A repair device and repair method for a tilting pad bearing of a gas turbine equipment

Abstract

The present invention discloses a maintenance device and a maintenance method for a tilting pad bearing of a gas turbine device. The maintenance device includes a semi-ring member, and there are horizontal extension parts at both ends of the semi-ring member. A jacking device for lifting the semi-ring member is provided on the extension parts. An adjusting block capable of sliding along the semi-ring member is provided on the semi-ring member, and a fastening bolt is provided on the adjusting block. The adjusting block of the present invention can move on the semi-ring member. By cooperating with adjusting blocks of different specifications, the lifting and fixing of the shaft bodies of gas turbine devices of different specifications can be realized, which is convenient for the movement and replacement of the tilting pad bearing of the rotor. Through the maintenance device, the maintenance method for the tilting pad bearing of the gas turbine device is made more convenient, without the intervention of large-scale hoisting equipment, and the effect of being able to maintain the tilting pad bearing on-site only by disassembling the compressor casing of the gas turbine device is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of turbine equipment maintenance, and more specifically, to a maintenance device and a maintenance method for a tilting pad bearing of a gas turbine equipment. Background Art

[0002] A gas turbine is an internal combustion power machine that uses continuously flowing gas as the working medium to drive the impeller to rotate at a high speed, converting the internal energy of the fuel into useful work. The gas turbine fluid working medium can be gas or liquid, and it is a rotating impeller type heat engine. Due to its fast start-up, large power density, and small volume, gas turbines are widely used in offshore oil exploitation platforms. It mainly consists of three major components: a compressor, a combustion chamber, and a power turbine. Among them, a tilting pad bearing for supporting the compressor rotor is installed at the shaft end of the compressor, and the lubrication and support effects of this tilting pad bearing directly affect the safe operation of the gas turbine. During the daily use of gas turbine equipment, wear of the tilting pad bearing and wear of the shaft neck of the gas turbine equipment shaft may be caused due to reasons such as lack of oil in the tilting pad bearing of the shaft end, unclean lubricating oil, and exceeding the service life of the bearing bush, resulting in an increase in the vibration frequency of the compressor or damage to the compressor.

[0003] Currently, gas turbine equipment is widely used and has a very high market share in the professional power generation industry in China. In order to eliminate the wear generated by the tilting pad bearing during operation and protect the safe operation of the gas turbine equipment, it is necessary to replace the damaged or abnormally faulty tilting pad bearing. However, due to the extremely high manufacturing technology requirements of gas turbines, domestic gas turbines are still in their infancy and basically rely on imported equipment from foreign manufacturers. Therefore, maintenance work on bearings of this kind is often required to be sent back to the factory for maintenance or to be repaired by using a large hoisting device to lift the rotor. However, the cost of sending back to the factory for maintenance is high, the time cycle is long, and the disassembly and maintenance workload is large. Moreover, the maintenance method of using a large hoisting device to lift the rotor has problems such as large operation difficulty, low precision, and easy damage to the compressor blades. The actual maintenance operation is difficult and the use effect is not good. Summary of the Invention

[0004] The purpose of the present invention is to overcome the difficulties in adapting the maintenance methods and operation method devices of the tilting pad bearing to the on-site gas turbine maintenance requirements, and at the same time be applicable to the maintenance of shafts of different specifications, and provide a maintenance device and a maintenance method for a tilting pad bearing of a gas turbine equipment. The present invention realizes the lifting and fixing of the shaft of the gas turbine equipment through a simple mechanical structure, realizes precise lifting control, and can quickly complete the replacement work of the tilting pad bearings of the rotors of gas turbine equipment of different specifications.

[0005] The technical solution adopted by the present invention is:

[0006] A repair device for a tilting pad bearing of a gas turbine equipment, comprising a semi-ring member, with horizontal extension parts at both ends of the semi-ring member, and a jacking device for lifting the semi-ring member is provided on the extension parts. An adjustment block capable of sliding along the semi-ring member is provided on the semi-ring member, and a fastening bolt is provided on the adjustment block.

[0007] The working principle of the present invention is as follows: Place the semi-ring member above the shaft body of the gas turbine equipment. The extension parts at both ends of the semi-ring member are in contact with the cross-section of the bearing housing to form a support. A jacking device for lifting the semi-ring member is also provided on the extension parts, and the shaft body of the gas turbine equipment can be lifted by adjusting the jacking device. An adjustment block capable of sliding along the semi-ring member is provided on the semi-ring member, and a fastening bolt is provided on the adjustment block. The adjustment block is fixedly connected to the rotor end face of the gas turbine equipment through the fastening bolt. When the jacking device lifts the semi-ring member, it drives the shaft body of the gas turbine equipment to lift. Due to the lifting, a wide enough gap is generated between the shaft body and the tilting pad bearing. At this time, the lower half of the tilting pad bearing can be taken out and installed through the gap, which is convenient for repairing the tilting pad bearing.

[0008] Further, the extension part includes a base, and the base is fixedly connected to both ends of the semi-ring member. The base is horizontally arranged to ensure the stability of the semi-ring member during installation and lifting, and prevent the shaft body of the gas turbine equipment from falling due to imbalance and causing damage to the equipment.

[0009] Further, the extension part includes a base, and the base and the semi-ring member are of an integral structure. As one of the preferred solutions, the base and the semi-ring member are integrally formed, which can further simplify the components of the device. At the same time, since the base plays a supporting role, the integral structure can avoid the base from tilting and deforming due to other factors during installation, thereby affecting its support for the gas turbine equipment.

[0010] Further, the jacking device includes a threaded hole provided on the base, and a jacking bolt passing through and cooperating with the threaded hole. Lifting is achieved by rotating the bolt. Due to the small pitch of the thread, a more precise lifting process can be realized, and the operation process is controllable. When the base fits the end face of the tilting pad bearing, screw in the jacking bolt until its bottom end touches the end face of the tilting pad bearing. At this time, continue to screw the jacking bolt to make it slowly spiral downward. Since the end face of the tilting pad bearing is fixed, the spiral reaction force between the jacking bolt and the end face will cause the base to be lifted, and the semi-ring member, the adjustment block connected to the base, and the shaft body fixedly connected to the adjustment block will also be lifted accordingly.

[0011] Further, a chute is provided on the part of the semi-ring member where the adjustment block slides, and a slider cooperating with the chute is provided on the adjustment block.

[0012] Further, the cross-section of the sliding groove is in a "T" shape. The design of the "T" shaped cross-section facilitates the engagement of the adjustment block, preventing it from falling off, and enables the adjustment block to move along the semi-circular ring member to a suitable position. Correspondingly, the slider is designed in a hook-tooth shape, and the opening width of the slider is smaller than the width of the upper part of the "T" shaped cross-section of the semi-circular ring member. Therefore, the adjustment block can move on the semi-circular ring member without falling off.

[0013] Further, both ends of the semi-circular ring member are provided with insertion openings for the adjustment block to access. The position of the insertion opening is a narrowing structure, and its width is smaller than the opening width of the slider. When installing, the adjustment block is inserted into the semi-circular ring member from this position. Cooperating with the insertion opening, when the present invention adapts to gas turbine equipment of different specifications, the number of adjustment blocks can be increased or decreased according to actual needs.

[0014] Further, the number of the adjustment blocks is multiple sets, each set includes multiple adjustment blocks, and different sets of adjustment blocks have different thicknesses in the normal direction of their moving planes. The distances from the rotor end faces of gas turbine equipment of different specifications to their tilting pad bearings are different. Therefore, the present invention is provided with multiple sets of adjustment blocks, and different sets of adjustment blocks have different thicknesses in the normal direction of their moving planes. When implementing the present invention, adjustment blocks with appropriate thicknesses are selected according to the corresponding distances.

[0015] Further, the adjustment block is provided with an oblong hole, and the fastening bolt passes through the oblong hole and then connects to the gas turbine equipment. The positions of the threaded holes for installing balance screws on the rotor end faces of different specifications are different. Under the condition that the semi-circular ring member cannot be deformed, the oblong holes on the adjustment block cooperate with the adjustment block that can move along the semi-circular ring member, which can adapt to the threaded holes for installing balance screws at different positions, and the adjustment block is fixedly connected to the rotor end face through the fixing bolt.

[0016] The present invention also discloses a maintenance method for the tilting pad bearing of a gas turbine equipment, including the following steps:

[0017] S1. The casing of the gas turbine equipment is usually assembled by an upper casing and a lower casing. Disassemble the upper casing of the gas turbine equipment and the upper half of the tilting pad bearing seat along the horizontal direction of the gas turbine equipment to expose the end face of the rotor of the gas turbine equipment and the cross-section of the tilting pad bearing seat;

[0018] S2. According to the distance between the tilting pad bearing seat and the end face of the inner rotor of the gas turbine equipment, select a corresponding set of adjustment blocks and the fastening bolts used in cooperation with the adjustment blocks. The thickness of the adjustment block in the normal direction of its moving plane is the same as the distance between the tilting pad bearing seat and the rotor end face, and the number of adjustment blocks is the same as the number of bolt blind holes on the rotor end face. The blind holes are the bolt holes for installing balance screws and are necessary structures on the rotor end face;

[0019] S3. Assemble the adjustment block and the semi-ring component so that the adjustment block can slide along the semi-ring component. When the adjustment block slides to align with the bolt blind hole on the rotor end face, sequentially fix and connect each adjustment block to the rotor through fastening bolts;

[0020] S4. The horizontally extended parts at both ends of the semi-ring component abut against the cross-section of the tilting pad bearing housing;

[0021] S5. Use the jacking device provided at the extended part to slowly lift the semi-ring component, and drive the rotor inside the gas turbine equipment to lift through the adjustment block;

[0022] S6. Due to the lifting of the rotor, a sufficiently wide gap is generated between the shaft extending from one end of the rotor and the tilting pad bearing, so that the tilting pad bearing can be taken out and installed through the gap without disassembling the entire gas turbine equipment.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. The present invention provides a maintenance device for the tilting pad bearing of a gas turbine equipment. By cooperating with adjustment blocks of different specifications, it can realize the lifting and fixing of the shaft bodies of gas turbine equipments of different specifications, facilitating the movement and replacement of the tilting pad bearings of the gas turbine equipment;

[0025] 2. The overall structure of the present invention is designed compactly, and it can precisely lift the rotor of the gas turbine equipment on-site, reducing the maintenance difficulty and duration;

[0026] 3. The present invention also provides a maintenance method for the tilting pad bearing of a gas turbine equipment. When used in cooperation with the maintenance device, the maintenance process is more convenient, without the intervention of large lifting equipment, achieving the effect of being able to maintain the tilting pad bearing on-site only by disassembling the casing of the gas turbine equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the overall structural schematic diagram of the present invention;

[0028] Figure 2 is Figure 1 the front view in the A direction of

[0029] Figure 3 is the schematic diagram of the present invention installed on the gas turbine equipment.

[0030] In the drawings: 1 - semi-ring component, 2 - base, 3 - adjustment block, 4 - fastening bolt, 5 - jacking bolt, 6 - insertion opening, 7 - oblong hole, 81 - gas turbine equipment shaft body, 82 - rotor end face, 83 - tilting pad bearing housing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The present invention will be further described below in conjunction with specific embodiments. Among them, the attached drawings are only for illustrative purposes and cannot be construed as a limitation of this patent; in order to better illustrate this embodiment, some components in the attached drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.

[0032] In the attached drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "front", "rear", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the attached drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the attached drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly indicating the quantity of the technical features indicated. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0033] Embodiment 1:

[0034] As Figure 1 or Figure 3 shown, this embodiment discloses a maintenance device for a tilting pad bearing of a gas turbine device, including a half-ring member 1. The two ends of the half-ring member 1 have horizontal extension parts, and a jacking device for lifting the half-ring member 1 is provided on the extension parts. An adjustment block 3 capable of sliding along the half-ring member 1 is provided on the half-ring member 1, and a fastening bolt 4 is provided on the adjustment block 3.

[0035] The maintenance method for the tilting pad bearing of the gas turbine device using this embodiment includes the following steps:

[0036] S1. The casing of the gas turbine device is usually assembled from an upper casing and a lower casing. Disassemble the upper casing of the gas turbine device and the upper half of the tilting pad bearing housing along the horizontal direction of the gas turbine device to expose the end face 82 of the gas turbine device rotor and the tilting pad bearing housing 83;

[0037] S2. Select a corresponding set of adjusting blocks 3 and fastening bolts 4 used in conjunction with the adjusting blocks 3 according to the spacing between the tilting pad bearing housing 83 and the end face 82 of the inner rotor of the gas turbine equipment. The thickness of the adjusting block 3 in the normal direction of its moving plane is the same as the spacing between the tilting pad bearing housing 83 and the rotor end face 82. The number of adjusting blocks 3 is the same as the number of bolt blind holes on the rotor end face 82, both being four. The blind holes are bolt holes for installing balance screws and are necessary structures on the rotor end face 82.

[0038] S3. Assemble the adjusting block 3 with the half-ring member 1 so that the adjusting block can slide along the half-ring member 1. When the adjusting block slides to align with the bolt blind holes on the rotor end face 82, sequentially fixedly connect each adjusting block 3 to the rotor through the fastening bolt 4.

[0039] S4. The horizontally extended parts at both ends of the half-ring member 1 are in contact with the cross-section of the tilting pad bearing housing 83.

[0040] S5. Slowly lift the half-ring member 1 through the jacking device provided on the extended part, and drive the shaft body 81 of the gas turbine equipment to lift through the adjusting block 3.

[0041] S6. Since the shaft body 81 of the gas turbine equipment is lifted, a sufficiently wide gap is generated between the shaft body and the tilting pad bearing. Then, without disassembling the entire gas turbine equipment, the tilting pad bearing can be taken out and installed through the gap, and the tilting pad bearing can be repaired.

[0042] Embodiment Two:

[0043] As Figure 1 or Figure 2 shown, on the basis of Embodiment One, this embodiment further discloses that the extended part includes a base 2, and the base 2 is fixedly connected to both ends of the half-ring member 1. As one of the preferred solutions, the base 2 and the half-ring member 1 are of an integral structure. The base 2 is horizontally arranged to ensure the stability of the half-ring member 1 during installation and lifting, preventing the gas turbine equipment from falling due to imbalance and causing damage to the equipment. The integral molding of the base 2 and the half-ring member 1 can further simplify the components of this embodiment. At the same time, since the base 2 plays a supporting role, the integral molding structure can avoid the base 2 from tilting and deforming due to other factors during installation, thereby affecting its support for the gas turbine equipment. The other structures and working principles of this embodiment are the same as those of Embodiment One.

[0044] Embodiment Three:

[0045] As Figure 1 or Figure 2As shown, on the basis of Embodiment 2, this embodiment further discloses that the shown jacking device includes a threaded hole provided on the base 2 and a jacking bolt 5 passing through and mating with the threaded hole. In this embodiment, the bottom surface of the base 2 maintains the same horizontal position and can fit onto the same plane. At the same time, the length of the jacking bolt 5 is greater than the height of the base 2, and the extra length is greater than the height that the shaft body of the gas turbine equipment needs to be jacked up. In this embodiment, when the base 2 fits onto the tilting pad bearing housing 83, the jacking bolt 5 is screwed in until one end of the jacking bolt 5 abuts against the tilting pad bearing housing 83. At this time, two jacking bolts 5 are slowly screwed simultaneously, or the two jacking bolts 5 are alternately screwed, so that the jacking bolt 5 slowly spirals downward. Since the tilting pad bearing housing 83 is fixed, the reaction force between the jacking bolt 5 and the tilting pad bearing housing 83 will cause the base 2 to be lifted, and the half-ring member 1, the adjustment block 3, and the shaft body fixedly connected to the adjustment block 3 are also lifted upward accordingly. Based on this transmission principle, this embodiment uses two jacking bolts 5 to lift the height of the shaft body 81 of the gas turbine equipment. At the same time, since the height that the shaft body needs to be lifted is very small, converting the linear up-and-down movement into the rotational movement of the jacking bolt 5 can precisely control the lifting height, avoiding the accident that the blades of the compressor and the casing are squeezed against each other due to excessive lifting amount, resulting in blade damage and equipment scrapping. The other structures and working principles of this embodiment are the same as those of Embodiment 2.

[0046] Embodiment 4:

[0047] As Figure 1 Or Figure 3 As shown, this embodiment discloses a maintenance device for the tilting pad bearing of a gas turbine equipment, including a half-ring member 1. The two ends of the half-ring member 1 have horizontal extension parts, and a jacking device for lifting the half-ring member 1 is provided on the extension parts. An adjustment block 3 that can slide along the half-ring member 1 is provided on the half-ring member 1, and a fastening bolt 4 is provided on the adjustment block 3. Among them, this embodiment further discloses that a chute is provided on the part of the half-ring member 1 where the adjustment block 3 slides. As a preferred solution, the cross-section of the chute is in a "T" shape. One end of the adjustment block 3 that mates with the chute is provided with a slider, and the slider can be engaged with the "T" - shaped groove. The design of the "T" - shaped cross-section facilitates the engagement of the adjustment block and prevents it from falling off, and enables the adjustment block 3 to move along the half-ring member 1 to a suitable position. Correspondingly, the slider is designed in a hook-tooth shape, and the opening width of the slider is smaller than the width of the upper part of the "T" - shaped cross-section of the half-ring member 1. Therefore, the adjustment block 3 can move on the half-ring member 1 without falling off. The other structures and working principles of this embodiment are the same as those of Embodiment 1.

[0048] Embodiment 5:

[0049] As Figure 1Or Figure 3 As shown, on the basis of the fourth embodiment, in order to facilitate the cooperation with different adjustment blocks 3, this embodiment further discloses the insertion ports 6 provided at both ends of the semi-ring member 1. The insertion ports 6 are the entrances and exits for the adjustment blocks 3 to access or remove from the semi-ring member 1. The position of the insertion port 6 is a narrowing structure, and its width is smaller than the width of the slider opening. When installing, the adjustment block 3 is sleeved into the semi-ring member 1 from this position, or disengaged from the semi-ring member 1 from this position. With the cooperation of the insertion ports 6, when this embodiment adapts to gas turbine equipment of different specifications, the number of adjustment blocks 3 can be increased or decreased according to actual needs, further improving the applicable range of this embodiment. Other structures and working principles of this embodiment are the same as those of the fourth embodiment.

[0050] In the specific content of the above specific implementation manners, the technical features can be combined arbitrarily without contradiction. For the sake of brevity of description, not all possible combinations of the above technical features are described. However, as long as the combinations of these technical features do not exist in contradiction, they should be considered as the scope described in this specification.

[0051] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A maintenance method for a tilting pad bearing of a gas turbine equipment, the gas turbine equipment having a rotor end face (82) and a tilting pad bearing housing (83), characterized in that, The maintenance method is implemented by a maintenance device, which includes a semi-ring member (1). Both ends of the semi-ring member (1) have horizontal extension parts, and a jacking device is provided on the extension parts. An adjusting block (3) capable of sliding along the semi-ring member (1) is provided on the semi-ring member (1). A fastening bolt (4) is provided on the adjusting block (3), and the adjusting block (3) is connected to a bolt blind hole provided on the rotor end face (82) through the fastening bolt (4). A chute is provided on the part of the semi-ring member (1) where the adjusting block (3) slides, and a slider cooperating with the chute is provided on the adjusting block (3). The cross-section of the chute is in a "T" shape. The number of sets of adjusting blocks (3) is multiple, each set includes multiple adjusting blocks (3), and different sets of adjusting blocks (3) have different thicknesses in the normal direction of their moving plane. The maintenance method includes the following steps: S1. Disassemble the upper casing of the gas turbine equipment and the upper half of the tilting pad bearing housing horizontally along the gas turbine equipment to expose the rotor end face (82) of the gas turbine equipment and the tilting pad bearing housing (83). S2. Select a corresponding set of adjusting blocks (3) and the fastening bolts (4) cooperating with the adjusting blocks (3) according to the distance between the tilting pad bearing housing (83) and the rotor end face (82). S3. Assemble the adjusting block (3) with the semi-ring member (1) so that the adjusting block (3) can slide along the semi-ring member (1). When the adjusting block (3) slides to be aligned with the bolt blind hole on the rotor end face, fix the adjusting block (3) to the rotor through the fastening bolt (4). S4. The horizontal extension parts at both ends of the semi-ring member (1) are in contact with the cross-section of the tilting pad bearing housing. S5. Slowly lift the semi-ring member (1) through the jacking device provided on the extension part, and drive the rotor in the gas turbine equipment to lift through the adjusting block (3). S6. Due to the lifting of the rotor, a gap is generated between the shaft extending from one end of the rotor and the tilting pad bearing, so that the tilting pad bearing can be taken out and installed through the gap without disassembling the entire gas turbine equipment.

2. The maintenance method of the tilting pad bearing of the gas turbine equipment according to claim 1, characterized in that, The extension part includes a base (2), and the base (2) is fixedly connected to both ends of the semi-ring member (1).

3. The maintenance method of the tilting pad bearing of the gas turbine equipment according to claim 1, characterized in that, The extension part includes a base (2), and the base (2) and the semi-ring member (1) are of an integral structure.

4. The maintenance method of the tilting pad bearing of the gas turbine equipment according to claim 2 or 3, characterized in that, The jacking device includes a threaded hole provided on the base (2) and a jacking bolt (5) passing through and cooperating with the threaded hole.

5. The maintenance method of the tilting pad bearing of the gas turbine equipment according to claim 1, characterized in that, Both ends of the semi-ring member (1) are provided with insertion openings (6) for the adjusting blocks (3) to access.

6. The maintenance method of the tilting pad bearing of the gas turbine equipment according to claim 1, characterized in that, The adjusting block (3) is provided with an oblong hole (7), and the fastening bolt (4) passes through the oblong hole (7) and is connected to the bolt blind hole provided on the rotor end face (82).

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