CN111536011A - Self-return plunger and plunger pump thereof - Google Patents
Self-return plunger and plunger pump thereof Download PDFInfo
- Publication number
- CN111536011A CN111536011A CN202010513203.6A CN202010513203A CN111536011A CN 111536011 A CN111536011 A CN 111536011A CN 202010513203 A CN202010513203 A CN 202010513203A CN 111536011 A CN111536011 A CN 111536011A
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- China
- Prior art keywords
- plunger
- hole
- plunger pump
- pump
- return
- 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.)
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Classifications
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- 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
- F04B1/20—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 having rotary cylinder block
- F04B1/22—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 having rotary cylinder block having two or more sets of cylinders or pistons
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- 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
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- 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
- F04B1/20—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 having rotary cylinder block
- F04B1/2014—Details or component parts
-
- 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
- F04B1/20—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 having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2042—Valves
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- 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
- F04B1/20—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 having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2078—Swash plates
Abstract
The invention belongs to the technical field of plunger pumps, and particularly relates to a self-return plunger and a plunger pump thereof. The invention provides a self-return plunger and a plunger pump thereof, aiming at the problems that the plunger is easy to damage due to the return stroke of a plunger realized by a return stroke disc in the prior art and the return stroke disc has larger loss. According to the invention, the guide rod is connected to the plunger body, and the return stroke of the plunger body is realized by pushing the guide rod, so that a return stroke disc is not required.
Description
Technical Field
The invention belongs to the technical field of plunger pumps, and particularly relates to a self-return plunger and a plunger pump thereof.
Background
The plunger pump is an important device of the hydraulic system. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity so as to absorb and press oil. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like. In the prior art, the plunger return of the plunger pump mainly depends on the application of pulling force on a sliding shoe in the rotation process of a return disc, so that the return of the plunger is realized. However, in the use process, the return disc usually has a faster rotating speed, which can cause the sliding shoe to be easily pulled off from the plunger, resulting in damage to the plunger, and meanwhile, the return disc has larger loss, resulting in a shorter service life of the whole plunger pump.
For example, the chinese utility model discloses a forced return stroke dish distribution plunger type water pump [ application number: 201720285846.3], the utility model discloses a pump, including pump main part, rotary unit, valve plate and return stroke mechanism, wherein, the pump main part includes casing, rear end cap, front end housing and sloping cam plate, the inner wall circumference of casing is provided with a plurality of spacing rings, be provided with the spring hole on the spacing ring, rear end cap and front end housing are installed respectively at the front end and the rear end of casing, the rear end cap includes the lid and stretches into the main shaft of support in the casing, the sloping cam plate is installed on the main shaft of support and the sloping cam plate is kept away from the terminal surface of lid and is the inclined plane, be provided with water pump inlet and water pump outlet on the front end housing; the flow distribution disc is arranged in the pump main body and is fixedly arranged on the front end cover, a kidney-shaped groove and a through groove are formed in the flow distribution disc, the kidney-shaped groove is communicated with a water pump outlet, and the through groove is communicated with a water pump inlet and a cavity; the rotating unit comprises a transmission shaft, a cylinder body, a plunger piston shoe assembly, a main bearing, a floating disc, a spring seat and a center spring, the transmission shaft is rotatably arranged on the front end cover, the cylinder body is provided with a through hole, the rear end of the transmission shaft penetrates through the front end cover and then extends into the shell and is fixedly connected to the cylinder body, the cylinder block is rotatably arranged on a supporting main shaft of the rear end cover through the main bearing, the plunger and slipper assembly is circumferentially provided with a plurality of plunger and slipper assemblies which are all positioned in a cylinder hole of the cylinder block, the floating disc is arranged between the cylinder body and the port plate and is fixedly arranged on the port plate, the spring seat is rotatably arranged on a supporting main shaft of the rear end cover, the central spring is positioned in the through hole of the cylinder body, the rear end of the central spring abuts against the spring seat, and the front end of the central spring abuts against the transmission shaft; the return mechanism comprises a return disc, a plurality of return springs, a wedge-shaped sleeve and an anti-rotation pin, the return disc is located between the swash plate and the wedge-shaped sleeve, each plunger piston shoe assembly is abutted to the inclined surface of the swash plate after penetrating through the return disc respectively, the return disc is obliquely arranged, the inclination of the return disc is consistent with that of the inclined surface of the swash plate, each return spring is installed in a spring hole of the limiting ring, one end of each return spring is abutted to the inner wall of the limiting ring, and the other end of each return spring is pressed tightly against the return disc through the wedge-shaped sleeve.
The plunger piston return stroke is realized by applying a pulling force to the plunger piston by using the return stroke disc, so the problems that the plunger piston and the return stroke disc are easy to damage and the service life is short exist.
Disclosure of Invention
The present invention is directed to solving the above problems and providing a self-return plunger that can effectively prolong the life of a plunger pump without a return disc.
Another object of the present invention is to solve the above problems, and to provide a plunger pump which can effectively prolong the life of the plunger pump without using a return disc.
In order to achieve the purpose, the invention adopts the following technical scheme:
the self-return plunger comprises a plunger body, wherein a guide rod capable of synchronously moving with the plunger body is further connected to the plunger body, and a gap is formed between the guide rod and the plunger body.
In the self-return plunger, the axis of the guide rod is parallel to the axis of the plunger body, and the guide rod is fixedly connected with the plunger body or integrally formed with the plunger body.
The utility model provides a plunger pump with from return stroke plunger, includes that inside has plunger pump cylinder body and the valve plate in plunger hole, the last hydraulic medium circulation hole that has a perfect understanding valve plate that has of valve plate, the plunger hole is linked together with hydraulic medium circulation hole, the plunger hole is equipped with a plurality of, and plunger body one-to-one sliding connection is downthehole at the plunger, still be equipped with the hydraulic pressure hole that resets isolated with the plunger hole in the plunger pump cylinder body, guide arm sliding connection is downthehole at the hydraulic pressure that resets, and the guide arm sets up with the hydraulic pressure hole one-to-one that resets, still includes the intercommunication groove, is linked together through the intercommunication groove between the hydraulic pressure hole that resets.
In the plunger pump, the communicating groove is formed in the surface of the plunger pump cylinder body, which is close to one end of the valve plate.
In the plunger pump, the thickness of the swash plate gradually increases from one end to the other end, the inclined surface on the swash plate is attached to one end, away from the thrust plate, of the plunger body, and the swash plate can push the plunger body to slide along the plunger hole by rotating the cylinder body of the plunger pump.
In the plunger pump, the plunger holes and the reset hydraulic holes are uniformly distributed along the circumferential direction of the axial lead of the plunger pump cylinder body.
The plunger pump further comprises an oil filling pipe connected to the plunger pump cylinder body or the valve plate, and the oil filling pipe is communicated with the communicating groove or the plunger hole through a one-way valve.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, the guide rod is connected to the plunger body, and the return stroke of the plunger body is realized by pushing the guide rod, so that a return stroke disc is not required to be arranged, and the problem that the plunger and the return stroke disc are easy to damage is avoided.
2. The plunger body is pushed to return by utilizing the communicating groove and the plunger hole which are filled with liquid and are communicated with each other to replace a traditional return disc, meanwhile, the liquid can be supplemented into the liquid system through the oil filling pipe, and the plunger body is easy to maintain after use.
Drawings
FIG. 1 is a schematic structural view of a self-retracting plunger;
FIG. 2 is a cross-sectional view of the plunger pump;
FIG. 3 is a schematic view of the construction of a plunger pump;
FIG. 4 is a schematic structural view of a part of the structure of the plunger pump;
in the figure: plunger body 1, guide rod 2, clearance 3, plunger pump cylinder body 4, valve plate 5, plunger hole 6, hydraulic pressure medium flow through hole 7, hydraulic pressure hole 8, intercommunication groove 9, sloping cam plate 10, inclined plane 11, oil filling pipe 12.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example 1
The embodiment provides a from return stroke plunger, as shown in fig. 1, including plunger body 1, still be connected with on plunger body 1 and be synchronous motion's guide arm 2 with plunger body 1, have clearance 3 between guide arm 2 and the plunger body 1, be equipped with clearance 3 and be convenient for go into isolation structure between plunger body 1 and the guide arm 2 to when guaranteeing to insert to plunger pump cylinder body 4, plunger body 1 and guide arm 2 are located two cavities of mutual isolation respectively, thereby realize the drive to guide arm 2.
When the plunger is used, hydraulic force acts on the pushing guide rod 2 to push the plunger body 1 to return, so that a return disc does not need to be arranged.
Preferably, the axis of the guide rod 2 is parallel to the axis of the plunger body 1, and the guide rod 2 is fixedly connected with the plunger body 1 or integrally formed with the plunger body. The guide rod 2 and the plunger body 1 are arranged in parallel to each other, so that the consistency of the sliding directions of the guide rod 2 and the plunger body 1 can be ensured, and the connection strength between the guide rod 2 and the plunger body 1 can be ensured only by a connection mode of fixed connection or integrated forming.
Example 2
The embodiment provides a plunger pump, which adopts the self-return plunger described in embodiment 1, and as shown in fig. 1-4, the plunger pump includes a plunger pump cylinder 4 and a port plate 5, each of which has a plunger hole 6 therein, the port plate 5 has a hydraulic medium flow through hole 7 penetrating the port plate 5, the plunger holes 6 are communicated with the hydraulic medium flow through holes 7, the plunger holes 6 are provided with a plurality of plunger holes 6, the plunger bodies 1 are slidably connected in the plunger holes 6 one by one, the plunger pump cylinder 4 is further provided with a reset hydraulic hole 8 isolated from the plunger holes 6, when the plunger bodies 1 are inserted into the plunger pump cylinder 4, an isolation structure for isolating the plunger holes 6 and the reset hydraulic holes 8 is located in the gap 3, the guide rods 2 are slidably connected in the reset hydraulic holes 8, and the guide rods 2 are arranged in one by one correspondence with the reset hydraulic holes 8, and further include a communication groove 9, the reset hydraulic holes 8 are communicated with each other through a communication groove 9. The communicating groove 9 and the reset hydraulic hole 8 are filled with liquid to realize pressure conduction, and the liquid can be hydraulic oil or other common liquid media in the prior art. The plunger piston type plunger pump further comprises a swash plate 10, the thickness of the swash plate 10 gradually increases from one end to the other end, an inclined surface 11 on the swash plate 10 is attached to one end, away from the valve plate 5, of the plunger body 1, and the swash plate 10 can push the plunger body 1 to slide along the plunger hole 6 by rotating the plunger pump cylinder body 4.
According to the invention, when the plunger pump is used, the plunger pump cylinder body 4 is rotated to drive the plunger body 1 in the plunger pump cylinder body 4 to rotate, and because the thicknesses of all the positions of the swash plate 10 at the bottom of the plunger body 1 are different, when the plunger body 1 rotates from one end with smaller thickness to one end with larger thickness, the inclined surface 11 exerts a pressure on the end part of the plunger body 1 in the rotating process, so that the plunger body 1 is further pressed into the plunger hole 6, and hydraulic oil is discharged through the hydraulic medium circulation hole 7 on the port plate 5. At this moment, connect in the hydraulic pressure hole 8 that resets is further extended to in this plunger body 1's guide arm 2 also in step, liquid in the hydraulic pressure hole 8 that resets is extruded to the intercommunication inslot 9, make the pressure increase in the intercommunication inslot 9, thereby liquid in the intercommunication inslot 9 gets into the hydraulic pressure hole 8 that resets of opposite side, liquid promotes the slide of the guide arm 2 in the hydraulic pressure hole 8 that resets, the part slides outside resetting the hydraulic pressure hole 8, thereby it slides outside plunger hole 6 to drive plunger body 1 part, it is spacing to laminate with inclined plane 11 until the one end of plunger body 1, accomplish plunger body 1's return stroke. In the return process of the plunger body 1, hydraulic oil is sucked through the hydraulic medium flow through hole 7 in the valve plate 5 to complete the oil suction action, and the reciprocating operation is that in the rotating process of the plunger pump cylinder body 4, one side of the valve plate 5 sucks oil and the other side discharges oil. Therefore, the invention uses the communicating groove 9 and the plunger hole 6 which are filled with liquid and are communicated with each other to replace the traditional return disc to push the plunger body 1 to return.
Preferably, the communication groove 9 is located on one end surface of the plunger pump cylinder 4 close to the port plate 5, and the communication groove 9 is recessed towards the inside of the plunger pump cylinder 4. The communicating groove 9 is formed in the surface of the plunger pump cylinder body 4, so that the communicating groove 9 is easy to process, and the production cost is saved.
Preferably, the plunger holes 6 and the reset hydraulic holes 8 are uniformly distributed along the circumferential direction of the axis of the plunger pump cylinder 4. Therefore, the uniformity and stability of oil absorption and oil discharge at two sides of the plunger pump can be ensured.
As shown in fig. 3, the oil filling device further comprises an oil filling pipe 12 connected to the plunger pump cylinder 4 or the port plate 5, wherein the oil filling pipe 12 is communicated with the communication groove 9 or the plunger hole 6 through a one-way valve, and the one-way valve can adopt a one-way valve structure commonly used in the prior art. The liquid system, namely the communication groove 9 and the plunger hole 6, is supplemented with liquid by the oil filling pipe 12, and the maintenance is easy after the use.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms plunger body 1, guide rod 2, gap 3, plunger pump block 4, port plate 5, plunger hole 6, hydraulic medium flow hole 7, hydraulic hole 8, communicating groove 9, swash plate 10, inclined surface 11, filler pipe 12, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (8)
1. A self-retracting plunger comprising a plunger body (1), characterized in that: the plunger piston is characterized in that the plunger piston body (1) is further connected with a guide rod (2) capable of synchronously moving with the plunger piston body (1), and a gap (3) is formed between the guide rod (2) and the plunger piston body (1).
2. The self-retracting plunger of claim 1, wherein: the axial lead of the guide rod (2) is parallel to the axial lead of the plunger body (1), and the guide rod (2) is fixedly connected with the plunger body (1) or integrally formed.
3. A plunger pump with a self-return plunger, comprising a plunger pump cylinder body (4) with a plunger hole (6) inside and a port plate (5), wherein the port plate (5) is provided with a hydraulic medium flow hole (7) penetrating through the port plate (5), and the plunger hole (6) is communicated with the hydraulic medium flow hole (7), characterized in that: plunger hole (6) are equipped with a plurality of, and plunger body (1) one-to-one ground sliding connection is in plunger hole (6), still be equipped with in plunger pump cylinder body (4) with isolated hydraulic pressure hole (8) that reset of plunger hole (6), guide arm (2) sliding connection is in hydraulic pressure hole (8) that resets, and guide arm (2) and hydraulic pressure hole (8) that resets one-to-one set up, still include intercommunication groove (9), are linked together through intercommunication groove (9) between the hydraulic pressure hole (8) that resets.
4. The plunger pump of claim 3, wherein: the communicating groove (9) is positioned on the surface of one end of the plunger pump cylinder body (4) close to the valve plate (5).
5. The plunger pump of claim 3, wherein: the plunger pump is characterized by further comprising a swash plate (10) with the thickness gradually increased from one end to the other end, an inclined surface (11) on the swash plate (10) is attached to one end, far away from the valve plate (5), of the plunger body (1), and the swash plate (10) can push the plunger body (1) to slide along the plunger hole (6) by rotating the plunger pump cylinder body (4).
6. The plunger pump of claim 5, wherein: the surface of one end of the plunger body (1) close to the swash plate (10) is arc-shaped.
7. The plunger pump of claim 3, wherein: the plunger piston holes (6) and the reset hydraulic holes (8) are uniformly distributed along the circumferential direction of the axial lead of the plunger piston pump cylinder body (4).
8. The plunger pump of claim 3, wherein: the oil filling device is characterized by further comprising an oil filling pipe (12) connected to the plunger pump cylinder body (4) or the valve plate (5), wherein the oil filling pipe (12) is communicated with the communication groove (9) or the plunger hole (6) through a one-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010513203.6A CN111536011A (en) | 2020-06-08 | 2020-06-08 | Self-return plunger and plunger pump thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010513203.6A CN111536011A (en) | 2020-06-08 | 2020-06-08 | Self-return plunger and plunger pump thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111536011A true CN111536011A (en) | 2020-08-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010513203.6A Pending CN111536011A (en) | 2020-06-08 | 2020-06-08 | Self-return plunger and plunger pump thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111536011A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796968A (en) * | 2020-12-03 | 2021-05-14 | 北京航空航天大学宁波创新研究院 | Embedded return stroke structure of sloping cam plate and have plunger pump of this structure |
-
2020
- 2020-06-08 CN CN202010513203.6A patent/CN111536011A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796968A (en) * | 2020-12-03 | 2021-05-14 | 北京航空航天大学宁波创新研究院 | Embedded return stroke structure of sloping cam plate and have plunger pump of this structure |
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