Double-cycloid rotor pump

A rotor pump and double pendulum technology, applied in the field of hydraulic pumps, can solve the problems of large consumables, increased specifications, volume, high operating costs, etc., and achieve the effects of cost reduction, simplified structure, and easy processing and installation

Inactive Publication Date: 2020-03-17
夏国庆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, this patent also has limitations. It is only suitable for occasions with a small amount of flow, and can achieve the purpose of providing pressure oil stably and accurately. It can increase its specifications and volume, resulting in heavy equipment, many consumables, and high operating costs.

Method used

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Embodiment Construction

[0028] The structure of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] Structure: The present invention mainly consists of transmission shaft 1, bearing 2, eccentric shaft 3, backing plate 4, inner rotor 5, column pin 6, sleeve 7, outer rotor 8, housing 9, front cover 10, rear cover 11 and flow distribution Valve 12 etc. are made up. The transmission shaft 1 is fixedly connected with the eccentric shaft 3 . The inner rotor 5, the sleeve 7 and the outer rotor 8 form several independent closed tooth chambers, and these tooth chambers communicate with the oil inlet and outlet ports A and B through the oil passage C and the distribution valve 12 respectively. The inner rotor 5 is a short-width epicycloid gear, the outer rotor 8 is a short-width hypocycloid ring gear, the axis of the inner rotor 5 coincides with the axis of the eccentric shaft 3, the axis of the outer rotor 8 coincides with the axis of the tr...

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Abstract

The invention relates to a hydraulic transmission device, and particular relates to a hydraulic pump of a cycloid rotor type structure. A double-cycloid rotor pump comprises a front cover (10), a shell (9), a rear cover (11) and a transmission shaft (1), wherein the transmission shaft (1) is located in the center of a circle and extends into the shell (9); a corresponding number of column pins (6)are distributed on the front cover (10) or the rear cover (11) and on the circumference of the center of the circle, each column pin (6) is sleeved with a sleeve (7) with an inner diameter larger than an outer diameter of each column pin (6), and an outer rotor (8) of a circular ring and a short-amplitude inner cycloidal gear is sleeved on the periphery of the circumference composed of the sleeve(7). The double-cycloid rotor pump is characterized in that an axis of connection of an eccentric shaft (3) and the transmission shaft (1) is offset from each other, and an inner rotor (5) of a short-amplitude outer cycloidal gear is rotationally sleeved on the eccentric shaft (3). After the eccentric shaft structure is adopted, the original advantages are kept on the original basis, and new characteristics are added, the axes of the inner rotor and the outer rotor have certain eccentricity, if the eccentricity is larger, so that the flow is larger, and the larger flow can be obtained.

Description

technical field [0001] The invention relates to a hydraulic transmission device, in particular to a hydraulic pump with a cycloid rotor structure. Background technique [0002] At present, commonly used hydraulic oil pumps include gear pumps, vane pumps, plunger pumps, and cycloid rotor pumps. Each pump has advantages and disadvantages. [0003] Gear pumps have problems such as "trapped oil", unbalanced radial hydraulic pressure, and large flow pulsation. "Trapped oil" causes a large additional load on the gears and bearings, the bearing life is short, and the oil pump efficiency is low. In addition, "trapped oil" will also increase the oil temperature, which will easily generate air bubbles, and the bursting of air bubbles will cause loud noises. The unbalanced radial hydraulic pressure causes the gear shaft to be bent, the radial clearance of the gear in the oil suction chamber becomes smaller, and the gear and the inner cavity of the pump body are rubbed or stuck, so t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/10F04C15/00
CPCF04C2/082F04C2/102F04C15/0065F04C2240/20F04C2240/60
Inventor 夏国庆牛祥
Owner 夏国庆
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