Title:
DUAL-ROTOR ROTARY POSITIVE DISPLACEMENT PUMP
Document Type and Number:
WIPO Patent Application WO/2015/154624
Kind Code:
A1
Abstract:
A dual-rotor rotary positive displacement pump comprising a pump housing (1), a main rotor (10, 30, 50, and 60), and an auxiliary rotor (20 and 40). An upper cavity (8) and a lower cavity (9) are provided within the pump housing (1). A water inlet (14) and a water outlet (15) are provided on sidewalls of the pump housing lower cavity (9). The main rotor (10, 30, 50, and 60) is mounted in the pump housing lower cavity (9). The auxiliary rotor (20 and 40) is mounted in the pump housing upper cavity (8). The main rotor (10, 30, 50, and 60) is constituted by a main transmission shaft (11, 31, 51, and 61) and at least two cams (12/13, 32/33/34, 52/53, and 62/63/64). These cams (12/13, 32/33/34, 52/53, and 62/63/64) are distributed around the circumference of the main transmission shaft (11, 31, 51, and 61). The auxiliary rotor (20 and 40) is constituted by an auxiliary transmission shaft (21 and 41) and a cylinder having cam grooves (22/23 and 42/43/44). The number of the cam grooves (22/23 and 42/43/44) is identical to the number of the cams (12/13, 32/33/34, 52/53, and 62/63/64) on the main rotor (10, 30, 50, and 60). The auxiliary transmission (21 and 41) is arranged at the center of the cylinder. The cams (12/13, 32/33/34, 52/53, and 62/63/64) mounted on the main rotor (10, 30, 50, and 60) are tangential to the inner wall of the pump housing lower cavity (9). The cylinder constituting the auxiliary rotor (20 and 40) is tangential to the inner wall of the pump housing upper cavity (8). The cams (12/13, 32/33/34, 52/53, and 62/63/64) mounted on the main rotor (10, 30, 50, and 60) fit the cam grooves (22/23 and 42/43/44) on the auxiliary rotor (20 and 40). The positive displacement pump is structurally simple, easy to process, low in costs, and light in weight, and, provides a wide work area, high efficiency, large flow, extended service life, low noise, and a broad range of uses.
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Inventors:
CHEN HONGLIANG (CN)
LI HE (CN)
CHEN HAOYU (CN)
LI HE (CN)
CHEN HAOYU (CN)
Application Number:
PCT/CN2015/075045
Publication Date:
October 15, 2015
Filing Date:
March 25, 2015
Export Citation:
Assignee:
CHEN HONGLIANG (CN)
International Classes:
F04C2/12; F04C2/20
Domestic Patent References:
| WO1998004809A1 | 1998-02-05 |
Foreign References:
| CN203783890U | 2014-08-20 | |||
| DE3537803A1 | 1987-04-30 | |||
| CN102795325A | 2012-11-28 | |||
| DE9209641U1 | 1992-11-19 | |||
| JPS5260404A | 1977-05-18 | |||
| CN201381985Y | 2010-01-13 | |||
| US3894822A | 1975-07-15 |
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
北京超凡志成知识产权代理事务所（普通合伙） (CN)
北京超凡志成知识产权代理事务所（普通合伙） (CN)
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