CN107965459A - A kind of device for preventing impeller wheel of centrifugal machine from inverting - Google Patents
A kind of device for preventing impeller wheel of centrifugal machine from inverting Download PDFInfo
- Publication number
- CN107965459A CN107965459A CN201711424520.5A CN201711424520A CN107965459A CN 107965459 A CN107965459 A CN 107965459A CN 201711424520 A CN201711424520 A CN 201711424520A CN 107965459 A CN107965459 A CN 107965459A
- Authority
- CN
- China
- Prior art keywords
- ratchet
- centrifugal machine
- impeller wheel
- pawl
- control device
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 230000008878 coupling Effects 0.000 claims abstract description 11
- 238000010168 coupling process Methods 0.000 claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000523 sample Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000000875 corresponding effect Effects 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000005611 electricity Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004577 thatch Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Centrifugal Separators (AREA)
Abstract
The present invention provides a kind of device for preventing impeller wheel of centrifugal machine from inverting, including ratchet, pawl, connecting rod, electric device and control device, ratchet is socketed on the transmission shaft or shaft coupling of centrifuge, one end of pawl is hinged with fixed pedestal, pawl is rotated around tie point to fasten with the ratchet of ratchet, one end in the middle part of pawl with connecting rod is hinged, and the other end and the electric device of connecting rod are hinged, and electric device is electrically connected with control device.When control device receives the signal of centrifuge transmission shaft reversion, control electric device drives connecting rod swing, pawl is rotated around tie point and fastens with the ratchet of ratchet, is inverted so as to fulfill impeller wheel of centrifugal machine is prevented.The present invention is not only simple in structure, cost is low, easy for installation, moreover it is possible to realizes that automatic anti-reverse turns, braking is sensitive, effectively improves reliability and security when centrifuge is shut down.
Description
Technical field
The present invention relates to a kind of device of equipment safety operation, belongs to machine-building and instrument automation field, specifically relates to
A kind of and device for preventing impeller wheel of centrifugal machine from inverting.
Background technology
China's cooling tower in the industries such as power plant, chemical plant and smeltery is applied extensively at present, is mainly used to reduce
The water temperature of cycling use of water, its operation principle are that the water to be got off using top centrifugal blower from bottom drawing and being spilt from above is formed pair
Stream, drains heat source, a part of water evaporates in convection current, takes away corresponding evaporation latent heat, so as to reduce the temperature of water.One group cool
Water tower is made of two or four Fans mostly, wherein one because electrical fault or maintenance need when, it is anti-by fan airflow around
Often there is the phenomenon inverted in the influence of pumping, blade, and rotating speed can be getting faster, and cause maintenance difficult, and electric current is run high during start, sternly
Component can be caused to damage during weight, blade broken, which flies out, to cause the accident.
In addition, in petrochemical industry, since medium is dirtier, some more important centrifugal pumps or trailing plants thatch wind turbine are because stopping outlet
Returning the reasons such as valve corrosion or blocking causes seal failure, when power failure is tripped, since outlet mesohigh material moves back to entrance,
Impeller high speed reverse rotation, causes equipment damage even combustion explosion accident to occur.Therefore, design one kind prevents impeller wheel of centrifugal machine from inverting
Testing agency and the device that prevents it from inverting, ensure small investment, installation is simple, can extensive utilization arrive association area, with ten
Divide important meaning.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of device for preventing impeller wheel of centrifugal machine from inverting, and monitor leaf in real time
The steering of wheel and rotating speed, can realize that automatic anti-reverse turns, and improve reliability and security when centrifuge is shut down.
In order to solve the above technical problems, the technical solution adopted in the present invention is：It is a kind of to prevent what impeller wheel of centrifugal machine from inverting
Device, including ratchet, pawl, connecting rod, electric device and control device, ratchet are socketed in the transmission shaft or shaft coupling of centrifuge
On, one end and the fixed pedestal of pawl are hinged, and pawl is rotated around tie point to fasten with the ratchet of ratchet, pawl middle part and connecting rod
One end be hinged, the other end and the electric device of connecting rod are hinged, and electric device is electrically connected with control device.
In preferable scheme, the ratchet is equipped with inversion detector, and inversion detector is fixedly connected with ratchet, built in it
There is steel ball and spring, one end of spring is connected with inversion detector inner wall, and the other end of spring is connected with steel ball, remote in steel ball
The side wall of spring is additionally provided with sensor.
In preferable scheme, the sensor is pressure type sensor, capacitance type sensor or travel switch.
In preferable scheme, the ratchet is equipped with multiple connection through holes, and the bolt of shaft coupling passes through connection through hole and spine
Wheel is fixedly connected.
In preferable scheme, speed probe is equipped with around the ratchet, speed probe is electrically connected with control device.
In preferable scheme, rotation direction sensor is equipped with around the ratchet, rotation direction sensor is electrically connected with control device.
It is staggered around ratchet before and after the speed probe and rotation direction sensor in preferable scheme.
In preferable scheme, the electric device is the solenoid valve that a drive link is swung.
In preferable scheme, the control device is PLC controller, when speed probe received by PLC controller
When meeting the chain condition of setting at the same time with the signal of rotation direction sensor, control device just exports the execution of signal designation electric device
Corresponding actions.
In preferable scheme, the control device, which is equipped with, turns to rotating speed integral type display table, by GO TO table and revolution counter
It is combined into one, shows the rotating speed and positive and reverse steering of centrifuge transmission shaft.
The present invention provides a kind of device for preventing impeller wheel of centrifugal machine from inverting, and by using above-mentioned structure, works as control device
When receiving the signal of centrifuge transmission shaft reversion, control electric device drives connecting rod swing, make pawl rotate around tie point and
The ratchet of ratchet fastens, and is inverted so as to fulfill impeller wheel of centrifugal machine is prevented.The present invention is not only simple in structure, cost is low, installation side
Just, moreover it is possible to realize that automatic anti-reverse turns, braking is sensitive, effectively improves reliability and security when centrifuge is shut down.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is the main structure diagram of the present invention；
Fig. 2 is ratchet scheme of installation in the present invention；
In figure：Ratchet 1, pawl 2, connecting rod 3, electric device 4, control device 5, inversion detector 6, connects through hole 7, revolution speed sensing
Device 8, rotation direction sensor 9, turns to rotating speed integral type and shows table 10, sensor 11, shaft coupling 12.
Embodiment
In order that those skilled in the art will better understand the technical solution of the present invention, with reference to embodiment to this hair
It is bright to be described in further detail.
In Fig. 1-2, a kind of device for preventing impeller wheel of centrifugal machine from inverting, including ratchet 1, pawl 2, connecting rod 3, electric device
4 and control device 5, ratchet 1 be socketed on the shaft coupling of centrifuge, 2 one end of pawl is hinged with fixed pedestal, and pawl 2 is around connection
Point rotation and the ratchet of ratchet 1 fasten, and the middle part of pawl 2 and one end of connecting rod 3 are hinged, the other end and the electric device 4 of connecting rod 3
Hinged, electric device 4 is electrically connected with control device 5.
In preferable scheme, the ratchet 1 is equipped with inversion detector 6, and inversion detector 6 is fixedly connected with ratchet 1, its
Steel ball and spring is built-in with, one end of spring is connected with 6 inner wall of inversion detector, and the other end of spring is connected with steel ball, in steel
Side wall of the ball away from spring is additionally provided with sensor 11.When ratchet 1 because have a power failure or other reasons abruptly start to accelerate reversion when, steel ball
Sensitive switch is knocked because of inertia against the force of the spring, is simultaneously emitted by magnetic signal；When ratchet 1 is inverted in artificial jiggering, because anti-
The acceleration turned is smaller, and the inertia of steel ball is not enough to overcome the resistance of spring, it is impossible to sensitive switch is touched, so that automatic distinguishing leaf
Wheel reversion is reversion caused by artificial jiggering.
In preferable scheme, the ratchet 1 is equipped with multiple connection through holes 7, the bolt of shaft coupling through connection through hole 7 with
Ratchet 1 is fixedly connected, and ratchet is installed among two half block shaft couplings 12 or is connected with wherein any one 12 bolt of shaft coupling
（Ratchet is half block at this time）, facilitate dismounting and change.
In preferable scheme, speed probe 8, speed probe 8 and the electricity of control device 5 are equipped with around the ratchet 1
Connection, by detecting the magnet pulse signal with ratchet, speed probe 8 measures the rotating speed of ratchet 1 in real time, and by tach signal
Pass to control device 5.
In preferable scheme, rotation direction sensor 9, rotation direction sensor 9 and the electricity of control device 5 are equipped with around the ratchet 1
Connection, when the rotating speed of ratchet 1 accelerates to invert by zero suddenly, after rotation direction sensor 9 receives the signal of inversion detector 6, in time
Feed back to control device 5.
It is staggered in the lower section of ratchet 1 before and after the speed probe 8 and rotation direction sensor 9 in preferable scheme,
The rotating speed of detection ratchet 1 and steering in real time respectively.
In preferable scheme, the electric device 4 is the solenoid valve that a drive link is swung, when receiving control device 5
Signal when produce electromagnetism to attract connecting rod swing, pawl is rotated around tie point and fasten with the ratchet of ratchet, so as to reach
The purpose for preventing impeller wheel of centrifugal machine from inverting.
In preferable scheme, the control device 5 is PLC controller, when speed probe received by PLC controller
8 and the signal of rotation direction sensor 9 when meeting set chain condition at the same time, PLC controller just exports the electronic dress of signal designation
Put 4 execution corresponding actions.The chain condition set in the present embodiment as：When rotation direction sensor 9 received by PLC controller
During reverse signal, the rotating speed of speed probe 8 becomes larger, and rotating speed >=20r/min.When ratchet 1, which rotates forward, to slow down, even if steel
Ball touch sensor 11, and rotating speed >=20r/min, can not trigger the chain output signal of PLC controller, so as to distinguish centrifugation
The normal of machine runs slowly, it is ensured that anti-reverse mechanism will not maloperation.
In preferable scheme, the control device 5, which is equipped with, turns to rotating speed integral type display table 10, by GO TO table and rotating speed
Table is combined into one, show centrifuge transmission shaft rotating speed and positive and reverse steering, be simple to manufacture, cost it is relatively low.
The present invention provide it is a kind of prevent impeller wheel of centrifugal machine invert device, including ratchet, pawl, connecting rod, electric device and
Control device, ratchet are socketed on the transmission shaft or shaft coupling of centrifuge, and one end and the fixed pedestal of pawl are hinged, and pawl can be around
Tie point is rotated to fasten with the ratchet of ratchet, and one end in the middle part of pawl with connecting rod is hinged, the other end and electric device of connecting rod
Hinged, electric device is electrically connected with control device.When ratchet rotates forward, controller is only capable of displaying rotating speed at this time, and steering is not shown,
Solenoid valve because not it is electric, pawl is backs out state；Have a power failure suddenly in motor or because other reasons, wheel speed are abruptly started to by zero
Reversion, and the more turns the more fast, sensor 1 receive tach signal and show >=20r/min when, steel ball is because of inertia against the force of the spring
And sensitive switch is knocked, magnetic signal is simultaneously emitted by, received signal is transmitted to PLC by speed probe and rotation direction sensor at the same time
Controller causes interlocking, and output signal designation solenoid valve drives connecting rod swing, pawl is rotated and the ratchet of ratchet around tie point
Fasten, inverted so as to fulfill impeller wheel of centrifugal machine is prevented.The present invention is not only simple in structure, cost is low, easy for installation, moreover it is possible to is realized
Automatic anti-reverse turns, and braking is sensitive, reliability and security when centrifuge is shut down is effectively improved, before having a vast market application
Scape.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as the limitation for the present invention, this hair
Technical characteristic in the technical solution that bright protection domain should be recorded with claim, including the technical solution of claim record
Equivalents are protection domain.Equivalent substitution i.e. within this range is improved, also within protection scope of the present invention.
Claims (10)
1. a kind of device for preventing impeller wheel of centrifugal machine from inverting, it is characterized in that：Including ratchet（1）, pawl（2）, connecting rod（3）, it is electronic
Device（4）And control device（5）, ratchet（1）It is socketed on the transmission shaft or shaft coupling of centrifuge, pawl（2）One end with it is solid
Determine pedestal to be hinged, pawl（2）Rotated around tie point and ratchet（1）Ratchet fasten, pawl（2）Middle part and connecting rod（3）One
End is hinged, connecting rod（3）The other end and electric device（4）It is hinged, electric device（4）With control device（5）It is electrically connected.
2. a kind of device for preventing impeller wheel of centrifugal machine from inverting according to claim 1, it is characterized in that：The ratchet（1）
Equipped with inversion detector（6）, inversion detector（6）With ratchet（1）It is fixedly connected, it is built-in with steel ball and spring, and the one of spring
End and inversion detector（6）Inner wall connects, and the other end of spring is connected with steel ball, and biography is additionally provided with side wall of the steel ball away from spring
Sensor（11）.
3. a kind of device for preventing impeller wheel of centrifugal machine from inverting according to claim 2, it is characterized in that：The sensor
（11）For pressure type sensor, capacitance type sensor or travel switch.
4. a kind of device for preventing impeller wheel of centrifugal machine from inverting according to claim 1, it is characterized in that：The ratchet（1）
Equipped with multiple connection through holes（7）, the bolt of shaft coupling, which passes through, connects through hole（7）With ratchet（1）It is fixedly connected.
5. a kind of device for preventing impeller wheel of centrifugal machine from inverting according to claim 1, it is characterized in that：The ratchet（1）
Surrounding is equipped with speed probe（8）, speed probe（8）With control device（5）It is electrically connected.
6. a kind of device for preventing impeller wheel of centrifugal machine from inverting according to claim 1, it is characterized in that：The ratchet（1）
Surrounding is equipped with rotation direction sensor（9）, rotation direction sensor（9）With control device（5）It is electrically connected.
7. a kind of device for preventing impeller wheel of centrifugal machine from inverting according to claim 5 or 6, it is characterized in that：The rotating speed
Sensor（8）And rotation direction sensor（9）It is front and rear staggered in ratchet（1）Around.
8. a kind of device for preventing impeller wheel of centrifugal machine from inverting according to claim 1, it is characterized in that：The electric device
（4）The solenoid valve swung for a drive link.
9. a kind of device for preventing impeller wheel of centrifugal machine from inverting according to claim 1,5 or 6, it is characterized in that：The control
Device processed（5）For PLC controller, when speed probe received by PLC controller（8）And rotation direction sensor（9）Signal it is same
During chain condition set by Shi Fuhe, control device（5）Just export signal designation electric device（4）Perform corresponding actions.
10. a kind of device for preventing impeller wheel of centrifugal machine from inverting according to claim 1, it is characterized in that：The control dress
Put（5）Table is shown equipped with rotating speed integral type is turned to（10）, GO TO table and revolution counter are combined into one, display centrifuge transmission shaft
Rotating speed and positive and reverse steering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711424520.5A CN107965459A (en) | 2017-12-25 | 2017-12-25 | A kind of device for preventing impeller wheel of centrifugal machine from inverting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711424520.5A CN107965459A (en) | 2017-12-25 | 2017-12-25 | A kind of device for preventing impeller wheel of centrifugal machine from inverting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107965459A true CN107965459A (en) | 2018-04-27 |
Family
ID=61995831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711424520.5A Pending CN107965459A (en) | 2017-12-25 | 2017-12-25 | A kind of device for preventing impeller wheel of centrifugal machine from inverting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107965459A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209908A (en) * | 2018-07-27 | 2019-01-15 | 合肥皖化电机技术开发有限责任公司 | A kind of shaft auxiliary device for furnace water pump |
| CN110275046A (en) * | 2019-07-16 | 2019-09-24 | 攀钢集团攀枝花钢钒有限公司 | Detection system for motor direction of rotation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2329162A1 (en) * | 1999-12-21 | 2001-06-21 | Tecumseh Products Company | Motor reversal switching system |
| CN104079114A (en) * | 2014-07-11 | 2014-10-01 | 烟台北方星空自控科技有限公司 | Ratchet wheel device for preventing motor from reversing |
| CN104682814A (en) * | 2013-11-29 | 2015-06-03 | 台达电子工业股份有限公司 | Fan air-return-preventing system and fan air-return-preventing method |
| CN206617077U (en) * | 2017-04-05 | 2017-11-07 | 陈志忠 | A kind of rolling screen door braking protection device |
| CN207777228U (en) * | 2017-12-25 | 2018-08-28 | 湖北三宁化工股份有限公司 | A kind of device for preventing impeller wheel of centrifugal machine from inverting |
-
2017
- 2017-12-25 CN CN201711424520.5A patent/CN107965459A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2329162A1 (en) * | 1999-12-21 | 2001-06-21 | Tecumseh Products Company | Motor reversal switching system |
| CN104682814A (en) * | 2013-11-29 | 2015-06-03 | 台达电子工业股份有限公司 | Fan air-return-preventing system and fan air-return-preventing method |
| CN104079114A (en) * | 2014-07-11 | 2014-10-01 | 烟台北方星空自控科技有限公司 | Ratchet wheel device for preventing motor from reversing |
| CN206617077U (en) * | 2017-04-05 | 2017-11-07 | 陈志忠 | A kind of rolling screen door braking protection device |
| CN207777228U (en) * | 2017-12-25 | 2018-08-28 | 湖北三宁化工股份有限公司 | A kind of device for preventing impeller wheel of centrifugal machine from inverting |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209908A (en) * | 2018-07-27 | 2019-01-15 | 合肥皖化电机技术开发有限责任公司 | A kind of shaft auxiliary device for furnace water pump |
| CN110275046A (en) * | 2019-07-16 | 2019-09-24 | 攀钢集团攀枝花钢钒有限公司 | Detection system for motor direction of rotation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207777228U (en) | A kind of device for preventing impeller wheel of centrifugal machine from inverting | |
| US7843077B2 (en) | Pulsed energy transfer | |
| CN107965459A (en) | A kind of device for preventing impeller wheel of centrifugal machine from inverting | |
| CN103443455B (en) | The overspeed protection system of test wind turbine | |
| CN107606300B (en) | A kind of plasma discharge rotary valve control method of food processor | |
| SE535025C2 (en) | Wind turbines and a method for operating a wind turbine | |
| CN109403728A (en) | A kind of motor speed detection method for locking automatically | |
| CN110159494A (en) | A kind of standalone module for wind-powered electricity generation measurement of fan speed and protection | |
| SE521649C2 (en) | Method and apparatus for monitoring a transmission part | |
| CN208236579U (en) | A kind of vibration and wheel speed measuring device for wind power generating set | |
| TW201305564A (en) | Wind-speed detector | |
| KR101134981B1 (en) | A appratus for wind tunnel testing of wind power generator with large size blade | |
| JP2009538114A5 (en) | ||
| CN203021794U (en) | Intelligent deceleration clutch for washing machine | |
| CN201032483Y (en) | Running state indication device of heat radiating fun | |
| CN105742131B (en) | Miniature circuit breaker performs device and its control method | |
| CN202648934U (en) | Water turbine generator set machinery over-speed device verification platform | |
| CN106762772A (en) | A kind of real-time measurement apparatus of blower fan torque | |
| CN202119785U (en) | Direct-driven motor rotator speed measuring device | |
| CN201343399Y (en) | Microcomputer rotary position-limiting and speed-limiting combination switch | |
| WO2010049908A4 (en) | A dropped charge protection system and a monitoring system | |
| CN101290157A (en) | Air blast flux device for forced-ventilated gas water heater | |
| CN206447207U (en) | Belt slippage warning system between dedusting | |
| CN110374821A (en) | Wind power plant with measuring device | |
| CN107762727B (en) | Control method and control system for wind turbine generator set emergency feathering |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |