JPH0237285U

JPH0237285U -

Info

Publication number: JPH0237285U
Application number: JP11617188U
Authority: JP
Priority date: 1988-09-02
Filing date: 1988-09-02
Publication date: 1990-03-12
Anticipated expiration: 2003-09-02
Also published as: JPH0643510Y2

Description

[Brief explanation of the drawing]

第１図は本考案のタンデムポンプの縦断面図、
第２図は従来のタンデムポンプの縦断面図である
。１０……第１ポンプハウジング、１１……第２
ポンプハウジング、１３……中空室、２０……第
１カムリング、２１……第１サイドプレート、２
２……第２カムリング、２３……第２サイドプレ
ート、３０……ピン、３４……連通孔、４２……
第１作用室、４３……第２作用室、４５……第１
連通路、４７……第２連通路。 Figure 1 is a longitudinal sectional view of the tandem pump of the present invention.
FIG. 2 is a longitudinal sectional view of a conventional tandem pump. 10...first pump housing, 11...second
Pump housing, 13... Hollow chamber, 20... First cam ring, 21... First side plate, 2
2... Second cam ring, 23... Second side plate, 30... Pin, 34... Communication hole, 42...
First action chamber, 43...Second action chamber, 45...First
Communication path, 47...second communication path.

Claims

[Scope of utility model registration request]

A first cam ring, a first side plate, a second cam ring, and a second side plate are sequentially fitted into the hollow chamber of the pump housing, and a rotating shaft is rotatably supported in the pump housing around the centers of the first and second cam rings. The first cam ring has a vane that is in sliding contact with the inner cam surface of the first cam ring and is slidably held in the radial direction.
A second rotor, which holds vanes slidably in the radial direction that are in sliding contact with the rotor and the inner circumferential cam surface of the second cam ring, is rotatably connected to the rotating shaft, and the first and second cam rings are attached to the pump housing. A second fitting supported by a pin, forming a first fitting part on the end face of the pump housing on the second side plate side, and slidably fitting into the first fitting part on the end face of the second side plate. forming a fitting part, and dividing the space between the end surface of the hollow chamber on the second side plate side and the second side plate into a first working chamber and a second working chamber by the first and second fitting parts; In a tandem pump that sucks fluid from a suction port formed in each side plate and discharges fluid to a discharge port, a first working chamber is connected to a second cam ring, and a discharge port on the second rotor side communicates with the first working chamber. A communication path is formed, and the first
A tandem pump characterized in that a second communication path is formed that connects a discharge port of a rotor and a second working chamber, and a communication hole provided inside the pin is used as the second communication path.