Double-half-inner-ring angular contact ball bearing evaluation method based on deflection unsteady state condition

Abstract

The invention discloses a double-half-inner-ring angular contact ball bearing evaluation method based on a deflection unsteady state condition, belongs to the technical field of double-half-inner-ring angular contact ball bearing design and manufacturing, and aims to solve the problem that an existing bearing size design evaluation method is carried out under the steady state condition. Establishing a double-half-inner-ring angular contact bearing kinetic analysis model by adopting a bearing kinetic analysis tool, and outputting contact stress and sliding speed of each position of a raceway; carrying out a sample block test to obtain a sliding speed and a contact stress, and drawing a criterion diagram of a bearing failure boundary meeting a deflection unsteady state condition; calculating the product of the contact stress and the sliding speed, comparing the product in a criterion diagram of a bearing failure boundary, judging that the structure size is feasible when the value of the contact stress * the sliding speed is less than the bearing failure boundary, and judging that the structure size is feasible when the value of the contact stress * the sliding speed is greater than or equal to the bearing failure boundary. And judging that the initial structure size does not meet the deflection unsteady state condition. The method is used for bearing design and manufacturing.

Description

Technical Field

[0001] The invention relates to an evaluation method for a double-half inner ring angular contact ball bearing based on a skew non-steady-state condition, and belongs to the technical field of design and manufacturing of double-half inner ring angular contact ball bearings. Background Art

[0002] Double-half inner ring angular contact ball bearings are commonly used main shaft bearings in engines. The dimensional design of double-half inner ring angular contact ball bearings is crucial. Therefore, evaluating the dimensional design of double-half inner ring angular contact ball bearings in the design stage before manufacturing is a key technical means for manufacturing double-half inner ring angular contact ball bearings.

[0003] The existing methods for evaluating the dimensional design of double-half inner ring angular contact ball bearings are all design analyses carried out under steady-state conditions. The applicability of the bearing design scheme under non-steady-state working conditions such as deflection cannot be evaluated, and a design scheme that adapts to non-steady-state working conditions such as deflection cannot be obtained in the early stage of bearing design. This will lead to bearing failures such as high-position sliding due to deflection working conditions during use. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the existing dimensional design evaluation methods of double-half inner ring angular contact ball bearings are all carried out under steady-state conditions, and to provide a double-half inner ring angular contact ball bearing evaluation method based on skew non-steady-state conditions.

[0005] The double-half inner ring angular contact ball bearing evaluation method based on the deflection non-steady-state condition of the present invention comprises:

[0006] S1. According to the operating conditions and structural dimensions of the double-half inner ring angular contact ball bearing, a bearing dynamics analysis tool is used to establish a dynamics analysis model for the double-half inner ring angular contact bearing;

[0007] S2, the dynamic analysis model of double half inner ring angular contact bearing outputs the contact stress and sliding velocity at each position of the raceway;

[0008] S3. Use the sample block to conduct a sample block test to obtain the sliding velocity and contact stress, and use the sliding velocity as the abscissa and the contact stress as the ordinate to draw a criterion diagram of the bearing failure boundary that meets the skew non-steady-state condition;

[0009] S4. Calculate the product of the contact stress and sliding velocity obtained in S2: contact stress × sliding velocity, compare the contact stress × sliding velocity with the criterion diagram of the bearing failure boundary obtained in S3, when the value of the contact stress × sliding velocity is less than the bearing failure boundary, determine that the structural size is feasible, when the value of the contact stress × sliding velocity is greater than or equal to the bearing failure boundary, determine that the initial structural size does not meet the skew non-steady-state condition, change the structural size, and return to execute S1.

[0010] Preferably, the operating conditions of the double half inner ring angular contact ball bearing described in S1 include: rotational speed, axial load, radial load and deflection angle.

[0011] Preferably, the structural dimensions of the double half inner ring angular contact ball bearing described in S1 include: inner groove radius, outer groove radius, steel ball diameter, number of steel balls, pitch circle diameter, inner ring eccentricity, radial clearance, cage guide clearance and cage pocket clearance.

[0012] Preferably, the criterion diagram of the bearing failure boundary specifically includes:

[0013] When the sliding speed is 5 m / s, the contact stress is 3.6 Gpa;

[0014] When the sliding speed is 10 m / s, the contact stress is 2.6 Gpa;

[0015] When the sliding speed is 15 m / s, the contact stress is 1.8 Gpa;

[0016] When the sliding speed is 20 m / s, the contact stress is 1.6 Gpa;

[0017] When the sliding speed is 25 m / s, the contact stress is 1.5 Gpa;

[0018] When the sliding speed is 30 m / s, the contact stress is 1.4 GPa.

[0019] Advantages of the present invention: Based on the evaluation method of double-half inner ring angular contact ball bearings under non-steady-state conditions of deflection, a design evaluation method of double-half inner ring angular contact ball bearings taking into account non-steady-state conditions of deflection is proposed. Through this design evaluation method, bearing designers can be guided to optimize the design of bearing structures, form a bearing design scheme that takes into account non-steady-state working conditions such as deflection, and prevent bearings from failing due to high-position sliding and other failures caused by deflection working conditions during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a flowchart of the double-half inner ring angular contact ball bearing evaluation method based on the deflection non-steady-state condition of the present invention;

[0021] Figure 2 It is a criterion diagram of the bearing failure boundary described in the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0025] Embodiment 1:

[0026] Combine the following Figure 1 and Figure 2 The present embodiment is described. The double-half inner ring angular contact ball bearing evaluation method based on the deflection non-steady-state condition described in the present embodiment comprises:

[0027] S1. According to the operating conditions and structural dimensions of the double-half inner ring angular contact ball bearing, a bearing dynamics analysis tool is used to establish a dynamics analysis model for the double-half inner ring angular contact bearing;

[0028] S2, the dynamic analysis model of double half inner ring angular contact bearing outputs the contact stress and sliding velocity at each position of the raceway;

[0029] S3. Use the sample block to conduct a sample block test to obtain the sliding velocity and contact stress, and use the sliding velocity as the abscissa and the contact stress as the ordinate to draw a criterion diagram of the bearing failure boundary that meets the skew non-steady-state condition;

[0030] S4. Calculate the product of the contact stress and sliding velocity obtained in S2: contact stress × sliding velocity, compare the contact stress × sliding velocity with the criterion diagram of the bearing failure boundary obtained in S3, when the value of the contact stress × sliding velocity is less than the bearing failure boundary, determine that the structural size is feasible, when the value of the contact stress × sliding velocity is greater than or equal to the bearing failure boundary, determine that the initial structural size does not meet the skew non-steady-state condition, change the structural size, and return to execute S1.

[0031] Furthermore, the operating conditions of the double half inner ring angular contact ball bearing described in S1 include: rotational speed, axial load, radial load and deflection angle.

[0032] Furthermore, the structural dimensions of the double semi-inner ring angular contact ball bearing described in S1 include: inner groove radius, outer groove radius, steel ball diameter, number of steel balls, pitch circle diameter, inner ring eccentricity, radial clearance, cage guide clearance and cage pocket clearance.

[0033] Furthermore, the criterion diagram of the bearing failure boundary specifically includes:

[0034] When the sliding speed is 5 m / s, the contact stress is 3.6 Gpa;

[0035] When the sliding speed is 10 m / s, the contact stress is 2.6 Gpa;

[0036] When the sliding speed is 15 m / s, the contact stress is 1.8 Gpa;

[0037] When the sliding speed is 20 m / s, the contact stress is 1.6 Gpa;

[0038] When the sliding speed is 25 m / s, the contact stress is 1.5 Gpa;

[0039] When the sliding speed is 30 m / s, the contact stress is 1.4 GPa.

[0040] In the present invention, the operating conditions of the double-half inner ring angular contact ball bearing are first determined, including the rotational speed, axial load, radial load, and deflection angle; the main initial structural dimensions of the bearing are input, including the inner groove radius, the outer groove radius, the steel ball diameter, the number of steel balls, the pitch circle diameter, the inner ring eccentricity, the radial clearance, the cage guide clearance, and the cage pocket clearance; a dynamic analysis model of the double-half inner ring angular contact ball bearing is established; the contact stress and sliding speed at each position of the raceway are calculated through the bearing dynamics analysis; when the value of the contact stress×sliding speed is less than the failure boundary, it is considered that the structural dimension scheme is feasible; when the value of the contact stress×sliding speed is greater than or equal to the failure boundary, it is considered that the structural dimension scheme does not meet the deflection non-steady-state operating conditions, and the bearing structural dimensions need to be changed until the changed dimension scheme meets the criterion conditions.

[0041] The double-half-inner-ring angular contact ball bearing evaluation method based on the non-steady-state condition of deflection described in the present invention can quickly form a bearing design scheme that takes into account non-steady-state working conditions such as deflection, thereby preventing the bearing from failing due to high-position sliding and other failure problems caused by deflection working conditions during use.

[0042] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. Evaluation method for double-half inner ring angular contact ball bearing based on deflection non-steady-state conditions, characterized in that it include: S1. According to the operating conditions and structural dimensions of the double-half inner ring angular contact ball bearing, a bearing dynamics analysis tool is used to establish a dynamics analysis model for the double-half inner ring angular contact bearing; S2, the dynamic analysis model of double half inner ring angular contact bearing outputs the contact stress and sliding velocity at each position of the raceway; S3. Perform a sample test using a sample block to obtain the sliding velocity and contact stress, and draw a criterion diagram of the bearing failure boundary that meets the skew non-steady-state condition with the sliding velocity as the abscissa and the contact stress as the ordinate; S4. Calculate the product of the contact stress and sliding velocity obtained in S2: contact stress × sliding velocity, compare the contact stress × sliding velocity with the criterion diagram of the bearing failure boundary obtained in S3, when the value of the contact stress × sliding velocity is less than the bearing failure boundary, determine that the structural size is feasible, when the value of the contact stress × sliding velocity is greater than or equal to the bearing failure boundary, determine that the initial structural size does not meet the skew non-steady-state condition, change the structural size, and return to execute S1.

2. The double-half inner ring angular contact ball bearing evaluation method based on skew non-steady-state conditions according to claim 1 is characterized in that: The operating conditions of the double-half inner ring angular contact ball bearing described in S1 include: rotational speed, axial load, radial load and deflection angle.

3. The double-half inner ring angular contact ball bearing evaluation method based on skew non-steady-state conditions according to claim 1 is characterized in that: The structural dimensions of the double semi-inner ring angular contact ball bearing described in S1 include: inner groove radius, outer groove radius, steel ball diameter, number of steel balls, pitch circle diameter, inner ring eccentricity, radial clearance, cage guide clearance and cage pocket clearance.

4. The double-half inner ring angular contact ball bearing evaluation method based on skew non-steady-state conditions according to claim 1 is characterized in that: The criterion diagram of the bearing failure boundary specifically includes: When the sliding speed is 5 m / s, the contact stress is 3.6 Gpa; When the sliding speed is 10 m / s, the contact stress is 2.6 Gpa; When the sliding speed is 15 m / s, the contact stress is 1.8 Gpa; When the sliding speed is 20 m / s, the contact stress is 1.6 Gpa; When the sliding speed is 25 m / s, the contact stress is 1.5 Gpa; When the sliding speed is 30 m / s, the contact stress is 1.4 GPa.

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