CN201396273Y - Novel ultra-high pressure gear oil pump - Google Patents
Novel ultra-high pressure gear oil pump Download PDFInfo
- Publication number
- CN201396273Y CN201396273Y CN2009200404387U CN200920040438U CN201396273Y CN 201396273 Y CN201396273 Y CN 201396273Y CN 2009200404387 U CN2009200404387 U CN 2009200404387U CN 200920040438 U CN200920040438 U CN 200920040438U CN 201396273 Y CN201396273 Y CN 201396273Y
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- gear
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- oil
- seal
- oil pump
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Abstract
The utility model discloses a novel ultra-high pressure gear oil pump, which consists of a drive gear, an internal circlip, a groove ball bearing, a pressure-resistant oil seal, a front cover, two needle bearings, two positioning pins, floating side plates, a pressure plate, fixed side plates, a pump body, a driven gear and bolts; the novel ultra-high pressure gear oil pump is characterized in that two needle bearings, the drive gear and the driven gear are arranged in the pump body; the two end surfaces of the drive gear and the driven gear are respectively provided with one floating side plate and one fixed side plate; a seal ring and the pressure plate are arranged between the floating side plates and the fixed side plates; a rectangle rubber seal ring is arranged in the seal slot of the end surface of the front cover; the inside of the front cover is provided with the two needle bearings, the pressure-resistant oil seal, the check ring of the oil seal, the groove ball bearing and the internal circlip; the combined pump body and the front cover are connected together by the two positioning pins, and then are tightened by four bolts and spring gaskets to form a single-chain gearoil pump. The novel ultra-high pressure gear oil pump has the advantages that the pressure gear oil pump can improve the working stability of the gear, reduce the internal leakage of the pump, reducedthe abrasion of the pump, improve the volumetric efficiency of the pump, and prolong the service life.
Description
Technical field
The utility model relates to a kind of gear oil pump, especially a kind of novel extreme pressure gear oil pump.
Background technique
At present, the engineering machinery new product of each main engine factory exploitation both at home and abroad requires supporting hydraulic gear oil pump rated pressure to reach 23～28MPa, in addition have require 31.5MPa.Problems such as and the rated pressure of the present hydraulic gear oil pump of China can only reach 20MPa, and ubiquity pressure is low, the life-span is short have a strong impact on effect.
High pressure gear oil pump is generally all selected needle roller bearing without inner ring for use, and the each several part size of bearing has determined the size of its bearing capacity.Because hydraulic gear pump is subjected to the restriction of volume, the size of the bearing and the gear diameter of axle also is restricted and can not accomplishes enough big.Thereby influence its bearing capacity, and then influence the raising and the working life of gear oil pump rated pressure.
High pressure gear oil pump generally all adopts the method for axial seal in order to obtain higher volumetric efficiency.Promptly process seal groove at fixed lateral plate (axle sleeve) end face, the groove built-in ring distinguishes high low pressure.Gear pump is when work, and high pressure oil is introduced into the zone of high pressure at floating side plate (axle sleeve) back side, by the pressure of hydraulic oil and the elastic force effect of seal ring, floating side plate (axle sleeve) is fitted tightly with gear face, to realize the axial end sealing.Since seal ring total some be exposed at the seal groove outside, add factors such as the low and protective measure of rubber seal intensity is ineffective, ruptured easily by the direct impact of high pressure oil, cause seal failure, the oil pump performance forfeiture.
Summary of the invention
The purpose of this utility model is the deficiency that overcomes prior art, and a kind of novel extreme pressure gear oil pump is provided.This high pressure gear oil pump can improve the stationarity of working gear, reduces the internal leakage of pump, reduces the wearing and tearing of pump, improves the volumetric efficiency of pump, increases the service life.
The purpose of this utility model is achieved through the following technical solutions: the both sides of the pump housing have filler opening and oil outlet respectively, two needle bearings, driving gear, driven gear are housed in the pump housing, driving gear, driven gear both ends of the surface respectively have a floating side plate and fixed lateral plate, and seal ring and pressing plate are housed between floating side plate and the fixed lateral plate.Seal ring is embedded in the seal groove at the floating side plate back side, a metal platen is housed on seal groove seal ring is fixed between floating side plate, the pump housing and the pressing plate, pressing plate side plate and the pump housing the holding steadily that be fixed.In the protecgulum end face seal groove rubber rectangular ring is housed, two needle bearings, withstand voltage oil sealing, oil seal collar, deep groove ball bearing and hole back-up ring are equipped with in inside.The pump housing that combines and protecgulum are associated in together by two locating studs, become a simply connected gear oil pump by four bolt and spring washer circles are fastening again.
Described high pressure gear oil pump adopts raceway to have the needle bearing of convexity.
Described gear adopts the large pressure angle profile of tooth.
Described filler opening passage inboard along oil-feed direction Cross section Design in echelon, and is outer wide and interior narrow, thereby reduces radial force.
Wherein, dwindle sucking angle φ ' and reduced and act on the radial force that gear oil pump holds, reduced bearing load, thereby improved the working life of bearing.Expand high-voltage oil cavity to oil suction chamber one side, make the radial force of symmetrical region obtain balance, thereby alleviated the radial force that acts on the bearing, improved the life-span of bearing.Four needle bearings play supporting role to driving gear and driven gear; Floating side plate, fixed lateral plate, seal ring and pressing plate play the end face seal effect, and pressing plate can also protect seal ring not to be hit in addition; Withstand voltage oil sealing and oil seal collar prevent hydraulic oil seepage outside the gear axial pump; The hole prevents that with back-up ring oil sealing from moving axially, and deep groove ball bearing is to be subjected to external radial force at pump shaft to do the time spent, and pump is shielded; The hole is played fixation with back-up ring to bearing, prevents its axial float.
The utility model has the advantages that: adopted needle bearing, the convexity of needle roller and raceway is matched, increased lifting surface area, thereby reduced the extrusion stress that needle roller bore, and then improved the working life of bearing.Improve the axial seal structure, make the stressing conditions of seal ring obtain very big improvement, thereby improved greatly the working life of seal ring.Gear adopts the large pressure angle profile of tooth, can improve the resistance to flexure of the gear teeth, has prolonged the life-span of gear pump.Expand high-voltage oil cavity to oil suction chamber one side, thereby alleviated the radial force that acts on the bearing, improved the life-span of bearing.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples;
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of side plate;
Fig. 3 is for improving the axial seal structural representation;
Fig. 4 dwindles the structural representation that sucks angle φ ' and enlarge the zone of high pressure.
Among the figure, 1. driving gear, 2. hole back-up ring, 3. deep groove ball bearing, 4. hole back-up ring, 5. withstand voltage oil sealing, 6. oil seal collar, 7. protecgulum, 8. needle bearing, 9. locating stud, 10. rectangular seal, 11. floating side plates, 12. seal ring, 13, pressing plate, 14. fixed lateral plates, 15. the pump housing, 16. driven gears, 17. bolts, 18. spring washers, 19. filler opening, 20. oil outlets, e. aperture.
In Fig. 1, Fig. 2, two needle bearings 8, driving gear 1, driven gear 16 are housed in the pump housing 15, the both sides of the pump housing 15 have filler opening 19 and oil outlet 20 respectively, driving gear, driven gear both ends of the surface respectively have a floating side plate 11 and fixed lateral plate 14, and seal ring 12 and pressing plate 13 are housed between floating side plate and the fixed lateral plate.In the protecgulum 7 end face seal grooves rubber rectangular ring 10 is housed, two needle bearings 8, withstand voltage oil sealing 5, oil seal collar 6, deep groove ball bearing 3 and hole back-up ring 4 is equipped with in inside.The pump housing that combines and protecgulum are associated in together by two locating studs 9, become a simply connected gear oil pump by four bolts 17 and spring washer 18 are fastening again.
Described high pressure gear oil pump adopts raceway to have the needle bearing 8 of convexity.When deflection deformation under high pressure takes place in gear shaft, force needle roller to adjust the position along raceway, the convexity of needle roller and raceway is matched, increased lifting surface area, thereby reduced the extrusion stress that needle roller bore, and then improved the working life of bearing.
Described gear adopts the large pressure angle profile of tooth.
With reference to Fig. 3, the axial end sealing is adopted seal ring 12 is embedded in the seal groove at floating side plate 11 back sides fully, add a metal platen 13 above again seal ring 12 is securely fixed between floating side plate 11, the pump housing 15 and the pressing plate 13, the side plate 14 and the pump housing 15 holding steadily and pressing plate 13 is fixed.Hydraulic oil enters floating side plate 11 back sides by aperture e during oil pump work.When system's generation hydraulic shock, hydraulic oil only directly impacts pressing plate 13, does not directly impact seal ring 12, makes the stressing conditions of seal ring 12 obtain very big improvement, thereby has improved greatly the working life of seal ring 12.
With reference to Fig. 4, in order to reduce radial force, we are outer wide and interior narrow with filler opening passage inboard along oil-feed direction Cross section Design in echelon.The filler opening inner chamber is wide to doing as far as possible along pump shaft, so promptly guarantee to have enough logical pastas long-pending to satisfy the needs that reduce the oil-feed flow velocity, can reduce to have reduced the radial force that acts on the gear oil pump bearing because of what suck angle φ ' again, reduced bearing load, thereby improved the working life of bearing.
Wherein, high-voltage oil cavity is expanded to oil suction chamber one side.When pump structure designs, only allow interporal lacuna minimum in the tooth top of 1～2 tooth of filler opening one side low pressure area and the pump housing, and remaining tip clearance is increased.In very big radial clearance zone, pressure all is outlet pressure like this.Therefore the radial force of symmetrical region has obtained balance, thereby has alleviated the radial force that acts on the bearing, has improved the life-span of bearing.
Claims (4)
1, a kind of novel extreme pressure gear oil pump comprises driving gear, hole back-up ring, deep groove ball bearing, withstand voltage oil sealing, protecgulum, needle bearing, locating stud, floating side plate, pressing plate, fixed lateral plate, the pump housing, driven gear, bolt; The both sides of the pump housing have filler opening and oil outlet respectively, it is characterized in that: two needle bearings, driving gear, driven gear are housed in the pump housing, driving gear, driven gear both ends of the surface respectively have a floating side plate and fixed lateral plate, and seal ring and pressing plate are housed between floating side plate and the fixed lateral plate; Seal ring is embedded in the seal groove at the floating side plate back side, a metal platen is housed on seal groove seal ring is fixed between floating side plate, the pump housing and the pressing plate, pressing plate side plate and the pump housing the holding steadily that be fixed; In the protecgulum end face seal groove rubber rectangular ring is housed, two needle bearings, withstand voltage oil sealing, oil seal collar, deep groove ball bearing and hole back-up ring are equipped with in inside; The pump housing that combines and protecgulum are associated in together by two locating studs, become a simply connected gear oil pump by four bolt and spring washer circles are fastening again.
2, a kind of novel extreme pressure gear oil pump according to claim 1 is characterized in that: described high pressure gear oil pump adopts raceway to have the needle bearing of convexity.
3, a kind of novel extreme pressure gear oil pump according to claim 1 is characterized in that: described gear adopts the large pressure angle profile of tooth.
4, a kind of novel extreme pressure gear oil pump according to claim 1, it is characterized in that: described filler opening passage inboard along oil-feed direction Cross section Design in echelon, and is outer wide and interior narrow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200404387U CN201396273Y (en) | 2009-04-22 | 2009-04-22 | Novel ultra-high pressure gear oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200404387U CN201396273Y (en) | 2009-04-22 | 2009-04-22 | Novel ultra-high pressure gear oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201396273Y true CN201396273Y (en) | 2010-02-03 |
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ID=41618782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200404387U Expired - Fee Related CN201396273Y (en) | 2009-04-22 | 2009-04-22 | Novel ultra-high pressure gear oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201396273Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562577A (en) * | 2012-02-28 | 2012-07-11 | 徐州科源液压有限公司 | Extra-high pressure gear oil pump |
| CN103032313A (en) * | 2013-01-11 | 2013-04-10 | 徐州科源液压股份有限公司 | Floating side plate of ultrahigh voltage gear pump |
| CN103122853A (en) * | 2013-01-11 | 2013-05-29 | 徐州科源液压股份有限公司 | High-pressure gear pump floating side plate with pressing plate |
| CN104819152A (en) * | 2015-05-20 | 2015-08-05 | 合肥长源液压股份有限公司 | Inlay uniting type gear oil pump body |
| CN104819151A (en) * | 2015-05-20 | 2015-08-05 | 合肥长源液压股份有限公司 | Gear oil pump with inlay uniting type pump body and side plates with damping holes |
| CN106523348A (en) * | 2016-12-14 | 2017-03-22 | 徐州科源液压股份有限公司 | Gear pump adopting impact-resistant type floating side plates |
| CN106678038A (en) * | 2017-02-15 | 2017-05-17 | 王映辉 | Double-triangular rotor pump |
| CN107762844A (en) * | 2017-11-29 | 2018-03-06 | 徐州科源液压股份有限公司 | With preposition bearing-type gear oil pump |
-
2009
- 2009-04-22 CN CN2009200404387U patent/CN201396273Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562577A (en) * | 2012-02-28 | 2012-07-11 | 徐州科源液压有限公司 | Extra-high pressure gear oil pump |
| CN103032313A (en) * | 2013-01-11 | 2013-04-10 | 徐州科源液压股份有限公司 | Floating side plate of ultrahigh voltage gear pump |
| CN103122853A (en) * | 2013-01-11 | 2013-05-29 | 徐州科源液压股份有限公司 | High-pressure gear pump floating side plate with pressing plate |
| CN103032313B (en) * | 2013-01-11 | 2016-04-06 | 徐州科源液压股份有限公司 | The floating side plate of ultrahigh voltage gear pump |
| CN104819152A (en) * | 2015-05-20 | 2015-08-05 | 合肥长源液压股份有限公司 | Inlay uniting type gear oil pump body |
| CN104819151A (en) * | 2015-05-20 | 2015-08-05 | 合肥长源液压股份有限公司 | Gear oil pump with inlay uniting type pump body and side plates with damping holes |
| CN106523348A (en) * | 2016-12-14 | 2017-03-22 | 徐州科源液压股份有限公司 | Gear pump adopting impact-resistant type floating side plates |
| CN106678038A (en) * | 2017-02-15 | 2017-05-17 | 王映辉 | Double-triangular rotor pump |
| CN107762844A (en) * | 2017-11-29 | 2018-03-06 | 徐州科源液压股份有限公司 | With preposition bearing-type gear oil pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100203 Termination date: 20100422 |