JPS5965615A - Method of reducing energy consumption of bearing - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to reducing the energy consumption of bearings in machines, particularly motors.

As is well known, the work of frictional forces is converted into heat, reducing the efficiency of machines, especially bearings. Bearings generally include metal that ensures a connection between various members and rotates between these members.

However, it is possible to calculate or measure reference stresses in magnitude and direction that these metals can support over time on their support surfaces, and the magnitude of these stresses can be approximately constant or periodic.

It is therefore possible to calculate or measure the maximum stress on the bearing or metal for each radial direction of precisely determined position n relative to a given origin.

The present invention is designed to reduce the area of the bearing, that is, the metal support, especially the maximum stress to be supported in a given radial direction, rgj, and its reduction by 1! /'
The purpose is to adjust the area of rl';>.

Of course, for practical reasons it is possible to change the area by modifying the width of the membrane. The width of the membrane is based on a predetermined width corresponding to the maximum width calculated or measured for each of one or several angular regions, approaching the value that can be derived from the calculated or measured stress for each region. It will be done.

Furthermore, the variation of the anti-friction membrane between the various regions can generally be done with a slope of 30 to 60 degrees, preferably approximately 45 degrees.

In practice, in many cases the principal stress is applied in one specific direction or in two specific directions that are diametrically opposed. In this case, just reducing the width of the metal will suffice.

1) Reduction of the width of the anti-friction membrane can be obtained by any known processing method, in particular by milling.1) In the following specific example J, a connecting rod bearing (Figs. 5 to 7) 1 to 4 are explanatory diagrams of the method of manufacturing a half bearing according to the present invention.

In FIGS. 1 to 4, part 1 represents the outer frame of the tlqh receiver, and the anti-friction membrane 2, which has a constant original width, is inserted vertically into area 3 in such a way that it has a reduced width l. As shown in the radial cross section corresponding to A, B, or C, the area of width 1- and the area of width p are connected at an angle of 45 degrees.

Example 1 Figures 5 to 7 show connecting rods made of metal that can be obtained in accordance with the present invention. Shaft diameter 50mm, metal outer diameter 5
It is 4mm. The anti-friction alloy has a thickness of 0.25 mm+ and has the following composition (wt%): Sn: 20% CU: 1% Al: balance.

The original width is 20 mm with a groove 3, and the width is reduced to 11 mm for the connection area at 30° to the axis of rotation.

The tips of these various zones are each 23° starting from the joint surface 4, 1506. 240° and 315
°, and the direction of rotation of the axis is indicated by arrow F.

If ff1t e is J:, the energy consumption was 305 W at full load in the case of a constant width bearing, but changed to 268 W in the case of the bearing described above. In other words, this is a reduction of 37W, or a relative value of 12%.

This is 665k per connecting rod over the life of the motor.
This will save J.

A doctor inserted a metal piece into the motor's bearing. The inner diameter is 54 mm and the outer diameter is 58 mm. This width is 21m with the same characteristics as Example 1.
m, and the effective width is 120''' to - with respect to the joint surface 4.
- reduced to 12 mm in the area above +200°. The connection of these two areas is ensured by a 45° chamfer.

Compared to the energy consumption of 370 W per bearing of the same size for conventional bearings, the calculated savings are approximately 1060 kJ per bearing over the life of a motor of 55 W per bearing. This therefore represents a relative savings of 15%.

Tests conducted under the conditions of Examples 1 and 2 were satisfactory.

[Brief explanation of drawings]

1 to 4 are explanatory diagrams of the structure of a specific example of a half bearing according to the present invention, and FIG. 2 is an illustration of the structure of the A-Ali! shown in FIG. 1.
3 is a sectional view taken along the line B-B shown in FIG. 1, FIG. 4 is a sectional view taken along the line C-C shown in FIG. 1, and FIGS. 5 to 7 are explanatory diagrams of the bearing of the connecting rod. , and FIG. 6 is A shown in FIG. 5.
' = A sectional view, Figure 76 - Figure is shown in Figure 5 t B-B sectional view, Figures 8 and 9
The figure is an explanatory view of the linear axis of the shaft of the internal combustion engine, and FIG. 9 is a sectional view taken along the line A--A shown in FIG. 8. 1...Bearing outer frame, 2...Anti-friction film. 3...Miso. Representative Patent Attorney Hajime Imamura

Claims (1)

[Claims] (1) A method for reducing the energy consumption of a bearing comprising a metal, characterized in that the area of the friction surface of the metal is adjusted at every point according to the maximum standard stress experienced during operation. How to do it. (2) The method according to claim 1, wherein the adjustment of the area is carried out by modifying the width of the supporting surface of the anti-friction membrane. (3) The method according to claim 2, characterized in that the width is changed for each predetermined area. (4) Areas of varying width from 30° to 60°. 4. A method as claimed in claim 3, characterized in that the connection is gradual by a chamfer. 1-