CN202789512U - Duplicate gear oil pump for axial clearance compensation of side plate - Google Patents
Duplicate gear oil pump for axial clearance compensation of side plate Download PDFInfo
- Publication number
- CN202789512U CN202789512U CN201220425644.1U CN201220425644U CN202789512U CN 202789512 U CN202789512 U CN 202789512U CN 201220425644 U CN201220425644 U CN 201220425644U CN 202789512 U CN202789512 U CN 202789512U
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- CN
- China
- Prior art keywords
- side plate
- gear
- pump
- axial clearance
- clearance compensation
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Abstract
The utility model discloses a duplicate gear oil pump for axial clearance compensation of a side plate. The duplicate gear oil pump comprises a pump body, a front cover and a rear cover, wherein the front cover and the rear cover are fixed at two ends of the pump body respectively; a high-pressure driving gear and a high-pressure driven gear are arranged in the rear cover; a low-pressure driving gear and a low-pressure driven gear are arranged in the pump body; a driving gear shaft and a driven gear shaft are mounted in axle sleeves of the front cover and the rear cover; and floating side plates are arranged on two sides of the high-pressure driving gear and those of the high-pressure driven gear. The floating side plates are adopted to realize the purposes of axial clearance compensation and pressure balancing; due to axial clearance compensation, axial stress can be reduced by 60 percent; the heating possibility of the pump as well as the noise is low; pressure balancing grooves are formed in the floating side plates, so as to greatly reduce the radial force of a bearing, and reduce the load of the bearing by 30 percent; popularization is realized; the energy-saving effect is ideal; and the service life is long.
Description
Technical field
The utility model relates to the gear oil pump technical field, especially relates to a kind of duplicate gear oil pump of side plate axial clearance compensation.
Background technique
Duplex gear pump is a kind of of gear pump, is to rely on formed swept volume between the pump housing and two groups of engaging gears to change and movement is carried liquid or made it the rotary pump of supercharging.Have two groups of gears in the pump housing of duplex gear pump, two groups of gears and the pump housing form the space of two sealings, be respectively suction chamber and discharge side, when gear rotates, the space of the side that is out of gear (being suction chamber) volume is large from little change, forms vacuum liquid is sucked, and liquid rotates and enter discharge side at two between cog of gear with gear, the liquid of getting rid of the chamber is extruded, and finishes the working procedure of gear pump with this.
Existing duplex gear pump is when assembling, the relative axial position random arrangement of two driving gears of its inside, the liquid of two driving gear between cog enters in the discharge side of the pump housing simultaneously, this just so that the fluid pressure moment in the pump housing discharge side become large or diminish, thereby make gear pump have very large discharge pulse, the not only instability of flow of gear pump, difficult control, and make gear pump have sizable operating noise, the service behaviour of gear pump is not good.Again because front and rear covers, middle pump body all are ductile iron materials, the fixed interval (FI) structure, although can be high temperature resistant, working pressure is not high, and the volumetric efficiency of pump is lower, and pump easily produces heating.
Therefore, the appearance of the duplicate gear oil pump of the side plate axial clearance compensation of low, the long service life of a kind of noise is necessary.
The model utility content
The utility model is to provide a kind of duplicate gear oil pump of side plate axial clearance compensation for solving the problems of the technologies described above, the advantages such as noise is low, long service life that it has.
The technical problem that the utility model solves realizes by the following technical solutions:
A kind of duplicate gear oil pump of side plate axial clearance compensation comprises the pump housing, protecgulum, bonnet, and described protecgulum and bonnet are individually fixed in the two ends of the described pump housing;
In described bonnet, be provided with high pressure driving gear, high pressure driven gear, be provided with low pressure driving gear and low pressure driven gear in the described pump housing, described high pressure driving gear and low pressure driving gear are separately fixed on the driving gear shaft, and described high pressure driven gear and low pressure driven gear are separately fixed on the driven gear shaft;
Described high pressure driving gear is meshed with the high pressure driven gear, and described low pressure driving gear is meshed with the low pressure driven gear;
Described driving gear shaft and driven gear shaft are installed in the axle sleeve of protecgulum and bonnet;
Both sides at described high pressure driving gear and high pressure driven gear are provided with floating side plate.
As preferred technological scheme, be provided with one-way valve at the middle part of the described pump housing.
As preferred technological scheme, described floating side plate is provided with relief groove.
As preferred technological scheme, described relief groove is two.
As preferred technological scheme, described relief groove is annular groove.
As preferred technological scheme, described floating side plate is formed by ferrous based powder metallurgical die casting or metal sintering.
As preferred technological scheme, be provided with relief valve between the described pump housing and the protecgulum, described relief valve is connected with the control spool.
As preferred technological scheme, described axle sleeve is the DU axle sleeve.
As preferred technological scheme, described bonnet and the pump housing adopt aluminum alloy material.
Working principle and operation instruction: the utility model can be according to the actual demand of when work, single pump output in the time of can realizing high pressure, double pump output during low pressure.When system is subjected to low load (pressure is lower than the setting of relief valve), one-way valve is opened, and high-pressure gear pump and low pressure gear pump be fuel feeding simultaneously, and output flow is large, and hydraulic system realizes fast feed or rollback; When system is subjected to high capacity (pressure is higher than the setting of relief valve), the control spool is opened relief valve, the flow of low pressure gear pump output returns the filler opening of duplex gear pump through the relief valve off-load, has realized interior circulation, thereby has avoided the duplex gear pump inlet port to inhale empty situation.This moment, closed check valve only had the high-pressure gear POF.Compare with the pump of firm discharge, this duplex system uses power of motor can save 35%.By at the front pump of duplex gear pump the control spool being installed, realizing pump output high pressure, low pressure, and when the output high pressure, can improve the oil absorption of pump.
The beneficial effect that the utlity model has is:
(1) gear oil pump of the present utility model adopts floating side plate, reaching axial clearance compensation and pressure balanced purpose, and axial clearance compensation, axially loaded can reduce 60%, and pump is difficult for heating, and noise is little;
(2) have relief groove on the floating side plate, significantly reduced the radial force of bearing, bearing load can reduce 30%, and the life-span can prolong nearly 3 times, has improved the combination property of pump;
(3) compare with the pump of firm discharge, this duplex system uses power of motor can save 35%, be suitable for promoting, and be desirable energy-conserving product;
(4) gear oil pump long service life of the present utility model.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the utility model duplicate gear oil pump;
Fig. 2 be Fig. 1 A-A to cross-sectional view;
Fig. 3 be Fig. 1 B-B to cross-sectional view;
Fig. 4 is the structural representation of the floating side plate of the utility model duplicate gear oil pump;
The picture in picture mark:
The 1-pump housing, 2-protecgulum, 3-bonnet, 4-high pressure driving gear, 5-high pressure driven gear, 6-low pressure driving gear, 7-low pressure driven gear, 8-driving gear shaft, 9-driven gear shaft, 10-axle sleeve, 11-oil outlet, 12-one-way valve, 13-control spool, 14-relief valve, 15-floating side plate, 16-relief groove, 17-oil inlet pipe.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technological scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Shown in Fig. 1-3, a kind of duplicate gear oil pump of side plate axial clearance compensation comprises the pump housing 1, protecgulum 2, bonnet 3; Protecgulum 2 and bonnet 3 are individually fixed in the two ends of the pump housing 1; Be provided with oil inlet pipe 17 at the pump housing 1, in bonnet 3, be provided with high pressure driving gear 4, high pressure driven gear 5, in the pump housing 1, be provided with low pressure driving gear 6 and low pressure driven gear 7; High pressure driving gear 4 and low pressure driving gear 6 are separately fixed on the driving gear shaft 8, and high pressure driven gear 5 and low pressure driven gear 7 are separately fixed on the driven gear shaft 9; Driving gear shaft 8 and driven gear shaft 9 are installed in the axle sleeve 10 of protecgulum 2 and bonnet 3, offer oil outlet 11 at bonnet 3, be provided with one-way valve 12 at the middle part of the pump housing 1, be provided with relief valve 14 between the pump housing 1 and the protecgulum 2, relief valve 14 is connected with control spool 13.Both sides at high pressure driving gear 4 and high pressure driven gear 5 are provided with floating side plate 15.Reaching axial clearance compensation and pressure balanced purpose, and axial clearance compensation, axially loaded can reduce 60%, and pump is difficult for heating, and noise is little.Bonnet 3 and the pump housing 1 can adopt aluminum alloy material.Floating side plate 15 can be formed by ferrous based powder metallurgical die casting or metal sintering.These materials all are the conventional materials on the market, and the utility model does not have special requirement to material.
As the further improved technological scheme of the utility model, with reference to shown in Figure 4, floating side plate 15 is provided with two relief grooves 16, and relief groove 16 is annular groove.Have relief groove 16 on the floating side plate 15, significantly reduced the radial force of bearing, bearing load can reduce 30%, and the life-span can prolong nearly 3 times, has improved the combination property of pump.Axle sleeve 10 can adopt the DU axle sleeve, and wear-resisting property is good, and friction factor is little, long service life.
Working principle and operation instruction: the utility model is provided with high pressure driving gear 4, high pressure driven gear 5 in bonnet 3; In the pump housing 1, be provided with low pressure driving gear 6 and low pressure driven gear 7, formed two separate pump housings, be i.e. high-pressure gear pump and low pressure gear pump, actual demand during according to work, single pump output in the time of can realizing high pressure, double pump output during low pressure.When system is subjected to low load (pressure is lower than the setting of relief valve), one-way valve is opened, and high-pressure gear pump and low pressure gear pump be fuel feeding simultaneously, and output flow is large, and hydraulic system realizes fast feed or rollback; When system is subjected to high capacity (pressure is higher than the setting of relief valve), the control spool is opened relief valve, the flow of low pressure gear pump output returns the filler opening of duplex gear pump through the relief valve off-load, has realized interior circulation, thereby has avoided the duplex gear pump inlet port to inhale empty situation.This moment, closed check valve only had the high-pressure gear POF.Compare with the pump of firm discharge, this duplex system uses power of motor can save 35%.By at the front pump of duplex gear pump the control spool being installed, realizing pump output high pressure, low pressure, and when the output high pressure, can improve the oil absorption of pump.
More than show and described basic principle of the present utility model and major character and advantage of the present utility model.Those skilled in the art should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (8)
1. the duplicate gear oil pump of a side plate axial clearance compensation comprises the pump housing, protecgulum, bonnet, and described protecgulum and bonnet are individually fixed in the two ends of the described pump housing; It is characterized in that,
In described bonnet, be provided with high pressure driving gear, high pressure driven gear, be provided with low pressure driving gear and low pressure driven gear in the described pump housing, described high pressure driving gear and low pressure driving gear are separately fixed on the driving gear shaft, and described high pressure driven gear and low pressure driven gear are separately fixed on the driven gear shaft;
Described high pressure driving gear is meshed with the high pressure driven gear, and described low pressure driving gear is meshed with the low pressure driven gear;
Described driving gear shaft and driven gear shaft are installed in the axle sleeve of protecgulum and bonnet;
Both sides at described high pressure driving gear and high pressure driven gear are provided with floating side plate.
2. the duplicate gear oil pump of a kind of side plate axial clearance compensation according to claim 1 is characterized in that, is provided with one-way valve at the middle part of the described pump housing, is provided with relief valve between the described pump housing and the protecgulum, and described relief valve is connected with the control spool.
3. the duplicate gear oil pump of a kind of side plate axial clearance compensation according to claim 1 is characterized in that, described floating side plate is provided with relief groove.
4. the duplicate gear oil pump of a kind of side plate axial clearance compensation according to claim 3 is characterized in that, described compensating groove is two.
5. the duplicate gear oil pump of a kind of side plate axial clearance compensation according to claim 3 is characterized in that, described relief groove is annular groove.
6. the duplicate gear oil pump of a kind of side plate axial clearance compensation according to claim 1 is characterized in that, described floating side plate is formed by ferrous based powder metallurgical die casting or metal sintering.
7. the duplicate gear oil pump of a kind of side plate axial clearance compensation according to claim 1 is characterized in that, described axle sleeve is the DU axle sleeve.
8. the duplicate gear oil pump of a kind of side plate axial clearance compensation according to claim 1 is characterized in that, described bonnet and the pump housing adopt aluminum alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220425644.1U CN202789512U (en) | 2012-08-24 | 2012-08-24 | Duplicate gear oil pump for axial clearance compensation of side plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220425644.1U CN202789512U (en) | 2012-08-24 | 2012-08-24 | Duplicate gear oil pump for axial clearance compensation of side plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202789512U true CN202789512U (en) | 2013-03-13 |
Family
ID=47816782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220425644.1U Expired - Lifetime CN202789512U (en) | 2012-08-24 | 2012-08-24 | Duplicate gear oil pump for axial clearance compensation of side plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202789512U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629110A (en) * | 2012-08-24 | 2014-03-12 | 无锡市东方液压件制造有限公司 | Dual-gear oil pump compensating axial clearance by side plates |
-
2012
- 2012-08-24 CN CN201220425644.1U patent/CN202789512U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629110A (en) * | 2012-08-24 | 2014-03-12 | 无锡市东方液压件制造有限公司 | Dual-gear oil pump compensating axial clearance by side plates |
| CN103629110B (en) * | 2012-08-24 | 2016-04-13 | 无锡市东方液压件制造有限公司 | A kind of double-gear oil pump of side plate axial clearance compensation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200426 Address after: 214000 No.31, Fengfeng Road, Huishan District, Wuxi City, Jiangsu Province Patentee after: WUXI DONGYE MACHINERY MANUFACTURING Co.,Ltd. Address before: 214000, No. 8, D District, tin Dong private economic Park, Beitang District, Jiangsu, Wuxi Patentee before: WUXI EAST HYDRAULIC COMPONENT MANUFACTURE Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
|
| CX01 | Expiry of patent term |