CN209892681U

CN209892681U - Horizontal vibration isolator

Info

Publication number: CN209892681U
Application number: CN201920382449.7U
Authority: CN
Inventors: 季炯炯; 季馨; 孙俊; 周洪梅
Original assignee: NANJING JIENUO ENVIRONMENT TECHNOLOGY Co Ltd
Current assignee: NANJING JIENUO ENVIRONMENT TECHNOLOGY Co Ltd
Priority date: 2019-03-25
Filing date: 2019-03-25
Publication date: 2020-01-03
Anticipated expiration: 2029-03-25

Abstract

The utility model provides a horizontal vibration isolator, including axle sleeve and casing, top-down has set up horizontal friction disc, last planar spring, the interior spacer ring, the lower planar spring that inlay water gently dashed the pad between axle sleeve and the casing, leaves the vibration displacement space between horizontal buffering blotter and the axle sleeve. The outer edge of the shaft sleeve below the shell is sequentially sleeved with a slip sheet and a horizontal damping adjusting sleeve, and a disc spring is arranged between the horizontal damping adjusting sleeve and the slip sheet.

Description

Horizontal vibration isolator

Technical Field

The utility model relates to a isolator field specifically is a horizontal isolator that is used for spacing vibration isolation buffering platform that shocks resistance of accurate corner.

Background

At present, electronic equipment for measuring and controlling attitude, such as an inertial navigator, a gyroscope, a radar, an optical platform and the like, is mainly installed on a carrier in a rigid mode and is also installed in a small amount of elasticity.

1 rigid mounting

Coordinate (X) for initial calibration of electronic equipment of the type by rigid mounting mode₀，Y₀，Z₀) And the stability and reliability of the posture parameter (Ѱ x, Ѱ y, Ѱ z) state are kept better. But the requirements on the environmental adaptability of the electronic equipment are higher, and particularly the requirements on the strong impact resistance and strong vibration resistance of the electronic equipment are higher. Sometimes, even if they are subjected to electrical property and structural reinforcement, the use requirements cannot be met, and a state that no qualified electronic product is available is caused. In this case, the elastic support platform has to be used to isolate the strong impact and vibration.

2 elastic mounting platform

The resilient mounting platform must have the following functions:

(1) carrying out effective vibration impact isolation on the navigation attitude measurement and control electronic equipment;

(2) the platform can only have X, Y, Z triaxial free linear displacement, and micro-rotation angle displacement exceeding the control precision requirement is not allowed.

The current commonly used micro-corner elastic supporting platforms are of two types: one is the corner displacement error has "a high accuracy impact isolator" that optoelectronic device compensated, patent application publication No. CN 105020329A. And the other is a six-connecting-rod impact isolator provided in the design of the ship-based laser inertial navigation system impact isolator with corner displacement errors compensated by photoelectric signal equipment.

The mechanical principle of the above two mechanisms is the same and each support rod takes a spring-damped form. Twelve hinge points of the two hinge points are respectively arranged on the upper mounting base surface and the lower mounting base surface.

Because the supporting rod is formed by spring-damping, the upper base and the lower base cannot be kept parallel in the strong impact process, and the corner displacement limiting function is not provided, so that the electronic equipment can lose the target due to the fact that six degrees of freedom all have relative displacement in the impact process, and the upper mounting base and the lower mounting base can be in a static state only under the action of the spring-damping force. At this time, the error of the relative rotation angle displacement (Ѱ x, Ѱ y, Ѱ z) of the upper mounting base surface and the lower mounting base surface is the 'resetting precision' of the mechanism, and the resetting precision given by the former in the patent document is 1 minute; the theoretical dynamic accuracy given in the latter paper is 33 arc seconds. The elastic mounting structure has the following characteristics:

(1) the damping force has a prominent influence on the resetting time and the resetting precision.

(a) The damping force is small, and the reset time is long (more than or equal to 0.5 second);

(b) if the damping force is large, the error that the upper and lower mounting platforms recover to the relevant balance state during resetting is large, the resetting time is short, but the resetting precision is poor.

(2) The eccentricity of the device has an influence on the elastic properties of the elastic support rod.

When the gravity center of the equipment is eccentric on the upper installation surface, the distribution and the adjustment of the rigidity of the springs and the damping force in the six supporting rods are difficult, and the decoupling design of the vibration isolation buffer system is not easy to realize.

(3) Liquid damping is preferred over dry friction damping.

Because the liquid damping force is in direct proportion to the speed variation, the transient speed variation delta V is large and the damping is large when strong impact is caused by adopting the liquid damping. After impact, the speed is low, the damping force is small, the reset time is short, and photoelectric compensation is adopted in the impact and reset processes, so that the directional precision of the scheme is high.

But it must be noted that: the photovoltaic devices mounted on the lower mounting base must be able to withstand a strong impact environment, otherwise the compensation will not be effective.

The reason is that the elastic damping characteristic cannot be optimally designed according to the vibration isolation buffering performance requirement and the resetting function requirement of the three axial directions.

In order to provide electronic equipment needing precise angle limiting, a platform consisting of an angle limiter assembly and a vibration isolation buffer is needed. The device can effectively isolate strong external vibration impact and can effectively limit the corner displacement in the vibration impact process and after impact, thereby ensuring the precision positioning precision of electronic equipment.

SUMMERY OF THE UTILITY MODEL

The utility model provides a horizontal vibration isolator to solve the problems of the prior art,

the utility model discloses a top-down has set up horizontal friction disc, last planar spring, the interior spacer ring that dashes the pad gently of embedded water, lower planar spring between axle sleeve and the casing, leaves the vibration displacement space between horizontal buffering blotter and the axle sleeve. The outer edge of the shaft sleeve below the shell is sequentially sleeved with a slip sheet and a horizontal damping adjusting sleeve, and a disc spring is arranged between the horizontal damping adjusting sleeve and the slip sheet.

The outer cylindrical surface of the shell is provided with a thread structure, and the shell is connected with the photoelectric equipment mounting plate through the thread structure.

The bearing shaft penetrates through the shaft sleeve, and the horizontal vibration isolator is in threaded connection with the vertical vibration isolator through the bearing shaft.

The utility model has the advantages that: the vibration isolation buffering device can effectively isolate and buffer horizontal strong impact and violent vibration environment borne by the photoelectric equipment, and ensures that the photoelectric equipment is always in a good vibration impact environment for reliable work, thereby improving the reliability and the long service life of the photoelectric equipment.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The utility model discloses the structure is as shown in fig. 1, including axle sleeve 9 and casing 3, top-down has set up horizontal friction disc 8, has gone up planar spring 7, has embedded water gently towards isolating ring 5, lower planar spring 4 of pad 6 between axle sleeve 9 and the casing 3, leaves the vibration displacement space between horizontal buffering blotter 6 and the axle sleeve 9. The outer edge of a shaft sleeve 9 below the shell 3 is sequentially sleeved with a slip sheet 2 and a horizontal damping adjusting sleeve 10, and a disc spring 1 is arranged between the horizontal damping adjusting sleeve 10 and the slip sheet 2. The outer cylindrical surface of the shell 3 is provided with threads to be connected with the photoelectric equipment mounting plate. The bearing shaft passes through the shaft sleeve 9 and is in threaded connection with the vertical vibration isolator.

The utility model discloses the concrete application way is many, and the above-mentioned only is the preferred embodiment of the utility model, should point out, to ordinary skilled person in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also make a plurality of improvements, and these improvements also should be regarded as the utility model discloses a scope of protection.

Claims

1. A horizontal vibration isolator, characterized in that: the vibration damping device comprises a shaft sleeve (9) and a shell (3), wherein a horizontal friction plate (8), an upper plane spring (7), a separation ring (5) embedded with a water gentle flushing pad (6) and a lower plane spring (4) are arranged between the shaft sleeve (9) and the shell (3) from top to bottom, and a vibration displacement space is reserved between the horizontal buffer pad (6) and the shaft sleeve (9); the outer edge of a shaft sleeve (9) below the shell (3) is sequentially sleeved with a sliding sheet (2) and a horizontal damping adjusting sleeve (10), and a disc spring (1) is arranged between the horizontal damping adjusting sleeve (10) and the sliding sheet (2).

2. The horizontal vibration isolator according to claim 1, wherein: the outer cylindrical surface of the shell (3) is provided with a thread structure, and the shell (3) is connected with the photoelectric equipment mounting plate through the thread structure.

3. The horizontal vibration isolator according to claim 1 or 2, wherein: the bearing shaft penetrates through the shaft sleeve (9), and the horizontal vibration isolator is in threaded connection with the vertical vibration isolator through the bearing shaft.