Jack oil cylinder guide sleeve combined static seal

Abstract

The utility model relates to the technical field of oil cylinder sealing pieces, in particular to a jack oil cylinder guide sleeve combined static seal which comprises a supporting ring, a sealing body and an elastic body. A V-shaped groove is formed in the side wall face of the supporting ring, one side of the sealing body is of a conical structure, and a U-shaped groove is formed in the other side of the sealing body. The conical structure of the sealing body is attached to the V-shaped groove of the supporting ring. The elastic body is embedded into the U-shaped groove of the sealing body in an interference fit mode. The utility model has the advantages that the cylinder is not easy to twist and damage by the cylinder wall during installation, is not easy to extrude and damage under high pressure, and has sealing stress compensation.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinder seals, in particular to a jack oil cylinder guide sleeve combined static seal. Background Art

[0002] Jack cylinders are primarily used in hydraulic support equipment for fully mechanized mining in coal mines. Their components include guide sleeves, pistons, piston rods, cylinder barrels, seals, and hydraulic valves. Seals are crucial for the stable operation of jack cylinders. Typically, the piston and guide sleeve are each equipped with a specific number of guide rings, piston seals, tie rod seals, dust seals, and static seals. Static seals are further categorized as guide sleeve static seals and piston rod static seals, depending on their assembly position. The guide sleeve static seal prevents hydraulic oil from escaping through the clearance between the guide sleeve and cylinder barrel when the jack cylinder is pressurized, thus preventing pressure relief and hydraulic oil leakage.

[0003] There are many types of existing guide sleeve static seals, such as bud-shaped rings, Y-shaped rings, or a combination of O-rings and retaining rings. In actual engineering applications, guide sleeve static seals generally have problems such as being easily damaged by cylinder wall distortion during installation, easily extruded under high pressure, and seal stress reduction under long-term pressure. Therefore, the static seal of the jack cylinder still needs to be continuously improved to adapt to more complex operating conditions. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a jack oil cylinder guide sleeve combined static seal.

[0005] The utility model adopts the following technical solution: a jack cylinder guide sleeve combined static seal, comprising a support ring, a sealing body and an elastomer; the side wall of the support ring is provided with a V-shaped groove, one side of the sealing body is a tapered structure and the other side is provided with a U-shaped groove; the tapered structure of the sealing body fits in the V-shaped groove of the support ring; the elastomer is interference fit and embedded in the U-shaped groove of the sealing body.

[0006] Furthermore, the support ring is a polyformaldehyde support ring, and the support ring has an inclined opening.

[0007] Furthermore, the seal is a polyurethane sealing ring, annular lines are distributed on the surface of the sealing body, and sealing lips are respectively provided on the upper and lower sides of the sealing body, and the left side of the sealing lip is lower and the right side is higher.

[0008] Furthermore, the elastomer is a nitrile rubber O-ring, and the elastomer has a frosted surface.

[0009] In summary, the present invention has the following beneficial effects:

[0010] 1. The utility model can avoid excessive extrusion and damage caused by lateral load and torque when the guide sleeve is installed in the cylinder, and the installation damage rate is low.

[0011] 2. The utility model can avoid distortion and extrusion after being subjected to the pressure of the cylinder, and has the initial pressing force and elastic compensation ability, and has a good sealing and durable use effect.

[0012] 3. The utility model is rich in the aesthetic feeling of the product, and the operator can judge whether the sealing surface is damaged by observing whether there are staggered marks between the annular lines, and the sealing performance is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the utility model.

[0014] Figure 2 This is a schematic diagram of the cross-sectional structure of the support ring of the utility model.

[0015] Figure 3 This is a schematic diagram of the cross-sectional structure of the sealing body of the present invention.

[0016] The markings in the accompanying drawings are: 1. support ring; 11. V-shaped groove; 12. inclined opening; 2. sealing body; 21. conical structure; 22. inside of the U-shaped groove; 23. sealing lip; 3. elastomer. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the technical solutions in the specific implementation methods of the present invention are clearly and completely described below to further illustrate the present invention. Obviously, the specific implementation methods described are only part of the implementation methods of the present invention, rather than all styles.

[0018] See Figure 1 、 Figure 2 and Figure 3The cam 21 is provided with a V-shaped groove 11 on the side wall of the support ring 1, and the sealing body 2 is provided with a conical structure 21 on one side and a U-shaped groove 22 on the other side. The conical structure 21 of the sealing body 2 fits in with the V-shaped groove 11 of the support ring 1. The elastic body 3 is interference fit and embedded in the U-shaped groove 22 of the sealing body 2. In a specific implementation, when the guide sleeve is installed in the cylinder, the support ring 1 can prevent the sealing body 2 from being excessively squeezed and damaged by lateral load and torque, thereby reducing the installation damage rate. The sealing body 2 can fill the fitting gap between the guide sleeve and the cylinder and play a main sealing role. The conical structure 21 fits tightly with the V-shaped groove 11, which can prevent the sealing body 2 from being twisted and extruded after being pressed by the cylinder, thereby increasing the sealing effect. The elastomer 3 can provide the sealing body 2 with initial pressing force and elastic compensation, thereby improving the durable use effect of the seal.

[0019] It should be noted that when installing the jack cylinder guide sleeve combined static seal, first, press the elastomer 3 completely into the U-shaped groove 22 of the sealing body 2, then clamp the support ring 1 in the corresponding groove of the guide sleeve, and the V-shaped groove 11 of the support ring 1 needs to face the pressure direction of the cylinder barrel. Then, the sealing body 2 is sleeved in the corresponding groove of the guide sleeve, and the position of the sealing body 2 in the groove is adjusted so that its conical structure 21 fits tightly with the V-shaped groove 11 of the support ring 1, and the U-shaped groove 22 of the sealing body 2 needs to face the pressure direction of the cylinder barrel.

[0020] The support ring 1 is a polyoxymethylene support ring, and the support ring 1 has an inclined opening 12. In a specific implementation, the inclined opening 12 of the support ring 1 can facilitate installation.

[0021] The sealing body 2 is a polyurethane sealing ring, and annular lines are distributed on the surface of the sealing body 2. Sealing lips 23 are respectively provided on the upper and lower sides of the sealing body 2. The left side of the sealing lip 23 is lower and the right side is higher. In a specific implementation, the annular lines distributed on the surface of the sealing body 2 can play a decorative role, increase the beauty of the workpiece, and enable the operator to judge whether there is damage on the surface of the sealing body 2 by observing whether there are staggered marks between the annular lines, thereby increasing the practicality of the seal; the design of the sealing lip 23 being lower on the left side and higher on the right side can concentrate the stress of the sealing surface on one side of the elastomer 3, and extend the root of the sealing lip 23, thereby improving the sealing ability.

[0022] The elastomer 3 is a nitrile rubber O-ring, and the elastomer 3 has a frosted surface. In a specific implementation, the nitrile rubber O-ring can prevent the sealing body 2 from failing due to the attenuation of sealing stress and rebound performance after being under long-term pressure, thereby playing an elastic compensation role; the frosted surface can increase the adhesion of the O-ring in the U-shaped groove 22, avoid the extrusion of the O-ring, and thus improve the sealing reliability.

[0023] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A jack cylinder guide sleeve combined static seal, characterized by: The invention comprises a support ring (1), a sealing body (2) and an elastic body (3); the side wall of the support ring (1) is provided with a V-shaped groove (11); one side of the sealing body (2) is provided with a conical structure (21) and the other side is provided with a U-shaped groove (22); the conical structure (21) of the sealing body (2) is fitted with the V-shaped groove (11) of the support ring (1); and the elastic body (3) is embedded in the U-shaped groove of the sealing body (2) by interference fit.

2. The jack cylinder guide sleeve combined static seal according to claim 1, characterized in that: The support ring (1) is a polyoxymethylene support ring, and the support ring (1) is provided with an inclined opening (12).

3. The jack cylinder guide sleeve combined static seal according to claim 1, characterized in that: The sealing body (2) is a polyurethane sealing ring, and annular lines are distributed on the surface of the sealing body (2). Sealing lips (23) are respectively provided on the upper and lower sides of the sealing body (2), and the sealing lips (23) are lower on the left and higher on the right.

4. The jack cylinder guide sleeve combined static seal according to claim 1, characterized in that: The elastic body (3) is a nitrile rubber O-ring, and the elastic body (3) has a frosted surface.

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