5results about How to "Reduce radial force" patented technology

The invention provides an anti-seismic diesel engine fire pump set, which relates to the technical field of fire fighting equipment and comprises an anti-seismic diesel engine fire pump set base, a diesel engine and a fire pump, the anti-seismic diesel engine fire pump set base comprises a base frame and at least one reinforcing steel channel main beam arranged on the base frame. The diesel engine main engine is fixedly mounted on the anti-seismic diesel engine fire pump set base through the integrated base; the fire pump is fixedly installed on the anti-seismic diesel engine fire pump set base through pump feet and comprises a double-volute pump body fixedly installed on the pump feet, a pump cover connected with the double-volute pump body and located above the double-volute pump body, a pump shaft penetrating through the double-volute pump body and the pump cover and a double-suction impeller installed on the pump shaft. The anti-seismic performance of the diesel engine fire pump set is improved, and normal operation of the whole pump set under the earthquake working condition is guaranteed. According to the double-volute pump body and the double-suction impeller, the axial force generated when the impeller operates can be self-balanced, meanwhile, the radial force of the impeller is reduced, and the pump shaft operates more stably.

The utility model discloses a center frame top head, which relates to the technical field of machine tool equipment and is characterized in that a mounting groove is arranged on the end surface of one end of a mounting seat, a support roller and a tapered roller bearing which rotate in the same direction are sequentially and detachably mounted between two inner side walls of the mounting groove from inside to outside, and a shaft sleeve is sleeved on the outer ring surface of the tapered roller bearing; one side of the shaft sleeve abuts against and is matched with the supporting roller, the other side of the shaft sleeve extends out of the mounting groove, limiting pieces used for horizontally limiting the tapered roller bearing are arranged between the two end faces of the tapered roller bearing and the inner side wall of the adjacent mounting groove, and a connecting base connected with a machine tool is arranged on the end face of the other end of the mounting base. According to the utility model, the high stability of the center frame ejector head is realized, and great convenience is provided for subsequent overhaul and maintenance.

The utility model discloses elevator speed governor action speed detection platform, including quick locking assembly, quick locking assembly includes concave strip and convex strip, the outer ring of main shaft rod four -around fixed installation concave strip, the outer ring of external connection axle four -around fixed connection convex strip, convex strip protruding end activity joint concave strip groove end, quick locking assembly still includes rectangular groove, dismounting spring, clamping block and clamping groove, the middle part of convex strip is seted up rectangular groove, and dismounting spring and clamping block are connected in rectangular groove, and clamping block is located above dismounting spring, and the middle part of concave strip is seted up clamping groove, and clamping block is connected in clamping groove. The utility model can guarantee the concentricity of main shaft rod and external connection axle through the accurate matching of geometric shape, reduce the eccentric problem of shafting caused by bolt hole error or uneven assembly, reduce additional radial force and vibration, make motor output speed more stable, thereby improve the precision of speed governor action speed detection.

The application relates to the technical field of centrifugal pumps, in particular to an energy-saving centrifugal pump with low radial force, which comprises a pump body, a pump shell is fixedly arranged on the pump body, a pump shaft is installed in the pump shell, an impeller is installed on the pump shaft, an auxiliary shaft support mechanism is also installed in the pump shell, the pump shaft is assisted and supported through the auxiliary shaft support mechanism, the auxiliary shaft support mechanism is connected with a self-locking assembly, the auxiliary shaft support mechanism drives the self-locking assembly to move, thereby realizing the locking of the auxiliary shaft support mechanism, the auxiliary shaft support mechanism is also connected with a wheel body fixing mechanism, an auxiliary shaft support frame is arranged in the pump shell, when the impeller is installed on the pump shaft, the impeller can drive the auxiliary shaft support frame to move, thereby making the auxiliary shaft support frame contact with the pump shaft from the periphery of the pump shaft, so that the pump shaft can be well assisted and supported, even if the bearing is worn, the pump shaft will not appear the phenomenon of deviation, and the support stiffness of the pump shaft is fully ensured.

The invention relates to a sealing assembly and a rolling bearing. The sealing assembly is annular as a whole and comprises a framework with a radial inner end; the sealing body is attached to the framework, a dynamic sealing lip inclining towards the first axial side is arranged at the position, at the radial inner end of the framework, of the sealing body and used for abutting against a bearing inner ring in a dynamic sealing mode, and a plurality of grooves spaced in the circumferential direction are formed in the position, at the second axial side, of the lip edge of the dynamic sealing lip. The groove divides the lip edge of the dynamic sealing lip into a thin lip edge and a thick lip edge in the circumferential direction. The groove is formed in the lip edge of the dynamic sealing lip, so that when the lip edge of the dynamic sealing lip abuts against the bearing inner ring in a dynamic sealing mode, the lip edge of the dynamic sealing lip is easier to stretch in the circumferential direction, the banding force on the bearing inner ring is reduced, the radial force on the bearing inner ring is reduced, abrasion between the dynamic sealing lip and the bearing inner ring is reduced, and the service life of the dynamic sealing lip is prolonged. The dynamic sealing lip is prevented from being separated from the bearing inner ring due to abrasion, the service life of the sealing assembly is prolonged, and the sealing assembly can conduct electricity for a long time.