The cam rotor pump with gear reducer is a common positive displacement pump. The following is its related introduction:
Working Principle
The cam rotor pump is driven by a pair of external synchronous gearboxes, which drives two rotors that move synchronously. Driven by the drive shaft, the rotors rotate synchronously in the opposite direction, thus changing the volume of the pump, forming a relatively high vacuum degree and discharge pressure, and realizing the transportation of the medium.
Structural Characteristics
Rotors and Gears: Two specially shaped cam rotors are used, maintaining a certain clearance between each other without direct contact. There is no wear, the operation is stable, the noise is low, and the service life is long. The synchronous gearbox ensures the precise synchronous rotation of the rotors.
Pump Body and Sealing: The pump body has a compact structure, and the internal flow channel is reasonably designed, which can effectively reduce the flow resistance of the medium. It has good sealing performance and usually adopts mechanical seals or packing seals and other methods to prevent medium leakage.
Performance Advantages
Transporting High Viscosity Media: It is especially suitable for transporting media with high viscosity, concentration and containing particles, such as heavy oil, crude oil in the petrochemical industry, chocolate, condensed milk in the food industry, ointment, extract in the pharmaceutical industry, etc. The viscosity of the medium can be as high as 2.5 million cp, and the slurry with a solid content of up to 60% can also be smoothly transported.
Precise Flow Control: As a positive displacement pump, the transportation flow can be controlled relatively precisely, and it can also be conveniently made into a variable pump to meet the flow requirements under different working conditions.
Strong Self-priming Ability: It has a relatively strong self-priming ability and can start self-priming without priming the pump. It can suck various media, including those containing gas.
Energy-saving and High Efficiency: The operating speed is low, generally between 200 rmp and 400 rmp. Compared with screw pumps, gear pumps, etc., the energy saving is more than 30%, which can significantly reduce the energy consumption cost in the long-term operation.
Smooth Operation: Due to the non-contact between the rotors and the characteristics of low-speed operation, the pump has low vibration and noise during the operation process, reducing the impact on the working environment and also reducing the maintenance requirements of the equipment.
Application Fields
Petrochemical Industry: It is used to transport various high-viscosity materials such as crude oil, heavy oil, oil sludge, asphalt and slurries with a relatively high solid content.
Daily Chemical Industry: It can transport various daily chemical products such as alcohol ethers, glycerol, facial cleansers, cosmetics.
Fine Chemical Industry: It is applicable to the transportation of fine chemical materials such as dyes, paints, printing and dyeing auxiliaries, adhesives.
Food Industry: It can transport food raw materials and finished products such as chocolate, condensed milk, yogurt, honey, jam, meeting the requirements of food hygiene.
Pharmaceutical Industry: It can be used to transport various pharmaceutical products such as ointments, extracts, pharmaceutical emulsions, syrups, meeting the requirements of pharmaceutical grade (GMP) specifications.
Paper-making Industry: The cam rotor pump can also be selected for the transportation of pulp, adhesives, auxiliaries, etc.
Environmental Protection Field: It is widely used in the transportation and treatment of sewage, sludge, chemicals, suspensions, fertilizer solutions, etc.
Precautions for Selection
Medium Characteristics: According to the viscosity, concentration, particle size and corrosiveness and other characteristics of the medium to be transported, select the appropriate rotor material, sealing form and pump body material.
Flow and Pressure: Based on the flow and pressure requirements required by the actual production process, determine the model and specification of the pump to ensure that the pump can meet the transportation requirements of the system.
Rotational Speed Requirements: Combine the characteristics of the medium and the process requirements to reasonably select the rotational speed of the pump. Too low a rotational speed may lead to insufficient flow, and too high a rotational speed will aggravate wear and reduce efficiency.
Installation and Maintenance: During installation, ensure that the foundation of the pump is firm and level, the inlet and outlet pipelines are connected correctly, and sufficient maintenance space is reserved. In daily maintenance, regularly check the wear conditions of key components such as rotors, gears and seals, and replace the wearing parts in a timely manner.
