CN110243604B - An intermediate bearing vibration test device - Google Patents

Abstract

The invention provides an intermediary bearing vibration test device which comprises a test bed base, a high-pressure rotor system, a low-pressure rotor system, a test system, a load simulation device and a temperature environment simulation device, wherein the test bed base is provided with a base seat; the high-pressure rotor system and the low-pressure rotor system are used for enabling the inner and outer rings of the intermediate bearing to rotate at different speeds; the test system is used for testing, transmitting and collecting vibration signals of the intermediate bearing; the load simulation device is used for simulating centrifugal load and radial load which are born by the intermediate bearing; the temperature environment simulation device is used for simulating the high-temperature environment of the intermediate bearing. The intermediary bearing vibration test device provided by the invention realizes simulation of the temperature environment and the load characteristics of the intermediary bearing, avoids interference of other components on the vibration signal of the intermediary bearing, and can be used for directly testing the surface vibration of the inner ring and the outer ring of the bearing body and effectively analyzing the vibration characteristics of the intermediary bearing body.

Description

An intermediate bearing vibration test device

technical field

The invention belongs to the field of rolling bearing testing, in particular to an intermediate bearing vibration testing device.

Background technique

The intermediate bearing is used to connect and support the low-pressure rotor and the high-pressure rotor of the aero-engine. In the environment of high temperature, high speed and complex load, faults such as excessive vibration or overheating often occur, and it has become the weak link of the aero-engine. When the intermediate bearing is working, the inner and outer rings rotate at the same time, and its vibration characteristics are very different from the rotation of the single inner ring or the single outer ring of the traditional bearing. In addition, the intermediate bearing is in a high temperature environment, and the working temperature is as high as 150 ℃ or more, and temperature changes will also cause The vibration characteristics of the bearing change. At the same time, the gravity of the rotor system and the radial force generated by the rotor blades affect the rolling bearing area inside the intermediate bearing and the load of each roller will also affect the vibration characteristics of the bearing. It is necessary to consider the rotation of the inner and outer rings, temperature and load. Therefore, an intermediate bearing vibration performance test device with temperature environment and load simulation is urgently needed.

At present, although some manufacturers or experts have proposed some intermediate bearing vibration test benches. For example, patents: a vibration test device of an inner and outer rotor system (CN 201724799 U), a dual-rotor fault simulation experiment device (CN103759934 B), aero-engine intermediate bearing fault detection method and detection device (CN 105651515 B) The above patents are all in the test A vibration sensor is installed on the bearing seat on the platform to measure the vibration signal of the intermediate bearing. The test signal has a large error. At the same time, the vibration of other devices on the test bench such as couplings, supporting rolling bearings, etc. will interfere with the vibration of the intermediate bearing and affect the accuracy of vibration signal acquisition. sex. For example, the patent designs an aero-engine simulation test bench based on a dual-rotor simplified dynamic model (CN20151081686), and the aero-engine intermediate bearing double-rotor test bench loading method (CN 105841960 B) supports using rolling bearings, and the motor and the rotor are connected by a coupling. Measures for vibration isolation are not considered. Moreover, none of the above intermediate bearing test benches can realize the simulation of intermediate bearing in high temperature environment.

In addition, the current intermediate bearing testers generally have the following problems: (1) It is difficult to simulate complex loads and high-temperature working environments. (2) Vibration isolation measures are not adopted. For example, the supporting bearing adopts rolling bearing or the motor and the rotor are connected by a coupling. The vibration inside the motor is transmitted to the rotor system, and there are a lot of interference signals in the vibration acquisition data. (3) Effectively applying radial load to the bearing under the condition of introducing interference signals cannot be avoided. Since the inner and outer rings of the intermediary rotate at the same time, additional transition rolling bearings need to be added to apply radial loads, but it will also increase the rolling bearings to generate interference signals. (4) The vibration test of the intermediate bearing is mostly characterized by testing the bearing seat, and the intermediate bearing body is not directly tested. In the actual process, the vibration of the intermediate bearing is transmitted to the bearing seat, and there is a complex transmission path, which causes the vibration signal to change, and the intermediate bearing cannot be effectively analyzed. vibration characteristics.

SUMMARY OF THE INVENTION

The invention aims to solve the above-mentioned deficiencies in the prior art, and proposes an intermediate bearing vibration test device, which realizes the simulation of the temperature environment and load characteristics of the intermediate bearing, and at the same time avoids other components from interfering with the vibration signal of the intermediate bearing. The proposed intermediate bearing testing method directly Testing the surface vibration of the inner and outer rings of the bearing body can effectively analyze the vibration characteristics of the intermediate bearing body.

The technical scheme of the present invention is:

An intermediate bearing vibration test device, the intermediate bearing vibration test device comprises a test bed base 1, a high-pressure rotor system 2, a low-pressure rotor system 4, a test system 5, a load simulation device 6 and a temperature environment simulation device 7, the said The high pressure rotor system 2, the low pressure rotor system 4, the test system 5, the load simulation device 6 and the temperature environment simulation device 7 are arranged on the test bench base 1; the high pressure rotor system 2 and the low pressure rotor system 4 are used to make the intermediate The inner and outer rings of the bearing 3 rotate at different speeds; the test system 5 is used to test transmission and collect the vibration signal of the intermediate bearing 3; the load simulation device 6 is used to simulate the centrifugal load and radial load of the intermediate bearing 3 ; The temperature environment simulation device 7 is used to simulate the high temperature environment of the intermediate bearing 3; wherein:

The high-voltage rotor system 2 includes a high-speed shaft drive motor 21, a high-speed shaft flexible coupling 22, a first sliding bearing 23, a high-speed shaft 24, an outer ring gland 25, a first sliding bearing seat 26 and a high-speed shaft drive motor base. 27; The upper surfaces of the high-speed shaft drive motor base 27 and the first sliding bearing seat 26 are respectively connected to the high-speed shaft driving motor 21 and the first sliding bearing 23, and the lower surfaces of the high-speed shaft driving motor base 27 and the first sliding bearing seat 26 are tested with The table base 1 is connected; the first sliding bearing 23 is used to support the high-speed shaft 24, and the high-speed shaft flexible coupling 22 connects the driving shaft of the high-speed shaft drive motor 21 with one end of the high-speed shaft 24; the outer ring gland 25 It is connected and fixed at the other end of the high-speed shaft 24 to compress the outer ring of the intermediate bearing 3, so that the outer ring of the intermediate bearing 3 rotates synchronously with the high-speed shaft 24; The high-speed shaft 24 is a hollow shaft, and the side walls of both ends are respectively provided with a high-speed shaft front end through hole 241 and a high-speed shaft rear end through hole 242, a high-speed shaft front through hole 241 and a high-speed shaft rear through hole. 242 forms a passage with the hollow shaft;

The low-pressure rotor system 4 includes a low-speed shaft drive motor 41 , a low-speed shaft flexible coupling 42 , a third sliding bearing 43 , a low-speed shaft 44 , a second sliding bearing 45 , an inner ring gland 46 , and a second sliding bearing seat 47 , the third sliding bearing seat 48 and the low-speed shaft drive motor base 49; the upper surfaces of the low-speed shaft driving motor base 49, the second sliding bearing seat 47 and the third sliding bearing seat 48 are respectively connected to the low-speed shaft driving motor 41, the first Two sliding bearings 45 and a third sliding bearing 43; the second sliding bearing 45 and the third sliding bearing 43 are used to support the entire low-pressure rotor system 4; the low-speed shaft flexible coupling 42 drives the low-speed shaft to the driving shaft of the motor 41 It is connected with one end of the low-speed shaft 44, and the other end of the low-speed shaft 44 is connected with the inner ring gland 46, which presses the inner ring of the intermediate bearing 3, so that the inner ring of the intermediate bearing 3 rotates synchronously with the low-pressure rotor system 4; the low-speed shaft 44 is a hollow shaft, one end side wall of the low speed shaft 44 is provided with a front end through hole 441 of the low speed shaft, and the other end side wall is provided with a rectangular slot hole. passage; on the inner ring gland 46, a rectangular slot of the same size is opened at the corresponding position of the rectangular slot of the low-speed shaft 44;

The test system 5 includes a low-speed shaft electrical slip ring 51, a high-speed shaft electrical slip ring 52, a collection device 53, a computer 54, an inner ring sensor 55 and an outer ring sensor 56; the low-speed shaft electrical slip ring 51 is set at a low speed. Between the shaft coupling 42 and the through hole 441 at the front end of the low-speed shaft, and fixed on the low-speed shaft 44; the strain gauge of the inner ring sensor 55 is arranged on the inner ring of the intermediate bearing 3, passing through the inner ring gland 46 and the low-speed shaft. The rectangular slot hole of 44 enters the hollow shaft of the low-speed shaft 44, passes through the through hole 441 at the front end of the low-speed shaft and is connected to the inner lead wire of the low-speed shaft electric slip ring 51; the high-speed shaft electric slip ring 52 is arranged in the high-speed shaft coupling The strain gauge of the outer ring sensor 56 is arranged on the outer ring of the intermediate bearing 3, passes through the rectangular slot hole of the outer ring gland 25, and then Pass through the rear end through hole 242 of the high-speed shaft, enter the hollow shaft of the high-speed shaft 24, pass through the through-hole 241 at the front end of the high-speed shaft and connect to the inner lead wire of the high-speed shaft electric slip ring 52; 51 and the outer ring of the high-speed shaft electric slip ring 52 are led out, connected to the acquisition device 53, and finally connected to the computer 54;

The load simulation device 6 includes a centrifugal load loading device 61 and a radial load loading device 62; the centrifugal load loading device 61 has a plurality of centrifugal loading discs respectively fixed on the high-speed shaft 24 and the low-speed shaft 44, A hole is used to set the unbalance amount, and the centrifugal load of the intermediate bearing 3 is simulated by changing the unbalanced mass of the centrifugal loading plate; the radial load loading device 62 is installed above the test bench base 1, and is relative to the position of the centrifugal loading plate. Correspondingly, there is a gap between the radial load loading device 62 and the centrifugal loading disc. The radial load loading device 62 is non-contact electromagnetic loading, and the magnitude of the radial load is changed by changing the current of the electromagnetic loading device.

The temperature environment simulation device 7 is of a left and right split structure, which includes a thermal insulation box 71 and a heating resistance wire 72 arranged inside the thermal insulation box 71. The front and rear side walls of the thermal insulation box 71 are provided with through holes for the high-voltage rotor system 2. Passing through the low-pressure rotor system 4 to accommodate the intermediate bearing 3 in the heat preservation box 71 , simulating the working state of the intermediate bearing 3 in a high temperature environment.

Further, the first sliding bearing 23 , the second sliding bearing 45 and the third sliding bearing 43 are all sliding bearings, so as to avoid interfering with the test frequency of the intermediate bearing 3 .

Further, the high-speed shaft flexible coupling 22 and the low-speed shaft flexible coupling 42 only transmit torque and do not transmit radial vibration, which are used to isolate the vibration of the high-speed shaft drive motor 21 and the low-speed shaft drive motor 41 and transmit them to the intermediary. Bearing 3.

Further, the high-speed shaft flexible coupling 22 has a convex groove on one side, and the convex groove is sleeved on one end of the high-speed shaft 24 and is fixed on the high-speed shaft 24 by bolting.

Further, the low-speed shaft flexible coupling 42 has a convex groove on one side, the convex groove is sleeved on the front end of the low-speed shaft 44, and is connected by bolts to be fixed on the low-speed shaft 44.

The effects and benefits of the present invention are:

1) The intermediate bearing vibration test device provided by the present invention adopts a flexible coupling and a sliding bearing, which realizes vibration isolation and avoids the vibration interference of the driving system and the support device to the vibration of the intermediate bearing;

2) The load simulation of the intermediate bearing vibration test device provided by the present invention adopts a centrifugal loading plate and an electromagnetic loading device to avoid interference during the radial load application process;

3) The sensor of the intermediate bearing vibration test device provided by the present invention can be directly arranged on the inner and outer rings of the intermediate bearing body to effectively obtain the vibration signal of the intermediate bearing;

4) The intermediate bearing vibration test device provided by the present invention adopts a temperature environment simulation device to simulate the high temperature environment when the intermediate bearing is working.

Description of drawings

Figure 1: Overall structure diagram of the intermediate bearing vibration test device;

Figure 2: Front view of the high-pressure rotor system of the intermediate bearing vibration test device;

Figure 3(a): Three-dimensional exploded view of the high-speed shaft structure of the intermediate bearing vibration test device;

Figure 3(b): Cross-sectional view of the high-speed shaft structure of the intermediate bearing vibration test device;

Figure 3(c): Front view of the outer ring gland structure of the intermediate bearing vibration test device;

Figure 3(d): Left view of the outer ring gland structure of the intermediate bearing vibration test device;

Figure 4: Front view of the low-pressure rotor system of the intermediate bearing vibration test device;

Figure 5(a): Three-dimensional exploded view of the low-speed shaft structure of the intermediate bearing vibration test device;

Figure 5(b): Cross-sectional view of the low-speed shaft structure of the intermediate bearing vibration test device;

Figure 6(a): Front view of the test system of the intermediate bearing vibration test device;

Figure 6(b): Cross-sectional view of the test system of the intermediate bearing vibration test device;

Figure 6(c): The installation position diagram of the intermediate bearing inner ring sensor of the intermediate bearing vibration test device;

Figure 6(d): The installation position diagram of the intermediate bearing outer ring sensor of the intermediate bearing vibration test device;

Figure 7: Front view of the load simulation device of the intermediate bearing vibration test device;

Figure 8: Overall structure diagram of the temperature environment simulation device of the intermediate bearing vibration test device.

In the picture: 1 test bench base; 2 high pressure rotor system; 3 intermediate bearing; 4 low pressure rotor system; 5 test system; 6 load simulation device; 7 temperature environment simulation device; 21 high-speed shaft drive motor; 22 high-speed shaft flexible coupling 23 first sliding bearing; 24 high speed shaft; 25 outer ring gland; 26 first sliding bearing seat; 27 high speed shaft drive motor base; 241 high speed shaft front through hole; 242 high speed shaft rear through hole; 41 low speed shaft Drive motor; 42 low speed shaft flexible coupling; 43 third sliding bearing; 44 low speed shaft; 45 second sliding bearing; 46 inner ring gland; 47 second sliding bearing seat; 48 third sliding bearing seat; 49 low speed shaft Drive motor base; 441 low-speed shaft front through hole; 51 low-speed shaft electric slip ring; 52 high-speed shaft electric slip ring; 53 acquisition device; 54 computer; 55 inner ring sensor; 56 outer ring sensor; 61 centrifugal load loading device; 62 diameter Loading device to load; 71 incubator; 72 heating resistance wire.

Detailed ways

The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and technical solutions.

It should be understood that the appended drawings are not to scale, presenting a suitably simplified representation of various features illustrative of the basic principles of the invention. The specific design features of the invention disclosed herein, including, for example, the specific dimensions, orientations, locations, and profiles will be determined in part by the specific intended application and use environment.

In the accompanying figures, the same or equivalent parts (elements) are referenced with the same reference numerals.

In the description of the present invention, it should be noted that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right", " The orientation or positional relationship indicated by vertical, horizontal, top, bottom, inner, outer, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and The description is simplified rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

1 , the intermediate bearing vibration test device includes a test bed base 1 , a high pressure rotor system 2 , a low pressure rotor system 4 , a test system 5 , a load simulation device 6 , and a temperature environment simulation device 7 . The test bench base 1 is used to support, install and fix other test devices. The high pressure rotor system 2 and the low pressure rotor system 4 are used to make the inner and outer rings of the intermediate bearing 3 rotate at different speeds. The intermediate bearing 3 is the tested bearing. The testing system 5 is used for testing transmission and collecting the vibration signal of the intermediate bearing 3 . The load simulation device 6 is used to simulate the centrifugal load and radial load received by the intermediate bearing 3 . The temperature environment simulation device 7 is used to simulate the high temperature environment of the intermediate bearing 3 .

Figure 2 shows the installation and arrangement of the drive device, the connection device, the support device and the clamping device of the high-pressure rotor system. 2, the high-voltage rotor system 2 includes a high-speed shaft drive motor 21, a high-speed shaft flexible coupling 22, a first sliding bearing 23, a high-speed shaft 24, an outer ring gland 25, a first sliding bearing seat 26, and a high-speed shaft drive motor. Base 27. The high-speed shaft drive motor base 27 and the upper surfaces of the first sliding bearing seat 26 are respectively connected by bolts to install and fix the high-speed shaft driving motor 21 and the first sliding bearing 23 . The lower surfaces of the high-speed shaft drive motor base 27 and the first sliding bearing seat 26 are connected to the test bench base 1 . The high-speed shaft drive motor 21 is used to drive the rotation of the high-voltage rotor system 2 . The first sliding bearing 23 is used to support the high-speed shaft 24 , and the previous rolling bearing is replaced by a sliding bearing here, so as to avoid that the vibration frequency of the supporting rolling bearing during the test will interfere with the test frequency of the intermediate bearing 3 . The driving shaft of the high-speed shaft drive motor 21 is connected with a high-speed shaft flexible coupling 22 through a flat key connection, and the driving shaft of the high-speed shaft driving motor 21 is connected with one end of the high-speed shaft 24 through the high-speed shaft flexible coupling 22 . The high-speed shaft flexible coupling 22 only transmits torque and does not transmit radial vibration, and is used to isolate the vibration of the high-speed shaft drive motor 21 from being transmitted to the intermediate bearing 3 to reduce its vibration frequency from interfering with the vibration test of the intermediate bearing 3 . The outer ring gland 25 is bolted to the other end of the high-speed shaft 24 , that is, the end of the high-pressure rotor system 2 , for pressing the outer ring of the intermediate bearing 3 , so that the outer ring of the intermediate bearing 3 rotates synchronously with the high-speed shaft 24 . In the test, the speed of the outer ring of the intermediate bearing 3 is controlled by controlling the speed of the high-speed shaft drive motor 21 .

FIGS. 3( a ), 3 ( b ), 3 ( c ) and 3 ( d ) are schematic diagrams of the structural features of the high-speed shaft 24 and the outer ring gland 25 . 3 (a), 3 (b), the high-speed shaft flexible coupling 22 has a convex groove on one side, the convex groove is sleeved on the front end of the high-speed shaft 24, and is fixed on the high-speed shaft 24 by bolting. The high-speed shaft 24 is a hollow shaft. The front end and rear end side walls of the high speed shaft 24 are respectively provided with a high speed shaft front end through hole 241 and a high speed shaft rear end through hole 242 of the same size. The high speed shaft front end through hole 241 and the high speed shaft rear end through hole 242 of the high speed shaft 24 and the hollow shaft form a passage. 3(a), 3(c) and 3(d), the outer ring gland 25 has four rectangular slot holes around its inner ring, and the vertical height of the slot holes is higher than that of the intermediate bearing 3 The inner diameter of the outer ring. During assembly, the end of the high-speed shaft 24 connected to the outer ring gland 25 is provided with a slotted hole, and the outer ring of the intermediate bearing 3 is inserted into the slotted hole at the end of the high-speed shaft 24 . The outer ring gland 25 is annular, and the outer ring gland 25 is connected with the end face of the high-speed shaft 24 through bolts to tightly press the outer ring of the intermediate bearing 3 .

Figure 4 shows the installation and arrangement of the drive device, the connection device, the support device and the clamping device of the low-pressure rotor system. 4, the low-pressure rotor system 4 includes a low-speed shaft drive motor 41, a low-speed shaft flexible coupling 42, a third sliding bearing 43, a low-speed shaft 44, a second sliding bearing 45, an inner ring gland 46, and a second sliding bearing seat 47. The third sliding bearing seat 48 and the low-speed shaft drive motor base 49. The low pressure rotor system 4 is similar to the high pressure rotor system 2 in terms of installation and function of the drive, connection, and support means. The upper surfaces of the low-speed shaft drive motor base 49 , the second sliding bearing seat 47 and the third sliding bearing seat 48 are respectively bolted to install and fix the low-speed shaft driving motor 41 , the second sliding bearing 45 and the third sliding bearing 43 . The low-speed shaft drive motor 41 is used to drive the rotation of the low-voltage rotor system 4 . The two sliding bearings are functionally the same as the first sliding bearing 23 and are used to support the entire low-pressure rotor system 4 and reduce the interference to the vibration frequency of the inner ring of the intermediate bearing. A low-speed shaft flexible coupling 42 is installed on the driving shaft of the low-speed shaft drive motor 41 through a flat key connection. The low-speed shaft flexible coupling 42 is functionally the same as the high-speed shaft flexible coupling 22 , and reduces the interference to the vibration of the inner ring of the intermediate bearing 3 . An inner ring gland 46 is installed at the rear end of the low-speed shaft 44 through a screw connection, which tightly presses the inner ring of the intermediate bearing 3 , so that the inner ring of the intermediate bearing 3 rotates synchronously with the low pressure rotor system 4 . The rotational speed of the inner ring of the intermediate bearing 3 is controlled by controlling the rotational speed of the low-speed shaft drive motor 41 .

FIG. 5( a ) and FIG. 5( b ) are schematic diagrams of the structural features of the low-speed shaft 44 and the inner ring gland 46 . 5(a) and 5(b), the low-speed shaft 44 and the high-speed shaft 24 have similar structural features. The low-speed shaft flexible coupling 42 has a convex groove on one side, the convex groove is sleeved on the front end of the low-speed shaft 44 , and is connected by bolts to be fixed on the low-speed shaft 44 . The low-speed shaft 44 is a hollow shaft. The front end of the low-speed shaft 44 is provided with a front-end through hole 441 of the low-speed shaft, and the rear end is provided with a rectangular slot hole. The low-speed shaft front through hole 441 at the front end of the low-speed shaft 44 , the slot hole and the hollow shaft hole at the rear end form a passage. The inner ring gland 46 and the rear end of the low-speed shaft 44 are provided with rectangular slots of the same size at the same position. During assembly, the inner ring of the intermediate bearing 3 is sleeved on the shaft at the end of the low-speed shaft 44 and is fixed and pressed by the inner ring gland 46. The ring gland 46 is connected to the end face of the low-speed shaft 44 by screwing, so as to tightly press the inner ring of the intermediate bearing 3 .

6(a), 6(b), 6(c) and 6(d), the test system 5 includes a low-speed shaft electric slip ring 51, a high-speed shaft electric slip ring 52, a collection device 53, a computer 54, an internal Ring sensor 55 and outer ring sensor 56 . The low-speed shaft electric slip ring 51 is installed between the low-speed shaft coupling 42 and the low-speed shaft front end through hole 441 at the front end of the low-speed shaft 44 , and is fixed on the low-speed shaft 44 . The strain gauge of the inner ring sensor 55 is installed on the inner ring of the intermediate bearing 3, passes through the inner ring gland 46 and the rectangular slot at the rear end of the low-speed shaft 44, enters the hollow shaft of the low-speed shaft 44, and passes out of the front end of the low-speed shaft 44. The through hole 441 at the front end of the low-speed shaft is connected to the inner lead wire of the low-speed shaft electric slip ring 51 . The high-speed shaft electric slip ring 52 is installed between the high-speed shaft coupling 22 and the high-speed shaft front end through hole 241 at the front end of the high-speed shaft, and is fixed on the high-speed shaft 24 . The strain gauge of the outer ring sensor 56 is installed on the outer ring of the intermediate bearing 3, passes through the slot hole of the outer ring gland 25, and then passes through the rear end through hole 242 of the high speed shaft at the rear end of the high speed shaft 24, and enters the hollow shaft of the high speed shaft 24. Inside, the through hole 241 at the front end of the high speed shaft 24 passes through the front end of the high speed shaft and is connected to the inner lead wire of the high speed shaft electric slip ring 52 . The test circuit is drawn from the outer ring of the low-speed shaft electric slip ring 51 and the high-speed shaft electric slip ring 52 , connected to the acquisition device 53 , and finally connected to the computer 54 . When working, the high pressure rotor system 2 and the low pressure rotor system 4 drive the inner and outer rings of the intermediate bearing 3, the inner ring of the low-speed shaft electric slip ring 51, the inner ring of the high-speed shaft electric slip ring 52, the test circuit, the inner ring sensor 55, the outer ring The sensor 56 rotates synchronously, while the outer ring of the low-speed shaft electric slip ring 51 and the outer ring of the high-speed shaft electric slip ring 52 do not rotate. The inner ring of the low-speed shaft electric slip ring 51 and the inner ring of the high-speed shaft electric slip ring 52 transmit the vibration signal of the intermediate bearing 3 to the outer ring of the low-speed shaft electric slip ring 51 and the outer ring of the high-speed shaft electric slip ring 52 respectively, and The collected signal is then transmitted to the collection device 53, and finally displayed on the computer 54 for analysis and processing.

With reference to FIG. 7 , the load simulation device 6 includes a centrifugal load loading device 61 and a radial load loading device 62 . The centrifugal load loading device 61 has a plurality of centrifugal loading discs respectively fixed on the high-speed shaft 24 and the low-speed shaft 44, and the centrifugal loading discs have a plurality of holes for setting the unbalance amount. The radial load loading device 62 is installed above the test bed base 1 and corresponds to the centrifugal loading plate, and there is a gap between the radial load loading device 62 and the centrifugal loading plate. The centrifugal load loading device 61 simulates the centrifugal load of the intermediate bearing 3 by changing the unbalanced mass of the centrifugal loading disc. The radial load loading device 62 is a non-contact electromagnetic loading. The magnitude of the radial load is changed by changing the current of the electromagnetic loading device. The electromagnetic loading device is loaded in a non-contact manner to avoid interference to the vibration of the intermediate bearing 3 during the loading process. The load loading device 62 can move along the axial direction of the rotating shaft and move to different loading plates to simulate loads at different load positions.

8, the temperature environment simulation device 7 is a left and right split structure, which is convenient for the installation of the test piece; the temperature environment simulation device 7 includes an insulation box 71 and a heating resistance wire 72, and the left and right insulation boxes 71 are connected into one. The front and rear side walls have through holes, and there is a gap with the high-pressure rotor system 2 and the low-pressure rotor system 4, for the high-pressure rotor system 2 and the low-pressure rotor system 4 to pass through, so as to accommodate the intermediate bearing 3 in the insulation box 71, forming a joint heating equipment. The heating resistance wire 72 is controlled to generate heat, and the simulated temperature of the intermediate bearing 3 is required to simulate the working state of the intermediate bearing 3 in a high temperature environment.

The descriptions presented above of the exemplary embodiments are intended only to illustrate technical solutions of the present invention, and are not intended to be exhaustive, nor to limit the invention to the precise forms described. Obviously, many modifications and variations are possible for those of ordinary skill in the art in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and their practical applications, to thereby facilitate others skilled in the art to understand, implement and utilize the various exemplary embodiments of the invention and various alternatives thereof and modified form. The scope of the present invention is intended to be limited by the appended claims and their equivalents.

Claims (8)

1. The vibration test device for the intermediary bearing comprises a test bed base (1), a high-pressure rotor system (2) and a low-pressure rotor system (4), wherein the high-pressure rotor system (2) and the low-pressure rotor system (4) are arranged on the test bed base (1); the high-pressure rotor system (2) comprises a high-speed shaft driving motor (21) and a high-speed shaft (24), and the outer ring of the intermediate bearing (3) is fixed at one end of the high-speed shaft (24); the low-voltage rotor system (4) comprises a low-speed shaft driving motor (41) and a low-speed shaft (44), and an inner ring of the intermediate bearing (3) is fixed at one end of the low-speed shaft (44); the device is characterized by further comprising a test system (5), a load simulation device (6) and a temperature environment simulation device (7), wherein the test system (5), the load simulation device (6) and the temperature environment simulation device (7) are arranged on the test bed base (1); the high-pressure rotor system (2) and the low-pressure rotor system (4) are used for enabling the inner and outer rings of the intermediate bearing (3) to rotate at different speeds; the test system (5) is used for testing, transmitting and collecting vibration signals of the intermediate bearing (3); the load simulation device (6) is used for simulating centrifugal load and radial load which are applied to the intermediate bearing (3); the temperature environment simulation device (7) is used for simulating the high-temperature environment of the intermediate bearing (3); wherein:

the high-pressure rotor system (2) further comprises a high-speed shaft flexible coupling (22), a first sliding bearing (23), an outer ring gland (25), a first sliding bearing seat (26) and a high-speed shaft driving motor base (27); the upper surfaces of a high-speed shaft driving motor base (27) and a first sliding bearing seat (26) are respectively connected with a high-speed shaft driving motor (21) and a first sliding bearing (23), and the lower surfaces of the high-speed shaft driving motor base (27) and the first sliding bearing seat (26) are connected with a test bed base (1); the first sliding bearing (23) is used for supporting the high-speed shaft (24), and the high-speed shaft flexible coupling (22) connects the driving shaft of the high-speed shaft driving motor (21) with one end of the high-speed shaft (24); the outer ring gland (25) is connected and fixed at the other end of the high-speed shaft (24) and is used for compressing the outer ring of the intermediary bearing (3) so that the outer ring of the intermediary bearing (3) synchronously rotates along with the high-speed shaft (24); the outer ring gland (25) is provided with four rectangular slotted holes around the inner ring; the high-speed shaft (24) is a hollow shaft, the side walls of two ends of the high-speed shaft are respectively provided with a high-speed shaft front end through hole (241) and a high-speed shaft rear end through hole (242), and the high-speed shaft front end through hole (241) and the high-speed shaft rear end through hole (242) form a passage with the hollow shaft;

the low-pressure rotor system (4) further comprises a low-speed shaft flexible coupling (42), a third sliding bearing (43), a second sliding bearing (45), an inner ring gland (46), a second sliding bearing seat (47), a third sliding bearing seat (48) and a low-speed shaft driving motor base (49); the upper surfaces of the low-speed shaft driving motor base (49), the second sliding bearing seat (47) and the third sliding bearing seat (48) are respectively connected with the low-speed shaft driving motor (41), the second sliding bearing (45) and the third sliding bearing (43); the second sliding bearing (45) and the third sliding bearing (43) are used for supporting the whole low-pressure rotor system (4); the low-speed shaft flexible coupling (42) connects a driving shaft of a low-speed shaft driving motor (41) with one end of a low-speed shaft (44), and the other end of the low-speed shaft (44) is connected with an inner ring gland (46) which presses an inner ring of the intermediary bearing (3) so that the inner ring of the intermediary bearing (3) synchronously rotates along with the low-pressure rotor system (4); the low-speed shaft (44) is a hollow shaft, a low-speed shaft front end through hole (441) is formed in the side wall of one end of the low-speed shaft (44), a rectangular groove hole is formed in the side wall of the other end of the low-speed shaft (44), and the low-speed shaft front end through hole (441), the rectangular groove hole and the hollow shaft form a passage; rectangular slotted holes with the same size are formed in the positions, corresponding to the rectangular slotted holes of the low-speed shaft (44), of the inner ring gland (46);

the testing system (5) comprises a low-speed shaft electric slip ring (51), a high-speed shaft electric slip ring (52), a collecting device (53), a computer (54), an inner ring sensor (55) and an outer ring sensor (56); the low-speed shaft electric slip ring (51) is arranged between the low-speed shaft coupler (42) and the front end through hole (441) of the low-speed shaft and is fixed on the low-speed shaft (44); a strain gauge of the inner ring sensor (55) is arranged on an inner ring of the intermediate bearing (3), passes through a rectangular slotted hole of the inner ring gland (46) and the low-speed shaft (44), enters a hollow shaft of the low-speed shaft (44), passes through a through hole (441) at the front end of the low-speed shaft and is connected into an inner ring lead of the low-speed shaft electric slip ring (51); the high-speed shaft electric slip ring (52) is arranged between the high-speed shaft coupler (22) and the high-speed shaft front end through hole (241) and is fixed on the high-speed shaft (24), a strain gauge of the outer ring sensor (56) is arranged on an outer ring of the intermediate bearing (3), penetrates through a rectangular slotted hole of the outer ring gland (25), then penetrates through the high-speed shaft rear end through hole (242), enters the hollow shaft of the high-speed shaft (24), and penetrates out of the high-speed shaft front end through hole (241) and is connected into an inner ring lead of the high-speed shaft electric slip ring (52); the test circuit is led out from the outer rings of the low-speed shaft electric slip ring (51) and the high-speed shaft electric slip ring (52), is connected to the acquisition device (53), and is finally connected to a computer (54);

the load simulation device (6) comprises a centrifugal load loading device (61) and a radial load loading device (62); the centrifugal load loading device (61) is provided with a plurality of centrifugal loading discs which are respectively fixed on the high-speed shaft (24) and the low-speed shaft (44), the centrifugal loading discs are provided with a plurality of holes for setting unbalance, and the centrifugal load of the intermediate bearing (3) is simulated by changing the unbalance mass of the centrifugal loading discs; the radial load loading device (62) is arranged above the test bed base (1) and corresponds to the position of the centrifugal loading disc, a gap exists between the radial load loading device (62) and the centrifugal loading disc, the radial load loading device (62) is in non-contact electromagnetic loading, and the magnitude of the radial load is changed by changing the current magnitude of the electromagnetic loading device;

the temperature environment simulation device (7) is of a left-right split type structure and comprises an insulation box (71) and a heating resistance wire (72) arranged inside the insulation box (71), through holes are formed in the front side wall and the rear side wall of the insulation box (71) and used for enabling the high-pressure rotor system (2) and the low-pressure rotor system (4) to penetrate through, so that the intermediary bearing (3) is contained in the insulation box (71), and the working state of the intermediary bearing (3) under the high-temperature environment is simulated.

2. The intermediary bearing vibration test apparatus according to claim 1, wherein the first sliding bearing (23), the second sliding bearing (45) and the third sliding bearing (43) are all sliding bearings so as to avoid interference with the intermediary bearing (3) test frequency.

3. The intermediary bearing vibration test device according to claim 1 or 2, wherein the high-speed shaft flexible coupling (22) and the low-speed shaft flexible coupling (42) transmit only torque, do not transmit radial vibration, and are used for isolating vibration of the high-speed shaft driving motor (21) and the low-speed shaft driving motor (41) from being transmitted to the intermediary bearing (3).

4. An intermediate bearing vibration test device as claimed in claim 1 or 2, wherein the flexible coupling (22) of the high speed shaft has a convex groove on one surface, and the convex groove is sleeved on one end of the high speed shaft (24) and is fixed on the high speed shaft (24) through bolt connection.

5. The device for testing vibration of an intermediate bearing according to claim 3, wherein the flexible coupling (22) of the high speed shaft has a convex groove on one surface thereof, and the convex groove is sleeved on one end of the high speed shaft (24) and is fixed on the high speed shaft (24) through a bolt connection.

6. An intermediary bearing vibration test device according to claim 1, 2 or 5, wherein the flexible coupling (42) of the low speed shaft has a convex groove on one side, the convex groove is sleeved on the front end of the low speed shaft (44) and is fixed on the low speed shaft (44) through bolt connection.

7. The medium bearing vibration test device according to claim 3, wherein the low speed shaft flexible coupling (42) has a convex groove on one surface, and the convex groove is sleeved on the front end of the low speed shaft (44) and fixed on the low speed shaft (44) through bolt connection.

8. The medium bearing vibration test device according to claim 4, wherein the low speed shaft flexible coupling (42) has a convex groove on one surface, and the convex groove is sleeved on the front end of the low speed shaft (44) and fixed on the low speed shaft (44) through bolt connection.

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