CN118026026B - Hydraulic support aqueous medium pushing jack sealing device - Google Patents
Hydraulic support aqueous medium pushing jack sealing device Download PDFInfo
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- CN118026026B CN118026026B CN202410438511.5A CN202410438511A CN118026026B CN 118026026 B CN118026026 B CN 118026026B CN 202410438511 A CN202410438511 A CN 202410438511A CN 118026026 B CN118026026 B CN 118026026B
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- piston
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- 238000007789 sealing Methods 0.000 title claims abstract description 114
- 239000012736 aqueous medium Substances 0.000 title claims description 20
- 239000000428 dust Substances 0.000 claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 37
- 229920001971 elastomer Polymers 0.000 claims description 29
- 239000000806 elastomer Substances 0.000 claims description 29
- 230000007062 hydrolysis Effects 0.000 claims description 10
- 238000006460 hydrolysis reaction Methods 0.000 claims description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 10
- 229920002635 polyurethane Polymers 0.000 claims description 10
- 239000004814 polyurethane Substances 0.000 claims description 10
- 229920000459 Nitrile rubber Polymers 0.000 claims description 6
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 6
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- 239000004917 carbon fiber Substances 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- 229920006324 polyoxymethylene Polymers 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 28
- 238000005299 abrasion Methods 0.000 abstract description 18
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 230000003139 buffering effect Effects 0.000 abstract 1
- 239000002609 medium Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 10
- 229910052802 copper Inorganic materials 0.000 description 10
- 239000010949 copper Substances 0.000 description 10
- 238000005065 mining Methods 0.000 description 9
- 229910000881 Cu alloy Inorganic materials 0.000 description 6
- 238000005253 cladding Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 230000008018 melting Effects 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000003053 toxin Substances 0.000 description 1
- 231100000765 toxin Toxicity 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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Abstract
The invention provides a hydraulic support water medium pushing jack sealing device which comprises a cylinder barrel, a piston rod, a guide sleeve and a cylinder bottom, wherein one end of the cylinder barrel is connected with the cylinder bottom, the other end of the cylinder barrel is connected with the guide sleeve, the piston rod is in sliding connection with the guide sleeve in the cylinder barrel, the piston is arranged at one end of the piston rod and is in sliding connection with the cylinder barrel, a piston rod sealing ring is arranged on the guide sleeve, a buffering seal for a shaft, a guide ring for a shaft, a dust ring and a cylinder opening are sealed, a guide ring for a hole is arranged on the piston, a linear displacement sensor is arranged in the piston rod, and a communicating pipe is arranged in the cylinder bottom. The invention provides a hydraulic support water medium pushing jack sealing device, which can effectively solve the problems that cavitation and noise are generated due to large impact force caused by the use environment of water medium, dry friction and corrosion are easy to generate, accelerated abrasion and leakage are easy to occur, the service life of a pushing jack is prolonged, and the leakage of the water medium is prevented.
Description
Technical Field
The invention relates to the technical field of hydraulic support pushing jacks, in particular to a hydraulic support aqueous medium pushing jack sealing device.
Background
The hydraulic support is a key device for mechanization and automation of modern coal mining equipment, and is combined with a high-power coal mining machine and a scraper conveyor to form underground working face comprehensive mechanized coal mining equipment. The hydraulic support pushing device (comprising pushing rod, pushing jack, pushing connector and other parts) mainly pushes and pulls the hydraulic support to ensure the functions of pulling the hydraulic support and pushing. In the underground working face upward mining process, the pushing jack is long in stroke, subjected to larger unbalanced load, and subjected to frequent reciprocating motion, poor lubrication, rust, impurities and other factors, so that the jack is led to single-side friction to generate batch liquid mixing and sealing failure, and the pulling frame and pushing efficiency of the hydraulic support are affected. The stability of the pushing jack plays an important role in the moving frame and pushing motion of the fully mechanized mining equipment, and determines the safety of the fully mechanized mining working environment and the production efficiency of the working face. Therefore, the reliability research of the sealing device of the hydraulic support, which is subjected to the change of geological conditions and coal mining working conditions, is attracting more and more attention from the society.
The surface of a piston rod and the interior of a cylinder barrel of a conventional emulsion medium pushing jack are corroded, pitted, pit and the like due to pressure bearing and corrosion, so that various service performances of the sealing element are seriously affected, the sealing element is invalid in use, and large-area system leakage, water pollution and soil oiliness are caused. The jack using pure water as a medium has the advantages of no pollution, low cost, flame retardance and the like, and is a trend of development of the green exploitation industry in the future. In the prior art, as the sealing component of the pure water medium hydraulic cylinder and the hydraulic cylinder disclosed in the Chinese published patent CN 214837473U, pure water medium is added in the hydraulic cylinder, the pure water medium does not contain any toxin, even if the pure water medium leaks, the pure water medium also has no pollution to the environment, and the pure water medium is not easy to deteriorate and has longer service life. However, pure water medium has large impact force compared with hydraulic oil or emulsion medium, is easy to generate cavitation erosion, vibration and noise, has poor lubricating property, is easy to generate dry friction and corrosion to accelerate wear speed, and has much lower viscosity than hydraulic oil, so that leakage is easier.
Disclosure of Invention
The invention aims to provide a hydraulic support water medium pushing jack sealing device, which solves the problems of environmental pollution, cavitation, vibration and noise generated by water medium, easy generation of dry friction and corrosion, accelerated wear speed and easy leakage in the prior art, and helps to mechanically and environmentally-friendly mining of modern coal mining equipment.
A hydraulic stand aqueous medium pushing jack sealing device, comprising:
The cylinder barrel is characterized by comprising a cylinder barrel, a piston rod, a guide sleeve and a cylinder bottom, wherein one end of the cylinder barrel is connected with the cylinder bottom, the other end of the cylinder barrel is connected with the guide sleeve, the piston rod is in sliding connection with the guide sleeve in the cylinder barrel, the piston is arranged at one end of the piston rod, the piston is in sliding connection with the cylinder barrel, a piston rod sealing ring is arranged on the guide sleeve, a shaft buffer seal, a shaft guide ring, a dust ring and a cylinder port seal are arranged on the guide sleeve, a hole guide ring is arranged on the piston, a piston sealing ring is arranged in the piston rod, a linear displacement sensor is arranged in the piston rod, and a communicating pipe is arranged in the cylinder bottom; the cylinder opening is sealed and arranged on the outer wall of the guide sleeve and used for sealing the guide sleeve and the cylinder barrel. The piston sealing ring and the guide ring for the hole are arranged on the outer wall of the piston and are contacted with the inner wall of the cylinder barrel.
Preferably, the piston rod sealing ring comprises a first elastomer and a first wear-resistant ring, and the inner side wall of the first wear-resistant ring is sleeved on the inner side wall of the first elastomer. The first elastomer keeps the piston rod sealing ring elastic, and the first wear-resistant ring has wear resistance.
Further preferably, the material of the first elastomer is nitrile rubber, and the material of the first wear-resistant ring is hydrolysis-resistant modified wear-resistant self-lubricating polyurethane material, modified ultra-high molecular weight polyethylene or modified polytetrafluoroethylene.
Further preferably, the material of the first wear-resistant ring is modified ultra-high molecular weight modified polyethylene, and the molecular weight is more than 900 ten thousand molecular weight or hydrolysis-resistant modified wear-resistant self-lubricating polyurethane. The first wear-resistant ring has higher wear resistance, can be used for a long time under the condition of poor water medium lubricity, and has higher service life.
Preferably, the inner side wall of the first elastic body is provided with a first protruding part, and the middle thickness of the first protruding part is larger than the thickness of the two ends; the outer side wall of the first wear-resistant ring is provided with a compensation layer, and the compensation layer is attached to the first protruding part; the inner side wall of the first wear-resisting ring is provided with a second protruding portion. The compensation layer promotes the connection force of the first elastomer and the first wear-resistant ring, and prevents the first wear-resistant ring from being separated from the first elastomer. The first bulge can provide sufficient sealing pretightening force for the first wear-resisting ring, plays a role in compensating the first wear-resisting ring, can bear larger impact force and has better sealing effect, the second bulge is favorable for reducing the pressure of abrasion and sealing areas, the piston rod sealing ring can bear larger dynamic pressure impact in the reciprocating motion process of the piston rod on the basis of not changing the construction size and the material performance, the sealing performance of the piston rod is ensured during pressure change, and the service life is longer.
Preferably, the piston sealing ring comprises a second elastomer and a second wear-resistant ring, and the inner side wall of the second wear-resistant ring is sleeved on the outer side wall of the second elastomer. The second elastomer keeps the piston rod sealing ring elastic, and the second wear-resistant ring has wear resistance.
Further preferably, the material of the second elastomer is nitrile rubber, and the material of the second wear-resistant ring is hydrolysis-resistant modified wear-resistant self-lubricating polyurethane material, modified ultra-high molecular weight polyethylene or modified polytetrafluoroethylene.
Further preferably, the second wear-resistant ring is made of modified ultra-high molecular weight polyethylene, and has a molecular weight of more than 900 ten thousand or is hydrolysis-resistant modified wear-resistant self-lubricating polyurethane. The second wear-resistant ring has higher wear resistance, can be used for a long time under the condition of poor water medium lubricity, and has higher service life.
Preferably, the section of the second elastomer is T-shaped, two ends of the second elastomer are provided with support ring grooves, L-shaped support rings are arranged in the support ring grooves, and the second wear-resistant ring is arranged between the L-shaped support rings. The L-shaped support ring can have the functions of lateral extrusion resistance, unbalanced load resistance and impact pressure resistance on the second elastomer, is favorable for reducing abrasion, pulse and pressure impact damage, adapts to dynamic pressure in the process of linear reciprocating motion of the piston, ensures the tightness of the piston and prolongs the service life of the piston.
Further preferably, the L-shaped support ring is made of carbon fiber modified polyformaldehyde material, so that high pressure resistance, lateral unbalanced load resistance and service life are greatly improved;
preferably, the outer side wall of the second wear-resistant ring is provided with a third protruding portion, and the middle thickness of the third protruding portion is larger than the thickness of the two ends. The third bulge is favorable for reducing the abrasion and the pressure of a sealing area, and the piston sealing ring can bear larger dynamic pressure impact in the reciprocating motion process of the piston rod on the basis of not changing the constitution size and the material performance, so that the tightness of the piston rod is ensured, and the service life is longer.
Preferably, three guide rings for shafts in the guide sleeve are arranged, and the guide rings for shafts are in sliding connection with the piston rod; two guide rings for holes are respectively arranged on two sides of the piston sealing ring, and the guide rings for holes are in sliding connection with the cylinder barrel.
The guide ring for the shaft and the guide ring for the hole are made of carbon fiber modified polyformaldehyde materials, so that side unbalanced load is improved, and the service life of the guide ring for the shaft and the guide ring for the hole is prolonged.
Preferably, the dustproof ring is an umbrella-shaped double-lip dustproof ring, a clamping groove is formed in the outer side of the dustproof ring, the clamping groove is connected with the guide sleeve in a clamping mode, a conical surface is arranged on the inner side of the dustproof ring, and a fourth protruding portion is arranged on the inner side of the dustproof ring. The dust ring can effectively prevent external dust and mud from entering the cylinder barrel to pollute the pure water medium.
Preferably, the buffer seal for the shaft is positioned between the guide ring for the shaft and the piston rod sealing ring. The buffer seal for the shaft can cut off the impact pressure during high pressure, and reduces the impact frequency to the piston rod sealing ring.
Preferably, a cylinder port seal is arranged on the outer side surface of the guide sleeve, and the cylinder port seal is connected with the inner wall of the cylinder barrel.
Further preferably, the cylinder port sealing structure is one of a Y-shaped ring, a dumbbell seal or a K-shaped seal. The cylinder mouth seal has the advantages of high pressure resistance, extrusion resistance and convenient installation.
Further preferably, the cylinder opening sealing material is hydrolysis-resistant high-resilience polyurethane material.
Preferably, the inner wall of the cylinder barrel, the surface of the guide sleeve and the surface of the piston are plated with copper layers.
Further preferably, the copper layer adopts a cold melting copper alloy cladding process, the copper layer is made of Mn10-AL8-Ni5 high manganese nickel aluminum bronze, the tensile strength is more than or equal to 600MPa, the thickness is 0.8-1.0 mm, and the hardness is HB180-260. The copper layer plated by adopting the cold-melting copper alloy cladding process has higher rust resistance, corrosion resistance and pollution resistance, and improves the wear resistance.
Preferably, the guide sleeve is formed by connecting a guide sleeve assembly A and a guide sleeve assembly B through threads, and a piston rod sealing groove is formed at the joint of the end surfaces of the guide sleeve assembly A and the guide sleeve assembly B and used for placing a piston rod sealing ring.
The beneficial effects are that:
1. the invention provides a hydraulic support aqueous medium pushing jack sealing device, which can effectively solve the problems that cavitation and noise are generated due to large impact force caused by an aqueous medium, dry friction and corrosion are easy to generate, accelerated abrasion are easy to occur, and leakage is easy to occur, and the service life of a pushing jack is prolonged, so that the aqueous medium leakage is prevented.
2. The common piston rod sealing ring in the prior art is not suitable for the pushing jack of the water medium, and the common piston rod sealing ring is easy to leak or has high abrasion speed and has low service life because the water medium has poor lubricity, low viscosity and large impact force. The piston rod sealing ring is improved and comprises the first elastomer and the first wear-resistant ring, the first elastomer enables the piston rod sealing ring to keep elasticity, the first wear-resistant ring has wear resistance, the first bulge can provide enough sealing pretightening force for the first wear-resistant ring and has a compensation effect on the first wear-resistant ring, the second bulge can bear larger impact force and has better sealing effect, the second bulge is helpful for reducing the pressure of abrasion and sealing areas, the piston rod sealing ring can bear larger dynamic pressure impact in the reciprocating motion process of the piston rod on the basis of not changing the constitution size and the material performance, the sealing performance of the piston rod is ensured, and the service life is longer.
3. The common piston sealing ring in the prior art is not suitable for the pushing jack of the water medium, and meanwhile, because the two ends of the piston can be impacted by the water medium when the piston linearly reciprocates, the piston needs to bear larger axial resistance. According to the invention, the piston sealing ring is improved and comprises a second elastomer and a second wear-resistant ring, the second elastomer enables the piston rod sealing ring to keep elastic, and the second wear-resistant ring has wear resistance. The L-shaped support ring may have a lateral compression effect on the second elastomer, helping to reduce wear and seal pressure. The concave part has the functions of extrusion resistance and impact resistance, and the dynamic pressure born in the process of linear reciprocating motion of the piston is larger, so that the tightness of the piston is ensured, and the service life of the piston is prolonged. The third bulge is favorable for reducing the abrasion and the pressure of a sealing area, and the piston sealing ring can bear larger dynamic pressure impact in the reciprocating motion process of the piston on the basis of not changing the constitution size and the material property, so that the tightness of the piston is ensured, and the service life is longer.
4. The guide sleeve is internally provided with three guide rings for the shaft, the piston is provided with four guide rings and high-performance modified materials are applied, so that the lateral load resistance and the abrasion resistance are greatly improved, and the service lives of the piston rod and the cylinder barrel are prolonged.
5. The middle of the guide ring for the shaft and the piston rod sealing ring is provided with a buffer seal for the shaft. The buffer seal for the shaft can cut off the impact pressure during high pressure, reduce the impact frequency to the piston rod sealing ring and prolong the service life of the piston rod sealing ring.
6. Because the piston rod sealing ring is added with the first wear-resistant ring, the hardness of the piston rod sealing ring is increased, the elasticity is reduced, and the piston rod sealing ring is difficult to assemble. The guide sleeve is divided into a guide sleeve assembly and a guide sleeve assembly, the piston rod sealing ring is firstly placed in the guide sleeve assembly, and then the guide sleeve assembly is rotated through threads, so that the piston rod sealing ring is compressed.
7. The inner wall of the cylinder barrel, the surface of the guide sleeve and the surface of the piston are plated with copper layers, and the copper layers adopt a cold melting copper alloy cladding process. The copper layer plated by adopting the cold-melting copper alloy cladding process has higher rust resistance, corrosion resistance and pollution resistance, and improves the wear resistance.
Drawings
Fig. 1 is a schematic structural view of an embodiment 1 of a hydraulic support aqueous medium pushing jack sealing device provided by the invention.
Fig. 2 is an enlarged view of the guide sleeve structure of embodiment 1 of the hydraulic support aqueous medium pushing jack sealing device provided by the invention.
Fig. 3 is an enlarged view of a piston structure of an embodiment 1 of a hydraulic support aqueous medium pushing jack sealing device provided by the invention.
Fig. 4 is a schematic structural view of a piston rod sealing ring of embodiment 1 of a hydraulic support aqueous medium pushing jack sealing device provided by the invention.
Fig. 5 is a schematic structural diagram of a piston seal ring of embodiment 1 of a hydraulic support aqueous medium pushing jack sealing device provided by the invention.
Fig. 6 is a schematic structural view of a dust ring of embodiment 1 of a hydraulic support aqueous medium pushing jack sealing device provided by the invention.
Fig. 7 is an enlarged view of the guide sleeve structure of embodiment 2 of the hydraulic support aqueous medium pushing jack sealing device provided by the invention.
In the figure, 1-cylinder barrel, 2-piston, 3-piston rod, 4-guide sleeve, 401-guide sleeve assembly A, 402-guide sleeve assembly B, 5-cylinder bottom, 501-communication pipe, 6-piston rod sealing ring, 601-first elastic body, 602-first abrasion-resistant ring, 6011-first boss, 6021-second boss, 603-compensation layer, 7-buffer seal for shaft, 8-guide ring for shaft, 9-dust-resistant ring, 901-clamping groove, 902-conical surface, 903-fourth boss, 10-cylinder opening seal, 11-piston sealing ring, 1101-second elastic body, 1102-second abrasion-resistant ring, 11011-support ring groove, 1103-L type support ring, 11021-third boss, 12-guide ring for hole, and 13-linear displacement sensor.
Detailed Description
The contents of the present invention can be more easily understood with reference to the following detailed description of preferred embodiments of the present invention and examples included. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, definitions, will control.
Example 1:
The invention provides a hydraulic support aqueous medium pushing jack sealing device, which provides a high-reliability pushing jack sealing system solution by using measures such as modified high-performance sealing materials, optimized sealing structures and the like.
The invention provides a hydraulic support aqueous medium pushing jack sealing device, as shown in figures 1-4, comprising:
The cylinder barrel 1, the piston 2, the piston rod 3, the uide bushing 4, the cylinder bottom 5 is connected to cylinder barrel 1 one end, and uide bushing 4 is connected to the other end, piston rod 3 is at the inside of cylinder barrel 1 and uide bushing 4 sliding connection, piston 2 sets up the one end at piston rod 3, piston 2 and cylinder barrel 1 sliding connection, be provided with piston rod sealing washer 6 on the uide bushing 4, buffer seal 7 for the axle, guide ring 8 for the axle, dust ring 9, jar mouth seal 10, be provided with piston sealing washer 11, guide ring 12 for the hole on the piston 2, piston sealing washer 12, the inside linear displacement sensor 13 that is provided with of piston rod 3 is provided with communicating pipe 501 in the cylinder bottom 5.
The piston rod sealing ring 6 comprises a first elastomer 601 and a first wear-resistant ring 602, and the inner side wall of the first wear-resistant ring 602 is sleeved on the inner side wall of the first elastomer 601. The first elastic body 601 keeps the piston rod sealing ring 6 elastic, and the first wear ring 602 has wear resistance. The material of the first elastomer 601 is nitrile rubber, and the material of the first wear-resistant ring 602 is hydrolysis-resistant modified wear-resistant self-lubricating polyurethane material. The material of the first wear ring 602 is modified ultra-high molecular weight modified polyethylene and has a molecular weight greater than 900 parts per million.
The inner side wall of the first elastic body 601 is provided with a first protruding portion 6011, and the middle thickness of the first protruding portion 6011 is larger than the thickness of the two ends; the outer side wall of the first wear ring 602 is provided with a compensation layer 603, and the compensation layer 603 is attached to the first protruding portion 6011; the inner side wall of the first wear ring 602 is provided with a second boss 6021. The compensation layer 603 promotes the connection force of the first elastic body 601 and the first wear ring 602, and prevents the first wear ring 602 from being separated from the first elastic body 601. The first protruding portion 6011 can provide enough sealing pretightening force for the first wear-resistant ring 602, plays a compensation role for the first wear-resistant ring 602, can bear larger impact force and has better sealing effect, the second protruding portion 6021 is helpful for reducing the pressure of abrasion and sealing areas, the piston rod sealing ring 6 can bear larger dynamic pressure impact in the reciprocating motion process of the piston rod 3 on the basis of not changing the constitution size and the material performance, the sealing performance of the piston rod 3 is guaranteed when the pressure is changed, and the service life is longer.
The piston seal 11 includes a second elastic body 1101 and a second wear ring 1102, and an inner side wall of the second wear ring 1102 is sleeved on an outer side wall of the second elastic body 1101. The second elastic body 1101 keeps the piston seal 11 elastic, and the second abrasion resistant ring 1102 has abrasion resistance. The material of the second elastomer 1101 is nitrile rubber, and the material of the second wear ring 1102 is hydrolysis-resistant modified wear-resistant self-lubricating polyurethane material. The second wear collar 1102 is made of modified ultra-high molecular weight polyethylene and has a molecular weight greater than 900 parts per million. The second wear ring 1102 has high wear resistance, can be used for a long time under the condition of poor water medium lubricity, and has a long service life.
The section of the second elastic body 1101 is T-shaped, the two ends of the second elastic body 1101 are provided with support ring grooves 11011, L-shaped support rings 1103 are arranged in the support ring grooves 11011, and the second wear-resistant rings 1102 are arranged between the L-shaped support rings 1103. The L-shaped support ring 1103 can have the functions of lateral extrusion resistance, unbalanced load resistance and impact pressure resistance on the second elastic body 1101, and is helpful for reducing abrasion, pulse and pressure impact damage, adapting to dynamic pressure in the process of linear reciprocating motion of the piston 2, ensuring the tightness of the piston 2 and prolonging the service life. The L-shaped supporting ring 1103 is made of carbon fiber modified polyformaldehyde material, so that the high pressure resistance, the lateral unbalanced load resistance and the service life are greatly improved;
The outer side wall of the second wear ring 1102 is provided with a third protrusion 11021, and the middle thickness of the third protrusion 11021 is greater than the thickness of the two ends. The third boss 11021 helps to reduce the abrasion and the pressure of the sealing area, and the piston sealing ring 11 can bear larger dynamic pressure impact in the reciprocating process of the piston rod 3 on the basis of not changing the construction size and the material performance, so that the tightness of the piston rod 3 is ensured, and the service life is longer.
Three guide rings 8 for shafts in the guide sleeve 4 are arranged, and the guide rings 8 for shafts are in sliding connection with the piston rod 3; two guide rings 12 for holes are respectively arranged on two sides of the piston sealing ring 11, and the guide rings 12 for holes are in sliding connection with the cylinder barrel 1. The guide ring 8 for the shaft and the guide ring 12 for the hole are made of carbon fiber modified polyoxymethylene materials, so that side unbalanced load is improved, and the service life is prolonged.
The dust ring 9 is umbrella-shaped double-lip dust ring, the outside of the dust ring 9 is provided with a clamping groove 901, the clamping groove 901 is connected with the guide sleeve 4 in a clamping way, the inside of the dust ring 9 is provided with a conical surface 902, and the inside of the dust ring 9 is provided with a fourth protruding part 903. The dust ring 9 can effectively prevent external dust and mud from entering the cylinder barrel 1 to pollute the pure water medium.
The shaft buffer seal 7 is located between the shaft guide ring 8 and the piston rod seal 6. The shaft buffer seal 7 can cut off the impact pressure at high pressure, and reduce the impact frequency to the piston rod seal 6.
The outer side surface of the guide sleeve 4 is provided with a cylinder port seal 10, and the cylinder port seal 10 is connected with the inner wall of the cylinder barrel 1. The cylinder port seal 10 has a Y-shaped seal. The cylinder port seal 10 has the advantages of high pressure resistance, extrusion resistance and convenient installation. The material of the cylinder port seal 10 is a hydrolysis-resistant high resilience polyurethane material.
The inner wall of the cylinder barrel 1, the surface of the guide sleeve 4 and the surface of the piston 2 are plated with copper layers, the copper layers are made of Mn10-AL8-Ni5 high manganese nickel aluminum bronze by adopting a cold melting copper alloy cladding process, the tensile strength is more than or equal to 600MPa, the thickness is 0.8-1.0 mm, and the hardness HB180-260. The copper layer plated by adopting the cold-melting copper alloy cladding process has higher rust resistance, corrosion resistance and pollution resistance, and improves the wear resistance.
Example 2:
As shown in fig. 7, embodiment 2 differs from embodiment 1 in that the guide sleeve 4 is formed by a guide sleeve assembly a401 and a guide sleeve assembly B402 through threaded connection, and a piston rod sealing groove is formed at the connection position of the end surfaces of the guide sleeve assembly a401 and the guide sleeve assembly B402 for placing the piston rod sealing ring 6. Since the piston rod sealing ring 6 is added with the first wear-resistant ring 602, the hardness is increased, the elasticity is reduced, and the assembly is difficult. In this embodiment, the guide sleeve 4 is divided into a guide sleeve assembly a401 and a guide sleeve assembly B402, and the piston rod sealing ring 6 is first placed in the guide sleeve assembly a401, and then the guide sleeve assembly B402 is rotated by threads, so that the piston rod sealing ring 6 is compressed.
Working principle: the communicating pipe 501 is filled with pure water, the pure water is filled into the cylinder 1, and the piston 2 is lifted up by the water pressure. During movement, the piston rod sealing ring 6 provides enough sealing pre-tightening force for the first wear-resistant ring 602 through the first protruding portion 6011, and plays a role in compensating for the first wear-resistant ring 602, the compensating layer 603 promotes the connection force between the first elastic body 601 and the first wear-resistant ring 602, the first wear-resistant ring 602 is prevented from being separated from the first elastic body 601, and the second protruding portion 6021 reduces abrasion and pressure of a sealing area. The piston 2 is pushed towards the guide sleeve 4 by water pressure, and the piston sealing ring 11 has a lateral extrusion effect on the second elastomer 1101 through the L-shaped supporting ring 1103, so that abrasion and sealing pressure are reduced. The third boss 11021 helps reduce wear and pressure in the sealing area. The piston rod sealing ring 6 and the piston sealing ring 11 can bear larger dynamic pressure impact in the reciprocating motion process of the piston rod 3 and the piston 2 on the basis of not changing the constitution size and the material performance, so that the tightness of the piston rod 3 and the piston 2 is ensured, and the service life is longer. The buffer seal 7 for the shaft can cut off the impact pressure during high pressure, reduce the impact frequency to the piston rod sealing ring 6, further improve the service life of the piston sealing ring 11, and the dust-proof ring 9 can effectively prevent external dust and mud from entering the cylinder 1 to pollute the pure water medium.
Claims (4)
1. The utility model provides a hydraulic support aqueous medium pushing jack sealing device which characterized in that includes: the cylinder barrel is characterized by comprising a cylinder barrel, a piston rod, a guide sleeve and a cylinder bottom, wherein one end of the cylinder barrel is connected with the cylinder bottom, the other end of the cylinder barrel is connected with the guide sleeve, the piston rod is in sliding connection with the guide sleeve in the cylinder barrel, the piston is arranged at one end of the piston rod, the piston is in sliding connection with the cylinder barrel, a piston rod sealing ring is arranged on the guide sleeve, a shaft buffer seal, a shaft guide ring, a dust ring and a cylinder opening seal are arranged on the guide sleeve, a hole guide ring is arranged on the piston, a piston sealing ring is arranged on the piston, a linear displacement sensor is arranged in the piston rod, a communicating pipe is arranged in the cylinder bottom, and the shaft guide ring, the shaft buffer seal, the piston rod sealing ring and the dust ring are sequentially arranged on the inner wall of the guide sleeve and are in contact with the piston rod; the cylinder opening is hermetically arranged on the outer wall of the guide sleeve and used for sealing the guide sleeve and the cylinder barrel; the piston sealing ring and the guide ring for the hole are arranged on the outer wall of the piston and are contacted with the inner wall of the cylinder barrel;
The piston rod sealing ring comprises a first elastomer and a first wear-resistant ring, and the inner side wall of the first wear-resistant ring is sleeved on the inner side wall of the first elastomer; the inner side wall of the first elastic body is provided with a first protruding part, and the middle thickness of the first protruding part is larger than the thickness of the two ends; the outer side wall of the first wear-resistant ring is provided with a compensation layer, and the compensation layer is attached to the first protruding part; the inner side wall of the first wear-resistant ring is provided with a second protruding part; the material of the first elastomer is nitrile rubber, and the material of the first wear-resistant ring is hydrolysis-resistant modified wear-resistant self-lubricating polyurethane material, modified ultra-high molecular weight polyethylene or modified polytetrafluoroethylene;
the piston sealing ring comprises a second elastomer and a second wear-resistant ring, and the inner side wall of the second wear-resistant ring is sleeved on the outer side wall of the second elastomer; the section of the second elastic body is T-shaped, support ring grooves are formed in the two ends of the second elastic body, L-shaped support rings are arranged in the support ring grooves, and the second wear-resistant ring is arranged between the L-shaped support rings; the outer side wall of the second wear-resistant ring is provided with a third protruding part, and the middle thickness of the third protruding part is larger than the thickness of the two ends; the material of the second elastomer is nitrile rubber, and the material of the second wear-resistant ring is hydrolysis-resistant modified wear-resistant self-lubricating polyurethane material, modified ultra-high molecular weight polyethylene or modified polytetrafluoroethylene; the material of the L-shaped support ring is a carbon fiber modified polyoxymethylene material;
Three guide rings for shafts in the guide sleeve are arranged, and the guide rings for shafts are in sliding connection with the piston rod; two guide rings for holes are respectively arranged on two sides of the piston sealing ring, and the guide rings for holes are in sliding connection with the cylinder barrel;
The guide sleeve is formed by connecting a guide sleeve assembly A and a guide sleeve assembly B through threads, and a piston rod sealing groove is formed at the joint of the end surfaces of the guide sleeve assembly A and the guide sleeve assembly B and used for placing a piston rod sealing ring.
2. The hydraulic support aqueous medium pushing jack sealing device according to claim 1, wherein the dustproof ring is an umbrella-shaped double-lip dustproof ring, a clamping groove is formed in the outer side of the dustproof ring, the clamping groove is connected with the guide sleeve in a clamping mode, a conical surface is formed in the inner side of the dustproof ring, and a fourth protruding portion is formed in the inner side of the dustproof ring.
3. The hydraulic support aqueous medium pushing jack sealing device according to claim 1, wherein the shaft buffer seal is located between the shaft guide ring and the piston rod sealing ring.
4. The hydraulic support aqueous medium pushing jack sealing device according to claim 1, wherein a cylinder port seal is arranged on the outer side surface of the guide sleeve, and the cylinder port seal is connected with the inner wall of the cylinder barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410438511.5A CN118026026B (en) | 2024-04-12 | 2024-04-12 | Hydraulic support aqueous medium pushing jack sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410438511.5A CN118026026B (en) | 2024-04-12 | 2024-04-12 | Hydraulic support aqueous medium pushing jack sealing device |
Publications (2)
| Publication Number | Publication Date |
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| CN118026026A CN118026026A (en) | 2024-05-14 |
| CN118026026B true CN118026026B (en) | 2024-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410438511.5A Active CN118026026B (en) | 2024-04-12 | 2024-04-12 | Hydraulic support aqueous medium pushing jack sealing device |
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| CN (1) | CN118026026B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN118026026A (en) | 2024-05-14 |
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