CN106438707A - Deep cave honeycomb hole system hollow cylindrical roller bearing - Google Patents

Abstract

The invention discloses a hollow cylindrical roller bearing of a deep-cavity honeycomb small-hole system, which comprises a cylindrical roller with a deep-cavity hollow structure formed by a deep-cavity hole and a middle hole. There are multiple communicating holes with the same diameter as the middle hole, and the cylindrical roller forms a honeycomb structure through the middle hole and multiple communicating holes. It is preferable that the hole, the middle hole and the connecting hole are all filled with the vibration-absorbing material of the overall structure, and a keyway for preventing the vibration-absorbing material from slipping is formed on the wall of the hole; Defined transitions for smooth connections. The beneficial effect of the present invention is that the rigidity of the roller is improved by distributing the mesopores and communicating holes in a honeycomb shape and filling the vibration-absorbing material; the transition curve between the two ends of the roller and the arc segment determined by the function method overcomes the curvature of the arc segment and the straight line segment The problem of discontinuous change can eliminate the stress concentration phenomenon caused by the sudden change of curvature; the bearing capacity and fatigue life of the roller can be improved from two aspects.

Description

A Hollow Cylindrical Roller Bearing with Deep Cavity Honeycomb and Small Holes

technical field

The invention relates to a cylindrical roller bearing, in particular to a hollow cylindrical roller bearing of a deep cavity honeycomb small hole system.

Background technique

As an important basic component, the working performance of cylindrical roller bearings directly affects the performance of mechanical equipment. With the development of mechanical equipment towards high precision, high speed and heavy load, the requirements for the load capacity, dynamic performance and fatigue life of cylindrical roller bearings are also increasing. However, traditional solid cylindrical roller bearings have problems such as low bearing accuracy, large vibration and noise, and fatigue under high-speed and heavy-load conditions. Although hollow cylindrical roller bearings and deep cavity hollow cylindrical roller bearings of different structures have appeared at present, the technical problems existing in traditional solid cylindrical roller bearings can be eliminated to an appropriate degree, but these structural forms all use a single through-hole However, it is still difficult to solve the problems of large bending stress on the inner hole wall and prone to bending fatigue fracture failure under high-speed and heavy-load conditions.

Contents of the invention

The purpose of the present invention is to address the deficiencies of the prior art and provide a hollow cylindrical roller bearing with deep cavity honeycomb and small pores. The through-type cavity of the bearing is arranged in a honeycomb hole shape, which combines the advantages of the hollow structure and the deep cavity hollow structure. , increase the space for heat dissipation and lubricating oil storage; and use the high structural strength of the honeycomb structure to disperse and reduce the bending stress on the inner wall of the perforation and improve the fatigue life.

In order to achieve the above object, the present invention adopts the following technical solutions.

A deep-cavity honeycomb small-hole hollow cylindrical roller bearing, including a cylindrical roller with a deep-cavity hollow structure formed by a deep-cavity hole and a middle hole. There are multiple communicating holes, and the cylindrical roller forms a honeycomb structure through the middle hole and multiple communicating holes.

In the present invention adopting the above-mentioned technical solution, the middle part of the roller forms a honeycomb structure through the middle hole and the communicating hole with the same diameter as the middle hole. It not only combines the advantages of hollow structure and deep cavity hollow structure, but also increases the space for heat dissipation and storage of lubricating oil; it also utilizes the high structural strength of the honeycomb structure to disperse and reduce the bending stress of the perforated inner wall and improve the fatigue life.

Preferably, the deep hole is one of straight hole, tapered hole and circular arc hole. To provide a variety of options, according to the diameter and length of the roller, to meet the specific selection of the bearing load range, fatigue life requirements, etc.

Preferably, all three of the hole, the middle hole and the communicating hole are filled with a vibration-absorbing material. The vibration-absorbing material is filled in the hole system of the bearing roller, which improves the stress and stress distribution inside the hole, and improves the bearing capacity of the roller. While improving the fatigue life of the bearing, it also has a certain buffering and vibration-absorbing ability, which is beneficial Improve the vibration and noise level of the bearing.

Further preferably, the vibration-absorbing material filled in the hole, the middle hole and the communicating hole has an integral structure. By integrating the filler body, the rigidity of the roller is improved, and the bearing capacity and fatigue life of the roller are further improved.

Further preferably, key grooves for preventing the vibration-absorbing material from slipping are formed on the walls of the holes. The relative slip between the filling body and the roller body is improved through the anti-slip keyway, the rigidity between the two is improved, and the bearing capacity and fatigue life of the roller are further improved.

Further preferably, the vibration-absorbing material includes one or more of polytetrafluoroethylene, nylon and silicone rubber. In order to make full use of materials with certain strength, rigidity and shock absorption performance in the field of existing materials, it is convenient for direct procurement and saves research and development costs.

Further preferably, both ends of the cylindrical roller are terminated by symmetrically arranged circular arc segments, and the circular arc segment and the cylindrical segment are smoothly connected through a transition segment; the transition segment is defined as: taking the central axis of the cylindrical roller as the X axis In the XY plane of , the coordinates of the arc segment at the outer end of the cylindrical segment in the direction of increasing X value are X=l ₁ , Y=0, and the contour lines of the arc segment and the cylindrical segment pass through the curve f(x ) transition connection, the equation expression of the curve f(x) is:

Among them, H and L are obtained by solving the following equations simultaneously:

In the formula: x is the abscissa of the curve f(x), and coincides with the central axis of the cylindrical roller; d is the diameter of the cylindrical roller; l ₁ is the abscissa of the center of the ending arc; l ₂ is the starting point of the f(x) curve The absolute value of the difference between the abscissa and the end point; h is the absolute value of the difference between the starting point of the curve f(x) and the end point of the ordinate; H is the peak value of the curve f(x), and L is the period of the curve f(x). To overcome the problem of discontinuous curvature changes in the arc segment and straight line segment, and eliminate the stress concentration phenomenon in the straight line segment and arc segment due to sudden changes in curvature.

The beneficial effect of the present invention is that, by setting the roller mesopore and the communicating hole as a honeycomb distribution with equal diameters, and filling the shock-absorbing tetrafluoroethylene, nylon and silicone rubber in the deep holes at both ends, the mesopore and the communicating hole One or more of them; the rigidity of the roller is improved, the bearing capacity and fatigue life of the roller are improved; at the same time, the transition curve between the two ends of the roller and the arc segment determined by the function method overcomes the arc segment and the straight line segment The problem of discontinuous curvature change eliminates the stress concentration phenomenon of straight line and arc segments due to sudden curvature changes; from another aspect, the bearing capacity and fatigue life of the rollers are improved.

Description of drawings

Fig. 1 is a schematic isometric view of the structure of Embodiment 1 of the present invention.

Fig. 2 is a schematic structural view of Example 1 of the present invention without fillers.

Fig. 3 is a left side view of Fig. 2 of the present invention.

Fig. 4 is a schematic structural view of the filling body contained in Example 1 of the present invention.

Fig. 5 is a schematic plan view of the outer contour line in the present invention.

Fig. 6 is a schematic structural view of Example 2 of the present invention without fillers.

Fig. 7 is a schematic structural view of Example 3 of the present invention without fillers.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the described embodiments.

Embodiment 1, see Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, a hollow cylindrical roller bearing with small holes in a deep-cavity honeycomb, including a deep-cavity hollow structure formed by a deep-cavity hole 1 and a middle hole 2 In the cylindrical roller, the outer periphery of the middle hole 2 is distributed with a plurality of communicating holes 3 located within the scope of the deep hole 1 and equal to the diameter of the middle hole 2. The cylindrical roller forms a honeycomb structure through the middle hole 2 and the plurality of communicating holes 3. Among them, the deep hole 1 is a straight hole; the hole wall of the hole 1 is formed with a keyway 4 for preventing the vibration-absorbing material from slipping; the hole 1, the middle hole 2 and the connecting hole 3 are all filled with the vibration-absorbing material, and the three The vibration-absorbing material filled in it has an integral structure; the vibration-absorbing material includes one or more of polytetrafluoroethylene, nylon and silicon rubber.

Among them, the two ends of the cylindrical roller are terminated by a symmetrically arranged arc segment, and the arc segment and the cylindrical segment are smoothly connected by a transition section; the transition section is defined as: in the XY plane with the central axis of the cylindrical roller as the X axis, located at The circle center coordinates of the circular arc section at the outer end of the cylindrical section in the X value increasing direction are X=l ₁ , Y=0, and the contour lines of the circular arc section and the cylindrical section are transitionally connected by forming the curve f(x) of the transition section. The equation expression of f(x) is:

Among them, H and L are obtained by solving the following equations simultaneously:

In the formula: x is the abscissa of the curve f(x), which coincides with the central axis of the cylindrical roller; d is the diameter of the cylindrical roller; l ₁ is the abscissa of the center of the ending arc; l ₂ is the starting point of the f(x) curve The absolute value of the difference between the abscissa and the end point; h is the absolute value of the difference between the starting point of the curve f(x) and the end point of the ordinate; H is the peak value of the curve f(x), and L is the period of the curve f(x).

Embodiment 2, see Fig. 5, wherein the deep cave 1 is a tapered hole, the tapered surface of the tapered hole constitutes the wall of the deep cave 1, and the large end of the tapered hole faces outward.

The rest of the structure of this embodiment is the same as that of Embodiment 1, and will not be repeated here.

Embodiment 3, referring to FIG. 6 , wherein the deep cave hole 1 is an arc hole, and the arc surface of the arc hole constitutes the hole wall of the deep cave hole 1 .

The rest of the structure of this embodiment is the same as that of Embodiment 1, and will not be repeated here.

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims (7)

1. a kind of deep cave honeycomb aperture system hollow cylindrical roller bearing, empty including forming deep cave by deep cavities (1) and mesopore (2) The cylindrical roller of core structure, it is characterised in that mesopore (2) peripheral distribution has in the range of deep cavities (1), and and mesopore (2) isometrical multiple intercommunicating pores (3), cylindrical roller forms alveolate texture by mesopore (2) and multiple intercommunicating pores (3).

2. deep cave honeycomb aperture system hollow cylindrical roller bearing according to claim 1, it is characterised in that the deep cavities (1) be straight hole, the one kind in taper hole and circular hole.

3. deep cave honeycomb aperture system hollow cylindrical roller bearing according to claim 1, it is characterised in that the cavities (1), mesopore (2) and intercommunicating pore (3) three are all filled by vibration-absorbing material.

4. deep cave honeycomb aperture system hollow cylindrical roller bearing according to claim 3, it is characterised in that the cavities (1), the vibration-absorbing material that fills in mesopore (2) and intercommunicating pore (3) three is in overall structure.

5. deep cave honeycomb aperture system hollow cylindrical roller bearing according to claim 3, it is characterised in that the cavities (1) keyway (4) being formed with hole wall for preventing vibration-absorbing material from trackslipping.

6. deep cave honeycomb aperture system hollow cylindrical roller bearing according to claim 3, it is characterised in that the absorbing material Material includes one or more in politef, nylon and silicone rubber.

7. the deep cave honeycomb aperture system hollow cylindrical roller bearing according to any one in claim 1～6, its feature exists In the cylindrical roller two ends are finished up by symmetrically arranged arc section, and arc section is smoothly connected by changeover portion with cylindrical section； The changeover portion is defined as：In the X-Y plane with cylindrical roller central axis as X-axis, positioned at the cylinder of X value augment direction The central coordinate of circle of section outer end arc section is X=l₁, Y=0, arc section passes through to constitute the curve of changeover portion with the contour line of cylindrical section F (x) transition connects, and the equation expression formula of curve f (x) is：

$\begin{array}{cc}f\left(x\right)=\frac{H}{L}\·(x-l_1)-\frac{H}{2\mathrm{\π}}\·sin\left(\frac{2\mathrm{\π}\·(x-l_1)}{L}\right)-\frac{d}{2}& x\∈\[l_1,l_2+l_1\]\end{array};$

Wherein, H, L are obtained by below equation simultaneous solution：

$\left\{\begin{array}{c}\frac{H}{L}\·l_2-\frac{H}{2\mathrm{\π}}\·\sin \left(\frac{2\mathrm{\π}\·l_2}{L}\right)-\frac{d}{2}=-\frac{d}{2}+h\\ \frac{H}{L}-\frac{H}{L}\·\cos \left(\frac{2\mathrm{\π}\·l_2}{L}\right)=\frac{l_2}{\frac{d}{2}-h}\\ {(\frac{d}{2}-h)}^2+{l_2}^2=R^2\end{array}\right.$

In formula：X for curve f (x) abscissa, and with cylindrical roller central axes；D is cylindrical roller diameter；l₁For ending The abscissa in the circular arc center of circle；l₂Absolute value for f (x) origin of curve and terminal Diff E；H is curve f (x) Origin And Destination The absolute value of Diff N；H is the peak-to-peak value of curve f (x), and L is curve f (x) cycle.