CN103486016A - Valve plate for low-noise anti-cavitation plunger pump - Google Patents
Valve plate for low-noise anti-cavitation plunger pump Download PDFInfo
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- CN103486016A CN103486016A CN201310422532.XA CN201310422532A CN103486016A CN 103486016 A CN103486016 A CN 103486016A CN 201310422532 A CN201310422532 A CN 201310422532A CN 103486016 A CN103486016 A CN 103486016A
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- oil
- side damping
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Abstract
A valve plate for a low-noise anti-cavitation plunger pump comprises a valve plate body, a high-pressure oil discharging groove positioned in a high oil pressure area of the valve plate, and an oil absorbing groove positioned in a low oil pressure area of the valve plate. A high pressure side damping groove communicated with a shell cavity of the plunger pump is formed at a position of the end portion, away from a positioning groove, of the high-pressure oil discharging groove, and comprises a V-shaped divergent groove and a damping hole, the V-shaped divergent groove is arranged obliquely, the opening direction of the damping hole is perpendicular to a plane of the valve plate, the V-shaped divergent groove and the damping hole are intersected and communicated, a low pressure side damping groove is formed at a position of the end portion, close to the positioning groove, of the oil absorbing groove, and the spanning angle of the low pressure side damping groove is smaller than that of the high pressure side damping groove. By arranging the high pressure side damping groove of a combined-type throttling structure, size of the efflux angle of the end portion of the high pressure side damping groove is changed, so that the position of bubble breaking is changed, cavitation of the valve plate and noise of the plunger pump are remarkably reduced, and flow quality is improved.
Description
Technical field
The invention belongs to mechanical field, relate to a kind of low noise acoustic reactance cavitation erosion thrust plate.
Background technique
Thrust plate is one of key components and parts of axial piston pump, and port plate structure whether reasonable in design will have a strong impact on noise and vibration and the delivery quality of plunger pump.The work that reduces for a long time the valve plate of plunger pump cavitation erosion mainly concentrates on following several respects: one, improve thrust plate damping slot Structure Decreasing compression shock, reduce pressure peak; Two, improve oil absorbency, reduce the oil suction resistance, occur air pocket while avoiding oil suction.
But above research is difficult to avoid plunger cavity to break away from the oil suction groove and enters the thrust plate cavitation phenomenon that oil extraction caused during the stage.In the plunger pump working procedure, pre-compression phase in plunger cavity and oil-discharge trough connection, because the moment pressure reduction of plunger cavity and the connection of oil suction groove is larger, in damping slot, there will be flow velocity to break away from the low pressure area of wall pressure rapid drawdown, this low pressure area can be separated out rapidly a large amount of bubbles.After Bubble formation, follow mobile fluid to enter plunger cavity, when plunger cavity disengaging oil suction groove enters oil-discharge trough, due to the fluid effect of backwashing, bubble high pressure oil around is compressed under impacting, and volume dwindles rapidly until crumble and fall and condense into liquid.The occupied space of former bubble forms vacuum thus, and the high-voltage oil liquid of surrounding is filled up this space with high speed flow.Because the process of crumbling and fall occurs in a flash, therefore dwindling the place of condensing at bubble will produce violent local hydraulic shock, and pressure and temperature all sharply raises.The bubble High Temperature High Pressure produced that crumbles and fall very easily produces and corrodes plane valving surface, and cavitation erosion will cause the plane valving surface metal-stripping to form pit, cause the flow pulsation at great vibration and noise and pump discharge place simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of low noise acoustic reactance cavitation erosion port plate for plunger pump, to reduce the plane valving surface cavitation erosion, realize noise abatement, the effect of vibration damping and minimizing flow pulsation.
For achieving the above object, solution of the present invention is:
A kind of low noise acoustic reactance cavitation erosion port plate for plunger pump, comprise the thrust plate body, be positioned at the high pressure oil-discharge trough in this height of thrust plate oil pressure district, locating slot and the oil suction groove that is positioned at thrust plate body low oil pressure district, the high pressure oil-discharge trough has away from the end position place of described locating slot the high pressure side damping slot be connected with the high pressure oil-discharge trough, described high pressure side damping slot comprises V-arrangement flaring groove and damping hole, described V-arrangement flaring groove is obliquely installed, the perforate direction of described damping hole is perpendicular to the thrust plate plane layout, described V-arrangement flaring groove intersects and is communicated with described damping hole, described oil suction groove is provided with near the end position place of described locating slot the low voltage side damping slot be connected with described oil suction groove, described low voltage side damping slot is across angle
be less than described high pressure side damping slot structure across angle
Described damping hole is hierarchic structure, comprise the first through hole, the second through hole and the third through-hole that arrange with one heart from top to bottom, the perforate direction of the first through hole, the second through hole and third through-hole is all perpendicular to the thrust plate plane layout, the hole heart of described the first through hole is positioned on the center line of described V-arrangement flaring groove, described the second through hole is positioned at the bottom surface of the first through hole, and described third through-hole is positioned at the bottom surface of described the second through hole.
The diameter d of described the first through hole
1diameter d with third through-hole
3equate the diameter d of described the first through hole
1be greater than the diameter d of the second through hole
2.
Described the first through-hole diameter d
1span be 1.0mm-1.5mm, the hole depth h of described the first through hole
1for 1.5mm, the second through-hole diameter d
2span be 0.5mm-1.0mm, hole depth h
2for 1.0mm, the third through-hole diameter d
3span be 1.0mm-1.5mm, third through-hole hole depth h
3for 2.0mm.
Described high pressure side damping slot across angle
be 22.0 °, described damping hole with respect to high pressure side damping slot starting point deflection angle is
Described low voltage side damping slot is the flaring groove that cross section is V-arrangement, the low voltage side damping slot across angle
it is 20 °.
The angle of inclination of described V-arrangement flaring groove
it is 5.0 °.
The relative thrust plate symmetry center of described locating slot deflection angle
span be 7.5 °-8.0 °.
Described high pressure oil-discharge trough comprises a plurality of kidney-shaped oil-discharge troughs.
Described oil suction groove is arc oil suction groove.
Owing to adopting such scheme, the invention has the beneficial effects as follows:
Thrust plate of the present invention comprises the thrust plate body, be located at the high pressure oil-discharge trough on the thrust plate body, locating slot and low pressure oil suction groove, also be provided with the high pressure side damping slot at the high pressure oil-discharge trough away from the end position place of locating slot, this high pressure side damping slot is the combined type throttle structure that gradual V-arrangement damping slot combines with damping hole, end position place at the close locating slot of oil suction groove is provided with the low voltage side damping slot, the low voltage side damping slot is gradual V-arrangement damping structure, high pressure side damping slot plunger cavity breaks away from after the oil suction groove enters pre-compression phase to be connected with the high pressure side damping slot, high-voltage oil liquid pours in down a chimney into plunger cavity by the high pressure side damping slot.The combined type damping slot structure fluid efflux angle that makes to backwash increases, and bubble in plunger cavity is rushed to plunger cavity central authorities, avoids bubble to crumble and fall at plane valving surface, reduces the bubble High Temperature High Pressure that the produces corrosion function to plane valving surface of crumbling and fall.
The accompanying drawing explanation
Fig. 1 is port plate structure schematic diagram in one embodiment of the invention;
The A-A that Fig. 2 is mesohigh side damping slot embodiment illustrated in fig. 1 analyses and observe partial enlarged drawing;
The B-B that Fig. 3 is high pressure side damping slot shown in Fig. 2 analyses and observe partial enlarged drawing;
The working state schematic representation that Fig. 4 is thrust plate embodiment illustrated in fig. 1.
Embodiment
Below in conjunction with the accompanying drawing illustrated embodiment, the present invention is further illustrated.
As shown in Figure 1, the invention discloses a kind of low noise acoustic reactance cavitation erosion port plate for plunger pump, comprise thrust plate body 1, have locating slot 4, arc oil suction groove 6 and high pressure oil groove on thrust plate body 1.Wherein, the relative thrust plate symmetry center deflection angle of locating slot 4 is
in order to can, with respect to symmetry center deflection several angle, realize precompression and the pre-release of plunger cavity during the thrust plate assembling; The high pressure oil groove comprises a plurality of kidney-shaped oil-discharge troughs 2, a plurality of kidney-shaped oil-discharge troughs 2 are positioned at place, the high oil pressure of thrust plate body 1 district, and the high pressure oil groove also has the high pressure side damping slot away from locating slot 4 end position places, the high pressure side damping slot is communicated with setting with the high pressure oil groove, the high pressure side damping slot comprises V-arrangement flaring groove 7 and intersects and be communicated with V-arrangement flaring groove 7 damping hole 8 arranged, the high pressure side damping slot across angle
v-arrangement flaring groove 7 is obliquely installed, and the size at V-arrangement flaring groove 7 angles of inclination is that the logical pasta by calculating V-arrangement flaring groove is long-pending definite, and in the present embodiment, the bottom land limit of V-arrangement flaring groove 7 and plane valving surface angle are 5 °; The perforate direction of damping hole 8 is perpendicular to the thrust plate plane layout, and damping hole structure 8 with respect to high pressure side damping slot structure starting point deflection angle is
arc oil suction groove 6 is positioned at the place, low oil pressure district of thrust plate body 1, and oil suction groove 6 is provided with low voltage side damping slot 5 near the end position place of locating slot 4, and low voltage side damping slot 5 is V-arrangement flaring structure, and low voltage side damping slot 5 is communicated with oil suction groove 6, for reducing flow pulsation, low voltage side damping slot 5 is across angle
be less than the high pressure side damping slot across angle
in the present embodiment, low voltage side damping slot 5 is across angle
it is 20 °.
As shown in Figures 2 and 3, above-mentioned damping hole 8 is hierarchic structure, comprise the first through hole 13, the second through hole 14 and the third through-hole 15 that arrange with one heart from top to bottom, on the center line that is centered close to V-arrangement flaring groove 7 of the first through hole 13, the second through hole 14 is positioned at the bottom surface of the first through hole 13, and third through-hole 15 is positioned at the bottom surface of the second through hole 14.In the present embodiment, the diameter d of the first through hole 13
1be greater than the diameter d of the second through hole 14
2, so that control the area of passage of damping hole 8, the diameter d of the first through hole 13
1diameter d with third through-hole 15
3equate so that in damping hole 8 course of working without changing drill bit more, only need a drill bit just can complete the making of damping hole 8.
The first through hole 13 diameter d
1with third through-hole 15 diameter d
3the selection of concrete size by calculating the damping hole area of passage, determine.In the present embodiment, the first through hole 13 diameter d
1span be 1.0-1.5mm, the first through hole 13 hole depth h
1for 1.5mm, the second through hole 14 diameter d
2span be 0.5-1.0mm, the hole depth h of the second through hole 14
2for 1.0mm, third through-hole 15 diameter d
3span be 1.0-1.5mm, third through-hole 15 hole depth h
3for 2.0mm.
As shown in Figure 4, when plunger pump is worked, plunger cylinder 10 is around the center line rotation of thrust plate body 1, and sense of rotation is counterclockwise.Plunger cavity kidney-shaped window 12 passes through low voltage side damping slot 5 successively, high pressure oil in plunger cavity is realized pre-release, then complete oil suction through oil suction groove 6, plunger cavity kidney-shaped window 12 breaks away from oil suction grooves 6 afterwards and damping slot connection in high pressure side enters precompression section (pre-loading district), connected oil extraction with kidney-shaped oil-discharge trough 2 again, then through low voltage side damping slot 5, so circulate.In this process, because being filled oil, plunger cavity enters the pre-loading district, in chamber, oil content is oil drain quantity and dead volume sum, enter and unload in advance nip after the plunger cavity oil extraction, in chamber, oil content is only dead volume, Gu Yushengyaqu with unload the nip damping slot in advance and be arranged to different amount across angle, be i.e. the high pressure side damping slot across angle
with low voltage side damping slot 5 across angle
difference, low voltage side damping slot 5 is across angle
be less than the high pressure side damping slot across angle
Simultaneously, in plunger cavity kidney-shaped window 12 breaks away from oil suction groove 6 and enters the process of precompression section with the connection of high pressure side damping slot, due to active chamber by low pressure to the high pressure transition, there will be pressure to backwash and flow pours in down a chimney, the bubble in plunger cavity backwashes and flow pours in down a chimney under effect and crumbles and fall at pressure.If the high pressure side damping slot only includes single V-arrangement flaring groove 7, the hydraulic oil efflux angle backwashed so will be very little, pour in down a chimney flow bubble in plunger cavity is rushed to plane valving surface, and bubble is crumbled and fall plane valving surface is caused to cavitation erosion.But, after adopting the composite structure be comprised of V-arrangement flaring groove 7 and damping hole 8, the hydraulic oil that flow is poured in down a chimney is for passing through the flow Q of V-arrangement flaring groove 7
1with the flow Q by the first through hole 13 and the second through hole 14
2interflow amount Q
3, the perforate direction of the first through hole 13 and the second through hole 14 is perpendicular to the plane valving surface setting, therefore Q
2the flow velocity direction is perpendicular to the thrust plate plane, the efflux angle that pressure backwashes increases accordingly, pour in down a chimney flow bubble in plunger cavity is rushed to plunger cavity central authorities, avoid bubble to crumble and fall at plane valving surface, reduce the bubble High Temperature High Pressure that the produces corrosion function to plane valving surface of crumbling and fall.
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 General Principle described herein is applied in other embodiments and needn't passes through performing creative labour.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 (10)
1. low noise acoustic reactance cavitation erosion port plate for plunger pump, comprise thrust plate body (1), be positioned at the high pressure oil-discharge trough in the high oil pressure of thrust plate body (1) district, locating slot (4) and the oil suction groove (6) that is positioned at thrust plate body (1) low oil pressure district, it is characterized in that: the high pressure oil-discharge trough has away from the end position place of described locating slot (4) the high pressure side damping slot be connected with the high pressure oil-discharge trough, described high pressure side damping slot comprises V-arrangement flaring groove (7) and damping hole (8), described V-arrangement flaring groove (7) is obliquely installed, the perforate direction of described damping hole (8) is perpendicular to the thrust plate plane layout, described V-arrangement flaring groove (7) intersects and is communicated with described damping hole (8), described oil suction groove (6) is provided with near the end position place of described locating slot (4) the low voltage side damping slot (5) be connected with described oil suction groove (6), described low voltage side damping slot (5) is across angle
be less than described high pressure side damping slot structure across angle
2. low noise acoustic reactance according to claim 1 cavitation erosion port plate for plunger pump, it is characterized in that: described damping hole (8) is hierarchic structure, comprise the first through hole (13) arranged with one heart from top to bottom, the second through hole (14) and third through-hole (15), the first through hole (13), the perforate direction of the second through hole (14) and third through-hole (15) is all perpendicular to the thrust plate plane layout, the hole heart of described the first through hole (13) is positioned on the center line of described V-arrangement flaring groove (7), described the second through hole (14) is positioned at the bottom surface of the first through hole (13), described third through-hole (15) is positioned at the bottom surface of described the second through hole (14).
3. low noise acoustic reactance cavitation erosion port plate for plunger pump according to claim 2, is characterized in that: the diameter d of described the first through hole (13)
1diameter d with third through-hole (15)
3equate the diameter d of described the first through hole (13)
1be greater than the diameter d of the second through hole (14)
2.
4. according to the described low noise acoustic reactance cavitation erosion of claim 2 or 3 port plate for plunger pump, it is characterized in that: described the first through hole (13) diameter d
1span be 1.0mm-1.5mm, the hole depth h of described the first through hole (13)
1for 1.5mm, the second through hole (14) diameter d
2span be 0.5mm-1.0mm, hole depth h
2for 1.0mm, third through-hole (15) diameter d
3span be 1.0mm-1.5mm, third through-hole (15) hole depth h
3for 2.0mm.
5. low noise acoustic reactance according to claim 1 cavitation erosion port plate for plunger pump is characterized in that: described high pressure side damping slot across angle
be 22.0 °, described damping hole (8) with respect to high pressure side damping slot starting point deflection angle is
6. low noise acoustic reactance according to claim 1 cavitation erosion port plate for plunger pump, it is characterized in that: described low voltage side damping slot (5) is the flaring groove that cross section is V-arrangement, low voltage side damping slot (5) across angle
it is 20 °.
7. low noise acoustic reactance cavitation erosion port plate for plunger pump according to claim 1, is characterized in that: the angle of inclination of described V-arrangement flaring groove (7)
it is 5.0 °.
8. low noise acoustic reactance cavitation erosion port plate for plunger pump according to claim 1, is characterized in that: the relative thrust plate symmetry center deflection angle of described locating slot (4)
span be 7.5 °-8.0 °.
9. low noise acoustic reactance according to claim 1 cavitation erosion port plate for plunger pump, it is characterized in that: described high pressure oil-discharge trough comprises a plurality of kidney-shaped oil-discharge troughs (2).
10. low noise acoustic reactance according to claim 1 cavitation erosion port plate for plunger pump, it is characterized in that: described oil suction groove (6) is arc oil suction groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310422532.XA CN103486016A (en) | 2013-09-16 | 2013-09-16 | Valve plate for low-noise anti-cavitation plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310422532.XA CN103486016A (en) | 2013-09-16 | 2013-09-16 | Valve plate for low-noise anti-cavitation plunger pump |
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| Publication Number | Publication Date |
|---|---|
| CN103486016A true CN103486016A (en) | 2014-01-01 |
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ID=49826518
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310422532.XA Pending CN103486016A (en) | 2013-09-16 | 2013-09-16 | Valve plate for low-noise anti-cavitation plunger pump |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939330A (en) * | 2014-04-29 | 2014-07-23 | 同济大学 | Damping noise reduction valve plate for plunger hydraulic pump |
| CN104791236A (en) * | 2014-12-23 | 2015-07-22 | 浙江工业大学 | Plunger pump thrust plate |
| CN105422433A (en) * | 2015-12-23 | 2016-03-23 | 无锡威孚精密机械制造有限责任公司 | Four-groove valve plate of hydrostatic transmission device |
| CN111456923A (en) * | 2020-05-09 | 2020-07-28 | 烟台大学 | Axial plunger pump valve plate optimization design method |
| US11236736B2 (en) | 2019-09-27 | 2022-02-01 | Honeywell International Inc. | Axial piston pump with port plate having balance feed aperture relief feature |
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| US4920856A (en) * | 1987-07-30 | 1990-05-01 | Brueninghaus Hydraulik Gmbh | Axial piston machine of the swashplate or bent axis type having slot control and pressure balancing passages |
| US4934253A (en) * | 1987-12-18 | 1990-06-19 | Brueninghaus Hydraulik Gmbh | Axial piston pump |
| US5230274A (en) * | 1992-02-11 | 1993-07-27 | Vickers Incorporated | Variable displacement hydraulic pump with quiet timing |
| JP2003065215A (en) * | 2001-08-22 | 2003-03-05 | Toshiba Mach Co Ltd | Piston pump motor |
| CN1544813A (en) * | 2003-11-12 | 2004-11-10 | 浙江大学 | Bubble evolution proof plunger pump port plate |
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2013
- 2013-09-16 CN CN201310422532.XA patent/CN103486016A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3699845A (en) * | 1970-07-24 | 1972-10-24 | Lucas Industries Ltd | Rotary hydraulic pumps and motors |
| US4920856A (en) * | 1987-07-30 | 1990-05-01 | Brueninghaus Hydraulik Gmbh | Axial piston machine of the swashplate or bent axis type having slot control and pressure balancing passages |
| US4934253A (en) * | 1987-12-18 | 1990-06-19 | Brueninghaus Hydraulik Gmbh | Axial piston pump |
| US5230274A (en) * | 1992-02-11 | 1993-07-27 | Vickers Incorporated | Variable displacement hydraulic pump with quiet timing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939330A (en) * | 2014-04-29 | 2014-07-23 | 同济大学 | Damping noise reduction valve plate for plunger hydraulic pump |
| CN104791236A (en) * | 2014-12-23 | 2015-07-22 | 浙江工业大学 | Plunger pump thrust plate |
| CN104791236B (en) * | 2014-12-23 | 2017-03-01 | 浙江工业大学 | A kind of valve plate of plunger pump |
| CN105422433A (en) * | 2015-12-23 | 2016-03-23 | 无锡威孚精密机械制造有限责任公司 | Four-groove valve plate of hydrostatic transmission device |
| US11236736B2 (en) | 2019-09-27 | 2022-02-01 | Honeywell International Inc. | Axial piston pump with port plate having balance feed aperture relief feature |
| CN111456923A (en) * | 2020-05-09 | 2020-07-28 | 烟台大学 | Axial plunger pump valve plate optimization design method |
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Application publication date: 20140101 |