Turning gear for overhauling steam turbine

Abstract

The utility model discloses a steam turbine overhaul turning gear which comprises a motor, a speed reducer located on one side of the motor, a rotating shaft connected to the output end of the speed reducer and a box body located on one side of the speed reducer, the end, away from the speed reducer, of the rotating shaft extends into the box body, fixing blocks are fixedly connected to the two sides of the bottom end of the box body, and a cylinder is arranged in the box body. The cylinder is connected with the box body through a pushing mechanism; the outer side of the cylinder is fixedly connected with a driving gear in a sleeved mode, an inserting groove is formed in the side, close to the rotating shaft, of the cylinder, the end of the rotating shaft is inserted into the inserting groove, side blocks are fixedly connected to the two sides of the rotating shaft, side grooves matched with the side blocks are formed in the two side walls of the inserting groove, and the two side blocks are inserted into the two side grooves respectively. The cylinder and the driving gear can only move transversely and cannot rotate, so that the two side grooves correspond to the two side blocks all the time, time and energy do not need to be spent on alignment in the next use process, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to a steam turbine maintenance turning gear device, belonging to the technical field of maintenance turning gear devices. Background Art

[0002] Steam turbine, also known as steam turbine engine, is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle and becomes an accelerated airflow, which is then sprayed onto the blades, causing the rotor with blade rows to rotate and perform work externally. Steam turbine is the main equipment of modern thermal power plants, and is also used in metallurgical industry, chemical industry, and ship power devices. The maintenance turning device is a necessary auxiliary tool for the later maintenance of steam turbines, which can greatly improve the maintenance efficiency.

[0003] Patent No. CN213298062U discloses a turbine maintenance turning device, including a reducer, a motor, an outer box, a mounting plate, a transmission shaft, a T-shaped cylinder, a driving gear, a bearing, an opening and a connection mechanism. The utility model sets a connection mechanism on the inner side of the outer box, and drives the worm and the worm wheel to rotate by rotating the rotating rod, and the worm wheel drives the screw to rotate, so that the inner frame moves vertically under the drive of the screw, and the inner frame drives the driving gear to move vertically downward, and then the T-shaped latch can be pushed to move inward into the inside of the slot opened on the outside of the inner frame for fixation, thereby completing the assembly and fixation of the turning device. After use, the rotating rod can be rotated in the opposite direction to drive the inner frame and the driving gear to move upward and disengage from the large gear on the turbine, thereby achieving the beneficial effect of making the turning device more stably connected and detached from the large gear on the turbine.

[0004] However, this type of technology has a more complicated driving structure when pushing the driving gear. At the same time, since the cylindrical driving gear will rotate autonomously during the movement, it is not convenient for the protrusion on the outside of the shaft to be combined with the groove on the inner wall of the opening. Each time during the assembly process, it takes a certain amount of time to align, which is time-consuming and laborious. Utility Model Content

[0005] The utility model aims to provide a turbine maintenance turning device to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a turbine maintenance turning device, comprising a motor, a reducer located on one side of the motor, a rotating shaft connected to the output end of the reducer and a box body located on one side of the reducer, the rotating shaft extending into the box body at one end away from the reducer, fixed blocks are fixedly connected on both sides of the bottom end of the box body, a cylinder is provided in the box body, and the cylinder and the box body are connected by a pushing mechanism; a driving gear is fixedly sleeved on the outer side of the cylinder, a slot is provided on the side of the cylinder close to the rotating shaft, the end of the rotating shaft is inserted into the slot, side blocks are fixedly connected on both sides of the rotating shaft, side grooves matching the side blocks are provided on both side walls of the slot, and two side blocks are respectively inserted in the two side grooves.

[0007] Preferably, the pushing mechanism includes a rotating block, a screw rod, two fixed rods and a mounting block, the mounting block is rotatably connected to one side of the cylinder, one end of the screw rod is rotatably connected to the mounting block, the other end of the screw rod extends out of the box and is fixedly connected to the rotating block, fixed rods are provided on both sides of the screw rod, one end of the two fixed rods are fixedly connected to the mounting block, and the other ends of the two fixed rods extend out of the box.

[0008] Preferably, a positioning rod is fixedly connected to one side of the cylinder, and a plurality of positioning holes are provided on one side wall of the box body, and the plurality of positioning holes are all matched with the positioning rod.

[0009] Preferably, the distance between the positioning rod and the inner wall of the box body is smaller than the length of the rotating shaft inserted in the slot.

[0010] Preferably, the plurality of positioning holes are distributed in a circle, and the center of the circle formed by the plurality of positioning holes corresponds to the center of the cylinder.

[0011] Compared with the prior art, the beneficial effect of the utility model is that through the restriction of the positioning rod and the positioning hole, the cylinder and the driving gear can only move laterally and cannot rotate, so that the two side grooves always correspond to the two side blocks. The next time they are used, there is no need to spend time and energy to align them, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of the box of the utility model;

[0014] Figure 3 It is a right side structural schematic diagram of the utility model;

[0015] Figure 4 It is a schematic cross-sectional view of the connection between the transmission shaft and the cylinder of the utility model.

[0016] In the figure: 1. motor; 2. reducer; 3. housing; 4. rotating shaft; 5. driving gear; 6. cylinder; 7. pushing mechanism; 71. rotating block; 72. screw rod; 73. fixing rod; 74. mounting block; 8. side block; 9. side groove; 10. slot; 11. positioning rod; 12. positioning hole; 13. fixing block. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-4 The utility model provides a technical solution: a turbine maintenance turning device, comprising a motor 1, a reducer 2 located at one side of the motor 1, a rotating shaft 4 connected to the output end of the reducer 2 and a box body 3 located at one side of the reducer 2, the rotating shaft 4 extending into the box body 3 at one end away from the reducer 2, the bottom of the box body 3 is fixedly connected with a fixing block 13 on both sides, a cylinder 6 is arranged in the box body 3, and the cylinder 6 is connected to the box body 3 through a pushing mechanism 7; a driving gear 5 is fixedly sleeved on the outer side of the cylinder 6, and the cylinder 6 is close to the rotating shaft A slot 10 is provided on one side of 4, and the end of the rotating shaft 4 is inserted in the slot 10. Side blocks 8 are fixedly connected on both sides of the rotating shaft 4. Side grooves 9 adapted to the side blocks 8 are provided on the two side walls of the slot 10. The two side blocks 8 are respectively inserted in the two side grooves 9. Through the restriction of the positioning rod 11 and the positioning hole 12, the cylinder 6 and the driving gear 5 can only move laterally but cannot rotate, so that the two side grooves 9 always correspond to the two side blocks 8. The next time you use it, you don't need to spend time and energy to align it, which saves time and effort.

[0019] The pushing mechanism 7 includes a rotating block 71, a screw rod 72, two fixed rods 73 and a mounting block 74. The mounting block 74 is rotatably connected to one side of the cylinder 6. One end of the screw rod 72 is rotatably connected to the mounting block 74. The other end of the screw rod 72 extends out of the box body 3 and is fixedly connected to the rotating block 71. Fixed rods 73 are provided on both sides of the screw rod 72. One end of the two fixed rods 73 is fixedly connected to the mounting block 74. The other ends of the two fixed rods 73 extend out of the box body 3. The screw rod 72 is driven to rotate by the rotating block 71. The screw rod 72 is rotatably connected to the mounting block 74, and the mounting block 74 is restricted by the two fixed rods 73. Therefore, the mounting block 74 can only move laterally, which will push the cylinder 6 and the driving gear 5 to move laterally. A positioning rod is fixedly connected to one side of the cylinder 6 11. A plurality of positioning holes 12 are provided on one side wall of the box body 3, and the plurality of positioning holes 12 are all matched with the positioning rod 11. Due to the restriction of the positioning rod 11 and the positioning holes 12, the cylinder 6 and the driving gear 5 can only move laterally and cannot rotate; the distance between the positioning rod 11 and the inner wall of the box body 3 is less than the length of the shaft 4 inserted in the slot 10, ensuring that before the shaft 4 is completely separated from the slot 10, one end of the positioning rod 11 has been inserted into the corresponding positioning hole 12, thereby ensuring that the cylinder 6 and the driving gear 5 cannot rotate independently; the plurality of positioning holes 12 are distributed in a circle, and the center of the circle formed by the plurality of positioning holes 12 corresponds to the center of the cylinder 6, ensuring that the positioning rod 11 after maintenance can be combined with the corresponding positioning hole 12.

[0020] Specifically, when the utility model is used, the device is fixedly installed at a designated position on the steam turbine through the fixing block 13, and then the screw rod 72 is driven to rotate through the rotating block 71, and the screw rod 72 is rotatably connected with the mounting block 74, and the mounting block 74 is restricted by the two fixing rods 73, so the mounting block 74 can only move laterally, which will then push the cylinder 6 and the driving gear 5 to move laterally, and finally the rotating shaft 4 will be combined with the slot 10, and the two side blocks 8 will be combined with the two side grooves 9. At this time, the driving gear 5 is also meshed with the large gear on the steam turbine. Finally, the motor 1 is started through the external controller, and the motor 1 drives the reducer 2, and then the rotating shaft is used. 4 drives the driving gear 5 and the large gear on the turbine to rotate. After the maintenance is completed, the rotating block 71 is rotated in the opposite direction, and the cylinder 6 and the driving gear 5 are driven to move in the opposite direction through the screw rod 72, and the rotating shaft 4 is gradually separated from the slot 10. During this process, one end of the positioning rod 11 will be inserted into the corresponding positioning hole 12, and finally the rotating shaft 4 is completely separated from the slot 10. However, due to the restrictions of the positioning rod 11 and the positioning hole 12, the cylinder 6 and the driving gear 5 can only move horizontally and cannot rotate, so that the two side grooves 9 always correspond to the two side blocks 8. The next time you use it, you don’t need to spend time and energy to align it, which saves time and effort.

[0021] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0023] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steam turbine maintenance turning device, comprising a motor (1), a reducer (2) located on one side of the motor (1), a rotating shaft (4) connected to an output end of the reducer (2), and a housing (3) located on one side of the reducer (2), characterized in that: The end of the rotating shaft (4) away from the reducer (2) extends into the interior of the housing (3); fixed blocks (13) are fixedly connected to both sides of the bottom end of the housing (3); a cylinder (6) is provided in the housing (3); the cylinder (6) and the housing (3) are connected via a pushing mechanism (7); a driving gear (5) is fixedly sleeved on the outer side of the cylinder (6); a slot (10) is provided on the side of the cylinder (6) close to the rotating shaft (4); the end of the rotating shaft (4) is inserted into the slot (10); side blocks (8) are fixedly connected to both sides of the rotating shaft (4); side grooves (9) matching the side blocks (8) are provided on both side walls of the slot (10); two side blocks (8) are respectively inserted into the two side grooves (9).

2. A steam turbine maintenance turning device according to claim 1, characterized in that: The pushing mechanism (7) comprises a rotating block (71), a screw rod (72), two fixed rods (73) and a mounting block (74); the mounting block (74) is rotatably connected to one side of the cylinder (6); one end of the screw rod (72) is rotatably connected to the mounting block (74); the other end of the screw rod (72) extends out of the box (3) and is fixedly connected to the rotating block (71); fixed rods (73) are provided on both sides of the screw rod (72); one end of the two fixed rods (73) are fixedly connected to the mounting block (74); the other ends of the two fixed rods (73) extend out of the box (3).

3. A steam turbine maintenance turning device according to claim 1, characterized in that: A positioning rod (11) is fixedly connected to one side of the cylinder (6), and a plurality of positioning holes (12) are provided on a side wall of the box body (3), and the plurality of positioning holes (12) are all compatible with the positioning rod (11).

4. A steam turbine maintenance turning device according to claim 3, characterized in that: The distance between the positioning rod (11) and the inner wall of the box body (3) is smaller than the length of the rotating shaft (4) inserted into the slot (10).

5. A steam turbine maintenance turning device according to claim 3, characterized in that: The plurality of positioning holes (12) are distributed in a circular shape, and the center of the circle formed by the plurality of positioning holes (12) corresponds to the center of the cylinder (6).

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