CN114441168A - Testing device and turbo expander - Google Patents
Testing device and turbo expander Download PDFInfo
- Publication number
- CN114441168A CN114441168A CN202011217626.XA CN202011217626A CN114441168A CN 114441168 A CN114441168 A CN 114441168A CN 202011217626 A CN202011217626 A CN 202011217626A CN 114441168 A CN114441168 A CN 114441168A
- Authority
- CN
- China
- Prior art keywords
- pivot
- loading
- bearing
- rotating shaft
- adjusting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 115
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 230000009471 action Effects 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims description 10
- 230000001174 ascending effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 238000005191 phase separation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to a testing device and a turboexpander, wherein a gas bearing comprises a rotating shaft and a testing bearing sleeved outside the rotating shaft, the rotating shaft can rotate around the axial direction of the rotating shaft relative to the testing bearing, a gap is arranged between the rotating shaft and the testing bearing in the radial direction of the rotating shaft, by supplying air to the gap between the rotating shaft and the test bearing in the radial direction of the rotating shaft, an air film distributed along the radial direction of the rotating shaft is formed between the rotating shaft and the test bearing, thereby the rotating shaft is suspended relative to the testing bearing through the bearing action of the air film on the testing bearing in the radial direction of the rotating shaft, the testing device comprises a loading mechanism and a sensor, one end of the sensor is connected with the testing bearing, the other end of the sensor is connected with the loading mechanism, the loading mechanism can drive the testing bearing to move along the radial direction of the rotating shaft through the sensor, so as to adjust the thickness of the air film in the radial direction of the rotating shaft, thereby adjusting the bearing capacity of the air film in the radial direction of the rotating shaft; the sensor is used for detecting the bearing capacity of the air film in the radial direction of the rotating shaft.
Description
Technical Field
The invention relates to the technical field of gas bearing testing, in particular to a testing device and a turboexpander.
Background
In a gas bearing of a turboexpander, due to the action of unbalanced force, a rotating shaft is eccentric in a test bearing, so that the thickness distribution of an air film formed between the rotating shaft and the test bearing in the radial direction of the rotating shaft is uneven, air is brought into a gap between the rotating shaft and the test bearing in the radial direction of the rotating shaft to be compressed under the action of dynamic pressure effect, and the air film with certain bearing capacity is formed.
Disclosure of Invention
Based on the above, the invention provides a testing device and a turboexpander, which can detect the bearing capacity of the air film with different thicknesses formed between the rotating shaft and the testing bearing in the radial direction of the rotating shaft.
The utility model provides a testing arrangement for cooperate with gas bearing, gas bearing includes that pivot and cover are located the outer test bearing of pivot, the pivot can be relative test bearing winds the axial of pivot self is rotated, the pivot with between the test bearing the footpath of pivot has the clearance, through to the pivot with between the test bearing in the radial ascending clearance air feed of pivot can make the pivot with form between the test bearing and follow the radially distributed's of pivot gas film, thereby pass through the gas film is right test bearing is in the radial ascending bearing effect of pivot makes the pivot is relative test bearing suspension, testing arrangement includes:
a loading mechanism; and
one end of the sensor is connected with the test bearing, the other end of the sensor is connected with the loading mechanism, and the loading mechanism can drive the test bearing to move along the radial direction of the rotating shaft through the sensor so as to adjust the thickness of the air film in the radial direction of the rotating shaft, so that the bearing capacity of the air film in the radial direction of the rotating shaft can be adjusted; the sensor is used for detecting the bearing capacity of the air film in the radial direction of the rotating shaft.
In one embodiment, the loading mechanism comprises:
the loading assembly is connected with one end of the sensor, which is far away from the test bearing; and
the driving assembly is linked with the loading assembly and can drive the loading assembly to move along the radial direction of the rotating shaft, and then the sensor drives the test bearing to move along the radial direction of the rotating shaft.
In one embodiment, the loading component comprises:
a base;
the loading module is arranged on the base in a sliding mode and is connected with one end, far away from the test bearing, of the sensor; and
the diversion piece rotates set up in on the base, just the both ends of diversion piece can respectively with drive assembly with the loading module offsets and holds, drive assembly can drive the diversion piece is relative the base winds the rotation center of diversion piece rotates, in order to pass through the diversion piece changes drive assembly's application of force direction and drive the loading module is relative the base is followed the radial movement of pivot, and then pass through the sensor drives the test bearing is followed the radial movement of pivot.
In one embodiment, one end of the loading module, which is far away from the sensor, is provided with a first abutting piece, the first abutting piece is of a spherical structure, and the first abutting piece is used for abutting against one end, which is far away from the driving assembly, of the direction changing piece.
In one embodiment, the direction-changing member has a first contact portion and a second contact portion, the first contact portion is used for abutting against the driving assembly, the second contact portion is used for abutting against the loading module, and the ratio of the vertical distance from the first contact portion to the rotation center of the direction-changing member to the vertical distance from the second contact portion to the rotation center of the direction-changing member is greater than 1, so that the radial moving stroke of the loading module along the rotating shaft under the force transmission effect of the direction-changing member is reduced.
In one embodiment, the driving assembly includes:
the loading piece is arranged on the base in a sliding mode and can abut against one end of the direction changing piece; and
the adjusting piece, the adjusting piece wear to locate one side of base and with the loading piece is connected, just the adjusting piece with the base is screwed mutually, rotates the adjusting piece, can drive the axial displacement of adjusting piece along self, in order to drive the loading piece is relative the base is followed the axial displacement of adjusting piece, and then so that the loading piece supports and holds and drive the diversion piece is relative the base is around the rotation center of diversion piece rotates or with diversion piece phase separation.
In one embodiment, the adjusting member is screwed with the loading member, and the rotating of the adjusting member can drive the adjusting member to move along the axial direction thereof, so as to drive the loading member to move along the axial direction of the adjusting member relative to the adjusting member, thereby adjusting the moving stroke of the loading member along the axial direction of the adjusting member.
In one embodiment, the adjusting member includes a first adjusting portion and a second adjusting portion that are connected and coaxially disposed, the first adjusting portion is screwed to penetrate one side of the base, an outer diameter of the second adjusting portion is smaller than an outer diameter of the first adjusting portion, one end of the second adjusting portion, which is far away from the first adjusting portion, is screwed to the loading member, and the first adjusting portion is rotated to drive the first adjusting portion and the second adjusting portion to move along an axial direction of the adjusting member, so as to drive the loading member to move along the axial direction of the adjusting member relative to the second adjusting portion, thereby adjusting a moving stroke of the loading member along the axial direction of the adjusting member.
In one embodiment, the driving assembly further includes a second abutting member, the second abutting member is a spherical structure, the second abutting member is disposed at one end of the loading member, and the second abutting member is used for abutting against one end of the direction changing member away from the loading assembly.
A turboexpander comprising: gas bearing and above-mentioned testing arrangement, gas bearing includes that pivot and cover are located the outer test bearing of pivot, the pivot can be relative test bearing winds the axial of pivot self rotates, the pivot with between the test bearing the footpath of pivot has the clearance, through to the pivot with between the test bearing the epaxial clearance air feed of pivot can make the pivot with form the edge between the test bearing the radial distribution's of pivot gas film, thereby pass through the gas film is right test bearing is in the epaxial bearing effect of pivot makes the pivot is relative test bearing suspension.
In the testing device provided by the application, the loading mechanism can drive the testing bearing to move along the radial direction of the rotating shaft through the sensor so as to adjust the thickness of the air film formed between the rotating shaft and the testing bearing in the radial direction of the rotating shaft and adjust the bearing capacity of the air film in the radial direction of the rotating shaft, and in the process, the sensor can detect the bearing capacity of the air film in the radial direction of the rotating shaft in real time Good real-time performance and high accuracy.
Drawings
FIG. 1 is a schematic sectional view of a turboexpander in one embodiment;
fig. 2 is a schematic cross-sectional view of another perspective of a turboexpander in one embodiment.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1, the turboexpander 10 in an embodiment includes a gas bearing 100 and a testing device 200, the gas bearing 100 includes a rotating shaft 110 and a testing bearing 120 sleeved outside the rotating shaft 110, the rotating shaft 110 can rotate around an axial direction of the rotating shaft 110 relative to the testing bearing 120, a gap is provided between the rotating shaft 110 and the testing bearing 120 in a radial direction of the rotating shaft 110, and a gas film distributed in the radial direction of the rotating shaft 110 is formed between the rotating shaft 110 and the testing bearing 120 by supplying gas to the gap between the rotating shaft 110 and the testing bearing 120 in the radial direction of the rotating shaft 110, so that the rotating shaft 110 is suspended relative to the testing bearing 120 by the gas film to bear the testing bearing 120 in the radial direction of the rotating shaft 110, and thus, a friction force between the rotating shaft 110 and the testing bearing 120 is reduced.
The testing device 200 is used for matching with the gas bearing 100, the testing device 200 comprises a loading mechanism 210 and a sensor 220, one end of the sensor 220 is connected with the testing bearing 120, the other end of the sensor 220 is connected with the loading mechanism 210, the loading mechanism 210 can drive the testing bearing 120 to move along the radial direction of the rotating shaft 110 through the sensor 220, and the thickness of the gas film in the radial direction of the rotating shaft 110 can be adjusted, so that the bearing capacity of the gas film in the radial direction of the rotating shaft 110 can be adjusted; the sensor 220 is used to detect the bearing capacity of the air film in the radial direction of the rotating shaft 110.
In the testing apparatus 200 provided by the present application, the loading mechanism 210 can drive the testing bearing 120 to move along the radial direction of the rotating shaft 110 through the sensor 220, so as to adjust the thickness of the air film formed between the rotating shaft 110 and the testing bearing 120 in the radial direction of the rotating shaft 110, and thus adjust the bearing capacity of the air film in the radial direction of the rotating shaft 110, and in this process, the sensor 220 can detect the bearing capacity of the air film in the radial direction of the rotating shaft 110 in real time, so that the testing apparatus 200 provided by the present application can realize that the bearing capacity of the air film with different thicknesses formed between the rotating shaft 110 and the testing bearing 120 in the radial direction of the rotating shaft 110 is transferred to a larger space for real-time detection through the mutual cooperation of the loading mechanism 210 and the sensor 220, thereby solving the limitation that the conventional detection equipment cannot be directly installed in the small gap formed between the rotating shaft 110 and the testing bearing 120 to detect the bearing capacity of the air film in the radial direction of the rotating shaft 110, the method has the advantages of high working stability, good real-time performance and high accuracy.
As shown in fig. 1, in an embodiment, the testing device 200 further includes a connecting member 230, and two ends of the connecting member 230 are respectively connected to the testing bearing 120 and the sensor 220 to connect the sensor 220 to the testing bearing 120.
In one embodiment, the loading mechanism 210 includes a loading assembly 240 and a drive assembly 250, the loading assembly 240 being coupled to an end of the sensor 220 remote from the test bearing 120; the driving assembly 250 is linked with the loading assembly 240, and the driving assembly 250 can drive the loading assembly 240 to move along the radial direction of the rotating shaft 110, so as to drive the test bearing 120 to move along the radial direction of the rotating shaft 110 through the sensor 220.
In one embodiment, the loading assembly 240 includes a base 260, a loading module 270, and a direction changing member 280, wherein the loading module 270 is slidably disposed on the base 260 and connected to an end of the sensor 220 away from the test bearing 120; the direction changing member 280 is rotatably disposed on the base 260, two ends of the direction changing member 280 can respectively abut against the driving assembly 250 and the loading module 270, the driving assembly 250 can drive the direction changing member 280 to rotate around a rotation center of the direction changing member 280 relative to the base 260, so as to drive the loading module 270 to move radially along the rotating shaft 110 relative to the base 260 through the direction changing member 280, and further drive the test bearing 120 to move radially along the rotating shaft 110 through the sensor 220.
In an embodiment, the base 260 further includes a bottom frame 261 and a first support arm 262, the first support arm 262 is disposed on the bottom frame 261, specifically, the first support arm 262 is vertically disposed on the bottom frame 261, the loading module 270 is slidably disposed on the first support arm 262, and the direction changing element 280 is rotatably disposed on the bottom frame 261.
In an embodiment, an end of the loading module 270 away from the sensor 220 has a first abutting member 272, the first abutting member 272 is a spherical structure, and the first abutting member 272 is configured to abut against an end of the direction changing member 280 away from the driving assembly 250. Through the arrangement of the first abutting piece 272 with a spherical structure, point-surface contact between the loading module 270 and the direction-changing piece 280 can be realized, so that only interaction in a single direction exists between the loading module 270 and the direction-changing piece 280, and friction between the loading module 270 and the direction-changing piece 280 can be reduced, so that accurate control of radial movement of the loading module 270 relative to the base 260 along the rotating shaft 110 is realized, and accurate adjustment of the radial position of the test bearing 120 along the rotating shaft 110 is further ensured.
In an embodiment, the loading module 270 further includes a loading head 274 and a bearing sleeve 276, the bearing sleeve 276 is disposed on the base 260, specifically, the bearing sleeve 276 is disposed on the first support arm 262, the loading head 274 is slidably sleeved in the bearing sleeve 276, two ends of the loading head 274 extend out of the bearing sleeve 276 and are respectively connected to the sensor 220 and the first abutting member 272, the driving assembly 250 can drive the direction changing member 280 to rotate around a rotation center of the direction changing member 280 relative to the base 260, so as to change a force applying direction of the driving assembly 250 through the direction changing member 280 and drive the loading head 274 connected to the first abutting member 272 to move in a radial direction of the rotating shaft 110 relative to the bearing sleeve 276, and further drive the test bearing 120 to move in the radial direction of the rotating shaft 110 through the sensor 220.
In one embodiment, the loading assembly 240 further includes a rotating shaft 110, the rotating shaft 110 is disposed at a rotation center of the direction changing member 280 and is connected to the base 260, and the direction changing member 280 can rotate relative to the base 260 around an axial direction of the rotating shaft 110.
In an embodiment, the driving assembly 250 includes a loading member 251 and an adjusting member 252, the loading member 251 is slidably disposed on the base 260, and the loading member 251 can abut against one end of the direction changing member 280; the adjusting member 252 is disposed through one side of the base 260 and connected to the loading member 251, and the adjusting member 252 is screwed to the base 260, so that the adjusting member 252 is rotated to drive the adjusting member 252 to move along its own axial direction, so as to drive the loading member 251 to move along the axial direction of the adjusting member 252 relative to the base 260, and further to make the loading member 251 abut against and drive the direction changing member 280 to rotate around the rotation center of the direction changing member 280 relative to the base 260 or separate from the direction changing member 280. The moving stroke of the loading part 251 along the axial direction of the adjusting part 252 is regulated and controlled by rotating the adjusting part 252, so that the moving stroke of the direction changing part 280 in the force applying direction of the loading part 251 is accurately controllable, and the accurate adjustment of the position of the test bearing 120 along the radial direction of the rotating shaft 110 is further ensured. In an embodiment, the base 260 further includes a second supporting arm 263, the second supporting arm 263 is disposed on the bottom frame 261 and spaced apart from the first supporting arm 262, the second supporting arm 263 is vertically disposed on the bottom frame 261, the adjusting element 252 is disposed through the second supporting arm 263 and connected to the loading element 251, and the adjusting element 252 is screwed to the second supporting arm 263.
In an embodiment, the adjusting element 252 is screwed with the loading element 251, and the adjusting element 252 is rotated to drive the adjusting element 252 to move along its own axial direction, so as to drive the loading element 251 to move along the axial direction of the adjusting element 252 relative to the adjusting element 252, thereby adjusting the moving stroke of the loading element 251 along the axial direction of the adjusting element 252, so as to improve the adjusting accuracy of the moving stroke of the direction changing element 280 in the force applying direction of the loading element 251, and further ensure the accurate adjustment of the position of the test bearing 120 in the radial direction of the rotating shaft 110.
In one embodiment, the adjusting member 252 includes a first adjusting portion 253 and a second adjusting portion 254 that are connected and coaxially disposed, the first adjusting portion 253 is screwed and inserted into one side of the base 260, specifically, the first adjusting portion 253 is screwed and inserted into the second supporting arm 263, the outer diameter of the second adjusting portion 254 is smaller than the outer diameter of the first adjusting portion 253, one end of the second adjusting portion 254 away from the first adjusting portion 253 is screwed with the loading member 251, the first adjusting portion 253 is rotated, the first adjustment portion 253 can be driven to move along with the second adjustment portion 254 in the axial direction of the adjustment member 252, so as to drive the loading member 251 to move along the axial direction of the adjusting member 252 relative to the second adjusting portion 254, thereby adjusting the moving stroke of the loading member 251 along the axial direction of the adjusting member 252, improving the adjusting precision of the moving stroke of the direction changing member 280 in the force applying direction of the loading member 251, thereby ensuring accurate adjustment of the position of the test bearing 120 in the radial direction of the rotating shaft 110.
In an embodiment, the driving assembly 250 further includes a second abutting member 255, the second abutting member 255 is a spherical structure, the second abutting member 255 is disposed at one end of the loading member 251, and the second abutting member 255 is configured to abut against one end of the direction changing member 280 away from the loading assembly 240. Through the arrangement of the second abutting part 255 with a spherical structure, point-surface contact between the driving component 250 and the direction-changing part 280 can be realized, so that only interaction in a single direction exists between the driving component 250 and the direction-changing part 280, and therefore, friction between the driving component 250 and the direction-changing part 280 can be reduced, accurate control of a moving stroke of the direction-changing module in the force application direction of the driving component 250 is realized, and accurate adjustment of the position of the test bearing 120 in the radial direction of the rotating shaft 110 is further ensured.
In an embodiment, the direction-changing member 280 has a first contact portion and a second contact portion, the first contact portion is used for abutting against the driving assembly 250, the second contact portion is used for abutting against the loading module 270, and a ratio of a vertical distance from the first contact portion to a rotation center of the direction-changing member 280 to a vertical distance from the second contact portion to the rotation center of the direction-changing member 280 is greater than 1, so as to reduce a radial movement stroke of the loading module 270 along the rotating shaft 110 under a force transmission effect of the direction-changing member 280, and further ensure accurate adjustment of a radial position of the test bearing 120 along the rotating shaft 110. In the present embodiment, the first contact portion is used to abut against the second abutting member 255, and the second contact portion is used to abut against the first abutting member 272.
In one embodiment, the ratio of the perpendicular distance from the first contact portion to the center of rotation of the direction changing member 280 to the perpendicular distance from the second contact portion to the center of rotation of the direction changing member 280 is 62.5/1. That is, when the direction-changing element 280 moves by 62.5 micrometers in the force application direction of the driving assembly 250, the loading module 270 moves by 1 micrometer in the radial direction of the rotating shaft 110 under the force transmission effect of the direction-changing element 280.
As shown in fig. 1 and fig. 2, in an embodiment, the gas bearing 100 further includes a housing 130, the test bearing 120 is disposed in the housing 130, one end of the rotating shaft 110 extends out of the housing 130 through a sidewall of the housing 130, the sensor 220 is disposed outside the housing 130, and one end of the connecting member 230 away from the test bearing 120 penetrates through the sidewall of the housing 130 and is connected to the sensor 220. In an embodiment, the gas bearing 100 further includes an impeller fixed at an end of the rotating shaft 110 exposed to the housing 130, the impeller is used for being matched with a nozzle, and the nozzle can blow air to the impeller to drive the impeller and the rotating shaft 110 to rotate around the axis of the rotating shaft 110.
As shown in fig. 2, in an embodiment, an air inlet 132 is provided on a side wall of the housing 130, the air inlet 132 is communicated with a gap between the rotating shaft 110 and the test bearing 120 in a radial direction of the rotating shaft 110, and the air inlet 132 is used for allowing external air to flow into the gap between the rotating shaft 110 and the test bearing 120 in the radial direction of the rotating shaft 110.
In an embodiment, the gas bearing 100 further includes two auxiliary bearings 140, the two auxiliary bearings 140 are respectively sleeved at two ends of the rotating shaft 110, and the testing bearing 120 is located between the two auxiliary bearings 140, the two auxiliary bearings 140 are disposed in the housing 130 and sleeved outside the rotating shaft 110, so as to support the rotating shaft 110, and the rotating shaft 110 can rotate around the rotating shaft 110 in the axial direction of the rotating shaft 110 relative to the two auxiliary bearings 140.
In an embodiment, a gap is formed between the rotating shaft 110 and the auxiliary bearing 140 in the radial direction of the rotating shaft 110, and by supplying air to the gap between the rotating shaft 110 and the auxiliary bearing 140 in the radial direction of the rotating shaft 110, an air film distributed in the radial direction of the rotating shaft 110 is formed between the rotating shaft 110 and the auxiliary bearing 140, so that the rotating shaft 110 is suspended relative to the auxiliary bearing 140 by the load-bearing effect of the air film on the auxiliary bearing 140 in the radial direction of the rotating shaft 110, and thus, the effect of reducing the friction force between the rotating shaft 110 and the auxiliary bearing 140 is achieved.
In one embodiment, the air inlet 132 communicates with a gap between the rotating shaft 110 and the auxiliary bearing 140 in a radial direction of the rotating shaft 110, and the air inlet 132 is used for external air to flow into the gap between the rotating shaft 110 and the auxiliary bearing 140 in the radial direction of the rotating shaft 110.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a testing arrangement for cooperate with gas bearing, gas bearing includes that pivot and cover are located the outer test bearing of pivot, the pivot can be relative test bearing winds the axial of pivot self is rotated, the pivot with between the test bearing the footpath of pivot has the clearance, through to the pivot with between the test bearing in the radial ascending clearance air feed of pivot can make the pivot with form between the test bearing and follow the radially distributed's of pivot gas film, thereby pass through the gas film is right test bearing is in the radial ascending bearing effect of pivot makes the pivot is relative test bearing suspension, its characterized in that, testing arrangement includes:
a loading mechanism; and
one end of the sensor is connected with the test bearing, the other end of the sensor is connected with the loading mechanism, and the loading mechanism can drive the test bearing to move along the radial direction of the rotating shaft through the sensor so as to adjust the thickness of the air film in the radial direction of the rotating shaft, so that the bearing capacity of the air film in the radial direction of the rotating shaft can be adjusted; the sensor is used for detecting the bearing capacity of the air film in the radial direction of the rotating shaft.
2. The testing device of claim 1, wherein the loading mechanism comprises:
the loading assembly is connected with one end of the sensor, which is far away from the test bearing; and
the driving assembly is linked with the loading assembly and can drive the loading assembly to move along the radial direction of the rotating shaft, and then the sensor drives the test bearing to move along the radial direction of the rotating shaft.
3. The testing device of claim 2, wherein the loading assembly comprises:
a base;
the loading module is arranged on the base in a sliding mode and is connected with one end, far away from the test bearing, of the sensor; and
the diversion piece rotates set up in on the base, just the both ends of diversion piece can respectively with drive assembly with the loading module offsets and holds, drive assembly can drive the diversion piece is relative the base winds the rotation center of diversion piece rotates, in order to pass through the diversion piece changes drive assembly's application of force direction and drive the loading module is relative the base is followed the radial movement of pivot, and then pass through the sensor drives the test bearing is followed the radial movement of pivot.
4. The testing device as claimed in claim 3, wherein the loading module has a first abutting member at an end thereof away from the sensor, the first abutting member is a spherical structure, and the first abutting member is configured to abut against an end of the direction-changing member away from the driving assembly.
5. The testing device as claimed in claim 3, wherein the direction-changing member has a first contact portion and a second contact portion, the first contact portion is configured to abut against the driving assembly, the second contact portion is configured to abut against the loading module, and a ratio of a vertical distance from the first contact portion to a rotation center of the direction-changing member to a vertical distance from the second contact portion to the rotation center of the direction-changing member is greater than 1, so as to reduce a radial movement stroke of the loading module along the rotation axis under the force transmission action of the direction-changing member.
6. The testing device of claim 3, wherein the drive assembly comprises:
the loading piece is arranged on the base in a sliding mode and can be abutted against one end of the direction changing piece; and
the adjusting piece, the adjusting piece wear to locate one side of base and with the loading piece is connected, just the adjusting piece with the base is screwed mutually, rotates the adjusting piece, can drive the axial displacement of adjusting piece along self, in order to drive the loading piece is relative the base is followed the axial displacement of adjusting piece, and then so that the loading piece supports and holds and drive the diversion piece is relative the base is around the rotation center of diversion piece rotates or with diversion piece phase separation.
7. The testing device as claimed in claim 6, wherein the adjusting member is screwed with the loading member, and rotation of the adjusting member drives the adjusting member to move in its own axial direction, so as to drive the loading member to move relative to the adjusting member in the axial direction of the adjusting member, thereby adjusting the moving stroke of the loading member in the axial direction of the adjusting member.
8. The testing device as claimed in claim 7, wherein the adjusting member includes a first adjusting portion and a second adjusting portion, which are connected and coaxially disposed, the first adjusting portion is screwed and inserted into one side of the base, an outer diameter of the second adjusting portion is smaller than an outer diameter of the first adjusting portion, one end of the second adjusting portion, which is far away from the first adjusting portion, is screwed with the loading member, and the first adjusting portion is rotated to drive the first adjusting portion and the second adjusting portion to move along an axial direction of the adjusting member, so as to drive the loading member to move along the axial direction of the adjusting member relative to the second adjusting portion, thereby adjusting a moving stroke of the loading member along the axial direction of the adjusting member.
9. The testing device as claimed in claim 6, wherein the driving assembly further includes a second abutting member, the second abutting member is a spherical structure, the second abutting member is disposed at one end of the loading member, and the second abutting member is configured to abut against one end of the direction changing member away from the loading assembly.
10. A turboexpander, comprising: the gas bearing reaches testing arrangement of any one of claims 1 to 9, the gas bearing includes the pivot and the cover is located the outer test bearing of pivot, the pivot can be relative the test bearing winds the axial of pivot self rotates, the pivot with between the test bearing in the footpath of pivot has the clearance, through to the pivot with between the test bearing in the epaxial clearance air feed of pivot is radially upwards, can make the pivot with form between the test bearing along the radial distribution's of pivot gas film to through the gas film is to the test bearing is in the epaxial bearing effect of pivot makes the pivot is relative the test bearing suspension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011217626.XA CN114441168A (en) | 2020-11-04 | 2020-11-04 | Testing device and turbo expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011217626.XA CN114441168A (en) | 2020-11-04 | 2020-11-04 | Testing device and turbo expander |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114441168A true CN114441168A (en) | 2022-05-06 |
Family
ID=81361920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011217626.XA Pending CN114441168A (en) | 2020-11-04 | 2020-11-04 | Testing device and turbo expander |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114441168A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000155073A (en) * | 1998-11-24 | 2000-06-06 | Nsk Ltd | Rotational accuracy/dynamic torque measuring device for radial rolling bearing |
| CN101915662A (en) * | 2010-07-09 | 2010-12-15 | 大连海事大学 | Bearing-rotor system loading test device and method |
| US20130142674A1 (en) * | 2011-12-05 | 2013-06-06 | GM Global Technology Operations LLC | Fuel cell compressor air bearing wear sensor |
| CN203201603U (en) * | 2013-05-06 | 2013-09-18 | 朱倩 | Turbo expander with pressure and rotating speed intelligent protective device |
| KR101314468B1 (en) * | 2012-08-27 | 2013-10-07 | 박상신 | Mesuring device for stiffness and damping coefficient of air bearing |
| CN203847561U (en) * | 2014-06-05 | 2014-09-24 | 浙江机电职业技术学院 | Hydrostatic gas-lubricated bearing for vertical helium turbo expander |
| CN108426712A (en) * | 2018-01-31 | 2018-08-21 | 西安工业大学 | Wholecircle circumferentially slides radial test and loading device |
| CN108627344A (en) * | 2018-06-28 | 2018-10-09 | 杭州电子科技大学 | A kind of air-floating ball bearing device for detecting performance and detection method |
| CN208672308U (en) * | 2018-06-28 | 2019-03-29 | 杭州电子科技大学 | A kind of air-floating ball bearing device for detecting performance |
-
2020
- 2020-11-04 CN CN202011217626.XA patent/CN114441168A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000155073A (en) * | 1998-11-24 | 2000-06-06 | Nsk Ltd | Rotational accuracy/dynamic torque measuring device for radial rolling bearing |
| CN101915662A (en) * | 2010-07-09 | 2010-12-15 | 大连海事大学 | Bearing-rotor system loading test device and method |
| US20130142674A1 (en) * | 2011-12-05 | 2013-06-06 | GM Global Technology Operations LLC | Fuel cell compressor air bearing wear sensor |
| KR101314468B1 (en) * | 2012-08-27 | 2013-10-07 | 박상신 | Mesuring device for stiffness and damping coefficient of air bearing |
| CN203201603U (en) * | 2013-05-06 | 2013-09-18 | 朱倩 | Turbo expander with pressure and rotating speed intelligent protective device |
| CN203847561U (en) * | 2014-06-05 | 2014-09-24 | 浙江机电职业技术学院 | Hydrostatic gas-lubricated bearing for vertical helium turbo expander |
| CN108426712A (en) * | 2018-01-31 | 2018-08-21 | 西安工业大学 | Wholecircle circumferentially slides radial test and loading device |
| CN108627344A (en) * | 2018-06-28 | 2018-10-09 | 杭州电子科技大学 | A kind of air-floating ball bearing device for detecting performance and detection method |
| CN208672308U (en) * | 2018-06-28 | 2019-03-29 | 杭州电子科技大学 | A kind of air-floating ball bearing device for detecting performance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104354135B (en) | Aero-engine turns stator and assembles/measure five degree of freedom adjustment localization method and device | |
| CN205184279U (en) | Multi -functional high -precision rotary table of formula that can make up | |
| CN100529699C (en) | Micro-bearing friction torgue measuring instrument | |
| CN101487751B (en) | Measuring apparatus for frictional moment of bearing under different axial loads and rotation speeds | |
| WO2023004911A1 (en) | Self-aligning rolling bearing performance testing apparatus and rigidity testing method | |
| CN102393304B (en) | Sliding barrel type central frame used in solid rocket motor static test | |
| CN110160784B (en) | Adjustable eccentric sliding bearing test device | |
| CN201909614U (en) | Rotating platform structure for automatic optical measuring instruments | |
| CN106949814B (en) | Rapid assembling and adjusting device for precisely assembled bearing and using method | |
| CN109612615A (en) | The test device of automobile hub bearing load friction torque | |
| CN106015311A (en) | Center-adjustable ball spherical hinge joint and center adjusting method of center-adjustable ball spherical hinge joint | |
| CN110067811A (en) | A kind of air-float turntable | |
| CN109855868A (en) | A kind of bearing axial rigidity dynamic testing method and test equipment | |
| JP2019190864A (en) | Rotary table and roundness measuring machine | |
| CN104132886A (en) | Device for testing friction coefficient of precision bearing ball and cage pocket | |
| CN103615466B (en) | A kind of highi degree of accuracy air floating shaft system gas supply mechanism | |
| EP3379198B1 (en) | Method and system for detecting bend in rotating shaft of magnetic bearing | |
| CN114441168A (en) | Testing device and turbo expander | |
| CN106840672A (en) | Pairing bearing differential retainer dynamic property tester | |
| CN105605097A (en) | Mechanically-adjustable-clearance semi-active radial sliding bearing | |
| CN111458124B (en) | Plunger pump sliding shoe pair oil film lubrication characteristic test bed capable of controlling oil film clearance | |
| CN110333075A (en) | A kind of bearing life test device | |
| CN112483832A (en) | Rigid-flexible coupling ultra-precise double-shaft turntable | |
| CN205823908U (en) | A kind of ball ball pivot joint of adjusting center | |
| CN110261106A (en) | A kind of torque detecting apparatus of hub bearing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |