| 摘要 |
The present invention provides a motor suitable for use in down-hole drilling applications. The motor is a wing motor and comprises a generally tubular casing (1, 2) and a rotor (4) mounted for rotation therein and substantially radially spaced therefrom so as to define a chamber (18) therebetween. The casing (1, 2) is provided with angularly spaced apart inlet and outlet means (19, 20) for ingress of pressurised working fluid from inlet conduit means (19a) in the casing (1, 2) into the chamber (18) and egress of said fluid from within said chamber, to outlet conduit means (20a) separated from the inlet conduit means (18) by wall means (21). The casing (2) has generally radially extending wall means (3) extending substantially into contact with said rotor (4) at an angular position between the outlet and inlet means (20, 19). The rotor (4) has a plurality of angularly spaced apart wing means (15). One of said radially extending wall means (3) and said wing means (15) is displaceable from a generally radially projecting configuration in substantially sealing engagement with said rotor (4) or said casing (1, 2), respectively, to a generally retracted configuration when traversing the other of said radially extending wall means (3) and wing means (15). The wing means (15) and inlet and outlet means (19, 20) are formed and arranged and relatively angularly disposed so that a flow of pressurised fluid into said chamber (18) acts against an upstream side (15c) of a first wing means (15') so as to rotate said rotor (4) while venting fluid from its downstream side (15e) until said wing means (15') traverses said outlet means (20) and a second said wing means (15'') traverses the inlet means (19) whereupon the process is repeated. The invention also provides drilling and coreing apparatus provided with a wing motor of the invention. |
