Supporting device

Abstract

The utility model relates to the technical field of steam turbines, and discloses a supporting device, which comprises a supporting rod, a rotating shaft, a rotating shaft and a rotating shaft, the sliding rod is slidably arranged on the supporting rod in a sleeving mode, and the top of the sliding rod is connected with the rotating shaft; one end of the elastic piece is fixedly connected with the bottom of the supporting rod, the other end of the elastic piece is fixedly connected with the bottom of the sliding rod, and the elastic piece elastically supports the rotor through the sliding rod. According to the supporting device provided by the utility model, the rotor is elastically supported through the elastic piece and the sliding rod, so that when the rotor vibrates, a buffering and damping effect is generated on the rotor, and the fault rate of the rotor is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbines, in particular to a supporting device. Background Art

[0002] A thermal power plant is a factory that uses combustibles (such as coal) as fuel to produce electricity. When combustibles are burned, they heat water to generate steam. The steam pressure is used to drive the steam turbine to rotate, converting thermal energy into mechanical energy. At the same time, the steam turbine drives the generator to rotate, converting mechanical energy into electrical energy. At present, the steam turbine rotors of most thermal power plants are affected by various external forces or equipment abnormalities during operation, resulting in micron-level vibrations, which are still relatively large vibrations for steam turbine rotors, which can easily increase the failure rate of the rotor and affect the stable operation of the equipment. Utility Model Content

[0003] In view of this, the utility model provides a supporting device to solve the problem that after the rotor is affected by external force or equipment abnormality and generates vibration, it is easy to cause its failure rate to increase, thereby affecting the stable operation of the equipment.

[0004] The utility model provides a supporting device for supporting a rotor, the supporting device comprising:

[0005] A support rod is extended along the gravity direction and is arranged below the rotating shaft of the rotor;

[0006] A sliding rod is slidably sleeved on the supporting rod, and the top of the sliding rod is connected to the rotating shaft;

[0007] The elastic member has one end fixedly connected to the bottom of the support rod and the other end fixedly connected to the bottom of the sliding rod. The elastic member forms elastic support for the rotor through the sliding rod.

[0008] Beneficial effect: The elastic member and the sliding rod form an elastic support for the rotor, so as to provide a buffering and vibration reduction effect on the rotor when it vibrates, thereby reducing the failure rate of the rotor.

[0009] In an optional embodiment, a first mounting seat is provided between the sliding rod and the rotating shaft, the top of the sliding rod is connected to the first mounting seat, a mounting hole is provided on the first mounting seat, and the rotating shaft is rotatably connected to the mounting hole.

[0010] In an optional embodiment, the number of sliding rods includes at least four, and the number of support rods is the same as the number of sliding rods; at least two sliding rods are respectively arranged at both ends of the rotating shaft, and a first connecting plate is also arranged between the sliding rod and the first mounting seat, and the top of the first connecting plate is fixedly connected to the bottom of the first mounting seat, and the two ends of the first connecting plate in the length direction are respectively hinged to at least one sliding rod.

[0011] In an optional embodiment, at least one second connecting plate is further arranged below the first connecting plate, the length direction of the second connecting plate is parallel to the length direction of the first connecting plate, one end of the second connecting plate along its length direction is hinged to a sliding rod, and the other end is hinged to another sliding rod.

[0012] Beneficial effect: By arranging at least one second connecting plate below the first connecting plate, the connection stability between the sliding rod and the first connecting plate can be enhanced.

[0013] In an optional embodiment, the elastic member includes a spring, which is sleeved on the outer peripheral side of the support rod, the top of the spring is fixedly connected to the bottom of the sliding rod, and the bottom of the spring is fixedly connected to the bottom of the support rod.

[0014] In an optional embodiment, the supporting device also includes a base, which is located below the supporting rod and fixedly connected to the bottom of the supporting rod; at least two lifting devices are also arranged between the base and the rotating shaft, and the plurality of lifting devices are spaced apart along an axial direction parallel to the rotating shaft, and the lifting devices have a first state in which they are connected to the rotating shaft to drive the rotor to move up and down, and a second state in which they are detached from the rotating shaft.

[0015] Beneficial effects: When the lifting device is in the first state, the rotor is driven to rise and fall by the lifting device to facilitate maintenance and repair of the rotor, ensure stability and safety during the repair process, and reduce the difficulty and time of the repair process; when the lifting device is in the second state, the lifting device does not contact the rotor, thereby not affecting the elastic supporting effect of the elastic part on the rotor.

[0016] In an optional embodiment, the lifting device includes a second mounting seat and two X-shaped hinged support rods, the tops of the two support rods are respectively slidably hingedly connected to the bottom of the second mounting seat, and when the lifting device is in a first state, the side of the second mounting seat facing away from the support rod is suitable for forming a support limit for the rotating shaft, and the height of the second mounting seat is changed by changing the angle between the two support rods.

[0017] Beneficial effect: By adjusting the angle between the two support rods, the height of the second mounting seat can be adjusted, and the rotor can be driven to rise and fall through the second mounting seat.

[0018] In an optional embodiment, the lifting device also includes a threaded rod rotatably connected to the inside of the base, and the outer peripheral wall of the threaded rod is provided with a first threaded portion and a second threaded portion with opposite spiral directions; the bottom of one of the support rods is threadedly matched with the first threaded portion, and the bottom of the other support rod is threadedly matched with the second threaded portion, and the threaded rod rotates around its own axis to drive the bottoms of the two support rods to move in opposite directions.

[0019] Beneficial effect: By rotating the threaded rod, the bottoms of the two support rods can be moved synchronously in opposite directions, thereby ensuring that the second mounting seat can stably perform lifting and lowering actions.

[0020] In an optional embodiment, a motor is fixedly connected to the base, and an output shaft of the motor is drivingly connected to the threaded rod.

[0021] In an optional embodiment, a support seat is fixedly connected to the side of the second mounting seat facing away from the support rod, and a groove is formed on the support seat corresponding to the rotating shaft. A partial area of ​​the rotating shaft falls in the groove, so that the support seat forms a support limit for the rotating shaft.

[0022] Beneficial effect: The support seat forms a support limit for the rotating shaft through the groove, which is beneficial to improving the stability and reliability of the support seat's support limit for the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a front view of the support device of the utility model;

[0025] Figure 2 It is a side view of the support device of the utility model;

[0026] Figure 3 It is a schematic diagram of the lifting device of the utility model;

[0027] Figure 4 It is a top view of the connection and cooperation between the first connecting plate and the sliding rod of the utility model;

[0028] Figure 5 It is a schematic diagram of the connection and cooperation between the support rod and the sliding rod of the utility model.

[0029] Description of reference numerals:

[0030] 1. Base; 2. Support rod; 3. Sliding rod; 41. First connecting plate; 42. Second connecting plate; 5. Elastic member; 6. First mounting seat; 7. Rotating shaft; 8. Threaded rod; 9. Bushing; 10. Support rod; 11. Second mounting seat; 13. Synchronous pulley; 14. Synchronous belt; 15. Motor. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] At present, most steam turbine rotors are affected by various external forces or equipment abnormalities during operation, causing the rotor to vibrate at the micron level. However, this level of vibration is still considered a large vibration for the rotor, which can easily lead to an increase in the rotor failure rate and affect the stable operation of the equipment. In addition, since the rotor structure is large, in order to maintain and repair it, the operation of disassembly or installation is cumbersome and costly, and it may also cause unsafe incidents such as injuries to maintenance personnel.

[0036] Combine the following Figures 1 to 5 , describing an embodiment of the utility model.

[0037] According to an embodiment of the utility model, a supporting device is provided for supporting a rotor, the supporting device comprising:

[0038] A support rod 2 is extended along the gravity direction and is arranged below the rotating shaft 7 of the rotor;

[0039] A sliding rod 3 is slidably sleeved on the support rod 2, and the top of the sliding rod 3 is connected to the rotating shaft 7;

[0040] The elastic member 5 has one end fixedly connected to the bottom of the support rod 2 and the other end fixedly connected to the bottom of the sliding rod 3 . The elastic member 5 forms an elastic support for the rotor through the sliding rod 3 .

[0041] The supporting device provided in this embodiment forms elastic support for the rotor through the elastic member 5 and the sliding rod 3, so as to provide a buffering and vibration reduction effect on the rotor when the rotor vibrates, thereby reducing the failure rate of the rotor.

[0042] Specifically, the rotating shaft 7 is arranged in the horizontal direction, and the support rods 2 are correspondingly arranged below the two ends of the rotating shaft 7 along the axial direction thereof. When the rotor vibrates, the rotating shaft 7 tilts and drives the sliding rod 3 to produce relative displacement relative to the support rod 2. At this time, the elastic member 5 is compressed, thereby playing a buffering and vibration-reducing role for the rotating shaft 7, reducing the rigid collision between the rotor and other components, and finally making the rotor in a balanced state, which is beneficial to improving the balance performance of the rotor during operation, reducing vibration and noise, and reducing the rotor failure rate.

[0043] In some embodiments, in combination Figures 1 to 5 As shown, a first mounting seat 6 is provided between the sliding rod 3 and the rotating shaft 7, the top of the sliding rod 3 is connected to the first mounting seat 6, a mounting hole is provided on the first mounting seat 6, and the rotating shaft 7 is rotatably connected in the mounting hole.

[0044] Specifically, a mounting hole is formed in the first mounting seat 6 corresponding to the rotating shaft 7 , and the inner diameter of the mounting hole matches the outer diameter of the rotating shaft 7 , so that the rotating shaft 7 can be rotatably mounted on the first mounting seat 6 through the mounting hole.

[0045] In some embodiments, in combination Figures 1 to 5 As shown, the number of sliding rods 3 includes at least four, and the number of support rods 2 is the same as the number of sliding rods 3; at least two sliding rods 3 are respectively arranged at both ends of the rotating shaft 7, and a first connecting plate 41 is also arranged between the sliding rod 3 and the first mounting seat 6, the top of the first connecting plate 41 is fixedly connected to the bottom of the first mounting seat 6, and the two ends of the first connecting plate 41 in the length direction are respectively hinged to at least one sliding rod 3.

[0046] Specifically, each support rod 2 is sleeved with a sliding rod 3, and a gap is reserved between the inner wall of the sliding rod 3 and the outer wall of the support rod 2, and the gap is between tens of microns and hundreds of microns. The first mounting seat 6 includes at least two, and is spaced apart along the axial direction of the rotating shaft 7. The support rod 2 is correspondingly arranged below the first mounting seat 6. Multiple support rods 2 are spaced apart in a direction perpendicular to the axis of the rotating shaft 7, and the distribution direction of multiple support rods 2 is parallel to the horizontal direction. When the rotor is running stably, the length direction of the first connecting plate 41 is perpendicular to the axial direction of the rotating shaft 7 and parallel to the horizontal direction. The two ends of the first connecting plate 41 along its length direction are respectively hinged to at least one sliding rod 3. At this time, the hinge axis is parallel to the axial direction of the rotating shaft 7. The number of the first connecting plates 41 includes multiple, and the two end faces of the sliding rod 3 along the axial direction of the rotating shaft 7 are respectively hinged to a first connecting plate 41, and there is a gap between the top of the sliding rod 3 and the bottom of the first mounting seat 6. For the vibration of the rotor in the gravity direction, the rotating shaft 7 may undergo an integral height change, or a height change may occur in which one end is high and the other end is low along its axial direction. The first connecting plate 41 is lifted and lowered as a whole under the drive of the rotating shaft 7, and drives the sliding rod 3 to simultaneously undergo a relative displacement change with the support rod 2 in the horizontal direction and the gravity direction, that is, an angle is formed between the axis of the sliding rod 3 and the axis of the support rod 2. Since the vibration of the rotor is at the micron level, the micron-level gap reserved between the support rod 2 and the sliding rod 3 can adapt to the angle change between the sliding rod 3 and the support rod 2; for the vibration of the rotor in the horizontal direction, one end of the first connecting plate 41 is high and the other end is low at both ends along the length direction, that is, when the first mounting seat 6 rotates a certain angle around the axis of the rotating shaft 7, since the first connecting plate 41 and the sliding rod 3 are hingedly connected, the spacing between the sliding rods 3 at both ends of the first connecting plate 41 in the horizontal direction is reduced, and since a micron-level gap is reserved between the support rod 2 and the sliding rod 3, the spacing between the sliding rods 3 at both ends of the first connecting plate 41 can be adapted.

[0047] In some embodiments, in combination Figures 1 to 5 As shown, at least one second connecting plate 42 is also arranged below the first connecting plate 41. The length direction of the second connecting plate 42 is parallel to the length direction of the first connecting plate 41. One end of the second connecting plate 42 along its length direction is hinged to a sliding rod 3, and the other end is hinged to another sliding rod 3.

[0048] The supporting device provided in this embodiment is configured with at least one second connecting plate 42 below the first connecting plate 41 to enhance the connection stability between the sliding rod 3 and the first connecting plate 41 .

[0049] Specifically, the number of second connecting plates 42 includes multiple ones, and the two end faces of each sliding rod 3 along the axial direction of the rotating shaft 7 are respectively hinged to at least one second connecting plate 42, thereby enhancing the stability of relative movement between the multiple sliding rods 3 located at the same end of the rotating shaft 7, and the connection stability between the sliding rod 3 and the first connecting plate 41.

[0050] In some embodiments, in combination Figures 1 to 5 As shown, the elastic member 5 includes a spring, which is sleeved on the outer peripheral side of the support rod 2, the top of the spring is fixedly connected to the bottom of the sliding rod 3, and the bottom of the spring is fixedly connected to the bottom of the support rod 2.

[0051] Specifically, the elastic member 5 includes a spring and a rubber sleeve. When the rotating shaft 7 vibrates and tilts, the rotating shaft 7 drives the sliding rod 3 to move relative to the support rod 2 through the first mounting seat 6 and the first connecting plate 41, and compresses the elastic member 5, so that the elastic member 5 forms an elastic support for the rotating shaft 7 to buffer and reduce the vibration of the rotating shaft 7, which is beneficial to improving the balance performance of the rotating shaft 7 and reducing the rigid collision between the rotor and other components, thereby reducing noise and increasing the service life of the rotor.

[0052] In some embodiments, in combination Figures 1 to 5 As shown, the supporting device also includes a base 1, which is located below the supporting rod 2 and fixedly connected to the bottom of the supporting rod 2; at least two lifting devices are also arranged between the base 1 and the rotating shaft 7, and the plurality of lifting devices are distributed at intervals along the axial direction parallel to the rotating shaft 7, and the lifting devices have a first state connected to the rotating shaft 7 to drive the rotor to move up and down, and a second state detached from the rotating shaft 7.

[0053] The support device provided in this embodiment, when the lifting device is in the first state, drives the rotor to rise and fall through the lifting device to facilitate maintenance and repair of the rotor, ensure stability and safety during the repair process, and reduce the difficulty and time of the repair process; when the lifting device is in the second state, the lifting device does not contact the rotor, thereby not affecting the elastic supporting effect of the elastic member 5 on the rotor.

[0054] Specifically, the base 1 is arranged in the horizontal direction, and the bottom of the lifting device is connected to the base 1 so that the top thereof can be lifted and lowered relative to the base 1. When the rotor is operating normally, the lifting device is in the second state, at which time the lifting device is not in contact with the rotor, thereby not affecting the elastic support of the rotor by the elastic member 5. When the rotor needs to be inspected and maintained after long-term operation, the lifting device is adjusted to the first state, and the rotor is kept at a fixed height. After the first mounting seat 6, the first connecting plate 41, the second connecting plate 42, the sliding rod 3 and the supporting rod 2 are removed in sequence, the rotor is lifted and lowered to a suitable height by the lifting device, so as to facilitate its inspection and maintenance.

[0055] In some embodiments, in combination Figures 1 to 5 As shown, the lifting device includes a second mounting seat 11 and two support rods 10 hinged in an X shape. The tops of the two support rods 10 are respectively slidably hingedly connected to the bottom of the second mounting seat 11. When the lifting device is in a first state, the side of the second mounting seat 11 away from the support rod 10 is suitable for forming a support limit for the rotating shaft 7. The height of the second mounting seat 11 is changed by changing the angle between the two support rods 10.

[0056] The supporting device provided in this embodiment adjusts the angle between the two support rods 10 so as to adjust the height of the second mounting seat 11 and drives the rotor to rise and fall through the second mounting seat 11 .

[0057] Specifically, the bottom of the support rod 10 is arranged on the base 1 and moves along the plane where the base 1 is located, so that the second mounting seat 11 located at the top of the support rod 10 is lifted and lowered relative to the base 1. By adjusting the angle between the two support rods 10, the second mounting seat 11 is connected to the rotating shaft 7, and the angle between the two support rods 10 is kept fixed so that the second mounting seat 11 forms a support limit for the rotating shaft 7. At this time, the first mounting seat 6, the first connecting plate 41, the second connecting plate 42, the sliding rod 3 and the support rod 2 are removed in sequence, and the angle between the two support rods 10 is adjusted again to adjust the rotor to a suitable height by adjusting the height of the second mounting seat 11.

[0058] In some embodiments, in combination Figures 1 to 5 As shown, the lifting device also includes a threaded rod 8 rotatably connected to the inside of the base 1, and the outer peripheral wall of the threaded rod 8 is provided with a first threaded portion 81 and a second threaded portion 82 with opposite spiral directions; the bottom of one of the support rods 10 is threadedly matched with the first threaded portion 81, and the bottom of the other support rod 10 is threadedly matched with the second threaded portion 82, and the threaded rod 8 rotates around its own axis to drive the bottoms of the two support rods 10 to move in opposite directions.

[0059] The supporting device provided in this embodiment rotates the threaded rod 8 so that the bottoms of the two support rods 10 can move synchronously in opposite directions, thereby ensuring that the second mounting seat 11 can stably perform lifting and lowering actions.

[0060] Specifically, the base 1 has a cavity inside, the threaded rod 8 is arranged in the cavity of the base 1 and is rotatably connected to the side wall of the base 1, and the bottom of the support rod 10 is hingedly connected to a sleeve block 9, and a threaded hole is formed through the sleeve block 9, and the threaded hole is respectively threadedly engaged with the first threaded portion 81 and the second threaded portion 82. The upper end surface of the base 1 has an opening to make way for the sleeve block 9 and the support rod 10. When the threaded rod 8 rotates around itself first, the two sleeve blocks 9 thereon move synchronously in opposite directions, thereby changing the angle between the two support rods 10, and then realizing the lifting and lowering of the second mounting seat 11.

[0061] In some embodiments, in combination Figures 1 to 5 As shown, a motor 15 is fixedly connected to the base 1 , and an output shaft of the motor 15 is drivingly connected to the threaded rod 8 .

[0062] Specifically, the number of threaded rods 8 includes at least two, and multiple threaded rods 8 are arranged in parallel. As a feasible implementation form, the number of motors 15 is adapted to the number of threaded rods 8, and each motor 15 is in transmission connection with a threaded rod 8 to control the rotation of the threaded rod 8; as an additional implementation form, a synchronous pulley 13 is rotatably connected to the outer wall of the base 1, and the number of synchronous pulleys 13 is adapted to the number of threaded rods 8. Each synchronous pulley 13 is coaxially fixedly connected with a threaded rod 8, and multiple synchronous pulleys 13 are sleeved with synchronous belts 14, so that one motor 15 drives one of the threaded rods 8 to drive multiple threaded rods 8 to rotate synchronously. The rotation or stop of the threaded rod 8 and the rotation direction of the threaded rod 8 are controlled by the motor 15, so as to control the lifting or stopping of the second mounting seat 11.

[0063] In some embodiments, in combination Figures 1 to 5 As shown, the second mounting seat 11 is fixedly connected to a support seat 12 on one side away from the support rod 10 . The support seat 12 forms a groove corresponding to the rotating shaft 7 . A partial area of ​​the rotating shaft 7 falls in the groove so that the support seat 12 forms a support and limit for the rotating shaft 7 .

[0064] In the support device provided in this embodiment, the support seat 12 forms a support limit for the rotating shaft 7 through the groove, which is beneficial to improving the stability and reliability of the support limit of the rotating shaft 7 by the support seat 12.

[0065] Specifically, a semi-arc groove is formed on the support seat 12 corresponding to the rotating shaft 7. The second mounting seat 11 is raised by rotating the threaded rod 8 until the inner wall of the semi-arc groove abuts against the outer peripheral wall of the rotating shaft 7. At this time, the threaded rod 8 stops rotating to form a support limit for the rotating shaft 7. The first mounting seat 6, the first connecting plate 41, the second connecting plate 42, the sliding rod 3 and the support rod 2 are removed in turn, and the threaded rod 8 is driven to rotate by the motor 15 to adjust the height of the rotor through the second mounting seat 11, thereby facilitating the inspection and maintenance of the rotor.

[0066] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. Although the embodiments of the present utility model are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations are all within the scope defined by the present utility model.

Claims

1. A supporting device, characterized in that: Used to support the rotor, the supporting device comprises: A support rod (2) is extended along the direction of gravity, and the support rod (2) is arranged below the rotating shaft (7) of the rotor; A sliding rod (3) is slidably mounted on the support rod (2), and the top of the sliding rod (3) is connected to the rotating shaft (7); An elastic member (5) has one end fixedly connected to the bottom of the support rod (2) and the other end fixedly connected to the bottom of the sliding rod (3); the elastic member (5) forms elastic support for the rotor via the sliding rod (3).

2. The support device according to claim 1, characterized in that: A first mounting seat (6) is provided between the sliding rod (3) and the rotating shaft (7); the top of the sliding rod (3) is connected to the first mounting seat (6); a mounting hole is provided on the first mounting seat (6); and the rotating shaft (7) is rotatably connected to the mounting hole.

3. The supporting device according to claim 2, characterized in that: The number of the sliding rods (3) includes at least four, and the number of the supporting rods (2) is the same as the number of the sliding rods (3); at least two of the sliding rods (3) are respectively arranged at both ends of the rotating shaft (7), and a first connecting plate (41) is also arranged between the sliding rod (3) and the first mounting seat (6), the top of the first connecting plate (41) is fixedly connected to the bottom of the first mounting seat (6), and the two ends of the first connecting plate (41) in the length direction are respectively hinged to at least one of the sliding rods (3).

4. The supporting device according to claim 3, characterized in that: At least one second connecting plate (42) is also arranged below the first connecting plate (41); the length direction of the second connecting plate (42) is parallel to the length direction of the first connecting plate (41); one end of the second connecting plate (42) along its length direction is hinged to one of the sliding rods (3), and the other end is hinged to another of the sliding rods (3).

5. The supporting device according to claim 1, characterized in that: The elastic member (5) comprises a spring, which is sleeved on the outer peripheral side of the support rod (2), the top of the spring is fixedly connected to the bottom of the sliding rod (3), and the bottom of the spring is fixedly connected to the bottom of the support rod (2).

6. The supporting device according to any one of claims 1 to 5, characterized in that: The support device also includes a base (1), the base (1) is located below the support rod (2) and is fixedly connected to the bottom of the support rod (2); at least two lifting devices are also arranged between the base (1) and the rotating shaft (7), and a plurality of the lifting devices are spaced apart along an axial direction parallel to the rotating shaft (7), and the lifting devices have a first state in which they are connected to the rotating shaft (7) to drive the rotor to move up and down, and a second state in which they are separated from the rotating shaft (7).

7. The supporting device according to claim 6, characterized in that: The lifting device comprises a second mounting seat (11) and two support rods (10) hinged in an X shape, the tops of the two support rods (10) being respectively connected to the bottom of the second mounting seat (11) by sliding hinges, and when the lifting device is in the first state, the side of the second mounting seat (11) away from the support rod (10) is suitable for forming a support limit for the rotating shaft (7), and the height of the second mounting seat (11) is changed by changing the angle between the two support rods (10).

8. The supporting device according to claim 7, characterized in that: The lifting device also includes a threaded rod (8) rotatably connected to the inside of the base (1), and the outer peripheral wall of the threaded rod (8) is provided with a first threaded portion (81) and a second threaded portion (82) with opposite spiral directions; the bottom of one of the support rods (10) is threadedly matched with the first threaded portion (81), and the bottom of the other support rod (10) is threadedly matched with the second threaded portion (82), and the threaded rod (8) rotates around its own axis to drive the bottoms of the two support rods (10) to move in opposite directions.

9. The supporting device according to claim 8, characterized in that: A motor (15) is fixedly connected to the base (1), and an output shaft of the motor (15) is drivingly connected to the threaded rod (8).

10. The supporting device according to claim 7, characterized in that: A support seat (12) is fixedly connected to the side of the second mounting seat (11) facing away from the support rod (10); the support seat (12) forms a groove corresponding to the rotating shaft (7); a partial area of ​​the rotating shaft (7) falls into the groove, so that the support seat (12) forms a support limit for the rotating shaft (7).

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