阅读说明：本技术 一种新型面轴瓦式齿轮箱减振器 (Novel face bearing bush type gear box shock absorber ) 是由 杨超 岳涛 苏泽涛 胡伟辉 林胜 刘文松 于 2021-01-04 设计创作，主要内容包括：本发明提出了一种新型面轴瓦式齿轮箱减振器,为半圆瓦片式结构,由外向内依次为外隔板、外层橡胶层、中隔板、内层橡胶层和内隔板；所述外层橡胶层与外隔板相接的长度小于外层橡胶层与中隔板相接的长度,所述内层橡胶层与中隔板相接的长度小于内层橡胶层与内隔板相接的长度,橡胶层与相邻两层隔板相接的长度具有长度差,且每个橡胶层的外侧长度小于内侧长度；所述橡胶层与相邻两层隔板相接的长度差沿着弧线从中间区域到45°区域再到两侧区域位置逐渐递减；所述外隔板、中隔板和内隔板的圆心在一条线上,但不在一个点上,具有偏心量。本发明新型面轴瓦式齿轮箱减振器主要应用于双馈式风力发电机的缓冲与减振,能明显延长减振器的使用寿命。(The invention provides a novel face bearing bush type gearbox shock absorber which is of a semicircular tile type structure and sequentially comprises an outer partition plate, an outer rubber layer, a middle partition plate, an inner rubber layer and an inner partition plate from outside to inside; the length of the outer rubber layer connected with the outer partition board is less than that of the outer rubber layer connected with the middle partition board, the length of the inner rubber layer connected with the middle partition board is less than that of the inner rubber layer connected with the inner partition board, the length of the rubber layer connected with the two adjacent partition boards has length difference, and the length of the outer side of each rubber layer is less than that of the inner side; the length difference of the rubber layer and the adjacent two layers of partition plates is gradually reduced from the middle area to the 45-degree area and then to the two side areas along the arc line; the centers of the outer partition plate, the middle partition plate and the inner partition plate are on the same line but not on the same point, and have eccentric amount. The novel surface bearing bush type gear box shock absorber is mainly applied to the buffering and shock absorption of a double-fed wind driven generator, and the service life of the shock absorber can be obviously prolonged.)

1. A novel face bearing bush type gear box shock absorber is characterized by being of a semicircular tile type structure and comprising three layers of partition plates and two layers of rubber layers, wherein an outer partition plate, an outer layer rubber layer, a middle partition plate, an inner layer rubber layer and an inner partition plate are sequentially arranged from outside to inside;

the length of the outer rubber layer connected with the outer partition board is less than that of the outer rubber layer connected with the middle partition board, the length of the inner rubber layer connected with the middle partition board is less than that of the inner rubber layer connected with the inner partition board, the length of the rubber layer connected with the two adjacent partition boards has length difference, and the length of the outer side of each rubber layer is less than that of the inner side;

the length difference of the rubber layer and the adjacent two layers of partition plates is gradually reduced from the middle area to the 45-degree area and then to the two side areas along the arc line;

the centers of the outer partition plate, the middle partition plate and the inner partition plate are on the same line but not on the same point, and have eccentric amount.

2. The new face bearing shoe gearbox damper according to claim 1, wherein said outer, middle and inner bulkheads are metal bulkheads.

3. The new face bearing shoe gearbox damper according to claim 2, wherein said metal spacer is adhesively secured to the rubber by a vulcanization process.

4. The novel face bearing shoe type gearbox shock absorber according to claim 1, wherein the part of the rubber layer connected with two adjacent partition plates is chamfered; the chamfer range of the part of the outer side of each rubber layer, which is connected with the partition plate, is R0.5-R5, and the chamfer range of the part of the inner side of each rubber layer, which is connected with the partition plate, is R0.5-R25.

5. The new face bearing shoe gearbox damper of claim 1 wherein said outer, middle and inner spacers are longer than the outer and inner rubbers.

6. The new face bearing shoe gearbox shock absorber according to claim 1, wherein said eccentricity has a value in the range of 0.1-30mm and said length difference has a value in the range of 0.1-50 mm.

7. The new face bearing shoe gearbox damper according to claim 1, wherein said number of rubber layers is 1-5.

8. The novel surface bearing shoe type gearbox vibration damper as claimed in any one of claims 1-7, wherein the rubber layer of the novel surface bearing shoe type gearbox vibration damper is elastically deformed during installation, the centers of the three layers of partition plates are concentrated to the same point along the center line, the end part of the outer layer of rubber is close to the outer partition plate along the gradient, and the end part of the inner layer of rubber is close to the middle partition plate along the gradient.

9. The novel surface bearing shoe type gearbox shock absorber according to claim 8, wherein after the novel surface bearing shoe type gearbox shock absorber is installed, the length difference of the two rubber layers and the two adjacent partition plates is similar from the middle area to the 45-degree area to the two side areas along an arc line, and the cross-sectional shape of each rubber layer is approximately consistent.

10. The new face bearing shoe gearbox damper according to claim 1, wherein said mid-zone cross-section, 45 ° zone cross-section, and side zone cross-section are straight, concave or convex in shape.

11. The new face bearing shoe type gearbox shock absorber according to claim 1, wherein said rubber layer has no holes or holes in the middle area and 45 ° area, the shape of the holes is a common round angle or has a slope characteristic, the slope characteristic is that the length of each rubber layer connected with two adjacent partition plates has a length difference, the length of the outer side of each rubber layer is smaller than that of the inner side, and the shape is a straight line, a concave or a convex shape.

12. The new face bearing shoe type gearbox shock absorber according to claim 1, wherein the profile shape of said side surface region is a normal round angle or has a slope characteristic, the slope characteristic is that the length of each rubber layer connected with two adjacent partition plates has a length difference, and the outer length of each rubber layer is less than the inner length, and the shape is a straight line, a concave or a convex shape.

Technical Field

The invention relates to the technical field of shock absorbers, in particular to a novel face bearing bush type gear box shock absorber.

Background

Wind energy is a clean and continuous energy, and compared with the traditional energy, the wind power generation does not depend on external energy; wind power generation gradually becomes an important component of the sustainable development strategy of many countries, and the development is rapid. With the development trend of large-scale and offshore wind power market, megawatt high-power wind generating sets will become the mainstream. Most of the fans are double-fed type and semi-direct-drive type units, and the stability of the fans is very important in the operation process.

With the continuous improvement of the matching infrastructure of the low wind speed wind field, the application of the low wind speed large-blade wind generating set is rapidly developed. Various manufacturers of large complete machines in China develop new machine types, and under the condition that the development of a unit is not completely mature, the unit is quickly installed in large quantities to operate, so that the fan encounters many problems in the operation process. Due to the insufficient research on the wind characteristics of a low wind speed area and the defects of a variable pitch system of a fan, the transmission system is often overloaded. The gearbox damper is weakest in the transmission system and generally is firstly damaged, so that the normal operation of the unit is influenced. In addition, in order to control the cost, under the condition of increasing the load, the size of the shock absorber is not increased, so that the requirements on the rigidity of the shock absorber are higher and higher, and the requirements on the reliability and the service life of the shock absorber are also higher and higher.

CN201510181336.7 of New Material science and technology Limited company in the Haizhou era, a vibration damper, the vibration damper can play the role of auxiliary damping through the elastomer, thus effectively improving the service life of the vibration damper. The shock absorber of the present invention comprises: the middle part of the vibration damping body is provided with a connecting hole and a deformation cavity for providing a deformation space for the vibration damping body; the shell is sleeved on the outer side of the vibration damping body; and an elastic body fixed in the deformation chamber and configured to be deformed by the compression of the damping body. The structure has the defects of smaller upper limit of rigidity and lower fatigue life under the working condition of large load.

CN 102782356A of ESM company, germany, describes an eccentric tensioning sleeve which, due to its particular eccentric geometry and the composite material used, consisting of elastomer and plate, is suitable for reducing vibrations and structural noise, which are particularly vertically effective, which can occur in machines or transmissions, particularly in wind power installations.

Patent 201510508828.2 of Jiangsu iron new materials GmbH discloses an elastic supporting component of a gearbox of a wind generating set. The novel upper seat comprises an upper seat body and a bottom plate, a frame structure is connected between the upper seat body and the bottom plate and is formed by four upright posts with rectangular cross sections, the upright posts are located at four corner positions of the upper seat body and the bottom plate, an upper elastic piece is arranged at the center of the bottom of the upper seat body, a lower elastic piece is arranged at the center of the upper portion of the bottom plate, an upper jacking block right facing the upper elastic piece is arranged above the upper seat body, and a lower jacking block right facing the lower elastic piece is arranged below the bottom plate. After adopting foretell structure, on the one hand, the structure of own of stand makes weight very light, has also avoided the material extravagant in the course of working, has practiced thrift the cost, and on the other hand, base and stand set up alone when reducing whole volume for the installation is convenient easily, has further reduced manufacturing cost, and in addition, the stopper that the upper portion of bottom plate set up when can guaranteeing mounted position makes the bottom plate very thin, has further alleviateed whole weight.

The gear box shock absorber with the three bearing bush structures has no description of rubber profile characteristics, the prepressing strain of the elastic body is very large when the shock absorber is installed, the dynamic strain of the elastic body is also very large under a fatigue working condition, so that the elastic body is easy to generate the phenomena of bulging, rubber cracking, peeling of the bonding surface of rubber and a metal partition plate and the like under a large load working condition, and the fatigue life of the shock absorber is difficult to meet the design life requirement of 20 years.

Disclosure of Invention

The invention aims to provide a novel surface bearing bush type gear box shock absorber which is mainly applied to buffering and shock absorption of a double-fed wind driven generator, can also be applied to a vibration isolation system of equipment such as rolling stocks, ships, engineering machinery and the like, and solves the technical problems of bulging and cracking of a rubber layer, short service life of the shock absorber and the like.

The technical scheme of the invention is realized as follows:

the invention provides a novel face bearing bush type gearbox shock absorber which is of a semicircular tile type structure and comprises three layers of partition plates and two layers of rubber layers, wherein the outer partition plate, the outer layer of rubber layer, a middle partition plate, the inner layer of rubber layer and the inner partition plate are sequentially arranged from outside to inside;

the length of the outer rubber layer connected with the outer partition board is less than that of the outer rubber layer connected with the middle partition board, the length of the inner rubber layer connected with the middle partition board is less than that of the inner rubber layer connected with the inner partition board, the length of the rubber layer connected with the two adjacent partition boards has length difference, and the length of the outer side of each rubber layer is less than that of the inner side;

the length difference of the rubber layer and the adjacent two layers of partition plates is gradually reduced from the middle area to the 45-degree area and then to the two side areas along the arc line;

the centers of the outer partition plate, the middle partition plate and the inner partition plate are on the same line but not on the same point, and have eccentric amount.

As a further improvement of the invention, the outer partition, the middle partition and the inner partition are metal partitions.

As a further improvement of the invention, the metal separator and the rubber are bonded and fixed through a vulcanization process.

As a further improvement of the invention, the part of the rubber layer, which is connected with two adjacent partition plates, is chamfered, the chamfer range of the part of the outer side of each rubber layer, which is connected with the partition plates, is R0.5-R5, and the chamfer range of the part of the inner side of each rubber layer, which is connected with the partition plates, is R0.5-R25.

As a further improvement of the invention, the lengths of the outer partition, the middle partition and the inner partition are longer than those of the outer layer rubber and the inner layer rubber.

As a further improvement of the invention, the value range of the eccentricity is 0.1-30mm, and the value range of the length difference is 0.1-50 mm.

As a further improvement of the invention, the number of the rubber layers is 1-5.

As a further improvement of the invention, when the novel surface bearing type gearbox shock absorber is installed, the rubber layer is elastically deformed, the centers of circles of the three layers of partition plates are concentrated on the same point along the central line, the end part of the outer layer rubber layer is close to the outer partition plate along the gradient, and the end part of the inner layer rubber layer is close to the middle partition plate along the gradient.

As a further improvement of the invention, after the novel surface bearing shoe type gearbox shock absorber is installed, the length difference of the connection of two rubber layers and two adjacent partition plates is similar from the middle area to the 45-degree area and then to the two side areas along an arc line, and the cross section of each rubber layer is approximately consistent.

As a further improvement of the invention, the rubber layer has holes, and the shapes of the holes at the middle region and the 45 ° region, and the profile shape of the side regions are linear, concave or convex.

The invention has the following beneficial effects: after the structure of the invention is installed, the bulging shapes of the end areas of each rubber layer at different positions along an arc line are close, namely the cross section shapes of each rubber layer are close to the same shape. Therefore, the stress uniformity of the rubber can be ensured, and the stress strain of the rubber at the position of the end part area is relatively uniform. When the fan is operated under a rated load, in the same section of the end area, the maximum strain position of each rubber layer is at the position where the rubber layer is connected with the outer side clapboard, as shown in figure 9, and after actual deformation, the position is wrapped in the rubber layer. When the rubber is subjected to rated load and dynamic fatigue load, the strain amplitude of the position is small because the rubber at the position has no deformation space. Therefore, the rubber in the end area is not easy to bulge and crack, the adhesive surface of the rubber and the metal partition plate is peeled off, and the service life of the whole rubber is greatly prolonged. When the fan runs and overloads, the rubber of the end part area is extruded, and the extrusion deformation of the middle area, the 45-degree area and the two side areas is consistent and does not exceed the end face of the partition plate, so that collision or friction with other external parts is avoided, and the risk of damaging the rubber layer is reduced. Meanwhile, when the rubber is overloaded, the rubber in the end area is not easy to crack under overload, the adhesive surface of the rubber and the metal partition plate is peeled off, and the like, so that the reliability of the rubber is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a novel face bearing shoe type gearbox damper of the present invention prior to installation;

FIG. 2 is a schematic side view of the novel face bearing shoe type gearbox damper of the present invention before installation;

FIG. 3 is a schematic diagram showing the division of the damper for the novel surface bearing bush type gear box of the present invention;

FIG. 4 is a schematic cross-sectional view of the structure of each part of the novel surface bearing block type gearbox damper before being installed;

FIG. 5 is a schematic structural view of the novel face bearing shoe type gearbox damper of the present invention in an installed condition;

FIG. 6 is a schematic view of the structural cross section of each part of the novel surface bearing shoe type gearbox damper in the installation state;

FIG. 7 is a schematic view of a structural cross section of each part of the novel surface bearing shoe type gearbox shock absorber under rated load;

FIG. 8 is a schematic view of the structural cross section of each part of the novel surface bearing bush type gear box shock absorber under the conditions of rated load and dynamic fatigue load;

FIG. 9 is a schematic view of the structural cross section of each part of the novel surface bearing shoe type gearbox damper under overload;

FIG. 10 is a schematic cross-sectional view of the end region of the novel face bearing shoe gearbox damper end region of the present invention in a different condition;

FIG. 11 is a schematic view of the structural cross-section of each part of the concave bearing shoe type gearbox damper according to the present invention;

FIG. 12 is a schematic view showing the structural cross-section of each part of the convex bearing shoe type gearbox damper according to the present invention;

FIG. 13 is a schematic structural view of a novel surface bearing shoe type gearbox damper with a common fillet hole in the middle according to the present invention;

FIG. 14 is a schematic structural view of a novel surface bearing shoe type gearbox damper with a linear hole in the middle according to the present invention;

FIG. 15 is a schematic structural view of a novel surface bearing shoe type gearbox damper with an outwardly convex hole in the middle according to the present invention;

FIG. 16 is a schematic structural view of a novel surface bearing shoe type gearbox damper with an inner concave hole in the middle according to the present invention;

wherein, 1, an outer clapboard; 12. an outer rubber layer; 2. a middle partition plate; 23. an inner rubber layer; 3. an inner partition plate; 4. a middle region; 41. a middle region cross section; a 5.45 ° region; 51.45 ° zone cross section; 6. a side region; 61. a side region cross-section; 7. eccentricity amount; 71. a centerline; 8. an end region.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1-4 are schematic structural diagrams of an example of the damper of the present invention relating to a novel face bearing type gearbox. The first embodiment of the invention is composed of an outer partition board 1, a middle partition board 2, an inner partition board 3, an outer layer rubber 12 and an inner layer rubber 23, and all the components are bonded together through a vulcanization process. The circle centers of the outer partition plate 1, the middle partition plate 2 and the inner partition plate 3 are not at one point, are on a line, and have a certain eccentric amount 7, and the value range of the eccentric amount is 0.1-30 mm. The section of the damper in the middle area 4,45 degree area 5, two side areas 6, the end surface profile of the inner layer rubber 23 and the outer layer rubber 12 has certain angle slope characteristic, namely the length of the outer layer rubber 12 connected with the outer clapboard 1 is less than the length of the outer layer rubber 12 connected with the middle clapboard 2, the length of the inner layer rubber 23 connected with the middle clapboard 2 is less than the length of the inner layer rubber 23 connected with the inner clapboard 3, the length of each rubber layer connected with the two adjacent clapboards has length difference, the value range of the length difference is 0.1-50mm, and the outer length of each rubber layer is less than the inner length.

The gradient characteristic is designed into a gradual change structure, namely the inner side length of each rubber layer is equal, the outer side length gradually increases from the middle area to the 45-degree area to the two side areas along an arc line, and the length difference of each rubber layer connected with the two adjacent layers of partition plates gradually decreases from the middle area to the 45-degree area to the two side areas along the arc line.

The chamfer angle is arranged at the joint of each rubber layer and two adjacent partition plates, the chamfer angle range of the joint of the outer side of each rubber layer and the partition plate is R0.5-R5, and the chamfer angle range of the joint of the inner side of each rubber layer and the partition plate is R0.5-R25.

The invention relates to a sectional schematic diagram of an example structure of a shock absorber in a mounting state, as shown in figures 5 and 6. After the structure is installed, the centers of the outer partition board 1, the middle partition board 2 and the inner partition board 3 are converged to a point along the central line 71. The value of the eccentricity amount 7 becomes 0. The outer layer rubber 12 and the inner layer rubber 23 are deformed by compression. The vibrator deformed by extrusion has the cross-sectional shapes of the outer layer rubber 12 and the inner layer rubber 23 in the middle area 4, the 45-degree area 5 and the two side areas 6.

Fig. 7 is a schematic cross-sectional view of an example structure of a shock absorber according to the present invention at rated load. The outer layer rubber 12 and the inner layer rubber 23 continue to be deformed by compression. The cross-sectional shapes of the outer layer rubber 12 and the inner layer rubber 23 of the middle area 4, the 45-degree area 5 and the two side areas 6 of the shock absorber subjected to the extrusion deformation are approximately consistent.

Fig. 8 is a schematic cross-sectional view of an example structure of a shock absorber according to the present invention under a rated load plus a dynamic fatigue load. The outer layer rubber 12 and the inner layer rubber 23 continue to be deformed by compression. The cross-sectional shapes of the outer layer rubber 12 and the inner layer rubber 23 of the middle area 4, the 45-degree area 5 and the two side areas 6 of the shock absorber subjected to the extrusion deformation are approximately consistent.

Fig. 9 is a schematic view showing an example of a shock absorber according to the present invention under overload. The outer layer rubber 12 and the inner layer rubber 23 continue to be deformed by compression. The cross-sectional shapes of the outer layer rubber 12 and the inner layer rubber 23 of the middle area 4, the 45-degree area 5 and the two side areas 6 of the shock absorber subjected to the extrusion deformation are approximately consistent. And the bulge position of the rubber layer does not exceed the end face of the partition plate.

In the installed state, under rated load plus dynamic fatigue load, under overload, the bulging shape of each rubber layer along an arc from the middle region 4 to the 45 ° region 5 to the positions of the two side regions 6 is close, that is, the cross-sectional shape of each rubber layer is close to unity. Due to the proximity of the bulging shapes, the strain at each rubber layer end zone 8 along the arc from the middle zone 4 to the 45 ° zone 5 to the two side zones 6 is close.

After the structure is installed, the bulging shapes of the end areas of each rubber layer at different positions along an arc are close, namely the cross-sectional shapes of each rubber layer are close to be consistent. Therefore, the stress uniformity of the rubber can be ensured, and the stress strain of the rubber at the position of the end part area is relatively uniform.

When the fan is operated under a rated load, in the same section of the end area, the maximum strain position of each rubber layer is at the position where the rubber layer is connected with the outer side clapboard, as shown in figure 10, and after actual deformation, the position is wrapped in the rubber layer. When the rubber is subjected to rated load and dynamic fatigue load, the strain amplitude of the position is small because the rubber at the position has no deformation space. Therefore, the rubber in the end area is not easy to bulge and crack, the adhesive surface of the rubber and the metal partition plate is peeled off, and the service life of the whole rubber is greatly prolonged. When the fan runs and is overloaded, the rubber of the end area 8 is extruded, and the extrusion deformation of the middle area 4, the 45-degree area 5 and the two side areas 6 is changed consistently and does not exceed the end face of the partition plate, so that collision or friction with other external parts is avoided, and the risk of damaging the rubber layer is reduced. Meanwhile, when the rubber is overloaded, the rubber in the end area 8 is not easy to crack under overload, the adhesive surface of the rubber and the metal partition plate is peeled off, and the like, so that the reliability of the rubber is greatly improved.

Referring to fig. 11 and 12, another novel surface-bearing shoe type gearbox damper has a cross-sectional shape of a middle area section 41, a cross-sectional shape of a 45 ° area section 51, and a cross-sectional shape of a side area section 61, which may be straight, concave or convex.

Referring to fig. 13, 14, 15 and 16, the shape of the holes in the middle zone 4 and 45 ° zone 5, and the profile shape of the side zone 6, may be plain rounded or may have a slope characteristic that the length of each rubber layer in contact with the adjacent two layers of the separator has a length difference, and the length of the outer side of each rubber layer is smaller than that of the inner side. The shape of the device can be a straight line, and can also be concave or convex.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.