Radial sliding bearing dynamic characteristic testing device based on non-contact electromagnetic vibration exciters

Abstract

The invention discloses a radial sliding bearing dynamic characteristic testing device based on non-contact electromagnetic vibration exciters, which is characterized in that four sets of electromagnetic vibration exciters which are orthogonally distributed along the circumferential direction of a rotor are respectively arranged at two ends of the rotor, the electromagnetic vibration exciters are in clearance fit with the rotor, and a clearance is also formed between the adjacent electromagnetic vibration exciters; a force sensor is arranged between each set of electromagnetic vibration exciter and a stator support; the positions, which are close to the electromagnetic vibration exciters, of the two ends of the rotor are each provided with at least two orthogonally-distributed displacement sensors, controllable and non-contact electromagnetic excitation force or electromagnetic torque is applied to the rotor through the electromagnetic vibration exciters, the radial displacement of the rotor under the action of radial electromagnetic force or electromagnetic torque is detected through the displacement sensors, and the controllable non-contact excitation and dynamic characteristic test of the radial sliding bearing is realized. The device can realize controllable non-contact excitation and vibration response detection of the radial sliding bearing, and can be used for measuring the dynamic characteristic coefficient of the radial sliding bearing.

Description

technical field

[0001] The invention relates to the technical field of sliding bearing performance testing, in particular to a dynamic characteristic testing device for radial sliding bearings based on a non-contact electromagnetic exciter. Background technique

[0002] As an important basic component in rotating machinery, sliding bearings have the characteristics of high operating speed, strong load capacity, and small vibration and impact. They occupy an irreplaceable position in applications requiring high speed, heavy load, and high precision. The dynamic characteristics of sliding bearings are a key indicator of sliding bearing performance, which not only reflects the load-carrying characteristics of the lubricating oil film, but also has an important impact on the dynamic behavior of the entire rotor system supported by the bearing. Sliding bearings that bear radial loads are called radial sliding bearings. At present, four radial stiffness coefficients and four radia...

Examples

test example 1

[0024] Test Case 1—Static Loading Test of Radial Rigidity of Radial Sliding Bearing Oil Film

[0025] Utilize the frequency converter to drive the motor to make the rotor 15 work under different speed conditions (such as 300 / 600 / 900 / 1200 / 1500r / min), use the left hydraulic loading device 4 and the right hydraulic loading device 14 to control the left diameter Apply static loads of the same magnitude (such as 10000 / 12500 / 15000 / 17500 / 20000N) to the outer ring of rolling bearing 3 and the outer ring of right radial rolling bearing 13 .

[0026] According to the basic idea of ​​the perturbation method, the left electromagnetic exciter assembly 5 and the right electromagnetic exciter assembly 12 of the test bearing 9 are used to apply a non-contact radial electromagnetic force ( Such as 300 / 500 / 800N), under different rotating speeds and different radial load conditions of the rotor 15, measure the relationship between the output of each displacement sensor and the electromagnetic ex...

test example 2

[0027] Test case 2——Dynamic excitation test of radial stiffness and radial damping of radial sliding bearing oil film

[0028] Utilize the frequency converter to drive the motor to make the rotor 15 work under different speed conditions (such as 600 / 900 / 1200 / 1500r / min), and use the left hydraulic loading device 4 and the right hydraulic loading device 14 to control the left radial rolling bearing respectively 3 The outer ring and the right radial rolling bearing 13 apply the same static load (such as 10000 / 12500 / 15000 / 17500 / 20000N) to the outer ring.

[0029] Utilize the electromagnetic exciter assembly 5 on the left side of the test bearing 9 and the electromagnetic exciter assembly 12 on the right side to apply a certain amplitude (such as 1500N or 2000N) and a certain frequency (such as 8 / 17 / 29Hz) to the rotor 15. With the same frequency sinusoidal excitation force, under the working conditions of different rotational speeds and different radial loads of the rotor 15, the o...

technical field

[0001] The invention relates to the technical field of sliding bearing performance testing, in particular to a dynamic characteristic testing device for radial sliding bearings based on a non-contact electromagnetic exciter. Background technique

[0002] As an important basic component in rotating machinery, sliding bearings have the characteristics of high operating speed, strong load capacity, and small vibration and impact. They occupy an irreplaceable position in applications requiring high speed, heavy load, and high precision. The dynamic characteristics of sliding bearings are a key indicator of sliding bearing performance, which not only reflects the load-carrying characteristics of the lubricating oil film, but also has an important impact on the dynamic behavior of the entire rotor system supported by the bearing. Sliding bearings that bear radial loads are called radial sliding bearings. At present, four radial stiffness coefficients and four radia...

Examples

test example 1

[0024] Test Case 1—Static Loading Test of Radial Rigidity of Radial Sliding Bearing Oil Film

[0025] Utilize the frequency converter to drive the motor to make the rotor 15 work under different speed conditions (such as 300 / 600 / 900 / 1200 / 1500r / min), use the left hydraulic loading device 4 and the right hydraulic loading device 14 to control the left diameter Apply static loads of the same magnitude (such as 10000 / 12500 / 15000 / 17500 / 20000N) to the outer ring of rolling bearing 3 and the outer ring of right radial rolling bearing 13 .

[0026] According to the basic idea of ​​the perturbation method, the left electromagnetic exciter assembly 5 and the right electromagnetic exciter assembly 12 of the test bearing 9 are used to apply a non-contact radial electromagnetic force ( Such as 300 / 500 / 800N), under different rotating speeds and different radial load conditions of the rotor 15, measure the relationship between the output of each displacement sensor and the electromagnetic ex...

test example 2

[0027] Test case 2——Dynamic excitation test of radial stiffness and radial damping of radial sliding bearing oil film

[0028] Utilize the frequency converter to drive the motor to make the rotor 15 work under different speed conditions (such as 600 / 900 / 1200 / 1500r / min), and use the left hydraulic loading device 4 and the right hydraulic loading device 14 to control the left radial rolling bearing respectively 3 The outer ring and the right radial rolling bearing 13 apply the same static load (such as 10000 / 12500 / 15000 / 17500 / 20000N) to the outer ring.

[0029] Utilize the electromagnetic exciter assembly 5 on the left side of the test bearing 9 and the electromagnetic exciter assembly 12 on the right side to apply a certain amplitude (such as 1500N or 2000N) and a certain frequency (such as 8 / 17 / 29Hz) to the rotor 15. With the same frequency sinusoidal excitation force, under the working conditions of different rotational speeds and different radial loads of the rotor 15, the o...

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