CN221170674U - Wind power semi-direct-drive gear box and output shaft sealing structure thereof - Google Patents

Abstract

The utility model discloses a wind power semi-direct-drive gear box and an output shaft sealing structure thereof, wherein the wind power semi-direct-drive gear box output shaft sealing structure comprises an end cover, the inner side of the end cover is used for being connected with a box body, a gear box output shaft penetrates through the inner cavity of the end cover and extends out of the end cover, and the periphery of the gear box output shaft is in clearance fit with the inner cavity of the end cover; the sealing assembly comprises a plurality of sealing gaskets, a plurality of supporting gaskets and fastening pieces, wherein the plurality of sealing gaskets and the plurality of supporting gaskets are distributed in a staggered mode along the axial direction of the output shaft of the gear box, and the sealing gaskets are sleeved on the output shaft of the gear box in an interference fit mode to form split type sealing members, and the split type sealing members can be detachably arranged on the outer sides of the end covers through the fastening pieces. The utility model has high universality and is convenient to assemble and disassemble, the tightness of the output shaft of the gear box can be improved, the maintenance operation of the output shaft seal of the gear box is convenient, and the maintenance cost is saved.

Description

Wind power semi-direct-drive gear box and output shaft sealing structure thereof

Technical Field

The utility model relates to the technical field of wind power gear box oil seals, in particular to a wind power semi-direct drive gear box and an output shaft sealing structure thereof.

Background

The wind power semi-direct drive gear box has the characteristics of high transmission efficiency, compact structure and long service life, and is widely applied to wind turbines. However, the integrated design of the gear box and the motor of the wind power semi-direct drive gear box has the advantages that the output shaft of the gear box is exposed to the cooling air flow of the motor, and the output shaft needs to be sealed to prevent the condition that the air with positive pressure or negative pressure enters and exits the gear box to cause the leakage of lubricating oil in the gear box.

At present, a mechanical seal and skeleton oil seal mode is adopted for sealing, wherein the mechanical seal rotates through an output shaft, sealing force is generated between the output shaft and a bearing, namely friction pair sealing is realized, but the mechanical seal is complex in design structure, and in the machining process, if errors occur in machining size, two matched parts in the mechanical seal can not be assembled; the skeleton oil blanket is for adopting joint strip cover to establish on the output shaft to be located between end cover and the box, in order to play sealed effect, but this mode, joint strip life is low, and the oil leak phenomenon can appear after the joint strip wearing and tearing after the gear box long-time operation, leads to the gear box life to be low, and because joint strip installs in the end cover, need wholly demolish the end cover when carrying out maintenance operation, maintenance operation difficulty.

In summary, how to solve the problems of difficult mechanical processing, short service life, difficult maintenance operation and the like of the output shaft seal of the wind power semi-direct drive gearbox is a problem to be solved by the present technicians in the field.

Disclosure of utility model

Therefore, the utility model aims to provide the wind power semi-direct-drive gear box output shaft sealing structure which is high in universality and convenient to assemble and disassemble, the sealing structure can improve the sealing performance of the gear box output shaft, the maintenance operation of the gear box output shaft sealing is convenient, and the maintenance cost is saved.

The utility model further aims to provide a wind power semi-direct drive gearbox.

In order to achieve the above object, the present utility model provides the following technical solutions:

An output shaft sealing structure of a wind power semi-direct drive gear box, comprising:

an end cover, the inner side of which is used for connecting with the box body,

The gear box output shaft passes through the inner cavity of the end cover and extends out of the end cover, and the periphery of the gear box output shaft is in clearance fit with the inner cavity of the end cover;

The sealing assembly comprises a plurality of sealing gaskets, a plurality of supporting gaskets and fasteners, wherein the sealing gaskets and the supporting gaskets are distributed in a staggered mode along the axial direction of the gear box output shaft, the sealing gaskets are sleeved on the gear box output shaft in an interference fit mode, so that split type sealing members are formed, and the split type sealing members can be detachably arranged on the outer sides of the end covers through the fasteners.

Preferably, the outermost layer of the split sealing member far away from the end cover is the supporting pad, the fastener comprises a pressing plate and a first connecting piece, the pressing plate is pressed on the outermost layer of the supporting pad, and the first connecting piece sequentially penetrates through the pressing plate and the split sealing member to be connected with the end cover.

Preferably, the first connector is a bolt member.

Preferably, the outermost layer of the split seal member has a thickness greater than the rest of the layers.

Preferably, the fastener inner diameter in the split seal member is greater than the gasket inner diameter.

Preferably, the sealing gasket is a bronze sealing gasket, and the supporting gasket is a stainless steel sealing gasket.

Preferably, the end cover comprises a large end cover and a small end cover, one side of the large end cover is used for being connected with the box body, the other side of the large end cover is detachably connected with one side of the small end cover, the other side of the small end cover is detachably connected with the split sealing member, and the small end cover is in clearance fit with the output shaft of the gearbox.

Preferably, the first oil slinger and the second oil slinger are sleeved on the output shaft of the gear box, and are axially positioned through the large end cover and the small end cover respectively.

The wind power semi-direct-drive gearbox comprises the output shaft sealing structure of the wind power semi-direct-drive gearbox.

Compared with the background art, the sealing structure for the output shaft of the wind power semi-direct-drive gear box has the advantages that the inner side of the end cover is connected with the box body, the output shaft of the gear box penetrates through the inner cavity of the end cover to extend out of the end cover, the sealing assembly is detachably arranged on the outer side of the end cover, and the sealing assembly is integrally sleeved on the output shaft of the gear box to seal the output shaft of the gear box, so that lubricating oil leakage caused by air flow entering the inside of the gear box is prevented. The sealing assembly consists of a plurality of sealing gaskets, a plurality of supporting gaskets and fastening pieces, the sealing gaskets and the supporting gaskets are stacked in a staggered mode along the axial direction of the gear box output shaft, the sealing gaskets are sleeved on the gear box output shaft and are in interference fit with the gear box output shaft to form split type sealing members, the sealing gaskets in the split type sealing members are thinner than the supporting gaskets, the supporting gaskets can play a supporting role, so that the split type sealing members have good structural strength, and the split type sealing members are detachably connected with the outer sides of the end covers through the fastening pieces.

Therefore, when the split type sealing member seals the gear box output shaft, the split number can be adjusted according to the sizes of different gear box output shafts, namely the number of sealing gaskets is adjusted, the universality is high, each sealing gasket is in interference fit with the gear box output shaft, the sealing gasket is worn at a low speed until just fitting with the periphery of the gear box output shaft at the initial stage of the operation of the gear box, and afterwards, the sealing gasket is not worn any more, so that the wear of the sealing gasket is reduced, the sealing performance of the gear box output shaft is improved, the internal parts of the gear box are protected from being damaged, and the service life of the gear box is prolonged; in addition, in the maintenance operation process of the output shaft seal of the gear box, as the split type sealing member is detachably arranged on the outer side of the end cover, the end cover is not required to be detached for maintenance, and only the fastener is required to be detached or loosened, so that the integral split type sealing member or any split type sealing gasket in the split type sealing member can be replaced, the split type sealing member can be conveniently detached, the maintenance operation of the output shaft seal of the gear box is convenient, and the maintenance cost is saved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of an output shaft sealing structure of a wind power semi-direct drive gearbox provided by the utility model;

FIG. 2 is a schematic view of a split seal member according to the present utility model;

Fig. 3 is a cross-sectional view at fig. 2 A-A.

In the figure:

The oil slinger comprises an end cover 1, a gear box output shaft 2, a sealing assembly 3, a first oil slinger 4 and a second oil slinger 5;

11 is a large end cover, 12 is a small end cover, and 13 is a second connecting piece;

31 is a gasket, 32 is a support pad, 33 is a pressure plate, 34 is a first connector.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model has the core of providing a wind power semi-direct drive gear box output shaft sealing structure with high universality and convenient disassembly and assembly, which can improve the tightness of the gear box output shaft, is convenient for the maintenance operation of the gear box output shaft sealing and saves the maintenance cost.

The utility model further provides a wind power semi-direct drive gearbox.

Referring to fig. 1 to 3, the application provides a sealing structure of an output shaft of a wind power semi-direct drive gearbox, which comprises an end cover 1, a gearbox output shaft 2 and a sealing assembly 3. The inner side of the end cover 1 is used for connecting a box body, the gear box output shaft 2 passes through the inner cavity of the end cover 1 and extends out of the end cover 1, and the periphery of the gear box output shaft 2 is in clearance fit with the inner cavity of the end cover 1; the sealing assembly 3 comprises a plurality of sealing gaskets 31, a plurality of supporting gaskets 32 and fasteners, the plurality of sealing gaskets 31 and the plurality of supporting gaskets 32 are distributed in a staggered mode along the axial direction of the gear box output shaft 2, and the sealing gaskets 31 are sleeved on the gear box output shaft 2 in an interference fit mode to form split type sealing members, and the split type sealing members are detachably arranged on the outer side of the end cover 1 through the fasteners.

It should be noted that, the inside of end cover 1 is connected with the box, and gear box output shaft 2 rotatably sets up in the inner chamber of end cover 1 through the bearing, and the part of gear box output shaft 2 stretches out in the outside of end cover 1, and seal assembly 3 can dismantle the setting in the outside of end cover 1, and its whole cover is established on gear box output shaft 2 to seal gear box output shaft 2, prevent that the air current from getting into the gear box inside and causing lubricating oil to reveal. The seal assembly 3 specifically comprises a plurality of seal gaskets 31, a plurality of support gaskets 32 and fasteners, the plurality of seal gaskets 31 and the plurality of support gaskets 32 are stacked in a staggered manner along the axial direction of the gear box output shaft 2, the seal gaskets 31 are sleeved on the gear box output shaft 2 and are in interference fit with the gear box output shaft 2 to form split type seal members, the seal gaskets 31 in the split type seal members are thinner than the support gaskets 32, the support gaskets 32 can play a supporting role, so that the split type seal members have better structural strength, and the split type seal members are detachably connected with the outer sides of the end covers 1 through the fasteners.

Therefore, when the split type sealing member seals the gear box output shaft 2, the split number can be adjusted according to the sizes of different gear box output shafts 2, namely the number of the sealing gaskets 31 is adjusted, the universality is high, each sealing gasket 31 is in interference fit with the gear box output shaft 2, the sealing gasket 31 is worn at a low speed until just fitting with the periphery of the gear box output shaft 2 in the initial stage of gear box operation, and afterwards, the sealing gasket 31 is not worn any more, so that the wear amount of the sealing gasket 31 is reduced, the sealing performance of the gear box output shaft 2 is improved, the internal parts of the gear box are protected from being damaged, and the service life of the gear box is prolonged; in addition, in the maintenance operation process of the sealing of the gearbox output shaft 2, as the split type sealing member is detachably arranged on the outer side of the end cover 1, the end cover 1 is not required to be detached for maintenance, and only the fastener is required to be detached or loosened, the integral split type sealing member or any split type sealing gasket 31 in the split type sealing member can be replaced, so that the split type sealing member can be conveniently detached, the maintenance operation of the sealing of the gearbox output shaft 2 is convenient, and the maintenance cost is saved.

On the basis of the above embodiment, please refer to fig. 1, the outermost layer of the split sealing member far away from the end cover 1 is a supporting pad 32, the fastener includes a pressing plate 33 and a first connecting piece 34, the pressing plate 33 is pressed on the outermost supporting pad 32, and the first connecting piece 34 sequentially penetrates through the pressing plate 33 and the split sealing member to be connected with the end cover 1.

Specifically, the fastener is composed of a pressing plate 33 and a first connecting piece 34, the outermost layer of the split sealing member is a supporting pad 32, during the process of installing the split sealing member, the innermost layer of the split sealing member is propped against the outer layer of the end cover 1, and the pressing plate 33 is tightly pressed on the supporting pad 32 of the outermost layer of the split sealing member, so that the sealing pad 31 is prevented from being damaged due to the fact that the pressing plate 33 is directly tightly pressed on the sealing pad 31, and the service life of the sealing pad 31 is prolonged; the split seal member is then removably secured to the outside of the end cap 1 by the first connector 34 so that the split seal member is securely mounted to the end cap 1.

On the basis of the above embodiment, please refer to fig. 1, the first connecting member 34 is a bolt member. It can be appreciated that the bolt has the advantages of strong detachability and high load capacity, the first connecting piece 34 adopts the bolt, correspondingly, the first threaded hole is formed in the pressing plate 33, the plurality of sealing gaskets 31 and the plurality of supporting gaskets 32 in the split sealing member are all provided with through holes, so that the two are stacked alternately to form the accommodating cavity through which the bolt can pass, the second threaded hole is formed in the outer side of the end cover 1 and at the position close to the gear box output shaft 2, the height of the second threaded hole from the gear box output shaft 2 is required to be set according to the height of the pressing plate 33, and thus, the split sealing member can be connected with the end cover 1 by sequentially penetrating the first threaded hole, the accommodating cavity and the second threaded hole, and the convenience of disassembly of the split sealing member and the stability of connection between the split sealing member and the end cover 1 are further improved.

The outermost support pad 32 is in direct contact with the pressing plate 33, and receives a large pressing force, and if the thickness of the outermost support pad 32 is small, the split type sealing member is easily deformed by pressing. Therefore, on the basis of the above embodiment, the thickness of the outermost support pad 32 in the split type sealing member is larger than that of the rest of the support pads 32, and the compressive strength of the outermost support pad 32 can be enhanced to avoid the compression deformation of the split type sealing member.

Only the gasket 31 of the split type sealing member is in contact with the gear case output shaft 2, and the support gasket 32 only plays a role of supporting the gasket 31. Therefore, on the basis of the above embodiment, please refer to fig. 3, the inner diameter of the fastener in the split sealing member is larger than the inner diameter of the gasket 31, so as to simplify the split sealing member, facilitate the processing, and reduce the weight of the split sealing member.

In order to ensure good sealability and structural strength of the split sealing member, the gasket 31 is preferably a bronze gasket 31 which is easy to process, resistant to friction and resistant to high temperature and high pressure, and the support gasket 32 is preferably a stainless steel gasket 31 which is resistant to corrosion and has high bearing capacity.

Further, referring to fig. 1, the end cap 1 adopts a split structure, and is split into a large end cap 11 and a small end cap 12, so that the large end cap 11 and the small end cap 12 are convenient to process and disassemble when applied to a large-volume gear box, one side of the large end cap 11 is connected with a box body, the other side of the large end cap is connected with one side of the small end cap 12 through a second connecting piece 13, the other side of the small end cap 12 is detachably connected with a split sealing member, and the small end cap 12 is in clearance fit with the gear box output shaft 2, so that the large end cap 11 and the small end cap 12 play a role in sealing the gear box, and external impurities are prevented from entering the gear box. It should be noted that, the second connecting piece 13 is a bolt, so as to facilitate the disassembly and assembly of the large end cover 11 and the small end cover 12.

On the basis of the above embodiment, please refer to fig. 1, a first oil slinger 4 and a second oil slinger 5 are sleeved on the gear box output shaft 2, and are axially positioned through a large end cover 11 and a small end cover 12 respectively. Specifically, the first oil slinger 4 is sleeved on the gear box output shaft 2, the outer periphery of the first oil slinger 4 is provided with an outer edge bulge, the outer edge bulge is in limiting clamping connection with the inner side wall of the large end cover 11 so as to limit the first oil slinger 4 to move along the gear box output shaft 2, namely, the axial positioning of the first oil slinger 4 is realized, and similarly, the second oil slinger 5 is in limiting clamping connection with the inner side wall of the small end cover 12 through the outer edge bulge so as to realize the axial positioning of the second oil slinger 5, so that the first oil slinger 4 and the second oil slinger 5 can prevent external impurities from entering during the operation of the gear box output shaft 2, and meanwhile, unnecessary lubricating oil is thrown away, and the normal lubrication state of the output shaft is ensured.

In addition to the above-mentioned wind power half direct-drive gear box output shaft sealing structure, the application also provides a wind power half direct-drive gear box comprising the wind power half direct-drive gear box output shaft sealing structure disclosed in the above-mentioned embodiment, and the structure of other parts of the wind power half direct-drive gear box is referred to the prior art, and will not be described herein.

It should be noted that in this specification relational terms such as first and second are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The wind power semi-direct drive gear box and the output shaft sealing structure thereof provided by the utility model are described in detail. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims (9)

1. The utility model provides a wind-powered electricity generation half directly drives gear box output shaft seal structure which characterized in that includes:

an end cover (1) whose inner side is used for connecting with the box body,

A gear box output shaft (2) penetrates through the inner cavity of the end cover (1) and extends out of the end cover (1), and the periphery of the gear box output shaft (2) is in clearance fit with the inner cavity of the end cover (1);

The sealing assembly (3) comprises a plurality of sealing gaskets (31), a plurality of supporting gaskets (32) and fasteners, wherein the sealing gaskets (31) and the supporting gaskets (32) are distributed in a staggered mode along the axial direction of the gear box output shaft (2), the sealing gaskets (31) are sleeved on the gear box output shaft (2) in an interference fit mode to form split type sealing members, and the split type sealing members are detachably arranged on the outer side of the end cover (1) through the fasteners.

2. Wind power semi-direct drive gearbox output shaft sealing structure according to claim 1, characterized in that the outermost layer of the split sealing member away from the end cover (1) is the support pad (32), the fastener comprises a pressing plate (33) and a first connecting piece (34), the pressing plate (33) is pressed on the support pad (32) at the outermost layer, and the first connecting piece (34) sequentially penetrates through the pressing plate (33) and the split sealing member to be connected with the end cover (1).

3. The wind power semi-direct drive gearbox output shaft sealing structure according to claim 2, wherein the first connector (34) is a bolt member.

4. The wind power semi-direct drive gearbox output shaft sealing structure according to claim 2, wherein the thickness of the outermost layer of the split sealing member is larger than the thickness of the rest layers of the supporting pads (32).

5. A wind power semi-direct drive gearbox output shaft sealing structure according to claim 1, characterized in that the fastener inside diameter in the split sealing member is larger than the inside diameter of the sealing gasket (31).

6. The wind power semi-direct drive gearbox output shaft sealing structure according to claim 1, wherein the sealing gasket (31) is a bronze sealing gasket (31), and the supporting gasket (32) is a stainless steel sealing gasket (31).

7. A wind power semi-direct drive gearbox output shaft sealing structure according to any one of claims 1 to 6, wherein the end cover (1) comprises a large end cover (11) and a small end cover (12), one side of the large end cover (11) is used for being connected with the box body, the other side of the large end cover (11) is detachably connected with one side of the small end cover (12), the other side of the small end cover (12) is detachably connected with the split sealing member, and the small end cover (12) is in clearance fit with the gearbox output shaft (2).

8. The wind power semi-direct drive gearbox output shaft sealing structure according to claim 7, wherein a first oil slinger (4) and a second oil slinger (5) are sleeved on the gearbox output shaft (2), and are axially positioned through the large end cover (11) and the small end cover (12) respectively.

9. A wind power semi-direct drive gearbox, characterized by comprising the wind power semi-direct drive gearbox output shaft sealing structure according to any one of the preceding claims 1 to 8.