Adjusting structure for steam distribution nozzle of steam turbine

Abstract

The utility model discloses a steam turbine steam distribution nozzle adjusting structure which comprises four adjusting valve pipes distributed below a steam supply main pipeline, a steam turbine steam chamber is arranged below the steam supply main pipeline, and a plurality of rotor impellers fixedly connected to the surface of a steam turbine rotor are arranged in an inner cavity of the steam turbine steam chamber. An inner cavity of the adjusting valve pipe is fixedly connected with a lining pipe, and an inner cavity of the lining pipe is provided with a quantity control assembly. The steam supply main pipeline, the adjusting valve pipe and the communicating pipe are used in cooperation, steam is conveyed to the inner cavity of the steam chamber of the steam turbine and acts on the surface of the rotor impeller through a steam turbine nozzle piece (steam turbine stationary blades), so that the rotor impeller drives a steam turbine rotor to rotate, and meanwhile the quantity control assembly and the driving assembly are used in cooperation, so that the steam turbine is more stable. And the circulation state and the flow of the steam in the inner cavity of the adjusting valve pipe can be controlled, so that the purposes of adjusting the steam distribution state and controlling the steam distribution flow can be achieved.

Description

Technical Field

[0001] This utility model belongs to the field of steam turbine steam distribution technology, and in particular relates to a steam turbine steam distribution nozzle adjustment structure. Background Technology

[0002] Steam turbine distribution refers to the process of rationally distributing the steam entering the steam turbine to various cylinders or nozzle groups according to the operating conditions and load requirements of the steam turbine, so as to achieve the purpose of steam turbine power output, speed control and efficiency optimization. During the operation of the steam turbine, the steam distribution mechanism is used to distribute the steam. The steam distribution mechanism is usually composed of components such as regulating valves and nozzle groups.

[0003] Steam turbines, as important power equipment that converts the thermal energy of steam into mechanical energy, are widely used in power generation, industrial drives, and many other fields. In order to cope with changes in external loads or to accurately control the power output of steam turbines under different load conditions and match them with external load demands, it is necessary to optimize the flow and work process of steam within the steam turbine through reasonable steam distribution, reduce steam throttling losses and residual velocity losses, and improve the thermal efficiency of the steam turbine. To this end, it is necessary to provide a steam turbine steam distribution nozzle adjustment structure that adopts multiple steam distribution pipes that can be opened and closed independently, and the steam flow of a single steam distribution pipe can be adjusted independently. This expands the adjustment level of steam distribution demand, thereby enabling more precise distribution of steam flow. Utility Model Content

[0004] The purpose of this invention is to provide a steam turbine steam distribution nozzle adjustment structure that uses multiple steam distribution pipes that can be opened and closed individually, and the steam flow rate of a single steam distribution pipe can be adjusted independently. This expands the adjustment levels for steam distribution demand, thereby enabling more precise distribution of steam flow and solving the aforementioned technical problems.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A steam turbine steam distribution nozzle adjustment structure includes four regulating valve pipes distributed below the main steam supply pipeline; a steam turbine steam chamber is arranged below the main steam supply pipeline; multiple rotor impellers are fixedly connected to the surface of the steam turbine rotor in the inner cavity of the steam turbine steam chamber; an inner liner pipe is fixedly connected to the inner cavity of the regulating valve pipe; a control component is arranged in the inner cavity of the inner liner pipe; the control component includes a sliding sleeve slidably connected to the inner cavity of the inner liner pipe; multiple gas channels are annularly distributed at the bottom of the surface of the sliding sleeve; a conical pressure plate is fixedly connected to the surface of the sliding sleeve; a sealing pressure member is fixedly connected to the surface of the conical pressure plate; a sealing kit adapted to the sealing pressure member is fixedly connected to the bottom of the inner wall of the regulating valve pipe; and a drive component is arranged on the front side of the regulating valve pipe.

[0006] Preferably, the drive assembly includes a rotating shaft extending from the front side of the self-regulating valve tube to the rear side of the regulating valve tube, a swinging element fixedly connected to the surface of the rotating shaft, and two connecting plates rotatably connected to the top of the sliding sleeve, with the top ends of both connecting plates rotatably connected to the swinging element.

[0007] Preferably, the surface of the rotating shaft is rotatably connected to the regulating valve tube via a sealing bushing. A stepper motor is fixedly installed at the right end of the front side of the regulating valve tube. The front end of the rotating shaft passes through to the front side of the regulating valve tube and is fixedly connected to a worm gear. The output shaft of the stepper motor is fixedly connected to a worm, and the worm meshes with the worm gear.

[0008] Preferably, the top end of the regulating valve pipe is connected to the main steam supply pipeline via a tee pipe, and the bottom end of the regulating valve pipe is connected to a connecting pipe, the bottom end of which is connected to the steam chamber of the steam turbine.

[0009] Preferably, a gearbox is fixedly connected to the front side of the regulating valve pipe, and the rotating shaft and worm gear are rotatably connected to the gearbox.

[0010] The beneficial effects of this utility model are:

[0011] 1. This utility model uses the combined use of the main steam supply pipeline, regulating valve pipe and connecting pipe to deliver steam to the inner cavity of the steam chamber of the steam turbine. The steam is then delivered to the surface of the rotor impeller by the steam turbine nozzle blades (steam turbine stationary blades), causing the rotor impeller to drive the steam turbine rotor to rotate. At the same time, the combined use of the control component and the drive component can control the steam flow state and flow rate in the inner cavity of the regulating valve pipe, thereby achieving the purpose of adjustable steam distribution state and controllable steam distribution flow rate.

[0012] 2. This utility model, through the setting of the drive component, wherein the stepper motor drives the rotating shaft to rotate, and drives the swinging component to rotate, so that the swinging component can lift or push the connecting plate, thereby allowing the conical pressure plate to move vertically up and down in the inner cavity of the inner liner tube, thereby closing or opening the bottom of the regulating valve tube and controlling the flow of gas.

[0013] 3. By setting up a connecting pipe, the gas transported in the inner cavity of the self-regulating valve pipe can be discharged into the inner cavity of the steam chamber of the steam turbine, and at the same time, the gas acts on the surface of the rotor impeller, thereby generating thrust on the rotor impeller. Attached Figure Description

[0014] in:

[0015] Figure 1 This is a front cross-sectional view of one embodiment of the present invention;

[0016] Figure 2This is one embodiment of the present utility model. Figure 1 A magnified view of point A in the middle;

[0017] Figure 3 This is a perspective view of a regulating valve tube and a drive assembly according to an embodiment of the present invention;

[0018] Figure 4 This is an exploded perspective view of the regulating valve tube, the quantity control component, and the drive component according to one embodiment of the present invention.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Main steam supply pipeline; 2. Regulating valve pipe; 3. Steam chamber of steam turbine; 4. Connecting pipe; 5. Rotor impeller; 6. Liner pipe; 7. Quantity control component; 71. Sliding sleeve; 72. Gas passage; 73. Conical pressure plate; 74. Sealing pressure component; 75. Sealing kit; 8. Drive component; 81. Rotating shaft; 82. Swinging component; 83. Connecting plate; 84. Stepper motor; 85. Worm gear; 86. Worm; 9. Gearbox. Detailed Implementation

[0021] In the following description, embodiments of the turbine steam distribution nozzle adjustment structure of the present invention will be described with reference to the accompanying drawings.

[0022] Figure 1-4This invention illustrates a turbine steam distribution nozzle adjustment structure according to an embodiment of the present invention, comprising four regulating valve pipes 2 distributed below the main steam supply pipeline 1. A turbine steam chamber 3 is located below the main steam supply pipeline 1. The top end of the regulating valve pipe 2 is connected to the main steam supply pipeline 1 via a tee pipe, and the bottom end of the regulating valve pipe 2 is connected to a connecting pipe 4. The bottom end of the connecting pipe 4 is connected to the turbine steam chamber 3. Through the connection pipe 4, the steam transported from the inner cavity of the regulating valve pipe 2 can be discharged into the inner cavity of the turbine steam chamber 3, and at the same time, the steam acts on the surface of the rotor impeller 5, thereby generating thrust on the rotor impeller 5. The inner cavity of the steam chamber 3 is provided with multiple rotor impellers 5 fixedly connected to the surface of the steam turbine rotor. The inner cavity of the regulating valve pipe 2 is fixedly connected with an inner liner pipe 6. The inner cavity of the inner liner pipe 6 is provided with a flow control component 7. The flow control component 7 includes a sliding sleeve 71 slidably connected to the inner cavity of the inner liner pipe 6. Multiple gas channels 72 are distributed in a ring at the bottom of the surface of the sliding sleeve 71. A conical pressure plate 73 is fixedly connected to the surface of the sliding sleeve 71. A sealing pressure element 74 is fixedly connected to the surface of the conical pressure plate 73. A sealing kit 75 adapted to the sealing pressure element 74 is fixedly connected to the bottom of the inner wall of the regulating valve pipe 2. The front side of the regulating valve pipe 2 is provided with A drive assembly 8 includes a rotating shaft 81 extending from the front side of the self-regulating valve tube 2 to the rear side of the regulating valve tube 2. A swing element 82 is fixedly connected to the surface of the rotating shaft 81. Two connecting plates 83 are rotatably connected to the top of the sliding sleeve 71, and the top ends of both connecting plates 83 are rotatably connected to the swing element 82. The surface of the rotating shaft 81 is rotatably connected to the regulating valve tube 2 through a sealing bushing. A stepper motor 84 is fixedly installed at the right end of the front side of the regulating valve tube 2. A worm gear 85 is fixedly connected to the front end of the rotating shaft 81 extending to the front side of the regulating valve tube 2. A worm is fixedly connected to the output shaft of the stepper motor 84. 86. The worm 86 meshes with the worm wheel 85. Through the setting of the drive assembly 8, driven by the stepper motor 84 and with the cooperation of the worm wheel 85 and the worm 86, the rotating shaft 81 can be driven to rotate, and the swinging component 82 can be driven to rotate, so that the swinging component 82 can lift or push the connecting plate 83, thereby allowing the conical pressure plate 73 to move vertically up and down in the inner cavity of the inner liner tube 6, thereby closing or opening the bottom of the regulating valve tube 2 to control the flow of gas. The front side of the regulating valve tube 2 is fixedly connected to the gearbox 9, and the rotating shaft 81 and the worm 86 are rotatably connected to the gearbox 9.

[0023] Working Principle: In use, the user supplies steam into the inner cavity of the regulating valve pipe 2 through the main steam supply pipe 1. After entering the inner cavity of the regulating valve pipe 2, the gas exits through the inner cavity of the steam passage 72 into the inner cavity of the connecting pipe 4, and passes through the turbine nozzle blades (turbine stationary blades), acting on the surface of the rotor impeller 5. This causes the rotor impeller 5 to rotate under thrust, which in turn drives the turbine rotor to rotate. When distributing steam to the turbine, the stepper motor 84 is activated, driving the worm gear 86 to rotate within the gearbox 9. Under the meshing transmission of the worm gear 86 and the worm wheel 85, the rotating shaft 81 rotates within the inner cavity of the regulating valve pipe 2, driving the oscillating component 82 to rotate. This causes the oscillating component 82 to rotate against the connecting plate 8. 3. Pushing down causes the sliding sleeve 71 to slide the conical pressure plate 73 downwards. At this time, part of the space in the gas passage 72 is covered by the inner wall of the regulating valve pipe 2, reducing the gas flow rate and thus achieving the purpose of controlling the gas flow rate. After the swinging part 82 rotates to the position, the connecting plate 83 drives the sliding sleeve 71 to move down to the maximum depth. At this time, the conical pressure plate 73 fits against the inner wall of the regulating valve pipe 2, and the sealing pressure part 74 and the sealing kit 75 are squeezed and fitted together, completely sealing the inner cavity of the regulating valve pipe 2 and stopping the current regulating valve pipe 2 from supplying gas to the inner cavity of the steam chamber 3 of the turbine. The user can adjust the gas flow rate of the inner cavity of a single regulating valve pipe 2 according to the usage requirements, and can also open or completely close a single regulating valve pipe 2.

[0024] In summary, this steam turbine steam distribution nozzle regulating structure, through the combined use of the main steam supply pipeline 1, regulating valve pipe 2, and connecting pipe 4, delivers steam to the inner cavity of the steam chamber 3 of the steam turbine. The steam is then delivered to the surface of the rotor impeller 5 via the steam turbine nozzle blades and the turbine stationary blades, causing the rotor impeller 5 to drive the steam turbine rotor to rotate. Simultaneously, with the combined use of the control component 7 and the drive component 8, the steam flow state and flow rate in the inner cavity of the regulating valve pipe 2 can be controlled, thus achieving the purpose of adjustable steam distribution state and controllable steam distribution flow rate.

Claims

1. A steam turbine steam distribution nozzle adjustment structure, characterized in that, The system includes four regulating valve pipes (2) distributed below the main steam supply pipeline (1): a steam turbine steam chamber (3) is provided below the main steam supply pipeline (1), and multiple rotor impellers (5) are fixedly connected to the surface of the steam turbine rotor in the inner cavity of the steam turbine steam chamber (3). An inner liner pipe (6) is fixedly connected to the inner cavity of the regulating valve pipe (2), and a flow control component (7) is provided in the inner cavity of the inner liner pipe (6). The flow control component (7) includes a sliding sleeve (71) slidably connected to the inner cavity of the inner liner pipe (6). Multiple gas channels (72) are distributed in a ring at the bottom of the surface of the sliding sleeve (71). A conical pressure plate (73) is fixedly connected to the surface of the sliding sleeve (71). A sealing pressure member (74) is fixedly connected to the surface of the conical pressure plate (73). A sealing kit (75) adapted to the sealing pressure member (74) is fixedly connected to the bottom of the inner wall of the regulating valve pipe (2). A drive component (8) is provided on the front side of the regulating valve pipe (2).

2. The turbine steam distribution nozzle adjustment structure according to claim 1, characterized in that, The drive assembly (8) includes a rotating shaft (81) extending from the front side of the self-regulating valve tube (2) to the rear side of the regulating valve tube (2). A swinging member (82) is fixedly connected to the surface of the rotating shaft (81). Two connecting plates (83) are rotatably connected to the top of the sliding sleeve (71). The top ends of the two connecting plates (83) are rotatably connected to the swinging member (82).

3. The turbine steam distribution nozzle adjustment structure according to claim 2, characterized in that, The surface of the rotating shaft (81) is rotatably connected to the regulating valve tube (2) through a sealing bushing. A stepper motor (84) is fixedly installed on the right end of the front side of the regulating valve tube (2). The front end of the rotating shaft (81) extends through to the front side of the regulating valve tube (2) and is fixedly connected to a worm gear (85). The output shaft of the stepper motor (84) is fixedly connected to a worm (86), and the worm (86) meshes with the worm gear (85).

4. The turbine steam distribution nozzle adjustment structure according to claim 3, characterized in that, The top end of the regulating valve pipe (2) is connected to the main steam supply pipe (1) through a three-way pipe, and the bottom end of the regulating valve pipe (2) is connected to a connecting pipe (4), the bottom end of the connecting pipe (4) is connected to the steam chamber (3) of the steam turbine.

5. The turbine steam distribution nozzle adjustment structure according to claim 4, characterized in that, The front side of the regulating valve pipe (2) is fixedly connected to a gearbox (9), and the rotating shaft (81) and the worm gear (86) are rotatably connected to the gearbox (9).

Images