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Eccentric double-cycloid rotor pump

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

Inactive Publication Date: 2010-12-01
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

[0032] The structure of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0033] 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, in particular to a hydraulic pump with the cycloid rotor structure. The eccentric double-cycloid rotor pump comprises a front cover (10), a shell (9), a rear cover (11) and a transmission shaft (9) which is arranged at the centre of a circle and extends in the shell (9), wherein the corresponding number of pins (6) are distributed on the concentric circumferences of the front cover (10) or rear cover (11); a sleeve (7) of which internal diameter is more than the external diameter of the pins (6) is sleeved on each pin (6); and the annular outer rotor (8) of a curtate hypocycloidal gear is sleeved on the outside of the circumference of the sleeve (7). The invention is characterized in that the inner rotor (5) of a curtate epicycloidal gear is sleeved on an eccentric shaft (3) which deviates form the connecting shaft of a transmission shaft (1). By adopting the eccentric shaft structure, the rotor pump has new characteristics on the original basis while the original advantages are maintained; and the axes of the inner and outer rotor have a certain eccentric distance, and the larger the centric distance is, the higher the flow is, thus higher 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): F04C2/10
Inventor 林菁
Owner SHANGHAI NORMAL UNIVERSITY
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