About Hydraulic Oil Pump Mechanical Seals
Hydraulic oil pump mechanical seals are key components in hydraulic systems. They are used to prevent fluid leakage and protect the system from the intrusion of contaminants to ensure efficient and reliable operation of the hydraulic system.
Advantages
Hydraulic oil pump mechanical seals have the following advantages:
■ Excellent sealing performance
Mechanical seals can provide reliable sealing under extremely high working pressure and effectively prevent leakage of liquid in the pump. This ensures the safety and operational stability of the hydraulic system.
■ High-speed operation resistance
The structural design of the mechanical seal can withstand the centrifugal force under high-speed conditions of the hydraulic pump, avoiding leakage problems caused by high-speed operation. This helps to extend the service life of the pump.
■ Strong wear resistance
The mechanical seal has excellent wear resistance due to the selection of special sealing materials and surface treatment processes. It can operate reliably for a long time even under high pressure and high speed conditions.
■ Wide temperature adaptability range
The mechanical seal can maintain good sealing performance in a wide temperature range of the hydraulic system and has strong adaptability.
■ Excellent anti-pollution performance
The precise sealing structure can effectively block external dust, impurities and other pollutants from entering the hydraulic system to ensure the cleanliness of the system.
■ Easy to maintain and replace
The modular design makes it very convenient to disassemble and replace the mechanical seal, and the maintenance cost is low.
Application Scenarios
1. Engineering machinery field
Hydraulic systems are widely used in large-scale engineering machinery such as excavators, loaders, and bulldozers, and mechanical seals are one of their key components.
2. Automobile manufacturing industry
The steering system, braking system, suspension system, etc. of automobiles all rely on hydraulic technology, and mechanical seals play an important role in them.
3. Aerospace field
Hydraulic systems are widely used in aerospace equipment such as aircraft and rockets, and have extremely high requirements for sealing performance. Mechanical seals are key components.
4. Shipbuilding industry
Various hydraulic power systems on ships, such as steering and lifting, also generally use hydraulic oil pumps and their mechanical seals.
5. Industrial machinery and equipment
Injection molding machines, metal calenders, metallurgical equipment and other industrial machinery widely use hydraulic technology, and mechanical seals are an important part of them.
6. Wind power generation equipment
The hydraulic braking system and yaw system in wind turbines all use mechanical sealing technology.
In general, as long as it involves hydraulic systems, mechanical seals play an indispensable key role, ensuring the safe and stable operation of the entire hydraulic system.
Rubber Material Selection for Hydraulic Oil Pump Mechanical Seals
| Rubber material | Characteristics | Applicable conditions | Inapplicable conditions | Remarks |
| NBR (nitrile rubber) | Resistant to petroleum-based oils, fuels, wear and aging | High tensile strength Petroleum-based hydraulic oils, silicone greases, water and alcohols | Fuels with high aromatic content, certain polar solvents | Acrylonitrile content affects cold resistance and oil resistance |
| FKM (fluororubber) | Resistant to high temperature, ozone, chemicals, weather, low air permeability | Applications requiring high heat and chemical resistance | Ethylene glycol-based brake fluids, polar solvents, superheated steam | — |
| EPDM (ethylene propylene diene monomer) | Heat resistance, ozone resistance, weather resistance, water vapor resistance, electrical insulation | Hot water, water vapor, ozone environment | Oil resistance is not as good as NBR and FKM | Commonly used in applications in contact with water |
| HNBR (hydrogenated nitrile butadiene rubber) | Better heat resistance and chemical resistance than NBR | Hydraulic oil and chemical media at high temperatures | Polar solvents and strong oxidants | Provides better performance than NBR |
| ACM (acrylic rubber) | Excellent heat resistance and oil resistance, good mechanical properties | Hydraulic oil and lubricating oil at high temperatures | Strong acids, strong bases and polar solvents | — |
| SIL (silicone rubber) | Excellent heat resistance, ozone resistance, electrical insulation | High temperature environment, ozone environment | Petroleum products and fuels | — |
Production Process
1. Parts processing
Sealing rings, support rings and other parts are usually manufactured by precision injection molding or CNC turning to ensure dimensional accuracy and surface quality.
2. Heat treatment
Metal parts such as support rings need to be heat treated to improve surface hardness and wear resistance. Usually, heat treatment processes such as quenching and tempering are used.
3. Surface treatment
Key surfaces such as sealing surfaces need to undergo surface modification processes such as chrome plating and nitriding to further improve wear resistance and finish.
4. Assembly
Precisely assemble the sealing rings, support rings, sleeves and other components together to ensure that the components are coordinated. The assembly process requires strict control of dimensional tolerances.
5. Dynamic balance
The entire sealing device must maintain good dynamic balance when running at high speed. Special dynamic balance detection and adjustment will be carried out.
6. Inspection
The finished sealing device will undergo strict performance testing, including leakage testing, pressure resistance testing, friction factor testing, etc., to ensure product quality.
7. Packaging
Finally, the qualified sealing devices will be professionally packaged to ensure that they will not be damaged during transportation and storage.
The entire production process uses precise manufacturing technology and strict quality control measures to ensure that hydraulic oil pump mechanical seals products can operate stably and reliably for a long time under harsh working conditions.
If you are interested in hydraulic oil pump mechanical seals, please contact us.
