CN113281043B - Dynamic stiffness testing device for bearing - Google Patents
Dynamic stiffness testing device for bearing Download PDFInfo
- Publication number
- CN113281043B CN113281043B CN202110466022.7A CN202110466022A CN113281043B CN 113281043 B CN113281043 B CN 113281043B CN 202110466022 A CN202110466022 A CN 202110466022A CN 113281043 B CN113281043 B CN 113281043B
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- sliding frame
- sliding
- bearing
- plate body
- loading device
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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
- G01M13/04—Bearings
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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
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention discloses a dynamic stiffness testing device for a bearing, which comprises a loading device and a bearing pressing plate, wherein the bearing pressing plate is provided with a mounting part which is used for being in running fit with a testing shaft, and the loading device is used for applying acting force to the bearing pressing plate in the direction perpendicular to the testing shaft. The invention applies radial load to the test shaft by using the bearing pressing plate, not only can precisely control the radial loading force of the test shaft, but also does not influence the rotation of the test shaft, can ensure the normal operation of the bearing so as to precisely simulate the load working state of the bearing, simplifies the structure of the test device, reduces the number of parts of the test device, improves the error superposition caused by a plurality of parts, and improves the detection precision of the test device.
Description
Technical Field
The invention relates to the technical field of bearings, in particular to a dynamic stiffness testing device for a bearing.
Background
The dynamic stiffness test of the bearing is to test the stiffness of the bearing in the running process of the bearing, and in order to load acting force in the running process of the bearing, the existing dynamic stiffness test device of the bearing is usually provided with a very complex structure for adapting to the bearing and a force loading structure is also complex. In order to solve the problem, the invention provides a dynamic stiffness testing device for a bearing.
Therefore, in order to solve the above problems, there is a need for a dynamic stiffness testing device for bearings, which simplifies the structure of the testing device, reduces the number of parts, and improves the detection accuracy.
Disclosure of Invention
In view of the above, the invention provides a dynamic stiffness testing device for bearings, which simplifies the structure of the testing device, reduces the number of parts and improves the detection precision.
The bearing dynamic stiffness testing device comprises a loading device and a bearing pressing plate, wherein the bearing pressing plate is provided with a mounting part which is used for being in running fit with a testing shaft, and the loading device is used for applying acting force to the bearing pressing plate in the direction perpendicular to the testing shaft.
Further, the bearing pressing plate comprises a plate body, the installation portion comprises an installation hole formed in the middle of the plate body, an inner ring installed in the installation hole and a roller arranged between the inner ring and the inner wall of the installation hole, and the inner ring is in running fit with the installation hole through the roller.
Further, the plate body can be slidably mounted on the sliding frame in a single degree of freedom, and the loading device can apply a force to the plate body in the sliding direction.
Further, the plate body and the sliding frame are vertically matched in a sliding mode through sliding rails.
Further, a guide hole is vertically formed in the top of the sliding frame, and the loading end of the loading device downwards penetrates through the guide hole.
Further, the carriage is rectangular frame structure, the spout with the slide rail adaptation has been seted up to the inboard of two vertical beams of carriage, the plate body is square board, the slide rail sets up on the left and right sides wall of plate body, spout and slide rail sliding fit.
Further, the sliding frame is formed by splicing a left half sliding frame and a right half sliding frame, and a half groove is formed at the joint surface of the left half sliding frame and the right half sliding frame and is combined with the joint surface of the left half sliding frame and the right half sliding frame to form a guide hole.
Further, still include the outer support, the outer support includes roof and connects the landing leg on the roof, the carriage is installed in the roof bottom, loading device installs in roof bottom and loading device's loading end is vertical downwards.
Further, inclined struts are connected to the outer sides of the two vertical beams of the sliding frame.
Further, the sliding frame comprises a base, a plurality of connecting pieces are arranged on the base in an array mode, and the sliding frame and the outer support are fixedly arranged on the base through a plurality of connecting pieces.
The invention has the beneficial effects that:
the radial load is applied to the test shaft by the bearing pressing plate, so that the radial loading force of the test shaft can be accurately controlled, the rotation of the test shaft is not influenced, the normal operation of the bearing can be ensured, the load working state of the bearing is accurately simulated, the structure of the test device is simplified, the number of parts of the test device is reduced, the error superposition caused by a plurality of parts is improved, and the detection precision of the test device is improved;
according to the invention, through the arrangement of the sliding frame, the bearing pressing plate can be limited to rotate, the bearing pressing plate is ensured to run along the preset direction, the stability of the loading direction is maintained, and the loading precision is improved; in addition, the vertical arrangement of the loading device, the sliding frame and the bearing pressing plate is facilitated by matching the outer support.
Drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a partial structure;
FIG. 3 is a schematic diagram of a test structure;
Detailed Description
As shown in the figure: the dynamic stiffness testing device for the bearing of the present embodiment includes a loading device 10 and a bearing pressing plate 20, wherein the bearing pressing plate is provided with a mounting part for being in running fit with a testing shaft 71, and the loading device is used for applying a force to the bearing pressing plate in a direction perpendicular to the testing shaft.
In this embodiment, a hydraulic cylinder is selected as the loading device, and of course, other loading devices with known structures may be selected, as shown in fig. 3, in the testing process, the middle part of the test shaft 71 is rotatably mounted on the mounting part of the bearing platen, two ends of the test shaft are rotatably mounted on the bearing seat 72, the bearing seat is rotatably mounted with the test shaft through the test bearing 73, the test shaft is in transmission fit with the rotor of the motor 74 through the coupling, the test shaft is horizontally arranged, the loading end of the loading device vertically abuts against the bearing platen and applies a vertical loading force to the bearing platen, the loading end of the loading device is provided with a pressure sensor for reading the loading force, the bearing seat is provided with a displacement sensor 75, and the displacement sensor may be overhead mounted above the bearing seat through a bracket for testing deformation of the bearing seat, or the displacement sensor may be axially opposite to the test bearing for detecting deformation of the outer ring of the test bearing, which is not described in detail; in the testing process, the motor drives the testing shaft to rotate, the loading device 10 applies acting force downwards to the bearing pressing plate 20, the acting force is transmitted to the testing shaft through the bearing pressing plate 20, the testing shaft is enabled to receive radial loading force, corresponding loading force is read through the pressure sensor, deformation of the testing bearing is read through the displacement sensor, loading force and displacement curve are obtained, and finally, the dynamic stiffness of the bearing is obtained.
In this embodiment, the bearing pressing plate includes a plate body 21, the installation portion includes an installation hole formed in the middle of the plate body, an inner ring 22 installed in the installation hole, and a roller 23 disposed between the inner ring and an inner wall of the installation hole, where the inner ring is in running fit with the installation hole through the roller. In combination with the illustration of fig. 2, the bearing pressing plate has the function of a traditional bearing, and simultaneously has the function of applying acting force to the test shaft in the rotation process, in order to ensure the performance stability of the bearing pressing plate, a retainer can be arranged in the mounting hole so as to ensure the circumferential direction of the rollers to be uniformly distributed, in the use process, the test shaft is sleeved in the inner ring and in interference transmission fit with the inner ring, in the rotation process of the test shaft, the inner ring correspondingly rotates, the plate body keeps static, the application of corresponding acting force on the plate body through the loading device is facilitated, and the loading force is transmitted to the test shaft through the rollers and the inner ring.
In this embodiment, the sliding frame 30 is further included, the plate 21 may be slidably mounted on the sliding frame in a single degree of freedom, and the loading device may apply a force to the plate 21 in the sliding direction. And in combination with the figures 1 and 2, the plate body is vertically and slidably arranged on the sliding frame, and in the vertical sliding process of the plate body driven by the recording device, vertical downward acting force is applied to the test shaft, and the stability of the loading direction is maintained and the loading precision is improved through the arrangement of the sliding frame.
In this embodiment, the plate body and the sliding frame are vertically slidably engaged through the sliding rail 40. The slide rail can be rectangular track, I-shaped track or dovetail track, wherein the slide rail can be arranged on the slide frame, and the plate body is slidably mounted on the slide rail at the moment, or the slide rail can be arranged on the plate body, and correspondingly, the slide rail is arranged on the slide frame and is provided with a slide groove matched with the slide rail, so that the sliding precision of the plate body is improved through the arrangement of the slide rail.
In this embodiment, a guide hole is vertically formed in the top of the sliding frame, and the loading end of the loading device passes through the guide hole downwards. The loading device adopts the pneumatic cylinder, and the output rod of pneumatic cylinder passes the guiding hole, and the guiding hole is round hole structure, guiding hole and output rod clearance fit, form the direction to the output rod through the guiding hole, improve loading precision.
In this embodiment, the carriage is rectangular frame structure, the spout 35 with the slide rail adaptation has been seted up to the inboard of two vertical beams of carriage, the plate body is square board, the slide rail sets up on the lateral wall about the plate body, spout and slide rail sliding fit. In combination with the illustration of fig. 1, the sliding frame is provided with two vertical beams, the inner side of each vertical beam is provided with a sliding groove which extends vertically and the section of which is rectangular, the sliding rail is a rectangular track which is matched with the sliding groove, the width of the plate body is the same as the width between the two vertical beams, the plate body is arranged between the two vertical beams, the track is in sliding fit with the sliding groove, and the lateral movement of the plate body is limited by the structure, so that the plate body can slide only vertically in a single degree of freedom, and the sliding precision of the plate body is improved, and the loading precision is further improved.
In this embodiment, the sliding frame is formed by splicing a left half sliding frame 31 and a right half sliding frame 32, and a half groove 33 is formed at the joint surface of the left half sliding frame 31 and the right half sliding frame 32, and the joint surface of the left half sliding frame 31 and the right half sliding frame 32 is combined to form a guide hole. Referring to fig. 1, the left half carriage 31 has an inverted L-shaped structure, and the left half carriage and the right half carriage have a bilateral symmetry structure, so that after being spliced, they form a rectangular frame structure with an opening at the lower end; the end parts of the cross beams of the left half sliding frame and the right half sliding frame are provided with circular half grooves, and the two circular half grooves are encircled to form a circular guide hole; for the assembly of half left carriage 31 and half right carriage 32 of being convenient for, half left carriage 31 and half right carriage 32's crossbeam tip department is connected with lug 36, makes half left carriage 31 and half right carriage 32 even as an organic whole through bolt-up after two lugs dock, is convenient for the dismantlement of carriage through this structure, also is convenient for with the assembly of plate body 21.
In this embodiment, the outer bracket 50 further comprises a top plate 51 and a leg 52 connected to the top plate, the sliding frame is installed at the bottom of the top plate, and the loading device is installed at the bottom of the top plate with the loading end of the loading device facing downwards vertically. And in combination with the illustration of fig. 1, two supporting legs are respectively connected to the left side and the right side of the top plate, and the four supporting legs are arranged in four corners.
In this embodiment, the two vertical beams of the sliding frame are connected with diagonal braces 34 at the outer sides. As shown in fig. 1 to 3, the bottom of the diagonal brace is bent to form a horizontal connection portion, and the horizontal connection portion is fixedly connected to the bottom plate 60, wherein the diagonal brace on the left side is located between the two left support legs 52, and the diagonal brace on the right side is located between the two right support legs; the left half sliding frame 31 and the right half sliding frame 32 are laterally supported through the diagonal braces, so that the stability of the sliding frame is improved, and the opening at the lower end of the sliding frame is prevented from being stressed to be stretched and deformed.
In this embodiment, the sliding rack further comprises a base 60, a plurality of connecting pieces 61 are arranged on the base in an array, and the sliding rack and the outer bracket are fixedly installed on the base through a plurality of connecting pieces. The connecting piece can be the double-screw bolt of connecting in the base upper surface, perhaps can be for seting up the screw hole on the base, the base is platelike structure in this embodiment, a plurality of screw holes have been arranged at base upper surface rectangle array, the connecting hole has all been seted up to mount pad of motor, the bearing frame, the bracing and outer support 50 bottom, wherein landing leg 52 and bracing 34 bottom are buckled and are formed horizontally connecting portion, the connecting hole has been seted up on the connecting portion, support in the base upper surface through connecting portion level, through selecting the screw hole that matches with the connecting hole, and then do benefit to the regulation of each part mounted position.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (4)
1. The utility model provides a bearing dynamic stiffness testing arrangement which characterized in that: the test device comprises a loading device and a bearing pressing plate, wherein the bearing pressing plate is provided with a mounting part for being in running fit with a test shaft, and the loading device is used for applying acting force to the bearing pressing plate in the direction perpendicular to the test shaft;
the bearing pressing plate comprises a plate body, wherein the mounting part only comprises a mounting hole formed in the middle of the plate body, an inner ring mounted in the mounting hole and a roller arranged between the inner ring and the inner wall of the mounting hole, and the inner ring is in rotary fit with the mounting hole through the roller;
the plate body can be slidably arranged on the sliding frame in a single degree of freedom, and the loading device can apply acting force to the plate body in the sliding direction;
the plate body is vertically matched with the sliding frame in a sliding way through a sliding rail;
the top of the sliding frame is vertically provided with a guide hole, and the loading end of the loading device downwards passes through the guide hole;
the sliding frame is of a rectangular frame structure, sliding grooves matched with sliding rails are formed in the inner sides of two vertical beams of the sliding frame, the plate body is a square plate, the sliding rails are arranged on the left side wall and the right side wall of the plate body, and the sliding grooves are in sliding fit with the sliding rails;
the sliding frame is formed by splicing a left half sliding frame and a right half sliding frame, and a half groove is formed at the joint surface of the left half sliding frame and the right half sliding frame and is combined with the joint surface of the left half sliding frame and the right half sliding frame to form a guide hole.
2. The bearing dynamic stiffness testing apparatus according to claim 1, wherein: the outer support comprises a top plate and supporting legs connected to the top plate, the sliding frame is mounted at the bottom of the top plate, and the loading device is mounted at the bottom of the top plate and the loading end of the loading device is vertically downward.
3. The bearing dynamic stiffness testing apparatus according to claim 1, wherein: and inclined struts are connected to the outer sides of the two vertical beams of the sliding frame.
4. The bearing dynamic stiffness testing apparatus according to claim 2, wherein: the sliding frame and the outer support are fixedly arranged on the base through a plurality of connecting pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110466022.7A CN113281043B (en) | 2021-04-28 | 2021-04-28 | Dynamic stiffness testing device for bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110466022.7A CN113281043B (en) | 2021-04-28 | 2021-04-28 | Dynamic stiffness testing device for bearing |
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| Publication Number | Publication Date |
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| CN113281043A CN113281043A (en) | 2021-08-20 |
| CN113281043B true CN113281043B (en) | 2023-06-06 |
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