A sliding pin gap detection mechanism for a turbine inner bearing seat

Abstract

The application provides a sliding pin gap detection mechanism for a steam turbine inner bearing seat, which comprises a bearing seat and a high-pressure cylinder shell connected to one side of the bearing seat, wherein a vertical pin is arranged on the side surface of the bearing seat close to the high-pressure cylinder shell, a pin slot is arranged on the side of the high-pressure cylinder shell close to the bearing seat for the vertical pin to pass through, and a detection device is arranged in the slot body of the pin slot; the detection device comprises a mounting slot arranged at the end of the pin slot away from the bearing seat, and a pressure-resistant shell arranged in the slot body of the mounting slot; an infrared distance measuring sensor is arranged on the shell body of the pressure-resistant shell, and a stabilizing assembly is arranged on both sides of the infrared distance measuring sensor in the pressure-resistant shell. When the high-pressure cylinder shell expands, the infrared distance measuring sensor is clamped, the relative shaking of the infrared distance measuring sensor is reduced, and the infrared distance measuring sensor is stably detected.

Description

Technical Field

[0001] This invention relates primarily to the technical field of steam turbines, and more specifically to a mechanism for detecting the gap of sliding pins in the bearing housing inside a steam turbine. Background Technology

[0002] During the operation of a steam turbine, the temperature of the cylinder changes greatly, resulting in a large thermal expansion value. Therefore, a series of guide pins are installed between the inner and outer cylinders, between the cylinder and the bearing housing, and between the bearing housing and the base plate to form the steam turbine's sliding pin system.

[0003] According to patent application CN202120505367.4, a maintenance structure for a turbine bearing housing sliding pin system includes a base plate and a base frame. The base plate and base frame are provided with mating keyways and guide keys. The base plate has a through groove and a recessed groove located above the guide keys. The through groove penetrates the upper and lower surfaces of the base plate, exposing the guide keys within it. A cover plate is installed in the recessed groove to cover the through groove. This maintenance structure for a turbine bearing housing sliding pin system facilitates the maintenance of the guide keys.

[0004] The aforementioned bearing housing sliding pin system maintenance structure allows for convenient observation and maintenance of the guide key's working status when maintenance is required. However, traditional bearing housing sliding pin system maintenance structures are affected by the expansion of turbine parts, making it difficult to perform stable testing and thus affecting the testing results. Summary of the Invention

[0005] This invention mainly provides a mechanism for detecting the gap of sliding pins in the bearing housing inside a steam turbine, in order to solve the technical problems mentioned in the background art.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0007] A mechanism for detecting the gap of sliding pins in the bearing housing inside a steam turbine includes a bearing housing and a high-pressure cylinder housing connected to one side of the bearing housing. The bearing housing is characterized in that a vertical pin is provided on the surface of the bearing housing near the high-pressure cylinder housing, and a pin groove is provided on the side of the high-pressure cylinder housing near the bearing housing for the vertical pin to pass through. A detection device is provided in the groove of the pin groove.

[0008] The detection device includes a mounting groove located at the end of the pin groove away from the bearing seat, and a pressure-resistant shell located inside the mounting groove. An infrared ranging sensor is mounted on the shell of the pressure-resistant shell, and stabilizing components are located on both sides of the infrared ranging sensor inside the pressure-resistant shell.

[0009] The stabilizing component includes a first piston cylinder that passes through the housing of the pressure-resistant shell, a clamping component connected to the outlet end of the first piston cylinder, and an actuating end of the clamping component connected to the infrared ranging sensor.

[0010] Furthermore, the clamping component includes a plurality of second piston cylinders passing through the pressure-resistant shell. The air inlet end of the second piston cylinder is connected to the air outlet end of the first piston cylinder, and the piston rod of the second piston cylinder abuts against the infrared ranging sensor. In this invention, when the high-pressure cylinder shell expands, it clamps the infrared ranging sensor, reducing the relative sway of the infrared ranging sensor and enabling the infrared ranging sensor to perform stable detection.

[0011] Furthermore, the outer surface of the first piston cylinder is provided with multiple air outlets, and the air outlets are connected to the air inlets through air supply pipes. The air inlets are installed on the lower surface of the second piston cylinder. In this invention, the air inside the first piston cylinder is discharged through the air outlets, and the gas enters the second piston cylinder through the air supply pipes and the air inlets, thereby supplying gas to the second piston cylinder.

[0012] Furthermore, a clamping ring is installed on the outer surface of the piston rod of the second piston cylinder near the infrared ranging sensor. A first spring abuts against the infrared ranging sensor. The first spring is sleeved on the outside of the piston rod of the second piston cylinder. In this invention, when the piston rod of the second piston cylinder is not extended, the extension and retraction of the first spring provides a buffer for the infrared ranging sensor.

[0013] Furthermore, two clamping blocks are installed on the outer surface of the infrared ranging sensor for the piston rod of the second piston cylinder to abut against. The two clamping blocks are symmetrically arranged with the infrared ranging sensor as the central axis. In this invention, the infrared ranging sensor increases the area between itself and the piston rod of the second piston cylinder through the clamping blocks, thereby increasing the contact area.

[0014] Furthermore, the pressure-resistant shell is connected to the infrared ranging sensor via a shock-absorbing assembly. The shock-absorbing assembly includes a support ring passing through both ends of the pressure-resistant shell and a mounting ring fitted onto both ends of the infrared ranging sensor. The inner ring surface of the support ring is connected to the outer ring surface of the mounting ring on the same side via a second spring. In this invention, the support ring provides support for the second spring, the second spring provides support for the mounting ring, and the mounting ring provides support for the infrared ranging sensor, thereby providing buffering for the infrared ranging sensor via the second spring.

[0015] Furthermore, a buffer layer is provided between the pressure-resistant shell and the mounting groove. In this invention, the buffer layer between the pressure-resistant shell and the mounting groove provides buffering for the pressure-resistant shell.

[0016] Furthermore, the stabilizing component also includes a tube installed on the outer surface of one end of the first piston cylinder near the bearing seat, and a barometer connected to one end of the tube extending to the outside. The barometer is installed outside the high-pressure cylinder housing. In this invention, the barometer is used to monitor the internal air pressure environment of the first piston cylinder, thereby assisting the infrared ranging sensor in monitoring when the first piston cylinder retracts, that is, when the high-pressure cylinder housing expands.

[0017] Furthermore, the pressure-resistant shell has multiple through holes on both sides corresponding to the second piston cylinder. In this invention, the pressure-resistant shell allows the second piston cylinder to pass through the through holes.

[0018] Furthermore, a buffer pad is installed on one end surface of the piston rod of the second piston cylinder.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] Firstly, the present invention uses an infrared ranging sensor to monitor the gap between the cylinder and the bearing housing, so that when the cylinder expands freely in the vertical direction, the infrared ranging sensor can transmit an electrical signal with information about the sliding pin gap to the controller connected to it for the controller to make a judgment.

[0021] Secondly, when the high-pressure cylinder housing expands, the first piston cylinder retracts and supplies air to the second piston cylinder, causing the second piston cylinder to extend. This clamps the infrared ranging sensor during the expansion of the high-pressure cylinder housing, reducing the relative sway of the infrared ranging sensor and enabling stable detection by the infrared ranging sensor.

[0022] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is an isometric view of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the high-pressure cylinder housing of the present invention;

[0026] Figure 4 for Figure 3 Enlarged view of the structure of area A in the middle;

[0027] Figure 5This is an exploded view of the detection device of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the shock absorption component of the present invention;

[0029] Figure 7 This is a right view of the present invention;

[0030] Figure 8 This is a top view of the present invention.

[0031] In the diagram: 10, bearing housing; 20, high-pressure cylinder housing; 30, vertical pin; 40, detection device; 41, mounting groove; 42, pressure-resistant shell; 43, infrared ranging sensor; 44, stabilizing component; 441, first piston cylinder; 4411, air outlet; 442, clamping component; 4421, second piston cylinder; 4422, first spring; 4423, clamping ring; 4424, air inlet; 4425, buffer pad; 45, buffer layer; 46, shock absorption component; 461, support ring; 462, mounting ring; 463, second spring; 50, pin groove. Detailed Implementation

[0032] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] For an example, please refer to the appendix. Figure 1-8A mechanism for detecting the sliding pin gap of a bearing housing inside a steam turbine includes a bearing housing 10 and a high-pressure cylinder housing 20 connected to one side of the bearing housing 10. The bearing housing 10 is characterized in that a vertical pin 30 is provided on the surface of the bearing housing 10 near the high-pressure cylinder housing 20, and a pin groove 50 is provided on the side of the high-pressure cylinder housing 20 near the bearing housing 10 for the vertical pin 30 to pass through. A detection device 40 is provided in the groove of the pin groove 50.

[0036] The detection device 40 includes a mounting groove 41 located at one end of the pin groove 50 away from the bearing seat 10, and a pressure-resistant shell 42 located inside the mounting groove 41. An infrared ranging sensor 43 is mounted on the shell of the pressure-resistant shell 42, and stabilizing components 44 located on both sides of the infrared ranging sensor 43 are located inside the pressure-resistant shell 42.

[0037] The stabilizing component 44 includes a first piston cylinder 441 that passes through the housing of the pressure-resistant shell 42, and a clamping component 442 connected to the outlet end of the first piston cylinder 441. The actuating end of the clamping component 442 is connected to the infrared ranging sensor 43.

[0038] For details, please refer to the appendix. Figure 4 and 5 The clamping component 442 includes a plurality of second piston cylinders 4421 that pass through the pressure-resistant shell 42. The air inlet end of the second piston cylinder 4421 is connected to the air outlet end of the first piston cylinder 441, and the piston rod of the second piston cylinder 4421 abuts against the infrared ranging sensor 43.

[0039] The outer surface of the first piston cylinder 441 is provided with a plurality of air outlets 4411, the air outlets 4411 are connected to the air inlet 4424 through air supply pipes, and the air inlet 4424 is installed on the lower surface of the second piston cylinder 4421.

[0040] It should be noted that in this embodiment, when the first piston cylinder 441 retracts, it supplies air to the second piston cylinder 4421 so that the second piston cylinder 4421 extends, thereby clamping the infrared ranging sensor 43 when the high-pressure cylinder housing 20 expands, reducing the relative shaking of the infrared ranging sensor 43, and enabling the infrared ranging sensor 43 to perform stable detection.

[0041] Furthermore, the air inside the first piston cylinder 441 is discharged through the outlet 4411, and the gas enters the second piston cylinder 4421 through the gas supply pipe and the inlet 4424, thereby supplying gas to the second piston cylinder 4421.

[0042] The gas supply line can be a fixed straight pipe or a flexible hose.

[0043] For details, please refer to the appendix. Figure 4 and 5 A clamping ring 4423 is installed on the outer surface of the piston rod of the second piston cylinder 4421 near the infrared ranging sensor 43. A first spring 4422 is abutted between the clamping ring 4423 and the infrared ranging sensor 43. The first spring 4422 is sleeved on the outside of the piston rod of the second piston cylinder 4421.

[0044] Two clamping blocks 431 are installed on the outer surface of the infrared ranging sensor 43 for the piston rod of the second piston cylinder 4421 to abut against each other. The two clamping blocks 431 are symmetrically arranged with the infrared ranging sensor 43 as the central axis.

[0045] It should be noted that, in this embodiment, when the piston rod of the second piston cylinder 4421 extends to push the first spring 4422, the compressed first spring 4422, together with the piston rod of the second piston cylinder 4421, clamps the infrared ranging sensor 43. When the piston rod of the second piston cylinder 4421 does not extend, the extension and retraction of the first spring 4422 provides a buffer for the infrared ranging sensor 43.

[0046] Furthermore, the infrared ranging sensor 43, model GP2Y0A21YK0F, increases the contact area between itself and the piston rod of the second piston cylinder 4421 by using a clamping block 431.

[0047] For details, please refer to the appendix. Figure 4 and 5 The pressure-resistant shell 42 is connected to the infrared ranging sensor 43 via a shock-absorbing assembly 46. The shock-absorbing assembly 46 includes a support ring 461 passing through both ends of the pressure-resistant shell 42 and a mounting ring 462 sleeved on both ends of the infrared ranging sensor 43. The inner ring surface of the support ring 461 is connected to the outer ring surface of the mounting ring 462 on the same side via a second spring 463.

[0048] A buffer layer 45 is provided between the pressure-resistant shell 42 and the groove of the mounting groove 41;

[0049] It should be noted that in this embodiment, the support ring 461 provides support for the second spring 463, the second spring 463 provides support for the mounting ring 462, and the mounting ring 462 provides support for the infrared ranging sensor 43, thereby providing buffer for the infrared ranging sensor 43 through the second spring 463.

[0050] Furthermore, the pressure-resistant housing 42 is cushioned by the buffer layer 45 between the pressure-resistant housing 42 and the mounting groove 41.

[0051] For details, please refer to the appendix. Figure 3 and 4 The stabilizing component 44 further includes a tube 443 installed on the outer surface of one end of the first piston cylinder 441 near the bearing seat 10, and a barometer 444 connected to one end of the tube 443 extending to the outside. The barometer 444 is installed outside the high-pressure cylinder housing 20.

[0052] The pressure-resistant shell 42 has multiple through holes 421 on both sides of the shell, which correspond to the second piston cylinder 4421;

[0053] A buffer pad 4425 is installed on one end surface of the piston rod of the second piston cylinder 4421;

[0054] It should be noted that in this embodiment, the barometer 444 is connected to the first piston cylinder 441 through the tube 443, so that the barometer 444 can monitor the internal air pressure environment of the first piston cylinder 441. Thus, when the first piston cylinder 441 retracts, that is, when the high-pressure cylinder housing 20 expands, it can assist the infrared ranging sensor 43 in monitoring.

[0055] Furthermore, the pressure shell 42 allows the second piston cylinder 4421 to pass through the through hole 421.

[0056] The specific operation method of this invention is as follows:

[0057] Since the infrared ranging sensor 43 is embedded in the pin groove 50 on the high-pressure cylinder housing 20, the gap between it and the bearing seat 10 is monitored by the infrared ranging sensor 43. When the cylinder expands freely in the vertical direction, the infrared ranging sensor 43 can transmit an electrical signal with the information of the sliding pin gap to the controller connected to it.

[0058] When the high-pressure cylinder housing 20 expands, the first piston cylinder 441 retracts and supplies air to the second piston cylinder 4421, causing the second piston cylinder 4421 to extend. This allows the infrared ranging sensor 43 to be clamped during the expansion of the high-pressure cylinder housing 20, reducing the relative sway of the infrared ranging sensor 43 and enabling the infrared ranging sensor 43 to perform stable detection.

[0059] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A mechanism for detecting the sliding pin gap of an internal bearing housing in a steam turbine, comprising a bearing housing (10) and a high-pressure cylinder housing (20) connected to one side of the bearing housing (10), characterized in that, The bearing housing (10) has a vertical pin (30) on one side surface near the high-pressure cylinder housing (20), and the high-pressure cylinder housing (20) has a pin groove (50) on one side near the bearing housing (10) for the vertical pin (30) to pass through. A detection device (40) is provided in the groove of the pin groove (50). The detection device (40) includes a mounting groove (41) located at one end of the pin groove (50) away from the bearing seat (10), and a pressure-resistant shell (42) located inside the mounting groove (41). An infrared ranging sensor (43) is mounted on the shell of the pressure-resistant shell (42), and stabilizing components (44) located on both sides of the infrared ranging sensor (43) are provided inside the pressure-resistant shell (42). The stabilizing component (44) includes a first piston cylinder (441) that passes through the housing of the pressure-resistant shell (42), a clamping component (442) connected to the outlet end of the first piston cylinder (441), and the actuating end of the clamping component (442) connected to the infrared ranging sensor (43). The clamping component (442) includes a plurality of second piston cylinders (4421) that pass through the housing of the pressure-resistant shell (42). The air inlet end of the second piston cylinder (4421) is connected to the air outlet end of the first piston cylinder (441), and the piston rod of the second piston cylinder (4421) abuts against the infrared ranging sensor (43). The outer surface of the first piston cylinder (441) is provided with a plurality of air outlets (4411), the air outlets (4411) are connected to the air inlet (4424) through air supply pipes, and the air inlet (4424) is installed on the lower surface of the second piston cylinder (4421). A clamping ring (4423) is installed on the outer surface of the piston rod of the second piston cylinder (4421) near the infrared ranging sensor (43). A first spring (4422) abuts against the clamping ring (4423) and the infrared ranging sensor (43). The first spring (4422) is sleeved on the outside of the piston rod of the second piston cylinder (4421). Two clamping blocks (431) are mounted on the outer surface of the infrared ranging sensor (43) for the clamping ring (4423) to abut against each other. The two clamping blocks (431) are symmetrically arranged with the infrared ranging sensor (43) as the central axis.

2. The mechanism for detecting the sliding pin gap of an internal bearing housing in a steam turbine according to claim 1, characterized in that, The pressure-resistant shell (42) is connected to the infrared ranging sensor (43) via a shock-absorbing assembly (46). The shock-absorbing assembly (46) includes a support ring (461) passing through both ends of the pressure-resistant shell (42) and a mounting ring (462) sleeved on both ends of the infrared ranging sensor (43). The inner ring surface of the support ring (461) is connected to the outer ring surface of the mounting ring (462) on the same side via a second spring (463).

3. The mechanism for detecting the sliding pin gap of an internal bearing housing in a steam turbine according to claim 1, characterized in that, A buffer layer (45) is provided between the pressure shell (42) and the groove of the mounting groove (41).

4. The mechanism for detecting the sliding pin gap of an internal bearing housing in a steam turbine according to claim 1, characterized in that, The stabilizing component (44) also includes a tube (443) mounted on the outer surface of one end of the first piston cylinder (441) near the bearing seat (10), and a barometer (444) connected to one end of the tube (443) extending to the outside, the barometer (444) being mounted outside the high-pressure cylinder housing (20).

5. A mechanism for detecting the sliding pin gap of an internal bearing housing in a steam turbine according to claim 1, characterized in that, The pressure-resistant shell (42) has multiple through holes (421) on both sides of the shell corresponding to the second piston cylinder (4421).

6. A mechanism for detecting the sliding pin gap of an internal bearing housing in a steam turbine according to claim 1, characterized in that, A buffer pad (4425) is installed on one end of the piston rod of the second piston cylinder (4421).

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