CN105840976A - High-pressure gear oil pump - Google Patents
High-pressure gear oil pump Download PDFInfo
- Publication number
- CN105840976A CN105840976A CN201610291256.1A CN201610291256A CN105840976A CN 105840976 A CN105840976 A CN 105840976A CN 201610291256 A CN201610291256 A CN 201610291256A CN 105840976 A CN105840976 A CN 105840976A
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- China
- Prior art keywords
- gear
- oil pump
- driven gear
- driving gear
- gear shaft
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
- F16N13/20—Rotary pumps
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses a high-pressure gear oil pump which comprises a pump body, two end covers, a driving gear shaft and a driven gear shaft. The two end covers are arranged at the two ends of the pump body correspondingly. The driving gear shaft and the driven gear shaft are arranged in the pump body. The driving gear shaft is provided with a driving gear, the driven gear shaft is provided with a driven gear, and the driving gear and the driven gear are in engaged transmission. According to the gear parameters of the driving gear and the driven gear, the pressure angle is 28 degrees, the center distance is 33 mm, the modulus is 3.25, and the number of teeth is 10. The gears of the parameters are adopted, and therefore the overlap coefficient of the gears can be effectively reduced, the radial clearance of the gears and the clearance at the engaging lines of the gears are automatically adjusted, and the oil trap volume is reduced; the sliding coefficient and contact stress of gear faces are reduced, leakage of engaging points is reduced, the axial size of the gear oil pump is reduced, and therefore the service life of the gears is prolonged, and the volume efficiency of the gear oil pump is improved; and the work reliability of the gear oil pump is effectively improved, the service life of the gear oil pump is effectively prolonged, the production cost is reduced, and economic benefits are improved.
Description
Technical field
The present invention relates to a kind of high pressure gear oil pump.
Background technology
Gear oil pump is applicable to carry the various liquid having lubricity, is widely used in many mechanical systems.Traditional tooth
Wheel oil pump, including the pump housing, the protecgulum at the two ends being respectively arranged on the pump housing and bonnet and the driving gear shaft being located in the pump housing and from
Movable gear shaft, driving gear shaft is provided with driving gear, and driven gear shaft is provided with driven gear, and gear oil pump is in the running
Driving gear drives driven gear to rotate, and fluid enters in the pump housing from fuel feed hole and discharges from oil outlet.
Existing a kind of gear oil pump, gear parameter is: 3 modulus 10 teeth, centre-to-centre spacing are 33mm, pressure angle is 20 ° of (roots
Gear according to existing GB/T1356-1988 " involute cylindrical gear basic tooth profile " standard), the gear oil pump of this structure,
Owing to contact ratio when gear engages and backlash are relatively big, pump the most easily makes hydraulic oil generate heat, and volumetric efficiency is low,
Power is little, and service life is short, and discharge capacity only has 04mL/r～20mL/r, and can only use under rated pressure 20MPa.
Summary of the invention
The technical problem to be solved is to provide a kind of high pressure gear oil pump, the volumetric efficiency of this high pressure gear oil pump,
Functional reliability, service life, discharge capacity and rated operating pressure can effectively improve.
In order to solve above-mentioned technical problem, the present invention adopts the following technical scheme that high pressure gear oil pump, including the pump housing, difference
It is located at two end caps at the two ends of the pump housing and the driving gear shaft being located in the pump housing and driven gear shaft, described driving gear shaft
Being provided with driving gear, described driven gear shaft is provided with driven gear, described driving gear and driven gear and forms engagement biography
Dynamic, the gear parameter of described driving gear and driven gear is: pressure angle 28 °, centre-to-centre spacing 33mm, 3.25 modulus 10 teeth.
Further, journal diameter is 20mm.
Further, also including two axle sleeves being set on driving gear shaft and driven gear shaft, said two axle sleeve is respectively
It is positioned at the both sides of driving gear and driven gear.
Further, the one side towards end cap of described axle sleeve is provided with the seal groove of the figure of three, described seal groove
The sealing ring matched with it is inside installed.
Further, described sealing ring is provided with the sealing ring blend stop of the figure of three.
The invention have the benefit that
The present invention uses the gear of above-mentioned parameter, it is possible to effectively reduce the contact ratio of gear, is automatically adjusted gear radial clearance
With the gap at gear path of contact, reduce protected oil volume, and make the slide coefficient of the flank of tooth and contact stress reduce, meshing point
Leakage loss reduces, and the axial dimension of gear oil pump reduces, thus extends the service life of gear, improves the appearance of gear oil pump
Long-pending efficiency, and be effectively increased functional reliability and the service life of gear oil pump, reduces production cost, improve through
Ji benefit.Discharge capacity can be improved to 25mL/r by high pressure gear oil pump of the present invention, and rated operating pressure is promoted to 25MPa.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the lateral surface structural representation of bottom bracket axle of the present invention.
Fig. 3 is the structural representation of sealing ring in the present invention.
Fig. 4 is that the A-A of Fig. 3 is to sectional view.
Fig. 5 is the medial surface structural representation of bottom bracket axle of the present invention.
Fig. 6 is that compensating groove in the present invention, unloading hole are closed SPACE V and carried out the view of off-load.
Being labeled as of each parts in accompanying drawing: 1 pump housing, 2 end caps, 31 driving gear shafts, 32 driven gear shafts, 4 axle sleeves,
51 driving gears, 52 driven gears, 41 compensating grooves, 42 unloading holes, 43 seal grooves, 6 sealing rings, 61 sealing ring gears
Bar, V close space.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
See Fig. 1
High pressure gear oil pump of the present invention, including the pump housing 1, two end caps 2 at the two ends being respectively arranged on the pump housing 1 and be located at pump
Driving gear shaft 31 in body 1 and driven gear shaft 32, described driving gear shaft 31 is provided with driving gear 51, described
Driven gear shaft 32 is provided with driven gear 52, and described driving gear 51 and driven gear 52 form engaged transmission, and it is special
Levy and be: the gear parameter of described driving gear 51 and driven gear 52 is: pressure angle 28 °, centre-to-centre spacing 33mm, 3.25
Modulus 10 tooth.
The gear of gear oil pump is made above-mentioned improvement by the present invention can effectively reduce the contact ratio of gear, is automatically adjusted gear footpath
Gap at gap, gear path of contact, and compared with the master gear of the number of teeth:
1. from theory of mechanics: the angle of engagementThe weight of gear engagement
Repeatedly coefficientWork as αnDuring increase, meshingangleα becomes big, and contact ratio diminishes, and makes protected oil volume diminish,
Thus reduce the noise of gear oil pump, decrease fluid heating.
2., due to the angle of engagement and the increasing of radius of curvature ρ of profile of tooth, make the slide coefficient of the flank of tooth and contact stress reduce, thus
Improve the abrasion condition of the gear teeth, extend the service life of gear.
3. there is bigger radius of curvature due to revised profile of tooth, contact with each other more tight, make the leakage loss of meshing point reduce,
Improve volumetric efficiency.
4. by the computing formula of gear motor discharge capacity: V=(6.66～7) Zm2B (Z is the number of teeth, and m is modulus, and b is the facewidth)
It follows that during same displacement, when using gear to use 3.25 modulus 10 tooth, relatively existing 3 domestic modulus 10 tooth teeth
Width diminishes, and efficiently reduces the axial dimension of gear oil pump, reduces production cost, improves economic benefit.
5. by gear force in radial computing formula: F master=0.75PDeb, F from=(P is operating pressure to 0.85PDeb, De
For tip diameter, b is the facewidth, and outside circle of the present invention is φ 39.5, and existing structure is φ 39) can be seen that same displacement,
Compared with in existing structure, master and slave tooth force in radial is greatly reduced the present invention, thus is effectively increased the reliable operation of gear oil pump
Property and service life.
The displacement range of high pressure gear oil pump of the present invention reaches 25MPa in 04mL/r～25mL/r, rated operating pressure.
In one embodiment of the present of invention, journal diameter is 20mm.Limiting because of gear parameter in existing structure, axle journal can only be
18mm～19mm, bearing capacity is relatively low.The present invention makees above-mentioned improvement can improve the strength and stiffness of axle journal, improves tooth
The bearing capacity of wheel oil pump, it is ensured that dependability during rated operating pressure 25MPa and service life.
Participate in Fig. 1, in one embodiment of the present of invention, also include that two are set in driving gear shaft 31 and driven gear shaft
Axle sleeve 4 on 32, said two axle sleeve 4 lays respectively at driving gear 51 and the both sides of driven gear 52.
Seeing Fig. 1 and Fig. 2, in one embodiment of the present of invention, the one side towards end cap 2 of described axle sleeve 4 is provided with " 3 "
The seal groove 43 of font, is provided with the sealing ring 6 matched with it in described seal groove 43.In prior art, axle
Sealing between set and end cap is provided in the medial surface of end cap, and needs to arrange two seal with O rings, between two O
Having leakage at gap, when leakage rate is big, easily causes gear volumetric efficiency and decline, O-ring seals is because of the compression of self
Amount is relatively big, and between two O, and between each composition surface, the frictional force of generation is the biggest, causes the machinery of gear oil pump relatively
Low.
The present invention is then to be sealingly disposed on axle sleeve 4, and seal groove 43 is in the figure of three.The present invention's is this
Structure can make sealing member effectively fit with the sealing ring in end cap and axle sleeve along with the floating of axle sleeve, reduces leakage.
Seeing Fig. 3 and Fig. 4, in one embodiment of the present of invention, the one side towards end cap 2 of described sealing ring 6 is embedded
Having the sealing ring blend stop 61 of the figure of three, sealing ring blend stop 61 can use polytetrafluoroethylmaterial material to make.The present invention uses
Sealing ring 6 and the combined labyrinth and carbon gland of sealing ring blend stop 61, it is possible to simultaneously by excellent to the adjustment of high and low nip balanced area
Changing, make to cause the fluid of end face of shaft bush, the balancing force formed in acting on compensation sealing region, more than gear face hydraulic pressure
Act on the propulsive thrust of end face of shaft bush, improve the dynamic hydraulic balance of gear oil pump, make the axle sleeve at a variety of pressures can be automatic
It is adjacent to gear face, automatically compensates after abrasion, will not reduce again mechanical efficiency because balancing force is excessive simultaneously, and effectively
Avoid the leakage of original each sealing member gap location, reduce the frictional force of gear oil pump self, improve the volume of gear oil pump
Efficiency and mechanical efficiency.
See Fig. 5, in one embodiment of the present of invention, described axle sleeve 4 towards driving gear 51 and driven gear 52
The position in one side corresponding high pressure laminated oil zone and low pressure oil suction district is respectively equipped with compensating groove 41, described axle sleeve 4 towards actively
The position of the one side corresponding high pressure laminated oil zone of gear 51 and driven gear 52 is additionally provided with two unloading holes 42, said two
Unloading hole 42 is positioned at the inner side of the compensating groove 41 of corresponding high pressure laminated oil zone compensating groove 41 phase of high pressure laminated oil zone corresponding to this
Logical.
The profile of tooth of gear oil pump the most all uses involute, and its contact ratio E need to be more than 1, i.e. at the gear teeth of front pair of meshing
When not yet completely disengaging from engagement, rear a pair gear teeth have been enter into engagement, thus arise that the above gear teeth are simultaneously engaged by two
Situation, thus forms one between two path of contacts and pump end cap and closes SPACE V (referred to as protected oil volume), see Fig. 6, when
Gear continues to rotate, and between the tooth that high pressure laminated oil zone is engaging-in, oil pressure increases sharply, and forms superelevation nip (driving gear in figure
At the tooth paddy of 51, during pinion rotation, symmetrically, supertension can also be formed at the tooth paddy of driven gear 52, for letter
For the sake of clean description, do not show at accompanying drawing) so that gear shaft and bearing bear bigger shock loading, and make oil temperature raise,
Produce vibration and noise, have a strong impact on the service life of pump.
At present, solution is typically on axle sleeve or side plate along two pitch circle common tangent directions, corresponding to high pressure laminated oil zone
Respectively dig two grooves, referred to as compensating grooves with low pressure oil suction zone position, with this, fluid introduced high pressure laminated oil zone and low pressure oil suction district.
But for guaranteeing the band with root circle, it is to avoid too linking up, compensating groove can not be too near to the center of two gears, also
Meaning that in the rotation process of two gears, compensating groove cannot be always maintained at and close SPACE V and communicate, and this is for supertension
Still effective off-load can not be obtained for the oil pressure in district.
And the present invention is on the basis of existing technology, adding two unloading holes 42, two unloading holes 42 can be all the time with two
Place's superelevation nip keeps communicating, and therefore, the fluid at this can be discharged via unloading hole 42, compensating groove 41 at any time, thus
Effectively reduce the oil pressure at this, improve bearing capacity and the service life of gear oil pump, reduce the noise of gear oil pump；
And the present invention will not destroy the band with root circle, it is to avoid too links up, effectively prevent the volumetric efficiency caused because of leakage
Reduce.
It it is more than one embodiment of the present invention.It should be pointed out that, for the person of ordinary skill of the art, not
On the premise of departing from the principle of the invention, it is also possible to make some deformation and improvement, broadly fall into protection scope of the present invention.
Claims (5)
1. high pressure gear oil pump, including the pump housing (1), two end caps (2) at the two ends being respectively arranged on the pump housing (1) and set
Driving gear shaft (31) in the pump housing (1) and driven gear shaft (32), described driving gear shaft (31) is provided with master
Moving gear (51), described driven gear shaft (32) is provided with driven gear (52), described driving gear (51) and driven
Gear (52) forms engaged transmission, it is characterised in that: the gear ginseng of described driving gear (51) and driven gear (52)
Number is: pressure angle 28 °, centre-to-centre spacing 33mm, 3.25 modulus 10 teeth.
2. high pressure gear oil pump as claimed in claim 1, it is characterised in that: journal diameter is 20mm.
3. high pressure gear oil pump as claimed in claim 1 or 2, it is characterised in that: also include that two are set in driving gear
Axle sleeve (4) on axle (31) and driven gear shaft (32), said two axle sleeve (4) lays respectively at driving gear (51)
Both sides with driven gear (52).
4. high pressure gear oil pump as claimed in claim 3, it is characterised in that: described axle sleeve (4) towards end cap (2)
One side be provided with the seal groove (43) of the figure of three, match with it close is installed in described seal groove (43)
Seal (6).
5. high pressure gear oil pump as claimed in claim 3, it is characterised in that: described sealing ring (6) is provided with " 3 " word
The sealing ring blend stop (61) of shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610291256.1A CN105840976A (en) | 2016-04-29 | 2016-04-29 | High-pressure gear oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610291256.1A CN105840976A (en) | 2016-04-29 | 2016-04-29 | High-pressure gear oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105840976A true CN105840976A (en) | 2016-08-10 |
Family
ID=56590714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610291256.1A Pending CN105840976A (en) | 2016-04-29 | 2016-04-29 | High-pressure gear oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105840976A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29612881U1 (en) * | 1996-07-25 | 1996-09-12 | Fa. Klaus Lütgemeier, 33803 Steinhagen | Oil pump for internal combustion engines |
| CN201232675Y (en) * | 2008-07-23 | 2009-05-06 | 合肥长源液压件有限责任公司 | Bidirectional gear motor |
| CN202811345U (en) * | 2012-09-01 | 2013-03-20 | 合肥长源液压股份有限公司 | Bidirectional gear oil pump with full-hydraulic floating seal-less bidirectional shaft sleeves |
| CN104179632A (en) * | 2014-08-20 | 2014-12-03 | 合肥长源液压股份有限公司 | Bidirectional gear motor |
| CN203978823U (en) * | 2014-08-20 | 2014-12-03 | 合肥长源液压股份有限公司 | High-effect hydraulic full-balance floating buss |
| CN204627981U (en) * | 2015-05-20 | 2015-09-09 | 合肥长源液压股份有限公司 | Be provided with the gear oil pump side plate of damping hole |
| CN204663875U (en) * | 2015-05-20 | 2015-09-23 | 合肥长源液压股份有限公司 | Be provided with the gear oil pump of edge duplex pump body and band damping hole side plate |
| CN205592624U (en) * | 2016-04-29 | 2016-09-21 | 合肥长源液压股份有限公司 | High pressure gear oil pump |
-
2016
- 2016-04-29 CN CN201610291256.1A patent/CN105840976A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29612881U1 (en) * | 1996-07-25 | 1996-09-12 | Fa. Klaus Lütgemeier, 33803 Steinhagen | Oil pump for internal combustion engines |
| CN201232675Y (en) * | 2008-07-23 | 2009-05-06 | 合肥长源液压件有限责任公司 | Bidirectional gear motor |
| CN202811345U (en) * | 2012-09-01 | 2013-03-20 | 合肥长源液压股份有限公司 | Bidirectional gear oil pump with full-hydraulic floating seal-less bidirectional shaft sleeves |
| CN104179632A (en) * | 2014-08-20 | 2014-12-03 | 合肥长源液压股份有限公司 | Bidirectional gear motor |
| CN203978823U (en) * | 2014-08-20 | 2014-12-03 | 合肥长源液压股份有限公司 | High-effect hydraulic full-balance floating buss |
| CN204627981U (en) * | 2015-05-20 | 2015-09-09 | 合肥长源液压股份有限公司 | Be provided with the gear oil pump side plate of damping hole |
| CN204663875U (en) * | 2015-05-20 | 2015-09-23 | 合肥长源液压股份有限公司 | Be provided with the gear oil pump of edge duplex pump body and band damping hole side plate |
| CN205592624U (en) * | 2016-04-29 | 2016-09-21 | 合肥长源液压股份有限公司 | High pressure gear oil pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160810 |