PRODUCT
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Deep Groove Ball Bearing
- Deep Groove Ball Bearing 6000 Series
- Full Complement Deep Groove Ball Bearing 6000-V Series
- Flanged Deep Groove Ball Bearing F6000 Series
- Deep Groove Ball Bearing 6200 Series
- Deep Groove Ball Bearing 6200NR Series
- Deep Groove Ball Bearing 6300 Series
- Deep Groove Ball Bearing 6300NR Series
- Deep Groove Ball Bearing 6400 Series
- Deep Groove Ball Bearing 6000NR Series
- Deep Groove Ball Bearing 6700 Series
- Flanged Deep Groove Ball Bearing F6700 Series
- Deep Groove Ball Bearing 6800 Series
- Full Complement Deep Groove Ball Bearing 6800-V Series
- Flanged Deep Groove Ball Bearing F6800 Series
- Deep Groove Ball Bearing 6900 Series
- Full Complement Deep Groove Ball Bearing 6900-V Series
- Flanged Deep Groove Ball Bearing F6900 Series
- Deep Groove Ball Bearing 62200 Series
- Deep Groove Ball Bearing 62300 Series
- Deep Groove Ball Bearing 63000 Series
- Deep Groove Ball Bearing 63800 Series
- Full Complement Deep Groove Ball Bearing 63800-V Series
- Deep Groove Ball Bearing 16000 Series
- Double Row Deep Groove Ball Bearing 4200 Series
- Double Row Deep Groove Ball Bearing 4300 Series
- Deep Groove Ball Bearing Inch R Series
- Deep Groove Ball Bearing Inch RMS Series
- Miniature Deep Groove Ball Bearing
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Spherical Roller Bearings
- Spherical Roller Bearing 21300 Series
- Spherical Roller Bearing 22200 Series
- Spherical Roller Bearing 22300 Series
- Spherical Roller Bearing 23000 Series
- Spherical Roller Bearing 23100 Series
- Spherical Roller Bearing 23200 Series
- Spherical Roller Bearing 23900 Series
- Spherical Roller Bearing 24000 Serie
- Spherical Roller Bearing 24100 Series
- Split Style Spherical Roller Bearing
- Thrust Roller Bearing
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Joint Bearing
- Radial Spherical Joint Plain Bearing GE...E
- Radial Spherical Joint Plain Bearing GE...ES
- Radial Spherical Joint Plain Bearing GE...ES-2RS
- Rod End Joint Bearing PHS/PHSB
- Rod End Joint Bearing GE...C
- Rod End Joint Bearing SI...TK
- Rod End Joint Bearing NHS
- Rod End Joint Bearing GIR...DO
- Rod End Joint Bearing GIR...C
- Rod End Joint Bearing GIR...UK
- Rod End Joint Bearing SQZ...RS
- Rod End Joint Bearing SA...T/K
- Rod End Joint Bearing POS/POSB
- Rod End Joint Bearing NOS
- Rod End Joint Bearing GAR...DO
- Rod End Joint Bearing GAR...C
- Rod End Joint Bearing GAR...UK
- Rod End Joint Bearing SQ...RS
- Rod End Joint Bearing SA...E
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Angular Contact Ball Bearings
- Single Row Angular Contact Ball Bearing 7000 series
- Single Row Angular Contact Ball Bearing 7200 series
- Single Row Angular Contact Ball Bearing 7300 series
- Single Row Angular Contact Ball Bearing 7900 series
- Double Row Angular Contact Ball Bearing 3200 Series
- Double Row Angular Contact Ball Bearing 3300 Series
- Qj2 Series Four Point Angular Contact Ball Bearing
- Qj3 Series Four Point Angular Contact Ball Bearing
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Tapered Roller Bearings
- Single Row Tapered Roller Bearing 30200 Series
- Single Row Tapered Roller Bearing 30300 Series
- Single Row Tapered Roller Bearing 31300 Series
- Single Row Tapered Roller Bearing 32000 Series
- Single Row Tapered Roller Bearing 32200 Series
- Single Row Tapered Roller Bearing 32300 Series
- Single Row Tapered Roller Bearing 33000 Series
- Single Row Tapered Roller Bearing 33100 Series
- Single Row Tapered Roller Bearing 33200 Series
- Single Row Tapered Roller Bearing Inch Series
- Double Row Tapered Roller Bearing 350000 Series
- Double Row Tapered Roller Bearing Inch Series
- Four-row Tapered Roller Bearing 380000 Series
- Four-row Tapered Roller Bearing Inch Series
-
Needle Roller Bearing
- HK Style Standard Needle Roller Bearing
- HF Style Standard Needle Roller Bearing
- F Style Standard Needle Roller Bearing
- K Style Standard Needle Roller Bearing
- SCE Style Standard Needle Roller Bearing
- CF Style Standard Needle Roller Bearing
- HFL Style Standard Needle Roller Bearing
- TA Style Standard Needle Roller Bearing
- NATR Style Standard Needle Roller Bearing
- BK Style Standard Needle Roller Bearing
- NA Style Standard Needle Roller Bearing
- NK Style Standard Needle Roller Bearing without Inner Ring
- NKI Style Standard Needle Roller Bearing with Inner Ring
- NKIS Style Standard Needle Roller Bearing with Inner Ring
- NKS Style Standard Needle Roller Bearing without Inner Ring
- RNA Standard Needle Roller Bearing without Inner Ring
- Inch-Style Needle Roller Bearing
- MR Series Heavy Duty Needle Roller Bearing
- Self-Aligning Ball Bearings
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Cylindrical Roller Bearings
- Cylindrical Roller Bearing N Series
- Cylindrical Roller Bearing NU Series
- Cylindrical Roller Bearing NJ Series
- Cylindrical Roller Bearing NF Series
- Cylindrical Roller Bearing NUP Series
- Cylindrical Roller Bearing NFP Series
- Cylindrical Roller Bearing NH(NJ+HJ) Series
- Cylindrical Roller Bearing NN Series
- Cylindrical Roller Bearing NNU Series
- Cylindrical Roller Bearing NNF Series
- Cylindrical Roller Bearing FC Series
- Cylindrical Roller Bearing FCD Series
- SL Sheave Wheel Series Cylindrical Roller Bearing
- Thrust Ball Bearing
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Pillow Block Bearing
- Pillow Block Bearing UC Inserts
- Pillow Block Bearing UK Inserts
- Pillow Block Bearing SB Inserts
- Pillow Block Bearing SA Inserts
- Pillow Block Bearing CS Inserts
- Pillow Block Bearing UCP
- Pillow Block Bearing UKP
- Pillow Block Bearing SAP
- Pillow Block Bearing SBP
- Pillow Block Bearing UCPA
- Pillow Block Bearing UKPA
- Pillow Block Bearing UCPH
- Pillow Block Bearing UKPH
- Pillow Block Bearing UCF
- Pillow Block Bearing UKF
- Pillow Block Bearing UCFL
- Pillow Block Bearing UKFL
- Pillow Block Bearing UCFC
- Pillow Block Bearing UKFC
- Pillow Block Bearing UCFA
- Pillow Block Bearing UKFA
- Pillow Block Bearing UCFB
- Pillow Block Bearing UKFB
- Pillow Block Bearing UCT
- Pillow Block Bearing UKT
- Pillow Block Bearing UCC
- Pillow Block Bearing SBPP
- Pillow Block Bearing SAPP
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Linear Bearing
- Standard Linear Bearing LM Series
- Adjustable Type Linear Bearing LM-AJ Series
- Open Type Linear Bearing LM--OP Series
- Lengthened Type Linear Bearing LM-L Series
- Standard Linear Bearing LME Series
- Adjustable Type Linear Bearing LME-AJ Series
- Open Type Linear Bearing LME-OP Series
- Lengthened Type Linear Bearing LME--L Series
- Standard Linear Bearing LMB Series
- Adjustable Type Linear Bearing LMB--AJ Series
- Open Type Linear Bearing LMB--OP Series
- Lengthened Type Linear Bearing LMB--L Series
- Round Flange Linear Bearing LMF Series
- Square Flange Type Linear Bearing LMK Series
- Oval Flange Linear Bearing LMH Series
- Round Flange Linear Bearing LMF--L Series
- Square Flange Type Linear Bearing LMK-L Series
- Oval Flange Linear Bearing LMH-L Series
- Pilot Flange Linear Bearing LMFP Series
- Pilot Flange Linear Bearing LMKP Series
- Pilot Flange Linear Bearing LMHP Series
- Pilot Flange Linear Bearing LMFP-L Series
- Pilot Flange Linear Bearing LMKP-L Series
- Pilot Flange Linear Bearing LMHP-L Series
- Middle Flanged Linear Bearing LMFC-L Series
- Middle Flanged Linear Bearing LMKC-L Series
- Middle Flanged Linear Bearing LMHC-L Series
- Round Flange Linear Bearing LMEF Series
- Square Flange Type Linear Bearing LMEK Series
- Round Flange Linear Bearing LMEF-L Series
- Square Flange Type Linear Bearing LMEK-L Series
- Middle Flanged Linear Bearing LMEKC-L Series
- Middle Flanged Linear Bearing LMEFC-L Series
- Round Flange Linear Bearing LMBF Series
- Square Flange Type Linear Bearing LMBK Series
- Round Flange Linear Bearing LMBF-L Series
- Compact Ball Bushing KH Series
- SC UU Slide Block Unit Series
- SC LUU Linear Case Unit Series
- SC VUU Linear Pillow Block Unit Series
- SBR UU Support Rail Unit Series
- SBR LUU Support Rail Unit Series
- TBR UU Support Rail Unit Series
- SCE UU Slide Block Unit Series
- SCE LUU Linear Case Unit Series
- SCE VUU Linear Pillow Block Unit Series
- Vertical Shaft Support SK Series
- Horizontal Shaft Support SHF Series
- Sleeve Bearing
- Other Bearings
The development history of magnetic suspension bearings
by:JNSN
2022-08-12
In recent years, with the continuous development of magnetic levitation-related disciplines such as electromagnetics, electronics, control theory, mechanics, rotor dynamics, materials science, and computer science, maglev-related products and applications have continued to expand, and it can be said that it has entered an explosive period. Taking the hyperloop as an example, there are various technical routes, such as Japan's low-temperature superconducting (such as MLX01, L0 and other maglev trains), China's high-temperature superconducting (such as the vacuum pipeline high-temperature superconducting maglev test system 'Superconductor' researched by Southwest Jiaotong University. -Maglev'), Germany's electromagnetic force (TR01-TR09 series of maglev trains, etc.), and Musk's vacuum high-speed rail plan (Hyperloop system), etc. Maglev has become an underlying innovation that can directly or indirectly drive a large number of related industries. 'Magnetic bearing is a new type of high-performance bearing that uses magnetic force to suspend the shaft and load in space without mechanical friction and without lubrication.' As a new modern support technology, magnetic suspension bearing, we simply sort out the development. 1. History of Development In 1842, Eamshaw of Cambridge University, UK, proposed the concept of magnetic levitation and proved that it is impossible for a ferromagnet to be supported by another permanent magnet and maintain free and stable suspension in all six degrees of freedom. At least one degree of freedom must be eliminated by mechanical or other constraints. After nearly a century of research and other scientific and technological developments, in 1937, Kemper applied for a patent on levitation bearings, which constituted the leading idea for subsequent research on maglev trains and maglev bearings. In 1938, Kemper used an inductive sensor and a tube amplifier to make a controllable electromagnet, and successfully achieved a stable magnetic levitation on an object weighing 2 100 N, which was the prototype of a maglev train. During the same period, Beams and Holmes of the University of Virginia in the United States used electromagnetic levitation technology to suspend a small steel ball, and measured the strength of the test material by the centrifugal force that the steel ball could withstand when rotating at a high speed. The rotation speed is as high as 1.8x106 r/min, which may be the earliest application example of using magnetic levitation technology to support rotating objects in the world. With the rapid development of modern control theory and electronic technology, from the early 1960s, the international magnetic suspension bearing was the first to be applied in space technology. The Draper Laboratory in the United States first successfully used magnetic suspension bearings in space guidance and inertia wheels. In 1969, the French military scientific research laboratory began to study the magnetic suspension bearing, and in 1972, the first magnetic suspension bearing was used for the support of the satellite guide wheel. After the 1960s, the United States, Japan, France, the former Soviet Union and other countries began to carry out research work on active maglev bearings. The work in this period laid a theoretical foundation for future practice. After the 1970s, with the emergence of large-scale integrated circuits, new permanent magnet materials and the urgent need for scientific and technological development, magnetic levitation technology has developed rapidly and has been applied in many fields, such as various high-speed rotating machinery in the machinery industry, including various Machine tools, turbomolecular pumps, high-speed centrifuges, turbogenerators, liquid helium pumps, etc. In 1977, the Lincoln Laboratory of the Massachusetts Institute of Technology designed and manufactured a magnetic bearing for the momentum or energy storage flywheel of a spacecraft. In 1976, the S2M company jointly invested by the French SEP company and the Swedish SKF bearing company, launched the B20/500 maglev spindle system for the first time at the Hanover European International Machine Tool Exhibition in 1981, and carried out a field test at 35 000 r/min. Drilling and milling performances, the company also exhibited a series of magnetic bearings and their supported machine tool spindle components at the 5th European Machine Tool Exhibition in 1983. In 1983, a vacuum pump with magnetic bearing was installed in the European space capsule of the American space shuttle. In 1986, Japan conducted a space test of a maglev flywheel on the H-1 rocket. In 1994, Meeks and others designed two generations of magnetic suspension bearings for aero-engines. Around 1997, the Draper Laboratory in the United States reported a series of research results on high-temperature magnetic suspension bearings for aero-engines, and successfully developed a magnetic suspension bearing system that can work at a high temperature of 510 °C. Experiments were successfully carried out on the model rotor of the engine. 2. Domestic research situation Domestic research on maglev bearing technology began in the early 1980s.
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