| 摘要 |
926,937. Gas turbine plant; balancing. ROVER CO. Ltd. Nov. 3, 1961 [Nov. 8, 1960], No. 38263/60. Classes 110 (3) and 122 (3). [Also in Group XXVIII] In a swash plate fuel pump (see Group XXVIII) for a variable-speed gas turbine engine and having a revolving cylinder block 27, Fig. 6, driven by the engine, the block engages a stationary valve face 23 with arcuate inlet and outlet ports, the outlet port being divided into two portions 2 and 3, Fig. 2, which deliver into separate burner supply conduits. Outlet portion 2 is longer and delivers more fuel than portion 3. The delivery from outlet 2 is also connected to centrifugally-actuated valves 7 and 8, Fig. 2 (40 and 44 in Figs. 6 and 8) which open when predetermined engine speeds are exceeded to by-pass the delivery from outlet 2 to the pump inlet. Valve 7 is set to limit the maximum engine speed and valve 8 is manually controlled through pistons 54 and 48, Figs. 6 and 8 (8a in Fig. 2) to control the engine speed up to said maximum. In one arrangement, Fig. 2, when increase in speed is required, valve 8 is held closed so that both ports 2 and 3 deliver to burner 11. When the desired speed is reached or deceleration is required, valve 8 is released and delivery from port 2 by-passed, check valve 9 closing and only port 3 delivering to burner 11. For further reduction in fuel supply a valve 10 may be opened to by-pass part of the delivery from port 3. As an alternative to valve 10 and to compensate for altitude changes, the pump delivery may be varied by rotating the swash plate 31 relative to ports 1, 2, 3 thereby varying the relative outputs of these ports. A balance weight 43 is provided on the revolving cylinder block 27, Fig. 8. Specification 819,463 is referred to.
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