CN110549267B

CN110549267B - Elastic supporting device

Info

Publication number: CN110549267B
Application number: CN201910840978.1A
Authority: CN
Inventors: 齐江龙; 杨美宁; 张卫红; 陈雅曦; 王明杰; 呙道军; 王磊; 陈津虎; 韩铭; 杨泽雨
Original assignee: China Academy of Launch Vehicle Technology CALT; Beijing Institute of Structure and Environment Engineering
Current assignee: China Academy of Launch Vehicle Technology CALT; Beijing Institute of Structure and Environment Engineering
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2021-03-23
Anticipated expiration: 2039-09-06
Also published as: CN110549267A

Abstract

The invention relates to the technical field of noise tests, in particular to an elastic supporting device which comprises an air compressor, wherein a left air pipe is fixedly connected at an air outlet of the air compressor, a pressure reducing valve is fixedly connected at the right end of the left air pipe, a fixing frame is fixedly connected at the bottom of the pressure reducing valve and positioned at the right side of the air compressor, a right air pipe is fixedly connected at the right side of the pressure reducing valve, a rigid supporting base is arranged at the right side of the fixing frame, a lower connection frame is fixedly connected at the top of the rigid supporting base, and the problems that a tested product needs to be elastically supported in a noise test at present so as to simulate the free-free boundary condition of the tested product in a flying state, namely the supporting frequency of the tested product is less than 1/4 of the initial frequency of the test, the traditional rubber pad supporting mode is difficult to reduce the supporting frequency below 10Hz, thereby causing the problem of inaccurate experimental data.

Description

Elastic supporting device

Technical Field

The utility model relates to a noise test technical field specifically is an elastic support device.

Background

Aircraft are subjected to harsh engine jet and aerodynamic noise during launch and flight, causing vibration of the aircraft structure and instrumentation, and potentially damaging effects. In the noise test, the noise environment in the flight state is simulated by applying noise load to the aircraft, so that the vibration response of the structure, the instrument and the connection part of the instrument and the equipment can be obtained, and the adaptability of the noise environment is examined. The noise test can be generally divided into a reverberation room noise test for generating a diffusion sound field and a traveling wave tube noise test for generating a grazing incidence sound field according to different sound excitation types, wherein the former is suitable for equipment or structures working or living in the noise fields generated by a carrier, power equipment, other high-intensity sound sources and the like; the latter is suitable for equipment that works or lives in an environment where the surface is subjected to pressure pulsations.

At present, in a noise test, a tested product needs to be elastically supported to simulate a free-free boundary condition in a flying state, namely, the supporting frequency of the tested product is less than 1/4 of a test starting frequency, and a traditional rubber pad supporting mode is difficult to reduce the supporting frequency to be below 10Hz, so that the experimental data is inaccurate, and therefore an elastic supporting device is needed to improve the problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an elastic supporting device to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an elastic support device, includes air compressor, air compressor's the left trachea of fixedly connected with of gas outlet department, the tracheal right-hand member fixedly connected with relief pressure valve in a left side, the bottom of relief pressure valve just is located air compressor's right side fixedly connected with mount, the right side fixedly connected with right trachea of relief pressure valve, the right side of mount is provided with the rigid support base, the bottom fixedly connected with down the adapter frame of rigid support base, the top of down the adapter frame just is close to rigid support base central point and puts fixedly connected with air spring, the top of down the adapter frame just keeps away from air spring position fixedly connected with fixed plate, the spout has been seted up in the fixed plate, the spout in-connection has the slide, the bottom of slide just is located the adapter frame under the adapter frame fixedly connected with, down the adapter frame with go up the adapter frame and air spring all be provided with four and four down the All evenly arrange along cylinder circumference, contained angle between two liang is 90, equal fixedly connected with rubber pad in the spout, the square groove has all been seted up to the top and the below that the front and the back of slide just are located slide center department, square inslot fixedly connected with square plate, the square plate is close to slide one side and is located square inslot fixedly connected with pivot, on the square groove and pivot position department correspondence have seted up logical groove, it has the bearing to just be located logical inslot coupling in the pivot, the front and the back and the square plate position department fixedly connected with clamp of fixed plate.

Preferably, the left air pipe, the pressure reducing valves and the right air pipe are respectively provided with four air springs, and each pressure reducing valve corresponds to one air spring.

Preferably, the right air pipe is fixedly connected with the air spring.

Preferably, the materials of the upper transfer frame, the lower transfer frame, the fixing plate and the sliding plate are all stainless steel, and the rubber pad is made of chloroprene rubber.

Preferably, the square plate, the rotating shaft and the bearing are all provided with a plurality of connecting modes, and the connecting modes of the rotating shaft and the bearing are in rotating connection.

Preferably, the sliding plate is connected with the rubber pad in a sliding manner, and the bearing is connected with the rubber pad in a sliding manner.

Preferably, the shape of the rubber pad is matched with the shape of the sliding chute.

Preferably, the rigid support base is made of high-strength alloy steel and is fixed on the ground through bolts.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses in, through setting up the rigid support frame, air compressor, air spring, left trachea, right trachea, air spring is to fill compressed air in flexible inclosed rubber gasbag, thereby utilize compressed air's elasticity to carry out the effect of transmission of force, air spring can provide about 2Hz supporting frequency, thereby guarantee to satisfy experimental supporting frequency requirement, solved at present in noise test, need carry out elastic support to the product under test, with simulate its freedom-free boundary condition under the flight condition, the supporting frequency of experimental product is less than 1/4 of experimental initial frequency promptly, traditional rubber pad support mode, hardly fall the supporting frequency below 10Hz, thereby lead to the unsafe problem of experimental data.

2. The utility model discloses in, through setting up the relief pressure valve, every relief pressure valve corresponds an air spring, to the test product that the focus is not at the geometric center, can be through a plurality of air spring system independent regulation pressure, make the test product be in the horizontality.

3. The utility model discloses in, through setting up the last transfer frame, only need be connected to the test product and go up the transfer frame on, need not to be connected to specific position, have good compatibility.

4. The utility model discloses in, through setting up the rigidity support base, be located experimental product bottom completely to the support of experimental product, can not produce the reverberation sound field when carrying out the reverberation room experiment and disturb, when carrying out the travelling wave tube experiment, can not take place to interfere with the installation of travelling wave tube.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a front sectional view of the sliding chute of the present invention;

FIG. 3 is a side sectional view of the slide plate of the present invention;

fig. 4 is an enlarged view of a portion a in fig. 2 according to the present invention.

In the figure: 1-an air compressor, 2-a left air pipe, 3-a pressure reducing valve, 4-a fixed frame, 5-a right air pipe, 6-a rigid supporting base, 7-a lower connection frame, 8-an air spring, 9-a fixed plate, 10-a sliding chute, 11-a sliding plate, 12-an upper connection frame, 13-a rubber pad, 14-a square groove, 15-a square plate, 16-a rotating shaft, 17-a through groove, 18-a bearing and 19-a hoop.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution:

an elastic supporting device comprises an air compressor 1, a left air pipe 2 is fixedly connected at an air outlet of the air compressor 1, a pressure reducing valve 3 is fixedly connected at the right end of the left air pipe 2, the pressure reducing valve 3 and a right air pipe 5 are respectively provided with four air springs 8, each pressure reducing valve 3 corresponds to one air spring 8, a fixing frame 4 is fixedly connected at the bottom of each pressure reducing valve 3 and positioned at the right side of the air compressor 1, a right air pipe 5 is fixedly connected at the right side of each pressure reducing valve 3, the right air pipe 5 is fixedly connected with the air springs 8, a rigid supporting base 6 is arranged at the right side of each fixing frame 4, the rigid supporting base 6 is made of high-strength alloy steel and is fixed on the ground through bolts, a lower connecting frame 7 is fixedly connected at the top of the rigid supporting base 6, the air springs 8 are fixedly, the lower connecting frame 7, the upper connecting frame 12 and the air spring 8 are respectively provided with four lower connecting frames 7, four upper connecting frames 12 and four air springs 8 which are uniformly arranged along the circumferential direction of the cylinder, the included angle between every two lower connecting frames is 90 degrees, the top of the lower connecting frame 7 and the position far away from the air spring 8 are fixedly connected with a fixed plate 9, a sliding chute 10 is arranged in the fixed plate 9, a sliding plate 11 is connected in the sliding chute 10, the upper connecting frame 12, the lower connecting frame 7, the fixed plate 9 and the sliding plate 11 are made of stainless steel, the rubber pad 13 is made of chloroprene rubber, the upper connecting frame 12 is fixedly connected at the bottom of the sliding plate 11 and is positioned right above the lower connecting frame 7, rubber pads 13 are fixedly connected in the sliding chute 10, the rubber pads 13 are matched with the sliding chute 10 in shape, the sliding plate 11 is connected with the rubber pads 13 in a sliding mode, the bearings 18 are connected with the rubber pads 13 in a sliding mode, square grooves 14, fixedly connected with square plate 15 in the square groove 14, square plate 15 is close to slide 11 one side and is located square groove 14 internal fixedly connected with pivot 16, on the square groove 14 and pivot 16 position department correspond and have seted up logical groove 17, on the pivot 16 and be located logical groove 17 in-connection have a bearing 18, square plate 15 and pivot 16 and bearing 18 all are provided with a plurality ofly and pivot 16 and bearing 18's connected mode is connected for rotating, the front and the back of fixed plate 9 and square plate 15 position department fixedly connected with clamp 19.

The utility model discloses work flow: when the air compression device is used, an experimental product is fixed on the upper transfer frame 12 through a bolt, the air compressor 1 is started, compressed air is input into the pressure reducing valve 3 through the left air pipe 2 by the air compressor 1, the air pressure in the air springs 8 is different by controlling the opening degree of the pressure reducing valve 3, the extension degrees of the air springs are different, so that the experimental product is in a horizontal state, the air compressor 1 continuously provides high-pressure air for the air springs 8, the pressure test products in each air spring 8 are gradually increased to float through the pressure reducing valve 3, the pressure test products are in a free state in a noise test, and the sliding plate 11 is used for limiting large displacement in the horizontal direction; the rubber pad 13 is used for elastic support in the horizontal direction; the bearing 18 enables the sliding plate 11 to freely move in the vertical direction, and because the air spring 8 is formed by filling compressed air into a flexible and sealed rubber air bag and transmits force by using the elasticity of the compressed air so as to realize the vibration isolation effect, the air spring can provide the supporting frequency of about 2Hz, so that the supporting frequency of a test product is reduced to below 10 Hz.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An elastic support device comprising an air compressor (1), characterized in that: the air outlet of the air compressor (1) is fixedly connected with a left air pipe (2), the right end of the left air pipe (2) is fixedly connected with a pressure reducing valve (3), the bottom of the pressure reducing valve (3) is located on a right side fixedly connected with fixing frame (4) of the air compressor (1), the right side fixedly connected with a right air pipe (5) of the pressure reducing valve (3), a rigid support base (6) is arranged on the right side of the fixing frame (4), a lower connecting frame (7) is fixedly connected with the top of the rigid support base (6), the top of the lower connecting frame (7) is close to a central position of the rigid support base (6) and is fixedly connected with an air spring (8), the top of the lower connecting frame (7) is far away from a fixed plate (9) fixedly connected with the position of the air spring (8), and a sliding groove (, the air spring, the rotating shaft (16) is connected with a bearing (18) in the through groove (17), and the front surface and the back surface of the fixing plate (9) are fixedly connected with a hoop (19) at the position of the square plate (15).

2. An elastic support device as defined in claim 1, wherein: the left air pipe (2), the pressure reducing valves (3) and the right air pipe (5) are provided with four air springs (8) corresponding to the pressure reducing valves (3).

3. An elastic support device as defined in claim 1, wherein: the right air pipe (5) is fixedly connected with the air spring (8).

4. An elastic support device as defined in claim 1, wherein: the materials of the upper transfer frame (12), the lower transfer frame (7), the fixing plate (9) and the sliding plate (11) are all stainless steel, and the material of the rubber pad (13) is chloroprene rubber.

5. An elastic support device as defined in claim 1, wherein: the square plate (15), the rotating shaft (16) and the bearing (18) are all provided with a plurality of connecting modes, and the rotating shaft (16) is in rotating connection with the bearing (18).

6. An elastic support device as defined in claim 1, wherein: the sliding plate (11) is connected with the rubber pad (13) in a sliding manner, and the bearing (18) is connected with the rubber pad (13) in a sliding manner.

7. An elastic support device as defined in claim 1, wherein: the shape of the rubber pad (13) is matched with that of the sliding chute (10).

8. An elastic support device as defined in claim 1, wherein: the rigid support base (6) is made of high-strength alloy steel, and the rigid support base (6) is fixed on the ground through bolts.