| 摘要 |
An electromechanical actuator (9, 9', 9", 9"') for controlling the delivery rate of reciprocating compressors, comprising: a movable rod (12, 12') designed to cooperate at one end with a suction valve (3) of a reciprocating compressor and at the other with a moving element (18) made of a magnetizable material; at least one chamber (17) in which said moving element (18) is housed and onto which at least one winding (29, 29') of an electromagnet positioned inside a seat (28) facing said chamber (17) protrudes, there being positioned between said winding (29, 29') and said chamber (17) at least one protective element (30, 30', 30") made of a non¬ magnetic material and provided with static sealing elements (31, 32) and designed to keep the winding (29, 29') of the electromagnet separated from the chamber (17) in which said moving element (18) is housed, characterized in that said protective element (30") made of a non-magnetic material comprises at least two series of static sealing elements (31, 32), a first series being positioned internally to the protective element and a second series being positioned externally to the protective element, with gas recovery holes (42, 42') being provided between said series of static sealing elements, and in that at least one hole (35) for connection to a gas bleeding and washing circuit is provided in said chamber (23). |
