The flow rate and speed of a large resistant screw pump are linearly related. Compared to low-speed screw pumps, high-speed screw pumps can increase flow rate and head, but their power is significantly increased. High speed accelerates the wear between the rotor and stator, which inevitably leads to premature failure of the screw pump. Moreover, the length of the stator and rotor of high-speed screw pumps is very short, which is prone to wear and tear, thus shortening the service life of the screw pump. By using a reducer or a continuously variable speed mechanism to reduce the speed and keep it within a reasonable range of less than 300 revolutions per minute, the service life can be extended several times compared to high-speed screw pumps.

Due to the special geometric shape of these two components, they form separate sealed chambers, and the medium flows uniformly in the axial direction. The internal flow velocity is low, the volume remains constant, and the pressure is stable, so there will be no vortex or agitation. The output pressure of each stage pump is 0.6MPa, the head is 60m (for clean water), and the self-priming height is generally 6m. It is suitable for conveying medium temperatures below 80 ℃ (special requirements can reach 150 ℃). Due to the selection of multiple elastic materials for the stator, this pump has characteristics that general pump types cannot handle for transporting high viscosity fluids and media containing hard suspended particles or fiber media. Its flow rate is proportional to the rotational speed. Transmission can be achieved directly through couplings, or through devices such as variable speed motors, V-belts, gearboxes, etc. This screw pump has few parts, compact structure, small volume, and easy maintenance. The rotor and stator are vulnerable parts of this pump, and the structure is simple and easy to assemble and disassemble. The working principle of a single screw pump is that when the screw pump is working, the liquid is sucked in and enters the sealed space surrounded by the threads and pump casing. When the active screw rotates, the sealing volume of the screw pump is increased by the compression of the screw teeth, and moves axially. Due to the constant rotation of the screw, the liquid outflow flow rate is also uniform. The characteristics of a single screw pump are: small losses and good economic performance. High and uniform pressure, uniform flow rate, high speed, capable of direct connection with the prime mover.

Due to the special geometric shape of these two components, they form separate sealed chambers, and the medium flows uniformly in the axial direction. The internal flow velocity is low, the volume remains constant, and the pressure is stable, so there will be no vortex or agitation. The output pressure of each stage pump is 0.6MPa, the head is 60m (for clean water), and the self-priming height is generally 6m. It is suitable for conveying medium temperatures below 80 ℃ (special requirements can reach 150 ℃). Due to the selection of multiple elastic materials for the stator, this pump has characteristics that general pump types cannot handle for transporting high viscosity fluids and media containing hard suspended particles or fiber media. Its flow rate is proportional to the rotational speed. Transmission can be achieved directly through couplings, or through devices such as variable speed motors, V-belts, gearboxes, etc. This screw pump has few parts, compact structure, small volume, and easy maintenance. The rotor and stator are vulnerable parts of this pump, and the structure is simple and easy to assemble and disassemble. The working principle of a single screw pump is that when the screw pump is working, the liquid is sucked in and enters the sealed space surrounded by the threads and pump casing. When the active screw rotates, the sealing volume of the screw pump is increased by the compression of the screw teeth, and moves axially. Due to the constant rotation of the screw, the liquid outflow flow rate is also uniform. The characteristics of a single screw pump are: small losses and good economic performance. High and uniform pressure, uniform flow rate, high speed, capable of direct connection with the prime mover.

G-type single screw pump conveying method:

Performance parameters at constant speed:

1. The above performance parameters are experimental data obtained during the room temperature water test; 2. For different media and speeds, performance parameters will vary, with flow rate values inversely proportional to concentration and viscosity, and directly proportional to speed; 3. Users must choose the type of pump based on usage requirements, the condition of the conveying medium, and selection principles, or consult with our company's technical department to determine the type of pump. 4. For water coal slurry pumps, the transmission form is gear speed regulation matched with electromagnetic speed regulation motors or mechanical continuously variable speed motors, and the flow rate is infinitely adjustable with the change of speed.