CN114602798A - Supporting structure for obtaining material distribution, excitation control method and vibrating screen - Google Patents
Supporting structure for obtaining material distribution, excitation control method and vibrating screen Download PDFInfo
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- CN114602798A CN114602798A CN202210297610.7A CN202210297610A CN114602798A CN 114602798 A CN114602798 A CN 114602798A CN 202210297610 A CN202210297610 A CN 202210297610A CN 114602798 A CN114602798 A CN 114602798A
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- vibrating screen
- spring
- obtaining
- distribution
- distance measuring
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- 239000000463 material Substances 0.000 claims description 50
- 230000005284 excitation Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 9
- OIGNJSKKLXVSLS-VWUMJDOOSA-N prednisolone Chemical compound O=C1C=C[C@]2(C)[C@H]3[C@@H](O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 OIGNJSKKLXVSLS-VWUMJDOOSA-N 0.000 claims description 9
- 230000005483 Hooke's law Effects 0.000 claims description 5
- 238000003016 alphascreen Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D19/00—Control of mechanical oscillations, e.g. of amplitude, of frequency, of phase
- G05D19/02—Control of mechanical oscillations, e.g. of amplitude, of frequency, of phase characterised by the use of electric means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a supporting structure for obtaining material distribution, a vibration excitation control method and a vibrating screen, wherein the vibrating screen comprises a supporting structure, a vibrating screen body, a vibration exciter and a motor, the supporting structure comprises a spring base, spiral springs, a spring upper seat and a distance measuring sensor, at least one group of spiral springs is arranged on the spring base, the distance measuring sensor is arranged on the spring base at the central position of each group of spiral springs, and the other end of each group of spiral springs is connected with the spring upper seat; the vibration excitation control method of the vibrating screen is that the weight distribution of the materials is obtained according to the distance measurement data of the distance measurement sensor, and the vibration excitation frequency of the vibrating screen is further calculated, namely the vibration excitation frequency of the vibrating screen is regulated and controlled by utilizing the weight distribution of the materials. The invention has the following advantages: the invention solves the technical problems of inconvenient material weighing and inconvenient control of excitation frequency in the prior art, realizes the balance of energy conservation and optimal screening performance, and has the advantages of low cost and simple structure.
Description
Technical Field
The invention relates to the field of vibrating screens, in particular to a supporting structure for acquiring material distribution, a vibration excitation control method and a vibrating screen.
Background
The vibrating screen utilizes a vibration exciter as a vibration source to enable materials to be thrown up on a screen mesh and to move forwards in a linear mode, the materials enter a feeding hole of the vibrating screen from a feeding machine, and oversize materials and undersize materials of various specifications are generated through multiple layers of screen meshes and are respectively discharged from respective outlets. The vibrating screen is generally divided into a circular vibrating screen and a linear vibrating screen, and can be applied to occasions needing screening, such as buildings, chemical engineering, mineral processing and the like.
At present, the shale shaker among the prior art can predetermine vibration frequency, if the material is less or not need so high vibration frequency, then need the manual regulation vibration gear. In addition, when there are too many materials or the material particle diameter is large, the screening effect of the vibrating screen with the preset vibration frequency is not good.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides the following technical scheme:
the utility model provides an acquire bearing structure of material distribution, includes multiunit supporting component, supporting component includes spring base, coil spring, spring seat of honour and range finding sensor, set up a set of coil spring at least on the spring base it all installs range finding sensor to lie in every group coil spring central point department of putting on the spring base, and the other end and the spring seat of honour of every group coil spring link to each other, range finding sensor is used for measuring the distance of spring base to spring seat of honour.
Furthermore, the spring base is connected with the support frame.
Furthermore, the spring upper seat is fixedly connected to the vibrating screen.
Further, the distance measuring sensor adopts a non-contact distance measuring sensor.
Furthermore, the distance measuring sensors in the multiple groups of supporting assemblies obtain the weight distribution condition of the materials on the vibrating screen according to the distance measuring data.
The invention also provides a vibrating screen with the support structure for acquiring the material distribution, which further comprises a vibrating screen body, a vibration exciter and a motor, wherein at least one group of support structures is respectively arranged at the front end and the rear end of the vibrating screen body, each group of support structures comprises at least two support structures, and the support structures are symmetrically arranged at the left side and the right side of the vibrating screen body; the vibration exciter is arranged at the bottom of the screen of the vibrating screen, and the motor is connected with the vibration exciter.
The invention also provides a vibration excitation control method for obtaining the material distribution, which comprises the following steps:
obtaining ranging data of ranging sensors in a plurality of groups of supporting structures;
calculating the inclination variation of the vibrating screen and the arithmetic mean value of the measured values of all the ranging sensors according to the ranging data;
obtaining the equivalent material weight on the vibrating screen according to the length variation before and after the compression of the spiral spring and the arithmetic mean value of the actual measurement values of all the distance measuring sensors;
and calculating to obtain the vibration excitation frequency of the vibrating screen according to the equivalent material weight.
Further, the specific step of obtaining the equivalent material weight on the vibrating screen according to the length variation before and after the compression of the spiral spring and the arithmetic mean of the measured values of all the distance measuring sensors is as follows:
according to the length L of the coil spring before compression in each support structure, the length L is determined by hooke's law: δ F is δ H × k, and k is the spring constant of the spring, the calculation formula of the length change δ H before and after compression of the coil spring is: δ H δ F/k (L-H), where H is the arithmetic average of the measured values of each plurality of distance measuring sensors, the material weight m on the vibrating screen is equivalent to: and m is delta F/g is delta H k/g, and g is a gravity parameter.
Further, a calculation formula of the vibration exciting frequency f of the vibrating screen is as follows:
wherein
A＝A0[1+m/M]＝A0[1+(L-H)*k/Mg]，A0Taking 3-6(mm), wherein M is the weight of a screen mesh of the vibrating screen;
kv-the projectile intensity;
alpha-screen inclination (°);
delta-vibration direction angle (°).
Further, the sampling frequency of the ranging sensor is more than twice of 1/f.
The invention provides a supporting structure for obtaining material distribution, a vibration excitation control method and a vibrating screen, which have the following advantages: the method comprises the steps of arranging a plurality of distance measuring sensors in a supporting structure of the vibrating screen to achieve material weighing and physical distribution conditions, adjusting the feeding direction or the feeding speed according to the physical distribution conditions, and simultaneously achieving regulation and control of the vibration excitation frequency of the vibrating screen by utilizing equivalent material weight, so that the technical problems that materials are inconvenient to weigh and the vibration excitation frequency is inconvenient to control in the prior art are solved, energy conservation and balance of optimal screening performance are achieved, and the method also has the advantages of low cost and simple structure.
Drawings
FIG. 1 is a diagram of a support structure spring mount and coil spring configuration;
FIG. 2 is a diagram of a support structure spring upper seat;
FIG. 3 is a top view of a support structure spring mount;
FIG. 4 is a side view of a shaker;
FIG. 5 is a top view of a shaker screen;
fig. 6 is a structural diagram of the vibration exciter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. It should be understood that in the description of the embodiments of the present invention, the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, the present embodiment provides a support structure 01 for obtaining material distribution, including a plurality of sets of support components, where the support components include a spring base 011, a spiral spring 012, a spring upper seat 013, and a distance measuring sensor 014, where the spring base 011 is provided with 3 sets of spiral springs 012, the spring base 011 is provided with distance measuring sensors 014 installed at the center of each set of spiral springs 012, the other end of each set of spiral springs 012 is connected to the spring upper seat 013, and the distance measuring sensor 014 is configured to measure the distance from the spring base 011 to the spring upper seat 013.
Preferably, the spring base 011 is fixedly mounted on the supporting frame 015.
Preferably, the mounting plate of the spring upper seat 013 is provided with a reinforcing rib and is fixedly connected with the screen of the vibrating screen.
Preferably, the distance measuring sensor 014 may adopt a laser or ultrasonic distance measuring sensor, and the weight distribution of the material on the vibrating screen can be obtained through the obtained distance measuring data.
Example 2
Referring to fig. 4 to 6, based on the supporting structure 01 in embodiment 1, the present embodiment provides a vibrating screen for obtaining material distribution, further including a vibrating screen body, a vibration exciter 02, and a motor 03. The vibrating screen body is of a cuboid structure as a whole, two groups of supporting structures are respectively arranged at the front end and the rear end of the vibrating screen body, each group of supporting structures 01 comprises two supporting structures 01, and the supporting structures are symmetrically arranged at the left side and the right side of the vibrating screen body; the vibration exciter 02 is arranged at the bottom of the screen of the vibrating screen and is arranged side by side with the supporting structure, and the motor 03 is connected with the vibration exciter.
Preferably, the spring upper seats 013 of the two sets of support structures 01 are fixedly mounted on the vibrating screen mesh.
Preferably, the vibration exciters 02 are arranged at two ends of a bearing, and the bearing is arranged below the screen mesh of the vibrating screen.
Preferably, the motor 03 is mounted on the vibration exciter 02 on one side of the vibrating screen body.
Preferably, a distance measuring sensor 014 is installed at the center of each group of spiral springs 012 of the supporting structure, the distance measuring sensor 014 can transmit data in a wired or wireless manner, and if a wireless distance measuring sensor is adopted, a plurality of groups of distance measuring data can be transmitted to the control module for calculation in a ZigBee networking manner; if a wired distance measuring sensor is adopted, distance measuring data of a plurality of groups of distance measuring sensors can be collected through a 485 bus and transmitted to a control module for calculation.
Example 3
In this embodiment, based on the vibrating screen in embodiment 2, first, the control module obtains the distance measurement data of the distance measurement sensor 014 in each supporting structure 01, then calculates the load bearing of each supporting structure 01 according to hooke's law, thereby obtaining the weight distribution of the material, and adjusts the excitation frequency of the vibration exciter 02 according to the weight distribution of the material.
The vibration excitation control method of the vibrating screen comprises the following specific steps:
(1) obtaining the range data from each (3) range sensor 014 of each support structure 01 to obtain the tilt variation (δ X, δ Y), and accordingly, knowing the approximate material distribution;
(2) assuming that the range of data measured before compression of the coil spring 012 in each support structure 01 is 400 ± 0.5mm, according to hooke's law: δ F is δ H × k, and k is the spring constant, the calculation formula of the length change δ H before and after the compression of the coil spring 012 is: δ H is δ F/k (400-H), and H is an arithmetic average of measured values of all the range sensors 014.
(3) According to hooke's law, material m on the vibrating screen is equivalent to: and m is delta F/g is delta H k/g, and g is a gravity parameter.
(4) The calculation formula of the vibration excitation frequency f of the vibrating screen is as follows:
wherein
A＝A0[1+m/M]＝A0[1+(400-H)*k/Mg]，A0Taking 3-6(mm), wherein M is the mass of a screen of the vibrating screen;
kv-the projectile intensity;
alpha-screen inclination (°);
delta-vibration direction angle (°).
Preferably, during the operation, that is, during the material oscillation process, the vibration exciter 02 moves the screen of the vibrating screen, the coil spring 012 vibrates in an up-and-down compression manner, and the distance measurement data changes in real time, so the sampling frequency of the distance measurement sensor 014 is much greater than twice of 1/f.
Preferably, the arithmetic average H of the actual measurement values of all the distance measuring sensors 014 reflects the positive relationship between the distance measuring data and the weight of the material.
Preferably, in the calculation of the excitation frequency f, the projectile intensity KVThe inclination angle alpha of the screen is-10 degrees, the vibration direction angle delta can be selected as a fixed value, and is generally 45 degrees.
In conclusion, the plurality of distance measuring sensors are arranged in the supporting structure of the vibrating screen, so that the material weighing can be realized, meanwhile, the mass distribution condition of the material on the whole screen can be obtained according to the distance measuring data of the plurality of groups of distance measuring sensors, namely the inclination condition, the feeding position is adjusted according to the mass distribution of the material, the weight of the material is obtained according to the distance measuring data, the excitation frequency of the vibrating screen is further calculated, the optimal excitation frequency for processing the material is obtained, and the balance between the energy conservation and the optimal screening performance is realized.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an acquire bearing structure of material distribution, a serial communication port, includes multiunit supporting component, supporting component includes spring base, coil spring, spring seat of honour and range finding sensor, a serial communication port, set up at least a set of coil spring on the spring base it all installs range finding sensor to lie in every group coil spring central point department of putting on the spring base, and the other end and the spring seat of honour of every group coil spring link to each other, range finding sensor is used for measuring the distance of spring base to spring seat of honour.
2. The support structure for distribution of materials of claim 1, wherein the spring mount is connected to a support frame.
3. The support structure for obtaining distribution of material as claimed in claim 1, wherein said spring upper seat is fixed to the vibrating screen.
4. The support structure for obtaining distribution of material according to claim 1, wherein the distance measuring sensor is a non-contact distance measuring sensor.
5. The supporting structure for obtaining the distribution of the materials as claimed in claim 4, wherein the weight distribution of the materials on the screen of the vibrating screen is obtained according to the distance measurement data obtained by the distance measurement sensor.
6. A vibrating screen for obtaining material distribution is characterized by comprising the supporting structure, a vibrating screen body, a vibration exciter and a motor according to any one of claims 1 to 5, wherein at least one group of supporting structures is respectively arranged at the front end and the rear end of the vibrating screen body, each group of supporting structures comprises at least two supporting structures, and the supporting structures are symmetrically arranged at the left side and the right side of the vibrating screen body; the vibration exciter is arranged at the bottom of the screen of the vibrating screen, and the motor is connected with the vibration exciter.
7. A vibration excitation control method of a vibrating screen for obtaining material distribution is characterized by comprising the following steps:
obtaining ranging data of ranging sensors in a plurality of groups of supporting structures;
calculating the inclination variation of the vibrating screen and the arithmetic mean value of the measured values of all the ranging sensors according to the ranging data;
obtaining the equivalent material weight on the vibrating screen according to the length variation before and after the compression of the spiral spring and the arithmetic mean value of the actual measurement values of all the distance measuring sensors;
and calculating to obtain the vibration excitation frequency of the vibrating screen according to the equivalent material weight.
8. The vibration excitation control method of the vibrating screen for obtaining the material distribution as claimed in claim 7, wherein the specific steps of obtaining the equivalent material weight on the vibrating screen according to the length variation before and after the compression of the coil spring and the arithmetic mean of the actual measured values of all the distance measuring sensors are as follows:
according to the length L of the coil spring before compression in each support structure, the length L is determined by hooke's law: δ F is δ H × k, and k is the spring constant of the spring, the calculation formula of the length change δ H before and after compression of the coil spring is: δ H ═ δ F/k ═ L-H, H is the arithmetic mean of the measured values of each group of the plurality of ranging sensors, then the material weight m on the vibrating screen is equivalent to: and m is delta F/g is delta H k/g, and g is a gravity parameter.
9. The vibration excitation control method of the vibrating screen for obtaining the material distribution as claimed in claim 7 or 8, wherein the calculation formula of the vibration excitation frequency f of the vibrating screen is as follows:
wherein
A＝A0[1+m/M]＝A0[1+(L-H)*k/Mg]，A0Taking 3-6(mm), wherein M is the weight of a screen mesh of the vibrating screen;
kv-the projectile intensity;
alpha-screen inclination (°);
delta-vibration direction angle (°).
10. The excitation control method of a vibrating screen for obtaining material distribution as claimed in claim 9, wherein the sampling frequency of the distance measuring sensor is more than twice of 1/f.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210297610.7A CN114602798B (en) | 2022-03-24 | 2022-03-24 | Support structure for acquiring material distribution, excitation control method and vibrating screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210297610.7A CN114602798B (en) | 2022-03-24 | 2022-03-24 | Support structure for acquiring material distribution, excitation control method and vibrating screen |
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| CN114602798A true CN114602798A (en) | 2022-06-10 |
| CN114602798B CN114602798B (en) | 2024-02-23 |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2111638A (en) * | 1981-12-10 | 1983-07-06 | Binder Co Ag | Two-mass vibrating system |
| RU2394654C1 (en) * | 2009-05-21 | 2010-07-20 | Открытое акционерное общество "Российские железные дороги" (ОАО "РЖД") | Vibration screening machine |
| CN201751530U (en) * | 2010-05-13 | 2011-02-23 | 四川宏华友信石油机械有限公司 | Drilling fluid vibrating screen |
| CN107008645A (en) * | 2017-05-25 | 2017-08-04 | 吴荣山 | Inclined double-deck excited vibration screen device |
| CN107051879A (en) * | 2017-04-12 | 2017-08-18 | 柳州易农科技有限公司 | A kind of dressing machine automatic control system |
| CN107442401A (en) * | 2017-09-01 | 2017-12-08 | 济南大学 | A kind of double mass anti-resonance vibrating sifter |
| CN107552391A (en) * | 2017-09-18 | 2018-01-09 | 河海大学常州校区 | A kind of large-scale vibrating screen motor adjustment method and system |
| CN109530216A (en) * | 2019-01-11 | 2019-03-29 | 中国矿业大学 | A kind of four axis change linear uniform-thickness vibrating screen and method for oscillating of intelligent control |
| CN211488503U (en) * | 2019-12-05 | 2020-09-15 | 四川众鼎中药发展有限公司 | Multistage vibrating chinese-medicinal material sieving mechanism |
| KR102183314B1 (en) * | 2020-08-18 | 2020-11-26 | 민원 | Multilayer screen capable of controlling the magnitude of vibration displacement and its control method |
| CN112604943A (en) * | 2020-11-30 | 2021-04-06 | 温州竺陌机械科技有限公司 | Induction type material grading plant for construction machinery |
| CN112774968A (en) * | 2020-12-22 | 2021-05-11 | 临沂矿业集团有限责任公司 | Multifunctional screening device for coal mine |
| CN113295363A (en) * | 2021-05-28 | 2021-08-24 | 三一重机有限公司 | Vibration test method for battery pack support |
-
2022
- 2022-03-24 CN CN202210297610.7A patent/CN114602798B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2111638A (en) * | 1981-12-10 | 1983-07-06 | Binder Co Ag | Two-mass vibrating system |
| RU2394654C1 (en) * | 2009-05-21 | 2010-07-20 | Открытое акционерное общество "Российские железные дороги" (ОАО "РЖД") | Vibration screening machine |
| CN201751530U (en) * | 2010-05-13 | 2011-02-23 | 四川宏华友信石油机械有限公司 | Drilling fluid vibrating screen |
| CN107051879A (en) * | 2017-04-12 | 2017-08-18 | 柳州易农科技有限公司 | A kind of dressing machine automatic control system |
| CN107008645A (en) * | 2017-05-25 | 2017-08-04 | 吴荣山 | Inclined double-deck excited vibration screen device |
| CN107442401A (en) * | 2017-09-01 | 2017-12-08 | 济南大学 | A kind of double mass anti-resonance vibrating sifter |
| CN107552391A (en) * | 2017-09-18 | 2018-01-09 | 河海大学常州校区 | A kind of large-scale vibrating screen motor adjustment method and system |
| CN109530216A (en) * | 2019-01-11 | 2019-03-29 | 中国矿业大学 | A kind of four axis change linear uniform-thickness vibrating screen and method for oscillating of intelligent control |
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| KR102183314B1 (en) * | 2020-08-18 | 2020-11-26 | 민원 | Multilayer screen capable of controlling the magnitude of vibration displacement and its control method |
| CN112604943A (en) * | 2020-11-30 | 2021-04-06 | 温州竺陌机械科技有限公司 | Induction type material grading plant for construction machinery |
| CN112774968A (en) * | 2020-12-22 | 2021-05-11 | 临沂矿业集团有限责任公司 | Multifunctional screening device for coal mine |
| CN113295363A (en) * | 2021-05-28 | 2021-08-24 | 三一重机有限公司 | Vibration test method for battery pack support |
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| Publication number | Publication date |
|---|---|
| CN114602798B (en) | 2024-02-23 |
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