Servo motor pump of oil sealing belt type valve plate

By designing the oil-sealing belt distribution disc servo motor pump with cantilever shaft structure and deep groove ball bearing, the problems of the existing technology's small-scale design and insufficient high-voltage and high-speed sealing are solved, and high speed and durability are achieved, which is suitable for the needs of micro servo motor pumps.

CN119712480APending Publication Date: 2025-03-28BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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Patent Information

Application Number
CN202411740499.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-29
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing servo motor pumps have insufficient sealing and durability under miniaturization design and high-voltage and high-speed operating conditions, which cannot meet the ultimate miniaturization and long-term use needs of micro servo motor pumps.

Method used

A servo motor pump with oil sealing belt type flow distribution disc is designed, adopting cantilever shaft structure and deep groove ball bearing, which reduces needle roller bearings in the flow distribution disc, improves the speed of the cylinder and miniaturizes the design capability. At the same time, multiple waist-shaped grooves and kidney-shaped holes are distributed on the flow distribution disc, realizing the inner and outer oil sealing belt and flow distribution structure, enhancing sealing and durability.

Benefits of technology

It realizes a miniaturized design and high speed, enhances sealing and durability, can be used for a long time under high-voltage and high-speed operating conditions, meets the needs of micro servo motor pumps, and is suitable for aerospace servo systems and other fields.

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Abstract

The invention discloses a servo motor pump with an oil sealing belt type valve plate. The servo motor pump comprises a shell, a shaft assembly, a plunger pump core, a servo motor and the valve plate, wherein the shaft assembly, the plunger pump core, the servo motor and the valve plate are installed in the shell. The bottom face of the cylinder body of the plunger pump core is of a plane structure, no oil sealing belt structure exists except the multiple evenly-distributed kidney-shaped holes, and stress deformation caused by complex machining of the small-size copper material cylinder body is effectively avoided. A plurality of kidney-shaped grooves are distributed in the valve plate, inner and outer oil sealing belts, an auxiliary supporting belt and a leakage channel are arranged on the bottom face of the valve plate, and the inner and outer oil sealing belts and a flow distribution structure are achieved. In addition, the two bearings are arranged on one side of the servo motor pump, and a cantilever structure is formed for the plunger pump core. The structure is designed to adapt to the high-rotating-speed and small-size plunger pump cylinder body, and the cylinder body supporting problem is effectively solved.
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