CN209839117U - Yaw gearbox input structure - Google Patents

Abstract

The utility model discloses an input structure of a yaw gearbox, which comprises a motor flange and a gearbox input flange connected by bolts. The gearbox input flange is connected with an input shaft through a bearing. The gearbox input method An oil mark is installed on the flange, and a vent cap installation hole is provided on the motor flange, and a vent cap is installed in the vent cap installation hole; a groove is provided on the input shaft near its upper end. The oil seal on the input shaft is canceled, and the temperature rise of the lubricating oil is reduced after the lip of the oil seal does not rub against the input shaft, thereby reducing the expansion of the lubricating oil, and the surface of the input shaft does not need to be hardened, further saving At the same time, installing the vent cap on the motor flange increases the expansion space of the lubricating oil, effectively preventing the lubricating oil from leaking from the vent cap, and setting a groove on the input shaft, which effectively prevents the lubricating oil from rising along the input shaft and prevents the lubricating oil from Splash onto other parts.

Description

Yaw gearbox input structure

technical field

The utility model relates to the technical field of gearboxes, in particular to an input structure of a yaw gearbox.

Background technique

The yaw gearbox is one of the key components of the wind turbine. Its basic function is to change and transmit the speed and torque of the yaw motor, thereby driving the nacelle to rotate and ensuring that the wind turbine can be aligned with the wind direction in time. According to the working conditions of the yaw gearbox, the sealing structure of the input end is sealed with a lip-shaped skeleton oil seal. The existing structure is shown in Figure 1, the motor mounting flange (1) is connected with the gearbox input flange (2) through screws; the gearbox input flange (2) is equipped with an oil standard (3) and a breather cap ( 8), the lubricating oil of the general yaw gearbox is added to the middle position of the oil mark (3), the breather cap (8) can balance the internal pressure of the gearbox, the input shaft (4) passes through the bearing (6) and the gearbox input flange ( 2) Connection; the oil seal (5) is installed between the input flange (2) and the input shaft (4) of the gearbox, and an oil film will be generated after the lip of the oil seal (5) and the input shaft (4) move relative to each other, thereby playing a role The function of sealing oil, the input shaft (4) is respectively connected with the motor shaft and the internal parts of the transmission gearbox, and transmits the torque and speed of the motor to other parts of the gearbox.

The sealing of the input end of the existing yaw gearbox depends on the contact between the lip of the oil seal (5) and the input shaft (4). Since the yaw gearbox always works in a vertical state, the lip of the oil seal cannot be fully sealed Lubrication, the relative friction between the oil seal lip and the input shaft will generate relatively large heat. When the ambient temperature and the operating temperature of the gearbox increase, the lubricating oil will expand due to heat. With the high-speed operation of the gearbox, the air will be stirred into the lubricating oil , so as to further increase the volume of lubricating oil, and because the space between the lubricating oil level and the vent cap is limited, the lubricating oil will leak from the vent cap when it expands too much.

Contents of the invention

Aiming at the technical problems existing at present, the utility model provides a yaw gearbox input structure with reasonable structural design and the ability to avoid lubricating oil leaking from the vent cap.

In order to achieve the above-mentioned purpose of the invention, the utility model provides the following technical solutions:

An input structure of a yaw gearbox, including a motor flange and a gearbox input flange connected by bolts, the gearbox input flange is connected with an input shaft through a bearing, and the gearbox input flange is installed with an oil A vent cap installation hole is provided on the motor flange, and a vent cap is installed in the vent cap installation hole;

A ring of grooves is arranged on the input shaft near its upper end.

Adopting the above technical scheme, the oil seal on the input shaft is eliminated, and the temperature rise of the lubricating oil is reduced after the friction between the lip of the oil seal and the input shaft, thereby reducing the expansion of the lubricating oil. After the oil seal is eliminated, the input shaft and the oil seal cooperate The surface does not require special treatment, which reduces the processing steps and further saves costs. At the same time, the vent cap is installed on the motor flange to increase the expansion space of the lubricating oil, effectively preventing the lubricating oil from leaking from the vent cap, and setting a groove on the input shaft , effectively preventing the lubricating oil from rising along the input shaft and preventing the lubricating oil from splashing to other parts.

Preferably, an installation groove is provided on the surface of the input flange of the gearbox that is in contact with the motor flange, and an annular sealing ring is installed in the installation groove.

Such arrangement seals the joint surface of the motor flange and the input flange of the gearbox to prevent the lubricating oil from leaking from the joint surface after it expands and rises.

Preferably, an elastic circlip is arranged on the outer periphery of the input shaft, and the elastic circlip is blocked at the upper end surface of the bearing.

Compared with the prior art, the utility model has the beneficial effects:

1. The utility model cancels the oil seal at the input end of the yaw gearbox, reduces the temperature of the lubricating oil, thereby reducing the expansion of the lubricating oil, and the surface of the input shaft does not need to be hardened, which reduces the processing steps and reduces the manufacturing cost;

2. Install the vent cap on the motor flange, move the vent cap position up to increase the expansion space of the lubricating oil, effectively avoiding the leakage of the lubricating oil from the vent cap;

3. A groove is added on the input shaft, which effectively prevents the lubricating oil from rising along the input shaft when the input shaft rotates, and prevents the lubricating oil from splashing to other parts.

Description of drawings:

Fig. 1 is the structural representation of prior art;

Fig. 2 is a structural schematic diagram of the utility model.

Detailed ways

The utility model will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned themes of the present utility model is limited to the following embodiments, and all technologies realized based on the content of the present utility model belong to the scope of the present utility model.

The yaw gearbox input structure shown in Figure 2 includes a motor flange 1 and a gearbox input flange 2 connected by bolts. The gearbox input flange 2 is connected with an input shaft 4 through a bearing 6, and the gear An oil mark 3 is installed on the tank input flange 2, and a vent cap installation hole is provided on the motor flange 1, and the vent cap installation hole communicates with the cavity of the motor flange 1, and a vent cap 8 is installed in the vent cap installation hole ; On the input shaft 4, a groove 10 is arranged near its upper end, and a circlip 7 is installed on the outer periphery of the input shaft 4, the upper end of the bearing 6 is against the circlip 7, and its lower end is against the input on the shoulder of axis 4.

A mounting groove is provided on the surface of the input flange 2 of the gearbox that is in contact with the motor flange 1, and an annular sealing ring 9 is installed in the mounting groove.

Claims (3)

1. The utility model provides a yaw gear box input structure, includes motor flange (1) and gear box input flange (2) that get up through bolted connection, is connected with input shaft (4) through bearing (6) on this gear box input flange (2), install oil pointer (3) on gear box input flange (2), its characterized in that: a vent cap mounting hole is formed in the motor flange (1), and a vent cap (8) is mounted in the vent cap mounting hole;

a circle of groove (10) is arranged on the input shaft (4) near the upper end of the input shaft.

2. The yaw gearbox input structure of claim 1, wherein: and a mounting groove is formed in the surface, which is in contact with the motor flange (1), of the gear box input flange (2), and an annular sealing ring (9) is mounted in the mounting groove.

3. A yaw gearbox input structure according to claim 1 or 2, characterized in that: a circlip (7) is provided on the outer periphery of the input shaft (4), and the circlip (7) is stopped at the upper end surface of the bearing (6).