Back supporting and lubricating device for piston sealing element
By designing an oil inlet groove, an L-shaped pipe, and a return spring on the back of the piston seal, a one-way valve lubrication device is formed, which solves the problem of insufficient lubrication of the support ring in long-stroke cylinders and improves the lubrication effect and cylinder stability.
Patent Information
- Application Number
- CN202423016070.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-09
AI Technical Summary
The piston length of special long-stroke hydraulic cylinders is relatively long, which leads to a lack of lubrication between the support ring and the cylinder barrel, increasing wear and movement resistance, and affecting the stability of the hydraulic cylinder.
Design a piston seal back support lubrication device, including an oil inlet groove, an L-shaped pipe, a return spring and an abutment ball, forming a one-way valve structure. The hydraulic oil increases in pressure as the piston moves to lubricate the support ring, ensuring lubrication effect and preventing movement resistance.
This improves the service life of the support ring, avoids the resistance creep phenomenon of piston movement, and ensures normal operation and sealing of the hydraulic cylinder.
Smart Images
Figure CN223524402U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to piston sealing piece back surface support lubrication technical field, concretely is a kind of piston sealing piece back surface support lubricating device. BACKGROUND
[0002] Oil cylinder piston is the important component in hydraulic oil cylinder, its performance directly influences the working efficiency and reliability of oil cylinder, usually, the length of oil cylinder piston is about 0.6-1 times of cylinder diameter, but the piston length of part special long-stroke oil cylinder will be longer, usually, sealing element will be installed at both ends of piston, lack of hydraulic oil lubrication between support ring and cylinder barrel, so that piston sealing piece back surface support lubricating device is needed, to ensure the lubrication between support ring and cylinder barrel.
[0003] At present, the piston length of part special long-stroke oil cylinder will be longer than ordinary piston, due to sealing element at both ends of piston, lack of hydraulic oil lubrication between support ring and cylinder barrel, so as to increase the wear of support ring and increase the resistance of piston movement, and crawling phenomenon occurs, which affects the stability of oil cylinder, so that there is limitation in use. SUMMARY
[0004] The utility model discloses a kind of piston sealing piece back surface support lubricating devices, to solve the problem raised in above-mentioned background art.
[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of piston sealing piece back surface support lubricating device, including piston body, the inside one side of the piston body is equipped with oil inlet groove, the inside other side of the piston body is equipped with L type pipeline, one end of the L type pipeline is communicated with one end of the oil inlet groove, the inner wall one side of the L type pipeline is fixedly connected with return spring, one end of the return spring is fixedly connected with abutment ball, the inner wall of the oil inlet groove is clamped with oil inlet pipe, the outer surface of the piston body is equipped with two support grooves, another end of the L type pipeline is communicated with one side of one of the support grooves.
[0006] As further preferred of the technical scheme, the inner wall of two support grooves is clamped with support ring, the inner wall one side of one of the support grooves is communicated with one side of another of the support grooves with connection pipeline.
[0007] As further preferred of the technical scheme, the outer surface of two support rings is equipped with a plurality of oil discharge grooves.
[0008] As further preferred of the technical scheme, the outer surface other side of the piston body is equipped with two sealing grooves, the inner wall of two sealing grooves is clamped with sealing ring.
[0009] The utility model provides a piston sealing piece back face support lubricating device, has the following beneficial effects:
[0010] The utility model discloses a structure design of oil inlet groove, reset spring and abutment ball, makes the inside of piston body form a check valve, when piston body moves in the oil cylinder, the lubrication in the oil cylinder enters into the oil inlet groove, pressurizes in the oil inlet groove, and pressure starts from zero and increases, in its process, a small amount of hydraulic oil reaches the position where the support ring is located through the check valve, reaches the effect of lubrication, when continuously pressurizes, the check valve closes, and the oil cylinder normally works, this structure can reach the effect of lubrication, and can make the oil cylinder normally run, thereby improve the service life of support ring, also avoid the resistance of piston body movement to appear the phenomenon of crawling. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;
[0012] Figure 2 It is the exploded structure schematic diagram of the utility model;
[0013] Figure 3 It is the cross section structure schematic diagram of the utility model;
[0014] Figure 4 It is Figure 3 It is the local enlarged schematic diagram of A area in the middle;
[0015] In the drawing: 1, piston body;2, oil inlet pipe;3, sealing ring;4, support ring;5, support groove;6, sealing groove;7, oil discharge groove;8, abutment ball;9, L type pipeline;10, reset spring;11, connecting pipeline;12, oil inlet groove. DETAILED DESCRIPTION
[0016] The technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment.
[0017] The utility model provides technical scheme: as Figure 1 - Figure 4As shown in the embodiment, the piston sealing back support lubricating device comprises a piston body 1, an oil inlet groove 12 is formed on one side of the inner part of the piston body 1, an L-shaped pipeline 9 is formed on the other side of the inner part of the piston body 1, one end of the L-shaped pipeline 9 is in through communication with one end of the oil inlet groove 12, a return spring 10 is fixedly connected to one side of the inner wall of the L-shaped pipeline 9, one end of the return spring 10 is fixedly connected to an abutting ball 8, an oil inlet pipe 2 is clamped to the inner wall of the oil inlet groove 12, two support grooves 5 are formed on the outer surface of the piston body 1, the other end of the L-shaped pipeline 9 is in through communication with one side of one of the support grooves 5, through the structural design of the oil inlet groove 12, the return spring 10 and the abutting ball 8, a one-way valve is formed in the inner part of the piston body 1, when the piston body 1 moves in the oil cylinder, the lubricating oil in the oil cylinder enters the oil inlet groove 12, the oil inlet groove 12 is pressurized, the pressure starts from zero and increases, in the process, a small amount of hydraulic oil reaches the position of the support ring 4 through the one-way valve, and the lubricating effect is achieved, when the pressure continues to increase, the one-way valve is closed, and the oil cylinder normally works, the structure can not only achieve the lubricating effect, but also enable the oil cylinder to normally work, thereby prolonging the service life of the support ring 4 and avoiding the crawling phenomenon of the movement resistance of the piston body 1, wherein the elastic force of the return spring 10 is about 0.1MPa.
[0018] As Figure 3 and Figure 4 shown, the inner walls of the two support grooves 5 are clamped with support rings 4, one side of the inner wall of one of the support grooves 5 is provided with a connecting pipeline 11 in through communication with one side of the other support groove 5, through the structural design of the connecting pipeline 11, part of the lubricating oil entering one of the support grooves 5 can enter the other support groove 5 through the connecting pipeline 11, so that the two support rings 4 can be lubricated, and the service life of the support ring 4 is improved.
[0019] As Figure 2 shown, the outer surfaces of the two support rings 4 are provided with a plurality of oil discharge grooves 7, through the structural design of the oil discharge grooves 7, the lubricating oil in the support grooves 5 is quickly discharged from the support grooves 5, and the lubrication between the support ring 4 and the cylinder barrel is improved.
[0020] As Figure 1 - Figure 3 shown, the other side of the outer surface of the piston body 1 is provided with two sealing grooves 6, the inner walls of the two sealing grooves 6 are clamped with sealing rings 3, through the structural design of the sealing ring 3, the sealing property between the piston body 1 and the cylinder barrel of the oil cylinder is ensured, and the normal working pressure and performance of the oil cylinder are maintained.
[0021] The utility model provides a kind of piston sealing back support lubricating device, specific working principle is as follows:
[0022] When the piston body 1 is installed in the oil cylinder, when the piston body 1 moves in the oil cylinder, the lubrication in the oil cylinder enters into the oil inlet groove 12, pressurizes the oil inlet groove 12, the pressure starts from zero and increases, in the process, a small amount of hydraulic oil reaches the position of one of the support rings 4 through the L-shaped pipeline 9, part of the lubricating oil reaches the position of the other support ring 4 through the connecting pipeline 11, and the effect of lubricating between the support ring 4 and the cylinder barrel is achieved, when the pressure continues to increase, the abutting ball 8 abuts on one end of the L-shaped pipeline 9, and the L-shaped pipeline 9 is sealed, and the oil cylinder is normally used.
[0023] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A piston seal back-up lubrication device comprising a piston body (1) characterised in that: The inside of the piston body (1) is provided with an oil inlet groove (12), and the other side of the inside of the piston body (1) is provided with an L-shaped pipeline (9), one end of the L-shaped pipeline (9) is in communication with one end of the oil inlet groove (12), the inner wall of the L-shaped pipeline (9) is fixedly connected with a reset spring (10), one end of the reset spring (10) is fixedly connected with an abutting ball (8), the inner wall of the oil inlet groove (12) is clamped with an oil inlet pipe (2), the outer surface of the piston body (1) is provided with two support grooves (5), the other end of the L-shaped pipeline (9) is in communication with one side of one of the support grooves (5).
2. A piston seal back-up lubrication device as claimed in claim 1, characterised in that: The inner walls of the two support grooves (5) are clamped with support rings (4), and the inner wall of one of the support grooves (5) is provided with a connecting pipeline (11) penetrating on one side.
3. A piston seal back-up lubrication device as claimed in claim 2, characterised in that: The outer surfaces of the two support rings (4) are provided with a plurality of oil discharge grooves (7).
4. A piston seal back-up lubrication device as claimed in claim 1, wherein: The other side of the outer surface of the piston body (1) is provided with two sealing grooves (6), and the inner walls of the two sealing grooves (6) are clamped with sealing rings (3).