GB2448649A - Low friction ball separator for propeller blade ball bearings - Google Patents

Low friction ball separator for propeller blade ball bearings Download PDF

Info

Publication number
GB2448649A
GB2448649A GB0815240A GB0815240A GB2448649A GB 2448649 A GB2448649 A GB 2448649A GB 0815240 A GB0815240 A GB 0815240A GB 0815240 A GB0815240 A GB 0815240A GB 2448649 A GB2448649 A GB 2448649A
Authority
GB
United Kingdom
Prior art keywords
ball
separator
pockets
ball separator
propeller blade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0815240A
Other versions
GB0815240D0 (en
GB2448649B (en
Inventor
Paul A Carvalho
Aaron T Nardi
Robert W Pruden
Noah M Toth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hamilton Sundstrand Corp
Original Assignee
Hamilton Sundstrand Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hamilton Sundstrand Corp filed Critical Hamilton Sundstrand Corp
Publication of GB0815240D0 publication Critical patent/GB0815240D0/en
Publication of GB2448649A publication Critical patent/GB2448649A/en
Application granted granted Critical
Publication of GB2448649B publication Critical patent/GB2448649B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable
    • F04D29/362—Blade mountings adjustable during rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/02—Hub construction
    • B64C11/04—Blade mountings
    • B64C11/06—Blade mountings for variable-pitch blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/059—Roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/37—Loose spacing bodies
    • F16C33/3706—Loose spacing bodies with concave surfaces conforming to the shape of the rolling elements, e.g. the spacing bodies are in sliding contact with the rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/3825—Ball cages formed as a flexible belt, e.g. spacers connected by a thin film
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/41—Ball cages comb-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • F16C43/06—Placing rolling bodies in cages or bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/10—Application independent of particular apparatuses related to size
    • F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

A ball separator is utilized to mount and insert a plurality of ball bearings into mating grooves in a propeller hub and propeller blade. The ball separator has a link portion connecting a plurality of pockets. The pockets support spaced ones of said ball bearings. The pockets have a surface that includes at least two distinct surface portions. A central surface portion closely matches an outer periphery of the ball bearing, while a second portion formed around the first portion is spaced by a slightly greater amount. The second portion is not in contact with the ball bearing, and thus friction is reduced and clearance is provided for circulation of oil. On the other hand, the second portion does provide support to hold the ball bearing within the ball separator when the ball separator is being inserted or removed into the grooves. In addition, a material is developed for forming the ball separator with the material minimizing stick-slip problems. The material is a Nylon 6/6 filled by PTFE and a fluorinated lubricating oil to a total combined additive level of between 6 and 12% by weight.
GB0815240A 2006-05-18 2006-05-18 Low friction ball separator for propeller blade ball bearings Active GB2448649B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2006/019437 WO2007136367A1 (en) 2006-05-18 2006-05-18 Low friction ball separator for propeller blade ball bearings

Publications (3)

Publication Number Publication Date
GB0815240D0 GB0815240D0 (en) 2008-09-24
GB2448649A true GB2448649A (en) 2008-10-22
GB2448649B GB2448649B (en) 2011-03-30

Family

ID=38723586

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0815240A Active GB2448649B (en) 2006-05-18 2006-05-18 Low friction ball separator for propeller blade ball bearings

Country Status (3)

Country Link
DE (1) DE112006003836T5 (en)
GB (1) GB2448649B (en)
WO (1) WO2007136367A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8801383B2 (en) 2011-06-29 2014-08-12 Hamilton Sundstrand Corporation Ball bearing retention for propeller blade and method of assembly

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8167501B2 (en) 2009-02-02 2012-05-01 Hamilton Sundstrand Corporation Separator for bearing assemblies with cyclic loads
US20110194937A1 (en) * 2010-02-05 2011-08-11 Rotating Composite Technologies, Llc Preloaded bearing for rotor blade
US9381996B2 (en) * 2013-05-09 2016-07-05 Hamilton Sundstrand Corporation Split blade retention race with inner and outer chamfers
US20160017918A1 (en) * 2014-07-16 2016-01-21 Hamilton Sundstrand Corporation Ball separator for ball bearing assembly
FR3098263B1 (en) * 2019-07-03 2021-07-02 Ntn Snr Roulements Assembly process AND mechanical assembly INCLUDING ROLLING BODIES SEPARATED BY INDIVIDUAL SPACERS
US11286987B2 (en) * 2019-07-03 2022-03-29 Ntn-Snr Roulements Bearing cage, associated assembly and associated mounting and dismantling methods

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566421A (en) * 1948-11-23 1951-09-04 Donald H Lapointe Antifriction bearing-retaining strip
US4133588A (en) * 1978-01-06 1979-01-09 Industrial Molding Corporation Ball separator for ball bearing
US4692097A (en) * 1985-06-26 1987-09-08 Fonderie Musil Propeller with removable and adjustable blades
US4838712A (en) * 1985-06-28 1989-06-13 Nippon Seiko Kabushiki Kaisha Ball bearing and the retainer thereof
US6643932B2 (en) * 1999-10-26 2003-11-11 Tsubaki Nakashima Co., Ltd. Method for inserting balls and spacers into ball screw device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2499837A (en) * 1944-01-19 1950-03-07 Curtiss Wright Corp Propeller blade and the art of assembling a bearing thereon

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566421A (en) * 1948-11-23 1951-09-04 Donald H Lapointe Antifriction bearing-retaining strip
US4133588A (en) * 1978-01-06 1979-01-09 Industrial Molding Corporation Ball separator for ball bearing
US4692097A (en) * 1985-06-26 1987-09-08 Fonderie Musil Propeller with removable and adjustable blades
US4838712A (en) * 1985-06-28 1989-06-13 Nippon Seiko Kabushiki Kaisha Ball bearing and the retainer thereof
US6643932B2 (en) * 1999-10-26 2003-11-11 Tsubaki Nakashima Co., Ltd. Method for inserting balls and spacers into ball screw device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8801383B2 (en) 2011-06-29 2014-08-12 Hamilton Sundstrand Corporation Ball bearing retention for propeller blade and method of assembly

Also Published As

Publication number Publication date
GB0815240D0 (en) 2008-09-24
GB2448649B (en) 2011-03-30
WO2007136367A1 (en) 2007-11-29
DE112006003836T5 (en) 2009-02-19

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