CN208057425U - Centrifugal pump and magneto safe running control device - Google Patents
Centrifugal pump and magneto safe running control device Download PDFInfo
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- CN208057425U CN208057425U CN201820500140.9U CN201820500140U CN208057425U CN 208057425 U CN208057425 U CN 208057425U CN 201820500140 U CN201820500140 U CN 201820500140U CN 208057425 U CN208057425 U CN 208057425U
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000036760 body temperature Effects 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims abstract description 13
- 238000010168 coupling process Methods 0.000 claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 29
- 238000000926 separation method Methods 0.000 claims description 13
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 18
- 230000037452 priming Effects 0.000 description 15
- 230000008569 process Effects 0.000 description 14
- 239000012071 phase Substances 0.000 description 12
- 230000002159 abnormal effect Effects 0.000 description 10
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- 230000005284 excitation Effects 0.000 description 7
- 230000005389 magnetism Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
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- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000009931 harmful effect Effects 0.000 description 3
- 231100001261 hazardous Toxicity 0.000 description 3
- 230000002427 irreversible effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
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- 238000012546 transfer Methods 0.000 description 3
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- 238000007792 addition Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
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Abstract
The utility model provides centrifugal pump and magneto safe running control device.Impeller is set in the utility model in centrifugal pump casing, the pump housing axis driving end socket pump bearing and pump end cap of impeller, inlet and outlet are opened up on pump case, noise transducer is arranged in water outlet, setting pump body temperature sensor and pump housing vibrating sensor, noise transducer, pump body temperature sensor and pump housing vibrating sensor connect servo-driver by electric wire at pump end cap；Setting stator and rotor in the motor casing of permanent magnet synchronous motor, the motor shaft driving end cap of rotor connects motor bearings and electric motor end cap, first temperature sensor is set on the outer wall of motor casing, second temperature sensor is set at electric motor end cap and motor oscillating sensor, the first temperature sensor, second temperature sensor and motor oscillating sensor connect servo-driver by electric wire；Motor shaft is connected with pump housing axis by shaft coupling, and servo-driver electricly connects permanent magnet synchronous motor by frequency converter.
Description
Technical field
The utility model belongs to field of mechanical technique, is related to a kind of mating reaction of pump and motor, especially a kind of centrifugation
Pump and magneto safe running control device.
Background technology
Motor complements each other with pump, has constructed the sizable basis and market of traditional industry jointly.With the work of pump
Environment is more various, and the uncontrollable factor of operating mode variation gradually increases, and pump is made to maintain efficiency operation state jointly with motor
Be not only energy-saving and emission-reduction needs and market to cost-effective inevitable trend.During pump is used cooperatively with motor, often
It will appear some common problems, such as vibrate excessive, temperature rises serious, and noise is big etc., seriously affects working efficiency, and to equipment
Service life also has prodigious damage.
Permanent magnet synchronous motor is the synchronous motor that synchronous rotary magnetic field is generated by permanent magnet excitation, and permanent magnet is produced as rotor
Raw rotating excitation field, threephase stator winding, by armature-reaction, incude three-phase symmetrical electric current under rotating excitation field effect.What it was designed
Accuracy is also just more harsh to the environment of its work.If design or improper use, magneto is in excessive temperature, or in play
It is possible to generate irreversible demagnetization when strong mechanical shock, or is loss of excitation, so that motor performance is reduced, or even can not use.So
Monitoring is necessary in real time for temperature and Oscillation Amplitude to motor.Same problem is in the design and use excessively of pump
Clearly.
Utility model content
The purpose of this utility model is the presence of the above problem in view of the prior art, it is proposed that it is a kind of by monitor in real time from
Heart pump and magneto, collecting temperature information, vibration information and noise information, may to it to judge working condition residing for the two
The centrifugal pump and magneto safe running control device that existing failure is estimated and prevented in advance.
The purpose of this utility model can be realized by following technical proposal：Centrifugal pump and magneto safety running control
Device, including centrifugal pump, permanent magnet synchronous motor and servo-driver, the centrifugal pump include pump case, have pump in the pump case
Chamber, is arranged impeller in the pump chamber, and pump housing axis is worn at the center of the impeller admittedly, the driving end socket pump bearing of the pump housing axis and
The pump case is stretched out after pump end cap, opens up inlet and outlet on the pump case, described in the water inlet is connected to by tube chamber
The impeller channel of pump chamber, the impeller channel are connected to a spiral case, and the spiral case is connected to a gas-liquid separation chamber, the gas-liquid separation chamber
Top be connected to above-mentioned water outlet, the bottom of the gas-liquid separation chamber is connected to return passage, and the return passage is connected to by return port
Noise transducer is arranged in the impeller channel, the water outlet, and pump body temperature sensor, institute is arranged in the side of the pump end cap
It states and pump housing vibrating sensor, the signal output end of the noise transducer, the signal of pump body temperature sensor is set on pump end cap
The signal output end of output end and pump housing vibrating sensor connects the servo-driver by electric wire；The permanent magnet synchronous electric
Machine includes motor casing, and setting stator and rotor, the center of the rotor are installed with motor shaft, the motor shaft admittedly in the motor casing
Driving end cap connect motor bearings and electric motor end cap after stretch out the motor casing, the first temperature is set on the outer wall of the motor casing
Second temperature sensor is arranged in the side of sensor, the electric motor end cap, and motor oscillating sensor is arranged on the electric motor end cap,
The letter of the signal output end of first temperature sensor, the signal output end of second temperature sensor and motor oscillating sensor
Number output end connects the servo-driver by electric wire；Lead between driving end and the driving end of pump housing axis of the motor shaft
It crosses shaft coupling to be connected, the servo-driver electricly connects the permanent magnet synchronous motor by frequency converter.
This centrifugal pump is with magneto safe running control device, and permanent magnet synchronous motor is as power source, permanent-magnet synchronous
Motor replaces electrical excitation winding as magnetic potential source using permanent magnet, and the magnetic flux and magnetic potential that it is externally provided are with external magnetic circuit magnetic conductance and electricity
The variation of pivot magnetic reaction fields and change automatically.Permanent magnet by violent vibration after either being beaten, it is possible to cause in it
Portion's magnetic domain changes, and after the magnetic moment direction of magnetic domain changes, magnet steel magnetic property can be deteriorated, and will result in magnet steel demagnetization.Forever
The variation of magnetic-synchro motor temperature can also cause the variation of magnet steel performance, and when temperature is more than certain value, magnetism of material energy will be gradual
It reduces, after temperature is restored, remanent magnetism will not restore, and cause irreversible demagnetization.
For centrifugal pump as carrier, this sentences self priming centrifugal pump as sample.Self priming centrifugal pump abbreviation self priming pump, self-priming
The self-priming process of pump include gas-liquid mixing process, gas-liquid separation process and self-suction circulation liquid process recycling.In self priming pump certainly
It is a kind of two-phase flow structure of complexity, interior flow field especially impeller outlet injection liquid and return port withdrawing fluid to be drawn through journey
Between the shear layer that is formed, speed up gas and liquid mixing and the formation and growth of cavity flow, and then accelerate the dissolving and discharge of gas.By
Draw liquid used in self-priming process, often only nominal situation when half, therefore self priming pump is required when self-priming process opens
Dynamic torque is much smaller compared with when running well, this also with permanent magnet synchronous motor starting torque is smaller matches, reduce permanent-magnet synchronous
The starting load of motor prevents the generation of overload.Once pump body temperature is excessively high, mechanical seal can be impacted, may be drawn
Leakage is played, motor bearings damage is even resulted in, is unfavorable for working normally.
The shaft of pump is generally connected directly with the shaft of motor so that the dynamic property of pump and the dynamic property of motor are mutual
Interference；In high speed rotation, dynamic and static balance fails to meet the requirements, cause with the component of fluid matasomatism by current conditions influenced compared with
Greatly；The complexity of fluid motion itself and a factor of restrictive pump dynamic property stability.The vibration generated is pumped to equipment
Itself is impacted, and shortens the service life.Secondly, the vibration of pump will also result in harmful effect when being transmitted to other equipment.Pump and motor
It is generated with the use of the noise that in the process, can also aggravate motor.The noise that motor generates is mainly derived from bearing, and motor is most absolutely
Number selects rolling bearing, specifically includes ball bearing and roller bearing.Rolling bearing has inner ring, outer ring, therebetween also ball/rolling
Column and retainer, in motor rotary course, these elements have relative motion, lead to irregular friction and collision and generate
Noise, it is especially particularly evident in the case where motor runs at high speed.
After servo-driver experienced analog, mode mixture formula development, the digital epoch have been come at present.
Full digital servo-driver not only overcomes the problems such as large dispersion of analog servomechanism, drift, low reliability, also abundant hair
The flexible of the digital control advantage in control accuracy and control method has been waved, servo-driver is made to be not only simple in structure, and
Performance is more reliable.Servo-driver is mainly made of servo control unit, power drive unit, communication interface unit, and
Connect matched permanent magnet synchronous motor and corresponding feedback detector part.
Shaft coupling needs to ensure good balance and sensibility, and plum coupling has larger axial, radial direction and angle
Simple in structure to compensation ability, radial dimension is small, light-weight, and rotary inertia is small, is suitable for high speed occasion, so selecting plum
Flower shaft coupling.
The occupation mode of noise transducer, temperature sensor and vibrating sensor is the prior art.Noise transducer, temperature
It is the prior art to spend sensor, vibrating sensor and the connection type of servo-driver, signal transfer function.Servo-driver
The circuit structure of electric control permanent magnet synchronous motor and automatically controlled application are the prior art.
In above-mentioned centrifugal pump and magneto safe running control device, card sets solid between the rotor and motor shaft
Determine key, screens slot is set on the inner wall of the rotor, recessed keyway on the outer wall of the motor shaft, a part for the retainingf key
In embedded keyway, form a fixed connection in another part insertion screens slot.Rotor is formed reliably with motor shaft by keyway arrangements
Be connected, to ensure to rotate synchronously together.
In above-mentioned centrifugal pump and magneto safe running control device, the both ends of the motor shaft are socketed with
Motor bearings is stated, the motor bearings is formed by supporting rack and the motor casing and is fixedly mounted, the motor bearings and motor
V-shaped seal ring is set between end cap.By the rotational support of motor bearings, motor shaft is made to transfer out steering power.Pass through V
Type sealing ring effectively realizes the sealing function of motor bearings end.
In above-mentioned centrifugal pump and magneto safe running control device, wind is installed on the tail end of the motor shaft
The peripheral closure of fan, the fan is equipped with case, and the case is fixedly connected with the motor casing.Stator and rotor can produce at work
Raw a large amount of heat, fan is driven by motor shaft and is rotated synchronously, and when motor works, can be generated distinguished and admirable as motor shaft rotates
It radiates to motor.
In above-mentioned centrifugal pump and magneto safe running control device, it is arranged on the outer wall of the motor casing several
Radiating fin, several radiating fins are in arranged in parallel.By several radiating fins on housing exterior walls, further carry out pair
The cooling effect of motor.
In above-mentioned centrifugal pump and magneto safe running control device, dredging mouth is arranged in the side of the pump case,
The dredging mouth is connected to the tube chamber, and dredging valve is arranged on the dredging mouth.Since self priming pump often conveys solid-liquid two-phase
Flow medium is needed to open normally closed dredging mouth and be cleared up after a period of time that works.
Compared with prior art, this centrifugal pump and magneto safe running control device, by analog simulation, in Liang Tai
The suitable operating point of equipment is equipped with corresponding sensor, monitors required state parameter in real time, more by temperature, vibration and noise
Aspect test and assess, real-time parameter is transferred to control system, and analyze assessment its there may be the problem of, feed back to corresponding control
Element plays advance preventive effect, to ensure the safe and reliable operation of pump and motor；And realize and accurately control, reach efficient
Energy-efficient effect.
Description of the drawings
Fig. 1 is the structural schematic diagram of this centrifugal pump and magneto safe running control device.
Fig. 2 is the control system block diagram of the utility model.
In figure, 1, pump case；1a, water inlet；1b, water outlet；2, impeller；3, pump housing axis；4, pump bearing；5, end cap is pumped；6,
Spiral case；7, gas-liquid separation chamber；8, return passage；9, dredging mouth；10, noise transducer；11, pump body temperature sensor；12, the pump housing shakes
Dynamic sensor；13, motor casing；14, stator；15, rotor；16, motor shaft；17, fan；18, radiating fin；19, the first temperature
Sensor；20, second temperature sensor；21, motor oscillating sensor；22, shaft coupling；23, servo-driver.
Specific implementation mode
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
As shown in Figure 1, this centrifugal pump and magneto safe running control device, including centrifugal pump, permanent magnet synchronous motor
With servo-driver 23, centrifugal pump includes pump case 1, has pump chamber in pump case 1, and impeller 2 is arranged in pump chamber, and the center of impeller 2 is solid
Pump housing axis 3 is worn, pump case 1 is stretched out after the driving end socket pump bearing 4 and pump end cap 5 of pump housing axis 3, water inlet 1a is opened up on pump case 1
The impeller channel of pump chamber is connected to by tube chamber with water outlet 1b, water inlet 1a, impeller channel is connected to a spiral case 6, the connection of spiral case 6 one
The top of gas-liquid separation chamber 7, gas-liquid separation chamber 7 is connected to water outlet 1b, and the bottom of gas-liquid separation chamber 7 is connected to return passage 8, return passage
8 are connected to impeller channel by return port, and noise transducer 10 is arranged at water outlet 1b, and pump body temperature is arranged in the side of pump end cap 5
Sensor 11 pumps setting pump housing vibrating sensor 12 on end cap 5, the signal output end of noise transducer 10, pump body temperature sensing
The signal output end of device 11 and the signal output end of pump housing vibrating sensor 12 connect servo-driver 23 by electric wire；Permanent magnetism
Synchronous motor includes motor casing 13, and stator 14 is arranged in motor casing 13 and rotor 15, the center of rotor 15 are installed with motor shaft 16 admittedly,
The driving end cap of motor shaft 16 stretches out motor casing 13 after connecing motor bearings and electric motor end cap, is arranged first on the outer wall of motor casing 13
Second temperature sensor 20 is arranged in the side of temperature sensor 19, electric motor end cap, and motor oscillating sensor is arranged on electric motor end cap
21, the signal output end of the first temperature sensor 19, the signal output end of second temperature sensor 20 and motor oscillating sensor
21 signal output end connects servo-driver 23 by electric wire；The driving end of driving end and the pump housing axis 3 of motor shaft 16 it
Between by shaft coupling 22 be connected, servo-driver 23 electricly connects permanent magnet synchronous motor by frequency converter.
This centrifugal pump is with magneto safe running control device, and permanent magnet synchronous motor is as power source, permanent-magnet synchronous
Motor replaces electrical excitation winding as magnetic potential source using permanent magnet, and the magnetic flux and magnetic potential that it is externally provided are with external magnetic circuit magnetic conductance and electricity
The variation of pivot magnetic reaction fields and change automatically.Permanent magnet by violent vibration after either being beaten, it is possible to cause in it
Portion's magnetic domain changes, and after the magnetic moment direction of magnetic domain changes, magnet steel magnetic property can be deteriorated, and will result in magnet steel demagnetization.Forever
The variation of magnetic-synchro motor temperature can also cause the variation of magnet steel performance, and when temperature is more than certain value, magnetism of material energy will be gradual
It reduces, after temperature is restored, remanent magnetism will not restore, and cause irreversible demagnetization.
For centrifugal pump as carrier, this sentences self priming centrifugal pump as sample.Self priming centrifugal pump abbreviation self priming pump, self-priming
The self-priming process of pump include gas-liquid mixing process, gas-liquid separation process and self-suction circulation liquid process recycling.In self priming pump certainly
It is a kind of two-phase flow structure of complexity, interior flow field especially 2 outlet jet liquid of impeller and return port phegma to be drawn through journey
The shear layer formed between body, speed up gas and liquid mixing and the formation and growth of cavity flow, and then accelerate the dissolving and discharge of gas.
Due to the liquid that draws used in self-priming process, often only nominal situation when half, therefore self priming pump is required when self-priming process
Starting torque is much smaller compared with when running well, this also with permanent magnet synchronous motor starting torque is smaller matches, it is same to reduce permanent magnetism
The starting load for walking motor prevents the generation of overload.Once pump body temperature is excessively high, mechanical seal can be impacted, it may
Cause to reveal, even results in motor bearings damage, be unfavorable for working normally.
The shaft of pump is generally connected directly with the shaft of motor so that the dynamic property of pump and the dynamic property of motor are mutual
Interference；In high speed rotation, dynamic and static balance fails to meet the requirements, cause with the component of fluid matasomatism by current conditions influenced compared with
Greatly；The complexity of fluid motion itself and a factor of restrictive pump dynamic property stability.The vibration generated is pumped to equipment
Itself is impacted, and shortens the service life.Secondly, the vibration of pump will also result in harmful effect when being transmitted to other equipment.Pump and motor
It is generated with the use of the noise that in the process, can also aggravate motor.The noise that motor generates is mainly derived from bearing, and motor is most absolutely
Number selects rolling bearing, specifically includes ball bearing and roller bearing.Rolling bearing has inner ring, outer ring, therebetween also ball/rolling
Column and retainer, in motor rotary course, these elements have relative motion, lead to irregular friction and collision and generate
Noise, it is especially particularly evident in the case where motor runs at high speed.
After servo-driver 23 experienced analog, mode mixture formula development, when having come into digital at present
Generation.Full digital servo-driver 23 not only overcomes the problems such as large dispersion of analog servomechanism, drift, low reliability, also
The flexible of the digital control advantage in control accuracy and control method has been given full play to, the not only structure letter of servo-driver 23 is made
It is single, and performance is more reliable.Servo-driver 23 mainly has servo control unit, power drive unit, communication interface list
Member composition, and connect matched permanent magnet synchronous motor and corresponding feedback detector part.
Shaft coupling 22 needs to ensure good balance and sensibility, plum coupling have it is larger axial, radial and
Angular compensatory ability, simple in structure, radial dimension is small, light-weight, and rotary inertia is small, is suitable for high speed occasion, so selecting
Plum coupling.
The occupation mode of noise transducer 10, temperature sensor and vibrating sensor is the prior art.Noise transducer
10, temperature sensor, the connection type of vibrating sensor and servo-driver 23, signal transfer function are the prior art.It watches
The circuit structure and automatically controlled application for taking 23 electric control permanent magnet synchronous motor of driver are the prior art.
Card sets retainingf key between rotor 15 and motor shaft 16, is arranged screens slot on the inner wall of rotor 15, motor shaft 16 it is outer
A part for recessed keyway on wall, retainingf key is embedded in keyway, is formed a fixed connection in another part insertion screens slot.Rotor 15
It is formed by keyway arrangements with motor shaft 16 and is reliably connected, to ensure to rotate synchronously together.
The both ends of motor shaft 16 are socketed with motor bearings, and motor bearings forms fixed peace by supporting rack and motor casing 13
Dress, is arranged V-shaped seal ring between motor bearings and electric motor end cap.By the rotational support of motor bearings, make motor shaft 16 that will turn
It goes out to power transmission.The sealing function of motor bearings end is effectively realized by V-shaped seal ring.
Fan 17 is installed on the tail end of motor shaft 16, the peripheral closure of fan 17 is equipped with case, case and 13 phase of motor casing
It is connected.Stator 14 and rotor 15 will produce a large amount of heat at work, and fan 17 is driven by motor shaft 16 and rotated synchronously, in electricity
When machine works, it can generate and distinguished and admirable radiate to motor as motor shaft 16 rotates.
Several radiating fins 18 are set on the outer wall of motor casing 13, and several radiating fins 18 are in arranged in parallel.Pass through shell
Several radiating fins 18 on outer wall further carry out the cooling effect to motor.
The side setting dredging mouth 9 of pump case 1, dredging mouth 9 are connected to tube chamber, dredging valve are arranged on dredging mouth 9.Due to self-priming
Pump often conveys solid-liquid two-phase flow medium, after a period of time that works, needs to open normally closed dredging mouth 9 and be cleared up.
As shown in Fig. 2, the regulation and control method of this centrifugal pump and magneto safe running control device, includes the following steps：
1) when, permanent magnet synchronous motor starts, the voltage formation that frequency converter exports lower frequency rotates slow stator 14
Magnetic field, with the increase of power angle, electromagnetic torque also accordingly increases and 15 inertia of rotor is overcome to make its rotation, and rotating speed is with change
The raising of frequency device frequency and gradually rise to a certain rotating speed, complete starting process；
2) it, is started by permanent magnet synchronous motor, synchronous driving motor axis 16 operates, and passes through the 22 synchronous drive pump housing of shaft coupling
Axis 3 rotates, and realizes the startup operation of centrifugal pump；
3), in centrifugal pump operational process, the flow of trandfer fluid and the component of fluid change at any time, required
Torque is changed at any time, and thus the output power of permanent magnet synchronous motor corresponds to demand and is changed；
4), motor critical temperature value is set in servo-driver 23 and motor dangerous temperature value, motor are warm in real time in advance
Angle value belongs to normal work no more than motor critical temperature value, and motor real-time temperature values are located at motor critical temperature value and motor danger
Belong to abnormal work between dangerous temperature value, motor real-time temperature values belong to dangerous work more than motor dangerous temperature value；Pass through
One temperature sensor 19 monitors the temperature on 13 surface of motor casing, and the first real time temperature signal is transferred to servo-driver 23, leads to
The temperature that second temperature sensor 20 monitors electric motor end cap is crossed, the second real time temperature signal is transferred to servo-driver 23,
If a, the first real-time temperature values and/or the second real-time temperature values show that permanent magnet synchronous motor is in abnormal work shape
State, servo-driver 23 export negative-feedback signal to single chip control unit, to adjust permanent magnet synchronous motor by frequency converter
Voltage reduces, power reduces, until the first real-time temperature values and the second real-time temperature values show that permanent magnet synchronous motor restores just
Normal working condition；
If b, the first real-time temperature values and/or the second real-time temperature values show that permanent magnet synchronous motor is in dangerous work shape
State, servo-driver 23 shut down single chip control unit outputting parking signal to regulate and control permanent magnet synchronous motor by frequency converter；
In real-world operation if when encountering harsh operating mode or accident, the heat dissipation effect of radiating fin 18 and fan 17 is difficult
To ensure the temperature of motor in safe range, it is necessary to regulate and control motor by servo-driver 23 to avoid damage.In magneto
The heatproof of permanent magnet is 130~140 degree or so, so general motor all shows 110~120 degree of maximum temperature, therefore according to not
Same motor model need to voluntarily specify two temperatures index.Critical temperature value is the acceptable comparative basis room temperature of rated moment highest
Wen Sheng；Dangerous temperature value is to damage the temperature of internal element.
5), motor threshold vibration value is set in servo-driver 23 and motor danger vibration values, motor shake in real time in advance
Dynamic value belongs to normal work no more than motor threshold vibration value, and the real-time vibration values of motor are located at motor threshold vibration value and motor danger
Belong to abnormal work between dangerous vibration values, the real-time vibration values of motor belong to dangerous work more than motor danger vibration values；Pass through electricity
Machine vibration sensor 21 monitors the Vibration Condition of electric motor end cap, and the real-time vibration signal of motor is transferred to servo-driver 23,
If a, the real-time vibration values of motor show that permanent magnet synchronous motor is in abnormal operation, servo-driver 23 is to monolithic
Machine control unit exports negative-feedback signal, and the voltage to adjust permanent magnet synchronous motor by frequency converter reduces, power reduces, until
The real-time vibration values of motor show that permanent magnet synchronous motor restores normal operating conditions；
If b, the real-time vibration values of motor show that permanent magnet synchronous motor is in dangerous work state, servo-driver 23 is to monolithic
Machine control unit outputting parking signal is shut down with regulating and controlling permanent magnet synchronous motor by frequency converter；
Usually in electric machine structure, rigid rotator 15 causes centrifugal force caused by static unbalance to generate size phase on engine base
Deng, the identical vibration of phase；The couple of the centrifugal force caused by unbalance dynamic generates equal in magnitude, opposite in phase on engine base
Vibration.Also add-on parts vibrate etc. as caused by fan 17, and such vibration causes harmful effect to motor normal operation.
6), setting pumps critical temperature value and pump dangerous temperature value in servo-driver 23 in advance, and pump real-time temperature values are not
Belong to normal work more than pump critical temperature value, pump real-time temperature values are located between pump critical temperature value and pump dangerous temperature value and belong to
In abnormal work, pump real-time temperature values are more than that pump dangerous temperature value belongs to dangerous work；It is monitored by pump body temperature sensor 11
Pump real time temperature signal is transferred to servo-driver 23 by the temperature for pumping end cap 5,
If a, pump real-time temperature values show that centrifugal pump is in abnormal operation, servo-driver 23 controls microcontroller single
Member output negative-feedback signal, to adjust the voltage reduction of permanent magnet synchronous motor by frequency converter, power reduces, until pump is warm in real time
Angle value shows that centrifugal pump restores normal operating conditions；
If b, pump real-time temperature values show that centrifugal pump is in dangerous work state, servo-driver 23 controls microcontroller single
First outputting parking signal is shut down with regulating and controlling permanent magnet synchronous motor by frequency converter；
7), setting pumps threshold vibration value and the dangerous vibration values of pump in servo-driver 23 in advance, pumps real-time vibration values not
Belong to normal work more than pump threshold vibration value, pumps real-time vibration values and belong between pump threshold vibration value and the dangerous vibration values of pump
In abnormal work, it is more than that the dangerous vibration values of pump belong to dangerous work to pump real-time vibration values；It is monitored by pump housing vibrating sensor 12
The Vibration Condition for pumping end cap 5, will pump real-time vibration signal and is transferred to servo-driver 23,
If a, pumping real-time vibration values shows that centrifugal pump is in abnormal operation, servo-driver 23 controls microcontroller single
Member output negative-feedback signal, the voltage to adjust permanent magnet synchronous motor by frequency converter reduces, power reduces, until pump shakes in real time
Dynamic value shows that centrifugal pump restores normal operating conditions；
If b, pumping real-time vibration values shows that centrifugal pump is in dangerous work state, servo-driver 23 controls microcontroller single
First outputting parking signal is shut down with regulating and controlling permanent magnet synchronous motor by frequency converter；
7), setting pumps critical noise value and pump hazardous noise value in servo-driver 23 in advance, and pump real-time noise value is not
Belong to normal work more than pump critical noise value, pump real-time noise value is located between pump critical noise value and pump hazardous noise value and belongs to
In abnormal work, pump real-time noise value is more than that pump hazardous noise value belongs to dangerous work；Pump case 1 is monitored by noise transducer 10
Pump noise signal in real time is transferred to servo-driver 23 by the noise decibel of water outlet 1b,
If a, pump real-time noise value shows that centrifugal pump is in abnormal operation, servo-driver 23 controls microcontroller single
Member output negative-feedback signal, the voltage to adjust permanent magnet synchronous motor by frequency converter reduces, power reduces, until pump is made an uproar in real time
Sound value shows that centrifugal pump restores normal operating conditions；
If b, pump real-time noise value shows that centrifugal pump is in dangerous work state, servo-driver 23 controls microcontroller single
First outputting parking signal is shut down with regulating and controlling permanent magnet synchronous motor by frequency converter.
About the setting of every temperature value, vibration values and noise figure, parameter area is equipped with according to specific motor model
Model of pump and specific operating mode setting, be not specifically addressed herein.
When self-priming pump work, since operating mode often changes, if maintaining constant shaft power always, it is difficult to make self priming pump
It is chronically at Effec-tive Function.Therefore, it is necessary to the adjusting of power input to machine is carried out according to real-time working condition.Permanent magnet synchronous motor uses
Be permanent magnet excitation, magnetic field can be considered as constant；Motor speed is exactly synchronous rotational speed simultaneously, i.e. its slip is zero.
These conditions so that the complexity of mathematical model of the servo-driver 23 when driving permanent magnet synchronous motor is greatly dropped
It is low.
In step 1), permanent magnet synchronous motor starts, and when stator 14 is passed through three-phase alternating current, three-phase current is in stator winding
Resistance on generate voltage drop, by three-phase alternating current generate rotating armature magnetomotive force and foundation armature field, pass through cutting
Stator winding generates induced electromotive force, and then is rotated with synchronous rotational speed with electromagnetic force dragging rotor 15.
In step 2), before being initiated, there be not the remaining of axis excessively in the impeller channel of centrifugal pump and draw liquid, startup
When, impeller 2 is rotated in company with pump housing axis 3, will be drawn liquid and is imported together in spiral case 6 with impeller channel and the intraluminal air of sucking, then
Into in gas-liquid separation chamber 7, subsequent gas phase is escaped along water outlet 1b, and liquid phase, which is affected by gravity, flows into return passage 8, further passes through
Return port flows back in impeller channel.
Self priming pump is frequently shut down according to working environment needs, is switched on, and the amount and state labile of pumped (conveying) medium, warp
It can often change.For this purpose, self priming pump by flow back and draw the design of liquid avoid other centrifugal pumps before booting institute it is necessary
Filling pump operation.Self priming pump from pumping phases, since the fluid of its acting is less, required shaft power is relatively low, so permanent magnetism
The smaller disadvantage of torque can be ignored synchronous motor on startup.
Feedback information is reached current controller by servo-driver 23, obtains three-phase voltage command, and control chip passes through three
Phase voltage directive obtains instruction electric wave output to power device, control permanent magnet synchronous motor operation after reversed, delay.
This centrifugal pump and magneto safe running control device, by analog simulation, in the suitable operating mode of two equipment
Point is equipped with corresponding sensor, monitors required state parameter in real time, is tested and assessed by temperature, vibration and noise various aspects, will be real
When parameter be transferred to control system, and analyze assessment its there may be the problem of, feed back to corresponding control element, play in advance
Preventive effect, to ensure the safe and reliable operation of pump and motor；And realize and accurately control, achieve the effect that energy-efficient.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Although pump case 1 is used more herein；Water inlet 1a；Water outlet 1b；Impeller 2；Pump housing axis 3；Pump bearing 4；Pump
End cap 5；Spiral case 6；Gas-liquid separation chamber 7；Return passage 8；Dredging mouth 9；Noise transducer 10；Pump body temperature sensor 11；The pump housing shakes
Dynamic sensor 12；Motor casing 13；Stator 14；Rotor 15；Motor shaft 16；Fan 17；Radiating fin 18；First temperature sensor
19；Second temperature sensor 20；Motor oscillating sensor 21；Shaft coupling 22；The terms such as servo-driver 23, but be not precluded and make
With the possibility of other terms.The use of these terms is merely for the convenience of describing and explaining the nature of the invention；
It is contrary to the spirit of the present invention to interpret them as any one of the additional limitations.
Claims (6)
1. centrifugal pump and magneto safe running control device, including centrifugal pump, permanent magnet synchronous motor and servo-driver,
It is characterized in that, the centrifugal pump includes pump case, has pump chamber in the pump case, impeller is arranged in the pump chamber, the impeller
Pump housing axis is worn at center admittedly, stretches out the pump case after the driving end socket pump bearing and pump end cap of the pump housing axis, on the pump case
Inlet and outlet are opened up, the water inlet is connected to the impeller channel of the pump chamber, the impeller channel connection by tube chamber
One spiral case, the spiral case are connected to a gas-liquid separation chamber, and the top of the gas-liquid separation chamber is connected to above-mentioned water outlet, the gas-liquid point
Bottom from room is connected to return passage, and the return passage is connected to the impeller channel by return port, and the water outlet setting is made an uproar
Pump body temperature sensor is arranged in the side of sonic transducer, the pump end cap, and pump housing vibrating sensor, institute is arranged on the pump end cap
State the signal output of the signal output end of noise transducer, the signal output end of pump body temperature sensor and pump housing vibrating sensor
End connects the servo-driver by electric wire；The permanent magnet synchronous motor includes motor casing, and setting is fixed in the motor casing
Son and rotor, the center of the rotor are installed with motor shaft admittedly, and the driving end cap of the motor shaft connects motor bearings and electric motor end cap
After stretch out the motor casing, the first temperature sensor is set on the outer wall of the motor casing, the side setting of the electric motor end cap
Motor oscillating sensor, the signal output of first temperature sensor are arranged on the electric motor end cap for second temperature sensor
End, the signal output end of second temperature sensor and motor oscillating sensor signal output end by electric wire connect described in watch
Take driver；It is connected by shaft coupling between driving end and the driving end of pump housing axis of the motor shaft, the servo-driver
The permanent magnet synchronous motor is electricly connected by frequency converter.
2. centrifugal pump according to claim 1 and magneto safe running control device, which is characterized in that the rotor
Card sets retainingf key between motor shaft, is arranged screens slot on the inner wall of the rotor, recessed keyway on the outer wall of the motor shaft,
In the embedded keyway of a part of the retainingf key, form a fixed connection in another part insertion screens slot.
3. centrifugal pump according to claim 1 and magneto safe running control device, which is characterized in that the motor
The both ends of axis are socketed with above-mentioned motor bearings, and the motor bearings is formed by supporting rack and the motor casing and is fixedly mounted,
V-shaped seal ring is set between the motor bearings and electric motor end cap.
4. centrifugal pump according to claim 1 and magneto safe running control device, which is characterized in that the motor
Fan is installed on the tail end of axis, the peripheral closure of the fan is equipped with case, and the case is fixedly connected with the motor casing.
5. centrifugal pump according to claim 1 and magneto safe running control device, which is characterized in that the motor
Several radiating fins are set on the outer wall of shell, and several radiating fins are in arranged in parallel.
6. centrifugal pump according to claim 1 and magneto safe running control device, which is characterized in that the pump case
Side dredging mouth is set, the dredging mouth is connected to the tube chamber, dredging valve is arranged on the dredging mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820500140.9U CN208057425U (en) | 2018-04-10 | 2018-04-10 | Centrifugal pump and magneto safe running control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820500140.9U CN208057425U (en) | 2018-04-10 | 2018-04-10 | Centrifugal pump and magneto safe running control device |
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| CN208057425U true CN208057425U (en) | 2018-11-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488075A (en) * | 2018-04-10 | 2018-09-04 | 浙江永发机电有限公司 | Centrifugal pump and magneto safe running control device and its regulation and control method |
| CN111720333A (en) * | 2020-06-02 | 2020-09-29 | 江苏罗地亚泵业有限公司 | Self-priming pump with high self-priming speed |
-
2018
- 2018-04-10 CN CN201820500140.9U patent/CN208057425U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488075A (en) * | 2018-04-10 | 2018-09-04 | 浙江永发机电有限公司 | Centrifugal pump and magneto safe running control device and its regulation and control method |
| CN108488075B (en) * | 2018-04-10 | 2024-02-20 | 浙江永发机电有限公司 | Centrifugal pump and permanent magnet motor safe operation control device and regulation and control method thereof |
| CN111720333A (en) * | 2020-06-02 | 2020-09-29 | 江苏罗地亚泵业有限公司 | Self-priming pump with high self-priming speed |
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