Sealing device of hydraulic cylinder

Abstract

The utility model discloses a hydraulic cylinder sealing device which comprises a cylinder body, first sealing assemblies are arranged at the two ends of the cylinder body, an auxiliary assembly is arranged on the first sealing assemblies, a second sealing assembly is arranged on one side of the auxiliary assembly, and a third sealing assembly is arranged on the inner wall of the second sealing assembly and one side of the first sealing assembly. The second sealing assembly is arranged on the auxiliary assembly, it is ensured that when the hydraulic cylinder is not connected with a hydraulic pipeline or used, hydraulic oil cannot leak when flowing in a liquid conveying hole, and meanwhile the third sealing assembly arranged between the second sealing assembly and the first sealing assembly can effectively prevent the hydraulic oil from leaking when not used; the sealing reliability can be ensured even under the condition of high pressure or long-time operation, the sealing performance of the connecting position of the cylinder body can be improved and the risk of hydraulic oil leakage can be reduced through the first sealing assembly arranged on the cylinder body, meanwhile, fault components can be rapidly positioned and replaced through the auxiliary assembly arranged on the second sealing assembly, and the maintenance time and cost are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic cylinder sealing technical field, concretely relates to a sealing device of hydraulic cylinder. BACKGROUND

[0002] As the key execution element in hydraulic system, hydraulic cylinder is widely used in various mechanical equipment, such as engineering machinery, metallurgical equipment, ship, aerospace etc., and the main function of hydraulic cylinder is to convert hydraulic energy into mechanical energy, and to realize push-pull, lifting, pressing through the reciprocating motion of piston. In the working process of hydraulic cylinder, the performance of sealing device of hydraulic cylinder directly influences the efficiency and reliability of hydraulic system.

[0003] But the existing hydraulic cylinder sealing device often adopts single sealing structure, for example, only relies on sealing ring or other simple sealing structure, and these sealing structures are prone to sealing failure under the condition of high pressure or long time operation, for example, sealing ring may be deformed or worn after long-term pressure, resulting in hydraulic oil leakage.

[0004] For the problems in the related art, no effective solution has been proposed so far. UTILITY MODEL CONTENT

[0005] In view of the problems in the related art, the utility model provides a sealing device of hydraulic cylinder to overcome the above technical problems existing in the prior art.

[0006] Therefore, the utility model adopts the specific technical scheme as follows:

[0007] A sealing device of hydraulic cylinder, comprising a cylinder body, two ends of the cylinder body are provided with a sealing assembly one, an auxiliary assembly is arranged on the sealing assembly one, one side of the auxiliary assembly is provided with a sealing assembly two, an inner wall of the sealing assembly two and one side of the sealing assembly one are provided with a sealing assembly three, the sealing assembly three comprises an output hole opened in the inner wall of the sealing assembly two and one side of the sealing assembly one, an inner wall of the output hole is provided with a mounting groove, an inner wall of the mounting groove is provided with a rotating rod, a surface of the rotating rod is provided with a sealing plate two, an outer periphery of the sealing plate two is provided with a sealing gasket two, and a surface of the sealing gasket two is connected with the inner wall of the output hole.

[0008] Further, in order to improve the sealing property of the hydraulic cylinder, the sealing assembly one comprises a sealing sleeve arranged at both ends of the cylinder body, one side of the sealing sleeve is connected with an end cover one and an end cover two respectively, the output hole is arranged at one side of the end cover one and the end cover two, an inner wall of the cylinder body is provided with a piston, the piston is provided with a mounting hole, an inner wall of the mounting hole is provided with a piston rod, one end of the piston rod is provided with a limiting block through screw connection, a surface of the other end of the piston rod is provided with a sealing block, and the sealing block is connected with the inner part of one end of the end cover.

[0009] Further, in order to improve the sealing of the hydraulic cylinder, the auxiliary assembly comprises a plurality of auxiliary holes formed on the end cover one and the end cover two, the inner wall of the plurality of auxiliary holes is provided with an auxiliary rod, one end of the auxiliary rod is provided with a fixed block in a threaded manner, and one side of the fixed block is in contact with one side of the end cover two.

[0010] Further, in order to improve the sealing of the hydraulic cylinder, the sealing assembly two comprises a liquid outlet hole formed on one side of the end cover one and the end cover two, the output hole is formed on the inner wall of the liquid outlet hole, the inner wall of the liquid outlet hole is fixedly provided with a spring sleeve telescopic rod, one end of the spring sleeve telescopic rod is fixedly provided with a sealing plate one, and the outer periphery of the sealing plate one is provided with a sealing gasket one, and one side of the sealing gasket one is in contact with the inner wall of the liquid outlet hole.

[0011] Further, in order to better install the hydraulic cylinder, the piston rod is provided with a connecting seat on one end and one side of the end cover one, the connecting seat is provided with a connecting groove, and the two sides of the connecting seat are provided with connecting holes.

[0012] Further, the inner wall of the connecting hole is communicated with the inner wall of the connecting groove, and the connecting rod is arranged in the connecting hole.

[0013] Further, in order to better improve the sealing of the piston, a plurality of mounting grooves are formed on the piston, and the inner wall of the plurality of mounting grooves is provided with a sealing ring.

[0014] The beneficial effects of the utility model are as follows:

[0015] (1), through the sealing assembly two arranged in the auxiliary assembly, it is ensured that the hydraulic cylinder does not leak when not connecting the hydraulic pipeline or the hydraulic oil flows in the liquid outlet hole when using, further prevents the hydraulic oil from leaking from the liquid outlet hole, and at the same time, the sealing assembly three arranged in the sealing assembly two and the sealing assembly one can effectively prevent the hydraulic oil from leaking when not using, and further enhances the sealing effect, even in the case of high pressure or long time operation, the reliability of the sealing can be ensured.

[0016] (2), through the sealing assembly one arranged in the cylinder body, the sealing property of the cylinder body connecting portion can be improved, and the risk of hydraulic oil leakage is reduced, and at the same time, the auxiliary assembly arranged in the sealing assembly two can quickly position and replace the faulty parts, and the maintenance time and cost are reduced. DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0018] Figure 1It is a main body structure schematic view of a sealing device of a hydraulic cylinder according to an embodiment of the utility model;

[0019] Figure 2 It is a side structure schematic view of a sealing device of a hydraulic cylinder according to an embodiment of the utility model;

[0020] Figure 3 It is a sealing assembly one and auxiliary assembly partial structure schematic view of a sealing device of a hydraulic cylinder according to an embodiment of the utility model;

[0021] Figure 4 It is a sealing assembly one partial structure schematic view of a sealing device of a hydraulic cylinder according to an embodiment of the utility model Figure 1 ;

[0022] Figure 5 It is a sealing assembly one partial structure schematic view of a sealing device of a hydraulic cylinder according to an embodiment of the utility model Figure 2 ;

[0023] Figure 6 It is an auxiliary hole and sealing block structure schematic view of a sealing device of a hydraulic cylinder according to an embodiment of the utility model;

[0024] Figure 7 It is a sealing assembly two and sealing assembly three structure schematic view of a sealing device of a hydraulic cylinder according to an embodiment of the utility model.

[0025] In the drawing:

[0026] 1, cylinder body; 2, sealing assembly one; 201, sealing sleeve; 202, end cover one; 203, end cover two; 204, piston; 205, mounting hole; 206, piston rod; 207, limiting block; 208, sealing block; 3, auxiliary assembly; 301, auxiliary hole; 302, auxiliary rod; 303, fixed block; 4, sealing assembly two; 401, infusion hole; 402, spring sleeve telescopic rod; 403, sealing plate one; 404, sealing gasket one; 5, sealing assembly three; 501, output hole; 502, rotating rod; 503, sealing plate two; 504, sealing gasket two; 6, connecting seat; 7, connecting hole; 8, connecting rod; 9, sealing ring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] According to the embodiment of the utility model, a sealing device of a hydraulic cylinder is provided.

[0029] Embodiment one;

[0030] As Figures 1-7 shown, according to the utility model embodiment one kind is provided a sealing device of a hydraulic cylinder, including cylinder body 1, the both ends of cylinder body 1 are equipped with sealing assembly one 2, sealing assembly one 2 includes the sealing sleeve 201 of setting of both ends of cylinder body 1, the side of sealing sleeve 201 is connected with end cover one 202 and end cover two 203 respectively, the inner wall of cylinder body 1 is installed with piston 204, a plurality of installation grooves are set up on piston 204, the number of installation groove is two, the inner wall of a plurality of installation grooves is installed with sealing ring 9, the installation hole 205 is set up on piston 204, the inner wall of installation hole 205 is equipped with piston rod 206, the one end of piston rod 206 is installed threaded connection with limit block 207, the surface of the other end of piston rod 206 is installed with sealing block 208, sealing block 208 is connected with the inside of the one end of end cover;

[0031] the one end of piston rod 206 and the side of end cover one 202 are equipped with connecting seat 6, connecting seat 6 is set up with connecting groove, the both sides of connecting seat 6 are set up with connecting hole 7, the inner wall of connecting hole 7 and the inner wall of connecting groove are communicated, the inner wall of connecting hole 7 is equipped with connecting rod 8;

[0032] sealing assembly one 2 is equipped with auxiliary assembly 3, auxiliary assembly 3 includes the multiple auxiliary holes 301 of setting on end cover one 202 and end cover two 203, the number of auxiliary hole 301 is four, the inner wall of multiple auxiliary holes 301 is installed with auxiliary rod 302, the one end of auxiliary rod 302 is threaded with fixed block 303, the side of fixed block 303 and the side of end cover two 203 contact.

[0033] Embodiment two;

[0034] As Figures 1-7 shown, according to the utility model embodiment one kind is provided a sealing device of a hydraulic cylinder, the one side of auxiliary assembly 3 is equipped with sealing assembly two 4, sealing assembly two 4 includes the infusion hole 401 of setting on the one side of end cover one 202 and end cover two 203, infusion hole 401 is installed with external infusion tube in actual use, for conveying the hydraulic oil (not shown in the drawing) required by hydraulic cylinder, the inner wall of infusion hole 401 is fixed with spring sleeve telescopic rod 402, the one end of spring sleeve telescopic rod 402 is fixed with sealing plate one 403, sealing plate one 403 can be lifted by external pipe in actual use, also can be lifted by the pressure action of hydraulic oil, so that sealing plate one 403 is under the pressure of telescopic and is pressed down, facilitate the conveying and circulation of hydraulic fluid, the periphery of sealing plate one 403 is installed with sealing gasket one 404, the side of sealing gasket one 404 and the inner wall of infusion hole 401 contact;

[0035] The inner wall of the sealing assembly two 4 and one side of the sealing assembly one 2 are provided with a sealing assembly three 5, the sealing assembly three 5 comprises an output hole 501 provided in the inner wall of the infusion hole 401 and one side of the end cover one 202 and the end cover two 203 of the sealing assembly two 4, the inner wall of the output hole 501 is provided with a mounting groove, the inner wall of the mounting groove is provided with a rotating rod 502, the surface of the rotating rod 502 is provided with a sealing plate two 503, the outer periphery of the sealing plate two 503 is provided with a sealing gasket two 504, and the surface of the sealing gasket two 504 is connected with the inner wall of the output hole 501;

[0036] The sealing gasket two 504, the sealing gasket one 404, the sealing block 208, the sealing sleeve 201 and the sealing ring 9 are coated with a high and low temperature resistant coating, a corrosion resistant coating and a wear resistant coating (not shown in the figure) in actual use.

[0037] In order to facilitate the understanding of the above technical scheme of the utility model, the working principle or operation mode of the utility model in the actual process will be described in detail.

[0038] In summary, by means of the above technical scheme of the utility model, in actual use, the staff sets a connecting seat 6 on one end of the piston rod 206 and one side of the end cover one 202, a connecting groove is formed in the connecting seat 6, connecting holes 7 are formed in the two sides of the connecting seat 6, the inner wall of the connecting hole 7 communicates with the inner wall of the connecting groove, a connecting rod 8 is arranged in the inner wall of the connecting hole 7, and the connecting rod 8 is used for connecting the hydraulic cylinder with other equipment, when the hydraulic cylinder works, the piston 204 reciprocates in the cylinder body 1, the extension and retraction of the piston rod 206 realizes the pushing and pulling and lifting action, a plurality of sealing rings 9 are arranged on the piston 204 and used for preventing the hydraulic oil from leaking during the movement of the piston, and the sealing property of the hydraulic cylinder is ensured, when the hydraulic oil enters the infusion hole 401, the sealing plate one 403 is lifted or connected with the inner wall of the infusion hole 401 under the pressure of the hydraulic oil, the outer connecting pipe lifts the sealing plate one 403, the hydraulic oil enters the cylinder body 1 through the space below the sealing plate one 403, when the hydraulic oil pressure disappears, the elastic effect of the spring sleeve telescopic rod 402 makes the sealing plate one 403 return to the original position, the sealing gasket one 404 is in close contact with the inner wall of the infusion hole 401 again, and the leakage of the hydraulic oil is prevented, meanwhile, when the hydraulic oil flows out of the output hole 501, the sealing plate two 503 rotates under the pressure of the hydraulic oil, the hydraulic oil flows out through the gap between the sealing plate two 503 and the output hole 501, when the hydraulic oil pressure disappears, the sealing plate two 503 returns to the original position under the action of the rotating rod 502, the sealing gasket two 504 is in close contact with the inner wall of the output hole 501 again, and the leakage of the hydraulic oil is prevented, when maintenance is needed, the sealing assembly one 2 and the sealing assembly two 4 can be conveniently disassembled and maintained through the connection of the auxiliary rod 302 and the fixing block 303, and the maintenance time and cost are reduced.

[0039] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sealing arrangement for a hydraulic cylinder, characterized in that The utility model provides a sealing assembly, including cylinder (1), both ends of cylinder (1) are equipped with sealing assembly one (2), the auxiliary assembly (3) is provided on sealing assembly one (2), one side of auxiliary assembly (3) is equipped with sealing assembly two (4), the inner wall of sealing assembly two (4) and the one side of sealing assembly one (2) is equipped with sealing assembly three (5), sealing assembly three (5) includes the output hole (501) that the inner wall of sealing assembly two (4) and the one side of sealing assembly one (2) are equipped with, the inner wall of output hole (501) is equipped with the mounting groove, the inner wall of mounting groove is provided with rotary rod (502), the surface of rotary rod (502) is equipped with sealing plate two (503), sealing plate two (503) is equipped with sealing pad two (504) on the periphery, the surface of sealing pad two (504) is connected with the inner wall of output hole (501).

2. A seal assembly for a hydraulic cylinder as defined in claim 1, wherein, The sealing assembly one (2) includes the sealing sleeve (201) that both ends of cylinder (1) are provided with, the one side of sealing sleeve (201) is connected with end cover one (202) and end cover two (203) respectively, the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), the output hole (501) is equipped in the one side of end cover one (202) and end cover two (203), the inner wall of cylinder (1) is installed with piston (204), 3. A seal assembly for a hydraulic cylinder as defined in claim 2, wherein, ​ 4. A seal assembly for a hydraulic cylinder as claimed in claim 3, wherein, ​ 5. A seal assembly for a hydraulic cylinder as claimed in claim 4, wherein, ​ 6. A seal assembly for a hydraulic cylinder as claimed in claim 5, wherein, ​ 7. A seal assembly for a hydraulic cylinder as claimed in claim 6, wherein, ​

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