System for determining tilt angle of shaft seal ring
By using transparent discs, tubes and annular grooves in the shaft seal ring system, and using crosshairs and markings, the problem of tilt angle identification and correction of the shaft seal ring is solved, and the correct installation and service life of the shaft seal ring is achieved. extend.
Patent Information
- Application Number
- CN202420350816.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-02-26
AI Technical Summary
The prior art is difficult to effectively determine and correct the inclination angle of the shaft seal ring, which affects its service life and sealing performance.
A system for checking the mounting position of the shaft seal ring is designed, including transparent discs, tubes and annular grooves, which can visually identify the inclination angle of the shaft seal ring to ensure its correct installation and orientation through crosshairs and markings.
The axle seal ring tilt angle is achieved quickly and accurately identify and correct, extending its service life and improving sealing performance.
Smart Images
Figure CN222188153U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a system for determining the inclination angle of a shaft sealing ring. Background Art
[0002] As is known, shaft sealing rings are provided for sealing a rotatably mounted shaft. Utility Model Content
[0003] Therefore, the purpose of the utility model is to ensure the service life of the shaft sealing ring.
[0004] According to the invention, this object is achieved by a system for determining the tilt angle of a shaft sealing ring having the following features.
[0005] The important feature of the system for determining the tilt angle of a shaft sealing ring according to the utility model is that the system comprises a bearing, a shaft sealing ring, a housing part and an inspection device for inspecting the installation position of the shaft sealing ring, a shaft, in particular a rotor shaft of an electric motor of the system,
[0006] wherein the shaft is supported rotatably relative to the housing part by means of a bearing, in particular wherein the bearing is received in the housing part,
[0007] wherein the shaft sealing ring is received in the housing part and seals against the shaft, in particular wherein a sealing lip of the shaft sealing ring seals against the shaft,
[0008] The inspection device comprises a tube, the opening of which, facing away from the shaft sealing ring in the axial direction, is covered by a transparent disk, which has a first marking, in particular a first crosshair.
[0009] The shaft sealing ring has an annular groove which circumferentially extends uninterruptedly, in particular in the circumferential direction, into which the pipe is inserted.
[0010] In this case, the axial end region of the shaft projects into the tube.
[0011] The advantage here is that the correct installation of the shaft sealing ring can be checked in a simple manner. The tube only has to be inserted into the annular groove of the shaft sealing ring and then the viewing direction is aligned with the intersection of the crosshairs. If the deviation of the radial center of the shaft end face exceeds the permissible level, this deviation can be detected. In this way, tilted installation of the shaft sealing ring can be detected and repairs can therefore be initiated.
[0012] In an advantageous design, the first marking is arranged on a side of the disk facing away from the shaft sealing ring, specifically, in particular, on the upper side. This has the advantage that the first marking can be easily identified.
[0013] In an advantageous embodiment, the marking, in particular the intersection of the crosshairs, is arranged centrally on the disk, in particular a circular disk. This has the advantage that the disk can be designed as a circular disk and inserted into a circular receiving opening of the tube so that the circular disk is precisely oriented relative to the tube, i.e. the rotational symmetry axis of the circular disk is coaxial with the rotational symmetry axis of the tube.
[0014] In an advantageous embodiment, the visually recognizable marking, in particular the centering hole, is arranged centrally on the end face of the shaft, in particular on the axis of rotation of the shaft. This has the advantage that the radial center can be represented and / or easily recognizable by the center point of the marking, in particular the centering hole. Thus, the deviation, in particular the distance, between the crosshairs crossing point in the viewing direction and the center point of the end face of the shaft, i.e. the center point of the marking, can be easily recognized.
[0015] In an advantageous design, the pipe with its end face facing the shaft sealing ring, in particular directly and flatly, abuts against the groove bottom of the annular groove. The advantage here is that, by the flat abutment, the rotational symmetry axis of the pipe is coaxial with the ring axis of the shaft sealing ring.
[0016] In an advantageous embodiment, the tube is hollow cylindrical or has an inner opening which is stepped in the axial direction, in particular has a stepped bore.
[0017] In particular, the clear inner diameter of the tube increases monotonically with decreasing distance from the shaft sealing ring. This has the advantage that rotor shafts of different thicknesses can be inserted into the tube, although these can only be inserted to different depths in the axial direction. The tube can thus be used for rotor shafts of different sizes.
[0018] In an advantageous embodiment, the outer circumference of the tube is the outer circumference of a vertical cylinder. Advantageously, the rotational symmetry axis of the tube is parallel to the ring axis of the shaft sealing ring.
[0019] In an advantageous embodiment, the end side, in particular the axial end side, of the shaft is arranged as the surface area of the shaft which is closest to the disk. This has the advantage that the shaft can be positioned as close as possible to the disk and has a well-identifiable radial center, i.e., a center point, as the shaft end. Deviations due to tilting of the shaft sealing ring can thus be reliably and clearly identified.
[0020] In an advantageous embodiment, the radial center of the end side of the shaft, in particular the axial end side, has a particularly visually recognizable marking. The advantage here is that the distance or deviation between the rotational symmetry axis of the tube and the radial center can be easily recognized.
[0021] In an advantageous embodiment, the marking is a centering hole which is in particular designed as a blind hole.
[0022] In particular, the centering hole is formed centrally in the end face of the shaft. The advantage here is that the marking can be produced simply and cost-effectively with high precision.
[0023] In an advantageous embodiment, a first crosshair is implemented on the disk, in particular on the side of the disk facing away from the shaft sealing ring. This has the advantage that a simple and cost-effective solution is achieved.
[0024] In an advantageous design, a second crosshair is implemented on the disk, especially on the side of the disk facing the shaft sealing ring. Advantageously, the straight line connecting the two intersection points of the crosshairs is coaxial with the rotational symmetry axis of the tube and / or the ring axis of the shaft sealing ring.
[0025] In an advantageous embodiment, the tube has an axis of rotational symmetry which is aligned with the ring axis of the shaft sealing ring.
[0026] In particular, by determining the deviation of the radial center of the end face of the shaft from the line connecting the two intersection points of the crosshairs, the inclination of the ring axis of the shaft sealing ring from the line connecting the two intersection points can be determined visually. This has the advantage that the tube and the shaft sealing ring are precisely aligned, so that the deviation of the radial center of the shaft from the rotational symmetry axis of the tube can be easily and clearly identified.
[0027] In an advantageous embodiment, the intersection of the two crosshairs is arranged on the rotational symmetry axis of the tube. The advantage here is that the deviation, i.e. the distance, of the radial center of the shaft, i.e., the center of the end side of the shaft, from the straight line connecting the two crosshairs can be quickly and easily identified.
[0028] In an advantageous design, the outer circumference of the pipe is designed as a cylinder, in particular as the circumference of a cylinder, which has two diametrically opposed flattened portions at one of its end faces. The advantage here is that high torques can be introduced into the pipe by means of a tool.
[0029] In an advantageous embodiment, the centering hole has a conical region. The advantage here is that the centering hole center as the radial center of the shaft can be visually identified very well.
[0030] An important feature of the method for determining the tilt angle of a shaft sealing ring of a system is that the tilt angle between the ring axis of the shaft sealing ring and the rotational axis of the shaft is determined by identifying and / or determining the deviation or distance between the radial center of the shaft end side and / or a marking arranged at the shaft end side and the connecting line between the intersection points of two cross lines.
[0031] The advantage here is that the observer can adjust the viewing direction so that the intersection points of the two crosshairs are arranged exactly one after the other in the viewing direction, that is, on the same straight line. The deviation of the radial center from the straight line can therefore be identified. In particular, it can be determined whether the permissible degree of deviation is exceeded, so that the ring axis of the shaft sealing ring has an inadmissibly large tilt angle relative to the line or the viewing direction. The orientation of the tube relative to the shaft sealing ring can be implemented very accurately, because the tube, in particular flatly, abuts against the groove bottom of the uninterruptedly surrounding annular groove of the shaft sealing ring. The ring axis of the annular groove is coaxial with the ring axis of the shaft sealing ring. The disc is implemented as a circular disc, wherein the - in particular continuous - rotational symmetry axis of the disc is also coaxial with the ring axis of the shaft sealing ring. Therefore, the tilt angle can be determined very simply, quickly and accurately.
[0032] The utility model is not limited to the above-mentioned feature combination. For those skilled in the art, in particular, other reasonable combinations of the above-mentioned feature combination and / or individual features and / or features to be described below and / or features of the accompanying drawings can be obtained from the purpose proposed and / or the purpose proposed by comparison with the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Now further illustrate the utility model with the help of schematic diagram:
[0034] exist Figure 1 Detailed description of the drawings shows a cross-sectional view of an inspection device for inspecting the installation position of a shaft sealing ring.
[0035] exist Figure 2 A perspective oblique view of the inspection device is shown in FIG.
[0036] exist Figure 3 A plan view of the inspection device is shown in FIG.
[0037] exist Figure 4 A cross-sectional view of an inspection device used in a bearing assembly is shown in FIG.
[0038] List of reference numerals:
[0039] 1 tube
[0040] 2 Transparent discs
[0041] 3 steps
[0042] 4 End faces, especially torus faces
[0043] 20 Crosshairs
[0044] 30 Flattened part
[0045] 40 Annular groove with U-shaped cross section
[0046] 41 Bearing cap
[0047] 42 Shaft sealing ring
[0048] 43 Rotor shaft DETAILED DESCRIPTION
[0049] As shown in the figures, the inspection device has a tube 1, the first opening of which, in particular the opening facing away from the shaft sealing ring 42 in the axial direction, is covered by a transparent disk 2. The disk is preferably made of plastic or glass.
[0050] In particular, a crosshair 20 is arranged on the upper side of the disk 2 and another crosshair is arranged on the lower side of the disk 2 .
[0051] Preferably, the tube 1 has a stepped bore on its inner side, the stepped bore having at least one step 3 .
[0052] The bearing assembly has a bearing cover 41 which belongs to the housing of the electric machine and receives a shaft sealing ring 42 which seals against a rotor shaft 43 .
[0053] In this case, the sealing lip of the shaft sealing ring 42 contacts the rotor shaft 43 .
[0054] The rotor shaft 43 is rotatably supported, wherein a first bearing for rotatably supporting the rotor shaft 43 is received in the bearing cover 41, and a second bearing for rotatably supporting the rotor shaft 43 is received in a bearing flange of the motor housing. Here, the bearing flange is connected to the stator housing, which is connected to the stator housing at its side facing away from the bearing flange in the axial direction.
[0055] The axial direction is parallel to the rotational axis of the rotor shaft 43. The radial direction is referenced to the rotational axis of the rotor shaft, and the circumferential direction is likewise referenced to the rotational axis of the rotor shaft.
[0056] The ring axis of the shaft sealing ring should ideally be coaxial with the axis of rotation of the rotor shaft 43. However, manufacturing-related deviations can also occur which lead to non-zero tilt angles.
[0057] In order to determine whether the tilt angle exceeds the allowable degree, the annular bottom surface of the tube 1 is inserted into the annular groove 40 of the shaft sealing ring 42. Preferably, the annular groove 40 has a U-shaped cross section into which the tube 1 can be inserted together.
[0058] Advantageously, the end face of the pipe 1 facing the shaft sealing ring 42 bears against the groove bottom of the annular groove 40 of the shaft sealing ring 42 over all four sides.
[0059] The rotor shaft 43 projects into the tube 1 .
[0060] The end face of the rotor shaft 43 facing the disk 2 can be seen through the disk 2. This end face has a circular radial outer edge and a centering hole, which represents the radial center position on the end face of the rotor shaft 43.
[0061] Thus, when the shaft sealing ring is correctly oriented, if the observer observes the disk 2 in the direction of the rotation axis of the rotor shaft 43, the intersection of the crosshairs 20 arranged on the upper side, i.e., facing the front side of the observer, is arranged just in front of the radial center of the end face of the rotor shaft 43. This is the case when the ring axis of the shaft sealing ring 42 is coaxial with the rotation axis of the rotor shaft 43.
[0062] The crosshairs 20 applied to the disk thus appear aligned with the center of the end face of the rotor shaft 43 .
[0063] In order to orient the observer's viewing direction as accurately as possible, the disk 2 also has another crosshair on its lower side, that is, on the rear side of the disk 2 as seen from the observer, so that the observer can make the positions of the two crosshairs 20 overlap by moving his actual position relative to the disk 2.
[0064] After the positional superposition, ie after the observer has been aligned relative to disk 2 , the observer can recognize a deviation in the radial center position of the end face and thus detect an incorrect positioning of shaft sealing ring 42 .
[0065] The shaft sealing ring 42 is designed as a rotating body. The shaft sealing ring has continuous rotational symmetry with respect to its rotational symmetry axis, which is only tilted at an inclination angle with respect to the rotation axis of the rotor shaft. Therefore, the ring axis of the annular groove is coaxial with the rotational symmetry axis of the shaft sealing ring 42.
[0066] The outer circumference of the tube 1 is designed as a cylinder, in particular as the circumferential surface of a cylinder, wherein one of the end surfaces of the cylinder has two diametrically opposite flattened portions 30 .
[0067] The flattened portion 30 enables a simple rotational movement of the tube 1 by placing a tool at the flattened portion 30. In this way, insertion into the annular groove is facilitated and simplified by additionally rotating the tube 1 while inserting it. In particular, it is thus ensured that the tube 1 lies flat against the groove bottom of the annular groove of the shaft sealing ring 42.
[0068] In particular, the U-shaped cross section of the annular groove 40 enables the pipe 1 to be flatly in contact with the shaft sealing ring 42. Here, not only the annular surface of the end side of the pipe 1 facing the shaft sealing ring 42 directly and flatly in contact with the groove bottom of the annular groove 40 of the shaft sealing ring 42, but also the radial inner and outer circumferential surfaces of the hollow cylindrical pipe 1 directly and flatly in contact with the groove bottom of the annular groove 40 of the shaft sealing ring 42.
[0069] The disk 2 is made of a transparent material.
[0070] The stepped bore enables the tube 1 to be used for rotor shafts with different diameters. By way of example, a rotor shaft which is thinner in the axial end region, i.e. a rotor shaft having a first outer diameter in the axial end region, extends in front of the disk 2, while a second rotor shaft having a second outer diameter in the axial end region extends in front of the first step of the stepped bore, wherein the second outer diameter is greater than the first outer diameter and / or greater than the smallest clear inner diameter at the first step of the tube 1, i.e. the first clear inner diameter.
[0071] The further step, whose smallest clear inner diameter is greater than the first clear inner diameter, enables the rotor shaft 43 to be inserted into the tube 1 , which has an outer diameter in its axial end region that is greater than the smallest inner diameter of the further step.
[0072] In other exemplary embodiments according to the invention, the tube 1 is not designed with a stepped bore, but rather with a bore having only a single bore diameter.
[0073] In other embodiments of the invention, at least one lens is arranged on step 3. Thus, the end face of the rotor shaft facing away from disk 2 and thus also the deviation of the radial center from the intersection of crosshairs 20 can be visually recognized in an enlarged manner.
Claims
1. A system for determining the tilt angle of a shaft sealing ring, the system comprising a bearing, a shaft sealing ring, a housing part, a checking device for checking the installation position of the shaft sealing ring and a shaft of an electric motor of the system, The shaft is supported rotatably relative to the housing part by means of a bearing, which is received in the housing part. The shaft sealing ring is received in the housing part and seals toward the shaft, and the sealing lip of the shaft sealing ring seals toward the shaft. It is characterized in that The inspection device comprises a tube, an opening of which, axially facing away from the shaft sealing ring, is covered by a transparent disk, which has a first marking. The shaft sealing ring has an annular groove which runs around uninterruptedly in the circumferential direction, into which the pipe is inserted, and into which the axial end region of the shaft projects.
2. The system for determining the tilt angle of a shaft sealing ring according to claim 1, It is characterized in that The shaft of the electric machine of the system is the rotor shaft.
3. The system for determining the tilt angle of a shaft sealing ring according to claim 1, It is characterized in that The first marking is a first crosshair.
4. The system for determining the tilt angle of a shaft sealing ring according to any one of claims 1 to 3, It is characterized in that The first marking is arranged on the side of the disk facing away from the shaft sealing ring.
5. System for determining the tilt angle of a shaft sealing ring according to claim 4, It is characterized in that The first marking is arranged on the upper side of the disk.
6. System for determining the tilt angle of a shaft sealing ring according to any one of claims 1 to 3, It is characterized in that The first marking is arranged centrally on the disk and / or the visually recognizable marking is arranged centrally on the end face of the shaft.
7. System for determining the tilt angle of a shaft sealing ring according to claim 6, It is characterized in that The intersection point of the first crosshairs as the first marking is arranged centrally on the disk.
8. The system for determining the tilt angle of a shaft sealing ring according to claim 6, It is characterized in that The disk is a circular disk.
9. The system for determining the tilt angle of a shaft sealing ring according to claim 6, It is characterized in that The visually identifiable mark is the centering hole.
10. The system for determining the tilt angle of a shaft sealing ring according to claim 6, It is characterized in that The visually recognizable marking is arranged on the axis of rotation of the shaft.
11. System for determining the tilt angle of a shaft sealing ring according to any one of claims 1 to 3, It is characterized in that The end face of the tube facing the shaft sealing ring lies against the groove bottom of the annular groove.
12. System for determining the tilt angle of a shaft sealing ring according to claim 11, It is characterized in that The end face of the tube facing the shaft sealing ring lies directly and flatly against the groove bottom of the annular groove.
13. System for determining the tilt angle of a shaft sealing ring according to any one of claims 1 to 3, It is characterized in that The tube is hollow cylindrical, or the tube has an internal opening that is stepped in the axial direction, and / or the outer peripheral portion of the tube is the outer peripheral portion of a vertical cylinder.
14. System for determining the tilt angle of a shaft sealing ring according to claim 13, It is characterized in that The clear inner diameter of the tube increases monotonically with decreasing distance from the shaft sealing ring.
15. The system for determining the tilt angle of a shaft sealing ring according to claim 13, It is characterized in that The inner opening is a stepped hole.
16. System for determining the tilt angle of a shaft sealing ring according to any one of claims 1 to 3, It is characterized in that The axial end face of the shaft is arranged as the surface region of the shaft which is closest to the disk.
17. The system for determining the tilt angle of a shaft sealing ring according to claim 6, It is characterized in that The visually recognizable mark is located at the radial center of the axial end side of the shaft.
18. System for determining the tilt angle of a shaft sealing ring according to claim 17, It is characterized in that The marking is a centering hole which is designed as a blind hole and is formed centrally in the end face of the shaft.
19. The system for determining the tilt angle of a shaft sealing ring according to claim 4, It is characterized in that A first crosshair is arranged as a first marking on the side of the disk facing away from the shaft sealing ring.
20. The system for determining the tilt angle of a shaft sealing ring according to claim 19, It is characterized in that A second crosshair is implemented on the side of the disk facing the sealing ring.
21. The system for determining the tilt angle of a shaft sealing ring according to claim 20, It is characterized in that The tube has a rotational symmetry axis which is aligned with the ring axis of the shaft sealing ring, and by determining the deviation of the radial center of the end side of the shaft relative to the line connecting the intersection points of the first cross line and the second cross line, the inclination of the ring axis of the shaft sealing ring relative to the line connecting the two intersection points can be visually determined.
22. The system for determining the tilt angle of a shaft sealing ring according to claim 20, It is characterized in that The intersection point of the first cross line and the second cross line is arranged on the rotational symmetry axis of the tube.
23. The system for determining the tilt angle of a shaft sealing ring according to claim 21, It is characterized in that The outer circumference of the tube is designed as a cylinder having two diametrically opposite flattened portions on one of its end faces.
24. The system for determining the tilt angle of a shaft sealing ring according to claim 23, It is characterized in that The outer circumference of the tube is designed as the circumference of a cylinder.
25. The system for determining the tilt angle of a shaft sealing ring according to claim 18, It is characterized in that The centering hole has a tapered region.