Two-dimensional dual axial piston pump

Abstract

The invention discloses a two-dimensional dual axial piston pump which comprises a shell, a left cylinder, a right cylinder, a left piston and a right piston. The left cylinder and the right cylinder are arranged in the shell through positioning steel balls and are fixedly connected with the shell through connecting sleeves. An oil sucking and draining hole and a leaking oil return channel are formed in the shell. A left end cover is fixedly installed at the left end of the shell. The right end of the left cylinder and the left end of the right cylinder are fixedly connected with a left constant-adding and constant-subtracting curved-surface rail and a right constant-adding and constant-subtracting curved-surface rail respectively, and rolling curved surfaces of the left constant-adding and constant-subtracting curved-surface rail and the right constant-adding and constant-subtracting curved-surface rail are the same. The left constant-adding and constant-subtracting curved-surface rail and the right constant-adding and constant-subtracting curved-surface rail are arranged in a 90-degree staggered manner, and the highest point and the lowest point of the left constant-adding and constant-subtracting curved-surface rail correspond to the lowest point and the highest point of the right constant-adding and constant-subtracting curved-surface rail respectively. The two-dimensional dual axial piston pump has the advantages that the structure is novel and compact, the size is small, weight is low, transmission is simple, torque pulsation is zero, the speed is easy to adjust, and displacement is high.

Description

technical field [0001] The invention relates to a two-dimensional double-connected axial piston pump, belonging to hydraulic pumps and hydraulic motors in the field of fluid transmission and control. Background technique [0002] The double-piston pump uses the piston, the cylinder and the intermediate connector as the main working components, and its structure is symmetrical. When the piston reciprocates in the cylinder, the volume of the closed working volume chamber composed of the piston and the cylinder changes to complete the oil suction and discharge process. According to the different arrangements of the piston in the cylinder, the piston pump is divided into two categories: radial type and axial type. Due to its complex structure and large volume, radial piston pumps have been replaced by axial piston pumps in many occasions. The piston centerline of an axial piston pump is parallel (or substantially parallel) to the axis of the cylinder block. This type of pump ...

AI Technical Summary

Problems solved by technology

The traditional axial piston pump has many relatively moving parts inside, has high requirements on material and machining accuracy, is sensitive to oil pollution, has high requirements and costs for processing, use, and maintenance, and is expensive; the cylinder block is accompanied by the transmission shaft Rotation, 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 cylinder temperature rises faster under high-speed rotation, and the flow distribution The wear of parts such as discs and pistons directly affects the service life and durability of the pump

And 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

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