Oblique crankshaft Variable plunger pump

Abstract

The invention discloses a variable piston pump with an inclined crankshaft which includes a pump body; the end surfaces of the pump body are connected with the end covers; a transmission shaft penetrates the end covers of the pump body and are sealed with the end covers; piston devices are respectively arranged on the radical direction of the circle of the inner edge of the pump body; the incline crankshaft is arranged on the coaxial direction in the pump body; the incline crankshaft consists of at least three sections and is provided with a front section as well as a back section the axes of which are concentric; the crossed incline shaft section of the axes of the front section and the back section is arranged between the front section and the back section; the included angle of the axis of the incline shaft section and the front section as well as the back section is less than 25 degrees; wherein, one section of the incline crankshaft is a slide connection section and is connected with the transmission shaft in a sliding way; the other section of the incline crankshaft is a variable connection section and is connected with a variable adjusting device; the middle section of the incline crankshaft is the incline shaft section; a wobbler is arranged on the inclined shaft section; the circle of the wobbler is connected with the bottom part of the piston device. No flow distribution devices are arranged in the pump body of the variable piston pump with an incline crankshaft; simultaneously the pressure oil loss is reduced as no flow distribution devices are arranged; the variable range is large; the operation is convenient; rolling friction can be adopted on transmitting a main power, thus reducing a friction and improving the transmission efficiency. The invention relates to a completely novel hydraulic power device.

Description

technical field [0001] The invention belongs to hydraulic power components, in particular to a variable displacement plunger pump. Background technique [0002] At present, there are axial flow distribution devices in the structure of the radial variable plunger pump and the swash plate axial variable pump, such as CN200720031562.8, which consists of a housing, a pump cover, a flow distribution shaft, a drive shaft, a rotor, a stator, Composed of sliding shoes, limit valves and variable control valves, the internal distribution shaft, rotor, stator and other structures of this pump are relatively complex, and the pressure loss is relatively large. At the same time, the friction between the sliding shoes and the swash plate of the swash plate axial variable pump The loss is larger, that is, the friction loss of the main transmission is larger. Therefore, the maintenance and processing of the radial variable piston pump with axial flow distribution device is complicated and t...

AI Technical Summary

Problems solved by technology

[0002] At present, there are axial flow distribution devices in the structure of the radial variable plunger pump and the swash plate axial variable pump, such as CN200720031562.8, which consists of a housing, a pump cover, a flow distribution shaft, a drive shaft, a rotor, a stator, Composed of sliding shoes, limit valves and variable control valves, the internal distribution shaft, rotor, stator and other structures of this pump are relatively complex, and the pressure loss is relatively large. At the same time, the friction between the sliding shoes and the swash plate of the swash plate axial variable pump Greater losses, i.e. greater friction losses in the main drive

Therefore, the maintenance and processing of the radial variable piston pump with axial flow distribution device is complicated and the oil loss is large

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