Plunger pump sealing assembly, plunger pump, cleaning machine motor pump and high-pressure cleaning machine
By employing a multi-seal design in the plunger pump sealing assembly, the problems of water leakage and motor overheating caused by poor sealing in high-pressure cleaners are solved, achieving better sealing effect and lower motion resistance, and extending the service life of the motor.
Patent Information
- Application Number
- CN202422892651.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-26
AI Technical Summary
The plunger pump in existing high-pressure cleaners has poor sealing during reciprocating motion, which leads to abnormal water leakage and increases the resistance of the plunger movement, resulting in increased motor power and possible overheating damage.
The plunger pump sealing assembly with a multi-seal design includes a connecting bracket and multiple first and second sealing rings, which are respectively set on the inner and outer walls of the bracket for multiple seals between the plunger and the working chamber, reducing the amount of compression on the plunger and lowering the motion resistance.
It improves the sealing effect, reduces media leakage, lowers the resistance of the plunger movement, avoids motor overheating, and extends the motor's service life.
Smart Images
Figure CN223498114U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cleaning machine motor pump technology, specifically to a plunger pump sealing assembly, a plunger pump, a cleaning machine motor pump, and a high-pressure cleaner. Background Technology
[0002] like Figure 1 As shown, the high-pressure pump of an existing high-pressure washer is a motor-driven swashplate axial piston pump, which includes a piston pump 100, a hydraulic cylinder 200, and a motor 300. The output shaft of the motor 300 is connected to a swashplate 7 housed within the hydraulic cylinder 200, driving the swashplate 7 in a circular motion. During this circular motion, the swashplate 7 generates a horizontal height difference, which is transmitted to the piston 6 via a planar thrust bearing 8. Under the action of the swashplate 7 and a spring 9, the piston 6 performs a linear reciprocating motion parallel to the output shaft of the motor 300, thereby squeezing the low-pressure inlet water to obtain high-pressure outlet water, achieving a pressurization effect.
[0003] This type of high-pressure pump has certain potential risks: such as... Figure 2 As shown, the plunger 6 passes through the water seal 11, connecting bracket 1, and oil seal 10 during its reciprocating motion. The connecting bracket 1 compresses the water seal 11, preventing it from shifting and achieving a static seal. The inner lip of the water seal 11 compresses the plunger 6, and the outer lip compresses the pump cover. Both the inner and outer lips provide a single seal. The long-term reciprocating motion of the plunger 6 may cause wear on the inner lip of the water seal 11, leading to leakage in the high-pressure washer. Furthermore, due to the high water pressure, a larger compression of the plunger 6 by the inner lip of the water seal 11 is required to achieve a good seal. This increases the resistance experienced by the plunger 6 during its linear reciprocating motion. To maintain this linear reciprocating motion, the motor 300 needs to output more power to overcome this resistance, resulting in an increase in the motor 300's current. If the motor is under high load for an extended period, it may overheat or even be damaged. All of these factors can cause the high-pressure washer to malfunction. Utility Model Content
[0004] In view of the above, the purpose of this application is to provide a plunger pump sealing assembly, a plunger pump, a cleaning machine motor pump, and a high-pressure cleaner to solve at least one of the above technical problems.
[0005] In a first aspect, this application provides a plunger pump sealing assembly for sealing between the plunger and the working chamber of a plunger pump. The plunger pump sealing assembly includes: a connecting bracket for installation in a sealing assembly mounting groove opened within the plunger pump housing and communicating with the working chamber; the connecting bracket has an annular structure; the inner hole of the connecting bracket is for the plunger to pass through and provides guidance and support for the reciprocating motion of the plunger; the inner wall and outer wall of the connecting bracket are respectively provided with a plurality of first sealing ring grooves and a plurality of second sealing ring grooves; a plurality of first sealing rings are respectively installed in the plurality of first sealing ring grooves for sealing between the inner wall of the connecting bracket and the outer surface of the plunger; and a plurality of second sealing rings are respectively installed in the plurality of second sealing ring grooves for sealing between the outer wall of the connecting bracket and the side wall of the sealing assembly mounting groove.
[0006] In conjunction with the first aspect, in some alternative embodiments, a plurality of first sealing ring grooves are distributed along the axial direction of the connecting bracket, and each first sealing ring groove is arranged along the circumferential direction of the connecting bracket.
[0007] In conjunction with the first aspect, in some alternative embodiments, a plurality of second sealing ring grooves are distributed along the axial direction of the connecting bracket, and each second sealing ring groove is arranged along the circumferential direction of the connecting bracket.
[0008] Secondly, this application provides a plunger pump, including a pump cover, a pump body, a plunger, and a plunger pump sealing assembly as described in any of the embodiments of the first aspect above.
[0009] In conjunction with the second aspect, in some optional embodiments, the pump cover is provided with a working chamber and a channel communicating with the working chamber, and a sealing component mounting groove is provided on the mating surface of the pump cover that mates with the pump body. A connecting bracket is installed in the sealing component mounting groove, and a plunger is installed in the channel and passes through the inner hole of the connecting bracket.
[0010] In conjunction with the second aspect, in some optional embodiments, a step is provided on the outer wall of the connecting bracket, and the step is stopped in conjunction with the mating surface of the pump cover.
[0011] Thirdly, this application provides a cleaning machine motor pump, including a plunger pump, a hydraulic cylinder, and a motor as described in any of the embodiments of the second aspect above, wherein the plunger pump is a swashplate axial plunger pump.
[0012] In conjunction with the third aspect, in some optional embodiments, the mating surface of the pump body that mates with the pump cover is provided with an oil seal mounting groove corresponding to the connecting bracket, and an oil seal is provided in the oil seal mounting groove, with the oil seal and the adjacent end faces of the connecting bracket abutting each other.
[0013] In conjunction with the third aspect, in some optional embodiments, the oil seal and the connecting bracket are respectively provided with a matching convex conical surface and a concave conical surface on adjacent end faces.
[0014] Fourthly, this application provides a high-pressure cleaner, including the cleaner motor pump in any of the embodiments of the third aspect above.
[0015] Based on the above technical solutions, the plunger pump sealing assembly, plunger pump, cleaning machine motor pump, and high-pressure cleaner provided in this application have a multi-seal design for the plunger pump sealing assembly, which improves the sealing effect between the plunger and the working chamber. Compared with a single water seal, the sealing effect is better, effectively solving the problem of abnormal water leakage in existing cleaning machine motor pumps. Compared with a water seal, the multiple first sealing rings of the plunger pump sealing assembly reduce the amount of compression on the plunger during the sealing of the plunger, which can reduce the resistance encountered by the plunger during reciprocating motion, thereby effectively solving the problem of abnormal current increase caused by increased plunger resistance in existing cleaning machine motor pumps. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a cross-sectional view of the motor pump of an existing cleaning machine.
[0018] Figure 2 for Figure 1 A magnified view of a portion of point a.
[0019] Figure 3 This is a cross-sectional view of a plunger pump sealing assembly provided in an embodiment of this application.
[0020] Figure 4 This is a cross-sectional view of a plunger pump provided in an embodiment of this application.
[0021] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.
[0022] Reference numerals: 100, plunger pump; 200, oil cylinder; 300, motor; 1, connecting bracket; 101, first sealing ring groove; 102, second sealing ring groove; 103, step; 104, concave conical surface; 2, first sealing ring; 3, second sealing ring; 4, pump cover; 401, working chamber; 402, channel; 403, sealing component mounting groove; 5, pump body; 501, oil chamber; 502, plunger hole; 503, oil seal mounting groove; 6, plunger; 7, swashplate; 8, flat thrust bearing; 9, spring; 10, oil seal; 11, water seal; 12, spring seat. Detailed Implementation
[0023] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of this application, and not all of them. Based on the description of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.
[0024] In the description of this application, unless otherwise expressly specified and limited, the terms "connection," "setup," "installation," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0025] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “center,” “top,” “bottom,” “inner,” “outer,” “vertical,” “horizontal,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0026] The terms “first,” “second,” “third,” etc., are used only to distinguish elements with similar properties, and do not indicate or imply relative importance or a specific order, unless otherwise explicitly stated or limited.
[0027] The terms “comprising,” “including,” “having,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0028] The term "multiple" means two or more (including two).
[0029] The term "and / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone.
[0030] The terms "an embodiment," "as an example," and "in one implementation" refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which may be included in at least one embodiment or example of this application. These illustrative expressions do not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Where there is no conflict, the embodiments and features described in these embodiments can be combined in a suitable manner.
[0031] First Embodiment
[0032] Figure 3 A cross-sectional view of a plunger pump sealing assembly provided in an embodiment of this application, as shown below. Figure 3 As shown, the first embodiment of this application provides a plunger pump sealing assembly for sealing between the plunger 6 and the working chamber 401 of the plunger pump (see...). Figure 4 The working chamber 401 refers to the cavity within the plunger pump 100 where the reciprocating motion of the plunger 6 enables the intake and discharge of the medium. The plunger pump sealing assembly includes a connecting bracket 1, multiple first sealing rings 2, and multiple second sealing rings 3.
[0033] The connecting bracket 1 is used to install in the sealing component mounting groove 403, which is opened inside the plunger pump housing and communicates with the working chamber 401. The connecting bracket 1 has an annular structure with an inner hole for the plunger 6 to pass through, and provides guidance and support for the reciprocating motion of the plunger 6.
[0034] As an example, Figure 4 This is a cross-sectional view of a plunger pump 100 provided in an embodiment of this application. Figure 5 for Figure 4 A magnified view of a portion of point A, as shown below. Figure 4 and Figure 5 The plunger pump 100 shown has a working chamber 401 located inside a pump cover 4. A sealing component mounting groove 403 is formed on the mating surface of the pump cover 4 that mates with the pump body 5, and corresponds to a channel 402 on the pump cover 4 for the reciprocating motion of the plunger 6. The channel 402 communicates with the working chamber 401. A connecting bracket 1 is used to be installed in the sealing component mounting groove 403 of the plunger pump 100.
[0035] The inner wall of the connecting bracket 1 is provided with a plurality of first sealing ring grooves 101. The plurality of first sealing ring grooves 101 are distributed along the axial direction of the connecting bracket 1. Each first sealing ring groove 101 is arranged along the circumference of the connecting bracket 1 and a first sealing ring 2 is embedded therein. The plurality of first sealing rings 2 are used for multiple sealing between the inner wall of the connecting bracket 1 and the outer surface of the plunger 6.
[0036] As an example, there are two first sealing ring grooves 101 and two first sealing rings 2, and the two first sealing rings 2 make the seal between the inner wall of the connecting bracket 1 and the outer surface of the plunger 6 a double seal.
[0037] The outer wall of the connecting bracket 1 is provided with a plurality of second sealing ring grooves 102. The plurality of second sealing ring grooves 102 are distributed along the axial direction of the connecting bracket 1. Each second sealing ring groove 102 is arranged along the circumference of the connecting bracket 1 and a second sealing ring 3 is embedded therein. The plurality of second sealing rings 3 are used for multiple sealing between the outer wall of the connecting bracket 1 and the side wall of the sealing component mounting groove 403.
[0038] As an example, there are two second sealing ring grooves 102 and two second sealing rings 3, and the two second sealing rings 3 make the seal between the outer wall of the connecting bracket 1 and the side wall of the sealing assembly mounting groove 403 a double seal.
[0039] The plunger pump sealing assembly provided in the first embodiment of this application adopts a multi-seal design. Multiple first sealing rings 2 and multiple second sealing rings 3 are respectively provided on the inner and outer walls of the connecting bracket 1, which can improve the sealing effect during use. When the multiple first sealing rings 2 on the inner wall of the connecting bracket 1 are used to seal the plunger 6, compared with the water seal 11 in the existing cleaning machine motor pump, the amount of compression on the plunger 6 is reduced, thereby reducing the resistance encountered by the plunger 6 when it reciprocates. The plunger pump sealing assembly can be applied to any plunger pump that requires sealing between the plunger and the working chamber.
[0040] Second Embodiment
[0041] Figure 4 This is a cross-sectional view of a plunger pump 100 provided in an embodiment of this application. Figure 5 for Figure 4 A magnified view of a portion of point A, as shown below. Figure 4 and Figure 5 As shown, the second embodiment of this application provides a plunger pump 100, which mainly includes a pump cover 4, a pump body 5, a plunger 6, and the plunger pump sealing assembly in the first embodiment.
[0042] The pump cover 4 and the pump body 5 constitute the plunger pump housing. The pump cover 4 has a working chamber 401 and a channel 402 communicating with the working chamber 401. A sealing component mounting groove 403 is provided on the mating surface of the pump cover 4 that mates with the pump body 5. A plunger pump sealing component is installed in the sealing component mounting groove 403. The plunger 6 is installed in the channel 402 of the pump cover 4 and passes through the inner hole of the connecting bracket 1. During operation, the plunger 6 reciprocates along the channel 402 of the pump cover 4 and the inner hole of the connecting bracket 1.
[0043] In this process, multiple first sealing rings 2 seal the inner wall of the connecting bracket 1 and the outer surface of the plunger 6, and multiple second sealing rings 3 seal the outer wall of the connecting bracket 1 and the side wall of the sealing assembly mounting groove 403. Thus, the plunger pump sealing assembly achieves a seal between the plunger 6 and the working chamber 401.
[0044] The outer wall of the connecting bracket 1 is also provided with a raised step 103, which is used to stop and cooperate with the mating surface of the pump cover 4. That is, when the connecting bracket 1 is installed in the sealing component mounting groove 403, the step 103 is blocked by the mating surface of the pump cover 4 and is located outside the sealing component mounting groove 403. The step 103 serves as an easy-to-operate fulcrum on the connecting bracket 1, making it convenient to insert the connecting bracket 1 into the sealing component mounting groove 403 and remove it from the sealing component mounting groove 403.
[0045] The plunger pump 100 provided in the second embodiment of this application adopts a plunger pump sealing assembly with a multi-seal design, which improves the sealing effect between the plunger 6 and the working chamber 401 and reduces the possibility of media leakage. Compared with the water seal 11 in the existing cleaning machine motor pump, the multiple first sealing rings 2 of the plunger pump sealing assembly reduce the amount of compression on the plunger 6 in sealing the plunger 6, thereby reducing the resistance encountered by the plunger 6 when it reciprocates. The plunger pump 100 can be any plunger pump that requires sealing between the plunger and the working chamber.
[0046] Third Embodiment
[0047] like Figure 4 and Figure 5 As shown, and in combination Figure 1 The third embodiment of this application provides a cleaning machine motor pump, including the plunger pump 100, oil cylinder 200, and motor 300 of the second embodiment. The plunger pump 100 is a swashplate axial plunger pump, which, in addition to the pump cover 4, pump body 5, plunger 6, and plunger pump sealing assembly of the first embodiment, also includes a swashplate 7, a planar thrust bearing 8, a spring 9, and an oil seal 10.
[0048] One end of the pump body 5 is connected to the pump cover 4, forming a plunger pump housing. The other end of the pump body 5 is connected to the oil cylinder 200, forming an oil chamber 501. A swash plate 7 is installed in the oil chamber 501, and the swash plate 7 is connected to the output shaft of the motor 300. The pump body 5 has a plunger hole 502 corresponding to the hole 402 of the pump cover 4. The plunger 6 is installed in the hole 402 of the pump cover 4 and the plunger hole 502 of the pump body 5, and passes through the inner hole of the connecting bracket 1. One end of the plunger 6 is located in the working chamber 401, and the other end of the plunger 6 is located in the oil chamber 501, and abuts against the planar thrust bearing 8 installed on the swash plate 7. A spring 9 is located in the oil chamber 501 and sleeved on the outside of the plunger 6. The two ends of the spring 9 abut against the inner wall of the pump body 5 and the spring seat 12 installed on the other end of the plunger 6, respectively.
[0049] The pump body 5 has an oil seal mounting groove 503 corresponding to the connecting bracket 1 on the mating surface that mates with the pump cover 4. An oil seal 10 is installed in the oil seal mounting groove 503. The oil seal 10 is used for sealing between the plunger 6 and the oil cavity 501. Specifically, the inner lip of the oil seal 10 seals the outer surface of the plunger 6, and the outer lip of the oil seal 10 seals the side wall of the oil seal mounting groove 503. The adjacent end faces of the oil seal 10 and the connecting bracket 1 abut against each other. The adjacent end faces of the oil seal 10 and the connecting bracket 1 are respectively provided with a convex conical surface and a concave conical surface 104 that mate with each other.
[0050] Working principle of the cleaning machine motor pump: When the motor 300 is working, the output shaft of the motor 300 drives the swashplate 7 to make a circular motion. When the swashplate 7 moves in a circular motion, it generates a horizontal height difference, which is transferred to the plunger 6 through the planar thrust bearing 8. The plunger 6 makes a linear reciprocating motion under the action of the swashplate 7 and the spring 9, thereby squeezing the low-pressure water in the working chamber 401 to obtain high-pressure water out, thus achieving the effect of pressurization.
[0051] The cleaning machine motor pump provided in the third embodiment of this application includes a plunger pump 100, which is a swashplate axial plunger pump. A plunger pump sealing assembly with a multi-seal design replaces the water seal 11 to seal the space between the plunger 6 and the working chamber 401. Compared to the single-seal water seal 11, the sealing effect is better, effectively solving the problem of abnormal water leakage in existing cleaning machine motor pumps. The multiple first sealing rings 2 of the plunger pump sealing assembly, compared to the original water seal 11, reduce the amount of compression on the plunger 6 during sealing, lowering the resistance experienced by the plunger 6 during reciprocating motion. This effectively solves the problem of abnormal current increase caused by increased resistance in existing cleaning machine motor pumps.
[0052] Fourth embodiment
[0053] The fourth embodiment of this application provides a high-pressure cleaner, including the cleaner motor pump of the third embodiment. This high-pressure cleaner has the advantages of the cleaner motor pump of the third embodiment, which will not be repeated here.
[0054] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application.
Claims
1. A plunger pump sealing assembly, characterized in that, The plunger pump sealing assembly is used for sealing between the plunger and the working chamber of the plunger pump, and the plunger pump sealing assembly includes: A connecting bracket is used to install in a sealing component mounting groove that communicates with the working chamber inside the plunger pump housing. The connecting bracket has an annular structure. The inner hole of the connecting bracket is used for the plunger to pass through and to provide guidance and support for the reciprocating motion of the plunger. The inner wall and outer wall of the connecting bracket are respectively provided with a plurality of first sealing ring grooves and a plurality of second sealing ring grooves. A plurality of first sealing rings are respectively installed in a plurality of first sealing ring grooves for sealing between the inner wall of the connecting bracket and the outer surface of the plunger; and Multiple second sealing rings are respectively installed in multiple second sealing ring grooves for sealing between the outer wall of the connecting bracket and the side wall of the sealing assembly mounting groove.
2. The plunger pump sealing assembly according to claim 1, characterized in that, Multiple first sealing ring grooves are distributed along the axial direction of the connecting bracket, and each first sealing ring groove is arranged along the circumferential direction of the connecting bracket.
3. The plunger pump sealing assembly according to claim 1, characterized in that, Multiple second sealing ring grooves are distributed along the axial direction of the connecting bracket, and each second sealing ring groove is arranged along the circumferential direction of the connecting bracket.
4. A plunger pump, characterized in that, It includes a pump cover, a pump body, a plunger, and a plunger pump sealing assembly as described in any one of claims 1-3.
5. The plunger pump according to claim 4, characterized in that, The pump cover has a working chamber and a channel communicating with the working chamber. The mating surface of the pump cover that mates with the pump body has a sealing component mounting groove. The connecting bracket is installed in the sealing component mounting groove. The plunger is installed in the channel and passes through the inner hole of the connecting bracket.
6. The plunger pump according to claim 5, characterized in that, The outer wall of the connecting bracket is provided with a step, which is in contact with the mating surface of the pump cover.
7. A cleaning machine motor pump, characterized in that, Includes a piston pump, a hydraulic cylinder, and a motor as described in any one of claims 4-6, wherein the piston pump is a swashplate axial piston pump.
8. The cleaning machine motor pump according to claim 7, characterized in that, The pump body has an oil seal mounting groove on its mating surface that mates with the pump cover. The oil seal mounting groove contains an oil seal, and the oil seal abuts against the adjacent end face of the connecting bracket.
9. The cleaning machine motor pump according to claim 8, characterized in that, The oil seal and the connecting bracket are respectively provided with a convex conical surface and a concave conical surface on their adjacent end faces.
10. A high-pressure cleaner, characterized in that, Including the cleaning machine motor pump as described in any one of claims 7-9.