另外阀门的不同结构决定着它的流量特性，根据想要的流量变化来进行阀门的选

In addition, the different structure of the valve determines its flow characteristics. It is also a common method for many people to choose the valve according to the desired flow change. In this way, while saving costs, the traffic can be accurately transmitted. As shown in Figure 2-3, there are three common flow characteristic curves. This article selects a linear flow control valve. There is a linear relationship between the valve opening and the flow rate. The rotation of the motor drives the movement of the valve core. The opening of the water nozzle changes with the movement of the valve core at any time, thereby realizing flow adjustment. <br><br>The downhole flow regulating valve is a kind of electric device, which is controlled by a motor. Because the DC motor has the characteristics of small size, simple structure, convenient control, etc., and it has an advantage in automatic control. Therefore, this article selects a DC motor to control the flow regulating valve. Correspondingly, while the motor adjusts the direction of the opening of the water nozzle through forward and reverse rotation, the reducer assists in adjusting the size of the opening. <br><br>DC motors are divided into brushes and brushless motors. Brush motors can be divided into permanent magnet brushes and electromagnetic brushes, and they are widely used in drive devices and servo systems [50]. Among them, the permanent magnet brushed DC motor not only has the characteristics of speed regulation and good starting, but also has the characteristics of fast response. At the same time, it has a wide range of speed regulation, which can meet the requirements of the motor in the stratified water injection control. Therefore, this article chooses the German Faulhaber024C DC micro <br><br>1- <br><br>motor. <br><br>In addition, the reducer is a transmission device that connects the motor and the working mechanism, mainly to change the torque of the motor's adjusting arm, and then better control. There are many types of reducers, and different choices can be made according to different needs. There are mainly the following: The <br><br>biggest feature of the turbo-worm reducer is that it can be locked and the reduction ratio is relatively large, but there are still shortcomings that cannot be ignored, that is, its input and output shafts are not on the same axis. In addition, the input and output shafts occupies a plane, and at the same time has a large volume, the transmission efficiency and accuracy are not very high. <br><br>Harmonic reducer, mainly through elastic deformation for movement and power transmission. It has the advantages of small size and high precision, and at the same time, has the inevitable shortcomings. That is, its flexspline is not particularly shock-resistant, its rigidity is not as good as that of metal, and its life span is also limited, and it also has a certain limit on the input speed.

In addition, the different structure of the valve determines its flow characteristics, according to the desired flow changes to the valve selection is also a common method used by many people. This saves money while accurately delivering traffic. As shown in Fig. 2-3, there are three common flow characteristic curves, and this paper selects a linear flow control valve. There is a linear relationship between valve opening and flow size, which drives the movement of the valve core by turning the motor, and the opening of the water nozzle changes with the movement of the valve core at any time, thus realizing flow regulation.<br><br>The underground flow control valve is one. electric device, controlled by a motor. Because DC motor has the characteristics of small size, simple structure, convenient control and so on, and in the automatic control of the advantages. Therefore, this paper selects the DC motor to control the flow control valve. Correspondingly, the reducer assists in adjusting the size of the opening degree of the water nozzle by reversing and forwarding the motor to adjust the direction of the water nozzle opening.<br><br>The DC motor has brush and brushless, brush motor can be divided into permanent magnetic brush and electromagnetic brush, and in the drive device and servo system is widely used. Among them, permanent magnet has brush DC motor, not only has the characteristics of speed control and good start-up, but also has the characteristics of fast response. At the same time, its speed control range is very large, can meet the requirements of the motor in the layered water injection control. Therefore, this article selects the German Faulhaber024C type DC micro<br><br>1-<br><br>Motor.<br><br>In addition, the gearbox is a transmission device that connects the motor to the working mechanism, mainly by changing the torque of the motor adjustment arm for better control. There are many kinds of gearboxes that can be selected differently depending on the need. There are the following:<br><br>The biggest feature of the turbo rod reducer is that it can be anti-lock, and the deceleration ratio is relatively large, but there are still shortcomings that can not be ignored, that is, its input and output axis is not on the same axis, and the input and output axis each occupies a plane, at the same time has a larger volume, transmission efficiency and accuracy is not very high.<br><br>Harmonic decelerators are mainly used for motion and power transfer through elastic deformation. It has the advantages of small size and high precision, and at the same time, it has inevitable disadvantages. Is its soft wheel is not particularly impact-resistant, rigid as metal, and life is also limited, the input speed also has --- certain limits.

In addition, the different structure of the valve determines its flow characteristics. It is also a common method for many people to choose the valve according to the desired flow change. In this way, the cost can be saved and the traffic can be accurately transmitted. As shown in Figure 2-3, there are three common flow characteristic curves, and a linear flow control valve is selected in this paper. There is a linear relationship between the valve opening and the flow rate. Through the rotation of the motor, the valve core moves. The opening of the water nozzle changes at any time with the movement of the valve core, so as to realize the flow regulation.<br>Downhole flow control valve is an electric device, which is controlled by motor. Because DC motor has the characteristics of small volume, simple structure, convenient control and so on, and has a stable advantage in automatic control. So this paper selects DC motor to control the flow control valve. Correspondingly, when the motor adjusts the opening direction of the water nozzle through forward rotation and reverse rotation, the reducer helps to adjust the opening.<br>The DC motor can be divided into brush and brushless, and the brush motor can be divided into permanent magnet brush and electromagnetic brush, and it is widely used in driving device and servo system [50]. Among them, permanent magnet brushless DC motor not only has the characteristics of good speed regulation and start-up, but also has the characteristics of fast response. At the same time, it has a wide range of speed regulation, which can meet the requirements of motor in stratified water injection control. Therefore, this paper selects the German faulhaber024c DC micro converter<br>1-<br>electric machinery.<br>In addition, the reducer is a kind of transmission device, which connects the motor and the working mechanism, mainly to change the torque of the motor adjusting arm, so as to better control. There are many kinds of reducer, according to different needs, different choices. There are mainly the following types:<br>The biggest characteristic of turbine scroll rod reducer is that it can carry out anti lock, and the reduction ratio is relatively large, but there are still some shortcomings that can not be ignored, that is, its input and output shafts are not on the same axis, and the input and output shafts occupy a plane, and at the same time, it has a large volume, so the transmission efficiency and accuracy are not very high.<br>Harmonic reducer, mainly through the elastic deformation of the movement and power transmission. It has the advantages of small volume and high precision, but also has inevitable disadvantages. That is, its flexspline is not particularly shock resistant, not as rigid as metal, and its life is limited, and it also has a certain limit on the input speed.<br>