a water pump

Abstract

The invention provides a water pump, including a motor and an impeller, which is characterized in that a motor speed signal sampling device directly connected to the motor is arranged between the motor and the impeller, including a signal collection board and a signal generator, and the signal generator is connected to the motor. The output shaft can rotate freely with the output shaft. The signal acquisition board is provided with a signal acquisition output line interface and a motor output line interface, and the signal acquisition output line and the motor output line are respectively connected with the microcomputer including the PWM motor speed control module. The processor is connected; the signal generator includes a plurality of magnet blocks, which are evenly arranged along the edge of the bottom plate of the signal generator, and the signal acquisition board is provided with a Hall chip corresponding to a single magnet block. It can not only sample the initial high-speed signal of the motor, adjust the speed change of the motor in time to ensure the stable operation of the motor, but also can automatically locate the water pump, which is convenient for the staff to check and maintain, and can automatically display the performance parameters of the water pump. .

Description

technical field [0001] The invention relates to the field of water pumps, in particular to a water pump with a stable motor. Background technique [0002] Most of the existing water pumps use the motor to drive the impeller to rotate, which is used to transport liquid or pressurize the liquid. Different types of water pumps have a certain rated power when they work, and there is a standard value for the motor speed. After running for a long time, its speed will often change, sometimes it will be low, sometimes it will be high. The low speed of the motor will cause the lift of the liquid to be transported to be substandard, or the pressurization of the liquid is not enough, and the motor speed is too high to exceed the standard. If the rated speed of the motor is exceeded, the motor will be overloaded, and in severe cases, the motor will be damaged, which not only affects the normal operation of the water pump, but also reduces the working life of the water pump. [0003] In...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing water pumps use the motor to drive the impeller to rotate, which is used to transport liquid or pressurize the liquid. Different types of water pumps have a certain rated power when they work, and there is a standard value for the motor speed. After running for a long time, its speed will often change, sometimes it will be low, sometimes it will be high. The low speed of the motor will cause the lift of the liquid to be transported to be substandard, or the pressurization of the liquid is not enough, and the motor speed is too high to exceed the standard. If the rated speed of the motor is exceeded, the motor will be overloaded, and in severe cases, the motor will be damaged, which not only affects the normal operation of the pump, but also reduces the working life of the pump.

[0003] In the prior art, the method of adjusting the speed of the water pump motor is mostly to sample the running speed of the motor and then make adjustments. Specifically, it picks up the low-speed signal after being decelerated by the gearbox, and then adjusts the running speed of the motor. When it is found that the motor speed is too high or too low to deviate from the predetermined standard speed through the sampling signal, the actual speed of the motor has deviated greatly from the standard speed at this time, resulting in a low timely response speed of the automatic speed adjustment system of the motor. The speed of the motor cannot be adjusted in time

[0004] In addition, traditional water pumps often have a nameplate attached to it, which is marked with the performance standard parameters of the pump, such as lift, flow rate, and the capacity of the equipped motor. Often due to long-term exposure, the marked parameter information will gradually become blurred, and even the nameplate will be dropped and lost, which directly affects the use of later staff. In addition, in an environment where there are many pumps working at the same time Internally, if a certain water pump is working abnormally and requires maintenance personnel to perform maintenance and repair, the staff often need to spend time checking and searching among many water pumps, which takes a lot of time

Images