CN109277145A - A kind of application of soft activator in the coaxial crusher of bi-motor - Google Patents
A kind of application of soft activator in the coaxial crusher of bi-motor Download PDFInfo
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- CN109277145A CN109277145A CN201811079213.2A CN201811079213A CN109277145A CN 109277145 A CN109277145 A CN 109277145A CN 201811079213 A CN201811079213 A CN 201811079213A CN 109277145 A CN109277145 A CN 109277145A
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- motor
- crusher
- coaxial
- soft activator
- fixedly connected
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/30—Driving mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/1004—Structural association with clutches, brakes, gears, pulleys or mechanical starters with pulleys
- H02K7/1008—Structural association with clutches, brakes, gears, pulleys or mechanical starters with pulleys structurally associated with the machine rotor
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Power Engineering (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
The present invention relates to crusher technical fields, application of in particular a kind of soft activator in the coaxial crusher of bi-motor, including the coaxial crusher of bi-motor, soft activator and distribution transformer, the model PF1620 impact breaker of the coaxial crusher of bi-motor, the coaxial crusher of bi-motor includes upper casing, one end screw of the upper casing close to ground is connected with lower casing, the side wall screw of the lower casing is connected with first bearing seat, the lower casing is connected with second bearing seat far from one end screw of first bearing seat, main shaft is socketed on the inner wall of the first bearing seat and second bearing seat, the main shaft is socketed with the first big belt wheel close to one end of first bearing seat, the main shaft is socketed with the second big belt wheel close to one end of second bearing seat, it is fixedly connected on the outer wall of first big belt wheel First driving belt.The present invention extends the service life of crusher by the application of soft activator, improves utilization rate of equipment and installations.
Description
Technical field
The answering in the coaxial crusher of bi-motor the present invention relates to crusher technical field more particularly to a kind of soft activator
With.
Background technique
Today's society, with increasingly exhausted and environment the destruction of resource, country and society are to environmental protection and section
The degree of concern of energy emission reduction is higher and higher, this just forces us that must pay attention to environment guarantor while to resource rational exploitation and utilization
Shield.Under such overall background, sandstone aggregate industry also has to improve traditional production method, production scale, operation side
Formula adapts to the law of competition of " survival of the fittest, the survival of the fittest ".With the continuous innovation of modernization science and technology, digitlization, intelligence
Also it is gradually dissolved into our traditional mining machinery industries, powerful device is by traditional reduced-voltage starting gradually by soft activator
Starting, variable frequency starting replace, and various kinds of sensors, controller etc. are also widely used in crusher.It is struck back herein for heavy type
The problem of double soft activator bi-motor startings of formula crusher encounter in actual use is analyzed and proposes corresponding solution.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of soft activator proposed is in double electricity
Application in the coaxial crusher of machine.
To achieve the goals above, present invention employs following technical solutions:
A kind of application of soft activator in the coaxial crusher of bi-motor, including the coaxial crusher of bi-motor, soft activator
And distribution transformer, the model PF1620 impact breaker of the coaxial crusher of bi-motor, the bi-motor are coaxially broken
Broken machine includes upper casing, and one end screw of the upper casing close to ground is connected with lower casing, the side wall spiral shell of the lower casing
Nail is connected with first bearing seat, and the lower casing is connected with second bearing seat far from one end screw of first bearing seat, and described the
Main shaft is socketed on one bearing block and the inner wall of second bearing seat, the main shaft is socketed with close to one end of first bearing seat
First big belt wheel, the main shaft are socketed with the second big belt wheel close to one end of second bearing seat, first big belt wheel it is outer
It is fixedly connected with the first driving belt on wall, the second driving belt is fixedly connected on the outer wall of second big belt wheel, it is described
First driving belt is fixedly connected with the first small pulley far from one end of the first big belt wheel, and first small pulley is far from lower casing
One end be fixedly connected with 1# motor, second driving belt is fixedly connected with the second small band far from one end of the second big belt wheel
Wheel, second small pulley are fixedly connected with 2# motor far from one end of lower casing, and the upper casing is close to the first big belt wheel
One end screw is connected with the first side observation window, and the upper casing is connected with second side observation close to one end screw of the second big belt wheel
Window, the upper casing are fixedly connected with upper adjusting screw rod far from the one end on ground, and screw thread connects on the upper outer wall for adjusting screw rod
It is connected to adjusting nut, the upper adjusting nut, which passes through upper casing and keeps off, is connected to adjustment spring, and the upper adjusting screw rod is remote
One end from upper adjusting nut is fixedly connected with upper impact rack, and the side wall upper bearing (metal) of the upper impact rack is connected with impact rack
Axis is fixedly connected with middle adjusting screw rod on the middle side wall of the upper casing, is threaded on the middle outer wall for adjusting screw rod
Middle adjusting nut, the middle adjusting nut are connected to middle adjustment spring close to one end of upper casing gear, and the middle adjusting screw rod is separate
One end of middle adjusting nut is fixedly connected with middle impact rack, and the side wall upper bearing (metal) of the middle impact rack is connected with middle impact rack axis,
The upper casing is close to one end of middle adjusting nut and the position on close ground is fixed with lower adjusting screw rod, the lower adjusting
Lower adjusting nut is threaded on the outer wall of screw rod, the lower adjusting nut is connected to lower adjusting bullet close to one end of upper casing gear
Spring, the lower adjusting screw rod are fixedly connected with expansion frame far from one end of lower adjusting nut, on the side wall of the lower adjusting nut
Bearing is connected with expansion frame axis, on the outer wall of the main shaft and is located at the inside of lower casing and is fixedly connected with rotor roller,
The upper casing is connected with top observation window far from one end screw on ground.
Preferably, the online soft activator of model FJR-320KW-X of the soft activator carries high-power strength and dissipates
Hot-air fan.
Preferably, the 1# electrical connection of motor soft activator, another soft activator of the 2# electrical connection of motor.
Preferably, the 1# motor and 2# motor are electrically connected distribution transformer.
Preferably, the model S11-800/10-0.4 transformer of the distribution transformer, cable is copper wire, counterattack
When broken starting, completely there was only the equipment electricity consumption.
Preferably, the 1# motor and 2# motor are 220KW, rated current 415A, voltage rating 380V.
Preferably, the revolving speed of the main shaft and rotor roller is 499r/min, and the weight of rotor roller is 1T.
Preferably, it has follow steps:
Step 1: the coaxial crusher of bi-motor is selected；
Step 2: selecting soft activator, and the soft activator is equipped with two；
Step 3: production line power supply and distribution transformer.
Compared with prior art, the application the invention proposes a kind of soft activator in the coaxial crusher of bi-motor, tool
Have it is following the utility model has the advantages that
The present invention will be used to solve soft activator problem in bi-motor crusher use process.
The present invention passes through the application of 2 online soft activators of FJR-320KW-X, relative to traditional reduced-voltage starting, tool
There is electric wiring is succinct, component is few, reliable and stable, maintenance workload is few, starting is steady be convenient for control, change turning for motor
The advantages that square and starting characteristic, to the loss of power supply line and to machinery when solving high-power threephase asynchronous motor starting
The problems such as equipment is impacted extends the service life of crusher, improves the advantages of utilization rate of equipment and installations.
In the present invention, it is not directed to part in the device and is the same as those in the prior art or can be realized by using the prior art.
Detailed description of the invention
Fig. 1 is a kind of 1# motor drive direction three of application of the soft activator proposed by the present invention in the coaxial crusher of bi-motor
Tie up schematic diagram；
Fig. 2 is a kind of 2# motor drive direction three of application of the soft activator proposed by the present invention in the coaxial crusher of bi-motor
Tie up schematic diagram；
Fig. 3 is a kind of diagrammatic cross-section of application of the soft activator proposed by the present invention in the coaxial crusher of bi-motor；
Fig. 4 is that a kind of component connection of application of the soft activator proposed by the present invention in the coaxial crusher of bi-motor is shown
It is intended to.
In figure: the coaxial crusher of 1- bi-motor, 2- lower casing, 3- first bearing seat, 4- second bearing seat, the big band of 5- first
Wheel, the second big belt wheel of 6-, the first driving belt of 7-, the second driving belt of 8-, the first small pulley of 9-, the second small pulley of 10-, 11-
1# motor, 12-2# motor, the first side 13- observation window, 14- second side observation window, adjust on 15- screw rod, the top 16- observation window,
The upper impact rack of 17-, 18- upper adjustment spring adjust screw rod, adjustment spring in 20- in 19-, adjust silk under impact rack, 22- in 21-
Adjustment spring under bar, 23-, 24- expansion frame, 25- rotor roller, 26- main shaft, the upper adjusting nut of 27-, adjusting nut in 28-,
The upper impact rack axis of adjusting nut, 30- under 29-, impact rack axis in 31-, 32- expansion frame axis, 33- upper casing, 34- soft activator,
35- distribution transformer.
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 every other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", "top",
The orientation or positional relationship of the instructions such as "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just
In description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore be not considered as limiting the invention.
Please refer to Fig. 1-4, a kind of application of soft activator in the coaxial crusher of bi-motor, including a kind of soft activator exist
Application in the coaxial crusher of bi-motor, including the coaxial crusher 1 of bi-motor, soft activator 34 and distribution transformer 35, double electricity
The model PF1620 impact breaker of the coaxial crusher 1 of machine, the coaxial crusher 1 of bi-motor include upper casing 33, upper machine
One end screw of the shell 33 close to ground is connected with lower casing 2, and the side wall screw of lower casing 2 is connected with first bearing seat 3, lower casing
2 one end screws far from first bearing seat 3 are connected with second bearing seat 4, on the inner wall of first bearing seat 3 and second bearing seat 4
It is socketed with main shaft 26, main shaft 26 is socketed with the first big belt wheel 5 close to one end of first bearing seat 3, and main shaft 26 is close to
One end of two bearing bracket 4 is socketed with the second big belt wheel 6, and the first driving belt 7 is fixedly connected on the outer wall of the first big belt wheel 5,
The second driving belt 8, the one end of the first driving belt 7 far from the first big belt wheel 5 are fixedly connected on the outer wall of second big belt wheel 6
It is fixedly connected with the first small pulley 9, the first small pulley 9 is fixedly connected with 1# motor 11, the second transmission far from one end of lower casing 2
Belt 8 is fixedly connected with the second small pulley 10 far from one end of the second big belt wheel 6, the second small pulley 10 far from lower casing 2 one
End is fixedly connected with 2# motor 12, and upper casing 33 is connected with the first side observation window 13 close to one end screw of the first big belt wheel 5, on
Casing 33 is connected with second side observation window 14 close to one end screw of the second big belt wheel 6, and the one end of upper casing 33 far from ground is solid
Surely it is connected with and adjusts screw rod 15, be threaded with adjusting nut 27, upper adjusting nut 27 on the upper outer wall for adjusting screw rod 15
Across upper casing 33 and gear is connected to upper adjustment spring 18, and upper adjusting screw rod 15 is fixedly connected far from one end of upper adjusting nut 27
There is upper impact rack 17, the side wall upper bearing (metal) of upper impact rack 17 is connected with impact rack axis 30, fixes on the middle side wall of upper casing 33
It is connected with middle adjusting screw rod 19, is threaded with middle adjusting nut 28 on the middle outer wall for adjusting screw rod 19, middle adjusting nut 28 leans on
One end gear of nearly upper casing 33 is connected to middle adjustment spring 20, and middle adjusting screw rod 19 is fixedly connected far from one end of middle adjusting nut 28
There is middle impact rack 21, the side wall upper bearing (metal) of middle impact rack 21 is connected with middle impact rack axis 31, and upper casing 33 is close to middle adjusting nut
The position on 28 one end and close ground is fixed with lower adjusting screw rod 22, is threaded on the lower outer wall for adjusting screw rod 22
Lower adjusting nut 29, lower adjusting nut 29 are connected to lower adjustment spring 23 close to one end of upper casing 33 gear, and lower adjusting screw rod 22 is remote
One end from lower adjusting nut 29 is fixedly connected with expansion frame 24, and the side wall upper bearing (metal) of lower adjusting nut 29 is connected with expansion frame axis
32, on the outer wall of main shaft 26 and it is located at the inside of lower casing 2 and is fixedly connected with rotor roller 25, upper casing 33 is far from ground
One end screw be connected with top observation window 16.
The online soft activator of model FJR-320KW-X of soft activator 34, carries high-power strength radiator fan.
1# motor 11 is electrically connected soft activator 34, and 2# motor 12 is electrically connected another soft activator 34.
1# motor 11 and 2# motor 12 are electrically connected distribution transformer 35.
The model S11-800/10-0.4 transformer of distribution transformer 35, cable is copper wire, when striking back broken starting,
Completely there was only the equipment electricity consumption.
1# motor 11 and 2# motor 12 are 220KW, rated current 415A, voltage rating 380V.
The revolving speed of main shaft 26 and rotor roller 25 is 499r/min, and the weight of rotor roller 25 is 1T.
Preferably, it has follow steps:
Step 1: the coaxial crusher 1 of bi-motor is selected；
Step 2: selecting soft activator 34, and soft activator 34 is equipped with two；
Step 3: production line power supply and distribution transformer 35.
The present invention passes through the application of 2 soft activators 34, relative to traditional reduced-voltage starting, succinct with electric wiring,
Component is few, reliable and stable, maintenance workload is few, starting is steadily convenient for control, the torque of change motor and starting characteristic etc.
Advantage is asked when solving high-power threephase asynchronous motor starting to the loss of power supply line and to mechanical equipment impact etc.
Topic extends the service life of crusher, improves the advantages of utilization rate of equipment and installations.
Case is embodied:
Embodiment 1: 2 250kw, band bypass contactor soft activator have been selected；
Embodiment 2: 2 online soft activators of FJR-320KW-X have been selected, high-power strength radiator fan is carried；
There are following problems after the practical debugging of the configuration of embodiment 1:
High-pressure side is caused to be tripped 1. starting current is excessively high；
2. soft activator starts the failures such as overlong time, overheating protection, overload protection；
3. impact breaker belt is shaken in start-up course；
4. bi-motor can not be started simultaneously by adjusting parameters in transformer allowed band；
The practical tune-up data of the configuration of embodiment 2 is as follows:
By the volume of data in the partial data and practical debugging process in table, it can be deduced that following two certainty
Property conclusion:
1. the relevant parameter of two soft activators 34 must be set unanimously；
According to the debugging result of the 1st, 2 two group of data: equipment normally starts, and 1# soft activator operates normally, 2# soft start
Device report starts time out fault.The reason of analysis 2# soft activator report starting time out fault is that the starting current of 2# soft activator is lower than
1# soft activator, torque not enough cause.It thus has adjusted cut-off current and conversion time this two parameter values is shown in 3,4 groups of data, mesh
Solve the problems, such as this to improve the staring torque of 2# soft activator or extend the starting time.But actual result is 2
Soft activator 34 reports starting time-out, and equipment can not also start, so the relevant parameter of two soft activators must be made to set one
It causes.
2. crusher belongs to heavy load starting, setting value at least 300% under current-limit mode, the capacity of distribution transformer 35 allows
Under conditions of, the starting time can be shortened by increasing cut-off current.
To sum up, by implementing and comparing, data sequence 5:1# current of electric 1460A, 2# current of electric in embodiment 2
1420A, cut-off current 340%, the starting time optimal of conversion time 40S, and 1# motor and 2# motor normally start and transport
Row.
In the present invention, in use, starting 1# motor 11 and 2# motor 12 by soft activator 34,1# motor 11 drives first
Small pulley 9 rotate, the first small pulley 9 by belt drive the first big belt wheel 5 rotation, 2# motor 12 drive the second small pulley 10 to
The opposite direction rotation of first small pulley 9, the second small pulley 10 drives the second big belt wheel 6 to rotate by belt, first
Under the collective effect of big belt wheel 5 and the second big belt wheel 6, main shaft 26 is driven to rotate, so that rotor roller 25 is driven to rotate, material
Into upper casing 33, hammered by rotor roller 25 broken, then being thrown to upper impact rack 17 again, to carry out hammering broken, then again anti-
Bouncing back into rotor roller 25, by rotor roller 25 to continue hammering broken, carries out repeatedly, material successively pass through impact rack 17,
Middle impact rack 21 and expansion frame 24, final material are hammered into shape to required granularity, are discharged from 2 bottom of lower casing.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of application of soft activator in the coaxial crusher of bi-motor, including the coaxial crusher of bi-motor (1), soft activator
(34) and distribution transformer (35), which is characterized in that the model PF1620 reaction type of the coaxial crusher of bi-motor (1) is broken
Broken machine, the coaxial crusher of bi-motor (1) include upper casing (33), one end screw of the upper casing (33) close to ground
It is connected with lower casing (2), the side wall screw of the lower casing (2) is connected with first bearing seat (3), and the lower casing (2) is separate
One end screw of first bearing seat (3) is connected with second bearing seat (4), the first bearing seat (3) and second bearing seat (4)
It is socketed on inner wall main shaft (26), the main shaft (26) is socketed with the first big belt wheel close to the one end of first bearing seat (3)
(5), the main shaft (26) is socketed with the second big belt wheel (6) close to the one end of second bearing seat (4), first big belt wheel
(5) it is fixedly connected on outer wall the first driving belt (7), is fixedly connected with second on the outer wall of second big belt wheel (6)
Driving belt (8), first driving belt (7) are fixedly connected with the first small pulley far from the one end of the first big belt wheel (5)
(9), first small pulley (9) is fixedly connected with 1# motor (11) far from the one end of lower casing (2), second driving belt
(8) one end far from the second big belt wheel (6) is fixedly connected with the second small pulley (10), and second small pulley (10) is far from lower machine
One end of shell (2) is fixedly connected with 2# motor (12), and one end screw of the upper casing (33) close to the first big belt wheel (5) connects
There is the first side observation window (13), one end screw of the upper casing (33) close to the second big belt wheel (6) is connected with second side observation
Window (14), the upper casing (33) are fixedly connected with far from the one end on ground and adjust screw rod (15), the upper adjusting screw rod
(15) it is threaded on outer wall adjusting nut (27), the upper adjusting nut (27) passes through upper casing (33) and keeps off and connects
Have upper adjustment spring (18), described upper one end for adjusting screw rod (15) separate upper adjusting nut (27) is fixedly connected with impact rack
(17), the side wall upper bearing (metal) of the upper impact rack (17) is connected with impact rack axis (30), the middle side wall of the upper casing (33)
On be fixedly connected with middle adjusting screw rod (19), be threaded with middle adjusting nut on the middle outer wall for adjusting screw rod (19)
(28), one end gear of the middle adjusting nut (28) close to upper casing (33) is connected to middle adjustment spring (20), the middle adjusting silk
Bar (19) is fixedly connected with middle impact rack (21) far from the one end of middle adjusting nut (28), on the side wall of the middle impact rack (21)
Bearing is connected with middle impact rack axis (31), the upper casing (33) close to middle adjusting nut (28) one end and close to ground
Position is fixed with lower adjusting screw rod (22), is threaded with lower adjusting nut on the lower outer wall for adjusting screw rod (22)
(29), one end gear of the lower adjusting nut (29) close to upper casing (33) is connected to lower adjustment spring (23), the lower adjusting silk
Bar (22) is fixedly connected with expansion frame (24) far from the one end of lower adjusting nut (29), on the side wall of the lower adjusting nut (29)
Bearing is connected with expansion frame axis (32), on the outer wall of the main shaft (26) and is located at the inside of lower casing (2) and is fixedly connected
Have rotor roller (25), the upper casing (33) is connected with top observation window (16) far from one end screw on ground.
2. a kind of application of the soft activator according to claim 1 in the coaxial crusher of bi-motor, which is characterized in that institute
The online soft activator of model FJR-320KW-X for stating soft activator (34), carries high-power strength radiator fan.
3. a kind of application of the soft activator according to claim 1 in the coaxial crusher of bi-motor, which is characterized in that institute
It states 1# motor (11) and is electrically connected soft activator (34), the 2# motor (12) is electrically connected another soft activator (34).
4. a kind of application of the soft activator according to claim 1 in the coaxial crusher of bi-motor, which is characterized in that institute
It states 1# motor (11) and 2# motor (12) and is electrically connected distribution transformer (35).
5. a kind of application of the soft activator according to claim 1 in the coaxial crusher of bi-motor, which is characterized in that institute
The model S11-800/10-0.4 transformer of distribution transformer (35) is stated, cable is copper wire, when striking back broken starting, completely
The only equipment electricity consumption.
6. a kind of application of the soft activator according to claim 1 in the coaxial crusher of bi-motor, which is characterized in that institute
It states 1# motor (11) and 2# motor (12) is 220KW, rated current 415A, voltage rating 380V.
7. a kind of application of the soft activator according to claim 1 in the coaxial crusher of bi-motor, which is characterized in that institute
The revolving speed for stating main shaft (26) and rotor roller (25) is 499r/min, and the weight of rotor roller (25) is 1T.
8. a kind of application of the soft activator according to claim 1 in the coaxial crusher of bi-motor, which is characterized in that tool
There are following steps:
Step 1: it selects the coaxial crusher of bi-motor (1)；
Step 2: selecting soft activator (34), and the soft activator (34) is equipped with two；
Step 3: production line power supply and distribution transformer (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811079213.2A CN109277145A (en) | 2018-09-14 | 2018-09-14 | A kind of application of soft activator in the coaxial crusher of bi-motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811079213.2A CN109277145A (en) | 2018-09-14 | 2018-09-14 | A kind of application of soft activator in the coaxial crusher of bi-motor |
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| Publication Number | Publication Date |
|---|---|
| CN109277145A true CN109277145A (en) | 2019-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811079213.2A Pending CN109277145A (en) | 2018-09-14 | 2018-09-14 | A kind of application of soft activator in the coaxial crusher of bi-motor |
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| CN (1) | CN109277145A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111558445A (en) * | 2020-05-06 | 2020-08-21 | 浙江川肯电气有限公司 | Special variable-voltage starter operating system for crusher |
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| CN111558445A (en) * | 2020-05-06 | 2020-08-21 | 浙江川肯电气有限公司 | Special variable-voltage starter operating system for crusher |
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Application publication date: 20190129 |
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| RJ01 | Rejection of invention patent application after publication |