Tubular shaft sealing structure of wind power gear box

Abstract

The utility model provides a tubular shaft sealing structure of a wind power gear box. The tubular shaft sealing structure is characterized in that a tubular shaft penetrates through a shaft hole of a sun gear and a shaft hole of a planet carrier; the shaft neck of the flange is inserted into the shaft hole of the planet carrier, the tubular shaft penetrates through the shaft hole of the flange, the outer wall of the shaft neck of the flange is matched with the shaft hole of the planet carrier, and the shaft hole of the flange is matched with the outer wall of the tubular shaft; the flange and the stop block are fixedly mounted on the planet carrier; the end part of the tubular shaft penetrates through the shaft hole of the stop block, and a rotation stopping surface arranged at the end part of the tubular shaft is matched with a rotation stopping surface arranged at the shaft hole of the stop block; an O-shaped ring is arranged at the joint of a flange plate of the flange and the end face of the planet carrier for radial sealing; the shaft neck of the flange and the shaft hole of the planet carrier are axially sealed by an O-shaped ring; and the shaft hole of the flange and the outer wall of the tubular shaft are axially sealed by an O-shaped ring. According to the utility model, the oil leakage fault of the gear box caused by the leakage of lubricating oil from the joint of the tubular shaft and the planet carrier in the operation process of the gear box is prevented.

Description

Technical Field

[0001] The utility model relates to the field of wind power gear boxes, in particular to a wind power gear box pipe shaft sealing structure. Background Art

[0002] Wind power generation has developed rapidly in recent years due to its advantages such as zero pollution and low construction cost.

[0003] In the wind turbine gearbox, the sun gear is fixedly mounted on the tube shaft. The rotation of the wind turbine blades is transmitted to the planetary carrier, which drives the planetary gears and sun gear in the planetary gear pair to rotate. The sun gear ultimately drives the generator through a transmission chain.

[0004] During the operation of the wind turbine gearbox, due to the sealing defects at the tube shaft and the planetary carrier, it is easy to cause lubricating oil to leak out, thereby contaminating the gearbox and the main engine cabin. It is now necessary to ensure the sealing of this part to avoid oil leakage failure in the gearbox. Utility Model Content

[0005] The utility model provides a wind power gear box pipe shaft sealing structure, which aims to solve the shortcomings of the prior art and prevent lubricating oil from seeping out from the joint of the pipe shaft and the planetary frame during the operation of the gear box, thereby causing oil leakage failure of the gear box.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A wind power gearbox pipe shaft sealing structure, characterized by:

[0008] The tube shaft passes through the shaft hole of the sun gear and the shaft hole of the planet carrier;

[0009] The journal of the flange is inserted into the shaft hole of the planet carrier, the tube shaft passes through the shaft hole of the flange, the outer wall of the journal of the flange is matched with the shaft hole of the planet carrier, and the shaft hole of the flange is matched with the outer wall of the tube shaft;

[0010] The flange and the stop block are fixedly installed on the planet carrier;

[0011] The end of the tube shaft passes through the shaft hole of the stop block, and the anti-rotation surface provided at the end of the tube shaft matches with the anti-rotation surface provided at the shaft hole of the stop block;

[0012] An O-ring is installed at the joint between the flange plate of the flange and the end face of the planet carrier for radial sealing;

[0013] The flange journal and the planet carrier shaft hole are axially sealed with an O-ring;

[0014] The axial hole of the flange and the outer wall of the pipe shaft are axially sealed with an O-ring.

[0015] The end of the tube shaft is provided with two anti-rotation surfaces symmetrical with respect to the axis, and the axial hole of the stop block is provided with two anti-rotation surfaces symmetrical with respect to the axis. The two anti-rotation surfaces of the tube shaft are matched with the two anti-rotation surfaces of the stop block respectively.

[0016] The bolts pass through the through holes of the stop block and the through holes on the flange plate of the flange and are screwed into the screw holes on the end surface of the planet carrier, thereby fixing the stop block and the flange on the planet carrier.

[0017] The cylindrical pin passes through the pin hole of the stop block, the pin hole on the flange plate of the flange, and the pin hole on the end surface of the planet carrier, so as to fix the stop block and the flange on the planet carrier.

[0018] The journal of the flange and the shaft hole of the planet carrier are axially sealed by a second O-ring and a third O-ring.

[0019] The axial hole of the flange and the outer wall of the pipe shaft are axially sealed by a fourth O-ring and a fifth O-ring.

[0020] The utility model is beneficial in that:

[0021] The utility model provides a structural basis for adding an O-ring by adding a flange and a stop block structure, thereby preventing lubricating oil from seeping out from the joint of the tube shaft and the planetary frame during the operation of the gear box, thereby preventing the gear box from leaking oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a schematic cross-sectional view of the structure of the utility model;

[0024] Figure 2 for Figure 1 A-direction view. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the technical solution of the utility model, the following will briefly introduce the drawings required for the description. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without creative work. In order to facilitate the understanding of the utility model, the following will be combined with the drawings and specific embodiments to explain the utility model in more detail.

[0026] It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more centered elements can exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more centered elements can exist between them. The terms "upper", "lower", "inner", "outer", "bottom", etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] like Figure 1 , Figure 2 As shown:

[0028] The tube shaft 6 is installed from the generator side and passes through the shaft hole of the sun gear 1 and the shaft hole 20 of the planet carrier 2 .

[0029] The journal of the flange 5 is inserted into the shaft hole 20 of the planet carrier 2 , the tube shaft 6 passes through the shaft hole of the flange 5 , the outer wall of the journal of the flange 5 matches with the shaft hole 20 of the planet carrier, and the shaft hole of the flange 5 matches with the outer wall of the tube shaft 6 .

[0030] The end of the tube shaft 6 is provided with two stop surfaces 63 symmetrical with respect to the axis, the axial hole of the stop block 3 is provided with two stop surfaces 33 symmetrical with respect to the axis, the end of the tube shaft 6 passes through the axial hole 30 of the stop block 3, and the two stop surfaces 63 of the tube shaft 6 are respectively matched with the two stop surfaces 33 of the stop block 3.

[0031] Four bolts 4 evenly distributed around the axis of the stop block 3 respectively pass through the four through holes 31 of the stop block 3 and the four through holes 51 opened on the flange plate of the flange 5 and then are screwed into the four screw holes 21 opened on the end surface of the planet carrier 2.

[0032] Two cylindrical pins 7 symmetrically distributed with respect to the axis of the stop block 3 respectively pass through the two pin holes 32 of the stop block 3 , the two pin holes 52 opened on the flange plate of the flange 5 , and the two pin holes 22 opened on the end surface of the planet carrier 2 .

[0033] Thus, the flange 5 and the stop block 3 are fixedly installed and positioned on the planet carrier 2 by bolts 4 and cylindrical pins 7.

[0034] In this way, the stopper 3 prevents the rotation of the tubular shaft 6 , and the stopper 3 and the flange 5 provide a structural basis for installing the O-ring on the planet carrier 2 and the tubular shaft 6 .

[0035] A first O-ring 8 is installed at the junction of the flange plate of the flange 5 and the end surface of the planet carrier 2 for radial sealing.

[0036] The journal of the flange 5 and the shaft hole 20 of the planet carrier 2 are axially sealed by a second O-ring 9 and a third O-ring 10 .

[0037] The axial hole of the flange 5 and the outer wall of the pipe shaft 6 are axially sealed by a fourth O-ring 11 and a fifth O-ring 12 .

[0038] The first O-ring 8 , the second O-ring 9 , the third O-ring 10 , the fourth O-ring 11 , and the fifth O-ring 12 form a reliable seal to prevent the lubricating oil from leaking out of the gear box at the end of the pipe shaft 6 close to the blade side.

[0039] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in this field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A wind turbine gearbox pipe shaft sealing structure, characterized in that: The tube shaft passes through the shaft hole of the sun gear and the shaft hole of the planetary carrier; the shaft neck of the flange is inserted into the shaft hole of the planetary carrier, the tube shaft passes through the shaft hole of the flange, the outer wall of the shaft neck of the flange matches with the shaft hole of the planetary carrier, and the shaft hole of the flange matches with the outer wall of the tube shaft; the flange and the stop block are fixedly installed on the planetary carrier; the end of the tube shaft passes through the shaft hole of the stop block, and the anti-rotation surface opened at the end of the tube shaft matches with the anti-rotation surface opened in the shaft hole of the stop block; an O-ring is installed at the joint between the flange plate of the flange and the end face of the planetary carrier for radial sealing; the shaft neck of the flange and the shaft hole of the planetary carrier are axially sealed with an O-ring; the shaft hole of the flange and the outer wall of the tube shaft are axially sealed with an O-ring.

2. A wind turbine gearbox pipe shaft sealing structure according to claim 1, characterized in that: The end of the tube shaft is provided with two anti-rotation surfaces symmetrical with respect to the axis, and the axial hole of the stop block is provided with two anti-rotation surfaces symmetrical with respect to the axis. The two anti-rotation surfaces of the tube shaft are matched with the two anti-rotation surfaces of the stop block respectively.

3. A wind turbine gearbox pipe shaft sealing structure according to claim 1, characterized in that: The bolts pass through the through holes of the stop block and the through holes on the flange plate of the flange and are screwed into the screw holes on the end surface of the planet carrier, thereby fixing the stop block and the flange on the planet carrier.

4. A wind turbine gearbox pipe shaft sealing structure according to claim 1, characterized in that: The cylindrical pin passes through the pin hole of the stop block, the pin hole on the flange plate of the flange, and the pin hole on the end surface of the planet carrier, so as to fix the stop block and the flange on the planet carrier.

5. A wind turbine gearbox pipe shaft sealing structure according to claim 1, characterized in that: The journal of the flange and the shaft hole of the planet carrier are axially sealed by a second O-ring and a third O-ring.

6. A wind turbine gearbox pipe shaft sealing structure according to claim 1, characterized in that: The axial hole of the flange and the outer wall of the pipe shaft are axially sealed by a fourth O-ring and a fifth O-ring.

Images