CN102650281A - Dual-gear oil pump - Google Patents
Dual-gear oil pump Download PDFInfo
- Publication number
- CN102650281A CN102650281A CN201210160520XA CN201210160520A CN102650281A CN 102650281 A CN102650281 A CN 102650281A CN 201210160520X A CN201210160520X A CN 201210160520XA CN 201210160520 A CN201210160520 A CN 201210160520A CN 102650281 A CN102650281 A CN 102650281A
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- gear
- oil pump
- pump housing
- bonnet
- gears
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- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention discloses a dual-gear oil pump, wherein gear shafts are arranged in a cavity of an oil pump body, and gear sleeves are sleeved on the gear shafts; the oil pump body comprises a front cover, a front pump body, a connection plate, side plates, a rear pump body and a rear cover, and the side plates are positioned in the cavities of the front pump body and the rear pump body; the gear shafts respectively comprise a drive gear shaft and a driven gear shaft; gears respectively comprise a front drive gear, a rear drive gear, a front driven gear and a rear driven gear; the front drive gears are meshed with the front driven gears, and the two side plates are respectively positioned at the two sides of the front drive gears and the front driven gears; and the rear drive gears are meshed with the rear driven gears, and the other two sides plates are respectively positioned at the two sides of the rear drive gears and the rear driven gears. The dual-gear oil pump has the advantages that the position precisions of gear holes and spindle holes can be ensured, the stress balance of the gears is realized, the bearing and shock-resistance capabilities of the gear oil pump are improved, the starting torque of the gear oil pump and heat which is produced by the friction among between the gears and the side plates are reduced and the like.
Description
Technical field
The present invention relates to a kind of duplicate gear oil pump.
Background technique
Concerned countries standard code according to the mining industry; The gear oil pump of using in underground work does not allow to adopt aluminum alloy material to make; To prevent that aluminium, magnesium dust that gear oil pump when work inevitably produce from causing accident of mine disaster; In the prior art, duplicate gear oil pump forward and backward lid, joining plate and the pump housing as shown in Figure 9 generally all adopts aluminum alloy material, can not satisfy the requirement of explosion proof of mining industry.
In the prior art, be to position connection between each component through two locating studs, as shown in Figure 9; Existing problem is processing during positioning pin hole on the both ends of the surface of the preceding pump housing, the back pump housing; Coaxality and position accuracy be difficult to guarantee, thereby spindle hole and the afterwards gear hole on the pump housing and the positional accuracy of the spindle hole on the joining plate on the gear hole on the pump housing and the protecgulum before being difficult to guarantee, increased the radial force of preceding driving gear and rear drive gear thus; Reduced the working life of gear oil pump; Reduce product performance, for each component profile of processing two positioning pin holes is big, increased weight and cost simultaneously.
In the prior art, side plate all be axially with the radial symmetric formula, the surface is not carried out activation and coating and is handled, when gear oil pump bore pressure and impacts, yielding, the wearing and tearing of side plate caused the gear oil pump inefficacy, influenced gear oil pump working life.
In the prior art, oil inlet and outlet generally all is arranged on the pump housing, and the hydraulic oil direction that flows is that diametric(al) along gear directly gets into the pump housing gear train is caused very big impact, influences the working life of gear oil pump.
Summary of the invention
The present invention is the deficiency that exists in the above-mentioned prior art for avoiding, and a kind of duplicate gear oil pump is provided, with positional accuracy, the stress balance of realizing gear that guarantees gear hole and spindle hole, the working life that increases gear oil pump.
The present invention adopts following technological scheme for the technical solution problem.
Duplicate gear oil pump, its structural feature are to comprise oil pump body, gear shaft and gear; Said gear shaft is located among the said oil pump body inner chamber, and said geared sleeve is located on the said gear shaft; Said oil pump body comprises protecgulum, the preceding pump housing, joining plate, side plate, the back pump housing and bonnet, and said protecgulum, the preceding pump housing, joining plate, the back pump housing and bonnet set gradually from left to right, and said side plate is positioned among the inner chamber of the preceding pump housing and the back pump housing; Said gear shaft comprises driving gear shaft and driven gear shaft; Said gear comprises preceding driving gear, rear drive gear, preceding driven gear and back driven gear; Driving gear and preceding driven gear are meshed before said, and two side plates lay respectively at the both sides of said preceding driving gear and preceding driven gear; Said rear drive gear is meshed with the back driven gear, and other two side plates lay respectively at the both sides of said rear drive gear and back driven gear;
On the said protecgulum right side, said before on the left side and right side of the pump housing, on the left side and right side of said joining plate, be provided with four positioning holes respectively on the left side of the said back pump housing and the right side and on the left side of said bonnet;
Filler opening and oil outlet are set on said bonnet, are provided with the bonnet oil duct in the said bonnet; , said joining plate is provided with filler opening and oil outlet, is provided with the joining plate oil duct in the said joining plate.
The structural feature of duplicate gear oil pump of the present invention also is:
On the thickness direction of said side plate, be provided with the axis hole that penetrates said side plate; The outer circumferential face of said side plate upper end portion and underpart is the cylndrical surface, and left side, said cylndrical surface radius R 1 is bigger than right side, cylndrical surface radius R 2; Be coated with wear resistant coating on the said side plate end faces of both sides, the thickness of said wear resistant coating is 0.02mm～0.04mm.
Compared with present technology, beneficial effect of the present invention is embodied in:
1, the present invention adopts cast iron materials, has satisfied the explosion-proof demand of mining industry, makes its application area more extensive, has promoted the competitive capacity of product.
2, adopt the anti-displaceable structure in four holes, broken through two traditional locating pin structures, effectively guaranteed the positional accuracy of gear hole and spindle hole; It is minimum that the suffered radial force of driving gear is reduced to, and increased the working life of gear oil pump, enhances product performance; Simultaneously under the situation of high-mechanic that guarantees gear oil pump and impact resistance; Also make the boundary dimension of gear oil pump more exquisite, effectively raise the utilization ratio of material, practiced thrift cost.Use my Da Rong of company oil pocket gear oil pump (patent No.: ZL200820117266.4, name is called Da Rong oil pocket gear oil pump) patented technology design gear parameter simultaneously, the volumetric efficiency and the working life of effectively having improved gear oil pump.
3, oil inlet and outlet of the present invention is separately positioned on joining plate and the bonnet, has reduced the suffered radial force of gear effectively, can realize standardized production single, multiplex pump simultaneously the working life of having improved gear oil pump, satisfies the various installation requirements of user.
4, side plate adopts circumferentially local asymmetric formula structure, adopts activation and coating to handle simultaneously, has realized the stress balance of gear; Significantly reduced the radial hydraulic pressure that gear bore; Improve the carrying and the impact resistance of gear oil pump, improved the formation ability of lubricant film simultaneously, reduced the friction factor between gear and the side plate widely; Starting torque and the gear of gear oil pump and the heat that the side sheet room friction pair is produced have been reduced; And have good heat-conductive characteristic, and the high temperature of gear oil pump, high speed performance are improved, be greatly improved working life.
Duplicate gear oil pump of the present invention has the positional accuracy that can guarantee gear hole and spindle hole, realizes starting torque and the gear of the stress balance of gear, the carrying that improves gear oil pump and impact resistance, minimizing gear oil pump and the advantages such as heat that the side sheet room friction pair is produced.
Description of drawings
Fig. 1 is the plan view of duplicate gear oil pump of the present invention.
Fig. 2 is the A-A sectional view among Fig. 1.
Fig. 3 is the plan view of the joining plate of duplicate gear oil pump of the present invention.
Fig. 4 is the B-B sectional view among Fig. 3.
Fig. 5 is the plan view of the bonnet of duplicate gear oil pump of the present invention.
Fig. 6 is the C-C sectional view among Fig. 5.
Fig. 7 is the plan view of the side plate of duplicate gear oil pump of the present invention.
Fig. 8 is the D-D sectional view among Fig. 7.
Fig. 9 is the plan view of the duplicate gear oil pump of existing technology.
Label in accompanying drawing 1～accompanying drawing 9: 1 axis hole, 2 upper end portions, 3 underparts, 4 cylndrical surface, 5 end faces, 6 protecgulums; The pump housing before 7,8 joining plates, 9 side plates, the 10 back pump housings, 11 bonnets, 12 joining plate oil ducts; 13 driving gear shafts, 14 driven gear shafts, 15 preceding driving gears, 16 rear drive gears, 17 preceding driven gears; 18 back driven gears, 19 positioning holes, 20 filler openings, 21 oil outlets, 22 bonnet oil ducts.
Below pass through embodiment, and combine accompanying drawing that the present invention is described further.
Embodiment
Referring to figure accompanying drawing 1～accompanying drawing 8, the duplicate gear oil pump comprises oil pump body, gear shaft and gear; Said gear shaft is located among the said oil pump body inner chamber, and said geared sleeve is located on the said gear shaft; Said oil pump body comprises protecgulum 6, the preceding pump housing 7, joining plate 8, side plate 9, the back pump housing 10 and bonnet 11; Said protecgulum 6, the preceding pump housing 7, joining plate 8, the back pump housing 10 and bonnet 11 set gradually from left to right, before said side plate 9 is positioned among the inner chamber of the pump housing 7 and the back pump housing 10; Said gear shaft comprises driving gear shaft 13 and driven gear shaft 14; Said gear comprises preceding driving gear 15, rear drive gear 16, preceding driven gear 17 and back driven gear 18; Driving gear 15 is meshed with preceding driven gear 17 before said, and two side plates 9 lay respectively at the both sides of said preceding driving gear 15 and preceding driven gear 17; Said rear drive gear 16 is meshed with back driven gear 18, and other two side plates 9 lay respectively at the both sides of said rear drive gear 16 and back driven gear 18;
On said protecgulum 6 right sides, said before on the left side and right side of the pump housing 7, on the left side and right side of said joining plate 8, be provided with four positioning holes 19 respectively on the left side of the said back pump housing 10 and the right side and on the left side of said bonnet 11;
Filler opening 20 and oil outlet 21 are set on said bonnet 11, are provided with bonnet oil duct 22 in the said bonnet 11; , said joining plate 8 is provided with filler opening 20 and oil outlet 21, is provided with joining plate oil duct 12 in the said joining plate 8.Locate through four positioning holes between the protecgulum and the preceding pump housing, locate through four positioning holes between the preceding pump housing and the joining plate, locate through four positioning holes between the joining plate and the back pump housing, locate through four positioning holes between the back pump housing and the bonnet.Protecgulum, the preceding pump housing, joining plate, the back pump housing link to each other with bonnet successively, and two end faces that match all are fixed together two parts adjacent one another are through the hollow locating stud in four positioning holes, can improve the degree that is connected firmly between the parts effectively; Avoid the end face that matches of parts to misplace; Thereby can prevent adjacent two parts inner chamber can keep good coaxality, make the suffered radial force of gear be reduced to minimum degree, thereby improve the working life of gear oil pump; Improve the gear oil pump performance;, under the situation of high-mechanic that guarantees gear oil pump and impact resistance, also make the boundary dimension of gear oil pump more exquisite simultaneously; Effectively raise the utilization ratio of material, practiced thrift cost.
Be equipped with filler opening and oil outlet on bonnet and the joining plate; Be equipped with oil duct in bonnet and the joining plate, these oil ducts form whole oil circuit through hydraulic fluid port and the preceding pump housing, the back intracavity inter-connection of the pump housing; Hydraulic oil is along the axial entering pump housing of gear; The hydraulic oil that has solved existing technology has improved the working life of gear oil pump along radially the getting into the pump housing of gear and the problem bigger to the gear train impulse ratio reduced the suffered radial force of gear effectively.
Said protecgulum, bonnet, joining plate, the preceding pump housing and the back pump housing all adopt the cast iron materials manufacturing to form, and the aluminium, the magnesium dust that inevitably produce in the time of can preventing gear oil pump work cause accident of mine disaster.
On the thickness direction of said side plate 9, be provided with the axis hole 1 that penetrates said side plate 9; The outer circumferential face of said side plate upper end portion 2 and underpart 3 is cylndrical surface 4, and said cylndrical surface 4 left side radius Rs 1 are bigger than cylndrical surface 4 right side radius Rs 2; Be coated with wear resistant coating on said side plate 9 end faces of both sides 5, the thickness of said wear resistant coating is 0.02mm～0.04mm.Cast iron duplicate gear oil pump adopts circumferentially local asymmetric formula structure with side plate, guaranteeing that fully low pressure area scrapes under the situation of shell sealing, has enlarged the zone of high pressure of gear oil pump to greatest extent; Significantly reduced the radial hydraulic pressure that gear bore; Thereby improved the working pressure of gear oil pump, side plate adopts activation and coating to handle simultaneously, and the thickness of coating is 0.02mm～0.04mm; Improved the formation ability of lubricant film; Reduced the friction factor between gear and the side plate widely, reduced starting torque and gear and the side plate of gear oil pump and asked the heat that friction pair produces, and had good heat-conductive characteristic; High temperature, the high speed performance of gear oil pump are improved, and be greatly improved working life.Wherein: R1 is
, and R2 is
The Main Ingredients and Appearance of said anti-friction wear-resistant sprayfused coating is: molybdenum disulfide, graphite, teflon, curing agent, plasticizer and epoxy resin.
The coating of preparation anti-friction wear-resistant sprayfused coating: powdery class material molybdenum disulfide, graphite, alumina powder, ptfe micropowder are put into batch mixer mix stirring 5-10 minute, make the powder that stirs, for use; Epoxy resin, curing agent, plasticizer are added organic solvent, put into another batch mixer and stirred 10-20 minute, stirring makes resin compound; Again powder that stirs and resin compound are put into lapping machine jointly, ground 10-20 minute, promptly make coating.
Said surperficial spraying method: adopt the air spraying mode to carry out the surface spraying, coating evenly is sprayed on the surface of the copper alloy layer of side plate with spray gun; Solidify then: be warming up to 80 ℃ of insulations 30 minutes, continue to be warming up to 120 ℃ of insulations 20 minutes, continue to be warming up to 140 ℃ of insulations 20 minutes, be warming up to 180 ℃ of insulations 60 minutes again, cool to room temperature at last with the furnace.
Claims (2)
1. the duplicate gear oil pump is characterized in that, comprises oil pump body, gear shaft and gear; Said gear shaft is located among the said oil pump body inner chamber, and said geared sleeve is located on the said gear shaft; Said oil pump body comprises protecgulum (6), the preceding pump housing (7), joining plate (8), side plate (9), the back pump housing (10) and bonnet (11); Said protecgulum (6), the preceding pump housing (7), joining plate (8), the back pump housing (10) and bonnet (11) set gradually from left to right, and said side plate (9) is positioned among the inner chamber of the preceding pump housing (7) and the back pump housing (10); Said gear shaft comprises driving gear shaft (13) and driven gear shaft (14); Said gear comprises preceding driving gear (15), rear drive gear (16), preceding driven gear (17) and back driven gear (18); Driving gear (15) and preceding driven gear (17) are meshed before said, and two side plates (9) lay respectively at the both sides of said preceding driving gear (15) and preceding driven gear (17); Said rear drive gear (16) and back driven gear (18) are meshed, and two side plates (9) lay respectively at the both sides of said rear drive gear (16) and back driven gear (18) in addition.
On said protecgulum (6) right side, said before on the left side and right side of the pump housing (7), on the left side and right side of said joining plate (8), be provided with four positioning holes (19) respectively on the left side of the said pump housing (10) afterwards and the right side and on the left side of said bonnet (11);
Filler opening (20) and oil outlet (21) are set on said bonnet (11), are provided with bonnet oil duct (22) in the said bonnet (11); Said joining plate (8) is provided with filler opening (20) and oil outlet (21), is provided with joining plate oil duct (22) in the said joining plate (8).
2. side plate according to claim 1 is provided with the axis hole (1) that penetrates said side plate (9) on the thickness direction of said side plate (9); The outer circumferential face of said side plate upper end portion (2) and underpart (3) is cylndrical surface (4), and said cylndrical surface (4) left side radius R 1 is bigger than right side, cylndrical surface (4) radius R 2; Be coated with wear resistant coating on said side plate (9) end faces of both sides (5), the thickness of said wear resistant coating is 0.02mm～0.04mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210160520XA CN102650281A (en) | 2012-05-22 | 2012-05-22 | Dual-gear oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210160520XA CN102650281A (en) | 2012-05-22 | 2012-05-22 | Dual-gear oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102650281A true CN102650281A (en) | 2012-08-29 |
Family
ID=46692376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210160520XA Pending CN102650281A (en) | 2012-05-22 | 2012-05-22 | Dual-gear oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102650281A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179228A (en) * | 2015-06-15 | 2015-12-23 | 安徽优源液压科技有限公司 | Double-channel hydraulic pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2217124Y (en) * | 1994-11-10 | 1996-01-10 | 青州液压件厂 | high pressure double gear pump |
| JP2003214358A (en) * | 2002-01-23 | 2003-07-30 | Koyo Seiko Co Ltd | Gear pump and power steering device using the same |
| CN201407174Y (en) * | 2009-03-19 | 2010-02-17 | 无锡威孚精密机械制造有限责任公司 | Side plate of high pressure gear pump |
| CN202560556U (en) * | 2012-05-22 | 2012-11-28 | 合肥长源液压股份有限公司 | Dual gear oil pump |
-
2012
- 2012-05-22 CN CN201210160520XA patent/CN102650281A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2217124Y (en) * | 1994-11-10 | 1996-01-10 | 青州液压件厂 | high pressure double gear pump |
| JP2003214358A (en) * | 2002-01-23 | 2003-07-30 | Koyo Seiko Co Ltd | Gear pump and power steering device using the same |
| CN201407174Y (en) * | 2009-03-19 | 2010-02-17 | 无锡威孚精密机械制造有限责任公司 | Side plate of high pressure gear pump |
| CN202560556U (en) * | 2012-05-22 | 2012-11-28 | 合肥长源液压股份有限公司 | Dual gear oil pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179228A (en) * | 2015-06-15 | 2015-12-23 | 安徽优源液压科技有限公司 | Double-channel hydraulic pump |
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Application publication date: 20120829 |