Roller type force balancing unit pump

Abstract

Disclosed is a roller type force balancing unit pump. A rolling bearing is mounted between a right coupling and a right roller assembly. Left and right cams are symmetrically distributed on both sidesof a pump core assembly with the phase difference of 90 DEG. A roller assembly rolls on the cam surfaces. Four conical rollers are distributed on the single side. Every two conical rollers are fixedto a C-shaped roller support as a group through a pin shaft. A copper sleeve of a pump core assembly and a cylinder body are respectively provided with two pairs of rectangular high pressure and low pressure oil holes uniformly distributed in the circumferential direction. The rectangular high pressure and low pressure oil holes correspondingly make contact with first and second flow distributiongrooves in the upper portions of a piston to suck and discharge oil. The cylinder body is provided with an annular oil groove communicating with the high-pressure oil holes, and oil liquid flowing outof the two high-pressure oil holes is collected together. The mass of a rotor which is composed of a first roller support assembly, a third roller support assembly, a transmission shaft and left andright concentric rings should be equal to the sum of the mass of a rotor which is composed of a second roller set, a fourth roller support assembly and the piston. First high pressure and low pressurecavities in a pump core communicate with the first flow distribution groove of the piston all the time. Second high pressure and low pressure cavities communicate with the second flow distribution groove of the piston all the time.

Description

technical field [0001] The invention relates to a hydraulic plunger pump, belonging to hydraulic pumps and hydraulic motors in the field of fluid transmission and control. Background technique [0002] As the power component of the hydraulic system, the hydraulic pump can transfer the mechanical energy of the prime mover or other external energy to the liquid, increase the energy of the liquid, and is widely used in construction machinery and aerospace. However, due to the limitation of friction pair and size, the traditional plunger pump has problems such as low efficiency, large vibration, high noise, and low service life, and it is difficult to achieve the goal of high speed and high pressure. [0003] The traditional one is the axial piston pump, which has many relatively moving parts inside, has high requirements for material and machining accuracy, is sensitive to oil pollution, has high requirements and costs for processing, use, and maintenance, and is expensive; Ro...

AI Technical Summary

Problems solved by technology

However, the traditional plunger pump has problems such as low efficiency, large vibration, high noise, and low life due to the limitations of friction pairs and size, and it is difficult to achieve the goal of high speed and high pressure.

[0003] The traditional one is the axial piston pump, which has many relatively moving parts inside, has high requirements for material and machining accuracy, is sensitive to oil pollution, has high requirements and costs for processing, use, and maintenance, and is expensive; Rotating with the transmission shaft, the moment of inertia is large, resulting in slow response to start, stop, and speed regulation, which is not conducive to controlling the output flow of the pump through speed regulation; there are many friction pairs in the cylinder, and the temperature of the cylinder will rise under high-speed rotation Faster, the wear of the valve plate, plunger and other parts directly affects the service life and durability of the pump

In addition, due to the limitation of the working principle of the plunger pump itself, each plunger can only achieve one oil suction and one oil discharge when the transmission shaft rotates one revolution, and its displacement is limited.

Images