CN204627981U - Be provided with the gear oil pump side plate of damping hole - Google Patents
Be provided with the gear oil pump side plate of damping hole Download PDFInfo
- Publication number
- CN204627981U CN204627981U CN201520329151.1U CN201520329151U CN204627981U CN 204627981 U CN204627981 U CN 204627981U CN 201520329151 U CN201520329151 U CN 201520329151U CN 204627981 U CN204627981 U CN 204627981U
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- China
- Prior art keywords
- side plate
- high pressure
- seal groove
- damping hole
- oil pump
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Abstract
Be provided with the gear oil pump side plate of damping hole, side plate is 8-shaped, the back side of described side plate is provided with the seal groove of ω shape, the back side of described side plate is divided into zone of high pressure and low pressure area by described seal groove, wherein zone of high pressure is positioned at the chimb side of described seal groove, low pressure area is positioned at the concave edge side of described seal groove, the back side of described side plate along Y direction two ends respectively with the center of circle of corresponding circle hole for summit, central angle be β fan section between form sub-high pressure district, the two ends of described seal groove pass described twice zone of high pressure respectively, described side plate is also provided with the damping hole of two through described side plates, the part passing described sub-high pressure district that described damping hole is positioned at described sub-high pressure district and described seal groove surrounds interval.The utility model has can make the hydraulic oil thrust of side plate both ends of the surface stablize, alleviate side plate wearing and tearing, improve high pressure gear oil pump performance, reliability and working life, reduction high pressure gear oil pump the advantage such as starting torque.
Description
Technical field
The utility model relates to gear oil pump field, relates in particular to a kind of gear oil pump side plate being provided with damping hole.
Background technique
Gear oil pump, as the dynamical element of hydraulic system, is at home and abroad widely used in the hydraulic system of the engineering machinery such as loader, excavator, hoist.Gear oil pump has that structure is simple, and volume is little, lightweight, and self-suction is strong, to characteristics such as oil contamination are insensitive, technical field of hydraulic pressure particularly construction machinery industry be widely used.
At present, hydraulic gear oil pump, along with using improving constantly of pressure rating, faces following problem.
One is the radial force that fluid pressure produces.This be due to gear oil pump work time, lower than the oil pressure of oil-discharging cavity, and there is radial clearance between top circle and pump housing internal surface in the oil pressure of oil suction chamber, fluid passes through clearance leakage, from oil-discharging cavity to oil suction chamber, pressure successively decreases step by step, thus there is pressure in the radial direction of gear.
Two is gear oil pumps of conventional design, generally all adopt integrated type to compensate, but low pressure area cannot compensate.Gear transmission moment produces radial force, and the direction of radial force is by the line of contact of gear, and the engaging force acted on driving gear makes power that driving gear folds reduce, acts on the engaging force on driven gear, makes the suffered increase with joint efforts of driven gear.Under high temperature, high pressure, HI high impact working environment, between low pressure area side plate and gear, the hydraulic pressure of friction pair oil film is more uneven because of side plate back side hydraulic thrust.Conventional gear motor, in order to ensure volumetric efficiency, only has the decrement increasing Sealing, makes side plate and the flank of tooth produce local and fits, greatly reduce the mechanical efficiency of gear motor.
Three is conventional gear oil pump sealings, the decrement that main consideration Sealing improves provides sealability, but during high pressure, the fever phenomenon of gear oil pump entirety is comparatively serious, simultaneously, excessive radial force makes the radial clearance of pumping cavity become large, increases the leakage rate of gear oil pump.
Model utility content
Technical problem to be solved in the utility model is to provide a kind of gear oil pump side plate the being provided with damping hole hydraulic oil thrust of side plate both ends of the surface being stablized, alleviates side plate wearing and tearing, improve gear oil pump performance.
In order to solve the problems of the technologies described above, the utility model adopts following technological scheme: the gear oil pump side plate being provided with damping hole, side plate is 8-shaped, the two ends being defined in side plate form two circular holes for the gear shaft by gear oil pump, the straight line being defined through the center of circle of two circular holes of described side plate is Y-axis, through the mid point of the circle center line connecting of two circular holes of described side plate and the straight line perpendicular to Y-axis is X-axis, the back side of described side plate is provided with the seal groove of ω shape, described seal groove is positioned at two circular holes peripheries of described side plate and described seal groove is that symmetry axis is symmetrical with X-axis, the back side of described side plate is divided into zone of high pressure and low pressure area by described seal groove, wherein zone of high pressure is positioned at the chimb side of described seal groove, low pressure area is positioned at the concave edge side of described seal groove, the back side of described side plate along Y direction two ends respectively with the center of circle of corresponding circle hole for summit, central angle be β fan section between form sub-high pressure district, be that symmetry axis is symmetrical with Y-axis between described fan section, the two ends of described seal groove pass described twice zone of high pressure respectively, and the two ends of described seal groove extend to the outer circumferential face of described side plate, described side plate is also provided with the damping hole of two through described side plates, the part passing described sub-high pressure district that described damping hole is positioned at described sub-high pressure district and described seal groove surrounds interval.
Further, the ratio of the Kong Changyu diameter of described damping hole is greater than 4.
Further, the zone of high pressure at the back side of described side plate is provided with two zone of high pressure and draws oil groove, it is that symmetry axis is symmetrical with X-axis that oil groove is drawn in described two zone of high pressure, and the outer circumferential face that one end is communicated with described seal groove, the other end extends to described side plate that oil groove is drawn in described two zone of high pressure.
Further, the front of described side plate is respectively equipped with a circle groove in the orifice edge of described two circular holes, the front of described side plate is also provided with low pressure area and draws oil groove, oil groove is drawn between described two circular holes in described low pressure area, and described two grooves are led at the two ends that oil groove is drawn in described low pressure area respectively.
The beneficial effects of the utility model are:
1. the characteristic of damping hole that the utility model is arranged is change according to oil temperature and changes, gear oil pump is when high-pressure work, sub-high pressure oil is introduced the back side of side plate by damping hole, make the gross thrust at the back side of side plate (Sealing elastic thrust and hydraulic thrust) larger than the hydraulic thrust in the front of side plate, the sub-high pressure oil that damping hole is introduced is with change in pressure, make the dynamic balancing of side plate entirety better, what thus side plate can more effectively balance more fits on the end face of gear, ensure the efficient output of gear oil pump, significantly reduce the decrement of Sealing, the starting torque of gear oil pump is reduced greatly, obtain higher mechanical efficiency.
2. the zone of high pressure that the utility model is arranged is drawn cooperatively interacting between oil groove and damping hole and effectively can be improved the friction pair of side plate and gear; And place of sub-high pressure district obtains the compensation of the hydraulic coupling of dynamic equalization more by damping hole, make the conventional side plate of the thrust ratio at the back side of side plate more balanced, when ensureing sealing, the decrement of Sealing can be greatly reduced, significantly promote the gap that gear oil pump axially coordinates, reduce the starting torque of high pressure gear oil pump, improving product volumetric efficiency, improve the carrying as high pressure gear oil pump and impact resistance.
3. the utility model can make the rated working pressure of gear oil pump reach 28MPa, maximum pressure 31.5MPa, volumetric efficiency >=92%, the excellent performance of time service when having long at meeting working medium temperature 100 DEG C ~ 120 DEG C.
To sum up, the utility model have the hydraulic oil thrust of side plate both ends of the surface can be made to stablize, alleviate side plate wearing and tearing, improve high pressure gear oil pump performance, reliability and working life, reduction high pressure gear oil pump the advantage such as starting torque.
Accompanying drawing explanation
Fig. 1 is the structure schematic diagram of the utility model one embodiment.
Fig. 2 is the Facad structure schematic diagram of the utility model one embodiment.
Fig. 3 is the A-A sectional view of Fig. 1.
Fig. 4 is I place's enlarged view of Fig. 1.
Fig. 5 is II place's enlarged view of Fig. 3.
Being labeled as of each parts in accompanying drawing: 1 side plate, 11 circular holes, 12 seal grooves, 13 zone of high pressure, 14 low pressure areas, 15 sub-high pressure districts, 16 damping holes, 17 zone of high pressure draw oil groove, oil groove is drawn in 18 grooves, 19 low pressure areas.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
See Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5.
The gear oil pump side plate being provided with damping hole of the utility model one embodiment, side plate 1 is in 8-shaped, to form two circular holes 11 for the gear shaft by gear oil pump at the two ends of side plate 1, the straight line being defined through the center of circle of two circular holes 11 of described side plate 1 is Y-axis, through the mid point of the circle center line connecting of two circular holes 11 of described side plate 1 and the straight line perpendicular to Y-axis is X-axis, the back side of described side plate 1 is provided with the seal groove 12 of ω shape, described seal groove 12 is positioned at two circular holes 11 peripheries of described side plate 1 and described seal groove 12 is that symmetry axis is symmetrical with X-axis, the back side of described side plate 1 is divided into zone of high pressure 13 and low pressure area 14 by described seal groove 12, wherein zone of high pressure 13 is positioned at the chimb side of described seal groove 12, low pressure area 14 is positioned at the concave edge side of described seal groove 12, the back side of described side plate 1 along Y direction two ends respectively with the center of circle of corresponding circle hole 11 for summit, central angle be β fan section between form sub-high pressure district 15, be that symmetry axis is symmetrical with Y-axis between described fan section, the two ends of described seal groove 12 pass described twice zone of high pressure 15 respectively, and the two ends of described seal groove 12 extend to the outer circumferential face of described side plate 1, described side plate 1 is also provided with the damping hole 16 of two through described side plates 1, the part passing described sub-high pressure district 15 that described damping hole 16 is positioned at described sub-high pressure district 15 and described seal groove 12 surrounds interval.
The ratio of the Kong Changyu diameter of described damping hole 16 is greater than 4.Adopt this ratio, to form elongated hole, and processing more for convenience, and the flow flowing through damping hole 16 is directly proportional to the pressure reduction before and after damping hole 16, and affects by oil temperature.When having flow to pass through, damping hole 16 adds the damping (power) of runner, makes both sides, hole mineralization pressure poor, and makes rate of flow of fluid sharply change and get off gently, and liquid stream is generally laminar condition when flowing through elongated hole, therefore improve the stability of side plate 1 work.
The zone of high pressure 13 at the back side of described side plate 1 is provided with two zone of high pressure and draws oil groove 17, it is that symmetry axis is symmetrical with X-axis that oil groove 17 is drawn in described two zone of high pressure, and the outer circumferential face that one end is communicated with described seal groove 12, the other end extends to described side plate 1 of oil groove 17 is drawn in described two zone of high pressure.
The front of described side plate 1 is respectively equipped with a circle groove 18 in the orifice edge of described two circular holes 11, the front 1 of described side plate is also provided with low pressure area and draws oil groove 19, oil groove 19 is drawn between described two circular holes 11 in described low pressure area, and described two grooves 18 are led at the two ends that oil groove 19 is drawn in described low pressure area respectively.
Described side plate 1 adopts to be made up of the double-metal layer composite sheet of bronze alloy material and structural carbon steel Q235A Material cladding, and the back side of described side plate 1 is positioned at the one side adopting structural carbon steel Q235A material.This material can make the utility model have good corrosion resistance, wear resistance, thermal diffusivity, machinability and less cubical contraction, ensures that the utility model has good heat dispersion when high pressure, has again higher compressive strength.
General, the central angle β between the fan section in formation sub-high pressure district 15 does not accurately limit, and by calculating gained, the operating mode that gear oil pump uses is different, and β angle is different, threshold values≤60 ° of β in the utility model.
The utility model is at rated pressure 28MPa, when using under the enforcement operating mode of maximum pressure 31.5MPa, damping hole 16 pore size is 1.5mm, and the distance apart from the center of circle of contiguous circular hole 11 is 27.5mm, and the center of circle of damping hole 16 and the angle between the circle center line connecting of contiguous circular hole 11 and Y-axis are 43.5 degree.
The characteristic of damping hole 16 that the utility model is arranged is change according to oil temperature and changes, gear oil pump is when high-pressure work, oil temperature uprises, viscosity, the flow of damping hole 16 just becomes large, sub-high pressure oil is introduced the back side of side plate 1 by damping hole 16, make the gross thrust at the back side of side plate 1 (Sealing elastic thrust and hydraulic thrust) larger than the hydraulic thrust in the front of side plate 1, the sub-high pressure oil that damping hole 16 is introduced is with change in pressure, make the dynamic balancing of side plate 1 entirety better, what thus side plate 1 can more effectively balance more fits on the end face of gear, ensure the efficient output of gear oil pump, significantly reduce the decrement of Sealing, the starting torque of gear oil pump is reduced greatly, obtain higher mechanical efficiency.
The friction pair that cooperatively interacting between oil groove 17 and damping hole 16 effectively can improve side plate 1 and gear is drawn in the zone of high pressure that the utility model is arranged.During gear oil pump work, side plate 1 cylindrical spoke and the gear oil pump pump housing inwall of sub-high pressure district 15 and side, low pressure area 14 are fitted, the heat that this place produces can be taken away by the fluid of damping hole 16, reduce the too much heat energy produced when side plate 1 is fitted with gear oil pump pump housing inwall; Place of sub-high pressure district 15 obtains the compensation of the hydraulic coupling of dynamic equalization more by damping hole 16, make the conventional side plate of the thrust ratio at the back side of side plate 1 more balanced, when ensureing sealing, the decrement of Sealing can be greatly reduced, significantly promote the gap that gear oil pump axially coordinates, reduce the starting torque of high pressure gear oil pump, improving product volumetric efficiency, improve the carrying as high pressure gear oil pump and impact resistance.
The groove 18 in the utility model side plate 1 front and low pressure area are drawn oil groove 19 and are designed, the vacuum formed when being out of gear engagement can be utilized to realize the self-priming lubrication of low pressure oil, both the condition that (the filler opening side of gear oil pump) oil film is formed was improved, good lubrication and cooling effect can be played to side plate 1 and gear face again, reduce the loss of high pressure oil and improve the volumetric efficiency of pump.
When installing the utility model and being provided with the gear oil pump side plate of damping hole, side plate 1 cylindrical is the process of size amount of decrease, reduces side plate 1 liang of outside diameter value, reduces the radius value of β angle, sub-high pressure district place circular arc.Side plate 1 after amount of decrease, increase the gap width with gear oil pump pump housing inwall, one-sided gap delta is 2.5 times of conventional middle high-pressure gear oil-pump, has both ensured the generation of oil film between side plate 1 cylindrical spoke place and pump housing Eight characters hole, and has been beneficial to again the exchange of heat between gear and side plate 1.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. be provided with the gear oil pump side plate of damping hole, side plate (1) is in 8-shaped, to form two circular holes for the gear shaft by gear oil pump (11) at the two ends of side plate (1), it is characterized in that: the straight line being defined through the center of circle of two circular holes (11) of described side plate (1) is Y-axis, through the mid point of the circle center line connecting of two circular holes (11) of described side plate (1) and the straight line perpendicular to Y-axis is X-axis, the back side of described side plate (1) is provided with the seal groove (12) of ω shape, described seal groove (12) is positioned at two circular holes (11) peripheries of described side plate (1) and described seal groove (12) is that symmetry axis is symmetrical with X-axis, the back side of described side plate (1) is divided into zone of high pressure (13) and low pressure area (14) by described seal groove (12), wherein zone of high pressure (13) are positioned at the chimb side of described seal groove (12), low pressure area (14) is positioned at the concave edge side of described seal groove (12), the back side of described side plate (1) along Y direction two ends respectively with the center of circle of corresponding circle hole (11) for summit, central angle be β fan section between form sub-high pressure district (15), be that symmetry axis is symmetrical with Y-axis between described fan section, the two ends of described seal groove (12) pass described twice zone of high pressure (15) respectively, and the two ends of described seal groove (12) extend to the outer circumferential face of described side plate (1), described side plate (1) is also provided with the damping hole (16) of two through described side plates (1), the part passing described sub-high pressure district (15) that described damping hole (16) is positioned at described sub-high pressure district (15) and described seal groove (12) surrounds interval.
2. be provided with the gear oil pump side plate of damping hole as claimed in claim 1, it is characterized in that: the ratio of the Kong Changyu diameter of described damping hole (16) is greater than 4.
3. be provided with the gear oil pump side plate of damping hole as claimed in claim 1 or 2, it is characterized in that: the zone of high pressure (13) at the back side of described side plate (1) is provided with two zone of high pressure and draws oil groove (17), it is that symmetry axis is symmetrical with X-axis that oil groove (17) is drawn in described two zone of high pressure, and the outer circumferential face that one end is communicated with described seal groove (12), the other end extends to described side plate (1) of oil groove (17) is drawn in described two zone of high pressure.
4. be provided with the gear oil pump side plate of damping hole as claimed in claim 1 or 2, it is characterized in that: the front of described side plate (1) is respectively equipped with a circle groove (18) in the orifice edge of described two circular holes (11), the front (1) of described side plate is also provided with low pressure area and draws oil groove (19), described low pressure area is drawn oil groove (19) and is positioned between described two circular holes (11), and described two grooves (18) are led at the two ends that oil groove (19) is drawn in described low pressure area respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520329151.1U CN204627981U (en) | 2015-05-20 | 2015-05-20 | Be provided with the gear oil pump side plate of damping hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520329151.1U CN204627981U (en) | 2015-05-20 | 2015-05-20 | Be provided with the gear oil pump side plate of damping hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204627981U true CN204627981U (en) | 2015-09-09 |
Family
ID=54047018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520329151.1U Expired - Fee Related CN204627981U (en) | 2015-05-20 | 2015-05-20 | Be provided with the gear oil pump side plate of damping hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204627981U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832429A (en) * | 2015-05-20 | 2015-08-12 | 合肥长源液压股份有限公司 | Gear oil pump side plate provided with damping holes |
| CN105840976A (en) * | 2016-04-29 | 2016-08-10 | 合肥长源液压股份有限公司 | High-pressure gear oil pump |
-
2015
- 2015-05-20 CN CN201520329151.1U patent/CN204627981U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832429A (en) * | 2015-05-20 | 2015-08-12 | 合肥长源液压股份有限公司 | Gear oil pump side plate provided with damping holes |
| CN104832429B (en) * | 2015-05-20 | 2017-09-29 | 合肥长源液压股份有限公司 | Gear oil pump side plate provided with damping hole |
| CN105840976A (en) * | 2016-04-29 | 2016-08-10 | 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 |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 Termination date: 20180520 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |