CN104533780A - Hydraulic pump plunger and sliding shoe assembly and machining method thereof - Google Patents
Hydraulic pump plunger and sliding shoe assembly and machining method thereof Download PDFInfo
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- CN104533780A CN104533780A CN201410850155.4A CN201410850155A CN104533780A CN 104533780 A CN104533780 A CN 104533780A CN 201410850155 A CN201410850155 A CN 201410850155A CN 104533780 A CN104533780 A CN 104533780A
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- 238000000034 method Methods 0.000 title claims description 23
- 238000003754 machining Methods 0.000 title description 9
- 230000007704 transition Effects 0.000 claims abstract description 86
- 238000013016 damping Methods 0.000 claims abstract description 38
- 239000000758 substrate Substances 0.000 claims description 27
- 230000008569 process Effects 0.000 claims description 21
- 238000005070 sampling Methods 0.000 claims description 18
- 238000000227 grinding Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 230000007797 corrosion Effects 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims description 11
- 238000013461 design Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000005538 encapsulation Methods 0.000 claims description 9
- 238000005498 polishing Methods 0.000 claims description 9
- 238000011161 development Methods 0.000 claims description 7
- 238000003672 processing method Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000005121 nitriding Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010030 laminating Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
A hydraulic pump plunger and sliding shoe assembly comprises a plunger and a sliding shoe, the plunger and the sliding shoe are in riveting connection, and a close-up fixed structure is arranged in an inner cavity of the sliding shoe so that it can be guaranteed that the plunger and the sliding shoe relatively move and are free of blocking. A plunger outer circle is arranged on the plunger, and an outer circle bottom transition arc is arranged at the lower end of the plunger outer circle. A spherical head neck and a plunger spherical head are arranged above the plunger outer circle, an inner cavity of the plunger is provided with a plunger inner conical face, the upper portion of the plunger inner conical face is communicated with a plunger oil channel through transition of an inside transition conical face, an oil path conical channel is arranged at the top end of the plunger spherical head, and the plunger oil channel is communicated with the oil path conical channel through a plunger damping hole. A sliding shoe inner spherical surface is arranged on the inner side of the close-up fixed structure, a sliding shoe oil channel in the middle of the sliding shoe inner spherical surface is communicated with a sliding shoe conical oil channel through a sliding shoe damping hole, eccentric pressure-bearing cavities of three levels are formed in the periphery of the sliding shoe damping hole, meanwhile, a damping oil channel is arranged on the pressure-bearing cavity of each level, the lower portion of the plunger inner conical face is arranged to be in small conicity, and the oil path conical channel is communicated with the sliding shoe oil channel.
Description
Technical field
The present invention relates to Variable plunger pump technical field, particularly relate to a kind of hydraulic pump plunger slippery boots assembly and processing method thereof.
Background technique
Along with the develop rapidly of modernization machinery, the particularly development in the field such as engineering machinery, injection machine, lathe and farm machinery, the demand of pluger type hydraulic pump is increased gradually, how to improve working life and the reliability of pluger type hydraulic pump, become those skilled in the art's technical problem urgently to be resolved hurrily with the requirement meeting actual conditions.But the technical problem faced at present is: plunger coordinates without auxiliary location structure in installation process with piston shoes, be difficult to ensure plunger and piston shoes rivet after can relative motion fluent; Plunger easily pulls cylinder sleeve when plunger cylinder moves back and forth simultaneously, and then causes running not smooth, and during high speed operation, producing has centrifugal force, easily causes cylinder sleeve compressive deformation under effect of inertia; In addition, between piston shoes with plunger, be communicated with off-load by means of only oil duct, cause the hydraulic coupling at its two ends uneven, and then affect the normal conveying of pressure oil, and swash plate produces malleation by during piston shoes promotion plunger force feed, is unfavorable for that piston shoes change running state on swash plate, causes the wearing and tearing of piston shoes.
Summary of the invention
Technical problem solved by the invention is to provide a kind of hydraulic pump plunger slippery boots assembly and processing method thereof, to solve the shortcoming in above-mentioned background technology.
Technical problem solved by the invention realizes by the following technical solutions:
Hydraulic pump plunger slippery boots assembly, comprise plunger and piston shoes, wherein, plunger and piston shoes are riveted, and on piston shoes, be provided with the closing in fixed structure of locating for plunger and piston shoes, plunger is provided with the plunger cylindrical for being installed in plunger cylinder, and plunger cylindrical lower end and end face transition position are provided with cylindrical bottom transition circular arc, pulling cylinder sleeve when moving back and forth for preventing plunger, keeping operation unimpeded simultaneously; Bulb neck and plunger ball is provided with above plunger cylindrical, plunger cavity is provided with plunger inner conical surface, plunger inner conical surface top is communicated with plunger oil duct by inner transition conical surface transition, plunger ball top is provided with oil circuit tapered channel, plunger oil duct is communicated with oil circuit tapered channel by plunger damping hole, and pressure oil transits in the related channel program structure of piston shoes through plunger oil duct, plunger damping hole and oil circuit tapered channel; Closing in fixed structure is arranged on piston shoes inner chamber, and piston shoes inner ball surface is provided with inside closing in fixed structure, and be provided with piston shoes oil duct in the middle of piston shoes inner ball surface, piston shoes oil duct is communicated with piston shoes taper oil duct by piston shoes damping hole, and piston shoes damping hole periphery is provided with one-level pressure-bearing die cavity, secondary pressure-bearing die cavity and three grades of pressure-bearing die cavities, on one-level pressure-bearing die cavity, be provided with one-level damping oil duct simultaneously, secondary pressure-bearing die cavity is provided with secondary damping oil duct, three grades of pressure-bearing die cavities are provided with three-stage damping oil duct; In addition, plunger inner conical surface lower body portions is that Small Taper is arranged, oil circuit tapered channel is communicated with piston shoes oil duct, and one-level pressure-bearing die cavity, secondary pressure-bearing die cavity and three grades of pressure-bearing die cavities are set for the eccentric, when swash plate promotes plunger force feed by piston shoes, cause bias voltage, contribute to piston shoes and change running state on swash plate, reduce the wearing and tearing of piston shoes, eccentricity range 0.5mm ~ 0.6mm.
In the present invention, after plunger and piston shoes are riveted and closed up, plunger and piston shoes keep relative motion fluent, and hinged angle of revolution be-21 ° ~+21 °, and gap 0.015mm ~ 0.05mm to axial, rivet stretching resistance and be not less than 4500N.
In the present invention, plunger ball and bulb neck transition position are provided with plunger first annular end face, plunger First Transition circular arc is provided with between plunger first annular end face and plunger ball, by plunger First Transition arc smooth transition, be convenient to the processing of plunger ball when grinding and the mutual smoothness operation after ensureing assembling; Plunger second transition arc is provided with, by the transition of plunger second transition arc, to increase bearing capacity and to reduce stress between plunger first annular end face and bulb neck; And plunger cylindrical upper end and bulb neck transition position are provided with plunger second annular end face, between plunger second annular end face and plunger cylindrical, be provided with plunger the 3rd transition arc, by plunger the 3rd transition arc transition.
In the present invention, plunger inner conical surface lower body portions is that Small Taper is arranged; thin-walled effectively can reduce the inertia of plunger; when plunger cylinder high speed operation; greatly reduce centrifugal force; effectively reduce the compressive deformation of cylinder sleeve, thus keeps good Theoretical Design characteristic, and the inner transition conical surface ensure that integral transition and the pressure-bearing mechanical characteristic of plunger preferably.
In the present invention, closing in fixed structure comprises piston shoes transition conical surface, closing in transition inner ring road, close up interior scarce circle, closing in transition arc and piston shoes conical surface, wherein, piston shoes conical surface is arranged on the end face that piston shoes and plunger rivet, lack circle one end in closing up to be connected with piston shoes conical surface by closing in transition arc, the other end is connected with closing in transition inner ring road, and piston shoes transition conical surface is arranged on inside closing in transition inner ring road; The distortion that closing in transition inner ring road and piston shoes transition conical surface can effectively be avoided producing when right-hand member closes up impacts piston shoes inner ball surface, lack circle in closing up and be conducive to distortion of closing up, and the impact that can reduce piston shoes inner ball surface, and the transition arc that closes up can make plunger after closing in, piston shoes are smooth and easy activity in plunger, without clamping stagnation.
In the present invention, piston shoes outer installment has piston shoes annular end face and piston shoes transition cylindrical, and piston shoes annular end face and piston shoes transition cylindrical junction are provided with piston shoes anti-interference deep gouge, when loading complete machine for preventing piston shoes and platen produce and interfere.
In the present invention, when plunger pump oil runs, pressure oil is transitioned into piston shoes oil duct, piston shoes damping hole and piston shoes taper oil duct through plunger oil duct, plunger damping hole and oil circuit tapered channel and pours one-level pressure-bearing die cavity, and flow to secondary pressure-bearing die cavity through one-level damping oil duct, three grades of pressure-bearing die cavities are flowed into again through secondary damping oil duct, final through the off-load of three-stage damping oil duct, it is damping off-load in whole process, hydraulic coupling relative equilibrium is kept to make assembly two ends, wherein plunger damping hole effectively can reduce the impact of pressure oil, ensures the laminating of piston shoes and swash plate.
In the present invention, plunger assembly need possess the characteristics such as wear-resisting, corrosion-resistant and shock-resistant, and according to actual needs, part-structure needs higher machining accuracy, the dimensional accuracy of plunger ball is-0.005mm ~-0.013mm, the dimensional accuracy of plunger cylindrical is-0.012mm ~-0.02mm, and the dimensional accuracy in closing in transition inner ring road is+0.005mm ~+0.015mm, and all the other body structure surfaces are the requirement of machining requirements IT6 class precision.
Hydraulic pump plunger slippery boots assembly processing method, concrete steps are as follows:
1, the preparation of plunger
1) choose body material, modified polishing bar selected by body material, adopts double dynamical main shaft automatic lathe to process, and stays following process surplus simultaneously, obtain plunger base substrate at processing plunger ball and the outer bowlder of plunger; And Production development sampling observation detector is installed in double dynamical main shaft automatic lathe, detect critical size, to ensure the machining accuracy produced in batches, effectively control scrappage;
2) to step 1) in obtain plunger base substrate carry out surface gas nitriding treatment, grinding front surface hardness is not less than 850HV0.2, depth of penetration 0.35 ~ 0.5mm;
3) until step 2) in after the gas nitriding of plunger billet surface is disposed, its two ends are located, adopt form grinding machine corase grind to cut plunger ball and plunger cylindrical;
4) treat step 3) in after plunger base substrate corase grind cuts, then grind plunger ball to design size requirement;
5) again to location, plunger base substrate two ends, and high-precision peripheral milling is adopted to refine plunger cylindrical;
6) step 5 is treated) after center pillar plug fine grinding cylinder, softer polishing plunger ball and plunger cylindrical, and each transition arc of round and smooth polishing, obtain plunger finished product;
7) to step 6) in the plunger finished product that obtains carry out sampling Detection, sampling observation rate is not less than 5%, and sample detection be entirely examine;
8) to step 7) in detect qualified plunger finished product carry out cleaning corrosion protection degaussing process;
9) to step 8) in carry out cleaning plunger finished appearance that corrosion protection degaussing is disposed detect qualified after, encapsulation warehouse-in is stand-by;
2, the preparation of piston shoes
1) choose body material, free-cutting brass bar selected by body material, adopts double dynamical main shaft automatic lathe to process, and staying following process surplus simultaneously, obtaining piston shoes base substrate when processing piston shoes inner ball surface; And Production development sampling observation detector is installed in double dynamical main shaft automatic lathe, detect critical size, to ensure the machining accuracy produced in batches, effectively control scrappage;
2) until step 1) in after piston shoes base substrate completion of processing, piston shoes base substrate grinds piston shoes inner ball surface to design size requirement;
3) treat step 2) in after piston shoes inner ball surface grinding on piston shoes base substrate, cleaning corrosion protection process is carried out to piston shoes base substrate, obtains piston shoes product;
4) to step 3) in the piston shoes finished product that obtains carry out sampling Detection, sampling observation rate is not less than 5%, and sample detection be entirely examine;
5) to step 4) in detect qualified piston shoes finished appearance detect qualified after, encapsulation warehouse-in is stand-by;
3, plunger and piston shoes are assembled
The stand-by piston shoes of encapsulation warehouse-in are set on plunger, and carry out shrinkage treatment, and axial clearance 0.015mm ~ 0.07mm.
Beneficial effect: in the present invention, piston shoes are arranged by the closing in fixed structure of locating for plunger and piston shoes, in order to ensure plunger and piston shoes rivet after can relative motion fluent, and the plunger cylindrical lower end that plunger is arranged and end face transition position are provided with cylindrical bottom transition circular arc, pulling cylinder sleeve when moving back and forth for preventing plunger, keeping operation unimpeded simultaneously; Plunger inner conical surface lower body portions is that Small Taper is arranged, and thin-walled effectively can reduce the inertia of plunger, when plunger cylinder high speed operation, greatly reduces centrifugal force, effectively reduces the compressive deformation of cylinder sleeve; Piston shoes and plunger are connected by damping, hydraulic coupling relative equilibrium is kept to make assembly two ends, and one-level pressure-bearing die cavity, secondary pressure-bearing die cavity and three grades of pressure-bearing die cavities are set for the eccentric, when swash plate promotes plunger force feed by piston shoes, cause bias voltage, contribute to piston shoes and change running state on swash plate, and then reduce the wearing and tearing of piston shoes.
Accompanying drawing explanation
Fig. 1 is the plan view of preferred embodiment of the present invention.
Fig. 2 is the plunger sectional view in preferred embodiment of the present invention.
Fig. 3 is plunger ball in preferred embodiment of the present invention and bulb neck partial sectional view.
Fig. 4 is the piston shoes sectional view in preferred embodiment of the present invention.
Fig. 5 is the piston shoes left view in preferred embodiment of the present invention.
Fig. 6 is piston shoes annular end face in preferred embodiment of the present invention and closing in transition inner ring road partial sectional view.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
See the hydraulic pump plunger slippery boots assembly of Fig. 1 ~ Fig. 6, comprise plunger 1, oil circuit tapered channel 1-1, plunger ball 1-2, bulb neck 1-3, inner transition conical surface 1-4, plunger inner conical surface 1-5, cylindrical bottom transition circular arc 1-6, plunger cylindrical 1-7, neck transition arc 1-8, plunger oil duct 1-9, plunger damping hole 1-10, plunger First Transition circular arc 1-11, plunger first annular end face 1-12, plunger second transition arc 1-13, plunger second annular end face 1-14, plunger the 3rd transition arc 1-15, piston shoes 2, piston shoes annular end face 2-1, piston shoes transition cylindrical 2-2, circle 2-3 is lacked in closing up, piston shoes conical surface 2-4, piston shoes oil duct 2-5, piston shoes inner ball surface 2-6, closing in transition inner ring road 2-7, piston shoes anti-interference deep gouge 2-8, one-level pressure-bearing die cavity 2-9, piston shoes damping hole 2-10, piston shoes taper oil duct 2-11, secondary pressure-bearing die cavity 2-12, three grades of pressure-bearing die cavity 2-13, one-level damping oil duct 2-14, secondary damping oil duct 2-15, three-stage damping oil duct 2-16, closing in transition arc 2-17, piston shoes transition conical surface 2-18.
In the present embodiment, plunger 1 and piston shoes 2 after riveting as shown in Figure 1, the plunger ball 1-2 that plunger 1 is arranged coordinates with piston shoes inner ball surface 2-6, and by the relative position limiting plunger 1 and piston shoes 2 that closes up, after requiring that riveted joint is closed up, plunger 1 and piston shoes 2 keep relative motion fluent, and hinged angle of revolution is-21 ° ~+21 °, and gap 0.015mm ~ 0.05mm to axial, riveted joint stretching resistance is not less than 4500N, plunger 1 is installed in plunger cylinder by plunger cylindrical 1-7, and lower end and end face transition position are designed with cylindrical bottom transition circular arc 1-6, pull cylinder sleeve when preventing plunger 1 from moving back and forth and bring to operation not smooth, bulb neck 1-3 and plunger second annular end face 1-14 is by neck transition arc 1-8 transition, to increase bearing capacity and to reduce stress, plunger first annular end face 1-12 and bulb neck 1-3 is by plunger second transition arc 1-13 transition, and plunger first annular end face 1-12 and plunger ball 1-2 is by plunger First Transition circular arc 1-11 rounding off, the processing of plunger ball 1-2 when grinding is convenient in this design and the mutual smoothness after ensureing assembling is run, plunger second annular end face 1-14 and plunger cylindrical 1-7 is by plunger the 3rd transition arc 1-15 transition, the inner chamber lower body portions of plunger 1 adopts Small Taper design, thin-walled effectively can reduce the inertia of plunger 1, when plunger cylinder high speed operation, greatly reduce centrifugal force, effectively reduce the compressive deformation of cylinder sleeve, thus keep good Theoretical Design characteristic, inner transition conical surface 1-4 ensure that integral transition and the pressure-bearing mechanical characteristic of plunger 1 preferably,
When plunger 1 pump oil runs, pressure oil is transitioned in the related channel program structure of piston shoes 2 through inner chamber and plunger oil duct 1-9, plunger damping hole 1-10 and oil circuit tapered channel 1-1, wherein plunger damping hole 1-10 effectively can reduce the impact of pressure oil, ensures the laminating of piston shoes 2 and swash plate, piston shoes annular end face 2-1 and piston shoes transition cylindrical 2-2 bound fraction are designed with piston shoes anti-interference deep gouge 2-8, when preventing from loading complete machine and platen produce and interfere, piston shoes transition conical surface 2-18 designed by inner chamber, closing in transition inner ring road 2-7, circle 2-3 is lacked in closing up, closing in transition arc 2-17 and piston shoes conical surface 2-4 is closing in fixed structure, the distortion that closing in transition inner ring road 2-7 and piston shoes transition conical surface 2-18 can effectively avoid producing when right-hand member closes up impacts piston shoes inner ball surface 2-6, lack circle 2-3 in closing up and be conducive to distortion of closing up, and the impact that can reduce piston shoes inner ball surface 2-6 part, designed closing in transition arc 2-17 can make plunger 1 piston shoes 2 smooth and easy activity in plunger 1 after closing in, without clamping stagnation, when assembly loads complete machine work, pressure oil is through plunger oil duct 1-9, plunger damping hole 1-10, oil circuit tapered channel 1-1, piston shoes oil duct 2-5, piston shoes damping hole 2-10 and piston shoes taper oil duct 2-11 pours one-level pressure-bearing die cavity 2-9, and flow to secondary pressure-bearing die cavity 2-12 through one-level damping oil duct 2-14, three grades of pressure-bearing die cavity 2-13 are flowed into again through secondary damping oil duct 2-15, final through three-stage damping oil duct 2-16 off-load, it is damping off-load in whole process, hydraulic coupling relative equilibrium is kept to make assembly two ends, and one-level pressure-bearing die cavity 2-9, secondary pressure-bearing die cavity 2-12 and three grade of pressure-bearing die cavity 2-13 is eccentric design, when swash plate promotes plunger force feed by piston shoes, cause bias voltage, contribute to piston shoes and change running state on swash plate, reduce the wearing and tearing of piston shoes, scope 0.5mm ~ the 0.6mm of throw of eccentric d.
In the present embodiment, plunger assembly need possess the characteristics such as wear-resisting, corrosion-resistant and shock-resistant, and according to actual needs, part-structure needs higher machining accuracy, the dimensional accuracy of plunger ball 1-2 is-0.005mm ~-0.013mm, the dimensional accuracy of plunger cylindrical 1-7 is-0.012mm ~-0.02mm, and the dimensional accuracy of closing in transition inner ring road 2-7 is+0.005mm ~+0.015mm, and all the other body structure surfaces are the requirement of machining requirements IT6 class precision.
In the present embodiment, hydraulic pump plunger slippery boots assembly processing method, concrete steps are as follows:
1, the preparation of plunger 1
1) choose body material, modified polishing bar selected by body material, adopts double dynamical main shaft automatic lathe to process, and staying following process surplus simultaneously, obtaining plunger base substrate when processing plunger ball 1-2 and plunger cylindrical 1-7; And Production development sampling observation detector is installed in double dynamical main shaft automatic lathe, detect critical size, to ensure the machining accuracy produced in batches, effectively control scrappage;
2) to step 1) in obtain plunger base substrate carry out surface gas nitriding treatment, grinding front surface hardness is not less than 850HV0.2, depth of penetration 0.35 ~ 0.5mm;
3) until step 2) in after the gas nitriding of plunger billet surface is disposed, its two ends are located, adopt form grinding machine corase grind to cut plunger ball 1-2 and plunger cylindrical 1-7;
4) treat step 3) in after plunger base substrate corase grind cuts, then grind plunger ball 1-2 to design size requirement;
5) again to location, plunger base substrate two ends, and high-precision peripheral milling is adopted to refine plunger cylindrical 1-7;
6) step 5 is treated) center pillar is beyond the Great Wall after round 1-7 fine grinding, softer polishing plunger ball 1-2 and plunger cylindrical 1-7, and each transition arc of round and smooth polishing, obtain plunger finished product;
7) to step 6) in the plunger finished product that obtains carry out sampling Detection, sampling observation rate is not less than 5%, and sample detection be entirely examine;
8) to step 7) in detect qualified plunger finished product carry out cleaning corrosion protection degaussing process;
9) to step 8) in carry out cleaning plunger finished appearance that corrosion protection degaussing is disposed detect qualified after, encapsulation warehouse-in is stand-by;
2, the preparation of piston shoes 2
1) choose body material, free-cutting brass bar selected by body material, adopts double dynamical main shaft automatic lathe to process, and staying following process surplus simultaneously, obtaining piston shoes base substrate when processing piston shoes inner ball surface 2-6; And Production development sampling observation detector is installed in double dynamical main shaft automatic lathe, detect critical size, to ensure the machining accuracy produced in batches, effectively control scrappage;
2) until step 1) in after piston shoes base substrate completion of processing, piston shoes base substrate grinds piston shoes inner ball surface 2-6 to design size requirement;
3) treat step 2) in after piston shoes inner ball surface 2-6 on piston shoes base substrate grinds, cleaning corrosion protection process is carried out to piston shoes base substrate, obtains piston shoes product;
4) to step 3) in the piston shoes finished product that obtains carry out sampling Detection, sampling observation rate is not less than 5%, and sample detection be entirely examine;
5) to step 4) in detect qualified piston shoes finished appearance detect qualified after, encapsulation warehouse-in is stand-by;
3, plunger 1 and piston shoes 2 are assembled
The stand-by piston shoes 2 of encapsulation warehouse-in are set on plunger 1, and carry out shrinkage treatment, and axial clearance 0.015mm ~ 0.07mm.
More than show and describe basic principle of the present invention and major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (9)
1. hydraulic pump plunger slippery boots assembly, comprise plunger and piston shoes, it is characterized in that, plunger and piston shoes are riveted, and on piston shoes, be provided with the closing in fixed structure of locating for plunger and piston shoes, plunger is provided with the plunger cylindrical for being installed in plunger cylinder, and plunger cylindrical lower end and end face transition position are provided with cylindrical bottom transition circular arc; Bulb neck and plunger ball is provided with above plunger cylindrical, plunger cavity is provided with plunger inner conical surface, plunger inner conical surface top is communicated with plunger oil duct by inner transition conical surface transition, plunger ball top is provided with oil circuit tapered channel, and plunger oil duct is communicated with oil circuit tapered channel by plunger damping hole; Closing in fixed structure is arranged on piston shoes inner chamber, and piston shoes inner ball surface is provided with inside closing in fixed structure, and be provided with piston shoes oil duct in the middle of piston shoes inner ball surface, piston shoes oil duct is communicated with piston shoes taper oil duct by piston shoes damping hole, and piston shoes damping hole periphery is provided with one-level pressure-bearing die cavity, secondary pressure-bearing die cavity and three grades of pressure-bearing die cavities, on one-level pressure-bearing die cavity, be provided with one-level damping oil duct simultaneously, secondary pressure-bearing die cavity is provided with secondary damping oil duct, three grades of pressure-bearing die cavities are provided with three-stage damping oil duct; In addition, plunger inner conical surface lower body portions is that Small Taper is arranged, and oil circuit tapered channel is communicated with piston shoes oil duct, and one-level pressure-bearing die cavity, secondary pressure-bearing die cavity and three grades of pressure-bearing die cavities are set for the eccentric, eccentricity range 0.5mm ~ 0.6mm.
2. hydraulic pump plunger slippery boots assembly according to claim 1, it is characterized in that, plunger and piston shoes keep relative motion fluent, and hinged angle of revolution is-21 ° ~+21 °, and gap 0.015mm ~ 0.05mm to axial, riveted joint stretching resistance is not less than 4500N.
3. hydraulic pump plunger slippery boots assembly according to claim 1, it is characterized in that, plunger ball and bulb neck transition position are provided with plunger first annular end face, be provided with plunger First Transition circular arc between plunger first annular end face and plunger ball, between plunger first annular end face and bulb neck, be provided with plunger second transition arc.
4. hydraulic pump plunger slippery boots assembly according to claim 1, is characterized in that, plunger cylindrical upper end and bulb neck transition position are provided with plunger second annular end face, is provided with plunger the 3rd transition arc between plunger second annular end face and plunger cylindrical.
5. hydraulic pump plunger slippery boots assembly according to claim 1, it is characterized in that, closing in fixed structure comprises piston shoes transition conical surface, closing in transition inner ring road, close up interior scarce circle, closing in transition arc and piston shoes conical surface, wherein, piston shoes conical surface is arranged on the end face that piston shoes and plunger rivet, lack circle one end in closing up to be connected with piston shoes conical surface by closing in transition arc, the other end is connected with closing in transition inner ring road, and piston shoes transition conical surface is arranged on inside closing in transition inner ring road.
6. hydraulic pump plunger slippery boots assembly according to claim 1, is characterized in that, piston shoes outer installment has piston shoes annular end face and piston shoes transition cylindrical.
7. hydraulic pump plunger slippery boots assembly according to claim 6, is characterized in that, piston shoes annular end face and piston shoes transition cylindrical junction are provided with piston shoes anti-interference deep gouge.
8. hydraulic pump plunger slippery boots assembly processing method, is characterized in that, concrete steps are as follows:
1, the preparation of plunger
1) choose body material, modified polishing bar selected by body material, adopts double dynamical main shaft automatic lathe to process, and stays following process surplus simultaneously, obtain plunger base substrate at processing plunger ball and the outer bowlder of plunger; And Production development sampling observation detector is installed in double dynamical main shaft automatic lathe;
2) to step 1) in obtain plunger base substrate carry out surface gas nitriding treatment, grinding front surface hardness is not less than 850HV0.2, depth of penetration 0.35 ~ 0.5mm;
3) until step 2) in after the gas nitriding of plunger billet surface is disposed, its two ends are located, adopt form grinding machine corase grind to cut plunger ball and plunger cylindrical;
4) treat step 3) in after plunger base substrate corase grind cuts, then grind plunger ball to design size requirement;
5) again to location, plunger base substrate two ends, and high-precision peripheral milling is adopted to refine plunger cylindrical;
6) step 5 is treated) after center pillar plug fine grinding cylinder, softer polishing plunger ball and plunger cylindrical, and each transition arc of round and smooth polishing, obtain plunger finished product;
7) to step 6) in the plunger finished product that obtains carry out sampling Detection, sampling observation rate is not less than 5%, and sample detection be entirely examine;
8) to step 7) in detect qualified plunger finished product carry out cleaning corrosion protection degaussing process;
9) to step 8) in carry out cleaning plunger finished appearance that corrosion protection degaussing is disposed detect qualified after, encapsulation warehouse-in is stand-by;
2, the preparation of piston shoes
1) choose body material, free-cutting brass bar selected by body material, adopts double dynamical main shaft automatic lathe to process, and staying following process surplus simultaneously, obtaining piston shoes base substrate when processing piston shoes inner ball surface; And Production development sampling observation detector is installed in double dynamical main shaft automatic lathe;
2) until step 1) in after piston shoes base substrate completion of processing, piston shoes base substrate grinds piston shoes inner ball surface to design size requirement;
3) treat step 2) in after piston shoes inner ball surface grinding on piston shoes base substrate, cleaning corrosion protection process is carried out to piston shoes base substrate, obtains piston shoes product;
4) to step 3) in the piston shoes finished product that obtains carry out sampling Detection, sampling observation rate is not less than 5%, and sample detection be entirely examine;
5) to step 4) in detect qualified piston shoes finished appearance detect qualified after, encapsulation warehouse-in is stand-by;
3, plunger and piston shoes are assembled
The stand-by piston shoes of encapsulation warehouse-in are set on plunger, and carry out contraction riveted joint process.
9. hydraulic pump plunger slippery boots assembly processing method according to claim 8, is characterized in that, the axial clearance 0.015mm ~ 0.07mm of plunger and piston shoes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850155.4A CN104533780B (en) | 2014-12-30 | 2014-12-30 | Hydraulic pump plunger and sliding shoe assembly and machining method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850155.4A CN104533780B (en) | 2014-12-30 | 2014-12-30 | Hydraulic pump plunger and sliding shoe assembly and machining method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104533780A true CN104533780A (en) | 2015-04-22 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105215685A (en) * | 2015-09-22 | 2016-01-06 | 宁波市鄞州欧姆柯液压机电有限公司 | The preparation method of plunger piston slippery boots assembly |
| CN107781157A (en) * | 2017-10-24 | 2018-03-09 | 徐州工业职业技术学院 | A kind of hydraulic pump plunger for reducing flow pulsation |
| CN110608165A (en) * | 2018-06-15 | 2019-12-24 | 郑州奥特科技有限公司 | Plunger assembly, lubricating pump, plunger and plunger machining method |
| CN112222788A (en) * | 2020-10-23 | 2021-01-15 | 江苏远业液压机械有限公司 | Plunger piston shoe machining method |
| CN112894271A (en) * | 2020-12-29 | 2021-06-04 | 沈阳黎明航空零部件制造有限公司 | Processing technology of filter shell |
| CN113236551A (en) * | 2021-05-11 | 2021-08-10 | 北京中金泰达电液科技有限公司 | Plunger piston shoe assembly and plunger pump |
| CN114382671A (en) * | 2021-10-29 | 2022-04-22 | 中国航发西安动力控制科技有限公司 | Method for selecting and matching plunger assembly with retainer ring |
| CN115095497A (en) * | 2022-07-11 | 2022-09-23 | 济南博尔动力设备有限公司 | Plunger pump |
Families Citing this family (1)
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| DE102020203679A1 (en) | 2020-03-23 | 2021-09-23 | Robert Bosch Gesellschaft mit beschränkter Haftung | Slide shoe for a piston of an axial piston machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105215685A (en) * | 2015-09-22 | 2016-01-06 | 宁波市鄞州欧姆柯液压机电有限公司 | The preparation method of plunger piston slippery boots assembly |
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| CN112222788A (en) * | 2020-10-23 | 2021-01-15 | 江苏远业液压机械有限公司 | Plunger piston shoe machining method |
| CN112894271A (en) * | 2020-12-29 | 2021-06-04 | 沈阳黎明航空零部件制造有限公司 | Processing technology of filter shell |
| CN113236551A (en) * | 2021-05-11 | 2021-08-10 | 北京中金泰达电液科技有限公司 | Plunger piston shoe assembly and plunger pump |
| CN114382671A (en) * | 2021-10-29 | 2022-04-22 | 中国航发西安动力控制科技有限公司 | Method for selecting and matching plunger assembly with retainer ring |
| CN114382671B (en) * | 2021-10-29 | 2023-08-08 | 中国航发西安动力控制科技有限公司 | Selection and matching method of plunger assembly with retainer ring |
| CN115095497A (en) * | 2022-07-11 | 2022-09-23 | 济南博尔动力设备有限公司 | Plunger pump |
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