RU2064616C1 - Method of assembling two-way rolling bearings - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: bearing is preliminary assembled using reference balls. The parameters of the bearing are then measured and the bearing is assembled again using the other balls. The diameter of the reference balls is presented in the invention description. To measure the parameters of the bearing, it is loaded radially. The radial space and skewing angle of the outer ring with respect to the inner ring are measured. The diameters of the balls that are used to assemble the bearing again are presented in the invention description. EFFECT: improved quality of assembling. 1 dwg

Description

 The invention relates to mechanical engineering, in particular to the manufacture of double-row angular contact ball bearings.

 A known method of completing parts for assembling double-row angular contact bearings by measuring the diameters of the grooves of the rings at the points of contact with the balls at a nominal contact angle with subsequent sorting of the balls and rings into groups, before sorting, additionally measure the distance between the contact points of the grooves of the outer ring at a nominal contact angle and the distance from the mounting end to the contact points of the groove of the inner rings (1).

 A disadvantage of the known method of assembling bearings is that it does not ensure the effective operation of the bearing under the influence of radial load, since due to errors in the manufacture of bearing parts, the inner rings are skewed relative to the outer ones, the operating conditions of the balls in the left and right rows are different. This is the reason for the decrease in the quality of assembly of bearings and a decrease in their operational properties.

 The closest in technical essence and the achieved effect to the claimed invention (prototype) is a method of assembling double-row bearings, including pre-assembly, measurement of assembly parameters, disassembly and reassembly with replacement of rolling elements (2).

 As an assembly parameter in this method, the distance between the ends of the rings under the action of axial load is used, and the diameters of the rolling bodies are determined based on the required change in the distance between the ends of the rings.

 The disadvantage of this method of mounting the bearing under the action of axial load on the inner rings is that the initial axial clearance in the bearing due to the deformation of the rings is selected and approaches zero, so the bearing assembly does not make sense in terms of the size of the axial clearance.

 The technical result of the invention is to eliminate this drawback and improve the quality of assembly of bearings.

где D₂₀ и D₁₀ средние диаметры дорожек качения соответственно наружного и внутреннего колец в заданной плоскости контакта,
измерение параметров сборки подшипника осуществляют под радиальной нагрузкой, при этом в качестве параметров измерения подшипника используют радиальный зазор и угол перекоса наружного кольца по отношению к внутренним, а повторную сборку подшипника осуществляют с шарами, диаметры которых в левом и правом рядах определяют по формуле

где ε отклонение замеренной величины радиального зазора Dp от номинального Δp_o, т.е. ε = Δp-Δp_o,
γ угол пepeкoca наружного кольца подшипника по отношению к внутреннему;

где l₁₀ номинальное расстояние между заданными плоскостями контакта дорожек внутренних колец;
l₂₀ номинальное расстояние между заданными плоскостями контакта дорожек наружных колец;
"+" для ряда шаров, в сторону которых возник перекос;
"-" для противоположного ряда.The problem is solved in that in the method of assembling double-row rolling bearings, including pre-assembly with reference balls, measuring assembly parameters, disassembly and reassembly with replacement of the rolling bodies, balls with a diameter are used as reference balls

where D ₂₀ and D _{10 the} average diameters of the raceways, respectively, of the outer and inner rings in a given plane of contact,
the measurement of the parameters of the bearing assembly is carried out under radial load, while the parameters of the measurement of the bearing use the radial clearance and the skew angle of the outer ring with respect to the inner ones, and the reassembly of the bearing is carried out with balls whose diameters in the left and right rows are determined by the formula

where ε is the deviation of the measured value of the radial clearance Dp from the nominal Δp _o , i.e. ε = Δp-Δp _o ,
γ is the angle of intersection of the outer ring of the bearing with respect to the inner;

where l _{10 is the} nominal distance between the given contact planes of the tracks of the inner rings;
l _{20 is the} nominal distance between the given contact planes of the tracks of the outer rings;
"+" for a number of balls in the direction of which there is a bias;
"-" for the opposite row.

 The method is illustrated in the drawing.

 The method is as follows.

Затем к подшипнику прикладывают радиальную нагрузку и производят измерение радиального зазора Δ_p и угла перекоса наружного кольца по отношению к внутреннему (γ). Подшипник разбирают и производят повторную сборку с шарами, диаметры которых в левом и правом рядах определяют по формуле

Осуществление предложенного способа сборки обеспечивает:
1. Заданный угол контакта в подшипнике

где β_ф фактический угол контакта под осевой нагрузкой.First, preassemble with reference balls, the diameter of which is selected based on the formula

Then a radial load is applied to the bearing and the radial clearance Δ _p and the skew angle of the outer ring with respect to the inner (γ) are measured. The bearing is disassembled and reassembled with balls, the diameters of which in the left and right rows are determined by the formula

Implementation of the proposed assembly method provides:
1. The specified contact angle in the bearing

where β _{f is the} actual contact angle under axial load.

 A change in the values reduced in the numerator and denominator slightly affects β, and a change in the subtracted in the numerator is offset by a change in the subtracted in the denominator.

 2. Elimination of perekoca rings, which leads to an increase in the difference in the values of the gaps between the balls and tracks in the left and right rows.

 This leads to an increase in the quality of assembly of bearings and an increase in their operational properties.

Claims (1)

A method of assembling double-row rolling bearings, including pre-assembly with reference balls, measuring assembly parameters of a bearing, disassembly and reassembly with replacement of swing bodies, characterized in that balls with a diameter are used as reference balls

where D ₂₀ and D _{10 are the} average diameters of the raceways of the outer and inner rings, respectively, in a given contact plane;
β _{o the} specified contact angle,
measurement of the parameters of the bearing assembly is carried out under radial load, while the radial clearance and the angle of skew of the outer ring with respect to the inner rings are used as the bearing measurement parameters, and the reassembly of the bearing is carried out with balls, the diameters of which for both rows are determined by the formula

where ε = ΔP-ΔP _{o the} deviation of the measured value of the radial clearance ΔP from the nominal ΔP _o ;
γ skew angle of the outer ring of the bearing with respect to the inner;

where l _{10 is the} nominal distance between the given contact planes of the tracks of the inner rings;
l _{20 is the} nominal distance between the given contact planes of the tracks of the outer rings;
"+" for a number of balls in the direction of which there is a bias;
"" for the opposite row.