OIL SUPPLY SYSTEM Russian patent published in 1996 - IPC

FIELD: automatic control of turbine units. SUBSTANCE: oil supply system has oil pumps 1,2, distributor 3 with main and auxiliary slide valves, switch 4 and relays 5,6. Slide valve 7 has stem 8 which is introduced into chamber 32 through opening in partition 13 of casing 10 of distributor 3. During operation of pumps 1 and 2 ground belts 71,72 of slide valves 69,70 are pressed to thrusts 73,74 in casings 75,76. Oil under pressure is fed through belt spaces 83,84 to chambers 28,51,33,52. Oil is delivered from main line 102 through belt spaces 29 into main line 108 and further through belt spaces 53 into main line 111 of reliable oil consumer, and from main line 103 through belt spaces 30 into main line 109 of periodically switched oil consumer. Chamber 32 is connected through belt spaces 54 to drainage line 112. When pump 1 is switched off, pump 2 369(70) is displaced downward till abutment against surface 99(100), covers window 91(94) and opens oil drainage from chamber 28 and chamber 51 (chambers 33 and 52) through window 93(95) into drainage line 112. Under oil pressure in chamber 51 (chamber 52) slide valve 47 is retained in position, in which it abuts against upper thrust of casing 48, slide valves 37 and 39 are biased to the left (to the right) till abutment against surface 26 (27), to open windows 36 (41) and close windows 38,46(39,45). As a result main line 102(103) is connected through belt spaces 29, main line 108, belt space 53 to main line 111 and through belt space 30 to main line 109, with drainage of oil from main line 109 through belt space 34 being cut off. In case emergency cut-off of pumps 1 and 2 takes place, oil pressure in chambers 51 and 52 is relieved and slide valve 47 is biased by spring 49 till surfaces 67 and 68 come into contact, windows 58,61 are cut off and slide valve 47 is connected through windows 60,63,64 and through belt spaces 53,54, 55 and window 43 to main line 110 of emergency working oil source. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 1 dwg