CN201412473Y - High output quick response damper - Google Patents

Abstract

The large output quick response damper is a large tonnage viscous damper with simple design, convenient processing and stable performance. There is a piston (8) in the middle of the main cylinder (5), and guide sleeves (4) are provided at both ends, and the inner end of the guide rod (2) is located in the piston (8) and the two guide sleeves (4) ;A bimetal sliding bearing (17) is set between the guide sleeve (4) and the guide rod (2); one end of the main cylinder (5) is sealed with a compression nut (3), and the other end is connected by a connecting nut (11) The auxiliary cylinder (12), the cavity at both ends of the piston (8) is filled with damping medium (21); the outer end of the auxiliary cylinder (12) is connected with the auxiliary cylinder earrings (14) through the connecting nut (13); in the piston ( 8) is equipped with a spiral hole type damping device, the damping device is formed by inserting the damping rod (9) in the symmetrical channel (25) of the piston (8), and the outer surface of the damping rod (9) is processed with a spiral groove ( 23), the piston (8) is assembled in the middle position of the guide rod (2) by means of the pressing plate (6) and the half-ring key (7).

Description

High output quick response damper

technical field

The utility model relates to an engineering structure damping device, which can effectively restrain the structural vibration response of the engineering structure under the action of earthquake and wind vibration.

Background technique

The research on structural vibration control using viscous dampers first started in military enterprises in developed countries. With the deepening of research, this technology has gradually entered the civilian field, such as aerospace, railway locomotives, automobiles, mechanical equipment and civil engineering, etc. , have achieved satisfactory results. Up to now, viscous dampers have been used in hundreds of projects around the world, involving various structural forms such as high-rise buildings, towering structures, bridges, railways, stadiums, offshore oil platforms and even satellite launch towers.

For the sake of commercial interests, there are only some general introductions to this kind of products in foreign countries, and there are few technical materials such as detailed design, production and application, and they are in a technology monopoly position. Domestic research on viscous dampers started relatively late, and the current development of viscous dampers has a relatively simple structure and immature technology. In addition, research on dampers with different structural forms will help to develop dampers with stronger energy dissipation capacity and more stable performance.

Conventional viscous dampers are subject to many technical restrictions in order to meet the engineering design requirements for large tonnage, and due to processing technology and sealing problems, the service life of the damper is often affected by leakage. Therefore, a spiral hole type viscous damper has been developed, which has the advantages of large output force, strong energy dissipation capacity, stable mechanical properties, good impermeability and long service life.

Contents of the invention

Technical problem: In order to overcome the shortcomings of conventional viscous dampers, the utility model provides a large-tonnage, high-efficiency, and fast-response damper with simple design, convenient processing, and stable performance.

Technical solution: The large-output quick-response damper of the utility model takes the main cylinder as the main body, and a piston is arranged in the middle of the main cylinder, and guide sleeves are provided at both ends, and the inner end of the guide rod is located between the piston and the two guides. In the sleeve, the outer end of the guide rod is connected with the connecting earring; a bimetallic sliding bearing is set between the guide sleeve and the guide rod; one end of the main cylinder is sealed with a compression nut, and the other end is connected to the auxiliary cylinder through a connecting nut. The cavity at both ends of the piston in the cylinder is filled with damping medium; the outer end of the auxiliary cylinder is connected to the earrings of the auxiliary cylinder through a connecting nut; a spiral hole type damping device is arranged in the piston, and the damping device is inserted into the piston by a damping rod. It is formed in the symmetrical channel, and the outer surface of the damping rod is processed with a spiral groove, and the piston is assembled in the middle of the guide rod by means of a pressure plate and a half-ring key.

The guide sleeve and the guide rod are sealed by a rectangular sealing ring and the polyurethane oil seal for the shaft, and the guide sleeve and the cylinder are sealed by three rubber II O-rings.

The hole between the piston and the main cylinder is jointly sealed with a polyurethane oil seal and a polytetrafluoroethylene rectangular wear-resistant ring.

The rubber II O-ring is used for sealing between the piston and the guide rod.

Beneficial effects: the utility model provides a large-tonnage viscous damper with simple design, convenient processing and stable performance. The damper forms a damping channel through the cooperation between the damping rod channel and the piston hole; the spiral channel arranged on the outer surface of the damping rod is not only convenient for batch processing, but also doubles the damping channel in a limited space. Effectively improve the output damping force of the damper and increase the energy dissipation and vibration reduction effect of the damper.

The processing technology of the damper cylinder, guide rod, piston and other parts and the sealing measures of multiple fortifications effectively enhance the anti-seepage ability of the damper and prolong the service life of the damper.

The "no axial gap" structure of the piston ensures the synchronous movement of the piston and the guide rod. The damper can respond to the structural vibration immediately and quickly consume the vibration energy input from the outside to ensure the safety of the structure.

Description of drawings

The utility model is further described below in conjunction with accompanying drawings and embodiments.

Fig. 1 is the appearance schematic diagram of the utility model;

Fig. 2 is a schematic diagram of the longitudinal section structure of the damper structure;

Figure 3 is a schematic diagram of the partial assembly structure of the damper cylinder head;

Figure 4 is a schematic diagram of the assembly structure of the damper piston;

Fig. 5 is a processing diagram of the damper piston;

Fig. 6 is a sectional view of Fig. 5A-A;

Figure 7 is a large sample diagram of the damping rod.

In the figure: connecting earring 1; guide rod 2; compression nut 3; guide sleeve 4; main cylinder 5; pressure plate 6; half ring key 7; piston 8; damping rod 9; 11; Auxiliary cylinder 12; Connecting nut 13; Auxiliary cylinder earrings 14; Rectangular sealing ring 15; Shaft polyurethane oil seal 16; Bimetallic sliding bearing 17; Polytetrafluoroethylene rectangular wear-resistant ring 18; Rubber IIO ring 19; Hole Use polyurethane oil seal 20; damping medium 21; rubber IIO ring 22; damping rod spiral channel 23; damping rod top surface channel 24;

Detailed ways

The large output and fast response damper of the utility model. It mainly includes main cylinder 5, auxiliary cylinder 12, guide rod 2, guide sleeve 4, bimetal sliding bearing 17, piston 8, damping rod 9, damping medium 21, connecting earring 1, auxiliary cylinder earring 14 and rectangular sealing ring 15 16, shaft polyurethane oil seal 16, rubber II O type ring 19, hole polyurethane oil seal 20, rubber IIO type ring 22, polytetrafluoroethylene rectangular wear ring 18 (see Fig. 1, Fig. 2). The guide rod 2 of the damper is connected to the piston 8 through a structure without axial clearance. The piston 8 is provided with a helical damping channel 23 (see Fig. 4 ), and a guide sleeve 4 is provided between the guide rod 2 and the cylinder 5. There are multiple seals between the cylinder 5, the guide sleeve 4 and the guide rod 2, the guide sleeve 4 and the cylinder 5 (see Figure 3 and Figure 4), and the two ends of the damper are respectively equipped with connecting earrings connected to the outside world 1. Earrings 14 for the auxiliary cylinder.

The piston 8 of the damper of the present utility model is symmetrically provided with a channel 25 as required, and the diameter of the piston channel 25 is consistent with the diameter of the damping rod 9 (see Fig. 5 and Fig. 6 ). In order to effectively increase the length of the damping passage in the compact space on the piston 8, the damping passage is designed in a spiral form. It is technically infeasible to directly process a spiral channel in the piston, so it is designed to process a spiral channel 23 on the outer surface of the damping rod 9 (see Figure 7), and the damping channel is formed by the cooperation of the piston 8 and the damping rod 9 (see Figure 4 ). The tail end of the helical groove 23 of the damping rod should communicate with the groove 24 at the top of the damping rod 9 and be connected with the damping hole 10 on the pressure plate 6 to form a damping passage connecting the two ends of the piston 8 together.

The non-axial gap structure of the damper piston 8 in the utility model (see Fig. 4), through the cooperation of the pressing plate 6 and the half-ring key 7, the piston 8 and the guide rod 2 are locked, and there is no gap between each other, so that the piston 8 It can respond to external vibrations in real time through the guide rod 2 . Between the piston 8 and the cylinder 5, a polytetrafluoroethylene wear-resistant ring 18 and a polyurethane oil seal 20 for holes are provided.

During actual manufacture, first process a spiral groove 23 on the outer surface of the damping rod 9 according to the design parameters (section shape, size, pitch, etc., see Figure 7), then insert the processed damping rod 9 into the channel 25 on the piston 8, and then Assemble the piston at the middle position of the guide rod 2 with the help of the pressure plate 6 and the half-ring key 7, add a polytetrafluoroethylene rectangular wear-resistant ring 18 and a polyurethane oil seal 20 for the hole on the outside of the piston 8, and then assemble the two ends of the guide rod 2 A set of guide sleeve 4, a bimetal sliding bearing 17 is set between the guide sleeve 4 and the guide rod 2, and placed in the main cylinder 5, one end of the main cylinder 5 is added with a compression nut 3, and the other end is screwed on the main and auxiliary cylinders Connect the nut 11 and install the auxiliary cylinder 12, pour in the damping medium 21 and seal it, and finally add the connecting earrings 1 and the auxiliary cylinder earrings 14 at both ends of the damper to complete the production of the entire damper. During the assembly process, attention must be paid to the sealing of each part.

One end of the main cylinder of the damper is sealed with a compression nut, and the other end is connected to the auxiliary cylinder through a connecting nut. The cylinder is made of high-strength alloy steel seamless steel pipe, and the inner surface is cold-extruded, or honed and rolled. Pressing technology improves the density and precision of the inner surface of the cylinder, enhances wear resistance, and prevents leakage caused by roughening or scratching of the piston during work.

The damper guide rod is made of high-strength alloy steel solid guide rod. In addition to the processing accuracy requirements, the outer surface of the guide rod needs to be plated with hard chrome to enhance its strength, wear resistance and corrosion resistance, and avoid wear on the surface of the guide rod. It is beneficial to improve the sealing effect of the damper. For the damper used under harsh conditions, it is necessary to spray a layer of nickel-based alloy (nickel-chromium-borosilicate) material with a thickness of 0.2mm on the surface of the guide rod. ~1060), microscopically shows that the soft matrix (nickel base) is dispersed with high-hardness compound hard spots, which is a porous structure. This kind of organization has excellent self-lubricating properties and has good wear resistance for sealing materials. .

The damper head section consists of the gland nut, guide bushing and seal. A set of guide sleeves are assembled at both ends of the guide rod. The guide sleeve is ring-shaped and installed between the guide rod and the cylinder. One end is stuck on the cylinder through a card slot, and the outside is fixed to the cylinder through a compression nut. The traditional metal guide sleeve bears radial force and has poor wear resistance. Long-term work makes the gap between the guide rod and the guide sleeve too large, and the damper seal and working stability deteriorate, which in turn leads to leakage. Therefore, the present invention adopts the guide sleeve equipped with bimetallic sliding bearing (the surface coating is polytetrafluoroethylene), which can avoid direct contact between steel materials, reduce the friction between the guide sleeve and the moving guide rod, and effectively reduce the friction between the guide sleeve and the moving guide rod. The probability of scratches on the surface of the component can be improved, and its bending resistance, neutrality, self-lubricating and wear resistance can be improved, so as to ensure the working life of the damper. The guide sleeve and the guide rod are sealed by a rectangular sealing ring and the polyurethane oil seal for the shaft; the guide sleeve and the cylinder are sealed by three rubber II O-rings.

The piston of the utility model is designed with a "no axial gap" structure, and the piston and the guide rod are locked by the cooperation of the pressure plate and the half-ring key, thereby reducing the lagging influence of the piston on the guide rod during the movement process and ensuring the synchronization of the piston and the guide rod sports. This structure makes the damper very sensitive to vibration. Under the excitation of external energy input, the damper has a fast response speed and a full hysteretic curve, which can quickly achieve an obvious energy dissipation effect.

The seal between the piston and the cylinder adopts the method of joint use of polytetrafluoroethylene wear-resistant ring and rubber II O-type sealing ring. This method makes the friction coefficient between the piston and the cylinder very small, which can effectively reduce the reciprocation caused by the piston. The wear and tear of the cylinder due to movement can avoid the situation of cylinder scuffing and ensure the effective sealing between the piston and the cylinder. The rubber II O-ring is used for sealing between the piston and the guide rod.

The size and shape of the damping hole is one of the main factors affecting the performance of the damper. Two to six holes of the same size are symmetrically opened on the piston, and damping rods are installed in the holes, and the outer surface of the damping rods is processed with a helical damping channel. The size and specification of the damping rods are the same, only the section shape, size and pitch of the damping channel opened on it are changed. For the same damper, the dimensions of main components such as cylinder, guide rod and piston can remain unchanged, and different damping effects can be obtained only by replacing damping rods with different design parameters, which is convenient for standard and mass production.

Claims (4)

1, a kind of response damper fast of exerting oneself greatly, it is characterized in that this damper is based on master cylinder tube (5), middle part in master cylinder tube (5) is provided with piston (8), two ends are respectively equipped with guide sleeve (4), the inner of guide rod (2) is arranged in piston (8) and two guide sleeves (4), the outer end of guide rod (2) be connected earrings (1) and join; Between guide sleeve (4) and guide rod (2), bimetal sliding bearing (17) is set; The one end envelope of master cylinder tube (5) has gland nut (3), and the other end is filled with resisting medium (21) by attaching nut (11) auxiliary connection cylinder barrel (12) in the cavity at piston (8) two ends in the master cylinder tube (5); The outer end of secondary cylinder barrel (12) is by attaching nut (13) auxiliary connection cylinder earrings (14); In piston (8), be provided with the spiral-hole type damping device, this damping device is to be inserted in the symmetrical duct (25) of piston (8) by damper bar (9) to constitute, be processed with spiral chute (23) at damper bar (9) outer surface, piston (8) is assemblied in the neutral position of guide rod (2) by pressing plate (6) and semi-cyclic linkage (7).

2, the response damper fast of exerting oneself greatly according to claim 1, it is characterized in that: by rectangular seal (15) and axle polyurethane oil sealing (16) fitted seal, seal by three road rubber IIO type circles (22) between guide sleeve (4) and the cylinder barrel (5) between guide sleeve (4) and the guide rod (2).

3, the response damper fast of exerting oneself greatly according to claim 1 is characterized in that: adopt the hole to unite sealing with polyurethane oil sealing (20) and teflon rectangle wear ring (18) between piston (8) and the master cylinder tube (5).

4, the response damper fast of exerting oneself greatly according to claim 1 is characterized in that: adopt rubber IIO type circle (19) to seal between piston (8) and the guide rod (2).

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