Wireless moisture and drought management system and planned irrigation
Water is the most precious resource in human life and production. Everything grows without water. This is reflected in the most vivid expression in agricultural production. The level of moisture in the soil determines the state of crop growth to some extent, such as its health status, output quality, and maximum yield. Therefore, the use of wireless public opinion and drought management systems to carry out monitoring of soil moisture content is of great significance for improving the production level of modern agriculture. It also has a very important role and influence on the most important measure of agriculture, planned irrigation. We know that the traditional irrigation method is mainly flood irrigation, which not only wastes water resources, but also the irrigation quality of the crop is not high. In order to plan irrigation, it is necessary to let people know more through scientific detection instruments such as wireless public opinion and drought management systems. The state of moisture in soil obtains accurate data results and scientific analysis and integration from the perspective of data, so that in production, especially in irrigation operations, it is possible to make better and more precise measures to increase the current level of irrigation in agriculture. To achieve the efficient use of water, avoid the waste of water resources, and achieve the goal of increasing agricultural efficiency. In agricultural production, each of the agricultural environmental factors has an optimum range suitable for crop growth, and accurately monitoring and controlling the crop growth environment is the basis of precision agriculture. The Wireless Public Opinion and Drought Management System is a professional instrument to monitor the soil moisture content. Using the wireless moisture and drought management system to collect and process agricultural environment and plant physiological data can help workers to grow according to these specific soil conditions and crop growth. The state's empirical values ​​have resulted in accurate irrigation plans that have helped agricultural production significantly reduce the use of water, fertilizers, medicines, and other resources and manpower, and have significantly increased agricultural production efficiency and economic efficiency. At present, the development of precision agriculture has received widespread attention from the whole society, and planned irrigation is an important part of it. In modern agricultural production, it is being gradually realized through the promotion and application of wireless public opinion and drought management systems, and this kind of low-cost agriculture The solution not only improves the level of modern agriculture's resistance to disasters, ensures the safety of food production, but also provides a reliable guarantee for the large-scale precision and standardization of the agricultural industry, and has facilitated the development of precision agriculture.
A Spherical bearing
is composed by an inner ring with a double raceway and an outer ring with
spherical surface, the outer raceway center is in accord with shaft center; all
having self-aligning function, which can compensate the mounting error between
the shaft and bearing seat and the outer ring inclination caused by shaft
deflection. They can carry large radial load and could also support any directional
axial load but not pure axial load. In particular, they are suitable for the
applications with heavy load or vibration.
Structures
20000Ctype is adopting spherical symmetrical rollers, no fixed
ribs on the inner ring; there are also two rows of independent solid cages.
This type of bearings is especially suitable for the applications with high
speed rotation.
20000CA are symmetric spherical
rollers, there are fixed ribs on the center of inner ring, the solid cage is
integrated. This type of bearings is widely applied and especially for
applications with heavy load.
Cage material
Machined
brass cage or pressed cage of steel sheet.
Permissible tilt angle
See
Table 1.
Tolerance and clearance
The tolerance of spherical roller
bearings is class 0 and class 6. The tolerance value is available in section
Rolling Bearing Tolerance.
Radial clearance of Spherical Roller Bearing is listed in Table 2 and 3.
Dynamic equivalent radial
load
when Fa/Fr≤e
Pr=Fr+Y1Fa
when
Fa/Fr>e Pr=0.67Fr+Y2Fa
e,
Y1,Y2 factors can be found in
the table of bearing dimension
Dynamic equivalent radial
load
P0r=Fr+Y0Fa
Y0 factors can be found in
the table of bearing dimension
Table 1 The permissible
angular misalignment
Bearing series
30
40
31
41
22
32
13
23
The
permissible angular misalignment
≤
1.5°
2°
1.5°
2.5°
1.5°
2.5°
1°
2°
Table 2 Radial
clearance of spherical roller bearing
with cylindrical bore
μm
Nominal bore diameter d
mm
C2
clearance
Standard
clearance
C3
clearance
C4
clearance
C5
clearance
Over
To
Min
Max
Min
Max
Over
To
Min
Max
Min
Max
14
18
24
30
40
50
65
80
100
120
140
160
180
200
225
250
280
315
355
400
450
500
560
630
710
800
900
18
24
30
40
50
65
80
100
120
140
160
180
200
225
250
280
315
355
400
450
500
560
630
710
800
900
1000
10
10
15
15
20
20
30
35
40
50
60
65
70
80
90
100
110
120
130
140
140
150
170
190
210
230
260
20
20
25
30
35
40
50
60
75
95
110
120
130
140
150
170
190
200
220
240
280
310
350
390
430
480
20
20
25
30
35
40
50
60
75
95
110
120
130
140
150
170
190
200
220
240
260
280
310
350
390
430
480
35
35
40
45
55
65
80
100
120
145
170
180
200
220
240
260
280
310
340
370
410
440
480
530
580
650
710
35
35
40
45
55
65
80
100
120
145
170
180
200
220
240
260
280
310
370
410
440
480
530
580
650
710
45
45
55
60
75
90
110
135
160
190
220
240
260
290
320
350
370
410
450
500
550
600
650
700
770
860
930
45
45
55
60
75
90
110
135
160
190
220
240
260
290
320
350
370
410
450
500
550
600
650
700
770
860
930
60
60
75
80
100
120
145
180
210
240
280
310
340
380
420
460
500
550
600
660
720
780
850
920
1010
1120
1220
60
60
75
80
100
120
145
180
210
240
280
310
340
380
420
460
500
550
600
660
720
780
850
920
1010
1120
1220
75
75
95
100
125
150
180
225
260
300
350
390
430
470
520
570
630
690
750
820
900
1000
1100
1190
1300
1440
1570
Table 3 Radial clearance of spherical roller bearing with tapered bore
μm
Nominal bore diameter d
mm
C2
clearance
Standard
clearance
C3
clearance
C4
clearance
C5
clearance
Over
To
Min
Max
Min
Max
Over
To
Min
Max
Min
Max
18
24
30
40
50
65
80
100
120
140
160
180
200
225
250
280
315
355
400
450
500
560
630
710
800
900
24
30
40
50
65
80
100
120
140
160
180
200
225
250
280
315
355
400
450
500
560
630
710
800
900
1000
15
20
25
30
40
50
55
65
80
90
100
110
120
140
150
170
190
210
230
260
290
320
350
390
440
490
25
30
35
45
55
70
80
100
120
130
140
160
180
200
220
240
270
300
330
410
460
510
570
640
710
25
30
35
45
55
70
80
100
120
130
140
160
180
200
220
240
270
300
330
370
410
460
510
570
640
710
35
40
50
60
75
95
110
135
160
180
200
220
250
270
300
330
360
440
490
540
600
670
750
840
930
35
40
50
60
75
95
110
135
160
180
200
220
250
270
300
330
360
400
440
490
540
600
670
750
840
930
45
55
65
80
95
120
140
170
200
230
260
290
320
350
390
430
470
520
570
630
680
760
850
960
1070
1190
45
55
65
80
95
120
140
170
200
230
260
290
320
350
390
430
470
520
570
630
680
760
850
960
1070
1190
60
75
85
100
120
150
180
220
260
300
340
370
410
450
490
540
590
650
720
790
870
980
1090
1220
1370
1520
60
75
85
100
120
150
180
220
260
300
340
370
410
450
490
540
590
650
720
790
870
980
1090
1220
1370
1520
75
95
105
130
160
200
230
280
330
380
430
470
520
570
620
680
740
820
910
1000
1100
1230
1360
1500
1690
1860
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