Abstract
A support disk for a suspension for a spinning rotor (2) of an open-end spinning device features a base body (8) and a thrust ring (9) with a running surface (10) attached on an outer circumference of the base body (8), whereas the running surface (10) has a crowned outer contour in the axial section. The running surface (10) features at least two partial sections (11), between which at least one groove-shaped recess (12, 14, 16) is formed. A suspension for a spinning rotor (2) of an open-end spinning device contains support disks (3) arranged in pairs forming a wedge slit, whereas the spinning rotor (2) can be mounted with its shaft (1) in the wedge slit, and whereas at least one of the support disks (3) is formed as described above.
Claims
1. Support disk for a suspension for a spinning rotor (2) of an open-end spinning device, whereas the support disk (3) features a base body (8) and a thrust ring (9) with a running surface (10) attached on an outer circumference of the base body (8), whereas the running surface (10) has a crowned outer contour in the axial section, characterized in that the running surface (10) features at least two partial sections (11), between which at least one groove-shaped recess (12, 14, 16) is formed.
2-12. (canceled)
Description
[0022] Further advantages of the invention are described in the following embodiments. The following is shown:
[0023] FIG. 1 a side view of a spinning rotor of an open-end spinning device together with a suspension,
[0024] FIG. 2a a broken away, schematic sectional view of an embodiment of a support disk,
[0025] FIG. 2b a broken away, schematic sectional view of an additional embodiment of a support disk,
[0026] FIG. 3a a broken away, schematic sectional view of an additional embodiment of a support disk, and
[0027] FIG. 3b a broken away, schematic sectional view of an additional embodiment of a support disk.
[0028] As shown in FIG. 1, the shaft 1 of a spinning rotor 2 of an open-end spinning device is located in wedge slits formed by support disks 3. Thereby, the support disks 3 are mounted on both sides of the shaft 1, in each case with common axes 4 in a bearing block 5. The axes 4 are inclined against each other and against the shaft 1 such that a tangential belt 6 driving the shaft 1 exerts on the shaft 1 an axial thrust in the direction of a pivot bearing 7. The particular formation of the running surface 10 of the support disks 3 is only indicated in this figure, and is shown in more detail in the following figures. Thereby, in order to improve clarity, the crowned outer contour in the axial section is shown in an exaggerated manner.
[0029] FIG. 2a shows a cross-section of a first embodiment of a support disk 3. A thrust ring 9 with a running surface 10 is attached to the base body 8. The running surface 10 has a crowned outer contour in the axial section, such that, in an advantageous manner, a contact of the running surface 10 with the rotor shaft 1 in a central area of the running surface 10 is formed, from which the heat that arises can be evenly distributed.
[0030] In addition, the thrust ring 9 features a V-shaped groove 12, which divides the running surface 10 into two partial sections 11a, 11b. Thereby, the groove 12 increases the surface of the running surface 10 and thus improves cooling. At the same time, on the basis of the groove 12, in an advantageous manner, two contact points with the shaft 1 and thus an increased contact surface arise, which leads to a more uniform heat load and a more uniform wear of the running surface 10. Thereby, the groove base 13 of the groove 12 is rounded in a concave manner, in order to prevent the formation of cracks in the thrust ring 9.
[0031] The support disk 3 preferably features a width B between 6.5 mm and 7.5 mm, which also contributes to a low heat load of the running coating. In addition, with the shown embodiment, each of the two partial sections 11a, 11b features the same width b.
[0032] The two partial sections 11a, 11b of the support disk 3 of FIG. 3a feature a common crowned outer contour with a radius of curvature. Thereby, the radius of curvature advantageously amounts to approximately 10 times the width B of the support disk 3.
[0033] With the following descriptions of the alternative embodiments shown in FIGS. 2b, 3a and 3b, the same reference signs are used for characteristics that are identical and/or at least comparable in their structure and/or mode of action compared to the first embodiment shown in FIG. 2a. To the extent that they are not explained once again in detail, their structure and/or mode of action correspond to the structure and/or mode of action of the characteristics already described above.
[0034] With the embodiment shown in FIG. 2b, each of the two partial sections 11a, 11b of the running surface 10 features a crowned outer contour for itself. As a result, completely without a separate groove, a groove-shaped recess 14 arises. Here as well, the groove-shaped recess 14 causes an enlargement of the surface of the running surface 10 and thus improved cooling. Based on the crowned outer contour of each of the two partial sections 11a, 11b for itself, in turn, an advantageous, increased contact surface with a uniform heat distribution and more uniform wear arises.
[0035] Here as well, the crowned outer contours of the two partial sections 11a, 11b feature a radius of curvature. Thereby, the radius of curvature of each of the two crowned outer contours advantageously amounts to approximately 1.3 to 1.5 times the width B of the support disk 3. However, in deviation from the presentation shown here, it is also possible to provide each of the outer contours of the two partial sections 11a, 11b with different radii of curvature.
[0036] FIG. 3a now shows a support disk 3, with which the running surface 10 formed by the partial sections 11 is inclined relative to the axis 4 of the support disk 3. Thereby, even with a stronger set suspension, a contact point or a contact surface between the running surface 10 and the shaft 1 of the spinning rotor 2 in the area of the center of the running surface 10 can be also achieved. In addition, this embodiment features a V-shaped groove 12, the groove base 13 of which is rounded in a concave manner, and convexly rounded transitions 15a, 15b between the running surface 10 and the groove 12. Such convexly rounded transitions 15a, 15b are preferable to sharp edges, since a selective wear at the sharp edges is thereby reduced.
[0037] As the last embodiment, FIG. 3b shows a support disk 3 with a thrust ring 9, the running surface 10 of which features two partial sections 11a, 11b, each of which is provided with a crowned outer contour for itself. Thereby, unlike the embodiment of FIG. 2b, the outer contours of the two partial sections 11a, 11b feature heights different from each other. Thereby, in contrast to outer contours of the same height, the contact points for the shaft 1 of the spinning rotor 2 are distributed uniformly strongly on the two partial sections 11a, 11b, which distribute both the heat load and the wear more evenly on the partial sections 11a, 11b. In this embodiment, the thrust ring 9 also features a rectangular groove 16. In contrast to a V-shaped groove, the rectangular groove 16 is less robust, but features a greater surface area and thus improved cooling properties.
[0038] This invention is not limited to the illustrated and described embodiments. Variations within the scope of the claims, just as the combination of characteristics, are possible, even if they are illustrated and described in different embodiments.
LIST OF REFERENCE SIGNS
[0039] 1 Shaft [0040] 2 Spinning rotor [0041] 3 Support disk [0042] 4 Axis [0043] 5 Bearing block [0044] 6 Tangential belt [0045] 7 Pivot bearing [0046] 8 Base body [0047] 9 Thrust ring [0048] 10 Running surface [0049] 11 Partial sections of the running surface [0050] 12 V-shaped groove [0051] 13 Groove base [0052] 14 Groove-shaped recess [0053] 15 Transition between running surface and groove [0054] 16 Rectangular groove [0055] B Width of the support disk [0056] b Width of the partial section [0057] H Height of the outer contour of a partial section
