CN218030479U - Plunger pump - Google Patents
Plunger pump Download PDFInfo
- Publication number
- CN218030479U CN218030479U CN202221524259.2U CN202221524259U CN218030479U CN 218030479 U CN218030479 U CN 218030479U CN 202221524259 U CN202221524259 U CN 202221524259U CN 218030479 U CN218030479 U CN 218030479U
- Authority
- CN
- China
- Prior art keywords
- plunger
- pump
- spheroid
- supporting seat
- connecting element
- 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.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 239000000126 substance Substances 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000033001 locomotion Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000004308 accommodation Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Details Of Reciprocating Pumps (AREA)
Abstract
The embodiment of the utility model discloses a plunger pump, which comprises a bracket, a motor, a screw rod connecting element, a pump head assembly, a plunger connecting rod, a spheroid and a spheroid supporting seat, wherein the output shaft of the motor is connected to a plunger through the screw rod, the screw rod connecting element, the spheroid supporting seat, the spheroid and the plunger connecting rod; when the plunger pump works, the plunger automatically adjusts and compensates through the running posture of the spheroid in the reciprocating motion process, so that the plunger connected with the plunger always keeps concentric with a sealing piece of the plunger pump, the self-aligning function is realized, and the problem of non-concentricity of the plunger pump, a motor shaft, the plunger guide and the plunger sealing piece is solved; the precision and the long-term stability of the plunger pump are improved, and the service life of the plunger pump is prolonged.
Description
Technical Field
The present invention relates to a plunger pump.
Background
The plunger pump is an important device of the hydraulic system. The plunger reciprocates in the cylinder body, so that the volume of the sealed working cavity changes to realize liquid suction and liquid pressing. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like, and is widely applied to occasions with high pressure, large flow and flow needing regulation, such as hydraulic machines, engineering machinery and ships.
In the existing plunger pump, a motor shaft, a nut shaft, a plunger shaft and a plunger sealing element are not concentric (eccentric) with the plunger sealing element in the working process of the plunger pump (the plunger of the plunger pump is in the reciprocating motion process) due to the problems of processing precision and assembly precision and the inevitable vibration in the motor running process. When the plunger of the plunger pump is eccentric relative to the plunger sealing piece in the reciprocating motion process, the abrasion between the plunger and the plunger sealing piece can be aggravated, the precision of the plunger pump is influenced, the local leakage is caused, the service life of the plunger pump is shortened, the plunger is seriously eccentric, and even the movement of the plunger is blocked and blocked, so that the plunger pump fails.
SUMMERY OF THE UTILITY MODEL
One of the objectives of the present invention is to provide a plunger pump, which can automatically make the axis of the plunger pump coincide with the axis of the sealing element of the plunger pump during the reciprocating process, so that the force applied to the sealing element of the plunger is uniform, and the service life of the sealing element of the plunger is prolonged.
In one embodiment of the present invention, there is provided a plunger pump characterized by comprising:
a bracket including a first side and a second side opposite to each other;
the motor is arranged on the first side of the bracket, and an output shaft of the motor is connected with a lead screw;
the screw rod connecting element comprises a first end and a second end opposite to the first end, the first end is provided with a threaded hole, and the threaded hole is meshed with the screw rod;
a pump head assembly including a pump housing mounted on the second side of the bracket and a plunger at least a portion of which is housed within the pump housing, the plunger being movable within the pump housing relative to the pump housing;
a plunger connecting rod, one end of which is fixedly connected to the plunger;
a ball fixedly connected to the other end of the plunger connecting rod;
the spheroid supporting seat is fixedly connected to the second end of the lead screw connecting element, and an accommodating space is formed in the spheroid supporting seat;
wherein the content of the first and second substances,
the spheroid is accommodated in the accommodating space of the spheroid supporting seat, at least one part of the outer surface of the spheroid and at least one part of the inner surface of the accommodating space of the spheroid supporting seat are mutually attached, and the spheroid can rotate relative to the spheroid supporting seat;
the surface of the sphere body, which is mutually attached to the sphere body supporting seat, is at least one part of a spherical surface.
In one embodiment of the invention, the pump head assembly further comprises a plunger seal member mounted in the pump housing, the plunger passing through the plunger seal member.
In one embodiment of the present invention, a cavity is formed in the pump housing, the cavity being open at a side of the pump housing facing the holder, one end of the plunger is received in the cavity, and the other end extends from the opening to the outside of the pump housing, and the plunger seal member is mounted at the opening.
In one embodiment of the invention, the screw connecting element is provided with a supporting pressure plate, the supporting pressure plate is arranged on the second end of the screw connecting element and presses the spheroid supporting seat on the screw connecting element.
In one embodiment of the invention, the plunger pump further comprises a position sensor.
In one embodiment of the invention, the position sensor is arranged on the spindle connection element.
When the plunger pump works, the spherical body can drive the plunger to swing relatively in the spherical body supporting seat, so that the deviation of the plunger relative to the plunger sealing element is automatically compensated, the plunger and the plunger sealing element are always concentric, the precision and the long-term stability of the plunger pump are improved, and the service life of the plunger pump is prolonged.
Drawings
Fig. 1 is a schematic front view of a plunger pump according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of a plunger pump according to an embodiment of the present invention.
Fig. 3 is a perspective view of a bracket of the plunger pump according to an embodiment of the present invention.
Fig. 4 is a perspective view of a part of the elements of the plunger pump of one embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of a part of the components of a plunger pump according to an embodiment of the present invention.
Detailed Description
The specific structure of the plunger pump according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, in one embodiment of the present invention, a plunger pump may include a motor 1, a stand 2, and a pump head assembly.
Referring to fig. 1-3, in one embodiment of the invention, the bracket 2 may include a first side 21 and a second side 22. The first side 21 and the second side 22 are opposite to each other. As shown in fig. 3, in one embodiment of the invention, the first side 21 and the second side 22 of the bracket 2 may be interconnected by one or more side walls. An accommodating space is formed between the first side 21 and the second side 22.
The motor 1 is mounted on a first side 21 of the bracket 2. For example, the motor 1 may be mounted on the first side 21 of the bracket 2 by means of screws 12. The motor 1 has an output shaft which is connected to a lead screw 16, the lead screw 16 being provided with a thread. In the embodiment of the present invention, the lead screw 16 may be integrated with the output shaft of the motor 1, i.e. a part of the output shaft; alternatively, the lead screw 16 may be a separate, separate component that is fixedly connected to the output shaft of the motor 1 by a suitable connection (e.g., welding, screwing, snapping, riveting, etc.).
Referring to fig. 2 and 3, in one embodiment of the invention, the motor 1 may be mounted on the side of the first side 21 of the bracket 2 remote from the second side 22, i.e. on the outside of the bracket 2, and its output shaft or lead screw 16 protrudes through an opening 210 provided on the first side 21 into the space between the first side 21 and the second side 22.
Referring to fig. 2, in one embodiment of the present invention, the plunger pump further comprises a lead screw connection element 3. The screw connecting element 3 comprises a first end 31 and a second end 32 opposite to the first end 31. A threaded bore 310 is provided in the first end 31. The screw connection element 3 is connected to the screw 16 via a threaded bore 310, i.e. the threaded bore 310 at the first end 31 of the screw connection element 3 engages with the screw 16. When the threaded spindle 16 is rotated by the drive of the electric motor 1, the threaded spindle connection element 3 can be driven relative to the electric motor 1 (and relative to the holder 2) in the axial direction of the threaded spindle 16 by the action of the mutually engaging threads.
Referring to fig. 2, it can be seen that in one embodiment of the present invention, the screw connecting element 3 may be provided on a portion of the screw extending between the first side 21 and the second side 22 of the bracket 2, i.e. in a space between the first side 21 and the second side 22.
Referring to fig. 1-3, in one embodiment of the invention, the pump head assembly may be mounted on the second side 22 of the frame 2. In one embodiment, the pump head assembly may include a pump housing 6 and a plunger 7. The pump housing 6 is mounted on the second side 22 of the bracket 2, for example by means of screws 13 on the second side 22. At least a portion of the plunger 7 is housed in the pump housing. For example, referring to fig. 2, a cavity 60 is formed in the pump housing 6. The cavity 60 may be provided with an opening at the side of the pump housing 6 facing the holder 2. One end of the plunger 7 may be received in the cavity 60 and the other end extends out of the pump housing 6 from the opening. The plunger 7 is movable relative to the pump housing 6 within the pump housing 6 (e.g., within the cavity 60).
In one embodiment of the invention, the pump head assembly may further comprise a plunger sealing element 8. The plunger seal 8 is mounted in the pump housing 6, and the plunger 7 passes through the plunger seal 8.
For example, referring to fig. 2, the plunger seal 8 may be mounted at the opening of the cavity 60 of the pump housing 6. The aforementioned other end of the plunger 7 extends outside the pump housing 6 through the plunger seal member 8. The plunger sealing element 8 is capable of forming a seal between the plunger 7 and the pump housing 6.
Referring to fig. 2 and 3, the pump housing 6 may be mounted on the side of the second side 22 of the holder 2 remote from the first side 21, i.e. outside the holder 2. The plunger 7 can protrude through an opening 220 provided on the second side 22 into the space between the first side 21 and the second side 22 of the holder 2.
Referring to fig. 2, 4 and 5, in one embodiment of the present invention, the plunger pump further includes a plunger connecting rod 9, a ball 11 and a ball support seat 4.
One end of the plunger connecting rod 9 is fixedly connected to the plunger 7, for example, referring to fig. 2, to one end of the plunger 7 protruding out of the pump housing 6. Here, the connection of the plunger connecting rod 9 to the plunger 7 may be any suitable connection, such as a screw connection, an interference fit connection, a threaded connection, or the like. The ball 11 is fixedly coupled to the other end of the plunger connecting rod 9. Similarly, the connection of the ball 11 to the plunger connecting rod 9 may be any suitable connection, such as a screw connection, an interference fit connection, a threaded connection, or the like.
The spheroid support base 4 is fixedly connected to the second end 32 of the screw connecting element 3. For example, referring to fig. 2, in one embodiment of the present invention, a support platen 5 may be provided on the screw connecting member 3. The support platen 5 may be mounted (e.g., by screws or the like) to the second end of the screw connecting element 3 and press the ball support block 4 against the second end of the screw connecting element 3. For example, referring to fig. 2, the second end of the screw connecting element 3 is provided with a step portion on which the sphere support base 4 is pressed by the support pressing plate 5, thereby fixedly connecting the sphere support base 4 to the screw connecting element 3.
It will be readily appreciated that in other embodiments, the spheroid bearing blocks 4 may also be connected to the screw connecting element 3 using other suitable means and structures.
Referring to fig. 2 and 5, an accommodation space is formed in the spheroid support base 4, the spheroid 11 is accommodated in the accommodation space of the spheroid support base 4, and at least a portion of an outer surface of the spheroid 11 and at least a portion of an inner surface of the accommodation space of the spheroid support base 4 are attached to each other, and the spheroid 11 is rotatable with respect to the spheroid support base 4. That is, at least a portion of the outer surface of the ball 11 forms a sliding fit with at least a portion of the inner surface of the ball support seat 4.
In this way, the output shaft of the motor 1 is connected to the plunger 7 through the lead screw 16, the lead screw connecting member 3, the spheroid support seat 4, the spheroid 11 and the plunger connecting rod 9, so that the rotational motion of the output shaft of the motor 1 can be converted into the reciprocating motion of the plunger 7 in the pump housing 6.
In one embodiment of the present invention, the surface of the ball 11 that abuts the ball support 4 (i.e., the surface that forms a sliding fit) is at least a portion of a spherical surface. For example, referring to fig. 5, in an embodiment of the present invention, the spherical body 11 may be integrally formed into a spherical shape, for example, the spherical body or a part of the spherical body may be integrally formed, the outer surface of the spherical body is a spherical surface of the spherical body or a part of the spherical surface, and the inner surface of the spherical body support seat 4 (the surface surrounding the receiving space of the spherical body support seat 4) is also at least a part of the spherical surface of the spherical body. Therefore, when the plunger pump works, the spherical body 11 can drive the plunger 7 to swing relatively in the spherical body supporting seat 4, so that the deviation of the plunger 7 relative to the plunger sealing element 8 is automatically compensated, the plunger and the plunger sealing element are always concentric, the precision and the long-term stability of the plunger pump are improved, and the service life of the plunger pump is prolonged.
In one embodiment of the invention, the plunger pump may also comprise other accessory elements. For example, in one embodiment, the plunger pump may further include a position sensor 10. The position sensor 10 may be provided on the screw connecting element 3 so as to sense the position of the screw connecting element 3.
The present invention has been described above with reference to specific examples, but the present invention is not limited to these specific examples. It will be understood by those skilled in the art that various changes, substitutions of equivalents, variations, and the like can be made thereto without departing from the spirit of the invention, and the scope of the invention is to be determined from the following claims. Furthermore, the various references to "one embodiment" above refer to different embodiments, which may, of course, be combined in whole or in part in a single embodiment.
Claims (5)
1. A plunger pump, comprising:
a bracket including first and second sides opposite one another;
the motor is arranged on the first side of the bracket, and an output shaft of the motor is connected with a lead screw;
the screw rod connecting element comprises a first end and a second end opposite to the first end, the first end is provided with a threaded hole, and the threaded hole is meshed with the screw rod;
a pump head assembly including a pump housing mounted on the second side of the bracket and a plunger at least a portion of which is housed within the pump housing, the plunger being movable within the pump housing relative to the pump housing;
a plunger connecting rod, one end of which is fixedly connected to the plunger;
a ball fixedly connected to the other end of the plunger connecting rod;
the spheroid supporting seat is fixedly connected to the second end of the lead screw connecting element, and an accommodating space is formed in the spheroid supporting seat;
wherein the content of the first and second substances,
the spheroid is accommodated in the accommodating space of the spheroid supporting seat, at least one part of the outer surface of the spheroid and at least one part of the inner surface of the accommodating space of the spheroid supporting seat are mutually attached, and the spheroid can rotate relative to the spheroid supporting seat;
the surface of the sphere body, which is mutually attached to the sphere body supporting seat, is at least one part of a spherical surface.
2. The plunger pump of claim 1, wherein: the pump head assembly further comprises a plunger seal element mounted in the pump housing, the plunger passing through the plunger seal element.
3. The plunger pump of claim 2, wherein: the pump casing is provided with a cavity, the cavity is opened at one side of the pump casing facing the bracket, one end of the plunger is accommodated in the cavity, the other end of the plunger extends out of the pump casing from the opening, and the plunger sealing element is arranged at the opening.
4. The plunger pump of claim 1, wherein: and the screw rod connecting element is provided with a supporting pressure plate, the supporting pressure plate is arranged on the second end of the screw rod connecting element, and the spherical body supporting seat is pressed on the screw rod connecting element.
5. The plunger pump of claim 1, further comprising a position sensor disposed on the lead screw coupling element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221524259.2U CN218030479U (en) | 2022-06-18 | 2022-06-18 | Plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221524259.2U CN218030479U (en) | 2022-06-18 | 2022-06-18 | Plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218030479U true CN218030479U (en) | 2022-12-13 |
Family
ID=84376400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221524259.2U Expired - Fee Related CN218030479U (en) | 2022-06-18 | 2022-06-18 | Plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218030479U (en) |
-
2022
- 2022-06-18 CN CN202221524259.2U patent/CN218030479U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW201537026A (en) | Diaphragm pump | |
| CN218030479U (en) | Plunger pump | |
| CN112361671A (en) | Solenoid valve with hard seal structure | |
| CN213841418U (en) | Solenoid valve with hard seal structure | |
| CN217271740U (en) | Swing rod device | |
| CN214024716U (en) | Lead screw prestretching mechanism | |
| CN210060917U (en) | Assembling tool for brake cylinder of hydraulic motor | |
| CN210013987U (en) | Electric push rod | |
| CN209875401U (en) | Speed reducer for metering pump | |
| CN210431126U (en) | Synchronous belt parallel servo electric cylinder | |
| CN115839330A (en) | Flow calculation control structure of peristaltic pump | |
| CN113560933A (en) | Screw rod stretching support structure and mounting method thereof | |
| CN110296222B (en) | Electronic expansion valve | |
| CN111852817A (en) | Linear compressor with resonance system | |
| CN218030480U (en) | Rotary plunger pump | |
| CN210147890U (en) | Pressing device | |
| CN212470318U (en) | Simultaneously-rotating telescopic mechanism | |
| CN217462513U (en) | Double-end plunger casing | |
| CN110686057A (en) | High-thrust parallel electric cylinder and control method | |
| CN215595806U (en) | Quantitative high-pressure plunger pump | |
| CN218971402U (en) | Plunger pump | |
| CN115823331B (en) | Angular travel film type actuating mechanism | |
| CN218698919U (en) | Electric clamping jaw based on two motions | |
| CN214787846U (en) | One-way valve type plunger pump | |
| CN220581410U (en) | Cylinder capable of improving guiding precision |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20221213 |