JPH01125819U

JPH01125819U -

Info

Publication number: JPH01125819U
Application number: JP2112788U
Authority: JP
Priority date: 1988-02-22
Filing date: 1988-02-22
Publication date: 1989-08-28
Anticipated expiration: 2003-02-22
Also published as: JPH0721863Y2

Description

[Brief explanation of drawings]

図面は本考案の実施例を示すものであつて、そ
の第１図は本考案の第１実施例の要部断面図、第
２図は第１図の一部切除した要部斜視図、第３図
は本考案の別の第１実施例の要部断面図、第４図
は本考案の第２実施例の要部断面図、第５図は第
４図―矢視断面図、第６図は本考案の第３実
施例の要部断面図、第７図は第６図―矢視断
面図、第８図は本考案の別の第３実施例の要部断
面図、第９図は第８図の要部斜視図、第１０図は
第８図―矢視断面図、第１１図は本考案の第
４実施例の要部断面図、第１２図は本考案の作用
状態を示す断面図、第１３図は従来公知のウオー
ターポンプの漏れ蒸気排出構造の断面図である。Ａ……ケーシング、Ｂ……メカニカルシール、
１……軸受室、２……インペラ室、４……ポンプ
軸、４ａ……排出軸穴、４ｂ……吸入口、ｔ……
接触部、６……ベルト車、６ａ，１０ａ……ボス
部、６ｂ，１０ｂ……ドレン孔、１０……羽根車
、１１……流入孔。 The drawings show an embodiment of the present invention, in which Fig. 1 is a sectional view of the main part of the first embodiment of the invention, Fig. 2 is a perspective view of the main part with a part cut away from Fig. 1, and Fig. 3 is a sectional view of a main part of another first embodiment of the present invention, FIG. 4 is a sectional view of a main part of a second embodiment of the present invention, FIG. 5 is a sectional view taken in the direction of the arrows in FIG. The figure is a cross-sectional view of the main part of the third embodiment of the present invention, FIG. 7 is a cross-sectional view of the main part of another third embodiment of the present invention, FIG. 7 is a cross-sectional view of the main part of another third embodiment of the present invention, FIG. 8 is a perspective view of the main part of FIG. 8, FIG. 10 is a sectional view of the main part of the fourth embodiment of the present invention, and FIG. 12 is a sectional view of the main part of the fourth embodiment of the present invention. The sectional view shown in FIG. 13 is a sectional view of a leakage steam exhaust structure of a conventionally known water pump. A...Casing, B...Mechanical seal,
1... Bearing chamber, 2... Impeller chamber, 4... Pump shaft, 4a... Discharge shaft hole, 4b... Suction port, t...
Contact portion, 6... Belt wheel, 6a, 10a... Boss portion, 6b, 10b... Drain hole, 10... Impeller, 11... Inflow hole.

Claims

[Scope of Claim for Utility Model Registration] (1) A pump shaft that is rotatably supported in the bearing chamber of a casing consisting of a bearing chamber and an impeller chamber, has a discharge shaft hole that is closed only on the impeller chamber side, and a mechanical pump that is provided in the bearing chamber. A leakage steam exhaust structure for a water pump, characterized in that an inlet is formed in the pump shaft directly below the contact portion of the seal, and the inlet is communicated with the exhaust shaft hole. (2) The pump shaft is supported in the bearing chamber of the casing, which consists of a bearing chamber and an impeller chamber, with a discharge shaft hole that is closed only on the impeller chamber side, and the pump shaft is directly below the contact point of the mechanical seal provided in the bearing chamber. an inlet is formed in the casing, the inlet is communicated with the discharge shaft hole, an impeller is fixed to the end of the pump shaft protruding to the outside of the casing, and a drain hole is formed radially in the boss of the impeller. A leakage steam exhaust structure for a water pump characterized by communicating the exhaust shaft hole in the pump shaft with the exhaust shaft hole in the pump shaft. (3) The pump shaft is supported in the bearing chamber of a casing consisting of a bearing chamber and an impeller chamber, and a discharge shaft hole is formed that closes only the impeller chamber side, and the pump shaft is directly below the contact point of the mechanical seal provided in the bearing chamber. an inlet is formed in the casing, the inlet is communicated with the discharge shaft hole, a belt pulley is fixed to the end of the pump shaft protruding to the outside of the casing, and a drain hole is formed radially in the boss part of the belt pulley. A leakage steam exhaust structure for a water pump characterized by communicating the exhaust shaft hole in the pump shaft with the exhaust shaft hole in the pump shaft. (4) The pump shaft is supported in the bearing chamber of a casing consisting of a bearing chamber and an impeller chamber, and a discharge shaft hole is formed with only the impeller chamber side closed, and the pump shaft is located directly below the contact point of the mechanical seal provided in the bearing chamber. A suction port is formed in the pump shaft, and the suction port is connected to the discharge shaft hole, and a drain hole is formed radially in the boss portion of the belt pulley fixed to the end of the pump shaft protruding outside the casing. A leakage steam discharge structure for a water pump characterized by communicating a discharge shaft hole and communicating an outside air inflow hole drilled in a casing with an intake port.