Anti-abrasion piston sealing ring capable of being adjusted in self-adaptive mode
By introducing a flexible metal ring, tensioning plate, and spring structure into the piston seal, adaptive adjustment is achieved, solving the problem of gap changes caused by thermal expansion and wear of the seal, thus improving sealing performance and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2026-03-20
AI Technical Summary
Existing wear-resistant piston seals suffer from reduced clearance due to differences in the thermal expansion coefficients of metal materials at high temperatures, and increased clearance due to low-temperature shrinkage. Long-term high-frequency reciprocating motion generates abrasive wear and adhesive wear, which alter the fit tolerances and increase the risk of seal failure.
A self-adjustable wear-resistant piston seal ring is designed, which adopts a combination structure of flexible metal ring, tension plate and tension spring. The outer sealing lip is adjusted by elastic extension and contraction to adapt to the wear changes between piston and cylinder and maintain the sealing connection.
It effectively prevents partial separation or uneven contact between the sealing ring and the cylinder body, improves sealing reliability, extends service life, and ensures safe operation of the system.
Smart Images
Figure CN224017701U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to alcohol ester production technical field, more particularly to the anti -wear piston sealing ring of self -adaptation adjustment. BACKGROUND
[0002] Anti -wear piston sealing ring is a kind of functional components for the sealing between piston and cylinder, core function is to prevent fluid (liquid or gas) leakage, resist the friction loss caused by reciprocating motion of piston simultaneously.Its design and material need to consider high wear resistance, low friction coefficient and good sealing performance, and is widely used in hydraulic system, pneumatic equipment, automobile engine, engineering machinery and other fields;
[0003] Anti -wear piston sealing ring is in close contact with piston and cylinder by interference fit, and forms a sealed barrier.When the piston moves, the wear-resistant material on the surface of the sealing ring can reduce the frictional resistance and reduce wear;Part of the structural design (such as lip, wedge section) can use fluid pressure to seal tightly and improve sealing reliability.Long-term operation, wear-resistant material and optimized surface treatment (such as coating, texture) can delay the wear process and maintain sealing performance.Under the dynamic working condition of using piston sealing ring, the fit clearance between piston and cylinder is easily affected by temperature fluctuations, mechanical wear and working load changes and other factors, for example, the difference in thermal expansion coefficient of metal materials in high temperature environment can cause the gap to shrink, while the low temperature shrinkage may expand the gap;Abrasive wear and adhesive wear caused by long-term high-frequency reciprocating motion will continue to change the fit tolerance.When the gap exceeds the design compensation range of the sealing ring, the sealing ring and the cylinder surface will be partially detached or unevenly contacted, which may cause sealing failure risk;
[0004] This gap anomaly not only causes fluid (hydraulic oil, compressed gas, etc.) leakage, directly reducing system efficiency and pressure stability, but also may cause cavitation phenomenon——when fluid passes through the gap at high speed, bubbles are formed, and the impact pressure (up to hundreds of MPa) generated by the collapse of bubbles will accelerate the fatigue damage of the sealing ring and the cylinder surface.In addition, the change of gap may also cause abnormal load of the sealing ring, causing stress concentration in the lip, accelerating wear and shortening the service life.If applied to high-precision equipment such as automobile engine and hydraulic pump, such failure may cause chain failure and threaten the safe operation of the system. UTILITY MODEL CONTENTS
[0005] The utility model discloses a purpose at providing the anti -wear piston sealing ring of self -adaptation adjustment, it is in order to solve the above-mentioned piston sealing ring in prior art when using, the difference of metal material thermal expansion coefficient under high temperature environment can cause clearance to reduce, and low temperature contraction can expand the clearance, the abrasive wear of long -term high frequency reciprocating motion, sticking wear, more will continue to change the fit tolerance.
[0006] In order to realize above-mentioned purpose, the utility model provides the following technical scheme: the anti -wear piston sealing ring of self -adaptation adjustment, including inner sealing lip and the outer sealing lip of connecting in the other end of inner sealing lip, the inner sealing lip and outer sealing lip enclose and constitute installation groove;
[0007] The inner wall of outer sealing lip is provided with the reserved groove, and the inner wall of the reserved groove is connected with the flexible metal ring, the outer side wall of the flexible metal ring is connected with the tensioning plate, the inner side of the tensioning plate is connected with the tensioning spring, and the movable groove of the flexible metal ring is close to the tensioning spring.
[0008] As the anti -wear piston sealing ring of self -adaptation adjustment of the utility model preferably, the flexible metal ring is 304 stainless steel material, and the flexible metal ring is embeddedly connected with the reserved groove.
[0009] As the anti -wear piston sealing ring of self -adaptation adjustment of the utility model preferably, the tensioning plate is stainless steel material, and the tensioning plate is slidably connected with the movable groove.
[0010] As the anti -wear piston sealing ring of self -adaptation adjustment of the utility model preferably, the tensioning plate and the tensioning spring constitute the elastic telescopic structure.
[0011] As the anti -wear piston sealing ring of self -adaptation adjustment of the utility model preferably, one end of the tensioning spring relative to the tensioning plate is connected with the inner wall of the movable groove, the tensioning spring is provided with a group, and the tensioning spring about the circumference of the flexible metal ring is distributed in a circle.
[0012] Compared with the prior art, the utility model has the advantages of:
[0013] The utility model discloses a flexible metal ring is installed in the inside groove of the internal outer sealing lip, then installs the sealing ring on the piston surface through the installation groove, when the sealing ring on the piston surface reciprocates in the inside cylinder body, when the sealing ring surface wears, the tension spring in the movable groove of flexible metal ring one side stretches, and then drives the tension plate of the other end of tension spring to move, thereby driving the elastic extension of outer sealing lip, thereby the self -adaptation adjustment of sealing ring is carried out, always keeps the sealed connection between piston sealing ring and cylinder body, improves the anti -wear effect of piston sealing ring and the security of piston use. BRIEF DESCRIPTION OF DRAWINGS
[0014] The accompanying drawings are included to provide a further understanding of the present utility model, and constitute a part of the specification, and are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute the limitation to the present utility model. In the drawings:
[0015] Figure 1 It is the whole structure schematic diagram of piston sealing ring of the utility model;
[0016] Figure 2 It is the sectional structure schematic diagram of piston sealing ring of the utility model;
[0017] Figure 3 It is the exploded structure schematic diagram of flexible metal ring of the utility model;
[0018] Figure 4 It is the sectional structure schematic diagram of flexible metal ring of the utility model.
[0019] In the drawing: 1, inner sealing lip; 2, outer sealing lip; 3, installation groove; 4, reserved groove; 5, flexible metal ring; 6, tension plate; 7, tension spring; 8, movable groove. DETAILED DESCRIPTION
[0020] The technical scheme in the embodiments of the present utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the present utility model, and obviously, the described embodiments are only a part of the embodiments of the present utility model, not all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of protection of the present utility model.
[0021] Please refer to Figures 1-4 The utility model provides following technical scheme: the anti -wear piston sealing ring of self -adaptive regulation, including inner sealing lip 1 and the outer sealing lip 2 of connecting in the other end of inner sealing lip 1, and the installation groove 3 that is formed in the surrounding of inner sealing lip 1 and outer sealing lip 2,
[0022] The inner wall of the outer sealing lip 2 is provided with a reserved groove 4, the inner wall of the reserved groove 4 is connected with a flexible metal ring 5, the outer side wall of the flexible metal ring 5 is connected with a tension plate 6, the inner side of the tension plate 6 is connected with a tension spring 7, and the flexible metal ring 5 is close to a movable groove 8 of the tension spring 7.
[0023] Preferably, the flexible metal ring 5 is made of 304 stainless steel, and the flexible metal ring 5 is embeddedly connected with the reserved groove 4.
[0024] Preferably, the tension plate 6 is made of stainless steel, and the tension plate 6 is slidingly connected with the movable groove 8. Specifically, the tension plate 6 is adjusted in extension and contraction in the movable groove 8, so that the tension plate 6 is conveniently moved and adjusted.
[0025] Preferably, the tension plate 6 and the tension spring 7 form an elastic extension structure. Specifically, the elastic structure of the tension plate 6 and the tension spring 7 conveniently drives the piston sealing ring to extend.
[0026] Preferably, one end of the tension spring 7 relative to the tension plate 6 is connected with the inner wall of the movable groove 8, and the tension spring 7 is provided in a group, and the group of tension springs 7 is circumferentially distributed about the center of the flexible metal ring 5. Specifically, the use of the tension spring 7 conveniently drives the outer sealing lip 2 to be tensioned and adjusted, so as to conveniently adapt to the sealing effect of the cylinder.
[0027] Specifically, the flexible metal ring 5 is installed in the reserved groove 4 in the inner part of the outer sealing lip 2, then the sealing ring is installed on the piston surface through the installation groove 3, when the sealing ring on the piston surface reciprocates in the inner part of the cylinder, when the sealing ring surface is worn, the tension spring 7 in the movable groove 8 on one side of the flexible metal ring 5 is stretched, thereby driving the tension plate 6 at the other end of the tension spring 7 to move, so as to drive the outer sealing lip 2 to elastically stretch, so as to self-adaptively adjust the sealing ring, so as to ensure that the piston sealing ring and the cylinder are always in sealing connection, and the anti-wear effect of the piston sealing ring and the safety of the piston in use are improved.
[0028] Finally, it should be pointed out that: the above-mentioned is only the preferred embodiment of the utility model, and is not used for limiting the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical scheme recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. An adaptively adjustable wear-resistant piston seal ring, comprising an inner sealing lip (1) and an outer sealing lip (2) connected to the other end of the inner sealing lip (1), characterized in that: The inner sealing lip (1) and the outer sealing lip (2) together form the mounting groove (3); The inner wall of the outer sealing lip (2) is provided with a reserved groove (4), the inner wall of the reserved groove (4) is connected to a flexible metal ring (5), the outer wall of the flexible metal ring (5) is connected to a tensioning plate (6), the inner side of the tensioning plate (6) is connected to a tensioning spring (7), and the flexible metal ring (5) is close to the movable groove (8) of the tensioning spring (7).
2. The adaptively adjustable anti-wear piston seal ring according to claim 1, characterized in that: The flexible metal ring (5) is made of 304 stainless steel and is fitted into the reserved groove (4).
3. The adaptively adjustable anti-wear piston seal ring according to claim 1, characterized in that: The tensioning plate (6) is made of stainless steel and is slidably connected to the movable groove (8).
4. The adaptively adjustable anti-wear piston seal ring according to claim 1, characterized in that: The tension plate (6) and the tension spring (7) constitute an elastic telescopic structure.
5. The adaptively adjustable anti-wear piston seal ring according to claim 1, characterized in that: One end of the tension spring (7) relative to the tension plate (6) is connected to the inner wall of the movable groove (8). A set of tension springs (7) is provided, and the set of tension springs (7) is circumferentially distributed about the center of the flexible metal ring (5).