GB/T 36254-2018 in English
VALIDStandard light annular ball bearings primarily for aircraft generators and motor-generators
- Issued on:2018-06-07
- Implemented on:2019-01-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$97.00
《GB/T 36254-2018航空电机用标准轻型深沟球轴承》由TC435（全国航空器标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Interpretation of GB/T 36254-2018 Standard Lightweight Deep Groove Ball Bearings for Aviation Motors
1. Background and Significance of the Standard
GB/T 36254-2018 "Standard Lightweight Deep Groove Ball Bearings for Aviation Motors" is an industry standard formulated by China in combination with international advanced standards to meet the needs of the development of modern aviation technology. This standard is mainly applicable to lightweight deep groove ball bearings used in equipment such as aviation motors, generators and converters.
1.1 Background of Standard Formulation
With the development of aerospace technology, the requirements for bearing performance are increasing. In order to meet the requirements of high precision, long life, high temperature resistance and corrosion resistance, China Aviation Industry Corporation jointly drafted this standard with a number of scientific research institutions.
2. Standard framework and key clauses
| Clause number | Clause content | Interpretation |
|---|---|---|
| 1 Scope | Specifies the structure, size and requirements of the bearing. | Clearly defines the scope of application to ensure the correct selection. |
| 2 Normative references | Lists relevant standards and specifications. | Ensures the traceability of technical requirements. |
| 4 Structure, size and requirements | Specifies the technical parameters of the bearing in detail. | Provides specific design basis. |
3. Interpretation of key technical requirements
3.1 Structure and size
The standard light deep groove ball bearing for aviation motors adopts a rounded corner design. The specific structure is shown in Figure 1. The dimensional tolerance requirements are strict, and the unmarked chamfer size is 0.1~0.4mm.
Case analysis
For example, the parameters of bearing model 1 in Table 1 are: inner diameter 10mm, outer diameter 30mm, width 6mm. Its maximum speed (grease lubrication) is 16,000r/min, (oil lubrication) is 30,000r/min.
4. Lubrication and sealing requirements
| Lubrication type | Applicable standards | Performance characteristics |
|---|---|---|
| MIL-PRF-27617D Type III | Anti-oil oxidant | Suitable for high temperature environments |
| MIL-PRF-81322 | Wide temperature range | Adapt to extreme cold and extreme heat conditions |
5. Benefits of standardization
- Improve bearing manufacturing consistency
- Reduce maintenance costs
- Extend equipment service life
- Ensure aviation safety
6. Implementation recommendations
6.1 Selection guide
Select the appropriate model according to the equipment working conditions, giving priority to high-precision and long-life bearings.
6.2 Material selection
95Cr18 or GCr15Z materials are recommended for rings and rolling elements, and fluororubber is recommended for sealing rings.
7. Technology evolution analysis
From the early MIL specifications to the modern GB/T standards, bearing technology has evolved from material improvement to performance optimization. In the future, it will develop in the direction of intelligence and adaptability.
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