CN117846912A - Discrete cylinder block valve flow distribution type swash plate plunger pump - Google Patents
Discrete cylinder block valve flow distribution type swash plate plunger pump Download PDFInfo
- Publication number
- CN117846912A CN117846912A CN202410083958.5A CN202410083958A CN117846912A CN 117846912 A CN117846912 A CN 117846912A CN 202410083958 A CN202410083958 A CN 202410083958A CN 117846912 A CN117846912 A CN 117846912A
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- Prior art keywords
- plunger
- swash plate
- disc
- cylinder body
- floating
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- 238000007789 sealing Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims 1
- 230000002706 hydrostatic effect Effects 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
The invention discloses a discrete cylinder valve flow distribution type swash plate plunger pump, and belongs to the technical field of plunger pumps; the plunger pump adopts the design of a discretization cylinder body to discretize the cylinder body into a plurality of discretization cylinder bodies; the device comprises a discretization cylinder body and a fine plunger which are matched and inserted, wherein the discretization cylinder body and the fine plunger both comprise a plunger rod and a plunger ball head which are connected, and the plunger rod of the fine plunger can be inserted into the plunger rod of the discretization cylinder body; the cylinder body is discretized through the double-plunger structure, so that the lateral force between the cylinder body and the plunger of the axial plunger pump is eliminated, the stability of an oil film is improved, the rotating speed range is widened, the ultrahigh-pressure working performance of the device can be remarkably improved, and the stability of the device under different working environments is improved; the plunger pump adopts the structure of the bevel gear of the floating pressure disk, so that the stress condition of the plungers can be optimized, and the lateral force between the plungers of the cylinder body is avoided. The plunger pump adopts a floating disc structure, optimizes the stress between the sliding shoes and the swash plate, and optimizes the friction and abrasion between the sliding shoes and the swash plate.
Description
Technical Field
The invention relates to the technical field of plunger pumps, in particular to a discrete cylinder valve flow distribution type swash plate plunger pump.
Background
The axial plunger pump is widely applied to a hydraulic system due to the simple and compact structure. However, due to the limitation of the main structure of the existing plunger pump, the requirements of ultrahigh pressure, high rotating speed and wide rotating speed range cannot be met, and the friction pair is extremely easy to damage, so that the overall performance and the service life of the pump are affected. The plunger pair is a core friction pair in the pump, and because the plunger pair bears a great lateral force of fluctuation, the plunger pair is worn and leaked under low-speed high-pressure, and the working performance of the pump is severely restricted. And the traditional plunger pump cannot realize operation in a wide rotating speed range due to the fact that the moment of inertia of the rotating assembly is large, an oil film of the plunger cylinder body is unstable and the like. Therefore, the structure of the friction pair of the plunger pump is optimized, and the working performance of the plunger pump can be improved to a certain extent.
Disclosure of Invention
The invention provides a discrete cylinder valve flow distribution type swash plate plunger pump, which adopts a double plunger design to discretize a cylinder and optimize the stress condition of the plunger; the design of a discrete cylinder valve distribution swash plate is adopted, so that the moment of inertia is reduced, and the contact stability is improved; adopting a floating disc design to optimize the friction characteristics between friction pairs; the bevel gear and the central spherical hinge are adopted to provide a limiting function for the floating disc assembly, so that the lateral force born by the plunger set is reduced; the valve is adopted for distributing flow, so that friction is reduced, and oil absorption capacity of the pump is improved.
In order to achieve the above purpose, the invention provides a double-plunger structure, which comprises a discretized cylinder body and a fine plunger which are matched and inserted, wherein the discretized cylinder body and the fine plunger both comprise a plunger rod and a plunger ball head which are connected, and the plunger rod of the fine plunger can be inserted into the plunger rod of the discretized cylinder body.
Preferably, an annular static pressure supporting belt is arranged on the plunger ball head.
The invention also provides a swash plate plunger pump driving mechanism applying the double-plunger structure, which comprises a swash plate, a floating disc, a movable floating pressure disc and a fixed floating pressure disc which are sequentially arranged, wherein the swash plate is in driving connection with a main shaft, the swash plate is provided with an inclined mounting surface, the floating disc is mounted on the inclined mounting surface and is fixedly connected with the movable floating pressure disc, the floating disc and the movable floating pressure disc are both hinged with the ball head of the fine plunger, a sealing round groove matched with the ball head of the fine plunger is formed in the connecting surface of the floating disc and the movable floating pressure disc, and the movable floating pressure disc is in real-time fit with the inclined mounting surface of the swash plate;
the fixed floating pressure plate is in a vertical state and hinged with the discretization cylinder body, and the thin plunger can reciprocate along the axis of the discretization cylinder body;
the fixed floating pressure plate is movably connected with the movable floating pressure plate through a central spherical hinge, and the spherical center of the central spherical hinge is positioned on the rotating shaft line of the main shaft.
Preferably, the fixed floating pressure plate and the movable floating pressure plate are respectively provided with an engageable bevel gear.
Preferably, the thin plungers are uniformly distributed in a ring shape along the centers of the floating disc and the movable floating pressure disc; the discretization cylinder body is uniformly distributed in a ring shape along the centers of the flow distribution end cover and the fixed floating pressure disk.
The invention also provides a discrete cylinder block valve flow distribution type swash plate plunger pump applying the swash plate plunger pump driving mechanism, which comprises a shell, a flow distribution end cover and a rear end cover which are fixedly connected, wherein an installation space is formed in the shell, a swash plate, a floating disc, a movable floating pressure disc and a fixed floating pressure disc are sequentially installed in the installation space, the swash plate is in driving connection with a main shaft, and the main shaft and the swash plate are both in rotational connection with the shell;
the flow distribution end cover is provided with a vertical mounting surface, a fixed floating pressure plate is coaxially arranged on the vertical mounting surface, the flow distribution end cover and the fixed floating pressure plate are both hinged with a ball head of the discretization cylinder body, and a sealing round groove matched with the ball head of the discretization cylinder body is formed in the connecting surface of the flow distribution end cover and the fixed floating pressure plate;
the flow distribution end cover is provided with a one-way valve and a plug, the one-way valve is arranged at an oil inlet and an oil outlet of the flow distribution end cover, and the plug separates the high-pressure oil cavity from the low-pressure oil cavity.
Preferably, a wear-resistant disc is arranged between the swash plate and the shell, and the wear-resistant disc is connected with the shell through a locating pin.
Preferably, the swash plate comprises a cylinder section and an inclined section which are connected, the cylinder section is coaxially connected with the main shaft through a spline and is axially positioned by a retainer ring, and the outer circle of the cylinder section is rotationally connected with the shell through a sliding bearing.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the design of the double plungers, the cylinder body is discretized, the stress condition of the plungers is optimized, the pressure level can be improved, the stability of an oil film can be improved, and the rotating speed range can be widened; the lateral force between the axial plunger pump cylinder body and the plunger is eliminated through the double-plunger structure, the stress limit on the axial plunger pump structure widely applied at present is broken through, the ultrahigh pressure working performance of the device can be remarkably improved, and the stability of the device under different working environments is improved. The double plunger structure not only avoids the lateral force between the plungers of the cylinder body, but also reduces the friction force born by the double plunger during the matching, and avoids the unstable and leakage of an oil film caused by overlong contact length and linear seal between the plunger cylinder bodies.
2. The thin plunger is designed for deformation compensation, so that the fit clearance of the plunger during ultrahigh-pressure operation can be ensured, the sealing and lubricating performances of a plunger cavity are ensured, and the efficiency of the pump is improved.
3. According to the invention, the plunger ball head is provided with the sealing belt, so that the stress of the plunger ball head during rotation is optimized, and the pressure level can be improved.
4. The structure of the swash plate and the floating plate is adopted in the invention, so that the rotating speed range and the pressure level can be improved; the swash plate structure reduces rotational inertia, the friction pair formed by the floating disc and the swash plate is more stable than the sliding shoe pair in oil film, the risk of friction and abrasion is reduced, and the reliability of the pump is improved.
5. The invention adopts the central spherical hinge and the bevel gear to limit the freedom degree of the floating disc, has high tooth surface bearing capacity, can bear larger lateral force, can be suitable for super-high pressure working conditions, can improve the working stability, reduces the vibration during working and improves the power density ratio.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a discrete cylinder valve split-flow swash plate plunger pump provided by the invention;
FIG. 2 is a schematic diagram of the internal structure of a discrete cylinder valve split-flow swash plate plunger pump according to the present invention;
FIG. 3 is a schematic diagram of the overall structure of a drive mechanism for a discrete cylinder valve split-flow swash plate plunger pump provided by the invention;
FIG. 4 is a schematic view of a floating disc assembly according to the present invention;
fig. 5 is a schematic diagram of a plunger set with a sealing band on a plunger ball head according to the present invention.
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.
As shown in fig. 1 to 5, the discrete cylinder valve split-flow swash plate plunger pump provided in the present embodiment includes a housing assembly, a main shaft 2, a swash plate 5, a floating disc assembly, a center spherical hinge 9, a split-flow end cover assembly, and a rear end cover 15; the floating disc assembly is tightly attached to the swash plate 5 under the action of the central spherical hinge 9, the main shaft 2 drives the swash plate 5 to rotate, so that the floating disc assembly is driven to do radial sliding motion on the surface of the swash plate 5, the reciprocating linear motion of the plunger is realized, the volume of a working cavity of the plunger is caused to change, and the low-pressure and high-pressure distributing valves which are respectively communicated with the oil inlet and the oil outlet are matched on the distributing end cover assembly, so that the oil suction and the oil pressing work of the pump are realized.
The housing assembly comprises a housing 1, a wear-resistant disc 3 and a sliding bearing 4, wherein the wear-resistant disc 3 is connected with the housing 1 through a locating pin. The main shaft 2 is connected with the shell 1 through a bearing; the axial positioning is carried out by a check ring through the fixed connection of the spline and the sloping cam plate 5; the excircle of the swash plate 5 is supported by a sliding bearing 4; the main shaft 2 drives the swash plate 5 to rotate, the floating disc assembly is kept attached to the swash plate 5, and the floating disc assembly can do plane rotation movement on the swash plate 5; the floating disc assembly spatially oscillates about the central spherical hinge and rotates relative to the swash plate.
The floating disc assembly comprises a floating disc 6, a movable floating pressure disc 7 and a thin plunger 8, wherein the floating disc 6 is fixedly connected with the movable floating pressure disc 7, and a sealing circular groove matched with a ball head of the thin plunger 8 is formed in the floating disc 6 and the movable floating pressure disc 7; the ball head of the thin plunger 8 is hinged between the floating disc 6 and the movable floating pressure disc 7, is uniformly distributed in a ring shape along the centers of the floating disc 6 and the movable floating pressure disc 7, and can freely rotate.
The distributing end cover assembly comprises a distributing end cover 12, a fixed floating pressure plate 11, a discretization cylinder body 10, a one-way valve 14 and a plug 13. The fixed floating pressure plate 11 is fixedly connected with the flow distribution end cover 12, and sealing circular grooves matched with the ball heads of the discretization cylinder body 10 are formed in the flow distribution end cover 12 and the fixed floating pressure plate 11. The discretization cylinder body 10 is hinged between the fixed floating pressure plate 13 and the flow distribution end cover 15, is uniformly distributed in a ring shape along the center of the flow distribution end cover 15 and the fixed floating pressure plate 13, and can rotate freely. The thin plunger 8 is inserted into the discretization cylinder body 10 and can reciprocate along the axis of the discretization cylinder body 10; a one-way valve 14 is arranged at the outlet of an oil inlet and outlet of the flow distribution end cover, and a plug 13 separates the high-pressure oil cavity from the low-pressure oil cavity.
The central spherical hinge 9 is clamped between the fixed floating pressure plate 11 and the movable floating pressure plate 8 and is movably connected, the supporting floating disc assembly rotates around the surface of the central spherical hinge 9 and deflects rightwards under the action of the sloping cam plate, so that the two bevel gears are meshed with each other, the floating disc assembly rotates along the surface of the central spherical hinge and deflects rightwards under the action of the sloping cam plate until the two bevel gears are meshed with each other.
The rear end cover 15 is fixedly connected with the shell 1 and the distributing end cover 12.
In the scheme, a floating disc assembly is adopted to replace a sliding shoe plunger assembly. The floating disc assembly is matched with the end face of the sloping cam plate, the sloping cam plate drives the floating disc to deflect rightwards through the inclined plane on the sloping cam plate until the two bevel gears are meshed with each other, so that limit is realized, the bevel gears are driven, and the plunger is driven to reciprocate; the sliding shoes are eliminated, and the circumferential revolution relative movement between a plurality of sliding shoes and a swash plate of the traditional plunger pump is changed into radial sliding movement between a floating disc and the swash plate; when the swash plate rotates, the inclined plane on the swash plate pushes the floating disc to move along the right direction until the two bevel gears are mutually abutted, and then limiting is achieved, namely the floating disc and the swash plate are always in a compressed state. Adopting a bevel gear and a central spherical hinge design; the floating disc assembly is provided with a limiting function, and the floating disc and the sloping cam plate are always in a compressed state. Adopting a double-plunger design; the cylinder body of the traditional plunger pump is discretized, the cylinder body in the plunger pump is eliminated, the lateral force is eliminated, and the stress condition of the plunger is optimized. The ball head of the plunger is provided with a sealing belt; the plunger ball head is matched with a sealing circular groove formed in the floating disc and the movable floating pressure disc, and an annular static pressure supporting belt is arranged on the plunger ball head. The thin plunger is designed for deformation compensation, so that the fit clearance of the plunger in the ultra-high pressure working process can be ensured, the sealing and lubricating performances of a plunger cavity are ensured, and the efficiency of the pump is improved. The inner cavity of the thin plunger is communicated with the static pressure supporting belt at the bottom of the floating disc and is communicated with the inner cavity of the sloping cam plate and the static pressure supporting belt, so that the static pressure supporting between the sloping cam plate and the sliding bearing is realized. A valve flow distribution mode is adopted; the inner cavity of the discretization cylinder body is directly communicated with the inner cavity of the distributing end cover, and the oil duct of the inner cavity of the distributing end cover is divided into a high-pressure oil inlet and a low-pressure oil outlet, so that the distributing oil duct and the structure thereof are simplified, and high-pressure and low-pressure distribution is realized.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.
Claims (8)
1. The utility model provides a double-plunger structure, its characterized in that, including discretization cylinder body and the thin plunger of cooperation grafting, discretization cylinder body with the thin plunger all includes plunger rod and the plunger bulb that is connected, the plunger chamber has been seted up on the plunger rod of discretization cylinder body, the plunger rod of thin plunger can insert the plunger intracavity, but plunger bulb swing joint is on the floating disc.
2. The dual plunger structure of claim 1, wherein the plunger ball is provided with an annular hydrostatic support band.
3. The swash plate plunger pump driving mechanism with the double-plunger structure according to claim 1 or 2 is characterized by comprising a swash plate, a floating disc, a movable floating pressure disc and a fixed floating pressure disc which are sequentially arranged, wherein the swash plate is in driving connection with a main shaft, the swash plate is provided with an inclined mounting surface, the floating disc is mounted on the inclined mounting surface, the floating disc is fixedly connected with the movable floating pressure disc, the floating disc and the movable floating pressure disc are both hinged with a ball head of a thin plunger, a sealing circular groove matched with the ball head of the thin plunger is formed in a connecting surface of the floating disc and the movable floating pressure disc, and the movable floating pressure disc is in real-time fit with the inclined mounting surface of the swash plate;
the fixed floating pressure plate is in a vertical state and hinged with the discretization cylinder body, and the thin plunger can reciprocate along the axis of the discretization cylinder body;
the fixed floating pressure plate is movably connected with the movable floating pressure plate through a central spherical hinge, and the spherical center of the central spherical hinge is positioned on the rotating shaft line of the main shaft.
4. A swash plate plunger pump driving mechanism as claimed in claim 3, wherein the fixed floating pressure plate and the movable floating pressure plate are provided with respectively engageable bevel gears.
5. The swash plate plunger pump drive mechanism of claim 4, wherein the fine plungers are evenly annularly distributed along the centers of the floating disc and the movable floating platen; the discretization cylinder body is uniformly distributed in a ring shape along the centers of the flow distribution end cover and the fixed floating pressure disk.
6. A discrete cylinder valve flow distribution type swash plate plunger pump using the swash plate plunger pump driving mechanism according to claim 4 or 5, which is characterized by comprising a shell, a flow distribution end cover and a rear end cover which are fixedly connected, wherein an installation space is formed in the shell, a swash plate, a floating disc, a movable floating pressure disc and a fixed floating pressure disc are sequentially installed in the installation space, the swash plate is in driving connection with a main shaft, and the main shaft and the swash plate are both in rotational connection with the shell;
the flow distribution end cover is provided with a vertical mounting surface, a fixed floating pressure plate is coaxially arranged on the vertical mounting surface, the flow distribution end cover and the fixed floating pressure plate are both hinged with a plunger ball head of the discretization cylinder body, and a sealing round groove matched with the plunger ball head of the discretization cylinder body is formed in the connecting surface of the flow distribution end cover and the fixed floating pressure plate;
the flow distribution end cover is provided with a one-way valve and a plug, the one-way valve is arranged at an oil inlet and an oil outlet of the flow distribution end cover, and the plug separates the high-pressure oil cavity from the low-pressure oil cavity.
7. The discrete cylinder valve split swash plate plunger pump of claim 6, wherein: and a wear-resistant disc is arranged between the swash plate and the shell, and the wear-resistant disc is connected with the shell through a locating pin.
8. The discrete cylinder valve split swash plate plunger pump of claim 6, wherein: the swash plate comprises a cylinder section and an inclined section which are connected, the cylinder section is coaxially connected with the main shaft through a spline and is axially positioned by a retainer ring, and the outer circle of the cylinder section is rotationally connected with the shell through a sliding bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410083958.5A CN117846912A (en) | 2024-01-19 | 2024-01-19 | Discrete cylinder block valve flow distribution type swash plate plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410083958.5A CN117846912A (en) | 2024-01-19 | 2024-01-19 | Discrete cylinder block valve flow distribution type swash plate plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117846912A true CN117846912A (en) | 2024-04-09 |
Family
ID=90536999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410083958.5A Pending CN117846912A (en) | 2024-01-19 | 2024-01-19 | Discrete cylinder block valve flow distribution type swash plate plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117846912A (en) |
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2024
- 2024-01-19 CN CN202410083958.5A patent/CN117846912A/en active Pending
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