High speed and high torque radial meshing gear type fully automatic turning device

Abstract

This invention discloses a high-speed, high-torque radial meshing gear-type fully automatic turning gear device, comprising a motor connected to a turning gear input set via a coupling, the turning gear input set being disposed in the turning gear housing; a transmission mechanism disposed in the turning gear housing and located below the input gear set; a turning gear engagement mechanism disposed in the turning gear housing, comprising an engagement cylinder disposed on one side of the turning gear housing, the piston rod of the engagement cylinder being connected to a shift fork rotating plate via a shift fork cylinder connecting rod, the shift fork rotating plate being connected to a shift fork shaft, the shift fork shaft being supported and mounted on both sides of the turning gear housing via bearings, the shift fork shaft being connected to an inner shift fork component, the inner shift fork component driving the turning gear engagement gear assembly to rotate along a fixed center, thereby engaging and disengaging with the turbine rotor gear, the shift fork shaft being provided with a spring return assembly; and a turning gear control system connected to an automatic locking mechanism and the turning gear engagement mechanism. This invention features high safety performance and is characterized by high speed, high torque, and fast disengagement speed.

Description

Technical Field

[0001] The invention relates to a high-speed, high-torque, radially meshing gear type fully automatic turning device. Background Art

[0002] The main function of the turbine turning device is to turn the shaft system of the turbine generator set before the unit is started or after it is shut down. The turning device must be engaged before the turbine is started to rotate the shaft system. After the unit is shut down, due to the temperature difference between the cylinder and the upper and lower parts of the flow-through part, the rotor will bend due to uneven heating in this uneven temperature field. In order to avoid this phenomenon, when the turbine is shut down, the turning device must be automatically engaged to allow the rotor to continue to rotate and make the temperature field around the rotor uniform until the metal temperature of the cylinder drops below 150°C.

[0003] The present invention aims to provide a high-speed, high-torque, radial meshing gear type fully automatic turning device which has the characteristics of high safety performance, high speed, high torque, fast disengagement speed and high efficiency. Summary of the invention

[0004] The object of the present invention is to provide a high-speed, high-torque, radial meshing gear type fully automatic turning device, which has high safety performance and has the characteristics of high speed, high torque, fast disengagement speed and high efficiency.

[0005] In order to solve the above technical problems, the present invention provides a high-speed and high-torque radial meshing gear type fully automatic turning device, which comprises:

[0006] A motor is installed on the top of the turning gear box through a motor bracket, a coupling is provided at the power output end of the motor, the coupling is connected to the turning gear input gear set, and the turning gear input gear set is provided in the turning gear box;

[0007] The transmission mechanism is arranged in the turning gear housing and is located below the input gear set, and includes a pinion rotating shaft horizontally installed in the turning gear housing through a transmission mechanism bearing assembly, the pinion rotating shaft is provided with a large spiral bevel gear connected to the turning gear input gear set and a pinion outputting power to the idler gear, the pinion rotating shaft is provided with a left gear bracket and a right gear bracket located on both sides of the pinion and rotatable around the pinion rotating shaft, a fixed distance pin is arranged between the left gear bracket and the right gear bracket, an idler gear shaft is arranged on the left gear bracket and the right gear bracket, an idler gear meshing with the pinion gear is installed on the idler gear shaft, and a shift fork force pin is arranged at the left gear bracket and the right gear bracket;

[0008] The turning gear meshing mechanism arranged on the turning gear box includes a meshing cylinder arranged on one side of the turning gear box, the cylinder piston rod of the meshing cylinder is connected to the turning fork rotating plate through the fork cylinder connecting rod, the turning fork rotating plate is connected to the fork shaft, the fork shaft is supported and installed on the two sides of the turning gear box through bearings, the fork shaft is connected to the inner fork member matched with the fork force pin shaft, the inner fork member drives the turning gear meshing gear assembly to rotate along the fixed center, so as to mesh and disengage with the turbine rotor gear, and the fork shaft is provided with a spring reset assembly;

[0009] An automatic locking mechanism disposed on the turning gear housing and used to lock the shift fork shaft;

[0010] The turning gear control system is connected to the automatic locking mechanism, the turning gear engagement mechanism and the frequency converter connected to the motor.

[0011] Furthermore, the turning gear input gear set includes: a turning gear input gear bearing assembly arranged on the turning gear housing and a small spiral bevel gear installed on the bearing assembly, and the upper part of the small spiral bevel gear is connected to the coupling.

[0012] Furthermore, the turning gear input gear bearing assembly includes: an input bearing seat arranged on the upper part of the turning gear housing, a bearing seat end cover installed on the upper part of the input bearing seat, a lower bearing installed on the lower part of the input bearing seat, and an upper bearing installed on the upper part of the input bearing seat. A bearing spacer located in the bearing seat is arranged between the lower bearing and the upper bearing, the upper end of the upper bearing is connected to the wear-resistant spacer, a skeleton oil seal is installed on the outside of the wear-resistant spacer, and an O-ring is installed on the inside of the wear-resistant spacer. The small spiral bevel gear shaft arranged in the bearing assembly passes through the lower bearing, the bearing spacer, the upper bearing, and the wear-resistant spacer in sequence, and the upper part of the small spiral bevel gear shaft is connected to the coupling through a second flat key.

[0013] Furthermore, the spring return assembly includes: the spring return assembly includes a limit plate, a bearing earring, a spring adjustment rod, an adjustment nut, a disengagement spring, a spring guide rod, and a support shaft. The support shaft is arranged on the turning gear housing, and the spring return assembly is fixed to the other side of the turning gear device housing (opposite the cylinder) through the support shaft. An eighth retaining ring is arranged at the end of the support shaft. The limit plate is connected to one end of the fork shaft, and the limit plate and the fork shaft are connected by internal and external splines. The limit plate is connected to the spring adjustment rod. A spring guide rod is arranged between the spring adjustment rod and the support shaft. The spring guide rod is equipped with a disengagement spring. An external threaded structure portion is arranged at the lower part of the spring adjustment rod, and an adjustment nut is installed on the external threaded structure portion.

[0014] Further, the meshing cylinder is provided with a first position switch and a second position switch;

[0015] The first position switch determines whether the turning gear is disengaged, and the second position switch is used to determine whether the turning gear is engaged.

[0016] Further, the automatic locking mechanism comprises:

[0017] A cylinder mounting plate disposed on the turning box body;

[0018] A locking pin cylinder is arranged on the cylinder mounting plate, and a locking pin block is installed at the end of the cylinder rod thereof, which can lock or unlock the rotating shaft of the shift fork (i.e., the shift fork shaft);

[0019] The lock pin cylinder is provided with an air inlet A for unlocking and an air inlet B for locking.

[0020] Furthermore, the turning gear box is provided with a shift fork rotating plate limiting mechanism, so as to limit the two rotation directions (clockwise and counterclockwise) of the shift fork rotating plate.

[0021] The present invention has the following beneficial effects:

[0022] (1) High speed: This cranking device is suitable for cranking a small steam turbine before starting, with a speed of 100 rpm.

[0023] (2) Large torque: Since the small steam turbine needs to drive the feed water pump, the required starting torque is large. The long-term rated operating torque of the turning device is 8000Nm.

[0024] (3) The disengagement speed is fast. During the turbine run-up process, if the turning gear device cannot be disengaged quickly, the turning gear device will be dragged in the reverse direction by the turbine, which can easily cause a major accident. The engagement mechanism can achieve a quick disengagement of the turning gear device in 0.5 seconds.

[0025] (4) High efficiency. Compared with the existing transmission mechanism using a worm gear and a gear combination, the transmission mechanism of the winch device adopts a pair of spiral bevel gears and a pair of spur gears, which greatly improves the mechanical efficiency. The transmission efficiency of the winch device can reach 98%.

[0026] (5) Fully automatic. The winching device has a fully automatic mode, which does not require manual operation. It can automatically determine the winching conditions, automatically open the safety pin, automatically engage flexibly, automatically adjust the engagement and winch, automatically and quickly disengage after the winching is completed, and automatically lock the safety pin after disengagement. The entire winching, disengaging, and locking functions do not require manual operation.

[0027] (6) Flexible starting: the turning motor adopts frequency conversion control, with large starting torque and small starting impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is the general assembly drawing of a high-speed, high-torque, radial meshing gear-type fully automatic turning device.

[0029] Figure 1a This is the front view of the high-speed, high-torque, radial meshing gear-type fully automatic turning device.

[0030] Figure 1b This is the rear view of a high-speed, high-torque, radial-meshing-gear, fully-automatic turning device.

[0031] Figure 1c This is the left view of the high-speed, high-torque radial meshing gear type fully automatic turning device.

[0032] Figure 1d This is the right view of the high-speed, high-torque radial meshing gear type fully automatic turning device.

[0033] Figure 1e It is a top view of a high-speed, high-torque, radial meshing gear-type fully automatic turning device.

[0034] Figure 1f This is a bottom view of a high-speed, high-torque, radial meshing gear-type fully automatic turning device.

[0035] Figure 1g It is a high-speed, high-torque, radial meshing gear type fully automatic turning device. Figure 1 .

[0036] Figure 1h It is a high-speed, high-torque, radial meshing gear type fully automatic turning device. Figure 2 .

[0037] Figure 1i The three-dimensional structure of the motor is omitted for the high-speed and high-torque radial meshing gear type fully automatic turning device Figure 1 .

[0038] Figure 1j The three-dimensional structure of the motor is omitted for the high-speed and high-torque radial meshing gear type fully automatic turning device Figure 2 .

[0039] Figure 1k In order to omit the schematic diagram of the internal structure of the turntable box, the tooth structure on the surface of the small spiral bevel gear, the large spiral bevel gear, etc. is omitted in this figure.

[0040] Figure 1l This is a diagram showing the coordination between the inner shift fork and the shifting shaft.

[0041] Figure 1m It is the installation diagram of the mechanical limit bolt in the meshing position and the disengagement limit bolt.

[0042] Figure 1n It is a partial schematic diagram of the spring return assembly.

[0043] Figure 2 Input gear group structure diagram for high speed and high torque radial meshing gear type fully automatic turning device.

[0044] Figure 3 It is a schematic diagram of the transmission mechanism in a high-speed, high-torque radial meshing gear type fully automatic turning device.

[0045] Figure 4 It is a schematic diagram of the meshing structure in a high-speed, high-torque radial meshing gear-type fully automatic turning device.

[0046] Figure 5 for Figure 4 HH section view.

[0047] Figure 6 This is a view of the locking position of the turning gear in a high-speed, high-torque radial meshing gear type fully automatic turning gear device.

[0048] Figure 7 This is a view of the unlocked position of the turning gear in a high-speed, high-torque radial meshing gear type fully automatic turning gear device. DETAILED DESCRIPTION

[0049] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments.

[0050] The embodiment of the present invention provides a high-speed, high-torque, radial meshing gear type fully automatic turning device, see Figure 1-7 , which includes: a coupling 3, a turning gear box 8, a motor 9, a transmission mechanism 14, a turning gear engagement mechanism 7, a locking mechanism, etc.

[0051] See also Figure 1-1h The motor 9 is installed on the top of the turning gear housing 8 through the motor bracket 11. The motor is in a vertical installation state. The motor seat of the turning gear motor 9 is fixed on the motor bracket 11 through the first bolt 1 and the first nut 2. A circular flange is provided at the bottom of the motor seat, and a circular flange is also provided at the top of the motor bracket, so that the bottom of the motor seat and the flange at the top of the motor bracket are connected and locked with bolts and nuts. The motor bracket 11 and the turning gear housing 8 are connected together through the second bolt 6 and the second nut 5. The bottom of the motor bracket is a square flange, and the top of the turning gear housing is also provided with a square flange, so that the motor bracket and the turning gear housing are locked by bolts and nuts. The locating pin 13 is used to fix the turning gear box 8 on the motor bracket 11. Matching locating pin mounting holes are arranged on the top of the turning gear box and the bottom of the motor bracket. When the locating pin 13 is inserted into the locating pin mounting hole, the installation and positioning between the turning gear box and the motor bracket can be quickly realized. The locating pin ensures the concentricity of the center hole between the two. A coupling 3 is arranged at the power output end of the motor. The coupling 3 is connected to the turning gear input gear set 12. The motor output shaft is connected to the turning gear input gear set 12 through the coupling 3, and the motor output shaft and the coupling are connected through a first flat key 10. A coupling elastomer 4 is arranged in the middle of the coupling 3. The coupling elastomer 4 can absorb the impact generated when the motor is started. The turning gear input gear set is arranged in the turning gear box 8.

[0052] exist Figures 1i-1j It can be seen that the top of the motor bracket is a circular flange, and the motor bracket is a box structure with a hollow cavity and upper and lower openings, and the hollow cavity 11b of the motor bracket is a square cavity, and the coupling and other components are arranged in the square cavity, and structural reinforcement ribs 11a are arranged on the four sides of the square cavity. The bottom of the motor bracket is a rectangular flange, and the rectangular flange is provided with positioning pin holes 11c. The positioning pin holes are arranged at two opposite corners of the rectangular flange and arranged on two adjacent sides of the rectangular flange corners. When arranging the positioning pin holes, it is necessary to ensure the concentricity of the motor bracket box and the turning gear box (on the same vertical axis) to facilitate the installation and precision requirements of subsequent equipment. Since the rectangular flange of the motor bracket box is arranged with positioning pin holes that match the positioning pins 13, the rectangular flange on the top of the turning gear box is also provided with matching positioning pin holes.

[0053] Figure 1k The internal structure of the turning gear box is shown in Figure 2It can be known that the turning gear input gear set 12 includes: a turning gear input gear bearing assembly arranged on the turning gear housing and a small spiral bevel gear 15 installed on the bearing assembly, the upper part of the small spiral bevel gear 15 is connected to the coupling 3, the turning gear input gear bearing assembly includes: an input bearing seat 18 arranged on the upper part of the turning gear housing, a bearing seat end cover 20 installed on the upper part of the input bearing seat 18, a lower bearing 16 installed on the lower part of the input bearing seat, and an upper bearing 29 installed on the upper part of the input bearing seat. A bearing spacer 17 located in the bearing seat is arranged between the lower bearing and the upper bearing, the upper end of the upper bearing is connected to a wear-resistant spacer 26, a skeleton oil seal is installed on the outside of the wear-resistant spacer 26, and an O-ring 21 is installed inside the wear-resistant spacer 26. The small spiral bevel gear shaft arranged in the bearing assembly passes through the lower bearing, the bearing spacer, the upper bearing, and the wear-resistant spacer in sequence, and the upper part of the small spiral bevel gear shaft is connected to the coupling 3 through a second flat key 22. The input gear set 12 composed of a small spiral bevel gear 15, an input bearing seat 18, a bearing seat end cover 20, an input shaft pressure plate 23, etc. transmits the power output by the motor 9 to the transmission mechanism 14. The lower bearing 16 is installed in the input bearing seat 18. The inner ring of the lower bearing 16 cooperates with the small spiral bevel gear shaft and is connected to the small spiral bevel gear step. The upper part of the lower bearing 16 is positioned by a bearing spacer 17. At the same time, the bearing spacer 17 is pressed against the inner ring of the upper bearing 29. The upper end of the inner ring of the upper bearing 29 is connected to the wear-resistant spacer 26. The wear-resistant spacer is sleeved on the small spiral bevel gear shaft, and the lower edge is pressed against the upper edge of the inner ring of the upper bearing 29. The coupling 3 is pressed against the upper edge of the wear-resistant spacer. The wear-resistant spacer 26 is provided with a skeleton oil seal 27 on the outside and an O-ring 21 on the inside. The upper part of the small spiral bevel gear is connected to the coupling 3 through the second flat key 22, and the top of the small spiral bevel gear is fixed by the input shaft pressure plate 23 in cooperation with the fourth bolt 24 and the first spring washer 25 (the input shaft pressure plate is to prevent the small spiral bevel gear from loosening after long-term use. If there is no input shaft pressure plate, the small spiral bevel gear will easily fall down after loosening. The diameter of the input shaft pressure plate at the top of the small spiral bevel gear shaft is larger than the small spiral bevel gear shaft, but the diameter of the inner cavity of the coupling used to install the input shaft pressure plate is larger than the outer diameter of the input shaft pressure plate. Therefore, after the coupling and the small spiral bevel gear shaft are connected through the second flat key, the input shaft pressure plate can have a lifting effect, thereby preventing the small spiral bevel gear from falling down), and the entire input gear set is fixed to the winch box 8 through the third bolt 28 on the bearing seat end cover 19, and a sealing gasket 19 is arranged between the bearing seat end cover 19 and the input bearing seat.

[0054] See also Figure 3, a transmission mechanism 14 is arranged in the turning gear housing 8 and located below the input gear group, which includes a pinion rotating shaft 32 horizontally installed in the turning gear housing through a transmission mechanism bearing assembly, the pinion rotating shaft 32 is provided with a large spiral bevel gear 40 connected to the turning gear input gear group 12 (the large spiral bevel gear 40 cooperates with the small spiral bevel gear 15) and a pinion 36 that outputs power to the idler gear, the pinion rotating shaft 32 is provided with a gear left side bracket 37 and a gear right side bracket 30 located on both sides of the pinion gear 36, a fixed distance pin shaft 50 is arranged between the gear left side bracket 37 and the gear right side bracket 30, the gear left side bracket 37 and the gear right side bracket 30 are provided with an idler gear shaft 31, and the idler gear shaft 31 is installed with an idler gear 34 meshing with the pinion gear 36. The transmission mechanism 14 composed of the right side support 30 of the gear, the pinion rotating shaft 32, the pinion 36, the left side support 37 of the gear, the large spiral bevel gear 40, the left pressure plate 42 of the pinion shaft, the front bearing seat 43, the fork force pin shaft 48 and the rear bearing seat, the right pressure plate 59 of the pinion shaft, etc. transmits the power of the turning gear input gear set to the meshing gear on the turbine shaft system. The pinion 36 is connected to the pinion rotating shaft 32 through the third flat key 53, and the large spiral bevel gear 40 is connected to the pinion rotating shaft 32 through the fourth flat key 41. The right side support 30 of the gear and the left side support 37 of the gear are respectively installed on the pinion rotating shaft 32 through the first bearing 38 and the second bearing 61 (so that the right side support 30 of the gear and the left side support 37 of the gear can rotate around the pinion rotating shaft 32, so that the inner fork member 82 can drive the fork force pin shaft 5 1), the first bearing 38 is provided with a first retaining ring 47 and a first bearing spacer 39, the second bearing 61 is provided with a second retaining ring 62 and a second bearing spacer 55, the right side bracket 30 of the gear and the left side bracket 37 of the gear are fixed at a distance by three spacing pins 50, the left and right sides of the spacing pins 50 are fixed to the left and right side plates of the gear (i.e. the right side bracket 30 of the gear and the left side bracket 37 of the gear) by means of a first screw 48 and a second spring washer 49, the idle gear shaft 31 is fixed to the left and right side plates of the gear (the left and right side plates of the gear refer to the right side bracket 30 of the gear and the left side bracket 37 of the gear) by means of a fifth bolt 63 and an idle gear plate 64, the idle gear 34 is installed on the idle gear shaft 31 by means of a third bearing 33 and a fourth bearing 35, and is meshed with the pinion. The fifth bearing 45 and the sixth bearing 60 are installed on the pinion rotating shaft 32, and are fixed by the pinion shaft left pressure plate 42 and the pinion shaft right pressure plate 59 and the sixth bolt 57 and the seventh bolt 43 thereon. The seventh bolt 43 is installed with the third spring washer 44, and the sixth bolt 57 is installed with the fourth spring washer 58, which are respectively installed on the left bearing seat 46 and the right bearing seat 56. The left bearing seat 46 and the right bearing seat 56 are installed on the turning gear box body through the bolts above.A shift fork force pin 51 is provided at the left side bracket 37 of the gear and the right side bracket 30 of the gear, and third retaining rings 52 are respectively installed at the two ends of the shift fork force pin 51 extending out of the left side bracket 37 of the gear and the right side bracket 30 of the gear, and a third bearing spacer 54 is provided between the second bearing 61 and the pinion 36.

[0055] See also Figure 4-5 , a barring gear meshing mechanism 7 is arranged on a barring gear housing 8, which includes a meshing cylinder 68 arranged on one side of the barring gear housing, a cylinder piston rod of the meshing cylinder 68 is connected to a fork rotating plate 76 through a fork cylinder connecting rod 70, the fork rotating plate 76 is connected to a fork shaft 83, the fork shaft 83 is mounted on two side surfaces of the barring gear housing through bearing support, a fifth retaining ring 77 is provided at one end of the fork shaft 83 for mounting the fork rotating plate 76, and the fork rotating plate 76 is mounted to the barring gear housing through a fixed shaft and a ninth bearing 75 ( Figure 5 The structure is shown at the lower part of the middle shift fork rotating plate 76, the shift fork shaft 83 is connected to the inner shift fork member 82 (the seventh retaining ring 81 is provided on both sides of the inner shift fork member 82), and the shift fork force pin shaft 51 cooperating with the inner shift fork member 82 is provided between the left side bracket 37 of the gear and the right side bracket 30 of the gear, and the inner shift fork member 82 drives the turning gear meshing gear assembly to rotate along the fixed center, thereby engaging and disengaging with the turbine rotor gear.

[0056] See also Figure 4 The meshing cylinder 68 is provided with a first position switch 73 and a second position switch 74, both of which are magnetic switches. The first position switch 73 determines whether the turning gear is disengaged, and the second position switch 74 determines whether the turning gear is meshed.

[0057] See also Figure 1d , Figure 5 , the turning gear housing is provided with a shift fork rotating plate limiting mechanism, and the limiting mechanism is connected to the turning gear control system. Since limiting the shift fork rotating plate also means limiting the shift fork shaft, the shift fork shaft 83 is provided with a limiting assembly as an example for explanation below, and the limiting assembly includes a limit switch and a mechanical limit bolt. The engaging cylinder 68 on the turning gear engagement mechanism is fixed to one side of the turning gear housing through a cylinder earring 66 and a cylinder mounting seat 65, and the cylinder piston rod of the engaging cylinder is connected to the shift fork rotating plate 76 through a shift fork cylinder connecting rod 70. The internal spline on the shift fork rotating plate 76 and the external spline on the shift fork shaft 83 are connected together, and the shift fork shaft 83 is connected through two bearings (i.e. Figure 5The seventh bearing 80 shown in the figure is supported and fixed on the two sides of the turning gear housing. The precise positioning of the shift fork shaft 83 is completed by two bearing steps (cooperating with two sixth retaining rings 79 for positioning). The inner shift fork member 82 is connected to the shift fork shaft 83 through internal and external splines. The inner shift fork member 82 rotates under the drive of the shift fork shaft 83. The rotation of the inner shift fork member 82 drives the turning gear meshing gear assembly to rotate along the fixed center (rotate along the center of the pinion shaft 41), thereby completing the meshing and disengagement with the turbine rotor gear. Figure 4 In the embodiment, the mechanical limit bolt 71 and the limit switch 72 are fixed on the limit mechanism bracket on one side of the turning gear box (the same side as the meshing cylinder). Figure 1m The mechanical limit bolt 71 can be seen in the figure, but the limit switch 72 is not shown. The limit switch 72 is fixed to the box limit bracket (that is, the bracket 71a for installing the mechanical limit bolt 71, Figure 4 The limit switch 72 is shown in FIG. 1 , and the limit switch 72 is omitted in other figures. When the turning gear device reaches the engaged position, the limit switch is triggered, and the limit switch sends an engaged position signal to the turning gear control system.

[0058] It should be noted that see Figure 4 When the limit switch 72 is set, the fork rotating plate 76 is provided with a protrusion 76' that cooperates with the limit switch 72. When the turning device reaches the engaged position, the limit switch is triggered by the protrusion 76', and the limit switch sends an engaged position signal. Figure 4 The mechanical limit bolt 71 in the meshing position is a mechanical limit bolt, which is used to fine-tune the meshing interval between the idler gear and the large gear. Figure 1m The disengagement limit bolt 71b is a mechanical limit bolt for the disengagement position of the turning gear device. Thus, the disengagement and engagement limit structure of the turning gear can limit it, avoiding damage to the equipment and danger caused by over-travel. The part of the fork rotating plate 76 connected to the engagement cylinder cooperates with the disengagement limit bolt 71b, and the part of the fork rotating plate 76 with the protrusion 76' cooperates with the mechanical limit bolt 71. The installation position of the two limit bolts is the maximum travel position of the fork rotating plate in counterclockwise and clockwise rotation.

[0059] See also Figure 1n and Figure 5The spring return assembly includes a limit plate 84 (L-shaped plate, the L-shaped plate has a fork shaft mounting hole), a bearing earring 87, a spring adjustment rod 89, an adjustment nut 90, a disengagement spring 91, a spring guide rod 92, and a support shaft 94. The support shaft 94 is arranged on the turning gear housing, and the spring return assembly is fixed to the other side of the turning gear housing (opposite to the cylinder) through the support shaft. The end of the support shaft is provided with an eighth retaining ring 93. The limit plate 84 is connected to one end of the fork shaft 83, and the limit plate 84 and the fork shaft 83 are connected by internal and external splines. 4 is connected to the spring adjustment rod 89, a spring guide rod 92 is arranged between the spring adjustment rod 89 and the support shaft 94, and a disengagement spring 91 is installed on the spring guide rod 92. An external thread structure is arranged at the lower part of the spring adjustment rod 89, and an adjustment nut 90 is installed on the external thread structure. Below the external thread structure of the spring adjustment rod 89 is a straight rod. The spring guide rod 92 has a mounting block located on the support shaft 94. The straight rod part of the spring adjustment rod 89 can move toward the spring guide rod direction. The disengagement spring is installed on the spring adjustment rod 89 and the spring guide rod 92. When the cylinder drives the shift fork shaft to rotate clockwise, the shift fork shaft drives the limit plate 84 to rotate clockwise synchronously. At this time, the turning device is meshed with the turbine rotor gear. When the shift fork shaft loses the cylinder force, the disengagement spring resets and drives the limit plate 84 to drive the shift fork shaft to rotate counterclockwise (see Figure 1n ), at this time the turning device can be disengaged from the turbine rotor gear to complete the resetting work.

[0060] It should be noted that Figure 5 The mounting block 92a of the middle spring guide rod 92 is mounted on the support shaft 94, and the spring guide rod can be spaced a certain distance from the straight rod of the spring adjustment rod, so that when the spring is disengaged and squeezed, the spring adjustment rod can move toward the spring guide rod. Of course, it can be further improved to set an inner guide hole in the spring guide rod, and the straight rod of the spring adjustment rod can enter the guide hole, so as to complete the movement of the spring adjustment rod away from or toward the spring guide rod ( Figure 5 This is the structure).

[0061] See also Figure 5, the fork shaft 83 is fixed on the turning gear box 8 through the seventh bearing 80, and the oil seal 78 and the sixth retaining ring 79 are installed at the seventh bearing 80. The limit plate 84 is connected to the fork shaft 83 through a spline, and the limit plate is positioned through the fourth retaining ring 85. The limit plate 84 is connected to the spring adjustment rod 89 through the first pin 88. The two ends of the first pin 88 extending out of the spring adjustment rod are sleeved with retaining rings. The first pin 88 is equipped with an eighth bearing 86 (the eighth bearing is provided with bearing earrings 87 sleeved on the first pin on both sides), which can meet the relative rotation of the limit plate. The spring adjustment rod 89 is threaded and equipped with an adjustment nut 90 for the compression amount of the disengagement spring 91. The disengagement spring 91 is equipped with a spring guide rod 92 inside to prevent the disengagement spring 91 from generating radial bending during the compression process. The spring guide rod 92 is connected to the spring rotation support shaft 94 through a pin, and the support shaft 94 is fixed to the turning gear box through a thread.

[0062] A further improvement of the present invention is that, see Figure 6 The cylinder mounting plate 101 is welded to the turning box 8, for example, the turning box is located on the lower surface of the turning box flange above the limit plate 84, or the cylinder mounting plate 101 is directly welded to the side wall of the turning box (the side of the turning box adjacent to the disengagement spring), the cylinder mounting plate 101 is horizontally installed, the locking pin cylinder 99 is installed on the cylinder mounting plate 101 by two fixing screws 100, the cylinder piston of the locking pin cylinder 99 is equipped with a locking pin block 97, and a protrusion ( Figure 6 The contact portion below the locking pin block 97 is the protrusion), and when the locking pin hole 97 locks the protrusion, the fork shaft cannot rotate. Figure 6 The position is the turning gear locking position, at which the shift fork rotating shaft is locked and cannot rotate, to ensure that the meshing gear of the turning gear device and the turbine rotor gear are in a separated state. Figure 7 The position is the unlocked state of the turning gear. At this time, the shift fork rotating shaft can be driven by the meshing cylinder to rotate in the counterclockwise direction shown in the figure, and the meshing of the turning gear of the turning gear and the turbine rotor gear can be completed. The first magnetic switch 98 and the second magnetic switch 102 are installed on the locking pin cylinder. When the turning gear is locked, the first magnetic switch 98 is activated (the second magnetic switch 102 is in an inactive state at this time), and a turning gear locking signal is sent to the power plant DCS (distributed control system). At the same time, in the turning gear control system, the logical negation of this signal is used as a necessary condition for the turning gear engagement, that is, the turning gear cannot engage when the turning gear is in the locked position. When the turning gear is unlocked ( Figure 7 ), the second magnetic switch 102 is activated, sending a crank unlocking signal to the DCS, and the crank control system allows the crank device to engage. The ninth retaining ring 96 is installed on the fork shaft 83 to stop the limit plate 84.

[0063] A turning gear control system, such as a PLC controller, is connected to the automatic locking mechanism and the turning gear engagement mechanism. Of course, the turning gear control system can also be connected to the frequency converter, the power plant DCS, and the steam turbine MEH. The frequency converter is installed in the turning gear control cabinet. The frequency converter is connected to the motor and is used for starting and frequency conversion speed regulation of the motor. The turning gear electrical control cabinet receives signals from the power plant DCS and the steam turbine MEH. The control system processes the received signals, sends out a turning gear action signal, and feeds back the status of the turning gear device to the power plant DCS.

[0064] Fully automatic cranking process: When the turbine rotor needs to be cranked, the cranking control system receives the full automatic cranking command, at which time the locking pin cylinder solenoid valve is energized, and the air source enters the cylinder through the air inlet A103 of the locking pin cylinder, and the cylinder piston drives the locking pin block to retract quickly. Figure 7 position, completing the unlocking of the turning gear device. At the same time, the second magnetic switch 102 is activated, sending a turning gear unlocking signal to the DCS. The control system receives the logical negation signal of the first magnetic switch 98, the meshing condition is met, the meshing cylinder solenoid valve is energized, and the compressed air enters the cylinder through the second speed regulating valve 69. The intake speed is adjusted by the second speed regulating valve 69, and the cylinder piston rod slowly contracts, driving the shift fork rotating plate to rotate clockwise. Since the shift fork shaft and the shift fork rotating plate are connected by a spline, the shift fork shaft also rotates clockwise. At this time, the inner shift fork member rotates clockwise driven by the shift fork shaft, thereby driving the turning gear meshing gear assembly to mesh with the turbine rotor gear (the idler gear of the turning gear meshing gear assembly meshes with the turbine rotor gear). When the meshing is in place, the shift fork rotating plate is pressed just on the mechanical limit nut to prevent over-engagement of the gear. At the same time, the second position switch 74 on the cylinder ( Figure 4 The second position switch 74 is a magnetic switch) and the limit switch 72 send an engagement signal to the cranking control system. After receiving the engagement signal, the cranking control system waits for 5 seconds, and then the cranking control system sends a start command, and the cranking device starts to run. When the turbine rotor is wound up and reaches the rated speed, the turbine is ready to run. At this time, the turbine regulating valve is opened, and the turbine MEH sends a GO signal to the cranking control system. The cranking disengagement condition is met, and the compressed air enters the cylinder (engagement cylinder 68) through the first speed regulating valve 67. The intake speed is adjusted by the first speed regulating valve 67, and the piston rod is quickly extended, driving the shift fork rotating plate to rotate counterclockwise. Driven by the shift fork shaft, the inner shift fork member drives the meshing gear assembly to disengage quickly. After disengagement, the first position switch 73 ( Figure 4 The first position switch is a magnetic switch. The first position switch 73 determines whether the turning gear is disengaged and the second position switch 74 determines whether the turning gear is engaged. The turning gear sends a disengaged signal to the turning gear control system. At this time, the electromagnetic valve of the locking pin cylinder of the turning gear device loses power, and the air source enters the cylinder through the air inlet B104 of the locking pin cylinder. The cylinder piston drives the locking pin block to extend quickly to Figure 6 position to complete the locking of the turning device.

[0065] Automatic adjustment during the meshing process: If the turning gear and the turbine rotor gear encounter a tooth collision during the meshing process, the turning control system will reset the meshing cylinder solenoid valve, that is, the meshing cylinder solenoid valve loses power, and the compressed air enters the meshing cylinder through the first speed regulating valve 67, and the turning gear is disengaged. When the turning gear is disengaged in place, the magnetic switch on the meshing cylinder (i.e., the first position switch 73) is activated, and a disengagement signal is sent to the turning control system. After receiving the disengagement signal, the turning control system sends a pulse command to the turning motor to rotate the motor, driving the turning gear meshing gear to rotate half a tooth angle, and then the control system activates the meshing cylinder solenoid valve again to make a second meshing attempt. If the second meshing process still encounters a tooth collision, the turning control system will repeat the above adjustment actions and then try the third meshing.

[0066] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A high-speed, high-torque radial meshing gear type fully automatic turning device, characterized in that: It includes: A motor is installed on the top of the turning gear housing through a motor bracket, a coupling is provided at the power output end of the motor, the coupling is connected to the turning gear input gear set, and the turning gear input gear set is provided in the turning gear housing; The transmission mechanism is arranged in the turning gear housing and is located below the input gear set, and includes a pinion rotating shaft horizontally installed in the turning gear housing through a transmission mechanism bearing assembly, the pinion rotating shaft is provided with a large spiral bevel gear connected to the turning gear input gear set and a pinion that outputs power to the idler gear, the pinion rotating shaft is provided with a left gear bracket and a right gear bracket located on both sides of the pinion gear and rotatable around the pinion rotating shaft, a fixed distance pin is arranged between the left gear bracket and the right gear bracket, an idler gear shaft is arranged on the left gear bracket and the right gear bracket, an idler gear meshing with the pinion gear is installed on the idler gear shaft, and a shift fork force pin is arranged at the left gear bracket and the right gear bracket; A turning gear meshing mechanism arranged on a turning gear housing comprises a meshing cylinder arranged on one side of the turning gear housing, a cylinder piston rod of the meshing cylinder is connected to a turning fork rotating plate through a fork cylinder connecting rod, the turning fork rotating plate is connected to a fork shaft, the fork shaft is supported and mounted on two sides of the turning gear housing through bearings, the fork shaft is connected to an inner fork member matched with a fork force pin shaft, the inner fork member drives the turning gear meshing gear assembly to rotate along a fixed center, thereby meshing and disengaging with a turbine rotor gear, and the fork shaft is provided with a spring reset assembly; An automatic locking mechanism disposed on the turning gear housing and used to lock the shift fork shaft; A turning gear control system connected to the automatic locking mechanism, the turning gear engagement mechanism and a frequency converter connected to the motor; The turning gear input gear set comprises: a turning gear input gear bearing assembly arranged on the turning gear housing and a small spiral bevel gear installed on the bearing assembly, wherein the upper part of the small spiral bevel gear is connected to the coupling; The spring return assembly comprises: the spring return assembly comprises a limit plate, a bearing earring, a spring adjustment rod, an adjustment nut, a disengagement spring, a spring guide rod, and a support shaft, wherein the support shaft is arranged on the turning gear housing, the spring return assembly is fixed to the other side of the turning gear housing through the support shaft, an eighth retaining ring is arranged at the end of the support shaft, the limit plate is connected to one end of the fork shaft, and the limit plate and the fork shaft are connected through internal and external splines, the limit plate is connected to the spring adjustment rod, a spring guide rod is arranged between the spring adjustment rod and the support shaft, a disengagement spring is installed on the spring guide rod, an external thread structure portion is arranged at the lower part of the spring adjustment rod, and an adjustment nut is installed on the external thread structure portion; The automatic locking mechanism comprises: A cylinder mounting plate disposed on the turning box body; A locking pin cylinder is arranged on the cylinder mounting plate, and a locking pin block capable of locking or unlocking the fork shaft is installed at the end of the cylinder rod; The locking pin cylinder is provided with an air inlet A for unlocking and an air inlet B for locking; The upper part of the small spiral bevel gear is connected to the coupling through the second flat key, and the top of the small spiral bevel gear is fixed through the input shaft pressure plate, the fourth bolt and the first spring washer.

2. The high-speed, high-torque, radial meshing gear type fully automatic turning device according to claim 1 is characterized in that: The turning gear input gear bearing assembly includes: an input bearing seat arranged on the upper part of the turning gear housing, a bearing seat end cover installed on the upper part of the input bearing seat, a lower bearing installed on the lower part of the input bearing seat, and an upper bearing installed on the upper part of the input bearing seat. A bearing spacer located in the bearing seat is arranged between the lower bearing and the upper bearing, and the upper end of the upper bearing is connected to a wear-resistant spacer, a skeleton oil seal is installed on the outside of the wear-resistant spacer, and an O-ring is installed inside the wear-resistant spacer. The small spiral bevel gear shaft arranged in the bearing assembly passes through the lower bearing, the bearing spacer, the upper bearing, and the wear-resistant spacer in sequence, and the upper part of the small spiral bevel gear shaft is connected to the coupling through a second flat key.

3. The high-speed, high-torque, radial meshing gear type fully automatic turning device according to claim 1 is characterized in that: The meshing cylinder is provided with a first position switch and a second position switch; The first position switch determines whether the barring gear is disengaged in place, and the second position switch is used to determine whether the barring gear is engaged in place.

4. The high-speed, high-torque, radial meshing gear type fully automatic turning device according to claim 1 is characterized in that: The turning gear box body is provided with a shift fork rotating plate limiting mechanism.

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