CN102564764B - Aircraft engine spindle bearing testing machine - Google Patents

Abstract

The invention belongs to the aircraft bearing detecting technology and provides an aircraft engine spindle bearing testing machine. a testing mechanism of the aircraft engine spindle bearing testing machine mainly comprises a cantilever supporting mechanism of a testing bearing (15), axial and radial loading mechanisms, a driving mechanism, a transmission mechanism and a heating device (23) as well as a detecting and collecting device, wherein the axial and radial loading mechanisms are used for applying changing torque and size alternation to the testing bearing (15); the heating device (23) is used for heating the testing bearing (15); two types of transmission shafts (5) are arranged; and one type of the transmission shafts is used for testing low load and high rotation speed of the testing bearing while the other type is a fixed structure used for testing bearings with diameters of more than 100 mm and bearings with rotation speeds of less than 25000 rpm in the testing bearings. According to the invention, through three groups of transmission shafts of two sets of testing mechanisms, the testing range of the testing bearing of the testing machine is enlarged.

Description

Aeroengine Spindle Bearing Testing Machine

technical field

The invention belongs to the detection technology of aviation bearings, and mainly relates to a testing machine for main shaft bearings of aviation engines.

technical background

The main shaft bearing of the aero-engine is an important transmission component of the aero-engine. With the development of the aviation industry, the main shaft bearing of the aero-engine has been perfected and improved, from the initial low speed and low load to today's high speed and high load. Aero-engine main shaft bearings play a vital role in the operation of aero-engines. During the working process of aero-engines, aero-engine main shaft bearings not only bear high speed, high load, but also carry out long-term the running of time. In order to improve the working quality of the aero-engine, the speed and load performance parameters of the main shaft bearing of the aero-engine must be improved first. At present, there is no well-designed aero-engine main shaft bearing testing machine and relatively scientific and reasonable test and detection methods, which to a certain extent have restricted the inspection and test progress of aero-engine main shaft bearings, thereby restricting the improvement of the performance parameters of aero-engine main shaft bearings. with perfect pace.

In the prior art, the test mechanism in the test machine of the main shaft bearing of the aero-engine generally adopts the transmission shaft system fixed on the bed, which can only be used for the high-speed test or high-load test of the test bearing within a certain bearing size, and the structure is relatively simple. To a certain extent, it restricts the pace of improvement and perfection of the performance parameters of the main shaft bearing of the aero-engine.

Contents of the invention

In order to solve the above-mentioned technical problems, the object of the present invention is to propose an aero-engine main shaft bearing testing machine.

The present invention adopts following technical scheme for accomplishing above-mentioned invention purpose:

An aero-engine spindle bearing testing machine, the testing mechanism of the spindle bearing testing machine mainly includes a cantilever support mechanism for a test bearing, an axial and radial loading mechanism for applying a varying torque and alternating magnitudes to the test bearing, a drive Mechanism, transmission mechanism, heating device and detection acquisition device for heating the test bearing; the cantilever support mechanism is used for positioning the test bearing and making the test bearing cantilever structure located at one end of the test shaft, forming the inner part of the test bearing 1. A structure that can rotate relatively between the outer rings; the electric spindle of the driving mechanism is connected with the transmission shaft in the transmission mechanism, and the transmission shaft is connected with the test shaft of the test bearing, so that the test bearing is connected with the electric spindle Rotating and rotating structure; there are two kinds of transmission shafts, one of which is used for the low-load and high-speed test of the test bearing, and the diameter range of the test bearing is more than 100mm; the speed range is below 25000rpm; A transmission shaft is used for the test of high-load and low-speed test bearings. The diameter range of the test bearing is less than 100mm; the speed range is above 25000rpm.

The test mechanism is divided into two groups, and the transmission shaft of one group of test mechanism is used to test bearings whose diameter range is less than 100mm; the speed range is above 25000rpm. It is used to meet the high speed or high load required in the bearing test; the transmission shaft of another group of test institutions is a fixed structure, and it is used for testing bearings with a diameter range of 100mm or more; the test of bearings with a speed range of 25000rpm or less.

One end of the transmission shaft is provided with a test bearing in a cantilever structure, that is, the test bearing is installed in the loading jacket, the inner ring of the test bearing is fixed on the test shaft, and the test shaft is connected to the end surface of the transmission shaft. Make the inner ring of the test bearing rotate at the same speed as the actual working condition to ensure the speed required for the test.

The axial loading structure in the axial and radial loading mechanism includes an axial loading cylinder and an axial loading rod connected with the axial loading cylinder; the axial loading rod is in contact with the test bearing gland to realize axial loading. Loading; the radial loading structure includes a radial loading cylinder and a rod end joint bearing connected to the radial loading cylinder; the rod end joint bearing is connected to a loading fork connected to the loading outer sleeve to realize radial loading; the The above-mentioned axial loading oil cylinder and radial loading oil cylinder are fixed on the bed of the testing machine and can be adjusted in position.

The heating device set up for heating the test bearing is connected in series on the lubricating oil circuit of the test bearing to realize the heating and lubrication of the test bearing.

The detection and acquisition device includes a temperature sensor and a vibration sensor, wherein the temperature sensor is located on the loading sleeve of the non-rotating outer ring of the test bearing; the set vibration sensor is fixed on the loading sleeve of the non-rotating outer ring of the test bearing.

An aero-engine main shaft bearing testing machine proposed by the present invention increases the testing range of the test bearing of the testing machine through three sets of transmission shafts of two sets of testing mechanisms. The test bearing is in a cantilever structure during the test, and the inner ring rotates with the electric main shaft , while rotating, apply axial load and radial load simultaneously or separately and make axial load and radial load applied to the outer ring of the test bearing; at the same time, it can also be heated by a heating device connected in series on the lubricating oil circuit of the test bearing The test bearing is lubricated and heated, and sprayed onto the test bearing through the lubrication system to simulate the actual working condition of the main shaft bearing of the aero-engine for the test; a vibration and temperature sensor is placed on the outer ring of the test bearing, and the temperature sensor is connected to the outer ring of the test bearing Contact with each other, collect the working condition data of the test bearing during the test, and send the collected signal data such as temperature and vibration to the computer for analysis and judgment by the computer to make a diagnosis, which has the characteristics of true and accurate detection.

Description of drawings

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

Fig. 2 is a structural schematic diagram of the cantilever support mechanism in the present invention.

Fig. 3 is a structural schematic diagram of the transmission mechanism in the present invention.

Fig. 4 is a structural schematic diagram of the axial and radial loading mechanism in the present invention.

In the figure: 1. Bed, 2. Electric spindle, 3. Electric spindle casting box, 4. Transmission connection plate, 5. Transmission shaft, 6. Oil seal ring, 7. Intermediate spacer, 8. Transmission casting box, 9 , Bearing bushing, 10, Support bearing, 11, Test shaft, 12, Test bearing gland, 13, Lock nut, 14, Loading jacket, 15, Test bearing, 16, Axial loading rod, 17, First pressure Sensor, 18, axially loaded oil cylinder, 19, weak current box, 20, rod end joint bearing, 21, second pressure sensor, 22, radially loaded oil cylinder, 23, heating device.

Detailed ways

The present invention is described in conjunction with accompanying drawing and specific embodiment;

As shown in Figure 1, a kind of aero-engine main shaft bearing testing machine, the test mechanism that described main shaft bearing testing machine has mainly comprises the cantilever support mechanism of test bearing 15, applies the torque of change and the shaft of alternating size to test bearing 15 Direction, radial loading mechanism, driving mechanism, transmission mechanism and the heating device 23 and detection acquisition device for heating the test bearing; the cantilever support mechanism is used for positioning the test bearing 15 and making the test bearing 15 cantilever structure Located at one end of the test shaft 11, it constitutes a relatively rotatable structure between the inner and outer rings of the test bearing 15; the electric spindle 2 of the drive mechanism is connected to the transmission shaft 5 in the transmission mechanism, and the transmission shaft 5 is connected to the test shaft. The test shaft 11 of the bearing 15 is connected to form the structure that the test bearing 15 rotates with the rotation of the electric spindle; there are two kinds of transmission shafts, one of which is used for the low-load and high-speed test of the test bearing , used for test bearings with a diameter range above 100mm; test bearings with a speed range below 25000rpm; another transmission shaft used for testing bearings with high loads and low speeds, test bearings with a diameter range below 100mm; Speed range The speed range is above 25000rpm.

The test mechanism is divided into two groups, and the transmission shaft of one group of test mechanism is used to test bearings whose diameter range is less than 100mm; the speed range is above 25000rpm. It is used to meet the high speed or high load required in the bearing test; the transmission shaft of another group of test institutions is a fixed structure, and it is used for testing bearings with a diameter range of 100mm or more; the test of bearings with a speed range of 25000rpm or less.

1 and 2, the cantilever support mechanism of the test bearing has a lock nut 13 for fixing the inner ring on the test shaft 11, and the test shaft 11 is connected to the end face of the transmission shaft 5. The transmission shaft 5 is supported in the test bearing by the support bearing 10; the test bearing 15 is installed in the loading outer sleeve 14, and is compressed by the test bearing cover 12, thereby forming a cantilever structure for the test bearing and making the inner ring of the test bearing A structure that rotates with the electric spindle 2.

Referring to Figure 3, the motor of the drive mechanism transmits power to the electric spindle 2, and the electric spindle 2 is connected to the transmission shaft 5 through a soft rope, so that the rotational speed is transmitted to the transmission shaft 5, and the transmission shaft drives the test bearing. The inner ring rotates; with reference to Fig. 4, the axial loading structure in the described axial and radial loading mechanism includes an axial loading oil cylinder and an axial loading rod 18 connected with the axial loading oil cylinder; The loading cylinder 18 pushes the ball head loading rod 16 at the piston rod end to be in contact with the gland 12 of the test bearing to realize that the loading center is also on the centerline of the test shaft; the radial loading structure includes a radial loading cylinder 22, The rod end joint bearing 20 connected with the radial loading cylinder 22, the radial load is generated by pulling the radial loading fork to the loading jacket 14 through the radial loading cylinder 22 piston, so as to realize radial loading, and the radial loading is perpendicular to the test axis axis, the loading center is consistent with the center of the test; the axial loading cylinder 18 and the radial loading cylinder 22 are fixed on the bed 1 of the testing machine and their positions can be adjusted, that is, both the axial and radial loading cylinders are fixed On the loading tripod, the connection between the loading tripod and the bed is T-shaped bolt connection, and there are long T-shaped holes on the bed, which is convenient for adjusting the axial and radial loading positions of different types of test bearings to ensure the loading accuracy. Accuracy; the heating device set up for heating the test bearing is connected in series on the lubricating oil circuit of the test bearing to realize the heating and lubrication of the test bearing; the set temperature sensor is located on the loading sleeve of the non-rotating outer ring of the test bearing , directly in contact with the outer ring of the test bearing; the set vibration sensor is fixed on the loading sleeve of the non-rotating outer ring of the test bearing, and is adsorbed by a magnet to collect its vibration signal.

The heating device is a heating box.

A test method for the main shaft bearing of an aero-engine, the test bearing 15 is supported on one end of the transmission shaft 5 in a cantilever type, that is, the test bearing 15 is installed in the loading outer casing 14, the inner ring of the test bearing 15 is fixed on the test shaft 11, and the test shaft 11 is connected to the end surface of the transmission shaft 5 to form a cantilever structure of the test bearing 15; through the transmission shaft 5, the inner ring of the test bearing is rotated in accordance with the speed of the actual working condition to ensure the speed required for the test; The rotation of the test bearing 15 driven by the shaft 5 is realized by transmitting the rotating speed of the electric spindle 2 to the transmission shaft 5 through a soft rope; the axial load and the radial load can be applied to the test bearing 15 separately or simultaneously; The load is achieved by contacting the axial loading cylinder 18, the axial loading rod 16 connected to the axial loading cylinder 18, and the test bearing gland 12; A pressure sensor 17; the radial load to the test bearing loading is realized by connecting the rod end joint bearing 20 connected on the radial loading oil cylinder 22 with the loading fork connected on the loading overcoat 14 by the radial loading oil cylinder 22; The axial loading oil cylinder 18 and the radial loading oil cylinder 22 described above are fixed on the bed 1 of the testing machine and their positions can be adjusted, so that the axial loading load and the radial loading load are loaded on the loading center of the test bearing 15; The heating device 23 for heating under the working condition of the inner ring of the test bearing rotating and the outer ring being loaded is connected in series to the lubricating oil path of the test bearing 15, the lubricating oil enters the heating device, and the heated lubricating oil is sprayed on the test bearing to realize the test bearing The heating and lubrication of the test bearing; the temperature signal of the test bearing is collected through the temperature sensor on the loading outer ring of the non-rotating outer ring of the test bearing, and the vibration sensor is arranged on the loading outer ring of the non-rotating outer ring of the test bearing to collect the temperature signal of the test bearing Vibration signal, and the speed of the inner ring during the test bearing test, the applied axial load, radial load, temperature signal and vibration signal in the test condition are sent to the computer, and the computer performs the test according to its test program software. The actual condition of the test bearing during the test is detected and judged.

Claims (6)

1. an aircraft engine spindle bearing testing machine, the test mechanism that described spindle bearing testing machine has includes: driving mechanism, gear train, detect harvester, the cantilever supporting mechanism of test bearing (15), to test bearing (15) apply moment of torsion that size alternately changes axially, radial loaded mechanism, and heating arrangement (23) for test bearing (15) is heated; Described cantilever supporting mechanism is for locating test bearing (15) and making the cantilever supporting mechanism of test bearing be positioned at one end of test axle (11), and forming between the inside and outside circle of test bearing (15) can counterrotating structure; The electric main shaft (2) that described driving mechanism has is connected with the transmission shaft (5) in gear train, described transmission shaft (5) is connected with the test axle of test bearing (15), forms the structure that described test bearing (15) rotates with the rotation of electric main shaft (2); It is characterized in that: described transmission shaft (5) is two kinds needed high rotating speed or top load while being respectively used to meet bearing test; Wherein transmission shaft is for the high-revolving test of low load of test bearing, and for the bearing below the diameter range 100mm of test bearing, the range of speeds is more than 25000rpm; Another kind of transmission shaft is fixed sturcture, is more than 100mm for the diameter range of test bearing, and the range of speeds is the test of 25000rpm with lower bearing.

2. aircraft engine spindle bearing testing machine according to claim 1, is characterized in that: described test mechanism is two groups, needed high rotating speed or top load when meeting bearing test; Wherein the transmission shaft of battery of tests mechanism is for the bearing below the diameter range 100mm of test bearing, and the range of speeds is more than 25000rpm; The transmission shaft of another group test mechanism is fixed sturcture, is more than 100mm for the diameter range of test bearing, and the range of speeds is the test of 25000rpm with lower bearing.

3. aircraft engine spindle bearing testing machine according to claim 1, it is characterized in that: be provided with the test bearing (15) that is cantilever structure in one end of described transmission shaft (5), be arranged on and load in overcoat (14) by test bearing (15), the inner ring of test bearing (15) is fixed on test axle (11), test axle (11) is connected on the end face of transmission shaft (5), make the inner ring of test bearing do the rotation consistent with actual condition rotating speed by transmission shaft (5), required rotating speed while carrying out warranty test.

4. aircraft engine spindle bearing testing machine according to claim 1, is characterized in that: the axial load bar (16) that described axial loading structure axially, in radial loaded mechanism comprises axial load cylinder (18), is connected with axial load cylinder (18); Axially load bar (16) contacts with test bearing gland (12) to realize axially and loads; The spherical plain bearing rod end (20) that radial loaded structure comprises radial loaded oil cylinder (22), is connected with radial loaded oil cylinder (22); Spherical plain bearing rod end (20) be connected to the loading fork loading on overcoat (14) and be connected and realize radial loaded; On described axial load cylinder, the lathe bed that radial loaded oil cylinder is fixed on testing machine and adjustable position.

5. aircraft engine spindle bearing testing machine according to claim 1, it is characterized in that: the set lubricant passage way that is connected on test bearing for the heating arrangement (23) that test bearing is heated, in order to the heating that realizes test bearing with lubricated.

6. aircraft engine spindle bearing testing machine according to claim 1, is characterized in that: described detection harvester comprises temperature sensor and vibration transducer, and the loading that wherein said temperature sensor is positioned at the non-rotating outer ring of test bearing puts; The loading that set vibration transducer is fixed on the non-rotating outer ring of test bearing puts.