CN112176468B - Rotor guard ring for rotor spinning machine - Google Patents
Rotor guard ring for rotor spinning machine Download PDFInfo
- Publication number
- CN112176468B CN112176468B CN202010540904.9A CN202010540904A CN112176468B CN 112176468 B CN112176468 B CN 112176468B CN 202010540904 A CN202010540904 A CN 202010540904A CN 112176468 B CN112176468 B CN 112176468B
- Authority
- CN
- China
- Prior art keywords
- spinning
- rotor
- bearing unit
- grommet
- spinning rotor
- 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.)
- Expired - Fee Related
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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
-
- 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
- D01H4/10—Rotors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
The invention relates to a rotor guard ring for a rotor spinning machine. The invention also relates to a spinning box for the rotor spinning machine and the rotor spinning machine. In order to propose a device for protecting a spinning rotor of a rotor spinning machine from particles from a damaged bearing unit, for preventing contamination of the spinning rotor with lubricant from the bearing unit of a rotor assembly, and for protecting fibre material or roving supplied to the spinning rotor and yarn produced by the spinning rotor from contamination by lubricant from the bearing unit, a grommet comprising a front plate section with a hub opening for a grommet to be placed on a spinning rotor shaft of the rotor spinning machine between the spinning rotor and the bearing unit, wherein the grommet is constructed as a separate component with respect to the spinning rotor, the spinning rotor shaft and the bearing unit, the grommet being arranged to protect the spinning rotor from lubricant from the bearing unit and/or from mechanical damage caused by wear or damage of the bearing unit.
Description
Technical Field
The invention relates to a retaining ring for a rotor of a rotor spinning machine, a spinning box for a rotor spinning machine and a rotor spinning machine.
Background
Rotor spinning machines are widely used for processing fiber materials or rovings into operable (workable) yarns by spinning rotors. The spinning rotor is usually part of a rotor assembly and is usually connected to a spinning rotor shaft of the rotor assembly. The rotor assembly, and in particular the spinning rotor shaft, is typically rotatably mounted to the housing of the rotor spinning machine or its spinning box via at least one bearing unit.
In rotor spinning machines, and in particular rotor spinning machines, the spinning rotor can be operated at speeds above 100000 rpm. There are thus large forces acting on the bearing unit which may lead to wear or even failure of the bearing unit. There is therefore a high risk that the accelerating part of the bearing unit hits the spinning rotor, which may result in an unbalance of the rotor in operation or may injure people in front of the spinning rotor. Furthermore, because of the high rotational speed of the bearing unit, lubricant may leak from the interior of the bearing unit and may be accelerated towards the spinning rotor, again leading to unbalance and contamination of the spinning rotor and of the yarn produced therefrom.
Disclosure of Invention
It can be stated that a first object of the invention is to protect a spinning rotor of a rotor spinning machine against mechanical damage, in particular against particles from damaged bearing units.
It is considered a further object of the present invention to prevent the contamination of the spinning rotor with lubricant from the bearing unit of the rotor assembly and thereby avoid imbalances which may lead to malfunctioning or even damage of the rotor spinning machine.
A further object of the invention may be to protect the fibre material or roving supplied to the spinning rotor and the yarn manufactured from the spinning rotor from contamination by lubricants of the bearing unit.
These and other objects are achieved by a grommet according to the invention for a rotor spinning machine, a spinning box for a spinning machine or a rotor spinning machine.
A grommet for a rotor spinning machine according to the invention comprises a front plate section with a hub opening for a grommet (which is to be arranged on a spinning rotor shaft of a rotor spinning machine between the spinning rotor and a bearing unit), wherein the grommet is constructed as a separate component with respect to the spinning rotor, the spinning rotor shaft and the bearing unit, and the grommet is provided for protecting the spinning rotor from lubricant of the bearing unit and/or mechanical damage caused by wear or damage of the bearing unit.
The spinning box of a rotor spinning machine according to the invention comprises at least a spinning rotor arranged on a spinning rotor shaft, which is rotatably mounted to the spinning box by means of at least one bearing unit, wherein a grommet, and in particular a grommet according to the invention, is arranged on the spinning rotor shaft between the spinning rotor and the bearing unit.
The rotor spinning machine according to the invention comprises at least one, preferably several and most preferably several identical spinning boxes according to the invention and/or at least one grommet according to the invention.
The inventors have realized that placing a grommet between the spinning rotor and the bearing unit of the rotor spinning machine effectively protects the spinning rotor from mechanical parts of the bearing unit and lubricant in normal operation of the rotor spinning machine and in case of failure of the bearing unit.
A rotor spinning machine may be any machine for processing fiber material or roving into an operable yarn through a spinning rotor. The rotor spinning machine may comprise only a single rotor, which is arranged in particular in the spinning box. Preferably, the spinning machine comprises several spinning rotors and in particular several identical spinning boxes each comprising one spinning rotor. The rotor spinning machine may comprise further optional components especially arranged for processing the fiber material or the roving before spinning and/or the yarn after spinning.
In order to be able to process fiber material or roving, a rotor assembly is provided for allowing, in particular, a high rotational speed rotation of the spinning rotor. The rotor assembly advantageously comprises at least a spinning rotor, a spinning rotor shaft and at least one bearing unit. The rotor assembly may also comprise other parts such as belt rollers for transmission by means of the rotor shaft of the transmission belt or at least one resilient mounting for damping vibrations between the bearing unit and the housing.
The spinning rotor of this rotor spinning machine is a part or assembly for processing fiber material or roving into an operable yarn and in particular a spinning rotor of an open-end spinning machine. Preferably, the spinning rotor is a rotor cup (rotor cup), which is more preferably formed in one piece and/or from metal. Advantageously, the spinning rotor is a rotationally symmetrical part to avoid unbalance in rotation. Such spinning rotors can be spun in normal operation at rotational speeds of more than 100000 revolutions per minute or even up to 200000 revolutions per minute. Thus, even a slight imbalance results in a large force being applied to the rotating member which must be designed and/or configured to withstand the forces of normal operation.
The spinning rotor shaft can be formed as one part or as an assembly of several separate parts. Preferably, the spinning rotor shaft is constructed as a single piece extending from one end of the rotor assembly to the other. In particular, the spinning rotor shaft is provided for rotatably mounting the spinning rotor to the housing via at least one bearing unit. Advantageously, the spinning rotor shaft is a rotationally symmetrical part to avoid unbalance during rotation. The spinning rotor shaft may have a constant diameter along its entire length. Preferably, the diameter in the middle of the spinning rotor shaft and/or in the section between at least two bearing units, preferably between all bearing units, is larger than the diameter at the end of the spinning rotor shaft, in particular at the end used for mounting the spinning rotor.
At least one bearing unit is provided for rotatably mounting the spinning rotor shaft to a housing of the spinning box and/or of the rotor spinning machine. Preferably, at least two bearing units are arranged on the spinning rotor shaft. More preferably, all bearing units are identical to each other and/or spaced apart from each other along the spinning rotor axis. Most preferably, no other parts of the rotor assembly than the guard ring are placed on the spinning rotor shaft between the spinning rotor and one of the bearing units. The bearing unit may comprise, and in particular be, any type of bearing; preferably, however, the bearing units are all rolling bearings.
The grommet may be any component or assembly of components intended to be placed adjacent to and/or between a spinning rotor of a rotor spinning machine and a bearing unit to protect the spinning rotor. Preferably, the grommet is manufactured in one piece. The grommet may be made of any material, preferably of exactly one material, more preferably of metal, polymer and/or composite material, especially a fibre-reinforced composite material.
The guard ring is formed as a separate component with respect to the rotor assembly and/or the spinning rotor, the spinning rotor shaft and the bearing unit. This advantageously allows the grommet to be easily replaced and to be manufactured inexpensively. Being a separate component means that the shroud ring is not constructed in one piece and/or is not fixed or firmly mounted to the spinning rotor, the spinning rotor shaft or the bearing unit. Most preferably, the shroud ring only contacts the housing and/or the bearing unit or the spinning box of the rotor spinning machine.
According to the invention, a guard ring is positioned between the spinning rotor and the bearing unit. Advantageously, no further components are arranged on the spinning rotor shaft between the retaining ring and the bearing unit. Also according to the invention, the grommet is arranged on the spinning rotor shaft, which does not necessarily comprise a physical coupling of the grommet to the spinning rotor shaft. The grommet may be firmly mounted to the spinning rotor shaft and may thus rotate together with the spinning rotor shaft and the spinning rotor. Preferably, however, the grommet rests only on the spinning rotor shaft without physical coupling and in particular without being fixed or firmly mounted to the spinning rotor shaft. Most preferably there is a gap between the guard ring and the spinning rotor shaft. It is accordingly preferred that the grommet is not rotatably mounted to the rotor spinning machine together with the spinning rotor and/or that the grommet is mounted to a housing of the rotor spinning machine, in particular to a housing part also mounted with the bearing unit.
The hub opening of the guard ring therefore preferably has a larger diameter than the diameter of the spinning rotor shaft, at least at the location of the guard ring. It is further advantageous if the diameter of the hub opening is 0.01 to 5 mm, more preferably 0.05 to 2 mm, most preferably 0.1 to 1 mm larger than the diameter of the spinning rotor shaft to be inserted into the hub opening, in order to provide especially space for damping movements caused by the resilient mounting arranged around the bearing unit. Such a resilient mounting may be provided as a damping member, in particular for reducing vibrations of the rotor assembly and/or damping force transmission from the spinning rotor and the spinning rotor shaft to the housing.
In general, the hub opening can have any shape and size. Preferably, the shape of the hub opening is adapted to the shape of the cross-section of the spinning rotor shaft. More preferably, the hub opening has a circular shape and/or a constant radius. It is also preferred that the shroud ring has a rotationally symmetrical shape and/or that the hub opening is arranged in the centre of the shroud ring. The hub opening most preferably also has a rotationally symmetrical shape.
The guard ring is provided for protecting the spinning rotor against mechanical damage, in particular caused by rapidly moving parts or particles of the bearing unit caused by wear, damage and/or disintegration during operation of the rotor spinning machine. The protective ring is further provided for protection against the influence of lubricants, in particular from lubricants in the bearing unit caused by suction or centrifugal action in operation of the rotor spinning machine. In order to be able to provide this protection, the shroud ring, including the front plate section, is at least partially, preferably completely, manufactured from a solid material and/or has no further openings other than the hub opening. More preferably, at least the front plate section is formed in one piece and/or has a constant thickness, in particular in the axial direction of the hub opening. While the front plate segment may have any shape, it is preferred that the front plate segment be circular and/or that the hub opening be located at the center of the front plate segment. A grommet having such a front plate section is easy and inexpensive to manufacture and easy to install. Most preferably, the front plate segment is annular with a hub opening in the middle. Advantageously, the outer shape and/or the outer diameter of the front plate section is adapted to the opening of the housing, in which opening the grommet is intended to be mounted. In a particularly advantageous embodiment of the invention, the front plate section has a flat and/or fully closed protective surface facing the spinning rotor. It is also advantageous if the surface on the opposite side of the front plate section facing the bearing unit and/or the surface enclosed by the ring segments is also flat and/or completely closed.
In a preferred embodiment, the outer edge of the shroud ring, and in particular of the front plate section of the shroud ring, is formed as a first sealing surface to be seated on the housing surface. Such a sealing surface advantageously allows a complete protection of the spinning rotor from not only mechanical particles but also from lubricants, which may be fluid or pasty. In particular, the outer edge of the front plate section is preferably formed as a first sealing surface for a shroud ring to be mounted to the housing in a completely sealed connection. Most preferably, the first sealing surface is a radial sealing surface.
In order to ensure an even better sealing between the guard ring and the housing and thus a better protection of the spinning rotor, the guard ring may further comprise a ring segment, in particular coaxially protruding from one side of the front plate segment. The ring segment preferably comprises a second sealing surface to be placed in contact with a surface of the bearing unit and/or the housing. The ring segment may extend over the entire shroud ring perimeter and in particular on the surface of the front plate segment. The ring segments preferably extend over at least 50%, more preferably at least 75% and most preferably at least 85% of the circumference of the shroud ring. It is also preferred that the ring segment is arranged at the outer diameter of the shroud ring and in particular of the front plate segment. The ring segment and in particular the outer edge of the ring segment may have the same diameter as the front plate segment; but preferably the outer diameter of the ring segment is slightly smaller than the front plate segment. The second sealing surface may be arranged to be able to contact the housing, in particular to contact a surface in the radial and/or axial direction of the grommet.
Alternatively or additionally, the second sealing surface may be arranged to directly contact a surface of the bearing unit, in particular preferably in the axial direction of the guard ring. It is particularly preferred that the ring segment is arranged to be positioned adjacent to the bearing unit when forming a contact fit and/or a contact seal with a radial surface of the bearing unit. The radial surface of the bearing unit is most preferably arranged parallel to the front plate section, in particular the front plate section surface, and/or perpendicular to the axis through the hub opening. Advantageously, the shroud ring does not extend through the bearing section of the housing and/or partially or completely through the bearing unit. Particularly preferably, the bearing unit is not covered or surrounded by a shroud ring.
According to an advantageous embodiment of the grommet, a locking protrusion is arranged on the outer edge of the ring segment for locking the grommet to at least the housing of the spinning rotor, preferably also the bearing unit, wherein the locking protrusion is preferably arranged over more than 50%, more preferably at least 75% and most preferably between 75% and 90% of the circumference of the ring segment. Such a locking projection has the advantage that the grommet can be easily fixed to the housing of the rotor spinning machine, in particular in a force-fitting and/or form-fitting manner. The projection may thus also be part of the locking projection and the housing may comprise the groove. Alternatively, the locking projection is preferably a slot for receiving a corresponding projection of the housing. In particular, the locking projection is rigidly shaped and/or formed such that the protective ring is provided for insertion into the two-part housing and is fixed to the two-part housing, wherein the two parts of the housing are to be separated for the protective ring to be seated by means of the locking projection fixed to the two parts of the housing.
In order to provide an optimum protection of the spinning rotor against lubricant, in particular of the bearing unit, the front plate section and/or the ring section enclose a protective volume in the guard ring, in particular between the guard ring and the bearing unit, for collecting lubricant and/or particles of the bearing unit caused by wear or damage. The protective volume can be completely closed between the retaining ring, the bearing unit and possibly also the housing, but preferably the protective volume has an opening to the outside of the housing and/or pointing away from the spinning rotor. Such an opening may have to be arranged to avoid the formation of a negative pressure, i.e. below ambient pressure, which would result in more lubricant flowing out of the bearing unit.
It is therefore particularly preferred that the second sealing surface comprises a gas duct which opens into a protective volume in the retaining ring in order to avoid deviations from the ambient pressure, in particular below the ambient pressure, forming in this volume. The air duct may have any shape, size or direction of progression, but it is advantageous if the air duct is formed by an opening in said ring segment and/or the second sealing surface. In addition, the air duct preferably extends in the radial direction of the shroud ring and/or has a linear progression through the shroud ring and/or the housing.
In a further embodiment of the grommet according to the invention, the grommet and in particular the ring segment is arranged to at least partially, preferably completely and/or form-fittingly enclose a bearing unit to provide an even better protection of the spinning rotor. It is particularly advantageous that the shroud ring surrounds the outer surface of the bearing unit. Additionally or alternatively, the shroud ring may also contact the side wall of the bearing unit. According to a preferred embodiment, the shroud ring, and in particular the ring segment, is provided for retaining a bearing unit within the ring segment and/or for mounting to the housing with an outer edge.
Finally, it is preferred that the locking ring and/or the seal is placed in said surface and in particular embedded flush with the surface of the outer edge of the ring segment in the recess to allow a precise locking of the grommet to the housing with the locking screw and/or to provide a sealed connection of the grommet to the housing. The sealing and/or locking ring may be made of any material, but preferably the material is a polymer or rubber.
Drawings
These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.
Figure 1 shows a perspective view of a rotor assembly in a housing of a rotor spinning machine with a grommet according to the invention;
FIG. 2 illustrates a cross-sectional view of the bowl assembly, housing, and grommet of FIG. 1;
FIG. 3 shows a perspective view of a divided grommet according to the first embodiment as shown in FIGS. 1 and 2; and
fig. 4 shows a cross-sectional perspective view of a rotor assembly with a shroud ring according to a second embodiment.
List of reference numerals
1 protective ring
2 front plate segment
3 hub opening
4 spinning rotor shaft
5 spinning rotor
6 bearing unit
7 outer edge
8 first sealing surface
9 ring segment
10 second sealing surface
11 surface of bearing unit
12 locking projection
13 outer edge
14 protective volume
15 air duct
16 protective surface
17 Plastic locking ring
18 recess
19 casing
Detailed Description
The spinning rotor 5 of the rotor spinning machine is rotatably mounted on a spinning rotor shaft 4, wherein the spinning rotor 5 and the spinning rotor shaft 4 are arranged in a housing 19 as shown in fig. 1.
The spinning rotor 5 and the spinning rotor shaft 4 are part of a rotor assembly, wherein the spinning rotor shaft 4 is rotatably mounted to the housing 19 by means of two rolling bearing units 6. Between the spinning rotor 5 and one of the bearing units 6 a guard ring 1 is placed to protect the spinning rotor 5 from the lubricant of the bearing unit 6 and from mechanical damage caused by wear or damage of the bearing unit 6, in particular accelerated particles of the bearing unit 6.
The grommet 1 comprises a front plate segment 2 and a ring segment 9 (see fig. 3). The front plate section 2 is annular and has a hub opening 3 in the center. The hub opening is provided for a protective ring 1 to be placed on a spinning rotor shaft 4, wherein the spinning rotor shaft 4 and the hub opening 3 of the protective ring 1 are circular. In order to allow the spinning rotor shaft 4 to rotate freely relative to the grommet 1 which is firmly mounted to the housing 19, the diameter of the hub opening 3 is about 0.5 mm larger than the diameter of the spinning rotor shaft 4.
The front plate section 2 of the grommet 2 has a rotationally symmetrical shape with a constant radius. The protective surface 16 facing the spinning rotor 5 and the surface of the front plate section 2 on the opposite side facing the bearing unit 6 are flat and closed (see fig. 2). The front plate section 2 also has a flat surface on the outer edge 7(rim), which forms a first sealing surface 8. The first sealing surface 8 contacts a surface of the housing 19 and provides a first seal, in particular for lubricant that escapes from the bearing unit 6.
The ring segment 9 is arranged on the surface of the front plate segment 2 on the side of the shroud ring 1 facing the bearing unit 6. The ring segment 9 extends over approximately 90% of the circumference of the shroud ring 1, wherein the outer diameter of the ring segment 9 is slightly smaller than the outer diameter of the front plate segment 2. An air duct 15 is provided in the ring segment 9, allowing air to flow in and out of a protective volume 14 formed in the shroud ring 1 and delimited by the shroud ring 1 and by the surface 11 of the bearing unit 6 and parts of the housing 19 (see fig. 2). The air duct 15 allows pressure equalization of the protective volume 14 and is important because without such an air duct 15 a negative pressure could form in the grommet 1 during operation of the rotor spinning machine, which would result in a more severe leakage of lubricant from the inside of the bearing unit 6.
At least the surface of the ring segment 9 forms a second sealing surface 10, which can be brought into contact with a surface of the housing 19 in the axial direction of the spinning rotor shaft 4. Between the second sealing surface 10 and the front plate section 2, a locking protrusion 12 is provided, which may interlock with a corresponding surface of the housing 19 to securely mount the grommet 1 to the housing 19.
Fig. 4 shows a second embodiment of the grommet 1. The main difference with the first embodiment is that the shroud ring 1 of the second embodiment is not mounted to the housing 19 close to the bearing unit 6, but completely surrounds the bearing unit 6 with the ring segments 9. Thus, in this embodiment, the bearing unit 6 is not directly mounted to the housing 19, but is mounted to the grommet 1 and to the housing 19 only with the grommet 1.
In order to allow a secure mounting of the grommet 1 to the housing 19 and to ensure a good seal between the grommet 1 and the housing 19, a plastic locking ring 17 is provided in a recess 18 in the surface of the grommet 1 on the outer edge 13 of the ring segment 9. The surface of the plastic locking ring 17 is mostly flush with the adjacent surface of the grommet 1.
The plastic locking ring 17 is arranged to form a seal and to allow screws to be pressed against or even screwed into the material of the locking ring 17 to achieve a particularly secure and well-sealed coupling with the housing 19.
Claims (12)
1. A grommet (1) for a rotor spinning machine, the grommet (1) comprising:
-a front plate section (2), the front plate section (2) having a hub opening (3), the hub opening (3) being for a grommet (1) to be placed on a spinning rotor shaft (4) of the rotor spinning machine between a spinning rotor (5) and a bearing unit (6), wherein,
-the grommet (1) is constructed as a separate component with respect to the spinning rotor (5), the spinning rotor shaft (4) and the bearing unit (6), and wherein,
-the grommet (1) is arranged to protect the spinning rotor (5) from lubricant of the bearing unit (6) and/or from mechanical damage caused by wear or damage of the bearing unit (6),
it is characterized in that the utility model is characterized in that,
the ring segment (9) is arranged coaxially protruding from one side of the front plate segment (2), the ring segment (9) comprises a second sealing surface (10), the second sealing surface (10) is contacted with the surface (11) of the bearing unit (6) and/or the shell (19) of the spinning rotor (5),
wherein the front plate section (2) and the ring section (9) enclose a protective volume (14) within the shroud ring (1) for collecting lubricant and/or particles of the bearing unit (6), the second sealing surface (10) comprising an air duct (15) opening into the protective volume (14) in order to avoid deviations from ambient pressure forming within the protective volume (14).
2. Grommet according to claim 1, characterized in that the front plate section (2) has a circular shape and the hub opening (3) is located in the center of the front plate section (2).
3. Grommet according to claim 1 or 2, characterized in that the outer edge (7) of the front plate section (2) is formed as a first sealing surface (8) to be placed on at least the housing (19).
4. Grommet according to claim 1, characterized in that a locking protrusion (12) is arranged on an outer edge (13) of the ring segment (9) for locking the grommet (1) to at least the housing (19) of the spinning rotor (5), wherein the locking protrusion (12) is arranged over at least 75% of the circumference of the ring segment (9).
5. Grommet according to claim 1, characterized in that the front plate section (2) has a completely closed flat protective surface (16) facing the spinning rotor (5).
6. Grommet according to claim 1, characterized in that the ring segment (9) is provided arranged adjacent to the bearing unit (6) and has a contact seal with a radial surface (11) of the bearing unit (6).
7. Grommet according to claim 1, characterized in that the ring segment (9) is arranged to completely surround one bearing unit (6) in a form-fitting manner.
8. Grommet according to claim 1, characterized in that the ring segment (9) is arranged for holding a bearing unit (6) within the ring segment (9) and is arranged to be mounted with an outer edge (13) to the housing (19).
9. Grommet according to claim 1, characterized in that a plastic locking ring (17) is embedded in a recess (18) flush with the surface of the outer edge (13) of the ring segment (9) in order to allow a precise locking of the grommet (1) to the housing (19) with locking screws.
10. Grommet according to claim 1, characterized in that the diameter of the hub opening (3) is 0.2 mm to 1 mm larger than the diameter of the spinning rotor shaft (4) to be inserted into the hub opening (3) to provide space for damping movements.
11. A spinning box for a rotor spinning machine, comprising at least a spinning rotor (5) arranged on a spinning rotor shaft (4), to which spinning box the spinning rotor shaft (4) is rotatably mounted by means of at least one bearing unit (6), wherein a grommet (1) according to any one of claims 1-10 is arranged on the spinning rotor shaft (4) between the spinning rotor (5) and the bearing unit (6).
12. A rotor spinning machine having at least one spinning box according to claim 11.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19180484.8 | 2019-06-17 | ||
| EP19180484.8A EP3754060A1 (en) | 2019-06-17 | 2019-06-17 | Rotor guard ring for a rotor spinning machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112176468A CN112176468A (en) | 2021-01-05 |
| CN112176468B true CN112176468B (en) | 2021-11-30 |
Family
ID=66912658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010540904.9A Expired - Fee Related CN112176468B (en) | 2019-06-17 | 2020-06-15 | Rotor guard ring for rotor spinning machine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3754060A1 (en) |
| CN (1) | CN112176468B (en) |
| BR (1) | BR102020012096A2 (en) |
| MX (1) | MX2020006345A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4818130B1 (en) * | 1968-09-09 | 1973-06-04 | ||
| JPS4975837A (en) * | 1972-11-29 | 1974-07-22 | ||
| US6095529A (en) * | 1997-07-25 | 2000-08-01 | Novibra Gmbh | Arrangement for sealing an opening of a rotor housing |
| CN2556214Y (en) * | 2001-10-11 | 2003-06-18 | 绍尔捷克股份公司 | Yarn backdrawing device |
| CN201801652U (en) * | 2010-08-12 | 2011-04-20 | 浙江日发纺织机械有限公司 | Positioning mechanism for piecing machine of rotor spinning machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2129840A (en) * | 1982-11-12 | 1984-05-23 | John James Stamp | Open-end spinning rotors |
| CS266602B1 (en) * | 1987-11-19 | 1990-01-12 | Rajsigl Zdenek | Rolling seating for a textile spindle |
| DE10237040B4 (en) * | 2002-08-07 | 2011-08-11 | Wilhelm Stahlecker GmbH, 73326 | Device for sealing an opening of a rotor housing |
-
2019
- 2019-06-17 EP EP19180484.8A patent/EP3754060A1/en not_active Withdrawn
-
2020
- 2020-06-15 CN CN202010540904.9A patent/CN112176468B/en not_active Expired - Fee Related
- 2020-06-16 BR BR102020012096-4A patent/BR102020012096A2/en not_active IP Right Cessation
- 2020-07-13 MX MX2020006345A patent/MX2020006345A/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4818130B1 (en) * | 1968-09-09 | 1973-06-04 | ||
| JPS4975837A (en) * | 1972-11-29 | 1974-07-22 | ||
| US6095529A (en) * | 1997-07-25 | 2000-08-01 | Novibra Gmbh | Arrangement for sealing an opening of a rotor housing |
| CN2556214Y (en) * | 2001-10-11 | 2003-06-18 | 绍尔捷克股份公司 | Yarn backdrawing device |
| CN201801652U (en) * | 2010-08-12 | 2011-04-20 | 浙江日发纺织机械有限公司 | Positioning mechanism for piecing machine of rotor spinning machine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3754060A1 (en) | 2020-12-23 |
| BR102020012096A2 (en) | 2020-12-29 |
| MX2020006345A (en) | 2021-01-08 |
| CN112176468A (en) | 2021-01-05 |
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