Lifting reduction gearbox lubricating structure
By designing the first oil groove, the second oil groove and the third oil groove on the high-speed shaft side of the lifting gearbox box, the problem of insufficient bearing lubrication when the jack-up platform is largely tilted is solved, and a simple and reliable lubrication effect is achieved to ensure the normal operation of the gearbox.
Patent Information
- Application Number
- CN202422605980.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-10-28
AI Technical Summary
Under large inclination, the small bearings on the high-speed shaft side of the gearbox cannot be fully lubricated, and the existing solutions have problems such as complex structure or high cost and low reliability.
Design a lubrication structure, including the arrangement of a first oil groove, a second oil groove and a third oil groove on the high-speed shaft side of the lifting gearbox box. Through the cooperation of these three oil grooves, effective lubrication of the bearing is achieved, ensuring that the lubrication effect can be maintained regardless of how the platform is tilted.
It realizes sufficient lubrication of the bearing when the jack-up platform is largely inclined, ensures the normal operation of the gearbox, and has a simple structure and high reliability.
Smart Images
Figure CN223120583U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of speed reducers, in particular to a lubricating structure for a lifting speed reducer. Background Art
[0002] During the ship lifting process of a jack-up platform, when the jacking legs encounter a layered foundation with a soft stratum under a hard stratum, piercing may occur. After piercing, when the jack-up platform reaches a maximum inclination of 15°, if the platform is to be returned to a stable state, the lifting unit speed reducer in the jack-up platform needs to work properly. The speed reducer is divided into a high-speed shaft side and a low-speed shaft side. Small bearings are generally used for the bearings on the high-speed shaft side, and large bearings are generally used for the bearings on the low-speed shaft side. In the case of inclination, the bearing specifications on the high-speed shaft side of the speed reducer are small and cannot be immersed in the lubricating oil, resulting in insufficient lubrication of the bearings by the lubricating oil. In response to this problem, in the existing solutions, one solution is to increase the oil level of the lubricating oil in the speed reducer to ensure that the bearings are immersed in the lubricating oil when the jack-up platform is inclined to a large extent. However, the speed reducer has a breather cap, and when the platform is inclined to a large extent, increasing the oil level of the lubricating oil in the speed reducer may cause the lubricating oil to overflow from the breather cap. Another solution is to add a lubrication system to pump out the lubricating oil in the speed reducer and circulate it to the bearings that need to be lubricated in the speed reducer through the lubrication system. However, the lubrication system has a complex structure, low reliability, high cost, and is prone to leakage.
[0003] Therefore, the utility model proposes a lubricating structure for a lifting speed reducer to solve the above problems. Summary of the Utility Model
[0004] The technical problem to be solved by the utility model is to provide a lubricating structure for a lifting speed reducer, which can not only fully lubricate the bearings when the jack-up platform is inclined to a large extent, but also has a simple structure and high reliability.
[0005] To solve the above technical problem, the technical solution of the utility model is: a lubricating structure for a lifting speed reducer, the two sides inside the box body of the lifting speed reducer are respectively a high-speed shaft side and a low-speed shaft side. A gear and a high-speed shaft are arranged on the high-speed shaft side. The gear is fixedly installed on the high-speed shaft. The two sides of the high-speed shaft are respectively installed on the box body of the lifting speed reducer through a first bearing and a second bearing. The innovation lies in that: the lubricating structure is arranged on the high-speed shaft side of the box body of the lifting speed reducer. The lubricating structure includes a first oil groove for lubricating the first bearing, a second oil groove for collecting the lubricating oil splashed by the rotation of the gear, and a third oil groove for lubricating the second bearing. The first oil groove and the third oil groove are respectively arranged on both sides of the second oil groove and are both communicated with the second oil groove. The first oil groove is communicated with the first bearing, and the third oil groove is communicated with the second bearing.
[0006] Further, the second oil sump includes a left inclined section and a right inclined section that communicate with each other. The left inclined section is arranged on the side of the right inclined section closer to the first oil sump. The left inclined section inclines downward from top to bottom towards the direction close to the first oil sump and communicates with the first oil sump. The right inclined section inclines downward from top to bottom towards the direction close to the third oil sump and communicates with the third oil sump.
[0007] Further, the included angle between the left inclined section and the horizontal direction is 40 - 45°, and the included angle between the right inclined section and the horizontal direction is 10 - 20°.
[0008] Further, the included angle between the left inclined section and the horizontal direction is 42°, and the included angle between the right inclined section and the horizontal direction is 15°.
[0009] The advantages of the present utility model are as follows:
[0010] (1) By designing the first oil sump, the second oil sump and the third oil sump on the high-speed shaft side of the lifting reduction gearbox housing, through the mutual cooperation of the three oil sumps, no matter the jack-up platform tilts forward, backward, left or right, it can play a good lubricating role for the bearings, thus ensuring the normal operation of the reduction gearbox. The structure is simple and the reliability is high.
[0011] (2) The second oil sump of the present utility model is designed as a sharp-cornered structure composed of two inclined sections, so that the lubricating oil splashed by the rotating gear can be well shunted and quickly flow to the first oil sump and the third oil sump, improving the lubrication effect and efficiency.
[0012] (3) The included angle between the left inclined section of the second oil sump of the present utility model and the horizontal direction is 40 - 45°, and the included angle between the right inclined section and the horizontal direction is 10 - 20°. Within this angle range, a better lubrication effect can be achieved.
[0013] (4) The included angle between the left inclined section of the present utility model and the horizontal direction is 42°, and the included angle between the right inclined section and the horizontal direction is 15°, which can better adapt to the situation where the jack-up platform tilts to 15°, ensuring the best lubrication effect for the two bearings. Description of the Drawings
[0014] The following further describes the present utility model in detail in conjunction with the drawings and specific embodiments.
[0015] Figure 1 It is the external structure diagram of the lifting reduction gearbox of the present utility model.
[0016] Figure 2 It is the lubrication structure principle diagram of the lifting reduction gearbox of the present utility model. Specific Embodiments
[0017] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, detail the specific implementation manners, structures, features and their effects of the present utility model as follows.
[0018] Embodiment
[0019] As Figure 1-2 shown, this embodiment provides a lifting reduction gear lubrication structure. On both sides inside the housing of the lifting reduction gear are the high-speed shaft side and the low-speed shaft side. On the high-speed shaft side, there is a gear 4 and a high-speed shaft. The gear 4 is fixedly installed on the high-speed shaft. The two sides of the high-speed shaft are respectively installed on the housing of the lifting reduction gear through a first bearing 1 and a second bearing 6. The lubrication structure is arranged on the high-speed shaft side of the housing of the lifting reduction gear. The lubrication structure includes a first oil groove 2 for lubricating the first bearing 1, a second oil groove 3 for collecting the lubricating oil splashed out by the rotation of the gear, and a third oil groove 5 for lubricating the second bearing. The first oil groove 2 and the third oil groove 5 are respectively arranged on both sides of the second oil groove 3 and are both communicated with the second oil groove 3. The first oil groove 2 is communicated with the first bearing 1, and the third oil groove 5 is communicated with the second bearing 6.
[0020] In this embodiment, the second oil groove 3 includes a left inclined section and a right inclined section that are mutually communicated. The left inclined section is arranged on the side of the right inclined section close to the first oil groove. The left inclined section inclines downward towards the direction close to the first oil groove 2 and is communicated with the first oil groove 2. The included angle between the left inclined section and the horizontal direction is 42°. The right inclined section inclines downward towards the direction close to the third oil groove 5 and is communicated with the third oil groove 5. The included angle between the right inclined section and the horizontal direction is 15°.
[0021] In this embodiment, when the jack-up platform inclines towards the high-speed shaft side of the housing of the lifting reduction gear, it is called forward inclination; when it inclines towards the low-speed shaft side of the housing of the lifting reduction gear, it is called backward inclination; when it inclines towards the direction close to the first bearing 1, it is called left inclination; when it inclines towards the direction close to the second bearing 6, it is called right inclination. The directions of forward and backward inclination and left and right inclination are perpendicular.
[0022] When the jack-up platform inclines forward by 15°, the lubricating oil in the housing of the lifting reduction gear tends to the high-speed shaft side. Both the first bearing and the second bearing are in the lubricating oil, and the bearings on the low-speed shaft side in the housing adopt large bearings, and the rollers of the bearings can also be ensured to be in the lubricating oil, meeting the lubrication requirements of the housing of the lifting reduction gear;
[0023] When the jack-up platform tilts backward by 15°, the lubricating oil in the lifting reduction gearbox body biases towards the low-speed shaft side. The first bearing and the second bearing on the high-speed shaft side adopt small-sized bearings, and the rollers of the first bearing and the second bearing cannot be immersed in the lubricating oil. At this time, the lubricating oil splashed by the rotation of the gear 4 falls into the second oil groove 3, and then flows from the second oil groove 3 to the first oil groove 2 and the third oil groove 5. When the first oil groove 2 and the third oil groove 5 are filled with lubricating oil, the first bearing 1 and the second bearing 6 can be lubricated;
[0024] When the jack-up platform tilts leftward or rightward by 15°, the bearings on the low-speed shaft side in the box body adopt large-sized bearings, which can ensure being in the lubricating oil. However, due to the relatively small specifications, the rollers of the first bearing and the second bearing on the high-speed shaft side cannot be immersed in the lubricating oil. At this time, the lubricating oil splashed by the rotation of the gear 4 falls into the second oil groove 3, and then flows from the second oil groove 3 to the first oil groove 2 and the third oil groove 5. When the first oil groove 2 and the third oil groove 5 are filled with lubricating oil, the first bearing 1 and the second bearing 6 can be lubricated.
[0025] The lubrication structure of the present utility model, through the mutual cooperation of the three oil grooves, enables good lubrication of the bearings regardless of whether the jack-up platform tilts forward, backward, leftward or rightward, thus ensuring the normal operation of the reduction gearbox. The structure is simple and has high reliability.
[0026] The above are only the preferred embodiments of the present utility model and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed as above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to form equivalent embodiments with equivalent changes within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims
1. A lubrication structure for a lifting reduction gearbox. On both sides inside the box body of the lifting reduction gearbox are respectively a high-speed shaft side and a low-speed shaft side. On the high-speed shaft side, there is a gear and a high-speed shaft. The gear is fixedly installed on the high-speed shaft. Both sides of the high-speed shaft are respectively installed on the box body of the lifting reduction gearbox through a first bearing and a second bearing. It is characterized in that: The lubrication structure is arranged on the high-speed shaft side of the lifting reduction gearbox housing. The lubrication structure includes a first oil groove for lubricating the first bearing, a second oil groove for collecting the lubricating oil splashed by the rotation of the gear, and a third oil groove for lubricating the second bearing. The first oil groove and the third oil groove are respectively arranged on both sides of the second oil groove and are both communicated with the second oil groove. The first oil groove is communicated with the first bearing, and the third oil groove is communicated with the second bearing.
2. The lubrication structure of the lifting speed reducer according to claim 1, wherein: The second oil groove includes a left inclined section and a right inclined section that are communicated with each other. The left inclined section is arranged on the side of the right inclined section close to the first oil groove. The left inclined section inclines downward from top to bottom towards the direction close to the first oil groove and is communicated with the first oil groove. The right inclined section inclines downward from top to bottom towards the direction close to the third oil groove and is communicated with the third oil groove.
3. The lifting speed reducer lubrication structure according to claim 2, wherein: The included angle between the left inclined section and the horizontal direction is 40 - 45°, and the included angle between the right inclined section and the horizontal direction is 10 - 20°.
4. The lubrication structure of the lifting reduction gearbox according to claim 3, characterized in that: The included angle between the left inclined section and the horizontal direction is 42°, and the included angle between the right inclined section and the horizontal direction is 15°.