CN106931882B - Detection device and detection method for buffering and damping piece of impeller rotating part - Google Patents
Detection device and detection method for buffering and damping piece of impeller rotating part Download PDFInfo
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- CN106931882B CN106931882B CN201710168269.4A CN201710168269A CN106931882B CN 106931882 B CN106931882 B CN 106931882B CN 201710168269 A CN201710168269 A CN 201710168269A CN 106931882 B CN106931882 B CN 106931882B
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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Abstract
The invention discloses a detection device and a detection method for a buffer damping piece of an impeller rotating part, wherein the detection device for the buffer damping piece comprises a rack, a fixing part, a rotating moment providing part, a collecting part and a judging device, wherein the fixing part is used for positioning the impeller rotating part and fixing a rotating body of the impeller rotating part, the rotating moment providing part is used for being connected with an impeller of the impeller rotating part positioned on the fixing part and providing fixed rotating moment of the impeller, the collecting part is used for collecting rotating position change information of the impeller from the beginning to the rotation stop under the action of the fixed rotating moment, and the judging device is connected with the collecting part and obtains the information whether the buffer damping piece exists in the impeller rotating part according to the rotating position change information of the impeller sent by the collecting part. The invention can detect whether the buffering and damping piece in the impeller rotating part is assembled in place.
Description
Technical Field
The invention relates to a detection device and a detection method for a buffering and damping piece of an impeller rotating part.
Background
Currently, as shown in fig. 1 to 3, an impeller rotating part is provided, which includes: the impeller 10, the rotating shaft 20, the rotating body 30, the coupler 40, the buffering shock-absorbing part 50 and the sealing element 60, the impeller 10 and the rotating shaft 20 are integrally and fixedly installed, the coupler 40 is installed and fixed at the other end of the rotating shaft 20, the rotating body 30 with the rotating boss 301 is driven to rotate through the abutting joint of the coupler 40 and the buffering shock-absorbing part 50, the elastic rotation starting of an impeller rotating part is realized, the buffering shock-absorbing part 50 is adopted in the impeller rotating part, the main purpose is that the buffering shock-absorbing part 50 can prevent the coupler 40 and the rotating body 30 from being directly and rigidly started when the impeller rotating part is started, the flexible starting effect is achieved, and meanwhile, when the impeller rotating part normally runs for a long time, the buffering shock-absorbing part 50 can better achieve the functions of absorbing, buffering and reducing noise; in the automatic line assembly process, the buffering and damping part 50 assembled inside the original impeller rotating part adopts CCD images to detect whether the buffering and damping part 50 inside the original impeller rotating part is assembled or not; however, in the process of assembling the automatic line, the problems that the machine running speed is too high and a certain response time is needed for shooting by a CCD camera exist, the impeller rotating parts in the process of assembling the CCD camera in a missing shooting part often exist, and the missing shooting phenomenon is more serious along with the increase of the production speed of the automatic line; therefore, a buffer damper detection device is needed to perform sampling detection on the impeller rotating parts so as to determine whether the buffer dampers 50 in the batch of impeller rotating parts are installed in place or whether the buffer dampers 50 meet the requirements of actual rotating assemblies during operation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a buffer damping piece detection device for an impeller rotating part, which can detect whether a buffer damping piece in the impeller rotating part is assembled in place or not.
In order to solve the technical problem, the technical scheme of the invention is as follows: a cushion damper detection apparatus for a rotary member of an impeller, comprising:
a frame;
a fixed member for positioning the impeller rotating member and limiting rotation of the rotating body of the impeller rotating member;
a rotation torque providing member for being connected to the impeller of the impeller rotating member positioned on the fixed member and providing an impeller fixing rotation torque;
the acquisition component is used for acquiring the rotation position change information of the impeller from the beginning to the rotation stop under the action of the fixed rotation torque;
and the judging device is connected with the acquisition component and is used for obtaining the information of whether the buffering and damping part exists in the rotating component of the impeller according to the rotating position change information of the impeller sent by the acquisition component.
Further provided is a concrete structure of fixed part to impeller rotary part's rotatory body pivoted is prescribed a position to convenience and inject impeller rotary part's rotatory body, fixed part includes at least a set of clamping part, and every group clamping part includes two centre gripping subassemblies, the centre gripping subassembly includes grip block and grip block driving piece, the grip block driving piece links to each other with corresponding grip block respectively, so that the corresponding grip block action of grip block driving piece drive makes two grip blocks in the same group of clamping part do the relative motion and support on rotatory body or do the motion dorsad and leave rotatory body.
Further for the rotatory body of better location impeller rotary part, fixed part still includes prepositioning part, prepositioning part includes the prepositioning piece, be provided with the prepositioning groove that can insert rotatory body in it on the prepositioning piece, be provided with at least one spring top pearl structure that withstands rotatory body when rotatory body inserts the prepositioning groove in the prepositioning piece.
The spring ejecting bead structure comprises a spring and an ejecting bead, a bead-ejecting limiting groove cavity is formed in the pre-positioning block, the ejecting bead and the spring are contained in the bead-ejecting limiting groove cavity, one end of the spring abuts against the bottom wall of the bead-ejecting limiting groove cavity, the other end of the spring abuts against the ejecting bead, and the ejecting bead is used for abutting against the rotating body.
The utility model provides a specific structure of rotatory moment provides part to conveniently exert fixed rotatory moment on impeller forward and reverse, drive impeller rotates, rotatory moment provides the part and includes impeller rotation drive subassembly, impeller rotation drive subassembly includes impeller dop that can be connected with the impeller cooperation and links to each other with the impeller dop and is used for the drive the rotatory impeller rotation driving piece of impeller dop.
Further, in order to clamp the impeller chuck into the impeller, the rotation torque providing part further comprises a moving assembly connected with the impeller rotation driving assembly and used for enabling the impeller chuck on the impeller rotation driving assembly to be inserted into the impeller.
The utility model provides a remove the concrete structure of subassembly, it includes mounting panel and mounting panel driving piece to remove the subassembly, the mounting panel driving piece is installed in the frame, the mounting panel driving piece with the mounting panel links to each other, impeller rotation drive subassembly is installed on the mounting panel.
Furthermore, a mounting plate moving guide pair is arranged between the mounting plate and the rack and comprises at least one guide assembly, the guide assembly comprises a guide rail and a guide sleeve, the guide sleeve is mounted on the rack, the guide rail is mounted on the mounting plate, and the guide sleeve is matched with the guide rail in a sliding manner.
The impeller chuck is provided with a clamping part, the clamping part is provided with a containing groove which is matched with the impeller core part in an inserting and assembling mode, and the clamping part is provided with impeller blade inserting grooves which are matched with impeller blades in an inserting and assembling mode respectively on the wall forming the containing groove.
The acquisition component comprises an initial position acquisition device for acquiring initial position information of certain impeller blade on the impeller and a final position acquisition device for acquiring final position information of the impeller blade after the impeller stops rotating under the action of fixed rotating torque, the judgment device is an upper computer, and signal output ends of the initial position acquisition device and the final position acquisition device are respectively connected with the upper computer.
Further, the initial position collecting device and/or the final position collecting device are/is an optical fiber sensor.
The invention also provides a detection method of the detection device for the buffer damping piece of the impeller rotating component, and the method comprises the following steps:
(a) A rotating body which positions the impeller rotating part and fixes the impeller rotating part;
(b) Acquiring initial position information of a certain impeller blade on the impeller through an initial position acquisition device, and transmitting the initial position information to an upper computer;
(c) Providing fixed rotation torque for the impeller to rotate the impeller;
(d) After the impeller stops rotating under the action of fixed rotating torque, the final position information of the impeller blade is collected through a final position collecting device and transmitted to an upper computer, and the upper computer obtains the information whether a buffering damping piece exists in the rotating part of the impeller according to the change of the final position information and the initial position information.
Further, the method further comprises a step (1 a) before the step (a), wherein the step (1 a) is as follows: and after the rotating body of the rotating part of the impeller is pre-positioned, the impeller is driven to continuously rotate forwards and backwards from the starting state, and then the impeller is driven to reset to the starting state.
After the technical scheme is adopted, the rotating part of the impeller is positioned by the fixing part and the rotating body of the rotating part of the impeller is limited to rotate, so that the rotating body cannot rotate in the rotating process of the impeller, then the impeller chuck clamps the impeller by the action of the moving component, the initial position information of a certain impeller blade on the impeller is collected by the initial position collecting device and is transmitted to the upper computer, the impeller is rotated by applying fixed rotating torque to the impeller by actuating the impeller rotating driving part, the final position information of the impeller blade is collected by the final position collecting device and is transmitted to the upper computer after the impeller stops rotating, and the upper computer obtains the information whether the buffering damping piece exists in the rotating part of the impeller according to the change and the initial position information of the final position information, so that whether the buffering damping piece is assembled in place in the rotating part of the impeller can be detected; of course, before the above actions are performed, the rotating body of the impeller rotating part can be pre-positioned through the fixing part, then the impeller is driven to continuously rotate forwards and backwards from the starting state, and then the impeller is driven to reset to the starting state, so that the good matching movement performance between the coupler and the buffering damping part in the impeller rotating part is achieved, and the phenomenon that the buffering driving performance of the impeller rotating part is poor in the starting process due to the fact that the buffering damping part and the coupler are blocked is avoided.
Drawings
FIG. 1 is a perspective view of the impeller rotating member of the present invention;
FIG. 2 is a structural sectional view of the impeller rotating member of the present invention;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a perspective view illustrating a non-operating state of the cushion damper detection apparatus for a rotary member of an impeller according to the present invention;
FIG. 5 is a perspective view showing an operating state of the detecting apparatus for a shock-absorbing member of a rotary member of an impeller according to the present invention;
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1 to 5, a damping member detecting apparatus for a rotary member of an impeller, comprising:
a frame 1;
a fixed member for positioning the impeller rotating member and limiting the rotation of the rotating body 30 of the impeller rotating member;
a rotational torque providing member for coupling with the impeller 10 of the impeller rotating member positioned on the fixed member and providing a fixed rotational torque of the impeller 10;
the acquisition component is used for acquiring the rotation position change information of the impeller 10 from the beginning to the rotation stop under the action of the fixed rotation torque;
and a judgment device which is connected with the acquisition component and obtains the information of whether the buffering and damping piece exists in the rotating component of the impeller according to the change information of the rotating position of the impeller 10 sent by the acquisition component.
As shown in fig. 4 and 5, the fixing component includes at least one set of clamping components, each set of clamping components includes two clamping assemblies, each clamping assembly includes a clamping block 21 and a clamping block driving component, and the clamping block driving components are respectively connected with the corresponding clamping blocks 21, so that the clamping block driving components drive the corresponding clamping blocks 21 to move, and the two clamping blocks 21 in the same set of clamping components move in opposite directions and abut against the rotating body 30 or move in opposite directions and leave the rotating body 30; in the present embodiment, the fixing member includes a set of clamping members, but is not limited thereto; the clamping block 21 is arranged on the frame in a sliding way through a clamping block guide rail pair 23, and the clamping block guide rail pair 23 limits the moving direction of the clamping block 21; the clamp block drive may employ a clamp block drive piston cylinder 24.
As shown in fig. 4 to 5, the fixing component further includes a pre-positioning component, the pre-positioning component includes a pre-positioning block 22, a pre-positioning groove 221 into which the rotating body 30 can be inserted is disposed on the pre-positioning block 22, at least one spring-ejecting ball structure that ejects the rotating body 30 when the rotating body 30 is inserted into the pre-positioning groove 221 is disposed in the pre-positioning block 22, and the structure of the spring-ejecting ball structure may be as follows: the pre-positioning block 22 is internally provided with a top bead limiting groove cavity, the top bead and the spring are accommodated in the top bead limiting groove cavity, one end of the spring abuts against the bottom wall of the top bead limiting groove cavity, the other end of the spring abuts against the top bead, the top bead is used for abutting against the rotating body 30, and the end part of the top bead limiting groove cavity is of a contraction-shaped structure, so that part of the top bead can be exposed to abut against the rotating body 30 without departing from the top bead limiting groove cavity; in this embodiment, the pre-positioning block 22 is a ring-cylindrical structure, and the spring ejecting bead structures are provided in a plurality of numbers, and the spring ejecting bead structures are uniformly distributed on a circumference using the axis of the pre-positioning block 22 as a circle center.
As shown in fig. 4 to 5, the rotational torque providing component includes an impeller rotation driving assembly, and the impeller rotation driving assembly includes an impeller chuck 31 fittingly connected to the impeller and an impeller rotation driving member connected to the impeller chuck 31 and configured to drive the impeller chuck 31 to rotate; in this embodiment, the impeller rotational drive is a servo motor 35.
As shown in fig. 4 to 5, the rotational torque providing part further includes a moving assembly connected to the impeller rotation driving assembly and used for inserting an impeller chuck 31 of the impeller rotation driving assembly into the impeller 10; the moving assembly comprises a mounting plate 32 and a mounting plate driving part, the mounting plate driving part is mounted on the rack 1, the mounting plate driving part is connected with the mounting plate 32, and the impeller rotation driving assembly is mounted on the mounting plate 32; in this embodiment, the mounting plate drive is a mounting plate drive piston cylinder 36; the impeller chuck 31 is moved in the axial direction of the impeller 10 by the mounting plate driving piston cylinder 36.
As shown in fig. 4 to 5, a mounting plate moving guide pair is arranged between the mounting plate 32 and the rack 1, the mounting plate moving guide pair includes at least one guide component, the guide component includes a guide rail 33 and a guide sleeve 34, the guide sleeve 34 is mounted on the rack 1, the guide rail 33 is mounted on the mounting plate 32, and the guide sleeve 34 is in sliding fit with the guide rail 33; in this embodiment, the guide assembly is provided with four, two in a pair, and one ends of the guide rails 33 in the pair are connected together by a connecting plate 37.
The impeller 10 has an impeller core and a plurality of impeller blades 101 connected to an outer wall of the impeller core, and for the impeller 10, a structure of an impeller chuck 31 is specially designed to match with the impeller 10, the impeller chuck 31 has a clamping portion, the clamping portion is provided with a containing groove which is in insertion fit with the impeller core, and the clamping portion is provided with impeller blade insertion grooves 311 which are respectively in insertion fit with the impeller blades on a wall forming the containing groove.
The acquisition part comprises an initial position acquisition device for acquiring initial position information of one impeller blade 101 on the impeller 10 and a final position acquisition device for acquiring final position information of the impeller blade 101 after the impeller 10 stops rotating under the action of fixed rotating torque, the judgment device is an upper computer, and signal output ends of the initial position acquisition device and the final position acquisition device are respectively connected with the upper computer.
The initial position acquisition device and the final position acquisition device are optical fiber sensors.
A detection method of a buffer damper detection device for an impeller rotating component is characterized by comprising the following steps:
(a) A rotating body 30 which positions and fixes the impeller rotating member;
(b) Acquiring initial position information of one impeller blade 101 on the impeller 10 through an initial position acquisition device, and transmitting the initial position information to an upper computer;
(c) Providing a fixed rotation torque to the impeller 10 to rotate the impeller 10;
(d) After the impeller 10 stops rotating under the action of the fixed rotating torque, the final position information of the impeller blades 101 is collected through a final position collecting device and transmitted to an upper computer, and the upper computer obtains the information whether a buffering damping piece exists in an impeller rotating component or not according to the change of the final position information and the initial position information.
The method further comprises a step (1 a) before the step (a), wherein the step (1 a) is as follows: after the rotating body of the impeller rotating part is pre-positioned, the impeller is driven to rotate forwards and backwards continuously from the starting state, and then the impeller is driven to reset to the starting state, so that the impeller rotating part has good matching movement performance between the coupler and the buffering damping part, and the phenomenon that the impeller rotating part has poor buffering driving performance in the starting process due to the fact that the buffering damping part and the coupler are blocked is avoided.
The specific action process of the damping member detection device for the impeller rotating part of the embodiment is as follows:
placing an impeller rotating part to be detected in a pre-positioning groove 221 of a pre-positioning block 22, actuating a mounting plate to drive a piston cylinder 36, moving an impeller chuck 31 along the axial direction of an impeller 10 under the action of the mounting plate to drive the piston cylinder 36, after the impeller chuck 31 is in place, inserting the impeller 10 into the impeller 10, actuating a servo motor 35 to enable the impeller chuck 31 to drive the impeller 10 to continuously move forwards and backwards from a starting state, wherein the number of turns of the forward rotation and the number of turns of the backward rotation are 2-4, wherein 3 times are optimal, then enabling the impeller 10 to return to the starting state through the servo motor 35, which is the step (1 a), then driving the piston cylinder 24 to act by two clamping blocks, driving two clamping blocks 21 to move oppositely and abut against a rotating body 30, so that the rotating body 30 is limited, acquiring initial position information of a certain impeller blade 101 on the impeller 10 through an initial position acquisition device, transmitting the initial position information to an upper computer, driving the impeller 31 to rotate through the servo motor 35, giving a fixed rotating moment to the impeller 10, starting to rotate from the starting state, acquiring final position information of the impeller 101 through a final position acquisition device, transmitting the final position information to the upper computer, and obtaining a buffer position information of the upper computer, wherein the final position information and the final position information of the rotating part are changed according to the upper computer; specifically, when there is no damping piece 50 in the impeller rotating part, because the coupler 40 and the rotating boss 301 are in rigid contact, when the rotating body 30 is limited to be stationary, the final position of the impeller 10 after the rotation stop has limited variation compared with the initial position, when there is a damping piece in the impeller rotating part, because the coupler 40 and the rotating boss 301 are indirectly connected through the damping piece 50, the damping piece 50 and the coupler 40 are in elastic contact, when the rotating body 30 is limited to be stationary, the final position of the impeller 10 after the rotation stop has large variation compared with the initial position, the upper computer is provided with the variation range, and whether there is a damping piece in the upper computer is obtained according to the variation range; by rotating the impeller 10 forward and backward, it is possible to obtain whether or not the 2 cushion dampers 50 in the same impeller rotating member are all mounted in place.
The rotating body 30 with the rotating boss 301 is driven to rotate by the abutting of the coupling 40 and the buffering shock absorber 50
The technical problems, technical solutions and advantages of the present invention will be further described in detail with reference to the above embodiments, it should be understood that the above embodiments are only examples of the present invention and should not be construed as limiting the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A detection device for a buffer and shock absorption member of a rotating part of an impeller is characterized by comprising:
a frame (1);
a fixed member for positioning the impeller rotating member and limiting rotation of the rotating body (30) of the impeller rotating member;
a rotation torque providing member for coupling with the impeller (10) of the impeller rotating member positioned on the fixed member and providing a fixed rotation torque of the impeller (10);
the acquisition component is used for acquiring the rotation position change information of the impeller (10) from the beginning to the rotation stop under the action of the fixed rotation torque;
a judging device which is connected with the acquisition component and obtains the information of whether a buffering damping piece exists in the impeller rotating component according to the rotation position change information of the impeller (10) sent by the acquisition component; wherein the content of the first and second substances,
the acquisition component comprises an initial position acquisition device for acquiring initial position information of one impeller blade (101) on the impeller (10) and a final position acquisition device for acquiring final position information of the impeller blade (101) after the impeller (10) stops rotating under the action of fixed rotating torque;
the signal output ends of the initial position acquisition device and the final position acquisition device are respectively connected with the upper computer;
a variation range is arranged in the upper computer, and whether a buffering damping part is arranged in the impeller rotating part or not is obtained according to the variation range: when the variation between the initial position information and the final position information exceeds the variation range, the impeller rotating part is internally provided with a buffer damping piece, and when the variation between the initial position information and the final position information is in the variation range, the impeller rotating part is not internally provided with the buffer damping piece.
2. The cushion damper detection apparatus for an impeller rotating member according to claim 1, wherein: the fixing component comprises at least one group of clamping components, each group of clamping components comprises two clamping components, each clamping component comprises a clamping block (21) and a clamping block driving part, and the clamping block driving parts are respectively connected with the corresponding clamping blocks (21) so that the clamping block driving parts drive the corresponding clamping blocks (21) to act, and the two clamping blocks (21) in the same group of clamping components move oppositely and abut against the rotating body (30) or move backwards and leave the rotating body (30).
3. A cushion damper detection apparatus for an impeller rotating member according to claim 2, wherein: the fixing component further comprises a pre-positioning component, the pre-positioning component comprises a pre-positioning block (22), a pre-positioning groove (221) capable of inserting the rotating body (30) into the pre-positioning block (22) is formed in the pre-positioning block, and at least one spring ejecting bead structure which is used for ejecting the rotating body (30) when the rotating body (30) is inserted into the pre-positioning groove (221) is arranged in the pre-positioning block (22).
4. A cushion damper detection apparatus for an impeller rotating member according to claim 3, wherein: the spring ejecting bead structure comprises a spring and an ejecting bead, an ejecting bead limiting groove cavity is formed in the pre-positioning block (22), the ejecting bead and the spring are contained in the ejecting bead limiting groove cavity, one end of the spring abuts against the bottom wall of the ejecting bead limiting groove cavity, the other end of the spring abuts against the ejecting bead, and the ejecting bead is used for abutting against the rotating body (30).
5. The cushion damper detection apparatus for an impeller rotating member according to claim 1, wherein: the rotating torque providing part comprises an impeller rotating driving assembly, and the impeller rotating driving assembly comprises an impeller chuck (31) and an impeller rotating driving part, wherein the impeller chuck (31) can be connected with the impeller in a matched mode, and the impeller rotating driving part is connected with the impeller chuck (31) and is used for driving the impeller chuck (31) to rotate.
6. A cushion damper detection apparatus for an impeller rotating member according to claim 5, wherein: the rotating torque providing part further comprises a moving component which is connected with the impeller rotating driving component and is used for enabling an impeller clamping head (31) on the impeller rotating driving component to be inserted into the impeller (10).
7. A cushion damper detection apparatus for an impeller rotating member according to claim 6, wherein: the moving assembly comprises a mounting plate (32) and a mounting plate driving part, the mounting plate driving part is installed on the rack (1), the mounting plate driving part is connected with the mounting plate (32), and the impeller rotation driving assembly is installed on the mounting plate (32).
8. The cushion damper detection apparatus for an impeller rotating member according to claim 7, wherein: mounting panel (32) with it is vice to be provided with the mounting panel removal direction between frame (1), the installation removes the direction vice including at least one direction subassembly, the direction subassembly includes guide rail (33) and guide pin bushing (34), guide pin bushing (34) are installed in frame (1), guide rail (33) are installed on mounting panel (32), guide pin bushing (34) with guide rail (33) sliding fit.
9. The cushion damper detection apparatus for an impeller rotating member according to claim 5, wherein: the impeller chuck (31) is provided with a clamping part, the clamping part is provided with an accommodating groove which is inserted and assembled with the impeller core part, and the clamping part is provided with impeller blade inserting grooves (311) which are respectively inserted and matched with the impeller blades on the wall forming the accommodating groove.
10. A cushion damper detection apparatus for an impeller rotating member according to claim 1, wherein: the initial position acquisition device and/or the final position acquisition device are optical fiber sensors.
11. A method for inspecting a cushion damper inspection apparatus for an impeller rotating member according to any one of claims 1 to 10, wherein the method comprises the steps of:
(a) A rotating body (30) positioning the impeller rotating member and limiting the rotation of the impeller rotating member;
(b) Acquiring initial position information of a certain impeller blade (101) on the impeller (10) through an initial position acquisition device, and transmitting the initial position information to an upper computer;
(c) Providing fixed rotation torque for the impeller (10) to enable the impeller (10) to rotate;
(d) After the impeller (10) stops rotating under the action of fixed rotating torque, the final position information of the impeller blade (101) is collected through a final position collecting device and transmitted to an upper computer, and the upper computer obtains the information whether a buffering damping part exists in an impeller rotating part or not according to the change of the final position information and the initial position information.
12. The detection method according to claim 11, characterized in that: the method further comprises a step (1 a) before the step (a), wherein the step (1 a) is as follows: after the rotating body of the rotating part of the impeller is prepositioned, the impeller (10) is driven to rotate forwards and backwards continuously from the starting state, and then the impeller (10) is driven to reset to the starting state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710168269.4A CN106931882B (en) | 2017-03-21 | 2017-03-21 | Detection device and detection method for buffering and damping piece of impeller rotating part |
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| CN201710168269.4A CN106931882B (en) | 2017-03-21 | 2017-03-21 | Detection device and detection method for buffering and damping piece of impeller rotating part |
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