V-shaped combined sealing element

Abstract

The utility model relates to a V-shaped combined sealing element in the technical field of V-shaped sealing elements. A cylinder body used for limiting the sealing piece is installed outside the sealing piece, an end cover used for limiting the sealing piece is installed at one end of the cylinder body, a piston rod used for being matched with the sealing piece to prevent hydraulic oil from leaking is installed inside the cylinder body, and the sealing piece comprises a pressing ring and a supporting ring. The pressing ring and the supporting ring are arranged at the two ends of the sealing piece, an oil cavity used for storing hydraulic oil is formed in the cylinder body, and the piston rod stretches out and draws back in a hole cavity of the oil cavity. Through the arrangement of an elastic plate, when the piston rod slides towards the outside of the cylinder body, a high-temperature-resistant sealing ring and a V-shaped sealing ring extrude each other, one end of a second convex end extrudes the elastic plate to drive a first ring body to expand, the two sides of the high-temperature-resistant sealing ring are tightly attached to the inner wall of the piston rod, and hydraulic oil is blocked; and leakage of hydraulic oil is avoided, and effective protection is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of V-shaped sealing pieces, in particular to a V-shaped combined sealing piece. Background Art

[0002] Hydraulic press is an indispensable pressing process equipment in industrial production, suitable for pressing and forming plastic materials. With the increasing demand of users for pressed workpieces.

[0003] Since the seal between the cylinder body and the bottom of the cylinder in the hydraulic press is a static seal, a higher pressure will be generated during the operation of the piston rod driving the plunger, while conventional seals can only withstand pressures of 40MPa and below. The piston rod is a connecting component that supports the piston to do work, and is mostly used in oil cylinders and cylinder motion actuators. It is a moving component that moves frequently and has high technical requirements. The V-shaped sealing ring is a common structure of existing piston rod seals. When the piston rod is operating for a long time, the V-shaped sealing ring is prone to wear and even impact damage, resulting in sealing failure. Utility Model Content

[0004] In order to solve the problem of poor sealing performance mentioned in the above background technology, the utility model provides the following technical solutions:

[0005] A V-shaped combined seal comprises a seal;

[0006] A cylinder body for limiting the position of the sealing member is installed outside the sealing member.

[0007] An end cover for limiting the seal is installed at one end of the cylinder body, and the seal cover is also used to block the hydraulic oil. The end cover, the seal and the piston rod cooperate with each other to prevent leakage of the hydraulic oil. A piston rod for cooperating with the seal to prevent leakage of the hydraulic oil is installed inside the cylinder body.

[0008] The sealing member comprises a pressure ring and a support ring, and the pressure ring and the support ring are arranged at two ends of the sealing member.

[0009] A plurality of high temperature resistant sealing rings are installed between the pressure ring and the support ring, a V-shaped sealing ring for sealing in cooperation with the high temperature resistant sealing ring is installed on one side of each high temperature resistant sealing ring, and the high temperature resistant sealing rings and the V-shaped sealing rings are staggered.

[0010] Furthermore, an oil chamber for storing hydraulic oil is provided inside the cylinder body, and the piston rod is extended and retracted in the hole of the oil chamber.

[0011] Furthermore, an earring is installed at one end of the piston rod to facilitate connection with an external structure.

[0012] Furthermore, a plurality of bolts for locking the end cover in cooperation with the cylinder body are installed on the edge of the end cover, and the end cover is fixed to one side of the cylinder body by the setting of the bolts. A dustproof ring for dust prevention is provided at one end of the end cover, and an annular groove for limiting the seal is provided on the middle inner wall of the end cover.

[0013] Furthermore, the high temperature resistant sealing ring includes a ring body, a convex end is provided on one side of the ring body, an arc-shaped groove is provided on the other side of the ring body, and an elastic plate is installed on one side of the arc-shaped groove to facilitate the control of the ring body and the side wall of the annular groove to be tightly pressed.

[0014] Furthermore, the V-shaped sealing ring includes a second ring body, a second convex end is provided on one side of the second ring body facing the arc-shaped groove, and a second concave end is provided on the other side of the second ring body.

[0015] Furthermore, the pressure ring is made of thermoplastic polyurethane elastomer rubber. The setting of the thermoplastic polyurethane elastomer rubber enables the pressure ring to maintain good elasticity and wear resistance, and the thermoplastic polyurethane elastomer rubber has outstanding load-bearing capacity, impact resistance and shock absorption performance. It is also oil-resistant and can effectively block hydraulic oil.

[0016] The high temperature resistant sealing ring is made of polytetrafluoroethylene, which improves the wear resistance of the high temperature resistant sealing ring, reduces the wear of the high temperature resistant sealing ring, reduces the maintenance cost, and also improves the corrosion resistance, anti-adhesion and high temperature resistance of the high temperature resistant sealing ring;

[0017] The support ring is made of thermoplastic elastomer, so that the support ring has high elasticity and is easy to bend, and the support ring is not easy to break during long-term use.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] Through the setting of the elastic plate, when the piston rod slides to the outside of the cylinder body, the high-temperature resistant sealing ring and the V-shaped sealing ring squeeze each other, and one end of the convex end 2 squeezes the elastic plate to drive the ring body 1 to expand, so that the two sides of the high-temperature resistant sealing ring and the inner wall of the piston rod are tightly attached to block the hydraulic oil, avoid leakage of the hydraulic oil, and provide effective protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the installation of the combined seal of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the combined seal of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the high temperature resistant sealing ring of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the V-shaped sealing ring of the utility model.

[0024] In the accompanying drawings, the names of the components represented by the reference numerals are listed as follows:

[0025] 100-cylinder body, 110-oil chamber, 120-piston rod, 121-earring, 130-end cover, 131-bolt, 132-dust ring, 133-annular groove;

[0026] 200-seal, 210-pressure ring, 220-high temperature resistant sealing ring, 221-ring body one, 222-convex end one, 223-arc-shaped groove, 224-elastic plate, 230-V-shaped sealing ring, 231-ring body two, 232-convex end two, 233-concave end, 240-support ring. DETAILED DESCRIPTION

[0027] The preferred specific implementation methods for implementing the present utility model are described in detail below, and a clear and complete description is made in conjunction with the accompanying drawings.

[0028] See also Figure 1-Figure 4 The utility model provides a V-shaped combined seal, including a seal 200, and through the setting of the elastic plate 224, when the piston rod 120 slides to the outside of the cylinder body 100, the high temperature resistant sealing ring 220 and the V-shaped sealing ring 230 are squeezed against each other, and one end of the convex end 232 squeezes the elastic plate 224 to drive the ring body 121 to expand, so that the two sides of the high temperature resistant sealing ring 220 and the inner wall of the piston rod 120 are tightly attached to block the hydraulic oil and prevent the hydraulic oil from leaking, thereby providing effective protection.

[0029] The cylinder body 100 for limiting the seal 200 is installed outside the seal 200. The seal 200 is arranged in the annular groove cavity of the bolt 131, and the end cover 130 is fixed to one side of the cylinder body 100 by the bolt 131. The cylinder body 100 is provided with an oil chamber 110 for storing hydraulic oil inside, and one end of the piston rod 120 is extended and retracted in the hole cavity of the oil chamber 110. When the piston rod 120 is extended and retracted in the hole cavity of the oil chamber 110, the outer wall of the piston rod 120 is easy to be adhered to by hydraulic oil. When the piston rod 120 moves to the outside of the cylinder body 100, the hydraulic oil adhered to the piston rod 120 is blocked by the seal 200 to prevent the hydraulic oil from leaking.

[0030] A piston rod 120 is installed inside the cylinder body 100 to cooperate with a seal 200 to prevent hydraulic oil leakage, and the inner side of the seal 200 is tightly fitted with the outer wall of the piston rod 120. The seal 200 is in the groove cavity of the annular groove 133, and an earring 121 is fixedly installed at one end of the piston rod 120.

[0031] An end cover 130 for limiting the seal 200 is installed at one end of the cylinder body 100, and the end cover 130 is also used to seal the oil chamber 110. A plurality of bolts 131 for locking the end cover 130 in cooperation with the cylinder body 100 are installed on the edge of the end cover 130. A plurality of threaded holes are opened on one side of the cylinder body 100 facing the end cover 130. When installing the end cover 130, the bolts 131 are aligned with the threaded holes, and the bolts 131 are rotated to fix the end cover 130 on one side of the cylinder body 100.

[0032] One end of the end cover 130 is sleeved with a dustproof ring 132 for dust prevention, the middle of the end cover 130 is provided with a cavity for the piston rod 120 to extend and retract, and the inner wall of the middle cavity of the end cover 130 is provided with an annular groove 133 for limiting the seal 200.

[0033] The seal 200 includes a pressure ring 210, which is made of thermoplastic polyurethane elastomer rubber. The setting of the thermoplastic polyurethane elastomer rubber allows the pressure ring to maintain good elasticity and wear resistance, and the thermoplastic polyurethane elastomer rubber has outstanding bearing capacity, impact resistance and shock absorption performance. It is also oil-resistant and can effectively block the hydraulic oil. A high-temperature resistant sealing ring 220 is installed in the middle of the seal 200. The high-temperature resistant sealing ring 220 is made of polytetrafluoroethylene, which improves the wear resistance of the high-temperature resistant sealing ring, reduces equipment wear, and reduces maintenance costs. At the same time, it also improves the corrosion resistance, anti-adhesion and high-temperature resistance of the high-temperature resistant sealing ring. The high-temperature resistant sealing ring 220 includes a ring body 221, a convex end 222 is provided on one side of the ring body 221, and an arc groove 223 is provided on the other side of the ring body 221. An elastic plate 224 is installed on one side of the arc groove 223 to facilitate the control of the ring body 221 and the side wall of the annular groove 133 to press tightly.

[0034] The seal 200 includes a support ring 240, which is made of a thermoplastic elastomer, so that the support ring 240 has high elasticity and is easy to bend, so that the support ring 240 is not easy to break during long-term use, and the pressure ring 210 and the support ring 240 are arranged at both ends of the seal 200, and a V-shaped sealing ring 230 for sealing with the high-temperature resistant sealing ring 220 is installed on one side of the high-temperature resistant sealing ring 220, and the high-temperature resistant sealing ring 220 and the V-shaped sealing ring 230 are staggered. The V-shaped sealing ring 230 includes a ring body 231, and a convex end 232 is provided on one side of the ring body 231 facing the arc-shaped groove 223, and a concave end 233 is provided on the other side of the ring body 231. When the piston rod 120 slides, the concave end 233 and the convex end 222 are in contact with each other, and the convex end 232 moves in the direction of the arc-shaped groove 223, driving the elastic plate 224 to deform, so that the two ends of the ring body 221 expand outward, so that the outer wall of the ring body 221 and the piston rod 120 are more closely fitted.

[0035] Based on the above content and the accompanying drawings, those skilled in the art can understand and implement the utility model. In addition, any non-creative modifications made to the utility model by those skilled in the art without making creative work still fall within the scope of protection of the utility model.

Claims

1. A V-shaped combined seal, comprising a seal (200), characterized in that: A cylinder body (100) for limiting the position of the sealing member (200) is installed outside the sealing member (200); An end cover (130) for limiting the position of the seal (200) is installed at one end of the cylinder body (100), and a piston rod (120) for cooperating with the seal (200) to prevent leakage of hydraulic oil is installed inside the cylinder body (100); The sealing member (200) comprises a pressure ring (210) and a support ring (240), and the pressure ring (210) and the support ring (240) are arranged at two ends of the sealing member (200); A plurality of high temperature resistant sealing rings (220) are installed between the pressure ring (210) and the support ring (240), and a V-shaped sealing ring (230) for cooperating with the high temperature resistant sealing ring (220) for sealing is installed on one side of each high temperature resistant sealing ring (220), and the high temperature resistant sealing rings (220) and the V-shaped sealing rings (230) are arranged in a staggered manner.

2. A V-shaped combined seal according to claim 1, characterized in that: An oil chamber (110) for storing hydraulic oil is provided inside the cylinder body (100), and the piston rod (120) is extended and retracted in the bore of the oil chamber (110).

3. A V-shaped combined seal according to claim 1, characterized in that: An earring (121) is installed at one end of the piston rod (120).

4. A V-shaped combined seal according to claim 1, characterized in that: Bolts (131) for locking the end cover (130) in cooperation with the cylinder body (100) are installed on the edge of the end cover (130); a dustproof ring (132) for preventing dust is sleeved on one end of the end cover (130); and an annular groove (133) for limiting the seal (200) is provided on the inner wall of the middle part of the end cover (130).

5. A V-shaped combined seal according to claim 4, characterized in that: The high temperature resistant sealing ring (220) comprises a ring body (221), one side of the ring body (221) is provided with a protruding end (222), the other side of the ring body (221) is provided with an arc-shaped groove (223), and one side of the arc-shaped groove (223) is installed with an elastic plate (224) for controlling the side wall of the ring body (221) and the annular groove (133) to be pressed against each other.

6. A V-shaped combined seal according to claim 5, characterized in that: The V-shaped sealing ring (230) comprises a second ring body (231), a second convex end (232) is provided on one side of the second ring body (231) facing the arc-shaped groove (223), and a concave end (233) is provided on the other side of the second ring body (231).

7. A V-shaped combined seal according to claim 5, characterized in that: The pressure ring (210) is made of thermoplastic polyurethane elastomer rubber, the high temperature resistant sealing ring (220) is made of polytetrafluoroethylene, and the support ring (240) is made of thermoplastic elastomer.

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