CN216618266U - Multi-row roller turntable bearing for wind driven generator - Google Patents
Multi-row roller turntable bearing for wind driven generator Download PDFInfo
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- CN216618266U CN216618266U CN202220021312.0U CN202220021312U CN216618266U CN 216618266 U CN216618266 U CN 216618266U CN 202220021312 U CN202220021312 U CN 202220021312U CN 216618266 U CN216618266 U CN 216618266U
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Abstract
The utility model provides a multi-row roller turntable bearing for a wind driven generator, which comprises: an outer ring configured to be located at a radially outer end of the bearing; an inner race configured to be located at a radially inner end of the bearing; a single row of radial cylindrical rollers configured to bear a radial load between the outer race and the inner race; and double-row axial cylindrical rollers configured to bear an axial load between the outer ring and the inner ring; wherein the thickness of the mounting face side is smaller than the thickness of the non-mounting face side, and the raceway of the single-row radial cylindrical roller is located on the non-mounting face side.
Description
Technical Field
The utility model relates to the technical field of new energy, in particular to a multi-row roller turntable bearing for a wind driven generator.
Background
The pitch bearing is one of the key components in a wind turbine that is used to change the pitch angle of the wind turbine blades to facilitate power generation. The variable-pitch bearing is usually installed in a high air space with dozens of meters or hundreds of meters, and the assembly, disassembly, operation and maintenance work is difficult, so that the operation and maintenance cost is high. However, the pitch bearing usually needs to bear larger radial load, axial load and overturning moment in the operation process, so that the focus of the industry is to ensure that the pitch bearing has higher reliability and lower structural damage under the condition of maintaining as less as possible so as to meet the service life of 20 years.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a multi-row roller turntable bearing for a wind driven generator, which aims to solve the problem that the existing bearing is low in fatigue resistance and endurance, so that the variable pitch bearing is ensured to have high reliability and low structural damage under the condition of maintaining as little as possible.
In order to solve the above technical problem, the present invention provides a multi-row roller slewing bearing for a wind turbine, comprising:
an outer ring disposed radially outward of the plurality of rows of roller slewing bearings;
an inner ring disposed radially inward of the plurality of rows of roller slewing bearings;
radial cylindrical rollers arranged between the outer ring and the inner ring in a radial direction such that they can bear a radial load of the outer ring and a radial load of the inner ring; and
axial cylindrical rollers arranged in the axial direction between the outer ring and the inner ring such that they can bear axial loads of the outer ring and the inner ring;
wherein the thickness of the mounting face side is smaller than the thickness of the non-mounting face side, and the raceway of the single-row radial cylindrical roller is located on the non-mounting face side.
The mounting surface side is a surface to which other components are connected, and the non-mounting surface side is a surface to which other components are not connected.
Optionally, in the multi-row roller slewing bearing for the wind turbine, the radial cylindrical rollers include a single row of radial cylindrical rollers, and the single row of radial cylindrical rollers are arranged in a gap between the outer ring and the inner ring, so that rolling surfaces of the radial cylindrical rollers contact the outer ring and the inner ring in a radial direction at the same time; and/or
The axial cylindrical rollers comprise two rows of axial cylindrical rollers which are respectively arranged in two gaps which are distributed in the axial direction between the outer ring and the inner ring, so that the rolling surfaces of the axial cylindrical rollers are in contact with the outer ring and the inner ring simultaneously in the axial direction.
Optionally, in the multi-row roller slewing bearing for the wind turbine, on the premise of ensuring that the overall thickness of the outer ring and/or the inner ring is not changed, the thickness of the mounting surface side is smaller than that of the non-mounting surface side, the raceway of the single-row radial cylindrical roller is located on the non-mounting surface side, and the radial play of the single-row radial cylindrical roller is a negative play.
Optionally, in the multi-row roller turntable bearing for the wind power generator, for the wind power generator with the variable pitch of the inner ring, the outer ring comprises a blade-side outer ring and a hub-side outer ring, the mounting surface side is the hub-side outer ring, the non-mounting surface side is the blade-side outer ring, the mounting surface of the outer ring is connected with the hub, and the mounting surface of the inner ring is connected with the fan blade;
for the wind driven generator with the variable-pitch outer ring, the inner ring comprises a blade side inner ring and a hub side inner ring, the mounting surface side is the hub side inner ring, the non-mounting surface side is the blade side inner ring, the mounting surface of the outer ring is connected with the fan blade, and the mounting surface of the inner ring is connected with the hub.
Optionally, in the multi-row roller turntable bearing for the wind driven generator, the shapes of the cross sections of the inner ring and the outer ring are matched to form a boss opposite to the groove, a single-row radial cylindrical roller is connected with the top end of the boss and the bottom of the groove, and double-row axial cylindrical rollers are respectively located on two sides of the top end of the boss and connected with the inner walls of two sides of the groove;
for the wind driven generator with the variable-pitch inner ring, the inner ring is a boss, and the blade side outer ring and the hub side outer ring are spliced into a groove
For the wind driven generator with the variable-pitch outer ring, the outer ring is a boss, and the inner ring at the blade side and the inner ring at the hub side are spliced into a groove.
Optionally, in the multi-row roller turntable bearing for the wind turbine, the inner ring is subjected to pitch variation, when a raceway of a single-row radial cylindrical roller is not dug inwards, a radial outward expansion clamping groove is formed in an outer ring on the side of a blade, one end of the single-row radial cylindrical roller is connected with the radial outward expansion clamping groove, and the other end of the single-row radial cylindrical roller is connected with the top end of a boss of the inner ring;
and when the roller path of the single-row radial cylindrical roller is internally dug, the top end of the boss of the inner ring is provided with an inner groove, and the single-row radial cylindrical roller is connected with the inner groove and the outer ring at the side of the blade.
Optionally, in the multi-row roller turntable bearing for the wind turbine, the outer ring is subjected to pitch variation, when a raceway of a single row of radial cylindrical rollers is not dug inwards, a radial inward-concave clamping groove is formed in the inner ring on the blade side, one end of the single row of radial cylindrical rollers is connected with the radial inward-concave clamping groove, and the other end of the single row of radial cylindrical rollers is connected with the top end of a boss of the outer ring;
and when the roller path of the single-row radial cylindrical roller is internally dug, the top end of the boss of the outer ring is provided with an inner groove, and the single-row radial cylindrical roller is connected with the inner groove and the inner ring at the side of the blade.
Optionally, in the multi-row roller slewing bearing for the wind turbine, the inner ring is pitched, and when the radial raceway is not internally excavated: the structure of the axial cylindrical roller bearing comprises an outer ring, an inner ring, a single-row radial cylindrical roller bearing radial load and a double-row axial cylindrical roller bearing axial load, wherein the outer ring consists of a blade-side outer ring and a hub-side outer ring;
the inner ring and the blade side outer ring form a blade side axial raceway, the inner ring and the hub side outer ring form a hub side axial raceway, the inner ring and the radial outward expansion clamping groove form a radial raceway, blade side axial rollers are arranged in the blade side raceway, hub side axial rollers are arranged in the hub side raceway, radial rollers are arranged in the radial raceway, and the thickness of the blade side outer ring is larger than that of the hub side outer ring.
Optionally, in the multi-row roller slewing bearing for the wind turbine, the inner ring is internally provided with a variable pitch, and when the radial raceway is internally excavated: the structure of the axial cylindrical roller bearing comprises an outer ring, an inner ring, a single-row radial cylindrical roller bearing radial load and a double-row axial cylindrical roller bearing axial load, wherein the outer ring consists of a blade-side outer ring and a hub-side outer ring;
the inner ring and the blade side outer ring form a blade side axial raceway, the inner ring and the hub side outer ring form a hub side axial raceway, an inner groove in the top end of the inner ring and the blade side outer ring form a radial raceway, a blade side axial roller is arranged in the blade side raceway, a hub side axial roller is arranged in the hub side raceway, a radial roller is arranged in the radial raceway, and the thickness of the blade side outer ring is larger than that of the hub side outer ring.
Optionally, in the multi-row roller slewing bearing for the wind turbine, when the radial raceway is not internally excavated, the outer ring is pitched: the structure of the axial cylindrical roller bearing comprises an outer ring, an inner ring, a single-row radial cylindrical roller bearing radial load and a double-row axial cylindrical roller bearing axial load, wherein the inner ring consists of a blade-side inner ring and a hub-side inner ring;
the outer ring and the blade side inner ring form a blade side axial raceway, the outer ring and the hub side inner ring form a hub side axial raceway, the outer ring and the radial inward-recessed clamping groove form a radial raceway, blade side axial rollers are arranged in the blade side raceway, hub side axial rollers are arranged in the hub side raceway, radial rollers are arranged in the radial raceway, and the thickness of the hub side inner ring is smaller than that of the blade side inner ring.
Optionally, in the multi-row roller turntable bearing for the wind turbine, when the radial raceway is internally excavated, the outer ring is pitched: the structure of the axial cylindrical roller bearing comprises an outer ring, an inner ring, a single-row radial cylindrical roller bearing radial load and a double-row axial cylindrical roller bearing axial load, wherein the inner ring consists of a blade-side inner ring and a hub-side inner ring;
the outer ring and the blade side inner ring form a blade side axial raceway, the outer ring and the hub side inner ring form a hub side axial raceway, an inner groove in the top end of the outer ring and the blade side inner ring form a radial raceway, blade side axial rollers are arranged in the blade side raceway, hub side axial rollers are arranged in the hub side raceway, radial rollers are arranged in the radial raceway, and the thickness of the hub side inner ring is smaller than that of the blade side inner ring.
The present invention is based on the following insight of the inventors: the inventor discovers that for the inner ring variable pitch bearing, the structure of the prior multi-row cylindrical roller bearing generally has the structural characteristics of small thickness of the outer ring at the blade side and large thickness of the outer ring at the hub side, and the radial roller path of the bearing is close to the hub side; for an outer ring variable pitch bearing, the structure of the prior multi-row cylindrical roller bearing generally has the structural characteristics of small thickness of an inner ring at a blade side and large thickness of an inner ring at a hub side, and a radial raceway of the bearing is close to the hub side; the structure easily causes the joint surface position of the blade side outer ring and the hub side outer ring to generate larger opening variation, further causes the fatigue damage of the ferrule and the connecting bolt to be larger, and causes the bearing to have lower fatigue resistance and endurance.
In view of the above limitations of the prior art, in the multi-row roller slewing bearing for the wind power pitch bearing provided by the utility model, the thickness of the mounting surface side is smaller than that of the non-mounting surface side, and the raceway of the single-row radial cylindrical roller is located on the non-mounting surface side, so that a structure that the thickness of the mounting surface side is larger than that of the non-mounting surface side adopted in the prior art is avoided, the defect that a joint surface position of a blade side outer ring and a hub side outer ring is prone to generating a large opening variation due to the structure is further avoided, the fatigue damage of a ring and a connecting bolt is reduced, and the fatigue resistance of the bearing is enhanced.
In the multi-row roller turntable bearing structure for the wind driven generator, the inner ring is subjected to variable pitch bearing in advance under the condition of ensuring that the integral thickness of the outer ring is not changed, so that the height of the outer ring at the blade side is greater than that of the outer ring at the hub side, the radial roller path is arranged at the outer ring at the blade side, and the radial roller path is in two structural forms of inner digging and non-inner digging; the outer ring of the variable-pitch bearing is provided with a radial raceway, the height of the inner ring at the blade side is larger than that of the inner ring at the hub side, the radial raceway is arranged at the inner ring at the blade side, the radial raceway is divided into two structural forms of inner digging and non-inner digging, the inner digging of the radial raceway can reduce the cost of the bearing to a certain extent, and the structures of the inner ring and the outer ring of the bearing are more compact; the radial raceway is not internally dug, so that the reliability of the radial raceway of the bearing can be improved to a certain extent. This structure not only possesses advantages such as traditional multirow post bearing capacity is strong under the operation load, has reduced the section faying face simultaneously and has opened the change volume, has reduced outer lane raceway root oil groove and connecting bolt's stress fluctuation, has also reduced the fatigue damage of lasso body and connecting bolt, and then has improved the antifatigue endurance of bearing. The fatigue life of the bearing is prolonged to a certain extent, the reliability of the bearing is improved, and the probability of the early failure of the bearing and the cost of the operation and maintenance of the bearing are reduced.
Drawings
FIG. 1 is a schematic view of a multi-row roller turntable bearing inner ring variable pitch non-concave for a wind driven generator according to an embodiment of the present invention;
FIG. 2 is a schematic view of inner rings of a multi-row roller turntable bearing for a wind turbine generator varying pitch and recessing according to an embodiment of the present invention;
FIG. 3 is a schematic view of a multi-row roller turntable bearing outer ring variable pitch non-concave for a wind driven generator according to an embodiment of the present invention;
FIG. 4 is a schematic view of the inner concave pitch of the outer ring of the multi-row roller turntable bearing for the wind driven generator according to the embodiment of the utility model;
shown in the figure: 1-an outer ring; 2-inner ring; 3-single row of radial cylindrical rollers; 4-radial raceway; 5-double-row axial cylindrical rollers; 6-axial raceway; 7-blade side outer ring; 8-hub side outer ring; 9-inner ring at hub side; 10-blade side inner ring; 11-radially outwardly expanding the clamping groove; 12-a radially inwardly recessed slot; 13-inner groove.
Detailed Description
The utility model provides a multi-row roller turntable bearing for a wind driven generator, which is further described in detail by combining the attached drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Furthermore, features from different embodiments of the utility model may be combined with each other, unless otherwise indicated. For example, a feature of the second embodiment may be substituted for a corresponding or functionally equivalent or similar feature of the first embodiment, and the resulting embodiments are likewise within the scope of the disclosure or recitation of the present application.
The utility model aims to provide a multi-row roller turntable bearing for a wind driven generator, which aims to solve the problem that the existing bearing is low in fatigue resistance and endurance.
In order to achieve the above object, the present invention provides a multi-row roller slewing bearing for a wind turbine, comprising: an outer ring configured to be located at a radially outer end of the bearing; an inner race configured to be located at a radially inner end of the bearing; a single row of radial cylindrical rollers configured to bear a radial load between the outer race and the inner race; and double-row axial cylindrical rollers configured to bear an axial load between the outer ring and the inner ring; wherein the thickness of the mounting face side is smaller than the thickness of the non-mounting face side, and the raceways of the single-row radial cylindrical rollers are located on the non-mounting face side.
The utility model provides a multi-row roller turntable bearing for a wind driven generator, which comprises the following components as shown in figures 1-4: an outer ring 1 configured to be located at one end of a radial outer side of the bearing; an inner ring 2 configured to be located at one end of a radial inner side of the bearing; a single row of radial cylindrical rollers 3 configured to bear a radial load between the outer ring and the inner ring; and double-row axial cylindrical rollers 5 configured to bear an axial load between the outer ring and the inner ring; wherein the thickness of the mounting face side is smaller than that of the non-mounting face side, and the raceway of the single-row radial cylindrical roller 3 is located on the non-mounting face side.
In an embodiment of the utility model, in the multi-row roller slewing bearing for the wind driven generator, on the premise of ensuring that the overall thickness of the outer ring 1 and/or the inner ring 2 is not changed, the thickness of the mounting surface side is smaller than that of the non-mounting surface side, the raceway of the single-row radial cylindrical roller 3 is positioned on the non-mounting surface side, and the radial play of the single-row radial cylindrical roller 3 is a negative play.
In one embodiment of the present invention, in the multi-row roller slewing bearing for a wind turbine, the mounting surface side is a surface to which another component is connected, and the non-mounting surface side is a surface to which another component is not connected. For the wind driven generator with the variable pitch of the inner ring, the outer ring 1 comprises a blade side outer ring 7 and a hub side outer ring 8, the mounting surface side is the hub side outer ring 8, and the non-mounting surface side is the blade side outer ring 7; for the wind driven generator with the variable-pitch outer ring, the inner ring 2 comprises a blade-side inner ring 10 and a hub-side inner ring 9, the mounting surface side is the hub-side inner ring 9, and the non-mounting surface side is the blade-side inner ring 10.
In one embodiment of the utility model, in the multi-row roller turntable bearing for the wind driven generator, the shapes of the cross sections of the inner ring 2 and the outer ring 1 are matched to form a boss and a groove which are opposite to each other, a single-row radial cylindrical roller 3 is connected with the top end of the boss and the bottom of the groove, and double-row axial cylindrical rollers 5 are respectively positioned at two sides of the top end of the boss and connected with the inner walls of two sides of the groove; for the wind driven generator with the variable pitch of the inner ring, the inner ring 2 is a boss, and the blade side outer ring 7 and the hub side outer ring 8 are spliced into a groove; for the wind driven generator with the variable-pitch outer ring, the outer ring 1 is a boss, and the blade side inner ring 10 and the hub side inner ring 9 are spliced into a groove.
In one embodiment of the utility model, in the multi-row roller turntable bearing for the wind driven generator, the inner ring is changed into the pitch, when the raceway of the single-row radial cylindrical roller 3 is not dug inwards, the outer ring 7 at the blade side is provided with a radial outward expansion clamping groove 11, one end of the single-row radial cylindrical roller 3 is connected with the radial outward expansion clamping groove 11, and the other end of the single-row radial cylindrical roller 3 is connected with the top end of the boss of the inner ring 2; and (3) changing the pitch of the inner ring, when the raceway of the single-row radial cylindrical roller 3 is internally dug, the top end of the boss of the inner ring 2 is provided with an inner groove 13, and the single-row radial cylindrical roller 3 is connected with the inner groove 13 and the blade side outer ring 7.
In one embodiment of the utility model, in the multi-row roller turntable bearing for the wind driven generator, the outer ring is subjected to variable pitch, when a raceway of a single row of radial cylindrical rollers 3 is not dug inwards, a radial inwards-sunken clamping groove 12 is formed in the inner ring 10 on the blade side, one end of the single row of radial cylindrical rollers 3 is connected with the radial inwards-sunken clamping groove 12, and the other end of the single row of radial cylindrical rollers 3 is connected with the top end of a boss of the outer ring 1; and when the roller path of the single-row radial cylindrical roller 3 is internally dug, the top end of the boss of the outer ring 1 is provided with an inner groove 13, and the single-row radial cylindrical roller 3 is connected with the inner groove 13 and the blade side inner ring 10.
As shown in fig. 1, in the multi-row roller slewing bearing for the wind turbine, when the radial raceway 4 is not internally excavated for changing the pitch of the inner ring 2: the structure of the axial cylindrical roller bearing comprises an outer ring 1, an inner ring 2, a single-row radial cylindrical roller 3 bearing a radial load and a double-row axial cylindrical roller 5 bearing an axial load, wherein the outer ring 1 consists of a blade-side outer ring 7 and a hub-side outer ring 8, and the double-row axial cylindrical roller 5 consists of a blade-side axial cylindrical roller and a hub-side axial cylindrical roller; the inner ring 2 and the blade side outer ring 7 form a blade side axial raceway 6, the inner ring 2 and the hub side outer ring 8 form a hub side axial raceway 6, the inner ring 2 and the radial outward expansion clamping groove 11 form a radial raceway 4, the blade side axial roller 5 is arranged in the blade side axial raceway 6, the hub side axial roller 5 is arranged in the hub side axial raceway 6, the radial roller 3 is arranged in the radial raceway 4, and the thickness of the blade side outer ring 7 is larger than that of the hub side outer ring 8.
As shown in fig. 2, in the multi-row roller slewing bearing for the wind turbine, when the radial raceway 4 is internally dug, the pitch of the inner ring 2 is changed: the structure of the axial cylindrical roller bearing comprises an outer ring 1, an inner ring 2, a single-row radial cylindrical roller 3 bearing a radial load and a double-row axial cylindrical roller 5 bearing an axial load, wherein the outer ring 1 consists of a blade side outer ring 7 and a hub side outer ring 8, and the double-row axial cylindrical roller 5 consists of a blade side axial cylindrical roller and a hub side axial cylindrical roller; the inner ring 2 and the blade side outer ring 7 form a blade side axial raceway 6, the inner ring 2 and the hub side outer ring 8 form a hub side axial raceway 6, an inner groove 13 in the top end of the inner ring 2 and the blade side outer ring 7 form a radial raceway 4, blade side axial rollers 5 are arranged in the blade side raceway 6, hub side axial rollers 5 are arranged in the hub side raceway 6, radial rollers 3 are arranged in the radial raceway 4, and the thickness of the blade side outer ring 7 is larger than that of the hub side outer ring 8.
As shown in fig. 3, in the multi-row roller slewing bearing for the wind turbine, when the radial raceway 4 is not internally dug, the outer ring 1 is subjected to pitch variation: the structure of the axial cylindrical roller bearing comprises an outer ring 1, an inner ring 2, a single-row radial cylindrical roller 3 bearing radial load and a double-row axial cylindrical roller 5 bearing axial load, wherein the inner ring 2 consists of a blade-side inner ring 10 and a hub-side inner ring 9, and the double-row axial cylindrical roller 5 consists of a blade-side axial cylindrical roller and a hub-side axial cylindrical roller; the outer ring 1 and the blade side inner ring 10 form a blade side axial raceway 6, the outer ring 1 and the hub side inner ring 9 form a hub side axial raceway 6, the outer ring 1 and the radial inward-recessed clamping groove 12 form a radial raceway 4, the blade side axial rollers 5 are arranged in the blade side raceway 6, the hub side axial rollers 5 are arranged in the hub side raceway 6, the radial rollers 3 are arranged in the radial raceway 4, and the thickness of the hub side inner ring 9 is smaller than that of the blade side inner ring 10.
As shown in fig. 4, in the multi-row roller slewing bearing for the wind turbine, when the radial raceway 4 is internally dug by changing the pitch of the outer ring 1: the structure of the axial cylindrical roller bearing comprises an outer ring 1, an inner ring 2, a single-row radial cylindrical roller 3 bearing radial load and a double-row axial cylindrical roller 5 bearing axial load, wherein the inner ring 2 consists of a blade-side inner ring 10 and a hub-side inner ring 9, and the double-row axial cylindrical roller 5 consists of a blade-side axial cylindrical roller and a hub-side axial cylindrical roller; the outer ring 1 and the blade side inner ring 10 form a blade side axial raceway 6, the outer ring 1 and the hub side inner ring 9 form a hub side axial raceway 6, an inner groove 13 in the top end of the outer ring 1 and the blade side inner ring 10 form a radial raceway 4, the blade side axial rollers 5 are arranged in the blade side raceway 6, the hub side axial rollers 5 are arranged in the hub side raceway 6, the radial rollers 3 are arranged in the radial raceway 4, and the thickness of the hub side inner ring 9 is smaller than that of the blade side inner ring 10.
In the multi-row roller turntable bearing for the wind driven generator, the thickness of the mounting surface side is smaller than that of the non-mounting surface side, and the raceway of the single-row radial cylindrical roller 3 is positioned on the non-mounting surface side, so that a structure that the thickness of the mounting surface side is larger than that of the non-mounting surface side in the prior art is avoided, the defect that the joint surface position of the blade side outer ring 7 and the hub side outer ring 8 is easy to generate large opening variation due to the structure is further avoided, the fatigue damage of a ferrule and a connecting bolt is reduced, and the fatigue resistance of the bearing is enhanced.
In the multi-row roller turntable bearing structure for the wind driven generator, under the condition of ensuring that the whole thickness of the outer ring 1 is not changed, the inner ring 2 is changed into a pitch bearing, so that the height of the outer ring 7 at the blade side is greater than that of the outer ring 8 at the hub side, the radial roller path 4 is arranged on the outer ring 7 at the blade side, and the radial roller path 4 is in two structural forms of inner digging and non-inner digging; the variable-pitch bearing of the outer ring 1 is characterized in that the height of an inner ring 10 on the blade side is larger than that of an inner ring 9 on the hub side, the radial roller path 4 is arranged on the inner ring 10 on the blade side, the radial roller path 4 is divided into two structural forms of inner digging and non-inner digging, the inner digging of the radial roller path 4 can reduce the bearing cost to a certain extent, and the structure of the inner ring 1 and the outer ring 1 of the bearing is more compact; the non-undercut of the radial raceways 4 may increase the reliability of the bearing radial raceways 4 to some extent. This structure not only possesses advantages such as traditional multirow post bearing capacity is strong under the operation load, has reduced the section faying face simultaneously and has opened the change volume, has reduced 1 raceway root oil groove in outer lane and connecting bolt's stress fluctuation, has also reduced the fatigue damage of lasso body and connecting bolt, and then has improved the antifatigue endurance capacity of bearing. The fatigue life of the bearing is prolonged to a certain extent, the reliability of the bearing is improved, and the probability of the early failure of the bearing and the cost of the operation and maintenance of the bearing are reduced.
The utility model discloses a wind power multi-row cylindrical roller variable pitch bearing, which comprises two structural forms: the inner ring and the outer ring are variable in pitch. The structure ensures that the height of the outer ring at the blade side is greater than that of the outer ring at the hub side in the case of ensuring that the overall thickness of the outer ring is not changed, and the radial roller path is arranged at the outer ring at the blade side; for the outer ring variable pitch bearing, the height of the inner ring at the blade side is larger than that of the inner ring at the hub side, and the radial roller path is arranged at the inner ring at the blade side; the radial raceway structures of the variable-pitch bearing with two structural forms of inner-ring variable pitch and outer-ring variable pitch are respectively divided into two structural forms of inner digging and non-inner digging. The utility model has the advantages that:
the method has the advantages that: the section joint surface of the structural bearing is subjected to opening variation under the operation load;
the method has the advantages that (2): the stress fluctuation and the fatigue damage of an oil groove at the root part of the outer ring raceway are reduced, and the anti-fatigue endurance is improved;
the method has the advantages that: stress fluctuation and fatigue damage of the connecting bolt are reduced, and anti-fatigue endurance is improved;
the advantages are that: the inner digging structure of the radial roller path can reduce the bearing cost to a certain extent, so that the inner and outer ring structures of the bearing are more compact;
the advantages are that: the radial raceway is not internally dug, so that the reliability of the radial raceway of the bearing can be improved to a certain extent.
In summary, the above embodiments have described in detail different configurations of the multi-row roller slewing bearing for the wind turbine, but it is understood that the present invention includes, but is not limited to, the configurations described in the above embodiments, and any modifications based on the configurations provided in the above embodiments are within the scope of the present invention. One skilled in the art can take the contents of the above embodiments to take a counter-measure.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (11)
1. A multi-row roller slewing bearing for a wind turbine, comprising:
an outer ring disposed radially outward of the plurality of rows of roller slewing bearings;
an inner ring disposed radially inward of the plurality of rows of roller slewing bearings;
radial cylindrical rollers arranged between the outer ring and the inner ring in a radial direction such that they can bear a radial load of the outer ring and a radial load of the inner ring; and
axial cylindrical rollers arranged in the axial direction between the outer ring and the inner ring such that they can bear axial loads of the outer ring and the inner ring;
wherein the thickness of the mounting face side is smaller than the thickness of the non-mounting face side, and the raceway of the single-row radial cylindrical roller is located on the non-mounting face side.
2. The multi-row roller slewing bearing of claim 1, wherein:
the radial cylindrical rollers include a single row of radial cylindrical rollers arranged in a gap between the outer ring and the inner ring such that rolling surfaces of the radial cylindrical rollers contact the outer ring and the inner ring simultaneously in a radial direction; and/or
The axial cylindrical rollers comprise two rows of axial cylindrical rollers which are respectively arranged in two gaps which are distributed in the axial direction between the outer ring and the inner ring, so that the rolling surfaces of the axial cylindrical rollers are in contact with the outer ring and the inner ring simultaneously in the axial direction.
3. The multi-row roller slewing bearing of claim 1, wherein the thickness of the mounting face side is smaller than the thickness of the non-mounting face side, and the raceways of the single-row radial cylindrical rollers are located on the non-mounting face side, the radial play of the single-row radial cylindrical rollers being a negative play.
4. The multi-row roller slewing bearing of claim 1, wherein for an inner ring pitch wind turbine, the outer ring comprises a blade-side outer ring and a hub-side outer ring, the mounting surface side is the hub-side outer ring, the non-mounting surface side is the blade-side outer ring, the outer ring mounting surface is connected to the hub, and the inner ring mounting surface is connected to the fan blades;
for the wind driven generator with the variable-pitch outer ring, the inner ring comprises a blade side inner ring and a hub side inner ring, the mounting surface side is the hub side inner ring, the non-mounting surface side is the blade side inner ring, the mounting surface of the outer ring is connected with the fan blade, and the mounting surface of the inner ring is connected with the hub.
5. The multi-row roller slewing bearing of claim 2, wherein the inner and outer rings have cross-sections shaped to mate to form a boss opposite to the groove, the single row radial cylindrical rollers connect the top of the boss to the bottom of the groove, and the double row axial cylindrical rollers are located on either side of the top of the boss and connect the inner walls of either side of the groove;
for the wind driven generator with the variable pitch inner ring, the inner ring is a boss, and the blade side outer ring and the hub side outer ring are spliced into a groove;
for the wind driven generator with the variable-pitch outer ring, the outer ring is a boss, and the inner ring at the blade side and the inner ring at the hub side are spliced into a groove.
6. The multi-row roller slewing bearing of claim 5, wherein the inner ring is variable-pitch, when the raceway of the single-row radial cylindrical roller is not internally dug, a radially outwardly expanded clamping groove is formed in the outer ring on the side of the blade, one end of the single-row radial cylindrical roller is connected with the radially outwardly expanded clamping groove, and the other end of the single-row radial cylindrical roller is connected with the top end of the boss of the inner ring;
and when the roller path of the single-row radial cylindrical roller is internally dug, the top end of the boss of the inner ring is provided with an inner groove, and the single-row radial cylindrical roller is connected with the inner groove and the outer ring at the side of the blade.
7. The multi-row roller slewing bearing of claim 5, wherein the outer ring is variable-pitch, when the raceway of the single-row radial cylindrical roller is not internally excavated, the inner ring on the blade side is provided with a radial inward-concave clamping groove, one end of the single-row radial cylindrical roller is connected with the radial inward-concave clamping groove, and the other end of the single-row radial cylindrical roller is connected with the top end of the boss of the outer ring;
and when the roller path of the single-row radial cylindrical roller is internally dug, the top end of the boss of the outer ring is provided with an inner groove, and the single-row radial cylindrical roller is connected with the inner groove and the inner ring at the side of the blade.
8. The multi-row roller slewing bearing of claim 2, wherein the inner ring is pitched when the radial raceway is not internally excavated: the structure of the axial cylindrical roller bearing comprises an outer ring, an inner ring, a single-row radial cylindrical roller bearing radial load and a double-row axial cylindrical roller bearing axial load, wherein the outer ring consists of a blade-side outer ring and a hub-side outer ring;
the inner ring and the outer ring on the blade side form a axial roller path on the blade side, the inner ring and the outer ring on the hub side form an axial roller path on the hub side, the inner ring and the radially outward-expanded clamping groove form a radial roller path, axial rollers on the blade side are arranged in the roller path on the blade side, axial rollers on the hub side are arranged in the roller path on the hub side, radial rollers are arranged in the radial roller path, and the thickness of the outer ring on the blade side is larger than that of the outer ring on the hub side.
9. The multi-row roller slewing bearing of claim 2, wherein the inner ring is pitched, when the radial raceways are inwardly dug: the structure of the axial cylindrical roller bearing comprises an outer ring, an inner ring, a single-row radial cylindrical roller bearing radial load and a double-row axial cylindrical roller bearing axial load, wherein the outer ring consists of a blade-side outer ring and a hub-side outer ring;
the inner ring and the blade side outer ring form a blade side axial raceway, the inner ring and the hub side outer ring form a hub side axial raceway, an inner groove in the top end of the inner ring and the blade side outer ring form a radial raceway, a blade side axial roller is arranged in the blade side raceway, a hub side axial roller is arranged in the hub side raceway, a radial roller is arranged in the radial raceway, and the thickness of the blade side outer ring is larger than that of the hub side outer ring.
10. The multi-row roller slewing bearing of claim 2, wherein, for outer ring pitching, when the radial raceways are not inwardly excavated: the structure of the axial cylindrical roller bearing comprises an outer ring, an inner ring, a single-row radial cylindrical roller bearing radial load and a double-row axial cylindrical roller bearing axial load, wherein the inner ring consists of a blade-side inner ring and a hub-side inner ring;
the outer ring and the blade side inner ring form a blade side axial raceway, the outer ring and the hub side inner ring form a hub side axial raceway, the outer ring and the radial inward-recessed clamping groove form a radial raceway, blade side axial rollers are arranged in the blade side raceway, hub side axial rollers are arranged in the hub side raceway, radial rollers are arranged in the radial raceway, and the thickness of the hub side inner ring is smaller than that of the blade side inner ring.
11. The multi-row roller slewing bearing of claim 2, wherein, for outer ring pitching, when the radial raceways are inwardly dug: the structure of the axial cylindrical roller bearing comprises an outer ring, an inner ring, a single-row radial cylindrical roller bearing radial load and a double-row axial cylindrical roller bearing axial load, wherein the inner ring consists of a blade-side inner ring and a hub-side inner ring;
the outer ring and the blade side inner ring form a blade side axial raceway, the outer ring and the hub side inner ring form a hub side axial raceway, an inner groove in the top end of the outer ring and the blade side inner ring form a radial raceway, blade side axial rollers are arranged in the blade side raceway, hub side axial rollers are arranged in the hub side raceway, radial rollers are arranged in the radial raceway, and the thickness of the hub side inner ring is smaller than that of the blade side inner ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220021312.0U CN216618266U (en) | 2022-01-05 | 2022-01-05 | Multi-row roller turntable bearing for wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220021312.0U CN216618266U (en) | 2022-01-05 | 2022-01-05 | Multi-row roller turntable bearing for wind driven generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216618266U true CN216618266U (en) | 2022-05-27 |
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ID=81686835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220021312.0U Active CN216618266U (en) | 2022-01-05 | 2022-01-05 | Multi-row roller turntable bearing for wind driven generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216618266U (en) |
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2022
- 2022-01-05 CN CN202220021312.0U patent/CN216618266U/en active Active
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