CN103185161A - Speed-variable actuator - Google Patents
Speed-variable actuator Download PDFInfo
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- CN103185161A CN103185161A CN2013100626699A CN201310062669A CN103185161A CN 103185161 A CN103185161 A CN 103185161A CN 2013100626699 A CN2013100626699 A CN 2013100626699A CN 201310062669 A CN201310062669 A CN 201310062669A CN 103185161 A CN103185161 A CN 103185161A
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Abstract
The invention relates to a speed-variable actuator or a valve actuator which comprises a solid motor controller and a gear set, wherein the solid motor controller can operate a motor at a variable speed, and the gear set can achieve self-braking. The speed and the torque of the valve actuator can be selected, and the speed and the torque, which can be borne by a valve, can be changed in the whole length of a valve stroke. The valve actuator is provided with logic which can achieve a function of a process controller.
Description
The application is for dividing an application, and the application number of original application is PCT/US2008/070545 for the 200880130412.X(international application no), international filing date is on July 18th, 2008, denomination of invention is " variable speed actuator ".
Technical field
The present invention relates in general to a kind of valve actuator that comprises electric motor, and relates more specifically to the control of this valve actuator.
Background technique
Valve actuator is widely used in many industry, for example, and all types of generatings, oil and petroleum chemicals, weaving, papermaking and food preparation.Running speed and be important parameters very by the torque that valve actuator produces.Usually, the fixed speed motor is attached to gear train and provides suitable speed and torque combination for valve really.Motor and gear train must be linked by MANUFACTURER accurately.If MANUFACTURER wants to realize quick turnover that the client is ordered goods, then MANUFACTURER must store various motors and gear train.In addition, must employ and know even the professional staff of hundreds of different assemblings that change sometimes of a kind of simple common valve actuator design.
And even a plurality of client wants to have the valve actuator of identical speed and torque characteristics, these clients also have different power available usually.Client may want to use the three phase mains of the 480VAC of 60Hz, and another user may want to use the single phase poaer supply of the 110VAC of 50Hz, and another client may only have the power available of 24VDC.Thereby system known per did not provide a kind of valve actuator that satisfies the demand of the client with different power available with the ready-made article supply in the past.
At present, if the user wants to change torque and the speed characteristics of valve actuator, then must make actuator quit work, dismantle actuator, subsequently actuator be re-assemblied together with different gear train and/or motor.Need a kind of method that must store with the quantity of the motor of meeting customer need and gear train that reduce.Also need to reduce necessary train employees with the quantity of the model of structure.In addition, speed and the torque that allows control actuator to transmit under the situation of dismounting need do not required.
In addition, the fixed speed valve actuator has limited purposes as process controller, because valve turns round with constant speed all the time.Need to allow valve actuator as the method for process controller running.
A kind of method that addresses these problems is by using the control of rectifier and circuit breaker to send to the electric current of DC motor.Thus, speed and the torque that allows to use high pressure or the low pressure AC electric current of single-phase or three-phase and allow the control motor.The modification of this method is to utilize to the AC rectification, afterwards inverter control AC motor.Yet these methods need be used the torque limit switch.The operator mechanically regulates speed and the torque that is transmitted by valve actuator, but the operator at most only can set peak torque or speed that valve actuator should not surpass.Under the situation of not using limit switch, the operator can not be set in speed or the torque profile that changes on the whole length of Valve travel.Valve actuator comprises that gear train and gear train are arranged in the housing of valve actuator.
Method in the past needs user's governing speed and torque potentiometer, and the speed or the torque profile that do not allow the operator to be set in to change on the whole length of Valve travel.These methods are not provided at the speed of setting valve actuator under the situation of not using big machinery switch and torque limit switch and the method for torque, do not provide valve actuator to can be used as the mechanism of process controller running yet.
Other method that addresses the above problem uses switched reluctance motor and DC motor so that variable velocity to be provided.Yet in these situations, valve actuator needs independent arrestment mechanism to prevent that motor from rotating in the situation that power loss takes place.Need itself just to have the valve actuator that can change speed of stopping power.
Summary of the invention
One embodiment of the present of invention are a kind of valve actuators, comprising: variable speed motor; Be operably connected to the solid state motor controller that variable speed motor also can be set to handle variable speed motor; And the worm screw/worm gear that is operably connected to variable speed motor.
Another embodiment of the present invention is a kind of valve actuator, comprising: general magnetic field contiguous block; Can turn round and receive the power supply changeover device that electric power is supplied with; Variable speed motor; Solid state motor controller and this motor controller of being operably connected to power supply changeover device can be set to handle variable speed motor; And the braking equipment that is operably connected to variable speed motor; Braking equipment comprises gear train.
Another embodiment of the present invention is a kind of valve actuator, comprising: housing; Motor controller; Variable speed motor with output shaft, wherein, variable speed motor is set to be controlled by motor controller; And be integrated into motor controller and variable speed motor in the housing; And the train of gearings that outside housing, also operationally is attached to output shaft.
Specific embodiment of the present invention comprises a kind of method of control valve actuator, and this method comprises: the valve actuator that comprises the solid state motor controller that is operably connected to variable speed motor is provided, and wherein, gear train is operably connected to variable speed motor; Set the speed on the solid state motor controller, the solid state motor controller is with this speed driving variable speed motor when valve actuator turns round; And when power failure takes place, lock variable speed motor with this gear train opposing to rear driving load.
Another embodiment of the present invention comprises the method that activates electric driven valve actuators, this method comprises: receive command signal at the solid-state valve actuator place that is operably connected to the electric driven valve actuators that comprises gear train, wherein, the electricity driven valve actuators can change speed, at solid-state valve actuator controller place receiving feedback signals, whether there are differences between decision instruction signal and the feedback signal; And by activating electric driven valve actuators any difference between command signal and the feedback signal is minimized.
Another embodiment of the present invention is the system for activated valve, and this system comprises: valve actuator, and wherein, valve actuator comprises: motor, wherein motor comprises output shaft; Being operably connected to motor also can be with the solid state motor controller of transformable speed and torque operated motor; And the worm screw/worm gear that is attached to the output shaft of motor.
Description of drawings
Although specification with specifically note and explicit state which claim of regarding content of the present invention as summarize, but those of ordinary skill in the art can more easily understand and understand the present invention by reading the description of this invention below in conjunction with accompanying drawing, in the accompanying drawings:
Fig. 1 is embodiment's the schematic representation of valve actuator that comprises the variable speed of motor controller and variable speed motor;
Fig. 2 shows power supply changeover device and gear train is added among the embodiment shown in Figure 1;
Fig. 3 shows according to embodiments of the invention and merges power supply changeover device and motor controller;
Fig. 4 shows the embodiments of the invention of non-transformer transducer;
Fig. 5 shows and comprises that conduct connects terminal in the magnetic field of the part of valve actuator according to an embodiment of the invention;
Fig. 6 shows the embodiment of the power supply changeover device of anodontia wheels;
Fig. 7 shows an embodiment of valve actuator, and wherein, motor controller and variable speed motor are positioned at independent housing and gear train is positioned at outside the housing.
Fig. 8 shows the embodiment's who comprises the valve actuator according to the present invention valve brake monitor;
Fig. 9 shows one embodiment of the present of invention, and wherein, power supply changeover device is integrated into the part with the motor controller of valve actuator controller communication;
Figure 10 shows one embodiment of the present of invention, and wherein, motor controller is integrated into a part that receives the valve actuator controller of input from power supply changeover device;
Figure 11 shows power supply changeover device, motor controller and valve actuator controller is merged to according to an embodiment of the invention in the individual equipment.
Figure 12 shows the example of the different feedback signal that can be received by motor controller; And
Figure 13 shows valve actuator as the embodiment of process controller running.
Embodiment
Disclosed a kind of valve actuator that comprises electric motor, having comprised: can control the solid state motor controller of motor and prevent that loading force is to returning the gear train that drives output shaft with variable velocity.Speed and torque that can the selector valve actuator.The present invention can eliminate torque limit switch or the torque master of other torque special use and independent arrestment mechanism are installed in valve actuator.
For convenience of explanation, identical reference character is represented components identical in the accompanying drawings.Referring now to Fig. 1, the specific embodiment of valve actuator 100 comprises motor controller 20 and variable speed motor 10.Motor controller 20 receives the electric power input from the input from power supply 90.Motor controller 20 control electric energy export variable speed motor 10 to.Variable speed motor 10 can be attached to valve 80.Replacedly, motor 10 can be attached to actuator gear box (rotation output or linear output), actuator gear box can and then be attached to valve 80 or other from dynamic load.
The motor tabulation of front is not intended to limit, and is intended to provide the example of the various motors that can be used as variable speed motor 10 uses.Can all can be used as adjustable engine 10 by any motor of any controlling method variable speed drives uses.In addition, although servomotor is described to the motor of particular type, it should be understood that motor position feedback can with said motor in any one is integrated.
Shunt excitation DC motor has independent magnetic field and armature power supply.Therefore, need dissimilar control.When magnetic field has fixed power source and during the armature power source change, is called armature voltage control.Armature voltage control makes in whole velocity range torque constant.When magnetic field power supply changes and armature power supply fixedly the time, be called the shunt field and control.Shunt field control provides constant horsepower in whole velocity range.Compound excitation DC motor uses series excitation magnetic field winding and shunt field winding.Motor controller 20 can provide armature voltage control, shunt field control or the control of compound excitation motor.
The brushless DC motor armature that do not wind the line, and use permanent magnet as rotor.Replace brush, the electric current in the magnetic field winding (stacked metal layer) switches when needed repeatedly, makes the p-m rotor rotation to produce the required magnetic field that replaces.PWM is used for the control switch speed at large; Yet motor controller 20 can utilize any suitable method to come control rate and/or torque.
The AC induction motor has wound stator, and can have the winding of band winding or the rotor of conduction " bar " (mouse cage), but electric power only supplies to stator.The most at large by changing the speed of power supply frequency and Control of Voltage AC motor.In specific embodiment of the present invention, motor controller 20 can be frequency conversion drive (VFD).VFD is converted to DC with AC, subsequently the DC current conversion is returned AC.Voltage and the frequency of inverter control AC output wave.Output frequency determines the speed of AC motor.Output voltage determines motor torque.The device that is fit to that can be used for finishing AC to DC conversion comprises for example diode, rectifier, thyristor and SCRs.Can be used for the DC current conversion such as igbt (also claiming IGBT) semiconductor (IGBTs) is the AC electric current.Replacedly, also can use bipolar transistor, FET, MOSFET and transistor transformer.To control syncmotor with the similar mode of induction motor.Motor controller 20 can be the speed that can control AC motor well known in the art and/or any suitable controller of torque.
Fig. 2 shows the embodiments of the invention that valve actuator 100 also comprises power supply changeover device 30 and gear train 40.Power supply changeover device 30 receives the electric power input and the power supply that is fit to is outputed to motor controller 20 from power supply 90.Gear train 40 is attached to the output shaft of variable speed motor 10.Gear train 40 and then be attached to valve 80.
In another embodiment shown in Figure 3, power supply changeover device 30 can be integrated in the same housing of motor controller 20.The part of functions of power supply changeover device 30 or all functions also can be realized by motor controller 20.For example, when VFD used as motor controller 20, VFD also can carry out the function that single-phase AC is converted to three-phase AC.Therefore, do not need independent phase converter.Yet, may expect to use the independent phase converter rather than the VFD that are built in the multiple power source transducer 30 to realize this purpose.VFDs also can carry out the conversion of AC to DC and changing to revolution to AC.Therefore, when motor controller 20 comprised VFD, these aspects of power supply conversion can be carried out by motor controller 20.
In addition, shown in the embodiment of Fig. 4, may have the situation that does not need power supply changeover device 30.Power supply changeover device 30 can be the transformer (for example, adjustable transformer) that can make power supply 90 change to another voltage from a voltage.Power supply changeover device 30 also can be AC to DC transducer, DC to AC transducer, DC to AC inverter or phase converter.Power supply changeover device 30 also can be designed to general power supply changeover device.Therefore, power supply changeover device can be taked any voltage type and current type of generally using and be converted into motor controller 20 spendable forms.In interchangeable embodiment, power supply changeover device can produce low pressure ac and/or dc electric power, low pressure ac and/or dc electric power can be powered to position on the plate or process controller and also can be used as power supply and be powered to drive external means (for example, switch, indicator and state signal).Power supply 90 can be any available power supply.Some examples of power supply 90 comprise: 208 to 609VAC three phase mains, 50 or 60Hz; 120 or the 230VAC single phase poaer supply; The 12VDC power supply; The 24VDC power supply; And 48VDC power supply.Embodiments of the invention may be able to accept any voltage in 24VDC to the 690VAC scope.
Power supply changeover device 30 can be individual equipment or a plurality of equipment.For example, power supply changeover device 30 can comprise aforesaid DC transducer, AC step-down transformer or boosting transformer or phase converter.
With reference to the embodiment of Fig. 5, magnetic field contiguous block (field connection block) 60 also can be incorporated in the valve actuator 100.Can adopt power supply 90 is connected to power supply changeover device 30 or motor controller 20 necessary any way design magnetic field contiguous blocks 60.Magnetic field contiguous block 60 also can be integrated in the individual equipment with power supply changeover device 30 and/or motor controller 20.Magnetic field contiguous block 60 can be designed to the general contiguous block with 30 uses of multiple power source transducer.In this specific embodiment, magnetic field contiguous block 60 can be designed to have suitable rod member, lug, cam lock, pin and sleeve connector or other connection device is handled any voltage or the electric current [strength of being supplied with by power supply 90.Magnetic field contiguous block 60 also can have single bindiny mechanism or a plurality of bindiny mechanism.For example, magnetic field contiguous block 60 can have the rod member that fixedly is useful on the lug of AC electric wire and DC electric wire above single a group, replacedly, magnetic field contiguous block 60 can have one group of rod member and/or lug and one group of rod member and/or lug that is used for the AC electric wire that is used for the DC electric wire.Magnetic field contiguous block 60 also can have many group AC and DC bindiny mechanism.
Magnetic field contiguous block 60 can be designed to: prevent that the operator from carrying out wiring being used for a kind of type electric power to magnetic field contiguous block 60 mistakenly, but in fact supply dissimilar electric power.For example, if the operator expects to use the 480VAC three phase mains, but unexpectedly two 480VAC conductors are connected to one group of DC lug, then may cause problem.Magnetic field contiguous block 60 can be designed to automatically detect the type of the electric current supplied and voltage and take adequate measures, and the mechanism that allows user's identification will supply with which kind of electric current and voltage perhaps can be set.Can realize automatic sensing by sensor well known in the art.Therefore, the controller in the magnetic field contiguous block 60 can make suitable switch gear engage, thereby operator's power supply is electrically connected to the position that is fit to of power supply changeover device 30.The electric adjustment module can receive any possible input voltage of broad range, and allows motor running (if in safety range) or stop motor running.Can increase circuit protection to avoid when electric current is flowed through the contact, attempting changing switch gear.
And, when variable speed motor 10 is AC motor and power supply 90 when being the DC power supply, then may expect the direct supply motor controller 20 of DC power supply, as the part of control variable speed motor 10, the motor controller 20 and then DC power supply is converted to AC power supplies.
The magnetic field contiguous block 60 of valve actuator 100 or any other part can comprise any necessary electric current and voltage protection, for example, adopt the form of circuit breaker and surge voltage protector.
Described all 26S Proteasome Structure and Functions about magnetic field contiguous block 60 can also be integrated in the housing with power supply changeover device 30, motor controller 20 and/or valve actuator controller 50.This housing can be used as the part of valve actuator 100 subsequently to be incorporated in the valve actuator.In addition, magnetic field contiguous block 60 and power supply changeover device 30 can fully integrate.
By using multiple power source transducer 30, the valve actuator MANUFACTURER can be made single valve actuator 100 in the specified size scope, and this valve actuator 100 will be complementary with any power supply 90 that the client may have and as ready-made finished product.In addition, by utilizing variable speed motor 10, valve actuator 100 can be complementary with the valve 80 of broad range.Solid state motor controller 20 allows optimum speed and the torque configuration of given valve 80.Speed and moment of torsion can be set by operator, MANUFACTURER, commercial agent or commission.Therefore, valve actuator 100 among a small circle can satisfy the needs of valve application on a large scale.Valve actuator 100 among a small circle can be produced in a large number, thus the scale cost that can not realize by other valve actuator before realizing.
Valve actuator 100 randomly can comprise gear train 40.The independent member that gear train 40 can be used as the part of valve actuator 100 or can be attached to valve actuator 100 is included in the valve actuator.In one embodiment, gear train 40 can be worm screw/worm gear, and wherein worm shaft directly is attached to the output shaft of variable speed motor 10 and is integrated into the part of valve actuator 100.Worm gear/worm gear itself is used for braking or lock-up valve actuator 100 prevents that valve from changing the position when motor is not switched on.Yet gear train 40 can be other the gear such as planetary gear set.Fig. 6 shows the embodiment who does not have gear train 40.In this embodiment, the output shaft of variable speed motor 10 can directly be attached to valve 80.
It should be understood that in specific embodiment " disc type " motor of quill shaft, a plurality of utmost point, big torque, low speed can be used for holding the also direct actuating valve of valve rod and do not need gear-box.For the quill shaft actuator of direct driving, when actuator stops, still needing actuator " locking " in suitable position.Can with controller actuator be remained on this position on one's own initiative by motor controller being sent the zero-speed instruction.Replacedly, quill shaft design can utilize three motors/handwheel clutch system and by the break of solenoid-activated.Primary importance is included in motor operation or out of service under the situation that the break by solenoid-activated engages under the d/d situation of solenoid brake.The second place comprises that motor breaks away from and break engages (that is, make solenoid invalid).The 3rd position comprises that motor breaks away from, break breaks away from (make solenoid invalid) and handwheel engages.For hand wheel, operating handle moves to the 3rd position, and handwheel turns to the valve position of expectation, and operating handle moves to primary importance or the second place with the maintaining valve position afterwards.
Fig. 7 shows has gear train 40 but variable speed motor 10 and motor controller 20 are placed in the embodiment in the independent housing 70 in the valve actuator 100.Power supply changeover device 30 also can be placed in the housing 70.In one embodiment, housing 70 is motor casing.For example, motor controller 20 and power supply changeover device 30 can place motor casing.Replacedly, motor controller 20 and power supply changeover device 30 can place on the motor casing 70.In such an embodiment, motor controller 20 and power supply changeover device 30 can be via the hole in the housing 70 with being wired to variable speed motor 10.Motor controller 20 and power supply changeover device 30 can suitably be hidden, so that housing 70 has any desired NEMA grade, for example NEMA4.In addition, in the embodiment of Fig. 7, can not comprise power supply changeover device 30, perhaps power supply changeover device 30 can be integrated into individual equipment with motor controller 20.Valve actuator controller 50 also can place housing 70.Motor controller 20 also can be integrated in the valve actuator controller 50.
Valve 80 can be many rotary valves or 90 degree rotary valves.Valve 80 can be ball valve, sluice valve, gate valve, fly valve, stopcock, ball gate valve or multiposition valve.Valve 80 comprises any load that is driven by valve or other actuator, can handle this load by the variable speed motor 10 that has or do not have gear train 40.
With reference to Fig. 8, valve actuator 100 also can comprise valve actuator controller 50.In specific embodiment, valve actuator controller 50 places the actuator casing 70 of valve actuator 100.Yet replacedly, valve actuator controller 50 can place the outside of actuator casing 70.For example, valve actuator controller 50 can be installed near the valve actuator 100 the supporting structure, and wherein electrical lead is connected to valve actuator 100 with valve actuator controller 50.
In one embodiment, as shown in Figure 8, valve actuator controller 50 control motor controllers 20.Motor controller 20 can separate with power supply changeover device 30 as shown in Figure 8, and perhaps power supply changeover device 30 can be integrated in the motor controller 20 as shown in Figure 9.Fig. 8 shows the valve actuator controller 50 that separates with motor controller 20.Replacedly, valve actuator controller 50 can directly receive electric power from power supply 90, and valve actuator controller 50 can be sent to power supply 90 with output signal and state indication.Yet as shown in figure 10, motor controller 20 can be integrated into individual equipment with valve actuator controller 50.Figure 11 shows power supply changeover device 30 can also be integrated into individual equipment with valve actuator controller 50 and motor controller 20.
Although it should be understood that there is shown is integrated into motor controller 20 in the valve actuator controller 50, can regard that also valve actuator controller 50 is integrated in the motor controller 20 as.Similarly, the function of motor controller 20 and/or 50 execution of valve actuator controller also can be carried out by power supply changeover device 30.
The example of the signal that can be sent by valve actuator controller 50 comprises the request signal to other system of sensor, behaviour's manipulator, motor controller 20, variable speed motor 10 and valve actuator 100 outsides.
As among the embodiment of process controller, valve actuator controller 50 is set to receiving course command signal and process feedback signal at the valve actuator controller.The process instruction signal shows that the process of expectation changes set point.The virtual condition of process feedback signal procedure for displaying variable.Therefore, valve actuator controller 50 judges between two signals whether error is arranged, and modulating valve and error being reduced in the receivable scope of setting.Valve actuator controller 50 can comprise the control response of any kind, and for example, proportional control, proportional-plus-integral control, proportional-plus-integral add differential control or ratio adds differential control.
Valve actuator 100 can be by operator's setting with the variable speed drive valve.The operator can be close to the ad infinitum speed of control valve 80 runnings.The operator can be valve actuator 100 selects setting speed that but it is turned round or the input speed curve under setting speed.Velocity curve allows the operator that the different piece of valve 80 strokes is specified different valve speed.The operator also can be set under the friction speed and in the torque of the transferable permission of diverse location of valve 80 strokes.Therefore, can be before valve 80 be opened, when opening valve 80 first, valve 80 cuts out preceding or torque and the speed of limiting valve 80 during cut-off valve 80 first.In specific embodiment, valve actuator controller 50 and/or motor controller 20 are solid-state controllers, and having eliminated needs the torque limit switch to identify when should to change speed or torque.Replace, can use the motor position that passes through feedback signal 15 acquisitions of motor controller 20 and torque and/or the speed that torque determines when restriction or change valve 80.For example, can infer torque by the information of motor current, voltage, temperature, counterelectromotive force (EMF), Magnetic leakage flux or above-mentioned every combination in any.Therefore, when valve actuator controller 50 was solid-state controller, the operator can change the position that reduces or increase along the speed of Valve travel, and needn't regulate mechanical switch.
Because the operator can change constant speed or the velocity curve of valve 80, so can realize greater flexibility by determining overall system gain.For example, higher valve speed and higher system gain are equal to, and on the contrary, lower valve speed is equal to lower system gain.And because the relation between valve speed and the system gain, the ability of the variable speed of valve actuator 100 provides the instrument of accurate adjustment control system for the operator.This is being difficult to find steadily possible advantageous particularly in the following control system of sensitivity of tuning constant of permission system.
In addition, in case selected tuning constant, the operator can change the speed of valve 80, and does not change tuning constant.This has in limited group the process of tuning constant the operator is especially favourable, avoids the PID controller that goes wrong thus, for example, and integration saturation problem and other problem well known in the art.In this scheme, modulating valve speed may be more favourable than changing the controller tuning constant.
For example, many operators attempt being not related to closed procedure and carry out maintenance to valve.Replace, the operator fully turns round up to the fixed time in every year valve with attempting, and whole process will be fully closed and once finish any required maintenance this moment.Therefore, when valve began viscous, certain operations person attempted the tuning constant of adjusting color controls to compensate the valve of viscous.In essence, for the similar actual result of valve process status before approaching and the viscous, the operator can change the controller tuning constant and change the position as early as possible or to a greater degree to attempt the order valve.Replacedly, closed loop position controller of the present invention can be adjusted to motor voltage full voltage (maximum tq) to attempt reaching command speed as required strategic point always.The operator can come the action of control actuator by the Ki constant in the timing parameters of regulating timer or controller when valve becomes viscous more and more.
Yet, for complexity or responsive system, may have limited group the tuning constant of in fact realizing stabilization process.Change the speed at valve 80 places rather than only change fixing speed by governor valve actuator controller 50, valve has any problem all can regulate or produce the valve velocity curve to adapt to.If valve is viscous when opening only, then when opening first, valve can supply with bigger torque.If valve in the middle viscous of Valve travel, then can gather way in the scope of valve viscous or torque.
Valve actuator controller 50 is described as an example of temperature course controller with reference to Figure 13.Reaction vessel 200 has heating resistance collar 210 in its side periphery.The input and output of not shown reaction vessel 200.Pipeline 220 arrives heating resistance collar 210 with hot water supply.Heat from the hot water in the heating resistance collar 210 is delivered to reaction vessel 200.The flow velocity that newly advances hot water that flows into heating resistance collar 210 is more fast, and the temperature of reaction vessel 200 is more high.The flow velocity of hot water is by valve 80 controls.The entrance of valve 80 is connected to pipeline 260.Hot water via heating resistance collar 210 circulations is discharged from pipeline 270.By valve actuator 100 valve 80 is rotated.Signal 240 is the process instruction signals of temperature set-point that send to the Indicator Reaction container 200 of valve actuator controller 50.Not shown signal source among Figure 13.Signal 240 and 250 can be: the form of 0-20 or 5-20mA signal; The form of 0-10 or 0-50mV signal; The form of 0-5,1-5 or 1-10Vdc signal; Perhaps at digital communication bus (network communication protocol (Modbus), field bus technique (Foundation Fieldbus), Field bus (Profibus), ASi, facility network (DeviceNet), internet (Internet), Ethernet (Ethernet) etc.) digital information; Perhaps any other controller signals form.Signal 250 is the process feedback signals that send to valve actuator controller 50 from temperature transducer 230.
In order to simplify, in this example, suppose that the position of valve 80 is demarcated to different flow rate of hot water.In practice, at least one hot water flow sensor and other sensor also can pass the signal to valve actuator controller 50.In addition, can use the temperature transducer 230 of any amount.
When temperature transducer 230 detected the minor variations of temperature, valve actuator controller 50 can respond the variation that corresponding small quantity takes place with low relatively speed in the position that makes valve 80.Replacedly, descend if temperature transducer detects very big temperature, then valve actuator controller 50 can make valve 80 open to a greater degree with high relatively speed.Valve actuator controller 50 can have given group speed, for example, low-down speed, low speed, middling speed, high speed and very high speed, thus which speed activated valve 80 difference degree between basis signal 240 and the signal 250 determines with.Valve actuator controller 50 also can have the unlimited many speed that is close to, can these speed activated valve 80.Valve actuator controller 50 can be set to the also variation of testing signal 240 of the difference between the testing signal 240 and 250 not only itself.For example, if the operator significantly increases temperature set-point, then valve actuator controller 50 can be opened valve 80 lentamente and the temperature of reaction vessel 200 is raise gradually.Yet if the variation of signal 250 is roots of the difference between signal 250 and 240, valve actuator controller 50 can impel valve 80 promptly to change the position.
The present invention also comprises following specific embodiment and conception:
1. valve actuator comprises:
Variable speed motor;
Be operably connected to the solid state motor controller that described variable speed motor also can be set to handle described variable speed motor; And
Be operably connected to the gear train of described variable speed motor.
2. valve actuator as claimed in claim 1, wherein, described variable speed motor is selected the group that the DC brushless motor of the AC synchronous reluctance motor of the AC synchronous reluctance motor of free strip motor position feedback, no motor position feedback, the DC brushless motor of being with the motor position feedback and band motor position feedback is formed.
3. valve actuator as claimed in claim 1, wherein, described variable speed motor is the AC motor, and this AC motor is selected from the group of being made up of single-phase induction motor, polyphase induction motor, wound rotor motor, many speed motor, constant torque motor, variable torque motor, general motor, synchronous hysteresis motor, DC excitation syncmotor, servomotor, brushless servo motor and linear motor.
4. valve actuator as claimed in claim 1, wherein, variable speed motor is the DC motor, and this DC motor is selected from the group of being made up of shunt excitation DC motor, series excitation DC motor, compound excitation DC motor, brushless DC motor, linear motor, brushless linear motor, core free motor, ring motor, minor axis type motor, finite angle torque motor, permanent magnetism stepper motor, variable reluctance motor, switched reluctance motor and servomotor.
5. valve actuator as claimed in claim 1 also comprises power supply changeover device.
6. valve actuator as claimed in claim 5, wherein, described power supply changeover device can be operated and carry out one of following function or multinomial: AC to AC conversion, DC to DC conversion, AC to DC change; DC to AC changes; And phase transition.
7. valve actuator as claimed in claim 5, wherein, described power supply changeover device and described solid state motor controller are integrated into individual equipment.
8. valve actuator as claimed in claim 1 also comprises and can operate and control the valve actuator controller of described motor controller.
9. valve actuator as claimed in claim 1, wherein, described solid state motor controller can be operated and change speed and the torque of described variable speed motor.
10. valve actuator as claimed in claim 1, wherein, described solid state motor controller has one group of previously selected speed and torque, operates described variable speed motor with these speed and torque.
11. valve actuator as claimed in claim 1, wherein, described solid state motor controller has the previously selected torque that is limited by the user.
12. valve actuator as claimed in claim 1, wherein, speed and torque when the operator can regulate the running of described variable speed motor.
13. valve actuator as claimed in claim 1, wherein, described solid state motor controller has one group of previously selected speed and torque curve, operates described variable speed motor with these speed and torque curve.
14. valve actuator as claimed in claim 1, wherein, described gear train is integrated into described valve actuator.
15. valve actuator as claimed in claim 1, wherein, described gear train is in the outside of holding described solid state motor controller.
16. valve actuator as claimed in claim 1, wherein, described gear train can operate directly cooperate with the valve rod of valve.
17. valve actuator as claimed in claim 1, wherein, described gear train can be operated with quill shaft or linear motor with the load that can directly be attached to valve or be driven by actuator and directly cooperate.
18. valve actuator as claimed in claim 1, wherein, described gear train can operate with have three motors/handwheel clutch system and directly cooperated by the quill shaft of the break of solenoid-activated.
19. valve actuator as claimed in claim 1 also comprises the valve actuator controller.
20. valve actuator as claimed in claim 19, wherein, described valve actuator controller is integrated into described valve actuator.
21. valve actuator as claimed in claim 19, wherein, described valve actuator control can operate to send and receive signal.
22. valve actuator as claimed in claim 21, wherein, the signal of reception comprises: command signal, feedback signal, process variable set point signal, position signal, process variables feedback signal and motor position signal.
23. valve actuator as claimed in claim 19, wherein, proportional control, proportional-plus-integral control, the ratio of the actuating implementation that described valve actuator controller can be by control valve adds differential control or proportional-plus-integral adds differential control.
24. valve actuator as claimed in claim 19, wherein, described valve actuator controller comprises for determining to be used for the speed of activated valve and the logic of torque.
25. valve actuator as claimed in claim 19, wherein, described motor controller is integrated into described valve actuator controller inside.
26. valve actuator as claimed in claim 1 also comprises the magnetic field contiguous block that operationally is attached to described motor controller.
27. valve actuator as claimed in claim 26, wherein, described magnetic field contiguous block operationally is attached to power supply changeover device, and described power supply changeover device operationally is attached to described motor controller.
28. valve actuator as claimed in claim 26, wherein, described magnetic field contiguous block is general magnetic field contiguous block.
29. a valve actuator comprises:
General magnetic field contiguous block;
Can operate to receive the power supply changeover device that electric power is supplied with;
Variable speed motor;
Be operably connected to the solid state motor controller and the described motor controller that can be set to handle described variable speed motor of described power supply changeover device; And
Be operably connected to the braking equipment of described variable speed motor; Described braking equipment comprises gear train.
30. a valve actuator comprises:
Housing;
Motor controller;
Variable speed motor with output shaft, wherein, described variable speed motor is set to by described motor controller control; And
Described motor controller and described variable speed motor are integrated in the described housing; And
Outside described housing, also operationally be attached to the train of gearings of described output shaft.
31. valve actuator as claimed in claim 30 also comprises the power supply changeover device that operationally is attached to described motor controller.
32. valve actuator as claimed in claim 30, wherein, described housing is motor casing.
33. valve actuator as claimed in claim 32, wherein, described motor casing is in actuator casing.
34. a system that is used for activated valve, described system comprises:
Valve actuator, wherein, described valve actuator comprises:
Motor, wherein, described motor comprises output shaft; And
Be operably connected to described motor and also can handle the solid state motor controller of described motor with transformable speed and torque; And
Be attached to the gear train of the described output shaft of described motor.
35. the method for a control valve actuator, described method comprises:
The valve actuator that comprises the solid state motor controller that is operably connected to variable speed motor is provided, and wherein, gear train is operably connected to described variable speed motor;
Set the speed on the described solid state motor controller, the solid state motor controller will be with the described variable speed motor of this speed driving when described valve actuator turns round;
When power failure takes place, lock described variable speed motor with described gear train opposing to rear driving load.
36. method according to claim 35 also comprises the torque of setting on the described solid state motor controller, produces this torque by described variable speed motor when described valve actuator turns round.
37. a method that activates electric driven valve actuators, described method comprises:
Receive command signal at the solid-state valve actuator controller place that is operably connected to the electric driven valve actuators that comprises gear train, wherein, described electric driven valve actuators can change speed;
At described solid-state valve actuator controller place receiving feedback signals;
Judge between described command signal and the described feedback signal whether there are differences; And
By activating described electric driven valve actuators the difference between described command signal and the described feedback signal is minimized.
38. according to the described method of claim 37, wherein, described command signal comprises the process variable set point signal, described feedback signal comprises the process variables feedback signal.
39. according to the described method of claim 38, wherein, difference between described command signal and the described feedback signal is minimized comprise with constant speed and activates described electric driven valve actuators by driving described electric driven valve actuators.
40. according to the described method of claim 39, wherein, described constant speed is determined by described valve actuator controller.
41. according to the described method of claim 39, wherein, described constant speed is set by the operator.
42. according to the described method of claim 38, wherein, difference between described command signal and the described feedback signal is minimized comprise with constant torque and activates described electric driven valve actuators by activating described electric driven valve actuators.
43. according to the described method of claim 38, wherein, by activating whole length that described electric driven valve actuators minimizes difference between described command signal and the described feedback signal to be included in Valve travel with the described electric driven valve actuators of shift actuation.
44. according to the described method of claim 43, wherein, speed change or maximum permission speed are determined by the user.
45. according to the described method of claim 43, wherein, speed change is determined by described valve actuator controller.
46. according to the described method of claim 37, wherein, described command signal comprises position command signal, described feedback signal comprises the motor position signal.
47. according to the described method of claim 46, wherein, send described motor position signal from motor controller.
48. according to the described method of claim 46, wherein, described motor position signal is the result from the inquiry of described valve actuator controller.
49. according to the described method of claim 37, wherein, described valve actuator controller can be carried out proportional control, proportional-plus-integral control, ratio adds differential control or proportional-plus-integral adds differential control.
50. according to the described method of claim 37, wherein, described valve actuator controller is integrated in the housing of described electric driven valve actuators.
51. according to the described method of claim 37, wherein, described feedback signal comprises the signal that can determine speed, torque or position according to this.
Although set forth the present invention more all sidedly with reference to concrete preceding method and embodiment, the present invention is limited by following claim.Those of ordinary skill in the art it is evident that, can carry out many different modification to aforesaid method with embodiment under the situation that does not deviate from the principle and scope of the present invention.Therefore, the present invention only is defined by the claims.
Claims (10)
1. valve actuator comprises:
Housing;
Motor controller;
Variable speed motor with output shaft, wherein, described variable speed motor is set to by described motor controller control; And
Described motor controller and described variable speed motor are integrated in the described housing; And
Outside described housing, also operationally be attached to the train of gearings of described output shaft.
2. valve actuator as claimed in claim 1 also comprises the power supply changeover device that operationally is attached to described motor controller.
3. valve actuator as claimed in claim 1, wherein, described variable speed motor is selected the AC synchronous reluctance motor of the AC synchronous reluctance motor of free strip motor position feedback, no motor position feedback, the DC brushless motor of band motor position feedback and the group of not forming with the DC brushless motor of motor position feedback.
4. valve actuator as claimed in claim 1, wherein, described variable speed motor is the AC motor, and this AC motor is selected from the group of being made up of single-phase induction motor, polyphase induction motor, wound rotor motor, many speed motor, constant torque motor, variable torque motor, general motor, synchronous hysteresis motor, DC excitation syncmotor, servomotor, brushless servo motor and linear motor.
5. valve actuator as claimed in claim 1, wherein, variable speed motor is the DC motor, and this DC motor is selected from the group of being made up of shunt excitation DC motor, series excitation DC motor, compound excitation DC motor, brushless DC motor, linear motor, brushless linear motor, core free motor, ring motor, minor axis type motor, finite angle torque motor, permanent magnetism stepper motor, variable reluctance motor, switched reluctance motor and servomotor.
6. valve actuator as claimed in claim 1 also comprises the valve actuator controller.
7. valve actuator as claimed in claim 6, wherein, described valve actuator controller is integrated into described valve actuator.
8. valve actuator as claimed in claim 6, wherein, described motor controller is integrated in the described valve actuator controller.
9. valve actuator as claimed in claim 1 also comprises the magnetic field contiguous block that operationally is attached to described motor controller.
10. the method for a control valve actuator, described method comprises:
Provide claim 1 described valve actuator;
Set the speed on the described motor controller, motor controller is with the described variable speed motor of this speed driving when described valve actuator is operated; And
When power failure took place, described gear train opposing locked described variable speed motor to rear driving load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310062669.9A CN103185161B (en) | 2008-07-18 | 2008-07-18 | variable speed actuator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310062669.9A CN103185161B (en) | 2008-07-18 | 2008-07-18 | variable speed actuator |
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| CN200880130412.XA Division CN102099607B (en) | 2008-07-18 | 2008-07-18 | Variable speed actuator |
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| CN103185161A true CN103185161A (en) | 2013-07-03 |
| CN103185161B CN103185161B (en) | 2016-07-06 |
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| CN101061339A (en) * | 2004-11-12 | 2007-10-24 | 美格特克系统公司 | Electric gear motor drive for switching valve |
| CN101113793A (en) * | 2007-07-20 | 2008-01-30 | 孙力 | Frequency conversion type intelligent type valve actuator |
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|---|---|---|---|---|
| US20060081208A1 (en) * | 2004-03-25 | 2006-04-20 | Sturdy Corporation | Charge motion control valve actuator |
| CN101061339A (en) * | 2004-11-12 | 2007-10-24 | 美格特克系统公司 | Electric gear motor drive for switching valve |
| CN2793483Y (en) * | 2005-05-31 | 2006-07-05 | 浙江科达阀门有限公司 | Intelligent electric executing mechanism with variable frequency |
| CN1877983A (en) * | 2005-06-09 | 2006-12-13 | 西部电机株式会社 | Frequency conversion controller controlled by electronic control unit |
| CN101113793A (en) * | 2007-07-20 | 2008-01-30 | 孙力 | Frequency conversion type intelligent type valve actuator |
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| CN103185161B (en) | 2016-07-06 |
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