Integrated motor yaw speed reducer

Abstract

The utility model discloses an integrated motor yaw speed reducer, relates to the technical field of motor structures of yaw variable pitch gearboxes, and can effectively reduce the total height of a motor and the speed reducer, effectively improve the power density of the speed reducer and effectively avoid the oil leakage phenomenon of an input end on the premise of meeting the use requirements of the yaw speed reducer. In the integrated motor yaw speed reducer, a motor output shaft is supported through a motor input end ball bearing and a ball bearing and is in interference connection with a sun gear; vent holes are formed in the center of the sun gear and the side edge of the gear, and an ejector block is assembled at the lower end of the sun gear. The output end of the motor is double-sealed by adopting a framework oil seal and an O-shaped sealing ring; the planet gear is connected with the planet carrier through a cylindrical roller bearing without an outer ring, torque and rotating speed are transmitted to the planet gear through the sun gear, and the planet carrier is driven by the planet gear to achieve transmission meshing of planet components.

Description

Technical Field

[0001] The utility model relates to the technical field of motor structures of yaw and pitch gear boxes, and in particular to an integrated motor yaw reducer. Background Art

[0002] In 2020, my country announced it would adopt more forceful policies and measures to achieve carbon peak by 2030 and carbon neutrality by 2060. Against the backdrop of the "dual carbon" initiative, my country's wind power industry has shifted from extensive quantitative expansion to improving quality and reducing costs, entering a new stage of sustained and stable growth.

[0003] As my country's onshore wind power construction technology matures, national wind power development policies are gradually shifting toward offshore power generation. Currently, domestic offshore wind power primarily consists of units below 8 MW, with units 10 MW and above still in their infancy. At the same time, domestic offshore wind power is gradually expanding from nearshore to offshore, with a rapidly increasing number of turbines and harsh operating environments, placing higher demands on the corrosion resistance, size, and power density of reducers.

[0004] In the prior art, the yaw reducer motor and the upper body require a motor base, a coupling, a deep groove ball bearing, and a shaft retaining ring and a hole retaining ring to connect them to achieve the transmission of speed and torque. Specifically, a coupling is required between the motor output shaft and the first-stage sun gear for transfer. The coupling and the motor output shaft are connected by a flat key, and the axial clearance of the flat key connection is large. The coupling and the first-stage sun gear are connected by a spline, and this spline connection is a clearance fit, resulting in poor concentricity between the motor shaft and the first-stage sun gear. The reducer swings greatly during operation, and the reducer gear pair wears, vibrates, and makes noise, thereby reducing the overall mechanical performance of the reducer. In addition, the inner cavity of the motor base is open, and a ventilator is installed on the motor base boss. If the reducer is tilted or placed horizontally during hoisting, transportation, or assembly, lubricating oil will overflow from the ventilator, directly affecting the appearance of the reducer. If the lubricating oil leaks a lot, it will directly affect the operation of the reducer.

[0005] Therefore, how to provide an integrated motor yaw reducer that can effectively reduce the total height of the motor and reducer and effectively improve the power density of the reducer while effectively avoiding oil leakage at the input end while meeting the use requirements of the yaw reducer has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0006] The purpose of the utility model is to provide an integrated motor yaw reducer, which eliminates the motor base component in the prior art, effectively reduces the total height of the reducer while keeping the motor cost and height unchanged, reduces the overall weight of the reducer, and reduces the amount of oil required, thereby solving the size limitation of the offshore yaw reducer fan, effectively improving the power density of the reducer, realizing a lightweight design of the reducer, and effectively avoiding oil leakage at the input end.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An integrated motor yaw reducer, wherein the motor output shaft is supported by a ball bearing and a ball bearing at the motor input end, and is interference-connected to the sun gear; vent holes are provided in the center of the sun gear and on the side of the gear, and a top block is assembled at the lower end of the sun gear; the motor output end is double-sealed with a skeleton oil seal and an O-ring;

[0009] The planetary gears are connected to the planetary carrier via cylindrical roller bearings without outer rings. The torque and speed are transmitted to the planetary gears via the sun gear, and the planetary gears drive the planetary carrier to achieve transmission engagement of the planetary components.

[0010] In actual application, the outer ringless cylindrical roller bearing retaining ring is used to axially limit the planetary gear, and the ball bearing is axially positioned by a retaining ring through the hole.

[0011] The interior of the planetary carrier is equipped with a baffle and a spherical top, and the spherical top adopts a spherical structure.

[0012] Specifically, the round oil mark adopts a transparent viewing window for judging and observing the amount of lubricating oil.

[0013] Furthermore, the motor base and the reducer body are connected by bolts.

[0014] Compared with the prior art, the integrated motor yaw reducer described in the present invention has the following advantages:

[0015] In the integrated motor yaw reducer provided by the utility model, since the motor output shaft is supported by the ball bearings and ball bearings at the motor input end and is interference-connected with the sun gear, the use of two bearing supports can effectively reduce the deflection of the input end parts, and the interference connection can effectively improve the concentricity of the motor and the high-speed gear; ventilation holes are provided in the center of the sun gear and the side of the gear to effectively avoid the air holding phenomenon during the interference connection assembly; and the lower end of the sun gear is equipped with a top block, which has high wear resistance and high hardness to effectively ensure that the reducer is not damaged throughout its life cycle; the output end of the motor is double-sealed with a skeleton oil seal and an O-ring to effectively ensure the sealing of the lubricating oil and avoid corrosion of the reducer by the harsh marine environment; the planetary gear is connected to the planetary carrier through a cylindrical roller bearing without an outer ring, and the torque and speed are transmitted to the planetary gear through the sun gear, and the planetary gear drives the planetary carrier to realize the transmission engagement of the planetary components; therefore, the integrated motor yaw reducer provided by the utility model, The motor seat, socket and ball bearing in the prior art have been eliminated, and the output shaft of the motor and the first-stage sun gear are interference-connected, which effectively reduces the total height of the yaw motor and yaw reducer, as well as the weight of the reducer, and effectively improves the power density; the motor output end is equipped with a skeleton oil seal, and the motor flange end cover stop is equipped with an O-ring, which effectively ensures oil leakage at the input end of the motor and reducer through double sealing; and no ventilator is provided, which can effectively prevent salt spray and water vapor from entering the reducer cavity and causing rust on the internal parts of the reducer; at the same time, the two-stage gap connection in the prior art is merged into a one-stage interference connection, which effectively reduces the input end deflection, makes the gear meshing smoother, and reduces the noise and vibration of the reducer; in addition, the motor and the first-stage sun gear are interference-connected, and the output shaft diameter of the motor is a standard specification. It is only necessary to adjust the diameter and length of the sun gear interference according to the reducer clearance requirements, so that it has better versatility and can effectively solve the problems of long reducer production cycle and stagnant inventory. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of the integrated motor yaw reducer provided in an embodiment of the utility model.

[0017] Reference numerals:

[0018] 1-motor output shaft; 2-hole retaining ring; 3-ball bearing; 4-skeleton oil seal; 5-motor; 6-sun gear; 7-planet gear; 8-cylindrical roller bearing without outer ring; 9-retaining ring for cylindrical roller bearing without outer ring; 10-planet carrier; 11-round oil mark; 12-baffle; 13-bolt; 14-ball top; 15-top block; 16-O-ring; 17-ball bearing at the motor input end. DETAILED DESCRIPTION

[0019] For ease of understanding, the integrated motor yaw reducer provided by an embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.

[0020] The present invention provides an integrated motor yaw reducer. Figure 1 As shown, the motor output shaft 1 is supported by the ball bearing 17 and the ball bearing 3 at the motor input end, and is interference-connected with the sun gear 6; vent holes are provided in the center and on the side of the gear of the sun gear 6, and a top block 15 is assembled at the lower end of the sun gear 6; the output end of the motor 5 is double-sealed with a skeleton oil seal 4 and an O-ring 16;

[0021] The planetary gears 7 are connected to the planetary carrier 10 through the outer ringless cylindrical roller bearings 8. The torque and speed are transmitted to the planetary gears 7 through the sun gear 6, and the planetary gears 7 drive the planetary carrier 10 to achieve transmission engagement of the planetary components.

[0022] Compared with the prior art, the integrated motor yaw reducer described in the embodiment of the present utility model has the following advantages:

[0023] In the integrated motor yaw reducer provided by the embodiment of the present invention, since the motor output shaft 1 is supported by the ball bearing 17 and the ball bearing 3 at the motor input end and is interference-connected with the sun gear 6, the use of two bearing supports can effectively reduce the deflection of the input end parts, and the interference connection can effectively improve the concentricity of the motor and the high-speed gear; the center of the sun gear 6 and the side of the gear are provided with ventilation holes to effectively avoid the air holding phenomenon during the interference connection assembly; and the lower end of the sun gear 6 is equipped with a top block 15, which has high wear resistance and high hardness to effectively ensure that the reducer is not damaged throughout its life cycle; the output end of the motor 5 is double-sealed with a skeleton oil seal 4 and an O-ring 16 to effectively ensure the sealing of the lubricating oil and avoid corrosion of the reducer by the harsh marine environment; the planetary gear 7 is connected to the planetary carrier 10 through a cylindrical roller bearing 8 without an outer ring, and the torque and speed are transmitted to the planetary gear 7 through the sun gear 6, and the planetary gear 7 drives the planetary carrier 10 to realize the transmission engagement of the planetary components; therefore, the embodiment of the present invention The example provides an integrated motor yaw reducer, which eliminates the motor seat, socket and ball bearing in the prior art, and makes an interference fit between the motor's output shaft and the first-stage sun gear, thereby effectively reducing the total height of the yaw motor and yaw reducer, as well as the weight of the reducer, and effectively improving the power density; the motor output end is equipped with a skeleton oil seal, and the motor flange end cover stop is equipped with an O-ring, which effectively ensures oil leakage at the motor and reducer input ends through double sealing; and no ventilator is provided, which can effectively prevent salt spray and water vapor from entering the reducer cavity and causing rust on the internal parts of the reducer; at the same time, the two-stage gap connection in the prior art is merged into a one-stage interference fit, thereby effectively reducing the input end deflection, making the gear meshing smoother, and reducing the reducer noise and vibration; in addition, the motor and the first-stage sun gear are interference fit, and the motor's output shaft diameter is a standard specification. It only needs to adjust the diameter and length of the sun gear interference fit according to the reducer clearance requirements, thereby having better versatility and effectively solving the problems of long reducer production cycle and stagnant inventory.

[0024] In actual application, such as Figure 1 As shown, the planetary gear 7 can be axially limited by the outer ringless cylindrical roller bearing retaining ring 9, and the ball bearing 3 can be axially positioned by the hole retaining ring 2.

[0025] Among them, Figure 1 As shown, the interior of the planetary carrier 10 can be equipped with a baffle 12 and a spherical top 14, and the spherical top 14 can adopt a special spherical structure with high hardness and good wear resistance, thereby effectively reducing the unbalanced load of the planetary components and effectively solving the problem of parts with different linear speeds being worn out and pulling out grooves.

[0026] Specifically, if Figure 1As shown, the round oil mark 11 can adopt a transparent viewing window, so that it can be used to judge and observe the amount of lubricating oil.

[0027] Furthermore, if Figure 1 As shown, the motor base and the reducer body can be connected by bolts 13, thereby eliminating the need for a first-level bolt, making assembly simple and efficient.

[0028] It should be noted here that the structure in the prior art requires the motor base, the connecting sleeve and the deep groove ball bearing, the shaft retaining ring, the hole retaining ring and the first-stage sun gear to be assembled into a motor base component, and then the motor base component and the reducer body are fixed and assembled by bolts, and then the motor is installed on the motor base component.

[0029] In summary, the integrated motor yaw reducer provided by the embodiment of the present invention has the following advantages:

[0030] 1. The motor base component is eliminated, which reduces the reducer height, weight and cost, improves the reducer power density, and achieves a lightweight design;

[0031] 2. The number of parts is reduced, the assembly is simple and efficient, and the manufacturing cost of the reducer is reduced;

[0032] 3. Double sealing is adopted, which has good sealing performance and improves the anti-corrosion performance of the reducer;

[0033] 4. The motor output shaft is of standard specifications, which is more versatile and easy to organize mass production;

[0034] 5. The original two-stage gap connection is merged into a one-stage interference connection, which reduces the deflection of the input end, reduces the noise and vibration of the reducer, makes the gear meshing smoother, and improves the overall mechanical performance.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An integrated motor yaw reducer, characterized in that: The motor output shaft is supported by ball bearings and ball bearings at the motor input end, and is interference-connected to the sun gear. Ventilation holes are provided in the center of the sun gear and on the side of the gear, and a top block is installed at the lower end of the sun gear. The output end of the motor is double-sealed with a skeleton oil seal and an O-ring. The planetary gears are connected to the planetary carrier via cylindrical roller bearings without outer rings. The torque and speed are transmitted to the planetary gears via the sun gear, and the planetary gears drive the planetary carrier to achieve transmission engagement of the planetary components.

2. The integrated motor yaw reducer according to claim 1, characterized in that: The outer ringless cylindrical roller bearing retaining ring is used to axially limit the planetary gear, and the ball bearing is axially positioned by a retaining ring through the hole.

3. The integrated motor yaw reducer according to claim 1, characterized in that: The interior of the planet carrier is equipped with a baffle and a spherical top, and the spherical top adopts a spherical structure.

4. The integrated motor yaw reducer according to claim 1, characterized in that: The round oil mark adopts a transparent viewing window to judge and observe the amount of lubricating oil.

5. The integrated motor yaw reducer according to claim 1, characterized in that: The motor base and the reducer body are connected by bolts.

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