发明申请
US20110240893A1 Valve Actuator Having Synchronous Motor Having Plastic Bushings
审中-公开
具有塑料衬套同步电动机的气门执行机构
- 专利标题: Valve Actuator Having Synchronous Motor Having Plastic Bushings
- 专利标题(中): 具有塑料衬套同步电动机的气门执行机构
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申请号: US12753181申请日: 2010-04-02
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公开(公告)号: US20110240893A1公开(公告)日: 2011-10-06
- 发明人: William P. Windgassen
- 申请人: William P. Windgassen
- 申请人地址: US IL Loves Park
- 专利权人: SCHNEIDER ELECTRIC BUILDINGS, LLC
- 当前专利权人: SCHNEIDER ELECTRIC BUILDINGS, LLC
- 当前专利权人地址: US IL Loves Park
- 主分类号: F16K31/04
- IPC分类号: F16K31/04 ; F16K51/00 ; H02K21/24
摘要:
A synchronous motor and a valve having a valve actuator and valve assembly is provided. The valve actuator includes the synchronous motor. The synchronous motor utilizes a magnetic coil, a stator and a rotor to generate rotational movement to drive the valve member for the valve assembly. The valve has a normal state in which the valve is maintained when power is not supplied to the motor. The valve has a non-normal actuated state when power is supplied to the motor. The motor is stalled in the non-normal state to maintain the valve in that state. The rotor includes a rotor shaft that passes through a magnetic hub of the stator. The rotor shaft is supported by a plurality of plastic and/or nylon bearings to prevent corrosion therebetween when the rotor shaft and bearings remain in a substantially fixed orientation for an extended period of time.