CN213148309U

CN213148309U - Sliding bearing vibration measurement structure for high-power high-speed motor

Info

Publication number: CN213148309U
Application number: CN202022332754.0U
Authority: CN
Inventors: 文欢; 符建标; 张锐; 黄燕红; 陈林
Original assignee: SHENKE SLIDE BEARING Inc
Current assignee: SHENKE SLIDE BEARING Inc
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-05-07
Anticipated expiration: 2030-10-19

Abstract

The utility model discloses a slide bearing vibration measurement structure for high-power high-speed motor, including the bearing frame, be equipped with the axle bush in the bearing frame, the axle bush endotheca is equipped with the pivot, is equipped with the monitoring mechanism who is used for monitoring the pivot vibration between pivot and the axle bush, and the monitoring mechanism includes the vibration sensor who is used for monitoring pivot and axle bush vibration condition and the piezoelectric film who is used for monitoring the inside operating mode of axle bush, and vibration sensor locates on the bearing frame, and piezoelectric film locates on the medial extremity face of axle bush, the utility model discloses piezoelectric film both can monitor the running condition of pivot, also can monitor the operating condition in the axle bush; the monitoring data of the piezoelectric film and the vibration sensor are combined, the source of fault vibration is analyzed, and effective maintenance and overhaul are conveniently carried out on the high-power high-speed motor and the sliding bearing of the high-power high-speed motor.

Description

Sliding bearing vibration measurement structure for high-power high-speed motor

Technical Field

The utility model relates to a slide bearing technical field specifically is a slide bearing vibration measurement structure for high-power high-speed motor.

Background

Sliding bearings are widely used in machines such as motors, turbines, and compressors as one of important support members in rotary machines, but these machines are often stopped due to vibration problems. The vibration overproof is one of the most common unqualified items encountered in a high-speed motor test, the high-speed motor is usually stopped due to abnormal vibration, but the vibration of the high-speed motor is caused by a plurality of factors, generally including the motor (such as the structural problem or the assembly problem of a rotor and a stator) and a sliding bearing (such as the rigidity of the bearing or the coaxiality of an upper half bearing bush and a lower half bearing bush is not good, the bearing bush is installed loosely and even the bearing seat is installed insecurely).

For improving the vibration monitoring effect of slide bearing for high-power high-speed motor, the utility model provides a slide bearing vibration measurement structure for high-power high-speed motor, its simple structure, cost and processing requirement are lower relatively, can further perfect the monitoring of high-power high-speed motor and slide bearing vibration, are favorable to launching effectual maintenance and maintenance when the motor breaks down.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sliding bearing vibration measuring structure for a high-power high-speed motor, the piezoelectric film of the utility model can monitor the running condition of the rotating shaft and the working condition in the bearing bush; the monitoring data of the piezoelectric film and the vibration sensor are combined, the source of fault vibration is analyzed, and effective maintenance and overhaul are conveniently carried out on the high-power high-speed motor and the sliding bearing of the high-power high-speed motor.

In order to achieve the purpose of the invention, the utility model adopts the following technical scheme:

the utility model provides a high-power high-speed motor is with slide bearing vibration measurement structure, includes the bearing frame, is equipped with the axle bush in the bearing frame, and the axle bush endotheca is equipped with the pivot, is equipped with the monitoring mechanism who is used for monitoring the pivot vibration between pivot and the axle bush, and monitoring mechanism is including the piezoelectric film who is used for monitoring the vibration sensor of pivot and the axle bush vibration condition and is used for monitoring the inside operating mode of axle bush, and on the bearing frame was located to vibration sensor, piezoelectric film located on the medial extremity face of.

The inner side surface of the bearing bush is provided with a T-shaped groove, the T-shaped groove comprises a first groove, a second groove is arranged in the first groove, the first groove and the second groove are coaxially arranged, and the inner diameter of the first groove is larger than that of the second groove.

Be equipped with the spring in the second recess, piezoelectric film is located first recess, the one end and the second recess terminal surface butt of spring, the other end and one side butt of piezoelectric film of spring, hexagon socket head cap screw is located at the piezoelectric film center, on piezoelectric film slidable ground was equipped with hexagon socket head cap screw, hexagon socket head cap screw passed the spring and was connected with the axle bush.

The bearing block comprises a bearing end cover and a bearing block cover, the bearing block cover is arranged on the inner side of the bearing end cover, a flange plate is arranged on the outer side of the bearing block cover, the bearing block cover is fixedly connected with the bearing end cover through the flange plate, and the left side of the bearing block cover is connected with the bearing bush through a long bolt.

The vibration sensor comprises a first vibration sensor and a second vibration sensor, the first vibration sensor is positioned between the flange plate and the bearing end cover, and the second vibration sensor is positioned between the bearing bush and the bearing seat cover.

The piezoelectric film is composed of an upper half part and a lower half part, and comprises an upper film of the upper half part and a lower film of the lower half part.

Compared with the prior art, the sliding bearing vibration measuring structure for the high-power high-speed motor adopting the technical scheme has the following beneficial effects:

one, adopt the utility model discloses a slide bearing vibration measurement structure for high-power high-speed motor, piezoelectric film both can monitor the operation condition of pivot, also can monitor the behavior in the axle bush.

And secondly, the source of fault vibration is analyzed by combining the monitoring data of the piezoelectric film and the vibration sensor, so that the high-power high-speed motor and the sliding bearing thereof can be effectively maintained and overhauled.

Drawings

FIG. 1 is a schematic structural diagram of a sliding bearing vibration measuring structure for a high-power high-speed motor;

FIG. 2 is an enlarged view at Z in FIG. 1;

FIG. 3 is a schematic view of a piezoelectric film;

FIG. 4 is a schematic diagram of oil film pressure distribution;

FIG. 5 is a schematic diagram of the output signal of the piezoelectric film during normal operation of the bearing;

FIG. 6 is a schematic diagram of the output signal of the piezoelectric film when the shaft is impacted with the bearing bush;

fig. 7 is a schematic diagram of the output signal of the piezoelectric film when a fault occurs inside the bearing bush.

Reference numerals: 1. bearing bushes; 2. a rotating shaft; 3. a monitoring mechanism; 31. a first vibration sensor; 32. a second vibration sensor; 33. a piezoelectric film; 331. coating a film; 332. a lower film; 4. a spring; 5. a hexagon socket head cap screw; 6. a bearing end cap; 7. a bearing housing cover; 71. a flange plate.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 to 7, a vibration measurement structure for a sliding bearing for a high-power high-speed motor includes a bearing seat, a bearing bush 1 is arranged in the bearing seat, a rotating shaft 2 is sleeved in the bearing bush 1, the bearing bush 1 is fixedly connected with the bearing seat, the rotating shaft 2 rotates in the bearing bush 1, vibration is generated in the rotating process, a monitoring mechanism 3 for monitoring vibration of the rotating shaft 2 is arranged between the rotating shaft 2 and the bearing bush 1, the monitoring mechanism 3 includes a vibration sensor for monitoring vibration conditions of the rotating shaft 2 and the bearing bush 1 and a piezoelectric film 33 for monitoring internal working conditions of the bearing bush 1, the vibration sensor is arranged on the bearing seat, the piezoelectric film 33 is arranged on an inner side end surface of the bearing bush 1, and the piezoelectric film 33 can monitor operation conditions of the rotating shaft; the source of fault vibration is analyzed by combining the monitoring data of the piezoelectric film 33 and the vibration sensor, and the high-power high-speed motor and the sliding bearing thereof are conveniently and effectively maintained and overhauled.

The inner side surface of the bearing bush 1 is provided with a T-shaped groove, the T-shaped groove comprises a first groove, a second groove is arranged in the first groove, the first groove and the second groove are coaxially arranged, the inner diameter of the first groove is larger than that of the second groove, a spring 4 is arranged in the second groove, a piezoelectric film 33 is positioned in the first groove, a gap is arranged between the inner side of the piezoelectric film 33 and the end surface of the first groove, one end of the spring 4 is abutted against the end surface of the second groove, the other end of the spring 4 is abutted against one side of the piezoelectric film 33, the center of the piezoelectric film 33 is arranged on the hexagon socket head cap screw 5, the piezoelectric film 33 is slidably arranged on the hexagon socket head screw 5, the hexagon socket head screw 5 penetrates through the spring 4 to be connected with the bearing bush 1, the spring 4 extrudes the piezoelectric film 33 outwards in,

2 covers of pivot are established in axle bush 1, and the ladder face of pivot 2 is located axle bush 1 one side, and monitoring mechanism 3 locates between pivot 2 and the axle bush 1, and when 2 rotatory vibration amplitude of pivot were big, the ladder terminal surface of pivot 2 acted on the medial surface that can axle bush 1, acted on and piezoelectric film 33 simultaneously, and piezoelectric film 33 pressurized produces the signal.

The bearing frame includes bearing cap 6 and bearing cap 7, bearing cap 7 is located bearing cap 6 inboard, the bearing cap 7 outside is equipped with ring flange 71, bearing cap 7 passes through ring flange 71 and bearing cap 6 fastening connection, the left side of bearing cap 7 is passed through the long bolt and is connected with axle bush 1, bearing cap 6 one side is equipped with the fixed plate and constructs fixed connection with other, vibration sensor includes first vibration sensor 31 and second vibration sensor 32, first vibration sensor 31 is located between ring flange 71 and the bearing cap 6, first vibration sensor 31 is used for monitoring the vibration between bearing cap 7 and the bearing cap 6 unusual, second vibration sensor 32 is located between axle bush 1 and the bearing cap 7, second vibration sensor 32 is used for monitoring the vibration between axle bush 1 and the bearing cap 7 unusual.

The piezoelectric film 33 is composed of an upper half and a lower half, the piezoelectric film 33 includes an upper film 331 of the upper half and a lower film 332 of the lower half, after the piezoelectric film 33 is acted, an electric signal generated by a pressure difference between the upper film 331 and the lower film 332 is used for monitoring a working condition inside the bearing bush 1, an oil film is pinched by the piezoelectric film 33, and fig. 4 is a schematic diagram of oil film pressure distribution.

The source of fault vibration is analyzed by combining the signal output by the piezoelectric film 33 and the vibration monitoring data of the vibration sensor, so that the high-power high-speed motor and the sliding bearing thereof can be effectively maintained and overhauled.

When the sliding bearing normally works, the vibration amplitude of the rotating shaft 2 is normal, and the relative voltage waveform can be output in corresponding time under the action of oil film pressure, such as the waveform of a region a shown in fig. 5; when the rotating shaft 2 is not balanced in vibration, the rotating shaft 2 will act on a certain area in the bearing bush 1, so that the upper film 331 and the lower film 332 of the piezoelectric film 33 are stressed unevenly, and the output waveform has a more obvious sudden change, as shown in an area b of fig. 6; when a fault occurs inside the bearing bush 1, the amplitude of the waveform output by the piezoelectric film 33 is relatively moderate, as shown in the region c of the schematic diagram 7; in addition, the rotating shaft 2 can be contacted with the piezoelectric film 33 due to the viscous action of the oil, and if the output signal of the piezoelectric film 33 is abnormal, the machine is stopped for checking to prevent the bearing bush 1 from being abraded and damaged.

The use process comprises the following steps:

1. when the sliding bearing normally works, the vibration amplitude of the rotating shaft 2 is normal, and the relative voltage waveform can be output in corresponding time under the action of oil film pressure, such as the waveform of a region a shown in fig. 5.

2. When the vibration of the rotating shaft 2 is unbalanced, the rotating shaft 2 has a large rotating vibration amplitude, and the rotating shaft 2 acts on a certain region in the bearing bush 1, so that the upper film 331 and the lower film 332 of the piezoelectric film 33 are stressed unevenly, and the output waveform signal has a relatively obvious sudden change, as shown in a region b of fig. 6.

3. When a fault occurs inside the bearing bush 1, the amplitude of the waveform output by the piezoelectric film 33 is relatively gentle, as shown in the region c of the diagram 7.

4. The first vibration sensor 31 is used for monitoring the abnormal vibration between the bearing seat cover 7 and the bearing end cover 6, the second vibration sensor 32 is used for monitoring the abnormal vibration between the bearing bush 1 and the bearing seat cover 7, and the source of fault vibration is analyzed by combining the signal output by the piezoelectric film 33 and the vibration monitoring data of the vibration sensor, so that the high-power high-speed motor and the sliding bearing thereof are effectively maintained and overhauled.

5. The rotating shaft 2 can contact the piezoelectric film 33 due to the viscous action of the oil, and if the output signal of the piezoelectric film 33 is abnormal, the machine is stopped for checking to prevent the bearing bush 1 from being abraded and damaged.

The above description is a preferred embodiment of the present invention, and a person skilled in the art can make several modifications and improvements without departing from the principles of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a slide bearing vibration measuring structure for high-power high-speed motor, a serial communication port, including the bearing frame, be equipped with axle bush (1) in the bearing frame, axle bush (1) endotheca is equipped with pivot (2), be equipped with between pivot (2) and axle bush (1) and be used for monitoring mechanism (3) of pivot (2) vibration, monitoring mechanism (3) are including being used for monitoring pivot (2) and axle bush (1) vibration condition's vibration sensor and being used for monitoring piezoelectric film (33) of axle bush (1) internal work condition, vibration sensor locates on the bearing frame, piezoelectric film (33) are located on the medial extremity face of axle bush (1).

2. The vibration measuring structure of the sliding bearing for the high-power high-speed motor according to claim 1, wherein the inner side surface of the bearing bush (1) is provided with a T-shaped groove, the T-shaped groove comprises a first groove, a second groove is arranged in the first groove, the first groove and the second groove are coaxially arranged, and the inner diameter of the first groove is larger than that of the second groove.

3. The vibration measuring structure of the sliding bearing for the high-power high-speed motor according to claim 2, wherein a spring (4) is arranged in the second groove, the piezoelectric film (33) is positioned in the first groove, one end of the spring (4) is abutted against the end surface of the second groove, the other end of the spring (4) is abutted against one side of the piezoelectric film (33), the center of the piezoelectric film (33) is arranged on the hexagon socket head cap screw (5), the piezoelectric film (33) is slidably arranged on the hexagon socket head cap screw (5), and the hexagon socket head cap screw (5) penetrates through the spring (4) to be connected with the bearing bush (1).

4. The sliding bearing vibration measuring structure for the high-power high-speed motor according to claim 1, wherein the bearing seat comprises a bearing end cover (6) and a bearing seat cover (7), the bearing seat cover (7) is positioned at the inner side of the bearing end cover (6), a flange (71) is arranged at the outer side of the bearing seat cover (7), the bearing seat cover (7) is fixedly connected with the bearing end cover (6) through the flange (71), and the left side of the bearing seat cover (7) is connected with the bearing bush (1) through a long bolt.

5. The vibration measuring structure of the sliding bearing for the high-power high-speed motor is characterized in that the vibration sensor comprises a first vibration sensor (31) and a second vibration sensor (32), the first vibration sensor (31) is positioned between the flange plate (71) and the bearing end cover (6), and the second vibration sensor (32) is positioned between the bearing bush (1) and the bearing seat cover (7).

6. The vibration measuring structure of a sliding bearing for a high power high speed motor according to any one of claims 1 to 5, wherein the piezoelectric film (33) is composed of upper and lower halves, and the piezoelectric film (33) includes an upper film (331) of the upper half and a lower film (332) of the lower half.