hydraulic oil pump miniature hydraulic pump hydraulic pumps how they work

isplacement, axial piston pump of the investigation should be internal leakage and external leakage. When external leakage or leakage fairly serious significantly reduce not only emissions, but also will not increase the rated pressure axial piston pump, or produce significant pressure fluctuations, even will not work. Resolve displacement and pressure problem, in this section refer to the technical means to check and repair parts, repair the related parts for investigation. The investigation focused on the middle should check the movements with the oil pump body parts wear, galling or scratching circumstances be repaired or replaced, this is the only way to fix leaks inside. External leakage is a former pump, the intermediate pump, variable housing and other cover, flanges and other connection member, poor contact, loose screws, seals aging caused. Each connecting member mainly poor contact end surface damage caused by repeated assembly and disassembly, available at Whetstone grinding bump. As a result of leakage caused by loose screws, tighten the screws to simply pay attention to when the twist angle biases. Too much internal leakage may be washed out of the spindle oil seal leakage form, it should overhaul the intermediate casing and parts, replace oil seal.
Hydraulic works
Hydraulic pump is an important means of the hydraulic system. It relies on the plunger reciprocates in the cylinder, so that the volume of the cavity seal work to achieve a change in the suction pressure oil. Pumps with a rated pressure, compact structure, high efficiency and easy flow regulation, etc., are widely used in high pressure, high flow and flow need to adjust the occasion, such as a hydraulic machine, construction machinery and ships in.
The hydraulic pump is a reciprocating pump, volume pumps belong, which plunger driven by the pump shaft eccentrically rotated, reciprocated, its suction and discharge valves are a check valve. When the plunger is pulled outside, the working chamber pressure is reduced, the outlet valve is closed, lower than the inlet pressure, the inlet valve is opened, the liquid enters; when you push the plunger inside, studio pressure increases, the inlet valve is closed, it is higher than the outlet pressure, the outlet valve is opened, the liquid is discharged. When the cylinder drive shaft rotates, the swash plate plunger pulled out from the cylinder or pushed back, complete oil suction process. Working plunger and the cylinder bore cavity consisting of oil through the oil pan with a suction pump, respectively, drain cavity. Variable mechanism for changing the swash plate angle by adjusting the swash plate angle may change the pump displacement.
Hydraulic structure:
Axial hydraulic pump into the form of a radial pump and two representative structures; due to the radial pump is a new type of high-tech and efficient pump, with the accelerating radial pump bound become an important part of the hydraulic pump applications.
Pump maintenance:
Swash plate type axial pump generally used to rotate the cylinder, end assignment form. End surface of the cylinder by a two-piece metal plate lined with steel oil pan consisting friction, and most are methods using plane assignment, so maintenance is more convenient. With oil pan is one of the key components of the axial hydraulic pump, when the pump high-pressure oil on the one hand the working chamber of the cylinder to the oil pan, on the other hand with film pressure between the oil pan and the cylinder block to the cylinder form Hydraulic reverse thrust body with the oil pan so that the cylinder departing. The cylinder of the hydraulic oil pan design is slightly larger than the pressing force Fn hydraulic oil pan on cylinder reverse thrust Ff, namely Fn / Ff = 1.05 ~ 1.1, the pump is working properly and maintain a high volumetric efficiency.
Single-piston pump
There are eccentric structures, plunger, spring, cylinder, two-way valve. Closed volume is formed between the plunger and the cylinder bore. Eccentric rotation of a turn, reciprocates a plunger up and down, the downward movement of the suction, the upward movement of oil discharge. Pump oil volume per revolution is called a turn discharge displacement, displacement is only concerned with the structural parameters of the pump.
Horizontal Piston Pump
Horizontal piston pumps are installed in parallel by several plunger (typically 3 or 6), with a crankshaft via connecting rod slider or by the eccentric shaft is directly driven reciprocating plunger to achieve suction, exhaust fluid hydraulic pump. They are also using valve type flow device, and mostly quantitative pump. Mine hydraulic support systems are generally horizontal piston pump emulsion.
Emulsion pump for the coal face, to provide hydraulic support for the emulsion, works by the rotation of the crankshaft driven piston reciprocating motion, to realize aspiration and drainage.
Axial formula
Axial piston pump (English name: Pistonpump) is the direction of reciprocation of the piston and