CN111207916B - Blade inclination angle adjustable rubs device - Google Patents
Blade inclination angle adjustable rubs device Download PDFInfo
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- CN111207916B CN111207916B CN202010022414.XA CN202010022414A CN111207916B CN 111207916 B CN111207916 B CN 111207916B CN 202010022414 A CN202010022414 A CN 202010022414A CN 111207916 B CN111207916 B CN 111207916B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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Abstract
The invention discloses a rubbing device with an adjustable blade inclination angle. The motor, the rotor blade system, the stator, the bearing and the bearing support are arranged on the base; the motor is connected with a rotor blade system, and the rotor blade system is arranged on the base through a bearing and a bearing support. The adjusting structure is simple, and can adjust the angle alpha between the width direction of the blade and the axial direction of the shaft and adjust the angle beta between the length direction of the adjacent blades.
Description
Technical Field
The invention relates to the technical field of rotating machinery fault simulation, in particular to a rubbing device with an adjustable blade inclination angle.
Background
Rub-impact is the phenomenon of rotor-stator contact that occurs when rotor vibration exceeds the allowable clearance between the rotor and stator. Modern rotating machinery, the operating speed is constantly improved, pushes away the weight ratio and constantly increases for clearance between the rotor and the stator constantly reduces, has increased the probability of bumping between the rotor and the stator and rubbing. The rotary machine has friction failure, which can cause violent vibration of the machine set, affect the service life and even cause damage to the machine and death of people in serious cases. The collision and friction between the blades and the casing cause the blades to be easily bent due to high tangential speed of the blades and the like, so that the blades are damaged.
In the existing rubbing device with the blades, the angle between the width direction of the blades and the axial direction of a test bed and the relative angle between the blades are fixed, so that the influence of the change of the inclination angle of the blades on the system response cannot be researched.
Disclosure of Invention
The technical problem is as follows: aiming at the problems that in the prior art, the angle between the width direction of each blade and the axial direction of a test bed and the relative angle between the blades are fixed values, and the influence of the change of the blade inclination angle on the system response cannot be researched, the invention provides the rubbing device with the adjustable blade inclination angle, which can adjust the angle alpha between the width direction of each blade and the axial direction of the test bed and the angle beta between the width direction of each adjacent blade and the length direction of the test bed.
The technical scheme is as follows: in order to achieve the aim, the invention discloses a rubbing device with an adjustable blade inclination angle, which comprises a base, a motor, a rotor blade system, a stator, a bearing and a bearing support; the stator comprises a stator support and a friction piece, the bearing support comprises a first rolling bearing support and a second rolling bearing support, the first rolling bearing support, the second rolling bearing support, the motor and the stator support are coaxially arranged on the base, the rotor blade system comprises a coupler, a shaft, a wheel disc and blades, one end of the shaft is connected with the motor through the coupler, the other end of the shaft penetrates through a first rolling bearing on the first rolling bearing support and a second rolling bearing on the second rolling bearing support, and the wheel disc provided with the blades is arranged on the shaft; the friction piece is arranged on the stator support, the friction piece can be in contact with the blades when the rotary disc rotates, the angle between the width direction of each blade and the axial direction of the shaft is alpha, and the angle between the length direction of each adjacent blade is beta.
The blades are uniformly distributed on the wheel disc, a plurality of threaded through holes are uniformly distributed on the wheel disc by taking the center of the wheel disc as the center, and counterweight screws are installed at the positions as required to simulate unbalanced excitation.
The rubbing piece comprises a rubbing piece fixing rod and a simulation casing, and the simulation casing is arranged at the bottom of the rubbing piece fixing rod.
The blade comprises a first blade part and a second blade part which are connected through screws, and the contact surface is an inclined surface.
When the angle α between the width direction of the blade and the axial direction of the shaft is adjusted, the relative positions of the first blade portion and the second blade portion are kept fixed, the fixing device between the disk and the blade is unscrewed, and the blade angle is rotated as necessary, and then the fixing device between the disk and the blade is tightened.
When the angle β between the adjacent blades is adjusted, the fixing device between the disk and the blades is unscrewed, the relative position between the disk and the first blade portion is kept fixed, and after the angle of the second blade portion is rotated as necessary, the first blade portion and the second blade portion are brought into contact with each other on the oblique contact surface, and the fixing device between the disk and the blades is tightened.
The first rolling bearing and the second rolling bearing are sliding bearings or rolling bearings, the number of screws between the wheel disc and the blades is set according to needs, and the number of the friction pieces can be set according to needs.
Has the advantages that: compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
(1) the invention can adjust the angle alpha between the width direction of the blade and the axial direction of the test bed and the angle beta between the length direction of the adjacent blade, and the adjusting process is convenient;
(2) according to the invention, the blades are connected with the wheel disc through the screws, so that the blades are convenient to replace;
(3) the number of the rubbing pieces can be set according to the requirement so as to research different rubbing modes of single-point local rubbing, multipoint local rubbing, whole circumference rubbing and the like of the blade;
(4) according to the invention, a balance weight screw can be added on the wheel disc to simulate unbalance and rubbing coupling faults;
(5) the invention has the advantages of convenient use, strong universality and convenient market popularization.
Drawings
FIG. 1 is a general assembly view of a rub-impact device with adjustable blade inclination angle according to the present invention.
FIG. 2 is a disk-blade assembly view.
Fig. 3 is a view showing the construction of the wheel disc.
FIG. 4 is a blade assembly view.
Fig. 5 is a first blade structure view.
Fig. 6 is a front view of the first blade.
Fig. 7 is a second blade section structure view.
Fig. 8 is a front view of the second blade section.
FIG. 9 is a view showing the structure of the rubbing member.
In the figure, 1, a base, 2, a motor, 3, a rotor blade system, 3-1, a coupler, 3-2, a shaft, 3-3, a wheel disc, 3-4, a blade, 3-4-1, a first blade part, 3-4-2, a second blade part, 4, a stator, 4-1, a stator support, 4-2, a rubbing part, 4-2-1, a rubbing fixing rod, 4-2-2, a simulation casing, 5-1, a first rolling bearing, 5-2, a second rolling bearing, 6-1, a first rolling bearing support and 6-2, a second rolling bearing support.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
As shown in FIG. 1, the invention relates to a rubbing device with adjustable blade inclination angle, which comprises a base 1, a motor 2, a rotor blade system, a stator 4, a bearing and a bearing support 6. The stator comprises a stator support 4-1 and a friction piece 4-2, the bearing support 6 comprises a first rolling bearing support 6-1 and a second rolling bearing support 6-2, and the first rolling bearing support 6-1, the second rolling bearing support 6-2, the motor 2 and the stator support 4-1 are coaxially arranged on the base 1, the rotor blade system comprises a coupler 3-1, a shaft 3-2, a wheel disc 3-3 and blades 3-4, one end of the shaft 3-2 is connected with a motor through the coupler 3-1, the other end of the shaft 3-2 penetrates through a first rolling bearing 5-1 on a first rolling bearing support 6-1 and a second rolling bearing 5-2 on a second rolling bearing support 6-2, and the wheel disc 3-3 provided with blades 3-4 is arranged on the shaft 3-2; the rubbing piece 4-2 is arranged on the stator support 4-1, the rubbing piece 4-2 can touch the blades 3-4, the angle between the width direction of each blade 3-4 and the axial direction of the shaft 3-2 is alpha, and the angle between the length direction of the adjacent blade 3-4 is beta. And the wheel disc 3-3 can be arranged on the shaft 3-2 through a set screw, the blades 3-4 are connected with the wheel disc 3-3 through screws, the wheel disc 3-3 can be positioned under the rubbing piece 4-2 or not, and the blades 3-4 on the wheel disc can be in contact with the rubbing piece 4-2 when the wheel disc 3-3 rotates.
As shown in fig. 1 to 3, 2 blades 3-3 are symmetrically distributed on the disk 3-3, 16M 5 screw through holes are uniformly distributed on the disk 3-3 centering on the center of the disk 3-3, and a balance weight screw is installed at the position as required to simulate unbalanced excitation.
As shown in fig. 1 and 4 to 8, the blade 3-4 includes a first blade portion 3-4-1 and a second blade portion 3-4-2, which are connected by a screw, and the contact surface is a slope.
As shown in fig. 1 and 9, the stator 4 includes a stator holder 4-1 and a rubbing piece 4-2, which are coupled by a screw. The rubbing piece 4-2 comprises a rubbing piece fixing rod 4-2-1 and a simulation case 4-2-2.
When the angle alpha between the width direction of the blade 3-4 and the axial direction of the test bed is adjusted, the relative positions of the first blade part 3-4-1 and the second blade part 3-4-2 are kept fixed, the screw between the wheel disc 3-3 and the blade 3-4 is unscrewed, and the screw between the wheel disc 3-3 and the blade 3-4 is screwed after the blade 3-4 is rotated according to the requirement;
when the angle beta in the length direction of two adjacent blades 3-4 is adjusted, the screws between the wheel disc 3-3 and the blades 3-4 are unscrewed, the relative positions of the wheel disc 3-3 and the first blade part 3-4-1 are kept fixed, after the second blade part 3-4-2 is rotated according to needs, the first blade part 3-4-1 and the second blade part 3-4-2 are attached, and the screws between the wheel disc 3-3 and the blades 3-4 are tightened.
The embodiments of the present invention are described in detail above with reference to the drawings, but the present invention is not limited to the described embodiments. It will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the spirit and scope of the invention.
Claims (4)
1. A rubbing device with adjustable blade inclination angle is characterized by comprising a base, a motor, a rotor blade system, a stator, a bearing and a bearing support; the stator comprises a stator support and a friction piece, the bearing support comprises a first rolling bearing support and a second rolling bearing support, and the first rolling bearing support, the second rolling bearing support, the motor and the stator support are coaxially arranged on the base; the rotor blade system comprises a coupler, a shaft, a wheel disc and blades, wherein one end of the shaft is connected with a motor through the coupler, the other end of the shaft penetrates through a first rolling bearing on a first rolling bearing support and a second rolling bearing on a second rolling bearing support, the wheel disc provided with the blades is arranged on the shaft, the rubbing part is arranged on a stator support, the rubbing part can be in contact with the blades when the wheel disc rotates, the angle between the width direction of each blade and the axial direction of the shaft is alpha, and the angle between the width direction of each blade and the length direction of each adjacent blade is beta;
the blade comprises a first blade part and a second blade part which are connected through a first fixing device, and the contact surface of the first blade part and the second blade part is an inclined surface;
when the angle alpha between the width direction of the blade and the axial direction of the shaft is adjusted, the relative positions of the first blade part and the second blade part are kept fixed, the second fixing device between the wheel disc and the blade is unscrewed, and the second fixing device between the wheel disc and the blade is screwed after the angle of the blade is rotated according to needs;
when the angle beta between the adjacent blades is adjusted, the second fixing device between the wheel disc and the blades is unscrewed, the relative position between the wheel disc and the first blade part is kept fixed, after the angle of the second blade part is rotated as required, the first blade part and the second blade part are attached to the contact surface, and the second fixing device between the wheel disc and the blades is screwed down.
2. The rubbing device with the adjustable blade inclination angle of claim 1, wherein the blades are uniformly distributed on the wheel disc, a plurality of threaded through holes are uniformly distributed on the wheel disc by taking the center of the wheel disc as the center, and counterweight screws are mounted on the threaded through holes as required to simulate unbalanced excitation.
3. The blade tilt angle adjustable rub device according to claim 1, wherein the rub member includes a rub member fixing rod and a simulation case, and the simulation case is installed at a bottom of the rub member fixing rod.
4. The blade inclination angle-adjustable rubbing device according to claim 1, wherein the first rolling bearing and the second rolling bearing are sliding bearings or rolling bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022414.XA CN111207916B (en) | 2020-01-09 | 2020-01-09 | Blade inclination angle adjustable rubs device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022414.XA CN111207916B (en) | 2020-01-09 | 2020-01-09 | Blade inclination angle adjustable rubs device |
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| CN111207916A CN111207916A (en) | 2020-05-29 |
| CN111207916B true CN111207916B (en) | 2021-01-12 |
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| CN202010022414.XA Active CN111207916B (en) | 2020-01-09 | 2020-01-09 | Blade inclination angle adjustable rubs device |
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| CN113530849B (en) * | 2021-06-28 | 2022-07-19 | 浙江大学 | Adjustable eccentric annular dynamic and static rotor collision friction experimental device |
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| CN111207916A (en) | 2020-05-29 |
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