Turbine rotor disc shaft support

Abstract

The utility model relates to a steam turbine rotor disc shaft support which comprises a support assembly, a pair of wheel discs, a power system and a brake system. The power system is arranged on the support assembly and used for driving the rotor to rotate. The paired wheel disc is coaxially connected with one end of the rotor; the brake system is arranged on the support assembly and used for braking the wheel disc. According to the steam turbine rotor disc shaft support, the support assembly is used for supporting the rotor, the rotor is connected with the opposite wheel disc, the rotor is driven to rotate through the power system, and therefore the next last-stage blade to be disassembled and inspected is rotated to the disassembling and inspecting position; and the brake system is arranged on the bracket assembly to brake the wheel disc, so that the rotation of the rotor is further limited.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam turbines, in particular to a steam turbine rotor disc shaft support. BACKGROUND

[0002] As a prime mover, steam turbines can convert the heat energy of steam into mechanical energy. In order to increase the thermal efficiency of steam turbines, more and more power plants use half-speed machines with larger flow area, heavier blades and longer blades. The half-speed steam turbine requires a larger flow area, resulting in larger and longer length of the last stage blade, so the stress on the last stage blade is larger, and the maintenance of the last stage blade is also an important part of the steam turbine rotor maintenance.

[0003] In the related art, a plurality of last stage blades are sequentially detached from the rotor for inspection by using a disassembly and inspection tool. The disassembly and inspection tool includes a support, a motor and a roller, the roller is rotatably arranged on the support, and the support supports the rotor through the roller. When the current last stage blade at the disassembly and inspection position is detached, the motor drives the roller to rotate and in turn drives the rotor to rotate, so as to rotate the next last stage blade to be disassembled to the disassembly and inspection position. However, the disassembly of the last stage blade will cause the rotor to produce an unbalance, and as the number of disassembled last stage blades increases, when the unbalance is greater than the bearing moment of the support, the rotor will uncontrollably rotate, which not only easily damages the rotor, but also easily injures the on-site workers. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a steam turbine rotor disc shaft support to solve the problem that the rotor easily uncontrollably rotates during disassembly and inspection.

[0005] A steam turbine rotor disc shaft support, comprising:

[0006] a support assembly for supporting a rotor;

[0007] a power system arranged on the support assembly, the power system being configured to drive the rotor to rotate;

[0008] a pair of wheels arranged to be coaxially connected to one end of the rotor; and

[0009] a brake system arranged on the support assembly, the brake system being configured to brake the pair of wheels.

[0010] In one embodiment, the support assembly includes a first support and a second support, the first support is provided with a driving roller, the second support is provided with a driven roller, and the driving roller and the driven roller support two ends of the rotor, respectively.

[0011] The power system is used to drive the main roller to rotate, so that the main roller drives the rotor to rotate, and the rotor drives the driven roller to rotate.

[0012] In one of the embodiments, the power system comprises a power driving member and a reduction gear set, the power driving member is connected to the input end of the reduction gear set through a worm gear structure, and the output end of the reduction gear set is connected to the main roller.

[0013] In one of the embodiments, the output end of the reduction gear set comprises a transmission shaft and a first transmission gear sleeved on the transmission shaft.

[0014] The power system further comprises a roller transmission gear set engaged with the main roller, and the first transmission gear is engaged with the roller transmission gear set for transmission.

[0015] In one of the embodiments, the output end of the reduction gear set further comprises a second transmission gear sleeved on the transmission shaft, and the second transmission gear is engaged with the pair of wheel discs for transmission.

[0016] In one of the embodiments, the brake system comprises a brake driving member and a brake pad connected to the output end of the brake driving member, and the brake driving member can drive the brake pad to move to abut against the pair of wheel discs.

[0017] In one of the embodiments, the brake system comprises a jack, the output end of the brake driving member is connected to the jack, and the output end of the jack is connected to the brake pad.

[0018] In one of the embodiments, the brake system comprises a slidingly matched slide rail and a slide block, the length direction of the slide rail is parallel to the axial direction of the pair of wheel discs, and one of the slide rail and the slide block is connected to the support assembly, and the other is connected to the jack.

[0019] In one of the embodiments, the brake system further comprises a laser range finder, the laser range finder is arranged on one side of the pair of wheel discs along the axial direction thereof, and the laser range finder is used to detect the distance between the brake pad and the pair of wheel discs.

[0020] In one of the embodiments, the brake system is provided with two groups, and the two groups of brake systems are arranged on the two sides of the pair of wheel discs along the axial direction thereof respectively.

[0021] The steam turbine rotor disc shaft support supports the rotor by the support assembly, and the counter disc is connected on the rotor, the rotor is driven to rotate by the power system, so that the last stage blade to be disassembled and inspected is rotated to the disassembled and inspected position, and when the last stage blade is rotated to the disassembled and inspected position, the power system not only stops driving the rotor, but also brakes the counter disc by the brake system arranged on the support assembly, so that the rotation of the rotor is further limited. The steam turbine rotor disc shaft support provided by the application further limits the rotation of the rotor by arranging the brake system, improves the braking effect, and reduces the probability of hurting the on-site workers due to the uncontrollable rotation of the rotor. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A structural schematic diagram of the steam turbine rotor disc shaft support provided by the embodiment of the application.

[0023] Figure 2 A structural schematic diagram of the first support provided by the embodiment of the application, wherein the power system and the brake system are arranged on the first support.

[0024] Figure 3 A structural schematic diagram of the power system provided by the embodiment of the application from a first perspective.

[0025] Figure 4 A structural schematic diagram of the power system provided by the embodiment of the application from a second perspective.

[0026] Figure 5 A structural schematic diagram of the brake system provided by the embodiment of the application from a first perspective.

[0027] Figure 6 A structural schematic diagram of the brake system provided by the embodiment of the application from a second perspective.

[0028] In the drawings:

[0029] 100, rotor;

[0030] 200, first support; 210, driving roller;

[0031] 300, second support;

[0032] 400, counter disc;

[0033] 500, power system; 510, power driving part; 520, speed reduction gear set; 521, input end; 522, output end; 5221, transmission shaft; 5222, first transmission gear; 5223, second transmission gear; 530, roller transmission gear set; 540, power box body; 550, worm gear; 560, worm;

[0034] 600, brake system; 610, brake driving part; 620, brake pad; 630, jack; 640, sliding block; 650, laser range finder; 660, brake box; 670, rib plate. DETAILED DESCRIPTION

[0035] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners, which are different from those described herein, and it is understood that similar improvements can be made by those skilled in the art without departing from the spirit and scope of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0036] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] In addition, if the terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0038] In the present application, unless otherwise specifically defined and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the present application, unless specifically stated and limited otherwise, if there is a description of a first feature "on" or "under" a second feature, etc., it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "on", "above" and "over" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "set to" another element, it can be directly on the other element or there can be a mediating element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a mediating element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0041] The present application provides a steam turbine rotor disc shaft support, as shown in Figures 1 to 6 The steam turbine rotor disc shaft support comprises: a support assembly, a counter wheel disc 400, a power system 500 and a brake system 600, the support assembly is used to support the rotor 100; the power system 500 is arranged on the support assembly, and the power system 500 is used to drive the rotor 100 to rotate; the counter wheel disc 400 is used to be coaxially connected with one end of the rotor 100; and the brake system 600 is arranged on the support assembly, and the brake system 600 is used to brake the counter wheel disc 400.

[0042] The above steam turbine rotor disc shaft support uses the support assembly to support the rotor 100, and the counter wheel disc 400 is connected on the rotor 100, the power system 500 drives the rotor 100 to rotate, so as to rotate the next end-stage blade to be disassembled to a disassembly position, when the end-stage blade is rotated to the disassembly position, the power system 500 not only stops driving the rotor 100, but also limits the rotation of the counter wheel disc 400 through the brake system 600 arranged on the support assembly, so as to further limit the rotation of the rotor 100. The steam turbine rotor disc shaft support of the present application further limits the rotation of the rotor 100 by arranging the brake system 600, improves the braking effect, and reduces the probability of hurting the on-site workers due to the uncontrollable rotation of the rotor 100.

[0043] Specifically, as shown in Figure 1 and Figure 2 The counter wheel disc 400 is connected to the rotor 100 through a locking piece. The locking piece can be, but is not limited to, a screw, a bolt or a pin, etc.

[0044] Further, as shown in Figure 1 and Figure 2 , the support assembly comprises a first support 200 and a second support 300, the first support 200 is provided with a driving roller 210, the second support 300 is provided with a driven roller, the driving roller 210 and the driven roller support two ends of the rotor 100 respectively; the power system 500 is used to drive the driving roller 210 to rotate, so that the driving roller 210 drives the rotor 100 to rotate, and the rotor 100 drives the driven roller to rotate.

[0045] By setting the driving roller 210 on the first support 200 and the driven roller on the second support 300, the rotor 100 is supported and rolled. When the rotor 100 needs to be rotated, the power system 500 drives the driving roller 210 to rotate, thereby driving the rotor 100 to rotate. When the rotor 100 needs to be braked, the power system 500 does not provide power through braking, thereby braking the driving roller 210.

[0046] In this embodiment, the outer rings of the driving roller 210 and the driven roller are brass sleeves, the driving roller 210 and the driven roller are in contact with the rotor 100, the driving roller 210 drives the rotor 100 to rotate through friction, and the rotor 100 drives the driven roller to rotate through friction.

[0047] In other embodiments, first teeth can be provided on the driving roller 210 and the driven roller, and second teeth meshing with the first teeth can be provided on the rotor, so as to drive the rotor to rotate through the meshing of the teeth.

[0048] Specifically, the first support 200 and the second support 300 are arranged in the axial direction of the rotor 100.

[0049] Further, as shown in Figures 2 to 4 , the power system 500 comprises a power driving member 510 and a speed reduction gear set 520, the power driving member 510 is connected to the input end 521 of the speed reduction gear set 520 through a worm gear structure, and the output end 522 of the speed reduction gear set 520 is connected to the driving roller 210. By connecting the power driving member 510 to the input end 521 of the speed reduction gear set 520, the speed reduction gear set 520 is driven to rotate by the power driving member 510, and since the driving roller 210 is connected to the output end 522 of the speed reduction gear set 520, the driving roller 210 can be driven to rotate by the output end 522 of the speed reduction gear set 520, thereby driving the rotor 100 to rotate.

[0050] Specifically, the worm gear structure comprises a worm gear 550 and a worm 560 meshing with each other, in this embodiment, as shown in Figures 2 to 4As shown, the worm wheel 550 is connected to the output end of the power driving member 510, and the worm 560 is connected to the input end 521 of the speed reduction gear set 520. The worm wheel 550 is driven to rotate by the power driving member 510, which in turn drives the worm 560 and the input end 521 of the speed reduction gear set 520 to rotate. Moreover, the worm and worm wheel structure is adopted to connect the power driving member 510 and the input end 521 of the speed reduction gear set 520, and the worm and worm wheel structure has a self-locking function. As long as the power driving member 510 is controlled to stop power output, the speed reduction gear set 520 can be controlled to stop working.

[0051] Of course, in other embodiments, the worm 560 can be connected to the output end of the power driving member 510, and the worm wheel 550 can be connected to the input end 521 of the speed reduction gear set 520.

[0052] Specifically, as shown in Figures 2 to 4 The speed reduction gear set 520 includes a plurality of speed reduction gears arranged in sequence, and adjacent two speed reduction gears are engaged. The speed reduction gear at one edge position in the plurality of speed reduction gears is connected to the worm 560 as the input end 521 of the speed reduction gear set 520. The speed reduction gear at the other edge position in the plurality of speed reduction gears is connected to the output end 522 of the speed reduction gear set 520.

[0053] In the embodiment, as shown in Figures 2 to 4 The speed reduction gear set 520 includes three speed reduction gears, and in other embodiments, the number of speed reduction gears can be set according to actual operation needs.

[0054] Specifically, as shown in Figures 2 to 4 The output end 522 of the speed reduction gear set 520 includes a transmission shaft 5221 and a first transmission gear 5222 sleeved on the transmission shaft 5221. The power system 500 further includes a roller transmission gear set 530 engaged with the driving roller 210. The first transmission gear 5222 is engaged with the roller transmission gear set 530 for transmission, so that the transmission shaft 5221 drives the first transmission gear 5222 to rotate, the first transmission gear 5222 drives the roller transmission gear set 530 to rotate, and the roller transmission gear set 530 drives the driving roller 210 to rotate. The transmission shaft 5221 is connected to the speed reduction gear at the other edge position in the plurality of speed reduction gears. The transmission shaft 5221 is driven to rotate by the speed reduction gear, thereby driving the first transmission gear 5222 sleeved on the transmission shaft 5221 to rotate. Since the first transmission gear 5222 is engaged with the roller transmission gear set 530, and the roller transmission gear set 530 is engaged with the driving roller 210, the driving roller 210 can be driven to rotate by the rotation of the roller transmission gear set 530, and further driven to rotate by the rotation of the rotor 100.

[0055] More specifically, as shown in Figures 2 to 4As shown, the roller transmission gear set 530 is provided with n (n is a positive integer) roller transmission gears, and the n roller transmission gears are arranged in sequence, and adjacent two roller transmission gears are engaged.

[0056] More specifically, as shown, the driving roller 210 is provided with m (m is a positive integer), and n-m=1. Figures 2 to 4

[0057] More specifically, in this embodiment, three roller transmission gears are provided, and two driving rollers 210 are provided. By providing three roller transmission gears, the rotation directions of the two driving rollers 210 are adjusted to be consistent.

[0058] Specifically, the output end 522 of the speed reduction gear set 520 further comprises a second transmission gear 5223 sleeved on the transmission shaft 5221, and the second transmission gear 5223 is engaged with the counter wheel disc 400 to drive; so that the transmission shaft 5221 drives the second transmission gear 5223 to rotate, and the second transmission gear 5223 drives the counter wheel disc 400 to rotate. The transmission shaft 5221 is connected with the speed reduction gears at another edge position in the plurality of speed reduction gears, and the transmission shaft 5221 is driven to rotate by the speed reduction gears, so as to drive the second transmission gear 5223 sleeved on the transmission shaft 5221 to rotate. Because the second transmission gear 5223 is engaged with the counter wheel disc 400, the counter wheel disc 400 can be driven to rotate by the second transmission gear 5223, and then the rotor 100 is driven to rotate.

[0059] That is, the power system 500 of the present application provides two ways to drive the rotor 100 to rotate, one of which is to drive the rotor 100 to rotate by the power driving member 510, the transmission shaft 5221, the first transmission gear 5222, the roller transmission gear set 530 and the driving roller 210; the other is to drive the rotor 100 to rotate by the power driving member 510, the transmission shaft 5221, the second transmission gear 5223 and the counter wheel disc 400.

[0060] Therefore, the present application also has two braking modes, one of which is to limit the rotation of the driving roller 210 to limit the rotation of the rotor 100; the other is to limit the rotation of the counter wheel disc 400 to limit the rotation of the rotor 100.

[0061] It should be noted that the two ways to drive the rotor 100 to rotate and the two ways to brake the rotor 100 to rotate provided by the present application are matched with each other.

[0062] Specifically, as shown, Figures 2 to 4 ​As shown in the figure, the power system 500 further comprises a power box 540 connected to the first support 200, the power driving member 510, the speed reduction gear set 520, and the roller transmission gear set 530 are all arranged in the power box 540, the driving roller 210 is partially arranged in the power box 540 and partially arranged outside the power box 540 to support the rotor 100, the transmission shaft 5221 is partially arranged in the power box 540 and partially arranged outside the power box 540, and the second transmission gear 5223 is arranged on the area outside the power box 540.

[0063] Further, as shown in the figures, Figure 1 、 Figure 5 and Figure 6 , the brake system 600 comprises a brake driving member 610 and a brake pad 620 connected to the output end of the brake driving member 610, the brake driving member 610 can drive the brake pad 620 to move to abut against the pair of wheel discs 400. By arranging the brake pad 620, the brake driving member 610 drives the brake pad 620 to move to abut against the pair of wheel discs 400, thereby limiting the rotation of the pair of wheel discs 400 and the rotation of the rotor 100.

[0064] Specifically, as shown in the figures, Figure 1 、 Figure 5 and Figure 6 , the brake system 600 comprises a jack 630, the output end of the brake driving member 610 is connected to the jack 630, and the output end of the jack 630 is connected to the brake pad 620. The brake driving member 610 is connected to the brake pad 620 through the jack 630, the brake driving member 610 drives the jack 630 and the brake pad 620 to move to a preset position, and the brake pad 620 is driven by the jack 630 to be pressurized to abut against the pair of wheel discs 400, thereby enhancing the abutting force of the brake pad 620 against the pair of wheel discs 400 and improving the braking effect.

[0065] More specifically, the output end of the brake driving member 610 is connected to the jack 630 through a worm gear structure.

[0066] Specifically, as shown in the figures, Figure 1 、 Figure 5 and Figure 6 , the brake system 600 comprises a sliding rail and a sliding block 640 in sliding fit, the length direction of the sliding rail is parallel to the axial direction of the pair of wheel discs 400, one of the sliding rail and the sliding block 640 is connected to the first support 200 of the support assembly, and the other is connected to the jack 630. By arranging the sliding rail and the sliding block 640, the sliding rail and the sliding block 640 are in sliding fit, thereby limiting the movement direction of the jack 630 and the movement direction of the brake pad 620 (i.e. the direction in which the brake pad 620 abuts against the pair of wheel discs 400).

[0067] In this embodiment, as shown in the figures,Figure 1 、 Figure 5 and Figure 6 The slide rail is connected to the first support 200, and the slide block 640 is connected to the jack 630. In other embodiments, the slide block 640 can be connected to the first support 200, and the slide rail can be connected to the jack 630.

[0068] Specifically, as shown in Figure 1 、 Figure 5 and Figure 6 The brake system 600 further comprises a brake housing 660, the wheel disc 400 can partially extend into the brake housing 660, and the brake housing 660 is connected to the first support 200, and the brake driving member 610, the brake pad 620, the jack 630, the slide rail and the slide block 640 are all arranged in the brake housing 660.

[0069] More specifically, as shown in Figure 1 、 Figure 5 and Figure 6 The brake system 600 further comprises a rib plate 670 arranged in the brake housing 660, and the brake driving member 610 and the slide rail are arranged on the rib plate 670.

[0070] Specifically, as shown in Figure 1 、 Figure 5 and Figure 6 The brake system 600 further comprises a laser range finder 650 arranged on one side of the wheel disc 400 along the axial direction of the wheel disc 400, and the laser range finder 650 is used to detect the distance between the brake pad 620 and the wheel disc 400. By arranging the laser range finder 650, the distance between the brake pad 620 and the wheel disc 400 is detected by the laser range finder 650, so that the brake precision is accurately controlled.

[0071] More specifically, as shown in Figure 1 、 Figure 5 and Figure 6 In this embodiment, the laser range finder 650 and the brake pad 620 are arranged in a radial direction of the wheel disc 400. In other embodiments, the arrangement position of the laser range finder 650 is not limited, as long as the distance between the brake pad 620 and the wheel disc 400 can be detected.

[0072] Specifically, as shown in Figure 1 、 Figure 5 and Figure 6 Figure 1 Figure 5 Figure 6As shown, the brake system 600 is provided with two groups, and the two groups of brake system 600 are respectively arranged on both sides of the pair of wheel discs 400 along the axial direction of the pair of wheel discs 400. By arranging one group of brake system 600 on each side of the pair of wheel discs 400, when the rotor 100 needs to be braked, the two groups of brake system 600 can be braked according to the operation needs, for example, only one group can work to brake, or both groups of brake system 600 can work to brake.

[0073] In summary, because the power system 500 of the present application provides two ways to drive the rotation of the rotor 100, the present application also has two braking modes, one of which is to limit the rotation of the rotor 100 by limiting the rotation of the driving roller 210, that is, the power output of the power driving member 510 can limit the rotation of the driving roller 210; the other is to limit the rotation of the rotor 100 by limiting the rotation of the pair of wheel discs 400, that is, by driving the brake pad 620 to abut against the pair of wheel discs 400 through the brake driving member 610 and the jack 630, the pair of wheel discs 400 can be braked by abutting against the pair of wheel discs 400, thereby limiting the rotation of the pair of wheel discs 400.

[0074] Further, the disc driving process of the rotor 100 is controlled by the PCL control system, which is provided with four modes of forward disc driving, reverse disc driving, forward point driving, and reverse point driving, and the speed of disc driving is adjusted by setting the rotation speed of the power driving member 510. A stop button is provided, and when the stop button is pressed, the power driving member 510 stops disc driving, and the brake system 600 is protected.

[0075] The installation steps of the steam turbine rotor disc shaft support provided by the present application are as follows:

[0076] The first support 200 is hoisted to the maintenance site;

[0077] The power driving member 510 of the power system 500 is installed on the power box body 540, the fixed bearing of the rotation shaft of the power driving member 510 is installed, the worm 560 is matched with the output end 522 of the speed reduction gear set 520, the worm 560 is matched and installed with the worm gear 550 on the power driving member 510, and the speed reduction gears of the speed reduction gear set 520 are sequentially installed;

[0078] The roller transmission gear set 530 and the driving roller 210 are installed, the driving roller 210 is meshed and matched with the roller transmission gear of the roller transmission gear set 530, the transmission shaft 5221, the first transmission gear 5222, and the second transmission gear 5223 are installed, and the first transmission gear 5222 is meshed with the roller transmission gear set 530;

[0079] The brake box 660 is connected to the first support 200, and the rib plate 670 is arranged in the brake box 660, the brake driving part 610 is installed at the rib plate 670, the sliding block 640, the sliding rail and the jack 630 are sequentially installed, and the brake pad 620 is installed at the output end of the jack 630, and the hydraulic oil of the jack 630 and the control system thereof are connected;

[0080] The second support 300 is hoisted to the maintenance site and is adjusted according to the position of the driving wheel;

[0081] The power supply, signal line, oil pipe and other connecting equipment are connected;

[0082] The rotor 100 is hoisted to the turbine rotor disc shaft support, the counter disc 400 is installed on the rotor 100, and the counter disc 400 is engaged with the second transmission gear 5223;

[0083] The brake system 600 is started, the laser range finder 650 measures the position of the brake pad 620, the brake driving part 610 of the brake system 600 is adjusted to make the brake pad 620 be at a preset position, and the jack 630 pressurizes the brake pad 620 to the counter disc 400, so that the rotor 100 is in a stationary state.

[0084] The application also provides a rotation process of the rotor 100:

[0085] The rotation rate of the power driving part 510 is adjusted, and the “forward rotation” “reverse rotation” “forward point driving” “reverse point driving” button is pressed;

[0086] The jack 630 is depressurized, the two brake pads 620 of the two brake systems 600 no longer press the counter disc 400, and the jack 630 limits the rotor 100 in the axial direction of the rotor 100;

[0087] The power driving part 510 starts to rotate, the torque is reduced in speed and amplified in torque through the speed reduction gear set 520, and the torque is transmitted to the first transmission gear 5222 and the second transmission gear 5223 through the transmission shaft 5221;

[0088] The roller transmission gear set 530 changes the direction through the three groups of roller transmission gears, drives the two driving rollers 210 to rotate in the same direction, and then drives the rotor 100 to rotate through the friction force;

[0089] The second transmission gear 5223 is engaged with the counter disc 400, and the rotor 100 is driven to rotate through the shearing force;

[0090] After rotation, the stop key is pressed, the power driving part 510 stops rotating, and the jack 630 injects pressure oil to brake the rotor 100.

[0091] Compared with the prior art, the steam turbine rotor disc shaft support has the following beneficial effects:

[0092] 1. The worm gear structure is designed, so that the driving roller 210 will not rotate in the case that the power driving part 510 is not powered to rotate.

[0093] 2. The first transmission gear 5222 and the second transmission gear 5223 are used to output torque, so that the driving roller 210 and the rotor 100 will not slide during rotation, and the rotor 100 cannot rotate or the rotor 100 unexpectedly slides.

[0094] 3. The brake system 600 is used to limit the axial and radial positions of the rotor 100, so that the high requirements of the rotor 100 during disassembly and inspection are met.

[0095] 4. The brake pad 620 is combined with the laser range finder 650, so that the high requirements of the position of the rotor 100 when falling are reduced.

[0096] The steam turbine rotor disc shaft support is applied to a power plant.

[0097] 1. During the disassembly and inspection of the last stage blades of the rotor 100, the rotor 100 needs to rotate, and the disassembly of the blades will cause dynamic imbalance. If the rotor 100 rotates unexpectedly, it will pose a serious threat to the workers and equipment, and the safety of the workers and equipment is ensured.

[0098] 2. The rotor 100 needs to rotate continuously during cleaning, non-destructive testing, and blade disassembly and replacement.

[0099] 3. Individual high-precision non-destructive testing requires constant rotation speed and maintains the axial position of the rotor 100. This patent satisfies the axial movement of the rotor 100.

[0100] 4. The finishing of the rotor 100 girth teeth and steam seal teeth requires that the rotor 100 does not move axially and radially.

[0101] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0102] The above embodiments only express several implementation manners of the application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which are within the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A steam turbine rotor disk shaft support, characterized by, The steam turbine rotor disc shaft support comprises: a support assembly for supporting a rotor (100); a power system (500) provided on the support assembly, the power system (500) being configured to drive the rotor (100) to rotate; a pair of wheel discs (400) configured to be coaxially connected to one end of the rotor (100); and a brake system (600) provided on the support assembly, the brake system (600) being configured to brake the pair of wheel discs (400).

2. The turbine rotor disc axle support of claim 1, wherein, The support assembly comprises a first support (200) and a second support (300), the first support (200) is provided with a driving roller (210), and the second support (300) is provided with a driven roller, the driving roller (210) and the driven roller are configured to support two ends of the rotor (100) respectively. The power system (500) is configured to drive the driving roller (210) to rotate, so that the driving roller (210) drives the rotor (100) to rotate, and the rotor (100) drives the driven roller to rotate.

3. The turbine rotor disc axle support of claim 2, wherein, The power system (500) comprises a power driving member (510) and a speed reduction gear set (520), the power driving member (510) is connected to an input end (521) of the speed reduction gear set (520) through a worm gear structure, and an output end (522) of the speed reduction gear set (520) is connected to the driving roller (210).

4. The turbine rotor disc axle support of claim 3, wherein, The output end (522) of the speed reduction gear set (520) comprises a transmission shaft (5221) and a first transmission gear (5222) sleeved on the transmission shaft (5221). The power system (500) further comprises a roller transmission gear set (530) engaged with the driving roller (210), and the first transmission gear (5222) is engaged with the roller transmission gear set (530) for transmission.

5. The turbine rotor disc axle support of claim 4, wherein, The output end (522) of the speed reduction gear set (520) further comprises a second transmission gear (5223) sleeved on the transmission shaft (5221), and the second transmission gear (5223) is engaged with the pair of wheel discs (400) for transmission.

6. The turbine rotor disk shaft support of claim 1, wherein, The brake system (600) comprises a brake driving member (610) and a brake pad (620) connected to an output end of the brake driving member (610), and the brake driving member (610) is configured to drive the brake pad (620) to move so as to abut against the pair of wheel discs (400).

7. The turbine rotor disc axle support of claim 6, wherein, The brake system (600) comprises a jack (630), an output end of the brake driving member (610) is connected to the jack (630), and an output end of the jack (630) is connected to the brake pad (620).

8. The turbine rotor disc axle support of claim 7, wherein, The brake system (600) comprises a sliding rail and a sliding block (640) in sliding fit, a length direction of the sliding rail is parallel to an axial direction of the pair of wheel discs (400), one of the sliding rail and the sliding block (640) is connected to the support assembly, and the other is connected to the jack (630).

9. The turbine rotor disk shaft support of claim 6, wherein, The brake system (600) further comprises a laser range finder (650) arranged on one side of the pair of wheel discs (400) along the axial direction of the pair of wheel discs (400), and the laser range finder (650) is configured to detect the distance between the brake pad (620) and the pair of wheel discs (400).

10. A turbine rotor disc axle support according to any of claims 6-9, characterised in that The brake system (600) is provided in two groups, and the two groups of brake systems (600) are arranged on two sides of the pair of wheel discs (400) along the axial direction of the pair of wheel discs (400).

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