94results about How to "Reduce concentricity" patented technology

A balance valve comprises a valve body, an end cover, a plug, a valve core, a valve seat and a piston, wherein the end cover and the plug are respectively connected with the two ends of the valve body in a sealing mode. A third oil port is formed in the rear end of the plug, a filter screen and a damper are arranged at the third oil port, and the valve seat is arranged in a first cavity of the valve body and located between a first oil port and a second port. The front section of the valve core is matched in the end cover in a sliding mode, the rear section of the valve core is matched in a through-hole of the valve seat, an inner cavity which is axially penetrating is formed in the valve core, a steel ball which is matched with the inner cavity of the valve core is arranged in the valve core, a boss for axially limiting the steel ball is arranged in the inner cavity of the valve core, a first spring which is abutted against the steel ball is arranged in the inner cavity of the valve core, and the other end of the first spring is abutted in the end cover. The piston is matched in a second cavity in a sliding mode, the ladder end of the piston penetrates a cavity wall between the first cavity and the second cavity and is matched in the inner cavity of the valve core in a sliding mode, and a one-way throttling device is arranged at the rear end of the piston. The balance valve is simple in structure, compact in size and stable in working.

In a device on a drafting system for textile fiber slivers with weighting of the upper rolls of the drafting system which comprises roll pairs arranged one behind the other, the pairs having lower and upper rolls, the rotating journals at the ends of the upper roll are mounted by means of bearing elements and the bearing elements each have at least one rolling-element bearing having an immovable outer housing (outer ring) and an internal rotational body (inner ring). In order to provide a structurally simple way in which the bearing housings can be mounted on or removed from the presser roll in a simple, quick and reliable manner, the bearing elements are in the form of rolling-element bearings and there is a coupling between the journal and the rotational body.

The invention discloses an electric main shaft with a mouse cage type motor stator cooling structure, comprising a main shaft assembly, a motor stator, a motor rotor, a box body, a front bearing assembly and a rear bearing assembly, wherein the motor stator is sleeved in the box body; the motor rotor is sleeved on the main shaft assembly; the main shaft assembly is arranged in the motor stator and supported on the box body through the front bearing assembly and the rear bearing assembly; the box body is provided with a mouse cage type cooling passage used for cooling the motor stator; the front end of the box body is provided with a front bearing seat used for installing the front bearing assembly; the front bearing seat and the box body are cast into an integer; one end of the motor stator, which is close to the front bearing seat, is sleeved with a stator side ring, and the motor stator can act on the stator side ring from an inner hole of the front bearing seat through a cylinder tooling and be pushed out of the rear end of the box body. The electric main shaft with the mouse cage type motor stator cooling structure has compact structure, convenient disassembly and assembly andgood cooling effect.