WO2004025129A1 - High speed bearing, especially for spinning machine - Google Patents

High speed bearing, especially for spinning machine Download PDF

Info

Publication number
WO2004025129A1
WO2004025129A1 PCT/SK2003/000015 SK0300015W WO2004025129A1 WO 2004025129 A1 WO2004025129 A1 WO 2004025129A1 SK 0300015 W SK0300015 W SK 0300015W WO 2004025129 A1 WO2004025129 A1 WO 2004025129A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
raceways
diameter
strengthened
bearing
Prior art date
Application number
PCT/SK2003/000015
Other languages
French (fr)
Inventor
Jan Milucky
Ivan Kremen
Original Assignee
Kinex, A.S.
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 Kinex, A.S. filed Critical Kinex, A.S.
Publication of WO2004025129A1 publication Critical patent/WO2004025129A1/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
    • D01H4/12—Rotor bearings; Arrangements for driving or stopping
    • 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
    • F16C19/18—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 two or more rows 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
    • F16C2340/00—Apparatus for treating textiles
    • F16C2340/18—Apparatus for spinning or twisting

Definitions

  • This invention relates to a high speed bearing of a spinning rotor unit, especially for an open-end spinning machine.
  • a spinning rotor is pressed onto a shaft end of the high speed bearing which is mounted into a damping system (so-called elastic bush) reducing noise and vibrations during operation of the spinning machine
  • the spinning machine comprises many spinning units with the high speed bearings according to a type of spinnig machine.
  • a high speed bearing used nowadays for spinning unit of a spinning machine is a special high precision double row rolling bearing, consisting of a bearing shaft with two inner raceways created directly into this shaft, an outer bearing ring with two outer raceways created directly into this outer ring, rolling elements-high precision balls led by cages in the shaft and outer ring raceways, of proper type and amount of grease, and inner bearing space is closed with the shields.
  • the at the present time used high speed bearing is arranged in such way that its shaft diameter is either constant along its length or it is only strengthened between the first and the second shaft raceway in such manner that the shaft strengthening does not extend up to the space of both shaft raceways. This strengthening between shaft raceways, e.g.
  • the bearing shaft of a high speed bearing fitted with a spinning rotor can reach during operation very high speed.
  • very important dynamic rigidity of the rotating shaft fitted with the spinning rotor very important dynamic rigidity of the rotating shaft fitted with the spinning rotor.
  • the dynamic rigidity of the rotating shaft fitted with the spinning rotor depends on arrangement of rotor itself (its dimensions, mass and location) and above all on the rigidity of the bearing shaft.
  • the smooth and even running of the rolling bearing at the high speed is very important with regard to reaching maximum bearing life. Non-smooth and non-even running of the rolling bearing at high speed caused by insufficient shaft rigidity can result in initiation of undesirable excessive forces acting on the high speed bearing and these excessive forces can sharply reduce bearing life and its reliability to fulfill required function.
  • the goal of this invention is a such engineering solution of the high speed bearing by means of which a new efficient arrangement can be reached that makes possible further increase of the shaft rigidity resulting in increase of high speed bearing life and increase of reliability to fulfill required function. All these advantages can be reached without any change of outside assembly bearing dimensions of the high speed bearing usually used nowadays. Disclosure of Invention
  • the essence of the invention resides in such technical solution wherein the shaft raceways are created with some distance directly in the shaft and the whole shaft raceways widths are situated in the strengthened part of the shaft and the length of this strengthened part of the shaft is longer than the distance of the shaft raceways and is smaller than the length of the outer ring and simultaneously an optional diameter of the strengthened part of the shaft is bigger than an optional diameter of the shaft raceways and simultaneously an optional diameter of any shaft ends is smaller than an optional diameter of the strengthened part of the shaft, and a diameter of the strengthened part of the shaft may be but needn't be equal and constant along the whole length of the strengthened shaft part.
  • the further essence of the invention resides in such technical solution wherein the both raceways are created with some distance directly in the shaft in such way that simultaneously reach with their border sections both the strengthened shaft part and the shaft ends and the width of each shaft raceway makes a transitional part between the strengthened part and the shaft ends, and simultaneously an optional diameter of the strengthened part of the shaft is bigger than an optional diameter of the shaft raceways and is also bigger than an optional diameter of the shaft ends, and an optional diameter of the shaft ends is simultaneously bigger than the raceway diameter of any shaft raceways.
  • the diameter of the strengthened part of the shaft may but needn't be equal and constant along the whole length of the strengthened shaft part.
  • the main advantage of technical solution according to this invention resides in it that this technical solution makes possible by keeping to at present used outside bearing assembly dimensions of high speed bearing further increse of shaft rigidity and by means of it also increase the dynamic rigidity of the rotating shaft with fitted spinning rotor against t ⁇ e present state of the art.
  • Higher dynamic rigidity of the rotating shaft with fitted spinning rotor enables to reach more evener and smoother running during high speed operation which result in further increasing bearing life and its reliability to fulfill required function.
  • Fig. 1 is a longitudinal section for the first essence of the invention.
  • Fig. 2 is a longitudinal section for the other essence of the invention. Best Mode for Carrying Out the Invention
  • the high speed bearing especially for spinning machine, intended for fitting with spinning rotor, consisting of a bearing shaft 3 with two inner raceways 1 and 2 created directly into this shaft, an outer bearing ring 4 with two outer raceways created directly into this outer ring, rolling elements-high precision balls 5 led by cages 6 in the shaft and outer ring raceways, of proper type and amount of grease, and inner bearing space is closed with the shields 7.
  • An example for carrying out the invention according to its first essence is a high speed bearing wherein the shaft 3 has a strengthened part with diameters of D and with length of LS which is shorter than length of LH of the outer ring 4 and longer than shaft raceway distance of T .
  • 2 and widths of B and B2 are created with distance of T directly in the strengthened part of the shaft in such way that their whole widths are located in this strengthened part.
  • An optional diameter of the strengthened shaft part is bigger than an optional diameter of the shaft raceways and simultaneously an optional diameter of shaft end parts is smaller than an optional diameter of the stregthened part of the shaft.
  • An example for carrying out the invention according to its further essence is a high speed bearing wherein the shaft 3 has a strengthened part with diameter of D , and shaft raceways 1 and 2 with diameters of Dil and Di2 and widths of BJ. and B2 are created with distance of T which is shorter than a length of LH of an outer ring 4 directly in the shaft in such way that the shaft raceways simultaneously reach with their border sections both the strengthened part of the shaft with diameter of D and the end parts of the shaft with diameters of d . and d2 , and simultaneously the diameter of D of the strengthened part of the shaft is bigger than an optional diameter of the shaft end parts, and an optional diameter of the shaft end parts is simultaneously bigger than the shaft raceway diameter.
  • outside bearing dimensions used nowadays may be: shaft end diameter of 8.9 mm, outer ring diameter of 22 mm, length of outer ring of 61 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

High speed bearing, especially for textile machinery consisting of a shaft (3) with two inner raceways (1) and (2) with diameters of (Di1), (Di2) and widths of (B1 ), (B2) created directly into the shaft with a distance of (1), an outer ring (4) with two outer raceways created directly into the outer ring, balls (5) led by cages (6) in bearing raceways, shields (7) and of grease wherein a strengthened part of the shaft is extended to space of both raceways (1) and (2) and its length is shorter than the length (LH) of the outer ring (4) and simultaneously an optional diameter (D), (D1), (D2) of the strengthened shaft part (3) is bigger than an optional diameter of raceways (1) and (2) and simultaneously an optional diameter (d1), (d2) of shaft ends is smaller than an optional diameter (D), (D1),(D2) of strengthened part (3).

Description

HIGH SPEED BEARING, ESPECIALLY FOR SPINNING MACHINE
Technical Field
This invention relates to a high speed bearing of a spinning rotor unit, especially for an open-end spinning machine. A spinning rotor is pressed onto a shaft end of the high speed bearing which is mounted into a damping system (so-called elastic bush) reducing noise and vibrations during operation of the spinning machine The spinning machine comprises many spinning units with the high speed bearings according to a type of spinnig machine.
Background Art
A high speed bearing used nowadays for spinning unit of a spinning machine is a special high precision double row rolling bearing, consisting of a bearing shaft with two inner raceways created directly into this shaft, an outer bearing ring with two outer raceways created directly into this outer ring, rolling elements-high precision balls led by cages in the shaft and outer ring raceways, of proper type and amount of grease, and inner bearing space is closed with the shields. The at the present time used high speed bearing is arranged in such way that its shaft diameter is either constant along its length or it is only strengthened between the first and the second shaft raceway in such manner that the shaft strengthening does not extend up to the space of both shaft raceways. This strengthening between shaft raceways, e.g. known from a document CS 277083 increases rigidity of the shaft against a shaft without strengthening (with a constant diameter along the shaft), but the strengthening is limited only on the space between shaft raceways and does not extend up to the raceways themselves. By this present technical state and by keeping to at the present time used outside assembly bearing dimensions it is limited further increase of shaft rigidity, and it is a disadvantage of the present state of the art.
The bearing shaft of a high speed bearing fitted with a spinning rotor can reach during operation very high speed. At the high speed, especially at speed over 90 000 RPM that is beacause of smooth and even running of the high speed bearing very important dynamic rigidity of the rotating shaft fitted with the spinning rotor. The dynamic rigidity of the rotating shaft fitted with the spinning rotor depends on arrangement of rotor itself (its dimensions, mass and location) and above all on the rigidity of the bearing shaft. The smooth and even running of the rolling bearing at the high speed is very important with regard to reaching maximum bearing life. Non-smooth and non-even running of the rolling bearing at high speed caused by insufficient shaft rigidity can result in initiation of undesirable excessive forces acting on the high speed bearing and these excessive forces can sharply reduce bearing life and its reliability to fulfill required function.
The goal of this invention is a such engineering solution of the high speed bearing by means of which a new efficient arrangement can be reached that makes possible further increase of the shaft rigidity resulting in increase of high speed bearing life and increase of reliability to fulfill required function. All these advantages can be reached without any change of outside assembly bearing dimensions of the high speed bearing usually used nowadays. Disclosure of Invention
Further improvement of the present state of the art enables the invention - high speed bearing, especially for spinning machine, consisting of a shaft with two inner raceways created with a raceways distance directly into the. shaft, an outer ring with two outer raceways created with corresponding distance directly into the outer ring, balls led by cages in the bearing raceways, grease and of shields. The invention enables by means of a new more proper arrangement of internal bearing design to enlarge a length of strengthened part of the shaft and by means of this srengthening further increase of shaft rigidity which is the main advantage against the present state of the art. The essence of the invention resides in such technical solution wherein the shaft raceways are created with some distance directly in the shaft and the whole shaft raceways widths are situated in the strengthened part of the shaft and the length of this strengthened part of the shaft is longer than the distance of the shaft raceways and is smaller than the length of the outer ring and simultaneously an optional diameter of the strengthened part of the shaft is bigger than an optional diameter of the shaft raceways and simultaneously an optional diameter of any shaft ends is smaller than an optional diameter of the strengthened part of the shaft, and a diameter of the strengthened part of the shaft may be but needn't be equal and constant along the whole length of the strengthened shaft part.
The further essence of the invention resides in such technical solution wherein the both raceways are created with some distance directly in the shaft in such way that simultaneously reach with their border sections both the strengthened shaft part and the shaft ends and the width of each shaft raceway makes a transitional part between the strengthened part and the shaft ends, and simultaneously an optional diameter of the strengthened part of the shaft is bigger than an optional diameter of the shaft raceways and is also bigger than an optional diameter of the shaft ends, and an optional diameter of the shaft ends is simultaneously bigger than the raceway diameter of any shaft raceways. The diameter of the strengthened part of the shaft may but needn't be equal and constant along the whole length of the strengthened shaft part. The main advantage of technical solution according to this invention resides in it that this technical solution makes possible by keeping to at present used outside bearing assembly dimensions of high speed bearing further increse of shaft rigidity and by means of it also increase the dynamic rigidity of the rotating shaft with fitted spinning rotor against tήe present state of the art. Higher dynamic rigidity of the rotating shaft with fitted spinning rotor enables to reach more evener and smoother running during high speed operation which result in further increasing bearing life and its reliability to fulfill required function.
Brief description of Drawings
Examples of new arrangement of the high speed bearing according to the invention are illustrated on attached drawings.
Fig. 1 is a longitudinal section for the first essence of the invention.
Fig. 2 is a longitudinal section for the other essence of the invention. Best Mode for Carrying Out the Invention
The high speed bearing, especially for spinning machine, intended for fitting with spinning rotor, consisting of a bearing shaft 3 with two inner raceways 1 and 2 created directly into this shaft, an outer bearing ring 4 with two outer raceways created directly into this outer ring, rolling elements-high precision balls 5 led by cages 6 in the shaft and outer ring raceways, of proper type and amount of grease, and inner bearing space is closed with the shields 7.
An example for carrying out the invention according to its first essence is a high speed bearing wherein the shaft 3 has a strengthened part with diameters of D and with length of LS which is shorter than length of LH of the outer ring 4 and longer than shaft raceway distance of T . Shaft raceways 1 and 2 with diameters of DM. and D|2 and widths of B and B2 are created with distance of T directly in the strengthened part of the shaft in such way that their whole widths are located in this strengthened part. An optional diameter of the strengthened shaft part is bigger than an optional diameter of the shaft raceways and simultaneously an optional diameter of shaft end parts is smaller than an optional diameter of the stregthened part of the shaft. An example for carrying out the invention according to its further essence is a high speed bearing wherein the shaft 3 has a strengthened part with diameter of D , and shaft raceways 1 and 2 with diameters of Dil and Di2 and widths of BJ. and B2 are created with distance of T which is shorter than a length of LH of an outer ring 4 directly in the shaft in such way that the shaft raceways simultaneously reach with their border sections both the strengthened part of the shaft with diameter of D and the end parts of the shaft with diameters of d . and d2 , and simultaneously the diameter of D of the strengthened part of the shaft is bigger than an optional diameter of the shaft end parts, and an optional diameter of the shaft end parts is simultaneously bigger than the shaft raceway diameter.
For example outside bearing dimensions used nowadays may be: shaft end diameter of 8.9 mm, outer ring diameter of 22 mm, length of outer ring of 61 mm.
Industrial Applicability
The aspect that the new more proper arrangement of high speed bearing according to the invention can be reached without changing outside bearing assembly dimensions is very important because of using spare parts for present textile machines and of course this aspect is very important because of no changes are required in connection with mounting and maintenance of spinning rotor, spinning unit, damping system and spinning machine which enables immediate industrial applicability of the invention.

Claims

Claims
1. High speed bearing, especially for spinning machine, intended for fitting with a spinning rotor consisting of a shaft with two inner raceways created with a raceways distance directly in the shaft, an outer ring with two outer raceways created with corresponding distance directly in the outer ring, balls led by cages in bearing raceways, grease and of shields characterized by that the shaft (3) has a strengthened part with diameters of (D), (D1) and (D2) and with length of (LS) which is shorter than length of (LH) of the outer ring (4) and longer than shaft raceway distance of (T), wherein the shaft raceways (1) and (2) with diameters of (Di1) and (Di2) and widths of (B1 ) and (B2) are created with distance of (T) directly in the strengthened part of the shaft in such way that whole shaft raceways widths are located in this strengthened part and an optional diameter of the strengthened shaft part is bigger than an optional diameter of the shaft raceways and simultaneously an optional diameter of (d1) and (d2) of shaft ends is smaller than an optional diameter of the stregthened part of the shaft, and diameters of (D), (D1) and (D2) of the strengthened part of the shaft may be but needn't be equal and constant along the whole length of the strengthened shaft part.
2. High speed bearing, especially for spinning machine according to claim 1 , characterized by that the shaft (3) has a strengthened part with diameter of (D), and shaft raceways (1) and (2) with diameters of (Di1) and (Di2) and widths of (B1) and (B2) are created with distance of (T) which is shorter than a length of (LH) of an outer ring (4) directly in the shaft in such way that the shaft raceways simultaneously reach with their border sections both the strengthened part of the shaft with diameter of (D) and the shaft ends with diameters of (d1) and (d2), and the width of each shaft raceway makes a transitional part between the strengthened part and the shaft ends, and simultaneously an optional diameter of (D) of the strengthened part of the shaft is bigger than the shaft raceway diameter of (Di1) and (Di2), and is also bigger than an optional diameter of the shaft end parts, and an optional diameter of the shaft ends is simultaneously bigger than the shaft raceway diameter of (Di1) and (Di2), and the diameter of (D) of the strengthened part of the shaft may but needn't be equal and constant along the whole length of the strengthened shaft part.
PCT/SK2003/000015 2002-09-13 2003-09-10 High speed bearing, especially for spinning machine WO2004025129A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SK13332002A SK13332002A3 (en) 2002-09-13 2002-09-13 High-speed bearing, particularly of the spinning machine
SK1333-2002 2002-09-13

Publications (1)

Publication Number Publication Date
WO2004025129A1 true WO2004025129A1 (en) 2004-03-25

Family

ID=31989673

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SK2003/000015 WO2004025129A1 (en) 2002-09-13 2003-09-10 High speed bearing, especially for spinning machine

Country Status (2)

Country Link
SK (1) SK13332002A3 (en)
WO (1) WO2004025129A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2124247A1 (en) * 1971-05-15 1972-11-30 Schaeffler Ohg Industriewerk Double row angular contact ball bearing
DE3018091A1 (en) * 1980-05-12 1981-11-19 Anschütz & Co GmbH, 2300 Kiel Gyroscope rotor shaft bearing without play - has common bush outer bearing surfaces for coaxial roller bearing rings
US4603983A (en) * 1984-12-22 1986-08-05 Fag Kugelfischer Georg Schafer (Kgaa) Axial shift arrangement for two-row angular-contact bearing
DE4104453A1 (en) * 1990-03-08 1991-09-12 Zkl Vyzkumny Ustav Pro Valiva High speed bearing for spinning rotors in textile machinery - has thickened shaft dia. between ball races to increase rigidity for higher speeds
US5071316A (en) * 1991-02-11 1991-12-10 General Motors Corporation Combination coolant pump drip collection, belt tensioner
DE19744532A1 (en) * 1996-10-11 1998-04-16 Rieter Elitex As Twin row ball bearing for a spinning rotor
US6168316B1 (en) * 1998-08-27 2001-01-02 Nsk-Rhp European Technology Co., Limited Bearing assembly for use with water pumps

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2124247A1 (en) * 1971-05-15 1972-11-30 Schaeffler Ohg Industriewerk Double row angular contact ball bearing
DE3018091A1 (en) * 1980-05-12 1981-11-19 Anschütz & Co GmbH, 2300 Kiel Gyroscope rotor shaft bearing without play - has common bush outer bearing surfaces for coaxial roller bearing rings
US4603983A (en) * 1984-12-22 1986-08-05 Fag Kugelfischer Georg Schafer (Kgaa) Axial shift arrangement for two-row angular-contact bearing
DE4104453A1 (en) * 1990-03-08 1991-09-12 Zkl Vyzkumny Ustav Pro Valiva High speed bearing for spinning rotors in textile machinery - has thickened shaft dia. between ball races to increase rigidity for higher speeds
US5071316A (en) * 1991-02-11 1991-12-10 General Motors Corporation Combination coolant pump drip collection, belt tensioner
DE19744532A1 (en) * 1996-10-11 1998-04-16 Rieter Elitex As Twin row ball bearing for a spinning rotor
US6168316B1 (en) * 1998-08-27 2001-01-02 Nsk-Rhp European Technology Co., Limited Bearing assembly for use with water pumps

Also Published As

Publication number Publication date
SK13332002A3 (en) 2004-10-05

Similar Documents

Publication Publication Date Title
CN1847680B (en) Multi-row cylindrical roller bearing
US6315459B1 (en) Synthetic resin cage for roller bearing
CN100400907C (en) Rotation support device for compressor pulley
JP3357735B2 (en) Roller with cage
US11828284B2 (en) Screw compressor element and machine
CN109563879A (en) Ball bearing, main shaft device and lathe
JP3877004B2 (en) Double row cylindrical roller bearing
WO2004025129A1 (en) High speed bearing, especially for spinning machine
CN203202013U (en) Angular-contact ball bearing
US8529134B2 (en) Rolling bearing apparatus
JP2014025525A (en) Oil air lubrication type rolling bearing device
CN110748557A (en) Novel damping aligning slide bearing
JP6975710B2 (en) Ball bearing structure with tilt compensation
JP2004003577A (en) Bearing device and machine tool main spindle
CN101205645A (en) Drafting shaft support bearing of spinning machine
CN200996410Y (en) Supporting bearing
JP5987290B2 (en) Bearing device
CN219529568U (en) Steel wire raceway bearing for CT machine
JP4322641B2 (en) Cylindrical roller bearing
JP2006200615A (en) Rolling bearing crowned cage
CN115135823B (en) Shaft bearing for supporting a spinning rotor of a rotor spinning machine
CN218598650U (en) Shaft connecting bearing adopting single-row angular contact structure
JP7453899B2 (en) Rolling bearing holding structure and rotating machinery using it
CN215928142U (en) Special bearing and bearing assembly for vacuum cylinder mould of paper making machinery production line
CN209957951U (en) High-speed spinning frame spindle with elastic rubber ring support

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CN IN PL

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase