Whether it’s airplanes, rockets, tanks, submarines, drilling rigs, mining operations, trains, ships, or even daily life, electric pumps are needed everywhere, and pumps are running everywhere. This is why pumps are classified as general-purpose machinery, a major product category in the machinery industry. For example, in the production of chemical and petroleum products, raw materials, semi-finished products, and finished products are mostly liquids. Transforming raw materials into semi-finished and finished products requires complex processes, and electric pumps play a crucial role in these processes by transporting liquids and providing the pressure and flow for chemical reactions. Furthermore, electric pumps are also used in many devices to regulate temperature.
Selection Method
Depending on the pump’s operating requirements, the type of motor (such as starting, braking, reversing, speed regulation, or frequency regulation) can be selected. The motor power should be chosen based on the pump’s load, speed regulation, frequency regulation, frequency of starting, temperature rise, and starting torque. Selecting an excessively powerful motor will reduce pump efficiency, waste energy, and increase costs. Therefore, a suitable coefficient should be selected based on the motor type and power rating.
The motor’s structure is selected based on the pump unit’s operating temperature, altitude, humidity, wind and sand, rain, insulation requirements, the medium being pumped, cooling method, and installation method. The motor’s voltage rating and type are determined based on the voltage, frequency, and power factor of the application. The motor’s speed is selected based on the pump’s parameter requirements. Finally, the motor is chosen based on factors such as pump reliability, the complexity of the application, energy-saving requirements, and cost considerations.
Therefore, since pumps are often used in harsh environments, the requirements for motors are also high, such as waterproofing, corrosion resistance, temperature control, and ease of maintenance. In general, selecting the right motor for an electric pump is not an easy task and requires rigorous evaluation based on the operating conditions.
Selection Recommendation
The first recommended model is the KM-4140-5029, a brushed DC motor. Brushed DC motors have a wide range of applications, and current technology allows them to be used in electric pumps operating in harsh environments. The 4140 is a relatively large miniature DC motor. Its housing diameter reaches 59mm, its housing length is 87.5mm, its shaft diameter is 8mm, and its total weight is 860g. However, the KM-4140-5029 boasts outstanding performance.
The second recommended model is the RS-997SH-4547RD. The 9-series motors are also large-size miniature brushed DC motors. The 997 motor is a high-power miniature motor with high speed and torque. For example, this RS-997SH-4547RD, under a 24V operating voltage, has a load torque of 1190 g⋅cm, a load speed of 2662 rpm, and a load current of 1810 mA. The dimensions of the 997 motor are: casing length 85mm, diameter 51.8mm, shaft diameter 6.35mm, and a total weight of 640g. This motor can be used in various industries such as diaphragm pumps and agricultural pumps, and has advantages such as low cost, high power, stability, and simple maintenance.
Electric pumps have a wide range of applications and types. Therefore, due to space limitations, motors for many other applications, such as automotive wiper pumps, air pumps, paint spray pumps, ship hull pumps, medical pumps, peristaltic pumps, and submersible pumps, are not recommended here. Kinmore Motor possesses the capability to design and develop electric pumps for various applications and has 20 years of manufacturing experience. Custom inquiries are welcome!
