RU2820766C1 - Bearing unit testing device - Google Patents

Abstract

FIELD: testing.

SUBSTANCE: invention relates to testing of equipment, in particular to testing of bearing supports. Device comprises a frame, an electric motor, a shaft line, a loading device, auxiliary bearing supports. Frame is installed on the base, has a support in the centre for fastening the tested module, along the frame edges there are two machine lines containing an electric motor, a multiplier, a shaft line. Multiplier is used as a support for the shaft line connecting the engine and the tested module. Device also has current collectors intended for connection of electronic diagnostic equipment and installed in the machine line between the multiplier and the shaft line. Tested module is installed between machine lines and consists of two rotors installed coaxially relative to each other. Each rotor contains a loading device allowing to reproduce axial and radial load on each tested bearing support.

EFFECT: possibility of simultaneous testing of bearing supports with creation of the required axial and/or radial load individually for each bearing support depending on the type of rolling bearing contained in it.

1 cl, 1 dwg

Description

The invention relates to the field of testing technology, in particular to testing bearing supports containing inter-rotor, angular contact, radial and thrust bearings under static radial and or axial loading.

State of the art in the field of the claimed invention.

A testing installation is known (RF utility model patent No. 49256, IPC G01M 13/04 (2000.01), filing date 04/26/2005, publication date 11/10/2005) containing a loading device, a current collector.

The closest to the declared object of the invention for the same purpose and common in technical essence, the achieved result and the totality of features is a stand for testing a shaft line containing a frame, an electric motor, a shaft line, auxiliary bearings (see the description of the RF patent No. 2582527, IPC B61B 3/00 , B61B13/00, B65G63/02, accepted as prototype).

The disadvantage of the described devices is the inability to simultaneously test bearing supports for different purposes with the creation of the necessary load on all tested bearing supports, which significantly increases the test time.

The technical result to which the claimed invention is aimed is the creation of a device for testing bearing supports, which allows simultaneous testing of bearing supports with the creation of the necessary axial and or radial load individually for each bearing support, depending on the type of rolling bearing it contains.

This technical result is achieved by the fact that the device for testing bearing supports contains a frame, an electric motor, a shaft line, a loading device, and auxiliary bearing supports.

What is new in the invention is that the frame, installed on the base, contains a support in the center for fastening the module under test; two machine lines are installed at the edges of the frame, containing an electric motor, a multiplier, and a shaft line, while the multiplier is used as a support for the shaft line connecting the engine and the module under test, the device also contains current collectors intended for connecting electronic diagnostic equipment and installed in the machine line between the multiplier and the shaft line, the module under test is installed between the machine lines and consists of two rotors coaxially installed relative to each other, each rotor contains a loading device that allows you to reproduce the axial and the radial load on each bearing unit tested.

The figure shows a device for testing bearing supports.

Positions in the figures are designated:

1 - device for testing bearing units;

2 - bearing units;

3 - base;

4 - frame;

5 - electric motor;

6 - shafting;

7 - loading device;

8 - module under test;

9 - rotor;

10 - multiplier;

11 - current collector.

Device 1 for testing bearing units 2 contains a base 3, a frame 4, an electric motor 5, a shaft line 6, and a loading device 7.

Test module 8 contains a rotor 9 with a loading device 7, which makes it possible to reproduce an axial or radial or axial and radial load simultaneously on each bearing unit 2 of the tested module 8.

The tested module 8 is installed on a frame 4, which is rigidly attached to a base 3.

Multipliers 10 are installed on both sides of frame 4.

The electric motor 5 is installed on the base 3 and is connected to the multiplier 10 via a shaft line 6 with the axis of rotation parallel to the rotor 9.

Each bearing assembly 2 under study contains a thermocouple (not shown) or a strain gauge (not shown) or a thermocouple and a strain gauge simultaneously with the ability to transmit a signal with the corresponding information to electronic diagnostic equipment (not shown) directly or through a current collector 11 mounted on the multiplier 10 coaxially with the axis rotor rotation 9.

The device works as follows.

The bearing units 2 under study with loading devices 7 are installed on the rotor 9. Depending on the required type of research, a thermocouple (not shown) and a strain gauge (not shown) or a thermocouple or strain gauge separately are installed in the bearing unit 2.

Then the assembled test module 8 is installed on the frame 4 of the device 1.

Connect the elements of the tested module 8 with the elements of device 1.

When the electric motor 4 is operating, the rotor 9 is rotated through the shaft line 6 and the multiplier 10.

The loading device 7 is turned on, and the bearing units 2 are tested under the expected operating conditions.

Thermocouples and the load cell of the bearing units 2 transmit a signal containing information about the temperature of the bearing units and the deformation of the metal of the bearing units to electronic diagnostic equipment.

In the case of measurements outside the rotating part of the bearing assembly, the signal goes directly to electronic diagnostic equipment. In the case of measurements in the rotating part of the bearing assembly, the signal is sent to electronic diagnostic equipment through a current collector.

Example of device implementation.

Device 1 is assembled as follows. A frame 4 is mounted on the base 3, on which the module under test 8 is installed. Multipliers 10 are connected to the rotors 9 of the module under test, and current collectors 11 are connected coaxially to the axes of the rotors. Since the multipliers are misaligned, electric motors 5 are connected to the other axes of the multipliers 10 through shaft lines 6. Module 8 is connected to all necessary communications: oil supply, oil drainage, ensuring the operation of loading devices 7, connecting strain gauges or thermocouples to bearing units 2, including through current collectors, depending on the purpose of the tests. Next, the necessary tests are carried out, the result of which is readings of the temperature of the bearing rings, stress from the action of loads from strain gauges installed on the bearing rings. The module under study also allows testing radial bearings with simultaneous rotation of the rings.

Life tests were carried out with a complete structural simulation of the supports of a two-shaft engine with an inter-rotor bearing with equivalent loads on the bearings, i.e. To reduce testing time, the bearings were loaded with greater force. Force control was recorded by strain gauges mounted on angular contact bearings. Oil was supplied to the bearings at a temperature of ~ 90°C. Oil consumption on the supports, depending on the configuration of the supports, varied from 2 l/min to 12 l/min. The temperatures of the bearings, depending on the configuration of the supports, ranged from 120°C to 150°C, including the temperatures of both rings of the interrotor bearing of 120°C and 130°C, which eliminates the removal of radial clearance in the bearing and its destruction.

The use of the proposed technical solution allows simultaneous testing of bearing supports with the creation of the necessary axial and or radial load individually for each bearing support, depending on the type of rolling bearing it contains, which significantly reduces the test time.

Claims (1)

A device for testing bearing units, containing a base, a frame, an electric motor, a shaft line, a loading device, characterized in that the module under test contains a rotor with a loading device that makes it possible to reproduce an axial, or radial, or axial and radial load simultaneously on each bearing unit of the module under test, in this case, the module under test is installed on a frame that is rigidly attached to the base, multipliers are installed on both sides of the frame, the electric motor is installed on the base and is connected to the multiplier via a shaft line with the axis of rotation parallel to the rotor, each bearing assembly under study contains a thermocouple, or a strain gauge, or a thermocouple and a strain gauge simultaneously with the ability to transmit a signal with relevant information to electronic diagnostic equipment directly or through a current collector installed on the multiplier coaxially with the axis of rotation of the rotor.