CN115561629B - Portable motor no-load test device - Google Patents
Portable motor no-load test device Download PDFInfo
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- CN115561629B CN115561629B CN202211128231.1A CN202211128231A CN115561629B CN 115561629 B CN115561629 B CN 115561629B CN 202211128231 A CN202211128231 A CN 202211128231A CN 115561629 B CN115561629 B CN 115561629B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The application discloses a portable motor no-load test device, which comprises: the soft starter comprises an input end, an output end, a first control end and a second control end; the input end is electrically connected with a three-phase power supply; the output end is electrically connected with the input end of the motor to be tested, and the first control end is electrically connected with a first switch; the soft starter is used for starting when the first switch is closed so as to start the motor to be tested; the control circuit comprises a start switch, a stop switch and a first electromagnet coil which are sequentially connected in series; the control circuit is used for conducting when the starting switch is closed, and controlling the first switch to be closed based on the first electromagnet coil; the detection end of the vibration sensor is connected with the motor to be detected; the output end is electrically connected with the processor; the vibration signal of the motor is detected after the motor is started, the vibration signal is output to the processor, and the processor is used for processing the vibration signal to obtain vibration parameters. The device can conveniently and rapidly carry out no-load test on the motor to be tested.
Description
Technical Field
The application relates to the technical field of no-load detection of motors, in particular to a portable no-load test device for a motor.
Background
At present, the number of motors of a domestic nuclear power plant takes a million kilowatt-level unit of a certain model as an example, so that as many as 3400 motors (pumps, fans and the like) run safely and reliably, and important matters such as nuclear safety, power generation efficiency and the like are related, and regular maintenance is required for both in-service equipment and stored strategic equipment and spare parts. The motor is required to be subjected to no-load test after daily disassembly and motor replacement, and the purpose is to confirm the steering direction of the motor, measure the bearing temperature, the body temperature, the running current, the presence or absence of abnormal sounds and the like of the motor, so that the qualification rate of motor maintenance is judged, and irreversible damage to load equipment caused by unqualified connection load equipment during function re-authentication is avoided.
The traditional motor no-load test mode is direct start and needs to transport the motor to the vicinity of the overhaul power supply with proper capacity, and the temporary cable is connected to carry out no-load test, so that the motor needs to be reworked and hoisted, manpower and material resources are wasted, safety accidents easily occur in the process to cause damage to equipment, and the electric energy loss of the direct start motor is large. For in-service equipment, a prime power cable is generally used for carrying out an idle test, but most of motors in a nuclear power plant are started and stopped in association with the control logic protection of a DCS system in a main control room, the motor idle test needs to be operated and executed in the DCS system in a process of 'temporary control change-TCA', professional personnel are required to execute the process, the safety risk of the system is high in executing the change, and meanwhile, special implementation schemes are required to be compiled, and leaders at all levels are required to examine and approve the change process.
Therefore, a portable motor no-load test device is needed to solve the problems that in the prior art, no-load tests of motors are not convenient enough and the test time is long.
Disclosure of Invention
In view of the above, the application provides a portable motor no-load test device, which mainly aims to solve the problems that the existing motor no-load test is not convenient enough and the test consumes long time.
In order to solve the above problems, the present application provides a portable motor no-load test apparatus, comprising:
the soft starter comprises an input end, an output end, a first control end and a second control end; the input end is electrically connected with a three-phase power supply; the output end is electrically connected with the input end of the motor to be tested, and the first control end is electrically connected with a first switch; the soft starter is used for starting when the first switch is closed so as to start the motor to be tested;
the control circuit comprises a start switch, a stop switch and a first electromagnet coil which are sequentially connected in series; the control circuit is used for being conducted when the starting switch is closed, and the first switch is controlled to be closed based on the first electromagnet coil;
the detection end of the vibration sensor is connected with the motor to be detected; the output end is electrically connected with the processor; and the vibration signal of the motor is detected after the motor is started, and the vibration signal is output to the processor, so that the processor is used for processing the vibration signal to obtain vibration parameters.
Optionally, the soft starter further comprises a second control end;
the second control end is connected with a bypass protection electromagnetic coil in series; the bypass protection electromagnetic coil is used for being conducted after the soft starter is started;
the control circuit is also connected with a thermal relay switch in series;
the input end and the output end of the soft starter are connected in parallel with an overcurrent protection circuit; the overcurrent protection circuit comprises bypass thermal relay coils and a first bypass contact switch which are sequentially connected in series; the first bypass contact switch is used for being closed when the bypass protection coil is conducted so as to conduct the overcurrent protection circuit; the thermal relay coil is used for short-circuiting when the motor to be detected is overloaded, and controlling a thermal relay switch in the control circuit to be disconnected, so that the control circuit is disconnected, and the three asynchronous motors are turned off in a soft mode.
Optionally, a normally closed emergency stop switch is connected in series between the control circuit and the power supply.
Optionally, a miniature circuit breaker is also connected in series between the control circuit and the power supply.
Optionally, a switch is connected in parallel between the control circuit and the power supply to isolate the power supply.
Optionally, a fuse is connected in series between the control circuit and the power supply.
Optionally, the second control end of the soft starter is also electrically connected with a fault indication circuit; the fault indication circuit comprises a second electromagnet coil and a fault indication lamp connected with the second electromagnet coil in parallel.
Optionally, the portable motor no-load test device further comprises an operation indicating circuit; the operation indicating circuit comprises an operation indicating lamp and a second bypass contact switch connected with the operation indicating lamp in series; the second bypass contact switch is used for being closed when the bypass protection coil is conducted, and the operation indication circuit is conducted so that the operation indication lamp is lightened.
Optionally, the portable motor no-load test device further comprises a stop indication circuit, wherein the stop indication circuit comprises a stop indicator lamp and a second switch connected in series with the stop indicator lamp; the second switch is used for being disconnected when the first electromagnet coil is connected so as to enable the stop indicator lamp to be extinguished; the first electromagnet coil is closed when being opened so that the stop indicator light is lighted.
Optionally, the portable motor no-load test device further comprises a temperature acquisition sensor, and an inspection end of the temperature sensor is connected with the motor to be tested and used for detecting the temperature of the motor to be tested.
According to the portable motor no-load test device, when the motor to be tested needs to be subjected to no-load test, the motor to be tested is only connected with the soft starter of the portable motor no-load test device, and the motor to be tested is connected with the detection end of the vibration sensor, so that the starting of the motor to be tested and the detection of vibration parameters can be realized, no-load test of the motor to be tested is realized, the test time is shortened greatly, the motor does not need to be reworked or hoisted, and manpower and material resources are saved.
When the detected valve is required to be detected and whether the valve performance meets the requirement is determined, the detected valve can be connected with the valve detection device, so that the device is utilized to automatically detect the valve performance, the detection is not required to be performed manually according to experience, the detection efficiency is improved, and the detection result is more accurate.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is an overall schematic diagram of a portable motor no-load test apparatus according to an embodiment of the present application;
fig. 2 is a schematic circuit diagram of a portable motor no-load test apparatus according to an embodiment of the present application.
Detailed Description
Various aspects and features of the present application are described herein with reference to the accompanying drawings.
It should be understood that various modifications may be made to the embodiments of the application herein. Therefore, the above description should not be taken as limiting, but merely as exemplification of the embodiments. Other modifications within the scope and spirit of the application will occur to persons of ordinary skill in the art.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with a general description of the application given above, and the detailed description of the embodiments given below, serve to explain the principles of the application.
These and other characteristics of the application will become apparent from the following description of a preferred form of embodiment, given as a non-limiting example, with reference to the accompanying drawings.
It is also to be understood that, although the application has been described with reference to some specific examples, those skilled in the art can certainly realize many other equivalent forms of the application.
The above and other aspects, features and advantages of the present application will become more apparent in light of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present application will be described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the application, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the application in unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not intended to be limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.
The specification may use the word "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the application.
An embodiment of the present application provides a portable motor no-load test apparatus, as shown in fig. 1 and 2, where the apparatus in this embodiment includes:
the soft starter CMC may specifically be a three-phase asynchronous motor soft starter, and includes an input end, an output end, a first control end and a second control end. The input end is electrically connected with three-phase power supplies L1, L2 and L3; the output end is electrically connected with the input end of the motor M to be tested, and the first control end is electrically connected with first switches KA1-K 1 The method comprises the steps of carrying out a first treatment on the surface of the The soft starter is used for switching KA1-K at the first switch 1 Starting when closing so as to start the motor to be tested;
the control circuit, namely a soft start/stop control circuit, comprises a start switch SB which is serially connected in sequence 1 Stop switch SB 2 A first electromagnet coil KA1; the control circuit is used for starting the switch SB 1 On when closed, the first switch is controlled to be closed KA1-K based on the first electromagnet coil KA1 1 . In this embodiment, the switch SB is activated 1 Is a normally open type switch, and the switch SB is stopped 2 Is a normally closed type switch. Wherein, start switch SB 1 Parallel connection of the switches KA1-K enables SB by parallel connection of the switches KA1-K 1 The first electromagnet coil KA1 is turned on at the moment of closing and the switches KA1-K are closed, so that the control circuit is kept onConducting.
The detection end of the vibration sensor T2 is connected with the motor to be detected; the output end is electrically connected with the processor; and the vibration signal of the motor is detected after the motor is started, and the vibration signal is output to the processor, so that the processor is used for processing the vibration signal to obtain vibration parameters.
In the implementation process of this embodiment, the soft starter further includes a second control end, that is, an automatic control end; the second control end/automatic control end is connected in series with a bypass protection electromagnetic coil KM; the second control end is used for being conducted after the soft starter is started, and then the bypass protection electromagnetic coil KM is conducted. The control circuit is also connected with a thermal relay switch FR-K in series; the thermal relay switch FR-K is a normally closed type switch. The input end and the output end of the soft starter are connected in parallel with an overcurrent protection circuit; the overcurrent protection circuit comprises a bypass thermal relay coil FR and a first bypass contact switch KM-K which are connected in series in sequence 1 The method comprises the steps of carrying out a first treatment on the surface of the The first bypass contact switch KM-K 1 And the bypass protection coil KM is used for being closed when being conducted so as to conduct the overcurrent protection circuit. The thermal relay coil FR is used for short-circuiting when the motor to be detected is overloaded, and controlling the thermal relay switch FR-K in the control circuit to be disconnected, so that the control circuit is disconnected, and the three asynchronous motors are turned off softly. Wherein, "CMC6 7", "CMC 8 9" belong to soft start automatic control and may be referred to as a second control end or a soft start control end. After the motor to be tested reaches a certain rotating speed, the automatic bypass operation is controlled through a CMC6 7 end, and the CMC 8 9 end is used for soft start automatic fault identification.
In this embodiment, a normally closed emergency stop switch KH is connected in series between the control circuit and the power supply. A miniature circuit breaker Q1 is also connected in series between the control circuit and the power supply. And a switch isolation power supply R1 (380V/24V) is connected in parallel between the control circuit and the power supply. In addition, a fuse FU is connected in series between the control circuit and the power supply. The safety of operators can be ensured by arranging the switch isolated power supply R1. Through installing KH scram button at the weak current side, ensure whole return circuit emergency braking, set up fuse FU simultaneously and can ensure that secondary circuit trouble fuses.
In this embodiment, the second control end of the soft starter is further electrically connected with a fault indication circuit; the fault indication circuit comprises a second electromagnet coil KA2 and a fault indication lamp HL1 connected with the second electromagnet coil in parallel.
The portable motor no-load test device in the embodiment further comprises an operation indicating circuit; the operation indicating circuit comprises an operation indicating lamp HL2 and a second bypass contact switch KM-K connected in series with the operation indicating lamp HL2 2 The method comprises the steps of carrying out a first treatment on the surface of the The second bypass contact switch KM-K 2 And the bypass protection coil KM is closed when being conducted, and the operation indication circuit is conducted so as to enable the operation indication lamp to be lighted.
In a specific implementation process of this embodiment, the portable motor no-load test apparatus further includes a stop indication circuit, where the stop indication circuit includes a stop indicator lamp HL3 and second switches KA1-K connected in series with the stop indicator lamp 2 The method comprises the steps of carrying out a first treatment on the surface of the The second switches KA1-K 2 The first electromagnet coil KA1 is used for being disconnected when being switched on so as to turn off the stop indicator lamp; when the first electromagnet coil KA1 is opened, the stop indicator lamp is turned on.
The portable motor no-load test device in the embodiment further comprises a temperature acquisition sensor T1, wherein the checking end of the temperature sensor is connected with the motor to be tested and used for detecting the temperature of the motor to be tested.
In the implementation process of the embodiment, the portable motor no-load test device further comprises a voltmeter and an ammeter, wherein the voltmeter is used for detecting the voltage of the motor to be tested after the motor to be tested is started, and the ammeter is used for detecting the current of the motor to be tested after the motor to be tested is started.
The portable motor no-load test device in this embodiment is further provided with a memory, and the memory is electrically connected with the processor and is used for storing collected parameters of the motor to be tested, such as parameters including temperature, vibration times, voltage, current and the like.
In the embodiment, after the incoming line power supply of the control box is electrified, a Q0 (63A/3P) circuit breaker is used for installing a voltmeter for incoming line voltage measurement. The ammeter is used for auxiliary operation current measurement, and the CMC is used as a motor soft starter. The KM-K1 is a bypass contactor/a first bypass contact switch and is used for transferring motor load current after all CMC thyristors of the soft starter are conducted, so that the soft starter is protected, the service life of the soft starter is prolonged, meanwhile, a bypass thermal relay/thermal relay coil FR is installed, when the current is excessive, the thermal relay coil FR is used for short-circuiting when a motor to be tested is overloaded, and the thermal relay switch FR-K in the control circuit is controlled to be disconnected, so that the motor is efficiently protected. Q1 is a secondary circuit miniature breaker, R1 (380V/24V) switch isolation power supply is safely installed for operators, KH emergency stop buttons are installed on the weak current side, emergency braking of the whole circuit is guaranteed, FU guarantees that the secondary circuit breaks down, SB1 and SB2 are start-stop buttons, and T1 and T2 are temperature and vibration sensor modules respectively. The CMC soft starter has the functions of fault item monitoring protection, running current display, overload protection, overheat protection and the like, and displays related data in a microcomputer extension module.
The portable motor no-load test device in the embodiment is convenient to move, compact in size and light in weight, can realize that the motor with the maximum no-load current of less than 90KW is started and normally operated within 60A for 1.5h, 3 plug-in cables matched with the box body are conveniently selected and used according to motors with different specifications, the control panel can automatically input motor parameters (power, rated voltage and test time), intelligent display of expected target data (real-time current, whether phase failure, operating voltage and motor rotating speed) is realized (current overrun alarm, over-set current skip stop, voltage abnormal skip stop and phase failure response skip stop), the control cabinet box body installation buttons and the operating voltage are 24V safety voltage, and the portable motor no-load test device has the motor temperature data acquisition function, the vibration data acquisition function and can be electrified to acquire historical data after off-line.
When the motor to be tested needs to be subjected to no-load test, the portable motor no-load test device only needs to be connected with the soft starter of the portable motor no-load test device and the detection end of the vibration sensor, so that the starting of the motor to be tested and the detection of vibration parameters can be realized, no-load test of the motor to be tested is realized, the test time is shortened greatly, the motor does not need to be dumped or hoisted, and manpower and material resources are saved.
The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this application will occur to those skilled in the art, and are intended to be within the spirit and scope of the application.
Claims (5)
1. A portable motor no-load test apparatus, comprising:
the soft starter comprises an input end, an output end, a first control end and a second control end; the input end is electrically connected with a three-phase power supply; the output end is electrically connected with the input end of the motor to be tested, and the first control end is electrically connected with a first switch; the soft starter is used for starting when the first switch is closed so as to start the motor to be tested;
the control circuit comprises a start switch, a stop switch and a first electromagnet coil which are sequentially connected in series; the control circuit is used for being conducted when the starting switch is closed, and the first switch is controlled to be closed based on the first electromagnet coil;
the detection end of the vibration sensor is connected with the motor to be detected; the output end is electrically connected with the processor; the vibration signal detection device is used for detecting a vibration signal of the motor after the motor is started and outputting the vibration signal to the processor so as to obtain a vibration parameter by processing the vibration signal by the processor;
the second control end is connected with a bypass protection electromagnetic coil in series; the bypass protection electromagnetic coil is used for being conducted after the soft starter is started;
the control circuit is also connected with a thermal relay switch in series;
the input end and the output end of the soft starter are connected in parallel with an overcurrent protection circuit; the overcurrent protection circuit comprises bypass thermal relay coils and a first bypass contact switch which are sequentially connected in series; the first bypass contact switch is used for being closed when the bypass protection electromagnetic coil is conducted so as to conduct the overcurrent protection circuit; the bypass thermal relay coil is used for short-circuiting when the motor to be detected is overloaded, and controlling a thermal relay switch in the control circuit to be disconnected, so that the control circuit is disconnected, and the three asynchronous motors are turned off in a soft mode;
a normally closed emergency stop switch is also connected in series between the control circuit and the power supply;
a miniature circuit breaker is also connected in series between the control circuit and the power supply;
a switch isolation power supply is also connected in parallel between the control circuit and the power supply;
and a fuse is also connected in series between the control circuit and the power supply.
2. The apparatus of claim 1, wherein the second control terminal of the soft starter is further electrically connected with a fault indication circuit; the fault indication circuit comprises a second electromagnet coil and a fault indication lamp connected with the second electromagnet coil in parallel.
3. The apparatus of claim 1, wherein the portable motor no-load test apparatus further comprises an operation indication circuit; the operation indicating circuit comprises an operation indicating lamp and a second bypass contact switch connected with the operation indicating lamp in series; the second bypass contact switch is used for being closed when the bypass protection coil is conducted, and the operation indication circuit is conducted so that the operation indication lamp is lightened.
4. The apparatus of claim 1, wherein the portable motor no-load test apparatus further comprises a stop indication circuit comprising a stop indicator light and a second switch in series with the stop indicator light; the second switch is used for being disconnected when the first electromagnet coil is connected so as to enable the stop indicator lamp to be extinguished; the first electromagnet coil is closed when being opened so that the stop indicator light is lighted.
5. The device of claim 1, wherein the portable motor no-load test device further comprises a temperature acquisition sensor, and wherein an inspection end of the temperature acquisition sensor is connected with the motor to be tested and is used for detecting the temperature of the motor to be tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211128231.1A CN115561629B (en) | 2022-09-16 | 2022-09-16 | Portable motor no-load test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211128231.1A CN115561629B (en) | 2022-09-16 | 2022-09-16 | Portable motor no-load test device |
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| CN115561629A CN115561629A (en) | 2023-01-03 |
| CN115561629B true CN115561629B (en) | 2023-09-01 |
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| CN202211128231.1A Active CN115561629B (en) | 2022-09-16 | 2022-09-16 | Portable motor no-load test device |
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| CN115561629A (en) | 2023-01-03 |
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