CN103089815B - A kind of surface structure of end face sliding bearing of phyllotaxy arrangement lubrication oil drop - Google Patents

Abstract

A surface structure of an end sliding bearing with lubricating oil points arranged in phyllotaxy, characterized in that the arrangement of lubricating oil points on the working surface of the bearing conforms to the biological phyllotaxy theory, based on the H.Vogel model of the phyllotaxy theory: , , ; The geometric arrangement of lubricating oil points satisfies the law of golden section. That is, in polar coordinates, the polar angle between the <i>n</i> lubricating oil point and the <i>n+1</i> lubricating oil point is , the polar diameter of the <i>n</i> lubricating oil point is . Where <i>n</i> is the ordinal number of lubricating oil points, <i>c</i> is the distribution coefficient of lubricating oil points on the polar axis <i>ρ</i>, <i>c</i >The control is selected within the range of 2 to 6; the phyllotaxy arrangement of the lubricating oil points in the present invention conforms to the H.Vogel model of the phyllotaxy theory, and realizes the controllability of the geomorphology of the working surface, thereby controlling the distribution of the lubricating fluid in the bearing area and making the friction The temperature and frictional resistance are minimized, reducing the frictional resistance of the working surface and improving the lubrication conditions, etc., and finally improving the lubrication performance of the bearing.

Description

Surface structure of a face sliding bearing with lubricating oil points arranged in phyllotaxy

technical field

The invention belongs to the technical field of end face sliding bearings, and relates to a novel end face sliding bearing, in particular to a surface structure of an end face sliding bearing in which lubricating oil points are arranged in phyllotaxy.

Background technique

Sliding bearings are important parts (parts) that support rotation. Sliding bearings play an important role in heavy loads, high precision and corrosive media or in occasions with small radial structures. With the requirements of heavy load and high precision of mechanical movement, and the requirement of slewing support of high-precision micro-machine tools, new challenges are brought to the design of sliding bearings. In this case, sliding bearings have been widely used And development. According to the workability criterion of hydrodynamic bearings, there are many factors that affect the work of sliding bearings, such as minimum oil film thickness, bearing temperature rise, distribution uniformity of lubricating fluid, and hydrodynamic lubrication conditions. Among many influencing factors, the structure design of the working surface of the bearing is of great significance to the lubrication effect of the bearing, the rotation accuracy of the shaft, the rotation efficiency and the durability. At present, the lubricating oil points on the working surface of the end face sliding bearing are radially divergently distributed in strip grooves, and the equal parts of the circular concave points are distributed radially and linearly and dislocated. The design of these arrangements lacks a certain theoretical basis, which often leads to uneven distribution of the lubricating medium, which reduces the hydrodynamic lubrication performance, increases friction, and even causes high temperature and gluing due to uneven lubrication, so that the working surface is damaged. wait. Therefore, in order to solve the above problems, how to realize the engineering design of the sliding bearing working surface is the key technology in the field of sliding bearings.

In recent years, the theoretical research on friction and drag reduction of non-smooth surfaces has shown that the geomorphic features and structural forms of the sliding friction working surface play a key role in improving the lubrication performance and reducing friction, but in the engineering design of the end bearing working surface , there is a problem of rational selection of friction surface structure design parameters, and there is still a lack of theoretical basis for design. If the parameters related to the distribution of oil points on the working surface of the end sliding bearing are improperly selected, it will cause instability in the rotation process, large frictional resistance and insufficient lubrication.

Therefore, the present invention is based on the H. Vogel model of phyllotaxy theory in biological sciences, that is, the phyllotaxy theory of biology shows that the geometric arrangement of leaves, petals, grains of fruits and fish scales of plants meets the law of the golden section. According to this theory, the lubricating oil point on the working surface of the end sliding bearing is designed. The end face sliding bearing with phyllotaxy arrangement lubricating oil points has the ability to solve the above-mentioned problems in lubrication. Achieve uniform lubrication of end face sliding bearings.

Contents of the invention

The object of the present invention is to provide a surface structure of an end face sliding bearing in which lubricating oil points are arranged in phyllochronic order. This structure effectively improves the rotation efficiency and service life of the bearing.

The technical solutions adopted are:

A surface structure of an end face sliding bearing with lubricating oil points arranged in phyllotaxy, characterized in that the arrangement of lubricating oil points on the working surface of the bearing conforms to the biological phyllotaxy theory, based on the H.Vogel model of phyllotaxy theory: φ=n *θ, n=0,1,2,...n _max ; the geometric arrangement of lubricating oil points satisfies the law of golden section. That is, in polar coordinates, the polar angle between the nth lubricating oil point and the n+1th lubricating oil point is θ=137.508°, and the polar diameter of the nth lubricating oil point is Among them, n is the ordinal number of lubricating oil points, c is the distribution coefficient of lubricating oil points on the polar axis, and c is selected within the range of 2 to 6.

The design of the lubricating oil point above is in line with the characteristics of the body surface of the organism. The lubricating oil point can be hemispherical crown or fish scale. The direction of inclination along the direction of bearing rotation satisfies the necessary and sufficient conditions for hydrodynamic lubrication.

The diameter d of the above-mentioned hemispherical crown-shaped lubricating oil point is controlled within the range of 2mm-4mm, the depth h of the lubricating oil point is within the range of 0.03d-0.08d; the length L of the fish-scale lubricating oil point is controlled within the range of 2mm-4mm, The depth ω of the lubricating oil point is in the range of 0.03L to 0.08L.

The above-mentioned area ratio of lubricating oil spots (the ratio of the sum of the areas of all lubricating oil spots to the area of the working surface of the bearing) is controlled within the range of 10% to 20%.

The principle on which the invention is based

The invention is an end surface sliding bearing with lubricating oil points arranged in phyllotaxy, which is designed based on the biological phyllotaxy theory.

The principle of anti-friction and resistance of biological body surface characteristics shows that the body surface of fish, pangolin, dung beetle, etc. resistance. Therefore, in the engineering design of the working surface of the end sliding bearing, the lubricating oil points with the principle of fluid lubrication can be arranged according to the phyllotaxy theory, and finally achieve the effect of reducing friction and resistance, and improving the lubrication performance and service life.

The phyllotaxy theory of biology shows that the geometric arrangement of leaves, petals, grains of fruits and fish scales of plants satisfies the law of golden section. Among them, the H.Vogel model reveals the distribution law of the grains in the end space of the cycloidoid. H. Vogel model φ=n*θ, n=0,1,2,...,n _max ; that is, in polar coordinates, the polar angle between the nth grain and the n+1th grain is θ=137.508°, and the nth grain is in polar coordinates polar diameter where n is the ordinal number of the kernel and c is the distribution coefficient. The H.Vogel model is a regular model for the arrangement of biological grains and petals. The arrangement of this structure achieves spatial complementarity geometrically and satisfies the golden ratio. It has the maximum absorption capacity of the surface for heat radiation. Sequential helical grooves have generation and uniform distribution effects on fluids. Therefore, in the engineering design of the working surface of the end bearing, each lubricating oil point can be regarded as a grain point, and the arrangement of the lubricating oil points on the working surface of the end sliding bearing is designed according to the H.Vogel model, forming a phyllodes arrangement Face plain bearings with lubricating oil points. At the same time, due to the phyllotaxy arrangement of lubricating oil points, the position controllability of lubricating oil points can be realized by changing the parameters in the H. The lubricating performance of the end face sliding bearings arranged in phyllotaxy is optimized, and finally achieves the effect of improving the friction performance and increasing the life of the bearing.

The advantages of the present invention are:

The invention applies the phyllotaxy theory in biology to the engineering design of the bearing working surface in the field of end sliding bearings, so that the topography of the working surface of the end sliding bearing meets the H.Vogel model of phyllotaxy arrangement, and realizes that the topography of the working surface can be adjusted. Controllability, so as to control the distribution of lubricating fluid in the bearing area. During the rotation of the support shaft, it can obtain higher lubrication effect, reduce frictional resistance, adequate lubrication, reduce frictional heat damage, improve lubrication conditions, and increase the service life of the bearing. , rotation efficiency, and ultimately improve the lubrication performance of the bearing, which is of great significance to the development and application of the bearing.

Description of drawings

Fig. 1 is a diagram of the arrangement of scale phyllotaxy on the body surface of an organism.

Fig. 2 is a phyllotaxy structure arrangement diagram of a kind of biological fruit seed grain.

Figure 3 is the H. Vogel mathematical model of the phyllotaxy theory.

Figure 4 is a diagram of the relationship between three adjacent points in the H. Vogel mathematical model of the phyllotaxy theory.

Fig. 5 is a morphological diagram of an end face sliding bearing with lubricating oil points arranged in fish-scale phyllotaxy.

Fig. 6 is an enlarged schematic diagram of lubricating oil points arranged in fish scale phyllotaxy.

Fig. 7 is an A-A cross-sectional schematic diagram of lubricating oil points arranged in fish scale phyllotaxy.

Fig. 8 is a morphological diagram of the end face sliding bearing with hemispherical crown-shaped phyllotaxy arrangement of lubricating oil points.

Fig. 9 is an enlarged schematic diagram of lubricating oil points arranged in hemispherical canopy phyllotaxy.

Fig. 10 is a B-B cross-sectional schematic diagram of lubricating oil points arranged in hemispherical canopy phyllotaxy.

Fig. 11 is a schematic diagram of distribution of grain blocks with distribution coefficient c=2.4.

Fig. 12 is a schematic diagram of distribution of grain blocks with distribution coefficient c=2.0.

Fig. 13 is a schematic diagram of distribution of grain blocks with distribution coefficient c=1.8.

Fig. 14 is a schematic diagram of distribution of grain blocks with distribution coefficient c=1.4.

Fig. 15 is a schematic diagram of distribution of grain blocks with distribution coefficient c=1.2.

In the figure, 1 is the scale matrix, 2 is the helix of the scale phyllotaxy clockwise, 3 is the helix of the phyllotaxy of the scale counterclockwise, 4 is the seed grain, 5 is the helix of the leaf row of the grain in the clockwise direction, and 6 is the leaf row of the grain in the counterclockwise direction Helical lines, 7, 8, and 9 are three nodes, 10 is the end face sliding bearing, 11 is the partial enlarged view of the fish scale oil point, 12 is the end face sliding bearing, 13 is the partial enlarged view of the hemispherical crown oil point, and 14 is the The location of the lubricating oil point, 15 is the end face sliding bearing, θ _n , θ _n+1 , θ _n+2 are the angles from the nth, n+1, n+2th grain point to the ρ axis. ρ _n , ρ _n+1 , ρ _n+2 are the polar diameters of the nth, n+1, and n+2th grain points.

Detailed ways

A surface structure of the end sliding bearing with lubricating oil points arranged in phyllotaxy, which conforms to the phyllotaxic structure arrangement of fish scales and biological fruit seeds in Figures 1 and 2, using CAD software based on the H.Vogel model (θ =137.5°n, H=constant) design the oil dot pattern arranged according to the phyllotaxy theory. As shown in Figure 3, 7, 8, and 9 are the nth, n+1, and n+2 grain points in the H.Vogel model respectively, and the angle between two adjacent grain points is 137.508°. The polar diameter of a grain point in the polar coordinate system The polar angle θ _n of the nth grain point in the polar coordinate system is 137.508°n.

Design the matrix structure of lubricating oil points arranged in phyllotaxy. Figure 5 shows the shape diagram of the lubricating oil point end face sliding bearing with fish-scale phyllotaxy arrangement. The structure size of the fish-scale lubricating oil point matrix is shown in Figure 5-7, and the length L of the oil point is controlled at 2mm~ Within the range of 4mm, the value of depth ω is 0.03L-0.08L, R=L/2. Treat each lubricating oil point as a grain point to design the shape diagram of the fish scale phyllotaxy arrangement lubricating oil point end face sliding bearing. Wherein each fish-scale lubricating oil point is placed along the bearing rotation direction to meet the hydrodynamic pressure effect. Figure 8 shows the shape diagram of the end face sliding bearing with lubricating oil points arranged in hemispherical crown-shaped phyllotaxy. The structural size of the hemispherical crown-shaped oil point base is shown in 13 in Figure 8-10, and the radius d of the oil point is controlled at 2mm~ Within the range of 4mm, the value of depth h is 0.03d～0.08d. Treat each lubricating oil point as a grain point to design the hemispherical canopy phyllotaxy arrangement of lubricating oil point end face sliding bearing shape diagram.

By changing the phyllotaxy distribution coefficient c in the H. Vogel model, the grain arrangement form under different distribution coefficients can be obtained. By controlling the value of c, the area ratio of the oil spots (the ratio of the sum of the areas of all oil spots to the area of the working surface of the bearing) is controlled within the range of 10% to 20%. The larger the value of c, the sparser the grain arrangement. The value range of c is: 2~6.

Claims (1)

1. A surface structure of an end face sliding bearing with phyllotaxy arrangement lubricating oil points, characterized in that: the arrangement of lubricating oil points on the bearing working surface conforms to the biological phyllotaxy theory, based on the H.Vogel model of phyllotaxy theory: φ=n*θ, n=0,1,2,...n _max ; the geometric arrangement of lubricating oil points satisfies the golden section law; that is, under polar coordinates, the distance between the nth lubricating oil point and the n+1th lubricating oil point The polar angle is θ=137.508°, and the polar diameter of the nth lubricating oil point is Among them, n is the ordinal number of lubricating oil points, c is the distribution coefficient of lubricating oil points on the polar axis, and c is selected within the range of 2 to 6; The design of the lubricating oil point above is in line with the characteristics of the body surface of the organism. The lubricating oil point is hemispherical crown or fish scale type. The direction along the direction of bearing rotation meets the necessary and sufficient conditions for hydrodynamic lubrication; The diameter d of the above-mentioned hemispherical crown lubricating oil spot is controlled within the range of 2mm to 4mm, the depth h of the lubricating oil spot is within the range of 0.03d-0.08d, and the length L of the fish scale lubricating oil spot is controlled within the range of 2mm to 4mm. The depth ω of the lubricating oil point is in the range of 0.03L to 0.08L; The area ratio of the above lubricating oil spots is controlled within the range of 10% to 20%. Area ratio: the ratio of the sum of the areas of all lubricating oil spots to the area of the bearing working surface.