CN220342031U - Automatic detection and protection device for motor - Google Patents

Abstract

The utility model discloses an automatic detection protection device for a motor, which comprises: including the motor body, set up the control box in the motor body outside, control box electric connection has at least one sensor, the control box is used for the record and shows sensor data and control motor body work, the sensor is used for detecting bearing and/or motor rear bearing and/or motor rotor temperature behind the motor, the control box with the sensor is all built-in to have independent power source, the motor of motor body stretches out the axle sleeve and is equipped with uninstallation part, the uninstallation part is controlled by the control box, can show the temperature of each position in the motor course of working through the cooperation of control box and sensor to shut down by control box control motor outage when motor temperature is unusual, timely protection motor, staff can look over the record information in the control box simultaneously, in time troubleshoot motor.

Description

Automatic detection and protection device for motor

Technical Field

The utility model belongs to the technical field of motor equipment, and particularly relates to an automatic motor detection protection device.

Background

At present, motor overload protection mainly comprises two modes: one is a thermal protector, a thermal deformation micro-switch is arranged in the thermal protector, when overload occurs, the current of a motor is overlarge, and the micro-switch in the thermal protector can overheat and deform and move, so that a power supply contactor is disconnected; the other is that the frequency converter is also speed regulation and also protection, when the motor works, the frequency converter designates a parameter value according to motor standards, including three-phase current, voltage, resistance, thermal protection value, open-term, short circuit, open-circuit and the like, and the frequency converter can protect and stop running due to stable or oversized parameter change, but the structures have obvious defects: the structure is complex, the cost is high, and the overhaul is troublesome; most of the motor overload protection method is to judge whether the motor is overloaded or not through the thermal protection value, but after the motor is overloaded for a period of time, the judgment of the thermal protection value is effective, so that the motor overload protection method has certain hysteresis. Thus, chinese patent publication No.: the Chinese patent of CN102904216B discloses a motor protection device which is arranged at the end part of a rotating shaft of a motor and comprises a proximity switch, a top contact seat, a mounting seat and at least two centrifugal actuating mechanisms, wherein the top contact seat comprises a sliding rod axially sliding along the rotating shaft, the top end of the sliding rod is provided with a conductor disc which is opposite to the proximity switch, when reaching a set position, the proximity switch is switched on, and the bottom end of the sliding rod is provided with a force application mechanism for separating the conductor disc from the proximity switch; the centrifugal actuating mechanism comprises a centrifugal block and a pry bar which are integrated, and when the rotating shaft of the motor rotates, the centrifugal block can be outwards opened and provide a moment for prying the sliding bar for the pry bar. The utility model is designed according to the principle that the rotating speed can be reduced when the motor is overloaded, so that the motor power supply can be cut off in time, no hysteresis is caused, and the motor is protected more timely and accurately.

However, the motor protection device can only protect the motor under the condition that the motor rotation speed is reduced, and when the motor is not greatly changed due to other abnormal reasons, but the motor cannot be effectively protected under abnormal temperature.

Disclosure of Invention

The utility model provides an automatic motor detection protection device, which aims to solve the problem that the existing motor protection device cannot comprehensively and timely feed back the problem of motor abnormality.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a motor automated inspection protection device, includes the motor body, sets up the control box in the motor body outside, control box electric connection has at least one sensor, the control box is used for the record and shows sensor data and control motor body work.

Further, the sensor is used for detecting the temperature of a front motor bearing and/or a rear motor bearing and/or a motor rotor.

Furthermore, the control box and the sensor are both internally provided with independent power supplies.

Furthermore, the motor extending shaft sleeve of the motor body is provided with an unloading part, and the unloading part is controlled by a control box.

Further, the unloading part includes: the electric motor is characterized in that the electric motor is matched with a driven shaft, a round hole matched with the size of the motor extension shaft is formed in the middle of the driven shaft, a plurality of limiting blocks are arranged on the side wall of the round hole of the driven shaft, slotted holes used for limiting block movement are formed in the side wall of the round hole of the driven shaft, limiting springs are arranged at the rear parts of the limiting blocks, the limiting springs enable the limiting block to extend out of the slotted holes, the other ends of the limiting springs are fixedly connected with electromagnets, the electromagnets are fixed at the bottoms of the slotted holes, limiting grooves corresponding to the limiting blocks are formed in the outer circumference of the motor extension shaft, and the limiting blocks can be pulled out of the limiting grooves of the motor extension shaft to be retracted into the slotted holes of the side wall of the round hole of the driven shaft after the electromagnets are electrified.

Further, the shape of the limiting block is a right trapezoid, the part of the limiting block extending out of the slot hole is a hypotenuse part of the right trapezoid, and the hypotenuse of the right trapezoid faces the motor body.

Compared with the prior art, the utility model has the following technical effects:

1. through the cooperation of control box and sensor, this motor protection device can be as required the temperature of optional real-time supervision front bearing, rear bearing and rotor winding to show and the record on the control box, can record the operation duration, when the temperature of sensor detection rotor exceeded 45 degrees, indicate to start working, temperature signal is for starting the record time, and when the certain sensor temperature of motor was too high, can send out the police dispatch newspaper on the control box, and control motor outage, the temperature record of sensor can look over simultaneously, investigation problem after can making things convenient for the motor trouble.

2. Through the setting of uninstalling part, after the temperature that the sensor detected exceeded the maximum temperature of settlement, the control box can break off motor power and start the electromagnet in the uninstalling part for the stopper breaks away from the spacing groove, makes driven shaft and motor extension axle quick separation, avoids the motor to delay work under the condition of high temperature, causes further damage to the motor, plays a timely purpose of protecting the motor.

Drawings

FIG. 1 is a schematic diagram of an automatic motor detection and protection device according to the present utility model;

FIG. 2 is a semi-sectional view of an unloading part of an automatic motor detection and protection device according to the present utility model;

fig. 3 is a sectional view of an unloading part of an automatic motor detection and protection device according to the present utility model.

In the figure: 1. a motor body; 2. a control box; 3. an unloading part; 4. a driven shaft; 5. a limiting block; 6. a limit spring; 7. an electromagnet; 8. the motor extends out of the shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings in conjunction with the specific embodiments of the present application.

As shown in the figure, in one embodiment of the present utility model, a motor automatic detection protection device includes a motor body 1, a control box 2 disposed outside the motor body 1, where the control box 3 is electrically connected with a first sensor, a second sensor and a third sensor, the first sensor is used for detecting the temperature of a bearing before the motor, the second sensor is used for detecting the temperature of a bearing after the motor, the third sensor is used for detecting the temperature of a motor rotor winding, the control box 2 is used for recording and displaying data of each sensor and controlling the motor body 1 to work, when the temperature of any one sensor exceeds a preset temperature value of the control box 2, the control box 2 controls the motor body 1 to be powered off, and gives an alarm to a worker, and the control box 2, the first sensor, the second sensor and the third sensor are all built in with independent power sources, so that the control box 2 can still display the temperature of each position after the motor body 1 is powered off, the worker can conveniently check the temperature of each position, and the control box 2 has the history temperature of each position, so that the worker can quickly check the motor fault; the motor body 1 includes: the motor comprises a base, a motor housing arranged above the base, wherein a junction box is arranged on one side of the motor housing, a rear bearing is arranged in the middle of the rear side of the motor housing, a rear end cover is arranged on the rear side of the motor housing, a front bearing seat is arranged on the front side of the motor housing, a front bearing is arranged in the middle of the front bearing seat, a front end cover is fixedly connected with the front side of the front bearing seat, a rotor is arranged in the middle of the motor housing, a motor extension shaft 8 is fixedly connected with the front side of the rotor, an extension section of the rear side of the rotor is matched with the rear bearing, the motor extension shaft 8 is matched with the front bearing, a stator is arranged on the inner side wall of the motor housing, a plurality of rotor windings are uniformly distributed in the circumferential direction of the rotor, a second sensor is arranged at the position corresponding to the rear end cover and the rear bearing, an inductive head of the second sensor is in contact with the rear bearing, a first sensor is arranged at the corresponding position of the front end cover and the front bearing, the inductive head of the first sensor is in contact with the front bearing, a third sensor is arranged on one side of the rotor, the inductive head of the third sensor is in contact with the rotor windings, a motor control box 2 is arranged above the motor extension shaft 8, a motor unloading control box 3 is arranged on the motor unloading control box, a motor unloading part 3 is arranged on the motor extension shaft 3, and the motor unloading control box is further damaged when the motor 2 is unloaded, and the motor control box is prevented from being damaged by the motor unloading part 3.

As shown in fig. 2 to 3, in one embodiment of the present utility model, the unloading part 3 includes: the driven shaft 4 matched with the motor extension shaft 8, a round hole matched with the motor extension shaft 8 in size is formed in the middle of the driven shaft 4, a plurality of limiting blocks 5 are arranged on the side wall of the round hole of the driven shaft 4, slotted holes used for moving the limiting blocks 5 are formed in the side wall of the round hole of the driven shaft 4, limiting springs 6 are arranged at the rear parts of the limiting blocks 5, the limiting springs 6 enable part of the limiting blocks 5 to extend out of the slotted holes, the other ends of the limiting springs 6 are fixedly connected with electromagnets 7, the electromagnets 7 are fixed at the bottoms of the slotted holes, limiting grooves corresponding to the limiting blocks 5 are formed in the outer circumference of the motor extension shaft 8, and after the electromagnets 7 are electrified, the limiting blocks 5 can be pulled out of the limiting grooves of the motor extension shaft 8 and retracted into the slotted holes of the round hole side wall of the driven shaft 4, so that the unloading part 3 and the motor extension shaft 8 are separated, and unloading is achieved.

In one embodiment of the present utility model, as shown in fig. 2-3, the shape of the limiting block 5 is a right trapezoid, the part of the limiting block 5 protruding out of the slot hole is the hypotenuse part of the right trapezoid, and the hypotenuse of the right trapezoid faces the motor body 1, and the shape and the orientation of the limiting block 5 can facilitate the installation of the driven shaft 4 on the motor protruding shaft 8, so that the driven shaft 4 can be simply pushed into the output shaft, and the installation mode is simplified.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and improvements could be made by those skilled in the art without departing from the inventive concept, which falls within the scope of the present utility model.

Claims (3)

1. The automatic motor detection protection device is characterized by comprising a motor body (1) and a control box (2) arranged on the outer side of the motor body (1), wherein the control box (2) is electrically connected with at least one sensor, and the control box (2) is used for recording and displaying sensor data and controlling the motor body (1) to work; the sensor is used for detecting the temperature of a front motor bearing and/or a rear motor bearing and/or a motor rotor; independent power supplies are arranged in the control box (2) and the sensor; the motor body (1) is characterized in that a motor extension shaft (8) is sleeved with an unloading part (3), and the unloading part (3) is controlled by a control box (2).

2. An automatic motor detection and protection device according to claim 1, characterized in that said unloading means (3) comprise: with motor extension axle (8) complex driven shaft (4), the round hole with motor extension axle (8) size adaptation has been seted up at the middle part of driven shaft (4), the round hole lateral wall of driven shaft (4) is provided with a plurality of stopper (5), be used for the slotted hole that stopper (5) removed is seted up to the round hole lateral wall of driven shaft (4), the rear portion of stopper (5) all is provided with spacing spring (6), spacing spring (6) makes stopper (5) part stretch out the slotted hole, the other end of spacing spring (6) all with electromagnet (7) fixed connection, electromagnet (7) are fixed in the slotted hole bottom, the outer circumference of motor extension axle (8) seted up with the spacing groove that corresponds of stopper (5), in the slotted hole of the round hole lateral wall of retraction driven shaft (4) can be pulled out stopper (5) from the spacing inslot of motor extension axle (8) after the circular telegram.

3. An automatic motor detection and protection device according to claim 2, characterized in that the shape of the limit block (5) is a right trapezoid, the part of the limit block (5) extending out of the slot is the hypotenuse part of the right trapezoid, and the hypotenuse of the right trapezoid faces the motor body (1).