements, produce flow and pressure, if after a long run-in with the gap enlarged, it will cause internal leakage , which can not reach the corresponding flow and pressure; in addition, in the case of the port plate rotates at high speed, with the entry of the passage of time and impurities directly wear, then not produce pressure, flow generated directly through the gap and return port directly to tank vent.

Above it is an axial piston pump manufacturer to introduce you to factors that can not operate normally, hoping to help everyone better solution. When we experience this, be sure to check the wear of each part, timely check and replace, guaranteed to work properly.

Whether using a manual pump, or the use of other related products, no matter how high its quality, its use for some time, inevitably there will be some failures, large and small, which have an impact on our work, then In order to use a manual pump can proceed smoothly, how to prevent these failure it?

??????Xiao Bian for you on this issue, we first need to regularly check and replace aging or damaged oil seal or "O" ring sealing gasket; in addition to the manual replacement of worn hydraulic gear pump or pump bushings, wear light in flat end mill will be smooth. Its flatness tolerance 0.03mm; the end face of the sleeve is less than the plane manual pump body (normal is less than 2.5 ~ 2.6mm), such as ultra-poor should be the next sleeve plus 0.1 ~ 0.2mm copper to compensate for installation When put on the rear axle load should be set; if you can do these points compared with its applications will play help.

???????Jiangsu Hengli Hydraulic Co., Ltd. is specialized in producing electric hydraulic pumps and various hydraulic equipment business. Specializing in the production of high pressure electric pump, high pressure electric pump stations, high pressure