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Gear pump with built in outer controlled overflow valve

A technology of relief valve and gear pump, applied in the direction of rotary piston pump, pump, rotary piston machine, etc., can solve the problems of complex hydraulic circuit, large space occupation, short service life, etc., to simplify the hydraulic circuit structure and save money. Space, the effect of improving the service life

Inactive Publication Date: 2008-10-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a gear pump with a built-in externally controlled overflow valve in order to solve the problems of complex hydraulic circuit, large space occupation, high power consumption and short service life of the existing gear pump.

Method used

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  • Gear pump with built in outer controlled overflow valve

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0008] Embodiment 1: (see Figures 1 to 3) the gear pump with built-in externally controlled relief valve in this embodiment consists of a front end cover 1, a casing 2, a gear 3, a rear end cover 4, a first seal 5, a first The second seal 14, the third seal 15, the relief valve 6, the one-way valve 7, the input shaft 8, the oil inlet 9 of the gear pump, the oil discharge port 17, the first bearing 10, the second bearing 16, the connection flow Channel 11, the oil discharge channel 12 of the gear pump and the oil inlet channel 18 of the gear pump; a first seal 5 is provided where the front end cover 1 and the casing 2 are matched, and the casing 2 is matched with the rear end cover 4 A second seal 14 is provided at the housing 2, a gear 3 is installed in the housing 2, a third seal 15 is provided where the input shaft 8 of the gear 3 cooperates with the rear end cover 4, and the right end of the gear 3 is provided with a first bearing 10, The left end of the gear 3 is provided ...

specific Embodiment approach 2

[0009] Specific embodiment 2: (see FIGS. 1 to 3 ) the relief valve 6 in this embodiment consists of a relief valve sleeve 6-1, a relief valve spool 6-2, a relief valve spring 6-3, and an adjustment screw 6-4. The spring seat 6-5, the control plunger 6-6 and the nut 6-7 are composed; the nut 6-7 is threadedly connected with the front end cover 1, and the adjusting screw 6-4 and the nut 6-7 The matching parts are threadedly connected, the lower end face of the adjusting screw 6-4 is in contact with the upper end face of the spring seat 6-5, the lower part of the spring seat 6-5 is inserted into the spring ring on the upper part of the relief valve spring 6-3, and the relief valve valve The upper part of the core 6-2 is inserted into the spring ring at the lower part of the relief valve spring 6-3, the lower part of the relief valve slide valve 6-2 is connected with the upper part of the control plunger 6-6, and the relief valve sleeve 6-1 is inside Install control plunger 6-6. ...

specific Embodiment approach 3

[0010] Embodiment 3: The relief valve spring 6-3 in this embodiment is a compression spring. Others are the same as in the second embodiment.

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Abstract

The present invention relates to a gear pump of built-in externally-controlled overflow valve. It is characterized by that a first sealing component is set in the place where its front end cover is fit with shell body, a second sealing component is set in the place where said shell body is fit with its rear end cover, in the shell body interior a gear is mounted, a third sealing component is set in the place where the input shaft of said gear is fit with rear end cover, the left end of said gear is equipped with first bearing, the right end of said gear is equipped with second bearing, in the front end cover interior an overflow valve and an one-way valve are mounted, the oil outlet of said one-way valve is communicated with bottom portion of overflow valve by means of connection flow channel, the oil outlet of gear pump is respectively communicated with oil inlet of overflow valve and oil inlet of one-way valve by means of oil-discharging flow channel, and the oil outlet of said overflow valve is communicated with oil inlet of gear pump by means of oil-feeding flow channel of gear pump.

Description

technical field [0001] The present invention relates to a gear pump. Background technique [0002] Most of the existing gear pumps do not have a built-in relief valve, and the hydraulic system needs to be additionally equipped with a relief valve and a corresponding connecting pipeline, so the hydraulic circuit is complicated and occupies a large space. The existing gear pump with built-in relief valve adopts an internally controlled relief valve. When the circuit needs safety protection or the hydraulic system needs to be pressure-regulated, the relief valve is opened with a high pressure. At this time, the oil supply port of the gear pump is The pressure is very high, and the gear pump consumes a lot of power. At the same time, the high-pressure liquid flow forms an internal circulation inside the gear pump, and the gear pump generates serious heat, which affects the service life of the gear pump. SUMMARY OF THE INVENTION [0003] The invention provides a gear pump with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C2/18
Inventor 李松晶臧增为
Owner HARBIN INST OF TECH