JPH0335283U

JPH0335283U -

Info

Publication number: JPH0335283U
Application number: JP9606589U
Authority: JP
Priority date: 1989-08-18
Filing date: 1989-08-18
Publication date: 1991-04-05

Description

[Brief explanation of the drawing]

第１図は本考案によるタンデムポンプの第１の
実施例を示す断面図、第２図は同第２の実施例を
示す断面図、第３図は同第３の実施例を示す断面
図、第４図は従来のタンデムポンプの一例を示す
断面図である。１……タンデムポンプ、２……フロントボデイ
、３……センターボデイ、４……リヤカバー、５
……ハウジング、６，７……ポンプユニツト、８
……回転軸、１５ａ，１５ｂ……吸入油路、１６
……仕切壁、１７……連通油路、１８ａ，１８ｂ
……高圧室、２５，２９，３２……〓間、２７，
３０，３３……シール。 FIG. 1 is a sectional view showing a first embodiment of the tandem pump according to the present invention, FIG. 2 is a sectional view showing the second embodiment, and FIG. 3 is a sectional view showing the third embodiment. FIG. 4 is a sectional view showing an example of a conventional tandem pump. 1... Tandem pump, 2... Front body, 3... Center body, 4... Rear cover, 5
... Housing, 6, 7 ... Pump unit, 8
... Rotating shaft, 15a, 15b ... Suction oil path, 16
...Partition wall, 17...Communication oil passage, 18a, 18b
...hyperbaric chamber, 25, 29, 32...〓between, 27,
30, 33... Seal.

Claims

[Scope of utility model registration request]

Two pump units arranged in series on the axis so as to share a rotating shaft are housed in a housing consisting of a front body, a center body, and a rear cover, and a partition wall is provided in the center of the center body. In a tandem pump, a high pressure chamber is formed for each pump unit on both sides of the pump unit, and a communication oil passage is provided in the partition wall to communicate the suction oil passage of each pump unit. A tandem pump characterized in that a seal is provided to prevent leakage of high-pressure oil from a high-pressure chamber, and a space is provided between the circumferential surface of the rotating shaft and the inner surface of the shaft hole to communicate with the communicating oil passage.