Low-pressure rotor support for steam turbine with buffer structure

Abstract

This utility model provides a low-pressure rotor support for steam turbines with a buffer structure, belonging to the technical field of motor maintenance equipment. It includes: a base, a housing, lifting lugs, a rotating shaft, a rotating drum, a fixed base, a frame, shaft rollers, a winding drum, and a buffer belt. A housing is installed on the upper end of the base, with a placement groove along the upper edge of the housing and an open opening on the upper side of the housing. When the low-pressure rotor is placed on the support, the buffer belt laid on the surface of the rotating drum can contact the rotating shaft of the downward-placed low-pressure rotor. The rotation of the rotating drum provides buffering. Under the downward pressure of the low-pressure rotor's weight, the rotating shaft presses the buffer belt downward into the gap between the two sets of rotating drums, causing the buffer belt to wrap around the outer end of the low-pressure rotor's rotating shaft and engage with the placement groove in the housing. This not only increases the friction with the rotating shaft, making the low-pressure rotor more stable and less prone to rotating with the rotating drum during maintenance, thus making maintenance safer, but also allows the rotating bolts to contact the outer side of the shaft rollers, fixing the shaft rollers and consequently the winding drum.

Description

Technical Field

[0001] This utility model relates to the field of motor maintenance equipment technology, and in particular to a low-pressure rotor support for steam turbines with a buffer structure. Background Technology

[0002] The low-pressure rotor of a steam turbine is an important component of the steam turbine. Its function is to convert the energy of steam into mechanical energy, thereby driving power generation equipment. Specifically, when steam enters the low-pressure rotor of the steam turbine, it will drive the rotor to rotate, thereby driving the generator or other mechanical equipment to operate. During the process, the pressure and temperature of the steam will gradually decrease, while the mechanical energy will gradually increase, ultimately realizing the energy conversion.

[0003] During the inspection and maintenance of the low-pressure rotor of the steam turbine, the rotor needs to be supported and parked on a special bracket to facilitate inspection and maintenance.

[0004] In actual use, the existing support system has been found to have the following shortcomings:

[0005] The existing support provides a limit and buffer by rotating the drum to cushion the rotor when it is placed on it. However, since the rotor shaft is mounted between two sets of drums and the surfaces of the rotor shaft and the two sets of drums are relatively smooth, the friction between them is small. This makes the low-pressure rotor unstable and prone to rotating with the drums during maintenance, which affects the safety of maintenance.

[0006] Furthermore, when the low-pressure rotor is placed on the support, the two sets of rotating drums rotate with the rotor's shaft, causing the downward-placed low-pressure rotor to rotate as well, resulting in a large deflection of the low-pressure rotor, which makes it easy for the low-pressure rotor to rotate when placed on the support.

[0007] Therefore, this application provides a low-pressure rotor support for steam turbines with a buffer structure to meet the requirements. Utility Model Content

[0008] The purpose of this utility model is to solve the problems existing in the above-mentioned background technology, and to propose a low-pressure rotor support for steam turbines with a buffer structure.

[0009] The technical problem to be solved by this utility model is to provide a low-pressure rotor support for steam turbines with a buffer structure to solve the problems of existing low-pressure rotor supports for steam turbines with buffer structures.

[0010] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0011] A low-pressure rotor support for a steam turbine with a buffer structure includes: a base, a casing, lifting lugs, a rotating shaft, a rotating drum, a fixed seat, a frame, shaft rollers, a winding drum, and a buffer belt. A casing is mounted on the upper end of the base. A placement groove is formed at the upper edge of the casing. An opening is formed at the upper side of the casing. Lifting lugs are mounted at both the front and rear ends of the casing. A rotating drum is mounted inside the casing via a rotating shaft. A fixed seat is welded to the side of the casing. A frame is welded to the side of the fixed seat. Shaft rollers are mounted on the inner side of the frame. A winding drum is mounted on the outer end of the shaft rollers. A buffer belt is wound around the surface of the winding drum.

[0012] Preferably, there are two sets of rotating shafts and rotating drums, located on the left and right sides inside the chassis, respectively, and the rotating drums are movably connected to the chassis via the rotating shafts.

[0013] Preferably, the rotating drum is located at the upper inner end of the chassis, and extends outward to the outer end of the chassis.

[0014] Preferably, the fixed base, frame, shaft roller and take-up drum are provided in two sets, and the two sets of fixed base, frame, shaft roller and take-up drum are mirror-symmetrically located at the left and right ends of the machine box respectively.

[0015] Preferably, the fixing seat is L-shaped and extends outward to the outer end of the side of the machine housing, and the winding drum is movably connected to the frame through the shaft roller.

[0016] Preferably, the opening is rectangular, and the chassis has two sets of openings, which are located on the upper left and right sides of the chassis, respectively.

[0017] Preferably, the buffer strip on the take-up drum at one end of the chassis passes through the opening, is laid on the two sets of rotating drums, and then passes outward through the opening and is wound onto the take-up drum at the other end of the chassis.

[0018] Preferably, the buffer strip is made of rubber.

[0019] Preferably, a support plate is fixedly connected to the front of the frame, and a bolt is provided through the side of the support plate away from the shaft roller.

[0020] Compared with the prior art, this utility model has at least the following beneficial effects:

[0021] 1. When placing the low-pressure rotor on the support, the buffer strip laid on the surface of the drum can contact the shaft of the low-pressure rotor placed downwards. The rotation of the drum can provide buffering. After being pressed down by the weight of the low-pressure rotor, the shaft will press the buffer strip downwards into the gap between the two sets of drums, so that the buffer strip wraps around the outer end of the shaft of the low-pressure rotor and is stuck into the placement slot of the machine box. This not only increases the friction with the shaft, making the low-pressure rotor more stable and less likely to rotate with the drum during maintenance, making maintenance safer, but also allows the rotating bolt to contact the outer side of the shaft roller to fix the shaft roller, thereby fixing the winding drum.

[0022] 2. When the rotating shaft presses the buffer belt downward into the gap between the two sets of rotating drums, the two sets of rotating drums can be fully mobilized as the buffer belt moves. The buffer belt can also pull the winding drums at both ends outward to rotate, thus providing buffering when moving downward. This can reduce the rotation speed of the rotating drum when the shaft of the low-pressure rotor is placed, and reduce the deflection and slippage of the low-pressure rotor, thus making the low-pressure rotor more stable when placed on the support. Attached Figure Description

[0023] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0026] Figure 3 This is a schematic diagram of the specific connection structure between the fixed base and the frame of this utility model;

[0027] Figure 4 This is a schematic diagram illustrating the use of this utility model.

[0028] [Figure Labels]

[0029] 1-Base; 2-Chassis; 3-Lifting lug; 4-Spindle; 5-Rotating drum; 6-Fixed seat; 7-Frame; 701-Support plate; 702-Bolt; 8-Shaft roller; 9-Take-up drum; 10-Buffer belt; 201-Placement groove; 202-Opening.

[0030] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 4 The present invention provides a low-pressure rotor support for a steam turbine with a buffer structure, comprising: a base 1, a housing 2, lifting lugs 3, a rotating shaft 4, a rotating drum 5, a fixed seat 6, a frame 7, a shaft roller 8, a winding drum 9, and a buffer belt 10. The housing 2 is mounted on the upper end of the base 1. A placement groove 201 is provided at the upper edge of the housing 2. An opening 202 is provided at the upper side of the housing 2. Lifting lugs 3 are mounted at the front and rear ends of the housing 2. The rotating drum 5 is mounted inside the housing 2 via the rotating shaft 4. A fixed seat 6 is welded to the side of the housing 2. A frame 7 is welded to the side of the fixed seat 6. A shaft roller 8 is mounted on the inner side of the frame 7. A winding drum 9 is mounted on the outer end of the shaft roller 8. A buffer belt 10 is wound around the surface of the winding drum 9.

[0032] In this embodiment, there are two sets of rotating shafts 4 and rotating drums 5, located on the left and right sides inside the housing 2 respectively. The rotating drums 5 are movably connected to the housing 2 through the rotating shafts 4. When the rotating shaft of the low-pressure rotor is placed on the housing 2, the rotating drums 5 can rotate, so that the rotating shaft of the low-pressure rotor is mounted inward between the two sets of rotating drums 5.

[0033] In this embodiment, the rotating drum 5 is located at the upper inner side of the housing 2, and the rotating drum 5 extends outward to the outer end of the housing 2. The rotating drum 5 at the outer end of the housing 2 can contact the shaft of the downward-placed low-pressure rotor. The rotation can buffer the contact and reduce hard contact.

[0034] In this embodiment, there are two sets of fixed base 6, frame 7, shaft roller 8 and take-up drum 9, and the two sets of fixed base 6, frame 7, shaft roller 8 and take-up drum 9 are mirror-symmetrically located at the left and right ends of the machine box 2 respectively.

[0035] In this embodiment, the fixing seat 6 is L-shaped and extends outward to the outer end of the side of the housing 2. The winding drum 9 is movably connected to the frame 7 through the shaft roller 8, which can provide moving space for the winding drum 9 and the buffer belt 10.

[0036] In this embodiment, the opening 202 is rectangular, and the chassis 2 is provided with two sets of openings 202, which are located on the upper left and right sides of the chassis 2 respectively.

[0037] In this embodiment, the buffer strip 10 on the take-up drum 9 at one end of the housing 2 passes through the opening 202 and is laid on the two sets of rotating drums 5. It then passes outward through the opening 202 and is wound onto the take-up drum 9 at the other end of the housing 2. The buffer strip 10 laid on the surface of the rotating drum 5 can contact the shaft of the low-pressure rotor placed downward. The rotation of the rotating drum 5 can provide buffering. After being pressed down by the gravity of the low-pressure rotor, the rotating shaft presses the buffer strip 10 downward into the gap between the two sets of rotating drums 5. This allows the buffer strip 10 to wrap around the outer end of the shaft of the low-pressure rotor and be inserted into the placement groove 201 of the housing 2. This not only increases the friction with the shaft, making the low-pressure rotor more stable when placed, but also makes it less likely to rotate with the rotating drum 5 during maintenance, making maintenance safer.

[0038] In this embodiment, the buffer strip 10 is made of rubber. The buffer strip 10 made of rubber has a certain degree of softness and strong toughness, so that it can deform as it contacts the shaft of the low-pressure rotor.

Claims

1. A low-pressure rotor support for a steam turbine with a buffer structure, characterized in that, include: The base (1), housing (2), lifting lugs (3), rotating shaft (4), rotating drum (5), fixed seat (6), frame (7), shaft roller (8), take-up drum (9) and buffer belt (10) are provided. The housing (2) is installed on the upper end of the base (1). A placement groove (201) is opened at the upper edge of the housing (2). An opening (202) is opened at the upper side of the housing (2). Lifting lugs (3) are installed at the front and rear ends of the housing (2). A rotating drum (5) is installed inside the housing (2) through the rotating shaft (4). A fixed seat (6) is welded to the side of the housing (2). A frame (7) is welded to the side of the fixed seat (6). A shaft roller (8) is installed on the inner side of the frame (7). A take-up drum (9) is installed at the outer end of the shaft roller (8). A buffer belt (10) is wound on the surface of the take-up drum (9).

2. The low-pressure rotor support for a steam turbine with a buffer structure according to claim 1, characterized in that: Two sets of rotating shafts (4) and rotating cylinders (5) are provided, located on the left and right sides inside the chassis (2) respectively, and the rotating cylinders (5) are movably connected to the chassis (2) through the rotating shafts (4).

3. The low-pressure rotor support for a steam turbine with a buffer structure according to claim 1, characterized in that: The rotating drum (5) is located at the upper inner side of the chassis (2), and the rotating drum (5) extends outward to the outer end of the chassis (2).

4. The low-pressure rotor support for a steam turbine with a buffer structure according to claim 1, characterized in that: The fixed seat (6), frame (7), shaft roller (8) and take-up drum (9) are provided in two sets, and the two sets of fixed seats (6), frame (7), shaft roller (8) and take-up drum (9) are mirror-symmetrically located at the left and right ends of the machine box (2).

5. The low-pressure rotor support for a steam turbine with a buffer structure according to claim 1, characterized in that: The fixed seat (6) is L-shaped and extends outward to the outer end of the side of the machine housing (2). The winding drum (9) is movably connected to the frame (7) through the shaft roller (8).

6. The low-pressure rotor support for a steam turbine with a buffer structure according to claim 1, characterized in that: The opening (202) is rectangular, and the chassis (2) is provided with two sets of openings (202), which are located on the upper left and right sides of the chassis (2).

7. The low-pressure rotor support for a steam turbine with a buffer structure according to claim 1, characterized in that: The buffer strip (10) on the take-up drum (9) at one end of the chassis (2) passes through the opening (202) and is laid on the two sets of rotating drums (5), then passes outward through the opening (202) and is wound onto the take-up drum (9) at the other end of the chassis (2).

8. The low-pressure rotor support for a steam turbine with a buffer structure according to claim 1, characterized in that: The buffer strip (10) is made of rubber.

9. The low-pressure rotor support for a steam turbine with a buffer structure according to claim 1, characterized in that: A support plate (701) is fixedly connected to the front of the frame (7), and a bolt (702) is provided through the side of the support plate (701) away from the shaft roller (8).

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