IMPROVED AIR WEFT INSERTION NOZZLE CONTROL SYSTEM

摘要

the actuation of a nozzle used for the propulsion of the thread in a weaving system introduced by air to weft control using a single servo rotary valve (31) with a wholee of orifices (94, 100, 103, 105,107) adapted to coincide during the rotation of the valve alternately to a source of pressurized air and the atmosphere to pressurize and the event alternately a room filote (170) for opening and closing the nozzle.preferably, the rotary valve (31) includes a rotary valve (75) surrounded by a sleeve material permeable seems to form a pneumatic level for the drawer.the actuation of the nozzle is determined by the movement of a diaphragm valve (80) to and withdrawal from the opening of a inlet chamber from the nozzle (156) under the control of the pression of the pilot chamber, and the diaphragm is either of two separate u-shaped convolutions annulairement (212)214) leading to the inside of the chamber for supplying air to the nozzle such that the movement of the diaphragm during the opening and closing action of a shift to or flexprogressive liberalization as the side walls of the carton and to closely run in order telescopique one over the other.preferably, the two apertures in the same convolutions (180,210) were prepared and directly against the axially space being exposed to the nozzle supply pressure and the other is the feel of the room.very advantageous.in the space between the diaphragms is made (224) to maintain the air pressure in the space of the conditions and areas of aircraft are provided to prevent the emprisonnement air resistant to bending of one or the other of the apertures.