CN112412994A - High-rotating-speed small-torque star-shaped vibration isolation coupling - Google Patents
High-rotating-speed small-torque star-shaped vibration isolation coupling Download PDFInfo
- Publication number
- CN112412994A CN112412994A CN202011500928.8A CN202011500928A CN112412994A CN 112412994 A CN112412994 A CN 112412994A CN 202011500928 A CN202011500928 A CN 202011500928A CN 112412994 A CN112412994 A CN 112412994A
- Authority
- CN
- China
- Prior art keywords
- star
- shaft body
- tension
- pulling force
- shaped shaft
- 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
- 230000008878 coupling Effects 0.000 title claims abstract description 26
- 238000010168 coupling process Methods 0.000 title claims abstract description 26
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 26
- 238000002955 isolation Methods 0.000 title claims abstract description 26
- 241000555745 Sciuridae Species 0.000 claims abstract description 10
- 239000004677 Nylon Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036544 posture Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
- F16D3/52—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising a continuous strip, spring, or the like engaging the coupling parts at a number of places
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
- F16D3/56—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising elastic metal lamellae, elastic rods, or the like, e.g. arranged radially or parallel to the axis, the members being shear-loaded collectively by the total load
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention relates to a coupler for high-rotating-speed precision rotating machinery, in particular to a high-rotating-speed small-torque star-shaped vibration isolation coupler, which comprises a driving shaft end coupling body and a driven shaft end coupling body, and is technically characterized in that: the driving shaft end connecting body is composed of a flange plate I and a squirrel cage-shaped shaft body connected with the flange plate I, the driven shaft end connecting body is composed of a flange plate II and a star-shaped shaft body connected with the flange plate II, the star-shaped shaft body is inserted into the squirrel cage-shaped shaft body, at least one group of tensile wires with ductility is connected between the star-shaped shaft body and the squirrel cage-shaped shaft body, and each group of tensile wires is composed of a plurality of tensile wires which are symmetrically distributed along the circumferential direction of the star-shaped shaft body. The vibration isolation and reduction coupling has the advantages that the structure is compact, the use is reliable, the problem that the vibration isolation or reduction effect is poor when the existing coupling is applied to high-rotating-speed precise rotating machinery is solved, the influence of shaft end flutter of a driving shaft system on a driven shaft system is effectively reduced, and the operation noise is low.
Description
Technical Field
The invention relates to a coupler for a high-rotating-speed precision rotating machine, in particular to a high-rotating-speed small-torque star-shaped vibration isolation coupler.
Background
In the process of high-rotating-speed precision rotating machinery test research and long-time operation, for example: the influence of clearance change between rotating and static parts and shafting vibration on performance indexes and strength service life is huge in part tests of aeroengines, operation of high-speed slip ring power guides and the like, the superposition effect of inherent play of bearings of all supporting points of a driving shafting and centering deviation between shafts often causes obvious shaft end flutter of the driving shafting in a high-rotating-speed operation state of ten thousand revolutions per minute level, and the isolation or reduction of the shaft end flutter of the high-speed driving shafting has great practical significance on the performance and service life of high-rotating-speed precise rotating machinery.
Currently, the existing couplings in the market are various in types and mainly divided into rigid couplings and elastic couplings. In terms of function, rigid type couplings are not suitable for machines with strict centering requirements; the tire coupler and the diaphragm coupler in the elastic coupler can reduce shaft end flutter to a certain extent, but elastic materials of tire coupler series or similar structures can move outwards along a radius under high-speed rotating centrifugal force to generate pulling force for pulling a driven shaft end, the component force of the pulling force in the axis direction can apply extra axial force to high-speed precision rotating machinery, and the field operation noise of the coupler is very large; although the diaphragm coupling does not generate extra axial force at high rotating speed unlike a tire coupling series, and does not generate obvious noise, the vibration isolation or reduction effect on the operation of high-rotating-speed precision rotating machinery is limited, and a good effect cannot be achieved.
Disclosure of Invention
The invention aims to provide a high-rotating-speed and small-torque star-shaped vibration isolation coupler which is compact in structure and reliable to use, solves the problem that the vibration isolation or reduction effect is poor when the existing coupler is applied to high-rotating-speed precise rotating machinery, effectively reduces the influence of shaft end flutter of a driving shaft system on a driven shaft system, and is low in operation noise.
The technical scheme of the invention is as follows:
the utility model provides a star vibration isolation shaft coupling of high rotational speed small torque, includes that initiative axle head connects the body and the driven axle head connects the body, and its technical essential is: the driving shaft end connecting body is composed of a flange plate I and a squirrel cage-shaped shaft body connected with the flange plate I, the driven shaft end connecting body is composed of a flange plate II and a star-shaped shaft body connected with the flange plate II, the star-shaped shaft body is inserted into the squirrel cage-shaped shaft body, at least one group of tensile wires with ductility is connected between the star-shaped shaft body and the squirrel cage-shaped shaft body, and each group of tensile wires is composed of a plurality of tensile wires which are symmetrically distributed along the circumferential direction of the star-shaped shaft body.
In the high-rotating-speed small-torque star vibration isolation coupler, at least two groups of tension lines are arranged, and the tension lines of each group are distributed at intervals along the axial direction of the star shaft body.
The squirrel-cage-shaped shaft body comprises a plurality of axial tension beams which are uniformly distributed and circumferential bearing beams connected among the axial tension beams, each axial tension beam is provided with at least one tension hole I connected with a tension line, the number of the tension holes I on each axial tension beam is the same as the number of the tension lines and is distributed at intervals along the length direction of the axial tension beam, and the number of the axial tension beams is equal to the number of the tension lines in each group of the tension lines.
The star-shaped vibration isolation coupler with the high rotating speed and the small torque comprises a hollow shaft body and a plurality of axial tension ridges arranged on the outer peripheral surface of the hollow shaft body, wherein each axial tension ridge is provided with at least one tension hole II connected with a tension line, the number of the tension holes II on each axial tension ridge is the same as the number of the tension lines and is distributed at intervals along the length direction of the axial tension ridge, and the number of the axial tension ridges is equal to the number of the tension lines in each group of the tension lines. Wherein, the hollow shaft body is convenient for the walking line of the rotating part test wire, the installation of the test signal wireless transmitter, etc.
In the high-rotating-speed low-torque star-shaped vibration isolation coupler, the axis line of the tension hole I connected with the tension line on the squirrel-cage-shaped shaft body is superposed with the normal line of the shaft body where the tension hole I is located.
According to the high-rotating-speed small-torque star-shaped vibration isolation coupler, the axis line of the tension hole II connected with the tension line on the star-shaped shaft body coincides with the tangent line of the shaft body where the star-shaped shaft body is located.
In the high-rotating-speed and small-torque star-shaped vibration isolation coupler, the tension line is a nylon wire or a steel wire rope.
In the high-rotating-speed small-torque star-shaped vibration isolation coupler, the cross section of the star-shaped shaft body is in a six-star shape, and 6 axial tension ridges are uniformly distributed on the periphery of the hollow shaft body.
The invention has the beneficial effects that:
1. the invention adopts a high-strength tension line group with certain ductility to be connected between the squirrel-cage-shaped shaft body of the driving shaft end connecting body and the star-shaped shaft body of the driven shaft end connecting body, so that the torque of the squirrel-cage-shaped shaft body is converted into the tension of the tension line, the radial position of the star-shaped shaft body is pulled, and the tangential component of the tension at the radial position of the star-shaped shaft body and the radius of the star-shaped shaft body form a rotating moment, thereby achieving the purpose of driving the star. The invention effectively transmits torque under the condition that the driving shaft system and the driven shaft system are not aligned, and simultaneously effectively reduces the influence of the flutter of the driving shaft system on the driven shaft system through the tension line, thereby greatly reducing the operation noise.
2. The invention adopts a mouse cage-shaped structure formed by the mouse cage-shaped shaft body and the star-shaped shaft body, has compact structure, is beneficial to observation and convenient to install and disassemble, does not influence the centering operation of the driving shaft system and the driven shaft system under the condition of needing to be installed in advance, and can also be completely disassembled under the condition of not changing the space installation postures of the driving shaft system and the driven shaft system.
3. The main body of the invention has long service life, the tension wire is directly maintained through the cage-shaped structure of the mouse, the replacement is convenient, and the maintenance efficiency is greatly improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a right side view of FIG. 1;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 4 is a schematic structural view of the driven shaft end coupling body of the present invention;
FIG. 5 is a sectional view taken along line B-B of FIG. 4;
FIG. 6 is a cross-sectional view taken along line C-C of FIG. 5;
FIG. 7 is an enlarged view of portion D of FIG. 6;
FIG. 8 is a schematic structural view of the active shaft end coupling body of the present invention;
FIG. 9 is a cross-sectional view taken along line E-E of FIG. 8;
FIG. 10 is a sectional view taken along line F-F of FIG. 9;
fig. 11 is a sectional view taken along line G-G in fig. 9.
In the figure: 1. the driving shaft comprises a driving shaft end connecting body, 101, flange plates I and 102, a squirrel cage-shaped shaft body, 103, an axial tension beam, 104, a circumferential bearing beam and 105, a tension hole I; 2. the driven shaft end connecting body, 201, flanges II, 202, a star-shaped shaft body, 203, a hollow shaft body, 204, an axial tension ridge, 205 and a tension hole II; 3. and (4) pulling the force line.
Detailed Description
As shown in figures 1-3, the high-rotating-speed small-torque star vibration isolation coupling comprises a driving shaft end coupling body 1 and a driven shaft end coupling body 2. The driving shaft end connecting body 1 is composed of a flange plate I101 and a squirrel-cage-shaped shaft body 102 connected with the flange plate I101, the driven shaft end connecting body 2 is composed of a flange plate II 201 and a star-shaped shaft body 202 connected with the flange plate II 201, the star-shaped shaft body 202 is inserted into the squirrel-cage-shaped shaft body 102, at least one group of tensile wires 3 with ductility is connected between the star-shaped shaft body 202 and the squirrel-cage-shaped shaft body 102, and each group of tensile wires 3 is composed of a plurality of tensile wires which are symmetrically distributed along the circumferential direction of the star-shaped shaft body 202. In this embodiment, the tension lines 3 are three groups, each group of tension lines is axially distributed at intervals along the star-shaped shaft body, and each group of tension lines is composed of 6 tension lines. The tension line 3 is a high-strength tension line with ductility, such as a nylon line or a steel wire rope, and the nylon line is adopted in the embodiment.
Referring to fig. 8-11, the squirrel-cage-shaped shaft body 102 includes a plurality of axial tension beams 103 uniformly distributed, and circumferential load-bearing beams 104 connected between the axial tension beams 103, each axial tension beam 103 is provided with at least one tension hole i 105 connected with a tension line 3, the number of the tension holes i 105 on each axial tension beam is the same as the number of groups of the tension lines 3 and is distributed at intervals along the length direction of the axial tension beam, and the number of the axial tension beams 103 is the same as the number of the tension lines in each group of the tension lines 3. In this embodiment, the squirrel-cage shaft body 102 is uniformly provided with 6 axial tension beams 103, each axial tension beam 103 is provided with 3 tension holes i 105, and the axial line of each tension hole i 105 coincides with the normal of the shaft body where the tension hole i 105 is located.
Referring to fig. 4 to 7, the star-shaped shaft body 202 includes a hollow shaft body 203 and a plurality of axial tension ridges 204 disposed on the outer circumferential surface of the hollow shaft body 203, each axial tension ridge 204 is provided with at least one tension hole ii 205 connected to the tension wire 3, the number of the tension holes ii 205 on each axial tension ridge is the same as the number of the tension wires 3 and is distributed at intervals along the length direction of the axial tension ridge, and the number of the axial tension ridges 204 is the same as the number of the tension wires in each group of the tension wires 3. The hollow shaft body 203 facilitates wiring of a test line of the rotating part, installation of a wireless transmitter of a test signal and the like. In this embodiment, 6 axial tension ridges 204 are uniformly arranged on the periphery of the hollow shaft body 203 of the star-shaped shaft body, the cross section of the star-shaped shaft body is in a six-mango star shape, each axial tension ridge 204 is provided with 3 tension holes ii 205, and the axial line of each tension hole ii 205 coincides with the tangent line of the shaft body where the tension hole is located.
During installation, one end of the tension wire 3 is installed in a tension hole II 205 on an axial tension ridge of the star-shaped shaft body, the other end of the tension wire 3 is installed in a tension hole I105 on an axial tension beam of the corresponding squirrel-cage-shaped shaft body, then the star-shaped shaft body 202 is inserted into the squirrel-cage-shaped shaft body 102, centering operation is carried out on a shafting, and then the tension wire 3 is straightened and fixed. If the centering deviation exists between the squirrel-cage-shaped shaft body 102 and the star-shaped shaft body 202, the three degree of freedom deviations including vertical, horizontal and angular deviations are eliminated by the length matching of the tension wire 3 and the ductility of the tension wire, namely, the invention can effectively transmit torque under the condition that the shaft system is not centered, and the influence of the vibration of the shaft system at the end of the squirrel-cage-shaped shaft body on the shaft system at the end of the star-shaped shaft body is reduced to the maximum extent by the ductility of the tension wire.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the invention are also within the scope of the present patent.
Claims (8)
1. The utility model provides a star vibration isolation shaft coupling of high rotational speed small torque, includes that initiative axle head connects the body and the driven axle head connects the body, its characterized in that: the driving shaft end connecting body is composed of a flange plate I and a squirrel cage-shaped shaft body connected with the flange plate I, the driven shaft end connecting body is composed of a flange plate II and a star-shaped shaft body connected with the flange plate II, the star-shaped shaft body is inserted into the squirrel cage-shaped shaft body, at least one group of tensile wires with ductility is connected between the star-shaped shaft body and the squirrel cage-shaped shaft body, and each group of tensile wires is composed of a plurality of tensile wires which are symmetrically distributed along the circumferential direction of the star-shaped shaft body.
2. The high-speed low-torque star vibration isolation coupling according to claim 1, wherein: the pulling force lines are at least two groups, and the pulling force lines of each group are distributed at intervals along the axial direction of the star-shaped shaft body.
3. The high-speed low-torque star vibration isolation coupling according to claim 1, wherein: the squirrel-cage-shaped shaft body comprises a plurality of axial tension beams which are uniformly distributed and circumferential bearing beams which are connected among the axial tension beams, each axial tension beam is provided with at least one tension hole I which is connected with a tension line, the number of the tension holes I on each axial tension beam is the same as the group number of the tension lines and is distributed at intervals along the length direction of the axial tension beam, and the number of the axial tension beams is equal to the number of the tension lines in each group of the tension lines.
4. The high-speed low-torque star vibration isolation coupling according to claim 1, wherein: the star axis body includes the hollow shaft body, locates a plurality of axial pulling force banks of hollow shaft body outer peripheral face and constitutes, and every axial pulling force bank is equipped with at least one pulling force hole II of being connected with the pulling force line, and the quantity of pulling force hole II is the same with the group number of pulling force line and along axial pulling force bank length direction interval distribution on every axial pulling force bank, the quantity of axial pulling force bank equals with the quantity of pulling force line in every group pulling force line.
5. The high-speed low-torque star vibration isolation coupling according to claim 1, wherein: the axis line of a tension hole I which is connected with a tension line on the squirrel-cage-shaped shaft body is superposed with the normal line of the position of the shaft body.
6. The high-speed low-torque star vibration isolation coupling according to claim 1, wherein: the axis line of the pulling force hole II connected with the pulling force line on the star-shaped shaft body is superposed with the tangent line of the shaft body where the pulling force hole II is located.
7. The high-speed low-torque star vibration isolation coupling according to claim 1, wherein: the tension line is a nylon wire or a steel wire rope.
8. The high-speed low-torque star vibration isolation coupling of claim 4, wherein: the cross section of star axis body is six awn star-shaped, and its hollow shaft body periphery evenly distributed 6 axial pulling force ridges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011500928.8A CN112412994A (en) | 2020-12-18 | 2020-12-18 | High-rotating-speed small-torque star-shaped vibration isolation coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011500928.8A CN112412994A (en) | 2020-12-18 | 2020-12-18 | High-rotating-speed small-torque star-shaped vibration isolation coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112412994A true CN112412994A (en) | 2021-02-26 |
Family
ID=74782419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011500928.8A Pending CN112412994A (en) | 2020-12-18 | 2020-12-18 | High-rotating-speed small-torque star-shaped vibration isolation coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112412994A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0175020A1 (en) * | 1984-09-13 | 1986-03-26 | Csepel Autogyár | Clutch friction disc, particularly for motor vehicles |
| CN201843914U (en) * | 2010-11-12 | 2011-05-25 | 西南石油大学 | Viscous shaft coupling for outer shaft |
| WO2014185778A1 (en) * | 2013-05-15 | 2014-11-20 | Humen, Technology And Business B.V. | Flexible coupling having a torque transmission structure comprising an arrangement of fiber strands |
| CN108194528A (en) * | 2018-01-12 | 2018-06-22 | 湖北汽车工业学院 | A kind of wire line thimble shaft coupling and assembly method |
| CN214331254U (en) * | 2020-12-18 | 2021-10-01 | 沈阳航燃科技有限公司 | High-rotating-speed small-torque star-shaped vibration isolation coupling |
-
2020
- 2020-12-18 CN CN202011500928.8A patent/CN112412994A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0175020A1 (en) * | 1984-09-13 | 1986-03-26 | Csepel Autogyár | Clutch friction disc, particularly for motor vehicles |
| CN201843914U (en) * | 2010-11-12 | 2011-05-25 | 西南石油大学 | Viscous shaft coupling for outer shaft |
| WO2014185778A1 (en) * | 2013-05-15 | 2014-11-20 | Humen, Technology And Business B.V. | Flexible coupling having a torque transmission structure comprising an arrangement of fiber strands |
| CN108194528A (en) * | 2018-01-12 | 2018-06-22 | 湖北汽车工业学院 | A kind of wire line thimble shaft coupling and assembly method |
| CN214331254U (en) * | 2020-12-18 | 2021-10-01 | 沈阳航燃科技有限公司 | High-rotating-speed small-torque star-shaped vibration isolation coupling |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101595299A (en) | Wind turbine is used to keep in repair the method and the use thereof of the main bearing unit of wind turbine | |
| CN214331254U (en) | High-rotating-speed small-torque star-shaped vibration isolation coupling | |
| CN105570410A (en) | Multi-line planetary traction and transmission type speed reducing bearing | |
| CN102537033A (en) | Bearings having radial half cage | |
| CN212454708U (en) | Single-bearing transmission system connecting structure of wind generating set | |
| AU2018381708A1 (en) | Cutting unit of shearer, provided with double-speed rollers | |
| CN112412994A (en) | High-rotating-speed small-torque star-shaped vibration isolation coupling | |
| CN215927661U (en) | Gear box input shaft of wind generating set | |
| CN110360066B (en) | Sliding main bearing drive chain and wind turbine comprising same | |
| CN202520805U (en) | Coupler with nylon ropes | |
| CN219755149U (en) | Fan coupling device | |
| CN201326518Y (en) | Main shaft supporting mechanism of wind turbine using double-row back-to-back bearing | |
| CN207005109U (en) | A kind of new easy-to-mount shaft coupling | |
| CN2158009Y (en) | Improved drive of electric-motor and pump | |
| CN106763264B (en) | Metal disc-folding flexible coupling | |
| CN110630445A (en) | Permanent magnet direct-drive wind driven generator and assembly method thereof | |
| CN201428752Y (en) | Cross bun with barrel-type roller bearing | |
| CN215065260U (en) | Pull ring type coupler for engine test | |
| CN221195792U (en) | Reel coupler | |
| CN221292787U (en) | Universal wheel mechanism | |
| CN215293323U (en) | Flexible connecting device for coupling connection | |
| CN113202875A (en) | Novel coupler | |
| CN209756641U (en) | Promote wheel hub structure of carbon-free dolly transmission efficiency | |
| CN221221194U (en) | Coupling for new energy motor test bench | |
| CN219932770U (en) | Ultrahigh-speed overload protection film disc flexible coupling |
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 |