Multifunctional precision experiment device for angular contact ball bearing

Abstract

The utility model discloses a multifunctional precision experimental device for an angular contact ball bearing, which relates to the field of bearing experimental equipment and comprises a support module, a driving module, a loading module, a heating module and a measuring module. The supporting module is used for supporting a rotor through a bearing; the driving module is used for providing power for rotation of the rotor; the loading module is used for providing axial loading for an outer ring of a bearing and providing radial loading for a bearing seat; the heating module is used for heating the bearing; and the measuring module is used for measuring the axis track, friction torque, rotating speed, outer ring temperature and vibration acceleration of the working bearing. The device can provide axial and radial loading at the same time, heat the device and provide a high-temperature environment in the loading process to simulate various working conditions, and can detect the axis track, friction torque, rotating speed, outer ring temperature and vibration acceleration of the device so as to improve the performance and prolong the service life of the device and provide reference for bearing design.

Description

Technical Field

[0001] The utility model relates to the field of bearing experimental equipment, in particular to a multifunctional precision experimental device for angular contact ball bearings. Background Art

[0002] The parameter design and dynamic analysis of the aviation transmission system are of vital importance in the aviation industry and national defense science and technology. For aviation engine technology, the main shaft bearing is an important component to ensure the operation of the aircraft engine rotor. It is at the "top of the pyramid" in the field of bearings and can be called the "heart" of the aircraft engine.

[0003] As an important component of the aviation transmission system, the bearing supports the rotor to operate at high speed. Its dynamic stiffness has a huge impact on the stiffness of the entire system. Once the rotor fails, the operating accuracy of the entire transmission system will be reduced, the vibration amplitude will increase, and in severe cases, it will even directly lead to the collapse of the entire system. With the development of aviation technology, the thrust-to-weight ratio of the engine continues to increase. The thrust-to-weight ratio of the fourth-generation aircraft has reached more than 10, which puts more and more stringent requirements on the main shaft bearings of aviation engines. In order to meet the technical indicators of the rotor system, the short-term operating temperature of the bearing must be up to 300°C, and the dn value (bearing inner diameter * speed) must reach 3×10 6 mm·r / min, instantaneous contact stress reaches 2500MPa, and life requirement reaches more than 10000h.

[0004] However, long-life bearings are still immature in terms of structural design, processing technology, and testing technology in harsh environments. Currently, the design of aircraft engine main shaft bearings mostly follows the design method of civilian bearings, resulting in insufficient life of domestic aircraft engine bearings and a large number of early failure problems, which cannot fully meet the actual needs of aircraft engine mainframes. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a multifunctional precision experimental device for angular contact ball bearings, which can provide axial and radial loading at the same time, and heat it during loading to provide a high temperature environment to simulate various working conditions, and can detect its axis trajectory, friction torque, rotation speed, outer ring temperature and vibration acceleration to improve its performance and life, and provide a reference for bearing design.

[0006] The technical solution adopted by the utility model to solve the technical problem is: a multifunctional precision experimental device for angular contact ball bearings, comprising a supporting module, a driving module, a loading module, a heating module and a measuring module;

[0007] The support module comprises a bearing seat, and the bearing seat is used to support the rotor through a bearing;

[0008] The driving module is used to provide power for the rotation of the rotor;

[0009] The loading module is used to provide axial loading to the outer ring of the bearing and radial loading to the bearing seat;

[0010] The heating module is used to heat the bearing;

[0011] The measuring module is used to measure the axis trajectory, friction torque, rotation speed, outer ring temperature and vibration acceleration of the bearing.

[0012] This solution can provide axial and radial loading at the same time, and heat it during loading to provide a high-temperature environment to simulate various working conditions, and can detect the axis trajectory, friction torque, rotation speed, outer ring temperature and vibration acceleration.

[0013] Preferably, the bearing seats include three bearings distributed in a straight line, the three bearing seats are respectively provided with the bearings, an annular lubricating oil path is provided on the side of the bearing seat corresponding to the bearing, and the annular lubricating oil path is provided with a plurality of injection ports corresponding to the bearings. The lubricating oil can be used to cool the bearings and provide lubricating oil to the bearings.

[0014] Preferably, the loading module comprises an axial loading servo electric cylinder and a radial loading servo electric cylinder, the loading head of the axial loading servo electric cylinder axially abuts against the outer ring of the bearing, the bearing seat in the middle is suspended, the bearing seats on both sides are fixed relative to the ground, and the loading head of the radial loading servo electric cylinder radially abuts against the bearing seat in the middle, so as to provide loading force to the bearing from the axial and radial directions.

[0015] Preferably, the heating module comprises an electric heating ring, and the electric heating ring is located in the middle of the bearing seat, so as to provide a high temperature environment for the bearing through the bearing seat.

[0016] Preferably, the measuring module includes a speed torque meter, an eddy current sensor, a temperature sensor and a vibration sensor, so as to measure the axis trajectory, friction torque, speed, outer ring temperature and vibration acceleration of the bearing.

[0017] Preferably, the driving module comprises a driving motor, and the output end of the driving motor is arranged in linkage with the rotor to drive the rotor to rotate.

[0018] Preferably, the output end of the driving motor is connected to the input end of the speed torque meter through a nylon rope coupling, and the output end of the speed torque meter is connected to the rotor through an elastic coupling, so as to facilitate the detection of the speed and friction torque of the rotor.

[0019] Preferably, the two eddy current sensors are distributed at 90 degrees on the side of the bearing seat, and the probes of the eddy current sensors are arranged corresponding to the bearings. The axis trajectory of the rotor is measured.

[0020] Preferably, the two temperature sensors are distributed on the left and right sides of the bearing seats, and the probes of the temperature sensors are respectively arranged corresponding to the outer rings of the bearings, for detecting the temperature of the bearings.

[0021] Preferably, each bearing seat is provided with two acceleration sensors, and the two acceleration sensors of the same bearing seat are distributed at 90 degrees to measure the lateral and longitudinal vibration signals of the bearing seat respectively.

[0022] Beneficial effects of the utility model:

[0023] This solution can provide axial and radial loading at the same time, and heat it during loading to provide a high-temperature environment to simulate various working conditions. It can also detect its axis trajectory, friction torque, speed, outer ring temperature and vibration acceleration to improve its performance and life, and provide a reference for bearing design. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only five of the drawings of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the arrangement of sensors in the utility model;

[0027] Figure 3 This is a schematic diagram of the heating module structure in the utility model;

[0028] Figure 4 This is a schematic diagram of axial loading in the utility model;

[0029] Figure 5 It is a schematic diagram of radial loading in the utility model.

[0030] Among them, 1. drive motor; 2. speed torque meter; 3. bearing seat; 4. radial loading servo electric cylinder; 5. electric heating ring; 6. axial loading servo electric cylinder; 7. eddy current sensor; 8. temperature sensor; 9. acceleration sensor; 10. rotor; 11. annular lubrication oil circuit. DETAILED DESCRIPTION

[0031] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0032] Example

[0033] like Figure 1 As shown, a multifunctional precision experimental device for angular contact ball bearings includes a supporting module, a driving module, a loading module, a heating module and a measuring module; the supporting module includes a bearing seat 3, and the bearing seat 3 is used to support a rotor 10 through a bearing; the driving module is used to provide power for the rotation of the rotor 10; the loading module is used to provide axial loading to the outer ring of the bearing and radial loading to the bearing seat 3; the heating module is used to heat the bearing; the measuring module is used to measure the axis trajectory, friction torque, rotation speed, outer ring temperature and vibration acceleration of the bearing.

[0034] This solution can provide axial and radial loading at the same time, and heat it during loading to provide a high-temperature environment to simulate various working conditions, and can detect the axis trajectory, friction torque, rotation speed, outer ring temperature and vibration acceleration.

[0035] Combination Figure 3 As shown, the bearing seat 3 includes three linearly distributed ones, the three bearing seats 3 are respectively provided with the bearings, the bearing seat 3 is provided with an annular lubricating oil path 11 on the side corresponding to the bearings, and the annular lubricating oil path 11 is provided with a plurality of injection ports corresponding to the bearings. The lubricating oil can be used to cool it, and the oil supply flow is controlled by the frequency converter in the oil station. The frequency converter motor in the oil station can be controlled to study the working performance of the angular contact ball bearing under different oil supply conditions.

[0036] The driving module includes a driving motor 1, and the output end of the driving motor 1 is linked with the rotor 10. It is convenient to drive the rotor 10 to rotate. The driving motor 1 is provided with a water cooler, which dissipates heat from the driving motor 1 to prevent the motor from being damaged by high temperature. The driving motor 1 controls the working speed through a frequency converter, so that the working performance of the angular contact ball bearing at different speeds can be studied.

[0037] Combination Figure 4 and Figure 5 As shown, the loading module includes an axial loading servo electric cylinder 6 and a radial loading servo electric cylinder 4, the loading head of the axial loading servo electric cylinder 6 axially abuts against the outer ring of the bearing, the bearing seat 3 in the middle is suspended, the bearing seats 3 on both sides are fixed relative to the ground, and the loading head of the radial loading servo electric cylinder 4 radially abuts against the bearing seat 3 in the middle, so as to provide loading force to the bearing from the axial and radial directions.

[0038] Each servo electric cylinder is equipped with a different loading head to meet the loading requirements. Each servo electric cylinder is equipped with a stable bracket to ensure the neutrality of the cylinder loading and improve the safety of the experiment. The servo electric cylinder adopts two loading modes, one is stable loading and the other is load spectrum loading. The loading mode is determined by the software selection in the host computer.

[0039] It should be noted that the bearing and the bearing seat 3 are not completely fixed, and there is axial clearance between them to facilitate axial loading.

[0040] The heating module includes an electric heating coil 5, which is located in the middle of the bearing seat 3, so as to provide a high temperature environment for the bearing through the bearing seat 3. The electric heating coil 5 is electrically connected to the temperature control box, and the temperature is controlled by the temperature control box to provide a high temperature environment. The heating temperature of the heating coil is displayed in real time on the temperature control box panel.

[0041] The measuring module includes a speed torque meter 2, an eddy current sensor 7, a temperature sensor 8 and a vibration sensor, so as to measure the axis trajectory, friction torque, speed, outer ring temperature and vibration acceleration of the bearing.

[0042] The output end of the driving motor 1 is connected to the input end of the speed torque meter 2 through a nylon rope coupling, and the output end of the speed torque meter 2 is connected to the rotor through an elastic coupling. It is convenient to detect the speed and friction torque of the rotor 10. The torque speed meter measures the speed and friction torque of the rotor 10, and the signal is converted into a voltage signal through a conversion module and then collected by the acquisition card.

[0043] The two eddy current sensors 7 are distributed at 90 degrees on the bearing seat 3 , and the probes of the eddy current sensors 7 are arranged corresponding to the bearings.

[0044] Combination Figure 2 As shown, two temperature sensors 8 are distributed on the left and right sides of the bearing seat 3, and the probes of the temperature sensor 8 are respectively arranged corresponding to the outer ring of the bearing, so as to detect the temperature of the bearing.

[0045] Each bearing seat 3 is provided with two acceleration sensors 9, and the sides of the two acceleration sensors 9 of the same bearing seat 3 are distributed at 90 degrees. The lateral and longitudinal vibration signals of the bearing seat 3 are measured respectively.

[0046] All sensor signals are collected by the signal acquisition card and processed in the software of the host computer.

[0047] Example 2

[0048] refer to Figure 1 , Figure 2 and Figure 4The multifunctional precision experimental device and method for angular contact ball bearings first sets a constant motor speed through a frequency converter, and then uses the software of the host computer to control the axial servo electric cylinder to apply different axial loads to the outer ring of the bearing. At the same time, the axis trajectory, friction torque, speed, outer ring temperature and vibration acceleration of the bearing during working are obtained through the measurement module to study the working performance of the angular contact ball bearing under different axial loads.

[0049] Example 3

[0050] refer to Figure 1 , Figure 2 and Figure 5 First, a constant motor speed is set, and then the radial loading servo electric cylinder 4 is controlled to apply different radial loads to the outer ring of the bearing. At the same time, the axis trajectory, friction torque, speed, outer ring temperature and vibration acceleration of the bearing during working are obtained through the measurement module to study the working performance of the angular contact ball bearing under different radial loads.

[0051] Example 4

[0052] refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 First, a constant motor speed is set, and then the axial and radial servo electric cylinders are controlled to apply different axial and radial loads to the outer ring of the bearing. At the same time, the axis trajectory, friction torque, speed, outer ring temperature and vibration acceleration of the bearing during working are obtained through the measurement module to study the working performance of the angular contact ball bearing under combined load.

[0053] Example 5

[0054] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 First, a constant motor speed is set, and then the axial loading servo cylinder 6 is controlled to apply a constant axial load to the outer ring of the bearing. Different heating temperatures are set using the temperature control box panel. At the same time, the axis trajectory, friction torque, speed, outer ring temperature and vibration acceleration of the bearing during operation are obtained through the measurement module. The working performance of angular contact ball bearings under different heating temperatures is studied.

[0055] Example 6

[0056] refer to Figure 1 , Figure 2 and Figure 4First, a constant motor speed is set, and then the axial loading servo cylinder 6 is controlled to apply a constant axial load to the outer ring of the bearing. The oil supply frequency is changed by the frequency converter in the oil station. At the same time, the axis trajectory, friction torque, speed, outer ring temperature and vibration acceleration of the bearing during working are obtained through the measurement module. The working performance of angular contact ball bearings under different oil supply frequencies is studied.

[0057] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A multifunctional precision experimental device for angular contact ball bearings, characterized in that: It includes a supporting module, a driving module, a loading module, a heating module and a measuring module; The support module comprises a bearing seat (3), and the bearing seat (3) is used to support the rotor (10) through a bearing; The driving module is used to provide power for the rotation of the rotor (10); The loading module is used to provide axial loading to the outer ring of the bearing and radial loading to the bearing seat (3); The heating module is used to heat the bearing; The measuring module is used to measure the axis trajectory, friction torque, rotation speed, outer ring temperature and vibration acceleration of the bearing.

2. A multifunctional precision experimental device for angular contact ball bearings according to claim 1, characterized in that: The bearing seats (3) include three bearing seats (3) distributed in a straight line, each of the three bearing seats (3) is provided with a bearing, an annular lubricating oil path (11) is provided on the side of the bearing seat (3) corresponding to the bearing, and the annular lubricating oil path (11) is provided with a plurality of injection ports corresponding to the bearing.

3. The multifunctional precision experimental device for angular contact ball bearings according to claim 1 is characterized in that: The loading module comprises an axial loading servo electric cylinder (6) and a radial loading servo electric cylinder (4), wherein the loading head of the axial loading servo electric cylinder (6) axially abuts against the outer ring of the bearing; The bearing seat (3) located in the middle is suspended, the bearing seats (3) located on both sides are fixed relative to the ground, and the loading head of the radial loading servo electric cylinder (4) radially abuts against the bearing seat (3) located in the middle.

4. The multifunctional precision experimental device for angular contact ball bearings according to claim 1 is characterized in that: The heating module comprises an electric heating coil (5), and the electric heating coil (5) is located in the middle of the bearing seat (3).

5. The multifunctional precision experimental device for angular contact ball bearings according to claim 1 is characterized in that: The measuring module comprises a speed torque meter (2), an eddy current sensor (7), a temperature sensor (8) and a vibration sensor.

6. The multifunctional precision experimental device for angular contact ball bearings according to claim 5 is characterized in that: The drive module comprises a drive motor (1), and an output end of the drive motor (1) is arranged in linkage with the rotor (10).

7. The multifunctional precision experimental device for angular contact ball bearings according to claim 6 is characterized in that: The output end of the driving motor (1) is connected to the input end of the speed torque meter (2) through a nylon rope coupling, and the output end of the speed torque meter (2) is connected to the rotor through an elastic coupling.

8. The multifunctional precision experimental device for angular contact ball bearings according to claim 5 is characterized by: The two eddy current sensors (7) are distributed at 90 degrees on the side of the bearing seat (3), and the probes of the eddy current sensors (7) are arranged corresponding to the bearings.

9. The multifunctional precision experimental device for angular contact ball bearings according to claim 5 is characterized by: The two temperature sensors (8) are distributed on the left and right sides of the bearing seat (3), and the probes of the temperature sensors (8) are respectively arranged corresponding to the outer rings of the bearings.

10. The multifunctional precision experimental device for angular contact ball bearings according to claim 5, characterized in that: Each bearing seat (3) is respectively provided with two acceleration sensors (9), and the two acceleration sensors (9) of the same bearing seat (3) are distributed at 90 degrees.

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