JB/T 7884.2-1999 This standard is a revision of JB/T 7884-95 "Test Methods for Sawtooth Cotton Gin". The main technical content changes are as follows: - The noise measurement method has been adjusted; - The bearing temperature rise measurement method has been added. This standard specifies the test purpose, test content, test method, etc. of sawtooth cotton gin. This standard is applicable to the performance test and production test of sawtooth cotton gin. This standard was first issued in 1975 as NJ 113-75, first revised to GB 5672-85 on December 3, 1985, and adjusted to JB/T 7884-95 in April 1996. JB/T 7884.2-1999 Test Methods for Sawtooth Cotton Gin JB/T7884.2-1999 Standard Download Decompression Password: www.bzxz.net

JB/T7884.2-1999
This standard is a revision of IB/T7884--95 "Test Methods for Sawtooth Cotton Ginning". The main technical contents of this standard are as follows:
1. The noise measurement method is adjusted.
2. The bearing temperature rise measurement method is added. This standard replaces JB/T7884-95 from the date of implementation. Compared with JBT7884-95, this standard is proposed and managed by the National Technical Committee for Agricultural Machinery Standardization. The responsible drafting unit of this standard: Handan Cotton Machinery Factory. The main drafters of this standard: Gao Li, Yang Guoqing, Li Futang. This standard was first issued in 1975 as NJ113--75, revised for the first time in 1985, and adjusted to JB/T7884-955 in 1996. 4. 1. 2
Shift hourly productivity
Where: E. Shift hourly productivity, kg/h; T, shift time. h.
JB/T7884.2-1999
5.4.2 The power consumption per 100 grams of lint is calculated according to formula (3). 5.4.3 Effectiveness
Where: K—effectiveness, %;
TT. Working time, h;
T——fault elimination time, h.
Test report
The main contents are as follows:
a) Test purpose, time, location and test conditions; b) Introduction to the prototype (including structure, main parameters and main working principle); c) Test results and their analysis, evaluation of the prototype; d) The report should be accompanied by necessary data tables, figures, special reports, etc.; e) Test responsible unit and participants.
Table 1 Adjustment position record table
Machine name:
Test date:
Length of the hair extending into the aluminum sheet
Distance between the air outlet and the saw blade
Manufacturing unit:
Machine number:
Height of the saw blade extending out of the auxiliary strip (1. In the radial direction of 100mm below the working point) Distance between the aluminum sheet and the windshield
Distance between the hair and the rear windshield
Distance between the tip of the staggered blade and the debris removal blade
Number of teeth of the staggered blade in the assembly box||tt ||Mistaken teeth entering ribs 1. Pressure angle when making points
Test person in charge:
Recorder:
Machine name and model:
Test date:
Number of measurements
Test person in charge:
Machine name and model:
Test date:
Starting time
Test person in charge:
Machine name and model:
Test date:
Test person in charge:www.bzxz.net
JB/T 7884.2-1999
Table 3 Record of each axis speed, power and noise Manufacturing unit:
Machine number:
Speed ​​of each axis
Recorder:
Table 4 Record of test time and power consumption
Manufacturer:
Machine number:
Time h
End time
Pure T. Operation time
Record Recorder:
At the beginning
Electric meter reading
Power consumption·kW·h
At the end
Electric meter reading
Table 5 Recording table of weight of seed cotton, lint cotton, etc.
Machine number:
Seed cotton kg
Lint cotton kg
Recorder:
Infertile seeds kg
Actual power consumption
Discharge debris
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