CN112796968A - Embedded return stroke structure of sloping cam plate and have plunger pump of this structure - Google Patents
Embedded return stroke structure of sloping cam plate and have plunger pump of this structure Download PDFInfo
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- CN112796968A CN112796968A CN202011415483.3A CN202011415483A CN112796968A CN 112796968 A CN112796968 A CN 112796968A CN 202011415483 A CN202011415483 A CN 202011415483A CN 112796968 A CN112796968 A CN 112796968A
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- plunger
- swash plate
- cylinder body
- chuck
- hole
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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
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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
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention provides an embedded return stroke structure of a swash plate, which comprises a cylinder body, the swash plate, a rotating shaft, a plunger, a chuck and a pressing plate. One side surface of the sliding shoe slides along the sliding surface, and the other side surface of the sliding shoe is abutted against the first side surface of the chuck; the second side of the chuck is abutted to the pressing plate, and the pressing plate is locked on the step. The friction between the sliding shoe and the pressing plate is transferred to the plane friction between the chuck and the pressing plate, the pressing plate is fixed on the swash plate, the other end of the sliding shoe is rotatably connected with the plunger, the plunger and the plunger hole of the cylinder body form reciprocating motion, and the cylinder body is supported by the rotating shaft. When the friction shoe moves, the rotating shaft drives the cylinder body to rotate, and the cylinder body drives the plunger piston to rotate and reciprocate simultaneously due to the inclination angle of the swash plate, so that the sliding shoe moves under the compression of the chuck and the pressure plate to form a good friction surface. The technical effects of reducing clamping stagnation and slowing down the abrasion of the sliding shoes are achieved. Compared with the plunger pump in the prior art, the plunger pump also has the characteristics of reduced number of parts and convenience in installation.
Description
Technical Field
The invention relates to the field of hydraulic pumps or hydraulic motors, in particular to an embedded return stroke structure of a swash plate and a plunger pump with the same.
Background
Plunger pumps are of various types, and can be used as hydraulic pumps and hydraulic motors. The hydraulic motor and the plunger pump work in the same way, and the energy conversion mode is different, namely the hydraulic motor and the plunger pump work in the opposite way. The plunger type hydraulic pump realizes oil absorption and oil discharge by changing the volume of a plunger cavity through reciprocating motion of a plunger in the plunger cavity of a cylinder body, and is one of positive displacement hydraulic pumps. The common plunger pumps are mainly divided into axial plunger type and radial plunger type. The plunger of the axial plunger pump is parallel to the axis of the cylinder body, and the plunger moves along the axial direction; the plungers of the radial plunger pump are perpendicular to the shaft and move in the radial direction.
When the axial plunger pump works, the driving shaft drives the main shaft of the plunger pump, the main shaft drives the cylinder body to rotate, and the cylinder body rotates and drives the plunger positioned in the cylinder body cavity to move. Because the plunger piston is in ball joint with the sliding shoe, the sliding shoe is pressed on the swash plate by the chuck, and the swash plate has a certain inclination angle. Therefore, when the plunger piston does reciprocating motion, the plunger piston cavity is easy to change periodically, so that the cylinder body rotates for a circle to finish oil absorption and oil discharge once. However, when the plunger absorbs oil, the plunger cavity forms negative pressure, and when oil is discharged, high pressure is formed, the two are in an unbalanced state in the axial direction, and the negative pressure cannot make the plunger extend out, so that a structure is needed to be designed to make the plunger stably absorb oil and discharge oil in the reciprocating motion process. The straight-shaft axial plunger pump generally has a plunger return mechanism, and aims to help lift a plunger out of a plunger cavity in the oil absorption process, complete oil absorption work and ensure that a sliding shoe is well attached to a swash plate. However, the current straight shaft plunger pump has the following problems:
1. the structure of the return mechanism is complicated. The existing return mechanism is mainly characterized in that a plunger piston is uniformly clamped by a clamping hole of a chuck, and the chuck can tightly hold the plunger piston through the threaded connection between a fixed support fixed on a swash plate and the chuck.
2. The installation is inconvenient and easy to reveal. At present, a fixed support on the swash plate is in threaded connection with a chuck, uneven stress easily causes eccentric wear of a step surface of a sliding shoe, internal leakage is increased slightly, and the sliding shoe is damaged seriously, so that the performance and the service life of a pump are influenced.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present invention provides an embedded swash plate return stroke structure and a plunger pump having the same, so as to achieve the technical effects of reducing the complexity of a return stroke mechanism and reducing the possibility of leakage. The purpose of the invention is realized by the following scheme:
according to an aspect of an embodiment of the present invention, there is provided an embedded type return stroke structure of a swash plate, including a cylinder block, a swash plate, a rotating shaft, a plunger, a chuck and a pressing plate; the rotating shaft penetrates through a cylinder body through hole of the cylinder body and a through hole in the middle of the swash plate, and the rotating shaft is suitable for driving the cylinder body to rotate around the axis of the rotating shaft; the cylinder body is provided with a plurality of plunger holes parallel to the axis of the rotating shaft, and the plunger holes are uniformly distributed in the cylinder body along the circumference; the swash plate comprises a sliding surface and a circular step, wherein the sliding surface is obliquely arranged with the axis of the through hole in the middle of the swash plate, and the circular step protrudes along the circumferential direction of the sliding surface; one end of the plunger extends into the plunger hole and is suitable for reciprocating motion along the plunger hole, and the other end of the plunger is rotatably connected with the sliding shoe; one side surface of the sliding shoe slides along the sliding surface, and the other side surface of the sliding shoe is abutted against the first side surface of the chuck; the second side of the chuck is abutted to the pressing plate, and the pressing plate is locked on the step.
Further, the sliding surface is nitrided to form a nitrided layer.
Furthermore, a plurality of threaded holes are formed in the step, the pressing plate is annular, the diameter of an inner ring of the pressing plate is smaller than the outer diameter of the chuck, fastener through holes corresponding to the threaded holes are uniformly distributed in the pressing plate, and screws are used for fixing the pressing plate and the swash plate through the fastener through holes and the threaded holes.
Furthermore, a plurality of slipper limiting holes are formed in the chuck, and each slipper comprises a circular truncated cone abutted against the sliding surface and a plunger mounting seat positioned in the middle of the circular truncated cone and used for being in rotary connection with the plunger; the diameter of the round platform is larger than that of the slipper limiting hole, the outer diameter of the plunger mounting seat is smaller than that of the slipper limiting hole, and the plunger mounting seat is suitable for entering the slipper limiting hole.
Furthermore, a spherical groove is formed in the plunger mounting seat, and the spherical center of the spherical groove is located in the spherical groove; one end of the plunger comprises a spherical plunger head, and the plunger head is suitable for entering the interior of the spherical groove and is limited to be separated from the spherical groove by the spherical groove.
Further, the through-hole in the middle part of the cylinder body is provided with a spline groove, the rotating shaft is provided with a spline which is arranged and connected with the spline groove in a clamping manner.
Further, the chuck is located in the inner cavity of the step, and the surface of the chuck facing the cylinder is not higher than the surface of the step.
Further, the bottom of the plunger hole of the cylinder body is provided with an oil hole communicated with the outside.
Furthermore, a first guide groove is formed in the middle of the plunger in a penetrating mode; and a second guide groove which penetrates through the middle part of the sliding shoe is arranged.
According to another aspect of the embodiments of the present invention, there is provided a plunger pump including the swash plate in-line return stroke structure described above, and either end of the rotary shaft is adapted to be connected to a driving motor.
Compared with the prior art, the invention has the advantages that: the invention provides an embedded return stroke structure of a swash plate, which comprises a cylinder body, the swash plate, a rotating shaft, a plunger, a chuck and a pressing plate. One side surface of the sliding shoe slides along the sliding surface, and the other side surface of the sliding shoe is abutted against the first side surface of the chuck; the second side of the chuck is abutted to the pressing plate, and the pressing plate is locked on the step. The friction between the sliding shoe and the pressing plate is transferred to the plane friction between the chuck and the pressing plate, the pressing plate is fixed on the swash plate, the other end of the sliding shoe is rotatably connected with the plunger, the plunger and the plunger hole of the cylinder body form reciprocating motion, and the cylinder body is supported by the rotating shaft. When the friction shoe moves, the rotating shaft drives the cylinder body to rotate, and the cylinder body drives the plunger piston to rotate and reciprocate simultaneously due to the inclination angle of the swash plate, so that the sliding shoe moves under the compression of the chuck and the pressure plate to form a good friction surface. The technical effects of reducing clamping stagnation and slowing down the abrasion of the sliding shoes are achieved. Compared with the plunger pump in the prior art, the plunger pump also has the characteristics of reduced number of parts and convenience in installation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the principles of the invention.
FIG. 1 is a general schematic view of an embedded return stroke structure of a swash plate according to the present invention;
FIG. 2 is a schematic view showing the relationship between the cylinder and the rotating shaft of the swash plate embedded return stroke structure of FIG. 1;
FIG. 3 is a schematic view showing the relationship between the shoe, the chuck and the platen of the swash plate embedded return stroke structure of FIG. 1;
FIG. 4 is a schematic illustration of the swash plate of the unit of FIG. 1;
FIG. 5 is a schematic sectional view of the swash plate embedded return stroke structure of FIG. 1 along the axis of the rotating shaft;
FIG. 6 is an enlarged schematic view at A in FIG. 5;
FIG. 7 is a schematic view of the component shoe of FIG. 6.
Wherein: 1. a cylinder body; 11. a cylinder body through hole; 12. a plunger hole; 13. a spline groove; 14. an oil hole; 2. a swash plate; 21. a sliding surface; 22. a step; 23. a threaded hole; 3. a rotating shaft; 31. a spline; 4. a plunger; 41. a plunger head; 5. pressing a plate; 6. a screw; 7. a slipper; 71. a circular truncated cone; 72. a plunger mounting seat; 8. a chuck; 9. and a nitride layer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1 and 5, the invention provides an embedded type return stroke structure of a swash plate, which comprises a cylinder body 1, a swash plate 2, a rotating shaft 3, a plunger 4, a chuck 8 and a pressing plate 5.
Wherein the rotating shaft 3 penetrates through the cylinder through hole 11 of the cylinder block 1 and the middle through hole of the swash plate 2. Specifically, the cylinder block 1 and the swash plate 2 are integrally formed as a rotary body. A cylinder through hole 11 is provided along the axial direction of the cylinder block 1, and a through hole is also provided in the axial direction of the swash plate 2 so that the rotary shaft 3 can penetrate through the two through holes. Two ends of the rotating shaft 3 are exposed outside the plunger pump body, two ends of the rotating shaft 3 can be arranged on end covers at two ends of the plunger pump through bearings, and any one end of the rotating shaft can be connected with the driving motor to serve as an input end of the plunger pump.
Referring to fig. 2, the rotating shaft 3 is in a stepped shaft form, two end portions of the rotating shaft 3 have a smaller diameter than the middle portion of the rotating shaft 3, the two end portions of the rotating shaft 3 are used for being connected with a driving motor, the middle portion having a larger diameter is provided with an external spline 31, and a spline groove 13 is formed in a cylinder body through hole 11 in the middle portion of the cylinder body 1. The spline 31 of the rotating shaft 3 is matched with the spline groove 13, so that the rotating shaft 3 can drive the cylinder body 1 to rotate. In a preferred technical scheme, the spline 31 is an arc spline, so that the rotating shaft 3 has an automatic alignment function, and the cylinder body 1 is not easy to topple.
Referring to the attached drawings 2-4, the cylinder body 1 is provided with a plurality of plunger holes 12 parallel to the axis of the rotating shaft 3, and the plunger holes 12 are uniformly distributed on the cylinder body 1 along the circumference. The swash plate 2 comprises a sliding surface 21 obliquely arranged with the axis of the through hole in the middle of the swash plate 2 and a circular step 22 protruding along the circumferential direction of the sliding surface 21. One end of the plunger 4 extends into the plunger hole 12 and is suitable for reciprocating along the plunger hole 12, and the other end of the plunger 4 is rotatably connected with the sliding shoe 7. One side surface of the shoe 7 slides along the sliding surface 21, and the other side surface abuts against the first side surface of the chuck 8; the second side of the chuck 8 abuts against the pressure plate 5, and the pressure plate 5 is locked on the step 22. Therefore, the friction between the sliding shoe 7 and the pressure plate 5 is transferred to the plane friction between the chuck 8 and the pressure plate 5, the pressure plate 5 is fixed on the swash plate 2, the other end of the sliding shoe 7 is rotatably connected with the plunger 4, the plunger 4 and the plunger hole 12 of the cylinder block 1 form reciprocating motion, and the cylinder block 1 is supported by the rotating shaft 3. When in motion, the rotating shaft 3 drives the cylinder body 1 to rotate, and the swash plate 2 has an inclination angle, so that the cylinder body 1 drives the plunger 4 to rotate and reciprocate simultaneously, the sliding shoe 7 moves under the compression of the chuck 8 and the pressure plate 5 to form a good friction surface, and the technical effects of reducing clamping stagnation and slowing down the abrasion of the sliding shoe 7 are achieved. Compared with the plunger pump in the prior art, the plunger pump also has the characteristics of reduced number of parts and convenience in installation.
The cylinder body 1 is provided with a plurality of oil holes 14, and the oil holes 14 are communicated with the plunger holes 12. The oil hole 14 can be disposed on any side surface of the cylinder block 1. In a preferred scheme, the oil hole 14 is arranged at the bottom of the plunger hole 12 of the cylinder body 1, so that the inner space of the plunger hole 12 is effectively utilized, and the plunger 4 can pump all oil in the plunger hole 12 out of the plunger hole 12.
Referring to fig. 4 to 6, the sliding surface 21 is inclined with respect to the axis of the swash plate 2, and when the swash plate 2 is assembled with the rotary shaft 3, the swash plate 2 is inclined with respect to the axis of the rotary shaft 3. The step 22 is of uniform thickness so that the step 22 is also inclined with respect to the axis of the shaft 3. The step 22 of the swash plate 2 is provided with a plurality of threaded holes 23. The pressure plate 5 is in a circular ring shape, the space of the inner ring of the pressure plate 5 is suitable for the plunger 4 to pass through, and the plunger 4 rotates in the space limited by the inner ring of the pressure plate 5. The diameter of the inner ring of the pressing plate 5 is smaller than the outer diameter of the chuck 8, so that the pressing plate 5 can limit the direction of the clamping plate to the cylinder body 1, and the clamping plate is fixed in a step groove limited by the pressing plate 5 and a boss of the swash plate 2. Fastener through holes corresponding to the threaded holes 23 are uniformly distributed in the pressing plate 5, and screws are used for fixing the pressing plate 5 and the swash plate 2 through the fastener through holes and the threaded holes 23.
The pressure plate 5 may be made as a grooved pressure plate 5 in order to increase the space between the swash plate 2 and the pressure plate 5 for mounting the slipper 7 and the chuck 8. Of course, it is also possible to increase the height of the step 22 (as shown in fig. 6), so that the surface of the chuck 8 facing the cylinder block 1 is not higher than the surface of the step 22, and both sides of the surface are flat, and the pressure plate 5 is closely attached to the surface of the step 22.
Referring to fig. 6 to 7, the slipper 7 includes a circular truncated cone 71 abutting against the sliding surface 21, and a plunger mounting seat 72 located in the middle of the circular truncated cone 71 and used for being rotatably connected with the plunger 4. The plunger 4 and the sliding surface 21 have large contact force, and the circular truncated cone 71 with certain thickness can ensure the stable structure of the circular truncated cone 71.
The chuck 8 is also in the shape of a circular ring, the middle part of the chuck 8 is suitable for penetrating through the rotating shaft 3, and the circular ring of the chuck 8 corresponds to the position of the plunger 4. A plurality of sliding shoe limiting holes are formed in the circular ring of the chuck 8. The plunger 4 can pass through the sliding shoe limiting hole to be connected with the sliding shoe 7. In order to press the shoe 7 against the sliding surface 21 by the chuck 8, the diameter of the circular truncated cone 71 of the shoe 7 is larger than the diameter of the shoe stopper hole, so that the circular ring solid portion of the chuck 8 can abut against the outer edge of the circular truncated cone 71.
Further, the upper portion of the circular truncated cone 71 of the slipper 7 further includes a plunger mounting seat 72. When the boss 71 has a sufficient thickness, the plunger mount 72 may be diametrically embedded in the boss 71. The plunger 4 rod forms a rotary connection in the middle of the circular table 71. However, in this case, the shoe 7 and the chuck 8 do not have a limit at the engagement surface of the chuck 8, and the shoe 7 can move to any position along the contact surface between the chuck 8 and the shoe 7. After the plunger 4 is connected with the sliding shoe 7, the surface of the plunger 4 and the wall surface of the sliding shoe limiting hole are substantially used for forming limitation, and the sliding shoe is prevented from separating from an allowable sliding interval. This design may result in motion seizure, wear on both the shoe 7 and the plunger 4. Therefore, in the preferred embodiment herein, the plunger mounting seat 72 protrudes from the circular truncated cone 71, so that on one hand, the mass of the slipper 7 can be effectively reduced, and on the other hand, the mounting portion protruding from the circular truncated cone 71 actually plays a role in limiting. The mounting portion passes through the shoe retaining hole, so that the moving space of the shoe 7 with respect to the swash plate 2 is also effectively restricted. And because the outer wall surface of the plunger mounting seat 72 of the sliding shoe can be well attached to the sliding shoe limiting hole, the sliding shoe limiting hole bears stable and uniform pressure, and the service life of the structure is prolonged.
The plunger mount 72 can be hinged or gimbaled to the plunger 4. In the preferred embodiment of the present invention, the plunger mounting seat 72 is provided with a spherical recess therein. The spherical center of the spherical groove is positioned inside the spherical groove. Specifically, the shoe 7 is cut along the axis of the shoe 7 to form a cross section (since the shoe 7 is a solid of revolution, any cross section along the axis of the shoe 7 is uniform in shape), and the cross section of the spherical groove is an arc, which is a major arc. The top of the spherical groove is a circular opening. One end of the plunger 4 comprises a spherical plunger head 41, the diameter of the spherical plunger head 41 should be larger than the diameter of the circular opening at the top of the spherical recess, while the diameter of the plunger head 41 is smaller than the diameter of the spherical recess. During assembly, the plunger head 41 is inserted into the spherical recess using a certain pressing force and using deformation of the material, so that the plunger head 41 is adapted to rotate inside the spherical recess but is confined therein. During the return stroke of the plunger 4 (the process of the plunger 4 driving the hydraulic oil to be ejected from the oil hole 14 is referred to as the process, and the process of the plunger 4 driving the hydraulic oil to be sucked from the oil hole 14 is referred to as the return stroke), the sliding surface 21 of the swash plate 2 cannot provide the return stroke acting force to the plunger, so that the spherical groove can pull the plunger 4 to move outwards from the plunger hole 12.
In a preferred embodiment, the sliding surface 21 is nitrided to form a nitrided layer 9, which increases the hardness and makes the sliding surface 21 more wear resistant.
In another preferred technical scheme, a first guide groove is formed in the middle of the plunger 4 in a penetrating mode; and a second guide groove which penetrates through the middle part of the sliding shoe 7 is arranged. The first guide groove communicates with the plunger hole 12, and guides part of the oil to the second guide groove through the first guide groove, thereby lubricating the contact surface between the shoe 7 and the sliding surface 21.
According to another aspect of the embodiments of the present invention, there is provided a plunger pump having a swash plate built-in return stroke structure, and either end of the rotary shaft 3 is adapted to be connected to a driving motor.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of description and are not intended to limit the scope of the invention. Other variations or modifications will occur to those skilled in the art based on the foregoing disclosure and are within the scope of the invention.
Claims (10)
1. The utility model provides an embedded return stroke structure of sloping cam plate, includes cylinder body, sloping cam plate, pivot and plunger, its characterized in that: the device also comprises a chuck and a pressure plate;
the rotating shaft penetrates through a cylinder body through hole of the cylinder body and a through hole in the middle of the swash plate, and the rotating shaft is suitable for driving the cylinder body to rotate around the axis of the rotating shaft;
the cylinder body is provided with a plurality of plunger holes parallel to the axis of the rotating shaft, and the plunger holes are uniformly distributed in the cylinder body along the circumference;
the swash plate comprises a sliding surface and a circular step, wherein the sliding surface is obliquely arranged with the axis of the through hole in the middle of the swash plate, and the circular step protrudes along the circumferential direction of the sliding surface;
one end of the plunger extends into the plunger hole and is suitable for reciprocating motion along the plunger hole, and the other end of the plunger is rotatably connected with the sliding shoe;
one side surface of the sliding shoe slides along the sliding surface, and the other side surface of the sliding shoe is abutted against the first side surface of the chuck; the second side of the chuck is abutted to the pressing plate, and the pressing plate is locked on the step.
2. The swash plate embedded return stroke structure as claimed in claim 1, wherein: the sliding surface is nitrided to form a nitride layer.
3. The swash plate embedded type return stroke structure of claim 1, wherein: the step is provided with a plurality of threaded holes, the pressing plate is annular, the diameter of the inner ring of the pressing plate is smaller than the outer diameter of the chuck, fastener through holes corresponding to the threaded holes are uniformly distributed in the pressing plate, and screws pass through the fastener through holes and the threaded holes to fix the pressing plate and the swash plate.
4. The swash plate embedded return stroke structure as claimed in claim 1, wherein: the chuck is provided with a plurality of slipper limiting holes, and each slipper comprises a circular truncated cone abutted against the sliding surface and a plunger mounting seat positioned in the middle of the circular truncated cone and used for being in rotary connection with the plunger; the diameter of the round platform is larger than that of the slipper limiting hole, the outer diameter of the plunger mounting seat is smaller than that of the slipper limiting hole, and the plunger mounting seat is suitable for entering the slipper limiting hole.
5. The swash plate embedded return stroke structure as claimed in claim 4, wherein: a spherical groove is formed in the plunger mounting seat, and the spherical center of the spherical groove is located in the spherical groove; one end of the plunger comprises a spherical plunger head, and the plunger head is suitable for entering the interior of the spherical groove and is limited to be separated from the spherical groove by the spherical groove.
6. The swash plate embedded return stroke structure as claimed in claim 1, wherein: the through-hole at cylinder body middle part is provided with the spline groove, the pivot be equipped with locate with the spline groove joint's spline.
7. The swash plate embedded return stroke structure as claimed in claim 1, wherein: the chuck is located in the internal cavity of the step, and the surface of the chuck facing the cylinder body is not higher than the surface of the step.
8. The swash plate embedded return stroke structure as claimed in claim 1, wherein: and an oil hole communicated with the outside is formed in the bottom of the plunger hole of the cylinder body.
9. The swash plate embedded return stroke structure as claimed in claim 1, wherein: the middle part of the plunger is provided with a first guide groove which penetrates through the plunger; and a second guide groove which penetrates through the middle part of the sliding shoe is arranged.
10. A plunger pump, characterized by: the swash plate embedded return stroke structure of any one of claims 1 to 9, wherein either end of the rotating shaft is adapted to be connected to a driving motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011415483.3A CN112796968A (en) | 2020-12-03 | 2020-12-03 | Embedded return stroke structure of sloping cam plate and have plunger pump of this structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011415483.3A CN112796968A (en) | 2020-12-03 | 2020-12-03 | Embedded return stroke structure of sloping cam plate and have plunger pump of this structure |
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| CN112796968A true CN112796968A (en) | 2021-05-14 |
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| CN202011415483.3A Pending CN112796968A (en) | 2020-12-03 | 2020-12-03 | Embedded return stroke structure of sloping cam plate and have plunger pump of this structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114367941A (en) * | 2021-07-16 | 2022-04-19 | 日照朝力信息科技有限公司 | Assembling device and assembling process of plunger pump |
| CN114576123A (en) * | 2021-12-24 | 2022-06-03 | 石家庄铁道大学 | Oblique shaft type axial plunger pump |
| CN114576124A (en) * | 2021-12-24 | 2022-06-03 | 石家庄铁道大学 | Cardan driven oblique axis type plunger pump |
| CN115234461A (en) * | 2022-07-22 | 2022-10-25 | 中航力源液压股份有限公司 | Gear disc and spherical hinge antifriction mechanism of aviation hydraulic pump |
| CN115306665A (en) * | 2022-07-29 | 2022-11-08 | 北京精密机电控制设备研究所 | Spherical floating flow distribution type high-rotation-speed servo motor pump |
| CN116398416A (en) * | 2023-03-28 | 2023-07-07 | 浙江大学 | Plunger pair performance simulation test device, temperature control system and hydraulic system |
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| CN114367941A (en) * | 2021-07-16 | 2022-04-19 | 日照朝力信息科技有限公司 | Assembling device and assembling process of plunger pump |
| CN114576123A (en) * | 2021-12-24 | 2022-06-03 | 石家庄铁道大学 | Oblique shaft type axial plunger pump |
| CN114576124A (en) * | 2021-12-24 | 2022-06-03 | 石家庄铁道大学 | Cardan driven oblique axis type plunger pump |
| CN115234461A (en) * | 2022-07-22 | 2022-10-25 | 中航力源液压股份有限公司 | Gear disc and spherical hinge antifriction mechanism of aviation hydraulic pump |
| CN115234461B (en) * | 2022-07-22 | 2023-11-24 | 中航力源液压股份有限公司 | Gear disc and spherical hinge antifriction mechanism of aviation hydraulic pump |
| CN115306665A (en) * | 2022-07-29 | 2022-11-08 | 北京精密机电控制设备研究所 | Spherical floating flow distribution type high-rotation-speed servo motor pump |
| CN116398416A (en) * | 2023-03-28 | 2023-07-07 | 浙江大学 | Plunger pair performance simulation test device, temperature control system and hydraulic system |
| CN116398416B (en) * | 2023-03-28 | 2024-01-30 | 浙江大学 | Plunger pair performance simulation test device, temperature control system and hydraulic system |
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Application publication date: 20210514 |