Oil seepage prevention device for vibration temperature component of steam turbine of thermal power plant

Abstract

The invention discloses a thermal power plant steam turbine vibration temperature component oil seepage prevention device which comprises a steam turbine main engine, and the side end of the steam turbine main engine is fixedly connected with a first rectangular mounting frame; the side end of the fixed frame is fixedly connected with a second rectangular mounting frame, the second rectangular mounting frame is fixedly connected with the first rectangular mounting frame through a first bolt and a nut, the side end of the fixed frame is provided with a rectangular strip-shaped through hole, the rectangular strip-shaped through hole is provided with a sealing ring, and a vibration sensor and a temperature sensor are fixedly connected in the fixed frame. The vibration sensor and the temperature sensor are connected with the steam turbine main engine; a lifting type oil seepage prevention mechanism is composed of a fixing frame, a rectangular strip-shaped through hole, a sealing ring, a vibration sensor, a temperature sensor, an L-shaped fixing plate, a lifting guide rail, a reversible motor, a vertical screw rod, a lifting sliding block and an oil baffle plate, the oil baffle plate can be temporarily opened when temperature is detected, and the oil baffle plate can be closed after detection is completed so as to prevent oil seepage for a long time; and the accuracy of temperature detection is not influenced.

Description

Technical Field

[0001] This invention relates to the field of oil leakage prevention technology, and in particular to an oil leakage prevention device for vibration and temperature components of steam turbines in thermal power plants. Background Technology

[0002] Existing oil-leakage prevention devices for vibration and temperature components in thermal power plant steam turbines have oil-leakage components that can easily affect the temperature distribution within the internal space, leading to inaccurate temperature detection. Furthermore, the installation structure of these devices is complex, difficult to disassemble and assemble, and inconvenient for maintenance. A Chinese patent, application number CN202210273415.0, discloses an "Oil-Leakage Prevention Device for Vibration and Temperature Components in Thermal Power Plant Steam Turbines." This device improves the sealing effect at the contact point between the cable and the cylinder body through a sealing component. Compared to sealant, this method offers better stability and is more convenient for maintenance and replacement. The connecting components further enhance the efficiency of disassembly and assembly at the sealing points, facilitating maintenance by personnel. However, the oil-leakage prevention of this device can still affect temperature detection, hindering accurate measurement. Summary of the Invention

[0003] In view of the problems existing in the prior art, the present invention is proposed.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an oil leakage prevention device for vibration and temperature components of a steam turbine in a thermal power plant, comprising, The steam turbine main unit; a first rectangular mounting frame installed on the side of the steam turbine main unit for docking and fixing, and providing an assembly reference; and... The fixed frame has a second rectangular mounting frame on its side, which is detachably connected to the first rectangular mounting frame by a first bolt and nut. The fixed frame has a rectangular strip-shaped through hole with a sealing ring on its side, which is used to seal the gap between the oil baffle and the through hole. The fixed frame is equipped with a vibration sensor and a temperature sensor, both of which are connected to the turbine main unit and are used to collect vibration and temperature data of the turbine main unit, respectively. An L-shaped fixing plate is detachably connected to the side of the fixing frame via a second bolt. Symmetrically distributed lifting guide rails are provided at its front end. A reversible motor is built into the upper end of the lifting guide rail. The output end of the reversible motor is connected to a vertical screw. The vertical screw is threadedly connected to a lifting slider. An oil baffle is provided at the front end of the lifting slider. The oil baffle can penetrate into the fixing frame to achieve the sealing of the fixing frame to prevent oil leakage or to conduct temperature detection.

[0005] As a preferred embodiment of the anti-oil leakage device for the vibration and temperature components of a thermal power plant steam turbine according to the present invention, wherein: a mounting plate is fixed at the end of the main steam turbine away from the first rectangular mounting frame, and threaded mounting holes are provided at the four corners of the mounting plate; the mounting plate cooperates with the threaded mounting holes to fix the main steam turbine to prevent its displacement from affecting the detection accuracy.

[0006] As a preferred embodiment of the oil leakage prevention device for the vibration and temperature components of a thermal power plant turbine according to the present invention, the second rectangular mounting frame abuts against the first rectangular mounting frame, and a sealing gasket can be selectively provided on the contact surface of the two; the surface contact structure ensures connection stability, and the optional sealing gasket is used to enhance the sealing performance of the contact surface.

[0007] As a preferred embodiment of the oil leakage prevention device for the vibration and temperature components of a thermal power plant turbine according to the present invention, the first bolt and nut are respectively located at the four corners of the first rectangular mounting frame and the second rectangular mounting frame, and their threads are compatible; the four-corner distribution structure realizes the uniform force connection of the mounting frame and avoids local stress concentration leading to loosening.

[0008] As a preferred embodiment of the anti-oil leakage device for vibration and temperature components of a thermal power plant turbine according to the present invention, wherein: the end of the fixed frame away from the main turbine is detachably connected to the encapsulation plate by a third bolt, and the encapsulation plate abuts against the vibration sensor and the temperature sensor; the encapsulation plate is used to protect the sensor from dust and oil mist corrosion, and facilitates sensor maintenance and replacement.

[0009] As a preferred embodiment of the anti-oil leakage device for the vibration and temperature components of a thermal power plant turbine according to the present invention, wherein: side grooves are provided at both ends of the rectangular strip-shaped through hole, and the extension direction of the side grooves is consistent with the length of the through hole; the side grooves are used to guide the oil baffle plate to rise and fall to prevent displacement, and to assist the sealing ring to enhance the closure and sealing performance.

[0010] As a preferred embodiment of the anti-oil leakage device for the vibration and temperature components of a thermal power plant steam turbine described in this invention, the lower end of the lifting guide rail abuts against the fixed frame, and vertical grooves are provided on its left and right inner walls. The length of the vertical grooves is adapted to the lifting stroke of the oil baffle plate. The vertical grooves are used to limit the lifting slider to ensure that the lifting of the oil baffle plate is stable and accurate.

[0011] As a preferred embodiment of the oil leakage prevention device for the vibration and temperature components of a thermal power plant steam turbine according to the present invention, wherein: vertical sliding rods are fixed at both ends of the lifting slider, and the vertical sliding rods are slidably adapted to the vertical sliding groove; the vertical sliding rods are used to limit the rotation of the lifting slider and prevent it from shaking so as to ensure the reliable operation of the oil baffle.

[0012] As a preferred embodiment of the oil leakage prevention device for the vibration and temperature components of a thermal power plant turbine according to the present invention, the oil baffle plate tightly abuts against the sealing ring, and the sealing ring is made of an oil-resistant elastic material; the oil-resistant material can resist oil erosion and maintain a sealed state for a long time to ensure the durability of oil leakage prevention.

[0013] As a preferred embodiment of the oil leakage prevention device for the vibration and temperature components of a thermal power plant steam turbine according to the present invention, the oil baffle plate is snapped into the side groove, and the thickness of the oil baffle plate matches the width of the side groove; the snapping structure restricts the lateral displacement of the oil baffle plate, and forms a double seal with the sealing ring to improve the oil leakage prevention performance.

[0014] The beneficial effects of this invention are as follows: The device consists of a fixed frame, a rectangular strip-shaped through hole, a sealing ring, a vibration sensor, a temperature sensor, an L-shaped fixing plate, a lifting guide rail, a reversible motor, a vertical screw, a lifting slider, and an oil baffle plate, forming a lifting anti-oil leakage mechanism. When detecting temperature, the oil baffle plate can be temporarily opened, and after detection, it can be closed to prevent oil leakage over a long period of time without affecting the accuracy of temperature detection. The device is assembled using a turbine main unit, a rectangular mounting frame, a fixed frame, a sealing plate, an L-shaped fixing plate, bolts, and nuts, resulting in a stable and robust structure that is easy to assemble and disassemble, facilitating maintenance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the front structure of an oil leakage prevention device for vibration and temperature components of a steam turbine in a thermal power plant according to the present invention. Figure 2 This is a schematic diagram of the rear structure of an oil leakage prevention device for vibration and temperature components of a steam turbine in a thermal power plant according to the present invention. Figure 3 This is a top view schematic diagram of an oil leakage prevention device for vibration and temperature components of a steam turbine in a thermal power plant, according to the present invention. Figure 4 This is a longitudinal three-dimensional cross-sectional structural diagram of an oil leakage prevention device for vibration and temperature components of a steam turbine in a thermal power plant, according to the present invention. Figure 5 This is a schematic diagram of the transverse three-dimensional cross-sectional structure of an oil leakage prevention device for vibration and temperature components of a steam turbine in a thermal power plant, according to the present invention.

[0016] Legend: 1. Steam turbine main unit; 2. Threaded mounting hole; 3. Mounting plate; 4. Oil baffle plate; 5. Lifting slider; 6. Vertical slide bar; 7. Vertical slide groove; 8. Vertical screw; 9. Reversible motor; 10. Lifting guide rail; 11. L-shaped fixing plate; 12. Second bolt; 13. Encapsulation plate; 14. Fixing frame; 15. Second rectangular mounting frame; 16. First rectangular mounting frame; 17. Nut; 18. First bolt; 19. Third bolt; 20. Sealing ring; 21. Rectangular strip through hole; 22. Temperature sensor; 23. Vibration sensor; 24. Side groove. Detailed Implementation

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0019] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0020] Reference Figure 1 , Figure 2 and Figure 3 According to an embodiment of the present invention, a device for preventing oil leakage of vibration temperature components of a steam turbine in a thermal power plant is provided, which includes a steam turbine main unit 1. A first rectangular mounting frame 16 is fixedly connected to the side end of the steam turbine main unit 1. A mounting plate 3 is fixedly connected to the end of the steam turbine main unit 1 away from the first rectangular mounting frame 16. Threaded mounting holes 2 are provided in the mounting plate 3, and the threaded mounting holes 2 are located at the four corners of the mounting plate 3. Reference Figure 1 , Figure 4 and Figure 5A fixed frame 14 is provided, and a second rectangular mounting frame 15 is fixedly connected to the side end of the fixed frame 14. The second rectangular mounting frame 15 abuts against the first rectangular mounting frame 16. The second rectangular mounting frame 15 is fixedly connected to the first rectangular mounting frame 16 by a first bolt 18 and a nut 17. The first bolt 18 and the nut 17 are located at the four corners of the first rectangular mounting frame 16 and the second rectangular mounting frame 15. The first bolt 18 and the nut 17 are threaded together. A rectangular strip-shaped through hole 21 is provided on the side end of the fixed frame 14. A sealing ring 20 is provided in the rectangular strip-shaped through hole 21. Side grooves 24 are provided at the left and right ends of the rectangular strip-shaped through hole 21. A vibration sensor 23 and a temperature sensor 22 are fixedly connected inside the fixed frame 14. The vibration sensor 23 and the temperature sensor 22 are connected to the turbine main unit 1. An encapsulation plate 13 is fixedly connected to the end of the fixed frame 14 away from the turbine main unit 1 by a third bolt 19. The encapsulation plate 13 abuts against the vibration sensor 23 and the temperature sensor 22. The third bolt 19 is located at the four corners of the encapsulation plate 13. Specifically, during vibration testing of the anti-oil leakage device for vibration and temperature components in a thermal power plant turbine, the oil baffle 4 is in a closed state. The vibration sensor 23 inside the fixed frame 14 detects the vibration status data of the turbine main unit 1. The sealing rings 20 at both ends of the oil baffle 4 are tightly fitted with the oil baffle 4 and the rectangular strip through hole 21 to enhance the sealing performance of the oil baffle 4. The turbine main unit 1 can be fixed to the fixed frame 14 by the first rectangular mounting frame 16, the second rectangular mounting frame 15, the first bolt 18, and the nut 17. The vibration sensor 23 and the temperature sensor 22 can be stably encapsulated in the fixed frame 14 by the encapsulation plate 13. Similarly, the device can be quickly disassembled.

[0021] Reference Figure 1 and Figure 4 Figure 11 shows an L-shaped fixing plate 11, which is fixedly connected to the side of the fixing frame 14 by a second bolt 12. A lifting guide rail 10 is fixedly connected to the front end of the L-shaped fixing plate 11. The lower end of the lifting guide rail 10 abuts against the fixing frame 14. Vertical sliding grooves 7 are provided on the inner walls of both sides of the lifting guide rail 10. The lifting guide rail 10 is symmetrically distributed at the left and right ends of the L-shaped fixing plate 11. A reversible motor 9 is fixedly connected inside the lifting guide rail 10. The reversible motor 9 is located at the upper end of the lifting guide rail 10. A vertical screw 8 is fixedly connected to the output end of the reversible motor 9. A lifting slider 5 is threadedly connected to the vertical screw 8. Vertical sliding rods 6 are fixedly connected to both ends of the lifting slider 5. The lifting slider 5 is slidably connected to the vertical sliding grooves 7 through the vertical sliding rods 6. An oil baffle 4 is fixedly connected to the front end of the lifting slider 5. The oil baffle 4 penetrates into the interior of the fixing frame 14. The oil baffle 4 abuts against the sealing ring 20 and is engaged with the side groove 24. Specifically, when performing temperature detection on the anti-oil leakage device for vibration temperature components in a thermal power plant turbine, in order to ensure uniform internal temperature distribution, the oil baffle 4 can be opened. First, the reversible motor 9 is started, which drives the vertical screw 8 to rotate in the forward direction. The forward-rotating vertical screw 8 drives the lifting slider 5 to move upward, and the upward-moving lifting slider 5 drives the oil baffle 4 to move upward, thus releasing the oil baffle 4 from the closed state of the fixed frame 14. When the temperature sensor 22 detects the real-time internal temperature, the reversible motor 9 drives the vertical screw 8 to rotate in the reverse direction, which drives the oil baffle 4 to move downward, thus sealing the fixed frame 14 to prevent oil leakage. The lifting guide rail 10 can be installed on the side of the fixed frame 14 through the L-shaped fixing plate 11 and the second bolt 12. Similarly, the lifting guide rail 10 can be quickly disassembled. The driving method of the oil baffle 4 is not limited to a screw lifting structure; it can also be replaced by pneumatic, hydraulic, or linear motor drive to adapt to different response speeds and sealing requirements under different working conditions. To further prevent oil from flowing back into the turbine main unit 1 after temperature measurement, an oil collection trough and oil return channel can be set below the oil baffle 4. The leaked oil can be guided back to the oil return system by gravity or a micro pump to avoid oil accumulation affecting the sensor accuracy. In terms of sealing, in addition to using a sealing ring 20 and a side groove 24, a double-layer sealing structure or a high-temperature and oil-resistant elastic material can be added. A beveled or stepped sealing surface can be designed on the edge of the oil baffle 4 to enhance the sealing effect when closed. In addition, a position sensor and a temperature feedback mechanism can be integrated into the control system to realize intelligent opening and closing of the oil baffle 4 and monitoring of the sealing status, further improving the automation level and reliability of the device.

[0022] Working principle: The oil leakage prevention device of the vibration and temperature components of the steam turbine in the thermal power plant is used to prevent oil leakage during vibration and temperature detection. During vibration detection, the vibration sensor 23 in the fixed frame 14 can directly detect the vibration status data of the steam turbine main unit 1. During temperature detection, the oil baffle 4 needs to be opened to release the closed state of the oil baffle 4 on the fixed frame 14. The lifting guide rail 10 will drive the oil baffle 4 to move upward, so that the fixed frame 14 is connected to the steam turbine main unit 1. The temperature sensor 22 will detect the real-time temperature data inside. After the temperature detection is completed, the lifting guide rail 10 will drive the oil baffle 4 to move downward to close the fixed frame 14, so that the oil baffle 4 seals the fixed frame 14 to prevent oil leakage.

[0023] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A device for preventing oil leakage from vibration and temperature components of a steam turbine in a thermal power plant, characterized in that: include, A steam turbine main unit (1), a first rectangular mounting frame (16) installed on the side of the steam turbine main unit (1) for docking and fixing (14) and providing assembly reference; and, A fixed frame (14) has a second rectangular mounting frame (15) on its side. The second rectangular mounting frame (15) is detachably connected to the first rectangular mounting frame (16) by a first bolt (18) and a nut (17). A rectangular strip-shaped through hole (21) with a sealing ring (20) is opened on the side of the fixed frame (14). The sealing ring (20) is used to seal the gap between the oil baffle (4) and the through hole. A vibration sensor (23) and a temperature sensor (22) are installed inside the fixed frame (14). Both are connected to the turbine main unit (1) and are used to collect vibration and temperature data of the turbine main unit (1), respectively. L-shaped fixing plate (11), the L-shaped fixing plate (11) is detachably connected to the side of the fixing frame (14) by the second bolt (12), and the front end of the fixing plate (11) is provided with symmetrically distributed lifting guide rails (10); the upper end of the lifting guide rail (10) is built with a reversible motor (9), the output end of the reversible motor (9) is connected to a vertical screw (8), the vertical screw (8) is threadedly connected to the lifting slider (5), and the front end of the lifting slider (5) is provided with an oil baffle plate (4); the oil baffle plate (4) can penetrate into the fixing frame (14) to realize the sealing of the fixing frame (14) to prevent oil leakage or to conduct temperature detection.

2. The oil leakage prevention device for vibration and temperature components of a thermal power plant steam turbine as described in claim 1, characterized in that: The turbine main unit (1) is fixed with a mounting plate (3) at one end away from the first rectangular mounting frame (16). The mounting plate (3) has threaded mounting holes (2) at its four corners. The mounting plate (3) cooperates with the threaded mounting holes (2) to fix the turbine main unit (1) to prevent its displacement from affecting the detection accuracy.

3. The oil leakage prevention device for vibration and temperature components of a thermal power plant turbine as described in claim 2, characterized in that: The second rectangular mounting frame (15) abuts against the first rectangular mounting frame (16), and a sealing gasket can be selectively provided on the contact surface of the two; the surface contact structure ensures connection stability, and the optional sealing gasket is used to enhance the sealing of the contact surface.

4. The oil leakage prevention device for vibration and temperature components of a thermal power plant steam turbine as described in claim 3, characterized in that: The first bolt (18) and nut (17) are respectively located at the four corners of the first rectangular mounting frame (16) and the second rectangular mounting frame (15), and the threads of the two are compatible; the four-corner distribution structure realizes the uniform force connection of the mounting frame and avoids local stress concentration leading to loosening.

5. The oil leakage prevention device for vibration and temperature components of a thermal power plant steam turbine as described in claim 4, characterized in that: The end of the fixed frame (14) away from the turbine main unit (1) is detachably connected to the encapsulation plate (13) by the third bolt (19). The encapsulation plate (13) abuts against the vibration sensor (23) and the temperature sensor (22). The encapsulation plate (13) is used to protect the sensor from dust and oil mist corrosion and facilitates sensor maintenance and replacement.

6. The oil leakage prevention device for vibration and temperature components of a thermal power plant turbine as described in claim 5, characterized in that: The rectangular strip-shaped through hole (21) has side grooves (24) at both ends. The side grooves (24) extend in the same direction as the length of the through hole. The side grooves (24) are used to guide the oil baffle (4) to rise and fall to prevent displacement, and to assist the sealing ring (20) in enhancing the closure and sealing performance.

7. The oil leakage prevention device for vibration and temperature components of a thermal power plant steam turbine as described in claim 6, characterized in that: The lower end of the lifting guide rail (10) abuts against the fixed frame (14), and vertical grooves (7) are provided on its left and right inner walls. The length of the vertical grooves (7) is adapted to the lifting stroke of the oil baffle (4). The vertical grooves (7) are used to limit the lifting slider (5) to ensure that the oil baffle (4) lifts and lowers smoothly and accurately.

8. The oil leakage prevention device for vibration and temperature components of a thermal power plant steam turbine as described in claim 7, characterized in that: The lifting slider (5) has vertical slide rods (6) fixed at both ends. The vertical slide rods (6) slide and adapt to the vertical slide groove (7). The vertical slide rods (6) are used to limit the rotation of the lifting slider (5) and prevent it from shaking so as to ensure the reliable operation of the oil baffle (4).

9. The oil leakage prevention device for vibration and temperature components of a thermal power plant steam turbine as described in claim 8, characterized in that: The oil baffle (4) tightly abuts against the sealing ring (20), which is made of oil-resistant elastic material. The oil-resistant material can resist oil erosion and maintain a sealed state for a long time to ensure the durability of oil leakage prevention.

10. The oil leakage prevention device for vibration and temperature components of a thermal power plant steam turbine as described in claim 9, characterized in that: The oil baffle (4) is snapped into the side groove (24), and the thickness of the oil baffle (4) matches the width of the side groove (24); the snapping structure restricts the lateral displacement of the oil baffle (4), and forms a double seal with the sealing ring (20) to improve the oil leakage prevention performance.

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