Tool for cylinder collision test of large steam turbine

Abstract

The utility model discloses a tool for a large steam turbine cylinder collision test, which comprises an upper shell and a lower shell, a closed monitoring cavity is formed between the upper shell and the lower shell, a monitoring assembly is arranged on the inner side of the upper shell and the inner side of the lower shell, the monitoring assembly is used for monitoring collision force in real time, and a fixing assembly is inserted between the upper shell and the lower shell. The utility model belongs to the technical field of test tools, and particularly relates to a device for monitoring the collision force of the end part of a rotor in real time through the linkage arrangement of a pressure-bearing plate, a pressure-sensitive sensor and a spring in a monitoring assembly, and carrying out temperature field synchronous analysis on the end part of the rotor through a heat-sensitive sensor. Therefore, the tool for the cylinder collision test of the large steam turbine can monitor the force-heat state of the rotor.

Description

Technical Field

[0001] This utility model belongs to the field of testing tool technology, and in particular relates to a tool for testing the cylinder impact of a large steam turbine. Background Technology

[0002] Steam turbines are critical equipment in power plants and large ship propulsion systems. The clearance between the rotor and cylinder must be strictly controlled, typically within the range of 0.01 mm, to ensure efficient rotor rotation driven by steam and prevent friction damage to moving and stationary components. During turbine maintenance, slight deformation may occur in the low-pressure cylinder, causing changes in the clearance between the rotor and cylinder components. Cylinder impact tests accurately diagnose the minimum clearance between the two, providing crucial data for subsequent shaft alignment and other maintenance work. These tests can promptly identify potential collision hazards between the rotor and cylinder, preventing rubbing failures caused by insufficient clearance during operation. Such failures subject the rotor and stator to impact and tangential friction, potentially leading to increased vibration, instability, and even equipment damage.

[0003] Traditional cylinder collision testing is time-consuming and labor-intensive, requiring multiple personnel and a considerable amount of time to complete, and it also poses safety risks. Furthermore, traditional methods are limited by on-site conditions and cannot meet the precision and efficiency requirements of modern large steam turbine maintenance. Summary of the Invention

[0004] In response to the above situation, in order to overcome the shortcomings of existing technologies that are limited by on-site conditions.

[0005] The technical solution adopted by this utility model is as follows: a tool for testing the cylinder collision of a large steam turbine, including an upper shell and a lower shell, a closed monitoring cavity is formed between the upper shell and the lower shell, a monitoring component is provided on the inner side of the upper shell and the lower shell, the monitoring component is used to realize real-time monitoring of the collision force, and a fixing component is inserted between the upper shell and the lower shell.

[0006] Furthermore, the monitoring component includes a pressure plate and a pressure sensor. A closed monitoring cavity is formed between the upper shell and the lower shell. A first sliding groove is provided on the inner side of the upper shell, and a second sliding groove is provided on the inner side of the lower shell. The pressure plate is slidably disposed inside the first and second sliding grooves, respectively. The pressure sensor is fixedly connected to the inner side of the first and second sliding grooves, respectively. A spring is provided between the pressure plate and the pressure sensor. A first locking groove is provided on the inner side of the upper shell, and a second locking groove that matches the first locking groove is provided on the inner side of the lower shell. Magnetic seats are fixedly connected to the inner sides of the first and second locking grooves, and a thermal sensor is fixedly connected to the center of the magnetic seats.

[0007] Furthermore, the fixing assembly includes a double-ended bolt, a fixing nut, and a spring plate. A fixing plate one is symmetrically fixed to the outer side of the upper shell along the central axis of the upper shell, and a fixing plate two is symmetrically fixed to the outer side of the lower shell along the central axis of the lower shell. A fixing hole one is opened on the fixing plate one, and a fixing hole two is opened on the fixing plate two. The double-ended bolt is inserted into the fixing hole one and the fixing hole two. The fixing nut is threaded to both ends of the double-ended bolt, and the spring plate is sleeved on the double-ended bolt.

[0008] Furthermore, the springs are respectively disposed inside slide groove one and slide groove two, one end of the spring is fixedly connected to the pressure sensor, and the other end of the spring is fixedly connected to the pressure plate.

[0009] Furthermore, the spring plates are provided in several groups and are stacked on top of each other. One end of the spring plate is in contact with the fixing nut, and the other end of the spring plate is in contact with fixing plate one and fixing plate two respectively.

[0010] Furthermore, a microprocessor is provided on the outer side of the upper and lower shells, the pressure sensor is electrically connected to the microprocessor via a wire, and the thermal sensor is electrically connected to the microprocessor via a wire.

[0011] Furthermore, the pressure plate is arc-shaped, and the outer side of the pressure plate is adapted to the inner side of slide groove one and slide groove two, respectively.

[0012] Furthermore, the magnetic base is made of neodymium iron boron material.

[0013] The beneficial effects of this utility model after adopting the above structure are as follows:

[0014] (1) By linking the pressure plate and pressure sensor with the spring in the monitoring component, the collision force at the rotor end is monitored in real time, and the temperature field at the rotor end is analyzed synchronously by the thermal sensor, thereby realizing the monitoring of the force-thermal state of the rotor.

[0015] (2) By linking the double-headed bolt, fixing nut and several spring plates with the neodymium iron boron magnet in the fixing assembly, the tool can be quickly positioned in conjunction with visual guidance, and the test tool can be stably fixed. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is an exploded view of the overall structure of this utility model;

[0019] Figure 3 This is a half-section diagram of the overall structure of this utility model. Figure 1 ;

[0020] Figure 4 This is a half-section diagram of the overall structure of this utility model. Figure 2 ;

[0021] Figure 5 for Figure 3 Enlarged view of part A.

[0022] In the attached diagram: 1. Upper shell, 2. Lower shell, 3. Slide groove one, 4. Slide groove two, 5. Pressure plate, 6. Pressure sensor, 7. Spring, 8. Slot one, 9. Slot two, 10. Magnetic base, 11. Thermistor, 12. Double-ended bolt, 13. Fixing nut, 14. Spring plate, 15. Fixing plate one, 16. Fixing plate two, 17. Fixing hole one, 18. Fixing hole two. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] like Figure 1 As shown, a tool for testing the cylinder impact of a large steam turbine includes an upper shell 1 and a lower shell 2. A closed monitoring chamber is formed between the upper shell 1 and the lower shell 2. Monitoring components are provided inside the upper shell 1 and the lower shell 2. The monitoring components are used to realize real-time monitoring of the impact force. A fixing component is inserted between the upper shell 1 and the lower shell 2.

[0026] like Figure 2-3As shown in Figure -5, the monitoring component includes a pressure plate 5 and a pressure sensor 6. A closed monitoring cavity is formed between the upper shell 1 and the lower shell 2. A sliding groove 3 is provided on the inner side of the upper shell 1, and a sliding groove 4 is provided on the inner side of the lower shell 2. The pressure plate 5 is slidably disposed inside the sliding groove 3 and the sliding groove 4, respectively. The pressure sensor 6 is fixedly connected to the inner side of the sliding groove 3 and the sliding groove 4, respectively. A spring 7 is provided between the pressure plate 5 and the pressure sensor 6. A slot 8 is provided on the inner side of the upper shell 1, and a slot 9 that matches the slot 8 is provided on the inner side of the lower shell 2. A magnetic base 10 is fixedly connected to the inner side of the slot 8 and the slot 9, and a thermal sensor 11 is fixedly connected to the middle of the magnetic base 10.

[0027] The pressure plate 5 is arc-shaped, with its outer side fitting into the inner sides of slide groove 3 and slide groove 4 respectively. Springs 7 are respectively installed inside slide groove 3 and slide groove 4. One end of spring 7 is fixedly connected to pressure sensor 6, and the other end of spring 7 is fixedly connected to pressure plate 5. Microprocessors are installed on the outer sides of upper shell 1 and lower shell 2. Pressure sensor 6 is electrically connected to microprocessor via wires. Thermistor 11 is electrically connected to microprocessor via wires. Magnetic base 10 is made of neodymium iron boron material and holds the end of the rotating shaft in the monitoring cavity. The distributed neodymium iron boron magnetic base 10, in conjunction with visual guidance, enables rapid tool positioning. When the rotor rotates, the rotor end presses against pressure plate 5, causing spring 7 to undergo elastic deformation. Pressure sensor 6 monitors the elastic pressure, providing soft contact collision protection to avoid equipment damage. This enables real-time monitoring of the collision force at the rotor end and monitoring of the temperature field at the rotor end via thermistor 11, thereby achieving force-thermal monitoring of the rotor.

[0028] like Figure 2-4 As shown, the fixing assembly includes a double-ended bolt 12, a fixing nut 13, and a spring plate 14. A fixing plate 15 is symmetrically fixed to the outer side of the upper shell 1 along the central axis of the upper shell 1, and a fixing plate 26 is symmetrically fixed to the outer side of the lower shell 2 along the central axis of the lower shell 2. The fixing plate 15 has a fixing hole 17, and the fixing plate 26 has a fixing hole 28. The double-ended bolt 12 is inserted into the fixing hole 17 and the fixing hole 28. The fixing nut 13 is threaded to both ends of the double-ended bolt 12, and the spring plate 14 is sleeved on the double-ended bolt 12.

[0029] The spring plates 14 are arranged in several groups and are stacked on top of each other. One end of the spring plate 14 contacts the fixing nut 13, and the other end of the spring plate 14 contacts the fixing plate 15 and the fixing plate 2 respectively. The stacking of the spring plates 14 ensures the tight connection between the upper shell 1 and the lower shell 2 and ensures the tightness of the monitoring cavity.

[0030] In practical use, the tool is placed at the end of the rotor and fixedly connected to the outside of the cylinder. The cylinder is slowly lifted by the hydraulic device, and the rotor is manually rotated until it can no longer be rotated. The force-thermal state of the rotor is recorded by the monitoring component.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents. In conclusion, if those skilled in the art, inspired by this description, design similar structural methods and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A tool for testing the cylinder impact of a large steam turbine, characterized in that: It includes an upper shell (1) and a lower shell (2), a closed monitoring cavity is formed between the upper shell (1) and the lower shell (2), a monitoring component is provided on the inner side of the upper shell (1) and the lower shell (2), the monitoring component is used to realize real-time monitoring of collision force, and a fixing component is inserted between the upper shell (1) and the lower shell (2); The monitoring component includes a pressure plate (5) and a pressure sensor (6). A closed monitoring cavity is formed between the upper shell (1) and the lower shell (2). A sliding groove (3) is provided on the inner side of the upper shell (1), and a sliding groove (4) is provided on the inner side of the lower shell (2). The pressure plate (5) is slidably disposed inside the sliding groove (3) and the sliding groove (4). The pressure sensor (6) is fixedly connected to the inner side of the sliding groove (3) and the sliding groove (4). A spring (7) is provided between the pressure plate (5) and the pressure sensor (6). A slot (8) is provided on the inner side of the upper shell (1), and a slot (9) that matches the slot (8) is provided on the inner side of the lower shell (2). A magnetic base (10) is fixedly connected to the inner side of the slot (8) and the slot (9). A thermal sensor (11) is fixedly connected to the middle of the magnetic base (10).

2. The tool for testing the cylinder impact of a large steam turbine according to claim 1, characterized in that: The fixing assembly includes a double-ended bolt (12), a fixing nut (13), and a spring plate (14). A fixing plate one (15) is symmetrically fixed to the outer side of the upper shell (1) along the central axis of the upper shell (1). A fixing plate two (16) is symmetrically fixed to the outer side of the lower shell (2) along the central axis of the lower shell (2). A fixing hole one (17) is opened on the fixing plate one (15), and a fixing hole two (18) is opened on the fixing plate two (16). The double-ended bolt (12) is inserted into the fixing hole one (17) and the fixing hole two (18). The fixing nut (13) is threaded to both ends of the double-ended bolt (12). The spring plate (14) is sleeved on the double-ended bolt (12).

3. The tool for testing the cylinder impact of a large steam turbine according to claim 2, characterized in that: The springs (7) are respectively installed inside the first slide (3) and the second slide (4). One end of the spring (7) is fixedly connected to the pressure sensor (6), and the other end of the spring (7) is fixedly connected to the pressure plate (5).

4. The tool for testing the cylinder impact of a large steam turbine according to claim 3, characterized in that: The spring plates (14) are arranged in several groups and are stacked on top of each other. One end of the spring plate (14) is in contact with the fixing nut (13), and the other end of the spring plate (14) is in contact with fixing plate one (15) and fixing plate two (16) respectively.

5. The tool for testing the cylinder impact of a large steam turbine according to claim 4, characterized in that: The upper shell (1) and the lower shell (2) are equipped with microprocessors on their outer sides. The pressure sensor (6) is electrically connected to the microprocessor through a wire, and the thermal sensor (11) is electrically connected to the microprocessor through a wire.

6. The tool for testing the cylinder impact of a large steam turbine according to claim 5, characterized in that: The pressure plate (5) is arc-shaped, and the outer side of the pressure plate (5) is matched with the inner side of the first slide (3) and the second slide (4).

7. The tool for testing the cylinder impact of a large steam turbine according to claim 6, characterized in that: The magnetic base (10) is made of neodymium iron boron material.

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