CN102104356A - Brushless joint-control motor soft starter - Google Patents
Brushless joint-control motor soft starter Download PDFInfo
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- CN102104356A CN102104356A CN2011100290072A CN201110029007A CN102104356A CN 102104356 A CN102104356 A CN 102104356A CN 2011100290072 A CN2011100290072 A CN 2011100290072A CN 201110029007 A CN201110029007 A CN 201110029007A CN 102104356 A CN102104356 A CN 102104356A
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Abstract
The invention discloses a brushless joint-control motor soft starter used for a wound-type alternating-current asynchronous motor. Compared with the conventional brushless self-control soft starter, the brushless joint-control motor soft starter has the characteristics that: the joint sequence control of a water resistor, a shorting switch and a safety exhaust valve avoids a liquid spray phenomenon; 2, the water resistor adopts a graphite pole plate and is contacted before the shorting circuit, so that the electro erosion of the pole plate of the water resistor is reduced, the phenomenon of the fusion welding of a moving contact and a fixed contact of the shorting switch is avoided; 3, the on and off states of the shorting switch are controlled by two units respectively, so that the jumping phenomenon of the moving contact and the fixed contact is avoided, and the contact pressure of the contacts is improved; 4, the contact time of the shorting circuit and the water resistor can be conveniently regulated after leaving a factory, so that the adaptability is improved; 5, a safety valve and an exhaust valve are integrated and are linked with the shorting switch, so that the number of seal surfaces is reduced and the starter is convenient to maintain; and 6, according to different users, different implementation modes can be adopted, and the manufacturing cost is reduced.
Description
Technical field
The present invention relates to a kind of Wound-rotor type AC asynchronous motor starter, more specifically say so and adopt water resistance to realize the device that the brushless joint control of Wound-rotor type AC asynchronous motor starts.
Technical background
Invention disclosed patent " the Brushless Automatic Control Motor Soft Actuator " (patent No.: ZL03112809.2) water resistance is installed on the machine shaft, utilize the size of the centrifugal force controlled water resistance that motor when rotation produce, realized the brushless automatic control soft start of Wound-rotor type AC asynchronous motor.But: 1., because of water resistance sound pole plate and contact are installed in the electrolyte, and be metal, can't solve the galvano-cautery problem of pole plate, cause electric motor starting to finish after, starting resistance can't really reduce to zero, thereby causes the starter heating, wastes energy; 2., all independently control of water resistance, safety valve, vent valve, the control of water resistance, vent valve all is arranged in the water resistance case, once dispatching from the factory, can't adjust; 3., when motor load changes, can not quicken the speed that water resistance reduces automatically, hydrojet can be occurred, the generation of electric motor starting failure phenomenon can't be avoided; 4., because of the safety exhaust aperture little, the gas that produces in the time of can't in time discharging electrical fault, the phenomenon of can blasting; 5., binding post connects with pole plate is soft, during the wiring of mounting or dismounting motor, the easy connecting shaft rotation of binding post causes the binding post sealing surface to destroy, and the phenomenon of leakage occurs.
Disclosed utility model patent " brushless automatic control electric machine the soft starter " (patent No.: though ZL200820175688.7) solved the starter (patent No.: ZL03112809.2) blast, perishable, the binding post location of pole plate and technical barriers such as annealed copper wire and shell discharge, and the pole plate that discloses dual mode moves contact device.But: 1., pole plate moves the contact device complex structure, sound pole plate contact rotating speed inconvenient debugging, and can't be after starter dispatches from the factory is adjusted pole plate short circuit opportunity; 2., adopt graphite pole plate electrochemically resistant to learn strong, the anti-melting welding of corrosive power although, contact resistance is big, and starter operation back heating is serious, wastes energy; 3., the exhaust structure complexity, and the seal multidimensional repaiies difficulty, when inner member damages (damage of example exhaust valve lever), can cause the global failure of vent valve.
Disclosed utility model patent " brushless automatic control electric machine liquid resistance the soft initiator " (patent No.: ZL200920091386.6), the centrifugal force that utilizes motor to rotate is directly controlled the Kai Heguan of shorting switch, avoided switch contact to be installed in galvano-cautery in the electrolyte, but: 1., its starting resistance fixes, can not reduce automatically according to motor speed; And rotor voltage and motor speed are to reduce in direct ratioly, cause electric motor starting electric current and torque to reduce with motor speed with being directly proportional; When detent torque during, just caused the failure of electric motor starting less than load torque; 2., shorting switch is only by centrifugal force controlled, and is disposable short circuit, short circuit speed is little, and contact melting welding easily takes place; 3., when motor load changes, because of the fluctuation of motor speed causes the jump of shorting switch contact, the useful life of further having reduced starter; 4., vent valve is fixedly mounted on the outer toroid of starter, when motor starts at every turn, all the electrolyte in the catheter can be discharged, and cause the loss of electrolyte; 5., because of catheter aperture little (the pipe conference is when causing each startups, and the liquid of discharge is too much), as the electric motor starting failure, the gas of the resistance of discharge water in time generation has the danger of blast.
1., do not have a kind of starter can be according to the variation of motor load comprehensive above-mentioned starting drive can sum up:, quicken the speed that water resistance reduces automatically, increase the starting current and the torque of motor, avoid the generation of electric motor starting failure phenomenon.2., do not have a kind of starter to have variable water resistance and two kinds of devices of shorting switch simultaneously, promptly can not possess higher startability and lower running wastage dual-use function simultaneously; 3., the contact of switch contact or water resistance pole plate is one step completed, can't solve contact resistance little with contact melting welding this to contradiction; 4., the control of shorting switch or water resistance pole plate is single, the closing and divide and can not control respectively of switch or pole plate, cause when reducing electric motor starting impulse current and the jump of avoiding switch contact this can't solve contradiction; 5., shorting switch or adjust on water resistance contact opportunity inconveniently, or corresponding adjusting device is not set, starter adapts to different motor load ability; 6., vent valve, safety valve be provided with respectively, or unite and be arranged on the water resistance container outside cylinder, complex structure, sealing surface is many, install adjust inconvenient; Or starter motor all will discharge electrolyte at every turn, and the danger of blast is arranged.
Summary of the invention
Main purpose of the present invention is: overcome the said apparatus deficiency, invent a kind of variation of automatic adaptation load, avoid starting the generation of failure phenomenon; Safe and reliable, long service life, maintenance and parameter adjustment be the brushless joint control starting drive of coiling electric motor easily.
For realizing goal of the invention, the technical solution used in the present invention is:
A kind of brushless joint control motor soft starter includes circular ring type water resistance container, water resistance R, binding post A, piston S, shorting switch K, safety exhaust F; Water resistance container fixed cover is located on the machine shaft; Water resistance R includes static plate electrode, electrolyte, movable plate electrode and pole plate dish, and is installed in the water resistance container inside, and static plate electrode connects with binding post A is electric, and movable plate electrode connects with the pole plate dish is electric; Water resistance R, shorting switch K, rotor outlet and the electric parallel connection of binding post A; Shorting switch R includes moving contact and fixed contact, is installed in the water resistance outside of containers, and moving contact separates formation rotor outlet and water resistance R connected in electrical series with fixed contact; Moving contact contacts with fixed contact and constitutes the rotor outlet by shorting switch K electric short circuit; Piston rod one end among the piston S connects with water resistance R pole plate dish, the size of control water resistance; The other end connects with lever through a gap, and the lever other end connects with lock guide post among the shorting switch K, also comprises guide post and lock guide post in the described shorting switch K; Lock guide post in the shorting switch K connects with guide post is vertical, the opportunity of control shorting switch K adhesive; The setting up of gap between piston rod and lever, can guarantee the contact of water resistance pole plate after, shorting switch K contacts again, and has avoided lock guide post stroke long; Shorting switch K guide post connects with safety exhaust F guide post by chain wheel rope, the unlatching of control safety exhaust F.When the required control stroke of water resistance R more in short-term, piston S can be with bellows or diaphragm equivalent substitution, to reduce production costs.
A kind of brushless joint control motor soft starter includes circular ring type water resistance container, water resistance R, binding post A, shorting switch K, safety exhaust F; Water resistance container fixed cover is located on the machine shaft; Water resistance R includes static plate electrode, electrolyte, movable plate electrode and pole plate dish, and is installed in the water resistance container inside, and static plate electrode connects with binding post A is electric, and movable plate electrode connects with the pole plate dish is electric; Water resistance R, shorting switch K, rotor outlet and the electric parallel connection of binding post A; Shorting switch K includes moving contact and fixed contact, is installed in the water resistance outside of containers, and moving contact separates formation rotor outlet and water resistance connected in electrical series with fixed contact; Moving contact contacts with fixed contact and constitutes the rotor outlet by shorting switch K electric short circuit; Also comprise piston S and block, piston rod one end among the piston S connects with water resistance pole plate dish, the size of control water resistance, the other end connects with moving contact in the shorting switch through a gap, drive moving contact and move to fixed contact, the setting up of gap between piston rod and moving contact, can guarantee the adhesive of water resistance pole plate after, shorting switch K adhesive again, and avoided the moving contact stroke long; The pole plate dish is provided with block, and block connects with the safety exhaust guide post through a gap, the unlatching of control safety exhaust, and setting up of gap can guarantee that safety exhaust F opens when the fast adhesive of water resistance pole plate.When the required control stroke of water resistance more in short-term, piston can be with bellows or diaphragm equivalent substitution, to reduce production costs.
A kind of brushless joint control motor soft starter includes circular ring type water resistance container, water resistance R, binding post A, shorting switch K, safety exhaust F; Water resistance container fixed cover is located on the machine shaft; Water resistance R includes pole plate, electrolyte, and is installed in the water resistance container inside, pole plate be fixedly mounted on the electrically connected insulated column of binding post on; Water resistance R, shorting switch K, rotor outlet and the electric parallel connection of binding post A; Shorting switch K includes moving contact and fixed contact, is installed in the water resistance outside of containers, and moving contact separates formation rotor outlet and water resistance connected in electrical series with fixed contact; Moving contact contacts with fixed contact and constitutes the rotor outlet by shorting switch K electric short circuit; Be provided with the lock guide post in the shorting switch K and connect, adjust the pressure of lock guide post stage clip, can adjust the opportunity of shorting switch adhesive with guide post is vertical; Guide post connects with safety exhaust F guide post by chain wheel rope, the unlatching of control safety exhaust F.
Described water resistance R also comprises control water resistance size, and the piston rod that connects with the pole plate dish; The nut that also is provided with the overtravel spring between water resistance pole plate dish and the piston rod and makes things convenient for stroke to adjust, after the contact of assurance sound pole plate, guide post also has one section overtravel, the adhesive of control shorting switch; The sound pole plate all can use graphite cake, has reduced electrochemical corrosion, has improved anti-melting welding ability; Movable plate electrode is fixedly mounted on the pole plate dish, static plate electrode be fixedly mounted on the electrically connected insulation column of binding post on.
Described piston S includes pressure regulation device, stage clip, and the piston of sealing and induction pressure also comprises piston rod, piston cap; Stage clip, piston convert the pressure in the water resistance container to the displacement of piston rod; Pressure regulation device and piston cylinder adopt the thread connection that makes things convenient for pressure to adjust, and piston cap and piston cylinder adopt the thread connection that makes things convenient for piston cylinder processing and install; Between outside piston is installed in the water resistance container, and near water resistance container outside cylinder one side.When the required control stroke of water resistance more in short-term, piston and piston cylinder can be with bellows or diaphragm equivalent substitutions.
Described shorting switch K has also comprised the inertial mass that the driving moving contact moves to fixed contact, and the control moving contact moves the lock guide post on opportunity to fixed contact, also comprises guide post, stage clip, lock stage clip, bearing; Moving contact and inertial mass are fixedly mounted on the guide post, and inertial mass drives moving contact by centrifugal force and moves to fixed contact; Guide post is provided with the groove that stops moving contact to move to fixed contact, and the control moving contact is to opportunity that fixed contact moves; A side of its groove is the inclined-plane that is provided with inclined angle alpha; During inclined angle alpha＞angle of friction β, be applicable to joint control (as embodiment one), during inclined angle alpha＜angle of friction β, be applicable to automatic control (as embodiment three); Lock guide post, lock stage clip connect by bearing and guide post are vertical, and motor is when inactive state, and an end of lock guide post is inserted in the groove, and the prevention moving contact moves to fixed contact.
Described safety exhaust F comprises the spool that seals, the stage clip of a safety effect, the guide post that the driving spool moves, and also comprises stage clip fixed head, stage clip standing screw; Spool is fixed on the guide post, and the stage clip fixed head is fixed on stage clip and spool on the valve seat by the stage clip standing screw, and makes safety exhaust be in close valve state; By the distance of stage clip standing screw adjustment stage clip fixed head and valve base chamber, can adjust the safety valve operating pressure; The safety exhaust seat can directly be processed by the water resistance shell of tank, and safety exhaust can be opened by the displacement of pressure inside or guide post.
Electric current when water resistance R is used to reduce electric motor starting, the torque when improving electric motor starting; Above-mentioned variable water resistance R, the reason piston rod drives, when motor load increases the weight of, the steam that water resistance R produces can increase the pressure in the water resistance case, and piston rod moves, and quickens the minimizing of water resistance R resistance value, improve the starting current and the torque of motor, avoid the generation of electric motor starting failure; Adopt graphite cake as pole plate, reduced the electrochemical corrosion of pole plate, avoided the melting welding of pole plate to take place.
After shorting switch K is used for the electric motor starting end, short circuit water resistance R, the loss when reducing machine operation.The shorting switch K of above-mentioned starting drive controls shorting switch K " pass " and " opening " respectively by inertial mass and lock guide post, has avoided the fluctuation of motor speed to cause the generation of shorting switch K dynamic/static contact chattering; Shorting switch K dynamic/static contact has been avoided the generation of melting welding in water resistance sound pole plate contact back contact.
Safety exhaust F prevents electrolyte leakage on the one hand, the gas that produces when being used on the other hand in time discharging electric motor starting.The safety exhaust F of above-mentioned starting drive will according to the pressure exhaust in the water resistance container with lump together according to the exhaust banks of motor speed, and utilize water resistance shell of tank processing delivery valve seat, main seal member is installed in outside the water resistance container, simplified the structure of safety exhaust F, reduce sealing surface, made things convenient for operation maintenance.
Description of drawings:
Fig. 1 is the theory structure schematic diagram of the embodiment of the invention one;
Fig. 2 is the theory structure schematic diagram of the embodiment of the invention two;
Fig. 3 is the embodiment of the invention one structural representation;
Fig. 4 is the embodiment of the invention two structural representations;
Fig. 5 is the embodiment of the invention three structural representations;
Fig. 6 divides state master TV structure schematic diagram for two control shorting switchs;
Fig. 7 divides state to found the TV structure schematic diagram for two control shorting switchs;
Fig. 8 is the euphroe structural representation
Fig. 9 closes state master TV structure schematic diagram for two control shorting switchs;
Figure 10 closes the upright TV structure schematic diagram of state for two control shorting switchs;
Embodiment:
Embodiment one: as Fig. 1, shown in Figure 3, brushless joint control motor soft starter has increased piston, lever, pulley on the basis of existing starter, have variable water resistance, the shorting switch of the outer two controls of water resistance case, three kinds of devices of safety exhaust of combination simultaneously.Piston rod 13 1 ends in the piston connect with water resistance pole plate dish 22, the rotating speed when being used for according to electric motor starting, and the resistance when adjusting electric motor starting reaches the fluctuation purpose that reduces the electric motor starting electric current.The variable water resistance of piston control, when motor load is heavier, the steam pressure that water resistance produces can quicken the speed that the water resistance resistance reduces, thereby avoids the detent torque that a lower valley point current has increased motor occurring, has avoided the generation of electric motor starting failure phenomenon.Because of the sound pole plate adopts graphite cake, compare with metal polar plate, reduce galvano-cautery, avoided the generation of melting welding.Piston rod 13 other ends connect with lever 34 by a gap, and lever 34 connects with lock guide post 31 in the shorting switch.When electric motor starting finishes, short circuit starting resistance, the power loss when reducing the motor operation.By adjusting the gap of 34 on piston rod 13 and lever, can guarantee shorting switch hysteresis water resistance pole plate contact back short circuit, avoid the generation of switch contact melting welding.Returning by stage clip 2 and inertial mass 5 decisions of shorting switch suitably adjusted relevant parameter, and rotating speed of motor lower (as 50% motor rated speed) when the shorting switch contact is separated has been avoided the generation of the chattering of switch.Shorting switch guide post 1 connects with safety exhaust guide post 6 by chain wheel rope 29, and after electric motor starting finished, the gas that produces when in time discharging electric motor starting was avoided gas gathering in the water resistance case, creates conditions for starter starts next time.Because of safety exhaust is opened after shorting switch action, and shorting switch is the adhesive by the centrifugal force driving switch of inertial mass 5, the opening of safety exhaust, and the reduction of water resistance case internal pressure even piston rod 13 returns, also can not cause the separation of shorting switch; Shorting switch is installed in water resistance container 9 outsides, avoids the generation of water resistance galvano-cautery phenomenon; Shorting switch, lever, pulley etc. are installed in water resistance container 9 outsides, have made things convenient for the maintenance and the operation maintenance of relevant apparatus.Between outside safety exhaust, piston are installed in the water resistance container 9, made things convenient for the adjustment of relevant parameter, improved the adaptive capacity of starter different motor loads.When the required control stroke of water resistance more in short-term, piston can be with bellows or diaphragm equivalent substitution.
As shown in Figure 3, Figure 4, in the brushless joint control motor soft starter by piston control, variable water resistance, it can adapt to unequally loaded automatically and changes, and avoids the generation of electric motor starting failure.It is made of movable plate electrode 19, static plate electrode 16, electrolyte, pole plate dish 22, piston rod 13 etc.Movable plate electrode 19 is fixedly mounted on the pole plate dish 22, and pole plate dish 22 is driven by piston rod 13, changes the distance between the sound pole plate, control water resistance size.Movable plate electrode 19, static plate electrode 16 adopt graphite cake, have not only reduced the generation of galvano-cautery, the generation of melting welding when having avoided the contact of sound pole plate simultaneously.Be provided with overtravel spring 20 between pole plate dish 22 and the piston rod 13, after can guaranteeing the contact of sound pole plate, piston rod can also continue to move forward, make the outer shorting switch dynamic/static contact hysteresis sound pole plate contact of water resistance, avoided the generation of shorting switch dynamic/static contact melting welding, the useful life of having improved shorting switch.Simultaneously, because of the shorting switch dynamic/static contact is contact again after water resistance sound pole plate contact, its dynamic/static contact need not to adopt the alloy contact of the high resistivity of anti-melting welding, just can avoid the generation of melting welding, has reduced shorting switch dynamic/static contact contact resistance and cost.
As shown in Figure 3, Figure 4, the piston in the described brushless joint control motor soft starter is made of pressure regulation device 11, stage clip 12, piston rod 13, piston 14 and piston cap 15 etc.Stage clip 12, piston 14 convert the pressure in the water resistance container 9 to the displacement of piston rod 13.Pressure regulation device 11 adopts thread connection with piston cylinder, and can adjust outside starter water resistance case, has improved the adaptability of starter to motor load.Piston cap 15 adopts thread connection with piston cylinder, has made things convenient for the processing and the assembling of piston cylinder.Pressure regulation device 11, piston cap 15 and be equipped with piston rod 13 guiders and the gas through hole of coming in and going out for liquid.Be the centrifugal force that reflects that more accurately water resistance produces because of the motor rotation, piston is installed in the outside cylinder side of starter circular ring type water resistance container inner face.When electric motor starting, the motor rotation makes water resistance produce centrifugal force, and produces certain pressure, and the control piston bar moves.The displacement of piston rod can change with motor speed with being directly proportional, is used to control the size of water resistance and the opportunity of shorting switch adhesive, finishes the start-up course of motor.Adjust the position of pressure regulation device 11 or the rigidity of replacing stage clip 12, can conveniently adjust the opportunity of water resistance sound pole plate and shorting switch dynamic/static contact contact.When motor load was heavier, the speed that the steam pressure meeting accelerating piston bar that water resistance produces moves made speeding up of water resistance resistance minimizing, avoids the generation of electric motor starting failure phenomenon.Control stroke more in short-term when water resistance, piston (14) and piston cylinder can be with bellows or diaphragm equivalent substitution, to reduce production costs.
As Fig. 1, Fig. 3, Fig. 5, Fig. 6, Fig. 7, Fig. 9, shown in Figure 10, shorting switch in the described brushless joint control motor soft starter is two controls, and it is adjusted screw 28, bearing 27 etc. by moving contact 4, fixed contact 3, guide post 1, stage clip 2, inertial mass 5, lock guide post 31, lock stage clip 32, lock stage clip and constitutes.Moving contact 4 is fixedly mounted on the guide post 1, and guide post 1 is provided with the groove that stops guide post to move.Shorting switch guide post 1 groove one side is provided with the inclined-plane of inclined angle alpha, and inclined angle alpha is used to jointly control (as embodiment 1) during greater than angle of friction β, during less than angle of friction β, is used for automatic control (as embodiment 3).Lock guide post 31, lock stage clip 32 are by bearing 27 and 1 vertical connection of guide post; Lock guide post 31 connects by lever 34 with piston rod 13; Guide post 1 connects with safety exhaust by rope 29.When motor was static, moving contact 3 left stationary electrode under the effect of stage clip 2.During electric motor starting, under inertial mass 5 action of centrifugal force, make moving contact 4 produce the trend that moves to fixed contact 3, but under the effect of lock guide post 31, still be in disconnected position; Have only when piston rod 13 to make shorting switch lock guide post 31 leave the groove of guide post 1, just can make moving contact 4, realize the quick short circuit of dynamic/static contact to fixed contact 3 fast moving by lever 34; Simultaneously, the disconnection of moving contact 4 is by inertial mass 5 and stage clip 2 decisions, when the motor speed setting of moving contact being left fixed contact is low (as 50%), motor pressure between dynamic/static contact when work can be improved on the one hand, chattering generation can be avoided on the other hand because of the fluctuation generation of motor speed.Adjust the quality of inertial mass 5 or the rigidity of stage clip 2, in the time of can conveniently adjusting the dynamic/static contact separation, rotating speed of motor.Suitably adjust the distance of 34 on piston rod 13 and lever, after can guaranteeing the contact of water resistance sound pole plate, the shorting switch dynamic/static contact contacts again, make pole plate and contact realize contacting in proper order, to make full use of the good resistance fusion welding energy of graphite cake, reduce shorting switch contact resistance and manufacturing cost, improve contact useful life.The dynamic/static contact of two control shorting switchs can be two contacts, also can be single contact.When adopting two contact, need not on the moving contact to carry out soft the connection, and need not insulation against ground with binding post or starter shell.When adopting single contact, need on the moving contact to carry out soft the connection with binding post or starter shell; Connect with binding post as moving contact, moving contact and driving control device also need insulation against ground; But single contact need not by two contacts because of electric current, and contact resistance is little and saved one times switch contact manufacturing cost, on the bigger motor of the capacity that is applicable to.
As Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, the safety exhaust in the described brushless joint control motor soft starter makes up, and it is by guide post 6, stage clip 7, stage clip fixed head 46, stage clip standing screw 47, spool 8, pulley 29 and restrict and 30 etc. constitute; Spool 8 is fixed on the guide post 6, and stage clip fixed head 46 is fixed on stage clip 7 on the water resistance shell of tank by stage clip standing screw 47, under the effect of stage clip 7, makes valve closing, avoids the loss of water resistance; When the shorting switch adhesive, bar 1 30 moves up spool 8 by restricting, and opens safety exhaust; When the pressure in the water resistance container was higher than the pressure of stage clip 7, safety exhaust also can be opened automatically, realized the combination of centrifugal force exhaust and the exhaust of water resistance case internal pressure control.Adjust the distance of stage clip fixed head 46 and water resistance container by stage clip standing screw 47, or change stage clip 7, can conveniently adjust the operating pressure of safety exhaust.Delivery valve seat can directly be processed by water resistance case shell, avoids delivery valve seat that the seal phenomenon of leakage of formation independently is set.Because of the major control part of valve is installed in outside the water resistance case, made things convenient for maintenance.
As shown in Figure 8, an euphroe that is made of dish 40, spring 41 adjustment screws 42 can be set in shorting switch guide post 1, certain force of strain be arranged all the time to guarantee rope 29.When normally starting because of starter, the gas flow that is produced is very little, and the required stroke of exhaust plug is short, and pulley can be with fixedly chute replacement, to reduce manufacturing cost and to improve reliability.When safety exhaust is opened because of the control of internal pressure or shorting switch, as long as shorting switch moves, because of the separation of shorting switch by inertial mass 5 according to the motor speed decision, can not return because of the reduction of water resistance pressure.Safety exhaust is arranged on the interior cylindrical side of annular water resistance container 9 end faces, and behind the electric motor starting, under action of centrifugal force, water resistance can be automatically away from annular water resistance container 9 inner cylinder faces.Therefore, when motor normally starts, the unlatching of safety exhaust, the gas of a meeting discharge water resistance container 9, and can discharge water resistance.
As shown in Figure 3, for making things convenient for the inner fallible component maintenance of starter, circular ring type water resistance container 9 is arranged to the removable head type.For guaranteeing the location of piston rod, piston 14 is processed into the indent cylinder type; Piston pressure adjusting device 11 is provided with the piston rod guide cylinder; Piston cap 15 adopts thread connection with piston cylinder, can make things convenient for the processing of piston cylinder.Piston cap 15, piston pressure adjusting device 11 are equipped with the aperture that makes things convenient for liquids and gases to flow.Binding post 10, piston, shorting switch, sound pole plate become corresponding shape setting, wherein shorting switch and piston are arranged on two binding posts, the 10 center bisectors, two fixed contacts of shorting switch connect firmly with adjacent binding post 10 respectively, inner water resistance static plate electrode adopts with binding post 10 and connects firmly, and it is fixing dead with binding post, when avoiding installing and removing with lead that motor connects, the rotation of binding post connecting shaft destroys the sealing of binding post 10.Shorting switch is controlled the opportunity of its short circuits by lever 34 by piston rod 13.Binding post, shorting switch, water resistance can be arranged to three or six according to capacity motor or rotor number of outgoing, and be symmetrically distributed at the cylinder end face.Safety exhaust can be arranged to three or two, to guarantee dynamic balancing; That is to say that be arranged to six when shorting switch, safety exhaust only need be arranged to two, only need two shorting switchs to connect by rope with safety exhaust.
As shown in Figure 3, Figure 4, be provided with blade 39 on pole plate dish back shroud, the pole plate dish is provided with the through hole of water supply resistance circulation, with the circulation of the water resistance between water resistance and the whole starter between acceleration sound pole plate.Also can establish grade fan housing 38, be fixedly mounted on the water resistance case end face of binding post side, to reduce the windage of shorting switch, binding post and safety exhaust, saves energy.
Embodiment 2: as Fig. 2, shown in Figure 4, and described brushless joint control motor soft starter, it is a kind of omission type execution mode of embodiment 1, its primary structure and specific embodiment one are basic identical.It has three kinds of devices of safety exhaust of variable water resistance, shorting switch and combination simultaneously, but shorting switch is single control.Piston rod 13 1 ends in the piston connect with water resistance pole plate dish 22, the rotating speed when being used for according to electric motor starting, the resistance when adjusting electric motor starting.Because of the sound pole plate adopts graphite cake, reduced the generation of galvano-cautery and melting welding.Piston rod 13 other ends connect with shorting switch moving contact 4; And fixed contact 3 is fixed on the moving contact 4 by stage clip 2 and guide post 1.When electric motor starting finished, piston rod 13 directly drove moving contact 4 and contacts with fixed contact 3, short circuit starting resistance, the power loss when reducing the motor operation.Pole plate dish 22 is provided with block 48, when electric motor starting finishes, and top safety exhaust guide post 6, the gas that produces when in time discharging electric motor starting.Shorting switch is installed in water resistance container 9 outsides, avoids the generation of water resistance galvano-cautery phenomenon, and has made things convenient for maintenance.Between outside piston and safety exhaust are installed in the water resistance container 9, made things convenient for the adjustment of relevant parameter, improved motor starter the unequally loaded adaptive capacity.Although this scheme does not possess the function that prevents that the switch contact chattering from taking place, but because of the contact of switch contact hysteresis water resistance pole plate, and prior to separating, the spark that has produced when having avoided the contact of ordinary tap contact and having separated, therefore, this scheme can be used for being used to reduce the starter manufacturing cost on the little blower fan water pump motor of motor load fluctuation.When the required control stroke of water resistance more in short-term, piston can be with bellows or diaphragm equivalent substitution, to reduce manufacturing cost and to improve reliability.
Embodiment 3: as shown in Figure 5, described brushless joint control motor soft starter, it is the another kind omission type execution mode of embodiment 1.It has increased pulley mechanism on the basis of existing starter.Water resistance is fixed, and fixed water resistance adopts pole plate 24 to be fixedly mounted in the water resistance container and gets final product.When water resistance adopts when fixed, because of need not the size of piston rod 13 control water resistances, piston only need be controlled shorting switch, and required stroke is short, also need not to use with water resistance to jointly control, and piston and lever can omit.At this moment, shorting switch guide post 1 groove inclined angle alpha is less than angle of friction β, and when the centrifugal force that produces when inertial mass 5 had overcome component that lock guide post 31 produces and friction on guide post 1, it is mobile to fixed contact (3) that guide post 1 just drives moving contact (4).Lock the pressure of the spring 32 of guide post 31 by adjusting shorting switch, or shorting switch guide post 1 groove inclined angle alpha, the rotating speed of may command shorting switch adhesive.Fixedly the centrifugal switch of water resistance formula because of contact is not to contact for the second time, needs to adopt the alloy contact of anti-melting welding.Starting resistance can not reduce automatically according to the pressure in motor speed or the water resistance case, and the starting current fluctuation is big, and the variation that can not adapt to load automatically avoids starting the generation of failure phenomenon.But compared with prior art, still have generation that prevents shorting switch contact chattering and advantage such as safety exhaust is simple in structure, easy to adjust, sealing surface is few.It is bigger that fixed water resistance starter can be used for power supply capacity, and on the motor of No Load Start, as the rolling mill motor of No Load Start, to reduce the starter manufacturing cost.
Claims (7)
1. a brushless joint control motor soft starter includes circular ring type water resistance container (9), water resistance R, binding post A, shorting switch K, safety exhaust F; Water resistance container (9) fixed cover is located on the machine shaft; Described water resistance R includes static plate electrode, electrolyte, movable plate electrode and pole plate dish (22), and is installed in the water resistance container inside; Static plate electrode connects with binding post A is electric, and movable plate electrode connects with the pole plate dish is electric; Water resistance R, shorting switch K, rotor outlet and the electric parallel connection of binding post A; Described shorting switch K includes moving contact (4) and fixed contact (3), and is installed in the water resistance outside of containers; Moving contact (4) separates formation rotor outlet and water resistance connected in electrical series with fixed contact (3); Moving contact (4) contacts with fixed contact (3) and constitutes the rotor outlet by shorting switch K electric short circuit; Described safety exhaust F comprises spool (8), guide post (6), is installed on the water resistance container; It is characterized in that: also comprise piston S, lever and pulley; Piston rod (13) one ends in the piston connect with water resistance pole plate dish (22), and the other end bumps with lever (34) after through a gap and connects, and lever (34) other end connects with lock guide post (31) in the shorting switch K; Described shorting switch K also comprises guide post (1) and lock guide post (31); Lock guide post (31) and vertical connection of guide post (1) in the shorting switch K; Shorting switch K guide post (1) connects with safety exhaust guide post (6) by chain wheel rope (29).
2. a brushless joint control motor soft starter includes circular ring type water resistance container (9), water resistance R, binding post A, shorting switch K, safety exhaust F; Water resistance container (9) fixed cover is located on the machine shaft; Described water resistance R includes static plate electrode, electrolyte, movable plate electrode and pole plate dish (22), and is installed in the water resistance container inside, and static plate electrode connects with binding post is electric, and movable plate electrode connects with the pole plate dish is electric; Water resistance R, shorting switch K, rotor outlet and the electric parallel connection of binding post A; Described shorting switch K includes moving contact (4) and fixed contact (3), and is installed in the water resistance outside of containers, and moving contact (4) separates formation rotor outlet and water resistance connected in electrical series with fixed contact (3); Moving contact (4) contacts with fixed contact (3) and constitutes the rotor outlet by shorting switch K electric short circuit; Described safety exhaust F comprises spool (8), guide post (6), is installed on the water resistance container; It is characterized in that: also comprise piston S and block; Piston rod (13) one ends in the piston connect with water resistance R pole plate dish (22), the other end through a gap after with shorting switch K in moving contact (4) bump and connect, drive moving contact (4) and move to fixed contact (3); Pole plate dish (22) is provided with block (48), and block (48) bumps through a gap and safety exhaust F guide post (6) and connects.
3. a brushless joint control motor soft starter includes circular ring type water resistance container (9), water resistance R, binding post A, shorting switch K, safety exhaust S; Water resistance container (9) fixed cover is located on the machine shaft; Described water resistance R includes pole plate (24), electrolyte, and is installed in the water resistance container inside, pole plate (24) be fixedly mounted on the electrically connected insulated column of binding post A on; Water resistance R, shorting switch K, rotor outlet and the electric parallel connection of binding post A; Described shorting switch K includes moving contact (4) and fixed contact (3), and is installed in the water resistance outside of containers, and moving contact (4) separates formation rotor outlet and water resistance connected in electrical series with fixed contact (3); Moving contact (4) contacts with fixed contact (3) and constitutes the rotor outlet by shorting switch K electric short circuit; Described safety exhaust F comprises spool (8), guide post (6), is installed on the water resistance container; It is characterized in that: also comprise pulley; Described shorting switch K also comprises guide post (1) and lock guide post (31); Shorting switch K internal lock guide post (31) and vertical connection of guide post (1); Guide post (1) connects with safety exhaust F guide post (6) by chain wheel rope (29).
4. brushless joint control motor soft starter according to claim 1 and 2 is characterized in that: also be provided with overtravel spring (20) between described water resistance R pole plate dish (22) and the piston rod (13) and make things convenient for stroke to adjust nut (18) and nut (21); The sound pole plate all can use graphite cake, and movable plate electrode is fixedly mounted on the pole plate dish (22), static plate electrode be fixedly mounted on the electrically connected insulation column of binding post on.
5. brushless joint control motor soft starter according to claim 1 and 2 is characterized in that: described piston S includes pressure regulation device (11), stage clip (12), piston (14), piston rod (13); Stage clip (12), piston (14) convert the pressure in the water resistance container (9) to the displacement of piston rod (13); Pressure regulation device (11) adopts the thread connection that makes things convenient for pressure to adjust with piston cylinder; Between outside piston is installed in the water resistance container (9), and near water resistance container (9) outside cylinder one side.
6. according to claim 1 or 3 described brushless joint control motor soft starters, it is characterized in that: described shorting switch K also comprises inertial mass (5), stage clip (2), lock stage clip (32), lock stage clip adjustment lid (28), bearing (27); Moving contact (4) and inertial mass (5) are fixedly mounted on the guide post (1), and guide post (1) is provided with the groove that stops moving contact (4) to move to fixed contact (3); A side of its groove is the inclined-plane that is provided with inclined angle alpha; Lock stage clip adjustment lid (28) will be locked guide post (31), lock stage clip (32) is fixed on guide post (1) vertical plane by bearing (27).
7. according to claim 1 or 2 or 3 described brushless joint control motor soft starters, it is characterized in that: described safety exhaust F also comprises stage clip (7), stage clip fixed head (46), stage clip standing screw (47); Spool (8) is fixed on the guide post (6), and stage clip fixed head (46) is fixed on stage clip (7) and spool (8) on the valve seat by stage clip standing screw (47), and makes safety exhaust F be in close valve state; The safety exhaust seat can directly process on the water resistance shell of tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100290072A CN102104356A (en) | 2011-01-18 | 2011-01-18 | Brushless joint-control motor soft starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100290072A CN102104356A (en) | 2011-01-18 | 2011-01-18 | Brushless joint-control motor soft starter |
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| Publication Number | Publication Date |
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| CN102104356A true CN102104356A (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100290072A Pending CN102104356A (en) | 2011-01-18 | 2011-01-18 | Brushless joint-control motor soft starter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594225A (en) * | 2012-03-16 | 2012-07-18 | 温州市曙光起动设备有限公司 | Shorting switch for starter of brushless hydraulically-damped motor |
| CN104215074A (en) * | 2013-06-04 | 2014-12-17 | 宁夏嘉翔自控技术有限公司 | Electrical automatic control system for flue gas waste heat utilization system of electrically calcined furnace |
| CN105427973A (en) * | 2016-01-13 | 2016-03-23 | 中国工程物理研究院流体物理研究所 | Pulse high-power inductive resistor |
| WO2017031663A1 (en) * | 2015-08-24 | 2017-03-02 | 尚勤贵 | Centrifugal switch and brushless liquid-resistance electric motor starter with same |
-
2011
- 2011-01-18 CN CN2011100290072A patent/CN102104356A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594225A (en) * | 2012-03-16 | 2012-07-18 | 温州市曙光起动设备有限公司 | Shorting switch for starter of brushless hydraulically-damped motor |
| CN102594225B (en) * | 2012-03-16 | 2014-02-19 | 温州市曙光起动设备有限公司 | Shorting switch for starter of brushless hydraulically-damped motor |
| CN104215074A (en) * | 2013-06-04 | 2014-12-17 | 宁夏嘉翔自控技术有限公司 | Electrical automatic control system for flue gas waste heat utilization system of electrically calcined furnace |
| WO2017031663A1 (en) * | 2015-08-24 | 2017-03-02 | 尚勤贵 | Centrifugal switch and brushless liquid-resistance electric motor starter with same |
| CN105427973A (en) * | 2016-01-13 | 2016-03-23 | 中国工程物理研究院流体物理研究所 | Pulse high-power inductive resistor |
| CN105427973B (en) * | 2016-01-13 | 2017-12-15 | 中国工程物理研究院流体物理研究所 | A kind of high power pulsed ion beams inductive resistance |
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Application publication date: 20110622 |