High and medium pressure cylinder structure of turboset

Abstract

The utility model relates to the technical field of high and medium pressure cylinder structures, and discloses a turboset high and medium pressure cylinder structure which comprises a half cylinder, first hinge frames which are evenly distributed are fixedly connected to the outer side of the bottom end of the half cylinder, connecting columns are fixedly connected to the bottom ends of the first hinge frames, and transmission columns are fixedly connected to the bottom ends of the connecting columns. A silica gel ring is fixedly connected to the bottom end of the transmission column, a friction cylinder is slidably connected to the outer side of the silica gel ring, a protective shell is slidably connected to the outer side of the connecting column, and a spring is fixedly connected to the bottom end of the inner side of the protective shell. According to the damping device, the half cylinder, the connecting column, the protective shell, the second hinge frame, the transmission column, the silica gel ring, the friction cylinder and the spring are matched with one another, so that vibration generated in the operation process of equipment is damped; therefore, the situations of mechanical abrasion of internal parts of the steam turbine, fatigue damage of metal parts and the like possibly caused by vibration are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of high and medium pressure cylinder structures, in particular to a high and medium pressure cylinder structure of a steam turbine unit. Background Art

[0002] A steam turbine is a thermodynamic mechanical device that can convert steam energy into mechanical energy. It is usually composed of high, medium and low pressure cylinders, among which the high, medium and low pressure cylinders are arranged in sequence. As a key component of the steam turbine, the structural design of the high and medium pressure cylinders directly affects the performance and efficiency of the steam turbine.

[0003] After searching, the existing patent (publication number: CN212892519U) discloses a high and medium pressure cylinder structure of a steam turbine unit, including a lower shell, an upper shell is set just above the lower shell, the lower shell and the opposite side wall edges are fixedly connected with side plates, the side plates on the lower shell are provided with side grooves at the top and near the edges, the side plates on the upper shell and the side walls opposite to the side grooves are fixedly connected with sealing strips, a sleeve rod is set between the two side plates, a screw is inserted in the sleeve rod, and threaded grooves are set on the outer walls at both ends of the screw. The utility model has the following advantages: when the lower shell and the upper shell are closed, the sealing strip will be inserted into the side groove, and the positioning plate will be stuck in the corresponding groove by squeezing, thereby improving the stability of the connection between the sealing strip and the side groove, thereby improving the sealing performance after the lower shell and the upper shell are closed.

[0004] However, in the above scheme, vibrations will be generated during actual use of the steam turbine, and after a long period of use, the vibrations may cause additional wear between the internal parts of the steam turbine. This may shorten the service life of the parts, increase the frequency of maintenance and repairs, thereby increasing operating costs, and may also cause imbalance of the rotating parts within the steam turbine, which may damage bearings and seals in the long run. In addition, imbalance may also cause alignment problems, so that the rotating parts cannot rotate on their designed axis, thereby reducing the service life of the steam turbine.

[0005] In view of this, the utility model proposes a high and medium pressure cylinder structure of a steam turbine unit. Utility Model Content

[0006] The utility model provides a high and medium pressure cylinder structure of a steam turbine unit, which solves the problem in the related art that vibration may reduce the service life of the steam turbine.

[0007] The technical solution of the utility model is as follows: A high and medium pressure cylinder structure of a steam turbine unit, comprising a half cylinder, a first articulated frame evenly distributed is fixedly connected to the outer side of the bottom end of the half cylinder, a connecting column is fixedly connected to the bottom end of the first articulated frame, a transmission column is fixedly connected to the bottom end of the connecting column, a silicone ring is fixedly connected to the bottom end of the transmission column, a friction cylinder is slidably connected to the outer side of the silicone ring, a protective shell is slidably connected to the outer side of the connecting column, a spring is fixedly connected to the bottom end of the inner side of the protective shell, the spring is fixedly connected to the connecting column, the bottom end of the protective shell is fixedly connected to a second articulated frame, and the bottom end of the second articulated frame is fixedly connected to a base.

[0008] Preferably, a first sealing plate which is opposite to each other up and down is fixedly connected to the top of the base, and the inner side of the first sealing plate is clamped and connected with bolts which are evenly distributed.

[0009] Preferably, the first sealing plate is fixedly connected to the half-cylinder, and a sound insulation layer is fixedly connected to the inner side of the half-cylinder.

[0010] Preferably, left and right steam seals are fixedly connected to the inner side of the half cylinder.

[0011] Preferably, a limiting bin is fixedly connected to the inner side of the sound insulation layer, and a conveying pipe is fixedly connected to the top of the limiting bin.

[0012] Preferably, the front end of the delivery pipe is fixedly connected to a heat insulation box, and the rear end inside the heat insulation box is fixedly connected to a limiting frame.

[0013] Preferably, a motor is fixedly connected to the front side of the right end of the limiting frame, and a double gear is fixedly connected to the output end of the motor.

[0014] Preferably, the left side of the double gear is meshedly connected with a gear ring, and the front end of the gear ring is rotatably connected with evenly distributed transmission rods.

[0015] Preferably, a second sealing plate is rotatably connected to the inner side of the transmission rod, and a limiting ring is rotatably connected to the outer side of the second sealing plate.

[0016] Preferably, the front end of the limiting ring is fixedly connected to a diversion pipe, the inner side of the front end of the diversion pipe is fixedly connected to a connecting pipe, the bottom end of the connecting pipe is fixedly connected to a heating pipe, and the outer side of the heating pipe is fixedly connected to a water outlet pipe.

[0017] The working principle and beneficial effects of the utility model are:

[0018] 1. The utility model realizes the vibration reduction treatment of the vibration generated during the operation of the equipment by the arrangement of the half cylinder, the connecting column, the protective shell, the second hinge frame, the transmission column, the silicone ring, the friction cylinder and the spring, thereby avoiding the mechanical wear of the internal parts of the steam turbine and the fatigue damage of the metal parts caused by the vibration;

[0019] 2. In the utility model, some high-temperature steam is diverted from the delivery pipe through the diverter pipe, and then diverted into the connecting pipe and the heating pipe through the diverter pipe. By winding the heating pipe between the limit bin and the sound insulation layer, the sound insulation layer and the limit bin can raise the temperature faster, thereby avoiding the different degrees of thermal expansion of the components inside and outside the high and medium pressure cylinders due to the large temperature difference between the inside and outside, which may aggravate the thermal stress of the components. The sharp temperature difference between the high temperature area and the low temperature area may cause uneven distribution of thermal stress in the blades, blade roots and other key components, increasing the risk of fatigue damage to these components. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] Figure 1 This is a schematic diagram of the front three-dimensional structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the sound insulation layer of the utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the delivery pipe of the utility model;

[0024] Figure 4 This is a schematic diagram of the gear ring structure of the utility model;

[0025] Figure 5 It is a schematic diagram of the cross-sectional structure of the protective shell of the utility model.

[0026] In the figure: 1. half cylinder; 2. first sealing plate; 3. bolt; 4. first articulated frame; 5. base; 6. connecting column; 7. protective shell; 8. second articulated frame; 9. transmission column; 10. silicone ring; 11. friction cylinder; 12. spring; 13. sound insulation layer; 14. delivery pipe; 15. heat insulation box; 16. limit frame; 17. motor; 18. double gear; 19. gear ring; 20. transmission rod; 21. limit ring; 22. second sealing plate; 23. shunt pipe; 24. connecting pipe; 25. heating pipe; 26. water outlet pipe; 27. steam seal; 28. limit bin. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example 1

[0029] A preferred embodiment of the high and medium pressure cylinder structure of a steam turbine unit provided by the utility model is as follows Figures 1 to 5 As shown: a high and medium pressure cylinder structure of a steam turbine unit, including a half cylinder 1, a uniformly distributed first articulated frame 4 is fixedly connected to the outer side of the bottom end of the half cylinder 1, a connecting column 6 is fixedly connected to the bottom end of the first articulated frame 4, the half cylinder 1 and the connecting column 6 are connected through the first articulated frame 4, a transmission column 9 is fixedly connected to the bottom end of the connecting column 6, a silicone ring 10 is fixedly connected to the bottom end of the transmission column 9, the connecting column 6 and the silicone ring 10 are connected through the transmission column 9, a friction cylinder 11 is slidably connected to the outer side of the silicone ring 10, and a friction cylinder 11 is slidably connected to the silicone ring 10 and the friction cylinder 11 is connected between the silicone ring 10 and the friction cylinder 11 The larger friction force converts the tension and pressure generated by the vibration into heat, thereby reducing the vibration. A protective shell 7 is slidably connected to the outer side of the connecting column 6, and the internal structure is protected by the protective shell 7. A spring 12 is fixedly connected to the bottom end of the inner side of the protective shell 7. The spring 12 is fixedly connected to the connecting column 6. The spring 12 pushes the connecting column 6 upward with the protective shell 7 as the stress point. A second hinged frame 8 is fixedly connected to the bottom end of the protective shell 7. The bottom end of the second hinged frame 8 is fixedly connected to the base 5. The protective shell 7 and the base 5 are connected via the second hinged frame 8.

[0030] In this embodiment, the top of the base 5 is fixedly connected with a first sealing plate 2 which is opposite to each other up and down. The inner side of the first sealing plate 2 is clamped and connected with evenly distributed bolts 3. The upper and lower first sealing plates 2 are fixed by the bolts 3, so that the half cylinder 1 is fixed and sealed by the first sealing plate 2.

[0031] In this embodiment, the first sealing plate 2 is fixedly connected to the half cylinder 1, and a sound insulation layer 13 is fixedly connected to the inner side of the half cylinder 1. The sound insulation layer 13 is used to isolate the internal noise, thereby reducing the impact of the noise on the outside.

[0032] In this embodiment, steam seals 27 opposite to each other are fixedly connected to the inner side of the half cylinder 1. The steam seals 27 are used to seal the main shaft and the cylinder body, thereby preventing steam leakage during use.

[0033] Example 2

[0034] Based on Example 1, a preferred embodiment of a high and medium pressure cylinder structure of a steam turbine unit provided by the utility model is as follows: Figures 1 to 5 As shown: a limiting bin 28 is fixedly connected to the inner side of the sound insulation layer 13 , a delivery pipe 14 is fixedly connected to the top of the limiting bin 28 , and steam is delivered into the limiting bin 28 through the delivery pipe 14 .

[0035] In this embodiment, the front end of the delivery pipe 14 is fixedly connected to a heat insulation box 15, and the rear end of the inner side of the heat insulation box 15 is fixedly connected to a limiting frame 16. The heat insulation box 15 is used to insulate the internal structure, thereby reducing the impact of high temperature on the internal structure.

[0036] In this embodiment, a motor 17 is fixedly connected to the front side of the right end of the limiting frame 16 , and a double gear 18 is fixedly connected to the output end of the motor 17 , so that the double gear 18 is driven to rotate by the motor 17 .

[0037] In this embodiment, the left side of the double gear 18 is meshed with a gear ring 19, and the front end of the gear ring 19 is rotatably connected to a uniformly distributed transmission rod 20. The gear ring 19 is driven to rotate by the double gear 18, and the transmission rod 20 is also driven to rotate by the gear ring 19.

[0038] In this embodiment, the second sealing plate 22 is rotatably connected to the inner side of the transmission rod 20, and the second sealing plate 22 is rotatably connected to the outer side of the second sealing plate 21. The second sealing plate 22 is driven to rotate by the transmission rod 20, but at the same time, one end of the second sealing plate 22 is fixed by the limiting ring 21, so the second sealing plate 22 can only rotate at a fixed point to achieve opening and closing.

[0039] In this embodiment, a diverter pipe 23 is fixedly connected to the front end of the limit ring 21, and the flow rate and flow of steam entering the diverter pipe 23 are controlled by opening and closing the second sealing plate 22. A connecting pipe 24 is fixedly connected to the inner side of the front end of the diverter pipe 23, and the steam is diverted into the connecting pipe 24 through the diverter pipe 23. A heating pipe 25 is fixedly connected to the bottom end of the connecting pipe 24, and a water outlet pipe 26 is fixedly connected to the outer side of the heating pipe 25. The steam is transported into the heating pipe 25 through the connecting pipe 24, and is heated by the inside of the heating pipe 25, thereby accelerating the increase in the internal temperature of the half cylinder 1.

[0040] The working principle and use process of the utility model are as follows: in the actual use of the high and medium pressure cylinder structure of the steam turbine unit, first, when the equipment is turned on, the high-temperature steam is transported into the limit bin 28 through the delivery pipe 14 to drive the impeller in the limit bin 28, and then the motor 17 is used to drive the gear ring 19 to rotate by using the double gear 18, and at the same time, the gear ring 19 drives the transmission rod 20 to rotate, and then the gear ring 19 is used to control the opening and closing of the second sealing plate 22, thereby controlling the amount of high-temperature steam diverted from the delivery pipe 14, and the diverted high-temperature steam is diverted into the connecting pipes 24 on the left and right sides through the diverter pipe 23, and then through The high-temperature steam is transported into the heating pipe 25 through the connecting pipe 24 to heat the limit bin 28, the sound insulation layer 13 and the half cylinder 1, thereby increasing the heating speed of the equipment and avoiding the components inside and outside the high and medium pressure cylinders from being subjected to different degrees of thermal expansion due to the large temperature difference, thereby affecting the normal use of the steam turbine. Afterwards, when the equipment is running, the vibration generated inside the half cylinder 1 is transmitted to the connecting column 6 through the first articulated frame 4, and then transmitted to the protective shell 7 and the silicone ring 10 through the connecting column 6. Then, through the large friction between the silicone ring 10 and the friction cylinder 11, the tension and pressure generated by the vibration are converted into heat energy, thereby reducing the vibration.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high and medium pressure cylinder structure of a steam turbine unit, comprising a half cylinder (1), characterized in that: The outer side of the bottom end of the half cylinder (1) is fixedly connected to a uniformly distributed first articulated frame (4), the lower end of the first articulated frame (4) is fixedly connected to a connecting column (6), the lower end of the connecting column (6) is fixedly connected to a transmission column (9), the lower end of the transmission column (9) is fixedly connected to a silicone ring (10), the outer side of the silicone ring (10) is slidably connected to a friction cylinder (11), the outer side of the connecting column (6) is slidably connected to a protective shell (7), the inner bottom end of the protective shell (7) is fixedly connected to a spring (12), the spring (12) is fixedly connected to the connecting column (6), the lower end of the protective shell (7) is fixedly connected to a second articulated frame (8), and the lower end of the second articulated frame (8) is fixedly connected to a base (5).

2. A high and medium pressure cylinder structure of a steam turbine unit according to claim 1, characterized in that: The top of the base (5) is fixedly connected to a first sealing plate (2) which is opposite to the top and bottom, and the inner side of the first sealing plate (2) is clamped and connected with bolts (3) which are evenly distributed.

3. A high and medium pressure cylinder structure of a steam turbine unit according to claim 2, characterized in that: The first sealing plate (2) is fixedly connected to the half cylinder (1), and a sound insulation layer (13) is fixedly connected to the inner side of the half cylinder (1).

4. The high and medium pressure cylinder structure of a steam turbine unit according to claim 1, characterized in that: Left and right steam seals (27) are fixedly connected to the inner side of the half cylinder (1).

5. The high and medium pressure cylinder structure of a steam turbine unit according to claim 3, characterized in that: The inner side of the sound insulation layer (13) is fixedly connected to a limiting bin (28), and the top of the limiting bin (28) is fixedly connected to a conveying pipe (14).

6. A high and medium pressure cylinder structure of a steam turbine unit according to claim 5, characterized in that: The front end of the delivery pipe (14) is fixedly connected to a heat insulation box (15), and the rear end inside the heat insulation box (15) is fixedly connected to a limiting frame (16).

7. A high and medium pressure cylinder structure of a steam turbine unit according to claim 6, characterized in that: The front side of the right end of the limiting frame (16) is fixedly connected to a motor (17), and the output end of the motor (17) is fixedly connected to a double gear (18).

8. A high and medium pressure cylinder structure of a steam turbine unit according to claim 7, characterized in that: The left side of the double gear (18) is meshedly connected with a gear ring (19), and the front end of the gear ring (19) is rotatably connected with evenly distributed transmission rods (20).

9. A high and medium pressure cylinder structure of a steam turbine unit according to claim 8, characterized in that: The transmission rod (20) is rotatably connected to a second sealing plate (22) on the inner side, and the second sealing plate (22) is rotatably connected to a limiting ring (21) on the outer side.

10. A high and medium pressure cylinder structure of a steam turbine unit according to claim 9, characterized in that: The front end of the limiting ring (21) is fixedly connected to a shunt pipe (23), the inner side of the front end of the shunt pipe (23) is fixedly connected to a connecting pipe (24), the bottom end of the connecting pipe (24) is fixedly connected to a heating pipe (25), and the outer side of the heating pipe (25) is fixedly connected to a water outlet pipe (26).

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