| 摘要 |
<p>An electrically-operated valve for regulating the flow of a fluid comprising a valve seat assembly, a rotor assembly, and a valve needle and screw assembly. The valve seat assembly comprises a valve seat (12) provided with a valve cavity (121), and a valve core seat fixed to the valve seat (12) and having a valve port (113). The valve needle and threaded stem assembly comprises a threaded stem (23) and a valve needle (21) driven by the threaded stem. The electrically-operated valve also comprises a nut assembly. The nut assembly comprises a nut (32) and a connection member (31). The nut is a hollow, ring-like structure and comprises a positioning and orientation portion (80) near the valve seat assembly, a nut connection portion (60) near the rotor assembly, and a supporting portion (70) stabilizing the connection member. The electrically-operated valve makes it easy to ensure coaxiality between the nut and valve needle and threaded stem assembly and the valve core seat and valve opening. This helps avoid the problem of the valve port not being tightly sealed as well as the occurrence of eccentric wear, and improves the reliability of the electrically-operated valve.</p> |
