Gas turbine lubrication system

Abstract

A gas turbine lubrication system relates to the technical field of gas turbines. The present invention aims to solve the problems of high lubricating oil consumption, unstable system operation, easy wear of equipment and poor safety in the existing lubricating system. The present invention comprises a first protective oil filter, a first centrifuge, a second centrifuge, a second protective oil filter, a main transmission case, a third protective oil filter, a front transmission case, a circulating oil tank, a lubricating oil cooler, a return oil filter, an oil supply filter, an air separator, a lower transmission case, lubricating oil accessories, an oil-gas separation box and a fourth protective oil filter. The lubricating oil accessories comprise a boost pump K pump, a return oil pump L pump, a return oil pump M pump, a return oil pump N pump, a return oil pump T pump and a return oil pump P pump. The present invention is used for gas turbine lubrication.

Description

Technical Field

[0001] The invention relates to the technical field of gas turbines, and in particular to a gas turbine lubrication system. Background Art

[0002] The gas turbine lubrication system is used to provide the gas turbine with appropriate lubricating oil to meet the lubricating and cooling requirements of the gas turbine during normal operation. When the gas turbine is working normally, lubricating oil needs to be supplied to the working surfaces such as bearings and gears to form a continuous oil film to take away the heat from friction and high-temperature parts, so as to maintain the parts within the normal operating temperature range and increase the service life of the parts. However, the existing lubricating system has high lubricating oil consumption, unstable system operation, easy to cause equipment wear, and poor safety. Summary of the invention

[0003] In order to solve the problems of high lubricating oil consumption, unstable system operation, easy wear of equipment and poor safety in the existing lubrication system, the present invention further proposes a gas turbine lubrication system.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] A gas turbine lubrication system comprises a first protective oil filter, a first centrifuge, a second centrifuge, a second protective oil filter, a main transmission case, a third protective oil filter, a front transmission case, a circulating oil tank, a lubricating oil cooler, a first filter, a second filter, an air separator, a lower transmission case, a lubricating oil accessory, an oil-gas separation box and a fourth protective oil filter, wherein the lubricating oil accessory comprises a boost pump K pump, a return oil pump L pump, a return oil pump M pump, a return oil pump N pump, a return oil pump T pump and a return oil pump P pump;

[0006] The output end of the circulating oil tank is connected to the inlet end of the first oil pipe, the outlet end of the first oil pipe is connected to the input end of the boost pump K pump, the output end of the boost pump K pump is connected to the inlet end of the second oil pipe, the outlet end of the second oil pipe is connected to the input end of the second filter, the output end of the second filter is respectively connected to the inlet ends of the third oil pipe, the fourth oil pipe, the fifth oil pipe and the sixth oil pipe, the outlet end of the third oil pipe is connected to the input end of the first protective oil filter, the outlet end of the fourth oil pipe is connected to the input end of the second protective oil filter, the outlet end of the fifth oil pipe is connected to the input end of the third protective oil filter The outlet end of the sixth oil pipe is connected to the input end of the fourth protective oil filter, the output end of the first protective oil filter is connected to the lubricating oil input end of the gas turbine bearing component, the output end of the second protective oil filter is connected to the lubricating oil input end of the main transmission case, the output end of the third protective oil filter is connected to the lubricating oil input ends of the main transmission case, the high-pressure compressor rear casing, the low-pressure turbine support ring and the power turbine support ring, the output end of the fourth protective oil filter is connected to the lubricating oil input end of the low-pressure compressor front casing and the transition section, and the lubricating oil output end of the main transmission case is connected to the lubricating oil input end of the lower transmission case;

[0007] The lubricating oil output end of the front casing of the low-pressure compressor is connected to the inlet end of the seventh oil pipe, the outlet end of the seventh oil pipe is connected to the first lubricating oil input end of the oil-gas separation box, the lubricating oil output end of the transition section is connected to the inlet end of the sixteenth oil pipe, the outlet end of the sixteenth oil pipe is connected to the second lubricating oil input end of the oil-gas separation box, the lubricating oil output end of the oil-gas separation box is connected to the inlet end of the eighth oil pipe, and the outlet end of the eighth oil pipe is connected to the input end of the return oil pump N pump;

[0008] The lubricating oil output ends of the high-pressure compressor rear casing and the low-pressure turbine support ring are respectively connected to the lubricating oil input end of the lower transmission case, the lubricating oil output end of the lower transmission case is connected to the inlet end of the ninth oil pipe, and the outlet end of the ninth oil pipe is connected to the input end of the return oil pump P pump;

[0009] The lubricating oil output end of the power turbine support ring is connected to the inlet end of the tenth oil pipe, and the outlet end of the tenth oil pipe is connected to the input end of the return oil pump L pump;

[0010] The oil-gas mixture output ends of the low-pressure compressor front casing, the transition section, the high-pressure compressor rear casing, the low-pressure turbine support ring and the power turbine support ring are connected to the oil-gas mixture input end of the main transmission case, the oil-gas mixture output end of the main transmission case is connected to the oil-gas mixture input ends of the first centrifuge and the second centrifuge respectively, the lubricating oil output end of the first centrifuge is connected to the inlet end of the eleventh oil pipe, the outlet end of the eleventh oil pipe is connected to the input end of the return oil pump T pump, the lubricating oil output end of the second centrifuge is connected to the inlet end of the twelfth oil pipe, the outlet end of the twelfth oil pipe is connected to the input end of the return oil pump M pump, and the gas output ends of the first centrifuge and the second centrifuge are respectively connected to the gas discharge pipe;

[0011] The output ends of the return oil pump N pump, the return oil pump P pump, the return oil pump L pump, the return oil pump T pump and the return oil pump M pump are respectively connected to the input end of the air separator, the lubricating oil output end of the air separator is connected to the inlet end of the thirteenth oil pipe, the outlet end of the thirteenth oil pipe is connected to the input end of the first filter, the output end of the first filter is connected to the inlet end of the fourteenth oil pipe, the outlet end of the fourteenth oil pipe is connected to the input end of the lubricating oil cooler, the output end of the lubricating oil cooler is connected to the inlet end of the fifteenth oil pipe, and the outlet end of the fifteenth oil pipe is connected to the lubricating oil input end of the circulating oil tank.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention relates to a gas turbine lubrication system used in the shipbuilding industry, belonging to the energy and power industry, and specifically to a forced oil return circulation lubrication system, which ensures lubrication and cooling of bearing components and gear meshing parts of the gas turbine under all working conditions of the gas turbine, and is composed of an oil supply, oil return and ventilation system. The present invention provides a gas turbine lubrication system with stable performance, reliable operation, convenient maintenance, reasonable measurement point arrangement, low lubricating oil consumption and high safety. Lubricating oil is supplied to the gas turbine in the full range of working conditions, reducing friction and wear of the moving dual surfaces of the gas turbine, preventing them from corrosion and surface hardening, transferring heat generated by friction and heat transferred to the lubricating oil by high-temperature parts, and taking away hard inclusions formed between the dual surfaces, thereby ensuring reliable operation of the gas turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the present invention. DETAILED DESCRIPTION

[0015] Specific implementation method 1: Combination Figure 1 The present embodiment is described. A gas turbine lubrication system described in the present embodiment includes a first protective oil filter 1, a first centrifuge 2, a second centrifuge 3, a second protective oil filter 4, a main transmission case 5, a third protective oil filter 6, a front transmission case 7, a circulating oil tank 8, a lubricating oil cooler 10, a return oil filter 11, an oil supply filter 15, an air separator 16, a lower transmission case 17, a lubricating oil accessory 19, an oil-gas separation box 22 and a fourth protective oil filter 24. The lubricating oil accessory 19 includes a boost pump K pump, a return oil pump L pump, a return oil pump M pump, a return oil pump N pump, a return oil pump T pump and a return oil pump P pump.

[0016] The output end of the circulating oil tank 8 is connected to the inlet end of the first oil pipe 101, the outlet end of the first oil pipe 101 is connected to the input end of the boost pump K pump, the output end of the boost pump K pump is connected to the inlet end of the second oil pipe 102, the outlet end of the second oil pipe 102 is connected to the input end of the oil supply filter 15, the output end of the oil supply filter 15 is respectively connected to the inlet ends of the third oil pipe 103, the fourth oil pipe 104, the fifth oil pipe 105 and the sixth oil pipe 106, the outlet end of the third oil pipe 103 is connected to the input end of the first protective oil filter 1, the outlet end of the fourth oil pipe 104 is connected to the input end of the second protective oil filter 4, the outlet end of the fifth oil pipe 105 is connected to the input end of the The output end of the sixth oil pipe 106 is connected to the input end of the fourth protective oil filter 24, the output end of the first protective oil filter 1 is connected to the lubricating oil input end of the gas turbine bearing component, the output end of the second protective oil filter 4 is connected to the lubricating oil input end of the main transmission case 5, the output end of the third protective oil filter 6 is connected to the lubricating oil input ends of the main transmission case 5, the high-pressure compressor rear casing, the low-pressure turbine support ring and the power turbine support ring, the output end of the fourth protective oil filter 24 is connected to the lubricating oil input end of the low-pressure compressor front casing and the transition section, and the lubricating oil output end of the main transmission case 5 is connected to the lubricating oil input end of the lower transmission case 17;

[0017] The lubricating oil output end of the front casing of the low-pressure compressor is connected to the inlet end of the seventh oil pipe 107, the outlet end of the seventh oil pipe 107 is connected to the first lubricating oil input end of the oil-gas separation box 22, the lubricating oil output end of the transition section is connected to the inlet end of the sixteenth oil pipe 116, the outlet end of the sixteenth oil pipe 116 is connected to the second lubricating oil input end of the oil-gas separation box 22, the lubricating oil output end of the oil-gas separation box 22 is connected to the inlet end of the eighth oil pipe 108, and the outlet end of the eighth oil pipe 108 is connected to the input end of the return oil pump N pump;

[0018] The lubricating oil output ends of the high-pressure compressor rear casing and the low-pressure turbine support ring are respectively connected to the lubricating oil input ends of the lower transmission case 17, the lubricating oil output end of the lower transmission case 17 is connected to the inlet end of the ninth oil pipe 109, and the outlet end of the ninth oil pipe 109 is connected to the input end of the return oil pump P pump;

[0019] The lubricating oil output end of the power turbine support ring is connected to the inlet end of the tenth oil pipe 110, and the outlet end of the tenth oil pipe 110 is connected to the input end of the return oil pump L pump;

[0020] The oil-gas mixture output ends of the low-pressure compressor front casing, the transition section, the high-pressure compressor rear casing, the low-pressure turbine support ring and the power turbine support ring are connected to the oil-gas mixture input end of the main transmission case 5, the oil-gas mixture output end of the main transmission case 5 is connected to the oil-gas mixture input ends of the first centrifuge 2 and the second centrifuge 3 respectively, the lubricating oil output end of the first centrifuge 2 is connected to the inlet end of the eleventh oil pipe 111, the outlet end of the eleventh oil pipe 111 is connected to the input end of the return oil pump T pump, the lubricating oil output end of the second centrifuge 3 is connected to the inlet end of the twelfth oil pipe 112, the outlet end of the twelfth oil pipe 112 is connected to the input end of the return oil pump M pump, and the gas output ends of the first centrifuge 2 and the second centrifuge 3 are respectively connected to the gas exhaust pipe;

[0021] The output ends of the return oil pump N pump, the return oil pump P pump, the return oil pump L pump, the return oil pump T pump and the return oil pump M pump are respectively connected to the input end of the air separator 16, the lubricating oil output end of the air separator 16 is connected to the inlet end of the thirteenth oil pipe 113, the outlet end of the thirteenth oil pipe 113 is connected to the input end of the return oil filter 11, the output end of the return oil filter 11 is connected to the inlet end of the fourteenth oil pipe 114, the outlet end of the fourteenth oil pipe 114 is connected to the input end of the lubricating oil cooler 10, the output end of the lubricating oil cooler 10 is connected to the inlet end of the fifteenth oil pipe 115, and the outlet end of the fifteenth oil pipe 115 is connected to the lubricating oil input end of the circulating oil tank 8.

[0022] In this embodiment, when the gas turbine is working, the boost pump K pump in the lubricating oil accessory 19 draws lubricating oil from the circulating oil tank 8, filters it through the oil supply filter 15, and then passes through the first protective oil filter 1, the second protective oil filter 4, the third protective oil filter 6 and the fourth protective oil filter 24 to supply the lubricating oil to the gas turbine bearing components, the main transmission case 5, the high-pressure compressor rear casing, the low-pressure turbine support ring, the power turbine support ring, the low-pressure compressor front casing, the transition section and the lower transmission case 17, and then is drawn back through the return oil pump in the lubricating oil accessory 19 to lubricate and cool these components.

[0023] The worked lubricating oil coming out of the front casing and transition section of the low-pressure compressor is pumped back by the return oil pump N in the lubricating oil accessory 19 through the oil-gas separation box 22. The worked lubricating oil coming out of the rear casing of the high-pressure compressor and the low-pressure turbine support ring enters the lower transmission box 17 and is pumped back by the return oil pump P in the lubricating oil accessory 19. The worked lubricating oil coming out of the power turbine support ring is pumped back by the return oil pump L in the lubricating oil accessory 19.

[0024] The oil-gas mixture from the front casing of the low-pressure compressor, the transition section, the rear casing of the high-pressure compressor, the low-pressure turbine support ring and the power turbine support ring enters the main transmission case 5, and the first centrifuge 2 and the second centrifuge 3 finally separate the lubricating oil from the oil-gas mixture, and the separated air is discharged to the atmosphere. The lubricating oil separated by the first centrifuge 2 and the second centrifuge 3 is respectively pumped back by the return oil pump T pump and the return oil pump M pump in the lubricating oil accessory 19.

[0025] The lubricating oil drawn back by the lubricating oil accessory 19 is returned to the circulating oil tank 8 via the air separator 16 , the return oil filter 11 and the lubricating oil cooler 10 .

[0026] Specific implementation method 2: Combination Figure 1 To explain this embodiment, the oil supply filter 15 of this embodiment is provided with a pressure sensor 13. Other components and connection methods are the same as those of the first embodiment.

[0027] A pressure sensor 13 is used to detect the oil supply pressure of the lubrication system.

[0028] Specific implementation method three: Combination Figure 1 To explain this embodiment, the oil supply filter 15 of this embodiment is further provided with a pressure signal device 14. Other components and connection methods are the same as those of the second embodiment.

[0029] The pressure signal device 14 is used to provide protection against a drop in the inlet oil pressure of the gas turbine.

[0030] Specific implementation method four: Combination Figure 1 To explain this embodiment, in this embodiment, the first oil pipe 101 is provided with a first thermal resistor converter 9, the thirteenth oil pipe 113 is provided with a second thermal resistor converter 12, and the eighth oil pipe 108 is provided with a third thermal resistor converter 21. Other components and connection methods are the same as those of the first, second or third embodiments.

[0031] A thermal resistor converter is used to detect the lubricating oil temperature at the gas turbine inlet, the lubricating oil temperature at the outlet of the gas turbine oil-gas separation box, and the lubricating oil temperature of the return oil pipeline before the lubricating oil cooler.

[0032] Specific implementation method five: Combination Figure 1 To explain this embodiment, the input end of the air separator 16 of this embodiment is provided with a first magnetic metal chip signal 18, the seventh oil pipe 107 is provided with a second magnetic metal chip signal 23, and the sixteenth oil pipe 116 is provided with a third magnetic metal chip signal 20. Other components and connection methods are the same as those of the fourth embodiment.

[0033] A magnetic metal chip signaler is used to diagnose the wear status of gas turbine bearing components and gears.

[0034] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A gas turbine lubrication system, characterized in that: The gas turbine lubrication system comprises a first protective oil filter (1), a first centrifuge (2), a second centrifuge (3), a second protective oil filter (4), a main transmission case (5), a third protective oil filter (6), a front transmission case (7), a circulating oil tank (8), a lubricating oil cooler (10), a return oil filter (11), an oil supply filter (15), an air separator (16), a lower transmission case (17), a lubricating oil accessory (19), an oil-gas separation box (22) and a fourth protective oil filter (24), wherein the lubricating oil accessory (19) comprises a boost pump K pump, a return oil pump L pump, a return oil pump M pump, a return oil pump N pump, a return oil pump T pump and a return oil pump P pump; The output end of the circulating oil tank (8) is connected to the inlet end of the first oil pipe (101), the outlet end of the first oil pipe (101) is connected to the input end of the boost pump K pump, the output end of the boost pump K pump is connected to the inlet end of the second oil pipe (102), the outlet end of the second oil pipe (102) is connected to the input end of the oil supply filter (15), the output end of the oil supply filter (15) is respectively connected to the inlet ends of the third oil pipe (103), the fourth oil pipe (104), the fifth oil pipe (105) and the sixth oil pipe (106), the outlet end of the third oil pipe (103) is connected to the input end of the first protective oil filter (1), the outlet end of the fourth oil pipe (104) is connected to the input end of the second protective oil filter (4), the outlet end of the fifth oil pipe (105) is connected to the input end of the fifth oil pipe (106) and the outlet end of the sixth oil pipe (107). The outlet end of the oil filter (5) is connected to the input end of the third protective oil filter (6), the outlet end of the sixth oil pipe (106) is connected to the input end of the fourth protective oil filter (24), the output end of the first protective oil filter (1) is connected to the lubricating oil input end of the gas turbine bearing component, the output end of the second protective oil filter (4) is connected to the lubricating oil input end of the main transmission case (5), the output end of the third protective oil filter (6) is connected to the lubricating oil input ends of the main transmission case (5), the high-pressure compressor rear casing, the low-pressure turbine support ring and the power turbine support ring, the output end of the fourth protective oil filter (24) is connected to the lubricating oil input end of the low-pressure compressor front casing and the transition section, and the lubricating oil output end of the main transmission case (5) is connected to the lubricating oil input end of the lower transmission case (17); The lubricating oil output end of the front casing of the low-pressure compressor is connected to the inlet end of the seventh oil pipe (107), the outlet end of the seventh oil pipe (107) is connected to the first lubricating oil input end of the oil-gas separation box (22), the lubricating oil output end of the transition section is connected to the inlet end of the sixteenth oil pipe (116), the outlet end of the sixteenth oil pipe (116) is connected to the second lubricating oil input end of the oil-gas separation box (22), the lubricating oil output end of the oil-gas separation box (22) is connected to the inlet end of the eighth oil pipe (108), and the outlet end of the eighth oil pipe (108) is connected to the input end of the return oil pump N pump; The lubricating oil output ends of the high-pressure compressor rear casing and the low-pressure turbine support ring are respectively connected to the lubricating oil input ends of the lower transmission box (17), the lubricating oil output end of the lower transmission box (17) is connected to the inlet end of the ninth oil pipe (109), and the outlet end of the ninth oil pipe (109) is connected to the input end of the return oil pump P pump; The lubricating oil output end of the power turbine support ring is connected to the inlet end of the tenth oil pipe (110), and the outlet end of the tenth oil pipe (110) is connected to the input end of the return oil pump L pump; The oil-gas mixture output ends of the low-pressure compressor front casing, the transition section, the high-pressure compressor rear casing, the low-pressure turbine support ring and the power turbine support ring are connected to the oil-gas mixture input end of the main transmission case (5), the oil-gas mixture output end of the main transmission case (5) is connected to the oil-gas mixture input ends of the first centrifuge (2) and the second centrifuge (3), respectively, the lubricating oil output end of the first centrifuge (2) is connected to the inlet end of the eleventh oil pipe (111), the outlet end of the eleventh oil pipe (111) is connected to the input end of the return oil pump T pump, the lubricating oil output end of the second centrifuge (3) is connected to the inlet end of the twelfth oil pipe (112), the outlet end of the twelfth oil pipe (112) is connected to the input end of the return oil pump M pump, and the gas output ends of the first centrifuge (2) and the second centrifuge (3) are respectively connected to the gas discharge pipe; The output ends of the oil return pump N pump, the oil return pump P pump, the oil return pump L pump, the oil return pump T pump and the oil return pump M pump are respectively connected to the input end of the air separator (16), the lubricating oil output end of the air separator (16) is connected to the inlet end of the thirteenth oil pipe (113), the outlet end of the thirteenth oil pipe (113) is connected to the input end of the oil return filter (11), the output end of the oil return filter (11) is connected to the inlet end of the fourteenth oil pipe (114), the outlet end of the fourteenth oil pipe (114) is connected to the input end of the lubricating oil cooler (10), the output end of the lubricating oil cooler (10) is connected to the inlet end of the fifteenth oil pipe (115), and the outlet end of the fifteenth oil pipe (115) is connected to the lubricating oil input end of the circulating oil tank (8).

2. A gas turbine lubrication system according to claim 1, characterized in that: The oil supply filter (15) is provided with a pressure sensor (13).

3. A gas turbine lubrication system according to claim 2, characterized in that: The oil supply filter (15) is also provided with a pressure signal device (14).

4. A gas turbine lubrication system according to claim 1, 2 or 3, characterized in that: The first oil pipe (101) is provided with a first thermal resistor converter (9), the thirteenth oil pipe (113) is provided with a second thermal resistor converter (12), and the eighth oil pipe (108) is provided with a third thermal resistor converter (21).

5. A gas turbine lubrication system according to claim 4, characterized in that: The input end of the air separator (16) is provided with a first magnetic metal chip signal device (18), the seventh oil pipe (107) is provided with a second magnetic metal chip signal device (23), and the sixteenth oil pipe (116) is provided with a third magnetic metal chip signal device (20).

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