Novel non-contact sealing isolation structure

Abstract

The utility model discloses a novel non-contact sealing isolation structure which comprises a roller, a shaft head of the roller is rotationally installed in a bearing chamber through a bearing, a static labyrinth ring is arranged at the inner end of the bearing chamber, a labyrinth channel is formed between the static labyrinth ring and a movable labyrinth ring, and the movable labyrinth ring is fixedly connected to the roller. A spacer bush is arranged at the inner end of the bearing chamber, and the spacer bush is buckled outside the movable labyrinth ring; an inner check ring is arranged inside the spacer bush, an outer check ring is arranged outside the spacer bush, the inner check ring and the outer check ring are fixedly connected to the roller through set screws, and the inner check ring and the outer check ring are arranged close to the spacer bush; drainage holes are formed in the bottoms of the spacer bushes. According to the sealing isolation structure provided by the utility model, oil and water inside and outside the bearing chamber can be isolated through lower cost and modification, washing water during production is isolated from a lubricating system, water is prevented from entering the bearing chamber, and the service life of the structure device is prolonged.

Description

Technical Field

[0001] The utility model relates to a novel non-contact sealing isolation structure, belonging to the technical field of sealing structures. Background Art

[0002] Rollers are used in many places during paper mill production activities. Roller operation has the characteristics of high speed, heavy load, high bearing temperature and harsh environment. Therefore, in order to ensure the normal operation of rollers, lubrication and cooling of roller bearings are particularly important.

[0003] In the prior art, labyrinth seals are commonly used to isolate roller bearings. Figure 1 As shown, the bearing chamber 4 and the static labyrinth ring 3 as a whole do not rotate during production. The dynamic labyrinth ring 2 is fixed to the roller 1 by a set screw and rotates synchronously with it, and a labyrinth channel is formed between the dynamic labyrinth ring 2 and the static labyrinth ring 3. When the equipment is running, the lubricating oil enters the bearing chamber 4 from the oil inlet 10 and churns inside with the rotation of the roller 1 and the bearing 5, partially contacts the dynamic sealing ring 2, and is then thrown onto the static labyrinth ring 3 by the passive sealing ring 2. Since the static labyrinth ring 3 does not rotate when the equipment is running, the grease thrown onto it will flow back to the bearing chamber 4 along its inner wall, thereby achieving sealing. In addition, there is no mutual contact and friction between the dynamic labyrinth ring 2 and the static labyrinth ring 3, so the structure can operate effectively for a long time.

[0004] The above structure can effectively prevent the grease inside the bearing chamber from being thrown out during operation. However, in the production process, water is needed to flush various parts, and water often enters the roller bearing chamber. The existing labyrinth sealing structure cannot prevent external flushing water from entering the bearing chamber along the labyrinth channel. Once water enters the bearing chamber, the life of the bearing at this location will be rapidly reduced at the least, and the water will flow to the thin oil station along the oil return pipeline at the worst, affecting the effect and life of the entire lubrication system.

[0005] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0006] In view of the deficiencies in the background technology, the utility model provides a novel non-contact sealing isolation structure, which can achieve the isolation of oil and water inside and outside the bearing chamber with relatively small cost and modification, isolate the flushing water during production from the lubrication system, prevent moisture from entering the bearing chamber, and increase the service life of the structural device.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A novel non-contact sealing isolation structure includes a roller, the shaft head of the roller is rotatably installed in a bearing chamber through a bearing, a static labyrinth ring is arranged at the inner end of the bearing chamber, a labyrinth channel is formed between the static labyrinth ring and a dynamic labyrinth ring, and the dynamic labyrinth ring is fixed to the roller;

[0009] The inner end of the bearing chamber is provided with a spacer sleeve, which is buckled on the outside of the moving labyrinth ring;

[0010] An inner retaining ring is arranged inside the spacer sleeve, and an outer retaining ring is arranged outside the spacer sleeve. Both the inner retaining ring and the outer retaining ring are fixed to the roller by means of set screws, and both the inner retaining ring and the outer retaining ring are arranged close to the spacer sleeve. A drainage hole is arranged at the bottom of the spacer sleeve.

[0011] Furthermore, the main body of the spacer sleeve is a conical structure, and the outside of the large diameter end of the conical body is provided with a ring plate integrally formed therewith, and the ring plate is fixed to the inner end surface of the bearing chamber by a hexagon socket screw; the inside of the small diameter end of the conical body is provided with a ring plate integrally formed therewith, and the ring plate is sleeved on the roller.

[0012] Furthermore, channels are provided between the outer retaining ring and the spacer sleeve, and between the spacer sleeve and the inner retaining ring.

[0013] Furthermore, the inner and outer retaining rings are both provided with O-rings for sealing.

[0014] Furthermore, an outer end cover is installed at the outer end of the bearing chamber, and the outer end cover is connected to the outer end of the bearing chamber through a hexagonal bolt.

[0015] Furthermore, an oil inlet is provided on the top of the bearing chamber, the oil inlet is located directly above the bearing, and the oil inlet is connected to the oil inlet pipeline through a pipe joint.

[0016] Furthermore, an oil outlet is provided at the bottom of the outer end cover, and the oil outlet is connected to the oil return pipeline through a pipe joint.

[0017] Furthermore, the side portion of the bearing is fixed and limited by a round nut.

[0018] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0019] The utility model effectively isolates water from entering the lubrication and cooling system by combining the axial labyrinth and the radial labyrinth, thereby stabilizing the service life of the bearing and the entire system and ensuring the use effect;

[0020] The utility model realizes internal and external isolation at the same time, and the parts do not move relative to each other, that is, no friction loss is generated, the service life of the structure device is increased, and no other costs are generated;

[0021] The utility model realizes sealing through its own structure and the rotation of the roller during operation, and does not require additional energy consumption.

[0022] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a labyrinth seal structure in the prior art;

[0024] Figure 2 It is a structural schematic diagram of the utility model.

[0025] In the figure, 1- roller, 2- dynamic labyrinth ring, 3- static labyrinth ring, 4- bearing chamber, 5- bearing, 6- round nut, 7- outer end cover, 8- oil outlet, 9- hexagonal bolt, 10- oil inlet, 11- outer retaining ring, 12- spacer, 13- inner retaining ring, 14- hexagon socket screw, 15- drain hole. DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown together, the utility model provides a novel non-contact sealing isolation structure, including a roller 1, the shaft head of the roller 1 is rotatably installed in a bearing chamber 4 through a bearing 5, and the side of the bearing 5 is fixed and limited by a round nut 6.

[0028] The inner end of the bearing chamber 4 is provided with a static labyrinth ring 3, and a labyrinth passage is formed between the static labyrinth ring 3 and the dynamic labyrinth ring 2. The dynamic labyrinth ring 2 is fixed to the roller 1 by means of set screws.

[0029] An outer end cover 7 is installed at the outer end of the bearing chamber 4 , and the outer end cover 7 is connected to the outer end of the bearing chamber 4 through a hexagonal bolt 9 .

[0030] An oil inlet 10 is provided at the top of the bearing chamber 4, and the oil inlet 10 is located directly above the bearing 5. The oil inlet 10 is connected to the oil inlet pipeline through a pipe joint; an oil outlet 8 is provided at the bottom of the outer end cover 7, and the oil outlet 8 is connected to the oil return pipeline through a pipe joint.

[0031] The inner end of the bearing chamber 4 is provided with a spacer sleeve 12 , which is buckled onto the outside of the moving labyrinth ring 2 .

[0032] The main body of the spacer sleeve 12 is a conical structure, and a ring plate integrally formed with it is provided on the outside of the large diameter end of the conical body, and the ring plate is fixed to the inner end surface of the bearing chamber 4 by a hexagon socket screw 14; a ring plate integrally formed with it is provided on the inside of the small diameter end of the conical body, and the ring plate is sleeved on the roller 1.

[0033] An inner retaining ring 13 is provided inside the spacer 12, and an outer retaining ring 11 is provided outside the spacer 12. Both the inner retaining ring 13 and the outer retaining ring 11 are fixed to the roller 1 by fixing screws, and both the inner retaining ring 13 and the outer retaining ring 11 are arranged close to the ring plate at the small diameter end of the spacer 12.

[0034] There are channels between the outer retaining ring 11 and the spacer 12, and between the spacer 12 and the inner retaining ring 13. The channels can ensure that the inner retaining ring 13, the spacer 12 and the outer retaining ring 11 do not contact each other, and the channel width is smaller than the diameter of the water drop, and the channel width is as narrow as possible.

[0035] The inner and outer retaining rings 13 and 11 are both provided with O-rings for sealing.

[0036] A drainage hole 15 is provided at the bottom of the conical body of the spacer 12 for draining the flushing water entering the spacer 12 .

[0037] Installation process and working principle of this utility model:

[0038] Connect the outer retaining ring 11, the spacer 12, the inner retaining ring 13, and the moving labyrinth ring 2 to the roller 1 in sequence, but do not fix them first;

[0039] Install the bearing 5, bearing chamber 4 and outer end cover 7 to the correct position of the roller 1 in sequence, and fix them with round nuts 6 and hexagonal bolts 9 respectively (apply sealant to the mounting surface of the outer end cover);

[0040] Install the dynamic labyrinth ring 2, inner retaining ring 13, spacer 12, and outer retaining ring 11 to the correct position in sequence, and fix them with hexagon socket screws 14 or set screws (sealant is applied to the installation surface of the spacer). The installation principle here is that the inner retaining ring 13-spacer 12-outer retaining ring 11 must not contact each other and the intervals between them must be as narrow as possible (smaller than the diameter of a water drop);

[0041] After all parts are installed, install roller 1 on the equipment and connect the oil inlet and return pipelines and transmission device (if any) respectively;

[0042] After the overall installation is completed, the machine is started for production. During production, the lubricating oil enters the bearing chamber 4 from the oil inlet pipe. Due to the stirring of the roller 1 and the bearing 5, part of the lubricating oil will be thrown to the labyrinth ring, and returned to the bearing chamber 4 under the action of the labyrinth ring. Finally, it returns to the oil station through the oil return pipe with the heat generated by the operation of the bearing 5, realizing the lubrication and cooling of the bearing 5.

[0043] When spraying flushing water in production, water will be sprayed to the bearing chamber 4 from all directions above. Since the bearing chamber 4 is installed in a closed manner, flushing water cannot enter and can only enter through the narrow passage between the outer retaining ring 11-spacer 12-inner retaining ring 13. To enter this passage, the flushing water must be aligned with the gap between the outer retaining ring 11-spacer 12 and the direction must be perpendicular to it. Therefore, most of the flushing water can be blocked here.

[0044] Since the channel width is smaller than the diameter of the water droplet / water flow, the water that meets the conditions and can enter the gap will contact the side wall of the outer retaining ring 11, and the outer retaining ring 11 is fixed to the roller 1 by the set screws and rotates at high speed with the roller. The water that touches it will be thrown out by the centrifugal force, and only the residual water that only contacts the spacer 12 but not the outer retaining ring 11 will stop on the outer wall of the spacer 12 or gather and continue to flow along the channel under the influence of gravity;

[0045] When only a small amount of water enters the spacer 12-inner retaining ring 13 channel through the outer retaining ring 11-spacer 12 channel, it is also affected by the centrifugal force of the inner retaining ring 13 and thrown onto the inner wall of the spacer 12. Since the spacer 12 itself does not rotate during production operation, the water thrown onto its inner wall will slowly flow to the bottom due to gravity, and then flow out of the chamber through the pre-set drainage hole 15, ultimately ensuring that the flushing water will not enter the lubrication and cooling system.

[0046] The solution demonstrated by the utility model is that the retaining ring + spacer adopts a 2+1 method, that is, 2 retaining rings + 1 spacer. When there is sufficient space, one or more sets of retaining rings + spacers can be appropriately added to become 3+2 or even higher, so that the water retaining channel is more tortuous and narrow, and the water retaining effect is further increased.

[0047] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. A novel non-contact sealing isolation structure comprises a roller (1), wherein the shaft head of the roller (1) is rotatably mounted in a bearing chamber (4) via a bearing (5), a static labyrinth ring (3) is provided at the inner end of the bearing chamber (4), a labyrinth passage is formed between the static labyrinth ring (3) and a dynamic labyrinth ring (2), and the dynamic labyrinth ring (2) is fixedly connected to the roller (1), wherein: The inner end of the bearing chamber (4) is provided with a spacer sleeve (12), and the spacer sleeve (12) is buckled onto the outside of the moving labyrinth ring (2); An inner retaining ring (13) is provided inside the spacer (12), and an outer retaining ring (11) is provided outside the spacer (12); the inner retaining ring (13) and the outer retaining ring (11) are both fixed to the roller (1) by means of set screws, and the inner retaining ring (13) and the outer retaining ring (11) are both arranged close to the spacer (12); and a drainage hole (15) is provided at the bottom of the spacer (12).

2. A novel non-contact sealing isolation structure as claimed in claim 1, characterized in that: The main body of the spacer sleeve (12) is a conical structure, and a ring plate integrally formed therewith is provided on the outside of the large diameter end of the conical main body, and the ring plate is fixed to the inner end surface of the bearing chamber (4) by means of a hexagon socket screw (14); and a ring plate integrally formed therewith is provided on the inside of the small diameter end of the conical main body, and the ring plate is sleeved on the roller (1).

3. A novel non-contact sealing isolation structure as claimed in claim 1, characterized in that: A channel is provided between the outer retaining ring (11) and the spacer sleeve (12), and between the spacer sleeve (12) and the inner retaining ring (13).

4. A novel non-contact sealing isolation structure as claimed in claim 3, characterized in that: The inner retaining ring (13) and the outer retaining ring (11) are both provided with O-rings that perform a sealing function.

5. A novel non-contact sealing isolation structure as claimed in claim 1, characterized in that: An outer end cover (7) is installed at the outer end of the bearing chamber (4), and the outer end cover (7) is connected to the outer end of the bearing chamber (4) via a hexagonal bolt (9).

6. A novel non-contact sealing isolation structure as claimed in claim 5, characterized in that: An oil inlet (10) is provided at the top of the bearing chamber (4); the oil inlet (10) is located directly above the bearing (5); and the oil inlet (10) is connected to the oil inlet pipeline via a pipe joint.

7. A novel non-contact sealing isolation structure as claimed in claim 6, characterized in that: An oil outlet (8) is provided at the bottom of the outer end cover (7), and the oil outlet (8) is connected to the oil return pipeline via a pipe joint.

8. A novel non-contact sealing isolation structure as claimed in claim 1, characterized in that: The side of the bearing (5) is fixed and limited by a round nut (6).

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