Sliding transmission structure of fan main shaft and bearing seat

Abstract

The sliding transmission structure comprises the main shaft and the bearing seat, the windward side end portion and the leeward side end portion of the bearing seat are connected with bearing end covers through bolts, the two ends of the main shaft are connected with a windward external connection ring plate and a leeward external connection ring plate respectively, and the inner side of the bearing seat is connected with a windward internal connection ring plate and a leeward internal connection ring plate. The inner side faces of the upwind internal connection annular plate and the downwind internal connection annular plate are coated with soft coating sliding layers, and the outer sides of the upwind external connection annular plate and the downwind external connection annular plate are coated with hard coating sliding layers. Gaps are connected between the main shaft and the inclined surface of the upper wind external connection ring plate, between the bearing seat and the inclined surface of the lower wind internal connection ring plate, and between the bearing seat and the inclined surface of the upper wind internal connection ring plate; through the relative integral design, the number of parts and the manufacturing and processing cost are reduced, and meanwhile, the structure is simple, and installation is convenient; and by arranging the gap-shaped elastic structure, stress concentration caused by load change is reduced, so that the stability and the reliability of the bearing are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the main shaft bearing technical field of wind driven generator, especially a kind of sliding transmission structure of fan main shaft and bearing seat. BACKGROUND

[0002] With the development of wind power industry, the cost (LCOE) of production per degree of electric caused by enterprise product competition is reduced year by year, which causes the market trend of large-scale wind driven generator. With the large-scale of wind driven generator, the size of many rolling main bearings applied to the position of wind driven generator main shaft is larger and larger, the weight is heavier and heavier, and the price is more and more expensive, so that the weight ratio and cost ratio of main bearing in large-scale wind turbine gradually increase, which is contrary to the original goal of reducing degree of electric cost by large-scale fan. In addition, the post-maintenance and replacement of damaged wind driven generator main bearing have always been a problem in the industry. Under this condition, using the sliding bearing with more compact structure and capable of being replaced in cabin as main bearing becomes a technical trend.

[0003] Under the technical trend of wind power main bearing "rolling to sliding", many wind driven generator manufacturers and bearing companies have invested a lot of efforts to research and develop sliding bearing suitable for wind driven generator main bearing. Compared with rolling bearing, sliding bearing needs more complex and reliable lubrication system due to its stronger dependence on lubricating oil, which will lead to additional cost increase. In addition, whether it is the previous rolling bearing scheme or the newly emerging sliding bearing scheme, the interference fit installation between the inner ring of bearing and main shaft, and the fretting wear caused by the relative motion between the outer ring of bearing and bearing seat are technical problems to be overcome.

[0004] Under this background, how to minimize the overall manufacturing cost of sliding system between main shaft and bearing seat, and how to reduce the vibration impact on main shaft and bearing seat during fan operation, are the keys to whether sliding system can occupy a place in future market. CONTENT OF UTILITY MODEL

[0005] In view of the deficiencies and shortcomings in the prior art, the purpose of the utility model is to provide a kind of sliding transmission structure of fan main shaft and bearing seat, solve the problem that the overall manufacturing cost of sliding system between main shaft and bearing seat in prior art is slightly high, and the vibration impact on main shaft and bearing seat is slightly high.

[0006] In order to solve the above technical problems, the utility model discloses the following technical scheme: a fan main shaft and bearing seat's sliding drive structure, including main shaft and bearing seat, the upper wind side and the lower wind side end of bearing seat are bolted with bearing end cover, bearing seat is at the outside of main shaft, the upper wind side outside of main shaft is fixedly connected with an inclined upper wind outer connecting ring plate, the lower wind side outside of main shaft is connected with the lower wind outer connecting ring plate, the upper wind side inboard of bearing seat is fixedly connected with an inclined upper wind inner connecting ring plate, the lower wind side inboard of bearing seat is fixedly connected with an inclined lower wind inner connecting ring plate, and the upper wind outer connecting ring plate and the upper wind inner connecting ring plate correspondingly contact, and the lower wind outer connecting ring plate and the lower wind inner connecting ring plate correspondingly contact, and the inboard of upper wind inner connecting ring plate and the inboard of lower wind inner connecting ring plate are all coated with soft coating sliding layer, and the outside of upper wind outer connecting ring plate and lower wind outer connecting ring plate is coated with hard coating sliding layer, and the inclined surface between main shaft and upper wind outer connecting ring plate, the inclined surface between bearing seat and lower wind inner connecting ring plate and the inclined surface between bearing seat and upper wind inner connecting ring plate all are equipped with gap.

[0007] As a further improvement of the utility model, the lower wind outer connecting ring plate inboard is attached to the main shaft, and a compression member is compressed between the lower wind outer connecting ring plate and the bearing end cover.

[0008] As a further improvement of the utility model, the compression member is a fixed ring or a bolt.

[0009] As a further improvement of the utility model, the hard coating sliding layer is titanium carbide or titanium nitride or di-aluminum oxide coating material.

[0010] As a further improvement of the utility model, the soft coating sliding layer is polytetrafluoroethylene or polyether ether ketone or molybdenum disulfide wear-resistant material.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. By setting the upper wind inner connecting ring plate and the lower wind inner connecting ring plate on the inboard of the bearing seat, setting the upper wind outer connecting ring plate and the lower wind outer connecting ring plate on the outside of the main shaft, and coating the inboard of the upper wind inner connecting ring plate and the inboard of the lower wind inner connecting ring plate with the hard coating sliding layer and coating the outside of the upper wind outer connecting ring plate and the lower wind outer connecting ring plate with the soft coating sliding layer, the upper wind inner connecting ring plate and the upper wind outer connecting ring plate and the lower wind inner connecting ring plate and the lower wind outer connecting ring plate on the main shaft and the bearing seat form the rotating surface, the soft coating sliding layer and the hard coating sliding layer are set on the rotating surface, thereby forming the simple sliding bearing structure, and the number of parts and the manufacturing and processing cost are reduced through the relative integral design, and the structure is simple and convenient to install.

[0013] 2. In addition, gaps are provided between the main shaft and the inclined surface of the upper-wind outer ring plate, between the bearing seat and the inclined surface of the lower-wind inner ring plate, and between the bearing seat and the inclined surface of the upper-wind inner ring plate. The provision of the gaps allows the upper-wind outer ring plate, the lower-wind inner ring plate, and the upper-wind inner ring plate to have a certain deformation space, thereby forming a structure similar to elasticity, which can absorb vibration and impact and reduce stress concentration caused by load changes, thereby improving the stability and reliability of the bearing and achieving effective radial and axial support of the bearing. The integrated design and structure can reduce the production and operation and maintenance costs of the sliding bearing to a certain extent and achieve the purpose of cost optimization of the sliding bearing transmission system.

[0014] 3. By providing the lower-wind outer ring plate on the outer side of the lower-wind side of the main shaft, the axial gap of the transmission system can be adjusted to a certain extent compared with the traditional direct locking and fixing method.

[0015] 4. By providing the hard-coated sliding layer with titanium carbide or titanium nitride or aluminum trioxide coating material, the hard-coated sliding layer has high hardness and good wear resistance.

[0016] 5. By providing the soft-coated sliding layer with titanium carbide or titanium nitride or aluminum trioxide coating material, the soft-coated sliding layer has good lubricating properties. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described below in combination with the drawings:

[0018] Figure 1 It is a structural schematic view of the utility model;

[0019] Figure 2 It is Figure 1 It is an enlarged view at A;

[0020] Figure 3 It is Figure 1 It is an enlarged view at B;

[0021] In the drawings: 1, main shaft; 2, bearing seat; 3, bearing end cover; 4, upper-wind outer ring plate; 5, lower-wind outer ring plate; 6, upper-wind inner ring plate; 7, lower-wind inner ring plate; 8, hard-coated sliding layer; 9, soft-coated sliding layer; 10, gap; 11, fixed ring. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings: Figures 1-3 The utility model will be further described below in combination with the drawings:

[0023] In order to facilitate description, the coordinate system is defined as shown in the drawings, and the left-right direction is transverse, the front-rear direction is longitudinal, and the up-down direction is vertical. Figure 1 In order to facilitate description, the coordinate system is defined as shown in the drawings, and the left-right direction is transverse, the front-rear direction is longitudinal, and the up-down direction is vertical.

[0024] The utility model discloses a kind of sliding transmission structure of fan main shaft and bearing seat, refer to Figure 1 、 Figure 2 And Figure 3 A kind of sliding transmission structure of fan main shaft and bearing seat, including main shaft 1 and bearing seat 2, the upper wind side and the lower wind side end of the bearing seat 2 are bolted with bearing end cover 3, the bearing seat 2 is at the outside of main shaft 1, the upper wind side outside of the main shaft 1 is fixedly connected with an inclined upper wind outer ring plate 4, that is, main shaft 1 is integrally made with upper wind outer ring plate 4, constitutes a whole, the lower wind side outside of the main shaft 1 is provided with lower wind outer ring plate 5, main shaft 1 is fixedly connected with lower wind outer ring plate 5, of course, preferably, main shaft 1 and lower wind outer ring plate 5 are relatively independent activity, specifically, the lower wind side of the inside of lower wind outer ring plate 5 is attached to main shaft 1, lower wind outer ring plate 5 is pressed on main shaft 1 by compression piece, compression piece is fixed ring 11 or bolt (not shown in drawing), compression piece is just able to be topped between bearing end cover 3 and lower wind outer ring plate 5, lower wind outer ring plate 5 is pushed, of course, compression piece can also adopt bolt, that is, bolt one end is screwed and is arranged on lower wind outer ring plate 5, the other end is topped on bearing end cover 3, bearing end cover 3 is pressed lower wind outer ring plate 5 by bolt, in addition, the length of bolt that projects lower wind outer ring plate 5 can be adjusted, so that it can be extruded on bearing end cover 3;Lower wind outer ring plate 5 is not directly locked on main shaft 1, and the axial clearance of transmission system can be adjusted to some extent.

[0025] The inside of the upper wind side of the bearing seat 2 is fixedly connected with an inclined upper wind inner ring plate 6, that is, bearing seat 2 is integrally made with upper wind inner ring plate 6, and the two constitute a whole, the lower wind side inside of the bearing seat 2 is fixedly connected with an inclined lower wind inner ring plate 7, bearing seat 2 is integrally made with lower wind inner ring plate 7, and the two constitute a whole, upper wind outer ring plate 4 and upper wind inner ring plate 6 correspondingly contact, lower wind outer ring plate 5 and lower wind inner ring plate 7 correspondingly contact, and the inside of the upper wind inner ring plate 6 and the inside of the lower wind inner ring plate 7 are both coated with soft coating sliding layer 9;The soft coating sliding layer 9 on bearing seat 2 can reach the performance requirement of the softer sliding layer in sliding friction pair by adding softer coating, the soft coating sliding layer 9 is polytetrafluoroethylene or polyether ether ketone or molybdenum disulfide wear-resistant material;With good lubricating property.

[0026] The outer side of the upper-wind outer connecting ring plate 4 and the lower-wind outer connecting ring plate 5 is coated with a hard-coated sliding layer 8, if the material of the main shaft 1 and the bearing seat 2 is alloy steel, the performance requirement of the sliding friction surface with better hardness and wear resistance can be achieved through surface heat treatment, if the material of the main shaft 1 and the bearing seat 2 is cast iron or cast steel, the performance requirement of the sliding friction surface with better hardness and wear resistance can be achieved through adding a hard coating on the sliding friction surface, the hard-coated sliding layer 8 can be titanium carbide or titanium nitride or aluminum oxide coating material with high hardness and good wear resistance.

[0027] The gap 10 is arranged between the inclined surface of the upper-wind outer connecting ring plate 4 and the main shaft 1, between the inclined surface of the lower-wind inner connecting ring plate 7 and the bearing seat 2, and between the inclined surface of the upper-wind inner connecting ring plate 6 and the bearing seat 2, and the gap 10 can be filled with elastic members, such as rubber elastic pads.

[0028] The upper-wind inner connecting ring plate 6 and the lower-wind inner connecting ring plate 7 are arranged on the inner side of the two ends of the bearing seat 2, the upper-wind outer connecting ring plate 4 and the lower-wind outer connecting ring plate 5 are arranged on the outer side of the main shaft 1, the inner side of the upper-wind inner connecting ring plate 6 and the inner side of the lower-wind inner connecting ring plate 7 are coated with the hard-coated sliding layer 8, and the outer side of the upper-wind outer connecting ring plate 4 and the lower-wind outer connecting ring plate 5 is coated with the soft-coated sliding layer 9, so that the upper-wind inner connecting ring plate 6 and the upper-wind outer connecting ring plate 4 and the lower-wind inner connecting ring plate 7 and the lower-wind outer connecting ring plate 5 form rotating surfaces on the main shaft 1 and the bearing seat 2, the soft-coated sliding layer 9 and the hard-coated sliding layer 8 are arranged on the rotating surfaces, and thus a simple sliding bearing structure is formed, the number of parts and the manufacturing and processing cost are reduced through the relative integral design, and the structure is simple and convenient to install.

[0029] The gap 10 is arranged between the inclined surface of the upper-wind outer connecting ring plate 4 and the main shaft 1, between the inclined surface of the lower-wind inner connecting ring plate 7 and the bearing seat 2, and between the inclined surface of the upper-wind inner connecting ring plate 6 and the bearing seat 2, and the gap 10 is arranged, so that the upper-wind outer connecting ring plate 4, the lower-wind inner connecting ring plate 7 and the upper-wind inner connecting ring plate 6 have a certain movement deformation allowance space, thereby forming a structure similar to elasticity, the structure can absorb vibration and impact and reduce stress concentration caused by load change, thereby improving the stability and reliability of the bearing, and the effective radial support and axial support of the bearing can be realized, and the integrated design and structure reduce the production and operation and maintenance cost of the sliding main bearing to a certain extent and achieve the purpose of cost optimization of the sliding bearing transmission system.

[0030] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication。For ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.It should be understood that the specific embodiments described herein are only for understanding the utility model and are not used to limit the utility model, all other embodiments obtained by ordinary skilled person in the art without making creative labor belong to the scope of protection of the utility model.

Claims

1. A sliding transmission structure for a fan main shaft and a bearing housing, comprising a main shaft and a bearing housing, wherein bearing end caps are bolted to both the upper and lower wind sides of the bearing housing, characterized in that: The bearing housing is located on the outside of the main shaft. The outer side of the windward side of the main shaft is fixedly connected to an inclined outer windward connecting ring plate, and the outer side of the leeward side of the main shaft is connected to a leeward connecting ring plate. The inner side of the windward side of the bearing housing is fixedly connected to an inclined inner windward connecting ring plate, and the inner side of the leeward side of the bearing housing is fixedly connected to an inclined inner leeward connecting ring plate. The outer windward connecting ring plate and the inner windward connecting ring plate are in corresponding contact, and the outer windward connecting ring plate and the inner leeward connecting ring plate are in corresponding contact. The inner surfaces of the inner windward connecting ring plate and the inner leeward connecting ring plate are coated with a soft coating, and the outer surfaces of the outer windward connecting ring plate and the leeward connecting ring plate are coated with a hard coating. Gaps are provided between the inclined surfaces of the main shaft and the outer windward connecting ring plate, between the bearing housing and the inner leeward connecting ring plate, and between the bearing housing and the inner windward connecting ring plate.

2. The sliding transmission structure of the fan main shaft and bearing housing according to claim 1, characterized in that: The inner side of the lower wind outer ring plate is fitted with the main shaft, and a clamping element is pressed between the lower wind outer ring plate and the bearing end cover.

3. The sliding transmission structure of the fan main shaft and bearing housing according to claim 2, characterized in that: The clamping component is a retaining ring or a bolt.

4. The sliding transmission structure of the fan main shaft and bearing housing according to claim 1, characterized in that: The hard-coated slip layer is a titanium carbide, titanium nitride, or aluminum oxide coating material.

5. The sliding transmission structure of the fan main shaft and bearing housing according to claim 1, characterized in that: The soft-coated slip layer is made of polytetrafluoroethylene, polyetheretherketone, or molybdenum disulfide wear-resistant material.

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