GB/T 35023-2018 in English
VALIDMethods to assess the reliability of hydraulic components
- Issued on:-
- Implemented on:2018-12-01
- File Format:PDF
- Delivery:Via email within 5 business days
$359.00
| Standard No: | GB/T 35023-2018 |
| Document status: | VALID |
| Title in English: | Methods to assess the reliability of hydraulic components |
| Title in Chinese: | 液压元件可靠性评估方法 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Implemented on: | 2018-12-01 |
| ICS Classification: | 23.100.01-Fluid power systems in general |
| Chinese Classification: | J20-Hydraulic and pneumatic device |
| Professional Classification: | GB-National Standard |
| Related Keywords: | hydraulic components
hydraulic components introduction interpretation reliability evaluation evaluation methods key reliability indicators |
| Related Topics: | sex assessment
reliability assessment GB/T35023-2018 GBT35023 GB/T 35023-2018 Hydraulic Motor Reliability Test Silicon photomultiplier tube reliability assessment method |
《GB/T 35023-2018液压元件可靠性评估方法》由TC3（全国液压气动标准化技术委员会）归口，TC3SC1（全国液压气动标准化技术委员会液压传动和控制分会）执行，主管部门为中国机械工业联合会。
Introduction
Interpretation of the core content of the standard
This standard establishes a complete methodology system for reliability evaluation of hydraulic components, focusing on three evaluation methods:
| Evaluation method | Applicable scenario | Key parameters | Confidence requirement |
|---|---|---|---|
| Laboratory test analysis | Accelerated life test | MTTF, B10 life | ≥95% |
| Field data analysis | Operation product monitoring | Failure interval | Industry benchmark |
| Empirical test analysis | Small sample verification | Weibull slope β | 70-95% |
Key technology analysis
1. Weibull analysis method
The standard recommends the use of three-parameter Weibull distribution (β slope, η characteristic life, t0 minimum life) for reliability modeling:
Hydraulic pump and other components of the typical β value range: 1.5-4.0 (wear-out failure)
2.
Determine the key reliability indicators by median rank regression method:
| Parameters | Calculation formula | Sample value |
|---|---|---|
| Median rank | (Pr-0.3)/(Ntest+0.4) | 0.0946(7 samples) |
| B10life | η×[ln(1/0.9)]1/β | 11.5×106times |
Implementation points
Laboratory test specifications
- Sample size requirement: at least 4 valid samples (zero failure solution)
- Threshold setting: dynamic leakage ≤ 120% of rated value
- Termination condition: 50% of samples reach the failure threshold
Field data collection
Field data analysis of a directional valve shows:
| Failure mode | β value | B10Life (months) |
|---|---|---|
| Seal leakage | 3.92 | 78.8 |
| Electrical failure | 0.94 | 123.7 |
Analysis of Standard Evolution
Compared with ISO/TR 19972-1:2009, this standard adds:
- Zero/single failure judgment method for empirical test
- Localization value recommendation of Weibull parameter
- Classification of unique failure modes of hydraulic components
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