Engine plunger
By designing sealing ring and elastic ring components on the engine plunger, the problem of degradation of sealing effect caused by wear of seals is solved, and good sealing and convenient installation can be maintained even after wear.
Patent Information
- Application Number
- CN202421835974.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-07-31
AI Technical Summary
The sealing effect of the sealing member is reduced due to wear during the reciprocating movement of the plunger.
The engine plunger design is adopted that includes a sealing ring and an elastic sleeve assembly. The sealing ring is sleeved on the elastic ring. The elastic ring is located in the mounting ring groove and moves away from the groove to provide an outwardly extended elastic force to offset the wear gap. The elastic ring is divided into a half ring and increases the contact area through the arc-shaped abutment groove.
Even if the sealing ring is worn, it can still maintain good sealing, easy to install and stable.
Smart Images
Figure CN223164621U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of engine accessories, and particularly relates to an engine plunger. Background Art
[0002] The plunger is mainly used to transport fluids in a pump or compressor. The plunger is installed in an automotive engine and can move back and forth. Two valves are respectively installed on the plunger, and a suitable seal is installed in the gap between the plunger and the cylinder block of the automotive engine. When the plunger is pulled backward, the outlet pipe valve is closed, then the inlet pipe valve is opened, and fluid is sucked from the inlet pipe. When the plunger moves forward, the inlet pipe valve will close, the outlet pipe valve will open, and the fluid in the cylinder block of the automotive engine is squeezed out from the outlet pipe.
[0003] In the related art, the seal is an O-ring sleeved on the plunger. However, as the plunger reciprocates, the seal also moves synchronously with the plunger. When the seal has some wear and tear due to friction during the movement with the plunger, the sealing effect of the seal will be reduced. Utility Model Content
[0004] In order to enable the seal on the plunger to still have a sealing effect after a certain amount of wear, the present application provides an engine plunger.
[0005] An engine plunger provided by the present application adopts the following technical solutions:
[0006] An engine plunger includes a plunger body, a sealing ring, and an elastic sleeve ring assembly. The elastic sleeve ring assembly includes an elastic ring. The sealing ring is sleeved on the elastic ring. An installation ring groove is formed on the plunger body. The elastic ring is sleeved on the plunger body and is located in the installation ring groove, so that the sealing ring always has a tendency to move away from the notch of the installation groove. The outer peripheral wall of the sealing ring protrudes from the installation groove.
[0007] Preferably, an arc-shaped abutting groove that fits the inner peripheral wall of the elastic ring is formed on the outer peripheral wall of the elastic ring.
[0008] Preferably, the elastic sleeve ring assembly further includes an installation ring. The elastic ring is sleeved on the installation ring, and a deformation gap is provided between the elastic ring and the installation ring.
[0009] Preferably, the installation ring includes a first installation half-ring and a second installation half-ring. The first installation half-ring and the second installation half-ring are inserted into the installation ring groove and spliced to form a complete ring. The elastic ring includes a first elastic half-ring fixedly installed on the outer wall of the first installation half-ring and a second elastic half-ring fixedly installed on the second installation half-ring.
[0010] Preferably, a docking post is provided on one side of the first mounting half-ring close to the second mounting half-ring, and a docking groove for inserting the docking post is provided on one side of the second mounting half-ring close to the first mounting half-ring.
[0011] Preferably, a guiding inclined surface facilitating insertion into the docking groove is provided on one side of the docking post close to the second mounting half-ring.
[0012] Preferably, a deformable arc surface facilitating elastic deformation of the elastic ring when being extruded is provided on the outer peripheral wall of the elastic ring.
[0013] Preferably, two mounting ring grooves are spaced apart on the plunger body, and two sealing rings and two elastic sleeve ring assemblies are also provided. The two elastic sleeve ring assemblies correspond to the two mounting ring grooves one by one.
[0014] In summary, the present application includes at least one of the following beneficial technical effects:
[0015] 1. After a certain amount of wear occurs to the sealing ring, since the elastic ring continuously applies an outward expanding elastic force to the sealing ring, the gap generated after wear will be offset, so that the sealing ring is always in a state of tightly pressing against the cylinder block. Therefore, even if the sealing ring is worn, it still has good sealing performance.
[0016] 2. The mounting ring is divided into a first mounting half-ring and a second mounting half-ring, and the elastic ring is divided into a first elastic half-ring and a second elastic half-ring. During installation, it only needs to dock and fasten the first mounting half-ring and the second mounting half-ring in the mounting ring groove, so that the installation of the elastic sleeve ring assembly is relatively convenient.
[0017] 3. The arc-shaped abutting groove on the elastic ring increases the contact area between the sealing ring and the elastic ring, so that when the elastic ring provides an outward expansion force to the sealing ring, it is more stable. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is an exploded view of the engine plunger in the embodiment of the present application.
[0019] Figure 2 is an exploded view of the elastic sleeve ring assembly in the embodiment of the present application.
[0020] Figure 3 is Figure 2 an enlarged view of part A in
[0021] Explanation of the accompanying drawings: 1. Plunger body; 11. Mounting ring groove; 2. Sealing ring; 3. Elastic ring assembly; 31. Elastic ring; 311. First elastic half ring; 312. Second elastic half ring; 313. Variable arc surface; 314. Arc-shaped abutment groove; 32. Mounting ring; 321. First mounting half ring; 3211. Docking column; 3212. Guide slope; 322. Second mounting half ring; 3221. Docking groove; 33. Deformation gap. DETAILED DESCRIPTION
[0022] The following is combined with Figures 1-3 This application is described in further detail.
[0023] The embodiment of the present application discloses an engine plunger. Figure 1 The engine plunger comprises a plunger body 1, a sealing ring 2, and an elastic collar assembly 3. The plunger body 1 has a mounting groove 11, into which the elastic collar assembly 3 is fitted. The sealing ring 2 is fitted over the elastic collar assembly 3, with its outer circumferential wall protruding from the mounting groove 11. The elastic collar assembly 3 exerts a spring force on the sealing ring 2 that constantly moves it away from the mounting groove, ensuring that the sealing ring 2 remains secure against the cylinder block and provides a seal even after wear.
[0024] In this embodiment, the plunger body 1 preferably has two mounting ring grooves 11, and two corresponding sealing rings 2 are also provided. Two sets of elastic collar assemblies 3 are also provided, and the two sets of elastic collar assemblies 3 are respectively installed in the two mounting ring grooves 11, and the two sealing rings 2 are respectively mounted on the two elastic collar assemblies 3. The following describes the installation structure using one set of elastic collar assemblies 3 and one mounting ring 32 as an example.
[0025] Reference Figure 1 and Figure 2 The elastic collar assembly 3 includes an elastic ring 31 and a mounting ring 32. The mounting ring 32 is installed in the mounting ring groove 11, the elastic ring 31 is sleeved on the mounting ring 32, and the elastic ring 31 is fixed to the mounting ring 32 by welding.
[0026] Reference Figure 2 and Figure 3, the elastic ring 31 includes a first elastic half-ring 311 and a second elastic half-ring 312. Both the first elastic half-ring 311 and the second elastic half-ring 312 are semi-circular ring pieces, and a complete circular ring will be formed after the first elastic half-ring 311 and the second elastic half-ring 312 are spliced. The outer peripheral wall of the first elastic half-ring 311 is provided with a deformable arc surface 313 that makes the first elastic half-ring 311 prone to deformation when being squeezed. Similarly, the outer peripheral wall of the second elastic half-ring 312 is also provided with a deformable arc surface 313 that makes the second elastic half-ring 312 prone to deformation when being squeezed. Compared with a plane, the deformable arc surface 313 enables the first elastic half-ring 311 or the second elastic half-ring 312 to deform more smoothly and is not prone to jamming.
[0027] An arc-shaped abutting groove 314 is formed on the outer peripheral wall of the first elastic half-ring 311, that is, the arc-shaped abutting groove 314 is formed on the deformable arc surface 313 of the first elastic half-ring 311. Similarly, an arc-shaped abutting groove 314 is also formed on the outer peripheral wall of the second elastic half-ring 312, and the arc-shaped abutting groove 314 on the second elastic half-ring 312 is also located on the deformable arc surface 313 of the second elastic half-ring 312. The arc-shaped abutting groove 314 on the first elastic half-ring 311 and the arc-shaped abutting groove 314 on the second elastic half-ring 312 communicate with each other to form an arc groove. After the sealing ring is sleeved on the first elastic half-ring 311 and the second elastic half-ring 312, it will be respectively stuck into the arc-shaped abutting groove 314 on the first elastic half-ring 311 and the arc-shaped abutting groove 314 on the second elastic half-ring 312, thereby making the contact area between the sealing ring 2 and the first elastic half-ring 311 and the second elastic half-ring 312 larger and more stable.
[0028] Combined Figure 1 Refer to Figure 2 With Figure 3 , the mounting ring 32 includes a first mounting half-ring 321 and a second mounting half-ring 322. A complete ring formed by splicing the first mounting half-ring 321 and the second mounting half-ring 322 is inserted into the mounting ring groove 11, and the first mounting half-ring 321 and the second mounting half-ring 322 are connected by plugging. The first elastic half-ring 311 is welded and fixed on the outer peripheral wall of the first mounting half-ring 321, and the second elastic half-ring 312 is welded and fixed on the outer peripheral wall of the second mounting half-ring 322.
[0029] Refer to Figure 2 With Figure 3, on one side of the first elastic half-ring 311 close to the outer wall of the first mounting half-ring 321, there is a bent arc-shaped groove, and this arc-shaped groove is set as the deformation gap 33, so that there is a space between the first elastic half-ring 311 and the first mounting half-ring 321 that allows the first elastic half-ring 311 to deform after being squeezed. Similarly, on one side of the second elastic half-ring 312 close to the outer wall of the second mounting half-ring 322, there is a bent arc-shaped groove, and this arc-shaped groove is also set as the deformation gap 33, so that there is a space between the second elastic half-ring 312 and the second mounting half-ring 322 that allows the second elastic half-ring 312 to deform after being squeezed.
[0030] Refer to Figure 2 And Figure 3 , at both ends of the first mounting half-ring 321 close to the second mounting half-ring 322, there are integrally formed docking posts 3211. At both ends of the second mounting half-ring 322 close to the first mounting half-ring 321, there are docking grooves 3221 opened. The two docking posts 3211 are respectively inserted into the two docking grooves 3221, so that the first mounting half-ring 321 and the second mounting half-ring 322 are plugged together. Among them, in order to facilitate the insertion of the docking post 3211 into the corresponding docking groove 3221, a guiding inclined surface 3212 (i.e., chamfer) is provided on one side of each docking post 3211 close to the second mounting half-ring 322.
[0031] The implementation principle of an engine plunger in an embodiment of this application is as follows: First, when installing the elastic sleeve ring assembly 3, first insert the first mounting half-ring 321 into the mounting ring groove 11 from one side; then insert the second mounting half-ring 322 into the mounting ring groove 11 from the other side, and make the docking post 3211 insert into the docking groove 3221. Finally, the sealing ring 2 is sleeved on the outer peripheral walls of the first elastic half-ring 311 and the second elastic half-ring 312. During the reciprocating movement of the plunger body 1 in the engine, the sealing ring 2 will always be pressed against the cylinder block of the engine under the action of the first elastic half-ring 311 and the second elastic half-ring 312. When the sealing ring 2 is worn, the sealing ring 2 will move under the elastic force of the first elastic half-ring 311 and the second elastic half-ring 312 to offset the gap generated by the wear, thereby improving the sealing effect.
[0032] The above are all preferred embodiments of this application. Without restricting the protection scope of this application accordingly, therefore: All equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.
Claims
1. An engine plunger, characterized in that: It includes a plunger body (1), a sealing ring (2) and an elastic collar assembly (3). The elastic collar assembly (3) includes an elastic ring (31). The sealing ring (2) is sleeved on the elastic ring (31). An installation ring groove (11) is formed on the plunger body (1). The elastic ring (31) is sleeved on the plunger body (1) and the elastic ring (31) is located in the installation ring groove (11) so that the sealing ring (2) always has a tendency to move away from the notch of the installation groove. The outer peripheral wall of the sealing ring (2) protrudes from the installation groove.
2. The engine plunger according to claim 1, wherein: An arc-shaped abutting groove (314) that fits the inner peripheral wall of the elastic ring (31) is formed on the outer peripheral wall of the elastic ring (31).
3. The engine plunger according to claim 2, wherein: The elastic collar assembly (3) further includes an installation ring (32). The elastic ring (31) is sleeved on the installation ring (32). A deformation gap (33) is provided between the elastic ring (31) and the installation ring (32).
4. An engine plunger according to claim 3, characterized in that: The installation ring (32) includes a first installation half-ring (321) and a second installation half-ring (322). The first installation half-ring (321) and the second installation half-ring (322) are inserted into the installation ring groove (11) and spliced to form a complete ring. The elastic ring (31) includes a first elastic half-ring (311) fixedly installed on the outer wall of the first installation half-ring (321) and a second elastic half-ring (312) fixedly installed on the second installation half-ring (322).
5. An engine plunger according to claim 4, characterized in that: A docking post (3211) is provided on one side of the first installation half-ring (321) close to the second installation half-ring (322). A docking groove (3221) for inserting the docking post (3211) is formed on one side of the second installation half-ring (322) close to the first installation half-ring (321).
6. The engine plunger according to claim 5, characterized in that: A guiding inclined surface (3212) facilitating insertion into the docking groove (3221) is provided on one side of the docking post (3211) close to the second installation half-ring (322).
7. The engine plunger according to claim 1, wherein: A deformable arc surface (313) facilitating elastic deformation of the elastic ring (31) when being squeezed is provided on the outer peripheral wall of the elastic ring (31).
8. The engine plunger according to claim 1, characterized in that: Two installation ring grooves (11) are spaced apart on the plunger body (1). Two sealing rings (2) and two elastic collar assemblies (3) are also provided. The two elastic collar assemblies (3) correspond to the two installation ring grooves (11) one by one.