Electromagnetic Suspension Support for Preventing Rubbing of Compressor Blisk Rotor

Abstract

The present invention discloses an electromagnetic suspension support for preventing rubbing between a compressor blisk rotor and other components, which includes a compressor casing, a first bearing mounting seat, a radial bearing seat, and a second bearing mounting seat. The radial bearing seat is fixed by the first bearing mounting seat and the second bearing mounting seat. A radial bearing is installed on the radial bearing seat, and a magnetic pole coil is installed on the radial bearing. A blisk rotor is installed inside the compressor casing. The first bearing mounting seat and the second bearing mounting seat are integrally provided with ear blocks. Bolts and nuts are installed inside the ear blocks, and a loosening prevention structure is provided on one side of the ear blocks. Through the electromagnetic suspension support design, the rotor does not contact the bearing, which can effectively prevent rubbing faults. It does not require excessive modification to the blisk rotor, thus avoiding complicated processing. A force is generated from the outside of the rotor to restore it to the normal working position, reducing the rubbing between the rotor and the casing, greatly improving the service life of the blisk rotor and the casing, and reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor devices, specifically to the electromagnetic suspension support for preventing collision and friction of a compressor blisk rotor. Background Art

[0002] A compressor is an important part of an aeroengine. The function of the compressor is to pressurize air, suck in air from the surrounding atmosphere, do work on the air by using high-speed rotating blades, and supply it to the combustion chamber after pressurization.

[0003] When the compressor blisk rotor rotates at a high speed, the blades will vibrate. Due to the too small gap between the blades and the casing, it may collide and rub against the inner surface of the casing, and both the blades and the casing will be worn, greatly reducing the service life. Therefore, it is particularly important to prevent the collision and friction between the blades and the casing. The invention patent 201510398969.3 designs a damping ring device for controlling the vibration of a compressor, and controls the vibration of the blades through the damping ring. The invention patent 201821531267.3 has an adjusting blind hole for adjusting the frequency at the bottom of the blade tenon, and a notch at the bottom of the rim. The damping ring is installed in the notch, and the vibration of the blades is reduced through the adjusting blind hole and the damping ring, but the positions of the adjusting blind hole and the damping ring are not easy to control in design. The invention patent 201821559200.0 reduces the blade vibration by adding a strip damping rib structure to the shrouded blade, but the rib structure is easy to be damaged and not easy to process. The invention patent 20100194830.X designs a shrouded blade with a weight-reducing groove in the middle of the crown teeth of the blade crown, and there are reinforcing ribs between the grooves, and reduces the vibration and collision friction of the blades by reducing the weight and centrifugal force of the blades, but the processing is too cumbersome. These methods control the blade vibration by changing the blade structure or adding devices, but due to the high-speed movement of the blades, there is still a possibility of collision and friction between the blades and the inner surface of the casing.

[0004] Therefore, the present invention proposes an electromagnetic suspension support for preventing collision and friction of a compressor blisk rotor to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an electromagnetic suspension support for preventing collision and friction of a compressor blisk rotor to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solutions: An electromagnetic suspension support for preventing rubbing between a compressor blisk rotor, including a compressor casing, a bearing mounting seat one, a radial bearing seat, and a bearing mounting seat two. The radial bearing seat is fixed by the bearing mounting seat one and the bearing mounting seat two. A radial bearing is installed on the radial bearing seat, and a magnetic pole coil is installed on the radial bearing. The radial bearing is connected to the bearing mounting seat one and the bearing mounting seat two by screws. Through holes one and two are opened on the casing. The radial bearing enters the inner surface of the casing through the through holes. A blisk rotor is installed inside the compressor casing. The bearing mounting seat one and the bearing mounting seat two are integrally provided with ear blocks. Bolts and nuts are installed in the ear blocks, and a loosening prevention structure is provided on one side of the ear blocks.

[0007] Preferably, the blisk rotor is composed of a first-stage rotor, a second-stage rotor, and a third-stage rotor. The blades of the first-stage rotor and the third-stage rotor are ordinary blades, and the blades of the second-stage rotor are shrouded blades.

[0008] Preferably, the blisk rotor is composed of a first-stage rotor, a second-stage rotor, a third-stage rotor, a fourth-stage rotor, and a fifth-stage rotor. The blades of the second-stage rotor and the fourth-stage rotor are shrouded blades.

[0009] Preferably, the loosening prevention structure is composed of a strip board, a nut collar, an installation groove, a pressing block, a plug rod, and a spring. The nut collar is symmetrically and rotatably installed on the strip board. An installation groove is opened on the strip board. The pressing block and the plug rod are inserted into the installation groove. The plug rod passes through the installation groove and is installed in the middle of the pressing block. A spring is sleeved on the plug rod.

[0010] Preferably, the shrouded blades of the second-stage rotor and the fourth-stage rotor are composed of a first labyrinth, silicon steel sheets, and a second labyrinth. The first labyrinth and the second labyrinth are symmetrically arranged on the silicon steel sheets. The silicon steel sheets are the parts that act with the bearing magnetic poles. The material of the magnetic pole coil is a copper-type energized material, and the material of the silicon steel sheets is a silicon steel material such as aluminum iron boron.

[0011] Preferably, two bosses are provided on the inner surfaces of the bearing mounting seat one and the bearing mounting seat two. Round holes are opened on the bosses. A first sensor and a second sensor are installed in the round holes. The first sensor and the second sensor are fixed by nuts.

[0012] Preferably, a rectangular parallelepiped groove is opened on the radial bearing seat. An electromagnetic suspension system controller is provided in the rectangular parallelepiped groove. The electromagnetic suspension system controller is clamped and fixed by the bearing mounting seat one and the bearing mounting seat two.

[0013] Preferably, the electromagnetic suspension system controller is composed of a first sensor, a second sensor, an adjustment and control unit, and a power amplifier.

[0014] Preferably, multiple groups of through holes one are provided. A radial bearing is provided in each group of through holes one. The number of radial bearings is an even multiple.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. Through the electromagnetic suspension support design, the rotor and the bearing do not contact each other, which can well prevent the rubbing fault. It does not make excessive modifications to the bladed disk rotor, thus avoiding complicated machining. A force is generated from the outside of the rotor to make it return to the normal working position, reducing the rubbing between the rotor and the casing, greatly improving the service life of the bladed disk rotor and the casing, and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional view of the compressor bladed disk rotor;

[0018] Figure 2 is a three-dimensional view of the casing;

[0019] Figure 3 is a sectional view of the compressor in the A-A direction;

[0020] Figure 4 is the shroud part of the 8-3 stage rotor;

[0021] Figure 5 is a sectional view of the compressor in the B-B direction;

[0022] Figure 6 is a sectional view of the radial bearing seat;

[0023] Figure 7 is the electromagnetic suspension support design of the fifth-stage rotor of the compressor;

[0024] Figure 8 is a simplified diagram of the electromagnetic suspension support control system of the rotor;

[0025] Figure 9 is a perspective detail view of the anti-loosening structure.

[0026] In the figure: compressor casing 1, bearing mounting seat 1 2, radial bearing seat 3, bearing mounting seat 2 4, bladed disk rotor 5, first-stage rotor 6, second-stage rotor 7, third-stage rotor 8, radial bearing magnetic pole coil 9, sensor 1 10, sensor 2 11, labyrinth 1 12, silicon steel sheet 13, labyrinth 2 14, through hole 1 15, through hole 2 16, electromagnetic suspension system controller 17, fourth-stage rotor 22, fifth-stage rotor 23, clamping strip plate 24, nut collar 25, mounting groove 26, extrusion block 27, inserting rod 28, spring 29. SPECIFIC EMBODIMENTS

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below. For the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figures 1 to 9 , the present invention provides a technical solution: an electromagnetic suspension support for preventing rubbing between a compressor blisk rotor, including a compressor casing 1, a bearing mounting seat one 2, a radial bearing seat 3 and a bearing mounting seat two 4. The radial bearing seat 3 is fixed by the bearing mounting seat one 2 and the bearing mounting seat two 4. A radial bearing is installed on the radial bearing seat 3, and a magnetic pole coil is installed on the radial bearing. The radial bearing is connected to the bearing mounting seat one 2 and the bearing mounting seat two 4 by screws. A through hole one 15 and a through hole two 16 are opened on the casing 1. The through hole two 16 is used to install a sensor one 10 and a sensor two 11. The radial bearing enters the inner surface of the casing 1 through the through hole 15. A blisk rotor 5 is installed inside the compressor casing 1. The bearing mounting seat one 2 and the bearing mounting seat two 4 are integrally provided with ear blocks. Bolts and nuts are installed in the ear blocks, and a loosening prevention structure is provided on one side of the ear blocks.

[0029] The blisk rotor 5 is composed of a first-stage rotor 6, a second-stage rotor 7 and a third-stage rotor 8. The blades of the first-stage rotor 6 and the third-stage rotor 8 are ordinary blades, and the blades of the second-stage rotor 7 are crowned blades.

[0030] The blisk rotor 5 is composed of a first-stage rotor 6, a second-stage rotor 7, a third-stage rotor 8, a fourth-stage rotor 22 and a fifth-stage rotor 23. The blades of the second-stage rotor 7 and the fourth-stage rotor 22 are crowned blades. Magnetic suspension support is applied to the second-stage rotor 7 and the fourth-stage rotor 22. Magnetic suspension support can be applied according to the actual number of stages of the compressor blisk rotor 5, better preventing rubbing between the blisk rotor 5 and the compressor casing 1.

[0031] The loosening prevention structure is composed of a strip board 24, a nut sleeve 25, an installation groove 26, an extrusion block 27, an insertion rod 28 and a spring 29. The nut sleeve 25 is symmetrically and rotatably installed on the strip board 24. The installation groove 26 is opened on the strip board 24. The extrusion block 27 and the insertion rod 28 are inserted into the installation groove 26. The insertion rod 28 passes through the installation groove 26 and is installed in the middle of the extrusion block 27. The spring 29 is sleeved on the insertion rod 28. After the nut is tightened, the nut sleeve 25 can be sleeved on the nut. At the same time, under the elastic force of the spring 29, the extrusion block 27 fixes the nut sleeve 25, avoiding the loosening of the nut sleeve 25 and the nut due to vibration.

[0032] The crowned blades of the secondary rotor 7 and the quadruple rotor 22 are composed of the first labyrinth seal 12, silicon steel sheets 13 and the second labyrinth seal 14. The first labyrinth seal 12 and the second labyrinth seal 14 are symmetrically arranged on the silicon steel sheets 13. The silicon steel sheets 13 are the parts that act with the bearing magnetic poles. The material of the magnetic pole coil is an electrically conductive material of the copper type, and the material of the silicon steel sheets 13 is a silicon steel material such as aluminum iron boron. After being energized, an electromagnetic force acts on the silicon steel sheets. The first sensor 10 and the second sensor 11 monitor the gap between the bearing and the silicon steel sheets 13. When the gap changes, the radial bearing will generate an electromagnetic force to make the bladed disk rotor 5 return to the normal working position, which can effectively prevent the rubbing fault between the bladed disk rotor 5 and the compressor casing 1.

[0033] There are two bosses on the inner surfaces of the first bearing mount 2 and the second bearing mount 4. There are round holes in the bosses, and the first sensor 10 and the second sensor 11 are installed in the round holes. The first sensor 10 and the second sensor 11 are fixed by nuts.

[0034] There is a rectangular groove on the radial bearing housing 3, and an electromagnetic suspension system controller 17 is arranged in the rectangular groove. The electromagnetic suspension system controller 17 is clamped and fixed by the first bearing mount 2 and the second bearing mount 4.

[0035] The electromagnetic suspension system controller 17 is composed of the first sensor 10, the second sensor 11, an adjustment control unit and a power amplifier. The position signals of the bladed disk rotor 5 at any time are picked up by the first sensor 10 and the second sensor 11. The signals picked up by the first sensor 10 and the second sensor 11 generate an error signal after being compared with the set signal. This error signal is the correction signal after proportional, differential and integral operations according to control theory or a given control strategy. The correction signal becomes a sufficient current or voltage output after being amplified by the power amplifier to drive the electromagnet to generate a corresponding restoring force, forcing the bladed disk rotor 5 to return to the equilibrium position, so as to realize the stable suspension of the bladed disk rotor 5 in a non-contact state.

[0036] There are multiple groups of the first through holes 15, and radial bearings are arranged in each group of the first through holes 15. The number of radial bearings is an even multiple of 2. The number of radial bearings and magnetic pole coils is not limited to 8, and can also be 4, 6, etc., which can be determined according to the actual weight and number of supported rotors.

[0037] Working principle: During the operation of the compressor, the position signals of the disk rotor 5 at any moment are picked up by sensor one 10 and sensor two 11. The signals picked up by sensor one 10 and sensor two 11 are compared with the set signal to generate an error signal. This error signal is the correction signal after proportional, differential, and integral operations according to control theory or a given control strategy. The correction signal is amplified by a power amplifier and then becomes a sufficient current or voltage output to drive the electromagnet to generate a corresponding restoring force, forcing the disk rotor 5 to return to the equilibrium position, so as to achieve the stable suspension of the disk rotor 5 in a non-contact state, which can effectively prevent the rubbing fault between the disk rotor 5 and the compressor casing 1.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic suspension support for preventing friction of a compressor blade rotor, comprising a compressor casing (1), a first bearing mounting seat (2), a radial bearing seat (3) and a second bearing mounting seat (4), characterized in that: The radial bearing seat (3) is fixed by a bearing mounting seat 1 (2) and a bearing mounting seat 2 (4), a radial bearing is mounted on the radial bearing seat (3), a magnetic pole coil is mounted on the radial bearing, the radial bearing is connected to the bearing mounting seat 1 (2) and the bearing mounting seat 2 (4) by screws, a through hole 1 (15) and a through hole 2 (16) are opened on the casing (1), and the radial bearing enters the inner surface of the casing (1) through the through hole 1 (15), a bladed disc rotor (5) is mounted inside the compressor casing (1), and an ear block is integrally provided on the bearing mounting seat 1 (2) and the bearing mounting seat 2 (4), a bolt and a nut are installed in the ear block, and an anti-loosening structure is provided on one side of the ear block; the bladed disc rotor (5) is composed of a first-stage rotor (6), a second-stage rotor (7), a third-stage rotor (8), a fourth-stage rotor (22) and a fifth-stage rotor (23), and the blades of the second-stage rotor (7) and the fourth-stage rotor (22) are crowned blades; the second-stage rotor The crown blades of the rotor (7) and the four-stage rotor (22) are composed of a grate tooth 1 (12), a silicon steel sheet (13) and a grate tooth 2 (14). The grate tooth 1 (12) and the grate tooth 2 (14) are symmetrically arranged on the silicon steel sheet (13). The silicon steel sheet (13) is the part that acts with the bearing magnetic pole. The material of the magnetic pole coil is a copper type conductive material. The material of the silicon steel sheet (13) is an aluminum iron boron silicon steel material. The anti-loosening structure is composed of a card plate (24), a nut collar (2 5), the mounting groove (26), the extrusion block (27), the insertion rod (28) and the spring (29), the card strip plate (24) is symmetrically rotated and mounted on the nut collar (25), the card strip plate (24) is provided with a mounting groove (26), the mounting groove (26) is plugged with the extrusion block (27) and the insertion rod (28), the insertion rod (28) passes through the mounting groove (26) and is installed in the middle of the extrusion block (27), and the insertion rod (28) is sleeved with a spring (29).

2. The electromagnetic suspension support for anti-friction of compressor blade rotor according to claim 1 is characterized in that: The inner surfaces of the bearing mounting seat 1 (2) and the bearing mounting seat 2 (4) are provided with two bosses, and the bosses are provided with circular holes. Sensor 1 (10) and sensor 2 (11) are installed in the circular holes. Sensor 1 (10) and sensor 2 (11) are fixed by nuts.

3. The electromagnetic suspension support for anti-friction of compressor blade rotor according to claim 1 is characterized in that: The radial bearing seat (3) is provided with a rectangular groove, in which an electromagnetic suspension system controller (17) is arranged. The electromagnetic suspension system controller (17) is clamped and fixed by the first bearing mounting seat (2) and the second bearing mounting seat (4).

4. The electromagnetic suspension support for anti-friction of compressor blade rotor according to claim 3 is characterized in that: The electromagnetic suspension system controller (17) is composed of sensor 1 (10), sensor 2 (11), a regulating control unit and a power amplifier.

5. The electromagnetic suspension support for anti-friction of compressor blade rotor according to claim 1 is characterized in that: The through hole one (15) is provided with multiple groups, and each group of through hole one (15) is provided with a radial bearing, and the number of the radial bearings is an even multiple of 2.

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