| 摘要 |
<p>A coil assembly for miniature solenoid valves, such as size SAE-6 valves, includes a flux tube 50 which passes through the hollow core 24 of the coil assembly 28. The flux tube 50 is formed against a shoulder 48 of a coupling member 40 by using the "Taumel" orbital head forming technique in which a forming tube orbits around the end of the flux tube 50 to form a flange 60 which bears against the shoulder 48. A flux washer 34 is disposed adjacent the coil 20 and is held tightly thereagainst by the flux tube 50 to help linearize magnetic force exerted upon energizing the coil 20. In order to facilitate stroking the destroking the solenoid valve, the tank ports 120 close slightly before the pressure ports 124 are opened when stroking and slightly after when destroking. The coil 20 is designed to saturate the magnetic circuit early to diminish the effect of coil heating and resultant force loss at a given stroke displacement. <IMAGE></p> |
