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Bidirectional gear motor pump

A two-way gear and motor pump technology, which is applied to pumps, pump components, rotary piston pumps, etc., can solve the problems that the gear pump cannot meet customer needs, reduce the service life of the gear pump, and the temperature of the pump body is high, so as to reduce adverse effects, Improve the scope of application and reduce the effect of inventory

Pending Publication Date: 2020-05-01
SHANXI SCENERY MACHINE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The use of the gear pump needs to connect many accessories such as the motor, the base, and the shield. The entire structure is relatively large. Due to the setting of the pressure relief channel of the gear pump, the oil inlet and outlet of the gear pump are pre-assembled before leaving the factory. Generally, it can only be used normally when the gear shaft rotates in one direction, such as forward rotation, but it cannot be used normally when it is in the opposite direction, that is, reverse rotation. This makes the gear pump unable to meet the needs of customers with different oil inlet and outlet positions. , Therefore, the majority of gear pump manufacturers are committed to producing a double-steering gear pump that can rotate in both directions and work normally.
[0003] The dual-steering gear pumps existing in the prior art can be divided into the following two types. The displacement of a gear pump is relatively large, usually 3-160ml / r, but the pressure is low, usually less than 21MPa. The pressure is high, the pressure can reach 35MPa, but the displacement is small, usually less than 10ml / r. So far, there is no double-steering gear pump that can meet the two needs of large displacement and high pressure at the same time.
In addition, the above-mentioned double-steering gear pump often adopts the internal circulation of the pump body for oil circuit circulation. When the gear pump is working, the temperature of the pump body will be high due to poor heat dissipation of the hydraulic oil, which will reduce the service life of the gear pump.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] like Figure 1-Figure 4 As shown, it is a schematic diagram of each structure of the first structure of the bidirectional gear motor pump of the present invention. It can be seen from the figure that the bidirectional gear motor pump of this embodiment includes: a pinion 1 with an external gear; a pump body sleeved on the pinion 1 10; the support cover 6 that is sleeved on the pinion 1 and is located at the front end of the pump body 10 and the flange front cover 5 located at the front end of the support cover 6, the flange front cover 5 and the support cover 6 form a front cover, and the front end of the pinion 1 extends Out of flange front cover 5; rear cover 14 installed at the rear end of pump body 10; shaft head oil seal 2, elastic retaining ring 3, O-ring 4 installed on the inner side of flange front cover 5, installed on the The sliding bearing 17 extending into the rear end of the rear cover 14; the inner gear 9 meshing with the external gear of the pinion 1, wh...

Embodiment 2

[0126] like Figure 37 As shown, this embodiment is a schematic structural diagram of a bidirectional gear motor pump. The difference from Embodiment 1 is that the fluid machine of this embodiment adopts a control back cover with a control function, that is, the control back cover of this embodiment is provided with a A pair of relief valves and a pair of one-way valves enable the fluid machine of this embodiment to be applied to a closed hydraulic system.

[0127] Specifically, as Figures 23-25 As shown, the control back cover of this embodiment includes a circular back cover body and a first relief valve 1420, a second relief valve 1419, a first check valve 1421, a second check valve 1421, a second check valve 1421 and a second check valve 1420, which are installed on the back cover body Valve 1418. Both the relief valve and the check valve adopt the cartridge relief valve and the cartridge check valve in the prior art. Wherein, the first relief valve 1420 can be a pilot...

Embodiment 3

[0137] The bidirectional gear motor pump of this embodiment can adopt the structure of Embodiment 1, and on the basis of Embodiment 1, a heat dissipation groove for heat dissipation is provided on the rear surface of the rear cover 14, such as Figure 38 As shown, the heat dissipation groove includes a plurality of longitudinal grooves and a plurality of transverse grooves, and the plurality of longitudinal grooves and the plurality of transverse grooves intersect with each other.

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PUM

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Abstract

The invention discloses a bidirectional gear motor pump. The bidirectional gear motor pump comprises a gear shaft, a front cover, a pump body, a rear cover and an inner gear ring and further comprisesan axial sealing assembly with a pair of side plates, and a leakage oil channel used for making hydraulic oil warmed up in the pump body circularly flow towards the outside of the pump body. The leakage oil channel comprises a first channel, a second channel, a third leakage channel and a fourth channel, wherein the first channel is defined by the gap among the front side plate in the pair of side plates, the front cover and the gear shaft; the second channel is defined by the gap among the rear side plate in the pair of side plate, the rear cover and the gear shaft; the third leakage channelis formed in the gear shaft, an oil inlet of the third leakage channel communicates with the first channel, and an oil outlet of the third leakage channel communicates with the second channel; and the fourth channel is formed in the rear cover, and an oil inlet of the fourth channel communicates with the second channel and the third leakage channel. The bidirectional gear motor pump can work normally under the forward rotating and reverse rotating situations, and is large in flow and high in pressure, warmed-up hydraulic oil can be leaked outside the pump body, heat dissipating of the pump body is facilitated, and the service life of the gear motor pump is prolonged.

Description

technical field [0001] The invention relates to the technical field of hydraulic engineering, in particular to a bidirectional gear motor pump. Background technique [0002] The use of the gear pump needs to connect many accessories such as motor, base, shield, etc. The whole structure is relatively large. Due to the problem of setting the pressure relief channel of the gear pump, the oil inlet and outlet of the gear pump are pre-assembled before leaving the factory. Usually, it can only be used normally when the gear shaft rotates in one direction, such as forward rotation, and can not be used normally when it rotates in the opposite direction, that is, reverse rotation, which makes the gear pump unable to meet the needs of customers with different inlet and outlet positions. Therefore, the majority of gear pump manufacturers are committed to producing a dual-steering gear pump that can rotate in both directions and work normally. [0003] The dual steering gear pumps exis...

Claims

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Application Information

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IPC IPC(8): F04C2/10F04C15/00F04C15/06
CPCF04C2/101F04C2/102F04C15/00F04C15/0019F04C15/0026F04C15/0096F04C15/06F04C15/064F04C2240/30
Inventor 王全锁王保国郑向军杨太康
Owner SHANXI SCENERY MACHINE MFG