Two-axial-rigidity vibration isolator

Abstract

The utility model discloses a biaxial rigidity vibration isolator which comprises a T-shaped support, a shell and two sets of movable lugs, a vibration isolation assembly is arranged in the shell, the vibration isolation assembly in the shell is connected with the end of the T-shaped support, the number of the movable lugs is two, the two sets of movable lugs are arranged outside the shell respectively, and the two sets of movable lugs are connected with the T-shaped support. The T-shaped support is connected with an engine installation joint, and the movable lug piece is connected with an engine frame. The vibration isolator for the engine is simple in structure and compact in assembly, the rigidity is adjusted by changing the mass of the metal wire mesh blocks, the vibration isolator can be designed into two axial rigidity vibration isolators according to needs, and the vibration isolator has good application prospects in the field of vibration isolation installation of turboprop engines.

Description

Technical Field

[0001] The utility model relates to the application field of vibration isolation design technology of space support structures of equipment such as engines, and in particular to a two-axial stiffness vibration isolator. Background Art

[0002] The violent vibration caused by the rotation of the shaft, flywheel, and propeller when the engine is running is the main source of engine vibration. The excessive vibration of the engine transmitted to the carrier will inevitably reduce the reliability of the carrier structure. In order to improve the reliability of the carrier structure, it is necessary to design a spatial vibration isolation installation for the engine, that is, to install a vibration isolator on the engine. At present, the rubber vibration isolators used for engine installation cannot meet the requirements of certain high-temperature environments. High-temperature environments accelerate the aging of rubber materials and reduce the stiffness of rubber, which has an adverse effect on the vibration isolators and is no longer sufficient to meet the needs of the development of engine installation systems. Summary of the invention

[0003] The utility model aims to provide a dual-axial rigidity vibration isolator, which mainly solves the problem that the existing engine vibration isolator cannot adapt to high temperature environment.

[0004] In order to achieve the above-mentioned purpose, the utility model is implemented according to the following technical scheme:

[0005] The utility model comprises a T-shaped support, an outer shell, and a movable ear piece. A vibration isolation component is arranged in the outer shell, and the vibration isolation component in the outer shell is connected to the end of the T-shaped support. The movable ear piece is divided into two groups, and the two groups of movable ear pieces are respectively arranged on the outside of the outer shell. The T-shaped support is connected to the engine mounting section, and the movable ear piece is connected to the engine frame.

[0006] Furthermore, the T-shaped support is composed of a flange plate, a flange hole, a boss, a radial bearing and a support plate. One side of the support plate is perpendicular to the middle of one end surface of the flange plate and is integrally formed and fixedly connected. There are multiple flange holes, which are respectively arranged at the four corners of the flange plate. The boss is fixedly arranged in the middle of the other end surface of the flange plate. The other end of the support plate is connected to the vibration isolation assembly through a radial bearing, and the flange plate is connected to the engine mounting node through the flange hole.

[0007] Specifically, the vibration isolation assembly includes a cover plate, an outer baffle, a pre-tightening bolt, a cover plate screw, a first wire mesh block, a second wire mesh block, a first inner baffle, a second inner baffle, a first limiting sleeve, and a second limiting sleeve. The outer shell includes a U-shaped groove, an annular groove, a middle through hole, an ear-shaped boss, and a boss screw hole. An annular groove is provided on both sides of the outer shell. A cover plate is provided on both sides of the outer shell. The cover plate is fixedly connected to the outer shell through the ear-shaped boss, the boss screw hole, and the cover plate screw. The middle through hole is set in the middle of the outer shell. The pre-tightening bolt passes through the two outer baffles. The U-shaped groove is set in the middle of the outer shell. The T-shaped support is set in the middle of the outer shell. The radial bearing is rotatably connected to the middle part of the preload bolt, and the T-shaped support is located in the U-shaped groove. The preload bolt is located on both sides of the T-shaped support and the first limiting sleeve and the second limiting sleeve are respectively mounted on the first limiting sleeve and the second limiting sleeve. The periphery of the first limiting sleeve and the second limiting sleeve are respectively mounted on the first wire mesh block and the second wire mesh block, and the first wire mesh block and the second wire mesh block are respectively located in the two annular grooves of the outer shell, and the first inner baffle plate and the second inner baffle plate are respectively mounted on the first limiting sleeve and the second limiting sleeve, and are located on the inner sides of the first wire mesh block and the second wire mesh block.

[0008] Specifically, the movable ear piece includes two ears and a radial bearing three. The outer shell is provided with an ear piece one and an ear piece two. The ear piece one is provided with a radial bearing two, and the ear piece two is provided with an ear piece hole. There are two movable ears, and the two ears are provided at one end of the movable ear piece, and the radial bearing three is provided at the other end of the movable ear piece. The radial bearing three is connected to the engine frame, and the two ears are connected to the radial bearing two through ear piece screws, and the two ears of the other movable ear piece are connected to the ear piece hole through another ear piece screw.

[0009] The beneficial effects of the utility model are:

[0010] The utility model is a two-axial stiffness vibration isolator. Compared with the prior art, the utility model has the following beneficial effects:

[0011] (1) The engine vibration isolator proposed by the utility model has a simple structure, is tightly assembled, and is made of all-metal material, which can adapt to harsh temperature and corrosive environments, and is particularly suitable for vibration isolation installation in a high temperature environment of more than 200°C at the installation node of a turboprop engine;

[0012] (2) The stiffness of the vibration isolator proposed by the utility model is easy to design. The stiffness can be adjusted by changing the mass of the metal wire mesh block, and it can be designed as a two-axial stiffness vibration isolator as needed. It has a good application prospect in the field of vibration isolation installation of turboprop engines. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of an implementation method of the utility model;

[0014] Figure 2 for Figure 1 A schematic diagram of the mid-plane cross-sectional structure;

[0015] Figure 3 This is a schematic structural diagram of an implementation scheme of the T-shaped support in the utility model;

[0016] Figure 4 This is a schematic structural diagram of an implementation scheme of the housing in the utility model.

[0017] In the figure: 1-T-type support, 2-housing, 3-cover plate, 4-outer baffle plate, 5-preload bolt, 6-cover plate screw, 7-movable ear piece, 8-ear piece screw, 9a-first metal mesh block, 9b-second metal mesh block, 10a-first inner baffle plate, 10b-second inner baffle plate, 11a-first limit sleeve, 11b-second limit sleeve; 101-flange plate, 102-flange hole, 103-boss, 104-radial bearing one, 105-support plate; 201-U-shaped groove, 202-annular groove, 203-middle through hole, 204-ear-type boss, 205-boss screw hole, 206-ear piece one, 207-radial bearing two, 208-ear piece two, 209-ear piece hole; 701-double ears, 702-radial bearing three. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The schematic embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0019] like Figure 1 As shown: the utility model includes a T-shaped support 1, a shell 2, and a movable ear piece 7. A vibration isolation component is arranged in the shell 2, and the vibration isolation component in the shell 2 is connected to the end of the T-shaped support 1. The movable ear piece 7 is divided into two groups, and the two groups of movable ear pieces 7 are respectively arranged on the outside of the shell 2. The T-shaped support 1 is connected to the engine mounting node, and the movable ear piece 7 is connected to the engine frame.

[0020] Furthermore, the T-shaped support 1 is composed of a flange plate 101, a flange hole 102, a boss 103, a radial bearing 104, and a support plate 105. One side of the support plate 105 is perpendicular to the middle of one end surface of the flange plate 101 and is integrally formed and fixedly connected. There are multiple flange holes 102, which are respectively arranged at the four corners of the flange plate 101. The boss 103 is fixedly arranged in the middle of the other end surface of the flange plate 101. The other end of the support plate 105 is connected to the vibration isolation assembly through a radial bearing 104, and the flange plate 101 is connected to the engine mounting node through the flange hole 102.

[0021] Specifically, the vibration isolation assembly includes a cover plate 3, an outer baffle plate 4, a pre-tightening bolt 5, a cover plate screw 6, a first metal wire mesh block 9a, a second metal wire mesh block 9b, a first inner baffle plate 10a, a second inner baffle plate 10b, a first limiting sleeve 11a, and a second limiting sleeve 11b. The outer shell 2 includes a U-shaped groove 201, an annular groove 202, a middle through hole 203, an ear-shaped boss 204, and a boss screw hole 205. An annular groove 202 is provided on both sides of the outer shell 2. A cover plate 3 is provided on both sides of the outer shell 2. The cover plate 3 is fixedly connected to the outer shell 2 through the ear-shaped boss 204, the boss screw hole 205, and the cover plate screw 6. The middle through hole 203 is set in the middle part of the outer shell 2. The pre-tightening bolt 5 passes through the two outer baffle plates 4. The U-shaped groove 201 is set in the middle part of the outer shell 2. The T-shaped support 1 is rotatably connected to the middle part of the preload bolt 5 through the radial bearing 104, and the T-shaped support 1 is located in the U-shaped groove 201, and the preload bolt 5 is located on both sides of the T-shaped support 1 and the first limiting sleeve 11a and the second limiting sleeve 11b are respectively mounted, and the periphery of the first limiting sleeve 11a and the second limiting sleeve 11b are respectively mounted with the first wire mesh block 9a and the second wire mesh block 9b, and the first wire mesh block 9a and the second wire mesh block 9b are respectively located in the two annular grooves 202 of the outer shell 2, and the first inner baffle plate 10a and the second inner baffle plate 10b are respectively mounted on the first limiting sleeve 11a and the second limiting sleeve 11b, and are located on the inner sides of the first wire mesh block 9a and the second wire mesh block 9b.

[0022] Specifically, the movable ear piece 7 includes two ears 701 and a radial bearing three 702. The outer shell 2 is provided with an ear piece 206 and an ear piece 208. The ear piece 1 206 is provided with a radial bearing two 207. The ear piece 208 is provided with an ear piece hole 209. There are two movable ears 7. The two ears 701 are provided at one end of the movable ear piece 7, and the radial bearing three 702 is provided at the other end of the movable ear piece 7. The radial bearing three 702 is connected to the engine frame. The two ears 701 are connected to the radial bearing two 207 through an ear piece screw 8, and the two ears 701 of the other movable ear piece 7 are connected to the ear piece hole 209 through another ear piece screw 8.

[0023] The housing 2 of the vibration isolator of the utility model is filled with a metal mesh block 9. The metal mesh block 9 is a porous material formed by pressing metal wires, which provides the vibration isolator with lower rigidity and higher damping, thereby achieving a good vibration reduction effect.

[0024] Three radial bearings (radial bearing one 104, radial bearing two 207, radial bearing three 702) in a plane are combined into a triangle to achieve two axial stiffnesses, and the axial stiffness of the vibration isolator along the pre-tightening bolt 5 is almost zero.

[0025] All parts of the vibration isolator of the utility model, including the metal wire mesh block 9, are made of high-temperature resistant metal materials.

[0026] The metal mesh block 9 of the utility model is set to be cylindrical with a middle through hole. The stiffness of the vibration isolator can be adjusted by adjusting the mass of the metal mesh block 9. The higher the mass, the greater the stiffness; the lower the mass, the smaller the stiffness.

[0027] The above shows and describes the basic principle and main features of the utility model and the advantages of the invention. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the invention, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A two-axis stiffness vibration isolator, Features: The invention comprises a T-shaped support (1), an outer shell (2), and a movable ear piece (7); a vibration isolation component is arranged in the outer shell (2); the vibration isolation component in the outer shell (2) is connected to the end of the T-shaped support (1); the movable ear piece (7) is in two groups; the two groups of movable ear pieces (7) are respectively arranged outside the outer shell (2); the T-shaped support (1) is connected to the engine mounting section; and the movable ear piece (7) is connected to the engine frame.

2. The two-axial stiffness vibration isolator according to claim 1, Features: The T-shaped support (1) is composed of a flange plate (101), a flange hole (102), a boss (103), a radial bearing (104), and a support plate (105); one side of the support plate (105) is perpendicular to the middle of one end face of the flange plate (101) and is integrally formed and fixedly connected; there are a plurality of flange holes (102) and they are respectively arranged at four corners of the flange plate (101); the boss (103) is fixedly arranged at the middle of the other end face of the flange plate (101); the other end of the support plate (105) is connected to the vibration isolation assembly through a radial bearing (104); and the flange plate (101) is connected to the engine mounting node through the flange hole (102).

3. The two-axial stiffness vibration isolator according to claim 2, Features: The vibration isolation assembly comprises a cover plate (3), an outer baffle plate (4), a pre-tightening bolt (5), a cover plate screw (6), a first metal wire mesh block (9a), a second metal wire mesh block (9b), a first inner baffle plate (10a), a second inner baffle plate (10b), a first limiting shaft sleeve (11a), and a second limiting shaft sleeve (11b); the housing (2) comprises a U-shaped groove (201), an annular groove (202), a middle through hole (203), an ear-shaped boss (204), and a boss screw hole (205); Both sides of the shell (2) are provided with an annular groove (202), and both sides of the shell (2) are provided with a cover plate (3), and the cover plate (3) is fixedly connected to the shell (2) through an ear-shaped boss (204), a boss screw hole (205), and a cover plate screw (6). The middle through hole (203) is set through the middle part of the shell (2), and the pre-tightening bolt (5) passes through the two outer baffles (4). The U-shaped groove (201) is set on the shell (2). The T-shaped support (1) is rotatably connected to the middle of the pre-tightening bolt (5) through the radial bearing (104), and the T-shaped support (1) is located in the U-shaped groove (201). The first limiting shaft sleeve (11a) and the second limiting shaft sleeve (11b) are respectively mounted on both sides of the T-shaped support (1) on the pre-tightening bolt (5), and the first metal limiting shaft sleeve (11a) and the second metal limiting shaft sleeve (11b) are respectively mounted on the periphery of the first limiting shaft sleeve (11a) and the second limiting shaft sleeve (11b). The first metal mesh block (9a) and the second metal mesh block (9b) are respectively located in two annular grooves (202) of the outer shell (2); the first inner baffle plate (10a) and the second inner baffle plate (10b) are respectively mounted on the first limiting shaft sleeve (11a) and the second limiting shaft sleeve (11b), and are located on the inner sides of the first metal mesh block (9a) and the second metal mesh block (9b).

4. The two-axial stiffness vibration isolator according to claim 2, Features: The movable ear piece (7) comprises two ears (701) and a radial bearing three (702); the housing (2) is provided with an ear piece one (206) and an ear piece two (208); the ear piece one (206) is provided with a radial bearing two (207); the ear piece two (208) is provided with an ear piece hole (209); there are two movable ear pieces (7); one end of the movable ear piece (7) is provided with the two ears (701); the other end of the movable ear piece (7) is provided with the radial bearing three (702); the radial bearing three (702) is connected to the engine frame; the two ears (701) are connected to the radial bearing two (207) through an ear piece screw (8); the two ears (701) of the other movable ear piece (7) are connected to the ear piece hole (209) through another ear piece screw (8).

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