GB/T 20790-2024 in English
VALIDHead-feed combine harvester—Technical requirements
- Issued on:2024-04-25
- Implemented on:2024-11-01
- File Format:PDF
- Delivery:Within 1 day
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| Standard No: | GB/T 20790-2024 |
| Document status: | VALID |
| Title in English: | Head-feed combine harvester—Technical requirements |
| Title in Chinese: | 半喂入联合收割机 技术条件 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Within 1 day |
| Issued on: | 2024-04-25 |
| Implemented on: | 2024-11-01 |
| Superseding: |
GB/T 20790-2006 Technical requirements for head-feed combine harvester
|
| Professional Classification: | GB-National Standard |
| Related Keywords: | head-feed combine harvester technical requirements introduction in-depth interpretation
semi-feed combine harvester emission requirements specific requirements technical indicators |
| Related Topics: | Semi-dry conditions
online technology Income Distribution Linkage conditions Hello GBT20790 GB/T 20790-2006 Wire feeder Combine harvester technical conditions Combine harvester design |
《GB/T 20790-2024半喂入联合收割机 技术条件》由TC201（全国农业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
In-depth interpretation of GB/T20790-2024 semi-feed combine harvester technical conditions
Background and significance of standard update
GB/T20790-2024, as an important standard in the field of agricultural machinery, replaces the old standard of 2006. This revision focuses on improving the safety, environmental protection and operating efficiency of combine harvesters, reflecting the demand of modern agriculture for efficient, intelligent and green agricultural machinery.
| Standard dimensions | Requirements of the 2006 edition | Updated in the 2024 edition |
|---|---|---|
| Operation performance | Not clearly specified | Introduce productivity indicators, and clarify the upper limits of total loss rate and impurity rate (rice ≤2.3%, wheat ≤2.5%) |
| Emission requirements | No specific requirements | Add GB20891 and HJ1014 standards, and strictly control diesel engine pollutant emissions |
| Reliability indicators | Effectiveness ≥ 90% | Increased to ≥ 95%, with a new requirement of ≥ 80 hours between failures |
Core technical indicators and practical applications
Optimization of rice support performance
The new standard requires that the maximum support angle for forward cutting of fallen rice crops should reach 80°, and 70° for reverse cutting; for forward cutting of wheat should reach 80°, and 45° for reverse cutting. This is achieved by optimizing the design of the rice support device and the response of the speed lever.
Emission control technology
A diesel engine that complies with GB20891 is used, equipped with a particulate filter and a selective catalytic reduction system (SCR) to ensure that pollutant emissions meet China's third and fourth stage standards.
Implementation suggestions and precautions
- Manufacturers need to establish a complete reliability testing system, focusing on testing the cleanliness of diesel engines and hydraulic systems (GB/T14039-2002)
- Users should regularly maintain the equipment according to the instructions, especially the emission system and seals
- It is recommended to use an intelligent monitoring system to monitor key parameters such as engine oil pressure, speed and water temperature in real time
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