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Title:
DUAL-ROTOR ROTARY POSITIVE DISPLACEMENT PUMP
Document Type and Number:
WIPO Patent Application WO/2015/154434
Kind Code:
A1
Abstract:
A dual-rotor rotary positive displacement pump comprising a pump housing (1), a main rotor (10), and an auxiliary rotor (20). 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) is mounted in the pump housing lower cavity (9). The auxiliary rotor (20) is mounted in the pump housing upper cavity (8). The main rotor (10) is constituted by a main transmission shaft (11) and at least two cams (12 and 13). These cams (12 and 13) are distributed around the circumference of the main transmission shaft (11). The auxiliary rotor (20) is constituted by an auxiliary transmission shaft (21) and a cylinder (25) having cam grooves (22). The number of the cam grooves (22) is identical to the number of the cams (12 and 13) on the main rotor (10). The auxiliary transmission (21) is arranged at the center of the cylinder (25). The cams (12 and 13) mounted on the main rotor (10) are tangential to the inner wall of the pump housing lower cavity (9). The cylinder (25) constituting the auxiliary rotor (20) is tangential to the inner wall of the pump housing upper cavity (8). The cams (12 and 13) mounted on the main rotor (10) fit the cam grooves (22) on the auxiliary rotor (20). The positive displacement pump is structurally simple and 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.

Inventors:
CHEN HONGLIANG (CN)
LI HE (CN)
LIU LINHAI (CN)
CHEN HAOYU (CN)
Application Number:
PCT/CN2014/089465
Publication Date:
October 15, 2015
Filing Date:
October 24, 2014
Export Citation:
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Assignee:
CHEN HONGLIANG (CN)
International Classes:
F04C2/12
Foreign References:
CN203783890U2014-08-20
JPS51128702A1976-11-09
JPS5151442Y21976-12-09
JPH0465976U1992-06-09
CN103119301A2013-05-22
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)
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