Labyrinth seal structure between coupling hub and butt joint equipment end cover
By installing a labyrinth seal ring on the outer end of the coupling hub that matches the rotating seal of the end cover of the docking equipment, the problem of insufficient sealing between the coupling and the docking equipment is solved, achieving efficient dirt protection and extending the service life of the equipment. extend.
Patent Information
- Application Number
- CN202421266033.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-04
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-06-04
AI Technical Summary
In existing rail vehicles, the gap between the coupling hub and the end cover of the docking equipment causes external dirt to enter the inside of the gearbox, contaminating lubricating oil and affecting service life.
The outer end of the hub of the coupling is fixed with a labyrinth seal ring that rotates and seals with the outer surface of the docking equipment end cover to form an efficient sealing structure.
Significantly improves the sealing between the coupling hub end face and the end cover of the docking equipment, effectively reducing or eliminating the phenomenon of external dirt entering the docking equipment, ensuring efficient cleanliness inside the equipment and extending its service life.
Smart Images
Figure CN222377229U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rail vehicle sealing structures, in particular to a labyrinth sealing structure between a coupling hub and an end cover of a docking device. Background Art
[0002] The gearbox is a key component of the bogie in rail vehicles. It plays the role of transmitting the motor torque and speed and driving the wheels. The motor and the input shaft of the gearbox are generally connected through a coupling to transmit torque and speed. The input shaft is supported on the gearbox body through bearings. At the same time, a bearing seat is provided on the gearbox body. The inner and outer ends of the bearing are respectively matched with the input shaft and the bearing seat. Lubricating oil is provided in the gearbox body to lubricate the various moving parts in the gearbox. In order to prevent the leakage of lubricating oil, the input shaft needs to be sealed.
[0003] like Figures 1-2 As shown in the figure, an assembly relationship between a gearbox and a coupling is provided. Since the gearbox B and the coupling A are two separate products, which are generally designed by different manufacturers, there is a certain gap between the hub end face of the coupling A and the gearbox end cover, and between the hub end face of the coupling A and the motor end cover after assembly. Since the gearbox mostly adopts a non-contact labyrinth seal structure, that is, there is an axial and radial gap between the labyrinth static ring and the labyrinth dynamic ring that are sleeved on the outer circumference of the gearbox input shaft and cooperate with each other, therefore, external rainwater, cleaning agents, mist, dust and other dirt will enter the gearbox through the gap between the gearbox end cover and the input shaft, and the axial and radial gaps between the labyrinth static ring and the labyrinth dynamic ring that are cooperated with each other on the outer circumference of the gearbox input shaft, causing the lubricating oil in the gearbox to be contaminated or emulsified, thereby affecting the service life of the gearbox. To this end, the utility model proposes a labyrinth seal structure between the coupling hub and the end cover of the docking device, in order to improve the sealing between the end face of the coupling hub and the end cover of the docking device and solve the problem of contamination by dirt that easily enters the interior of the docking device. Summary of the invention
[0004] The purpose of the utility model is to overcome the defects existing in the prior art and provide a labyrinth sealing structure between the hub of a coupling and the end cover of a docking device, by fixing a labyrinth sealing ring on the outer end of the hub of the coupling and rotatingly sealing with the outer side surface of the end cover of the docking device, thereby significantly improving the sealing of the docking position between the end face of the hub of the coupling and the end cover of the docking device, and effectively reducing or eliminating the phenomenon that external rainwater, cleaning agents, mist, dust and other dirt enter the interior of the docking device through the gap between the center hole of the end cover of the docking device and the center axis, thereby ensuring that the interior of the docking device has long-lasting high-efficiency cleaning performance, thereby helping to ensure that the docking device has long-lasting excellent working performance and helping to extend the service life of the docking device.
[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is to design a labyrinth sealing structure between the coupling hub and the end cover of the docking device, including a coupling and an end cover of the docking device, a labyrinth sealing ring is fixedly provided at the outer end of the coupling hub, and the labyrinth sealing ring is rotationally sealed with the outer side surface of the end cover of the docking device.
[0006] The labyrinth sealing structure between the coupling hub and the end cover of the docking device of the utility model significantly improves the sealing performance of the docking position between the hub end face of the coupling and the end cover of the docking device by fixing a labyrinth sealing ring on the outer end of the hub of the coupling and rotatingly sealing with the outer side surface of the end cover of the docking device, and effectively reduces or eliminates the phenomenon that external rainwater, cleaning agents, mist, dust and other dirt enter the interior of the docking device through the gap between the center hole of the end cover of the docking device and the center axis, ensuring that the interior of the docking device has long-lasting high-efficiency cleaning performance, thereby helping to ensure that the docking device has long-lasting excellent working performance and helping to extend the service life of the docking device.
[0007] The preferred technical solution is that the outer periphery of the labyrinth sealing ring is provided with an annular eaves body three extending toward one side of the end cover of the docking device, the inner end edge position of the labyrinth sealing ring or the outer end face of the hub is provided with an annular groove opening toward the end cover of the docking device, the outer side face of the end cover of the docking device is coaxially spaced from the outside to the inside with annular eaves body one and annular eaves body two extending toward the outer periphery, and the cross-sections of the annular eaves body one and the annular eaves body two are both special-shaped L-shaped structures, the annular eaves body one and the outer side face of the end cover of the docking device are combined to form an annular groove one opening toward the outside, the annular eaves body two and the outer side face of the end cover of the docking device are combined to form an annular groove two opening toward the outside, the outer peripheral edge surface of the annular eaves body one is rotationally sealed with the inner peripheral side surface of the annular eaves body three, the outer peripheral edge surface of the annular eaves body two extends into the interior of the annular groove and rotationally seals with the outer end edge of the inner wall of the annular groove. The outer peripheral edge surface of the annular eaves body 1 and the inner peripheral side surface of the annular eaves body 3 are rotated and sealed, and the annular eaves body 1 and the outer side surface of the end cover of the docking equipment are enclosed to form an annular groove 1 with an opening facing outward, thereby forming a labyrinth sealing structure located on the outer peripheral side. External water vapor, rainwater, dust and other dirt are first collected in the annular groove 1, and most of the dirt is thrown out under the centrifugal action of the high-speed rotation of the labyrinth sealing ring. The small part of liquid dirt that has not been discharged will be collected on the lower side of the annular groove under the action of its own gravity and flow downward; the annular eaves body The second outer peripheral surface extends into the annular groove and cooperates with the outer end edge of the inner wall of the annular groove for rotational sealing. The annular eaves body 2 and the outer side surface of the end cover of the docking device are combined to form an annular groove 2 with an opening facing outward, thereby forming a first labyrinth sealing structure located on the inner side. A very small part of the dirt entering the annular groove 2 will be gathered on the lower side of the annular groove 2 under the action of its own gravity and flow downward into the annular groove 1, thereby greatly reducing the probability of dirt entering the docking device through the gap between the center hole of the end cover of the docking device and the center axis.
[0008] A further preferred technical solution is that the annular groove is located at the inner end edge of the labyrinth sealing ring, the inner end edge of the labyrinth sealing ring forms an annular eaves body four facing the end cover of the docking device, the inner end edge of the labyrinth sealing ring is also provided with a plurality of mounting through holes annularly spaced and distributed at the bottom of the annular groove, a plurality of threaded blind holes are annularly spaced and provided on the outer end face of the hub, the labyrinth sealing ring is fixedly connected with the threaded blind holes on the outer end face of the hub by screws passing through the inside of the mounting through holes, and the outer end edge surface of the annular eaves body four is pressed against the outer side surface of the partition ring located on the inner peripheral side of the end cover of the docking device, the outer side surfaces of the labyrinth sealing ring, the annular eaves body three and the end cover of the docking device enclose and form an annular cavity that is connected with the annular groove two. The outer end edge surface of the annular eaves body four is pressed against the outer side surface of the spacer ring located on the inner circumference side of the end cover of the docking device, and cooperates with the annular groove to form a second labyrinth sealing structure located on the inner side. A very small part of the dirt entering the annular groove will be gathered on the lower side of the annular groove under the action of its own gravity and flow downward into the annular groove two, thereby further reducing the probability of dirt entering the docking device through the gap between the center hole of the end cover of the docking device and the center axis, and realizing a three-layer labyrinth sealing protection structure as a whole, ensuring the efficient sealing of the docking position between the hub end face of the coupling and the end cover of the docking device.
[0009] A further preferred technical solution is that the middle part of the labyrinth seal ring is also provided with an annular eaves body 5 extending toward the outer peripheral side, the annular eaves body 5 is correspondingly located at the outer side end of the outer peripheral side wall of the annular groove, and the outer edge of the annular eaves body 5 is set as an inclined surface structure with a low end facing the end cover of the docking device. The annular eaves body 5 blocks the dirt entering the annular cavity, helps the dirt to gather and flow to the lower side of the annular cavity, which is more conducive to the discharge of the dirt; the outer edge of the annular eaves body 5 is set as an inclined surface structure with a low end facing the end cover of the docking device, and under the centrifugal force of the high-speed rotation of the labyrinth seal ring, the inclined surface structure is more conducive to the dirt gathered in the annular groove 2 to gather into the annular cavity.
[0010] A further preferred technical solution is that the annular groove is located on the outer end face of the wheel hub, the inner end edge of the labyrinth sealing ring forms an annular eaves body four facing the end cover of the docking device, the labyrinth sealing ring is interference fit on the outer end face of the wheel hub through the annular eaves body four, the labyrinth sealing ring, annular eaves body three, annular eaves body four, the outer side surface of the end cover of the docking device and the outer end face of the wheel hub together form an annular cavity that is interconnected with the annular groove two, and the part of the outer end face of the wheel hub located on the inner circumferential side of the annular groove is pressed against the outer side face of the spacer ring located on the inner circumferential side of the end cover of the docking device. The part of the outer end face of the hub located on the inner circumference of the annular groove is pressed against the outer side face of the spacer ring located on the inner circumference of the end cover of the docking device, and cooperates with the annular groove to form a second labyrinth sealing structure located on the inner side. A very small part of the dirt entering the inside of the annular groove will be gathered on the lower side of the annular groove under the action of its own gravity and flow downward into the inside of the second annular groove, thereby further reducing the probability of dirt entering the inside of the docking device through the gap between the center hole of the end cover of the docking device and the center axis, and realizing a three-layer labyrinth sealing protection structure as a whole, ensuring efficient sealing of the docking position between the hub end face of the coupling and the end cover of the docking device; the structural design and installation method of the labyrinth sealing ring are relatively simple, thereby ensuring that the labyrinth sealing structure between the coupling hub and the gear box end cover of the utility model can be smoothly prepared and implemented.
[0011] A further preferred technical solution is that the end cover of the docking device is a gearbox end cover located on the input side of the gearbox or a motor end cover located on the output side of the motor. The labyrinth seal structure between the coupling hub and the gearbox end cover of the utility model is universal and highly practical, and is applicable between the coupling and the motor end cover, and between the coupling and the gearbox end cover.
[0012] A further preferred technical solution is that the coupling is one of a drum gear coupling, a diaphragm disc coupling or a flexible plate coupling.
[0013] The advantages and beneficial effects of the utility model are:
[0014] 1. The labyrinth sealing structure between the coupling hub and the end cover of the docking device of the utility model significantly improves the sealing performance of the docking position between the hub end face of the coupling and the end cover of the docking device by fixing a labyrinth sealing ring on the outer end of the hub of the coupling to rotate and seal with the outer side surface of the end cover of the docking device, effectively reducing or eliminating the phenomenon that external rainwater, cleaning agents, mist, dust and other dirt enter the interior of the docking device through the gap between the center hole of the end cover of the docking device and the center axis, ensuring that the interior of the docking device has long-lasting high-efficiency cleaning performance, thereby helping to ensure that the docking device has long-lasting excellent working performance and helping to extend the service life of the docking device.
[0015] 2. The outer peripheral edge surface of the annular eaves body 1 and the inner peripheral side surface of the annular eaves body 3 are rotated and sealed, and the annular eaves body 1 and the outer side surface of the end cover of the docking equipment are enclosed to form an annular groove 1 with an opening facing outward, thereby forming a labyrinth sealing structure located on the outer peripheral side. External water vapor, rainwater, dust and other dirt are first collected in the annular groove 1, and most of the dirt is thrown out under the centrifugal action of the high-speed rotation of the labyrinth sealing ring. The small part of liquid dirt that has not gone out will be collected on the lower side of the annular groove under the action of its own gravity and flow downward; the annular eaves The outer peripheral surface of the second body extends into the annular groove and cooperates with the outer end edge of the inner wall of the annular groove for rotational sealing. The annular eaves body 2 and the outer side surface of the end cover of the docking device are combined to form an annular groove 2 with an opening facing outward, thereby forming a first labyrinth sealing structure located on the inner side. A very small part of the dirt entering the annular groove 2 will be gathered at the lower side of the annular groove 2 under the action of its own gravity and flow downward into the annular groove 1, thereby greatly reducing the probability of dirt entering the interior of the docking device through the gap between the center hole of the end cover of the docking device and the center axis.
[0016] 3. The outer edge surface of the annular eaves body 4 is pressed against the outer surface of the spacer ring located on the inner circumferential side of the end cover of the docking device, and cooperates with the annular groove to form a second labyrinth sealing structure located on the inner side. A very small part of the dirt entering the annular groove will be gathered on the lower side of the annular groove under the action of its own gravity and flow downward into the annular groove 2, thereby further reducing the probability of dirt entering the docking device through the gap between the center hole of the end cover of the docking device and the center axis, and realizing a three-layer labyrinth sealing protection structure as a whole, ensuring the efficient sealing of the docking position between the hub end face of the coupling and the end cover of the docking device.
[0017] 4. The annular eaves body 5 blocks the dirt entering the annular cavity, which helps the dirt to gather and flow to the lower side of the annular cavity, thereby being more conducive to the discharge of the dirt; the outer end edge of the annular eaves body 5 is set as an inclined structure with the low end facing the end cover of the docking equipment. Under the centrifugal force of the high-speed rotation of the labyrinth sealing ring, the inclined structure is more conducive to the dirt gathered in the annular groove 2 to be collected into the annular cavity.
[0018] 5. The portion of the outer end face of the hub located on the inner circumference of the annular groove is pressed against the outer surface of the spacer ring located on the inner circumference of the end cover of the docking device, and cooperates with the annular groove to form a second labyrinth sealing structure located on the inner side. A very small part of the dirt entering the annular groove will be gathered on the lower side of the annular groove under the action of its own gravity and flow downward into the second annular groove, thereby further reducing the probability of dirt entering the docking device through the gap between the center hole of the end cover of the docking device and the center axis, and realizing a three-layer labyrinth sealing protection structure as a whole, ensuring efficient sealing of the docking position between the hub end face of the coupling and the end cover of the docking device; the structural design and installation method of the labyrinth sealing ring are relatively simple, thereby ensuring that the labyrinth sealing structure between the coupling hub and the gear box end cover of the utility model can be smoothly prepared and implemented.
[0019] 6. The labyrinth seal structure between the coupling hub and the gearbox end cover of the utility model is universal and practical, and is applicable between the coupling and the motor end cover, and between the coupling and the gearbox end cover; similarly, it is applicable to the drum gear coupling or the diaphragm disc coupling. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 Diagram of the assembly relationship between the coupling and the gear box in the background art;
[0021] Figure 2 yes Figure 1 A partial enlarged view of the H in the middle;
[0022] Figure 3 is a structural schematic diagram of a labyrinth seal structure between a coupling hub and a gearbox end cover in Example 1;
[0023] Figure 4 is a partial schematic diagram of the labyrinth seal structure between the coupling hub and the gear box end cover in Example 1;
[0024] Figure 5 is a schematic structural diagram of a labyrinth seal structure between a coupling hub and a gearbox end cover in Example 2;
[0025] Figure 6 It is a partial schematic diagram of the labyrinth seal structure between the coupling hub and the gear box end cover in Example 2.
[0026] In the figure: A, coupling; B, gear box; C, circumferential eaves body one; C-1, circumferential groove one; D, circumferential eaves body two; D-1, circumferential groove two; E, circumferential cavity; F, circumferential groove; G, screw; 1, wheel hub; 2, labyrinth sealing ring; 3, docking equipment end cover; 4, spacer ring; 2-1, circumferential eaves body three; 2-2, circumferential eaves body four; 2-3, circumferential eaves body five; 2-4, installation through hole. DETAILED DESCRIPTION
[0027] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.
[0028] Example 1
[0029] like Figures 3-4 As shown, a labyrinth sealing structure between a coupling hub and an end cover of a docking device comprises a coupling A and an end cover 3 of a docking device, wherein a labyrinth sealing ring 2 is fixedly arranged at the outer end of the hub 1 of the coupling A, and the labyrinth sealing ring 2 is rotationally sealed with the outer side surface of the end cover 3 of the docking device.
[0030] Preferably, the outer periphery of the labyrinth sealing ring 2 is provided with an annular eaves body 3 2-1 extending toward one side of the docking device end cover 3, the inner end edge of the labyrinth sealing ring 2 or the outer end face of the hub 1 is provided with an annular groove F opening toward the docking device end cover 3, and the outer side surface of the docking device end cover 3 is coaxially spaced from the outside to the inside with an annular eaves body 1 C and an annular eaves body 2 D extending toward the outer periphery, and the cross-sections of the annular eaves body 1 C and the cross-sections of the annular eaves body 2 D are both special-shaped L-shaped structures. The structure comprises an annular eaves body 1C and the outer side surface of the docking device end cover 3 to form an annular groove 1C-1 with its opening facing outward, and an annular eaves body 2D and the outer side surface of the docking device end cover 3 to form an annular groove 2D-1 with its opening facing outward. The outer peripheral edge surface of the annular eaves body 1C is rotationally sealed with the inner peripheral side surface of the annular eaves body 3 2-1, and the outer peripheral edge surface of the annular eaves body 2D extends into the interior of the annular groove F and is rotationally sealed with the outer end edge of the inner wall of the annular groove F.
[0031] Further preferably, the annular groove F is located at the inner end edge of the labyrinth sealing ring 2, and the inner end edge of the labyrinth sealing ring 2 forms an annular eaves body four 2-2 facing the docking device end cover 3, and the inner end edge of the labyrinth sealing ring 2 is also provided with a plurality of mounting through holes 2-4 annularly spaced and distributed at the bottom of the annular groove F, and a plurality of threaded blind holes are annularly spaced and provided on the outer end face of the hub 1, and the labyrinth sealing ring 2 is fixedly connected with the threaded blind holes on the outer end face of the hub 1 by screws G passing through the inside of the mounting through holes 2-4, and the outer end edge surface of the annular eaves body four 2-2 is tightly pressed against the outer side surface of the partition ring 4 located on the inner circumferential side of the docking device end cover 3, and the outer side surfaces of the labyrinth sealing ring 2, the annular eaves body three 2-1, and the docking device end cover 3 enclose an annular cavity E that is connected to the annular groove two D-1.
[0032] Further preferably, the middle part of the labyrinth sealing ring 2 is also provided with an annular eaves body 5 2-3 extending toward the outer peripheral side, and the annular eaves body 5 2-3 corresponds to the outer side end of the outer peripheral side wall of the annular groove F, and the outer end edge of the annular eaves body 5 2-3 is set as a low-position end located at an inclined structure facing the end cover 3 of the docking device.
[0033] Further preferably, the docking device end cover 3 is a gear box end cover located on the input side of the gear box B.
[0034] Further preferably, the coupling A is a drum gear coupling.
[0035] Example 2
[0036] like Figures 5-6 As shown, a labyrinth sealing structure between a coupling hub and an end cover of a docking device is different from a labyrinth sealing structure between a coupling hub and an end cover of a docking device in Example 1 in that: the annular groove F is located on the outer end face of the hub 1, the inner end edge of the labyrinth sealing ring 2 forms an annular eaves body four 2-2 facing the end cover 3 of the docking device, the labyrinth sealing ring 2 is interference fit on the outer end face of the hub 1 through the annular eaves body four 2-2, the labyrinth sealing ring 2, the annular eaves body three 2-1, the annular eaves body four 2-2, the outer side surface of the end cover 3 of the docking device, and the outer end face of the hub 1 enclose an annular cavity E that is connected to the annular groove two D-1, and the part of the outer end face of the hub 1 located on the inner circumference of the annular groove F is pressed against the outer side face of the spacer ring 4 located on the inner circumference of the end cover 3 of the docking device.
[0037] Example 3
[0038] A labyrinth sealing structure between a coupling hub and an end cover of a docking device is different from the labyrinth sealing structure between a coupling hub and an end cover of a docking device in Example 1 in that the end cover 3 of the docking device is a motor end cover located on the output side of the motor.
[0039] Example 4
[0040] A labyrinth sealing structure between a coupling hub and an end cover of a docking device is different from a labyrinth sealing structure between a coupling hub and an end cover of a docking device in Example 2 in that the coupling A is a diaphragm disc coupling.
[0041] Example 5
[0042] A labyrinth sealing structure between a coupling hub and an end cover of a docking device is different from the labyrinth sealing structure between a coupling hub and an end cover of a docking device in Example 2 in that the coupling A is a flexible plate coupling.
[0043] The labyrinth sealing structure between the coupling hub and the end cover of the docking device of the utility model significantly improves the sealing performance of the docking position between the hub end face of the coupling and the end cover of the docking device by fixing a labyrinth sealing ring on the outer end of the hub of the coupling and rotatingly sealing with the outer side surface of the end cover of the docking device, and effectively reduces or eliminates the phenomenon that external rainwater, cleaning agents, mist, dust and other dirt enter the interior of the docking device through the gap between the center hole of the end cover of the docking device and the center axis, ensuring that the interior of the docking device has long-lasting high-efficiency cleaning performance, thereby helping to ensure that the docking device has long-lasting excellent working performance and helping to extend the service life of the docking device.
[0044] The outer peripheral edge surface of the annular eaves body 1 rotates and seals with the inner peripheral side surface of the annular eaves body 3, and the annular eaves body 1 and the outer side surface of the docking device end cover are enclosed to form an annular groove 1 with an opening facing outward, thereby forming a labyrinth sealing structure located on the outer peripheral side, and external water vapor, rainwater, dust and other dirt first gather in the annular groove 1, and most of the dirt is thrown out under the centrifugal action of the high-speed rotation of the labyrinth sealing ring, and the small part of liquid dirt that has not gone out will gather on the lower side of the annular groove under the action of its own gravity and flow downward; the outer peripheral edge surface of the annular eaves body 2 extends into the annular groove and rotates and seals with the outer end edge of the inner wall of the annular groove, and the annular eaves body 2 and the outer side surface of the docking device end cover are enclosed to form an annular groove 2 with an opening facing outward, thereby forming the first labyrinth sealing structure located on the inner side, and a very small part of the dirt that enters the annular groove 2 will gather on the lower side of the annular groove 2 under the action of its own gravity and flow downward into the annular groove The inner part of groove one, thereby greatly reducing the probability of dirt entering the docking device through the gap between the center hole of the end cover of the docking device and the center axis; the outer end edge surface of the annular eaves body four is tightly pressed against the outer side surface of the spacer ring located on the inner circumference side of the end cover of the docking device, and cooperates with the annular groove to form a second labyrinth sealing structure located on the inner side, or the part of the outer end surface of the hub located on the inner circumference side of the annular groove is tightly pressed against the outer side surface of the spacer ring located on the inner circumference side of the end cover of the docking device, and cooperates with the annular groove to form a second labyrinth sealing structure located on the inner side, so that a very small part of the dirt entering the inside of the annular groove will be gathered on the lower side of the annular groove under the action of its own gravity and flow downward into the inside of the annular groove two, thereby further reducing the probability of dirt entering the inside of the docking device through the gap between the center hole of the end cover of the docking device and the center axis, and realizing a three-layer labyrinth sealing protection structure as a whole, ensuring the efficient sealing of the docking position between the hub end face of the coupling and the end cover of the docking device.
[0045] The utility model provides a labyrinth sealing structure between the coupling hub and the end cover of the docking device, wherein the end cover of the docking device is a gear box end cover located on the input side of the gear box or a motor end cover located on the output side of the motor, and can also be other devices docked and connected to the coupling; the coupling is one of a drum gear coupling, a diaphragm disc coupling or a flexible plate coupling, and can also be other types of couplings.
[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. The labyrinth seal structure between the coupling hub and the end cover of the docking equipment is characterized by: It comprises a coupling (A) and a docking device end cover (3), wherein the outer end of the hub (1) of the coupling (A) is fixedly provided with a labyrinth sealing ring (2), and the labyrinth sealing ring (2) is engaged with the outer side surface of the docking device end cover (3) in a rotational sealing manner.
2. The labyrinth seal structure between the coupling hub and the end cover of the docking device according to claim 1, characterized in that: The outer periphery of the labyrinth sealing ring (2) is provided with an annular eaves body three (2-1) extending toward one side of the docking device end cover (3); the inner end edge of the labyrinth sealing ring (2) or the outer end surface of the hub (1) is provided with an annular groove (F) opening toward the docking device end cover (3); the outer side surface of the docking device end cover (3) is provided with an annular eaves body one (C) and an annular eaves body two (D) extending toward the outer periphery at intervals from the outside to the inside, and the cross-sections of the annular eaves body one (C) and the cross-sections of the annular eaves body two (D) are both special-shaped L-shaped structures The annular eaves body 1 (C) and the outer side surface of the docking device end cover (3) are combined to form an annular groove 1 (C-1) with an opening facing outward, and the annular eaves body 2 (D) and the outer side surface of the docking device end cover (3) are combined to form an annular groove 2 (D-1) with an opening facing outward. The outer peripheral edge surface of the annular eaves body 1 (C) is rotationally sealed with the inner peripheral side surface of the annular eaves body 3 (2-1), and the outer peripheral edge surface of the annular eaves body 2 (D) extends into the annular groove (F) and is rotationally sealed with the outer end edge of the inner wall of the annular groove (F).
3. The labyrinth seal structure between the coupling hub and the end cover of the docking equipment according to claim 2, characterized in that: The annular groove (F) is located at the inner edge of the labyrinth sealing ring (2). The inner edge of the labyrinth sealing ring (2) forms an annular eaves body four (2-2) facing the docking device end cover (3). The inner edge of the labyrinth sealing ring (2) is also provided with a plurality of mounting through holes (2-4) annularly spaced and distributed at the bottom of the annular groove (F). The outer end surface of the wheel hub (1) is provided with a plurality of threaded blind holes annularly spaced and distributed. The labyrinth sealing ring (2) is fixedly connected to the threaded blind holes on the outer end surface of the wheel hub (1) by screws (G) passing through the inside of the mounting through holes (2-4). The outer edge surface of the annular eaves body four (2-2) is pressed against the outer surface of the partition ring (4) located on the inner circumference of the docking device end cover (3). The outer side surfaces of the labyrinth sealing ring (2), the annular eaves body three (2-1) and the docking device end cover (3) are enclosed to form an annular cavity (E) intersecting the annular groove two (D-1).
4. The labyrinth seal structure between the coupling hub and the end cover of the docking device according to claim 3, characterized in that: The middle part of the labyrinth sealing ring (2) is also provided with an annular eaves body 5 (2-3) extending toward the outer peripheral side, and the annular eaves body 5 (2-3) is located corresponding to the outer side end of the outer peripheral side wall of the annular groove (F), and the outer end edge of the annular eaves body 5 (2-3) is set as a slope structure with a low end located toward the end cover (3) of the docking device.
5. The labyrinth seal structure between the coupling hub and the end cover of the docking device according to claim 2, characterized in that: The annular groove (F) is located on the outer end face of the wheel hub (1); the inner end edge of the labyrinth sealing ring (2) forms an annular eaves body four (2-2) facing the end cover (3) of the docking device; the labyrinth sealing ring (2) is interference fit on the outer end face of the wheel hub (1) through the annular eaves body four (2-2); the labyrinth sealing ring (2), the annular eaves body three (2-1), the annular eaves body four (2-2), the outer side surface of the docking device end cover (3), and the outer end face of the wheel hub (1) together form an annular cavity (E) intersecting with the annular groove two (D-1); the portion of the outer end face of the wheel hub (1) located on the inner circumference side of the annular groove (F) is pressed against the outer side face of the spacer ring (4) located on the inner circumference side of the end cover (3) of the docking device.
6. The labyrinth seal structure between the coupling hub and the end cover of the docking equipment according to any one of claims 1 to 5, characterized in that: The docking device end cover (3) is a gear box end cover located on the input side of the gear box (B) or a motor end cover located on the output side of the motor.
7. The labyrinth seal structure between the coupling hub and the end cover of the docking device according to claim 6, characterized in that: The coupling (A) is one of a drum gear coupling, a diaphragm coupling or a flexible plate coupling.