Recently, Quanzhou LED industry began to work on the development of Quanzhou LED local quality standard system.
The testing center is open and free of charge. In the daily production process of LED production enterprises, the detection of indicators such as light distribution, color and safety is indispensable. Previously, due to the low detection capability of local enterprises, the quality of LED products of many small enterprises was difficult to guarantee. It is understood that the current local enterprises to detect LED-related products, most need to go to Xiamen's national LED application product quality supervision and inspection center, and even further testing centers, a variety of testing minimum of one or two thousand yuan, usually also queued for testing, testing A product takes about half a month or so; in Quanzhou, the Quanzhou Optoelectronic Technology Research Institute is limited to 8 shareholder units.
In response to this situation, the reporter recently learned from Quanzhou Optoelectronic Technology Research Institute that in addition to ensuring the needs of shareholders, the Optoelectronic Technology Research Center will open to local LED companies and provide free testing services for enterprises in need. At present, the testing center of the Institute of Optoelectronic Technology has conducted product light distribution testing for more than 20 companies and issued more than 100 test reports. In addition to LED manufacturing companies, there are also some companies that plan to carry out energy-saving retrofits for LED lights. They also choose to retrofit products by testing a variety of LED-like lamps. Recently, Quanzhou LED industry began to work on the development of Quanzhou LED local quality standard system.
The testing center is open and free of charge. In the daily production process of LED production enterprises, the detection of indicators such as light distribution, color and safety is indispensable. Previously, due to the low detection capability of local enterprises, the quality of LED products of many small enterprises was difficult to guarantee. It is understood that the current local enterprises to detect LED-related products, most need to go to Xiamen's national LED application product quality supervision and inspection center, and even further testing centers, a variety of testing minimum of one or two thousand yuan, usually also queued for testing, testing A product takes about half a month or so; in Quanzhou, the Quanzhou Optoelectronic Technology Research Institute is limited to 8 shareholder units.
In response to this situation, the reporter recently learned from Quanzhou Optoelectronic Technology Research Institute that in addition to ensuring the needs of shareholders, the Optoelectronic Technology Research Center will open to local LED companies and provide free testing services for enterprises in need. At present, the testing center of the Institute of Optoelectronic Technology has conducted product light distribution testing for more than 20 companies and issued more than 100 test reports. In addition to LED manufacturing companies, there are also some companies that plan to carry out energy-saving retrofits for LED lights. They also choose to retrofit products by testing a variety of LED-like lamps.
Recently, the institute will purchase new equipment to expand the scope of testing. The staff of the Testing Center of the Photoelectric Technology Research Institute introduced that the testing equipment of the testing center is mainly focused on optical inspection. The newly purchased equipment will focus on the detection of electrical performance and safety performance. The institute will lease the site of the Yucheng Science and Technology Entrepreneurship Service Center for the expansion of the testing center. The newly added equipment will be compared with the level of the national testing organization to ensure the authority and accuracy of the testing results.
Setting regional standards to focus on standard output Due to the lack of uniform LED standards in the country, many regions in China have begun to work or have developed LED product standards applicable to industries in certain regions. Not long ago, a LED company in Jiangxi cooperated with Shenzhen Changyuntong Optoelectronics Co., Ltd. to adopt the Guangdong LED standard and released new technologies and new products for light-emitting LED standard optical components. This is the first time that Guangdong LED standards have been adopted by Jiangxi enterprises.
We mainly produce LED light sources. There is no fixed standard now, as long as the products can be completed according to customer requirements. The person in charge of a LED lighting production company in Quanzhou said that such things are not uncommon in the industry. Although for the LED industry, the state has also taken the lead in formulating some standard specifications, such as "Technical Specifications for Energy Savings and Greenhouse Gas Emission Reduction Evaluation of LED Lighting Projects", "General Technical Conditions for LED Stage Lighting", and "Inspection Procedures for Import and Export Lighting Apparatus" Part 2 : LED modules for general lighting, but it is still difficult to cover multiple projects of LED lighting products.
The development of local LED industry standards to ensure product quality, and even standard output, Quanzhou LED industry has also started this work. It is understood that the LED enterprises registered in Quanzhou City, the relevant corporate standards and less than 80% of the relevant departments to record. Recently, the Institute of Optoelectronics established a standardization research office, and the Quanzhou Standardization Association will work together to develop a Quanzhou LED local quality standard system. The development of standards will help to improve the overall level of the local LED industry, and form a group and regional brand effect, open the product. Other regional markets are of great help.
Recently, the institute will purchase new equipment to expand the scope of testing. The staff of the Testing Center of the Photoelectric Technology Research Institute introduced that the testing equipment of the testing center is mainly focused on optical inspection. The newly purchased equipment will focus on the detection of electrical performance and safety performance. The institute will lease the site of the Yucheng Science and Technology Entrepreneurship Service Center for the expansion of the testing center. The newly added equipment will be compared with the level of the national testing organization to ensure the authority and accuracy of the testing results.
Setting regional standards to focus on standard output Due to the lack of uniform LED standards in the country, many regions in China have begun to work or have developed LED product standards applicable to industries in certain regions. Not long ago, a LED company in Jiangxi cooperated with Shenzhen Changyuntong Optoelectronics Co., Ltd. to adopt the Guangdong LED standard and released new technologies and new products for light-emitting LED standard optical components. This is the first time that Guangdong LED standards have been adopted by Jiangxi enterprises.
We mainly produce LED light sources. There is no fixed standard now, as long as the products can be completed according to customer requirements. The person in charge of a LED lighting production company in Quanzhou said that such things are not uncommon in the industry. Although for the LED industry, the state has also taken the lead in formulating some standard specifications, such as "Technical Specifications for Energy Savings and Greenhouse Gas Emission Reduction Evaluation of LED Lighting Projects", "General Technical Conditions for LED Stage Lighting", and "Inspection Procedures for Import and Export Lighting Apparatus" Part 2 : LED modules for general lighting, but it is still difficult to cover multiple projects of LED lighting products.
The development of local LED industry standards to ensure product quality, and even standard output, Quanzhou LED industry has also started this work. It is understood that the LED enterprises registered in Quanzhou City, the relevant corporate standards and less than 80% of the relevant departments to record. Recently, the Institute of Optoelectronics established a standardization research office, and the Quanzhou Standardization Association will work together to develop a Quanzhou LED local quality standard system. The development of standards will help to improve the overall level of the local LED industry, and form a group and regional brand effect, open the product. Other regional markets are of great help.
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 |
Spherical Roller Bearing
Spherical Roller Bearing,One Row Spherical Roller Bearing,Two Row Spherical Roller Bearing
Xibei Bearing Co.,Ltd. , http://www.nxzjck.com