Disassembling and assembling tool for bearing bush temperature measuring resistor of water-turbine generator set

Abstract

The utility model relates to the technical field of hydro-generators, in particular to a water-turbine generator set bearing bush temperature measurement resistor dismounting tool which comprises a dismounting assembly, a bearing bush is installed on the top of the dismounting assembly, a temperature measurement resistor is installed on the top of the bearing bush, and the temperature measurement resistor comprises a temperature measurement resistor body, an insulating plastic sleeve and a signal line. A position hole is formed in the top of the bearing bush, and the dismounting and mounting assembly comprises a bearing bush tray, a rotating bearing, a supporting block and a bottom plate. According to the disassembly and assembly tool for the temperature measurement resistor of the bearing bush of the water-turbine generator set, through the unique design, the temperature measurement resistor can be quickly and effectively disassembled and assembled under the condition that a signal line is not disassembled. Due to the characteristic, the workload in the maintenance process is remarkably reduced, the working efficiency is improved, and meanwhile, the unit protection misoperation possibly caused by wrong wire disassembly and connection is avoided, so that the stable operation of the unit is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbine generators, in particular to a tool for disassembling and assembling a temperature measuring resistor of a water turbine generator set bearing. Background Art

[0002] The bearing temperature measuring resistor is an important part of the hydro-turbine generator set. Its main function is to monitor the change of the bearing temperature of the hydro-turbine generator set during operation. It is an important data to ensure the safe and stable operation of the hydropower station unit. At present, the basic method is to install a temperature measuring resistor (PT100) on the guide bearing and combine it with a computer monitoring system to detect and alarm the bearing temperature. When the bearing temperature rises above the set value during the operation of the unit, the bearing temperature protection of the unit is activated, and the protection action directly trips and shuts down. Therefore, in order to ensure the reliability of the bearing temperature protection action, the temperature measuring resistor needs to be checked and calibrated during the unit maintenance to ensure its sensitivity and the accuracy of the measured value.

[0003] There are many reasons for the increase of bearing temperature during the operation of the unit, mainly the following aspects:

[0004] Turbine failure or changes in the operating environment can lead to increased vibration and swing, changes in bearing clearance, reduced oil level in the oil pan, and deterioration of oil quality; (2) Changes in ambient temperature, insufficient cooling water pressure and flow, and blockage of the cooler, which can reduce the cooling effect.

[0005] At present, the temperature measuring resistor is mainly installed by threading with the mounting hole on the bearing. Since the signal line of the temperature measuring resistor is long and the other end is fixed in the junction box, its signal line must be removed when disassembling and installing the temperature measuring resistor. During maintenance, the temperature measuring resistor needs to be unscrewed for inspection and calibration before being screwed in. When screwing in and out, the signal line of the temperature measuring resistor will twist. Since the signal line is short, the temperature measuring resistor cannot be taken out and the solder joint is often broken. To avoid this situation, on-site operations are to remove the signal line first, and then connect it after the calibration is completed and fixed. This greatly increases the workload and is prone to wiring errors, causing the unit protection to malfunction and cause the unit to shut down. Utility Model Content

[0006] The purpose of the utility model is to provide a tool for disassembling and assembling the temperature measuring resistor of the bearing of a hydro-turbine generator set, so as to solve the problem that the current temperature measuring resistor is mainly installed by threaded matching with the mounting hole on the bearing, and because the signal line of the temperature measuring resistor is long and the other end is fixed in the junction box, its signal line must be removed when disassembling and installing the temperature measuring resistor. During maintenance, the temperature measuring resistor needs to be unscrewed and checked and then screwed in. When screwing in and out, the signal line of the temperature measuring resistor will be twisted. Because the signal line is short, the temperature measuring resistor cannot be taken out and the welding point is broken. To avoid this situation, the on-site operation is to remove the signal line first, and then connect it after the verification is completed and fixed.

[0007] To achieve the above-mentioned purpose, the utility model provides a hydro-turbine generator set bearing temperature measuring resistor disassembly and assembly tool, including a disassembly and assembly component, a bearing is installed on the top of the disassembly and assembly component, a temperature measuring resistor is installed on the top of the bearing, the temperature measuring resistor includes a temperature measuring resistor body, an insulating plastic sleeve and a signal line, a position hole is provided on the top of the bearing, and the disassembly and assembly component includes a bearing tray, a rotating bearing, a support block and a base plate.

[0008] Preferably, the insulating plastic sleeve has a positive external thread, and the position hole has a positive internal thread for fixing the temperature measuring resistor, and the two positive internal and external threads match each other.

[0009] Preferably, two support blocks are welded on the base plate to raise the rotating bearing. The support blocks are welded to the outer ring of the rotating bearing. The bottom of the bearing tray is welded to the inner ring of the rotating bearing. The outer ring of the rotating bearing is fixed, and the rotation of the inner ring drives the bearing tray to rotate.

[0010] Preferably, the temperature measuring resistor is installed on the bearing shell by threaded fitting, and the bearing shell is placed on a disassembly assembly component. The bearing shell tray of the disassembly assembly component is rotated to drive the bearing shell to rotate, thereby realizing the disassembly and assembly of the temperature measuring resistor without removing the wires.

[0011] Preferably, the middle portion of the insulating plastic sleeve is a hollow structure, a hexagonal terminal is installed on the top, and the bottom end of the signal line passes through the insulating plastic sleeve and is connected to the temperature measuring resistor body.

[0012] Preferably, an insulating plate is installed at the bottom of the base plate.

[0013] Preferably, the middle portion of the bearing tray is a hollow structure, a clamping ring is provided at the bottom, and the bottom of the clamping ring is welded to the inner ring of the rotating bearing.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The unique design of the hydraulic turbine generator bearing temperature measuring resistor disassembly and assembly tool enables the rapid and effective disassembly and assembly of the temperature measuring resistor without removing the signal line. This feature significantly reduces the workload during the maintenance process, improves work efficiency, and avoids the misoperation of the unit protection caused by the wrong disassembly and wiring, thereby ensuring the stable operation of the unit.

[0016] Secondly, the tool's rotating bearing design allows the bearing tray to rotate easily, thereby driving the bearing and temperature measuring resistor to rotate, making disassembly and assembly operations convenient. This design not only simplifies the operation process, but also reduces the skill requirements for operators, improving the convenience and safety of work.

[0017] In general, the hydro-turbine generator set bearing temperature measuring resistor disassembly and assembly tool, through its unique design and function, realizes the fast, safe and effective disassembly and assembly of the temperature measuring resistor, significantly improves the maintenance efficiency and safety of the hydro-turbine generator set, and provides a strong guarantee for the safe and stable operation of the hydropower station. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the temperature measuring resistor in the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the central bearing bush of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the disassembly and assembly components in the utility model.

[0022] The meaning of each number in the figure is:

[0023] 1. Thermometer resistor; 101. Thermometer resistor body; 102. Signal line; 103. Insulating plastic sleeve; 2. Bearing; 201. Position hole; 3. Disassembly and assembly components; 301. Bearing tray; 302. Rotating bearing; 303. Support block; 304. Bottom plate; 3041. Insulation plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model provides a tool for disassembling and assembling the temperature measuring resistor of the bearing of a water turbine generator set, such as Figure 1-Figure 4As shown, it includes a disassembly assembly 3, a bearing 2 is installed on the top of the disassembly assembly 3, a temperature measuring resistor 1 is installed on the top of the bearing 2, the temperature measuring resistor 1 includes a temperature measuring resistor body 101, an insulating plastic sleeve 103 and a signal line 102, a position hole 201 is provided on the top of the bearing 2, and the disassembly assembly 3 includes a bearing tray 301, a rotating bearing 302, a support block 303 and a bottom plate 304. The disassembly assembly 3 is the core part of the entire disassembly tool, which is responsible for supporting and rotating the bearing 2, thereby realizing the disassembly and assembly of the temperature measuring resistor 1. The component is exquisitely designed and has a stable structure, which can ensure the stability and accuracy of the bearing 2 and the temperature measuring resistor 1 during the disassembly and assembly process. The bearing tray 301 is an important component in the disassembly assembly 3, which directly carries the bearing 2. The middle part of the tray is designed as a hollow structure, and a clamping ring is provided at the bottom. The bottom of the clamping ring is welded to the inner ring of the rotating bearing 302. Such a design enables the tray to rotate with the inner ring of the rotating bearing 302, thereby driving the bearing 2 to rotate. This rotation method is very important for realizing the rapid disassembly and assembly of the temperature measuring resistor 1. The rotating bearing 302 is a rotating component in the disassembly and assembly component 3, which is responsible for providing rotational power so that the bearing tray 301 and the bearing 2 can rotate together. The outer ring of the rotating bearing 302 is fixed, and the inner ring can rotate. This design ensures the stability and accuracy of the rotation. At the same time, the rotating bearing 302 also has a high load-bearing capacity and wear resistance, which can ensure that it maintains good rotation performance during long-term use. The support block 303 is welded on the base plate 304 and is used to raise the rotating bearing 302 so that the bearing tray 301 and the bearing 2 can be rotated at a suitable height. The support block 303 has high strength and stability, which can ensure that no deformation or displacement occurs during the disassembly and assembly process, thereby ensuring the accuracy and safety of the disassembly and assembly. The base plate 304 is the basic component of the entire disassembly and assembly component 3, which carries the support block 303, the rotating bearing 302, the bearing tray 301 and other components. An insulating plate 3041 is also installed at the bottom of the base plate 304 to prevent electrical safety problems that may occur during the disassembly process. The base plate 304 has high strength and rigidity, which can ensure that it will not be deformed or damaged during the disassembly process. The bearing 2 is a component installed on the top of the disassembly component 3. A position hole 201 is set on its top for installing the temperature measuring resistor 1. There is a positive internal thread on the position hole 201, which cooperates with the positive external thread on the insulating plastic sleeve 103 on the temperature measuring resistor 1, thereby achieving the fixation of the temperature measuring resistor 1. The bearing 2 will rotate with the bearing tray 301 during the disassembly process, thereby achieving the disassembly of the temperature measuring resistor 1.

[0026] In this embodiment, the insulating plastic sleeve 103 has a positive external thread, and the position hole 201 has a positive internal thread, which are used to fix the temperature measuring resistor 1, and the two positive internal and external threads match each other.

[0027] Furthermore, the insulating plastic sleeve 103 has a positive external thread, which cooperates with the positive internal thread on the position hole 201 on the bearing 2, so as to fix the temperature measuring resistor 1. The bottom end of the signal line 102 passes through the insulating plastic sleeve 103 and is connected to the temperature measuring resistor body 101, which is used to transmit the temperature measuring signal. During the disassembly and assembly process, the temperature measuring resistor 1 will rotate with the bearing 2, but because the reserved amount of the signal line 102 is long enough, it will not be twisted or broken. This design makes it possible to quickly and effectively disassemble and assemble the temperature measuring resistor without removing the signal line.

[0028] Specifically, two support blocks 303 are welded on the base plate 304 to raise the rotating bearing 302. The support blocks 303 are welded to the outer ring of the rotating bearing 302. The bottom of the bearing tray 301 is welded to the inner ring of the rotating bearing 302. The outer ring of the rotating bearing 302 is fixed, and the rotation of the inner ring drives the bearing tray 301 to rotate. The temperature measuring resistor 1 is a component installed on the top of the bearing 2, and it is responsible for monitoring the temperature change of the bearing.

[0029] Furthermore, the temperature measuring resistor 1 is installed on the bearing 2 through threaded fitting, the bearing 2 is placed on the disassembly assembly 3, and the bearing tray 301 of the disassembly assembly 3 is rotated to drive the bearing 2 to rotate, thereby realizing the disassembly and assembly of the temperature measuring resistor 1 without removing the wires.

[0030] Furthermore, the middle of the insulating plastic sleeve 103 is a hollow structure, and a hexagonal terminal is installed on the top. The bottom end of the signal line 102 passes through the insulating plastic sleeve 103 and is connected to the temperature measuring resistor body 101.

[0031] Furthermore, an insulating plate 3041 is installed at the bottom of the base plate 304 to provide a good insulation effect.

[0032] Furthermore, the middle part of the bearing tray 301 is a hollow structure, and a clamping ring is provided at the bottom, and the bottom of the clamping ring is welded to the inner ring of the rotating bearing 302.

[0033] When the utility model is used, the temperature measuring resistor disassembly tool for the bearing of the hydro-turbine generator set is first installed on the position hole 201 of the bearing 2 through threaded matching, wherein the positive external thread on the insulating plastic sleeve 103 of the temperature measuring resistor 1 matches the positive internal thread on the position hole 201 to ensure the stable installation of the temperature measuring resistor 1. Then, the bearing 2 is placed on the bearing tray 301 of the disassembly component 3.

[0034] Then, by rotating the bearing tray 301 of the disassembly assembly 3, the bottom of the bearing tray 301 is welded to the inner ring of the rotating bearing 302, so the rotation of the bearing tray 301 will drive the inner ring of the rotating bearing 302 to rotate together. Since the outer ring of the rotating bearing 302 is fixed, the rotation of the inner ring will be smoothly and accurately transmitted to the bearing tray 301, thereby driving the bearing 2 to rotate.

[0035] During the rotation of the bearing bush 2, the temperature measuring resistor 1 will rotate with the bearing bush 2 because the temperature measuring resistor 1 is fixed to the bearing bush 2 by threads. At this time, since the signal line 102 of the temperature measuring resistor 1 is long enough, the signal line 102 will not be twisted or broken due to the rotation.

[0036] When the bearing bush 2 and the temperature measuring resistor 1 are rotated to a suitable position, the temperature measuring resistor 1 can be easily removed or installed. The entire disassembly and assembly process does not require the removal of the signal line 102, which greatly improves the work efficiency and avoids the possible misoperation of the unit protection caused by the wrong disassembly and wiring, ensuring the safe and stable operation of the unit.

[0037] In addition, an insulating plate 3041 is installed at the bottom of the bottom plate 304 of the disassembly assembly 3, which effectively prevents electrical safety problems that may occur during the disassembly process and further ensures the safety of the operator. At the same time, the bearing tray 301, the rotating bearing 302 and the support block 303 are exquisitely designed and have a stable structure, ensuring the stability and accuracy of the disassembly process.

[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A tool for disassembling and assembling a temperature measuring resistor of a bearing of a hydro-turbine generator set, comprising a disassembling and assembling component (3), characterized in that: A bearing (2) is installed on the top of the disassembly assembly (3), a temperature measuring resistor (1) is installed on the top of the bearing (2), the temperature measuring resistor (1) comprises a temperature measuring resistor body (101), an insulating plastic sleeve (103) and a signal line (102), a position hole (201) is provided on the top of the bearing (2), and the disassembly assembly (3) comprises a bearing tray (301), a rotating bearing (302), a support block (303) and a bottom plate (304).

2. The hydraulic generator bearing temperature measuring resistor disassembly and assembly tool according to claim 1 is characterized by: The insulating plastic sleeve (103) has a positive external thread, and the position hole (201) has a positive internal thread, which are used to fix the temperature measuring resistor (1), and the two positive internal and external threads match each other.

3. The hydraulic generator bearing temperature measuring resistor disassembly and assembly tool according to claim 1 is characterized by: Two support blocks (303) are welded on the bottom plate (304) for raising the rotating bearing (302); the support blocks (303) are welded to the outer ring of the rotating bearing (302); the bottom of the bearing tray (301) is welded to the inner ring of the rotating bearing (302); the outer ring of the rotating bearing (302) is fixed, and the rotation of the inner ring drives the bearing tray (301) to rotate.

4. The hydraulic generator bearing temperature measuring resistor disassembly and assembly tool according to claim 1, characterized in that: The temperature measuring resistor (1) is installed on the bearing bush (2) through threaded engagement; the bearing bush (2) is placed on a disassembly assembly (3); the bearing bush tray (301) of the disassembly assembly (3) is rotated, thereby driving the bearing bush (2) to rotate, thereby achieving disassembly and assembly of the temperature measuring resistor (1) without removing the wires.

5. The hydraulic generator bearing temperature measuring resistor disassembly and assembly tool according to claim 1, characterized in that: The middle part of the insulating plastic sleeve (103) is a hollow structure, and a hexagonal terminal is installed on the top. The bottom end of the signal line (102) passes through the insulating plastic sleeve (103) and is connected to the temperature measuring resistor body (101).

6. The hydraulic generator bearing temperature measuring resistor disassembly and assembly tool according to claim 1, characterized in that: An insulating plate (3041) is installed at the bottom of the base plate (304).

7. The hydraulic generator bearing temperature measuring resistor disassembly and assembly tool according to claim 1, characterized in that: The middle part of the bearing tray (301) is a hollow structure, and a clamping ring is arranged at the bottom. The bottom of the clamping ring is welded to the inner ring of the rotating bearing (302).

Images