Key technical parameters of hydraulic cylinder rotary joint seals
The key technical parameters of hydraulic cylinder rotary joint seals include pressure rating, temperature range material characteristics, etc., as follows:
1. Withstand voltage grade
Hydraulic rotary joints are typically rated between 10 bar and 35 MPa, depending on the design and application. For example, some models of rotary joints can reach a maximum pressure of 35 MPa.
Some products support high-voltage applications, such as 10K~15K PSI (approx. 68.9~103.4 bar).
2. Temperature range
Seals operate in a wide range of temperatures, from low temperatures of -40°C to high temperatures of 120°C and beyond. For example, some seals are suitable for environments from -40°C to 120°C.
Specially designed seals can withstand higher temperatures, such as 100°C or even 200°C (O-ring material replacement required).
3. Material characteristics
Seal materials need to be resistant to high pressures, abrasion, corrosion, and high temperatures. Commonly used materials include nitrile rubber (NBR), fluoroelastomer (FKM), polyurethane (PU), and polytetrafluoroethylene (PTFE).
For example, RI polyurethane rotary seals are suitable for working pressures of 350 bar and operating temperatures from -35°C to 110°C.
In special applications, such as seals in contact with cutting oils, fluoroelastomers are used to prevent corrosion.
4. Other key parameters
Speed: The speed of the rotary joint ranges from low speed (e.g. 0.5m/s) to high speed (e.g. 800r/min).
Number of channels: The common channel configuration is 4 in and 4 out.
Service life: The service life of high-quality rotary joint seals can reach more than 80 million times.
The key technical parameters of hydraulic cylinder rotary joint seals cover many aspects such as pressure resistance level, temperature range, and material characteristics, which directly affect their performance and applicability.
Application scenarios of rubber seals in hydraulic systems
Rubber seals are widely used in hydraulic systems, mainly including the following aspects:
1. Hydraulic pump seal
Rubber seals are widely used in key parts such as shaft seals and end cap seals of hydraulic pumps to ensure that the hydraulic pump does not leak during high-pressure and high-speed operation, and to improve the stability and efficiency of the system.
2. Hydraulic valve seal
The rubber seal is used to control the key components of the pressure and flow of the hydraulic system, such as the hydraulic valve, which can effectively prevent liquid leakage and ensure the normal operation of the system.
3. Hydraulic cylinder seal
Rubber seals play a key role in hydraulic cylinders to prevent hydraulic oil leakage and ensure the normal operation of hydraulic cylinders. Common sealing forms include O-rings, Y-rings, and U-rings.
4. High-pressure pipeline sealing
In chemical, petroleum, natural, gas, and other industries, rubber seals are used in high-pressure pipeline connections and valves to prevent medium leakage and ensure production safety and environmental protection.
5. Automobile engine seal
Rubber seals are used in automobile engines to seal coolant, engine oil, and other liquids to prevent leakage and protect the normal operation of the engine.
6. Industrial machinery and equipment seals
Rubber seals are widely used in various industrial equipment and machinery, such as pumps, valves, pressure vessels, etc., to prevent medium leakage, protect the normal operation of equipment, and prolong service life.
7. Dustproof and oil seal
Rubber seals are also used for dust and oil seals, such as dust rings are used to prevent dust pollution, and oil seals are used for rotary seals of mechanical equipment.
Rubber seals play a vital role in hydraulic systems due to their excellent sealing performance, pressure resistance, wear resistance, and corrosion resistance. Through reasonable selection and maintenance, the stability and reliability of the hydraulic system can be significantly improved
