CN116818195A - Chopper wheel dynamic balance debugging device and method - Google Patents

Chopper wheel dynamic balance debugging device and method Download PDF

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Publication number
CN116818195A
CN116818195A CN202310634650.0A CN202310634650A CN116818195A CN 116818195 A CN116818195 A CN 116818195A CN 202310634650 A CN202310634650 A CN 202310634650A CN 116818195 A CN116818195 A CN 116818195A
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CN
China
Prior art keywords
vibration
chopper
value
component
dynamic balance
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Pending
Application number
CN202310634650.0A
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Chinese (zh)
Inventor
朱伟平
刘福乐
黄翌敏
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Yirui Image Technology Chengdu Co ltd
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Yirui Image Technology Chengdu Co ltd
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Yirui Image Technology Chengdu Co ltd filed Critical Yirui Image Technology Chengdu Co ltd
Priority to CN202310634650.0A priority Critical patent/CN116818195A/en
Publication of CN116818195A publication Critical patent/CN116818195A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/14—Determining unbalance
    • G01M1/16—Determining unbalance 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
    • G01M1/30—Compensating unbalance

Abstract

The invention provides a chopper wheel dynamic balance debugging device and a debugging method, wherein the device comprises a supporting component, a vibrating component, a fixing component, a first vibrating sensor and a second vibrating sensor, wherein the vibrating component is arranged in a suspending way, the top end of the vibrating component is connected with the supporting component, and the supporting component provides support for the vibrating component; the fixed component is positioned at the bottom of the vibration component and connected with the vibration component, and is used for installing and fixing the chopper plate to be tested; the first vibration sensor is used for detecting axial vibration of the chopper disk; the second vibration sensor is used for detecting radial vibration of the chopper disk. The dynamic balance debugging device for the chopping disk can debug the radial unbalance of the chopping disk, and is combined with a micrometer to debug the axial vibration of the chopping disk, so that the vibration noise is reduced, the experience of an operator is improved, the imaging precision is improved, the loss of a driving motor is reduced, and the service life of the chopping disk is prolonged.

Description

Chopper wheel dynamic balance debugging device and method
Technical Field
The invention belongs to the technical field of radiation imaging, and relates to a chopper wheel dynamic balance debugging device and a debugging method.
Background
Most of common X-ray detection equipment is transmission imaging, an X-ray machine and an imaging detector are respectively arranged on two sides of an imaging object and are different from the transmission imaging equipment, an X-ray back-scattering imager is a nondestructive detection instrument based on Compton scattering principle, and the back-scattering imager is used for arranging the X-ray machine and the imaging detector on the same side of the imaging object, so that the adaptability of the detection equipment is optimized. Scanning imaging can be realized on one side of an imaging object, scanning is carried out on corners, floors, walls, large objects and the like, the back scattering is more sensitive to detection of organic matters, contraband products such as drugs, explosives and the like in an interlayer can be easily identified, and the imaging device is widely applied to the fields of public security, frontier defense, anti-terrorism, security, emergency detection, large object detection and the like.
As shown in fig. 1, a detection schematic diagram of a backscatter imager is shown, a radiation source 01 is used for generating a cone-shaped X-ray beam, the cone-shaped X-ray beam is limited to a fan-shaped X-ray beam after passing through a collimator 02, the fan-shaped X-ray beam is matched with a slit of the chopper disk after passing through a chopper disk 03 rotating at a high speed to form periodic flying points to scan an imaging object 04, when the flying points are projected onto the imaging object 04, compton backscattering is generated with electrons in the imaging object, scattered photons are received by a detector 05 and are converted into voltage signals through photoelectric conversion, the corresponding magnitude of the voltage signal amplitude is used as an image brightness/gray value, and finally, an X-ray backscatter image is reconstructed, so that imaging detection of the imaging object 04 is completed. The collimator 02 and the chopper wheel 03 are core structures of a backscatter imager, and are made of high-density metal, so that shielding of X-ray beams at non-slit positions is realized, and in general, the materials used for manufacturing the chopper wheel are insufficient in density uniformity, and tolerance is introduced in the machining process, so that the center of mass of the chopper wheel is not in the geometric center of the chopper wheel, and small unbalanced mass is further amplified when the chopper wheel rotates at a high speed, so that not only large mechanical noise is introduced, but also the instrument is dithered, the handheld experience of an operator is reduced, and image distortion of different degrees is caused.
Therefore, how to provide a dynamic balance debugging device and a debugging method for a chopper disk to reduce vibration noise of the chopper disk, improve imaging precision, reduce loss of a driving motor, and prolong service life of the chopper disk is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide a dynamic balance adjustment device and adjustment method for a chopper disk, which are used for solving the problems of low imaging precision, low service life of the chopper disk, etc. caused by large vibration noise of the chopper disk in the prior art.
To achieve the above and other related objects, the present invention provides a chopper wheel dynamic balance adjustment apparatus, comprising:
a support member;
the vibrating component is arranged in a suspending mode, the top end of the vibrating component is connected with the supporting component, and the supporting component provides support for the vibrating component;
the fixed component is positioned at the bottom of the vibration component and connected with the vibration component, and is used for installing and fixing the chopper plate to be tested;
a first vibration sensor for detecting axial vibration of the chopper wheel;
and a second vibration sensor for detecting radial vibration of the chopper wheel.
Optionally, the support component includes left supporting part, right supporting part and upper supporting part, left side supporting part with right supporting part symmetry sets up, upper supporting part's left end with left supporting part's upper end is connected, upper supporting part's right-hand member with right supporting part's upper end is connected, vibrating component's top with upper supporting part connects.
Optionally, the vibration member comprises a vibration reed.
Optionally, the top end of the vibration component is fixedly connected with the supporting component through a screw.
Optionally, the first vibration sensor is connected to a bottom of the vibration member or the fixing member, and the second vibration sensor is connected to the bottom of the vibration member or the fixing member.
Optionally, the first vibration sensor includes an X-axis vibration sensor and the second vibration sensor includes a Y-axis vibration sensor.
The invention also provides a method for debugging the dynamic balance of the chopper disk, which comprises the following steps:
mounting a chopper disc to be tested on a driving shaft, measuring an end tuning value of the chopper disc by adopting a dial indicator, reinstalling and debugging if the end tuning value is larger than a reference value, and executing the next step if the end tuning value is smaller than the reference value;
measuring an axial vibration value and a radial vibration value of the chopper disk on any chopper disk dynamic balance debugging device;
if the axial vibration value is larger than the reference value, measuring the end jump value of the chopper disk by adopting a dial indicator to acquire the inclination direction of the chopper disk, correcting according to the deviation direction of the chopper disk, re-measuring the axial vibration value, and ending the axial debugging when the axial vibration value is smaller than the reference value;
if the radial vibration value is larger than the reference value, adopting a weight test method to carry out radial debugging, obtaining an unbalance amount, increasing or reducing weight on the chopper disk based on the unbalance amount, then measuring the radial vibration value again, and ending radial debugging when the radial vibration value is smaller than the reference value.
Optionally, the test weight method includes a single-sided balance coefficient method, and the method for obtaining the unbalance amount by using the test weight method includes:
1) Measuring the original amplitude vector of the chopper wheel at a balanced rotation speedSaid original amplitude vector +.>Expressed as:
wherein A is 01 Is the original amplitude value, A is- 01 Is the original phase angle;
2) Adding a test weight m to the test weight plane 1 At the balanced rotation speed, the amplitude vector after the test weight is increased is measuredThe amplitude vector after the test weight is increased +.>Expressed as:
wherein A is 11 To increase the amplitude value after test weight, angle A 11 To increase the phase angle after test weights;
3) Calculating an influence coefficientThe influence coefficient->Expressed as:
4) Calculating unbalanceThe unbalance amount->Expressed as:
wherein M is 1 Is unbalanced mass, angle M 1 Is an unbalanced phase angle.
Optionally, calculating the unbalance amountThen, M is removed at the corresponding angle position on the balance surface 1 Or increasing M in opposite directions at corresponding angular positions on the balancing surface 1 To achieve dynamic balance adjustment.
As described above, the dynamic balance debugging device for the chopping disk can debug the radial unbalance amount of the chopping disk, and is combined with a micrometer to debug the axial vibration of the chopping disk, so that the vibration noise is reduced, the experience of an operator is improved, the imaging precision is improved, the loss of a driving motor is reduced, and the service life of the chopping disk is prolonged.
Drawings
Fig. 1 shows a schematic detection diagram of a back-scatter imager.
Fig. 2 is a schematic view showing that a vibration part is mounted on a support part in the chopper wheel dynamic balance adjustment apparatus of the present invention.
Fig. 3 is a schematic diagram showing that a vibration detecting member is mounted on a vibration member in the chopper wheel dynamic balance adjustment apparatus of the present invention.
FIG. 4 is a flow chart showing a method for debugging the dynamic balance of the chopper wheel in the invention.
Description of element numbers:
01. radiation source
02. Collimator
03. Chopper disk
04. Imaging object
05. Detector for detecting a target object
1. Support member
101. Left support part
102. Right support part
103. Upper support part
2. Vibrating component
3. Fixing component
4. First vibration sensor
5. Second vibration sensor
6. Chopper disk
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
Please refer to fig. 1 to 4. It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.
The embodiment provides a chopper dynamic balance debugging device, please refer to fig. 2 and 3, which are respectively shown as a schematic diagram of a vibration component mounted on a supporting component and a schematic diagram of a vibration detection component mounted on the vibration component in the chopper dynamic balance debugging device, wherein the chopper dynamic balance debugging device comprises a supporting component 1, a vibration component 2, a fixing component 3, a first vibration sensor 4 and a second vibration sensor 5, wherein the vibration component 2 is in a suspended arrangement, the top end of the vibration component 2 is connected with the supporting component 1, and the supporting component 1 provides support for the vibration component 2; the fixed part 3 is located the bottom of vibrating part 2 and with vibrating part 2 is connected, fixed part 3 is used for installing fixed chopping disk 6 that waits to test, first vibration sensor 4 is used for detecting the axial vibration of chopping disk 6, second vibration sensor 5 is used for detecting the radial vibration of chopping disk 6.
As an example, the support member 1 is a portal structure of a cantilever beam, and includes a left support portion 101, a right support portion 102, and an upper support portion 103, where the left support portion 101 and the right support portion 102 are symmetrically disposed in a left-right direction, a left end of the upper support portion 103 is connected to an upper end of the left support portion 101, a right end of the upper support portion 103 is connected to an upper end of the right support portion 102, and the vibration member 2 is connected to the upper support portion 103. Specifically, the vibration member 2 is fixedly connected to the upper support portion 103 by a screw to restrict the vibration member 2 from moving up and down in the Z-axis direction.
As an example, the vibration member 2 includes a vibration reed, the chopper wheel 6 is mounted to the vibration member 2 through a fixing member 3, the first vibration sensor 4 is connected to the bottom of the vibration member 2 or the fixing member 3, and the second vibration sensor 5 is connected to the bottom of the vibration member 2 or the fixing member 3. Specifically, in this embodiment, the chopper wheel 6 is perpendicular to the X-axis direction, the first vibration sensor 4 is an X-axis vibration sensor to detect axial vibration of the chopper wheel 6, the chopper wheel 6 is parallel to the Y-axis direction, and the second vibration sensor 5 is a Y-axis vibration sensor to detect radial vibration of the chopper wheel 6.
As an example, in practical application, the vibration of the chopper disk 6 is not only derived from the radial vibration caused by the non-uniformity of the density of the material and the tolerance in the processing process, and the center of mass of the chopper disk is not in the geometric center, but also there may be axial vibration caused by the deviation of the perpendicularity of the chopper disk and the driving shaft due to the assembly precision after the chopper disk 6 is mounted on the driving shaft, and the axial vibration and the radial vibration comprehensively affect the integral vibration of the device, and finally affect the handheld experience and the service life of the device.
As an example, referring to fig. 4, a flowchart of a method for debugging dynamic balance of a chopper wheel is shown, comprising the steps of:
(1) And installing the chopping disk to be tested on the driving shaft, measuring the end tuning value of the chopping disk by adopting a dial indicator, reinstalling and debugging if the end tuning value is larger than the reference value, and executing the next step if the end tuning value is smaller than the reference value.
(2) And measuring the axial vibration value and the radial vibration value of the chopper disc on a chopper disc dynamic balance debugging device.
(3) And if the axial vibration value is larger than the reference value, measuring the end jump value of the chopping disk by adopting a dial indicator so as to acquire the inclination direction of the chopping disk, correcting according to the deviation direction of the chopping disk, re-measuring the axial vibration value, and ending the axial debugging when the axial vibration value is smaller than the reference value.
As an example, in general, when the end adjustment value measured by the dial gauge in the step (1) is within the reference value range, the measured axial vibration value should be within the reference value range, but the axial vibration value is not within the reference range due to the degradation of the perpendicularity of the chopper disk and the driving shaft, the chopper disk inclination direction needs to be obtained according to the end jump value of the dial gauge, the correction is performed according to the deviation direction, and then the axial vibration value is measured by the vibration test bench again, i.e. the severity of the axial vibration reference range is greater than the severity of the end jump value reference range.
(4) If the radial vibration value is larger than the reference value, adopting a test weight method to carry out radial debugging in the chopper wheel dynamic balance debugging device, obtaining an unbalance amount, adjusting dynamic balance on the chopper wheel based on weight increase or weight reduction of the unbalance amount, then re-measuring the radial vibration value, and ending radial debugging when the radial vibration value is smaller than the reference value.
Specifically, the test weight method includes a single-sided balance coefficient method, and the method for acquiring the unbalanced mass and the unbalanced angle by using the test weight method includes:
40 At equilibrium rotational speed, measuring the original amplitude vector of the chopper wheelSaid original amplitude vector +.>Expressed as:
wherein A is 01 Is the original amplitude value, A is- 01 Is the original phase angle.
41 Adding a test weight m to the test weight plane 1 At the balanced rotation speed, the amplitude vector after the test weight is increased is measuredThe amplitude vector after the test weight is increased +.>Expressed as:
wherein A is 11 To increase the amplitude value after test weight, angle A 11 To increase the phase angle after the test weight.
42 Calculating an influence coefficientThe influence coefficient->Expressed as:
43 Calculating unbalance amountThe unbalance amount->Expressed as:
wherein M is 1 Is unbalanced mass and is called angle 1 Is an unbalanced phase angle.
As an example, the unbalance amount is calculatedThen, removing the corresponding angle position on the balance surface 1 Or increasing M in opposite directions at corresponding angular positions on the balancing surface 1 To achieve dynamic balance adjustment and then re-measuring radial vibration values at the vibration measuring table.
As an example, if both the adjusted radial vibration value and the axial vibration value are lower than the reference value, the debugging is ended, otherwise, the debugging is continued.
In summary, the dynamic balance debugging device for the chopper wheel can debug the radial unbalance amount of the chopper wheel, and is combined with the micrometer to debug the axial vibration of the chopper wheel, so that the vibration noise is reduced, the experience of an operator is improved, the imaging precision is improved, the loss of a driving motor is reduced, and the service life of the chopper wheel is prolonged. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. It is therefore intended that all equivalent modifications and changes made by those skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the appended claims.

Claims (9)

1. The chopper wheel dynamic balance debugging device is characterized by comprising:
a support member;
the vibrating component is arranged in a suspending mode, the top end of the vibrating component is connected with the supporting component, and the supporting component provides support for the vibrating component;
the fixed component is positioned at the bottom of the vibration component and connected with the vibration component, and is used for installing and fixing the chopper plate to be tested;
a first vibration sensor for detecting axial vibration of the chopper wheel;
and a second vibration sensor for detecting radial vibration of the chopper wheel.
2. The chopper wheel dynamic balance adjustment apparatus according to claim 1, wherein: the support component comprises a left support part, a right support part and an upper support part, wherein the left support part and the right support part are symmetrically arranged, the left end of the upper support part is connected with the upper end of the left support part, the right end of the upper support part is connected with the upper end of the right support part, and the top end of the vibration component is connected with the upper support part.
3. The chopper wheel dynamic balance adjustment apparatus according to claim 1, wherein: the vibration member includes a vibration reed.
4. The chopper wheel dynamic balance adjustment apparatus according to claim 1, wherein: the top end of the vibration part is fixedly connected with the supporting part through a screw.
5. The chopper wheel dynamic balance adjustment apparatus according to claim 1, wherein: the first vibration sensor is connected with the bottom of the vibration part or the fixing part, and the second vibration sensor is connected with the bottom of the vibration part or the fixing part.
6. The chopper wheel dynamic balance adjustment apparatus according to claim 1, wherein: the first vibration sensor includes an X-axis vibration sensor and the second vibration sensor includes a Y-axis vibration sensor.
7. The method for debugging the dynamic balance of the chopper disk is characterized by comprising the following steps of:
mounting a chopper disc to be tested on a driving shaft, measuring an end tuning value of the chopper disc by adopting a dial indicator, reinstalling and debugging if the end tuning value is larger than a reference value, and executing the next step if the end tuning value is smaller than the reference value;
measuring an axial vibration value and a radial vibration value of the chopper wheel on the chopper wheel dynamic balance adjustment apparatus of any one of claims 1-6;
if the axial vibration value is larger than the reference value, measuring the end jump value of the chopper disk by adopting a dial indicator to acquire the inclination direction of the chopper disk, correcting according to the deviation direction of the chopper disk, re-measuring the axial vibration value, and ending the axial debugging when the axial vibration value is smaller than the reference value;
if the radial vibration value is larger than the reference value, adopting a weight test method to carry out radial debugging, obtaining an unbalance amount, increasing or reducing weight on the chopper disk based on the unbalance amount, then measuring the radial vibration value again, and ending radial debugging when the radial vibration value is smaller than the reference value.
8. The method for adjusting dynamic balance of chopper wheel according to claim 7, wherein the test-weight method includes a single-sided balance coefficient method, and the method for obtaining the unbalance amount by using the test-weight method includes:
1) Measuring the original amplitude vector of the chopper wheel at a balanced rotation speedSaid original amplitude vector +.>Expressed as:
wherein A is 01 Is the original amplitude value, A is- 01 Is original asPhase angle;
2) Adding a test weight m to the test weight plane 1 At the balanced rotation speed, the amplitude vector after the test weight is increased is measuredThe amplitude vector after the test weight is increased +.>Expressed as:
wherein A is 11 To increase the amplitude value after test weight, angle A 11 To increase the phase angle after test weights;
3) Calculating an influence coefficientThe influence coefficient->Expressed as:
4) Calculating unbalanceThe unbalance amount->Expressed as:
wherein M is 1 Is unbalanced mass, angle M 1 Is an unbalanced phase angle.
9. The method for debugging the dynamic balance of a chopper wheel according to claim 8, wherein: calculating the unbalance amountThen, M is removed at the corresponding angle position on the balance surface 1 Or increasing M in opposite directions at corresponding angular positions on the balancing surface 1 To achieve dynamic balance adjustment.
CN202310634650.0A 2023-05-31 2023-05-31 Chopper wheel dynamic balance debugging device and method Pending CN116818195A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310634650.0A CN116818195A (en) 2023-05-31 2023-05-31 Chopper wheel dynamic balance debugging device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310634650.0A CN116818195A (en) 2023-05-31 2023-05-31 Chopper wheel dynamic balance debugging device and method

Publications (1)

Publication Number Publication Date
CN116818195A true CN116818195A (en) 2023-09-29

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ID=88117626

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310634650.0A Pending CN116818195A (en) 2023-05-31 2023-05-31 Chopper wheel dynamic balance debugging device and method

Country Status (1)

Country Link
CN (1) CN116818195A (en)

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