CN110617148B - Reversing power turbine rotating mechanism system - Google Patents
Reversing power turbine rotating mechanism system Download PDFInfo
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- CN110617148B CN110617148B CN201911047379.0A CN201911047379A CN110617148B CN 110617148 B CN110617148 B CN 110617148B CN 201911047379 A CN201911047379 A CN 201911047379A CN 110617148 B CN110617148 B CN 110617148B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 50
- 230000002441 reversible effect Effects 0.000 claims description 33
- 238000007789 sealing Methods 0.000 claims description 16
- 239000007789 gas Substances 0.000 description 26
- 239000000203 mixture Substances 0.000 description 9
- 230000003068 static effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
- F01D1/24—Non-positive-displacement machines or engines, e.g. steam turbines characterised by counter-rotating rotors subjected to same working fluid stream without intermediate stator blades or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
- F01D25/26—Double casings; Measures against temperature strain in casings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Turbines (AREA)
Abstract
A reversing power turbine rotating mechanism system relates to the field of energy power equipment. The invention solves the problems that the current switching of the power turbine duct cannot be carried out and the direct reversing function cannot be realized in the existing gas turbine. According to the invention, the outer casing, the middle casing and the front casing are sequentially and hermetically connected from left to right, the nozzle ring is connected with the left end face of the outer casing through the connecting ring, the inner casing is inserted into the outer casing, the left end of the inner casing is connected with the nozzle ring, the movable vane disk is matched with the nozzle ring, the left end of the movable vane disk is fixedly connected with an external power turbine rotor, a switching valve is rotatably connected to each first boss at the right end of the inner sleeve of the outer casing, the input end of the connecting rod mechanism penetrates through the middle casing and is fixedly connected with a corresponding electric cylinder, and the output end of the connecting rod mechanism is rotatably connected with the upper part of the switching valve. The invention is used for switching the bypass flow of the power turbine of the gas turbine and realizing the reversing function of the gas turbine.
Description
Technical Field
The invention relates to the field of energy power equipment, in particular to a reversing power turbine rotating mechanism system.
Background
Gas turbines are favored by naval force of various countries because of the characteristics of high power density, rapid response and the like from the birth date, and become main power equipment of large-sized ships on the water surface. The united states, united kingdom and russia have developed a number of surface vessels equipped with gas turbines, the gas turbine design techniques being increasingly sophisticated. The technical level of the ship gas turbine in China is greatly improved by introducing advanced ship gas turbine technology and carrying out domestic development work, but the front scientific technology of the gas turbine is lagged behind the developed country. The western countries began to study the gas turbine direct reverse turbine technology from 70 s and russia has been currently in actual use. The research work of the direct reverse turbine technology of the gas turbine is not developed in China.
The gas turbine, which is one of the main power units of navy, has a number of important advantages, but it is still a major drawback in that it cannot be directly backed up. For many years, much effort has been spent on solving the reverse problem of gas turbines, but none have achieved a desirable result. At present, the reversing problem of the ship gas turbine in China is realized through an adjustable screw propeller. While the adjustable propeller uses a conventional gearbox and provides balanced thrust control, it has certain limitations and serious drawbacks. First, it delivers a power up to 33MW, which is a significant cost beyond this power. Second, the size and weight of the components, such as the adjustable propeller, shafting and bearings, that are compatible with high power gas turbines are much larger and more expensive than conventional fixed-pitch propellers. The greater size of the underwater components compared to a fixed pitch propeller results in a 10% increase in hull resistance at full power and a 6% increase in resistance at cruise operation, and the adjustable pitch propeller is complex in construction, difficult to maintain, and more complex in design and system, especially for use on high power gas turbines.
In summary, the existing gas turbine has the problems that the power turbine duct cannot be subjected to through-flow switching, and then the direct reversing function cannot be realized.
Disclosure of Invention
The invention aims to solve the problem that the current of the existing gas turbine cannot be switched by the power turbine duct, and further the direct reversing function cannot be realized, and further provides a reversing power turbine rotating mechanism system.
The technical scheme of the invention is as follows:
the reversing power turbine rotating mechanism system comprises a movable blade disc 1, a nozzle ring 2, an outer casing 3, an inner casing 4, a middle casing 6, a front casing 9, a connecting ring 10, a plurality of switching valves 5, a plurality of electric cylinders and a plurality of connecting rod mechanisms, wherein the outer casing 3, the middle casing 6 and the front casing 9 are sequentially and hermetically connected from left to right, the nozzle ring 2 is positioned at the left side of the outer casing 3, the nozzle ring 2 is connected with the left end surface of the outer casing 3 through the connecting ring 10, the inner casing 4 is inserted in the outer casing 3, the left end of the inner casing 4 is connected with the nozzle ring 2, the movable blade disc 1 is coaxially arranged in the nozzle ring 2, the movable blade disc 1 is matched with the nozzle ring 2, the left end of the movable blade disc 1 is fixedly connected with an external power turbine rotor, the outer casing 3 comprises a casing outer sleeve 3-1, a casing inner sleeve 3-2, a plurality of struts 3-3 and a plurality of first bosses 3-4, the casing outer sleeve 3-1 is sleeved outside the casing inner sleeve 3-2, a plurality of struts 3-3 are uniformly distributed between the casing outer sleeve 3-1 and the casing inner sleeve 3-2, gaps exist between the adjacent struts 3-3, the casing outer sleeve 3-1 is connected with the casing inner sleeve 3-2 through the plurality of struts 3-3, a plurality of first bosses 3-4 are uniformly distributed on the outer circumference of the right end of the casing inner sleeve 3-2, each first boss 3-4 is rotatably connected with a switching valve 5, a plurality of connecting rod mechanisms are uniformly distributed between the switching valve 5 and the middle casing 6, a plurality of electric cylinders are uniformly distributed on the outer wall of the middle casing 6, the input end of each connecting rod mechanism penetrates through the middle casing 6 and is fixedly connected with the corresponding electric cylinder, the output end of the connecting rod mechanism is rotatably connected with the upper part of the switching valve 5, when all the switching valves 5 are overlapped with the outer wall of the inner casing 4, a sealed outer duct Q is formed among the nozzle ring 2, the casing outer sleeve 3-1, the middle casing 6, the front casing 9, the inner casing 4, the switching valves 5 and the casing inner sleeve 3-2; when all the switching valves 5 overlap with the inner wall of the front casing 9, a sealed inner duct P is formed between the nozzle ring 2, the casing inner sleeve 3-2, the switching valves 5, the front casing 9 and the inner casing 4.
Further, the intermediate casing 6 comprises a front flange 6-1, a rear flange 6-2, a wall plate 6-3 and a plurality of protruding covers 6-4, the wall plate 6-3 is of an annular sleeving structure, the front flange 6-1 and the rear flange 6-2 are coaxially arranged at two ends of the wall plate 6-3 respectively, the inner wall of the wall plate 6-3 is outwards extended to form a plurality of protruding covers 6-4 in an annular array mode, the inner surface of the protruding covers 6-4 and the inner wall of the wall plate 6-3 form pits, the number of the pits is consistent with that of the switching valves 5, the pits are matched with the switching valves 5, and pit shaft holes 6-5 are formed in two sides of each pit.
Further, the switching valve 5 comprises a baffle 5-1, a connecting lug 5-2, a connecting arm 5-3 and a first pin shaft 5-4, wherein the connecting arm 5-3 is of an arc rod-shaped structure, one end of the connecting arm 5-3 is connected with the upper end face of the baffle 5-1, the other end of the connecting arm 5-3 is rotatably connected with a first boss 3-4 on the outer circumference of the right end of the inner sleeve 3-2 of the casing through the first pin shaft 5-4, the middle part of the upper end face of the baffle 5-1 is provided with the connecting lug 5-2, and the connecting lug 5-2 is connected with the connecting rod mechanism through the first pin shaft 5-4.
Further, the upper end face of one side of the baffle plate 5-1 extends outwards to form a second boss 5-5, the right end face of the inner sleeve 3-2 of the casing is provided with a first step, the lower end face of the other side of the baffle plate 5-1 extends outwards to form a third boss 5-7, the left end face of the front casing 9 is provided with a second step, when the switching valve 5 is overlapped with the inner wall of the front casing 9, the second boss 5-5 of the baffle plate 5-1 is in sealing fit with the first step side face 3-5 of the inner sleeve 3-2 of the casing, the upper end face of the other side of the baffle plate 5-1 is in sealing fit with the second step side face 9-1 of the front casing 9, and the third boss 5-7 of the baffle plate 5-1 is in sealing fit with the second step bottom face 9-2 of the front casing 9.
Further, a fourth boss 5-6 extends outwards from the lower end face of one side of the baffle plate 5-1, the right side of the inner casing 4 is of a conical closed structure, and when the switching valve 5 is overlapped with the outer wall of the inner casing 4, the fourth boss 5-6 of the baffle plate 5-1 is in sealing fit with the inner wall of the right side of the inner casing sleeve 3-2, and the lower end face of the right side of the baffle plate 5-1 is in sealing fit with the conical surface of the right side of the inner casing 4.
Further, when all the switching valves 5 overlap with the outer wall of the inner casing 4, a closed conical surface structure is formed between the switching valves 5, and at this time, the outer duct Q is opened, and the inner duct P is closed.
Further, when all the switching valves 5 overlap with the inner wall of the front casing 9, the plurality of switching valves 5 are sequentially disposed at the plurality of recesses of the middle casing 6 to form a closed cylindrical surface structure, at this time, the inner duct P is opened, and the outer duct Q is closed.
Further, the link mechanism comprises a first link 7, a second link 8 and a second pin 11, one end of the first link 7 is installed on the concave shaft hole 6-5 of the convex cover 6-4 through the second pin 11, the first link 7 is fixedly connected with a corresponding electric cylinder output shaft through the second pin 11, the other end of the first link 7 is rotationally connected with one end of the second link 8 through the second pin 11, and the other end of the second link 8 is rotationally connected with the connecting lug 5-2 of the switching valve 5 through the second pin 11.
Further, the blades in the movable blade disc 1 are of a double-layer structure, the movable blade disc 1 comprises a forward moving blade 1-1 and a backward moving blade 1-2, the forward moving blade 1-1 is arranged on the inner ring of the lower portion of the movable blade disc 1, the backward moving blade 1-2 is arranged on the outer ring of the upper portion of the movable blade disc 1, and the backward moving blade 1-2 is in blade shape opposite to the forward moving blade 1-1.
Further, the blades of the nozzle ring 2 are of a double-layer structure, the nozzle ring 2 comprises front-running static blades 2-1 and reversing static blades 2-2, the front-running static blades 2-1 are arranged on the inner ring of the lower portion of the nozzle ring 2, the front-running static blades 2-1 are matched with the front-running moving blades 1-1, reversing static blades 2-2 are arranged on the outer ring of the upper portion of the nozzle ring 2, the reversing static blades 2-2 are in reverse blade shapes with the front-running static blades 2-1, and the reversing static blades 2-2 are matched with the reversing moving blades 1-2.
Compared with the prior art, the invention has the following effects:
1. the reversing power turbine rotating mechanism system can switch the through flow of the power turbine culvert of the gas turbine, can realize independent control of reversing valves, realizes smooth conversion of air flow and realizes reversing function of the gas turbine. The structure is safe and reliable, the control is flexible, and the stable work under severe working conditions is ensured. The sealing performance is good, and the power loss relative to a prototype is ensured to be within 5% when the reversing power turbine rotating mechanism system is added.
2. The working temperature range of the reversing power turbine rotating mechanism system is wide from 0 ℃ to 900 ℃, and the high-temperature resistant material can be selected to replace the original material according to the temperature of practical application. The bypass flow switching device is used for switching the bypass flow of the power turbine of the gas turbine, and achieves the reversing function of the gas turbine. The structural strength of the driving mechanism can be adjusted according to the pressure difference between the inner duct and the outer duct of the gas turbine in practical application. The reversing power turbine rotating mechanism system can be adjusted according to the size of the gas turbine in practical application.
Drawings
FIG. 1 is a schematic diagram of a reversing power turbine rotating mechanism system (outer duct closed, inner duct open) of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic diagram of a reversing power turbine rotating mechanism system (with closed internal ducts and open external ducts) according to the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at B;
FIG. 5 is a schematic view of the outer casing structure of the present invention;
FIG. 6 is a schematic view of an intermediate casing structure of the present invention;
FIG. 7 is a schematic view of a rotor disk structure of the present invention;
FIG. 8 is a schematic view of a nozzle ring structure of the present invention;
FIG. 9 is a schematic diagram of a switching valve according to the present invention (outer channel is closed and inner channel is open);
FIG. 10 is a schematic diagram of a switching valve according to the present invention (with the inner bypass closed and the outer bypass open);
fig. 11 is an isometric view of an intermediate receiver of the present invention.
Detailed Description
The first embodiment is as follows: describing the present embodiment with reference to fig. 1, 3 and 5, a reversing power turbine rotary mechanism system of the present embodiment includes a moving blade disc 1, a nozzle ring 2, an outer casing 3, an inner casing 4, an intermediate casing 6, a front casing 9, a connecting ring 10, a plurality of switching valves 5, a plurality of electric cylinders and a plurality of link mechanisms, the outer casing 3, the intermediate casing 6 and the front casing 9 are sequentially and hermetically connected from left to right, the nozzle ring 2 is located at the left side of the outer casing 3, the nozzle ring 2 is connected with the left end face of the outer casing 3 through the connecting ring 10, the inner casing 4 is inserted inside the outer casing 3, the left end of the inner casing 4 is connected with the nozzle ring 2, the moving blade disc 1 is coaxially disposed inside the nozzle ring 2, the moving blade disc 1 is matched with the nozzle ring 2, the left end of the moving blade disc 1 is fixedly connected with an external power turbine rotor, the outer casing 3 comprises a casing outer sleeve 3-1, a casing inner sleeve 3-2, a plurality of struts 3-3 and a plurality of first bosses 3-4, the casing outer sleeve 3-1 is sleeved outside the casing inner sleeve 3-2, a plurality of struts 3-3 are uniformly distributed between the casing outer sleeve 3-1 and the casing inner sleeve 3-2, gaps exist between the adjacent struts 3-3, the casing outer sleeve 3-1 is connected with the casing inner sleeve 3-2 through the plurality of struts 3-3, a plurality of first bosses 3-4 are uniformly distributed on the outer circumference of the right end of the casing inner sleeve 3-2, a switching valve 5 is rotatably connected on each first boss 3-4, a plurality of connecting rod mechanisms are uniformly distributed between the switching valve 5 and the middle casing 6, a plurality of electric cylinders are uniformly distributed on the outer wall of the middle casing 6, the input ends of the connecting rod mechanisms penetrate the middle casing 6 and are fixedly connected with the corresponding electric cylinders, the output end of the connecting rod mechanism is rotatably connected with the upper part of the switching valve 5, and when all the switching valves 5 are overlapped with the outer wall of the inner casing 4, a sealed outer duct Q is formed among the nozzle ring 2, the casing outer sleeve 3-1, the middle casing 6, the front casing 9, the inner casing 4, the switching valve 5 and the casing inner sleeve 3-2; when all the switching valves 5 overlap with the inner wall of the front casing 9, a sealed inner duct P is formed between the nozzle ring 2, the casing inner sleeve 3-2, the switching valves 5, the front casing 9 and the inner casing 4.
The rotor blade disk 1 of the present embodiment is fixedly connected to an external power turbine rotor, and is configured to transmit torque and apply work to a load. The nozzle ring 2 of the present embodiment is fixed to the outer casing 3 by the connecting ring 10, and the stationary blades of the nozzle ring 2 are used in cooperation with the moving blades of the moving blade disk 1, thereby functioning as a guide flow. The outer casing 3, the intermediate casing 6 and the front casing 9 are fixedly connected by bolts in sequence to form an outer duct Q and form a front section of an inner duct P. The inner casing 4 is fixedly connected with the nozzle ring 2 by bolts, and forms a rear section of the inner duct P with the inner wall of the outer casing 3.
The electric cylinder manufacturer of the present embodiment is an SLA20 electric cylinder of the tin-free eirt linear motion machinery company.
The second embodiment is as follows: referring to fig. 6 and 11, the middle casing 6 of this embodiment includes a front flange 6-1, a rear flange 6-2, a wall plate 6-3 and a plurality of protruding covers 6-4, the wall plate 6-3 is of an annular sleeving structure, the front flange 6-1 and the rear flange 6-2 are coaxially disposed at two ends of the wall plate 6-3, the inner wall of the wall plate 6-3 extends outwards in an annular array manner to form a plurality of protruding covers 6-4, the inner surface of the protruding covers 6-4 and the inner wall of the wall plate 6-3 form recesses, the number of the recesses is consistent with that of the switching valve 5, the shape of the recesses is matched with that of the switching valve 5, and recess shaft holes 6-5 are formed in two sides of each recess. Other compositions and connection relationships are the same as those of the first embodiment.
And a third specific embodiment: referring to fig. 1, the switching valve 5 of the present embodiment includes a baffle 5-1, a connecting lug 5-2, a connecting arm 5-3 and a first pin 5-4, wherein the connecting arm 5-3 is in an arc rod structure, one end of the connecting arm 5-3 is connected with the upper end face of the baffle 5-1, the other end of the connecting arm 5-3 is rotatably connected with a first boss 3-4 on the outer circumference of the right end of the inner sleeve 3-2 of the casing through the first pin 5-4, the middle part of the upper end face of the baffle 5-1 is provided with the connecting lug 5-2, and the connecting lug 5-2 is connected with the link mechanism through the first pin 5-4. Other compositions and connection relationships are the same as those of the first or second embodiment.
The specific embodiment IV is as follows: referring to fig. 1 to 4, in the present embodiment, the second boss 5-5 is extended outward from the upper end surface of one side of the baffle 5-1, the first step is provided on the right end surface of the inner sleeve 3-2 of the casing, the third boss 5-7 is extended outward from the lower end surface of the other side of the baffle 5-1, the second step is provided on the left end surface of the front casing 9, and when the switching valve 5 is overlapped with the inner wall of the front casing 9, the second boss 5-5 of the baffle 5-1 is in sealing engagement with the first step side surface 3-5 of the inner sleeve 3-2 of the casing, the upper end surface of the other side of the baffle 5-1 is in sealing engagement with the second step side surface 9-1 of the front casing 9, and the third boss 5-7 of the baffle 5-1 is in sealing engagement with the second step bottom surface 9-2 of the front casing 9. Other compositions and connection relationships are the same as those of the first, second or third embodiments.
Fifth embodiment: referring to fig. 1 to 4, in the present embodiment, a fourth boss 5-6 extends outwardly from a lower end surface of one side of a baffle plate 5-1, and the right side of an inner casing 4 is a conical closed structure, and when a switching valve 5 is overlapped with an outer wall of the inner casing 4, the fourth boss 5-6 of the baffle plate 5-1 is in sealing fit with an inner wall of the right side of an inner casing sleeve 3-2, and the lower end surface of the right side of the baffle plate 5-1 is in sealing fit with a conical surface of the right side of the inner casing 4. Other compositions and connection relationships are the same as those of the first, second, third, fourth or fifth embodiments.
Specific embodiment six: in the present embodiment, when all the switching valves 5 overlap the outer wall of the inner casing 4, a closed conical surface structure is formed between the switching valves 5, and at this time, the outer duct Q is opened and the inner duct P is closed, as described with reference to fig. 3, 4 and 10. In this way, the switching valve 5 and the link mechanism of the present embodiment are connected to each other, the switching control of the switching valve 5 is performed, and the switching valve 5 is designed in a sealed structure. When all the switching valves 5 overlap with the outer wall of the inner casing 4, the inner channel P is closed and the outer channel Q is opened, and the switching valves 5 are shown in fig. 3 and 4, and each switching valve 5 forms a closed area together, and the area is a conical surface. The arrangement can realize the switching of the air flow between the inner duct and the outer duct, and further realize the forward rotation or the reverse rotation of the turbine driven by the air of different ducts, thereby realizing the direct reversing. Other compositions and connection relationships are the same as those of the first, second, third or fourth embodiments.
Seventh embodiment: in the present embodiment, when all the switching valves 5 overlap the inner wall of the front casing 9, the plurality of switching valves 5 are sequentially disposed at the plurality of recesses of the intermediate casing 6 to form a closed cylindrical surface structure, and at this time, the inner duct P is opened and the outer duct Q is closed, as described with reference to fig. 1, 2 and 9. In this way, the switching valve 5 and the link mechanism of the present embodiment are connected to each other, the switching control of the switching valve 5 is performed, and the switching valve 5 is designed in a sealed structure. When all the switching valves 5 are lapped with the inner wall of the front casing 9, the outer duct Q is closed, the inner duct P is opened, and at this time, as shown in fig. 1 and 2, the triangular area between the switching valves 5 can be sealed by the extending part between two adjacent recesses on the inner wall of the middle casing 6, so that when all the switching valves 5 are lapped with the inner wall of the front casing 9, a closed space can be formed between each switching valve 5 and the middle casing 6. Other compositions and connection relationships are the same as those of the first, second, third, fourth, fifth or sixth embodiments.
Eighth embodiment: referring to fig. 3, the link mechanism of the present embodiment includes a first link 7, a second link 8, and a second pin 11, one end of the first link 7 is mounted on the concave shaft hole 6-5 of the protruding cover 6-4 through the second pin 11, the first link 7 is fixedly connected with the corresponding electric cylinder output shaft through the second pin 11, the other end of the first link 7 is rotatably connected with one end of the second link 8 through the second pin 11, and the other end of the second link 8 is rotatably connected with the connecting lug 5-2 of the switching valve 5 through the second pin 11. In this way, the switching valve 5 of the present embodiment is connected to each other via the second link 8 and the first link 7, and the switching control of the switching valve 5 is performed. The connecting rod mechanism pushes the switching valve 5 to rotate around the fixed pivot rotating shaft on the first boss 3-4, so that the airflow switching function of the reversing power turbine rotating mechanism system is realized. Other compositions and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth or seventh embodiments.
Detailed description nine: in the present embodiment, referring to fig. 7, the blade in the rotor disk 1 of the present embodiment has a double-layer structure, the rotor disk 1 includes the forward rotor blade 1-1 and the reverse rotor blade 1-2, the forward rotor blade 1-1 is provided in the lower inner ring of the rotor disk 1, the reverse rotor blade 1-2 is provided in the upper outer ring of the rotor disk 1, and the reverse rotor blade 1-2 is in the reverse blade profile with the forward rotor blade 1-1. In this way, the forward moving blade 1-1 and the forward stationary blade 2-1 of the present embodiment are used in combination, thereby realizing the function of pushing the turbine to rotate forward. The outer ring at the upper part of the forward moving blade 1-1 is provided with a reverse moving blade 1-2 with a reverse blade shape, and the reverse moving blade is matched with the reverse stationary blade 2-2 for use, so that the function of pushing the turbine to rotate reversely is realized. When the gas turbine is running, the reversing channel is closed, and the reversing moving blades 1-2 also rotate together. When the gas turbine runs backwards, the reversing through-flow channel is opened, air flow is led in, and the turbine is pushed to reverse, so that the direct reversing of the gas turbine in running is realized. Through the optimization of the blade profile of the forward and reverse moving blades, the smaller blade profile loss of the forward and reverse moving blades is realized. Other compositions and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth, seventh or eighth embodiments.
Detailed description ten: in the description of the present embodiment with reference to fig. 7 and 8, the vanes of the nozzle ring 2 of the present embodiment are of a double-layer structure, the nozzle ring 2 includes the stationary vanes 2-1 and the reversing vanes 2-2, the lower inner ring of the nozzle ring 2 is provided with the stationary vanes 2-1, the stationary vanes 2-1 are engaged with the stationary vanes 1-1, the upper outer ring of the nozzle ring 2 is provided with the reversing vanes 2-2, the reversing vanes 2-2 are in reverse vane type with the stationary vanes 2-1, and the reversing vanes 2-2 are engaged with the reversing vanes 1-2. In this way, the stationary blades 2-1 and the stationary blades 1-1 of the present embodiment are used in combination, thereby realizing the function of pushing the turbine to rotate forward. A layer of reversing stator blades 2-2 are added to the outer ring of the forward stator blade 2-1, the added reversing stator blades 2-2 are in reversing with the forward stator blade 2-1 blade profile of the inner ring, and the reversing stator blades 2-2 and the reversing rotor blades 1-2 are matched for use, so that the function of pushing the turbine to reverse is realized. Through the optimization of the vane profiles of the front and back-up stator vanes, the smaller vane profile loss of the front and back-up stator vanes is realized. Other compositions and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth, seventh, eighth or ninth embodiments.
Principle of operation
When the electric cylinders drive all the switching valves 5 to be overlapped with the inner wall of the front casing 9 through the connecting rod mechanism (namely the second pin shaft 11, the first connecting rod 7 and the second connecting rod 8) (as shown in fig. 1 and 2), the outer culvert Q is closed (the reversing channel is closed), the inner culvert P is opened (the forward channel is opened), and the fuel gas flows through the inner culvert P and the forward stationary blades 2-1 of the nozzle ring 2 and acts on the forward moving blades 1-1 of the movable blade disc 1 to push the turbine to rotate forward, so that the forward running of the gas turbine is realized;
when the electric cylinders drive all the switching valves 5 to overlap with the outer wall of the inner casing 4 through the connecting rod mechanism (namely the second pin shaft 11, the first connecting rod 7 and the second connecting rod 8) (as shown in fig. 3 and 4), the inner culvert P is closed (the forward passage is closed), the outer culvert Q is opened (the reverse passage is opened), the fuel gas flows through the outer culvert Q and the reversing stator blades 2-2 of the nozzle ring 2, acts on the reversing rotor blades 1-2 of the rotor disc 1, and pushes the turbine to reverse, so that the direct reversing of the gas turbine in operation is realized.
Claims (10)
1. A reversing power turbine rotary mechanism system, characterized by: the device comprises a movable blade disc (1), a nozzle ring (2), an outer casing (3), an inner casing (4), a middle casing (6), a front casing (9), a connecting ring (10), a plurality of switching valves (5), a plurality of electric cylinders and a plurality of connecting rod mechanisms, wherein the outer casing (3), the middle casing (6) and the front casing (9) are sequentially and hermetically connected from left to right, the nozzle ring (2) is positioned at the left side of the outer casing (3), the nozzle ring (2) is connected with the left end face of the outer casing (3) through the connecting ring (10), the inner casing (4) is inserted into the outer casing (3), the left end of the inner casing (4) is connected with the nozzle ring (2), the movable vane disk (1) is coaxially arranged inside the nozzle ring (2), the movable vane disk (1) is matched with the nozzle ring (2), the left end of the movable vane disk (1) is fixedly connected with an external power turbine rotor, the outer casing (3) comprises a casing outer sleeve (3-1), a casing inner sleeve (3-2), a plurality of support posts (3-3) and a plurality of first bosses (3-4), the casing outer sleeve (3-1) is sleeved outside the casing inner sleeve (3-2), a plurality of support posts (3-3) are uniformly distributed between the casing outer sleeve (3-1) and the casing inner sleeve (3-2), a gap exists between every two adjacent struts (3-3), a casing outer sleeve (3-1) is connected with a casing inner sleeve (3-2) through a plurality of struts (3-3), a plurality of first bosses (3-4) are uniformly distributed on the outer circumference of the right end of the casing inner sleeve (3-2), a switching valve (5) is rotatably connected to each first boss (3-4), a plurality of connecting rod mechanisms are uniformly distributed between each switching valve (5) and an intermediate casing (6), a plurality of electric cylinders are uniformly distributed on the outer wall of the intermediate casing (6), the input end of each connecting rod mechanism passes through the intermediate casing (6) and is fixedly connected with the corresponding electric cylinder, the output end of each connecting rod mechanism is rotatably connected with the upper part of each switching valve (5), and when all the switching valves (5) are in lap joint with the outer wall of the inner casing (4), a sealed outer channel (Q) is formed among the nozzle ring (2), the casing outer sleeve (3-1), the intermediate casing (6), the front casing (9), the inner casing (4), the switching valve (5) and the casing inner casing (3-2); when all the switching valves (5) are overlapped with the inner wall of the front casing (9), a sealed inner duct (P) is formed among the nozzle ring (2), the casing inner sleeve (3-2), the switching valves (5), the front casing (9) and the inner casing (4).
2. A reversible power turbine rotary mechanism system as claimed in claim 1, wherein: the middle casing (6) comprises a front flange (6-1), a rear flange (6-2), a wall plate (6-3) and a plurality of convex covers (6-4), wherein the wall plate (6-3) is of an annular sleeving structure, the front flange (6-1) and the rear flange (6-2) are respectively coaxially arranged at two ends of the wall plate (6-3), the inner wall of the wall plate (6-3) is outwards extended to form a plurality of convex covers (6-4) in an annular array mode, the inner surfaces of the convex covers (6-4) are concave with the inner wall of the wall plate (6-3), the quantity of the concave is consistent with that of the switching valve (5), the shape of the concave is matched with that of the switching valve (5), and concave shaft holes (6-5) are formed in two sides of each concave.
3. A reversible power turbine rotary mechanism system as claimed in claim 1, wherein: the switching valve (5) comprises a baffle plate (5-1), a connecting lug (5-2), a connecting arm (5-3) and a first pin shaft (5-4), wherein the connecting arm (5-3) is of an arc-shaped rod structure, one end of the connecting arm (5-3) is connected with the upper end face of the baffle plate (5-1), the other end of the connecting arm (5-3) is rotatably connected with a first boss (3-4) on the outer circumference of the right end of the inner sleeve (3-2) of the cartridge receiver through the first pin shaft (5-4), the middle part of the upper end face of the baffle plate (5-1) is provided with the connecting lug (5-2), and the connecting lug (5-2) is connected with the connecting rod mechanism through the first pin shaft (5-4).
4. A reversible power turbine rotary mechanism system according to claim 3, wherein: the upper end face of one side of the baffle plate (5-1) is outwards extended to form a second boss (5-5), the right end face of the inner sleeve (3-2) of the casing is provided with a first step, the lower end face of the other side of the baffle plate (5-1) is outwards extended to form a third boss (5-7), the left end face of the front casing (9) is provided with a second step, when the switching valve (5) is overlapped with the inner wall of the front casing (9), the second boss (5-5) of the baffle plate (5-1) is in sealing fit with the first step side face (3-5) of the inner sleeve (3-2) of the casing, the upper end face of the other side of the baffle plate (5-1) is in sealing fit with the second step side face (9-1) of the front casing (9), and the third boss (5-7) of the baffle plate (5-1) is in sealing fit with the second step bottom face (9-2) of the front casing (9).
5. A reversible power turbine rotary mechanism system as claimed in claim 4, wherein: the lower end face of one side of the baffle plate (5-1) is outwards extended to form a fourth boss (5-6), the right side of the inner casing (4) is of a conical closed structure, and when the switching valve (5) is overlapped with the outer wall of the inner casing (4), the fourth boss (5-6) of the baffle plate (5-1) is in sealing fit with the right inner wall of the inner casing sleeve (3-2), and the lower end face of the right side of the baffle plate (5-1) is in sealing fit with the right conical surface of the inner casing (4).
6. A reversible power turbine rotary mechanism system as claimed in claim 1, wherein: when all the switching valves (5) are overlapped with the outer wall of the inner casing (4), a closed conical surface structure is formed among the switching valves (5), at the moment, the outer duct (Q) is opened, and the inner duct (P) is closed.
7. A reversible power turbine rotary mechanism system as claimed in claim 1, wherein: when all the switching valves (5) are overlapped with the inner wall of the front casing (9), the switching valves (5) are sequentially arranged at a plurality of concave positions of the middle casing (6) to form a closed cylindrical surface structure, at the moment, the inner culvert (P) is opened, and the outer culvert (Q) is closed.
8. A reversible power turbine rotary mechanism system as claimed in claim 1, wherein: the connecting rod mechanism comprises a first connecting rod (7), a second connecting rod (8) and a second pin shaft (11), one end of the first connecting rod (7) is installed on a concave shaft hole (6-5) of the convex cover (6-4) through the second pin shaft (11), the first connecting rod (7) is fixedly connected with a corresponding electric cylinder output shaft through the second pin shaft (11), the other end of the first connecting rod (7) is rotationally connected with one end of the second connecting rod (8) through the second pin shaft (11), and the other end of the second connecting rod (8) is rotationally connected with a connecting lug (5-2) of the switching valve (5) through the second pin shaft (11).
9. A reversible power turbine rotary mechanism system as claimed in claim 1, wherein: the blades in the movable blade disc (1) are of a double-layer structure, the movable blade disc (1) comprises a forward moving blade (1-1) and a reverse moving blade (1-2), the forward moving blade (1-1) is arranged on the inner ring of the lower portion of the movable blade disc (1), the reverse moving blade (1-2) is arranged on the outer ring of the upper portion of the movable blade disc (1), and the blade profile of the reverse moving blade (1-2) is reverse to that of the forward moving blade (1-1).
10. A reversible power turbine rotary mechanism system as claimed in claim 1, wherein: the blades of the nozzle ring (2) are of a double-layer structure, the nozzle ring (2) comprises positive stationary blades (2-1) and reversing stationary blades (2-2), the positive stationary blades (2-1) are arranged on the inner ring of the lower portion of the nozzle ring (2), the positive stationary blades (2-1) are matched with the positive moving blades (1-1), reversing stationary blades (2-2) are arranged on the outer ring of the upper portion of the nozzle ring (2), the reversing stationary blades (2-2) are opposite to the blade profile of the positive stationary blades (2-1), and the reversing stationary blades (2-2) are matched with the reversing moving blades (1-2).
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| CN201911047379.0A CN110617148B (en) | 2019-10-30 | 2019-10-30 | Reversing power turbine rotating mechanism system |
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| CN110617148B true CN110617148B (en) | 2024-04-16 |
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| CN112678193B (en) * | 2020-12-30 | 2023-06-02 | 中国航发沈阳发动机研究所 | Circumferential adjusting mechanism for pull rod of aero-engine |
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| CN85201257U (en) * | 1985-04-01 | 1986-03-19 | 上海交通大学 | Turning power turbine forth and back through hoop-belt and valve |
| US4884407A (en) * | 1987-10-28 | 1989-12-05 | Isuzu Motors Limited | Turbo compound engine |
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