GB/T 8094-2023 Equipment for harvesting—Combine harvesters—Determination and designation of grain tank capacity and unloading device performance (English Version)
GB/T 8094-2023 Equipment for harvesting - Combine harvesters - Determination and designation of grain tank capacity and unloading device performance
1 Scope
This document specifies a preferred method for determining and designating the capacity and unloading rate of combine harvester grain tanks and unloading systems.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 712 Cereals and cereal products - Determination of moisture content - Reference method
ISO 4254-7 Agricultural machinery - Safety - Part 7: Combine harvesters, forage harvesters, cotton harvesters and sugar cane harvesters
Note: GB/T 10395.7-2006, Tractors and machinery for agriculture and forestry - Technical means for ensuring safety - Part 7: Combine harvesters, forage and cotton harvesters (ISO 4254-7:1995, MOD)
ISO 66891) Equipment for harvesting - Combine harvesters and functional components - Vocabulary
Note: GB/T 6979.1-2005, Equipment for harvesting - Combines and functional components - Part 1: Vocabulary (ISO 6689-1:1997, MOD)
ISO 7970 Wheat (Triticum aestivum L.) - Specification
ISO 7971-2 Cereals - Determination of bulk density, called mass per hectolitre - Part 2: Method of traceability for measuring instruments through reference to the international standard instrument
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6689 and ISO 4254-7 apply.
4 Test method
4.1 Test machine
4.1.1 The test combine harvester shall be identified as to make, model year, machine identification number, grain-unloading device description, and other pertinent information.
4.1.2 The terminology and methods or measurement defined in ISO 6689 shall be used where applicable.
4.1.3 The combine harvester used for the test shall be equipped with a header typically used to harvest the wheat. The machine configuration shall be documented in the test report.
4.1.4 At the time of the test, the test combine harvester shall be in good working order with all working surfaces free of rust, grease or other impediments to normal operation. A run-in period of minimum 3 grain tank fill‑ and‑ empty cycles is required to ensure this condition on a new combine harvester, or one that has not been used recently.
4.2 Test preparations
4.2.1 During all portions of the test, the combine harvester shall be stationary, placed horizontally on a level surface and running at rated speeds with the feed table (header) and threshing mechanisms engaged. During the unloading portion of the test, the unloading device shall also be engaged at rated speed with the feed table (header) and threshing mechanisms previously engaged.
4.2.2 The wheat used for testing shall have a wet basis moisture content between 10 % and 17 %, measured in accordance with ISO 712, and a maximum impurity level of 3 %, measured in accordance with ISO 7970. The mass per litre of the test wheat should be no less than 0.73 kg/l and no greater than 0.81 kg/l in accordance with ISO 7971-2. A sample of the test wheat shall be taken. The wet basis moisture content, and the impurity content, in percent by mass, shall be determined and recorded. The mass per litre, in kg/l, shall be determined and recorded.
4.2.3 To ensure that the grain tank and unloading device are effectively empty before starting the rating tests, operate the grain-unloading device until the main unloading stream of grain has stopped and then continue to run the grain-unloading device for at least one more minute before stopping.
4.3 Test procedure
4.3.1 Fill the grain tank with the test wheat by means of its own loading system up to, but not beyond, the point of spillage.
4.3.2 Measure the unloading rate using one of the procedures described in 4.3.2.1 or 4.3.2.2.
4.3.2.1 Recommended procedure is to unload the combine and continuously measure weight vs time at a minimum frequency of 5 Hz. Commence unloading the test wheat from the combine harvester grain tank using the combine’s grain-unloading device operating at its rated speed into a suitable collection area for weighing the wheat, at the same time recording the weight vs time. The starting time is the moment when the unloading switch or lever is activated by the operator. Continue unloading for 30 s after the flow of wheat stops to ensure sufficient data collection. The point at which the grain tank is effectively empty will be calculated as described in 5.2.1.
4.3.2.2 Alternate procedure is to commence unloading the test wheat from the combine harvester grain tank using the combine’s grain-unloading device operating at its rated speed into a suitable collection area for weighing the wheat, at the same time noting the starting time. The starting time is the moment when the unloading switch or lever is activated by the operator. Five seconds after the start of full flow from the grain-unloading device, divert the wheat into a second suitable collection area. After a further 30 s, divert the remaining wheat being unloaded into the first collection area until the flow of wheat stops, when the grain tank is considered to be effectively empty. Weigh and document the mass of test wheat collected in the first and second collection areas. Document the total time.
Standard
GB/T 8094-2023 Equipment for harvesting—Combine harvesters—Determination and designation of grain tank capacity and unloading device performance (English Version)
Standard No.
GB/T 8094-2023
Status
valid
Language
English
File Format
PDF
Word Count
4000 words
Price(USD)
120.0
Implemented on
2023-12-1
Delivery
via email in 1~3 business day
Detail of GB/T 8094-2023
Standard No.
GB/T 8094-2023
English Name
Equipment for harvesting—Combine harvesters—Determination and designation of grain tank capacity and unloading device performance
GB/T 8094-2023 Equipment for harvesting - Combine harvesters - Determination and designation of grain tank capacity and unloading device performance
1 Scope
This document specifies a preferred method for determining and designating the capacity and unloading rate of combine harvester grain tanks and unloading systems.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 712 Cereals and cereal products - Determination of moisture content - Reference method
ISO 4254-7 Agricultural machinery - Safety - Part 7: Combine harvesters, forage harvesters, cotton harvesters and sugar cane harvesters
Note: GB/T 10395.7-2006, Tractors and machinery for agriculture and forestry - Technical means for ensuring safety - Part 7: Combine harvesters, forage and cotton harvesters (ISO 4254-7:1995, MOD)
ISO 66891) Equipment for harvesting - Combine harvesters and functional components - Vocabulary
Note: GB/T 6979.1-2005, Equipment for harvesting - Combines and functional components - Part 1: Vocabulary (ISO 6689-1:1997, MOD)
ISO 7970 Wheat (Triticum aestivum L.) - Specification
ISO 7971-2 Cereals - Determination of bulk density, called mass per hectolitre - Part 2: Method of traceability for measuring instruments through reference to the international standard instrument
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6689 and ISO 4254-7 apply.
4 Test method
4.1 Test machine
4.1.1 The test combine harvester shall be identified as to make, model year, machine identification number, grain-unloading device description, and other pertinent information.
4.1.2 The terminology and methods or measurement defined in ISO 6689 shall be used where applicable.
4.1.3 The combine harvester used for the test shall be equipped with a header typically used to harvest the wheat. The machine configuration shall be documented in the test report.
4.1.4 At the time of the test, the test combine harvester shall be in good working order with all working surfaces free of rust, grease or other impediments to normal operation. A run-in period of minimum 3 grain tank fill‑ and‑ empty cycles is required to ensure this condition on a new combine harvester, or one that has not been used recently.
4.2 Test preparations
4.2.1 During all portions of the test, the combine harvester shall be stationary, placed horizontally on a level surface and running at rated speeds with the feed table (header) and threshing mechanisms engaged. During the unloading portion of the test, the unloading device shall also be engaged at rated speed with the feed table (header) and threshing mechanisms previously engaged.
4.2.2 The wheat used for testing shall have a wet basis moisture content between 10 % and 17 %, measured in accordance with ISO 712, and a maximum impurity level of 3 %, measured in accordance with ISO 7970. The mass per litre of the test wheat should be no less than 0.73 kg/l and no greater than 0.81 kg/l in accordance with ISO 7971-2. A sample of the test wheat shall be taken. The wet basis moisture content, and the impurity content, in percent by mass, shall be determined and recorded. The mass per litre, in kg/l, shall be determined and recorded.
4.2.3 To ensure that the grain tank and unloading device are effectively empty before starting the rating tests, operate the grain-unloading device until the main unloading stream of grain has stopped and then continue to run the grain-unloading device for at least one more minute before stopping.
4.3 Test procedure
4.3.1 Fill the grain tank with the test wheat by means of its own loading system up to, but not beyond, the point of spillage.
4.3.2 Measure the unloading rate using one of the procedures described in 4.3.2.1 or 4.3.2.2.
4.3.2.1 Recommended procedure is to unload the combine and continuously measure weight vs time at a minimum frequency of 5 Hz. Commence unloading the test wheat from the combine harvester grain tank using the combine’s grain-unloading device operating at its rated speed into a suitable collection area for weighing the wheat, at the same time recording the weight vs time. The starting time is the moment when the unloading switch or lever is activated by the operator. Continue unloading for 30 s after the flow of wheat stops to ensure sufficient data collection. The point at which the grain tank is effectively empty will be calculated as described in 5.2.1.
4.3.2.2 Alternate procedure is to commence unloading the test wheat from the combine harvester grain tank using the combine’s grain-unloading device operating at its rated speed into a suitable collection area for weighing the wheat, at the same time noting the starting time. The starting time is the moment when the unloading switch or lever is activated by the operator. Five seconds after the start of full flow from the grain-unloading device, divert the wheat into a second suitable collection area. After a further 30 s, divert the remaining wheat being unloaded into the first collection area until the flow of wheat stops, when the grain tank is considered to be effectively empty. Weigh and document the mass of test wheat collected in the first and second collection areas. Document the total time.
