CN214465777U

CN214465777U - Viscous damper with excellent sealing performance

Info

Publication number: CN214465777U
Application number: CN202120182662.0U
Authority: CN
Inventors: 宁浩
Original assignee: Yunnan Xinkong Shock Absorption Technology Co ltd
Current assignee: Yunnan Xinkong Shock Absorption Technology Co ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-10-22
Anticipated expiration: 2031-01-22

Abstract

The invention relates to the technical field of viscous dampers, and particularly discloses a viscous damper with excellent sealing property, which comprises a piston rod, a piston, a main cylinder barrel, an auxiliary cylinder and an oil-free bush, wherein the piston is arranged in the main cylinder barrel, the two ends of the main cylinder barrel are symmetrically provided with the oil-free bush, the piston rod is fixedly connected with the piston through a screw and penetrates through the oil-free bush at the two ends of the main cylinder barrel, the outer ring of the oil-free bush is sealed with the main cylinder barrel through 2 groups of sealing elements, the sealing element used in the outer ring is an O-shaped ring and a check ring, the inner ring is sealed with the piston rod through 3 groups of sealing elements, and the 3 groups of sealing elements are respectively a dust ring, a Y-shaped ring and a check ring, in the aspect of sealing design, the inner ring and the outer ring of the oil-free bush respectively adopt different series sealing schemes, so that the sealing property of the viscous damper can reach a complete sealing state with zero leakage, and the service life of the seal ring is greatly prolonged by selecting materials of the check ring and the check ring, the durability of the viscous damper is improved.

Description

Viscous damper with excellent sealing performance

Technical Field

The invention relates to the technical field of viscous dampers, in particular to a viscous damper with excellent sealing property.

Background

The viscous damper is a passive speed-related energy dissipation device, generates damping force when viscous liquid passes through a damping hole and a damping gap, and is used for resisting impact force caused by earthquake or strong wind to a building structure temporarily.

Through continuous scientific research and engineering examples, the viscous damper is widely used as a double-rod-out pore type damper on a building structure at present, the damper is required to work effectively under large load, large stroke, short time, small load and small stroke for a long time, the internal pressure of 100MPa is achieved during normal work, and the durability of the viscous damper is over 35 years. In engineering projects, viscous liquid leaks out of a main cylinder due to poor sealing performance, internal pressure is reduced by more than 10%, so that the damper loses design energy consumption requirements, and the main reasons are that the sealing design is unreasonable, the wear resistance of a conventional bushing used in a matched mode is poor, and a sealing element is damaged due to materials and the like. The sealing of viscous dampers has always been the primary technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the invention provides the viscous damper with excellent sealing property, so that the sealing property of the damper is improved, and the durability of the product is improved.

The utility model provides a sealed good viscous damper, includes piston rod, piston, main cylinder, vice jar, oil-free bush, the inside piston that is provided with of main cylinder, both ends symmetry are provided with oil-free bush, and the screw fastening connection is used between piston rod and the piston to run through the oil-free bush at main cylinder both ends, vice jar sets up in main cylinder both ends, fills viscous liquid between oil-free bush and the piston, and oil-free bush's outer lane uses 2 groups of sealing member and main cylinder to seal, and the sealing member that the outer lane used is O type circle + retaining ring, and the inner circle uses 3 groups of sealing member and piston rod to seal, 3 groups of sealing member are dust ring, Y type circle + retaining ring combination, ste circle respectively, main cylinder both ends are installed gland nut respectively and vice jar are sealed concrete, the inner wall that does not have oil-based bush adopts the copper base alloy preparation, and graphite inlays the material.

The oil-free bushing is made of steel, copper-based alloy is sintered on the inner wall of the oil-free bushing, and graphite materials are embedded in the oil-free bushing, so that the lubricating and friction requirements of the piston rod during reciprocating motion in the bushing are met.

Specifically, the inner ring uses 3 groups of sealing elements, and a dust ring, a Y-shaped ring and check ring combination and a Steer seal ring are sequentially arranged from the oilless bushing to the viscous liquid direction.

Preferably, the steckel ring is a DSJ steckel ring, the dust ring is made of NBR (nitrile-butadiene rubber), the Y ring is made of polyurethane rubber, the dust ring is made of NBR to effectively isolate dust layer particles from entering the NBR, the piston rod and other components are abraded, the Y ring is made of polyurethane rubber, the service life of the Y ring is effectively prolonged by the combination of the check rings, the low-speed sealing effect is excellent, the outer ring of the steckel ring is a rubber O-shaped ring, the inner ring of the steckel ring is a polytetrafluoroethylene ring (PTFE), and the O-shaped ring provides enough sealing force and plays a compensation role for the polytetrafluoroethylene ring.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a viscous damper with excellent sealing, wherein in the design and processing of a part lining, an oil-free lining with an inner wall copper-based alloy and an embedded graphite material is used, and the viscous damper has the characteristics of small friction coefficient, wear resistance, corrosion resistance, avoidance of occlusion and the like, and is more suitable for the working condition of low-speed heavy-load reciprocating motion of the viscous damper; in the aspect of sealing design, the inner ring and the outer ring of the oilless bushing respectively adopt different series sealing schemes, so that the sealing of the viscous damper can reach a zero-leakage complete sealing state, the material of the Stent seal and the retainer ring is selected, the service life of the sealing element is greatly prolonged, and the durability of the viscous damper is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged partial schematic view of the present invention;

in the figure: 1-a piston rod, 2-a dustproof ring, 3-a Y-shaped ring and a check ring, 4-an O-shaped ring and a check ring, 5-a steckel seal, 6-viscous liquid, 7-a piston, 8-a main cylinder barrel, 9-an auxiliary cylinder, 10-a compression nut and 11-an oilless bushing.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the following embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in figure 1, the viscous damper with excellent sealing performance comprises a piston rod 1, a piston 7, a main cylinder barrel 8, an auxiliary cylinder 9 and an oilless bush 11, wherein the piston rod 1 and the piston 7 are fixedly connected by using screws, the oilless bush 11 is respectively arranged at two ends in the main cylinder barrel 8, the inner wall of the oilless bush is made of copper-based alloy and is embedded with graphite materials, viscous liquid 6 is filled between the piston 7 and the oilless bush 11, the piston rod 1 reciprocates in the main cylinder barrel 8 and the auxiliary cylinder 9, a damping hole is formed in the piston, and a gap channel is arranged between the viscous liquid and the main cylinder barrel 8, the viscous liquid 6 flows in the damping hole and the gap channel, the inner ring and the outer ring of the oilless bush are respectively in sealing fit with the main cylinder barrel and the piston rod, the outer ring of the oilless bush is sealed with the main cylinder barrel by 2 groups of sealing elements, the inner ring is sealed with the piston rod by 3 groups of sealing elements, and the two ends of the main cylinder barrel are respectively provided with a compression nut 10 and an auxiliary cylinder for sealing.

In the embodiment, wherein 11 outer lanes of oilless bush use the combination seal and the sealed cooperation of main cylinder section of thick bamboo of 2 groups O type circle + retaining ring, O type circle + retaining ring structure is a set of, and 3 groups of sealing members that the inner circle used are in proper order from oilless bush to viscous fluid direction: the combined seal of the dust ring 2, the Y-shaped ring, the retainer ring 3 and the Stent seal 5 is in sealing fit with the piston rod 1.

Wherein gland nut 10 and vice jar 9 pass through threaded connection on main cylinder 8, hug closely and compress tightly oilless bush 11, set up the oil filler point on the oilless bush 11, pour into viscous liquid 6 after the installation.

The implementation principle of the invention is as follows: the damping structure is provided with a viscous damper, when an earthquake occurs, a piston rod 1 of the viscous damper drives a piston 7 to reciprocate in a main cylinder 8, viscous liquid is pulled and pressed to do fluid motion in the main cylinder 8 and pass through a gap between the cylinder and the piston and a damping hole on the piston in a reciprocating way,

in this process, the internal pressure in the main cylinder rises, the viscosity rises, and the seismic energy consumption is absorbed, thereby protecting the main structure. Under the requirement of high pressure inside and long durability, the sealing condition of the oil-free bushing is guaranteed to the maximum extent, the oil-free bushing which is more complex in manufacturing process and meets the requirement of working conditions uses different series seals on the inner ring and the outer ring, and the completely sealed state of zero leakage is achieved.

The copper-based alloy on the inner wall of the oilless bushing is processed by adopting a sintering process and embedding a graphite material, and has the characteristics of small friction coefficient, wear resistance, corrosion resistance, avoidance of occlusion and the like.

The 2 groups of sealing components used by the oilless bushing outer ring are: the combined seal of O type circle + retaining ring, 3 groups of sealing members that the inner circle used do in proper order: the combination of the dustproof ring, the Y-shaped ring, the check ring and the Stent seal is sealed. Wherein the dust ring adopts the material to be the effective entering of keeping apart the ash bed granule of NBR, subassembly such as wearing and tearing piston rod, and the Y circle uses polyurethane rubber material, and the combination of retaining ring has effectively promoted life in addition, and the low-speed is sealed effectual, and the outer lane of DSJ steckel is rubber O type circle, and the inner circle is polytetrafluoroethylene circle (PTFE), and the O circle provides sufficient sealing force, plays the compensatory action to polytetrafluoroethylene circle.

The above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a sealed good viscous damper, includes piston rod, piston, main cylinder, vice jar, oil-free bush, the inside piston that is provided with of main cylinder, both ends symmetry are provided with oil-free bush, and the screw fastening connection is used between piston rod and the piston to run through the oil-free bush at main cylinder both ends, vice jar sets up in main cylinder both ends, fills viscous liquid between oil-free bush and the piston, and its characterized in that, oil-free bush's outer lane uses 2 sealing members of group and main cylinder to seal, and the sealing member that the outer lane used is O type circle + retaining ring, and the inner circle uses 3 sealing members of group to seal with the piston rod, 3 sealing members are dust ring, Y type circle + retaining ring combination, ste seal respectively for main cylinder both ends, main cylinder installs gland nut and vice jar respectively and seals.

2. The viscous damper with excellent sealing performance as claimed in claim 1, wherein the inner wall of the oil-free liner is made of copper-based alloy and is embedded with graphite material.

3. The viscous damper with excellent sealing performance as claimed in claim 1, wherein the inner ring uses 3 sets of sealing elements, and the dust-proof ring, the Y-shaped ring + retaining ring combination and the Stepper ring are arranged in sequence from the oilless bushing to the viscous liquid direction.

4. The viscous damper with excellent sealing performance as claimed in claim 1 or 3, wherein the Style ring is DSJ Style ring, the dust ring is NBR, and the Y ring is made of urethane rubber.