CN101694977B - Mechanical-electrical liquid mixing soft start stepless speed regulator - Google Patents
Mechanical-electrical liquid mixing soft start stepless speed regulator Download PDFInfo
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- CN101694977B CN101694977B CN2009102050485A CN200910205048A CN101694977B CN 101694977 B CN101694977 B CN 101694977B CN 2009102050485 A CN2009102050485 A CN 2009102050485A CN 200910205048 A CN200910205048 A CN 200910205048A CN 101694977 B CN101694977 B CN 101694977B
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Abstract
The invention discloses a mechanical-electrical liquid mixing soft start stepless speed regulator. One end of a high-speed input shaft is connected with a rotating shaft of a main motor, and the other end thereof is connected with external teeth of a high-speed solar wheel shaft so as to form backlash flotation; the high-speed solar wheel shaft is connected with a low-speed input shaft by being meshed with a high-speed planet wheel; the other end of the low-speed input shaft is connected with a low-speed output shaft which extends out of a speed regulator box body, and is taken as an output shaft of the speed regulator to be connected with load; a high-speed planet wheel shaft is externally fixedly provided with the high-speed planet wheel which is meshed with a high-speed internal gear; the high-speed internal gear is also meshed with a high-speed gear coupling which is fixedly connected with a big bevel gear of a speed adjusting mechanism; the big bevel gear of the speed regulating mechanism is connected with a hydraulic rotating functional element by a small bevel gear shaft of the speed regulating mechanism, an intermediate gear of the speed regulating mechanism and a side gear of the speed regulating mechanism; and the tail end of the small bevel gear shaft of the speed regulating mechanism is connected with the input shaft of an auxiliary motor. The speed regulator has high transmission efficiency, low noise, reliable performance and low cost.
Description
Technical field
The present invention relates to a kind of mechanical-electrical liquid mixing soft start stepless speed regulator.
Background technology
When motor starts in load, can produce the starting current of 5～7 times of rated current intensity, concerning high power motor, great start-up current can produce very big impact to motor and electrical network; And when shutting down, make rotating speed prompt drop to zero control mode also can bring impact to equipment through momentary power failure, and reduce useful life, so under a lot of operating modes, do not allow the instantaneous shutdown of high-power machinery equipment, need the shutdown of steadily slowing down; At work, need to consider the steady stepless speed regulation problem of the caused high-power machinery equipment of working conditions change equally.Solve the problems of the technologies described above, just need adopt soft start/stepless speed regulation technology, make it can realize controlled soft start, soft stop, stepless speed regulation, functions such as automatic overload protection and many driving powers balance powerful device.
In machinery, motor and multidisciplinary fields such as electronics, fluid power and hydraulic pressure soft start/stepless speed regulation technology has been carried out deeply and extensive studies both at home and abroad; Developed diversified soft start/speed regulating device or equipment, can be summed up as substantially: fluid-flywheel clutch soft start/speed governing, liquid viscosity soft start/speed governing, frequency control soft start, DC speed regulation soft start, power transformation resistance speed governing, friction speed-regulating, Hydraulic Adjustable Speed etc.Though respectively there are characteristics in these soft start/speed-regulating actuators or system, the shortcoming that also all has some can't make the user accept fully.Variable speed fluid coupling can change output speed and torque through the degree of filling of regulating working chamber liquid, has certain soft start function and speed governing ability.But long-term theoretical research and application practice show, it can't satisfy actual requirement far away on the function of soft start/speed governing and performance.The sticky shearing active force that liquid viscosity soft start/speed regulating device utilization is present in oil film between the driving and driven friction plate comes transferring power.This device can be realized stepless speed regulation and the synchronous operation between the master and slave moving axis within the specific limits, can carry out overload protection to drive system.But when soft start, motor is in the load starting state, and starting current is big, and the rush of current time is long, and the power of motor acts in the load through viscous torque, is not real No Load Start.Transmission efficiency is lower, and power loss is big, and heating is serious, and the device more complicated, and manufacturing and maintenance cost are higher.Frequency control soft start, DC speed regulation soft start, power transformation resistance speed governing, friction speed-regulating and Hydraulic Adjustable Speed etc. generally all adopt control main drive motor rotating speed or torque differences to reach two-way stepless speed regulation on electrical equipment control, guarantee that machine driven system seamlessly transits.But though RHVC has been realized soft start, right powerful frequency-variable controller price is very expensive, and circuit wherein and electronic devices and components maintenance difficult, and maintenance cost is high; The subject matter of DC continuous speed regulation/soft start is: high power direct-current motor is bulky, and costs an arm and a leg, and particularly the investment of transformer station is often very big, system complex.Under the environment of moist or many dirt, the commutator of DC motor, brushgear and silicon controlled control section need often to safeguard that maintenance cost is also very high.At present, the price of the price of high power DC governing system and big-power transducer is suitable.Though power transformation resistance speed governing also can realize soft start, power consumption is big, and power more greatly then use cost is high more, and control system is also more complicated, and it is also big more to take up room; Friction speed-regulating only is applicable to small-power, and when using when high-power, friction catch moment is big, and the frictional heating problem can't solve, and the friction speed-regulating mode is for big-and-middle-sized power master motor, and soft start also is far from being; Existing Hydraulic Adjustable Speed, though can realize soft start/stepless speed regulation, equipment is prone to leak, noise is big, temperature is high, environment is had pollution, and efficient is low, fault is many, thereby integral working is not good.In addition, also have some soft initiator devices, be mainly used in the start-up course of motor, its output only changes voltage and does not change frequency, does not possess functions such as stepless speed regulation and power-balance, is mainly used in non-important middle low power transmission occasion.
During large power overloading equipment work, also must solve a problem of output overloading being limit the square protection.Many main equipments (like high-power belt conveyor) are to be driven by multiple motors, and when real work, the loading condition that drives each motor in the drive system maybe be different more.How to adopt the stepless speed regulation speed reduction gearing to guarantee many driving powers balance in the drive system, thereby the support equipment smooth working also is a problem drive more.
Take a broad view of above-mentioned various soft start speed device, a kind of both can having accomplished keeping in the constant absence of main motor speed, realizes the two-way stepless speed regulation of output speed and seamlessly transits; Can make high-power machinery equipment master electric motor starting electric current realize soft start less than rated current again; Possess functions such as the square protection of output overloading limit and many driving powers balance simultaneously; And can also accomplish that simple in structure, reliable working performance, manufacturing and working service are with low cost.Be used for the powerful device in down-hole and explosive place for some, transmission device also must can be realized explosion prevention function.
Summary of the invention
Technical problem to be solved by this invention is; Deficiency to prior art; A kind of simple in structure, reliable working performance, manufacturing and the lower-cost mechanical-electrical liquid mixing soft start stepless speed regulator of working service are provided; Realize the mechanical soft start of high-power main motor with the small-power stand-by motor, the great start-up current when solving powerful device and starting produces the problem of impacting to electrical network; To the machine driving continuous control, realize frequent two-way smooth stepless speed-regulating, soft stop, the square protection of output overloading limit and many driving powers balance in the powerful device work with the continuous controllable property realization of fluid transmission.
For solving the problems of the technologies described above; The technical scheme that the present invention adopted is: a kind of mechanical-electrical liquid mixing soft start stepless speed regulator; Comprise the high speed level power shaft and the slow speed turbine stage output shaft that are fixed on the casing both sides through roller bearing; This high speed level power shaft one end stretches out casing and links to each other with the rotating shaft of main motor, it is characterized in that:
A, the said high speed level power shaft other end offer first endoporus and it is outside through the sheathed high speed level of roller bearing planet carrier; Be provided with the involute spline internal tooth in this first endoporus; One end external tooth of this involute spline internal tooth and high speed level sun wheel shaft connects and composes backlash and floats; This high speed level sun wheel shaft other end passes through a jacking block axial location in the slow speed turbine stage power shaft; This slow speed turbine stage power shaft one end is fixed on the casing through roller bearing, and the other end stretches in second endoporus of slow speed turbine stage output shaft and with the slow speed turbine stage output shaft that is fixed on the casing has axial location through a jacking block;
Fixedly install level planet wheel spindle at a high speed between B, said high speed level planet carrier and the slow speed turbine stage power shaft; This high speed level planet wheel spindle external fixation is provided with level planetary gear at a high speed; Said high speed level sun wheel shaft and level planetary gear engagement at a high speed; Level planetary gear and the engagement of high speed level internal gear at a high speed simultaneously, this high speed level internal gear while and the high speed level gear coupling that is set on the slow speed turbine stage power shaft mesh;
C, said high speed level gear coupling are fixedly connected the speed adjusting gear large bevel gear simultaneously; This speed adjusting gear large bevel gear is meshed with the speed adjusting gear small bevel gear wheel shaft that is fixed on through roller bearing on the casing; The middle part of this speed adjusting gear small bevel gear wheel shaft is provided with the spline external tooth; This spline external tooth is meshed with the spline internal tooth of speed adjusting gear idler gear; This speed adjusting gear idler gear is connected with at least one hydraulic rotating function element through at least one speed adjusting gear side gear, and this speed adjusting gear cone pinion the tip of the axis is connected through the power shaft of the stand-by motor coupling stand-by motor outside with being installed in casing;
The end that D, said slow speed turbine stage output shaft are positioned at casing is provided with the slow speed turbine stage planetary gear through the slow speed turbine stage planet wheel spindle; This slow speed turbine stage planetary gear and the slow speed turbine stage sun gear engagement that is set in slow speed turbine stage power shaft one end; This slow speed turbine stage planetary gear and slow speed turbine stage internal gear engagement simultaneously; This slow speed turbine stage internal gear meshes with the slow speed turbine stage gear coupling simultaneously, and this slow speed turbine stage gear coupling is set in the slow speed turbine stage output shaft outside and is fixed on the casing simultaneously.
Said high speed level sun wheel shaft one end is realized axial location through block and high speed level power shaft, and the other end is realized axial location through jacking block and slow speed turbine stage power shaft.
Said hydraulic rotating function element is oil pump or hydraulic motor.
Said hydraulic rotating function element is fixed on the casing.
When the present invention installs and uses; Should the workpiece of large power overloading plant equipment be connected with the slow speed turbine stage output shaft of apparatus of the present invention; And hydraulic rotating function element (oil pump or hydraulic motor) outlet pressure signal outputed in the external control circuit of main motor, just can carry out work then.
Concrete operation principle of the present invention is set forth as follows:
(1) realization of soft start: during work, at first start the microrunning of small-power stand-by motor, through speed adjusting gear small bevel gear wheel shaft, speed adjusting gear large bevel gear, drive of level gear coupling and the high speed level planetary gear rotation of level internal gear engagement at a high speed at a high speed.In theory; Grade planetary gear engagement of level internal gear and high speed can drive slow speed turbine stage power shaft and high speed grade sun wheel shaft rotation at a high speed, and this moment, transmission device of the present invention became the differential gearing train of single an input (high speed grade internal gear input), dual output (slow speed turbine stage power shaft and high speed grade sun wheel shaft).But because the load that links to each other with the slow speed turbine stage power shaft through the slow speed turbine stage output shaft is very big; The input power of small-power stand-by motor can't drive the slow speed turbine stage power shaft and rotate; In fact the differential gearing train of this single input dual output becomes a slow speed turbine stage power shaft and fixes; Level internal gear input at a high speed, the fixed shaft gear train of level sun wheel shaft output at a high speed.Like this, the small-power stand-by motor is through level internal gear at a high speed, level planetary gear and level sun wheel shaft at a high speed at a high speed, drives the stall square inertia that high-power main rotor overcomes when starting through level power shaft at a high speed again and rotates.When the small-power stand-by motor accelerates to control during rotating speed gradually, main motor also thereupon zero load accelerate to rated speed.When main motor reaches rated speed; Automatically connect main motor power; Close the stand-by motor power supply, no longer main rotor is quickened, so the starting current of high-power main motor will be very little; Main motor starts under real idle condition, has also just accomplished the unloaded soft start of high-power main motor.
(2) realization of two-way stepless speed regulation: the power supply of small-power stand-by motor is cut off in main motor energized.Main motor remains in operation turning under the constant situation; The former road of power is returned; Drive at a high speed a level sun wheel shaft through level power shaft at a high speed and import, formed a kind of single input, the dynamic branch state of dual output as power: a part of power through the high speed level internal gear of differential gearing train to the speed adjusting gear large bevel gear; Hydraulic rotating function element (oil pump or the hydraulic motor) work that driving connects through speed adjusting gear small bevel gear wheel shaft, the auxiliary output of meaning; Part power is exported through the slow speed turbine stage output shaft through the slow speed turbine stage power shaft of differential gearing train, drives the large power overloading equipment workpiece, the main output of meaning.According to speed discrepancy balance shunting rule; Increase the outlet pressure of auxiliary output hydraulic rotating function element; The rotational resistance torque of speed adjusting gear small bevel gear wheel shaft is increased gradually; Then the rotating speed of auxiliary output will reduce gradually, and the power that is applied on the main workpiece of exporting will increase gradually, realize that workpiece is seamlessly transitted by zero speedup to rated speed.When workpiece reaches rated speed and need slow down later on; Reduce the outlet pressure of auxiliary output hydraulic rotating function element; The rotational resistance torque of speed adjusting gear small bevel gear wheel shaft is diminished; Then assist the rotating speed of output to increase gradually, the power that then is applied on the main workpiece of exporting will reduce, and realize that workpiece is seamlessly transitted to zero deceleration by rated speed.So just, realized main output by zero to rated speed and by rated speed to the zero two-way stepless speed regulation of acceleration, deceleration.
(3) realization of output overloading automatic protection functions: the allowable pressure of setting the hydraulic rotating function element according to the allowable load (output power torque) of equipment work mechanism; Former thereby when surpassing allowable value because of some when the external applied load of system, main output torque increases, the corresponding increase of auxiliary output torque; Hydraulic rotating function element outlet pressure is because of surpassing controlled pressure overflow allowable; Drive speed adjusting gear small bevel gear wheel shaft produces differential slippage rotation, and main output reduction of speed formula is stopped, and prevents the damage of main motor and machine driven system overload; After outer load problems of too solved, normal operation can recover again in system.
(4) realizations that drive the main motor current balances: the hydraulic rotating function element outlet pressure controlling value of the soft start stepless speed regulator of each drive point is set in the power torque that should bear according to each drive point of equipment more; When the load inequality occurring; The drive point power torque that bearing load is bigger increases; Make the corresponding increase of this drive point hydraulic rotating function element outlet pressure; When hydraulic rotating function element outlet pressure surpasses controlled pressure allowable,, make speed adjusting gear small bevel gear wheel shaft produce differential slippage rotation through hydraulic rotating function element earial drainage; Thereby make main output reduction of speed, receive certain load and till keeping balance automatically up to other underload drive point.
(5) realization of soft braking: when the needs soft stop; Need not to turn-off main motor power, according to the rule of main motor power, according to predetermined decompression rule to main output and auxiliary output steering; Gradually reduce the outlet pressure of auxiliary output hydraulic rotating function element; Increase its power output, make the rotating speed of slow speed turbine stage output shaft reduce to zero gradually, thereby realize the soft braking of plant equipment according to predetermined reduction of speed law curve.Identical with the operation principle of soft start, the braking time of soft braking also is adjustable.
(6) power saving function: if the present invention is applied to running environment and has certain haul distance gradient; And the high-power machinery equipment (like mine hoist and inclined shaft ribbon conveyer etc.) of frequent uplink and downlink; Under the condition that safety and reliability are protected; Can consider that the potential energy that utilizes himself and load deadweight to produce serves as descending operating mode power, energy savings.Be that descending operating mode does not start main motor (this moment, main motor was shut down braking); Weight utilization deadweight is transferred, and is equivalent to former main output and becomes the power reverse input, drives the working equipment rotation; Be equivalent to power reverse input low speed planetary differential train and high speed planet differential gear train; Through speed adjusting gear small bevel gear wheel shaft, drive the hydraulic rotating function element running of auxiliary output, the unique output loading of power for this reason of hydraulic rotating function element this moment again.Control hydraulic rotating function element outlet pressure is equivalent to increase load, i.e. the speed that may command weight deadweight is transferred makes that device security is controlled reliably transfers.
Compared with prior art, beneficial effect of the present invention is:
The present invention is melted into a whole soft start, stepless speed regulation, the square protection of output overloading limit and many power drive equilibrium function etc., is a kind of speed regulator of Multi Role Aircraft electrohydraulic integration; 2. adopt two-way controlled stepless speed regulation, large power overloading equipment can be operated on the speed of any setting; 3. realize the soft start of high-power main motor with the small-power stand-by motor; Not only can alleviate the startup impact that drive system itself receives significantly; Prolong the useful life of key components and parts; Simultaneously can also realize main empty load of motor starting current, to the impact of electrical network, reduce the equipment investment of power supply facilities when avoiding powerful device to start less than rated current; 4. apparatus of the present invention have realized the output overloading limiting protecting, have guaranteed safe operation.5. apparatus of the present invention can realize the main motor current balances that drive more, and the security of operation of uniting driving arrangement for the many motors of need provides safeguard.6. there is certain haul distance gradient in apparatus of the present invention as being applied to running environment, and on the high-power machinery equipment of frequent uplink and downlink, downward storke can need not power, transfer according to deadweight safety, save electric energy.7. apparatus of the present invention power source can be diversified, can not limited by power source, and except that electric power, other power sources can be realized the same function of machine.Method is to change the hydraulic valve of controlling the hydraulic oil pump outlet pressure into the mechanical type overflow valve to get final product.8. this speed regulator is also realized explosion prevention function easily if be disposed at the powerful device in down-hole and other explosive place.
Description of drawings
Fig. 1 is the forward cutaway view of a kind of concrete structure of the present invention.
Embodiment
Referring to Fig. 1; The present invention includes casing 16 and and be fixed on the high speed level power shaft 12 on the casing 16 through roller bearing; These high speed level power shaft 12 1 ends stretch out casing 16 and link to each other with the rotating shaft of main motor, and the other end offers first endoporus 10 and it is outside through the sheathed high speed level of roller bearing planet carrier 9.Be provided with the involute spline internal tooth in first endoporus 10 of this high speed level power shaft 12, the external tooth of this involute spline internal tooth and high speed level sun wheel shaft 13 connects and composes backlash and floats.Be somebody's turn to do high speed level sun wheel shaft 13 1 ends simultaneously and realize axial location through block 11 and high speed grade power shaft 12, the other end is through jacking block 18 and the slow speed turbine stage power shafts 20 realization axial location that are fixed on through roller bearing in the casing 16.These slow speed turbine stage power shaft 20 other ends stretch in second endoporus 34 of slow speed turbine stage output shaft 30 and with slow speed turbine stage output shaft 30 through a jacking block 31 in axial location.This slow speed turbine stage output shaft 30 is fixed on the opposite side of casing 16 through roller bearing, and these slow speed turbine stage output shaft 30 1 ends stretch out outside the casing 16.
Fixedly install level planet wheel spindle 15 at a high speed between this high speed level planet carrier 9 and the slow speed turbine stage power shaft 20, through roller bearing level planetary gear 14 at a high speed is set outside this high speed level planet wheel spindle 15.This is level sun wheel shaft 13 and grade planetary gear 14 engagements at a high speed at a high speed, level planetary gear 14 and level internal gear 8 engagements at a high speed at a high speed simultaneously, these 8 whiles of high speed level internal gear and high speed level gear coupling 17 engagements that are set on the slow speed turbine stage power shaft 20.
This high speed level gear coupling 17 is fixedly connected speed adjusting gear large bevel gear 19 simultaneously, and this speed adjusting gear large bevel gear 19 is meshed with the speed adjusting gear small bevel gear wheel shaft 35 that is fixed on through roller bearing on the casing 16.The middle part of this speed adjusting gear small bevel gear wheel shaft 35 is provided with the spline external tooth; This spline external tooth is meshed with the spline internal tooth of speed adjusting gear idler gear 4, and this speed adjusting gear idler gear 4 is through at least one speed adjusting gear side gear 5 be connected with at least one hydraulic rotating function element 2 (being two speed adjusting gear side gears 5 and two hydraulic rotating function element 2) in the present embodiment.This hydraulic rotating function element 2 can be oil pump or hydraulic motor.The end of this speed adjusting gear small bevel gear wheel shaft 35 is connected through the power shaft of stand-by motor coupling 36 with the stand-by motor 1 that is installed in casing 16 outsides.
The end that this slow speed turbine stage output shaft 30 is positioned at casing 16 fixedly installs slow speed turbine stage planetary gear 25 through slow speed turbine stage planet wheel spindle 26.The outside of this slow speed turbine stage power shaft 20 also is arranged with slow speed turbine stage sun gear 33; This slow speed turbine stage sun gear 33 and 25 engagements of slow speed turbine stage planetary gear; This slow speed turbine stage planetary gear 25 meshes with slow speed turbine stage internal gear 24 simultaneously; This slow speed turbine stage internal gear 24 meshes with slow speed turbine stage gear coupling 23 simultaneously, and this slow speed turbine stage gear coupling 23 also is set in slow speed turbine stage output shaft 30 outsides and is fixed on simultaneously on the casing 16.
Claims (5)
1. a mechanical-electrical liquid mixing soft start stepless speed regulator comprises the high speed level power shaft and the slow speed turbine stage output shaft that are fixed on the casing both sides through roller bearing, and this high speed level power shaft one end stretches out casing and links to each other with the rotating shaft of main motor, it is characterized in that:
A, the said high speed level power shaft other end offer first endoporus and it is outside through the sheathed high speed level of roller bearing planet carrier; Be provided with the involute spline internal tooth in this first endoporus; One end external tooth of this involute spline internal tooth and high speed level sun wheel shaft connects and composes backlash and floats; This high speed level sun wheel shaft other end passes through a jacking block axial location in the slow speed turbine stage power shaft; This slow speed turbine stage power shaft one end is fixed on the casing through roller bearing, and the other end stretches in second endoporus of slow speed turbine stage output shaft and with the slow speed turbine stage output shaft that is fixed on the casing has axial location through a jacking block;
Fixedly install level planet wheel spindle at a high speed between B, said high speed level planet carrier and the slow speed turbine stage power shaft; This high speed level planet wheel spindle external fixation is provided with level planetary gear at a high speed; Said high speed level sun wheel shaft and level planetary gear engagement at a high speed; Level planetary gear and the engagement of high speed level internal gear at a high speed simultaneously, this high speed level internal gear while and the high speed level gear coupling that is set on the slow speed turbine stage power shaft mesh;
C, said high speed level gear coupling are fixedly connected the speed adjusting gear large bevel gear simultaneously; This speed adjusting gear large bevel gear is meshed with the speed adjusting gear small bevel gear wheel shaft that is fixed on through roller bearing on the casing; The middle part of this speed adjusting gear small bevel gear wheel shaft is provided with the spline external tooth; This spline external tooth is meshed with the spline internal tooth of speed adjusting gear idler gear; This speed adjusting gear idler gear is connected with at least one hydraulic rotating function element through at least one speed adjusting gear side gear, and this speed adjusting gear cone pinion the tip of the axis is connected through the power shaft of the stand-by motor coupling stand-by motor outside with being installed in casing;
The end that D, said slow speed turbine stage output shaft are positioned at casing is provided with the slow speed turbine stage planetary gear through the slow speed turbine stage planet wheel spindle; This slow speed turbine stage planetary gear and the slow speed turbine stage sun gear engagement that is set in slow speed turbine stage power shaft one end; This slow speed turbine stage planetary gear and slow speed turbine stage internal gear engagement simultaneously; This slow speed turbine stage internal gear meshes with the slow speed turbine stage gear coupling simultaneously, and this slow speed turbine stage gear coupling is set in the slow speed turbine stage output shaft outside and is fixed on the casing simultaneously.
2. based on the described mechanical-electrical liquid mixing soft start stepless speed regulator of claim 1, it is characterized in that said high speed level sun wheel shaft one end is realized axial location through block and high speed level power shaft, the other end is realized axial location through jacking block and slow speed turbine stage power shaft.
3. mechanical-electrical liquid mixing soft start stepless speed regulator according to claim 1 is characterized in that, said hydraulic rotating function element is an oil pump.
4. mechanical-electrical liquid mixing soft start stepless speed regulator according to claim 1 is characterized in that, said hydraulic rotating function element is a hydraulic motor.
5. mechanical-electrical liquid mixing soft start stepless speed regulator according to claim 1 is characterized in that, said hydraulic rotating function element is fixed on the casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102050485A CN101694977B (en) | 2009-10-16 | 2009-10-16 | Mechanical-electrical liquid mixing soft start stepless speed regulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102050485A CN101694977B (en) | 2009-10-16 | 2009-10-16 | Mechanical-electrical liquid mixing soft start stepless speed regulator |
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| Publication Number | Publication Date |
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| CN101694977A CN101694977A (en) | 2010-04-14 |
| CN101694977B true CN101694977B (en) | 2012-07-18 |
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| CN2009102050485A Expired - Fee Related CN101694977B (en) | 2009-10-16 | 2009-10-16 | Mechanical-electrical liquid mixing soft start stepless speed regulator |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102332777B (en) * | 2011-07-20 | 2013-05-22 | 徐州科源液压有限公司 | Mining motor built-in traction machine |
| CN103115068B (en) * | 2013-01-31 | 2016-08-10 | 山东博特轴承有限公司 | Bearing used for mine hoist |
| CN108054872A (en) * | 2018-01-29 | 2018-05-18 | 南京迪瓦机械制造有限公司 | Permanent-magnet stepless variable-speed speed reducer |
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