CN109027541A - A kind of oil pump noise detection device - Google Patents
A kind of oil pump noise detection device Download PDFInfo
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- CN109027541A CN109027541A CN201810855615.0A CN201810855615A CN109027541A CN 109027541 A CN109027541 A CN 109027541A CN 201810855615 A CN201810855615 A CN 201810855615A CN 109027541 A CN109027541 A CN 109027541A
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- oil pump
- detection device
- noise detection
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- 238000001514 detection method Methods 0.000 title claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
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- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 229920001778 nylon Polymers 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000013016 damping Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 241000233855 Orchidaceae Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000030808 detection of mechanical stimulus involved in sensory perception of sound Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
Classifications
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- 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
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
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- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of oil pump noise detection devices, are related to noise measuring technical field.The present invention includes ground bottom plate, and the arrangement of one surface perimeter of ground bottom plate is provided with linear double guide groove；Bottom plate one surface in ground is provided with circular trough；One surface of circular trough is fixed with supporting table component；Linear double one surface of guide groove is fixed with cylindrical linear rail；Cylindrical linear rail is sliding combined with basal sliding positioning component；Supporting table component includes bottom attachment base and top braces cylinder.The rotation and damping that the present invention passes through the supporting table component and ground bottom plate connecting inner of design, the top braces cylinder of external diaphragm sound sound-absorbing reduces external factor interference, increase the accuracy of measurement, cylindrical linear rail, basal sliding positioning component, upright support component, horizontal support members and regulating part facilitate adjusting sensor noise, solve the problems, such as that existing measurement is inaccurate and trouble is put in sensor noise position.
Description
Technical field
The invention belongs to noise measuring technical fields, more particularly to a kind of oil pump noise detection device.
Background technique
Oil pump is a kind of not only light but also compact pump, there is in-line arrangement, distribution formula and monomer-type three categories.Oil pump proposes one
The movable moulded parts that kind has the oil pump of a shell made of aluminium-containing material and is arranged in the shell, wherein should
Movable moulded parts is at least partly by a kind of a kind of material system of ferrous alloy sintered, including at least austenite
At.
There is friction during fortune in component inside oil pump, internal friction seriously will cause oil pump power decline and
The reduction in service life, friction it is serious whether from appearance can not from, by external detection sound point value is counter pushes away inside oil pump
Friction seriousness, the friction more sound of severe external more bigger calculated by point a detection device, however in soundproof room
When interior detection noise, oil pump is mounted on fixed steel plate, and oil pump generates point the value of resonance measuring not with steel plate in operation
It is enough accurate while more troublesome when adjusting the horizontal distance and vertical range with oil pump for the support frame of sensor noise.
Summary of the invention
The purpose of the present invention is to provide a kind of oil pump noise detection devices, supporting table component and ground bottom by design
The rotation and damping of plate connecting inner, the top braces cylinder of external diaphragm sound sound-absorbing reduce external factor interference, increase measurement
Accuracy, cylindrical linear rail, basal sliding positioning component, upright support component, horizontal support members and regulating part facilitate tune
Sensor noise is saved, solves the problems, such as that existing measurement is inaccurate and trouble is put in sensor noise position.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions:
The present invention is a kind of oil pump noise detection device, including ground bottom plate, one surface perimeter of the ground bottom plate arrangement
It is provided with linear double guide groove；One surface of ground bottom plate is provided with circular trough；One surface of circular trough is fixed with supporting table
Component；Linear double one surface of guide groove is fixed with cylindrical linear rail；The cylindrical linear rail is sliding combined with bottom
Slide positioning component in portion；The supporting table component includes bottom attachment base and top braces cylinder；One inner wall of bottom attachment base
It is fixed with bearing retainer circle；The bottom attachment base inner wall is fixed with center rotary column by bearing；One surface of center rotary column
Rectangular arranged is fixed with yielding rubber column by screw；One end face of yielding rubber column and top braces cylinder inner wall cooperate；Institute
It states the arrangement of one surface rectangle of top braces cylinder and is provided with counter sink；The top braces cylinder passes through hexagon socket head cap screw and yielding rubber column
It is fixedly connected；One surface rectangle of the top braces cylinder arrangement is fixed with pump housing mounting base；One end face of bottom attachment base is solid
Surely there is connecting flange；The connecting flange is fixedly connected by bolt with one surface of circular trough；The basal sliding positioning component
Including two linear sliders；Two one surfaces of linear slider are fixed with the first connecting plate；First connecting plate, one surface linear
Arrangement is fixed with several interior triangular connection cylinders；Upright support component is combined in several interior triangular connection cylinders；
The upright support component includes upright support bar；The upright support bar week, side was combined with regulating part；The regulating part packet
Include the first adjusting cylinder；The first adjusting cylinder is slidably matched with upright support bar week side；Described first adjusts cylinder week
Side is fixed with the second adjusting cylinder；First adjusting cylinder week side is threaded with the first lock-screw；Described second
It adjusts cylinder week side and is threaded with the second lock-screw；The second adjusting cylinder inner wall is combined with horizontal support members；
The horizontal support members include horizontal support bar；The horizontal support bar is slidably matched with the second adjusting cylinder；The level
Support rod one end is fixed with nylon spring clip；The nylon spring clip is clamped with sensor noise.
Further, one surface of circular trough is fixed with servo motor；The servo motor output shaft passes through shaft coupling
The short axle fixed with one surface of center rotary column is fixedly connected.
Further, the first connecting plate one side is fixed with auxiliary locking sliding block；One table of auxiliary locking sliding block
Face is threaded with third lock-screw.
Further, interior triangular connection one inner wall of cylinder is fixed with magnet.
Further, one end face of upright support bar is fixed with bottom support plate；One surface line of bottom support plate
Property arrangement be fixed with several cylinder pylons；One surface of cylinder pylon is fixed with triangular prism；The triangular prism and interior triangular
Connection cylinder inner wall is slidably matched.
Further, top braces cylinder surface is coated with attraction coating；The attraction coating is that CE- wishes sound coating.
Further, the center rotary column week side is fixed with stop flange.
Further, the ground bottom plate is placed on isolation sound and inner wall absorbs the house that the sound decibel of sound detects
It is interior.
Further, one surface of cylindrical linear rail is equipped with graduation mark.
Further, one surface of upright support bar is equipped with graduation mark.
The invention has the following advantages:
1, the present invention carries out multi-direction survey by the supporting table component of design and the center rotary column of ground bottom plate connecting inner
The top braces cylinder reduction vibration and noise diffusion of amount, yielding rubber column and external diaphragm sound sound-absorbing reduce to oil pump noise detection
Interference increases the accuracy of measurement oil pump itself noise-measuring.
2, the present invention by cylindrical linear rail, basal sliding positioning component, upright support component, horizontal support members and
Regulating part facilitates adjusting sensor noise, carries out the measurement of various dimensions, facilitates the accuracy for increasing measurement while adjusting.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of structural schematic diagram of oil pump noise detection device of the present invention；
Fig. 2 is the partial enlarged view in Fig. 1 at A；
Fig. 3 is the structural schematic diagram of ground bottom plate；
Fig. 4 is the configuration schematic diagram of supporting table component；
Fig. 5 is the structural schematic diagram of basal sliding positioning component；
Fig. 6 is the structural schematic diagram of upright support component；
In attached drawing, parts list represented by the reference numerals are as follows:
The ground 1- bottom plate, 2- supporting table component, 3- basal sliding positioning component, 4- upright support component, 5- are horizontally-supported
Component, 6- regulating part, 7- sensor noise, 8- top braces cylinder, the bottom 9- attachment base, 10- cylindrical linear rail, the center 11-
Rotary column, 12- bearing, 13- yielding rubber column, 14- hexagon socket head cap screw, linearly double guide groove, 102- circular trough, 103- are watched 101-
Taking motor, 104- shaft coupling, 301- linear slider, the first connecting plate of 302-, 303- interior triangular connects cylinder, 304- magnet,
305- auxiliary locking sliding block, 306- third lock-screw, 401- upright support bar, 402- bottom support plate, 403- cylinder pylon,
404- triangular prism, 501- horizontal support bar, 502- nylon spring clip, 601- first adjust cylinder, and 602- second adjusts cylinder,
The first lock-screw of 603-, the second lock-screw of 604-, 801- counter sink, 802- pump housing mounting base, 901- bearing retainer circle,
902- connecting flange, 111- stop flange.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
It please refers to shown in Fig. 1-6, the present invention is a kind of oil pump noise detection device, including ground bottom plate 1, ground bottom plate 1
The arrangement of one surface perimeter is provided with linear double guide groove 101；Bottom plate 1 one surface in ground is provided with circular trough 102；Circular trough 102 1
Surface is fixed with supporting table component 2；Linear double 101 1 surface of guide groove is fixed with cylindrical linear rail 10；Cylinder straight line is led
Rail 10 is sliding combined with basal sliding positioning component 3；
Supporting table component 2 includes bottom attachment base 9 and top braces cylinder 8；Attachment base 9 one inner wall in bottom is fixed with bearing and holds
Backing ring 901；Attachment base 9 inner wall in bottom is fixed with center rotary column 11 by bearing 12；The arrangement of 11 1 surface rectangle of center rotary column is logical
It crosses screw and is fixed with yielding rubber column 13；13 1 end face of yielding rubber column and 8 inner wall of top braces cylinder cooperate；Top braces cylinder 8
The arrangement of one surface rectangle is provided with counter sink 801；Top braces cylinder 8 connects by the way that hexagon socket head cap screw 14 and yielding rubber column 13 are fixed
It connects；The arrangement of 8 one surface rectangle of top braces cylinder is fixed with pump housing mounting base 802；Attachment base 9 one end face in bottom is fixed with connection method
Orchid 902；Connecting flange 902 is fixedly connected by bolt with 102 1 surface of circular trough；
Basal sliding positioning component 3 includes two linear sliders 301；Two linear sliders, 301 1 surface is fixed with the first connection
Plate 302；The arrangement of first connecting plate, 302 1 surface linear is fixed, and there are two interior triangulars to connect cylinder 303；Two interior triangulars connect
It connects and is combined with upright support component 4 in cylinder 303；
Upright support component 4 includes upright support bar 401；401 weeks sides of upright support bar are combined with regulating part 6；It adjusts
Part 6 includes the first adjusting cylinder 601；First adjusting 401 weeks sides of cylinder 601 and upright support bar are slidably matched；First is adjusted
601 weeks sides of cylinder are fixed with the second adjusting cylinder 602；First adjusting 601 weeks sides of cylinder are threaded with the first locking screw
Nail 603；Second adjusting 602 weeks sides of cylinder are threaded with the second lock-screw 604；Second adjusts the cooperation of 602 inner wall of cylinder
There are horizontal support members 5；Horizontal support members 5 include horizontal support bar 501；Horizontal support bar 501 and second adjusts cylinder 602
It is slidably matched；501 one end of horizontal support bar is fixed with nylon spring clip 502；Nylon spring clip 502 is clamped with sensor noise 7.
Wherein, 102 1 surface of circular trough is fixed with servo motor 103；103 output shaft of servo motor passes through shaft coupling 104
The short axle fixed with 11 1 surface of center rotary column is fixedly connected.
Wherein, 302 one side of the first connecting plate is fixed with auxiliary locking sliding block 305；Assist 305 1 surface spiral shell of locking sliding block
Line is connected with third lock-screw 306.
Wherein, interior triangular connection 303 1 inner wall of cylinder is fixed with magnet 304.
Wherein, 401 1 end face of upright support bar is fixed with bottom support plate 402；402 1 surface linear of bottom support plate row
Column are fixed, and there are two cylinder pylons 403；403 1 surface of cylinder pylon is fixed with triangular prism 404；Triangular prism 404 and interior triangular
Connection 303 inner wall of cylinder is slidably matched.
Wherein, 8 surface of top braces cylinder is coated with attraction coating；Attracting coating is that CE-2001 wishes sound coating.
Wherein, rotary column 11 weeks sides in center are fixed with stop flange 111.
Wherein, ground bottom plate 1 is placed on isolation sound and inner wall absorbs in the house of sound decibel detection of sound.
Wherein, 10 1 surface of cylindrical linear rail is equipped with graduation mark.
Wherein, 401 1 surface of upright support bar is equipped with graduation mark.
One concrete application of the present embodiment are as follows: installation oil pump is detected, and supporting table component 2 is installed, supporting table
Yielding rubber column 13 inside component 2 is fixed by bolts between center rotary column 11 and top braces cylinder 8,8 table of top braces cylinder
It corresponds to hole location placement oil pump in the pump housing mounting base 802 in face to be bolted, according to the quarter on 10 1 surface of cylindrical linear rail
It spends line adjustment adjustment basal sliding positioning component 3 1m every with respect to the distance of supporting table component 2 and is arranged one, first basal sliding
Positioning component 3 apart from supporting table component 2 be 20cm, by regulating part 6 adjust horizontal support members 5 relative altitude, totally two
Horizontal support members 5, first surface as 2 oiling pump of supporting table component close sound insulation and detect room, and starting oil pump is read
Noise point the value detected in each sensor noise 7 is recorded, by the driving of servo motor 103 fixed inside circular trough 102
Heart rotary column 11 rotates, and then drives top braces cylinder 8 and oil pump rotation, and rotation reads again data after stopping, until rotation one
Week the decibel value of different distance is calculated using the method for average.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (9)
1. a kind of oil pump noise detection device, including ground bottom plate (1), it is characterised in that: (1) one surface of the ground bottom plate circle
Week arrangement is provided with linear double guide groove (101)；(1) one surface of ground bottom plate is provided with circular trough (102)；The circular trough
(102) one surfaces are fixed with supporting table component (2)；Linear double (101) one surface of guide groove is fixed with cylinder straight line and leads
Rail (10)；The cylindrical linear rail (10) is sliding combined with basal sliding positioning component (3)；
The supporting table component (2) includes bottom attachment base (9) and top braces cylinder (8)；(9) one inner wall of bottom attachment base
It is fixed with bearing retainer circle (901)；Bottom attachment base (9) inner wall is fixed with center rotary column (11) by bearing (12)；Institute
It states the arrangement of (11) one surface rectangle of center rotary column and yielding rubber column (13) is fixed with by screw；The yielding rubber column (13) one
End face and top braces cylinder (8) inner wall cooperate；(8) one surface rectangle of the top braces cylinder arrangement is provided with counter sink (801)；Institute
Top braces cylinder (8) are stated to be fixedly connected by hexagon socket head cap screw (14) with yielding rubber column (13)；The top braces cylinder (8) one
Surface rectangle arrangement is fixed with pump housing mounting base (802)；(9) one end face of bottom attachment base is fixed with connecting flange (902)；
The connecting flange (902) is fixedly connected by bolt with (102) one surface of circular trough；
The basal sliding positioning component (3) includes two linear sliders (301)；Two (301) one surfaces of linear slider are fixed
There are the first connecting plate (302)；(302) one surface linear of the first connecting plate arrangement is fixed with several interior triangular connection cylinders
(303)；Upright support component (4) are combined in several interior triangular connections cylinder (303)；
The upright support component (4) includes upright support bar (401)；The all sides of the upright support bar (401) are combined with tune
It saves part (6)；The regulating part (6) includes the first adjusting cylinder (601)；Described first adjusts cylinder (601) and upright support bar
(401) all sides are slidably matched；Described first, which adjusts cylinder (601) all sides, is fixed with the second adjusting cylinder (602)；Described
One, which adjusts cylinder (601) all sides, is threaded with the first lock-screw (603)；Described second adjusts cylinder (602) all sides
It is threaded with the second lock-screw (604)；Described second adjusting cylinder (602) inner wall is combined with horizontal support members (5)；Institute
Stating horizontal support members (5) includes horizontal support bar (501)；The horizontal support bar (501) adjusts cylinder (602) with second and slides
Dynamic cooperation；Described horizontal support bar (501) one end is fixed with nylon spring clip (502)；The nylon spring clip (502) is clamped with
Sensor noise (7).
2. a kind of oil pump noise detection device according to claim 1, which is characterized in that (102) one table of circular trough
Face is fixed with servo motor (103)；Servo motor (103) output shaft passes through shaft coupling (104) and center rotary column (11) one
The fixed short axle in surface is fixedly connected.
3. a kind of oil pump noise detection device according to claim 1, which is characterized in that first connecting plate (302)
One side is fixed with auxiliary locking sliding block (305)；(305) one surface of auxiliary locking sliding block is threaded with third locking screw
It follows closely (306).
4. a kind of oil pump noise detection device according to claim 1, which is characterized in that the interior triangular connects cylinder
(303) one inner walls are fixed with magnet (304).
5. a kind of oil pump noise detection device according to claim 1, which is characterized in that the upright support bar (401)
One end face is fixed with bottom support plate (402)；(402) one surface linear of the bottom support plate arrangement is fixed with several cylinder columns
Platform (403)；(403) one surface of cylinder pylon is fixed with triangular prism (404)；The triangular prism (404) and interior triangular connect
Cylinder (303) inner wall is connect to be slidably matched.
6. a kind of oil pump noise detection device according to claim 1, which is characterized in that top braces cylinder (8) table
Face is coated with attraction coating.
7. a kind of oil pump noise detection device according to claim 1, which is characterized in that center rotary column (11) side
Face is fixed with stop flange (111).
8. a kind of oil pump noise detection device according to claim 1, which is characterized in that the cylindrical linear rail (10)
One surface is equipped with graduation mark.
9. a kind of oil pump noise detection device according to claim 1, which is characterized in that the upright support bar (401)
One surface is equipped with graduation mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810855615.0A CN109027541A (en) | 2018-07-31 | 2018-07-31 | A kind of oil pump noise detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810855615.0A CN109027541A (en) | 2018-07-31 | 2018-07-31 | A kind of oil pump noise detection device |
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| CN109027541A true CN109027541A (en) | 2018-12-18 |
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| CN201810855615.0A Pending CN109027541A (en) | 2018-07-31 | 2018-07-31 | A kind of oil pump noise detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307275A (en) * | 2020-03-17 | 2020-06-19 | 河南工程学院 | A remote blasting vibration signal acquisition device |
| CN118482812A (en) * | 2024-05-13 | 2024-08-13 | 珠海精实测控技术股份有限公司 | A multi-point noise detection device |
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Application publication date: 20181218 |