Special temperature and pressure reducing device for steam turbine shaft seal
By designing a special temperature and pressure reduction device for the turbine shaft seal and using the pump body and piping system to adjust the steam pressure and temperature, the problem of unstable steam supply to the turbine shaft seal is solved, and the safety and operational stability of the equipment are improved.
Patent Information
- Application Number
- CN202422778366.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-11-14
AI Technical Summary
The existing steam supply pressure of the turbine shaft seal is unstable, resulting in excessive vibration during hot start-up and inability to start normally. In addition, frequent adjustments are required when the load changes in the thermal constant power mode, affecting the safety and economy of the equipment.
A special temperature and pressure reduction device for turbine shaft seal is designed. It includes a control mechanism and a regulating mechanism. The steam pressure and temperature are adjusted through the pump body and pipeline system. The steam generated by the steam boiler is adjusted by cold water to meet the requirements of the shaft seal.
It achieves stable control of steam pressure and temperature, improves the safety of turbine shaft seal and the operating stability of equipment, and avoids vibration and vacuum effects caused by pressure fluctuations.
Smart Images
Figure CN223344114U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of shaft seal steam supply, in particular to a special temperature and pressure reduction device for turbine shaft seal. Background Art
[0002] The turbine shaft seal refers to the sealing device installed on the turbine rotor. It mainly plays a sealing role to prevent the leakage of high-temperature and high-pressure steam inside the turbine and prevent outside air from leaking into the cylinder, thereby destroying the condenser vacuum, increasing the turbine exhaust pressure, and reducing the economic efficiency of the unit.
[0003] At present, the shaft seal of the steam turbine mainly supplies the new steam generated by the steam boiler directly to the shaft seal. The steam supply pressure is unstable. When the steam turbine is started in a hot state, the vibration of the steam turbine at the critical speed will exceed the standard, resulting in failure to start normally. The original shaft seal steam supply system cannot meet the requirements. When the operating load reception mode of the steam turbine is mainly in the thermal power mode, the steam supply pressure of the shaft seal needs to be frequently adjusted due to the large load of the steam turbine, which affects the vacuum of the steam turbine and seriously affects the safe operation of the equipment.
[0004] Therefore, in view of the above problems, it is necessary for the applicant to design a special temperature and pressure reduction device for turbine shaft seal to solve the problem. Summary of the Invention
[0005] The purpose of the utility model is to provide a special temperature and pressure reduction device for a steam turbine shaft seal, so as to solve the problems mentioned in the above background technology.
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a special temperature and pressure reduction device for a steam turbine shaft seal, comprising a base, wherein a base is fixedly provided on the top surface of the base, a steam boiler is fixedly provided on the top surface of the base, and the outlet end of the steam boiler is fixedly connected to a connecting tube via a flange.
[0007] The device further comprises: a control mechanism disposed above the base, the control mechanism comprising a connecting pipe fixedly connected to the connecting tube, wherein one end of the connecting pipe away from the connecting tube is fixedly connected to a control box fixedly connected to the base, and one side of the control box is fixedly connected to an air outlet pipe, and the air outlet pipe is provided with an electronic valve;
[0008] An adjustment mechanism is arranged above the base, and the adjustment mechanism includes a cache box fixedly connected to the base, and one side of the cache box is fixedly connected to a delivery pipe fixedly connected to the connecting pipe, and one side of the cache box is fixedly connected to a guide pipe, and the guide pipe is arranged inside the control box.
[0009] Furthermore, one side of the control box is fixedly connected to a water inlet pipe, and a first pump body is detachably mounted on the water inlet pipe.
[0010] With the above structural design, the first pump body is used to facilitate the input or discharge of water into or out of the sealed control box through the water inlet pipe, thereby facilitating the control of the air pressure inside the control box.
[0011] Furthermore, the bottom surface of the first pump body is fixedly connected to a stabilizing seat, and the bottom surface of the stabilizing seat is fixedly connected to the top surface of the base.
[0012] Through the above structural design, the stabilizing seat is used to facilitate supporting the first pump body, thereby improving the firmness and stability of the first pump body during operation.
[0013] Furthermore, the water outlet end of the delivery pipe is fixedly connected to a second pump body, the water outlet end of the second pump body is fixedly connected to a circulation pipe, and the circulation pipe is fixedly connected to the cache box.
[0014] Through the above structural design, the second pump body is used to facilitate the input of water into the cache box through the circulation pipe, so that the water circulates in the delivery pipe.
[0015] Furthermore, a support seat is fixedly provided on the bottom surface of the second pump body, and the bottom surface of the support seat is fixedly connected to the top surface of the base.
[0016] Through the above structural design, the support seat is used to facilitate supporting the second pump body, thereby improving the firmness and stability of the second pump body during operation.
[0017] Furthermore, one side of the cache box is fixedly connected with an input pipe and a drainage pipe, and both the input pipe and the drainage pipe are fixedly connected to an external water source.
[0018] Through the above structural design, the input pipe is used to easily input external cold water into the cache box, and the drainage pipe is used to easily drain the hot water in the cache box, thereby facilitating the control of the water temperature in the cache box.
[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the dedicated temperature and pressure reduction device for steam turbine shaft seal facilitates the adjustment of the pressure and temperature of steam generated by the steam boiler, thereby improving the safety of the steam turbine shaft seal. The specific contents are as follows:
[0020] 1. A control mechanism is provided. When in use, the water vapor produced by the steam boiler will enter the connecting pipe through the connecting tube, and the water vapor in the connecting pipe will enter the control box. At the same time, the first pump body is started, and the first pump body will absorb hot water from the outside into the control box through the water inlet pipe. Adjusting the amount of hot water delivered will facilitate controlling the pressure intensity in the control box, thereby facilitating the promotion of gas supply shaft seal under appropriate pressure intensity, with high safety.
[0021] 2. An adjusting mechanism is provided. When in use, the water vapor in the connecting pipe can easily enter the cache box through the delivery pipe. At the same time, the external cold water is input into the cache box through the input pipe or the hot water in the cache box is discharged through the drainage pipe, so as to facilitate the control of the water temperature in the cache box. The water in the cache box can easily enter the control box through the guide pipe. When the temperature in the control box is too high, the water temperature in the cache box is lowered, and the water flow in the guide pipe will facilitate the removal of heat in the control box, thereby facilitating the adjustment of the temperature suitable for the shaft seal, with high safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;
[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the control mechanism of the utility model;
[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the adjustment mechanism of the utility model;
[0025] Figure 4 For this utility model Figure 3 Schematic diagram of the structure enlarged at point A in the middle.
[0026] In the figure: 1. base; 2. control mechanism; 3. adjustment mechanism; 10. base; 11. steam boiler; 12. connecting cylinder; 20. connecting pipe; 21. control box; 22. water inlet pipe; 23. first pump body; 24. stabilizing seat; 25. air outlet pipe; 26. electronic valve; 30. cache box; 31. delivery pipe; 32. guide pipe; 33. second pump body; 34. circulation pipe; 35. support seat; 36. input pipe; 37. drainage pipe. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0028] like Figures 1-4As shown, the utility model is a special temperature and pressure reduction device for turbine shaft seal, comprising a base 1, and a base 10 is fixedly provided on the top surface of the base 1, a steam boiler 11 is fixedly provided on the top surface of the base 10, and the gas outlet end of the steam boiler 11 is fixedly connected to a connecting tube 12 through a flange, and also comprises: a control mechanism 2 arranged above the base 1, the control mechanism 2 includes a connecting pipe 20 fixedly connected to the connecting tube 12, and the end of the connecting pipe 20 away from the connecting tube 12 is fixedly connected to a control box 21 fixedly connected to the base 1, one side of the control box 21 is fixedly connected to an outlet pipe 25, and an electronic valve 26 is provided on the outlet pipe 25, one side of the control box 21 is fixedly connected to a water inlet pipe 22, and a first pump body 23 is detachably installed on the water inlet pipe 22, the bottom surface of the first pump body 23 is fixedly connected to a stabilizing seat 24, and the bottom surface of the stabilizing seat 24 is fixedly connected to the top surface of the base 1.
[0029] Through the above-mentioned structural design, when in use, the water vapor produced by the steam boiler 11 will enter the connecting pipe 20 through the connecting tube 12, and the water vapor in the connecting pipe 20 will enter the control box 21. At the same time, the first pump body 23 is started, and the first pump body 23 will absorb hot water from the outside and enter the control box 21 through the water inlet pipe 22. Adjusting the amount of hot water delivered will facilitate controlling the pressure intensity in the control box 21, thereby facilitating pushing the gas supply shaft seal under appropriate pressure intensity, with high safety.
[0030] An adjusting mechanism 3 is arranged above the base 1, and the adjusting mechanism 3 includes a cache box 30 fixedly connected to the base 1, and one side of the cache box 30 is fixedly connected to a delivery pipe 31 fixedly connected to the connecting pipe 20, one side of the cache box 30 is fixedly connected to a guide pipe 32, and the guide pipe 32 is arranged inside the control box 21, the water outlet end of the delivery pipe 31 is fixedly connected to the second pump body 33, the water outlet end of the second pump body 33 is fixedly connected to a circulation pipe 34, and the circulation pipe 34 is fixedly connected to the cache box 30, the bottom surface of the second pump body 33 is fixedly provided with a support seat 35, and the bottom surface of the support seat 35 is fixedly connected to the top surface of the base 1, one side of the cache box 30 is fixedly connected to an input pipe 36 and a drainage pipe 37, and the input pipe 36 and the drainage pipe 37 are both fixedly connected to an external water source.
[0031] Through the above-mentioned structural design, when in use, the water vapor in the connecting pipe 20 can easily enter the cache box 30 through the delivery pipe 31, and at the same time, the external cold water is input into the cache box 30 through the input pipe 36 or the hot water in the cache box 30 is discharged through the drainage pipe 37, so as to facilitate the control of the water temperature in the cache box 30, and the water in the cache box 30 can easily enter the control box 21 through the guide pipe 32. When the temperature in the control box 21 is too high, the water temperature in the cache box 30 is lowered, and the water flow in the guide pipe 32 will facilitate the removal of heat in the control box 21, thereby facilitating the adjustment of a temperature suitable for the use of the shaft seal, with high safety.
[0032] Working principle: When using the special cooling and pressure reduction device for turbine shaft seal, the water vapor produced by the steam boiler 11 will enter the connecting pipe 20 through the connecting tube 12, and the water vapor in the connecting pipe 20 will enter the control box 21. At the same time, the first pump body 23 will be started, and the first pump body 23 will absorb hot water from the outside into the control box 21 through the water inlet pipe 22. Adjusting the amount of water transported will facilitate the control of the pressure intensity in the control box 21. At the same time, the water vapor in the connecting pipe 20 will easily enter the cache box 30 through the delivery pipe 31. At the same time, the external cold water is input into the cache box 30 through the input pipe 36 or the hot water in the cache box 30 is discharged through the drainage pipe 37, so as to facilitate the control of the water temperature in the cache box 30. The water in the cache box 30 will easily enter the control box 21 through the guide pipe 32. When the temperature in the control box 21 is too high, the water temperature in the cache box 30 will be lowered, and the water flow in the guide pipe 32 will facilitate the removal of heat in the control box 21, thereby facilitating the promotion of gas supply to the shaft seal at an appropriate pressure intensity and temperature, with high safety.
[0033] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.
Claims
1. A temperature and pressure reduction device for a steam turbine shaft seal, comprising a base (1), wherein a base (10) is fixedly provided on the top surface of the base (1), a steam boiler (11) is fixedly provided on the top surface of the base (10), and an outlet end of the steam boiler (11) is fixedly connected to a connecting tube (12) via a flange. It is characterized in that Also includes: A control mechanism (2) is provided above the base (1), the control mechanism (2) comprising a connecting pipe (20) fixedly connected to the connecting cylinder (12), and one end of the connecting pipe (20) away from the connecting cylinder (12) is fixedly connected to a control box (21) fixedly connected to the base (1), one side of the control box (21) is fixedly connected to an air outlet pipe (25), and an electronic valve (26) is provided on the air outlet pipe (25); An adjusting mechanism (3) is arranged above the base (1), the adjusting mechanism (3) comprising a cache box (30) fixedly connected to the base (1), and one side of the cache box (30) is fixedly connected to a delivery pipe (31) fixedly connected to the connecting pipe (20), and one side of the cache box (30) is fixedly connected to a guide pipe (32), and the guide pipe (32) is arranged inside the control box (21).
2. A steam turbine shaft seal dedicated temperature and pressure reduction device according to claim 1, characterized in that: One side of the control box (21) is fixedly connected to a water inlet pipe (22), and a first pump body (23) is detachably mounted on the water inlet pipe (22).
3. The dedicated temperature and pressure reduction device for steam turbine shaft seal according to claim 2, characterized in that: The bottom surface of the first pump body (23) is fixedly connected to a stabilizing seat (24), and the bottom surface of the stabilizing seat (24) is fixedly connected to the top surface of the base (1).
4. The dedicated temperature and pressure reduction device for steam turbine shaft seal according to claim 1, characterized in that: The water outlet end of the delivery pipe (31) is fixedly connected to a second pump body (33), the water outlet end of the second pump body (33) is fixedly connected to a circulation pipe (34), and the circulation pipe (34) is fixedly connected to the cache box (30).
5. The dedicated temperature and pressure reduction device for steam turbine shaft seal according to claim 4, characterized in that: A support seat (35) is fixedly provided on the bottom surface of the second pump body (33), and the bottom surface of the support seat (35) is fixedly connected to the top surface of the base (1).
6. A steam turbine shaft seal dedicated temperature and pressure reduction device according to claim 5, characterized in that: One side of the cache box (30) is fixedly connected to an input pipe (36) and a drainage pipe (37), and both the input pipe (36) and the drainage pipe (37) are fixedly connected to an external water source.