CN111322412A

CN111322412A - Labyrinth seal device with labyrinth rings different in wear resistance

Info

Publication number: CN111322412A
Application number: CN202010268949.5A
Authority: CN
Inventors: 吴明星
Original assignee: Maanshan Maike Yingfu Machinery Technology Co ltd
Current assignee: Maanshan Maike Yingfu Machinery Technology Co ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2020-06-23

Abstract

The invention discloses a labyrinth sealing device with labyrinth rings with different wear resistances, which comprises a rotating shaft and a bearing, wherein a bearing sleeve is sleeved on the outer side of the bearing, an inner bearing cover and an outer bearing cover are arranged on the bearing, the bearing is placed in a bearing chamber, a first oil inlet hole and a first oil outlet hole are respectively formed in the bearing sleeve, a second oil inlet hole is formed in the outer bearing cover, a second oil outlet hole is formed in the inner bearing cover, a labyrinth sealing mechanism is arranged between the inner bearing cover and the rotating shaft, the labyrinth sealing mechanism comprises a first labyrinth ring and a second labyrinth ring, the first labyrinth ring comprises a first rib, a second rib and a third rib which are sequentially arranged, the second labyrinth ring comprises a fourth rib, a fifth rib and a sixth rib which are sequentially arranged, and the first rib, the second rib and the third rib are overlapped with the fourth rib, the fifth rib and the sixth rib to be mutually embedded in a. Has the advantages that: lubricating oil is sealed through the labyrinth sealing mechanism, so that the lubricating oil can flow into the bearing chamber to be sealed, and the oil leakage is avoided.

Description

Labyrinth seal device with labyrinth rings different in wear resistance

Technical Field

The present invention relates to a labyrinth seal, and more particularly, to a labyrinth seal having labyrinth rings with different wear resistances.

Background

The labyrinth seal is that several ring seal teeth are arranged around the rotating shaft, a series of cut-off gaps and expansion cavities are formed between teeth, and the sealed medium produces throttling effect when passing through the gaps of the zigzag labyrinth, so as to achieve the purpose of leakage resistance. A non-contact dynamic seal with labyrinth-type channels for limiting the leakage of fluid is disclosed. The maze has many forms. The gas flows through the throttling narrow slit from the high-pressure side at a very high flow speed and then enters the labyrinth cavity to expand so as to consume the speed energy formed by the gas flowing through the narrow slit, and resistance is generated after multiple times of throttling and expansion to prevent the gas from leaking outwards, thereby achieving the purpose of sealing. The labyrinth seal is not limited by the rotating speed and the temperature, the friction power consumption is extremely low, the number of the grid teeth is increased, and the labyrinth seal can seal gas with higher pressure, is mainly used for sealing main shafts of turbine compressors, gas turbines and the like, and is also commonly used in rolling bearings. The function of the fluid creating resistance and reducing its flow through the labyrinth is called the "labyrinth effect". For liquid, the fluid mechanical effect comprises a hydraulic friction resistance effect and a flow beam contraction effect; for gases, there is also the thermodynamic effect, i.e. the thermal conversion of the gas in the labyrinth by compression or expansion; in addition, there are "ventilation effects" and the like. The labyrinth sealing mechanism is complicated because the labyrinth effect is a complex reaction of these effects.

In the existing labyrinth seal device, the defect of low abrasion resistance is existed, therefore, a labyrinth seal device with labyrinth rings with different abrasion resistance is proposed to solve the existing problems.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

The present invention is directed to a labyrinth seal device having labyrinth rings with different wear resistances, so as to solve the problems of the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a labyrinth seal device with labyrinth rings with different wear resistances comprises a rotating shaft and a bearing, wherein a bearing sleeve is sleeved outside the bearing, the bearing is provided with an inner bearing cover and an outer bearing cover, the bearing is placed in the bearing chamber, the bearing sleeve is respectively provided with a first oil inlet hole and a first oil outlet hole, the outer bearing cover is provided with a second oil inlet hole, the inner bearing cover is provided with a second oil outlet hole, a labyrinth sealing mechanism is arranged between the inner bearing cover and the rotating shaft as well as between the outer bearing cover and the rotating shaft, the labyrinth sealing mechanism comprises a first labyrinth ring and a second labyrinth ring, the first labyrinth ring comprises a first rib, a second rib and a third rib which are arranged in sequence, the second labyrinth ring comprises a rib four, a rib five and a rib six which are sequentially arranged, wherein the rib one, the rib two and the rib three are overlapped with the rib four, the rib five and the rib six to be mutually embedded in a concave-convex mode.

Furthermore, an oil drainage hole is formed in the fin IV.

Furthermore, a spring retainer ring is arranged on the outer side of the second labyrinth ring.

Further, a lubricating grease is arranged between the first labyrinth ring and the second labyrinth ring.

Furthermore, the four fins, the five fins and the six fins are assembled to form three grooves.

Furthermore, the teeth on the first rib, the second rib and the third rib are respectively embedded into the grooves.

Further, the first labyrinth ring surface material is quenched steel.

Further, the second labyrinth ring surface material is plastic.

The invention provides a labyrinth seal device with labyrinth rings with different wear resistances, which has the following beneficial effects:

(1) the bearing sleeve is provided with the oil inlet hole I and the oil outlet hole I, the outer bearing cover is provided with the oil inlet hole II, the inner bearing cover is provided with the oil outlet hole II, so that lubricating oil can enter the bearing chamber through the oil inlet hole I and the oil inlet hole II, and when the rotating shaft rotates inside the bearing, the lubricating oil flows into the bearing chamber to lubricate the bearing, so that the friction force is reduced, and the wear resistance is improved; through setting up the combination of first labyrinth ring and second labyrinth ring and forming labyrinth seal mechanism, seal lubricating oil through labyrinth seal mechanism for lubricating oil can flow into the bearing chamber and seal, avoids appearing the condition of oil leak, and final lubricating oil outlet one and two discharge of department of oil outlet.

(2) When the rotation axis rotation during operation, under the effect of centrifugal force, lubricating oil can be got rid of leave first labyrinth ring to through establishing the draining hole backward flow in first labyrinth ring fin four bearing room, through being equipped with the circlip, play the fixed effect of strengthening the second labyrinth ring, prevent the second labyrinth ring drunkenness appear. And the lubricating grease is arranged between the first labyrinth ring and the second labyrinth ring, so that a good lubricating effect is achieved.

(3) By providing the first and second labyrinth ring surfaces with different materials, it is possible to assign to each of the two labyrinth rings more or less wear-resistant surface regions, so that during operation of the labyrinth seal the surface material wears more quickly than the remaining material of the respective labyrinth ring.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a labyrinth seal having labyrinth rings with different wear resistances in accordance with an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a labyrinth sealing mechanism in a labyrinth sealing device with labyrinth rings with different wear resistances according to an embodiment of the invention.

Reference numerals:

1. a rotating shaft; 2. a bearing; 3. a bearing housing; 4. an inner bearing cap; 5. an outer bearing cap; 6. an oil inlet hole I; 7. an oil outlet hole I; 8. an oil inlet hole II; 9. a labyrinth seal mechanism; 10. a first labyrinth ring; 11. A second labyrinth ring; 12. a first rib; 13. a second rib; 14. a rib III; 15. a rib four; 16. a rib five; 17. a rib six; 18. an oil drainage hole; 19. a spring collar; 20. a groove; 21. an oil outlet hole II; 22. a bearing chamber.

Detailed Description

The invention is further described with reference to the following drawings and detailed description:

the first embodiment is as follows:

referring to fig. 1-2, a labyrinth seal device with labyrinth rings having different wear resistances according to an embodiment of the present invention includes a rotating shaft 1 and a bearing 2, a bearing housing 3 is sleeved outside the bearing 2, an inner bearing cap 4 and an outer bearing cap 5 are disposed on the bearing 2, the bearing 2 is disposed in the bearing chamber, an oil inlet 6 and an oil outlet 7 are respectively disposed on the bearing housing 3, an oil inlet 8 is disposed on the outer bearing cap 5, an oil outlet 21 is disposed on the inner bearing cap 4, a labyrinth seal mechanism 9 is disposed between the inner bearing cap 4 and the outer bearing cap 5 and the rotating shaft 1, the labyrinth seal mechanism 9 includes a first labyrinth ring 10 and a second labyrinth ring 11, the first labyrinth ring 10 includes a first rib 12, a second rib 13 and a third rib 14, which are sequentially disposed, the second labyrinth ring 11 includes a fourth rib 15, and a third rib 14, which are sequentially disposed, The bearing comprises a first rib 16 and a second rib 17, wherein the first rib 12, the second rib 13, the third rib 14, the fourth rib 15, the fifth rib 16 and the sixth rib 17 are overlapped and embedded in a concave-convex manner, an oil inlet hole 6 and an oil outlet hole 7 are formed in the bearing sleeve 3, an oil inlet hole 8 is formed in the outer bearing cover 5, an oil outlet hole 21 is formed in the inner bearing cover 4, so that lubricating oil can enter the bearing chamber 22 through the oil inlet hole 6 and the oil inlet hole 7, and when the rotating shaft 1 rotates in the bearing 2, the lubricating oil flows into the bearing chamber 22 to lubricate the bearing 2, so that the friction force is reduced, and the wear resistance is improved; through setting up first labyrinth ring 10 and the combination of second labyrinth ring 11 and forming labyrinth seal mechanism 9, seal lubricating oil through labyrinth seal mechanism 9 for lubricating oil can flow into and carry out sealedly in the bearing room 22, avoids appearing the condition of oil leak, and final lubricating oil outlet 7 and two 21 departments of oil outlet are discharged.

Example two:

referring to fig. 1-2, for the rib four 15, the oil drainage hole 18 is opened on the rib four 15. For the second labyrinth ring 11, a spring collar 19 is provided outside the second labyrinth ring 11. For the first labyrinth ring 10, a lubricating grease is provided between the first labyrinth ring 10 and the second labyrinth ring 11. For the rib four 15, the rib five 16 and the rib six 17 are assembled to form three grooves 20. For the first rib 12, the teeth of the first rib 12, the second rib 13 and the third rib 14 are respectively embedded into the grooves 20, when the rotating shaft 1 rotates to work, under the action of centrifugal force, lubricating oil can be thrown away from the first labyrinth ring 10 and flows back to a bearing chamber through an oil drainage hole 18 arranged on the fourth rib 15 of the first labyrinth ring 10, a spring retainer ring 19 is arranged to play a role in strengthening the fixation of the second labyrinth ring 11, and the second labyrinth ring 11 is prevented from moving. By providing a lubricating grease between the first labyrinth ring 10 and the second labyrinth ring 11, a good lubricating effect is achieved.

Example three:

referring to FIGS. 1-2, for first labyrinth ring 10, the surface material of first labyrinth ring 10 is hardened steel. In the case of the second labyrinth ring 11, the surface material of the second labyrinth ring 11 is plastic, and by providing the surfaces of the first labyrinth ring 10 and the second labyrinth ring 11 with different materials, the two labyrinth rings can each be assigned a more wear-resistant or less wear-resistant surface region, so that during operation of the labyrinth seal 9 the surface material wears away more quickly than the remaining material of the respective labyrinth ring.

For the convenience of understanding the technical solutions of the present invention, the following detailed descriptions will be provided for the working principles or the operation modes of the present invention in the practical process

In practical application, the bearing sleeve 3 is provided with the first oil inlet hole 6 and the first oil outlet hole 7, the outer bearing cover 5 is provided with the second oil inlet hole 8, the inner bearing cover 4 is provided with the second oil outlet hole 21, so that lubricating oil can enter the bearing chamber 22 through the first oil inlet hole 6 and the second oil inlet hole 8, and when the rotating shaft 1 rotates inside the bearing 2, the lubricating oil flows into the bearing chamber 22 to lubricate the bearing 2, so that the friction force is reduced, and the wear resistance is improved; through setting up first labyrinth ring 10 and the combination of second labyrinth ring 11 and forming labyrinth seal mechanism 9, seal lubricating oil through labyrinth seal mechanism 9 for lubricating oil can flow into and carry out sealedly in the bearing room 22, avoids appearing the condition of oil leak, and final lubricating oil outlet 7 and two 21 departments of oil outlet are discharged. When the rotating shaft 1 rotates to work, under the action of centrifugal force, lubricating oil can be thrown away from the first labyrinth ring 10 and flows back to a bearing chamber through oil drainage holes 18 formed in four fins 15 of the first labyrinth ring 10, and the fixing effect of the second labyrinth ring 11 is enhanced by arranging the spring retainer ring 19, so that the second labyrinth ring 11 is prevented from moving. By providing a lubricating grease between the first labyrinth ring 10 and the second labyrinth ring 11, a good lubricating effect is achieved. By providing the surfaces of the first labyrinth ring 10 and the second labyrinth ring 11 with different materials, it is possible to assign a more or less wear-resistant surface region to each of the two labyrinth rings, so that during operation of the labyrinth seal 9 the surface material wears more quickly than the remaining material of the respective labyrinth ring.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a labyrinth seal device with different labyrinth rings of wearability, a serial communication port, including axis of rotation (1) and bearing (2), bearing (2) outside cover is equipped with bearing housing (3), be equipped with interior bearing cap (4) and outer bearing cap (5) on bearing (2), bearing (2) are placed in bearing chamber (22), oil inlet (6) and oil outlet (7) have been seted up on bearing housing (3) respectively, oil inlet two (8) have been seted up on outer bearing cap (5), oil outlet two (21) have been seted up on interior bearing cap (4), interior bearing cap (4) with outer bearing cap (5) with be equipped with labyrinth seal mechanism (9) between axis of rotation (1), labyrinth seal mechanism (9) include first labyrinth ring (10) and second labyrinth ring (11), first labyrinth ring (10) are including the fin (12) that are equipped with in proper order, The labyrinth ring structure comprises a second rib (13) and a third rib (14), wherein the second labyrinth ring (11) comprises a fourth rib (15), a fifth rib (16) and a sixth rib (17) which are sequentially arranged, the first rib (12), the second rib (13) and the third rib (14) are embedded in the fourth rib (15), the fifth rib (16) and the sixth rib (17) in a mutually overlapped concave-convex mode.

2. Labyrinth seal with labyrinth rings of different wear resistances according to claim 1, characterized in that said four fins (15) are equipped with oil drainage holes (18).

3. Labyrinth seal with labyrinth rings of different wear resistance as per claim 2, characterized in that the second labyrinth ring (11) is provided with a circlip (19) on the outside.

4. Labyrinth seal with labyrinth rings of different wear resistance, according to claim 3, characterized in that a lubricating grease is provided between the first labyrinth ring (10) and the second labyrinth ring (11).

5. Labyrinth seal with labyrinth rings of different wear resistance, according to claim 4, characterized in that said four (15), five (16) and six (17) fins are assembled to form three grooves (20).

6. Labyrinth seal with labyrinth rings of different wear resistance, according to claim 5, characterized in that the teeth of the first (12), second (13) and third (14) ribs are respectively embedded in the grooves (20).

7. Labyrinth seal with labyrinth rings of different wear resistance according to claim 6, characterized in that the first labyrinth ring (10) surface material is hardened steel.

8. Labyrinth seal with labyrinth rings of different wear resistance according to claim 7, characterized in that the second labyrinth ring (11) surface material is plastic.