CN114233595B - Plunger piston shoe assembly, plunger pump and plunger motor - Google Patents
Plunger piston shoe assembly, plunger pump and plunger motor Download PDFInfo
- Publication number
- CN114233595B CN114233595B CN202111392100.XA CN202111392100A CN114233595B CN 114233595 B CN114233595 B CN 114233595B CN 202111392100 A CN202111392100 A CN 202111392100A CN 114233595 B CN114233595 B CN 114233595B
- Authority
- CN
- China
- Prior art keywords
- plunger
- sliding shoe
- barrel
- wall
- ball head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 42
- 238000003825 pressing Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 21
- 238000005096 rolling process Methods 0.000 description 10
- 230000003068 static effect Effects 0.000 description 8
- 239000010720 hydraulic oil Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910000906 Bronze Inorganic materials 0.000 description 3
- 239000010974 bronze Substances 0.000 description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
- F04B1/124—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
- F04B1/124—Pistons
- F04B1/126—Piston shoe retaining means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0469—Other heavy metals
- F05C2201/0475—Copper or alloys thereof
- F05C2201/0478—Bronze (Cu/Sn alloy)
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a plunger piston shoe assembly, a plunger pump and a plunger motor, wherein the plunger piston shoe assembly comprises a plunger and a piston shoe which are connected through a spherical hinge, the plunger comprises a plunger rod and a plunger barrel which are in penetrating fit, a plunger ball head is arranged at the end part of the plunger rod, a plunger barrel concave spherical surface concentric with the plunger ball head is arranged at the end part of the plunger barrel, the plunger barrel concave spherical surface is arranged at intervals with the outer wall surface of the plunger ball head, the piston shoe comprises a piston shoe spherical shell concentric with the plunger ball head, one end of the piston shoe spherical shell, which is away from the plunger, is provided with a mounting hole, one end, which is close to the plunger, is provided with a yielding hole for the plunger rod to rotate, and the inner wall surface of the piston shoe spherical shell is in sliding fit with the plunger ball head and the outer wall surface of the plunger barrel concave spherical surface is in sliding fit; the plunger pump and the plunger motor are internally provided with the plunger sliding shoe assembly. The plunger piston shoe assembly is simple in manufacture, high in precision, high in yield, high in connection strength and long in service life, and the plunger pump and the plunger motor applying the plunger piston shoe assembly are high in mechanical efficiency and volumetric efficiency.
Description
Technical Field
The invention relates to the technical field of plungers, in particular to a plunger sliding shoe assembly, a plunger pump and a plunger motor.
Background
The plunger sliding shoe component is used as a key part of the plunger pump and the plunger motor, and the performance of the plunger sliding shoe component directly influences the overall performance of the plunger pump and the plunger motor. The existing plunger sliding shoe assembly is in a rolling structure, namely, the end part of a plunger and the end part of a sliding shoe are rolled into a hinged pair through a ball socket and a ball head.
The invention patent application of China, which is published as 2018.12.18 and is published as CN 109026582A, discloses an anti-eccentric plunger piston shoe assembly, a plunger pump and a plunger motor for assembling the same, wherein the anti-eccentric plunger piston shoe assembly comprises a plunger and a piston shoe which are matched with a ball head rolling bag through a ball socket, the plunger comprises a plunger body, a cavity is formed in the plunger body along the axis direction, a spring seat, a valve core and a spring are sequentially arranged in the cavity along the axis direction, an oil through hole is formed in the spring seat along the axis direction, the radial size of the valve core is larger than the radial size of the oil through hole and smaller than the radial size in the cavity, a damping hole is formed in the plunger body or the piston shoe, the end face of the piston shoe contacts with the end face of a swash plate during operation, a cavity is formed between the end face of the swash plate and the end face of the swash plate, and the damping hole can be communicated with the cavity of the plunger body.
There are various disadvantages to articulating the plunger and slipper by the roller package: first, if the roll gap is small, although the connection strength can be improved, the probability of the revolute pair jamming increases, and the mechanical efficiency of the work decreases, if the roll gap is large, although the probability of jamming can be reduced, the connection strength decreases, there is a large risk of falling off, and the hydraulic oil leaks during the work, and the volumetric efficiency of the work decreases. Secondly, the rolling process is complex, the precision is difficult to control, and the yield is low.
Disclosure of Invention
Aiming at the defects in the background art, the invention provides a plunger sliding shoe assembly, a plunger pump and a plunger motor, and solves the technical problems that the existing plunger sliding shoe assembly adopts a rolling structure, so that the yield is low, and the volumetric efficiency and the mechanical efficiency cannot be improved simultaneously.
The technical scheme of the invention is realized as follows: the utility model provides a plunger piston shoe subassembly, includes plunger and the piston shoe that the spherical hinge connects, the plunger is including interlude complex plunger rod and plunger section of thick bamboo, and the tip of plunger rod is provided with the plunger bulb, and the tip of plunger section of thick bamboo is provided with the concentric concave sphere of plunger barrel with the plunger bulb, and the concave sphere of plunger barrel sets up with the outer wall interval of plunger bulb, the piston shoe includes the concentric piston shoe spherical shell with the plunger bulb, and the one end that the piston shoe spherical shell deviates from the plunger is provided with the mounting hole, is close to the one end of plunger and is provided with the hole of stepping down that supplies the plunger rod to rotate, the inner wall and the plunger bulb sliding fit of piston shoe spherical shell, outer wall and the concave sphere sliding fit of plunger barrel.
Further, a sealing support is connected to one end of the plunger rod, which is away from the sliding shoe, and the plunger barrel is pressed between the sealing support and the sliding shoe. The plunger rod and the sealing support are welded by vacuum electron beam, and the connection is firm and not easy to fall off.
Further, a large diameter hole and a small diameter hole are formed in the plunger barrel, a spring is supported between a second step surface between the large diameter hole and the small diameter hole and the bottom surface of the sealing support, the outer wall surface of the plunger ball head has a trend of being tightly attached to the inner wall surface of the spherical shell of the sliding shoe under the pretightening supporting force provided by the spring, and the concave spherical surface of the plunger barrel has a trend of being tightly attached to the outer wall surface of the spherical shell of the sliding shoe.
Further, the sealing support comprises a body, one end of the body, which is away from the sliding shoe, is provided with a high-pressure oil groove, the side wall of the high-pressure oil groove is of a thin-wall structure, the plunger naturally expands to the periphery to generate slight deformation when in high-pressure work, and the thin-wall structure generating slight deformation is clung to the inner wall of the plunger cylinder body.
Further, the vertical section of the thin-wall structure is trapezoid, the long bottom edge of the trapezoid is close to the bottom of the high-pressure oil groove, the short bottom edge of the trapezoid is the notch end face of the high-pressure oil groove, and the bevel edge side of the trapezoid is the inner wall of the high-pressure oil groove.
Further, the body extends towards one end of the sliding shoe and is provided with an inverted conical structure, the diameter of the inverted conical structure is smaller than that of the body, a first step surface between the body and the inverted conical structure axially corresponds to the thin-wall structure, the end part of the plunger cylinder is provided with a conical hole matched with the inverted conical structure, and the end face of the plunger cylinder is axially propped against and matched with the first step surface.
Further, the sealing support is provided with a central through hole, the end part of the plunger rod connected with the sealing support is in plug-in fit with the central through hole, the diameter of the end part of the plunger rod inserted into the central through hole is smaller than that of the part which is not inserted into the central through hole, the lower end surface of the sealing support is supported on a third step surface of a diameter changing part of the plunger rod, and a plunger orifice is arranged penetrating through the plunger rod and the plunger ball head.
Further, the sealing support is made of bronze material with softer material.
A plunger pump mounts the plunger shoe assembly.
A plunger motor mounts the plunger shoe assembly.
The technical scheme of the invention has the beneficial effects that:
1. The invention abandons the rolling technology in the traditional plunger piston shoe assembly, adopts the mechanically-formed piston shoe spherical shell, plunger ball head and plunger cylinder concave spherical surface, and has even contact between the inner wall surface of the piston shoe spherical shell and the plunger ball head and between the outer wall surface of the piston shoe spherical shell and the plunger cylinder concave spherical surface without blocking points. The connecting strength and the sealing performance are higher than those of the traditional rolling technology in high-pressure working, the bearing pressure is higher, the volumetric efficiency and the mechanical efficiency in working can be improved simultaneously, in addition, the assembly qualification rate and the consistency of the plunger sliding shoe assembly can be improved, and the yield is high;
2. In the plunger piston shoe assembly, the sealing support is made of a bronze material with softer material, the thin-wall structure naturally expands when in high-pressure operation, slight deformation is generated to be tightly attached to the inner wall of the plunger cylinder, the sealing performance is improved, and the volumetric efficiency of the plunger pump or the plunger motor can be further improved; in addition, when the seal carrier is deformed radially, the corresponding axial direction is slightly deformed: on one hand, the axial deformation generated by the first step surface corresponding to the thin-wall structure causes the trend of pressing down the plunger barrel after the axial deformation, so that the outer wall surface of the spherical shell of the sliding shoe in the high-pressure environment is more tightly attached to the concave spherical surface of the plunger barrel; on the other hand, the part of the sealing support corresponding to the spring generates slight axial deformation, and the axial deformation has the trend of further extruding the spring, so that the concave spherical surface of the plunger barrel has the trend of further pressing the outer wall surface of the spherical shell of the sliding shoe, the plunger ball head of the plunger rod has the trend of further keeping away from the inner wall surface of the spherical shell of the sliding shoe, and the sliding shoe is more tightly connected with the spherical hinge pair of the plunger in a high-pressure environment;
3. In the plunger sliding shoe assembly, the spring generates a pressing force between the plunger barrel and the plunger rod, so that the plunger ball of the plunger rod has a trend of deviating from the movement of the sliding shoe ball shell, the concave spherical surface of the plunger barrel has a trend of pressing the sliding shoe ball shell, the inner wall surface of the sliding shoe ball shell is tightly attached to the plunger ball, the outer wall surface of the sliding shoe ball shell is tightly attached to the concave spherical surface of the plunger barrel, hydraulic oil leakage during working is further avoided, and volumetric efficiency is further improved;
4. In the plunger piston shoe assembly, the plunger is in spherical sliding fit with the piston shoe spherical shell through the concave spherical surface of the plunger cylinder and the plunger ball head, so that double-layer spherical pairs are formed, the double-layer spherical pairs are mutually nested, the plunger ball head is circumferentially limited by the inner wall of the piston shoe spherical shell, and the outer wall of the piston shoe spherical shell is circumferentially limited by the concave spherical surface of the plunger cylinder. The structure has high connection strength, and the concave spherical surface of the plunger cylinder is a bad concave spherical surface, so that the use of a perfect concave spherical surface in a rolling structure is avoided, and the rotation range of the plunger along the central shaft of the sliding shoe is larger and more flexible on the premise of ensuring the connection strength, the sealing performance and the smoothness;
5. In the plunger piston shoe assembly, high-pressure oil in the high-pressure oil groove of the sealing support is led into the static pressure groove at the bottom of the piston shoe through the plunger throttling hole in the middle of the plunger rod, and in the use process, hydraulic oil flowing into the static pressure groove can generate static pressure support between the piston shoe and a sloping cam plate of the plunger pump, so that a friction surface is protected, and static pressure support is provided for a plunger ball head in a ball shell of the piston shoe, so that the plunger ball head is further tightly attached to the inner wall surface of the ball shell of the piston shoe in a high-pressure environment.
6. The plunger piston shoe assembly can meet the operation of an ultra-high pressure plunger pump and an ultra-high pressure plunger motor.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings that are required for the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic cross-sectional view of the present application;
In the figure:
1. a plunger;
11. plunger rod, 111, plunger ball head, 112, step surface, 113, external expansion chamfer;
12. The plunger cylinder comprises a plunger cylinder body 121, a concave spherical surface of the plunger cylinder body 122, a large-diameter hole 123, a small-diameter hole 124 and a second step surface;
13. A sealing support, 131, a high-pressure oil tank, 132 and a thin-wall structure, 133, an inverted cone structure, 134, a first step surface, 135 and a central through hole;
14. A spring;
2. the shoe comprises a shoe body, a shoe ball shell, a shoe mounting hole, a shoe clearance hole and a shoe clearance groove.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
In the embodiment 1, as shown in fig. 1, a plunger sliding shoe assembly comprises a plunger 1 and a sliding shoe 2 which are connected in a spherical hinge manner, wherein the plunger 1 comprises a plunger rod 11 and a plunger barrel 12 which are matched in a penetrating manner, and the plunger rod 11 and the plunger barrel 12 are manufactured by adopting mechanical processing and then are assembled. The end part of the plunger rod 11 is mechanically processed with a plunger ball head 111, the end part of the plunger barrel 12 is mechanically processed with a plunger barrel concave spherical surface 121 concentric with the plunger ball head 111, the plunger barrel concave spherical surface 121 and the outer wall surface of the plunger ball head 111 are arranged at intervals, and a spherical shell cavity is formed between the plunger barrel concave spherical surface 121 and the plunger ball head 111.
The sliding shoe 2 comprises a sliding shoe spherical shell 21 concentric with the plunger spherical head 111, and the sliding shoe spherical shell 21 is machined. The end of the shoe ball housing 21 facing away from the plunger 1 is provided with a mounting hole 22, and the end near the plunger 1 is provided with a yielding hole 23 for the plunger rod 11 to rotate. After the plunger rod 11, the plunger barrel 12 and the sliding shoe 2 are machined, during assembly, firstly, the ball-free end of the plunger rod 11 passes through the mounting hole 22 and passes out of the abdication hole 23, so that the plunger ball head 111 is tightly attached to the inner wall of the sliding shoe ball shell 21, then the plunger barrel 12 is sleeved outside the plunger rod 11, the concave spherical surface 121 of the plunger barrel is tightly attached to the outer wall of the sliding shoe ball shell 21, and then the plunger barrel 12 is connected with the plunger rod 11. Meanwhile, the sliding fit of the inner wall surface of the slipper ball shell 21 and the plunger ball head 111 is realized, and the sliding fit of the outer wall surface of the slipper ball shell 21 and the plunger barrel concave spherical surface 121 is realized.
The embodiment abandons the rolling process in the traditional plunger piston shoe assembly, adopts the mechanically-formed piston shoe spherical shell 21, the plunger ball head 111 and the plunger barrel concave spherical surface 121, and has even contact between the inner wall surface of the piston shoe spherical shell 21 and the plunger ball head 111 and between the outer wall surface of the piston shoe spherical shell 21 and the plunger barrel concave spherical surface 121 without stagnation points. The connecting strength and the sealing performance are higher than those of the traditional rolling technology in high-pressure working, the bearing pressure is higher, the volumetric efficiency and the mechanical efficiency in working can be improved at the same time, and in addition, the assembly qualification rate and the consistency of the plunger sliding shoe assembly can be improved;
In addition, in this embodiment, the plunger 1 is in spherical sliding fit with the shoe spherical shell 21 through the concave spherical surface 121 of the plunger barrel and the spherical head 111 of the plunger, so that not only are double-layer spherical pairs formed, but also the inner wall of the shoe spherical shell 21 is mutually nested, the spherical head 111 of the plunger is circumferentially limited, and the concave spherical surface 121 of the plunger barrel circumferentially limits the outer wall of the shoe spherical shell 21. The structure has high connection strength, and the concave spherical surface 121 of the plunger barrel is a poor concave spherical surface, so that the use of a perfect concave spherical surface in a rolling structure is avoided, and the rotation range of the plunger along the central shaft of the sliding shoe is larger and more flexible on the premise of ensuring the connection strength, the sealing performance and the smoothness, as shown in fig. 1, and the rotation angle range is theta.
In embodiment 2, as shown in fig. 1, a sealing support 13 is connected to one end of the plunger rod 11 facing away from the sliding shoe 2, the plunger barrel 12 is pressed between the sealing support 13 and the sliding shoe 2, and the plunger rod 11 and the plunger barrel 12 are connected through the sealing support 13. The plunger rod 11 and the sealing support 13 are welded by vacuum electron beam, and the connection is firm and not easy to fall off.
Further, a large diameter hole 122 and a small diameter hole 123 are provided in the plunger barrel 12, the large diameter hole 123 is in clearance fit or tight fit with the plunger rod 11, and a spring 14 is provided between the outer wall of the plunger rod 11 and the inner wall of the large diameter hole 122. Since the plunger barrel 12 has different inner diameters, a second step surface 124 is arranged between the large diameter hole 122 and the small diameter hole 123, and two ends of the spring 14 are respectively supported between the second step surface 124 and the bottom surface of the sealing support 13. Under the pretension supporting force provided by the spring 14, the outer wall surface of the plunger ball 111 has a tendency to abut against the inner wall surface of the shoe ball housing 21, and the plunger barrel concave spherical surface 121 has a tendency to abut against the outer wall surface of the shoe ball housing 21. Under the pretension supporting force provided by the spring 14, the inner wall surface of the sliding shoe spherical shell 21 and the plunger ball head 111 are mutually tightly attached, the outer wall surface of the sliding shoe spherical shell 21 and the plunger cylinder concave spherical surface 121 are mutually tightly attached, hydraulic oil leakage during working is further avoided, and the volumetric efficiency is further improved on the premise of ensuring the mechanical efficiency.
Other structures of this embodiment are the same as those of embodiment 1.
In embodiment 3, as shown in fig. 1, the sealing support 13 includes a body, and a high-pressure oil groove 131 is disposed at one end of the body facing away from the sliding shoe 2, and when the plunger 1 works, high-pressure oil in the plunger cylinder body is pressed against the high-pressure oil groove 131. The side wall of the high-pressure oil groove 131 is a thin-wall structure 132, so that the thin-wall structure 132 naturally expands to the periphery to slightly deform when the plunger 1 works at high pressure, the slightly deformed thin-wall structure 132 clings to the inner wall of the plunger cylinder, the sealing performance is automatically improved under the high-pressure environment, and the volumetric efficiency is further improved.
Further, the vertical section of the thin-wall structure 132 is trapezoidal, the long bottom edge of the trapezoid is close to the bottom of the high-pressure oil groove 131, the short bottom edge of the trapezoid is the notch end surface of the high-pressure oil groove 131, and the bevel edge side of the trapezoid is the inner wall of the high-pressure oil groove 131. The structure not only ensures the structural strength of the high-pressure oil tank 131, but also enables the notch end face of the high-pressure oil tank 131 to be easier to deform, and further improves the sealing performance.
Other structures of this embodiment are the same as those of embodiment 2.
In embodiment 4, as shown in fig. 1, an inverted cone structure 133 extends toward one end of the sliding shoe 2, and the diameter of the inverted cone structure 133 is smaller than that of the body, so that a first step surface 134 is formed between the body and the inverted cone structure 133. The first step surface 134 axially corresponds to the thin-wall structure 132, a tapered hole matched with the inverted tapered structure is formed at the end of the plunger barrel 12, and the end surface of the plunger barrel 12 is axially in abutting fit with the first step surface 134.
When the sealing seat 13 is deformed radially, a slight deformation is also produced in the axial direction corresponding thereto: on the one hand, the first step surface 134 corresponding to the thin-wall structure 132 generates axial deformation, and the first step surface 134 after the axial deformation generates a trend of pressing down the plunger barrel 12, so that the outer wall surface of the slipper spherical shell 21 in a high-pressure environment is more tightly attached to the concave spherical surface 121 of the plunger barrel; on the other hand, the part of the sealing support 13 corresponding to the spring 14 generates slight axial deformation, and the axial deformation has a trend of further pressing the spring 14, so that the concave spherical surface 121 of the plunger barrel 12 has a trend of further pressing the outer wall surface of the shoe spherical shell 21, the plunger ball 111 of the plunger rod 11 has a trend of further moving away from the inner wall surface of the shoe spherical shell 21, and the connection between the shoe 2 and the spherical hinge pair of the plunger 1 is tighter in a high-pressure environment.
Further, the sealing support 13 is made of a soft bronze material, the thin-wall structure 132 is naturally expanded when working at high pressure, slight deformation is generated to be tightly attached to the inner wall of the plunger cylinder, the sealing performance is improved, and the volumetric efficiency of the plunger pump or the plunger motor can be further improved.
Other structures of this embodiment are the same as those of embodiment 2 or 3.
In embodiment 5, as shown in fig. 1, the sealing support 13 is provided with a central through hole 135, the end of the plunger rod 11 connected to the sealing support 13 is in plug-in fit with the central through hole 135, and the welding position of the vacuum electron beam is the position of the plunger rod 11 inserted into the central through hole 135.
The diameter of the end of the plunger rod 11 inserted into the central through hole 135 is smaller than the diameter of the part not inserted into the central through hole 135, and the step surface of the plunger rod 11 at the joint position of the sections with different diameters is marked as a third step surface 112. The lower end surface of the sealing support 13 is supported on a third step surface 112, a plunger orifice 114 is arranged through the plunger rod 11 and the plunger ball head 111, and an expanding chamfer 113 is arranged at one end of the plunger orifice 114, which is positioned at the plunger ball head 111.
When the plunger shoe assembly of the present embodiment is used, high pressure oil in the high pressure oil tank 131 of the seal holder 13 is introduced into the static pressure tank 24 at the bottom of the shoe 2 through the plunger orifice 114 in the middle of the plunger rod 11. During use, hydraulic oil flowing into the static pressure groove 24 can generate static pressure support between the sliding shoe 2 and a swash plate of the plunger pump, so that a friction surface is protected, and static pressure support is provided for the plunger ball 111 in the sliding shoe ball shell 21, so that the plunger ball 111 is further tightly attached to the inner wall surface of the sliding shoe ball shell 21 in a high-pressure environment.
Other structures of this embodiment may be the same as any one of embodiments 2 to 4.
Embodiment 6, a plunger pump having a plunger shoe assembly mounted thereto, the plunger shoe assembly having the same structure as any one of embodiments 1 to 5.
Embodiment 7, a plunger motor having a plunger shoe assembly mounted thereto, the plunger shoe assembly may have the same structure as any one of embodiments 1 to 5.
The present invention is not limited to the conventional technical means known to those skilled in the art.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. The utility model provides a plunger piston shoe subassembly, includes plunger (1) and piston shoe (2) that spherical hinge connects, its characterized in that: the plunger (1) comprises a plunger rod (11) and a plunger barrel (12) which are in penetrating fit, a plunger ball head (111) is arranged at the end part of the plunger rod (11), a plunger barrel concave spherical surface (121) concentric with the plunger ball head (111) is arranged at the end part of the plunger barrel (12), the plunger barrel concave spherical surface (121) and the outer wall surface of the plunger ball head (111) are arranged at intervals, the sliding shoe (2) comprises a sliding shoe spherical shell (21) concentric with the plunger ball head (111), one end of the sliding shoe spherical shell (21) deviating from the plunger (1) is provided with a mounting hole (22), a yielding hole (23) for the plunger rod (11) to rotate is arranged at one end close to the plunger (1), and the inner wall surface of the sliding shoe spherical shell (21) is in sliding fit with the plunger ball head (111) and the outer wall surface of the sliding shoe spherical shell (121) is in sliding fit with the plunger barrel concave spherical surface (121);
One end of the plunger rod (11) deviating from the sliding shoe (2) is connected with a sealing support (13), and the plunger barrel (12) is pressed between the sealing support (13) and the sliding shoe (2);
A large-diameter hole (122) and a small-diameter hole (123) are formed in the plunger barrel (12), a spring (14) is supported between a second step surface (124) between the large-diameter hole (122) and the small-diameter hole (123) and the bottom surface of the sealing support (13), the outer wall surface of the plunger ball head (111) has a trend of being tightly attached to the inner wall surface of the sliding shoe spherical shell (21) under the pretightening supporting force provided by the spring (14), and the concave spherical surface (121) of the plunger barrel has a trend of being tightly attached to the outer wall surface of the sliding shoe spherical shell (21);
The sealing support (13) comprises a body, one end of the body, which is away from the sliding shoe (2), is provided with a high-pressure oil groove (131), the side wall of the high-pressure oil groove (131) is of a thin-wall structure (132), the thin-wall structure (132) naturally expands to the periphery to generate slight deformation when the plunger (1) works at high pressure, and the thin-wall structure (132) generating slight deformation is tightly attached to the inner wall of the plunger cylinder body;
The vertical section of the thin-wall structure (132) is trapezoid, the long bottom edge of the trapezoid is close to the bottom of the high-pressure oil groove (131), the short bottom edge of the trapezoid is the notch end face of the high-pressure oil groove (131), and the bevel edge side of the trapezoid is the inner wall of the high-pressure oil groove (131);
An inverted conical structure (133) extends towards one end of the sliding shoe (2), the diameter of the inverted conical structure (133) is smaller than that of the body, a first step surface (134) between the body and the inverted conical structure (133) axially corresponds to the thin-wall structure (132), a conical hole matched with the inverted conical structure is formed in the end portion of the plunger cylinder (12), and the end face of the plunger cylinder (12) is in axial abutting fit with the first step surface (134);
When the sealing support (13) is deformed radially, the corresponding axial direction is slightly deformed as well: axial deformation of the first step surface (134) corresponding to the thin-wall structure (132) occurs, and the first step surface (134) after the axial deformation has a tendency of pressing down the plunger barrel (12); the sealing support (13) and the part corresponding to the spring (14) generate slight axial deformation, and the axial deformation has the tendency of further pressing the spring (14).
2. The plunger shoe assembly of claim 1, wherein: the sealing support (13) is provided with a central through hole (135), the end part of the plunger rod (11) connected with the sealing support (13) is in plug-in fit with the central through hole (135), the diameter of the end part of the plunger rod (11) inserted into the central through hole (135) is smaller than the diameter of the part which is not inserted into the central through hole (135), the lower end surface of the sealing support (13) is supported on a third step surface (112) of a diameter change part of the plunger rod (11), and a plunger orifice (114) is arranged penetrating through the plunger rod (11) and the plunger ball head (111).
3. A plunger pump, characterized in that: the plunger pump is provided with the plunger shoe assembly of claim 1 or 2.
4. A plunger motor, characterized by: the plunger motor is fitted with a plunger shoe assembly as claimed in claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111392100.XA CN114233595B (en) | 2021-11-23 | 2021-11-23 | Plunger piston shoe assembly, plunger pump and plunger motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111392100.XA CN114233595B (en) | 2021-11-23 | 2021-11-23 | Plunger piston shoe assembly, plunger pump and plunger motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114233595A CN114233595A (en) | 2022-03-25 |
| CN114233595B true CN114233595B (en) | 2024-04-19 |
Family
ID=80750492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111392100.XA Active CN114233595B (en) | 2021-11-23 | 2021-11-23 | Plunger piston shoe assembly, plunger pump and plunger motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114233595B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6198977A (en) * | 1984-10-17 | 1986-05-17 | ル−トヴイヒ・モケシユ | Axial piston pump |
| SU1439273A1 (en) * | 1986-11-20 | 1988-11-23 | Белорусский Политехнический Институт | Axial-flow piston hydraulic machine |
| JPH07158557A (en) * | 1993-12-07 | 1995-06-20 | Mitsubishi Heavy Ind Ltd | Piston assembly of liquid-operated pump and motor |
| JPH1162850A (en) * | 1997-08-28 | 1999-03-05 | Honda Motor Co Ltd | Plunger assembly |
| CN1598308A (en) * | 2004-07-17 | 2005-03-23 | 兰州理工大学 | Axial plunger pump for water medium |
| CN101012817A (en) * | 2007-02-01 | 2007-08-08 | 华中科技大学 | Plunger piston slippery boots assembly |
| WO2014052594A1 (en) * | 2012-09-28 | 2014-04-03 | U.S. Environmental Protection Agency | Ball and socket joint retention for a hydraulic pump/motor |
| CN104500383A (en) * | 2014-11-20 | 2015-04-08 | 徐承韬 | Plunger pump sealing device |
| CN110701036A (en) * | 2018-07-10 | 2020-01-17 | 江苏可奈力机械制造有限公司 | Connect convenient novel spring and turn over a packet plunger structure |
| CN112431733A (en) * | 2020-11-20 | 2021-03-02 | 济宁信发液压有限公司 | Plunger type servo variable pump and reinforced plunger piston shoe assembly thereof |
-
2021
- 2021-11-23 CN CN202111392100.XA patent/CN114233595B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6198977A (en) * | 1984-10-17 | 1986-05-17 | ル−トヴイヒ・モケシユ | Axial piston pump |
| SU1439273A1 (en) * | 1986-11-20 | 1988-11-23 | Белорусский Политехнический Институт | Axial-flow piston hydraulic machine |
| JPH07158557A (en) * | 1993-12-07 | 1995-06-20 | Mitsubishi Heavy Ind Ltd | Piston assembly of liquid-operated pump and motor |
| JPH1162850A (en) * | 1997-08-28 | 1999-03-05 | Honda Motor Co Ltd | Plunger assembly |
| CN1598308A (en) * | 2004-07-17 | 2005-03-23 | 兰州理工大学 | Axial plunger pump for water medium |
| CN101012817A (en) * | 2007-02-01 | 2007-08-08 | 华中科技大学 | Plunger piston slippery boots assembly |
| WO2014052594A1 (en) * | 2012-09-28 | 2014-04-03 | U.S. Environmental Protection Agency | Ball and socket joint retention for a hydraulic pump/motor |
| CN104500383A (en) * | 2014-11-20 | 2015-04-08 | 徐承韬 | Plunger pump sealing device |
| CN110701036A (en) * | 2018-07-10 | 2020-01-17 | 江苏可奈力机械制造有限公司 | Connect convenient novel spring and turn over a packet plunger structure |
| CN112431733A (en) * | 2020-11-20 | 2021-03-02 | 济宁信发液压有限公司 | Plunger type servo variable pump and reinforced plunger piston shoe assembly thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114233595A (en) | 2022-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100251259B1 (en) | Method for improving fatigue strength due to repeated pressure at branch hole part in member for high pressure fluid, branch hole part of member, member for high pressure fluid with built-in slider having branch hole | |
| JP2016502036A (en) | Self-aligning piston and method for manufacturing this self-aligning piston | |
| GB2425819A (en) | Valve seat | |
| JP4800158B2 (en) | Rotating shaft seal | |
| CN105387017A (en) | Rotary actuator | |
| JP5741554B2 (en) | Piston type compressor | |
| CN114233595B (en) | Plunger piston shoe assembly, plunger pump and plunger motor | |
| JPH05502712A (en) | Annular support for seals for tilt pistons | |
| CN1321269C (en) | Static balance tilt cylinder type hydraulic motor | |
| CN108317118B (en) | Buckle type split plunger pump swash plate variable adjusting mechanism and adjusting method | |
| CN117072681A (en) | Sealing device and mechanical equipment with same | |
| WO2020075372A1 (en) | Shock absorber | |
| CN110848108A (en) | Axial plunger pump with improved plunger structure | |
| JPH1089241A (en) | Swash plate type hydraulic rotating machine | |
| CN101581298A (en) | Inclined plunger hydraulic pump/motor | |
| CN212601573U (en) | Ball valve bottom spring energy storage sealing washer demolishs frock | |
| CN113586428A (en) | Plunger body with bimetal structure and manufacturing method thereof, plunger pump and plunger motor | |
| JPH0712050A (en) | Piston rod connecting structure and connecting method for wabble type compressor | |
| CN2583386Y (en) | Oblique axis type axial plunger motor | |
| CN210196563U (en) | Eccentric micro-pressure loss check valve | |
| CN208441990U (en) | A kind of connecting rod and piston coupling structure of reciprocating compressor | |
| CN112283469B (en) | Pipeline connection sealing structure | |
| CN211230734U (en) | Axial plunger pump with improved plunger structure | |
| JP2000009025A (en) | Plunger assembly in axial plunger type hydraulic unit | |
| CN210949093U (en) | High-pressure seal ring installation protection structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |