JPS6271391U

JPS6271391U -

Info

Publication number: JPS6271391U
Application number: JP16241785U
Authority: JP
Priority date: 1985-10-22
Filing date: 1985-10-22
Publication date: 1987-05-07

Description

[Brief explanation of the drawing]

第１図〜第７図はこの考案に係るギヤポンプの
実施例を示すものであり、第１図は第４図におけ
る―線に沿つた断面図、第２図および第３図
は要部の拡大断面図で、第２図は滞留した流体を
外部に排出する場合を示し、第３図は同じく吸入
口に戻す場合を示し、第４図はギヤポンプを第５
図における―線に沿つて切断して示す断面図
、第５図、第６図および第７図は、それぞれ第４
図における―線、―線および―線に
沿つた断面図である。第８図〜第１１図は、従来
のギヤポンプを示す図であり、第８図は第９図に
おける―線に沿う断面図で、第４図は相当す
るもの、第９図、第１０図および第１１図は、そ
れぞれ第８図における―線、―線および
―線に沿つた断面図で、それぞれ第５図
、第６図および第７図に相当するものである。１：駆動歯車、２：従動歯車、３：吸入口、４
：吐出口、５：軸、６：軸受、７：ケーシング、
８ａ，８ｂ：側板、９ａ〜９ｃ：空間部、２０：
ギヤポンプ、２１，２１ａ：開放孔、２２：連絡
溝、２３：弁体、２４：連通孔。 Figures 1 to 7 show an embodiment of the gear pump according to this invention. Figure 1 is a sectional view taken along the line - in Figure 4, and Figures 2 and 3 are enlarged views of the main parts. In the cross-sectional views, Fig. 2 shows the case where the accumulated fluid is discharged to the outside, Fig. 3 shows the case where it is returned to the suction port, and Fig. 4 shows the case where the gear pump is connected to the fifth
5, 6 and 7 are cross-sectional views taken along line - in the figure, respectively.
FIG. 3 is a cross-sectional view taken along lines - line, - line, and - line in the figure. 8 to 11 are diagrams showing conventional gear pumps. FIG. 8 is a sectional view taken along the line - in FIG. 9, and FIG. FIG. 11 is a cross-sectional view taken along lines ---, ---, and --- in FIG. 8, respectively, and corresponds to FIG. 5, FIG. 6, and FIG. 7, respectively. 1: Drive gear, 2: Driven gear, 3: Suction port, 4
: Discharge port, 5: Shaft, 6: Bearing, 7: Casing,
8a, 8b: side plate, 9a to 9c: space, 20:
Gear pump, 21, 21a: open hole, 22: communication groove, 23: valve body, 24: communication hole.

Claims

[Scope of utility model registration request]

an open hole bored in an inner wall defining a suction passage and communicating the suction passage with the atmosphere; a communication groove that communicates a space from which the transferred fluid leaks with the open hole; and a fluid that moves within the open hole. The communication groove is arranged such that the communication groove can be connected to the atmosphere and the communication groove is connected to the atmosphere when the open hole is blocked from the communication groove, and the communication groove is connected to the atmosphere. A gear pump characterized in that it is sometimes equipped with a valve body that shuts off the communication groove from the atmosphere.