3results about How to "Achieve multiple seals" patented technology

The application relates to the field of stainless steel pipe connection, and discloses a stainless steel pipe connection sealing mechanism, which comprises two stainless steel pipes and a connecting head arranged between the two stainless steel pipes. Inner thread assembly grooves are arranged on the left and right sides of the connecting head. A same communication hole is arranged on the inner wall of the side, where the two inner thread assembly grooves are close to each other. The ends, where the two stainless steel pipes are close to each other, respectively penetrate through the corresponding inner thread assembly grooves and extend into the communication hole. Bearings are fixedly sleeved on the two stainless steel pipes. The outer rings of the two bearings are fixedly sleeved with outer thread sleeves. The application has the following advantages and effects: multiple sealing between the two stainless steel pipes and the connecting head can be realized, the sealing performance of the connection part of the two stainless steel pipes can be ensured through the synergistic effect of multiple sealing, the omnibearing sealing effect is realized, and the application is suitable for fluid conveying scenes with strict sealing requirements.

The utility model provides a kind of explosion-proof switch of double-layer sealing structure, including lower explosion-proof shell and upper explosion-proof shell, and the lower explosion-proof shell is detachably fixed and installed between upper explosion-proof shell, the top of the lower explosion-proof shell is fixed with outer pressure side, the inner wall of the outer pressure side is fixed with inner pressure side, annular pressure groove is formed between the outer pressure side and inner pressure side, and the bottom of the upper explosion-proof shell is fixed with outer fixed ring.The utility model's lower explosion-proof shell and upper explosion-proof shell are nested between annular pressure groove formed between outer pressure side and inner pressure side and inner fixed ring, outer fixed ring is nested with outer pressure side, and sealing ring is set in nesting part, multiple sealing is realized, meanwhile, the groove bottom of annular pressure groove is provided with oil injection flow channel communicated with outside, can realize injecting sealing oil to annular pressure groove inside, realize oil seal, effectively improve the sealing performance of the explosion-proof switch.

This utility model belongs to the field of electric motors, specifically a multi-sealing structure for an electric motor including a motor, a pressure cover, and a rotor. The pressure cover is fixed to the motor with bolts. The rotor is rotatably disposed within the motor cavity, and its end penetrates the pressure cover. A pressure cover shaft seal is embedded on the surface of the pressure cover. The rotor is inserted into the inner cavity of the pressure cover shaft seal. A limit ring is integrally formed on the surface of the motor. A double-sided shaft seal is movably disposed within the inner cavity of the limit ring. The double-sided shaft seal consists of an outer shaft seal ring, an inner shaft seal ring, and a partition plate. The outer and inner shaft seal rings are connected by the partition plate, which is located in the middle of the outer and inner shaft seal rings. This utility model achieves multiple seals for the motor by combining the double-sided shaft seal with the pressure cover shaft seal, which improves the motor's sealing performance during use. Simultaneously, lubricating grease flows out from the oil outlet hole, lubricating the rotor surface and the inner shaft seal ring, reducing wear on the inner shaft seal ring, and extending the service life of the double-sided shaft seal.