Second brake acting on high-speed shaft

Abstract

The utility model relates to the technical field of high-speed shaft braking, in particular to a second brake acting on a high-speed shaft, which comprises a frame body, a power source, a planetary reducer, a roller and a braking assembly, the body of the power source is fixedly connected with the frame body, the planetary reducer is arranged in the roller, and the braking assembly is fixedly connected with the planetary reducer. The output shaft of the power source is connected with the input end of the planetary reducer, the roller is connected with the output end of the planetary reducer, the braking assembly is arranged at the end, away from the power source, of the roller, and the braking assembly is in braking connection with the input end of the planetary reducer. The method has the effect of reducing the total weight and the cost burden of the system.

Description

Technical Field

[0001] The present application relates to the technical field of high-speed shaft braking, and in particular to a second brake acting on a high-speed shaft. Background Art

[0002] In the shipbuilding and offshore engineering sectors, stringent safety requirements are placed on winches used in manned applications, particularly regarding emergency braking functionality. To safeguard personnel safety and equipment reliability, major classification societies and design specifications mandate the use of a dedicated secondary safety braking system, in addition to the input braking system, to ensure the immediate stopping of the winch in the event of an emergency. To this end, researchers have invested significant effort in developing new technologies and methods for these applications to enhance overall safety.

[0003] The solutions in the related art mainly fall into two categories: one is to install one or more caliper disc brakes on the winch drum flange to achieve emergency braking, and the other is to install a multi-friction plate brake with a hydraulic release spring device on the non-drive end of the winch. Although the former can achieve the required braking torque, it faces many challenges in practical application due to factors such as its high installation space requirements and complex control methods. The latter, although more compact in structure, still has difficulty meeting the demand for higher braking torque due to the limited load capacity of a single brake, and also encounters the same installation space and cost issues. These solutions not only increase the overall weight and cost burden of the system, but may also lead to problems such as inconvenient operation and complex maintenance due to excessive braking torque. Utility Model Content

[0004] In order to reduce the overall weight and cost burden of the system, the present application provides a second brake acting on the high-speed shaft.

[0005] The second brake provided in this application, which acts on a high-speed shaft, adopts the following technical solution:

[0006] A second brake acting on a high-speed shaft includes a frame, a power source, a planetary reducer, a roller and a brake assembly, wherein the body of the power source is fixedly connected to the frame, the planetary reducer is arranged in the roller, the output shaft of the power source is connected to the input end of the planetary reducer, the roller is connected to the output end of the planetary reducer, the brake assembly is arranged at the end of the roller away from the power source, and the brake assembly is brake-connected to the input end of the planetary reducer.

[0007] By adopting the above technical solution, since the brake assembly is brake-connected to the input end of the planetary reducer, the braking torque is relatively small, so the brake selection is smaller, relatively smaller in size and lighter in weight, which reduces costs, saves space required for installation and debugging, and simplifies the installation and debugging process.

[0008] Optionally, the planetary reducer includes a three-stage reduction assembly and a two-stage reduction assembly, the output shaft of the power source is drive-connected to the input end of the three-stage reduction assembly, the output end of the three-stage reduction assembly is drive-connected to the input end of the two-stage reduction assembly, the output end of the two-stage reduction assembly is drive-connected to the roller, and the brake assembly is brake-connected to the input end of the three-stage reduction assembly.

[0009] By adopting the above technical solution, a two-stage reduction transmission is achieved, which improves the overall transmission efficiency and smoothness, making the operation of the entire winch more stable and reliable. Multi-stage reduction facilitates the braking connection between the braking assembly and the high-speed shaft in the multi-stage reduction assembly, thereby reducing the braking torque.

[0010] Optionally, the three-stage reduction assembly includes a high-speed sun gear, a center shaft, multiple high-speed planetary gears, a high-speed planetary carrier and a high-speed inner gear ring. The high-speed planetary carrier has a frame foot and a frame ring. The center shaft is driven and connected to the high-speed sun gear and can rotate synchronously with the high-speed sun gear. The high-speed inner gear ring is relatively fixed to the roller. The high-speed planetary gear can rotate around its own axis and is rotatably connected to the frame foot of the high-speed planetary carrier through bearings. The high-speed planetary gears are respectively engaged with the high-speed inner gear ring and the high-speed sun gear. The frame ring of the high-speed planetary carrier serves as the output end of the three-stage reduction assembly and is driven and connected to the input end of the two-stage reduction assembly.

[0011] By adopting the above technical solution, when the central shaft is driven, the high-speed sun gear rotates synchronously due to its driving connection with the central shaft. The high-speed inner ring gear remains fixed relative to the drum. The high-speed planetary gears are mounted on the legs of the high-speed planetary carrier via bearings, allowing each high-speed planetary gear to rotate independently around its own axis. Simultaneously, these high-speed planetary gears mesh with both the high-speed sun gear and the high-speed inner ring gear. As the high-speed sun gear rotates, it drives the high-speed planetary gears to roll within the high-speed inner ring gear. Due to the speed difference between the high-speed inner ring gear and the high-speed sun gear, the high-speed planetary gears both orbit around the high-speed sun gear and rotate around their own axes. The orbital rotation of the high-speed planetary gears drives the connected high-speed planetary carrier to rotate as well. The carrier ring of the high-speed planetary carrier serves as the output of the three-stage reduction assembly, and its rotational speed and direction are determined by the orbital rotation of the high-speed planetary gears. This transmission method achieves a reduction effect from the high-speed sun gear to the carrier ring of the high-speed planetary carrier through the orbital and rotational motion of the planetary gears. The ring of the high-speed planetary carrier is driven and connected to the input end of the secondary reduction assembly, transmitting the decelerated power to the secondary reduction assembly for further transmission or deceleration processing.

[0012] Optionally, the power source is drivingly connected to the central shaft via a coupling.

[0013] By adopting the above technical solution, a stable transmission connection is formed between the power source and the central shaft, ensuring efficient power transmission, simplifying the assembly process and improving the overall structural compactness and reliability, effectively reducing energy loss and maintenance costs caused by improper connection.

[0014] Optionally, the brake assembly includes a brake, an end cover and a sleeve, the end cover is fixedly connected to the frame, and the roller is connected to the end cover so as to rotate around its own axis, both ends of the sleeve are provided with internal splines, the end of the center axis away from the coupling is provided with a first external spline, the brake shaft of the brake is provided with a second external spline, one end of the sleeve is connected to the first external spline, and the other end is connected to the second external spline.

[0015] By adopting the above-mentioned technical solution, the installation position and structural design of the brake assembly enable a faster and more accurate braking process. Under the action of the brake, the sleeve can quickly transmit the braking torque, achieving instant braking of the central shaft. Because the internal splines at each end of the sleeve tightly mate with the first external spline of the central shaft and the second external spline of the brake shaft, there is no additional axial displacement between the sleeve and the brake during braking, ensuring stable and reliable braking.

[0016] Optionally, the planetary reducer also includes a first-stage reduction assembly, the output end of the second-stage reduction assembly is drive-connected to the input end of the first-stage reduction assembly, the output end of the first-stage reduction assembly is drive-connected to the roller, the second-stage reduction assembly includes a medium-speed sun gear, a plurality of medium-speed planetary gears, a medium-speed planetary carrier and a medium-speed inner gear ring, the medium-speed planetary carrier has a frame foot and a frame ring, the frame ring of the high-speed planetary carrier is drive-connected to the medium-speed sun gear, the medium-speed sun gear is sleeved on the central shaft and supported for rotation by the central shaft, the medium-speed inner gear ring is relatively fixed to the roller, the medium-speed planetary gear can rotate around its own axis and is rotatably connected to the frame foot of the medium-speed planetary carrier through bearings, and the medium-speed planetary gears are respectively meshed with the medium-speed inner gear ring and the medium-speed sun gear, and the frame ring of the medium-speed planetary carrier is drive-connected to the roller as the output end of the second-stage reduction assembly.

[0017] By adopting the above technical solution, in the secondary reduction assembly, power is first input through the ring of the high-speed planetary carrier, which drives the connected medium-speed sun gear to rotate. The medium-speed internal gear remains fixed relative to the drum. The medium-speed planetary gears are mounted on the carrier feet of the medium-speed planetary carrier via bearings, allowing each medium-speed planetary gear to rotate independently around its own axis. Simultaneously, these medium-speed planetary gears mesh with both the medium-speed sun gear and the medium-speed internal gear. As the medium-speed sun gear rotates, it drives the medium-speed planetary gears to roll within the medium-speed internal gear. Due to the speed difference between the medium-speed internal gear and the medium-speed sun gear, the medium-speed planetary gears both orbit around the medium-speed sun gear and rotate around their own axes. The orbital rotation of the medium-speed planetary gears drives the connected medium-speed planetary carrier to rotate as well. The ring of the medium-speed planetary carrier serves as the output of the secondary reduction assembly, and its rotational speed and direction are determined by the orbital rotation of the medium-speed planetary gears. This transmission method achieves a reduction in speed from the medium-speed sun gear to the ring of the medium-speed planetary carrier through the orbital and rotational motion of the planetary gears. Finally, it is transmitted to the input end of the first-stage reduction assembly through the carrier ring of the medium-speed planetary carrier.

[0018] Optionally, the first-stage reduction assembly includes a low-speed sun gear, multiple low-speed planetary gears, a low-speed planetary carrier and a low-speed inner gear ring, the low-speed planetary carrier has a frame foot, the frame ring of the medium-speed planetary carrier is drivingly connected to the low-speed sun gear, the low-speed planetary gear can rotate around its own axis and is rotatably connected to the frame foot of the low-speed planetary carrier through bearings, and the low-speed planetary gears are respectively engaged with the low-speed inner gear ring and the low-speed sun gear, the low-speed planetary carrier is fixedly connected to the frame body by fasteners, and the low-speed inner gear ring is fixed relative to the roller as the output end of the first-stage reduction assembly.

[0019] By adopting the above technical solution, the primary reduction assembly serves as the output stage of the planetary reducer, transmitting power to the drum. In the primary reduction assembly, power is first input by the intermediate-speed planetary carrier's ring, which drives the connected low-speed sun gear. The low-speed planetary carrier remains stationary relative to the carrier. The low-speed planetary gears are mounted on the carrier's legs via bearings, enabling each low-speed planetary gear to rotate independently around its own axis. Simultaneously, these low-speed planetary gears mesh with both the low-speed sun gear and the low-speed ring gear. When the low-speed sun gear rotates, it drives the low-speed planetary gears. Since the low-speed planetary carrier remains stationary relative to the carrier, the low-speed ring gear rotates around its own axis under the influence of the low-speed planetary gears. This transmission method achieves a reduction in power from the low-speed sun gear to the low-speed ring gear through the rotation of the low-speed planetary gears. Ultimately, power is transmitted to the drum via the low-speed ring gear.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. By providing a second brake acting on the high-speed shaft, effective emergency braking of the winch is achieved without the need for large brakes or multiple brakes, thereby reducing installation space requirements and weight;

[0022] 2. The planetary reducer structure reduces the workload of the brake components, making the hydraulic pump station used with the brake smaller, further reducing the weight and cost of the entire mechanism;

[0023] 3. The brake assembly and the input end of the planetary reducer are connected through a shaft sleeve spline, which simplifies the control method, reduces the complexity of actual work, and facilitates installation and debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the second brake acting on the high-speed shaft provided in an embodiment of the present application.

[0025] Explanation of the accompanying drawings: 1-power source; 2-end cover; 3-roller; 4-three-stage reduction assembly; 401-high-speed sun gear; 402-center shaft; 403-high-speed planetary gear; 404-high-speed planetary carrier; 405-high-speed inner ring gear; 5-two-stage reduction assembly; 501-medium-speed sun gear; 502-medium-speed planetary gear; 503-medium-speed planetary carrier; 504-medium-speed inner ring gear; 6-one-stage reduction assembly; 601-low-speed sun gear; 602-low-speed planetary gear; 603-low-speed planetary carrier; 604-low-speed inner ring gear; 7-coupling; 8-sleeve; 9-brake. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1 This application is described in further detail.

[0027] In the shipbuilding and offshore engineering sectors, stringent safety requirements are placed on winches used in manned applications, particularly with regard to emergency braking. To safeguard personnel safety and equipment reliability, major classification societies and design specifications mandate the use of a dedicated secondary safety braking system, in addition to the input braking system, to ensure the immediate cessation of winch operation in the event of an emergency. To this end, the present invention discloses a secondary brake acting on a high-speed shaft.

[0028] like Figure 1 As shown, the second brake acting on the high-speed shaft includes a frame, a power source 1, a planetary reducer, a drum 3 and a brake assembly. The body of the power source 1 is fixedly connected to the frame, the planetary reducer is arranged in the drum 3, the output shaft of the power source 1 is connected to the input end of the planetary reducer, and the drum 3 is connected to the output end of the planetary reducer. The brake assembly is arranged at the end of the drum 3 away from the power source 1, and the brake assembly is brake-connected to the input end of the planetary reducer.

[0029] Specifically, the power source 1 can be implemented in a variety of ways. For example, an AC asynchronous power source 1 or a DC servo power source 1 can be selected as the specific power source 1. If an AC asynchronous power source 1 is selected, it can be a squirrel cage type or a wound rotor type. If a DC servo power source 1 is selected, it can be a permanent magnet type or an excitation type. The fixed connection between the power source 1 and the frame can be achieved by screws or other fasteners.

[0030] The planetary reducer includes a three-stage reduction assembly 4, a two-stage reduction assembly 5 and a first-stage reduction assembly 6. Among them:

[0031] The three-stage reduction assembly 4 includes a high-speed sun gear 401, a central shaft 402, a plurality of high-speed planetary gears 403, a high-speed planetary carrier 404, and a high-speed inner ring gear 405. The high-speed sun gear 401 and the central shaft 402 can be configured as a gear shaft, with the high-speed sun gear 401 being the gear portion of the gear shaft, the central shaft 402 being the shaft portion of the gear shaft, and the high-speed planetary carrier 404 having a frame foot and a frame ring. The power source 1 is drivingly connected to the central shaft 402 via a coupling 7, driving the high-speed sun gear 401 to rotate. The high-speed inner ring gear 405 is fixed relative to the drum 3. The high-speed planetary gears 403 are rotationally connected to the frame foot of the high-speed planetary carrier 404 via bearings and mesh with the high-speed inner ring gear 405 and the high-speed sun gear 401, respectively. The frame ring of the high-speed planetary carrier 404 serves as the output end of the three-stage reduction assembly 4 and is drivingly connected to the input end of the two-stage reduction assembly 5.

[0032] The secondary reduction assembly 5 includes a medium-speed sun gear 501, a plurality of medium-speed planetary gears 502, a medium-speed planetary carrier 503, and a medium-speed inner ring gear 504. The medium-speed planetary carrier 503 has a frame foot and a frame ring. The frame ring of the high-speed planetary carrier 404 is drivingly connected to the medium-speed sun gear 501. The medium-speed inner ring gear 504 is relatively fixed to the drum 3, and the medium-speed planetary gears 502 are rotationally connected to the frame foot of the medium-speed planetary carrier 503 through bearings, and are respectively engaged with the medium-speed inner ring gear 504 and the medium-speed sun gear 501. The frame ring of the medium-speed planetary carrier 503 serves as the output end of the secondary reduction assembly 5 and is drivingly connected to the input end of the primary reduction assembly 6.

[0033] The first-stage reduction assembly 6 includes a low-speed sun gear 601, multiple low-speed planetary gears 602, a low-speed planetary carrier 603 and a low-speed inner gear ring 604. The low-speed planetary carrier 603 has a frame foot and a frame ring. The frame ring of the medium-speed planetary carrier 503 is driven and connected to the low-speed sun gear 601. The low-speed sun gear 601 is sleeved on the central shaft 402 and supported for rotation by the central shaft 402. The low-speed inner gear ring 604 serves as the output end of the first-stage reduction assembly 6 and is relatively fixed to the drum 3 through fasteners. The low-speed planetary gear 602 can rotate around its own axis and is rotatably connected to the frame foot of the low-speed planetary carrier 603 through bearings, and the low-speed planetary gear 602 is respectively meshed with the low-speed inner gear ring 604 and the low-speed sun gear 601, and the frame ring of the low-speed planetary carrier 603 is fixed to the frame body.

[0034] In this embodiment, the planetary reducer adopts a planetary reducer including a first-stage reduction assembly. In some other embodiments, the planetary reducer can adopt a planetary reducer including two stages, four stages or even more stages, and this application does not make any limitation.

[0035] like Figure 1 As shown, the brake assembly is brake-connected to the input end of the planetary reducer. Specifically, the brake assembly comprises a brake 9, an end cap 2, and a sleeve 8. The end cap 2 is fixedly connected to the frame, and the drum 3 is rotatably connected to the end cap 2 about its own axis. The sleeve 8 has internal splines at both ends, and a first external spline is provided at the end of the center shaft 402 away from the coupling 7. The brake shaft of the brake 9 has a second external spline. One end of the sleeve 8 is connected to the first external spline, and the other end is connected to the second external spline. The brake 9 can be a multi-friction disc brake with a hydraulic release spring device.

[0036] By applying braking force to the central shaft 402, the brake assembly effectively reduces the overall system size, mass, and manufacturing cost. Compared to the traditional method of applying braking at the low-speed non-drive end, this method significantly reduces the required specifications of the brake 9, simplifies the control logic, and improves response speed. Furthermore, the use of a three-stage reduction mechanism allows for a higher reduction ratio without adding additional equipment, thus better matching the requirements of different work scenarios.

[0037] The implementation principle of the second brake acting on the high-speed shaft in the embodiment of the present application is as follows:

[0038] Power source 1 transmits power to drum 3 through a planetary reducer. The planetary reducer adopts a three-stage reduction structure. Through the meshing between gears and the rotation and revolution of the planetary gears, it achieves smooth deceleration from high speed to low speed, meeting the speed ratio requirements of different working scenarios.

[0039] The brake assembly is connected to the central shaft 402 of the planetary reducer to achieve braking control of the central shaft 402 .

[0040] By applying braking force directly on the high-speed shaft (the input end of the planetary reducer, i.e., central shaft 402), brake 9 effectively reduces the overall system size, mass, and cost. Compared to the traditional method of applying braking at the low-speed, non-driven end, this method significantly reduces the required specifications of brake 9, simplifies the control logic, and improves response speed. Furthermore, the three-stage reduction mechanism design enables brake 9 to achieve a high reduction ratio without adding additional equipment, better matching the requirements of different work scenarios.

[0041] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A second brake acting on a high-speed shaft, characterized in that: include: A frame, a power source (1), a planetary reducer, a roller (3) and a brake assembly, wherein the body of the power source (1) is fixedly connected to the frame, the planetary reducer is arranged in the roller (3), the output shaft of the power source (1) is connected to the input end of the planetary reducer, the roller (3) is connected to the output end of the planetary reducer, the brake assembly is arranged at one end of the roller (3) away from the power source (1), and the brake assembly is brake-connected to the input end of the planetary reducer.

2. The second brake acting on the high-speed shaft according to claim 1, characterized in that: The planetary reducer comprises a three-stage reduction assembly (4) and a two-stage reduction assembly (5); the output shaft of the power source (1) is drivingly connected to the input end of the three-stage reduction assembly (4); the output end of the three-stage reduction assembly (4) is drivingly connected to the input end of the two-stage reduction assembly (5); the output end of the two-stage reduction assembly (5) is drivingly connected to the roller (3); and the brake assembly is brakingly connected to the input end of the three-stage reduction assembly (4).

3. The second brake acting on the high-speed shaft according to claim 2, characterized in that: The three-stage reduction assembly (4) comprises a high-speed sun gear (401), a central shaft (402), a plurality of high-speed planetary gears (403), a high-speed planetary carrier (404) and a high-speed inner gear ring (405). The high-speed planetary carrier (404) has a frame foot and a frame ring. The central shaft (402) is drivingly connected to the high-speed sun gear (401) and can rotate synchronously with the high-speed sun gear (401). The high-speed inner gear ring (405) is relatively fixed to the roller (3). The high-speed planetary gear (403) can rotate around its own axis and is rotationally connected to the frame foot of the high-speed planetary carrier (404) through a bearing. The high-speed planetary gear (403) is meshed with the high-speed inner gear ring (405) and the high-speed sun gear (401) respectively. The frame ring of the high-speed planetary carrier (404) serves as the output end of the three-stage reduction assembly (4) and is drivingly connected to the input end of the two-stage reduction assembly (5).

4. The second brake acting on the high-speed shaft according to claim 3, characterized in that: The power source (1) is drivingly connected to the central shaft (402) via a coupling (7).

5. The second brake acting on the high-speed shaft according to claim 4, characterized in that: The brake assembly includes a brake (9), an end cover (2) and a sleeve (8), the end cover (2) is fixedly connected to the frame, and the roller (3) is rotatably connected to the end cover (2) around its own axis, both ends of the sleeve (8) are provided with internal splines, the end of the center shaft (402) away from the coupling (7) is provided with a first external spline, the brake shaft of the brake (9) is provided with a second external spline, one end of the sleeve (8) is connected to the first external spline, and the other end is connected to the second external spline.

6. The second brake acting on the high-speed shaft according to claim 3, characterized in that: The planetary reducer further comprises a primary reduction assembly (6), the output end of the secondary reduction assembly (5) is drivingly connected to the input end of the primary reduction assembly (6), the output end of the primary reduction assembly (6) is drivingly connected to the roller (3), the secondary reduction assembly (5) comprises a medium-speed sun gear (501), a plurality of medium-speed planetary gears (502), a medium-speed planetary carrier (503) and a medium-speed inner gear ring (504), the medium-speed planetary carrier (503) has a carrier foot and a carrier ring, the carrier ring of the high-speed planetary carrier (404) is connected to the roller (3), and the secondary reduction assembly (5) comprises a medium-speed sun gear (501), a plurality of medium-speed planetary gears (502), a medium-speed planetary carrier (503) and a medium-speed inner gear ring (504), the medium-speed planetary carrier (503) has a carrier foot and a carrier ring, and the carrier ring of the high-speed planetary carrier (404) is connected to the roller (3). The medium-speed sun gear (501) is connected in a driving manner, the medium-speed inner gear ring (504) is relatively fixed to the roller (3), the medium-speed planetary gear (502) is rotatably connected to the frame foot of the medium-speed planetary carrier (503) through a bearing and can rotate around its own axis, and the medium-speed planetary gear (502) is respectively engaged with the medium-speed inner gear ring (504) and the medium-speed sun gear (501), and the frame ring of the medium-speed planetary carrier (503) is connected in a driving manner to the roller (3) as the output end of the secondary reduction assembly (5).

7. The second brake acting on the high-speed shaft according to claim 6, characterized in that: The first-stage reduction assembly (6) includes a low-speed sun gear (601), a plurality of low-speed planetary gears (602), a low-speed planetary carrier (603) and a low-speed inner gear ring (604), wherein the low-speed planetary carrier (603) has a frame foot, the frame ring of the intermediate-speed planetary carrier (503) is drivingly connected to the low-speed sun gear (601), the low-speed planetary gears (602) are rotatably connected to the frame foot of the low-speed planetary carrier (603) through bearings, and the low-speed planetary gears (602) are respectively engaged with the low-speed inner gear ring (604) and the low-speed sun gear (601), the low-speed planetary carrier (603) is fixedly connected to the frame body by fasteners, and the low-speed inner gear ring (604) is fixed relative to the roller (3) as the output end of the first-stage reduction assembly (6).

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