GB/T 7586-2018 in English
VALIDEarth-moving machinery—Hydraulic excavators—Test methods
- Issued on:2018-12-28
- Implemented on:2019-07-01
- File Format:PDF
- Delivery:Within 1 day
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《GB/T 7586-2018土方机械 液压挖掘机 试验方法》由TC334（全国土方机械标准化技术委员会）归口，主管部门为中国机械工业联合会。
Introduction
Analysis of core changes in the standard
| Key changes | 2008 version | 2018 version |
|---|---|---|
| Test site specifications | Dispersed in multiple chapters | Concentrated in Article 4.4 for unified regulations |
| New test items | 13 items | New fuel consumption rate (Chapter 14), air conditioning refrigerant (Chapter 15) and other 16 items |
| Reliability test | Industrial test | According to GB/T 36693 implements more stringent methods |
Detailed explanation of key test methods
1. Digging force measurement (Chapter 7)
GB/T 13332 standard method is adopted. It needs to be carried out under the condition of hydraulic oil temperature of 50±3℃. The engine maintains rated speed during the test. The measurement points should include key parts such as bucket tooth tip and bucket arm hydraulic cylinder.
2. Noise Test (Chapter 10)
Case: The noise test at the driver's ear of a certain model of 20-ton excavator shows:
No-load condition: 82dB(A) | Full-load condition: 85dB(A)
The test is based on the dynamic test conditions of GB/T 25615 and requires a sound level meter to be used to measure at a distance of 750mm from the center of the driver's seat.
Implementation Key Points
- Test site preparation:Concrete test bench flatness ≤3mm/m², slope ≤0.5%
- Instrument calibration:All measuring equipment should meet the accuracy requirements of GB/T 21153
- Typical test process:
1. Idle running test (Chapter 24) → 2. Fixed-position test (Chapter 5) → 3. Operation performance test (Chapter 22) → 4. Reliability test (Chapter 27)
Technology Evolution Analysis
This standard has been revised four times from 1987 to 1996 to 2008 to 2018, mainly reflecting:
- Environmental protection requirements have been upgraded: new exhaust pollutants (Chapter 13) and refrigerant (Chapter 15) detection
- Safety specification enhancement: TOPS/ROPS protection structure test is a separate chapter (Chapter 20)
- Test digitization: Appendix B record table fields are optimized to facilitate electronic processing
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