Space Bearings - CEROBEAR
←
→
Page content transcription
If your browser does not render page correctly, please read the page content below
Space Bearings
Ball
2
& Roller Bearings for Space Applications
CEROBEAR - the leading manufacturer of ceramic rolling bearings
CEROBEAR GmbH: CERAMIC IN ROLLING BEARINGS
Founded: in 1989
as Spin-off from Fraunhofer Institute of Production Technology
Acquired: by NHBB (a subsidiary of MinebeaMitsumi Aerospace)
on July 1, 2013; operating as independent subsidiary of NHBB
Employees: 150
Based: Herzogenrath, Germany
CEROBEAR Space Bearing Brochure
3
CEROBEAR - a pioneer in rolling “product + service” package for Space Bearings
bearing technology
CEROBEAR is the specialist for custom engineered } High Precision Ball & Roller bearings of All Types available & proven for Space Applications:
bearing solutions combining advanced materials &
} Mechanisms (Dry running and Wet lubricated; Extreme temperature range)
components.
Propulsion Systems (Turbo-Pumps; Media lubricated, Cryogenic, LOX, LH2, Kerosene, RP)
Guidance Systems (Flyweels, Momentum Wheels, Reaction Wheels)
CEROBEAR is also the world leader in the design
and production of the highest quality Si3N4 } All-Metal, Hybrid-Ceramic, and All-Ceramic versions available for Space
ceramic rollers (all kinds of ceramic rollers,
} Both “Heritage” Space materials technology, and “Next Generation” materials available
including tapered and spherical ceramic rollers).
} “Custom-Engineered”, “Build-To-Print”, and System-Integrated” designs proposed upon
request
} Simultaeous “Co-Engineering”
} R&D and Testing capabilities support design, friction/torque, pre-load, run-in, and all data
gathering to support delivery
} Products made-to-order
ISO 9100 ISO 9001 ISO 14001
} Low Minimum Quantity Requirements, and Short Delivery Time compared to competition
ISO 45001 ISO 5001
Ball
4
& Roller Bearings for Space Applications
CEROBEAR Examples of Flight Critical Bearings
} BEPI COLOMBO (ESA, JAXA) | Launched Oct 2018
} MAVEN (NASA) | In Space since 2013
} SWARM (ESA, CNES) |In Space since 2013
} MetOp-C (ESA) | In Space since 2018
} ASTRO H / XHARM (ESA, JAXA)| launched in 2016;
} PRISMA (ASI, ESA) | In space since March 2019
} SENTINEL 1 , 2 (ESA) | In space since 2014
} SPACE SHUTTLE (NASA) | 38 successful missions before program ended
} MARS 2020 - Perseverance (NASA)
Landed on Mars February 18th 2021 and now operational
} EUROPA (Various Customers) | In Ground Testing Now
} DART (Various Customers) | In Ground Testing Now
} PACE (Various Customers) | In Ground Testing Now
} ORION (Various Customers) | In Ground Testing Now
} VIPER – Moon Mission (NASA), In Ground Testing Now
Image Credit:
} And more……………….. Courtesy NASA/JPL-Caltech
iStock
CEROBEAR Space Bearing Brochure
5
How to get a Bearing in Space
Bearing for space are characterized by typical conditions and requirements such as high launch Typical Deliverables (optional):
loads and relatively moderate operating load conditions. The bearing performance and lifetime • Bearing Design Description
(including load and stress analysis)
is a combination of environmental conditions (vacuum), loads, bearings materials and design.
• Sales Drawing with all relevant
Despite existing technical solutions with extensive space heritage customers expect higher design features
service life at lower operating costs. CEROBEAR supports customers in the development and • Compliance Statement
(based on customer specificiation)
design of space bearings by assessing operating conditions and calculating resulting stress and
other vital parameters. The analysis is done by using commercially available and proprietary
software tools.
Reviews:
Based on a given envelope the bearing design includes also the selection of bearing materials
including lubricants. CEROBEAR uses well known materials like AISI 440 C (AMS 5618) but also • Preliminary Designs Review
and Critical Design Review
new steels such as X30 (AMS 5898) which offers better resistance against corrosion and wear.
Balls can be also made of steel (AISI 440 C) or alternatively of Si3N4 (ASTM F 2094) which offers • Test Readiness Review
(acceptanc test)
additional lifetime. CEROBEAR offers
a wide variety of design options,
materials for rings, balls and cages.
Depending on the application space Data Package
(EIDP End Item Data Package) with
bearings are either lubricated with
• CoC
oil (grease) or with a dry lubricant
• Inspection Report (Dimensions, Mas)
such as MoS2, silver or lead.
• Preload Protocol
Under special conditions a hybrid • RUN-IN and Friction Measurements Protocol
(Acceptance Test)
bearing with ceramic rolling
• Material Certificates
elements can be used without
additional lubricant (dry run).
Ball & Roller Bearings for Space Applications
6
6
CEROBEAR’s space product portfolio Bearing Rings:*
• AISI 440 C (AMS 5618)
Ball Bearings Roller Bearings • AISI 440C (AMS 5880)
• X30 CrMoN 15 1 (AMS 5898)
¾ radial/deep groove ball bearing ¾ cylindrical roller bearings
• X40 CrMoVN 16 2 (AMS 5925)
¾ angular contact bearings ¾ needle roller bearings • M50 (AMS 6491)
(duplex pairs, super duplex bearings) • Inconel 718 (AMS 5663…..)
¾ tapered roller bearings
matched and preloaded • Silicon Nitride (HIP Si3N4)
¾ barrel and spherical roller bearings • Zirconia (Y-TZP, Mg-ZrO2…)
¾ thrust ball bearings
• AISI 440C (AMS 5880)
• 100 Cr 6 (SAE 52100)
Rolling Elements:*
• AISI 440C (AMS 5618)
• Silicon Nitride (HIP Si3N4)
• Zirconia (Y-TZP)
• M50 (AMS 6491)
• 100 Cr6 (SAE 52100)
• others upon request
Hybrid-Ceramic, All-Metal, All-Ceramic Versions
available for all bearing types
Coatings:*
¾ Bearing design according to ISO or ABEC standard dimensions or fully customized • Silver
• MoS2
¾ Bearing ID 8 mm to OD 650 mm capabilities
• Dicronite .
¾ Accuracy up to ABEC/RBEC 7 (9) corresponding to ISO class 4 (class 2)
* This is only a repre- Cages:*
sentative selection ¾ Rollers/needles from dia. 2.0 to 40 mm
• Phenolic
of our materials. For
more information ¾ Quantities from 4 prototype (< 10) to serial quantity per type • PEEK
about additional
materials, please • PTFE, PGM-HT
contact us.
• Steel (a variety)
CEROBEAR Space Bearing Brochure
7
Examples of Mechanism Bearings Produced by CEROBEAR
WET LUBRICATED WET LUBRICATED
} Bearing Ring: AISI 440 C (AMS 5618) } Bearing Ring: High Nitrogen Steel X30 CrMoN 15 1
(AMS 5898, Cronidur 30)
} Balls: AISI 440 C
} Balls: Ceramic (Si3N4, ZrO2) or steel (AISI 440 C per AMS 5618)
} Cage: Phenolic cage vacuum impregnation with oil
} Cage: PEEK (no oil-impregnation needed)
} Lubrication:
Mechanisms } Lubrication:
} Oil or grease based on synthetic hydrocarbons or
Application Examples
PFPE/PTFE (with low evaporation at vacuum) } Oil or grease based on synthetic hydrocarbons or PFPE/PTFE
} Pointing Control (with low evaporation at vacuum)
} Solar Array Drive
“Heritage Design” “Next Generation Materials”
} Solar Array Deploy
} Rotary Joints
} Actuators of all types
DRY RUNNING } Laser Communication DRY RUNNING
Terminals
} Bearing Rings: AISI 440 C or X30 CrMoN 15 1
} Bearing Ring: AISI 440 C (AMS 5618) } Filter Wheels
(AMS 5898, Cronidur 30), Ceramic (Si3N4, ZrO2)
} Robotic Arms
} Balls: AISI 440 C
} Mirror Movement } Balls: Ceramic Si3N4, ZrO2
} Cage: PGM-HT, PTFE } and more ...
} Cage: PGM-HT, PTFE
} Lubrication:
} Lubrication:
} Lubrication by a dry lubricant coating } no further coating or
(e.g. MoS2-, silver coating on raceway and balls) } Lubrication by a dry lubricant coating
(e.g. MoS2-, silver coating on raceway and balls)
Ball
8
& Roller Bearings for Space Applications
CEROBEAR‘s Market Focus Challenging Design & Manufacture To Customer
Application Requirements Requirements With Speed
9 Corrosive Environments Is Our Standard Practice
9 High Temperature
Some Possible Customizations Using CEROBEAR
9 Cryogenic Temperature
Production Technology:
9 Poor/Low Lubrication
9 Media Lubrication ¾ adaptation of bearing play or contact angle
9 Dry Running ¾ adaptation of bearing tolerances
9 Design Customization ¾ adaptation of bearing stiffness
9 Full System Integration ¾ adaptation of bearing sealing
9 High Speed ¾ user-defined change of bearing dimensions
9 High Load ¾ integration of threads or splines
9 Reduced Weight and Inertia ¾ oil bores for direct-oil lubrication
9 Low Friction ¾ bearings with anti-rotation device
9 Non-Magnetic ¾ integrated bearings with flange
9 Electrically Non-Conductive ¾ coatings for protection or lubrication
9 Electrically Conductive ¾ and much more…………..
9 And more…………
CEROBEAR Space Bearing Brochure
9
Turbo Pump Bearing Design – Examples - and Materials
Bearing Types: Lubricating Media and Bearing dimensions: Cage design for
(Hybrid or Steel) Angular contact ball bearings Operating Temperatures: ID: from 8 mm to 80 mm high speed capability:
(Hybrid of Steel) Three point ball bearings LH2: 22 °K OD: from 20 mm to 140 mm
• Outer-land guided
(Hybrid of Steel) Deep groove ball bearings LOX: 91 °K High rotational speed: Up to 3 x 10*6 DN
(Hybrid or Steel) Cylindrical roller bearings Kerosene Rocket Propellant: 293 °K • Ball pocket size and radial
clearance optimized for
max. cage stability at
operating conditions
(speed and temperature)
Rolling Elements:
• Si3N4 (silicon nitride) for LH2 and Kerosene
• AISI 440 C for LOX (if electrical conductivity is needed
Cages (self-lubricating materials for cryogenic conditions):
Cages (for non-cryogenic conditions):
• PTFE-based materials
• PEEK
• PTFE reinforced with GF (glas fiber)
• Steel with silver coating
• Glass or carbon fiber wrapped in tubes impregnated with PTFE (TCGF116 - Armalon)
Bearing Rings:
Coatings (optional): HNS-steel (high nitrogen steel) – AMS 5898, alternativly AISI 440 C (AMS 5618)
• Silver (sputtered, on raceway)
AMS 5898 was used the SSME and offers the best resistance against wear and
• Lead (sputtered, on raceway)
fatigue under boundary conditions (with media lubrication)
10
We welcome your enquiries from around the world
and look forward to hearing from you.
For more information on CEROBEAR and our unique technology and products,
please contact us:
CEROBEAR GmbH Johannes Kreuser
Aerospace Project Engineer - Senior Specialist Space
Kaiserstr. 100 Manager Thin Section Bearings
52134 Herzogenrath
Phone +49 2407 9556-14
GERMANY Johannes.Kreuser@cerobear.com
Phone: +49 2407 9556 - 0 Tony Taglialavore
Business Development Manager
Fax: +49 2407 96224
Aerospace Market
Email: cb-sales@cerobear.com
www.cerobear.com Mobile +1 719 2376859
Tony.Taglialavore@cerobear.com
09/2021You can also read
