KR101968312B1 - A Burn-out prevention device of pump motor - Google Patents

Abstract

The present invention relates to a burn-out prevention device of a motor for a pump, which is for preventing burn-out caused by contact between a rotor and a stator of a motor for driving a pump. According to an embodiment of the present invention, the burn-out prevention device of a motor for a pump is provided in a motor for a pump for driving an impeller so as to prevent burn-out due to mutual contact between a rotor and a stator which generates electromagnetic force by being wound by a coil so as to rotate the rotor by the electromagnetic force. The device comprises: a current supply unit supplying a current to the rotor; a current measuring unit measuring a current supplied from the current supply unit and flowing to the rotor; a contact determination unit comparing a current value measured by the current measuring unit with a value of the current provided from the current supply unit to the rotor so as to determine contact between the rotor and the stator; and a power cutoff unit cutting off the power supply of the motor for the pump when the contact determination unit determines that the rotor and the stator are in contact with each other. Therefore, burn-out of the motor for the pump can be prevented.

Description

[0001] The present invention relates to a burn-out prevention device for a pump motor,

The present invention relates to a burn-out preventing device for a motor for a pump for preventing burn-out caused by abutment between a rotor and a stator of a motor for driving a pump.

Generally, a pump is a device for sucking a fluid and forcibly discharging the fluid. The pump rotates the impeller which sucks and discharges the fluid by a motor to generate a suction force or a toe output.

On the other hand, when the rotor of the pump is rotated while being contacted with the stator due to abrasion of the bearing or expansion due to heat because the motor is enclosed by a motor casing in order to prevent foreign matter from entering the motor, .

In order to solve this problem, a "submersible pump" of the Korean Utility Model Registration No. 20-0481905 (published on Nov. 25, 2016) has been disclosed.

In the conventional underwater pump, a motor housing in which an electric motor is incorporated and a pump housing in which an impeller is incorporated are coupled in a watertight manner, an impeller is mounted on a front end of a drive shaft of the electric motor, a drive shaft of the electric motor is supported by bearings, An endoscope camera disposed in the interior of the bearing housing is mounted on a support bracket mounted on an upper cap of the bearing housing, a microphone is coupled to the endoscope camera, noise data of the endoscope camera and noise data of the microphone are transmitted to the monitoring unit, The alarm device is activated by the monitoring part and the operation of the electric motor is stopped when the leakage or the bearing is judged to be damaged. A collar check plate is attached to the upper cap of the bearing housing, The water was configured to determine whether a leak color read from the image of the video data by being noticeable color.

Such a conventional submersible pump can confirm the state of the bearing by the endoscope and the noise data, thereby preventing burnout of the electric motor generated by the rotor abutting against the stator.

However, since the conventional submersible pump is hermetically sealed, it is difficult to photograph the inside of the pump, and it is difficult to check the contact state between the rotor and the stator of the pump by only the captured image and sound. There was a troublesome problem.

SUMMARY OF THE INVENTION The present invention has been devised to solve the above-mentioned problems, and it is an object of the present invention to provide a motor for a pump capable of preventing burnout caused by abutment of a stator and a rotor of a pump- The present invention provides an apparatus for preventing the burnout of a motor for a pump, which can prevent the operation of the pump motor when a contact occurs, and can prevent the occurrence of burnout in advance by measuring the distance between the rotor and the stator.

According to an aspect of the present invention, there is provided a burn-in prevention device for a motor for a pump, the burn-in prevention device for a motor for a pump being provided in a motor for a pump for driving an impeller, the coils being wound so as to rotate the rotor and the rotor by an electromagnetic force A burn-in prevention device for a motor for a pump for preventing burn-out by mutual contact of a stator generating an electromagnetic force, comprising: a current supply part for supplying a current to the rotor; A contact determination unit for comparing a current value measured by the current measurement unit with a current value provided to the rotor in the current supply unit to determine contact between the rotor and the stator, When it is determined that the rotor and the stator are in contact with each other, a power cutoff unit that cuts off power supply to the pump motor It should.

The current supply unit may include a self-power generating unit that self-generates by the rotation of the rotor and supplies a current to the rotor.

The self-power generation unit includes a guide plate installed along the inner circumference of the stator, a traveling roller installed on the rotor so as to contact the guide plate and running on the guide plate in accordance with rotation of the rotor, And a self-generator that rotates the generator shaft by rotation of the roller and supplies a self-generated current to the rotor.

The self-power generation unit may include a support link rotatably coupling the driving roller at a predetermined angle in the rotor, a rotation angle of the support link installed at the support link, and measuring a distance between the stator and the rotor And an interval determination unit for controlling the power cutoff unit to cut off the power of the power cutoff unit when the rotation angle of the support link measured by the rotation detection sensor is out of a preset angle range .

And an interval measuring sensor installed in the rotor and measuring an interval between the rotors with respect to the guide plate to measure an interval between the stator and the rotor.

According to the present invention, current is supplied to the rotor, contact between the rotor and the stator is determined according to the change of the supplied current, so that occurrence of contact can be accurately determined to prevent burnout of the pump motor. The power cutoff unit automatically cuts off the power supplied to the motor for the pump to eliminate the inconvenience of continuously monitoring the state of the rotor and the stator.

In addition, the interval between the rotor and the stator is measured in accordance with the rotation of the support link, and measures can be taken in advance according to the change in the interval, thereby preventing burnout of the pump motor.

1 is a side cross-sectional view showing a pump provided with a burn-out prevention device for a motor for a pump according to an embodiment of the present invention.
FIG. 2 is a side cross-sectional view illustrating an electric motor provided with a burn-out prevention device for a motor for a pump according to an embodiment of the present invention.
3 is a schematic block diagram of a burn-out prevention apparatus for a motor for a pump according to an embodiment of the present invention.
Fig. 4 is an enlarged view of "A" in Fig. 2, and is a side view schematically showing a current supply unit.
FIG. 5 is a plan view of a part of a burn-out prevention device for a motor for a pump according to an embodiment of the present invention, showing the operating state of the support link.
FIG. 6 is a partial plan view of a burn-out prevention apparatus for a motor for a pump according to an embodiment of the present invention. FIG. 6 is a state view of the support link in a state where the rotor is eccentric and the interval between the stator is reduced.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 and 2, a motor for a pump provided with a burn-out prevention apparatus 100 for a motor for a pump according to an embodiment of the present invention includes a rotor 110 in which a rotating shaft 111 is installed at the center, The rotor 110 is formed by laminating a plurality of ring-shaped core flat bars 115 on the rotating core 113 and winding the core bar 117 across the plurality of core flat bars 115 around the core flat bars 115 A plurality of such units may be installed.

The stator 120 is also provided with a plurality of stator treads 121 formed at the center thereof so that the rotor 110 can be inserted thereinto and a stator bar 123 is provided across the stacked stator treads 121, The stator bar 123 may be configured so that the stator coil is wound to generate an electromagnetic force so that the rotor 110 is rotated by the electromagnetic force.

3 to 5, the burn-out prevention apparatus 100 of the motor for a pump according to the embodiment of the present invention may include a current supply unit 130. [

The current supply unit 130 can supply current to the rotor 110 so that current flows.

The current supplying unit 130 may generate electricity by the rotation of the rotor 110 to supply current to the rotor 110. The current supplying unit 130 may supply current to one of the plurality of core bars 117, The current can be supplied to the bar 117 or the core flat 115. [

The current supply unit 130 may include a self-generating unit.

The self-generating unit can generate electricity provided to the rotor (110) by rotation of the rotor (110).

The self-power generation unit may be located around the rotor 110. The self-power generation unit may be configured such that the self-power generation unit is rotated by the self- It is possible to generate electricity by rotating the power generation shaft of the generator 132.

The self-generating unit may include a ballast to supply a uniform current from the electricity generated by the self-generator 132 to the rotor 110.

On the other hand, the self-generating unit may include a support link 135.

A driving roller 131 is rotatably coupled to an end of the supporting link 135 so that the driving roller 131 is rotated by the rotation of the supporting link 135, May be positioned proximate or away from the rotor 110. [

At this time, the power of the traveling roller 131 separated from the self-generator 132 by the support link 135 can be transmitted to the self-generator 132 by the belt 134 or through a plurality of gears.

The support link 135 can be supported by a link spring 133 that generates an elastic force in a direction in which the travel roller 131 moves away from the self power generation unit.

In the self-power generation unit, a rotation sensor 137 is installed on the rotation shaft 111 on which the support link 135 rotates to sense the rotation of the support link 135.

The traveling roller 131 rotates while being supported by a guide plate 160 which will be described later when the rotor 110 rotates. The traveling roller 131 rotates as the distance between the rotor 110 and the stator 120 becomes closer to the traveling roller 131 are pressed against the guide plate 160, the support link 135 can be rotated.

5 and 6, the distance between the rotor 110 and the stator 120 can be measured in such a manner that the rotation sensing sensor 137 senses the rotation of the support link 135.

On the other hand, the rotation detecting sensor 137 measures the rotation angle of the support link 135 in real time and provides the rotation angle information of the support link 135 to the gap determining unit (not shown). In the gap determining unit, It is determined that the interval between the rotator 110 and the stator 120 is normal when the rotation angle information provided by the rotation angle detector 137 is within a predetermined angle range, And the stator 120 can be transmitted at a distance equal to or greater than the interval.

For example, when the predetermined angle range is 0 to 1 degrees and the rotation angle of the support link 135 is out of the angular range exceeding 1 degree, the rotor 110 rotates in the stator 120 in the eccentric There is a possibility of occurrence of burn-out, so that the interval determination unit can transmit an abnormal-interval signal.

In the meantime, when the interval determination unit outputs a signal of a distance equal to or greater than the interval, the power cutoff unit 150, which will be described later, cuts off the power source and cuts off the power supplied to the pump prime mover before the burnout occurs, It is possible to prevent burning of the pump 200, which may occur due to abutment between the stator 110 and the stator 120.

Here, the interval determination unit may be implemented by software embedded in an electric circuit or an embedded chip.

In the meantime, the self-power generation unit is provided with an interval measuring sensor for directly measuring the interval, instead of the rotation detecting sensor 137, to measure the interval distance from the guide plate 160 when the rotor 110 rotates 110 and the stator 120. If the measured gap distance is determined by the gap determination unit and the measured gap distance is out of the predetermined gap distance range, the gap error signal is generated and provided to the power shutoff unit 150 .

3 and 4, the burn-out prevention apparatus 100 of the motor for a pump according to the embodiment of the present invention may include a current measuring unit 141. [

The current measuring unit 141 can measure the current flowing through the rotor 110.

The current measuring unit 141 may measure the current flowing through the rotor 110 by being positioned in a direction opposite to the current supplying unit 130 in the rotor 110.

The current measuring unit 141 may provide the measured current value to the contact determining unit 143, which will be described later.

3 and 4, the burn-out prevention apparatus 100 of the motor for a pump according to the embodiment of the present invention may include a contact determination unit 143. [

The contact determination unit 143 compares the current value measured by the current measurement unit 141 with the current value provided to the rotor 110 in the current supply unit 130 so that the rotor 110 rotates to the stator 120 It can be judged that the contact has been made.

For example, since the rotor 110 and the stator 120 are both made of a conductor, when the rotor 110 contacts the stator 120, the current of the rotor 110 flows to the stator 120, Can be reduced.

The contact determination unit 143 compares the current value supplied from the current supply unit 130 to the rotor 110 and the current value measured by the current measurement unit 141 and measures the current value measured by the current measurement unit 141 It can be determined that the rotor 110 is in contact with the stator 120 when the current value is smaller than the current value provided by the current supply unit 130. [

If it is determined that the rotor 110 is in contact with the stator 120, the contact determination unit 143 may provide the connection signal information to the power cut-off unit 150 to be described later.

The contact determination unit 143 may include a wireless communication unit 145 for wirelessly communicating the connection signal information determined to be contacted to the power cutoff unit 150.

Meanwhile, the current supply unit 130, the current measurement unit 141, and the contact determination unit 143 may be implemented by an electric circuit, or may be implemented by an embedded chip or software.

3, the burn-out prevention apparatus 100 of the motor for a pump according to the embodiment of the present invention may include a power cut-off unit 150. [

When the contact determination unit 143 receives connection signal information indicating that the rotor 110 is in contact with the stator 120, the power interruption unit 150 stops power supply to the pump motor Lt; / RTI >

The power cut-off unit 150 may be configured to cut off the power supplied to the pump electric motor, which is installed in the control panel for controlling the pump electric motor. The power cut-off unit 150 may supply electric power , Or an electronic switch that cuts off the supply.

The power cutoff unit 150 may include a communication module that receives connection signal information wirelessly transmitted from the contact determination unit 143. In an exemplary embodiment, the power cutoff unit 150 is installed in the control panel However, the power cut-off unit 150 may be installed in a junction box in which power lines are connected to supply a signal cable or a power source for controlling the pump motor.

The power cut-off unit 150 and the contact determination unit 143 can communicate with each other according to a well-known wireless communication standard such as Bluetooth, ZigBee, or WiFi.

3 and 4, the burn-out prevention apparatus 100 for a motor for a pump according to the embodiment of the present invention may include a guide plate 160. As shown in FIG.

The guide plate 160 may be installed at the upper end of the stator 120 along the inner periphery of the stator 120 so that the traveling roller 131 installed on the rotor 110 runs and rotates.

A minute groove may be formed in the guide plate 160 to allow the traveling roller 131 to rotate easily during the rotation of the rotor 110. A current flowing in the rotor 110 is transmitted to the stator 120 Either one or both of the guide plate 160 and the driving roller 131 may be formed of a non-conductive material so as not to be transmitted.

5, the burn-out prevention apparatus 100 of the motor for a pump according to the embodiment of the present invention may include a cleaning brush 139. [

The cleaning brush 139 is located in front of the traveling roller 131 in a direction in which the rotor 110 rotates, and can clean the guide plate 160.

On the other hand, the cleaning brush 139 is used for cleaning the guide plate 160 in advance to prevent an operation error due to rotation of the support link 135 provided with the travel roller 131 by the foreign matter adhering to the guide plate 160 .

For example, when foreign substances are adhered to the guide plate 160, the support link 135 rotates as the travel roller 131 passes the foreign matter, and the rotation sensor 135 detects the rotation of the support link 135, When the determination unit determines that the rotor 110 is positioned close to the stator 120, it is possible to prevent the occurrence of an operation error that the power interruption unit 150 blocks the supply of power.

The operation and effects of the above-described respective structures will be described.

The impeller 210 coupled to the rotating shaft 111 of the rotor 110 rotates to rotate the casing 230 in a direction in which the impeller 210 rotates, And sucks the fluid through the suction port and discharges the sucked fluid to the discharge port of the casing (230).

On the other hand, when the rotor 110 rotates, the current supply unit 130 generates electricity and supplies the generated electricity to the rotor 110.

At this time, the current supplying unit 130 rotates along the inner circumference of the guide plate 160 installed on the upper end of the inner circumference of the stator 120, and the traveling roller 131 of the self- 131) drives the self-generator (132) by the rotating power to produce electricity in the self-generator (132).

The electricity generated by the self-generator 132 is changed to a predetermined current value in the current supply unit 130, and is converted into a constant current through the ballast and supplied to the rotor 110.

The current supplied to the rotor 110 is measured by the current measuring unit 141 and the current measured by the current measuring unit 141 is supplied to the contact determiner 143.

The contact determination unit 143 compares the current value provided by the current supply unit 130 with the current value measured by the current measurement unit 141 and outputs the current value measured by the current measurement unit 141 to the current supply unit 130 and the preset range, it is determined that the rotor 110 is in contact with the stator 120. In this case,

A signal that the contact determiner 143 determines that the rotor 110 and the stator 120 are in contact with each other is provided to the power cut-off unit 150. In response to the signal generated by the power cutoff unit 150, The power supply to the stator 120 is interrupted to prevent the destruction due to the contact between the rotor 110 and the stator 120.

On the other hand, when the portion of the rotor 110 close to the stator 120 is generated, the driving roller 131 is pressed at this portion, the supporting link 135 is rotated, and the rotated angle of the supporting link 135 is The rotation detection sensor 137 measures and provides the distance to the interval determination unit.

When the rotation angle of the support link 135 is out of the preset rotation angle range, the gap determination unit determines that the rotor 110 is eccentrically positioned in the stator 120, And provides it to the blocking unit 150.

The power cut-off unit 150 cuts off the power supplied to the pump electric motor so that the operation of the pump electric motor is stopped.

Therefore, the burn-out prevention apparatus 100 for a motor for a pump according to the embodiment of the present invention grasps the contact between the rotor 110 and the stator 120 as a current value is changed by supplying a current to the rotor 110 It is possible to prevent the occurrence of burning due to the contact, and the consumption of electricity can be minimized as the self-generating unit is installed to produce electricity itself.

The spacing between the rotor 110 and the stator 120 is measured according to the rotation angle of the support link 135 so that the rotor 110 and the stator 120 are pre- It is possible to prevent the occurrence of burnout.

In addition, the scope of the present invention is not limited to the embodiments, but may be modified and changed by those skilled in the art from the embodiments of the present invention. .

100: burn-out prevention device of a motor for a pump 110: rotor
111: rotating shaft 113: rotating core
115: core flat iron 117: core bar
120: stator 121: stator flat plate
123: stator bar 130: current supply part
131: traveling roller 132: self-generator
133: Link spring 135: Support link
137: rotation detection sensor 139: brush
141: current measuring unit 143: contact determination unit
145: wireless communication unit 150:
160: guide plate 200: pump
210: impeller 230: casing

Claims (5)

A burn-in prevention device for a motor for a pump for preventing burn-out caused by mutual contact between a rotor and a stator for generating an electromagnetic force by winding a coil so as to rotate the rotor by an electromagnetic force, for driving the impeller In this case,
A current supplying unit for supplying current to the rotor,
A current measuring unit supplied from the current supplying unit and measuring a current flowing in the rotor,
A contact determination unit for comparing a current value measured by the current measurement unit with a current value provided to the rotor in the current supply unit to determine contact between the rotor and the stator,
And a power cutoff unit for cutting off the power supply to the pump motor when the contact determination unit determines that the rotor and the stator are in contact with each other. The method according to claim 1,
The current supply unit
And a self-generating unit that generates electric power by the rotation of the rotor and supplies a current to the rotor. 3. The method of claim 2,
The self-
A guide plate installed along the inner circumference of the stator,
A traveling roller which is installed on the rotor so as to be in contact with the guide plate and rotates while rotating the guide plate in accordance with rotation of the rotor,
And a self-generator for rotating the power generating shaft by rotation of the driving roller to supply a self-generated current to the rotor. The method of claim 3,
The self-
A supporting link rotatably coupling the traveling roller at a predetermined angle in the rotor,
A rotation sensor installed on the support link for measuring a rotation angle of the support link and measuring an interval between the stator and the rotor,
And an interval determining unit for controlling the power cutoff unit so that the power cutoff unit cuts off the power when the rotation angle of the support link measured by the rotation detection sensor is out of a predetermined angle range. Prevention device. The method of claim 3,
And an interval measuring sensor installed at the rotor and measuring an interval between the rotors with respect to the guide plate to measure an interval between the stator and the rotor.

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