A deceleration motor brake protection device

Abstract

The application provides a kind of deceleration motor brake protection device, including first shell, the first end inner wall of the first shell is fixedly connected with motor, the second end outer wall of the first shell is fixedly connected with fixed cylinder, the end of the fixed cylinder away from the first shell is fixedly connected with electromagnetic shell disc, the output shaft of the motor is fixed with permanent magnet, the permanent magnet is located in the electromagnetic shell disc, the inside circumferential of the electromagnetic shell disc is equipped with armature column, the armature column is wound with induction wire, the inside lateral wall of the first shell is equipped with rotating speed detector, the outside of the first shell is equipped with current regulator, central controller, the induction wire is electrically connected with the current regulator, the rotating speed detector, current regulator is electrically connected with the central controller respectively.The application can adjust the size of current in electromagnet according to the real-time rotating speed of motor, prolong the service life of wire.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brake motor, in particular to a brake protection device for a deceleration motor. BACKGROUND

[0002] The brake motor is also called electromagnetic power-off brake motor, brake asynchronous motor, and is a full-closed, self-fan-cooled, squirrel-cage type, additional DC electromagnet brake asynchronous motor. The brake motor has high positioning accuracy requirements, and should have the characteristics of rapid braking, accurate positioning, safety and reliability, interchangeable brake system, simple structure, easy replacement and maintenance, etc. In many scenes, the brake motor is needed to control the motor inertia and achieve the required accurate positioning to realize the automatic work of the machinery.

[0003] The electromagnetic brake motor plays an important role in the production and processing process. The electromagnetic brake relies on the interaction force between the magnetic poles to realize braking, but the electromagnet generates magnetic force through current every time, which is full load current, and is easy to damage the service life of the wire in the electromagnet. Therefore, a brake motor is needed which can adjust the current size in the electromagnet according to the real-time speed of the motor.

[0004] Therefore, the present application provides a brake protection device for a deceleration motor, which can adjust the current size in the electromagnet according to the real-time speed of the motor, protect the wire in the electromagnet, and prolong the service life of the wire. SUMMARY

[0005] In view of the defects in the prior art, the present application aims to provide a brake protection device for a deceleration motor.

[0006] The brake protection device for a deceleration motor provided by the present application comprises a first shell, the first shell has a first end and a second end arranged oppositely, a motor is fixedly connected to the inner wall of the first end of the first shell, a fixing cylinder is fixedly connected to the outer wall of the second end of the first shell, an electromagnetic shell disc is fixedly connected to the end of the fixing cylinder away from the first shell, the output shaft of the motor penetrates through the second end of the first shell, the fixing cylinder and the electromagnetic shell disc, a permanent magnet is fixedly arranged on the output shaft of the motor, the permanent magnet is located in the electromagnetic shell disc, an armature column is arranged in the inner part of the electromagnetic shell disc in a circumferential direction, an induction wire is wound around the armature column, a rotating speed detector is arranged on the inner side wall of the first shell, the rotating speed detector is configured to detect the rotating speed of the output shaft, a current regulator and a central controller are arranged outside the first shell, the induction wire is electrically connected to the current regulator, the rotating speed detector and the current regulator are respectively electrically connected to the central controller, the central controller receives the input signal of the rotating speed detector, and the central controller sends an output signal to the current regulator.

[0007] Preferably, the second end wall of the first shell is provided with a bearing, and an output shaft of the motor is connected with the first shell through the bearing; the armature column is arranged in an annular array along the circumference of the electromagnetic shell disc.

[0008] Further, the first end outer wall of the first shell is provided with a cooling device, the cooling device comprising a cold gas shell, a hot gas shell and a vortex tube, the cold gas shell being connected with the first end of the first shell, the first end wall of the first shell being provided with an air inlet hole, the inside of the first shell being in communication with the inside of the cold gas shell through the air inlet hole; the cold gas output end of the vortex tube being connected with the cold gas shell, the hot gas output end of the vortex tube being connected with the hot gas shell; the vortex tube being provided with a connecting pipe, and the first shell being further provided with an air outlet hole.

[0009] Preferably, the air inlet hole is obliquely arranged on the first end wall of the first shell, and the air inlet hole is arranged towards the motor; the inside of the hot gas shell is provided with an "S"-shaped air guide channel, and the hot gas output end of the vortex tube is in communication with the air guide channel of the hot gas shell.

[0010] Preferably, the cold gas shell and the hot gas shell are made of copper material, and the outside of the hot gas shell is provided with a heat insulation layer.

[0011] Further, a thermoelectric power sheet is arranged between the cold gas shell and the hot gas shell, the hot end and the cold end of the thermoelectric power sheet being respectively in abutment with the hot gas shell and the cold gas shell; a storage battery is arranged on the first shell, and the thermoelectric power sheet and the central controller are respectively electrically connected with the storage battery.

[0012] Further, the central controller is provided with a current automatic adjustment module, the current automatic adjustment module storing a minimum current value prediction model, after the central controller receives the rotation speed data sent by the rotation speed detector, the minimum current value prediction model calculates the minimum current value for the motor to immediately brake and stop, the central controller sends the minimum current value to the current regulator, and the current regulator adjusts the current value of the induction coil to the minimum current value.

[0013] Further, the establishment method of the minimum current value prediction model is as follows:

[0014] S1, obtaining a data set when the current in the induction coil can achieve immediate brake stop of the output shaft of the motor at different rotation speeds, each sample in the data set comprising output shaft rotation speed and minimum current value of the induction coil to achieve immediate brake stop of the output shaft at the current rotation speed;

[0015] S2, training a machine learning model using the data set, wherein the machine learning model takes the standardized output shaft speed as input, takes the minimum current value in the induction wire under the output shaft immediate brake stop as output, and obtains the minimum current value prediction model through supervised learning.

[0016] Preferably, the data set is divided into a training set and a validation set, a plurality of machine learning models are trained simultaneously using the training set, the performance accuracy of different machine learning models is evaluated using the validation set, and the best-performing machine learning model is selected to construct the minimum current value prediction model.

[0017] Preferably, the machine learning model is at least one of logistic regression, linear discriminant analysis, K-nearest neighbor, naive Bayes, support vector machine, random forest, and neural network.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] The minimum current value prediction model designed by the machine learning model can quickly obtain the minimum current value in the induction wire under the output shaft immediate brake stop, and the motor output shaft can be immediately stopped under the minimum current. The present application not only saves electric energy, but also eliminates the need for a large load current to flow through the induction wire each time, thereby prolonging the service life of the induction wire. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings:

[0021] Figure 1 FIG. 1 is a structural schematic diagram of a speed reduction motor brake protection device according to an embodiment of the present application;

[0022] Figure 2 FIG. 2 is a cross-sectional schematic diagram of the speed reduction motor brake protection device according to the embodiment of the present application;

[0023] Figure 3 FIG. 3 is an electromagnetic shell disc structure schematic diagram of the speed reduction motor brake protection device according to the embodiment of the present application;

[0024] Figure 4 FIG. 4 is a vortex tube connection schematic diagram of the speed reduction motor brake protection device according to the embodiment of the present application;

[0025] Figure 5 FIG. 5 is a motor structure schematic diagram of the speed reduction motor brake protection device according to the embodiment of the present application;

[0026] Figure 6 FIG. 6 is a first shell air inlet hole schematic diagram of the speed reduction motor brake protection device according to the embodiment of the present application;

[0027] Figure 7 The control system schematic diagram of the speed reduction motor brake protection device of the embodiment of the present application is shown in the figure.

[0028] Figure 8 The minimum current value prediction model flow chart of the speed reduction motor brake protection device of the embodiment of the present application is shown in the figure.

[0029] In the figure, 1 is a thermoelectric power piece, 2 is a cold gas shell, 3 is a first shell, 4 is an air outlet hole, 5 is a gas guide channel, 6 is a heat insulation layer, 7 is a vortex tube, 8 is a storage battery, 9 is a central controller, 10 is a current regulator, 11 is a fixed cylinder, 12 is an electromagnetic shell disc, 13 is an output shaft, 14 is a permanent magnet, 15 is an armature column, 16 is an induction wire, 17 is a bearing, 18 is a motor, 19 is a temperature sensor, 20 is an air inlet hole, 21 is a hot gas shell, 22 is a rotating speed detector, 23 is an air compression pump, and 24 is a connecting pipe. DETAILED DESCRIPTION

[0030] The present application will be described in detail below with specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the concept of the present application. These all belong to the protection scope of the present application.

[0031] The present application provides a speed reduction motor brake protection device, which can calculate the minimum current value of the motor immediate brake stop according to the real-time rotating speed of the motor, and brake the motor at the minimum current value, thereby saving electric energy and improving the service life of the induction wire.

[0032] As shown in Figure 1 and Figure 2 , in one specific embodiment, the speed reduction motor brake protection device has a first shell 3, the inner wall of the first end of the first shell 3 is fixedly connected with a motor 18, the outer wall of the second end of the first shell 3 is connected with a fixed cylinder 11, the fixed cylinder 11 is a hollow structure; the other end of the fixed cylinder 11 is connected with an electromagnetic shell disc 12, the inside of the electromagnetic shell disc 12 is also a hollow structure. The output shaft 13 of the motor 18 passes through the second end wall of the first shell 3 and passes through the fixed cylinder 11 and the electromagnetic shell disc 12, and the tail end is located outside the electromagnetic shell disc 12. As shown in Figure 2 and Figure 5 , a permanent magnet 14 is sleeved on the output shaft 13, the permanent magnet 14 is a disc-shaped structure, and the permanent magnet 14 is located in the electromagnetic shell disc 12 and is placed at the center position inside the electromagnetic shell disc 12 as much as possible. The inner wall of the electromagnetic shell disc 12 is provided with an armature column 15 along the circumferential direction, as shown in Figure 3As shown, the armature columns 15 are arranged in a ring array, and the armature columns 15 are located in the circumferential direction of the permanent magnet 14. The outer wall of the first shell 3 is provided with a central controller 9 and a current regulator 10, and the inner wall of the first shell 3 is provided with a rotating speed detector 22, which is arranged towards the output shaft 13 and is used to detect the rotating speed of the output shaft 13. The rotating speed detector 22 is electrically connected with the central controller 9 and sends the detected rotating speed information to the central controller 9. Each armature column 15 is wound with an induction wire 16, and each induction wire 16 is connected with the current regulator 10, which is further connected with an external power supply, so as to control the current size of the induction wire 16 through the current regulator 10. The current regulator 10 is electrically connected with the central controller 9, and the central controller 9 sends current information to the current regulator 10 according to the received rotating speed signal.

[0033] The second end wall of the first shell 3 is provided with a bearing 17, and the output shaft 13 passes through the bearing 17, so that the output shaft 13 is supported and can rotate by the bearing 17.

[0034] The speed reducer motor brake protection device of the above embodiment is provided with a current automatic regulation module in the central controller 9. Under the real-time rotating speed, the current automatic regulation module controls the current in the induction wire 16 to be at the minimum, so as to realize the immediate brake stop of the output shaft 13. The current automatic regulation module is internally provided with a minimum current value prediction model. When the rotating speed of the output shaft 13 is sent to the central controller 9 through the rotating speed detector 22, the minimum current value prediction model calculates the minimum current value in the induction wire 16 to realize the immediate brake stop of the output shaft 13, and then the central controller 9 sends the minimum current value to the current regulator 10, and the current regulator 10 adjusts the current value of the induction wire 16 to the calculated minimum current value.

[0035] As shown in the above embodiment, the establishment method of the minimum current value prediction model is as follows: Figure 8

[0036] S1, a large number of data sets of the current in the induction wire 16 under different rotating speeds of the output shaft 13 to realize the immediate brake stop of the output shaft 13 are obtained, each sample in the data set includes the rotating speed of the output shaft 13 and the minimum current value in the induction wire 16 under the rotating speed to realize the immediate brake stop of the output shaft 13; the data set is divided into a training set and a validation set, a plurality of machine learning models are trained simultaneously by using the training set, the performance accuracy of different machine learning models is evaluated by using the validation set, and the best machine learning model is selected to construct the minimum current value prediction model;

[0037] ​S2, training the machine learning model with the data set, wherein the machine learning model takes the speed of the output shaft 13 after standardization as input, takes the minimum current value in the induction wire 16 at the speed of the output shaft 13 to stop immediately as output, and obtains the minimum current value prediction model through supervised learning, wherein the selected machine learning model is at least one of logistic regression, linear discriminant analysis, K-nearest neighbor, naive Bayes, support vector machine, random forest, neural network.

[0038] As shown in Figure 1 , Figure 2 In another embodiment, the speed reduction motor brake protection device is also provided with a cooling device outside the first housing 3, which includes a cold gas shell 2, a hot gas shell 21 and a vortex tube 7. The cold gas shell 2 is fixed to the first end of the first housing 3, and the inner cavity of the cold gas shell 2 is separated from the inner cavity of the first housing 3 by the first end wall of the first housing 3. As shown in Figure 2 and Figure 6 An air inlet hole 20 is arranged on the first end wall of the first housing 3, which communicates the inner cavity of the first housing 3 with the inner cavity of the cold gas shell 2; and an air outlet hole 4 is also arranged on the side wall of the first housing 3. The cold gas outlet end of the vortex tube 7 communicates with the cold gas shell 2, and the hot gas outlet end of the vortex tube 7 communicates with the hot gas shell 21. As shown in Figure 4 The gas inlet end of the vortex tube 7 is provided with a connecting pipe 24, through which an air compressor pump 23 can be connected. A temperature sensor 19 is also arranged in the first housing 3, and is arranged as close as possible to the side wall of the motor 18 to more accurately measure the temperature around the motor 18. The temperature sensor 19 is electrically connected with the central controller 9, and when the external air compressor pump 23 is connected, the air compressor pump 23 is also electrically connected with the central controller 9. When the central controller 9 detects that the motor 18 is in a high temperature state through the temperature sensor 19, the air compressor pump 23 is immediately driven to input compressed air into the vortex tube 7 through the connecting pipe 24, the cold gas outlet end of the vortex tube 7 outputs cold gas into the cold gas shell 2, the cold gas flow enters the first housing 3 through the plurality of air inlet holes 20, and after taking away the heat of the motor 18, the hot gas flow is discharged from the plurality of air outlet holes 4.

[0039] The hot gas shell 21 is internally provided with a continuous S-shaped air guide channel 5, and the hot gas outlet end of the vortex tube 7 communicates with the air guide channel 5. The air inlet hole 20 is arranged obliquely relative to the end wall of the first housing 3, and is arranged towards the motor 18, so that the gas entering from the air inlet hole 20 can be directed towards the motor 18 to achieve rapid cooling of the motor 18.

[0040] As shown in Figure 1 and Figure 2As shown, in other embodiments of the present application, the cold shell 2 and the hot shell 21 are fixedly connected with the thermoelectric power generation sheet 1, and the hot end and the cold end of the thermoelectric power generation sheet 1 are respectively in abutment with the wall surface of the hot shell 21 and the cold shell 2. The outer wall of the first shell 3 is provided with the storage battery 8, and the thermoelectric power generation sheet 1 and the central controller 9 are electrically connected with the storage battery 8. The cold shell 2 and the hot shell 21 are made of copper material with high thermal conductivity, and the outer side of the hot shell 21 is provided with the heat insulation layer 6. After the pneumatic air compression pump 23, the hot gas output end of the vortex tube 7 outputs the hot gas into the air guide channel 5 in the hot shell 21, and after the hot gas is discharged along the S-shaped air guide channel 5, the temperature of the hot shell 21 is increased, while the wall temperature of the opposite cold shell 2 is lower. At this time, the thermoelectric power generation sheet 1 generates electricity according to the temperature difference between the cold shell 2 and the hot shell 21, and the electricity is input into the storage battery 8 for storage, thereby providing the central controller 9 and the like with electric energy. The control logic of the embodiment is shown in Figure 7

[0041] The working principle of the deceleration motor brake protection device of the embodiment is as follows: when the motor 18 stops working, the output shaft 13 will continue to rotate under the action of inertia, and when it is necessary to immediately stop the rotation of the output shaft 13 on the motor 18, the rotation speed of the output shaft 13 is first detected by the rotation speed detector 22, and the rotation speed value is sent to the central controller 9. The minimum current value prediction model stored in the central controller 9 calculates the minimum current value of the induction coil 16 to achieve the immediate brake stop of the output shaft 13 at the corresponding rotation speed. Then the central controller 9 controls the current regulator 10 to adjust the current value input to the induction coil 16 to the calculated minimum current value. After the induction coil 16 is energized, the armature column 15 has magnetism, and the resistance between the armature column 15 with magnetism and the permanent magnet 14 on the output shaft 13 can quickly slow down and stop the output shaft 13.

[0042] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the present application. In the case of no conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.​

Claims

1. A speed-reducing motor brake protection device comprising a first housing, characterized by, The first shell has oppositely arranged first and second ends, a motor is fixedly connected to the inner wall of the first end of the first shell, a fixed cylinder is fixedly connected to the outer wall of the second end of the first shell, an electromagnetic shell disc is fixedly connected to the end of the fixed cylinder away from the first shell, the output shaft of the motor passes through the second end of the first shell, the fixed cylinder and the electromagnetic shell disc, a permanent magnet is fixedly arranged on the output shaft of the motor, the permanent magnet is located in the electromagnetic shell disc, an armature column is circumferentially arranged in the electromagnetic shell disc, an induction wire is wound around the armature column, a rotating speed detector is arranged on the inner side wall of the first shell, the rotating speed detector is configured to detect the rotating speed of the output shaft, a current regulator and a central controller are arranged on the outside of the first shell, the induction wire is electrically connected to the current regulator, the rotating speed detector and the current regulator are respectively electrically connected to the central controller, the central controller receives the input signal of the rotating speed detector, the central controller sends an output signal to the current regulator, a cooling device is arranged on the outer wall of the first end of the first shell, the cooling device comprises a cold gas shell, a hot gas shell and a vortex tube, the cold gas shell is connected to the first end of the first shell, an air inlet hole is arranged on the first end wall of the first shell, the inside of the first shell is in communication with the inside of the cold gas shell through the air inlet hole, the cold gas output end of the vortex tube is connected to the cold gas shell, the hot gas output end of the vortex tube is connected to the hot gas shell, a connecting pipe is arranged on the vortex tube, and an air outlet hole is further arranged on the first shell.

2. The gear motor brake protection device according to claim 1, wherein, A bearing is arranged on the second end wall of the first shell, and the output shaft of the motor is connected to the first shell through the bearing; the armature column is arranged in an annular array along the circumference of the electromagnetic shell disc.

3. The gear motor brake protection device of claim 1, wherein, The air inlet hole is arranged obliquely on the first end wall of the first shell, and the air inlet hole is arranged towards the motor; the inside of the hot gas shell is provided with an "S"-shaped air guide channel, and the hot gas output end of the vortex tube is in communication with the air guide channel of the hot gas shell.

4. The gear motor brake protection device of claim 1, wherein, The cold gas shell and the hot gas shell are made of copper material, and the outside of the hot gas shell is provided with a heat insulation layer.

5. The gear motor brake protection device of claim 1, wherein, A thermoelectric power sheet is arranged between the cold gas shell and the hot gas shell, the hot end and the cold end of the thermoelectric power sheet are respectively in abutment with the hot gas shell and the cold gas shell, a storage battery is arranged on the first shell, and the thermoelectric power sheet and the central controller are respectively electrically connected to the storage battery.

6. The gear motor brake protection device of claim 1, wherein, An automatic current adjusting module is arranged on the central controller, a minimum current value prediction model is stored on the automatic current adjusting module, after the central controller receives the rotating speed data sent by the rotating speed detector, the minimum current value prediction model calculates the minimum current value for the motor to immediately brake and stop, the central controller sends the minimum current value to the current regulator, and the current regulator adjusts the current value of the induction wire to the minimum current value.

7. The gear motor brake protection device of claim 6, wherein, The establishment method of the minimum current value prediction model is: S1, obtaining a data set of the current in the induction wire under different rotating speeds of the output shaft of the motor, each sample in the data set including the rotating speed of the output shaft, the minimum current value in the induction wire under the current rotating speed to achieve immediate brake stop of the output shaft; S2, training a machine learning model using the data set, wherein the machine learning model takes the standardized rotating speed of the output shaft as input, takes the minimum current value in the induction wire under the rotating speed to achieve immediate brake stop of the output shaft as output, and obtains a minimum current value prediction model through supervised learning.

8. The gear motor brake protection device of claim 7, wherein, The data set is divided into a training set and a validation set, a plurality of machine learning models are trained simultaneously using the training set, the performance accuracy of different machine learning models is evaluated using the validation set, and the best-performing machine learning model is selected to construct the minimum current value prediction model.

9. The gear motor brake protection device of claim 8, wherein, The machine learning model is at least one of logistic regression, linear discriminant analysis, K-nearest neighbor, naive Bayes, support vector machine, random forest, and neural network.

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