JPH0365876U

JPH0365876U -

Info

Publication number: JPH0365876U
Application number: JP12766689U
Authority: JP
Priority date: 1989-10-31
Filing date: 1989-10-31
Publication date: 1991-06-26

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係るベーンポンプ
を示す要部断面図、第２図はプレツシヤープレー
トの構成を示す正面図、第３図はポンプ回転数と
差圧との関係を示すグラフである。１……ベーンポンプ、３……圧力室、７……ロ
ータ、８……嵌合溝、９……ベーン、１０……サ
イドプレート、１１……プレツシヤープレート、
１２……カムリング、１８……吸込域ベーン下部
ポート、１９……吐出域ベーン下部ポート、２０
……連通溝、２２，２３……連通孔、２４……閉
止部材。 Fig. 1 is a cross-sectional view of the main parts of a vane pump according to an embodiment of the present invention, Fig. 2 is a front view showing the configuration of the pressure plate, and Fig. 3 shows the relationship between pump rotation speed and differential pressure. It is a graph. 1... Vane pump, 3... Pressure chamber, 7... Rotor, 8... Fitting groove, 9... Vane, 10... Side plate, 11... Pressure plate,
12...Cam ring, 18...Suction area vane lower port, 19...Discharge area vane lower port, 20
...Communication groove, 22, 23...Communication hole, 24...Closing member.

Claims

[Scope of utility model registration request]

A rotor having vanes slidably inserted into a number of fitting grooves formed in the radial direction, a cam ring that accommodates this rotor, and a pump chamber that is disposed on both sides of the rotor and the cam ring, and that is connected to the pump chamber along with the cam ring. In a vane pump comprising a side plate and a pressure plate forming a pressure plate, a pair of discharge area vane lower ports communicating with the fitting groove are formed on an inner surface of the pressure plate and at opposing positions. and a pair of suction region vane lower ports penetrating from the inner surface to the outer surface of the pressure plate and communicating with the pressure chamber are formed between the pair of discharge region vane lower ports, and these ports are connected to the inner surface of the pressure plate. They communicate with each other through a communication groove formed on a side surface, and communicate with each other through a communication hole that communicates the pair of lower ports of the discharge area vane with the pressure chamber, and the communication hole is provided on the pressure chamber side. A vane pump that is closed with a closing member that opens when the temperature exceeds a set temperature.