CN114962524A

CN114962524A - Hydraulic damper and high-pressure sealing guide system for hydraulic damper

Info

Publication number: CN114962524A
Application number: CN202210389973.3A
Authority: CN
Inventors: 杜祥冲; 安硕
Original assignee: Suspa Nanjing Vibration Damping System Co ltd
Current assignee: Suspa Nanjing Vibration Damping System Co ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-08-30

Abstract

The invention discloses a hydraulic damper and a high-pressure sealing guide system for the same, wherein the high-pressure sealing guide system comprises a high-pressure sealing check ring assembly, the high-pressure sealing check ring assembly comprises a check ring main body, a first sealing groove is formed in the inner ring at the top of the check ring main body, and a first sealing element is arranged in the first sealing groove; a second sealing groove is formed in the lower side of the outer ring of the retainer ring main body, and a second sealing piece is arranged in the second sealing groove; the first sealing element is axially limited above through a limiting gasket, and the retainer ring main body is in limiting connection with the inner wall of the cylinder barrel of the hydraulic damper. The hydraulic damper adopts the high-pressure check ring, the sealing element and the like to form a multiple independent sealing structure, particularly adopts the specially designed high-pressure sealing check ring structure, can effectively prevent high pressure from acting on the sealing element, and has the advantages of good sealing performance, high protection level, long service life and the like.

Description

Hydraulic damper and high-pressure sealing guide system for hydraulic damper

Technical Field

The invention relates to the technical field of hydraulic damping, in particular to a hydraulic damper and a high-pressure sealing guide system for the hydraulic damper.

Background

With the rapid development of new energy technology, solar power stations are rapidly popularized in the world, solar energy can be converted into electric energy by photovoltaic panels, the solar power stations are built in regions with sufficient illumination such as deserts or seasides at present, and the solar energy is converted into the electric energy by photovoltaic panel arrays so as to relieve the energy fatigue phenomenon. However, the photovoltaic panel vibrates violently under the action of strong wind load and is easy to break, so that how to reduce the vibration of the photovoltaic panel array under the action of wind load is one of the key problems of the solar power station at present.

At present, the hydraulic damper for vibration reduction of the solar photovoltaic panel has higher requirements on damping force, sealing performance, strength and the like, but the hydraulic damper for vibration reduction of the photovoltaic panel still has the following problems:

1) the sealing performance is poor, and the damping force is easy to lose efficacy due to oil leakage in the using process;

2) the piston rod is not protected, dust is easily adhered to the piston rod in the reciprocating process and enters the damper, and sealing and damping force are affected;

3) the cylinder end cover has small welding strength and short service life under the action of large damping force load;

4) the surface coating has poor aging resistance of a salt mist resistant machine and is easy to corrode;

5) the vibration of low amplitude high frequency or high amplitude low frequency cannot be effectively controlled.

Therefore, it is urgently needed to design a hydraulic damper suitable for vibration reduction of a photovoltaic panel, and high-pressure sealing performance, structural strength performance and corrosion and aging resistance can be fully guaranteed while large damping force can be provided.

Disclosure of Invention

The invention aims to: in order to overcome the defects in the prior art, the invention provides the hydraulic damper and the high-pressure sealing guide system for the hydraulic damper, which effectively improve the sealing property of the hydraulic damper through a multiple independent sealing structure so as to solve the problem that the damping force is invalid due to the fact that the hydraulic damper is easy to leak oil, and have the advantages of good sealing property, high protection level, long service life and the like.

The technical scheme is as follows: in order to achieve the purpose, the invention provides a high-pressure seal guiding system for a hydraulic damper, which comprises a high-pressure seal retainer ring assembly, wherein the high-pressure seal retainer ring assembly comprises a retainer ring main body, a first seal groove is formed in the inner ring at the top of the retainer ring main body, and a first seal is arranged in the first seal groove; a second sealing groove is formed in the lower side of the outer ring of the retainer ring main body, and a second sealing piece is arranged in the second sealing groove; the upper part of the first sealing element is axially limited through a limiting gasket, and the retainer ring main body is in limiting connection with the cylinder barrel of the hydraulic damper.

The high-pressure sealing retainer ring assembly comprises an inner sealing structure and an outer sealing structure, wherein the first sealing element is used for realizing effective sealing of the surface of the piston rod, the second sealing element is used for realizing effective sealing of the inner wall of the cylinder barrel, and meanwhile, the bearing effect of the retainer ring main body can effectively prevent high pressure from acting on the sealing element, so that the high-pressure sealing retainer ring assembly has the advantages of stable sealing, long service life and the like.

Furthermore, a stepped groove used for accommodating a limiting gasket is formed in the upper portion of the first sealing groove, and the limiting gasket is axially limited through a mechanical extrusion structure.

Furthermore, the high-pressure seal guiding system further comprises a third seal assembly located below the high-pressure seal retainer ring assembly, the third seal assembly comprises a fourth seal element and a guide block, and the guide block is in limit connection with the cylinder barrel.

Furthermore, a second sealing assembly is further arranged between the first sealing assembly and the third sealing assembly, the second sealing assembly comprises a third sealing element, a sealing ring and a fixing ring, and the fixing ring is in limit connection with the cylinder barrel.

Wherein retaining ring main part, solid fixed ring and guide block are connected with the cylinder is spacing respectively, are used for realizing first seal assembly, second seal assembly and third seal assembly's independent spacing respectively, realize three independent sealings from this.

Furthermore, the retaining ring main part is equipped with the oil storage tank with solid fixed ring's bottom inner circle for store lubricating oil, and then improve the life of third sealing member, fourth sealing member.

Furthermore, the retainer ring main body and the fixing ring are respectively fixed on the inner wall of the cylinder barrel in a limiting manner through a mechanical extrusion structure, and the guide block is limited by bending the bottom of the cylinder barrel.

In addition, the invention also provides a hydraulic damper, which comprises a cylinder barrel and a piston rod, wherein the bottom of the cylinder barrel is provided with the high-pressure seal guide system for realizing the penetrating guide seal of the piston rod.

Furthermore, the top welding of cylinder has the threaded end cover for threaded connection erection joint, the external diameter of threaded end cover is not less than the cylinder internal diameter, and is not more than the cylinder external diameter, and the axial of cylinder section of thick bamboo wall bears greatly, and fatigue life is long.

Furthermore, the bottom cover of cylinder has the dust cover, and the dust cover is equipped with two lip seal structures with the junction of piston rod for realize the dual seal protection.

Further, the outer sleeve extending to the outer side of the cylinder barrel is sleeved at the bottom of the piston rod and used for achieving dustproof sealing protection, the lower end of the piston rod is of a threaded structure with an axial tangent plane, a notch matched with the lower end of the piston rod is formed in the bottom of the outer sleeve, and the lower end of the piston rod penetrates through the notch and then is connected with an installing joint in a threaded mode.

Has the advantages that: compared with the prior art, the hydraulic damper and the high-pressure sealing guide system for the hydraulic damper have the advantages that:

1. the single-cylinder hydraulic damper adopts a high-pressure check ring, a sealing ring and the like to form a multiple independent sealing structure for the first time, and particularly adopts a specially designed high-pressure sealing check ring assembly to fully ensure the sealing property under the condition of large damping;

2. an outer sleeve is added outside the piston rod to realize dustproof sealing protection so as to avoid dust from being adhered to the piston rod to influence sealing and damping force, and meanwhile, the outer sleeve and the piston rod are matched by adopting a tangent plane structure to realize torsion limitation and facilitate joint installation;

3. the threaded end cover is welded on the cylinder barrel wall, so that the fatigue service life under the condition of large damping force is prolonged, and meanwhile, the salt mist-resistant and aging-resistant single-coating paint is adopted on the surfaces of the sleeve and the cylinder barrel, so that the corrosion resistance and aging resistance are further improved;

4. the damping device can provide large damping force at a low speed, effectively reduces vibration of the photovoltaic panel, and solves the problem that the photovoltaic panel of the solar power station is severely vibrated and damaged due to wind load.

Drawings

FIG. 1 is a schematic structural diagram of a high-pressure gasket assembly according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a retainer ring main body according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a high pressure seal guiding system according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a hydraulic damper according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a base valve assembly in an embodiment of the present invention;

FIG. 6 is a schematic structural view of a piston assembly in an embodiment of the present invention;

FIG. 7 is a schematic view of the connection structure of the piston rod and the outer sleeve in the embodiment of the present invention;

the drawing comprises the following steps: 1. a threaded end cap, 2, a cylinder barrel, 3, a bottom valve assembly, 4, a piston assembly, 5, a piston rod, 6, a high-pressure seal guide system, 7, a dust cover, 8, an outer sleeve, 9, a compensation cavity, 10, a working cavity, 11, a damping medium, 12, a mounting joint, 31, a valve body, 32, a sealing ring, 33, a spring, 34, a valve pin, 35, a bottom valve plate, 36, a valve plate, 37, a locking nut, 361, an overflow hole, 362, an overflow groove, 41, a guide gasket, 42, a pressure stabilizing gasket, 43, a gasket, 44, a compression valve plate, 45, a piston main body, 46, a piston ring, 47, a tension valve plate, 48, a limit nut, 49, a rotary structure, 451, an oil passing groove, 452, an oil passing hole, 61, a high-pressure seal retainer ring assembly, 62, a third seal ring, 63, a seal ring, 64, a fixed ring, 65, a fourth oil hole, 66, a guide block, 611 and a retainer ring main body, 612. the sealing structure comprises a second sealing element 613, a first sealing element 614, a limiting gasket 6111, a first sealing groove 6112, a second sealing groove 6113, a stepped groove 6114, an oil storage groove 81, a rectangular groove 82 and a water drainage hole.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings to more clearly and completely illustrate the technical solutions of the present invention.

Fig. 1 shows a high-pressure sealing retainer ring assembly, which includes a retainer ring main body 611 shown in fig. 2, wherein a first sealing groove 6111 is formed in an inner ring at the top of the retainer ring main body 611, and a first sealing element 613 is arranged in the first sealing groove 6111; a stepped groove 6113 is formed above the first sealing groove 6111, a limiting gasket 614 is arranged in the stepped groove 6113, and axial limiting is achieved above the limiting gasket 614 through press riveting or other limiting structures; a second sealing groove 6112 is formed in the lower side of the outer ring of the retainer ring main body 611, and a second sealing element 612 is arranged in the second sealing groove 6112.

As shown in fig. 3, a high-pressure seal guiding system includes a first seal assembly, a second seal assembly and a third seal assembly, wherein the first seal assembly employs the above-mentioned high-pressure seal retainer ring assembly 61, the second seal assembly includes a third seal 62, a seal ring 63 and a fixing ring 64, and the third seal assembly includes a fourth seal 65 and a guide block 66.

The first seal 613 may be provided as a gurley ring, a gas seal, an oil seal, etc., the second seal 612 may be provided as an O-ring or a sealing ring, and the third seal 62, the fourth seal 65 may be provided as a gas seal, an oil seal, etc. Further, oil storage grooves 6114 are formed in the bottoms of the retainer ring main body 611 and the fixing ring 64 and used for storing lubricating oil, and therefore the service lives of the third sealing element and the fourth sealing element are prolonged.

During installation, the retainer ring main body 611 and the fixing ring 64 can be fixed on the inner wall of the cylinder barrel 2 in a rolling or riveting mode, and the bottom of the guide block 66 is limited by bending the bottom of the cylinder barrel 2, so that three independent sealing structures are formed. The fixing ring is used for supporting the third sealing element and the sealing ring to protect the fourth sealing element, and the fourth sealing element is supported through the guide block.

As shown in fig. 4, a hydraulic damper for vibration reduction of a photovoltaic panel includes a cylinder barrel 2 and a piston rod 5, the top of the cylinder barrel 2 is provided with a bottom valve assembly 3, the bottom of the cylinder barrel 2 is provided with the high-pressure sealing guide system 6, the cylinder barrel 2 is divided into a working chamber 10 and a compensation chamber 9 by the bottom valve assembly 3, the working chamber 10 is filled with a damping medium 11, the damping medium 11 can be set to hydraulic oil or other media, the piston rod 5 penetrates through the high-pressure sealing guide system 6 and extends into the working chamber 10, the piston rod 5 in the working chamber 10 is provided with the piston assembly 4, and the piston rod 5 drives the piston assembly 4 to reciprocate in the working chamber 10.

As shown in fig. 5, the bottom valve assembly 3 includes a valve body 31, a valve pin 34, a valve disc 36, wherein the top of the valve body 31 is fixed in a limiting manner by a first limiting structure on the inner wall of the cylinder barrel 2, the outer ring of the valve body 31 is further provided with a sealing groove and a limiting groove which are arranged up and down, a sealing ring 32 is arranged in the sealing groove, the sealing ring 32 can be arranged as an O-shaped ring or a sealing ring, the limiting groove is in limiting fit with a second limiting structure on the inner wall of the cylinder barrel 2, and the first limiting structure and the second limiting structure can adopt point riveting, pressure riveting or other limiting structures.

The valve pin 34 is arranged in a central hole of the valve body 31 in a penetrating way, the bottom end of the valve pin extends out of the valve body 31, the valve disc 36 is arranged at the bottom end of the valve pin 34 through a locking nut 37, and a one-way sealing structure is formed through a spring 33 on the valve pin 34; an overflow hole 361 is formed in the valve disc 36, and a bottom valve plate 35 for blocking the overflow hole 361 is arranged on the valve disc 36.

In the compression process of the piston assembly 4, the damping medium 11 flushes the bottom valve plate 35 through the overflow hole 361, and at the moment, the bottom valve plate 35 generates damping force in the compression direction, so that the damping force is prevented from rising too fast, and the effect of stabilizing the damping force is achieved; during the retraction of the piston assembly 4, since the air pressure in the compensation chamber 9 is higher than the air pressure in the working chamber 10, the air pressure difference presses the valve disc 36 to open downwards against the action of the spring 33, and the damping medium 11 in the compensation chamber 9 returns to the working chamber 10.

In addition, the valve disc 36 is provided with a flow-through groove 362 on the mating surface with the valve body 31, and during the slow compression of the piston assembly 4, the bottom valve plate 35 is hard to open, and the damping medium 11 enters the compensation chamber 9 through the flow-through groove 362.

As shown in fig. 6, the piston assembly 4 includes a piston main body 45 sleeved on the piston rod 5, wherein a tensile valve plate 47, a valve plate gasket 43, a pressure stabilizing gasket 42, and a limit nut 48 are sequentially sleeved above the piston main body 45, and the limit nut 48 realizes axial limit through a spin riveting structure 49 at the top end of the piston rod 5; the compression valve plate 44, the valve plate gasket 43, the pressure stabilizing gasket 42 and the guide gasket 41 are sequentially sleeved below the piston main body 45, the guide gasket 41 is in limit fit with a shaft shoulder on the piston rod 5, and the sliding stability of the large-thickness piston assembly is guaranteed through the guide gasket 41.

And a piston ring 46 is arranged in an outer groove of the piston main body 45 to form a cylinder barrel dynamic seal. The oil holes 452 are formed in two sides of the piston main body 45, so that in the compression process of the piston rod 5, the damping medium 11 passes through the oil hole 452 on one side to open the compression valve plate 44 to form a compression direction damping force, and in the stretching process of the piston rod 5, the damping medium 11 passes through the oil hole 452 on the other side to open the stretching valve plate 47 to form a stretching direction damping force.

In addition, the piston main body 45 is further provided with an oil passing groove 451 communicated with the oil passing hole 452, and the damping medium 11 passes through the piston assembly 4 through the oil passing groove 451, so that the piston assembly 4 can move slowly, and damping control at a low speed is realized.

Further, the top of the cylinder barrel 2 is welded with a threaded end cover 1 for being in threaded connection with an installation connector 12, and the hollow end cover can be welded at the edge through a resistance welding or laser welding process. The external diameter of the threaded end cover 1 is equal to the internal diameter of the cylinder barrel 2, so that the stress of the threaded end cover directly acts on the barrel wall of the cylinder barrel, and compared with an end face which is easy to break, the axial bearing of the barrel wall of the cylinder barrel is large, and the fatigue life is long.

Furthermore, the bottom cover of cylinder 2 has dust cover 7, and the dust cover 7 is equipped with two lip seal structures with the junction of piston rod 5 for realize double seal protection.

Further, the bottom of the piston rod 5 is sleeved with an outer sleeve 8 extending to the outer side of the cylinder barrel 2, the outer sleeve is made of aging-resistant nylon or other materials, and the bottom of the outer sleeve 8 is provided with a water drainage hole 82 to prevent water and dust in the pipe.

As shown in fig. 7, the lower end of the piston rod 5 is a threaded rectangular structure, the bottom of the outer sleeve 8 is provided with a rectangular groove 81 matched with the lower end of the piston rod 5, and the lower end of the piston rod 5 passes through the rectangular groove 81 and then is further connected with the mounting joint 12 in a threaded manner. The piston rod 5 and the outer sleeve 8 are matched in a rectangular structure, so that torsion limitation is realized, and the joint is convenient to install.

Furthermore, the surfaces of the outer sleeve 8 and the cylinder barrel 2 are protected by a single coating which is ageing-resistant and salt mist-resistant, and the surface of the piston rod 5 is subjected to carbonitriding surface treatment, so that the piston rod is suitable for different environments such as seaside and desert.

The above detailed description merely describes preferred embodiments of the present invention and does not limit the scope of the present invention. Without departing from the spirit and scope of the present invention, it should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. The high-pressure sealing guide system for the hydraulic damper is characterized by comprising a high-pressure sealing retainer ring assembly (61), wherein the high-pressure sealing retainer ring assembly (61) comprises a retainer ring main body (611), a first sealing groove (6111) is formed in an inner ring at the top of the retainer ring main body (611), and a first sealing element (613) is arranged in the first sealing groove (6111); a second sealing groove (6112) is formed in the lower side of the outer ring of the retainer ring main body (611), and a second sealing element (612) is arranged in the second sealing groove (6112); the upper part of the first sealing element (613) is axially limited by a limiting gasket (614), and the retainer ring main body (611) is in limiting connection with the cylinder barrel (2) of the hydraulic damper.

2. The high-pressure seal guiding system for the hydraulic damper as recited in claim 1, wherein a stepped groove (6113) for accommodating the limit gasket (614) is formed above the first seal groove (6111), and the limit gasket (614) realizes axial limit through a mechanical extrusion structure.

3. The high-pressure seal guide system for the hydraulic damper as recited in claim 1, further comprising a third seal assembly located below the high-pressure seal retainer assembly (61), wherein the third seal assembly comprises a fourth seal member (65) and a guide block (66), and the guide block (66) is in limit connection with the cylinder barrel (2).

4. The high-pressure seal guiding system for the hydraulic damper is characterized in that a second seal assembly is further arranged between the first seal assembly and the third seal assembly, the second seal assembly comprises a third seal member (62), a seal ring (63) and a fixing ring (64), and the fixing ring (64) is in limit connection with the cylinder barrel (2).

5. The high-pressure seal guide system for the hydraulic damper as claimed in claim 4, wherein the retainer ring body (611) and the bottom inner ring of the fixing ring (64) are provided with oil reservoirs (6114).

6. The high-pressure seal guide system for the hydraulic damper is characterized in that the retainer ring main body (611) and the fixing ring (64) are respectively limited and fixed with the inner wall of the cylinder barrel (2) through a mechanical extrusion structure, and the guide block (66) is limited through bending of the bottom of the cylinder barrel (2).

7. A hydraulic damper, characterized in that, including the cylinder (2), the piston rod (5), the bottom of the said cylinder (2) is equipped with the high-pressure seal guiding system (6) as in any claim 1-6, used for realizing the piston rod (5) runs through the guide seal.

8. A hydraulic damper according to claim 7, characterized in that the top of the cylinder (2) is welded with a threaded end cap (1) for screwing a mounting joint (12), the outer diameter of the threaded end cap (1) is not smaller than the inner diameter of the cylinder (2) and not larger than the outer diameter of the cylinder (2).

9. The hydraulic damper as claimed in claim 7, characterized in that the bottom of the cylinder (2) is sleeved with a dust cover (7), and the joint of the dust cover (7) and the piston rod (5) is provided with a double-lip sealing structure.

10. The hydraulic damper as recited in claim 7, characterized in that the bottom of the piston rod (5) is sleeved with an outer sleeve (8) extending to the outside of the cylinder (2), the lower end of the piston rod (5) is a threaded structure with an axial tangent plane, the bottom of the outer sleeve (8) is provided with a notch matched with the lower end of the piston rod (5), and the lower end of the piston rod (5) passes through the notch and then is further connected with the mounting joint (12) in a threaded manner.