CN102562577A - Extra-high pressure gear oil pump - Google Patents
Extra-high pressure gear oil pump Download PDFInfo
- Publication number
- CN102562577A CN102562577A CN2012100463184A CN201210046318A CN102562577A CN 102562577 A CN102562577 A CN 102562577A CN 2012100463184 A CN2012100463184 A CN 2012100463184A CN 201210046318 A CN201210046318 A CN 201210046318A CN 102562577 A CN102562577 A CN 102562577A
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- gear shaft
- bearing
- needle roller
- high pressure
- driving gear
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Abstract
The invention discloses an extra-high pressure gear oil pump, and relates to a hydraulic element, and in particular to an extra-high pressure gear oil pump with the rated pressure above 20 MPa, used for engineering machinery, construction machinery and petroleum and mining machinery. In order to avoid that the deflection deformation of a gear shaft happen due to resultant force generated by the high pressure of the gear oil pump, a concentrated load area is formed between the gear shaft and a needle roller bearing, and the parts of the gear shaft and the needle roller bearing in the concentrated load area are abraded and scraped quickly, an inner hole in a bearing outer ring is processed into an arc roller path with certain concavity; when the deflection deformation of the gear shaft happens by the action of the resultant force F generated by the high pressure, a roller pin is compressed to be subjected to the deflection deformation, and the deformed roller pin is matched with the arc roller path of the inner hole in the bearing outer ring, so that the roller pin is stressed uniformly in the whole length direction, no concentrated load area is generated, and the service lives of the gear shaft and the needle roller bearing are ensured.
Description
Technical field
The present invention relates to a kind of hydraulic element, be specifically related to a kind of extreme pressure gear oil pump in the main process equipments such as building machinery, engineering machinery, handling machinery, oil mining machinery.
Background technique
Hydraulic gear oil pump is simple in structure owing to it, volume is little, in light weight, characteristics such as installation and maintenance convenient, contamination resistance strong, it is reliable to use, life-span length, in the hydraulic transmission control technique, is widely used in the main process equipments such as building machinery, engineering machinery, handling machinery, oil mining machinery.Like truck crane, loader, bulldozer, pile driver, oil-well rig, grader etc.The engineering machinery new product of domestic and international at present each main engine factory's exploitation; Require supporting hydraulic gear oil pump rated pressure to reach 23～28MPa; What have also requires 31.5MPa; And the rated pressure of the present hydraulic gear oil pump of China can only reach 20MPa, has a long way to go with external advanced level and main frame technical requirements, can't satisfy the use of main frame.The present homemade high pressure gear oil pump rated pressure multiple reason that do not increased; Wherein one of most important reason is that the teeth wheel shaft of making a concerted effort that the gear oil pump high pressure produces receives high pressure to produce deflection deformation; Form the concentrated load district between the needle roller of gear shaft and needle bearing; The concentrated load district is very little, has but born all and has made a concerted effort, and teeth wheel shaft and needle bearing rapidly wear and tear, scrap at the position in concentrated load district.
Summary of the invention
In order to solve the problems of the technologies described above; The present invention provides a kind of extreme pressure gear oil pump; The endoporus of bearing outer ring is processed into the arcuate groove that has certain concavity, and when the gear shaft following generation of force action under high pressure deflection deformation, gear shaft is oppressed needle roller generation deflection deformation simultaneously; Needle roller after the distortion conforms to the arcuate groove of bearing outer ring endoporus, thereby makes needle roller evenly stressed on whole length direction.
The present invention realizes through following technological scheme: a kind of extreme pressure gear oil pump, it comprises: the pump housing, protecgulum, driving gear and driven gear.The described pump housing is in the same place through locating stud and bolt with protecgulum, forms the housing of gear oil pump.Described driving gear and driving gear shaft are integral structure, and described driven gear and driven gear shaft are integral structure; Between described driving gear and the driven gear end faces of both sides and the pump housing combined seal ring is arranged.Described driving gear shaft is connected with the pump housing or protecgulum through needle bearing respectively with the position of driven gear shaft near gear; The driving gear shaft outer end also is connected with protecgulum with seal ring through deep groove ball bearing.Described needle bearing is a needle roller bearing without inner ring, and it has only bearing outer ring and needle roller.It is characterized in that: the endoporus of described bearing outer ring is processed into the arcuate groove that has certain concavity; The effect of making a concerted effort that produces at high pressure when driving gear shaft or driven gear shaft is down during the generation deflection deformation; Compressing needle roller generation deflection deformation; Needle roller after the distortion conforms to the arcuate groove of bearing outer ring endoporus, thereby makes needle roller evenly stressed on whole length direction.
Good effect of the present invention is:
1, gear shaft is when under high pressure force action down produces deflection deformation; Gear shaft is oppressed needle roller generation deflection deformation simultaneously; Needle roller after the distortion conforms to the arcuate groove of bearing outer ring endoporus; Thereby make needle roller evenly stressed on whole length direction, can not produce the concentrated load district, guarantee the working life of gear shaft and needle bearing.
2, pump pressure reaches P=31.5MPa to Pmax=40MPa.Can satisfy the use of hydraulic pressure execution architecture in the main process equipments such as constructional engineering machinery, handling machinery, oil mining machinery fully.
3, rational in infrastructure, preparation process is uncomplicated, and cost of production is low, is convenient to promote the use of.
Description of drawings
Below in conjunction with accompanying drawing and embodiment, the present invention is done further explain.
Fig. 1 is a structural representation of the present invention;
Fig. 2 produces the deflection deformation schematic representation for the needle bearing gear shaft that adopts inherent technology receives high pressure;
Fig. 3 receives high pressure to produce the deflection deformation schematic representation for adopting needle bearing gear shaft of the present invention.
Among the figure: 1, driving gear, 1-1, driving gear shaft, 2, deep groove ball bearing, 3, seal ring, 4, protecgulum; 5, needle bearing, 5-1, bearing outer ring, 5-2, needle roller, 6, locating stud; 7, combined seal ring, 8, the pump housing, 9, driven gear, 9-1, driven gear shaft.G, concentrated load district, what F, high pressure produced makes a concerted effort.
Embodiment
Like Fig. 1, Fig. 2, shown in Figure 3: a kind of extreme pressure gear oil pump, it comprises: the pump housing 8, protecgulum 4, driving gear 1 and driven gear 9.The described pump housing 8 is in the same place through locating stud 6 and bolt with protecgulum 4, forms the housing of gear oil pump, and described driving gear 1 is an integral structure with driving gear shaft 1-1, and described driven gear 9 is an integral structure with driven gear shaft 9-1.Between described driving gear 1 and driven gear 9 end faces of both sides and the pump housing 8 combined seal ring 7 is arranged, described driving gear shaft 1-1 is connected with the pump housing 8 or protecgulum 4 through needle bearing 5 respectively near the position of gear with driven gear shaft 9-1.Driving gear shaft 1-1 outer end also is connected with protecgulum 4 with seal ring 3 through deep groove ball bearing 2.Described needle bearing 5 is a needle roller bearing without inner ring, and it has only bearing outer ring 5-1 and needle roller 5-2.It is characterized in that: the endoporus of described bearing outer ring 5-1 is processed into the arcuate groove that has certain concavity; The effect of the F that makes a concerted effort that produces at high pressure as driving gear shaft 1-1 and driven gear shaft 9-1 is down during the generation deflection deformation; Deflection deformation takes place in gear shaft compressing needle roller 5-2; Needle roller 5-2 after the distortion conforms to the arcuate groove of bearing outer ring 5-1 endoporus, thereby makes needle roller evenly stressed on whole length direction.
As shown in Figure 2: the needle roller bearing without inner ring that uses on the intrinsic high pressure gear oil pump; When deflection deformation takes place in driving gear shaft 1-1 and driven gear shaft 9-1 under the effect of the F that makes a concerted effort that high pressure produces; Form concentrated load district G between driving gear shaft 1-1 and driven gear shaft 9-1 and the needle bearing 5; G is very little in the concentrated load district; But born the F that makes a concerted effort that whole high pressure produce, caused driving gear shaft 1-1, driven gear shaft 9-1 and needle bearing 5 rapidly to wear and tear, scrap at the position in concentrated load district.
It is as shown in Figure 3: when driving gear shaft 1-1 and driven gear shaft 9-1 produce deflection deformation under high pressure force F effect; Driving gear shaft 1-1 and driven gear shaft 9-1 oppress needle roller 5-2 simultaneously deflection deformation take place; Needle roller 5-2 after the distortion conforms to the arcuate groove of bearing outer ring 5-1 endoporus; Thereby make needle roller 5-2 evenly stressed on whole length direction, can not produce concentrated load district G, the working life of guaranteeing gear shaft and needle bearing 5.Rated pressure through the ultrahigh pressure gear pump after improving reaches P=31.5MPa, and maximum pressure reaches Pmax=40MPa.Can satisfy the use of hydraulic pressure execution architecture in the main process equipments such as constructional engineering machinery, handling machinery, oil mining machinery fully.
Claims (1)
1. extreme pressure gear oil pump, it comprises: the pump housing (8), protecgulum (4), driving gear (1) and driven gear (9); The described pump housing (8) and protecgulum (4) through locating stud (6) and bolt together, the housing of composition gear oil pump; Described driving gear (1) is an integral structure with driving gear shaft (1-1), and described driven gear (9) is an integral structure with driven gear shaft (9-1); Between described driving gear (1) and driven gear (9) end faces of both sides and the pump housing (8) combined seal ring (7) is arranged; Described driving gear shaft (1-1) is connected with the pump housing (8) or protecgulum (4) through needle bearing (5) respectively with the position of driven gear shaft (9-1) near gear; Driving gear shaft (1-1) outer end also is connected with protecgulum (4) with seal ring (3) through deep groove ball bearing (2); Described needle bearing (5) is a needle roller bearing without inner ring, and it has only bearing outer ring (5-1) and needle roller (5-2);
It is characterized in that: the endoporus of described bearing outer ring (5-1) is processed into the arcuate groove that has certain concavity; The effect of make a concerted effort (F) that produces at high pressure when driving gear shaft (1-1) or driven gear shaft (9-1) is down during the generation deflection deformation; Deflection deformation takes place in compressing needle roller (5-2); Needle roller after the distortion (5-2) conforms to the arcuate groove of bearing outer ring (5-1) endoporus, thereby makes needle roller (5-2) evenly stressed on whole length direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100463184A CN102562577A (en) | 2012-02-28 | 2012-02-28 | Extra-high pressure gear oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100463184A CN102562577A (en) | 2012-02-28 | 2012-02-28 | Extra-high pressure gear oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102562577A true CN102562577A (en) | 2012-07-11 |
Family
ID=46408891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100463184A Pending CN102562577A (en) | 2012-02-28 | 2012-02-28 | Extra-high pressure gear oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102562577A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062051A (en) * | 2013-01-24 | 2013-04-24 | 徐州科源液压股份有限公司 | Coupling gear for high-pressure gear pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0843094A1 (en) * | 1996-11-06 | 1998-05-20 | Georges Briere S.A. | Helical gear pump |
| US20020054723A1 (en) * | 2000-11-07 | 2002-05-09 | Takeshi Fuchida | Radial roller bearing, rotating apparatus using same and method of manufacturing the apparatus |
| CN2731143Y (en) * | 2004-10-10 | 2005-10-05 | 于志洵 | Inner ring free needle roller bearing for gear pump |
| DE102006039365A1 (en) * | 2006-08-22 | 2008-03-06 | Schaeffler Kg | Radial tensioned roller bearing for use as e.g. pinion bearing in steering gear, has bearing outer ring and rolling body axial parallelly guided in cage, where convexity radius of rolling body is larger than convexity radius of outer path |
| CN201396273Y (en) * | 2009-04-22 | 2010-02-03 | 徐州科源液压有限公司 | Novel ultra-high pressure gear oil pump |
| CN202468302U (en) * | 2012-02-28 | 2012-10-03 | 徐州科源液压有限公司 | Extra-high pressure gear oil pump |
-
2012
- 2012-02-28 CN CN2012100463184A patent/CN102562577A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0843094A1 (en) * | 1996-11-06 | 1998-05-20 | Georges Briere S.A. | Helical gear pump |
| US20020054723A1 (en) * | 2000-11-07 | 2002-05-09 | Takeshi Fuchida | Radial roller bearing, rotating apparatus using same and method of manufacturing the apparatus |
| CN2731143Y (en) * | 2004-10-10 | 2005-10-05 | 于志洵 | Inner ring free needle roller bearing for gear pump |
| DE102006039365A1 (en) * | 2006-08-22 | 2008-03-06 | Schaeffler Kg | Radial tensioned roller bearing for use as e.g. pinion bearing in steering gear, has bearing outer ring and rolling body axial parallelly guided in cage, where convexity radius of rolling body is larger than convexity radius of outer path |
| CN201396273Y (en) * | 2009-04-22 | 2010-02-03 | 徐州科源液压有限公司 | Novel ultra-high pressure gear oil pump |
| CN202468302U (en) * | 2012-02-28 | 2012-10-03 | 徐州科源液压有限公司 | Extra-high pressure gear oil pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062051A (en) * | 2013-01-24 | 2013-04-24 | 徐州科源液压股份有限公司 | Coupling gear for high-pressure gear pump |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120711 |