CN2272500Y

CN2272500Y - Dual-direction rotation gear oil pump

Info

Publication number: CN2272500Y
Application number: CN 96223435
Authority: CN
Inventors: 段其福
Original assignee: HEFEI HYDRAULIC ELEMENT GEN FACTORY
Current assignee: HEFEI HYDRAULIC ELEMENT GEN FACTORY
Priority date: 1996-08-13
Filing date: 1996-08-13
Publication date: 1998-01-14
Anticipated expiration: 2006-08-13

Abstract

The utility model relates to a bidirection rotation gear oil pump which overcomes the defects of the prior art that the rotation gear oil pumps can only be rotated towards one direction, the application range is small, and the limitation is large. The utility model is formed by that a pair of check valves are arranged in a pump body, the oil return side openings of the check valves are respectively communicated with one of an oil inlet, or an oil outlet, and the oil return side openings are both communicated with an oil leakage hole. The utility model can realize the bidirection rotation of gear oil pumps, which causes reversing valves to be saved in certain hydraulic systems, and load bidirectional movement is realized. The utility model has the advantages of good integrity, reliable work and convenient installation. The utility model is convenient for being matched with various hydraulic systems to be used.

Description

Two-way swing pinion oil pump

The utility model is a kind of two-way swing pinion oil pump, and it belongs to the formula rotary piston pump field that is meshing with each other, and particularly relates to the pump of being with similar tooth form.Be equipped with intermeshing driving gear and driven gear in its pump housing, have filler opening, oil outlet on the pump housing of said driving and driven gear both sides, become the leakage oilhole in a loop to run through the two axial ends of driving and driven gear respectively with the oil-feed district.

In the hydraulic pressure industry, people are in order to obtain middle and high hydraulic power, and the multiselect gear oil pump is as widely used now.Its formation is to be built-in with a pair of pitch wheel at its pump housing, have into and out of hydraulic fluid port on this pump housing the gear both sides, wherein the oil-feed district with run through this leakage oilhole and be communicated with the gear two axial ends.Deficiency is that this gear oil pump only can unidirectionally rotate, and being not easy to use at some has in the hydraulic system of two-way load, so its applicable scope greatly reduces, narrow limitation is very big.For addressing this problem, also have the leakage oilhole is picked out the pump housing, as be applied to the double-direction gearpump of lubricated occasion, but this there is the integrity of pump poor again, installs and uses the deficiency of equal inconvenience.

The purpose of this utility model is to avoid above-mentioned deficiency of the prior art and a kind of good integrity, two-way swing pinion oil pump easy to use is provided.

The purpose of this utility model can reach by following measure: a pair of one-way valve is set in the pump housing, this to two oil return side mouths of one-way valve respectively with the pump housing on filler opening or oil outlet in one of be connected, oil-feed side mouth all with leak oilhole and be connected.Like this, no matter gear pump still is rotated counterclockwise clockwise, because the automatic reverse effect of this a pair of one-way valve, and make the oil that leaks in the oilhole all can flow back to the oil-feed district through one-way valve, also promptly flow back to low voltage side.

The purpose of this utility model can also reach by following measure: the structure of one-way valve is, has oil-feed side mouth and oil return side mouth on valve pocket, places an end and the chamber wall of the spring in the valve pocket to offset, the other end offsets through steel ball and oil-feed side mouth.When the oil pressure at oil-feed side mouth place during, leak oil and can flow back to low voltage side through this one-way valve greater than spring and oil return side mouth oil pressure sum.

The utility model has following advantage compared to existing technology:

1. can realize the two-way rotation of gear oil pump, make and in some hydraulic system, can save selector valve and realize the bidirectional-movement of load;

2. simple in structure, the reliable operation of one-way valve neither can influence the volumetric efficiency of pump, and good manufacturability again, are suitable for producing in batches;

3. the good integrity of gear pump is convenient to and the supporting use of various hydraulic systems, installs also very convenient.

Describe concrete structure of the present utility model and working condition in detail below in conjunction with accompanying drawing.

Fig. 1 is a kind of basic structure generalized section of the present utility model.

Fig. 2 is that the A-A of Fig. 1 is to generalized section.

Fig. 3 is that the B-B of Fig. 2 is to generalized section.

With reference to Fig. 1, Fig. 2 and Fig. 3, be equipped with a pair of intermeshing driving gear 4 and driven gear 5 in the pump housing 1, have filler opening 2 and oil outlet 3 on this pump housing 1 to driving and driven gear (4,5) both sides.In the rear end cover of the pump housing 1, be equipped with the one-way valve of a pair of mutual butt joint, this to one-way valve by at its valve pocket (91,92) have oil-feed side mouth 11 and oil return side mouth (101 on, 102), and place valve pocket (91,92) end of Nei spring (81,82) and chamber wall offset, the other end through steel ball (71,72) and oil-feed side mouth 11 offset constitute.This oil return side mouth 101 to one-way valve is connected with filler opening 2, oil return side mouth 102 is connected with oil outlet 3.Oil-feed side mouth 11 all is connected with leakage oilhole 6.

When the driving gear 4 of pump turns clockwise, the oil pressure of oil outlet 3 one sides raises gradually and forms the zone of high pressure, and through oil outlet 3 discharges, the oil pressure that leaks this moment in the oilhole 6 also progressively raises thereupon, when its pressure is enough to overcome the elastic force of spring 81, enter valve pocket 91 with regard to pushing the steel ball 71 that props up oil-feed side mouth 11 open, and then be back into filler opening 2 places through oil return side mouth 101.When the driving gear 4 of pump was rotated counterclockwise, its working mechanism was same as described above.

Claims

1. two-way swing pinion oil pump, be equipped with intermeshing driving gear (4) and driven gear (5) in the pump housing (1), said master, driven gear (4,5) have filler opening (2) on the pump housing of both sides (1), oil outlet (3), become the leakage oilhole (6) in a loop to run through main respectively with the oil-feed district, driven gear (4,5) two axial ends, it is characterized in that also being equipped with a pair of one-way valve in the pump housing (1), the oil return side mouth (101,102) of described one-way valve respectively with filler opening (2) or oil outlet (3) in one of be connected, oil-feed side mouth (11) all is connected with leakage oilhole (6).

2. oil pump according to claim 1, it is characterized in that one-way valve is by at its valve pocket (91,92) have oil-feed side mouth (11) and oil return side mouth (101 on, 102), place valve pocket (91,92) end of Nei spring (81,82) and chamber wall offset, the other end through steel ball (71,72) and oil-feed side mouth (11) offset constitute.