Sealing element of piston rod
By designing oil pots and lubricating oil delivery systems in piston rod seals, the problem of lack of lubrication after long-term use of seals under high pressure is solved, and effective lubrication of seal strips and extended service life is achieved.
Patent Information
- Application Number
- CN202323619756.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2033-12-28
AI Technical Summary
After the existing piston rod seal is used for a long time under high pressure, there is a lack of lubrication between the seal and the piston rod, resulting in wear of the seal strip and reducing the service life of the piston rod.
A piston rod seal is designed. By installing an oil pot on the top of the hydraulic cylinder, using the cooperation of the extrusion block and the roller, the arc-shaped plate is driven to contact the oil injection pipe through the spring, so that the lubricating oil flows into the oil injection pipe through the round hole and passes through the balls. To achieve stable oil output, the lubricating oil falls to the sealing strip through the design of the curved plate, increasing the lubricating effect.
It extends the service life of the sealing strip and improves the sealing and service life of the piston rod seal.
Smart Images
Figure CN222436726U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of piston rod sealing, in particular to a sealing element for a piston rod. Background Art
[0002] The hydraulic cylinder consists of: cylinder barrel, piston rod (cylinder rod), piston, and end cover. The quality of its processing directly affects the life and reliability of the entire product. The piston rod processing requirements are high, and its surface roughness requirement is Ra0.4~0.8um, and strict requirements are placed on coaxiality and wear resistance. The basic feature of the cylinder rod is the processing of a slender shaft, which is difficult to process and has always troubled the processing personnel. The piston rod is mainly used for hydraulic pneumatics, engineering machinery, and automobile manufacturing piston rods, guide columns for plastic machinery, rollers for packaging machinery and printing machinery, textile machinery, and the axis of conveying machinery, and linear optical axes for linear motion.
[0003] When the hydraulic cylinder works under high pressure, in order to maintain the sealing, a sealing ring is added to the piston rod for sealing to prevent oil from overflowing. At present, in the existing technology, a sealing ring is installed on the outside of the piston. This operation is convenient and quick, but there is no lubrication between the piston rod and the seal when working under high pressure for a long time. The piston rod will wear out if used for too long, thereby reducing the service life of the piston rod.
[0004] Therefore, it is particularly important to improve the existing piston rod seal and design a new piston rod seal to solve the above technical defects and improve the practicality of the overall piston rod seal. Utility Model Content
[0005] The purpose of the utility model is to provide a sealing element for a piston rod to solve the problems raised in the above background technology.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A piston rod seal comprises a hydraulic cylinder, wherein a piston rod is installed inside the hydraulic cylinder, a first sealing sleeve is installed outside the piston rod, a second sealing sleeve is installed outside the first sealing sleeve, a groove is provided inside the second sealing sleeve, an extrusion block is installed inside the groove, sealing strips are installed on both the front and rear sides of the groove, an oil pot is installed on the top of the hydraulic cylinder, an oil filling pipe is installed on the bottom end of the inner side of the oil pot, a roller is installed below the oil pot, and a spring is installed between the roller and the oil pot.
[0008] As a preferred solution of the utility model, an arc plate is installed on the top of the roller, and extension plates are installed on the left and right sides of the arc plate. The spring is fixedly connected to the bottom of the oil pot through the extension plate.
[0009] As a preferred solution of the utility model, a rotating shaft is installed inside the roller, and the left and right ends of the rotating shaft extend to the bottom of the extension plate, and the connection between the extension plate and the left and right ends of the rotating shaft is a fixed connection.
[0010] As a preferred solution of the utility model, the oil filling tube extends to the bottom of the oil pot, a ball is installed at the bottom end of the inner side of the oil filling tube, a cover plate is installed on the top of the oil filling tube, and a circular hole is opened at the top of the oil filling tube, and the circular hole is interconnected with the interior of the oil filling tube.
[0011] As a preferred solution of the utility model, the oil pot extends to the inside of the hydraulic cylinder, a cover is installed on the top of the oil pot, anti-slip grooves are provided on the outside of the cover, and the bottom weight of the oil filling pipe is greater than the top of the oil filling pipe.
[0012] As a preferred solution of the utility model, an elastic ball is installed on the inner circumferential wall of the first sealing sleeve, and the elastic ball is designed as a hemispherical structure.
[0013] As a preferred solution of the utility model, a clamping block is symmetrically provided on the outside of the first sealing sleeve, and a clamping groove is provided on the inner circumferential wall of the second sealing sleeve at a position corresponding to the clamping block, and the clamping groove is adapted for use with the clamping block.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] In the utility model, the clamping block is clamped inside the clamping groove, so that the first sealing sleeve and the second sealing sleeve are fixed to improve the sealing performance; the first sealing sleeve is arranged on the outside of the piston rod, so that the piston rod squeezes the elastic ball to improve the sealing performance; after a long time, when the second sealing sleeve rubs against the inner wall of the hydraulic cylinder for a long time and lacks lubrication and causes wear to the sealing strip, the oil pot is opened, the inside of the oil pot is filled with lubricating oil, and the squeezing is performed by the squeezing block and the roller, thereby squeezing by the spring, so that the arc plate contacts the oil filling pipe, and the lubricating oil flows into the inside of the oil filling pipe through the circular hole, so that the lubricating oil can be stably discharged through the ball, and the arc-shaped design of the arc plate allows the lubricating oil to fall by gravity and flow to the sealing strip, thereby increasing the lubrication effect and extending the service life of the sealing strip. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the internal structure of the first sealing sleeve and the second sealing sleeve of the utility model;
[0018] Figure 3 The utility model is a schematic diagram of the internal structure of the oil pot.
[0019] In the figure: 1, hydraulic cylinder; 2, piston rod; 3, first sealing sleeve; 301, elastic ball; 302, clamping block; 4, second sealing sleeve; 401, clamping groove; 5, groove; 501, extrusion block; 6, sealing strip; 7, oil pot; 701, oil filling pipe; 702, roller; 703, spring; 704, arc plate; 705, extension plate; 706, rotating shaft. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0021] Example:
[0022] See also Figure 1-Figure 3 , the utility model provides a technical solution:
[0023] A piston rod seal comprises a hydraulic cylinder 1, wherein a piston rod 2 is installed inside the hydraulic cylinder 1, a first sealing sleeve 3 is installed outside the piston rod 2, a second sealing sleeve 4 is installed outside the first sealing sleeve 3, a groove 5 is provided inside the second sealing sleeve 4, an extrusion block 501 is installed inside the groove 5, sealing strips 6 are installed on both the front and rear sides of the groove 5, an oil pot 7 is installed on the top of the hydraulic cylinder 1, an oil filling pipe 701 is installed at the bottom end of the inner side of the oil pot 7, a roller 702 is installed below the oil pot 7, a spring 703 is installed between the roller 702 and the oil pot 7, when the second sealing sleeve 4 rubs against the inner wall of the hydraulic cylinder 1 for a long time, the sealing strip 6 will be worn due to lack of lubrication, by opening the oil pot 7, filling the inside of the oil pot 7 with lubricating oil, extruding the extrusion block 501 and the roller 702, and then extruding the spring 703, so that the oil pot 7 contacts the oil filling pipe 701, so that the lubricating oil flows out and finally flows to the sealing strip 6, thereby increasing the lubrication effect and extending the service life of the sealing strip 6.
[0024] For further information, see Figure 1 and Figure 2 In this embodiment, an arc plate 704 is installed on the top of the roller 702, and extension plates 705 are installed on the left and right sides of the arc plate 704. The spring 703 is fixedly connected to the bottom of the oil pot 7 through the extension plate 705. The spring 703 can be fixed between the bottom of the oil pot 7 and the extension plate 705 through the extension plate 705, so that the extension plate 705 is driven to rise by the expansion and contraction of the spring 703. Through the arc design of the arc plate 704, the lubricating oil falls by gravity.
[0025] Among them, see Figure 1 and Figure 2 In this embodiment, a rotating shaft 706 is installed inside the roller 702, and the left and right ends of the rotating shaft 706 extend to the bottom of the extension plate 705. The connection between the extension plate 705 and the left and right ends of the rotating shaft 706 is a fixed connection. The rotating shaft 706 allows the roller 702 to rotate, so that the sealing strip 6 can move more smoothly during translation.
[0026] Second, see Figure 1 and Figure 2 In this embodiment, the oil filling tube 701 extends to the bottom of the oil pot 7, a ball is installed at the bottom end of the inner side of the oil filling tube 701, a cover is installed on the top of the oil filling tube 701, and a circular hole is opened at the top of the oil filling tube 701. The circular hole and the interior of the oil filling tube 701 are interconnected. When the oil filling tube 701 is lifted up, the lubricating oil flows into the interior of the oil filling tube 701 through the circular hole, and contacts with the ball through the arc plate 704, so that the lubricating oil can be stably discharged.
[0027] Furthermore, please see Figure 1 and Figure 2 In the present embodiment, the oil pot 7 extends to the interior of the hydraulic cylinder 1, a cover is installed on the top of the oil pot 7, and anti-slip grooves are provided on the outside of the cover. The bottom weight of the oil filling pipe 701 is greater than the top of the oil filling pipe 701. Since the bottom end of the oil filling pipe 701 is too heavy, the oil filling pipe 701 will automatically slide to the bottom end of the inner side of the oil pot 7 when there is no contact, and the cover is used to seal to prevent the lubricating oil from flowing out of the gap.
[0028] For further information, see Figure 1 and Figure 2 In this embodiment, an elastic ball 301 is installed on the inner circumferential wall of the first sealing sleeve 3. The elastic ball 301 is designed to be a hemispherical structure. By sleeved the first sealing sleeve 3 on the outside of the piston rod 2, the piston rod 2 squeezes the elastic ball 301 to improve the sealing performance.
[0029] Finally, see Figure 1 and Figure 2 In this embodiment, a clamping block 302 is symmetrically provided on the outside of the first sealing sleeve 3, and a clamping groove 401 is provided on the inner circumferential wall of the second sealing sleeve 4 at a position corresponding to the clamping block 302. The clamping groove 401 is adapted to be used with the clamping block 302. By clamping the clamping block 302 in the inside of the clamping groove 401, the first sealing sleeve 3 and the second sealing sleeve 4 are fixed, thereby further improving the sealing performance.
[0030] In this embodiment, the implementation scenario is specifically as follows: by clamping the clamping block 302 inside the clamping groove 401, the first sealing sleeve 3 and the second sealing sleeve 4 are fixed to improve the sealing performance; by arranging the first sealing sleeve 3 on the outside of the piston rod 2, the piston rod 2 squeezes the elastic ball 301 to improve the sealing performance; after a long time, the second sealing sleeve 4 rubs against the inner wall of the hydraulic cylinder 1 for a long time, and the lack of lubrication will cause wear to the sealing strip 6, by opening the oil pot 7, the inside of the oil pot 7 is filled with lubricating oil, and the squeezing block 501 and the roller 702 are squeezed, thereby squeezing through the spring 703, so that the arc plate 705 contacts the oil filling pipe 701, and the lubricating oil flows into the inside of the oil filling pipe 701 through the circular hole, so that the lubricating oil is stably discharged through the ball, and the arc-shaped design of the arc plate 704 allows the lubricating oil to fall by gravity and flow to the sealing strip 6, thereby increasing the lubrication effect and extending the service life of the sealing strip 6.
[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A piston rod seal, comprising a hydraulic cylinder (1), characterized in that: A piston rod (2) is installed inside the hydraulic cylinder (1), a first sealing sleeve (3) is installed outside the piston rod (2), a second sealing sleeve (4) is installed outside the first sealing sleeve (3), a groove (5) is provided inside the second sealing sleeve (4), an extrusion block (501) is installed inside the groove (5), sealing strips (6) are installed on both the front and rear sides of the groove (5), an oil pot (7) is installed on the top of the hydraulic cylinder (1), an oil filling pipe (701) is installed at the bottom end of the inner side of the oil pot (7), a roller (702) is installed below the oil pot (7), and a spring (703) is installed between the roller (702) and the oil pot (7).
2. A piston rod seal according to claim 1, characterized in that: An arc-shaped plate (704) is installed on the top of the roller (702), and extension plates (705) are installed on both the left and right sides of the arc-shaped plate (704). The spring (703) is fixedly connected to the bottom of the oil pot (7) through the extension plates (705).
3. A piston rod seal according to claim 1, characterized in that: A rotating shaft (706) is installed inside the roller (702), and both left and right ends of the rotating shaft (706) extend to the bottom of the extension plate (705), and the connection between the extension plate (705) and the left and right ends of the rotating shaft (706) is a fixed connection.
4. A piston rod seal according to claim 1, characterized in that: The oil filling pipe (701) extends to the bottom of the oil pot (7), a ball is installed at the bottom end of the inner side of the oil filling pipe (701), a cover plate is installed at the top of the oil filling pipe (701), and a circular hole is opened at the top end of the oil filling pipe (701), and the circular hole and the inside of the oil filling pipe (701) are interconnected.
5. A piston rod seal according to claim 1, characterized in that: The oil pot (7) extends to the interior of the hydraulic cylinder (1), a cover is installed on the top of the oil pot (7), and anti-slip grooves are provided on the outside of the cover. The bottom of the oil filling pipe (701) is heavier than the top of the oil filling pipe (701).
6. A piston rod seal according to claim 1, characterized in that: An elastic ball (301) is installed on the inner circumferential wall of the first sealing sleeve (3), and the elastic ball (301) is designed to be a hemispherical structure.
7. A piston rod seal according to claim 6, characterized in that: A clamping block (302) is symmetrically provided on the outside of the first sealing sleeve (3), and a clamping groove (401) is provided on the inner circumferential wall of the second sealing sleeve (4) at a position corresponding to the clamping block (302), and the clamping groove (401) is adapted for use with the clamping block (302).