Turning device and bearing mechanism for the optical shaft of steam turbine generator set

Abstract

This invention relates to a turning device and a shaft-holding mechanism for the optical shaft of a steam turbine generator set. The shaft-holding mechanism includes a first chuck assembly, a second chuck assembly, at least two brake pads, at least two locking assemblies, and a first transmission assembly. The brake pads are respectively mounted on the wall surfaces of the first and second chuck assemblies opposite to the circumferential surface of the optical shaft, for abutting against the circumferential surface of the optical shaft. The two ends of the first and second chuck assemblies are respectively connected to form a ring by locking assemblies, so as to be arranged around the outer circumference of the optical shaft. The first transmission assembly is mounted on the first and second chuck assemblies, so as to drive the shaft-holding mechanism together with the optical shaft to rotate around the central axis of the optical shaft under the drive of the drive mechanism. This shaft-holding mechanism can be quickly and reliably installed on the optical shaft, enabling the turning device to be quickly put into turning operation, thereby ensuring the safety of the unit, avoiding permanent bending damage to the main shaft, and reducing the overhaul and maintenance period.

Description

Technical Field

[0001] This invention relates to the field of steam turbine generator set maintenance, and more particularly to a turning device for the shaft of a steam turbine generator set and its shaft-holding mechanism. Background Technology

[0002] In related technologies, steam turbine generator sets are equipped with electric turning gears and auxiliary hydraulic turning gears. These two turning gear systems are used for turning operations, but their reliability is relatively poor. Historically, similar units have repeatedly experienced situations where both turning gears simultaneously failed to function, resulting in the shaft system remaining stationary while hot during turbine generator set shutdowns. This poses a serious safety risk of shaft bending and causing significant equipment damage. Alternatively, during the upward movement of the unit after a major overhaul, the shaft turning gears may fail to start to achieve continuous turning operation, thus delaying the overhaul schedule.

[0003] Meanwhile, during the maintenance process, the shaft alignment and back-end wheel concentricity measurement take a long time; moreover, the auxiliary turning signal needs to be repeatedly reset by the main control, which takes a long time to communicate and the turning speed is slow, affecting the shaft alignment adjustment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a turning device for the optical shaft of a steam turbine generator set and its shaft-holding mechanism.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a shaft-holding mechanism for an optical axis, comprising a first cuff assembly, a second cuff assembly, at least two brake pads, at least two locking assemblies, and a first transmission assembly;

[0006] The brake pads are respectively mounted on the wall surfaces of the first and second cuff assemblies that are opposite to the circumferential surface of the optical axis, and are used to abut against the circumferential surface of the optical axis;

[0007] The two ends of the first and second handcuff assemblies are respectively connected to form a ring by the locking assembly, so as to be arranged around the outer periphery of the optical axis;

[0008] The first transmission component is mounted on the first and second handcuff components to drive the shaft-holding mechanism and the optical axis to rotate around the central axis of the optical axis under the drive of the drive mechanism.

[0009] In some embodiments, the first handcuff assembly includes a first arched portion disposed on the outer periphery of the optical axis, and two first mating portions extending outward from both ends of the first arched portion toward the optical axis; the first arched portion has a first bottom wall surface that is arc-shaped and opposite to the peripheral surface of the optical axis, and the brake pad covers the first bottom wall surface; the first mating portions are used to connect with the locking assembly;

[0010] Furthermore, the second handcuff assembly includes a second arched portion disposed on the outer periphery of the optical axis, and two second mating portions extending outward from both ends of the second arched portion toward the optical axis; the second arched portion has a second bottom wall surface that is opposite to the peripheral surface of the optical axis and is arc-shaped, and the brake pad covers the second bottom wall surface; the second mating portions are used to connect with the locking assembly.

[0011] In some embodiments, the latch assembly includes a locking rod, a locking plate, and a locking element;

[0012] The locking bar is longitudinally elongated and has a first end and a second end opposite to the first end;

[0013] The first end is hinged to one of the second mating parts, so that the locking rod rotates about the first end as a base point and enters the first mating part;

[0014] The second end is configured such that when the locking rod enters the corresponding first mating part, the second end protrudes from the surface of the first mating part away from the second mating part;

[0015] The locking plate is used to be sleeved on the second end;

[0016] The locking element is used to fix the locking plate to the second end.

[0017] In some embodiments, the first arched portion includes:

[0018] At least two first ribs, each arched in shape; the at least two first ribs are arranged at intervals along the optical axis.

[0019] Multiple first crossbeams are respectively mounted on the at least two first ribs to connect the at least two first ribs together in a side-by-side manner;

[0020] The first brake pad is mounted on the inner wall surface of the at least two first ribs opposite to the circumferential surface of the optical axis;

[0021] And, the second arched portion includes:

[0022] At least two second ribs, each arched in shape; the at least two second ribs are arranged at intervals along the optical axis.

[0023] Multiple second crossbeams are respectively mounted on the at least two second ribs to connect the at least two second ribs together in a side-by-side manner;

[0024] The second brake pad is mounted on the inner wall surface of the at least two second ribs opposite to the circumferential surface of the optical axis;

[0025] The at least two brake pads respectively cover the wall surfaces of the first brake pad and the second brake pad facing the optical axis.

[0026] In some embodiments, each of the first mating portions includes a first mating plate located on the same side of the optical axis and having the same number as the number of the first ribs. The first mating plate is correspondingly coupled to the end of the first rib and extends outward in the circumferential direction along the optical axis.

[0027] In addition, each of the first mating parts includes a second mating plate located on the same side of the optical axis and having the same number as the second ribs, the second mating plate being correspondingly coupled to the end of the second rib and extending outward in the circumferential direction along the optical axis.

[0028] In some embodiments, the first transmission component includes at least two arc-shaped gears;

[0029] The arc-shaped gears are respectively mounted on the first cuff assembly and the second cuff assembly, and when the first cuff assembly and the second cuff assembly are combined into a ring, they form a hollow gear that is arranged around the circumference of the optical axis and is concentric with the optical axis.

[0030] In some embodiments, each of the arc-shaped gears has a first mounting groove on its end face opposite to the first or second handcuff assembly;

[0031] The first and second handcuff assemblies have a first protrusion on the surface of the arc-shaped gear that mates with the first mounting groove.

[0032] In some embodiments, the bearing mechanism further includes a connecting assembly for mechanically connecting another of the first mating parts and the corresponding second mating part;

[0033] The connecting assembly includes a connecting rod, a first bolt, and a second bolt; the first bolt passes through the first mating part along the optical axis, and the second bolt passes through the second mating part along the optical axis; the two ends of the connecting rod are respectively hinged to the first bolt and the second bolt.

[0034] In some embodiments, at least one centering component is further included for centering the optical axis with the first transmission component;

[0035] The centering assembly includes a fixing part mounted on the axial end face of the arc gear, and a set screw that passes radially through the fixing part along the optical axis and can move radially. The end of the set screw near the optical axis is used to abut against the circumferential surface of the optical axis.

[0036] The present invention also includes a turning device, comprising a drive mechanism and the aforementioned bearing mechanism;

[0037] The drive mechanism mechanically cooperates with the first transmission component of the shaft-holding mechanism to drive the shaft-holding mechanism together with the optical axis to rotate around the central axis of the optical axis.

[0038] In some embodiments, the turning device further includes a first slide rail, a base that slides on the first slide rail, and a second slide rail disposed on the base;

[0039] The first slide rail extends axially along the optical axis;

[0040] The second slide rail extends in a direction perpendicular to the optical axis.

[0041] The drive mechanism is slidably connected to the second slide rail.

[0042] The present invention has the following advantages: the shaft clamping mechanism can be applied to the optical shaft of a steam turbine generator set. It has a simple structure and can be installed on the optical shaft quickly and reliably. It can be put into operation by driving the transmission components to rotate. The whole assembly process is simple and quick, which can enable the turning gear device to be put into operation quickly, thereby ensuring the safety of the unit, avoiding permanent bending damage to the shaft, and reducing the overhaul and maintenance period. Attached Figure Description

[0043] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0044] Figure 1 This is a schematic diagram of the drive mechanism and sliding mechanism in the turning gear device of the present invention;

[0045] Figure 2 This is a schematic diagram of the connection between the drive mechanism and the shaft-holding mechanism in the turning gear device of the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of the shaft-holding mechanism of the present invention, which is arranged around the outer periphery of the optical axis;

[0047] Figure 4 This is a schematic diagram of the structure of the shaft-holding mechanism of the present invention after it is locked in the front direction;

[0048] Figure 5 yes Figure 4 A schematic diagram of the structure in a side view;

[0049] Figure 6 yes Figure 4 A schematic diagram of the structure from a top-down view;

[0050] Figure 7 yes Figure 4 A structural diagram from the reverse side;

[0051] Figure 8 This is a schematic diagram of the connecting rod of the bearing mechanism of the present invention. Detailed Implementation

[0052] To provide a clearer understanding of the technical features, objectives, and effects of this invention, specific embodiments are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on this invention.

[0053] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0054] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0055] This invention constructs a turning gear device that can be used as an emergency turning gear for steam turbine generator sets. It allows for rapid assembly when neither the main electric turning gear nor the auxiliary hydraulic turning gear is available, enabling continuous rotor shaft rotation and ensuring unit safety. Alternatively, it can drive shaft rotation during nuclear power unit maintenance. Furthermore, in this embodiment, the turning gear device can achieve a maximum torque output greater than 10 times the rotor starting torque; it can be quickly put into operation, assembling and operational within one hour; moreover, the device has a compact overall design, avoiding extensive on-site modifications, saving time and improving efficiency.

[0056] like Figures 1-8 As shown, the rotating device includes a shaft clamping mechanism 1 and a drive mechanism 2. The shaft clamping mechanism 1 is arranged around the outer periphery of the optical shaft 100 and is used to clamp the optical shaft 100; the drive mechanism 2 is arranged around the shaft clamping mechanism 1 and, through mechanical cooperation with the shaft clamping mechanism 1, drives the shaft clamping mechanism 1 together with the optical shaft 100 to rotate around the central axis of the optical shaft 100.

[0057] In some embodiments, the turning device further includes a base 3 and a first slide rail 4. The base 3 serves as a carrier for the drive mechanism 2, which is fixed to the base 3. The first slide rail 4 is located at the bottom of the base 3 and extends axially along the optical axis 100. The base 3 is mounted on the first slide rail 4, and the base 3 and the drive mechanism 2 are displaced axially along the optical axis 100, thereby adjusting the axial position of the drive mechanism 2 relative to the optical axis 100. A second slide rail assembly 5 is provided on the base 3, and the drive mechanism 2 can be mounted on the second slide rail assembly 5 and displaced in an axial direction perpendicular to the optical axis 100, thereby adjusting the distance of the drive mechanism 2 from the circumferential surface of the optical axis 100. It can be understood that by setting the first slide rail 4 and the second slide rail assembly 5, the drive mechanism 2 can be quickly and accurately engaged with the shaft clamping mechanism 1, greatly reducing the installation workload when deploying the emergency maintenance turning device. It is an auxiliary component for realizing the rapid deployment of the emergency maintenance turning device.

[0058] It should be noted that conventional turning devices are suitable for rotating shafts with grooves or non-cylindrical rotating shafts. However, conventional turning devices are difficult to drive the optical shaft 100, which has a smooth and flat circumferential surface, to rotate. The present invention constructs a shaft-holding mechanism 1 that can clamp onto the circumferential surface of the optical shaft 100, thereby enabling the optical shaft 100 system of the rotor to rotate.

[0059] like Figure 3 As shown, the bearing mechanism 1 has a split structure and includes a brake pad 11, a first shackle assembly 12, a second shackle assembly 13, a locking assembly 14, and a first transmission assembly 15.

[0060] The first cuff assembly 12 and the second cuff assembly 13 are respectively disposed on opposite sides of the outer periphery of the optical axis 100, and can be combined and connected by the locking assembly 14 to form an annular portion for surrounding the optical axis 100. Brake pads 11 are respectively disposed on the wall surfaces of the first cuff assembly 12 and the second cuff assembly 13 opposite to the peripheral surface of the optical axis 100, for abutting against the peripheral surface of the optical axis 100; when the first cuff assembly 12 and the second cuff assembly 13 are combined and connected to the outer periphery of the optical axis 100, the optical axis 100 can be clamped by the brake pads 11. The locking assembly 14 includes at least two components, respectively connecting the two ends of the first cuff assembly 12 and the second cuff assembly 13, thereby securely combining the first cuff assembly 12 and the second cuff assembly 13 together. Simultaneously, the locking assembly 14 also ensures that the annular portion formed by the combination of the first cuff assembly 12 and the second cuff assembly 13 is concentric with the optical axis 100. The first transmission assembly 15 is mounted on the first cuff assembly 12 and / or the second cuff assembly 13 for cooperating with the drive mechanism 2; the power output by the drive mechanism 2 is transmitted to the first cuff assembly 12 and the second cuff assembly 13 through the first transmission assembly 15 to drive the first cuff assembly 12 and the second cuff assembly 13 together with the optical axis 100 to rotate.

[0061] Understandably, the entire shaft clamping mechanism 1 has a simple structure and can be quickly assembled even on-site. Furthermore, during installation, it can quickly align with the center of the optical axis 100, thus significantly reducing maintenance time.

[0062] In some embodiments, the first handcuff assembly 12 and the second handcuff assembly 13 are generally in a symmetrical arc-shaped structure, and the arc of the bottom wall surface opposite to the circumferential surface of the optical axis 100 is the same.

[0063] The first handcuff assembly 12 includes a first arched portion disposed on the outer periphery of the optical axis 100, and two first mating portions extending outward from both ends of the first arched portion toward the periphery of the optical axis 100. The first arched portion has a first bottom wall surface that is arc-shaped and opposite to the circumferential surface of the optical axis 100, and the brake pad 11 can be mounted on the first bottom wall surface to abut against the optical axis 100. The two first mating portions are used to cooperate with the locking assembly 14 to connect the second handcuff assembly 13. The two portions respectively have a first mating space and a first mating groove for cooperating with the locking assembly 14, wherein the first mating space is formed in the first mating portion, and the first mating groove is disposed on the top of the first mating portion away from the second handcuff assembly 13.

[0064] The second handcuff assembly 13 includes a second arched portion disposed on the outer periphery of the optical axis 100, and two second mating portions extending outward from the optical axis 100 along both ends of the second arched portion; a brake pad 11 is also mounted on the second bottom wall surface of the second arched portion that is opposite to the peripheral surface of the optical axis 100 and is arc-shaped; the two mating portions each have a second mating space for mating with the locking assembly 14, and the second mating space is formed in the corresponding second mating portion.

[0065] Understandably, when the first cuff assembly 12 and the second cuff assembly 13 are mounted on the optical axis 100, the first cuff assembly 12 and the second cuff assembly 13 are symmetrical about the radial center line of the optical axis 100; the first mating part located on one side of the optical axis 100 and the second mating part located on the same side are arranged opposite to each other, and the first mating part and the second mating part are connected by the locking assembly 14.

[0066] In some embodiments, such as Figure 3 , Figure 4 As shown, the first arched portion may include multiple first ribs 121, multiple first crossbeams 123, and a first brake pad 124. The multiple first ribs 121 are spaced apart along the axial direction of the optical axis 100 on the outer periphery of the optical axis 100, forming the main part of the first arched portion. The multiple first crossbeams 123 are respectively fixedly connected to the multiple first ribs 121, used to fix the multiple first ribs 121 together side-by-side along the axial direction of the optical axis 100, increasing the overall structural strength of the first arched portion. The first brake pad 124 serves as a carrier for the brake pad 11, mounted on the wall surface of the multiple first ribs 121 opposite to the circumferential surface of the optical axis 100.

[0067] Optionally, the number of first ribs 121 is at least two, and in this embodiment, the number of first ribs 121 is three, to ensure structural strength. The number of first crossbeams 123 is at least two, and in this embodiment, the number of first crossbeams 123 is five.

[0068] In some embodiments, the first rib 121 may be an arched plate-like structure with a concave wall surface corresponding to the outer circumferential curvature of the optical axis 100. Secondly, the first transmission assembly 15 is disposed on one axial side of the first arched portion, that is, on the side adjacent to the plurality of first ribs 121. The first rib 121 adjacent to the first transmission assembly 15 is provided with a first protrusion for engaging with the first transmission assembly 15; this first protrusion is an arc-shaped strip structure that protrudes from the wall surface of the first rib 121 adjacent to the first transmission assembly 15 opposite to the first transmission assembly 15 toward the first transmission assembly 15.

[0069] In some embodiments, the first crossbeam 123 is welded to each of the first ribs 121, connecting the side-by-side first ribs 121 together. The multiple first crossbeams 123 are arranged at intervals along the extending direction (circumferential direction) of the first ribs 121.

[0070] In some embodiments, the first brake pad 124 is a curved plate-like structure mounted on the concave wall of the first rib 121; the curvature of the first brake pad 124 matches the concave wall of the first rib 121 (concentrically arranged). The wall surface of the first brake pad 124 opposite to the circumferential surface of the optical axis 100 serves as the aforementioned first bottom wall surface.

[0071] Optionally, the multiple first ribs 121, multiple first crossbeams 123, and first brake pads 124 can be connected by welding. Of course, other connection methods can also be used, such as bonding or snap-fitting, as long as the connection strength is maintained, and no specific limitation is made here.

[0072] Correspondingly, the second handcuff assembly 13 includes a plurality of second ribs 131, a plurality of second crossbeams 133, and a second brake pad 134; a second protrusion is provided on the second rib 131 adjacent to the first transmission assembly 15. The shape and function of the second ribs 131, the second crossbeams 133, the second brake pads 134, and the second protrusion can be referred to the first handcuff assembly 12, and will not be described in detail here.

[0073] In some embodiments, such as Figure 3 , Figure 4 As shown, a single first mating part includes a plurality of first mating plates 122 located on the same side of the optical axis 100. The first mating plate 122 is attached to the end of the first rib 121 and extends outward in the circumferential direction along the optical axis 100. The mating method can be integral or welded to the first rib 121.

[0074] The number of first mating plates 122 is adapted to the number of first ribs 121. Correspondingly, at least two first mating plates 122 are provided on each side of the optical axis 100. Among the plurality of first mating plates 122 on one side, the top surface of the first mating plate 122 away from the second handcuff assembly 13 is provided with a first groove 125 that mates with the latch assembly 14. It can be understood that the plurality of first grooves 125 located on the same side of the optical axis 100 are arranged at intervals along a straight line parallel to the axis of the optical axis 100, and are combined to form a first mating groove, which is a longitudinally elongated channel. Secondly, since the plurality of first ribs 121 located on the same side of the optical axis 100 are arranged at intervals, there are several intervals between the plurality of first mating plates 122 located on the same side of the optical axis 100, and these intervals form a first mating space. In some embodiments, such as Figure 3 , Figure 4As shown, a single second mating part includes multiple second mating plates 132 located on the same side of the optical axis 100. The second mating plate 132 is attached to the end of the second rib 131 and extends outward in the circumferential direction along the optical axis 100. The attachment method can be integral or welded to the first rib 121. The number of second mating plates 132 matches the number of second ribs 131. Correspondingly, at least two second mating plates 132 are provided on each side of the optical axis 100.

[0075] Preferably, the first mating plate 122 and the second mating plate 132, which are located on the same side of the same circumference of the optical axis 100, are arranged symmetrically.

[0076] like Figure 3 As shown, in some embodiments, the brake pad 11 has a curved, layered structure and is fastened to the wall surface of the first brake pad 124 and / or the second brake pad 134 opposite to the peripheral surface of the optical axis 100. The fastening method can be chosen differently depending on the material of the brake pad, such as embedding or screwing. In some embodiments, screwing is used, with multiple countersunk holes 111 recessed towards the first rib 121 or the second rib 131 on the wall surface of the brake pad 11 that abuts against the optical axis 100. The brake pad 11 is fastened to the first brake pad 124 and / or the second brake pad 134 by passing a fixing bolt through the countersunk holes 111 and extending into the first brake pad 124 and / or the second brake pad 134. The design of the countersunk holes 111 ensures that the peripheral surface of the optical axis 100 is not scratched by the fixing bolt. The brake pad 11 can be made of different materials according to actual needs. In this embodiment, it is preferably made of a material with high friction that will not damage the outer peripheral wall surface of the optical axis 100, such as asbestos.

[0077] like Figure 3 , Figure 5As shown, the locking assembly 14 includes a locking rod 141, a locking member, and a locking plate 142 that mates with the locking rod 141. The locking rod 141 is longitudinally elongated and serves as a connector between the first and second mating parts. It includes a square-column-shaped locking rod body 1411, a rod-shaped hinge portion 1412 extending outwards from opposite ends of the locking rod body 1411, and a rod-shaped portion 1413. The hinge portion 1412 extends into the second mating space and is hinged to the second mating part, allowing the locking rod body 1411 and the rod-shaped portion 1413 to rotate around the second mating part. The rod-shaped portion 1413 enters the first mating part, and when it enters the first mating space, the end of the rod-shaped portion 1413 away from the hinge portion 1412 protrudes from the top surface of the first mating part away from the second handcuff assembly 13, and the end of the rod-shaped portion 1413 away from the hinge portion 1412 has an external thread. The locking plate 142 has a rectangular plate structure. It can be sleeved on the end of the rod-shaped part 1413 away from the hinge part 1412 and embedded in the first mating groove of the first mating part. Then, a locking part (such as a nut or other part with internal threads) is used to connect with the external threads of the rod-shaped part 1413 to lock the locking plate 142 in the first mating groove, thereby locking the rod-shaped part 1413 in the first mating space and completing the mechanical connection between the first mating part and the second mating part located on the same side of the optical axis 100.

[0078] In some embodiments, the diameter of the rod-shaped portion 1413 is smaller than the diameter of the locking rod body 1411, such that a positioning step surface 1414 for positioning is formed between the rod-shaped portion 1413 and the locking rod body 1411. This positioning step surface 1414 can abut against the first mating portion and / or the second mating portion during the assembly and connection of the first cuff assembly 12 and the second cuff assembly 13, to confirm that the first cuff assembly 12 and the second cuff assembly 13 are concentric, saving alignment time between the first cuff assembly 12 and the second cuff assembly 13. Preferably, the length of the positioning step surface 1414 in the axial direction of the optical axis 100 is greater than the interval between two adjacent first ribs / second ribs.

[0079] In some embodiments, the hinge portion 1412 of the locking rod 141 is provided with a through hole, which extends into the gap between two adjacent second ribs 131 and can be hinged to a connecting bolt passing through the two adjacent second ribs 131. The rod-shaped portion 1413 of the locking rod 141 can rotate around the connecting bolt and enter the gap between two adjacent first ribs 121. After the rod-shaped portion 1413 enters the gap between two adjacent first ribs 121, the end of the rod-shaped portion 1413 away from the hinge portion 1412 protrudes from the top surface of the first mating portion away from the second handcuff assembly 13. At the same time, the end of the rod-shaped portion 1413 away from the hinge portion 1412 is provided with an external thread. After passing through the locking plate 142 installed in the first groove 125, the nut abuts against the locking plate 142 and presses the first mating portion onto the positioning step surface 1414, thereby fixing the first mating portion and ensuring the concentricity of the first handcuff assembly 12 and the second handcuff assembly 13.

[0080] In this embodiment, there are three first ribs 121 and three second ribs 131. The first mating part and the second mating part located on the same side of the optical axis 100 are mechanically connected by two locking assemblies 14 to ensure connection strength. The hinge part 1412 and the rod-shaped part 1413 of the two locking assemblies 14 respectively extend into the two gaps between the three second ribs 131 and the two gaps between the three first ribs 121. At the same time, the locking plate 142 of the two locking assemblies 14 can be replaced with a common long locking plate 142 whose length matches the first mating groove to save assembly time.

[0081] like Figure 7 As shown, the first transmission assembly 15 includes a first arc-shaped gear 151 and a second arc-shaped gear 152 that can be connected. When the first shackle assembly 12 and the second shackle assembly 13 are combined into a ring, the first arc-shaped gear 151 and the second arc-shaped gear 152 can form a hollow external gear that is arranged around the circumference of the optical axis 100 and concentric with the optical axis 100. Preferably, the first arc-shaped gear 151 and the second arc-shaped gear 152 are both semi-circular rings with the same inner diameter.

[0082] In some embodiments, the inner diameters of the first arc gear 151 and the second arc gear 152 are larger than the inner diameters of the first cuff assembly 12 and the second cuff assembly 13, such that the inner diameter of the hollow external gear is larger than the inner diameter of the cuff assembly when they are assembled into a ring, so as to avoid the arc gear from contacting the optical axis 100.

[0083] The connection between the first arc-shaped gear 151 and the first shackle assembly 12 can be achieved using quick, convenient, and reliable methods such as key connection, friction plate connection, and bolt connection. In some embodiments, the first arc-shaped gear 151 is connected to the first rib plate 121 using a stop fit. The first arc-shaped gear 151 has a first mounting groove on its side opposite to the first rib plate 121; this first mounting groove can engage with a first protrusion on the first rib plate 121 adjacent to the first arc-shaped gear 151, and the first protrusion can extend into and be fixedly connected within the first mounting groove. The fixed connection can be achieved by bolting the first arc-shaped gear 151 through it and screwing it onto the first protrusion to fix the first arc-shaped gear 151 onto the first rib plate 121.

[0084] Understandably, during the rotation of the bearing mechanism 1, the first protrusion can abut against the wall of the first mounting groove, allowing the first arc-shaped gear 151 and the first shackle assembly 12 to transmit power using the friction between the first protrusion and the first mounting groove, thereby reducing the shear force of the bolt and extending its service life. Preferably, the contact surface between the first protrusion and the first mounting groove can be treated with electro-erosion and roughening to achieve a surface roughness of 6.4 μm to increase the surface friction coefficient.

[0085] Similarly, the second arc-shaped gear 152 is provided with a second assembly groove. The structure and function of the second assembly groove can be referred to the first assembly groove, and will not be described in detail here.

[0086] In other embodiments, the first transmission component 15 may also be three or more arc-shaped gears, which are respectively mounted on the first shackle assembly 12 and the second shackle assembly 13, and when the first shackle assembly 12 and the second shackle assembly 13 are combined to form a ring, they form a complete hollow gear that is disposed on the circumference of the optical axis 100.

[0087] In some embodiments, the first transmission assembly 15 further includes a wedge block 153 for tightly connecting the first arc gear 151 and the second arc gear 152. Correspondingly, a first pin groove 1512 is provided at both ends of the first arc gear 151, and a second pin groove 1522 is provided at both ends of the second arc gear 152. The first pin groove 1512 and the second pin groove 1522 can be combined to form a complete pin groove, the shape of which matches the shape of the wedge block 153. The wedge block 153 can be inserted into the pin groove formed by the combination of the first pin groove 1512 and the second pin groove 1522 located on the same side of the optical axis 100, so that the ends of the first arc gear 151 and the second arc gear 152 located on the same side of the optical axis 100 are tightly connected. Preferably, the first pin groove 1512 and the second pin groove 1522 are symmetrical T-shaped grooves; the first pin groove 1512 is provided with a conical surface opposite to the second pin groove 1522, and the second pin groove 1522 is provided with a conical surface opposite to the first pin groove 1512; the wedge block 153 is inserted into the pin groove in a single-sided conical surface engagement manner, thereby ensuring that the first arc gear 151 and the second arc gear 152 are concentric after the wedge block 153 is installed, and will not be axially misaligned.

[0088] Preferably, the end face of the wedge block 153 that does not contact the first arc gear 151 or the second arc gear 152 is also provided with a threaded hole 1531 to facilitate the removal of the wedge block 153 from the first pin groove 1512 and the second pin groove 1522. The wedge block 153 can be pulled out by extending a guide post with external threads into the threaded hole 1531.

[0089] like Figure 3 , Figure 6 as well as Figure 8 As shown, the shaft-holding mechanism 1 also includes a connecting assembly 16 for mechanically connecting the first mating part and the second mating part located on the same side of the optical axis 100. The connecting assembly 16 includes a connecting rod 161, and a first bolt 162 and a second bolt 163 that respectively connect the two ends of the connecting rod 161 to the first cuff assembly 12 and the second cuff assembly 13. The connecting assembly 16 can transform the shaft-holding mechanism 1 into a single-sided open structure, avoiding axial misalignment of the first cuff assembly 12 and the second cuff assembly 13, thereby saving time in axial positioning of the two.

[0090] The connecting rod 161 includes a first connecting portion 1611, a second connecting portion 1612, and a connecting body 1613 located between the first connecting portion 1611 and the second connecting portion 1612. The connecting body 1613 is used to connect the first connecting portion 1611 and the second connecting portion 1612; the first connecting portion 1611 is used to extend into the gap between a plurality of first ribs 121 to be fixedly connected / hinged to a first mating portion; the second connecting portion 1612 is used to extend into the gap between a plurality of second ribs 131 to be movably connected to a second mating portion.

[0091] 5. In some embodiments, the connecting rod 161 is a bend-shaped structure, that is, the first connecting part 1611 and the second connecting part 1612 are staggered and are not located on the same longitudinal line; so as to avoid the locking assembly 14.

[0092] In some embodiments, the first connecting portion 1611 includes a first U-shaped portion extending from the connecting body 1613 toward the first mating portion; a pair of sidewalls of the first U-shaped portion are respectively provided for the first bolt 162 to pass through.

[0093] A first through hole 16111 is provided. The first U-shaped part extends into the first mating part, and the inner circumference position of the first U-shaped part can serve as a clearance part to avoid the first rib 121 passed during the extension process, and is connected by the first bolt 162.

[0094] A first rib 121 and a first through hole 16111 are provided to fix / hinge the first connecting part 1611 to the first mating part. Optionally, the first through hole 16111 is an oblong hole to allow adjustment of the relative distance between the first cuff assembly 12 and the second cuff assembly 13 while ensuring rotational effect, so as to avoid conflict with the locking assembly 14.

[0095] The specific structure of the second connecting portion 1612 is the same as that of the first connecting portion 1611. The second connecting portion 1612 includes a second U-shaped portion. By extending the second U-shaped portion into the second mating portion and by passing the second bolt 163 through the second rib 131 and the second U-shaped portion, the second connecting portion 1612 is hinged to the second mating portion. Preferably, the second bolt 163 and the aforementioned connecting bolt can share the same bolt.

[0096] like Figure 7 As shown, the shaft clamping mechanism 1 also includes a centering component 17 for centering the first transmission component 15 and the optical shaft 100.

[0097] The centering assembly 17 may include a fixing part 171 and a set screw 172. The fixing part 171 may be mounted on the end face of the first arc gear 151 away from the first rib 121 or on the end face of the second arc gear 152 away from the second rib 131. The set screw 172 is radially inserted and screwed into the fixing part 171, and can be displaced closer to or away from the circumferential surface of the optical axis 100. The end of the set screw 172 close to the optical axis 100 is used to abut against the circumferential surface of the optical axis 100. Understandably, the set screw 172 can adjust the position of the center of the shaft-holding mechanism 1 relative to the center of the optical axis 100 by abutting against the circumferential surface of the optical axis 100, thereby completing the centering adjustment. It should be noted that after centering is completed, the end of the set screw 172 close to the optical axis 100 needs to be moved away from the circumferential surface of the optical axis 100 to avoid hindering rotation.

[0098] In some embodiments, the shaft-holding mechanism 1 includes four centering components 17, which are arranged in a ring and at equal intervals around the optical axis 100 on the end faces of the first transmission component 15 that are away from the first handcuff assembly 12 and the second handcuff assembly 13. Of the four centering components 17, two centering components 17 are disposed on the end face of the first arc gear 151 away from the first handcuff assembly 12, and the other two centering components 17 are disposed on the end face of the second arc gear 152 away from the second handcuff assembly 13.

[0099] Preferably, the set screws 172 of each centering component 17 are of the same length.

[0100] In some embodiments, the centering component 17 may be a positioning pin. The positioning pin may pass through the gap between the first arc gear 151 and the first cuff assembly 12 and the rotor along the axial direction of the optical axis 100, or pass through the gap between the second arc gear 152 and the second cuff assembly 13 and the rotor; to complete the concentricity adjustment between the first transmission component 15 and the optical axis 100.

[0101] like Figure 1 , Figure 2As shown, the drive mechanism 2 includes a motor 21, a reduction gearbox 22, and a second transmission assembly 23. The motor 21 provides power, driving the second transmission assembly 23 to rotate via the reduction gearbox 22. The second transmission assembly 23 mechanically engages with the first transmission assembly 15 of the shaft-holding mechanism 1, forming a transmission pair when mechanically connected to the first transmission assembly 15, thereby achieving the rotation of the shaft-holding mechanism 1 and the optical shaft 100 around the central axis of the optical shaft 100. It should be noted that the motor 21 and reduction gearbox 22 can be selected based on the rotor starting torque, safety factor, and speed requirements. The motor 21 is only one way to provide power; it can be modified to be pneumatic, hydraulic, etc., depending on site conditions. The second transmission assembly 23 may include a pulley, chain wheel, or transmission gear. When the second transmission assembly 23 is a transmission gear, the thickness of the transmission gear is greater than the thickness of the first arc-shaped gear 151 and the second arc-shaped gear 152 in the first transmission assembly 15.

[0102] In some embodiments, the drive mechanism 2 further includes a protective cover 24 for protecting the gear assembly; the protective cover 24 has an opening opposite to the bearing mechanism 1. The distance between the drive mechanism 2 and the bearing mechanism 1 is adjusted by the sliding mechanism 3, so that the first transmission component 15 of the bearing mechanism 1 enters the protective cover 24 and meshes with the gear assembly.

[0103] In some embodiments, the base 3 is generally cuboid; the second slide rail assembly 5 is disposed on the top of the base 3, and includes a second slide rail 51 disposed on the top of the base 3 and a slide plate 52 slidable on the second slide rail 51; the second slide rail 51 extends along an axial direction perpendicular to the optical axis 100. The drive mechanism 2 can be fixed to the slide plate 52 by welding or bolting to ensure that the drive mechanism 2 is securely mounted on the slide plate 52. In this embodiment, four M42 screws are used to fasten the four corner positions of the drive mechanism 2.

[0104] The base 3 is also provided with a first adjusting screw 31 for controlling its displacement on the first slide rail 4 and a second adjusting screw 32 for controlling the displacement of the sliding plate 52 on the second slide rail 51. The extension direction of the first adjusting screw 31 is parallel to the axial direction of the optical axis 100, and the extension direction of the second adjusting screw 32 is perpendicular to the axial direction of the optical axis 100. The first adjusting screw 31 and the second adjusting screw 32 have a self-locking function, which can limit the displacement of the base 3 and the sliding plate 52.

[0105] Preferably, the bottom surface of the first slide rail 4 and the bottom surface of the drive mechanism 2 in contact with the sliding plate 52 are roughened by electro-corrosion to increase friction.

[0106] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A shaft-holding mechanism for an optical axis, characterized in that, It includes a first handcuff assembly (12), a second handcuff assembly (13), at least two brake pads (11), at least two locking assemblies (14), and a first transmission assembly (15). The brake pads (11) are respectively mounted on the wall surfaces of the first cuff assembly (12) and the second cuff assembly (13) that are opposite to the peripheral surface of the optical axis, and are used to abut against the peripheral surface of the optical axis; The two ends of the first handcuff assembly (12) and the second handcuff assembly (13) are respectively connected to form a ring by the locking assembly (14) so ​​as to be arranged around the outer periphery of the optical axis; The first transmission component (15) is mounted on the first handcuff assembly (12) and the second handcuff assembly (13) so as to drive the shaft holding mechanism (1) together with the optical axis to rotate around the central axis of the optical axis under the drive of the drive mechanism (2); The first transmission assembly (15) includes at least two arc-shaped gears; The arc-shaped gears are respectively mounted on the first handcuff assembly (12) and the second handcuff assembly (13), and when the first handcuff assembly (12) and the second handcuff assembly (13) are combined into a ring, they form a hollow gear that is arranged around the optical axis and is concentric with the optical axis. Each of the arc-shaped gears has a first mounting groove on its end face opposite to the first shackle assembly (12) or the second shackle assembly (13); the first shackle assembly (12) and the second shackle assembly (13) have a first protrusion on their surfaces relative to the arc-shaped gears that mates with the first mounting groove; the arc-shaped gears and the first shackle assembly (12) or the second shackle assembly (13) are driven by friction between the first protrusion and the first mounting groove.

2. The shaft-holding mechanism for an optical axis according to claim 1, characterized in that, The first handcuff assembly (12) includes a first arched portion disposed on the outer periphery of the optical axis, and two first mating portions extending outward from both ends of the first arched portion toward the optical axis; the first arched portion has a first bottom wall surface that is opposite to the peripheral surface of the optical axis and is arc-shaped, and the brake pad (11) covers the first bottom wall surface; the first mating portions are used to connect with the locking assembly (14); The second handcuff assembly (13) includes a second arched portion disposed on the outer periphery of the optical axis, and two second mating portions extending outward from both ends of the second arched portion toward the optical axis; the second arched portion has a second bottom wall surface that is opposite to the peripheral surface of the optical axis and is arc-shaped, and the brake pad (11) covers the second bottom wall surface; the second mating portions are used to connect with the locking assembly (14).

3. The shaft-holding mechanism for an optical axis according to claim 2, characterized in that, The locking assembly (14) includes a locking rod (141), a locking plate (142), and a locking element; The locking bar (141) is longitudinally elongated and has a first end and a second end opposite to the first end; The first end is hinged to one of the second mating parts so that the locking rod (141) rotates about the first end as a base point and enters the first mating part; The second end is configured such that when the locking bar (141) enters the corresponding first mating part, the second end protrudes from the surface of the first mating part away from the second mating part; The locking plate (142) is used to be sleeved on the second end; The locking element is used to fix the locking plate (142) to the second end.

4. The shaft-holding mechanism for an optical axis according to claim 2, characterized in that, The first arched portion includes: At least two first ribs (121) are arched; the at least two first ribs (121) are arranged at intervals along the optical axis. Multiple first crossbeams (123) are respectively mounted on the at least two first ribs (121) to connect the at least two first ribs (121) side by side; The first brake pad (124) is mounted on the inner wall surface of the at least two first ribs (121) opposite to the circumferential surface of the optical axis; And, the second arched portion includes: At least two second ribs (131), each of which is arched; the at least two second ribs (131) are arranged at intervals along the optical axis. Multiple second crossbeams (133) are respectively mounted on the at least two second ribs (131) to connect the at least two second ribs (131) side by side; The second brake pad (134) is mounted on the inner wall surface of the at least two second ribs (131) opposite to the circumferential surface of the optical axis; The at least two brake pads (11) respectively cover the wall surfaces of the first brake pad (124) and the second brake pad (134) facing the optical axis.

5. The shaft-holding mechanism for an optical axis according to claim 4, characterized in that, Each of the first mating parts includes a first mating plate (122) located on the same side of the optical axis and having the same number as the first ribs (121). The first mating plate (122) is correspondingly coupled to the end of the first rib (121) and extends outward in the circumferential direction along the optical axis. In addition, each of the first mating parts includes a second mating plate (132) located on the same side of the optical axis and having the same number as the second ribs (131), the second mating plate (132) being correspondingly coupled to the end of the second rib (131) and extending outward in the circumferential direction along the optical axis.

6. The shaft-holding mechanism for an optical axis according to claim 3, characterized in that, The bearing mechanism (1) further includes a connecting assembly (16) for mechanically connecting another of the first mating parts and the corresponding second mating part. The connecting assembly (16) includes a connecting rod (161), a first bolt (162) and a second bolt (163); the first bolt (162) passes through the first mating part along the optical axis, and the second bolt (163) passes through the second mating part along the optical axis. The two ends of the connecting rod (161) are respectively hinged to the first bolt (162) and the second bolt (163).

7. The shaft-holding mechanism for an optical axis according to claim 1, characterized in that, It also includes at least one centering component (17) for pairing the optical axis with the first transmission component (15). The centering assembly (17) includes a fixing part (171) mounted on the axial end face of the arc gear, and a set screw (172) that passes through the fixing part (171) radially along the optical axis and is movable radially. The end of the set screw (172) near the optical axis is used to abut against the circumferential surface of the optical axis.

8. A turning device, characterized in that, Includes a drive mechanism (2) and a bearing mechanism as described in any one of claims 1 to 7; The drive mechanism (2) is mechanically coupled with the first transmission component (15) of the shaft-holding mechanism (1) to drive the shaft-holding mechanism (1) together with the optical axis to rotate around the central axis of the optical axis.

9. The turning gear device according to claim 8, characterized in that, The turning device further includes a first slide rail (4), a base (3) that slides on the first slide rail (4), and a second slide rail (51) provided on the base (3). The first slide rail (4) extends along the axial direction of the optical axis; The second slide rail (51) extends in a direction perpendicular to the optical axis; The drive mechanism (2) is slidably connected to the second slide rail (51).

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