A double drive water cooled transmission gear case

Abstract

The application discloses a double-driven water-cooled transmission gear box. A rotary driving device and a tilting driving device are arranged outside a gear box body, the gear box body is internally provided with a first rotary bearing and a second rotary bearing, the inner rings of the two rotary bearings are fixed with the gear box body; a first output gear of the rotary driving device is engaged with an outer ring of the first rotary bearing, and a second output gear of the tilting driving device is engaged with an outer ring of the second rotary bearing; the outer ring of the first rotary bearing drives a material chute to rotate; the outer ring of the second rotary bearing is fixedly connected with a tilting gear ring; input gears of a first tilting speed reduction mechanism and a second tilting speed reduction mechanism are respectively engaged with the tilting gear ring, and output gears are respectively connected with two sides of the material chute, so that horizontal rotation of the tilting gear ring is converted into vertical rotation to drive the material chute to tilt; the outer ring of the second rotary bearing is provided with a rotating speed detection element, and a synchronous control unit adjusts the rotating speed of the tilting driving device according to a feedback signal of the rotating speed detection element, so that the rotating speeds of the two rotary bearing outer rings are synchronous.

Description

Technical Field

[0001] This application relates to the technical field of bellless blast furnace top equipment, and in particular to a dual-drive water-cooled transmission gearbox. Background Technology

[0002] The water-cooled transmission gearbox in the bell-less blast furnace top equipment is the core equipment of the blast furnace top charging system. Installed on the top steel ring of the blast furnace throat cone, it drives the charging chute to rotate and tilt, ensuring the even and efficient distribution of ironmaking charge into the blast furnace. The charging chute can rotate independently, tilt independently, or in combination, enabling various charging methods such as annular, spiral, fan-shaped, and dotted charging. Due to the extremely harsh working environment of the water-cooled transmission gearbox, its lower part directly bears the heat radiation and conduction from the blast furnace temperature. Under normal operating conditions, the furnace top temperature is approximately 150℃ to 250℃, and in short-term accident conditions, it can reach 350℃ or even higher. Simultaneously, blast furnace dust easily penetrates the gearbox. Therefore, the stability and reliability of this gearbox directly affect the blast furnace's production capacity, efficiency, and safe operation.

[0003] Currently, similar products on the market typically use a differential reducer as a power coupling device. This differential reducer is installed above the gearbox body, and its input end is connected to two variable frequency motors. Through the complex planetary differential structure inside the differential reducer, the power of the two motors is combined and decomposed, and then output to two slewing bearings inside the gearbox body to achieve separate and combined control of the rotation and tilting of the fabric chute.

[0004] However, the existing water-cooled transmission gearboxes have the following drawbacks: the differential reducer adopts a planetary differential structure, with numerous internal gears and an extremely complex transmission chain. This not only results in extremely high precision requirements for component machining, difficult assembly, and long installation cycles, but also leads to significant cumulative errors during power transmission due to the lengthy and complex transmission chain, resulting in low transmission accuracy. Furthermore, the lack of a precise synchronization control mechanism between the two slewing bearings makes it difficult to meet the increasingly stringent requirements for coordinated control precision of rotation and tilting in blast furnace charging processes. In addition, due to the complex structure of the differential reducer, it requires complete disassembly and replacement when a fault occurs, leading to high maintenance difficulty, long downtime, and severely impacting the normal production rate of the blast furnace. Summary of the Invention

[0005] This application provides a dual-drive water-cooled transmission gearbox, which solves the technical problems in the prior art where the water-cooled transmission gearbox, due to its planetary differential structure, suffers from a complex transmission chain, high machining accuracy requirements, low transmission accuracy, and a lack of precise synchronous control between the two slewing bearings.

[0006] This application provides a dual-drive water-cooled transmission gearbox, including a gearbox body, a rotary drive device, a tilting drive device, a first tilting reduction mechanism, and a second tilting reduction mechanism. The rotary drive device and the tilting drive device are respectively disposed on the outside of the gearbox body, and the first tilting deceleration mechanism and the second tilting deceleration mechanism are disposed inside the gearbox body; a first slewing bearing and a second slewing bearing are disposed inside the gearbox body, and the first slewing bearing and the second slewing bearing each have an inner ring and an outer ring that can rotate relative to each other, and the inner rings of the two are respectively fixedly connected to the gearbox body. The rotary drive device has a first output gear that meshes with the outer ring of the first slewing bearing; the tilting drive device has a second output gear that meshes with the outer ring of the second slewing bearing. The outer ring of the first slewing bearing is fixedly connected to the rotating part inside the gearbox body, and is used to drive the cloth chute to rotate; The outer ring of the second slewing bearing is fixedly connected to the tilting gear ring and rotates synchronously. Both the first tilting reduction mechanism and the second tilting reduction mechanism have input gears and output gears. Each input gear meshes with the tilting large gear ring, and each output gear is connected to both sides of the fabric chute for suspending the fabric chute. The first tilting deceleration mechanism and the second tilting deceleration mechanism convert the horizontal rotational motion of the tilting large gear ring into the vertical rotational motion of the output gear, so as to drive the fabric chute to tilt upward or downward; The outer ring of the second slewing bearing is provided with a speed detection element for detecting the actual speed of the second slewing bearing; a synchronization control unit is provided between the rotary drive device and the tilting drive device. The synchronization control unit adjusts the output speed of the tilting drive device according to the actual speed signal of the second slewing bearing fed back by the speed detection element, so as to synchronize the speed of the outer ring of the second slewing bearing with the speed of the outer ring of the first slewing bearing.

[0007] In one possible implementation, the first tilting deceleration mechanism and the second tilting deceleration mechanism are respectively disposed on both sides inside the gearbox body.

[0008] In one possible implementation, both the first tilting reduction mechanism and the second tilting reduction mechanism include a worm, a worm wheel, a gear shaft, and an output gear; The input gear is connected to the worm, the worm meshes with the worm wheel, the worm wheel is connected to the gear shaft, the gear shaft meshes with the output gear, and the output gear is used to suspend the fabric chute.

[0009] In one possible implementation, the input gear is fixedly connected to the upper end of the worm and is coaxially arranged with the worm.

[0010] In one possible implementation, the worm gear is coaxially and fixedly connected to the gear shaft.

[0011] In one possible implementation, the speed detection element includes a speed measuring gear and an encoder. The speed measuring gear is disposed on the outer ring of the second slewing bearing and rotates synchronously with the second slewing bearing. The encoder cooperates with the speed measuring gear to collect the speed signal of the speed measuring gear and feed it back to the synchronization control unit.

[0012] In one possible implementation, both the rotary drive and the tilting drive are cycloidal reducers.

[0013] In one possible implementation, the rotation drive device is driven by a servo motor, and the tilt drive device is driven by a servo motor.

[0014] In one possible implementation, the tilting gear ring is fixedly connected to the lower part of the outer ring of the second slewing bearing.

[0015] In one possible implementation, a mounting base is provided above the gearbox body, and the rotary drive device and the tilting drive device are respectively mounted on the mounting base.

[0016] One or more technical solutions provided in the embodiments of this application have at least the following technical effects: This application embodiment replaces the traditional differential reducer with a separately set rotary drive device and tilting drive device. Rotation and tilting are driven independently, and closed-loop synchronous control is formed by a speed detection element and a synchronous control unit. The planetary differential structure is eliminated, which effectively solves the technical problems of complex transmission chain, high machining accuracy requirements, low transmission accuracy and lack of precise synchronous control between the two slewing bearings in the prior art. Thus, it achieves the technical effects of simplified transmission chain, low machining accuracy requirements, convenient installation and replacement, high control accuracy and fast response speed. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a dual-drive water-cooled transmission gearbox provided in an embodiment of this application; Figure 2 This is a schematic diagram of the synchronous speed measuring device in a dual-drive water-cooled transmission gearbox provided in an embodiment of this application.

[0019] Icons: 1-Gearbox body; 2-Rotary drive device; 3-First output gear; 4-Tilting drive device; 5-Second output gear; 6-First slewing bearing; 7-Second slewing bearing; 8-Tilting large gear ring; 9-Input gear; 10-Worm gear; 11-Worm; 12-Gear shaft; 13-Output gear; 14-Fabric chute; 15-Speed ​​detection element; 151-Speed ​​measuring gear; 152-Encoder; 16-Synchronization control unit. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0022] This application provides a dual-drive water-cooled transmission gearbox, such as... Figure 1 and Figure 2 As shown, the dual-drive water-cooled transmission gearbox includes a gearbox body 1, a rotary drive device 2, a tilting drive device 4, a first tilting reduction mechanism, and a second tilting reduction mechanism.

[0023] The rotary drive device 2 and the tilting drive device 4 are respectively disposed on the outside of the gearbox body 1, while the first tilting reduction mechanism and the second tilting reduction mechanism are disposed inside the gearbox body 1. The gearbox body 1 contains a first slewing bearing 6 and a second slewing bearing 7, both of which have relatively rotatable inner and outer rings, and their inner rings are fixedly connected to the gearbox body 1. The rotary drive device 2 has a first output gear 3, which meshes with the outer ring of the first slewing bearing 6. The tilting drive device 4 has a second output gear 5, which meshes with the outer ring of the second slewing bearing 7. The outer ring of the first slewing bearing 6 is fixedly connected to the rotating part inside the gearbox body 1, used to drive the fabric chute 14 to rotate. The outer ring of the second slewing bearing 7 is fixedly connected to the tilting large gear ring 8 and rotates synchronously.

[0024] Both the first and second tilting reduction mechanisms have input gears 9 and output gears 13. Each input gear 9 meshes with the tilting large gear ring 8, and each output gear 13 is connected to both sides of the fabric chute 14 for suspending the fabric chute 14. The first and second tilting reduction mechanisms convert the horizontal rotational motion of the tilting large gear ring 8 into the vertical rotational motion of the output gears 13, thereby driving the fabric chute 14 to tilt upwards or downwards. The outer ring of the second slewing bearing 7 is equipped with a speed detection element 15 for detecting the actual speed of the second slewing bearing 7. A synchronization control unit 16 is provided between the rotary drive device 2 and the tilting drive device 4. The synchronization control unit 16 adjusts the output speed of the tilting drive device 4 according to the actual speed signal of the second slewing bearing 7 fed back by the speed detection element 15, so that the speed of the outer ring of the second slewing bearing 7 is synchronized with the speed of the outer ring of the first slewing bearing 6.

[0025] In this embodiment, both the rotary drive device 2 and the tilting drive device 4 are cycloidal reducers, which are compact in structure, have a large transmission ratio, and strong load-bearing capacity, making them suitable for the harsh working conditions of the blast furnace roof. The rotary drive device 2 and the tilting drive device 4 are both driven by servo motors. The servo motors, as driving components, provide power input to both the rotary drive device 2 and the tilting drive device 4. The servo motors integrate high-precision encoders, enabling precise speed and position control. Compared to traditional frequency converters, servo motors offer higher control precision and faster response speeds, better meeting the precision requirements of the blast furnace charging process for coordinated control of rotation and tilting.

[0026] In this embodiment, the first tilting reduction mechanism and the second tilting reduction mechanism are respectively disposed on both sides inside the gearbox body 1. The two sides of the fabric chute 14 are respectively suspended on the output gears 13 of the first tilting reduction mechanism and the output gears 13 of the second tilting reduction mechanism. The two sets of tilting reduction mechanisms drive the two sides of the fabric chute 14 synchronously, so that the fabric chute 14 is subjected to more balanced force and moves more smoothly during tilting, avoiding the problems of uneven load and jamming that may occur with unilateral drive.

[0027] In this embodiment, both the first and second tilting reduction mechanisms include a worm 11, a worm wheel 10, a gear shaft 12, and an output gear 13. An input gear 9 is connected to the worm 11, the worm 11 meshes with the worm wheel 10, the worm wheel 10 is connected to the gear shaft 12, and the gear shaft 12 meshes with the output gear 13. The output gear 13 is used to suspend the fabric chute 14. The input gear 9 serves as the power input end and is driven by the tilting large gear ring 8. The tilting large gear ring 8 meshes with the input gear 9, transmitting power to the input gear 9. The input gear 9 is fixedly connected to the upper end of the worm 11 and coaxially arranged with it, driving the worm 11 to rotate synchronously. The worm 11 meshes with the worm wheel 10, driving the worm wheel 10 to rotate. The worm wheel 10 is coaxially fixedly connected to the gear shaft 12, driving the gear shaft 12 to rotate synchronously. Gear shaft 12 meshes with output gear 13, driving output gear 13 to rotate. The axis of output gear 13 is perpendicular to the axis of tilting large gear ring 8, thus converting the horizontal rotational motion of tilting large gear ring 8 into the vertical rotational motion of output gear 13. Power is input through input gear 9 and then transmitted sequentially through worm 11, worm wheel 10, and gear shaft 12 to output gear 13, ultimately driving the fabric chute 14 to tilt upwards or downwards. The worm gear pair formed by worm 11 and worm wheel 10 has a self-locking characteristic, maintaining the fabric chute 14 at the current tilt angle when the tilting drive device 4 stops working, eliminating the need for an additional braking device, simplifying the structure and improving reliability.

[0028] In this embodiment, the speed detection element 15 includes a speed measuring gear 151 and an encoder 152. The speed measuring gear 151 is disposed on the outer ring of the second slewing bearing 7 and rotates synchronously with the second slewing bearing 7. The encoder 152 cooperates with the speed measuring gear 151, and the detection end of the encoder 152 is disposed opposite to the speed measuring gear 151, for collecting the speed signal of the speed measuring gear 151 and feeding it back to the synchronization control unit 16. The synchronization control unit 16 calculates the speed deviation in real time based on the actual speed signal of the second slewing bearing 7 fed back by the encoder 152 and in combination with a preset speed command, and outputs a speed adjustment command to the tilting drive device 4 to adjust the output speed of the tilting drive device 4 so that the speed of the outer ring of the second slewing bearing 7 is synchronized with the speed of the outer ring of the first slewing bearing 6.

[0029] In this embodiment, the tilting gear ring 8 is fixedly connected to the lower part of the outer ring of the second slewing bearing 7 and rotates synchronously with the outer ring of the second slewing bearing 7. A mounting base is provided on the top of the gearbox body 1, and the rotary drive device 2 and the tilting drive device 4 are respectively mounted on the mounting base. The mounting base provides stable support for the rotary drive device 2 and the tilting drive device 4, and facilitates their installation, maintenance and replacement.

[0030] The working principle of the dual-drive water-cooled transmission gearbox provided in this application is as follows: When only the fabric chute 14 needs to rotate, the rotary drive device 2 activates, and the first output gear 3 drives the outer ring of the first slewing bearing 6, which meshes with it, to rotate. Simultaneously, the tilting drive device 4 activates, and the second output gear 5 drives the outer ring of the second slewing bearing 7 to rotate. The synchronization control unit 16 adjusts the output speed of the tilting drive device 4 in real time based on the actual speed signal of the second slewing bearing 7 fed back by the speed detection element 15, ensuring that the speed of the outer ring of the second slewing bearing 7 is consistent with and in the same direction as the speed of the outer ring of the first slewing bearing 6. At this time, the outer ring of the first slewing bearing 6 drives the rotating part inside the gearbox body 1 to rotate, and the fabric chute 14 rotates accordingly. Since the outer ring of the second slewing bearing 7 rotates at the same speed as the outer ring of the first slewing bearing 6, there is no relative rotation between the tilting gear ring 8 and the input gear 9, and the fabric chute 14 only rotates without tilting.

[0031] When only the fabric chute 14 needs to tilt, the rotary drive device 2 brakes, and the first output gear 3 and the first slewing bearing 6 remain stationary. The tilting drive device 4 then activates, and the second output gear 5 drives the outer ring of the second slewing bearing 7 to rotate. The outer ring of the second slewing bearing 7 drives the tilting large gear ring 8 to rotate synchronously, and the tilting large gear ring 8 drives the input gear 9 meshing with it to rotate. The input gear 9 drives the worm 11 to rotate, the worm 11 drives the worm wheel 10 to rotate, the worm wheel 10 drives the gear shaft 12 to rotate, the gear shaft 12 drives the output gear 13 to rotate, and finally, the output gear 13 drives the fabric chute 14 to tilt upwards or downwards.

[0032] When the fabric chute 14 needs to rotate and tilt simultaneously, the rotation drive device 2 and the tilt drive device 4 operate simultaneously. The synchronization control unit 16 adjusts the output speed of the tilt drive device 4 based on the actual speed signal of the second slewing bearing 7 fed back by the speed detection element 15, creating a preset speed difference between the outer ring speed of the second slewing bearing 7 and the outer ring speed of the first slewing bearing 6. Due to the speed difference between the two slewing bearings, relative motion occurs between the tilting large gear ring 8 and the input gear 9. The input gear 9 receives power input, which is transmitted to the output gear 13 via the worm gear 11, worm wheel 10, and gear shaft 12, thereby driving the fabric chute 14 to change its tilt angle while rotating, achieving a combined rotational and tilting motion of the fabric chute 14.

[0033] This embodiment replaces the traditional differential reducer with independently configured rotary drive device 2 and tilting drive device 4, eliminating the planetary differential structure. This significantly simplifies the transmission chain, reduces the number of gears, and substantially lowers the precision requirements for component machining and the overall assembly difficulty. Simultaneously, closed-loop synchronous control is achieved through the speed detection element 15 and the synchronization control unit 16, realizing precise synchronization of speeds between the two slewing bearings. This effectively improves transmission and control accuracy, better meeting the requirements of blast furnace charging process for coordinated control of rotation and tilting. Furthermore, the rotary drive device 2 and tilting drive device 4 are independently mounted on mounting bases outside the gearbox body 1. When one drive device malfunctions, it can be individually disassembled and replaced without disassembling the entire gearbox, facilitating maintenance, minimizing downtime, and ensuring the normal production rate of the blast furnace.

[0034] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0035] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A dual-drive water-cooled transmission gearbox, characterized in that, It includes a gearbox body, a rotary drive device, a tilting drive device, a first tilting reduction mechanism, and a second tilting reduction mechanism. The rotary drive device and the tilting drive device are respectively disposed on the outside of the gearbox body, and the first tilting deceleration mechanism and the second tilting deceleration mechanism are disposed inside the gearbox body; a first slewing bearing and a second slewing bearing are disposed inside the gearbox body, and the first slewing bearing and the second slewing bearing each have an inner ring and an outer ring that can rotate relative to each other, and the inner rings of the two are respectively fixedly connected to the gearbox body. The rotary drive device has a first output gear that meshes with the outer ring of the first slewing bearing; the tilting drive device has a second output gear that meshes with the outer ring of the second slewing bearing. The outer ring of the first slewing bearing is fixedly connected to the rotating part inside the gearbox body, and is used to drive the cloth chute to rotate; The outer ring of the second slewing bearing is fixedly connected to the tilting gear ring and rotates synchronously. Both the first tilting reduction mechanism and the second tilting reduction mechanism have input gears and output gears. Each input gear meshes with the tilting large gear ring, and each output gear is connected to both sides of the fabric chute for suspending the fabric chute. The first tilting deceleration mechanism and the second tilting deceleration mechanism convert the horizontal rotational motion of the tilting large gear ring into the vertical rotational motion of the output gear, so as to drive the fabric chute to tilt upward or downward; The outer ring of the second slewing bearing is provided with a speed detection element for detecting the actual speed of the second slewing bearing; a synchronization control unit is provided between the rotary drive device and the tilting drive device. The synchronization control unit adjusts the output speed of the tilting drive device according to the actual speed signal of the second slewing bearing fed back by the speed detection element, so as to synchronize the speed of the outer ring of the second slewing bearing with the speed of the outer ring of the first slewing bearing.

2. The dual-drive water-cooled transmission gearbox according to claim 1, characterized in that, The first tilting deceleration mechanism and the second tilting deceleration mechanism are respectively disposed on both sides inside the gearbox body.

3. The dual-drive water-cooled transmission gearbox according to claim 1, characterized in that, Both the first tilting reduction mechanism and the second tilting reduction mechanism include a worm, a worm wheel, a gear shaft, and an output gear; The input gear is connected to the worm, the worm meshes with the worm wheel, the worm wheel is connected to the gear shaft, the gear shaft meshes with the output gear, and the output gear is used to suspend the fabric chute.

4. The dual-drive water-cooled transmission gearbox according to claim 3, characterized in that, The input gear is fixedly connected to the upper end of the worm and is coaxially arranged with the worm.

5. The dual-drive water-cooled transmission gearbox according to claim 3, characterized in that, The worm gear is coaxially and fixedly connected to the gear shaft.

6. The dual-drive water-cooled transmission gearbox according to claim 1, characterized in that, The speed detection element includes a speed measuring gear and an encoder. The speed measuring gear is disposed on the outer ring of the second slewing bearing and rotates synchronously with the second slewing bearing. The encoder cooperates with the speed measuring gear to collect the speed signal of the speed measuring gear and feed it back to the synchronization control unit.

7. The dual-drive water-cooled transmission gearbox according to claim 1, characterized in that, Both the rotary drive device and the tilting drive device are cycloidal reducers.

8. The dual-drive water-cooled transmission gearbox according to claim 1, characterized in that, The rotation drive device is driven by a servo motor, and the tilt drive device is driven by a servo motor.

9. The dual-drive water-cooled transmission gearbox according to claim 1, characterized in that, The tilting gear ring is fixedly connected to the lower part of the outer ring of the second slewing bearing.

10. The dual-drive water-cooled transmission gearbox according to claim 1, characterized in that, A mounting base is provided on the top of the gearbox body, and the rotary drive device and the tilting drive device are respectively mounted on the mounting base.

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