Water-cooling sealing structure of main shaft of online alkali liquor filter

Abstract

The utility model discloses a water-cooling sealing structure of a main shaft of an alkali liquor on-line filter, which is characterized in that a sleeve is fixed with a reduction gearbox, and the main shaft is coaxially arranged in the sleeve; a first annular groove and a second annular groove are formed in the inner side wall of the sleeve, a first elastic sealing ring is embedded in the first annular groove, a second elastic sealing ring is embedded in the second annular groove, and the inner side wall of the first elastic sealing ring and the inner side wall of the second elastic sealing ring are both in sliding close contact with the outer side wall of the main shaft; a water inlet and a water outlet which are communicated with the annular cavity are formed in the side wall of the sleeve, and the water inlet is communicated with an external high-pressure water source. High-pressure water flow supplied by an external high-pressure water source can enter the annular cavity from the water inlet and then is discharged from the water outlet, the water flow in the annular cavity can take away alkali liquor on the outer side wall of the main shaft and cool the main shaft, and water can form a layer of water film on the outer side wall of the main shaft, so that the cooling effect of the main shaft is improved. And when the elastic sealing ring is in sliding contact with the elastic sealing ring I and the elastic sealing ring II, abrasion is not easy to generate.

Description

Technical Field

[0001] The utility model relates to the field of filters, and more specifically to a water-cooled sealing structure for the main shaft of an on-line lye filter. Background Art

[0002] On-line lye filters are widely used in many technical fields such as mechanical engineering, chemical industry, environmental protection, and water treatment. For example, in the production process of a brewery, since a large amount of lye is required to clean beer bottles, in order to reduce energy consumption and resource waste, a self-cleaning filter with high filtration performance is usually used to finely filter the lye, and after removing impurities and pollutants therein, it is recycled, so as to achieve the purposes of saving lye and water, reducing production costs, and protecting the environment.

[0003] During the operation of some existing lye filters, the rotation and telescoping of the main shaft will cause some lye to seep out from the rotary seal of the main shaft. The lye will scale on the outer side wall of the main shaft, which will further cause problems such as wear, aging, and embrittlement of the rubber seal on the main shaft, resulting in seal failure; in addition, the high-temperature lye transfers heat to the reduction motor through the main shaft, and the motor may be overloaded due to excessive temperature.

[0004] Therefore, how to provide a water-cooled sealing structure for the main shaft of an on-line lye filter to overcome the above problems is an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0005] In view of this, the utility model provides a water-cooled sealing structure for the main shaft of an on-line lye filter.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A water-cooled sealing structure for the main shaft of an on-line lye filter, the reduction motor of the on-line lye filter is fixed to the reduction gearbox, and the rotating and telescoping end of the reduction gearbox is connected to the main shaft of the on-line lye filter; it includes:

[0008] A sleeve, one end of the sleeve is hermetically fixed to the reduction gearbox, and the main shaft is coaxially arranged in the sleeve;

[0009] A sealing assembly, the sealing assembly includes an elastic sealing ring one and an elastic sealing ring two, the inner side wall of the sleeve is coaxially provided with a first annular groove and a second annular groove, the first annular groove is tightly fitted with the elastic sealing ring one inside, the second annular groove is tightly fitted with the elastic sealing ring two inside, and the inner side walls of the elastic sealing ring one and the elastic sealing ring two are both in sliding and tight contact with the outer side wall of the main shaft;

[0010] The inner sidewall of the sleeve, the outer sidewall of the main shaft, the first elastic sealing ring, and the second elastic sealing ring located between the first annular groove and the second annular groove together form a closed annular cavity. The sidewall of the sleeve is provided with a water inlet and a water outlet, both the water inlet and the water outlet communicate with the annular cavity, and the water inlet is connected to an external high-pressure water source.

[0011] As can be seen from the above technical solutions, compared with the prior art, the present utility model discloses a water-cooled sealing structure for the main shaft of an alkali solution in-line filter. In the present utility model, the high-pressure water flow supplied by the external high-pressure water source enters the annular cavity from the water inlet and then discharges from the water outlet. This process has three functions. The first is that the water flow in the annular cavity will carry away the alkali solution on the outer sidewall of the main shaft, avoiding corrosion damage to the first elastic sealing ring, the reduction gearbox, and the reduction motor. The second is that the water flow in the annular cavity can drive the heat of the main shaft, reduce the temperature of the main shaft, and thus ensure that the first elastic sealing ring, the reduction gearbox, and the reduction motor will not be overheated, improving the service life of the reduction motor, the first elastic sealing ring, and the second elastic sealing ring. The third is the lubricating effect, that is, the water can form a water film on the outer sidewall of the main shaft, making it not easy to generate wear when slidingly contacting the first elastic sealing ring and the second elastic sealing ring.

[0012] Preferably, a plurality of the first annular grooves and a plurality of the second annular grooves are equidistantly arranged along the pipe length direction of the sleeve, and the annular cavity is located between the first annular groove closest to the second annular groove and the second annular groove closest to the first annular groove. Designing a plurality of the first elastic sealing rings and the second elastic sealing rings can improve the sealing performance of the main shaft.

[0013] Preferably, there are two first annular grooves and two second annular grooves; the distance between two adjacent first annular grooves is the same as the distance between two adjacent second annular grooves; the distance between the first annular groove closest to the second annular groove and the second annular groove closest to the first annular groove is greater than the distance between two adjacent first annular grooves. The annular cavity has sufficient length to ensure sufficient contact area between the high-pressure water flow and the main shaft; adjacent two first annular grooves have appropriate spacing, and adjacent two second annular grooves have appropriate spacing.

[0014] Preferably, the cross-sectional shape of the first annular groove is the same as the cross-sectional shape of the second annular groove, the outer wall of the first elastic sealing ring can closely adhere to the inner wall of the first annular groove, and the outer wall of the second elastic sealing ring can closely adhere to the inner wall of the second annular groove. The sealing effect of the first elastic sealing ring and the second elastic sealing ring is good and the two can be reliably arranged.

[0015] Preferably, the cross-sectional shapes of the first annular groove and the second annular groove are both polygonal.

[0016] Preferably, the cross-sectional shape of the first annular groove and the cross-sectional shape of the second annular groove are both rectangular, and the cross-sectional shapes of the first elastic sealing ring and the second elastic sealing ring are both rectangular. The first elastic sealing ring and the second elastic sealing ring can be in reliable sliding and close contact with the outer side wall of the main shaft.

[0017] Preferably, the center line of the water inlet is collinear with the center line of the water outlet, and the center line of the water inlet is perpendicular to the center line of the casing. The water inlet and the water outlet can be reliably arranged.

[0018] Preferably, the center line of the water inlet is centrally arranged between the first annular groove and the second annular groove. The water flow flowing into the annular cavity from the water inlet can evenly fill the annular cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0020] Figure 1 is a schematic layout diagram of the water-cooled sealing structure of the main shaft of an alkali solution in-line filter, a reduction motor, and a reduction gearbox;

[0021] Figure 2 is a cross-sectional view of the water-cooled sealing structure of the main shaft of an alkali solution in-line filter.

[0022] In the figure:

[0023] 1 is a casing, 10 is the first annular groove, 11 is the second annular groove, 12 is the water inlet, 13 is the water outlet, 2 is the first elastic sealing ring, 3 is the second elastic sealing ring, 4 is the main shaft, 5 is the reduction motor, and 6 is the reduction gearbox. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] The utility model discloses a water-cooled sealing structure for the main shaft of an alkali solution on-line filter. The utility model installs a sleeve 1 on the main shaft 4. An annular groove one 10 and an annular groove two 11 are arranged in the sleeve 1. An elastic sealing ring one 2 and an elastic sealing ring two 3 are tightly embedded in the annular groove one 10 and the annular groove two 11 respectively. The elastic sealing ring one 2 and the elastic sealing ring two 3 are slidably and tightly sleeved on the main shaft 4. The inner side wall of the sleeve 1, the outer side wall of the main shaft 4, the elastic sealing ring one 2 and the elastic sealing ring two 3 jointly form a closed annular cavity. The side wall of the sleeve 1 is provided with a water inlet 12 and a water outlet 13 communicated with the annular cavity. The water inlet 12 is connected to an external high-pressure water source;

[0026] When the alkali solution on-line filter is running, the main shaft 4 makes a rotational telescopic movement. During the upward movement of the main shaft 4, the alkali solution on the outer side wall of the main shaft 4 may enter the annular cavity. Due to the design of the water inlet 12 and the water outlet 13, the high-pressure water flow supplied by the external high-pressure water source will enter the annular cavity from the water inlet 12 and then be discharged from the water outlet 13. This process has three functions. The first is that the water flow in the annular cavity will carry away the alkali solution on the outer side wall of the main shaft 4, avoiding the corrosion and damage of the elastic sealing ring one 2, the reduction gearbox 6 and the reduction motor 5 by the alkali solution. The second is that the water flow in the annular cavity can drive the heat of the main shaft 4 and reduce the temperature of the main shaft 4, thereby ensuring that the elastic sealing ring one 2, the reduction gearbox 6 and the reduction motor 5 will not be overheated. The third is the lubrication effect, that is, the water can form a water film on the outer side wall of the main shaft 4, making it not easy to generate wear when slidingly contacting with the elastic sealing ring one 2 and the elastic sealing ring two 3;

[0027] Both the elastic sealing ring one 2 and the elastic sealing ring two 3 are provided with a plurality of them, and this design can improve the sealing performance of the main shaft 4 and the annular cavity.

[0028] Embodiment

[0029] See the appendix Figure 1-2 It is a schematic diagram of the overall and partial structures of an embodiment of the utility model. The utility model specifically discloses a water-cooled sealing structure for the main shaft of an alkali solution on-line filter. The reduction motor 5 of the alkali solution on-line filter is fixed to the reduction gearbox 6. The rotational telescopic end of the reduction gearbox 6 is connected to the main shaft 4 of the alkali solution on-line filter. The main shaft 4 and the output rotating shaft of the reduction motor 5 are both vertically arranged. Specifically:

[0030] A nut is slidably connected inside the reduction gearbox 6. The sliding direction of the nut relative to the reduction gearbox 6 is the same as the axial length direction of the output rotating shaft of the reduction motor 5. The nut can only slide along the axial length direction of the output rotating shaft of the reduction motor 5 and cannot rotate itself; The output rotating shaft of the reduction motor 5 is coaxially fixed to a transmission screw, and the transmission screw is screwed to the nut;

[0031] The upper end of the main shaft 4 is rotatably connected to the nut, that is, when the main shaft 4 rotates, it will not drive the nut to rotate. The upper end of the main shaft 4 is also vertically slidably connected to the transmission screw, that is, when the main shaft 4 moves up and down with the nut, it will not drive the transmission screw to move up and down;

[0032] There are two proximity switches on the reduction gearbox 6, and the two proximity switches are arranged vertically in sequence. There are two induction surfaces on the nut. When the induction surfaces move, they can align with and trigger the proximity switches, so that the output rotating shaft of the reduction motor 5 can change the rotation direction in time; when each of the two proximity switches aligns with the two induction surfaces, the main shaft 4 is at the highest position. At this time, the rotation direction of the output rotating shaft of the reduction motor 5 starts to change, and the main shaft 4 starts to move down; when the upper induction surface aligns with the lower proximity switch, the main shaft 4 is at the lowest position. At this time, the rotation direction of the output rotating shaft of the reduction motor 5 starts to change, and the main shaft 4 starts to move up;

[0033] When the reduction motor 5 drives the transmission screw to rotate, since the transmission screw is screwed to the nut and the nut cannot rotate relative to the reduction gearbox 6, the nut will drive the main shaft 4 to move up and down. At the same time, the transmission screw can drive the main shaft 4 to rotate. Since the main shaft 4 is slidably connected to the transmission screw, the main shaft 4 will not drive the transmission screw to move up and down when moving up and down; the above design can realize the rotational telescoping of the main shaft 4.

[0034] The sealing structure includes:

[0035] A sleeve 1, one end of the sleeve 1 is fixedly sealed to the reduction gearbox 6, and the main shaft 4 is coaxially arranged in the sleeve 1;

[0036] A sealing assembly, the sealing assembly includes an elastic sealing ring one 2 and an elastic sealing ring two 3. The inner side wall of the sleeve 1 is coaxially provided with an annular groove one 10 and an annular groove two 11. The annular groove one 10 is located above the annular groove two 11. The elastic sealing ring one 2 is tightly embedded in the annular groove one 10, and the elastic sealing ring two 3 is tightly embedded in the annular groove two 11. The inner side walls of the elastic sealing ring one 2 and the elastic sealing ring two 3 are both in sliding and tight contact with the outer side wall of the main shaft 4; the elastic sealing ring one 2 and the elastic sealing ring two 3 can be reliably installed in the sleeve 1. When the main shaft 4 rotates and telescopes, the elastic sealing ring one 2 and the elastic sealing ring two 3 will not move vertically relative to the sleeve 1;

[0037] The inner side wall of the casing 1, the outer side wall of the main shaft 4, the first elastic sealing ring 2, and the second elastic sealing ring 3 located between the first annular groove 10 and the second annular groove 11 together form a closed annular cavity. The side wall of the casing 1 is provided with a water inlet 12 and a water outlet 13, both of which are communicated with the annular cavity, and the water inlet 12 is connected to an external high-pressure water source; when the lye in-line filter is operating, the main shaft 4 performs a rotational telescopic action. During the upward movement of the main shaft 4, the lye on the outer side wall of the main shaft 4 may enter the annular cavity. Due to the design of the water inlet 12 and the water outlet 13, the high-pressure water flow supplied by the external high-pressure water source will enter the annular cavity from the water inlet 12 and then be discharged from the water outlet 13. This process has three functions. The first is that the water flow in the annular cavity will carry away the lye on the outer side wall of the main shaft 4, preventing the lye from corroding and damaging the first elastic sealing ring 2, the reduction gearbox 6, and the reduction motor 5. The second is that the water flow in the annular cavity can carry away the heat of the main shaft 4, reducing the temperature of the main shaft 4, and thus ensuring that the first elastic sealing ring 2, the reduction gearbox 6, and the reduction motor 5 will not be overheated, improving the service life of the reduction motor 5, the first elastic sealing ring 2, and the second elastic sealing ring 3. The third is the lubrication function, that is, the water can form a water film on the outer side wall of the main shaft 4, making it not easy to generate wear when slidingly contacting the first elastic sealing ring 2 and the second elastic sealing ring 3.

[0038] Both the first annular groove 10 and the second annular groove 11 are provided with a plurality of equidistant grooves along the pipe length direction of the casing 1. The annular cavity is located between the first annular groove 10 closest to the second annular groove 11 and the second annular groove 11 closest to the first annular groove 10; the design of multiple first elastic sealing rings 2 and second elastic sealing rings 3 can improve the sealing performance of the main shaft 4.

[0039] In this embodiment, there are two first annular grooves 10 and two second annular grooves 11; the distance between two adjacent first annular grooves 10 is the same as the distance between two adjacent second annular grooves 11; the distance between the first annular groove 10 closest to the second annular groove 11 and the second annular groove 11 closest to the first annular groove 10 is greater than the distance between two adjacent first annular grooves 10; the annular cavity has sufficient length to ensure that the high-pressure water flow has sufficient contact area with the main shaft 4; the adjacent two first annular grooves 10 have appropriate spacing, and the adjacent two second annular grooves 11 have appropriate spacing to ensure the sealing effect of the first elastic sealing ring 2 and the second elastic sealing ring 3 on the main shaft 4.

[0040] The cross-sectional shape of the first annular groove 10 is the same as the cross-sectional shape of the second annular groove 11. The outer wall of the first elastic sealing ring 2 can closely adhere to the inner wall of the first annular groove 10, and the outer wall of the second elastic sealing ring 3 can closely adhere to the inner wall of the second annular groove 11. This design ensures the sealing effect of the first elastic sealing ring 2 and the second elastic sealing ring 3.

[0041] The groove cross-sectional shapes of both the first annular groove 10 and the second annular groove 11 are polygonal. In this embodiment, the groove cross-sectional shapes of both the first annular groove 10 and the second annular groove 11 are rectangular, and the cross-sectional shapes of both the first elastic sealing ring 2 and the second elastic sealing ring 3 are rectangular; the first elastic sealing ring 2 and the second elastic sealing ring 3 can be in reliable sliding and close contact with the outer sidewall of the main shaft 4.

[0042] The centerlines of the water inlet 12 and the water outlet 13 are collinear, and the centerline of the water inlet 12 is perpendicular to the pipe centerline of the casing 1; the water inlet 12 and the water outlet 13 can be reliably arranged, and the water flowing into the annular cavity from the water inlet 12 can uniformly and quickly fill the annular cavity, ensuring the heat dissipation and the flushing effect on the lye.

[0043] The centerline of the water inlet 12 is arranged in the middle between the first annular groove 10 and the second annular groove 11; the water flowing into the annular cavity from the water inlet 12 can uniformly fill the annular cavity.

[0044] When this water-cooled sealing structure is in use, an external high-pressure water source continuously injects high-pressure water flow into the annular cavity. The water flow in the annular cavity exchanges heat with the main shaft 4 and takes away the lye attached to the main shaft 4. The water flow in the annular cavity flows out from the water outlet 13 to the waste liquid pool.

[0045] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A water-cooled sealing structure for the main shaft of an on-line lye filter. The reduction motor (5) of the on-line lye filter is fixed to the reduction gearbox (6), and the rotating and telescopic end of the reduction gearbox (6) is connected to the main shaft (4) of the on-line lye filter; it is characterized in that, Comprising: A sleeve (1), one end of the sleeve (1) is fixedly sealed with the reduction gearbox (6), and the main shaft (4) is coaxially arranged in the sleeve (1); A sealing assembly, the sealing assembly includes an elastic sealing ring one (2) and an elastic sealing ring two (3), an annular groove one (10) and an annular groove two (11) are coaxially arranged on the inner side wall of the sleeve (1), the elastic sealing ring one (2) is tightly embedded inside the annular groove one (10), the elastic sealing ring two (3) is tightly embedded inside the annular groove two (11), and the inner side walls of the elastic sealing ring one (2) and the elastic sealing ring two (3) are both in sliding and tight contact with the outer side wall of the main shaft (4); The inner side wall of the sleeve (1), the outer side wall of the main shaft (4), the elastic sealing ring one (2) and the elastic sealing ring two (3) between the annular groove one (10) and the annular groove two (11) together form a closed annular cavity, a water inlet (12) and a water outlet (13) are arranged on the side wall of the sleeve (1), the water inlet (12) and the water outlet (13) are both communicated with the annular cavity, and the water inlet (12) is connected to an external high-pressure water source.

2. The water-cooled sealing structure of the main shaft of the lye in-line filter according to claim 1, characterized in that, A plurality of the annular grooves one (10) and the annular grooves two (11) are both equidistantly arranged along the pipe length direction of the sleeve (1), and the annular cavity is between the annular groove one (10) closest to the annular groove two (11) and the annular groove two (11) closest to the annular groove one (10).

3. The water-cooled sealing structure of the main shaft of the lye in-line filter according to claim 2, characterized in that, There are two annular grooves one (10) and two annular grooves two (11); the distance between two adjacent annular grooves one (10) is the same as the distance between two adjacent annular grooves two (11); the distance between the annular groove one (10) closest to the annular groove two (11) and the annular groove two (11) closest to the annular groove one (10) is greater than the distance between two adjacent annular grooves one (10).

4. The water-cooled sealing structure of the main shaft of the lye in-line filter according to claim 1 is characterized in that, The groove cross-sectional shape of the annular groove one (10) is the same as the groove cross-sectional shape of the annular groove two (11), the outer wall of the elastic sealing ring one (2) can be closely attached to the inner wall of the groove of the annular groove one (10), and the outer wall of the elastic sealing ring two (3) can be closely attached to the inner wall of the groove of the annular groove two (11).

5. The water-cooled sealing structure of the main shaft of the lye in-line filter according to claim 4, characterized in that, The groove cross-sectional shape of the annular groove one (10) and the groove cross-sectional shape of the annular groove two (11) are both polygonal.

6. The water-cooled sealing structure of the main shaft of the lye in-line filter according to claim 4, characterized in that, The groove cross-sectional shape of the annular groove one (10) and the groove cross-sectional shape of the annular groove two (11) are both rectangular, and the cross-sectional shape of the elastic sealing ring one (2) and the cross-sectional shape of the elastic sealing ring two (3) are both rectangular.

7. The water-cooled sealing structure of the main shaft of the lye in-line filter according to claim 4, characterized in that, The center line of the water inlet (12) is collinear with the center line of the water outlet (13), and the center line of the water inlet (12) is perpendicular to the pipe center line of the sleeve (1).

8. The water-cooled sealing structure of the main shaft of the lye in-line filter according to claim 7, wherein, The center line of the water inlet (12) is centrally arranged between the annular groove one (10) and the annular groove two (11).

Images