A multi-drive transmission and method for online replacement of high speed gears

Abstract

A kind of multi-drive transmission device and method of high-speed gear replacement online, including low-speed gear and multiple groups for driving low-speed gear rotation drive assembly, drive assembly is evenly spaced along the circumference of low-speed gear, drive assembly includes gear shaft and high-speed gear capable of being engaged with low-speed gear, gear shaft is screwed with high-speed gear, the thread on gear shaft, can make gear shaft stop, high-speed gear on it rotates with low-speed gear and gradually disengages from the engagement with low-speed gear;The end face of high-speed gear away from the end face of disengagement direction is rotatably connected with multiple uniformly distributed pushers along its circumference, and torsion spring is arranged between the pusher and high-speed gear, and the pusher on the high-speed gear is contacted with low-speed gear by inertia after the high-speed gear is replaced and the gear shaft is started, so that the rotation speed of high-speed gear gradually increases and moves in the direction of screwing of gear shaft by force, the present application, and operation is simple, and the investment of material and manpower is reduced.

Description

Technical Field

[0001] This invention relates to the field of mechanical transmission technology, specifically to a multi-drive transmission device and method for online replacement of high-speed gears. Background Technology

[0002] High-speed-ratio (1:5 to 50) multi-drive transmissions are widely used in nuclear power plants, serving as critical components of the system. These transmissions consist of a low-speed gear (large-diameter gear) and multiple drive assemblies that rotate it. These drive assemblies are evenly spaced around the low-speed gear. Each drive assembly includes a gear shaft and a high-speed gear (small-diameter gear) coaxial with it. The high-speed gear meshes with the low-speed gear, driving its rotation. However, these high-speed-ratio multi-drive transmissions are prone to damage during operation, especially the high-speed gears. Damage to any high-speed gear necessitates immediate replacement. Currently, damage to any high-speed gear in a drive assembly requires shutting down the entire nuclear power system for replacement. This system-wide shutdown due to replacing a single component not only impacts system efficiency but also consumes significant manpower and resources.

[0003] In conclusion, it is essential to study online replacement of driver components. Summary of the Invention

[0004] To address the problem of low work efficiency caused by downtime for replacing drive components in existing technologies, this invention provides a multi-drive transmission device and method for online replacement of high-speed gears. Under normal system operation, drive components can be replaced online, and the operation is simple, reducing the input of material and human resources.

[0005] To achieve the above objectives, the specific solution adopted by the present invention is as follows: a multi-drive transmission device for online replacement of high-speed gears, comprising a low-speed gear and multiple sets of drive components for driving the low-speed gear to rotate. The drive components are evenly spaced along the circumference of the low-speed gear. Each drive component includes a gear shaft and a high-speed gear capable of meshing with the low-speed gear. The gear shaft and the high-speed gear are threaded together. The thread on the gear shaft allows the high-speed gear to rotate with the low-speed gear and gradually disengage from the low-speed gear after the gear shaft stops. Multiple paddles are rotatably connected to the end face of the high-speed gear opposite to the disengagement direction, evenly spaced along its circumference. A torsion spring is provided between the paddles and the high-speed gear. After the gear shaft is started, the replaced high-speed gear, by inertia, causes the paddles on the high-speed gear to contact the low-speed gear, causing the high-speed gear to gradually increase its rotational speed and move along the thread tightening direction of the gear shaft, thereby achieving meshing between the high-speed gear and the low-speed gear.

[0006] As an optimized solution for the above-mentioned online high-speed gear replacement multi-drive transmission device: the end face of the high-speed gear opposite to the disengagement direction is coaxially fixedly connected to an annular limiting plate, and there is a receiving space between the annular limiting plate and the end face, with the paddle located in the receiving space.

[0007] As another optimized solution for the above-mentioned multi-drive transmission device for online high-speed gear replacement: the diameter of the annular limiting plate is smaller than the root circle diameter of the high-speed gear.

[0008] As another optimized solution for the above-mentioned multi-drive transmission device for online replacement of high-speed gears: the end face of the high-speed gear is fixedly connected to a fixing pin, the axis of the fixing pin is parallel to the axis of the high-speed gear, the fixing pin is rotatably connected to the paddle, and a torsion spring is sleeved on the fixing pin.

[0009] As another optimized solution for the above-mentioned multi-drive transmission device for online high-speed gear replacement: the paddle extends in a direction perpendicular to the axis of the fixed pin, and the paddle has a contact end and a distance end on both sides of the fixed pin. The distance between the contact end and the axis of the high-speed gear is greater than the distance between the distance end and the axis of the high-speed gear.

[0010] As another optimized solution for the above-mentioned multi-drive transmission device for online high-speed gear replacement: a baffle is detachably provided at the end of the gear shaft along the disengagement direction.

[0011] A method for online high-speed gear replacement, based on the aforementioned multi-drive transmission device for online high-speed gear replacement, characterized by comprising the following steps:

[0012] S1, the gear shaft stops rotating, the low-speed gear drives the high-speed gear to rotate and move along the gear shaft until the high-speed gear disengages from the low-speed gear;

[0013] S2, change the high-speed gear to the initial position, where the paddle is 0.1-0.3mm away from the low-speed gear;

[0014] S3, start the gear shaft to reach the required speed within 2 seconds. The gear shaft is in an unloaded state and its speed ratio with other gear shaft speeds is 101-102:100. The high-speed gear moves along the gear shaft due to inertia, causing the paddle to contact the low-speed gear, thereby causing the high-speed gear and the low-speed gear to initially mesh.

[0015] S4, the gear shaft continues to rotate, the low-speed gear drives the high-speed gear to rotate and move along the gear shaft until the high-speed gear and the low-speed gear are fully meshed.

[0016] As an optimization of the above-mentioned method for online replacement of high-speed gears: in S2, the initial position is 0.2mm away from the low-speed gear.

[0017] As an alternative optimization of the above-mentioned method for online replacement of high-speed gears: in S3, the maximum torsional height of the paddle is located between the pitch circle of the high-speed gear and half of the tooth tip height.

[0018] As another optimization of the above-mentioned method for online replacement of high-speed gears: in S4, the ratio of the rotational speed of the gear shaft to the rotational speed of other gear shafts is 101-102:100, and the rotational speed of the high-speed gear is equal to the rotational speed of other gear shafts.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a multi-drive transmission device for online replacement of high-speed gears. When disassembling the high-speed gear to be replaced, the drive source of the drive component is turned off, the gear shaft stops rotating, and the high-speed gear on it rotates with the low-speed gear and gradually disengages from the low-speed gear. The replaced high-speed gear is installed in the initial position of the gear shaft, the drive source is started to make the gear shaft rotate, and the inertia causes the paddle on the high-speed gear to contact the low-speed gear. The contact between the paddle and the low-speed gear ensures sufficient tooth backlash, which facilitates the initial meshing of the high-speed gear and the low-speed gear. At this time, the high-speed gear is in an unloaded state, and the low-speed gear drives the high-speed gear to rotate and move along the gear shaft until the low-speed gear and the high-speed gear are fully meshed. This allows for online replacement of high-speed gears, improves work efficiency, and is simple to operate, reducing the input of material and manpower. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the driver component;

[0022] Figure 3 This is a longitudinal sectional view of the driving component;

[0023] Figure 4 This is a cross-sectional view of the driving component;

[0024] Figure 5 This is a schematic diagram showing the contact between the paddle and the low-speed gear.

[0025] Reference numerals: 1. Low-speed gear, 2. High-speed gear, 201. Annular limiting plate, 202. Accommodation space, 203. Internal thread, 204. Limiting pin, 205. Mounting hole, 3. Gear shaft, 301. Threaded section, 302. Baffle, 4. Paddle, 401. Fixing pin. Detailed Implementation

[0026] The technical solution of the present invention will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of the present invention should be understood as prior art known or should be known by those skilled in the art, such as the connection between the drive source and the gear shaft 3, the installation of the gear shaft 3, the installation of the torsion spring, etc.

[0027] Example 1

[0028] A multi-drive transmission device for online high-speed gear replacement includes a low-speed gear 1 and multiple sets of drive components for driving the low-speed gear 1 to rotate. The number of drive components is 3-6; in this embodiment, there are 3 drive components, evenly spaced along the circumference of the low-speed gear 1. Each drive component includes a gear shaft 3 and a high-speed gear 2 capable of meshing with the low-speed gear 1. The gear shaft 3 and the high-speed gear 2 are threaded together. The axis of the gear shaft 3 is parallel to the axis of the low-speed gear 1, and the axis of the high-speed gear 2 coincides with the axis of the gear shaft 3. Figure 1 As shown, the gear shaft 3 includes a threaded section 301, an intermediate section, and a connecting section integrally connected from left to right. The connecting section is connected to a drive source for driving its rotation. The intermediate section has a stepped structure. The large-diameter end of the intermediate section is connected to the connecting section, and the small-diameter end of the intermediate section is connected to the threaded section 301. In this embodiment, the diameter of the threaded section 301 is smaller than the diameter of the small-diameter end of the intermediate section, so that a shoulder is formed at the connection between the threaded section 301 and the small-diameter end. The inner sidewall of the high-speed gear 2 is provided with an internal thread 203 that mates with the threaded section 301.

[0029] like Figure 1 As shown, in this embodiment, the high-speed gear 2 rotates clockwise, meaning the high-speed gear 2 drives the low-speed gear 1 to rotate counterclockwise. When the high-speed gear 2 in one of the drive components is damaged and needs to be replaced, the drive source of that drive component is turned off, causing the gear shaft 3 to stop rotating. The low-speed gear 1 continues to rotate counterclockwise under the drive of the other two drive components. The thread on the gear shaft 3 allows the high-speed gear 2 to rotate with the low-speed gear 1 and gradually disengage from the low-speed gear 1 after the gear shaft 3 stops. Specifically, after the gear shaft 3 stalls, the high-speed gear 2 is still engaged with the low-speed gear 1. The low-speed gear 1 is the driving gear, and the high-speed gear 2 is the driven gear. At this time, the high-speed gear 2 rotates clockwise, and the gear shaft 3 stops rotating. A speed difference is formed between the high-speed gear 2 and the gear shaft 3, meaning the low-speed gear 1 drives the high-speed gear 2 to rotate and move along the gear shaft 3, thus achieving automatic disengagement of the high-speed gear 2.

[0030] The high-speed gear 2 has multiple paddles 4 evenly spaced along its circumference rotatably connected to its end face facing away from the disengagement direction, such as... Figure 1As shown, the paddle 4 is disposed on the right end face of the high-speed gear 2. There are 2-4 paddles 4; in this embodiment, there are 3 paddles 4, evenly spaced along the axial direction of the high-speed gear 2. A torsion spring is provided between the paddle 4 and the high-speed gear 2, specifically, as shown... Figure 3 As shown, multiple fixing pins 401 are fixedly connected to the end face of the high-speed gear 2. The number of fixing pins 401 is the same as the number of levers 4. The axis of the fixing pin 401 is parallel to the axis of the high-speed gear 2, and the fixing pin 401 is rotatably connected to the lever 4. In this embodiment, a torsion spring is sleeved on the fixing pin 401. Specifically, one end of the torsion spring is fixedly connected to the fixing pin 401, and the other end of the torsion spring is connected to the lever 4. Multiple mounting holes 205 corresponding to the fixing pins 401 are opened on the end face of the high-speed gear 2. One end of the fixing pin 401 extends into the mounting hole 205 and is interference-fitted with the mounting hole 205. The other end of the fixing pin 401 extends out of the mounting hole 205 and is rotatably connected to the corresponding lever 4. Figure 4 As shown, the paddle 4 extends in a direction perpendicular to the axis of the fixed pin 401, and has a contact end and a distance end on both sides of the fixed pin 401. The distance between the contact end and the axis of the high-speed gear 2 is greater than the distance between the distance end and the axis of the high-speed gear 2. The torsion spring keeps the contact end of the paddle 4 between the pitch circle and half the addendum of the high-speed gear 2, ensuring that the contact end of the paddle 4 can contact the low-speed gear 1. Figure 4 Taking the uppermost paddle 4 as an example, paddle 4 extends from left to right, with the right end being the contact end and the left end being the distance end. Paddle 4 has a recessed area, within which a torsion spring is located. The torsion spring presses the distance end of paddle 4 towards the center of the high-speed gear 2. The distance between the contact end and the axis of the high-speed gear 2 is greater than the distance between the distance end and the axis of the high-speed gear 2. Furthermore, the contact end of paddle 4 is located between the pitch circle and half the addendum of the high-speed gear 2, ensuring that the contact end of paddle 4 can contact the low-speed gear 1. A limiting pin 204 corresponding to paddle 4 is fixedly connected to the end face of the high-speed gear 2. The limiting pin 204 can abut against the contact end of paddle 4, limiting the limit torsional angle of the contact end.

[0031] After the gear shaft 3 is started, the gear shaft 3 rotates clockwise, the low-speed gear 1 rotates counterclockwise, and the high-speed gear 2 moves along the screw tightening direction of the gear shaft 3 due to inertia, so that the paddle 4 can contact the low-speed gear 1, so that the speed of the high-speed gear 2 gradually increases and moves along the screw tightening direction of the gear shaft 3 with the help of force, so that the high-speed gear 2 and the low-speed gear 1 mesh. The rotational speed of high-speed gear 2 is less than that of gear shaft 3, meaning there is a speed difference between high-speed gear 2 and gear shaft 3. During the rotation of high-speed gear 2, the paddle 4 can contact low-speed gear 1, increasing the rotational speed of high-speed gear 2. Specifically, low-speed gear 1 contacts the contact end and presses it towards the center of high-speed gear 2 until the contact end contacts the limit pin 204. Low-speed gear 1 continues to rotate, driving high-speed gear 2 to rotate, thereby increasing the rotational speed of high-speed gear 2, i.e., reducing the speed difference between high-speed gear 2 and gear shaft 3, and thus reducing the speed at which high-speed gear 2 moves along gear shaft 3, allowing high-speed gear 2 to slowly mesh with low-speed gear 1. At the same time, it reduces the speed difference between high-speed gear 2 and other gear shafts 3, preventing tooth knocking when high-speed gear 2 and low-speed gear 1 initially mesh.

[0032] This invention enables online replacement of the high-speed gear 2 without shutting down the machine, improving work efficiency and simplifying operation while reducing the investment of material and human resources.

[0033] The above are the basic embodiments of the present invention. Further improvements, optimizations, and limitations can be made based on the above to obtain the following embodiments:

[0034] Example 2

[0035] This embodiment is an improved scheme of a multi-drive transmission device for online replacement of high-speed gear 2 based on embodiment 1. Its main structure is the same as that of embodiment 1, the improvement being that: an annular limiting plate 201 is coaxially fixedly connected to the end face of the high-speed gear 2 facing away from the disengagement direction. Figure 3 As shown, there is a receiving space 202 between the annular limiting plate 201 and the end face, and the paddle 4 is located in the receiving space 202. The annular limiting plate 201 can abut against the shaft shoulder to limit the extreme displacement of the high-speed gear 2 and ensure that the high-speed gear 2 and the low-speed gear 1 are fully meshed.

[0036] The diameter of the annular limiting plate 201 is smaller than the root circle diameter of the high-speed gear 2. This prevents the annular limiting plate 201 from colliding with the low-speed gear 1 when the high-speed gear 2 automatically disengages or engages.

[0037] Example 3

[0038] This embodiment is an improved scheme of a multi-drive transmission device for online replacement of high-speed gear 2 based on embodiment 1. Its main structure is the same as that of embodiment 1. The improvement is that a baffle 302 is detachably provided at the end of the gear shaft 3 along the disengagement direction to limit the extreme displacement of the high-speed gear 2. When it is necessary to replace the high-speed gear 2, it is removed.

[0039] Example 4

[0040] A method for online replacement of high-speed gear 2, as described in Embodiment 1 of a multi-drive transmission device for online replacement of high-speed gear 2, includes the following steps:

[0041] S1, when one of the high-speed gears 2 is damaged, the drive source of the drive component is turned off, causing the corresponding gear shaft 3 to stop rotating. At this time, the other two sets of drive components drive the low-speed gear 1 to rotate counterclockwise. In the drive component that has stopped working, the low-speed gear 1 is the driving gear and the high-speed gear 2 is the driven gear. That is, the low-speed gear 1 drives the high-speed gear 2 to rotate. Since the high-speed gear 2 and the gear shaft 3 are threadedly connected, the low-speed gear 1 drives the high-speed gear 2 to rotate and move along the gear shaft 3. The paddle 4 will not collide with the low-speed gear 1 until the high-speed gear 2 disengages from the low-speed gear 1, thus achieving automatic disengagement of the high-speed gear 2.

[0042] S2, remove the damaged high-speed gear 2 and replace it with a new high-speed gear 2. Rotate the high-speed gear 2 counterclockwise to move it closer to the low-speed gear 1 until the high-speed gear 2 reaches the initial position. The initial position is when the paddle 4 is 0.1-0.3mm away from the low-speed gear. In this embodiment, the initial position is when the paddle 4 is 0.2mm away from the low-speed gear.

[0043] S3, start the gear shaft 3 to reach the required speed within 2 seconds. Even if the gear shaft 3 reaches the required speed in a short time and the drive component is in an unloaded state at this time, the ratio of the speed of the gear shaft 3 to the speed of other gear shafts 3 is 101-102:100. Due to the sudden rotation of gear shaft 3, high-speed gear 2 moves along the thread tightening direction of gear shaft 3 due to inertia, that is, high-speed gear 2 moves towards low-speed gear 1, thereby enabling the paddle 4 to contact low-speed gear 1. Gear shaft 3 continues to rotate. At this time, because there is lubricating oil between high-speed gear 2 and gear shaft 3, the rotational speed of high-speed gear 2 is less than the rotational speed of gear shaft 3, that is, there is a speed difference between the two, which causes high-speed gear 2 to continue to move along the thread tightening direction of gear shaft 3. When high-speed gear 2 rotates to the point where paddle 4 contacts low-speed gear 1, low-speed gear 1 presses the contact end of paddle 4 against the center of high-speed gear 2 until the contact end abuts against limit pin 204. The continued rotation of low-speed gear 1 can drive high-speed gear 2 to increase its rotational speed, that is, reduce the speed difference between high-speed gear 2 and all gear shafts 3, slow down the movement speed of high-speed gear 2 along the thread tightening direction of gear shaft 3, and reduce the speed difference between high-speed gear 2 and other gear shafts 3, thus avoiding the phenomenon of tooth grinding when it meshes with low-speed gear 1. The paddle 4 alternately contacts the low-speed gear 1 to make the high-speed gear 2 gradually increase its speed until it initially meshes with the low-speed gear 1.

[0044] The maximum torsional height of the paddle 4 is located between the pitch circle of the high-speed gear 2 and half of the tooth tip height, ensuring that the paddle 4 can contact the low-speed gear 1.

[0045] S4, gear shaft 3 continues to rotate. At this time, although high-speed gear 2 meshes with low-speed gear 1, gear shaft 3 is in an unloaded state, that is, the ratio of the rotational speed of gear shaft 3 to the rotational speed of other gear shaft 3 is still 101-102:100. After high-speed gear 2 and low-speed gear 1 initially mesh, low-speed gear 1 is the driving gear and high-speed gear 2 is the driven gear, that is, the rotational speed of high-speed gear 2 is equal to the rotational speed of other gear shaft 3. Thus, a speed difference is formed between high-speed gear 2 and the corresponding gear shaft 3. Then, low-speed gear 1 drives high-speed gear 2 to rotate and move along the thread tightening direction of gear shaft 3 until high-speed gear 2 and low-speed gear 1 are fully meshed. At this time, high-speed gear 2 reaches the end of thread section 301 and high-speed gear 2 no longer moves along gear shaft 3. That is, high-speed gear 2 and gear shaft 3 are in a loaded state, high-speed gear 2 is the driving gear and low-speed gear 1 is the driven gear, and the rotational speed of this gear shaft 3 is equal to the rotational speed of other gear shaft 3.

[0046] The above method enables online replacement of high-speed gears, which is simple to operate and improves work efficiency.

[0047] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-drive transmission device for online high-speed gear replacement, comprising a low-speed gear (1) and multiple sets of drive components for driving the low-speed gear (1) to rotate, the drive components being evenly spaced along the circumference of the low-speed gear (1), each drive component including a gear shaft (3) and a high-speed gear (2) capable of meshing with the low-speed gear (1), the gear shaft (3) and the high-speed gear (2) being threadedly engaged, characterized in that: The thread on the gear shaft (3) enables the high-speed gear (2) to rotate with the low-speed gear (1) and gradually disengage from the low-speed gear (1) after the gear shaft (3) stops. The end face of the high-speed gear (2) facing away from the disengagement direction is rotatably connected to multiple paddles (4) evenly spaced along its circumference. A torsion spring is provided between the paddles (4) and the high-speed gear (2). After the replacement high-speed gear (2) is started, the gear shaft (3) is started to reach the required speed within 2 seconds. The gear shaft (3) is in an unloaded state and its speed ratio with the speed of other gear shafts (3) is 101-102:

100. The paddles (4) on the high-speed gear (2) are brought into contact with the low-speed gear (1) by inertia, so that the speed of the high-speed gear (2) gradually increases. The gear gradually increases and moves along the screw tightening direction of the gear shaft (3) to achieve meshing between the high-speed gear (2) and the low-speed gear (1); the end face of the high-speed gear (2) is fixedly connected to a fixing pin (401), the axis of the fixing pin (401) is parallel to the axis of the high-speed gear (2), the fixing pin (401) is rotatably connected to the paddle (4), and the torsion spring is sleeved on the fixing pin (401); the paddle (4) extends in a direction perpendicular to the axis of the fixing pin (401), and the paddle (4) has a contact end and a distance end on both sides of the fixing pin (401), the distance between the contact end and the axis of the high-speed gear (2) is greater than the distance between the distance end and the axis of the high-speed gear (2); the maximum torsional height of the paddle (4) is located between the pitch circle of the high-speed gear (2) and half the tooth tip height.

2. The multi-drive transmission device for online high-speed gear replacement as described in claim 1, characterized in that: The high-speed gear (2) is coaxially fixedly connected to an annular limiting plate (201) on the end face away from the disengagement direction. There is a receiving space (202) between the annular limiting plate (201) and the end face, and the paddle (4) is located in the receiving space (202).

3. The multi-drive transmission device for online high-speed gear replacement as described in claim 2, characterized in that: The diameter of the annular limiting plate (201) is smaller than the root circle diameter of the high-speed gear (2).

4. The multi-drive transmission device for online high-speed gear replacement as described in claim 1, characterized in that: A baffle (302) is detachably provided at the end of the gear shaft (3) along the disengagement direction.

5. A method for online high-speed gear replacement, the method being based on a multi-drive transmission device for online high-speed gear replacement as described in any one of claims 1-4, characterized in that... Includes the following steps: S1, the gear shaft (3) stops rotating, the low-speed gear (1) drives the high-speed gear (2) to rotate and move along the gear shaft (3) until the high-speed gear (2) disengages from the low-speed gear (1); S2, replace the high-speed gear (2) to the initial position, the initial position is when the paddle (4) is 0.1-0.3mm away from the low-speed gear (1); S3, start the gear shaft (3) to reach the required speed within 2s. The gear shaft (3) is in an unloaded state and its speed ratio with the speed of other gear shafts (3) is 101-102:

100. The high-speed gear (2) moves along the gear shaft (3) by inertia, so that the paddle (4) contacts the low-speed gear (1), and then the high-speed gear (2) and the low-speed gear (1) are initially meshed. S4, the gear shaft continues to rotate, the low-speed gear (1) drives the high-speed gear (2) to rotate and move along the gear shaft (3) until the high-speed gear (2) and the low-speed gear (1) are fully meshed.

6. The method for online replacement of high-speed gears as described in claim 5, characterized in that: In S2, the initial position is 0.2 mm away from the low-speed gear (1) by the paddle (4).

7. The method for online replacement of high-speed gears as described in claim 5, characterized in that: In S4, the ratio of the rotational speed of the gear shaft (3) to the rotational speed of the other gear shaft (3) is 101-102:100, and the rotational speed of the high-speed gear (2) is equal to the rotational speed of the other gear shafts (3).

Images