CN103206375A - Novel floating side plate for high-pressure large-displacement gear pump - Google Patents
Novel floating side plate for high-pressure large-displacement gear pump Download PDFInfo
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- CN103206375A CN103206375A CN2013101185301A CN201310118530A CN103206375A CN 103206375 A CN103206375 A CN 103206375A CN 2013101185301 A CN2013101185301 A CN 2013101185301A CN 201310118530 A CN201310118530 A CN 201310118530A CN 103206375 A CN103206375 A CN 103206375A
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Abstract
The invention discloses a novel floating side plate structure used for a high-pressure large-displacement gear pump. The floating side plate comprises a side plate body, an unloading groove arranged on the back pushing surface of the side plate body, an oil passing hole, a driving gear shaft hole, a driven gear shaft hole and a compensation force groove arranged on the compensation surface of the floating side plate, wherein the back pushing surface of the floating side plate is also provided with an ear-shaped high-pressure oil groove, the ear-shaped high-pressure oil groove comprises two sets of arc-shaped grooves which are symmetrically arranged by taking a horizontal transverse shaft as a center, the central inflection point of the joint of two sets of arc-shaped grooves and the oil passing hole are arranged concentrically and is communicated with the oil passing hole, and end parts of two ends of the arc-shaped grooves are all located on one side of an oil absorption cavity. The floating side plate disclosed by the invention adopts the mode that the ear-shaped high-pressure oil groove is arranged on the back pushing surface of the side plate to enlarge a high-pressure area to one side of a low-pressure area of the side plate, so as to reduce the radial force born by a bearing; and by arranging a V-shaped damping groove structure on the end part of the high-pressure oil groove, the pressure of a transition area of the side plate is improved, the pressure gradient of the transition area is improved, and the service life of the gear pump is prolonged.
Description
Technical field
The invention belongs to parts of external gear pump, be specifically related to a kind of floating side plate.
Background technique
Gear pump has simple in structurely because of it, and volume is little, in light weight, suction capacity strong, to advantages such as oil contamination are insensitive, so in the hydraulics field particularly construction machinery industry have extensive use.It is widely used in the hydraulic system of engineering machinery such as fork truck, hoist, loader, bulldozer as the hydraulic system dynamical element.At present, main engine factory's (as loader, hoist, bulldozer, excavator etc.) are more and more higher to gear pump delivery, pressure rating and requirement in working life both at home and abroad.The heavy wear of gear pump side-plank (burning the side plate problem) is one of key factor that influences its life-span.
What middle part sealed type gear pump adopted in axial seal is the hydraulic floating collocation structure of figure of eight side plate, i.e. all-hydraulic floating compensation structure.This all-hydraulic floating compensation is owing to can compensate the expanding with heat and contract with cold of the flexible deformation of gear shaft, material, the machining error of part, the wearing and tearing of part etc., can make the axial seal of gear pump keep the optimum state, having advance than the gear pump of fixed interval (FI) and a kind of flexible compensation gear pump that relies on material deformation to compensate, is one of direction of gear pump technical development.
Though finalized the design production for many years with all-hydraulic floating side plate as the gear pump of axial seal, but the existing all-hydraulic floating side plate gear pump of high-pressure large-displacement ubiquity radial pressure is difficult to balance, the sudden change of side plate local compression is excessive, problems such as wearing and tearing and well damage, these situations have seriously restricted the gear pump performance.In sum, the equilibrium problem of all-hydraulic floating compensation side plate, namely " burning side plate " problem is one of technical barrier of gear pump industry.Therefore must adopt rational floating side plate structure, solve the high-pressure large-displacement gear pump and burn the side plate problem, improve gear pump working life.
Summary of the invention
The objective of the invention is at the ubiquitous all-hydraulic floating side plate equilibrium problem of above gear pump industry, a kind of novel floating side plate structure that is applicable to the high-pressure large-displacement gear pump is proposed, pressure jump when having reduced the radial force of gear pump bearing effectively and having reduced from the gear pump transition zone to the zone of high pressure transition, make the hydraulic oil thrust of side plate both ends of the surface stable, have and alleviate the side plate wearing and tearing and improve the gear pump good result in working life.
For achieving the above object, solution of the present invention is:
A kind of floating side plate for the high-pressure large-displacement gear pump, comprise the side plate body, be located at the anti-compensating groove that pushes away on the face of described side plate body, oil-through hole, driving gear axis hole and driven gear axis hole and the equilibrant force groove of being located at described floating side plate complementary area, counter the pushing away of described floating side plate also is provided with ear type high pressure oil groove on the face, described ear type high pressure oil groove comprises symmetrically arranged two groups of curve baths centered by horizontal cross shaft, the center flex point of two groups of curve bath joints arranges with described oil-through hole is concentric, and be communicated with described oil-through hole, oil sucting cavity one side that end, curve bath two ends all is positioned at, expand the zone of high pressure low pressure area one side of side plate to, reduce the bearing force in radial.
The central angle angle [alpha] scope of described driving gear curve bath correspondence is 210 °～230 °, the central angle angle [alpha] of described driven gear curve bath correspondence ' scope is 210 °～230 °.
Described is 27.0 ° through the straight line of center flex point and the main gear shaft hole circle heart and the angle of the angle β between the vertical longitudinal axis; Described is 27.0 ° through the center flex point and from the straight line of the gear shaft hole circle heart and the angle of the angle β ' between the vertical longitudinal axis.
The end of described ear type high pressure oil groove is respectively equipped with the damping slot structure, and described damping slot structure is arranged in transition zone, and described high pressure oil groove is communicated with described damping slot structure.
Described damping slot structure is V-type damping slot structure.
The V-type damping slot structure bottom land width L of described driving gear place is 1.0mm～2.5mm, the V-type damping slot structure bottom land width L' of described driven gear place is 1.0mm～2.0mm, the described main gear shaft hole circle heart respectively and the angle angle γ scope between two straight lines that form of described V-type damping slot two-end-point be 15.0 °～25.0 °, from the gear shaft hole circle heart respectively and angle angle γ ' the scope between two straight lines that form of described V-type damping slot two-end-point be 15.0 °～20.0 °.
Described equilibrant force groove is the ear connected in star.
Because adopt such scheme, the beneficial effect of patent of the present invention is:
1. gear pump goes out the oil pocket high pressure oil and will extrude the chamber by the ear type high pressure oil groove at the side plate sealing surface and expand the oil sucting cavity side to, in the gear pump working procedure, guarantee that 2 teeth play sealing between the height nip, effectively reduce the gear shaft force in radial, improved the working life of bearing.
2. the transition zone between the height nip increases gradual change shape V-type damping slot structure, to improve the pressure gradient between transition zone and the zone of high pressure, makes transition zone slow down to the pressure jump gradient of high pressure transition zone.Can alleviate the side plate vibration so that gear face is stable to the reaction thrust of side plate like this, avoid side plate to produce tilting moment, thereby reduce side plate wearing and tearing and cavitation erosion.
Description of drawings
Fig. 1 is the anti-face structural representation that pushes away of floating side plate in the illustrated embodiment of the present invention;
Fig. 2 is the sectional view of mesohigh oil groove embodiment illustrated in fig. 1;
Fig. 3 is middle floating side plate complementary area structural representation embodiment illustrated in fig. 1;
Fig. 4 is the sectional view of middle equilibrant force groove embodiment illustrated in fig. 3;
Fig. 5 is gear pump assembling schematic representation;
Fig. 6 is V-type groove structural representation in the illustrated embodiment of the present invention;
Fig. 7 be shown in Figure 6 in the A-A of V-type groove structural representation to sectional view;
Fig. 8 be shown in Figure 6 in the B-B of V-type groove structural representation to sectional view;
Fig. 9 is existing gear pump transition zone flow schematic representation;
Figure 10 is for using patent gear pump transition zone flow schematic representation of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawing illustrated embodiment.
As depicted in figs. 1 and 2, a kind of floating side plate for the high-pressure large-displacement gear pump, comprise the side plate body, be located at the anti-compensating groove 3 that pushes away on the face of side plate body, oil-through hole 5, driving gear axis hole and driven gear axis hole and the equilibrant force groove 6 of being located at the floating side plate complementary area, counter the pushing away of floating side plate also is provided with ear type high pressure oil groove 1 on the face, ear type high pressure oil groove comprises symmetrically arranged two groups of curve baths centered by transverse axis, the center flex point of two groups of curve bath joints and oil-through hole 5 concentric settings, and be communicated with oil-through hole, oil sucting cavity one side that end, curve bath two ends all is positioned at, expand the zone of high pressure low pressure area one side of side plate to, reduce the bearing force in radial.
In the present embodiment, the central angle angle [alpha] scope of driving gear curve bath correspondence is 210 °～230 °, the central angle angle [alpha] of driven gear curve bath correspondence ' scope also is 210 °～230 °.Through the straight line of center flex point and the main gear shaft hole circle heart and vertically the angle of the angle β between the longitudinal axis be 27.0 °; Through the center flex point and from the straight line of the gear shaft hole circle heart and vertically the angle of the angle β ' between the longitudinal axis be 27.0 °.
Floating side plate is counter to be pushed away when not driving high pressure oil groove 1 on the face, and gear pump oil outlet hyperbaric chamber successively decreases to the linear substantially rule of pressure between the inlet port low-pressure cavity.Open ear type high pressure oil 1 at the anti-face that pushes away of side plate, during gear pump work, go out the oil pocket high pressure oil and will go out oil sucting cavity one side that the oil pocket high pressure oil expands high pressure oil groove 1 end to by ear type high pressure oil groove 1, enlarge the gear pump zone of high pressure.Have only two teeth to seal in the working procedure, reduce bearing and the suffered radial force of gear shaft.
As shown in Figure 5, the high pressure oil that goes out oil pocket is incorporated into side plate complementary area one side by oil-through hole 5, it is equilibrant force that fluid enters into the oil closed cavity generation hydraulic coupling that is formed by ear RunddichtringO 7, ear type catch 8 and side plate equilibrant force groove 6 behind this pressure compensation face, and side plate is pressed on gear face.The suffered equilibrant force of side plate mainly is made up of with pretightening force two-part of seal ring 7 hydraulic coupling and ear shape catch 8 that high pressure oil produces, and suffered reaction thrust is made up of the active force that the hydraulic oil in the gear face gap produces.Side plate makes side plate be pressed in gear face under the effect that reaction thrust and equilibrant force are made a concerted effort, and guarantees that the axial seal of gear pump remains the optimum state.
As shown in Figure 7 and Figure 8, the end, two ends of high pressure oil groove 1 also is respectively equipped with damping slot structure 2, and in the transition zone of damping slot structure 2 between the height nip, high pressure oil groove 1 is communicated with damping slot structure 2.In the present embodiment, damping slot structure 2 is gradual change shape V-type damping slot structure, the V-type damping slot structure bottom land width L of driving gear place is 1.0mm～2.5mm, the V-type damping slot structure bottom land width L' of driven gear place is 1.0mm～2.0mm, the main gear shaft hole circle heart is 15.0 °～25.0 ° with the two included angle of straight line γ angular ranges that V-type damping slot two-end-point forms respectively, is 15.0 °～25.0 ° with two included angle of straight line γ ' the angular ranges that V-type damping slot two-end-point forms respectively from the gear shaft hole circle heart.
The pressure jump that damping slot structure 2 has reduced transition zone is set in the transition zone between the height nip, makes gear face stable to the reaction thrust of side plate, realize side plate equilibrant force and reaction thrust balance, side plate is played damping effect, reduce the side plate wearing and tearing.Therefore gear pump has only a teeth groove to be in low pressure to the transition zone of high pressure owing to be two tooth sealing configurations.The variation of transition zone pressure is mainly by determining by flowing to the difference in flow that flows out teeth groove of tip clearance and gear face gap, and pressure jump is crossed senior general and is caused gear face to side plate reaction thrust instability between transition zone and the zone of high pressure, floating side plate both ends of the surface pressure imbalance, and then cause side plate to produce tilting moment, cause the side plate serious wear.
As shown in Figure 9, original floating side plate structure does not comprise V-type damping slot structure, flows into and flow out the main gear radial clearance of the flow leakage flow Q of transition zone
1, Q
2Axial clearance leakage flow Q
3, Q
4, Q
5Two-part are formed, and the flow that enters transition zone is very few, and transition zone pressure raises slowly, and transition zone is excessive to the sudden change of zone of high pressure, and gear face is bigger to the reaction thrust fluctuation of side plate.
The transition zone 4 of high-pressure large-displacement gear pump floating side plate of the present invention between the height nip increases gradual change shape V-type damping slot structure 2, making hyperbaric chamber pass through V-type damping slot structure 2 is connected with transition zone 4, make the transition zone pressure jump weaken, improve the pressure gradient between transition zone and the zone of high pressure.In the present embodiment, as shown in figure 10, the flow of inflow and outflow transition zone is mainly by gear radial clearance leakage flow Q
1, Q
2Axial clearance leakage flow Q
3, Q
4, Q
5Additional flow Q with V-type damping slot structure 2
6Form, improved the pressure of side plate transition zone, effectively reduce transition zone to the pressure jump of zone of high pressure, make gear face stable to the reaction thrust of side plate, gear face is overlapped with the compensation line of action of force the reaction thrust of side plate, alleviate the side plate vibration, avoid side plate to produce tilting moment, thereby reduce side plate wearing and tearing and cavitation erosion, the working life of improving gear pump.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiments, and needn't pass through performing creative labour being applied among other embodiments in the General Principle of this explanation.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not breaking away from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (7)
1. floating side plate that is used for the high-pressure large-displacement gear pump, comprise the side plate body, be located at the anti-compensating groove that pushes away on the face of described side plate body, oil-through hole, driving gear axis hole and driven gear axis hole and the equilibrant force groove of being located at described floating side plate complementary area, it is characterized in that: counter the pushing away of described floating side plate also is provided with ear type high pressure oil groove on the face, described ear type high pressure oil groove comprises symmetrically arranged two groups of curve baths centered by horizontal cross shaft, the center flex point of two groups of curve bath joints arranges with described oil-through hole is concentric, and be communicated with described oil-through hole, oil sucting cavity one side that end, curve bath two ends all is positioned at, expand the zone of high pressure low pressure area one side of side plate to, reduce the bearing force in radial.
2. floating side plate according to claim 1, it is characterized in that: the central angle angle [alpha] scope of described driving gear curve bath correspondence is 210 °～230 °, the central angle angle [alpha] of described driven gear curve bath correspondence ' scope is 210 °～230 °.
3. floating side plate according to claim 1 is characterized in that: described through the straight line of center flex point and the main gear shaft hole circle heart and vertically the angle of the angle β between the longitudinal axis be 27.0 °; Described is 27.0 ° through the center flex point and from the straight line of the gear shaft hole circle heart and the angle of the angle β ' between the vertical longitudinal axis.
4. floating side plate according to claim 1, it is characterized in that: the end, two ends of described ear type high pressure oil groove is respectively equipped with the damping slot structure, and described damping slot structure is arranged in transition zone, and described high pressure oil groove is communicated with described damping slot structure.
5. floating side plate according to claim 1, it is characterized in that: described damping slot structure is V-type damping slot structure.
6. floating side plate according to claim 1, it is characterized in that: the V-type damping slot structure bottom land width L of described driving gear place is 1.0mm～2.5mm, the V-type damping slot structure bottom land width L' of described driven gear place is 1.0mm～2.0mm, the described main gear shaft hole circle heart respectively and the angle angle γ scope between two straight lines that form of described V-type damping slot two-end-point be 15.0 °～25.0 °, from the gear shaft hole circle heart respectively and angle angle γ ' the scope between two straight lines that form of described V-type damping slot two-end-point be 15.0 °～20.0 °.
7. floating side plate according to claim 1, it is characterized in that: described equilibrant force groove is the ear connected in star.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101185301A CN103206375A (en) | 2013-04-08 | 2013-04-08 | Novel floating side plate for high-pressure large-displacement gear pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101185301A CN103206375A (en) | 2013-04-08 | 2013-04-08 | Novel floating side plate for high-pressure large-displacement gear pump |
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| CN103206375A true CN103206375A (en) | 2013-07-17 |
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| CN2013101185301A Pending CN103206375A (en) | 2013-04-08 | 2013-04-08 | Novel floating side plate for high-pressure large-displacement gear pump |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498794A (en) * | 2013-09-03 | 2014-01-08 | 同济大学 | Asymmetric floating side plate for a high-pressure large-displacement gear pump |
| CN103591021A (en) * | 2013-09-30 | 2014-02-19 | 同济大学 | Floating side plate for high-pressure large-displacement gear pump |
| CN107269520A (en) * | 2017-07-17 | 2017-10-20 | 常州大学 | Magnetic compensation floating side plate sub-assembly |
| CN107781291A (en) * | 2016-08-29 | 2018-03-09 | 河南航天液压气动技术有限公司 | A kind of pump of balanced radial force combination floating buss |
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| JP2001336483A (en) * | 2000-05-29 | 2001-12-07 | Shin Meiwa Ind Co Ltd | Gear pump or gear motor |
| CN2549210Y (en) * | 2002-05-20 | 2003-05-07 | 杭州萧山云祥工程机械厂 | Double-axial seal compensating high pressure gear pump |
| CN201053393Y (en) * | 2007-06-05 | 2008-04-30 | 青州市金星工程机械液压件厂 | Gear pump for improving side plate compensation structure |
| CN201335011Y (en) * | 2008-12-18 | 2009-10-28 | 四川长江液压件有限责任公司 | Floating side plate for high-pressure gear pump |
| CN201606246U (en) * | 2009-12-16 | 2010-10-13 | 徐州科源液压有限公司 | Floating lateral plate for high-pressure gear oil pump with annular balance tank |
| CN102141035A (en) * | 2011-04-13 | 2011-08-03 | 徐州科源液压有限公司 | High-pressure gear pump with intermediate-pressure bearing lubrication |
| CN202360387U (en) * | 2011-11-08 | 2012-08-01 | 重庆液动科技有限公司 | Thrust plate structure of internal gear pump |
-
2013
- 2013-04-08 CN CN2013101185301A patent/CN103206375A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001336483A (en) * | 2000-05-29 | 2001-12-07 | Shin Meiwa Ind Co Ltd | Gear pump or gear motor |
| CN2549210Y (en) * | 2002-05-20 | 2003-05-07 | 杭州萧山云祥工程机械厂 | Double-axial seal compensating high pressure gear pump |
| CN201053393Y (en) * | 2007-06-05 | 2008-04-30 | 青州市金星工程机械液压件厂 | Gear pump for improving side plate compensation structure |
| CN201335011Y (en) * | 2008-12-18 | 2009-10-28 | 四川长江液压件有限责任公司 | Floating side plate for high-pressure gear pump |
| CN201606246U (en) * | 2009-12-16 | 2010-10-13 | 徐州科源液压有限公司 | Floating lateral plate for high-pressure gear oil pump with annular balance tank |
| CN102141035A (en) * | 2011-04-13 | 2011-08-03 | 徐州科源液压有限公司 | High-pressure gear pump with intermediate-pressure bearing lubrication |
| CN202360387U (en) * | 2011-11-08 | 2012-08-01 | 重庆液动科技有限公司 | Thrust plate structure of internal gear pump |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498794A (en) * | 2013-09-03 | 2014-01-08 | 同济大学 | Asymmetric floating side plate for a high-pressure large-displacement gear pump |
| CN103591021A (en) * | 2013-09-30 | 2014-02-19 | 同济大学 | Floating side plate for high-pressure large-displacement gear pump |
| CN107781291A (en) * | 2016-08-29 | 2018-03-09 | 河南航天液压气动技术有限公司 | A kind of pump of balanced radial force combination floating buss |
| CN107781291B (en) * | 2016-08-29 | 2019-08-30 | 河南航天液压气动技术有限公司 | A kind of pump of balanced radial force combination floating buss |
| CN107269520A (en) * | 2017-07-17 | 2017-10-20 | 常州大学 | Magnetic compensation floating side plate sub-assembly |
| CN107269520B (en) * | 2017-07-17 | 2019-01-29 | 常州大学 | Magnetic compensation floating side plate sub-assembly |
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Application publication date: 20130717 |