CN104832429B - Gear oil pump side plate provided with damping hole - Google Patents
Gear oil pump side plate provided with damping hole Download PDFInfo
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- CN104832429B CN104832429B CN201510260282.3A CN201510260282A CN104832429B CN 104832429 B CN104832429 B CN 104832429B CN 201510260282 A CN201510260282 A CN 201510260282A CN 104832429 B CN104832429 B CN 104832429B
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- side plate
- seal groove
- oil pump
- damping hole
- groove
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Abstract
Gear oil pump side plate provided with damping hole, side plate is in 8-shaped, the back side of the side plate is provided with the seal groove of ω shapes, the back side of the side plate is divided into higher-pressure region and low-pressure area by the seal groove, wherein higher-pressure region is located at the chimb side of the seal groove, low-pressure area is located at the concave edge side of the seal groove, two ends of the back side of the side plate along Y direction are respectively using the center of circle of corresponding circle hole as summit, central angle forms sub-high pressure area for β sector interval, the two ends of the seal groove pass the higher-pressure region twice respectively, the damping hole of side plate described in two insertions is additionally provided with the side plate, the damping hole is located at the sub-high pressure area and the part for passing the sub-high pressure area of the seal groove and surrounds interval.The present invention has the advantages that to make the hydraulic oil thrust of side plate both ends of the surface is stable, mitigate side plate wear and tear, improve high pressure gear oil pump performance, reliability and service life, reduce the starting torque of high pressure gear oil pump.
Description
Technical field
The present invention relates to gear oil pump field, a kind of gear oil pump side plate provided with damping hole is related in particular to.
Background technology
Gear oil pump is at home and abroad widely used in loading machine, excavator, crane as the dynamical element of hydraulic system
In hydraulic system etc. engineering machinery.Gear oil pump has simple in construction, small volume, lightweight, and self-suction is strong, to oil contamination
The characteristic such as insensitive, is widely used in technical field of hydraulic pressure particularly construction machinery industry.
At present, hydraulic gear oil pump faces following problem with the continuous improvement using pressure rating.
One is the radial load that fluid pressure is produced.When this is due to gear oil pump work, the oil pressure of oil suction chamber is less than oil extraction
There is radial clearance between the oil pressure of chamber, and outside circle and pump housing inner surface, fluid is by clearance leakage, from oil-discharging cavity to entering
Oil pocket, pressure successively decreases step by step, so that the radial direction in gear has pressure.
Two be the gear oil pump of conventional design, is typically all compensated using monoblock type, but low-pressure area can not be compensated.Gear
Driving torque produces radial load, and the direction of radial load is by the path of contact of gear, and the engagement force acted on driving gear makes master
Moving gear is suffered to make a concerted effort to reduce, and the engagement force acted on driven gear makes driven gear is suffered to make a concerted effort to increase.In high temperature, height
Pressure, under HI high impact working environment, between low-pressure area side plate and gear the hydraulic pressure of friction pair oil film because of side plate back side hydraulic thrust more
Plus it is uneven.Conventional gear motor only increases the decrement of seal to ensure volumetric efficiency, side plate is produced with the flank of tooth
Raw local laminating, greatly reduces the mechanical efficiency of gear motor.
Three be conventional gear oil pump sealing, mainly considers the decrement of seal raising to provide sealing property, but high
The overall fever phenomenon of gear oil pump is more serious during pressure, meanwhile, excessive radial load causes the radial clearance of pumping cavity to become big,
Increase the leakage rate of gear oil pump.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of hydraulic oil thrust stabilization for making side plate both ends of the surface, mitigation
Side plate abrasion, the gear oil pump side plate provided with damping hole for improving gear oil pump performance.
In order to solve the above-mentioned technical problem, the present invention is adopted the following technical scheme that：Gear oil pump side plate provided with damping hole,
Side plate is in 8-shaped, and the two ends for being defined on side plate form two circular holes for being used to pass through the gear shaft of gear oil pump, are defined through institute
State two circular holes of side plate the center of circle straight line be Y-axis, by the circle center line connecting of two circular holes of the side plate midpoint and hang down
The straight straight line in Y-axis is X-axis, and the back side of the side plate is provided with the seal groove of ω shapes, and the seal groove is located at the side plate
Two circular holes it is peripheral and the seal groove is symmetrical by symmetry axis of X-axis, the seal groove is by the side plate
The back side is divided into higher-pressure region and low-pressure area, and wherein higher-pressure region is located at the chimb side of the seal groove, and low-pressure area is located at described close
The concave edge side of seal groove, the two ends of the back side of the side plate along Y direction respectively by summit of the center of circle of corresponding circle hole, the center of circle
Angle forms sub-high pressure area for β sector interval, described fan-shaped interval symmetrical by symmetry axis of Y-axis, the seal groove
Two ends pass the higher-pressure region twice respectively, and the two ends of the seal groove extend to the outer peripheral face of the side plate, described
The damping hole of side plate described in two insertions is additionally provided with side plate, the damping hole is located at the sub-high pressure area and the seal groove
The part for passing the sub-high pressure area surround interval.
Further, the ratio of the Kong Changyu diameters of the damping hole is more than 4.
Further, oil groove is drawn in the higher-pressure region at the back side of the side plate provided with two higher-pressure regions, and described two higher-pressure regions are drawn
Oil groove is symmetrical by symmetry axis of X-axis, and described two higher-pressure regions draw oil groove one end connected with the seal groove, it is another
One end extends to the outer peripheral face of the side plate.
Further, the front of the side plate is respectively equipped with a circle groove in the orifice edge of described two circular holes, described
The front of side plate is additionally provided with low-pressure area and draws oil groove, and the low-pressure area draws oil groove between described two circular holes, and described low
The two ends that nip draws oil groove respectively lead to two groove.
Beneficial effects of the present invention are：
1. the characteristic for the damping hole that the present invention is set is changed according to the change of oil temperature, gear oil pump is in high-pressure work
When, damping hole introduces sub-high pressure oil at the back side of side plate so that gross thrust (seal elastic thrust and the hydraulic pressure at the back side of side plate
Thrust) it is bigger than the positive hydraulic thrust of side plate, the sub-high pressure oil that damping hole is introduced is with change in pressure so that side plate
Overall dynamic balancing is more preferable, thus on the more efficient end face for fitting to gear more balanced of side plate energy, it is ensured that gear oil pump
Efficient output, the decrement of seal is greatly reduced, the starting torque of gear oil pump is substantially reduced, higher machine is obtained
Tool efficiency.
2. the mutual cooperation that the higher-pressure region that the present invention is set is drawn between oil groove and damping hole can effectively improve side plate and tooth
The friction pair of wheel；And the compensation of the more hydraulic coupling of dynamic equalization is obtained at sub-high pressure area by damping hole, makes side plate
The conventional side plate of the thrust ratio at the back side is more balanced, in the case of ensureing sealedly, can greatly reduce the decrement of seal, greatly
The gap that the lifting gear oil pump of width is axially engaged, reduces the starting torque of high pressure gear oil pump, lifts product volumetric efficiency,
Improve the carrying as high pressure gear oil pump and impact resistance.
3. the present invention can make the rated operating pressure of gear oil pump reach 28MPa, maximum pressure 31.5MPa, volumetric efficiency
>=92%, the excellent performance with time service when meeting long at 100 DEG C~120 DEG C of working media temperature.
To sum up, the present invention, which has, can make the hydraulic oil thrust of side plate both ends of the surface is stable, mitigate side plate to wear and tear, improve high knob
The advantages of taking turns oil pump performance, reliability and service life, reduce the starting torque of high pressure gear oil pump.
Brief description of the drawings
Fig. 1 is the structure schematic diagram of one embodiment of the invention.
Fig. 2 is the positive structure schematic of one embodiment of the invention.
Fig. 3 is Fig. 1 A-A sectional views.
Fig. 4 is enlarged drawing at the I of Fig. 1.
Fig. 5 is enlarged drawing at the II of Fig. 3.
In accompanying drawing the mark of each part for：It is 1 side plate, 11 circular holes, 12 seal grooves, 13 higher-pressure regions, 14 low-pressure areas, high 15 times
Nip, 16 damping holes, 17 higher-pressure regions draw oil groove, 18 grooves, 19 low-pressure areas and draw oil groove.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings：
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5.
The gear oil pump side plate provided with damping hole of one embodiment of the invention, side plate 1 is in 8-shaped, with the two ends of side plate 1
Forming two is used for the circular hole 11 of the gear shaft by gear oil pump, is defined through the center of circle of two circular holes 11 of the side plate 1
Straight line be Y-axis, the midpoint by the circle center line connecting of two circular holes 11 of the side plate 1 and the straight line perpendicular to Y-axis are X-axis,
The back side of the side plate 1 is provided with the seal groove 12 of ω shapes, and the seal groove 12 is located at outside two circular holes 11 of the side plate 1
Enclose and the seal groove 12 is symmetrical by symmetry axis of X-axis, the seal groove 12 splits the back side of the side plate 1
Into higher-pressure region 13 and low-pressure area 14, wherein higher-pressure region 13 is located at the chimb side of the seal groove 12, and low-pressure area 14 is located at described
The concave edge side of seal groove 12, the two ends of the back side of the side plate 1 along Y direction are respectively using the center of circle of corresponding circle hole 11 as top
Point, central angle form sub-high pressure area 15 for β sector interval, described fan-shaped interval symmetrical by symmetry axis of Y-axis, described close
The two ends of seal groove 12 pass higher-pressure region 15, and the two ends of the seal groove 12 extend to the side plate twice respectively
The damping hole 16 of side plate 1 described in two insertions is additionally provided with 1 outer peripheral face, the side plate 1, the damping hole 16 is located at described time
Higher-pressure region 15 and the part for passing the sub-high pressure area 15 of the seal groove 12 surround interval.
The ratio of the Kong Changyu diameters of the damping hole 16 is more than 4.Using this ratio, to form elongated hole, and process
More convenient, the flow for flowing through damping hole 16 is directly proportional to the pressure difference before and after damping hole 16, and is influenceed by oil temperature.There is flow to pass through
When, damping hole 16 adds the damping (power) of runner so that hole both sides formed pressure differential, and cause rate of flow of fluid drastically change and
Liquid stream generally laminar condition when gently getting off, and flowing through elongated hole, therefore improve the stability that side plate 1 works.
Oil groove 17 is drawn in the higher-pressure region 13 at the back side of the side plate 1 provided with two higher-pressure regions, and oil groove is drawn in described two higher-pressure regions
17 is symmetrical by symmetry axis of X-axis, and described two higher-pressure regions draw oil groove 17 one end connected with the seal groove 12,
The other end extends to the outer peripheral face of the side plate 1.
The front of the side plate 1 is respectively equipped with a circle groove 18, the side plate in the orifice edge of described two circular holes 11
Front 1 be additionally provided with low-pressure area and draw oil groove 19, the low-pressure area draws oil groove 19 between described two circular holes 11, and described
The two ends that low-pressure area draws oil groove 19 respectively lead to two groove 18.
The side plate 1 is used and answered by the double-metal layer of bronze alloy material and carbon structural steels Q235A Material claddings
Plywood is made, and the back side of the side plate 1 is located at the one side using carbon structural steels Q235A materials.This material can send out this
It is bright that there is good corrosion resistance, wearability, thermal diffusivity, machinability and less cubical contraction, it is ensured that the present invention is in height
With good heat dispersion during pressure, there is higher compressive resistance again.
General, the central angle β for forming the sector interval in sub-high pressure area 15 is not limit accurately, can be by calculating
, the operating mode that gear oil pump is used is different, and β angles are different, β threshold value≤60 ° in the present invention.
The present invention is under rated pressure 28MPa, maximum pressure 31.5MPa implementation operating mode in use, the aperture of damping hole 16
Size is 1.5mm, and the distance in the center of circle away from neighbouring circular hole 11 is 27.5mm, the center of circle of damping hole 16 and neighbouring circular hole 11 center of circle
Angle between line and Y-axis is 43.5 degree.
The characteristic for the damping hole 16 that the present invention is set is changed according to the change of oil temperature, and gear oil pump is in high-pressure work
When, oil temperature is uprised, viscosity, and the flow of damping hole 16 just becomes big, and damping hole 16 introduces sub-high pressure oil at the back side of side plate 1,
So that the gross thrust (seal elastic thrust and hydraulic thrust) at the back side of side plate 1 is bigger than the positive hydraulic thrust of side plate 1,
The sub-high pressure oil that damping hole 16 is introduced is with change in pressure so that the overall dynamic balancing of side plate 1 is more preferable, thus the energy of side plate 1
On the more efficient end face for fitting to gear more balanced, it is ensured that the efficient output of gear oil pump, seal is greatly reduced
Decrement, substantially reduce the starting torque of gear oil pump, obtain higher mechanical efficiency.
The mutual cooperation that the higher-pressure region that the present invention is set is drawn between oil groove 17 and damping hole 16 can effectively improve side plate 1 with
The friction pair of gear.When gear oil pump works, the cylindrical spoke of side plate 1 and gear oil pump pump in sub-high pressure area 15 and the side of low-pressure area 14
Internal wall laminating, can be taken away the heat produced at this by the fluid of damping hole 16, in reduction side plate 1 and the gear oil pump pump housing
The excessive heat energy that wall is produced when fitting；The benefit of the more hydraulic coupling of dynamic equalization is obtained at sub-high pressure area 15 by damping hole 16
Repay, make the conventional side plate of thrust ratio at the back side of side plate 1 more balanced, in the case of ensureing sealedly, sealing can be greatly reduced
The decrement of part, significantly lifts the gap that gear oil pump is axially engaged, reduces the starting torque of high pressure gear oil pump, lifted
Product volumetric efficiency, improves the carrying as high pressure gear oil pump and impact resistance.
The positive groove 18 of side plate 1 and low-pressure area of the present invention draw oil groove 19 and designed, it is possible to use be out of gear shape when engaging
Into vacuum realize the self-priming lubrication of low pressure oil, both improved the condition of (the oil inlet side of gear oil pump) oil film formation, and can be right
Side plate 1 and gear face play good lubrication and cooling effect, reduce the loss of hydraulic oil and improve the volume effect of pump
Rate.
When installing gear oil pump side plate of the present invention provided with damping hole, side plate 1 is cylindrical to be handled for size amount of decrease, reduces side
1 liang of outside diameter value of plate, reduces the radius value of circular arc at sub-high pressure area β angles.Side plate 1 after amount of decrease, increase and gear oil pump pump
The gap width of internal wall, unilateral gap delta is 2.5 times of conventional middle high-pressure gear oil-pump, both ensured at the cylindrical spoke of side plate 1 with
The generation of oil film between the word hole of the pump housing eight, is beneficial to exchanging for gear and 1 heat of side plate again.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Any modifications, equivalent substitutions and improvements made within principle etc., should be included in the scope of the protection.
Claims (4)
1. the gear oil pump side plate provided with damping hole, side plate (1) is in 8-shaped, it is used to lead to form two at the two ends of side plate (1)
Cross the circular hole (11) of the gear shaft of gear oil pump, it is characterised in that：It is defined through the circle of two circular holes (11) of the side plate (1)
The straight line of the heart be Y-axis, by the circle center line connecting of two circular holes (11) of the side plate (1) midpoint and perpendicular to the straight line of Y-axis
For X-axis, the back side of the side plate (1) is provided with the seal groove (12) of ω shapes, and the seal groove (12) is located at the side plate (1)
Two circular holes (11) it is peripheral and the seal groove (12) is symmetrical by symmetry axis of X-axis, the seal groove (12)
The back side of the side plate (1) is divided into higher-pressure region (13) and low-pressure area (14), wherein higher-pressure region (13) are positioned at the sealing ring
The chimb side of groove (12), low-pressure area (14) is located at the concave edge side of the seal groove (12), and the back side of the side plate (1) is along Y-axis
The two ends in direction are taking respectively summit, central angle as the β interval formation sub-high pressure area of sector of the center of circle of corresponding circle hole (11)
(15), fan-shaped interval, β threshold value≤60 ° symmetrical by symmetry axis of Y-axis, the two ends point of the seal groove (12)
Do not pass sub-high pressure area (15) described in two, and the two ends of the seal groove (12) extend to the outer peripheral face of the side plate (1),
The damping hole (16) of side plate (1) described in two insertions is additionally provided with the side plate (1), the damping hole (16) is located at high described time
The interval that the part for passing the sub-high pressure area (15) of nip (15) and the seal groove (12) is surrounded, the side plate
(1) use and be made up of the double-metal layer composite plate of bronze alloy material and carbon structural steels Q235A Material claddings, the side
The back side of plate (1) is located at the one side using carbon structural steels Q235A materials.
2. the gear oil pump side plate of damping hole is provided with as claimed in claim 1, it is characterised in that：The hole of the damping hole (16)
The long ratio with diameter is more than 4.
3. the gear oil pump side plate of damping hole is provided with as claimed in claim 1 or 2, it is characterised in that：The back of the body of the side plate (1)
Oil groove (17) is drawn in the higher-pressure region (13) in face provided with two higher-pressure regions, and oil groove (17) is drawn using X-axis as symmetry axis in described two higher-pressure regions
It is symmetrical, and described two higher-pressure regions draw oil groove (17) one end connected with the seal groove (12), the other end extension
To the outer peripheral face of the side plate (1).
4. the gear oil pump side plate of damping hole is provided with as claimed in claim 1 or 2, it is characterised in that：The side plate (1) is just
Face is respectively equipped with a circle groove (18) in the orifice edge of described two circular holes (11), and the front (1) of the side plate is additionally provided with low
Nip draws oil groove (19), and the low-pressure area draws oil groove (19) between described two circular holes (11), and the low-pressure area draws
The two ends of oil groove (19) respectively lead to groove described in two (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260282.3A CN104832429B (en) | 2015-05-20 | 2015-05-20 | Gear oil pump side plate provided with damping hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260282.3A CN104832429B (en) | 2015-05-20 | 2015-05-20 | Gear oil pump side plate provided with damping hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104832429A CN104832429A (en) | 2015-08-12 |
| CN104832429B true CN104832429B (en) | 2017-09-29 |
Family
ID=53810545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510260282.3A Active CN104832429B (en) | 2015-05-20 | 2015-05-20 | Gear oil pump side plate provided with damping hole |
Country Status (1)
| Country | Link |
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| CN (1) | CN104832429B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653868A (en) * | 2019-01-23 | 2019-04-19 | 福建江夏学院 | A kind of high pressure integration pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202284539U (en) * | 2011-10-31 | 2012-06-27 | 泊姆克(天津)液压有限公司 | Double-axial gap self compensating high pressure gear pump |
| CN202560557U (en) * | 2012-05-22 | 2012-11-28 | 合肥长源液压股份有限公司 | Circumferential local asymmetrical side plate for gear oil pump |
| CN203404068U (en) * | 2013-05-17 | 2014-01-22 | 山东华伟液压设备制造有限公司 | Hydraulic gear pump |
| CN103591021A (en) * | 2013-09-30 | 2014-02-19 | 同济大学 | Floating side plate for high-pressure large-displacement gear pump |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55107092A (en) * | 1979-02-06 | 1980-08-16 | Kayaba Ind Co Ltd | Loading device for gear pump |
| JPS6114489A (en) * | 1984-06-29 | 1986-01-22 | Kayaba Ind Co Ltd | Gear pump or motor |
-
2015
- 2015-05-20 CN CN201510260282.3A patent/CN104832429B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202284539U (en) * | 2011-10-31 | 2012-06-27 | 泊姆克(天津)液压有限公司 | Double-axial gap self compensating high pressure gear pump |
| CN202560557U (en) * | 2012-05-22 | 2012-11-28 | 合肥长源液压股份有限公司 | Circumferential local asymmetrical side plate for gear oil pump |
| CN203404068U (en) * | 2013-05-17 | 2014-01-22 | 山东华伟液压设备制造有限公司 | Hydraulic gear pump |
| CN103591021A (en) * | 2013-09-30 | 2014-02-19 | 同济大学 | Floating side plate for high-pressure large-displacement gear pump |
| 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 |
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| Publication number | Publication date |
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| CN104832429A (en) | 2015-08-12 |
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