CN116659749A - Rotor balance detection device of three-phase asynchronous motor - Google Patents
Rotor balance detection device of three-phase asynchronous motor Download PDFInfo
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- CN116659749A CN116659749A CN202310916011.3A CN202310916011A CN116659749A CN 116659749 A CN116659749 A CN 116659749A CN 202310916011 A CN202310916011 A CN 202310916011A CN 116659749 A CN116659749 A CN 116659749A
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- 238000001514 detection method Methods 0.000 title claims abstract description 48
- 230000005540 biological transmission Effects 0.000 claims description 15
- 230000002457 bidirectional effect Effects 0.000 claims description 14
- 230000009191 jumping Effects 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining imbalance
- G01M1/16—Determining imbalance by oscillating or rotating the body to be tested
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/02—Details of balancing machines or devices
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Balance (AREA)
Abstract
The utility model discloses a rotor balance detection device of a three-phase asynchronous motor, which relates to the technical field of motor detection equipment and comprises a detection mechanism, wherein the detection mechanism comprises a main base, a pressure sensor is fixedly arranged on the main base, a lower guide wheel seat is fixedly arranged on the pressure sensor, a guide wheel is rotatably arranged on the lower guide wheel seat, a rotor is placed on the guide wheel, two end shafts of the rotor are matched with the guide wheel, a hydraulic cylinder is fixedly arranged on the main base, a clamping seat is fixedly arranged at the telescopic end of the hydraulic cylinder, a clamping plate is rotatably arranged on the clamping seat, an upper guide wheel seat is fixedly arranged on the clamping plate, a latch plate is slidably arranged on the clamping seat, a torsion spring is fixedly arranged on the clamping seat, and one end of the torsion spring is fixedly connected with the torsion spring. The utility model can be used for installing and fixing motor rotors with different sizes and performing dynamic balance detection.
Description
Technical Field
The utility model relates to the technical field of motor detection equipment, in particular to a rotor balance detection device of a three-phase asynchronous motor.
Background
Motors are one of the key components widely used in various industrial devices, and their development has been transformed from traditional mechanical structures to electronic and intelligent directions. However, the problem of rotor balancing remains a critical technical challenge during the production and maintenance of the motor. Because rotor imbalance can lead to motor vibration aggravation, noise increase, serious mechanical wear, shortened equipment life and other adverse consequences. Therefore, how to quickly and reliably locate the motor rotor balancing problem becomes an important task for motor manufacturing, service and maintenance workers. At present, some motor rotor balance detection devices exist in the market, and the balance condition of the rotor is detected mainly through vibration detection and other methods by the aid of the motor rotor balance detection devices in the market, but the motor rotor balance detection devices in the market are small in application range.
The Chinese patent with publication number of CN213397498U discloses a dynamic balance detection mechanism for a rotor of a three-phase asynchronous motor, which comprises a dynamic balance bottom sliding rail, wherein a motor rotor positioning plate is fixedly arranged on the dynamic balance bottom sliding rail, a rotary bearing riding wheel piece is fixedly arranged on the motor rotor positioning plate, and a middle wheel belt mounting plate is fixedly arranged between the two motor rotor positioning plates. Although the utility model can realize more accurate dynamic balance detection and reduce the runout of the rotor of the three-phase asynchronous motor, the detection mechanism is not convenient to feed, a winding belt needs to pass through the rotor, is relatively complex, and is not suitable for motor rotors with various sizes.
Disclosure of Invention
The utility model aims to provide a detection device capable of installing and fixing motor rotors with different sizes and performing dynamic balance detection.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a three-phase asynchronous motor's balanced detection device of rotor, including detection mechanism, detection mechanism includes total base, fixed mounting has pressure sensor on the total base, fixed mounting has lower guide pulley seat on the pressure sensor, rotate on the lower guide pulley seat and install the guide pulley, place the rotor on the guide pulley, the both ends axle of rotor forms the cooperation with the guide pulley, fixed mounting has the pneumatic cylinder on the total base, the telescopic end fixed mounting of pneumatic cylinder has the clamping seat, rotate on the clamping seat and install the clamping plate, fixed mounting has last guide pulley seat on the clamping plate, slidable mounting has the latch board on the clamping seat, fixed mounting has the torsional spring on the clamping seat, the one end and the torsional spring fixed connection of torsional spring, the other end and clamping plate fixed connection of torsional spring, fixed mounting has the bolt spring between latch board and the clamping seat, fixed mounting has the boss on the total base, fixed mounting has the boss on the boss and the cooperation of bolt plate.
Further, a jumping head is slidably arranged on the upper guide wheel seat, and a jumping spring is arranged between the jumping head and the upper guide wheel seat.
Further, balance detection device includes power unit, power unit includes the slide bar, slide bar fixed mounting is on total base, fixed mounting has the saddle on the slide bar, slidable mounting has the sliding seat on the slide bar, slidable mounting is on the saddle, fixed mounting has the slip cylinder on total base, fixed mounting has the connecting plate on the telescopic link of slip cylinder, fixed mounting has the wedge board on the connecting plate, wedge board and saddle fixed connection, fixed mounting has mobile motor on the saddle, fixed mounting has the power pulley on mobile motor's the output shaft, fixed mounting has the fixed band wheel frame on the saddle, fixed band wheel frame is last to rotate and is installed the fixed band wheel, fixed mounting has the band pulley spring on the saddle, the band pulley spring is arranged between saddle and fixed band wheel frame, rotatable mounting has interior supporting band pulley on the saddle, the power pulley, fixed band pulley, interior supporting band pulley, the drive belt has been arranged on the outer supporting band pulley, the drive belt, the drive pulley, fixed band, interior supporting band pulley, outer supporting band pulley, the drive belt forms the belt connection.
Further, the inner support pulley is disposed on the inner side of the transmission belt, the outer support pulley is disposed on the outer side of the transmission belt, and the rotor is disposed on the outer side of the transmission belt.
Further, the balance detection device comprises a locking mechanism, the locking mechanism comprises a locking bracket, a braking frame is fixedly arranged on the locking bracket, a bidirectional braking plate is rotatably arranged on the braking frame, and the bidirectional braking plate is matched with the sliding seat frame.
Further, a push plate is slidably arranged on the braking frame, a push plate spring is arranged between the push plate and the braking frame, a transverse moving plate is fixedly arranged on the push plate, a sliding groove is formed in the transverse moving plate, the transverse moving plate is slidably connected with the two-way braking plate, and a protruding rod of the two-way braking plate slides in the sliding groove of the transverse moving plate.
Further, the wedge plate is in engagement with the push plate.
Further, the wedge plate and the bi-directional brake plate are arranged in four sets on the slide mount.
Compared with the prior art, the utility model has the beneficial effects that: (1) According to the utility model, the motor rotor can be placed on the guide wheel, so that automatic clamping of the motor rotor is realized; (2) The utility model can be used for installing and fixing motor rotors with different sizes and performing dynamic balance detection; (3) The utility model is provided with the jumping head, so that radial circle jumping detection of the motor rotor can be realized; (4) The power mechanism can adjust the extension state of the transmission belt, and realize free transmission of the motor rotor.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
FIG. 2 is a schematic diagram of a detection mechanism according to the present utility model.
Fig. 3 is a schematic view of a part of the detection mechanism of the present utility model.
Fig. 4 is a schematic view of a power mechanism of the present utility model.
Fig. 5 is a schematic view of a carriage frame according to the present utility model.
Fig. 6 is a schematic diagram of a belt of the present utility model.
Fig. 7 is a schematic view of the locking mechanism of the present utility model.
Fig. 8 is a schematic view of a bi-directional brake plate of the present utility model.
Reference numerals: 1-a total base; 2-a pressure sensor; 3-a lower guide wheel seat; 4-a guide wheel; 5-rotor; 6-a hydraulic cylinder; 7, clamping the seat; 8-clamping plates; 9-upper guide wheel seat; 10-jumping heads; 11-jumping springs; 12-latch plate; 13-torsion springs; 14-a latch spring; 15-a boss base; 16-boss; 17-a slide bar; 18-a slide mount; 19-a sliding seat; 20-sliding cylinder; 21-connecting plates; 22-wedge plate; 23-a mobile motor; 24-a power wheel; 25-fixing the belt wheel frame; 26-a fixed pulley; 27-a pulley spring; 28-an inner support pulley; 29-an outer support pulley; 30-a transmission belt; 31-locking the bracket; 32-a brake frame; 33-pushing plate; 34-a push plate spring; 35-traversing plate; 36-bi-directional brake plate.
Detailed Description
The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.
Examples: the rotor balance detection device of the three-phase asynchronous motor comprises a detection mechanism, wherein the detection mechanism comprises a main base 1, a pressure sensor 2 is fixedly installed on the main base 1, a lower guide wheel seat 3 is fixedly installed on the pressure sensor 2, a guide wheel 4 is rotatably installed on the lower guide wheel seat 3, a rotor 5 is placed on the guide wheel 4, two end shafts of the rotor 5 are matched with the guide wheel 4, a hydraulic cylinder 6 is fixedly installed on the main base 1, a clamping seat 7 is fixedly installed at the telescopic end of the hydraulic cylinder 6, a clamping plate 8 is rotatably installed on the clamping seat 7, an upper guide wheel seat 9 is fixedly installed on the clamping plate 8, a latch plate 12 is slidably installed on the clamping seat 7, a torsion spring 13 is fixedly installed on one end of the torsion spring 13 and fixedly connected with the torsion spring 13, a latch spring 14 is fixedly installed between the latch plate 12 and the clamping seat 7, a boss 15 is fixedly installed on the main base 1, a boss 16 is fixedly installed on the boss seat 15, and the boss 16 is matched with the latch plate 12. Before detection, the rotor 5 needs to be placed between the four guide wheels 4, the hydraulic cylinder 6 is in an extension state initially, the hydraulic cylinder 6 extends to drive the clamping seat 7 to rise, the clamping seat 7 rises to the position of the boss 16, the bolt plate 12 is in contact with the boss 16, the bolt spring 14 extends, the clamping plate 8 is not clamped by the bolt plate 12, the rear end of the clamping plate 8 is in contact with the boss seat 15, the clamping plate 8 overturns on the clamping seat 7 and compresses the torsion spring 13, the clamping plate 8 is in a standing state, when the clamping plate 8 is in a standing state, the upper guide wheel seat 9 overturns upwards along with the clamping plate 8, the upper guide wheel seat 9 is not shielded by the upper guide wheel seat 9, the rotor 5 can be freely placed on the guide wheels 4, after the rotor 5 is placed, the hydraulic cylinder 6 retracts to drive the clamping seat 7 to descend, the clamping seat 7 drives the clamping plate 8 and the upper guide wheel seat 9 to descend, the upper guide wheel seat 9 is opposite to the rising of the clamping plate 8, the upper guide wheel seat 9 descends to the upper guide wheels 4 on the upper guide wheel seat 9 and the lower guide wheels 3 clamp the rotor 5 under the action of the torsion spring 13. The rotor 5 rotates between the guide wheels 4, and the acting force of the rotation of the rotor 5 on the guide wheels 4 is detected through the pressure sensor 2, so that the detection of the rotor 5 is realized.
The upper guide wheel seat 9 is provided with a jumping head 10 in a sliding manner, and a jumping spring 11 is arranged between the jumping head 10 and the upper guide wheel seat 9. The lower surface of the runout head 10 is in contact with two ends of the rotor 5, and the runout head 10 performs radial circle runout detection on the rotor 5.
The balance detection device comprises a power mechanism, the power mechanism comprises a slide rod 17, the slide rod 17 is fixedly arranged on a total base 1, a slide seat frame 18 is fixedly arranged on the slide rod 17, a slide seat 19 is slidably arranged on the slide seat frame 18, a slide cylinder 20 is fixedly arranged on the total base 1, a connecting plate 21 is fixedly arranged on a telescopic rod of the slide cylinder 20, a wedge block plate 22 is fixedly arranged on the connecting plate 21, the wedge block plate 22 is fixedly connected with the slide seat 19, a movable motor 23 is fixedly arranged on the slide seat 19, a power wheel 24 is fixedly arranged on an output shaft of the movable motor 23, a fixed belt wheel frame 25 is fixedly arranged on the slide seat frame 18, a fixed belt wheel 26 is rotatably arranged on the fixed belt wheel frame 25, a belt wheel spring 27 is fixedly arranged on the slide seat frame 18, a belt wheel spring 27 is arranged between the slide seat 19 and the fixed belt wheel frame 25, an inner support belt wheel 28 is rotatably arranged on the slide seat 19, an outer support belt wheel 29 is rotatably arranged on the slide seat 19, a power wheel 24, a fixed belt wheel 26, an inner support belt 30 is arranged on the outer support belt wheel 29, a power belt 24, a fixed belt support belt 26 is fixedly arranged on the outer support belt wheel 29, and the power belt wheels 24, the fixed belt support belt wheels 26, the fixed belt support belt wheels 29 are fixedly connected with the inner support belt wheels 29, and the fixed belt wheels 28. The moving motor 23 is started to drive the power wheel 24 to rotate, the power wheel 24 drives the inner supporting belt pulley 28, the outer supporting belt pulley 29 and the fixed belt pulley 26 to rotate, the transmission belt 30 is in contact with the surface of the rotor 5, the rotor 5 is limited by the guide wheel 4, the transmission belt 30 drives the rotor 5 to rotate during movement, and the transmission belt 30 is a flexible belt, so that the transmission belt 30 can drive the rotors 5 with any different diameters to rotate.
The inner support pulley 28 is arranged inside the drive belt 30, the outer support pulley 29 is arranged outside the drive belt 30, and the rotor 5 is arranged outside the drive belt 30. For the convenience of better laminating of the driving belt 30 on the surface of the rotor 5, the driving belt 30 should have an adaptive tensioning function, the sliding cylinder 20 is started, the sliding cylinder 20 drives the connecting plate 21 to move, the connecting plate 21 drives the wedge block plate 22 to move, the wedge block plate 22 drives the sliding seat 19 to move on the sliding seat frame 18, the sliding seat 19 moves to drive the power wheel 24, the inner supporting belt wheel 28 and the outer supporting belt wheel 29 to move, the position of the fixed belt wheel 26 is unchanged, the distance between the inner supporting belt wheel 28 and the fixed belt wheel 26 is increased, and the driving belt 30 is stretched until the driving belt 30 is stretched to a state adapting to the rotor 5.
The balance detection device comprises a locking mechanism, the locking mechanism comprises a locking bracket 31, a braking frame 32 is fixedly arranged on the locking bracket 31, a bidirectional braking plate 36 is rotatably arranged on the braking frame 32, and the bidirectional braking plate 36 is matched with the sliding seat frame 18. When the bidirectional brake plate 36 rotates on the brake frame 32 to be in contact with the slide frame 18, the inclined surface of the bidirectional brake plate 36 is in contact with the slide frame 18 to prevent the slide seat 19 from moving continuously, so that the limit of the power mechanism is realized, and the stable detection process is ensured.
The braking frame 32 is provided with a pushing plate 33 in a sliding manner, a pushing plate spring 34 is arranged between the pushing plate 33 and the braking frame 32, the pushing plate 33 is fixedly provided with a transverse moving plate 35, the transverse moving plate 35 is provided with a sliding groove, the transverse moving plate 35 is connected with a bidirectional braking plate 36 in a sliding manner, and a convex rod of the bidirectional braking plate 36 slides in the sliding groove of the transverse moving plate 35. The push plate 33 is extruded, the push plate 33 drives the transverse moving plate 35 to move, the transverse moving plate 35 drives the bidirectional braking plate 36 to rotate, and the bidirectional braking plate 36 limits the sliding seat 19.
Wedge plate 22 is in engagement with push plate 33. When the wedge block plate 22 moves to drive the sliding seat 19 to move, the inclined surface of the wedge block plate 22 is simultaneously contacted with the push plate 33, and the inclined surface of the wedge block plate 22 drives the push plate 33 to slide on the braking frame 32, so that automatic control of the locking mechanism is realized.
The wedge plate 22 and the bi-directional brake plate 36 are arranged in four groups on the slide 19. The four sets of wedge plates 22 and bi-directional brake plates 36 ensure locking stability.
Claims (8)
1. The utility model provides a three-phase asynchronous motor's rotor balance detection device, includes detection mechanism, its characterized in that: the detection mechanism comprises a main base (1), a pressure sensor (2) is fixedly arranged on the main base (1), a lower guide wheel seat (3) is fixedly arranged on the pressure sensor (2), a guide wheel (4) is rotatably arranged on the lower guide wheel seat (3), a rotor (5) is arranged on the guide wheel (4), two end shafts of the rotor (5) are matched with the guide wheel (4), a hydraulic cylinder (6) is fixedly arranged on the main base (1), a clamping seat (7) is fixedly arranged at the telescopic end of the hydraulic cylinder (6), a clamping plate (8) is rotatably arranged on the clamping seat (7), a latch plate (12) is fixedly arranged on the clamping plate (8), a torsion spring (13) is fixedly arranged on the clamping seat (7), one end of the torsion spring (13) is fixedly connected with the torsion spring (13), the other end of the torsion spring (13) is fixedly connected with the clamping plate (8), a latch spring (14) is fixedly arranged between the latch plate (12) and the clamping seat (7), a boss (16) is fixedly arranged on the main base (1), and a boss (15) is matched with the boss (16).
2. The rotor balance detection apparatus for a three-phase asynchronous motor according to claim 1, wherein: the upper guide wheel seat (9) is provided with a jumping head (10) in a sliding manner, and a jumping spring (11) is arranged between the jumping head (10) and the upper guide wheel seat (9).
3. The rotor balance detection apparatus of a three-phase asynchronous motor according to claim 2, wherein: the balance detection device comprises a power mechanism, the power mechanism comprises a slide seat rod (17), the slide seat rod (17) is fixedly arranged on a main base (1), a slide seat frame (18) is fixedly arranged on the slide seat rod (17), a slide seat (19) is slidably arranged on the slide seat rod (17), a slide cylinder (20) is fixedly arranged on the main base (1), a connecting plate (21) is fixedly arranged on a telescopic rod of the slide cylinder (20), a wedge block plate (22) is fixedly arranged on the connecting plate (21), the wedge block plate (22) is fixedly connected with the slide seat (19), a movable motor (23) is fixedly arranged on the sliding seat (19), a power wheel (24) is fixedly arranged on an output shaft of the movable motor (23), a fixed belt wheel frame (25) is fixedly arranged on the sliding seat frame (18), a fixed belt wheel (26) is rotatably arranged on the fixed belt wheel frame (25), a belt wheel spring (27) is fixedly arranged on the sliding seat frame (18), an inner supporting belt wheel (28) is rotatably arranged on the sliding seat (19), an outer supporting belt wheel (29) is rotatably arranged on the sliding seat (19), a power wheel (24), a fixed belt wheel (26), a belt wheel (26), and the inner support belt wheel (28) and the outer support belt wheel (29) are provided with a transmission belt (30), and the power wheel (24), the fixed belt wheel (26), the inner support belt wheel (28), the outer support belt wheel (29) and the transmission belt (30) form belt connection.
4. A rotor balance detection apparatus for a three-phase asynchronous motor according to claim 3, wherein: the inner support pulley (28) is arranged on the inner side of the transmission belt (30), the outer support pulley (29) is arranged on the outer side of the transmission belt (30), and the rotor (5) is arranged on the outer side of the transmission belt (30).
5. The rotor balance detection apparatus for a three-phase asynchronous motor according to claim 4, wherein: the balance detection device comprises a locking mechanism, the locking mechanism comprises a locking bracket (31), a braking frame (32) is fixedly arranged on the locking bracket (31), a bidirectional braking plate (36) is rotatably arranged on the braking frame (32), and the bidirectional braking plate (36) is matched with the sliding seat frame (18).
6. The rotor balance detection apparatus for a three-phase asynchronous motor according to claim 5, wherein: the braking frame (32) is provided with a pushing plate (33) in a sliding manner, a pushing plate spring (34) is arranged between the pushing plate (33) and the braking frame (32), the pushing plate (33) is fixedly provided with a transverse moving plate (35), the transverse moving plate (35) is provided with a sliding groove, the transverse moving plate (35) is in sliding connection with a bidirectional braking plate (36), and a protruding rod of the bidirectional braking plate (36) slides in the sliding groove of the transverse moving plate (35).
7. The rotor balance detection apparatus for a three-phase asynchronous motor according to claim 6, wherein: the wedge block plate (22) is matched with the push plate (33).
8. The rotor balance detection apparatus for a three-phase asynchronous motor according to claim 7, wherein: the wedge plate (22) and the bi-directional brake plate (36) are arranged in four groups on the slide seat (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310916011.3A CN116659749B (en) | 2023-07-25 | 2023-07-25 | Rotor balance detection device of three-phase asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310916011.3A CN116659749B (en) | 2023-07-25 | 2023-07-25 | Rotor balance detection device of three-phase asynchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116659749A true CN116659749A (en) | 2023-08-29 |
| CN116659749B CN116659749B (en) | 2023-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310916011.3A Active CN116659749B (en) | 2023-07-25 | 2023-07-25 | Rotor balance detection device of three-phase asynchronous motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN116659749B (en) |
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|---|---|---|---|---|
| KR20010010811A (en) * | 1999-07-23 | 2001-02-15 | 박노길 | Balancing machine for rotor and method therefor |
| US20150345294A1 (en) * | 2014-05-29 | 2015-12-03 | Pratt & Whitney Canada Corp. | Method of balancing a spool of a gas turbine engine |
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| CN208825761U (en) * | 2018-09-20 | 2019-05-07 | 苏州艾曼达精密机械有限公司 | A kind of vertical fixture for processing of wind turbine gearbox gear ring |
| CN113042469A (en) * | 2021-03-29 | 2021-06-29 | 安徽医科大学第二附属医院 | Suspended sputum suction and flushing device and using method thereof |
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-
2023
- 2023-07-25 CN CN202310916011.3A patent/CN116659749B/en active Active
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|---|---|---|---|---|
| KR20010010811A (en) * | 1999-07-23 | 2001-02-15 | 박노길 | Balancing machine for rotor and method therefor |
| US20150345294A1 (en) * | 2014-05-29 | 2015-12-03 | Pratt & Whitney Canada Corp. | Method of balancing a spool of a gas turbine engine |
| CN106870634A (en) * | 2015-12-10 | 2017-06-20 | 斯凯孚磁浮机电有限公司 | For the balance method of the rotor of balance rotating machine at high speeds |
| CN207779615U (en) * | 2017-12-18 | 2018-08-28 | 杨明明 | A kind of rotor dynamic balance testing machine |
| CN208825761U (en) * | 2018-09-20 | 2019-05-07 | 苏州艾曼达精密机械有限公司 | A kind of vertical fixture for processing of wind turbine gearbox gear ring |
| CN109655203A (en) * | 2018-12-24 | 2019-04-19 | 燕山大学 | Balancing machine assists bolt angle locater |
| CN113042469A (en) * | 2021-03-29 | 2021-06-29 | 安徽医科大学第二附属医院 | Suspended sputum suction and flushing device and using method thereof |
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| CN116659749B (en) | 2023-10-03 |
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