Rotating shaft sealing device of vertical crusher

Abstract

The vertical crusher rotating shaft sealing device comprises a bearing seat, an upper annular sealing disc, a lower annular sealing disc and a lower sealing cover, the upper annular sealing disc is fixedly connected with a rotating shaft, a plurality of annular grooves are concentrically formed in the upper surface of the lower annular sealing disc from inside to outside, and a convex ring structure is correspondingly arranged on the lower surface of the upper annular sealing disc; the upper annular sealing disc and the lower annular sealing disc are assembled in an embedded mode through the convex ring structure, and a gap is formed between the convex ring structure and the annular groove, so that an annular communicating labyrinth type cavity is formed between the upper annular sealing disc and the lower annular sealing disc. And an air inlet pipe communicated with the interior of the innermost annular groove is arranged on one side of the lower annular sealing disc. The installation thought of the sludge crusher rotating shaft on the bearing seat is changed again, a new part structure is ingeniously added, the problem of the filler sealing defect of the sludge crusher rotating shaft is effectively solved, and the sealing technology of the sludge crusher rotating shaft bearing seat is more mature.

Description

Technical Field

[0001] The present application relates to the technical field of sludge crushing equipment, and in particular to a vertical crusher shaft sealing device. Background Art

[0002] Traditional shaft end sealing methods include packing, oil seal, mechanical seal, and some special sealing structures, etc. However, because the sealing materials in the sludge treatment industry are mainly solid dust, and it is rare to ensure that the seals are adequately lubricated, coupled with cost constraints, many sealing structures are not applicable. At present, the sealing method in the sludge treatment industry mostly adopts packing seal.

[0003] The packing seal structure includes a main shaft, a wall plate, a packing seat, a packing and a packing gland. The main shaft passes through the equipment wall plate and the packing seat at the same time. The packing seat is fixed to the outside of the equipment wall plate by bolts. The outside of the packing seat is an annular cavity, and various packings are filled into the cavity. The packing gland is fixed to the packing seat by bolts. The annular protrusion of the gland squeezes the packing, causing the packing to deform laterally and hold the main shaft tightly to form a radial seal.

[0004] During operation, the main shaft rotates and produces relative motion with the packing. Since the main shaft is harder than the packing, the packing will wear out after a period of time, and a gap will be formed between the main shaft and the material, which will make the situation worse and wear the main shaft surface. Since the packing has poor elasticity and cannot form self-compensation, it is necessary to tighten the gland bolts manually to make the packing deform laterally again to produce a sealing effect.

[0005] In addition, in the sludge treatment industry, especially in a vertical sludge crushing device, the bearing seat of the rotating shaft is in the crushing chamber of the crusher. The complex internal working environment and the high rotation speed of the crusher shaft increase the relative movement speed between the filler and the rotating shaft, thereby accelerating the wear. At the same time, with the increased friction between the rotating shaft and the filler, it is easy to increase the temperature, which affects the performance of the packing sealing material. The overall life is shortened and frequent maintenance or replacement is required. For this reason, the utility model proposes a vertical crusher rotating shaft sealing device. Utility Model Content

[0006] The embodiment of the present application provides a vertical crusher shaft sealing device, which effectively solves the defect problem of the packing seal of the sludge crusher shaft.

[0007] In view of this, the present application provides a vertical crusher shaft sealing device, comprising: a bearing seat, an upper annular sealing disc, a lower annular sealing disc and a lower sealing cover;

[0008] The upper annular sealing disk is fixedly connected to the rotating shaft;

[0009] The lower annular sealing disk and the lower sealing cover are detachably mounted on the top and bottom of the bearing seat respectively;

[0010] The upper surface of the lower annular sealing disk is concentrically provided with a plurality of annular grooves from the inside to the outside;

[0011] The lower surface of the upper annular sealing disk is correspondingly provided with a convex ring structure for fitting and assembling with the annular groove;

[0012] The upper annular sealing disk is assembled with the lower annular sealing disk through the convex ring structure, and there is a gap between the convex ring structure and the annular groove, so that an annular labyrinth chamber connected with the upper annular sealing disk is formed between the upper annular sealing disk and the lower annular sealing disk;

[0013] An air inlet pipe is arranged on one side of the lower annular sealing disc;

[0014] The air inlet pipe is in communication with the innermost annular groove;

[0015] An oil seal is installed in the middle of the lower annular sealing disc;

[0016] An upper bearing and a lower bearing are installed in the bearing seat;

[0017] A spacer sleeve is installed between the upper bearing and the lower bearing;

[0018] The rotating shaft passes through the oil seal, the upper bearing and the lower bearing in sequence from top to bottom, and is connected to the lower bearing through a pre-tightening connection assembly.

[0019] Optionally, a filling nipple for filling lubricating oil is provided at the bottom of the lower sealing cover.

[0020] Optionally, an air inlet hole is provided at the bottom of the annular groove located at the innermost side of the lower annular sealing disk;

[0021] The air inlet pipe is communicated with the air inlet hole.

[0022] Optionally, the lower annular sealing disk and the lower sealing cover are connected to the bearing seat by bolts, and sealing gaskets are provided between the lower annular sealing disk and the bearing seat, and between the lower sealing cover and the bearing seat.

[0023] Optionally, a plurality of screw countersunk holes are evenly arranged along the circumferential direction at the bottom of the annular groove located at the outermost side of the lower annular sealing disk.

[0024] Optionally, the number of the convex ring structures is one more than the number of the annular grooves.

[0025] Optionally, the number of the annular grooves is 3, and the number of the convex ring structures is 4.

[0026] Optionally, the pre-tightening connection assembly includes a round nut and a stop washer.

[0027] Optionally, the rotating shaft is welded to the upper annular sealing disk.

[0028] Optionally, the bearing seat, the upper annular sealing disk, the lower annular sealing disk and the lower sealing cover are all made of carbon steel.

[0029] It can be seen from the above technical scheme that the embodiment of the present application has the following advantages: the vertical crusher shaft sealing device comprises a bearing seat, an upper annular sealing disk, a lower annular sealing disk and a lower sealing cover. When in use, due to the centrifugal force generated by the high-speed operation of the upper annular sealing disk and the shaft, dust or sludge will be thrown out once it contacts the upper annular sealing disk, and at the same time, high-pressure gas can be added to the side of the lower annular sealing disk through the air inlet pipe, so that the gas fills the entire annularly connected labyrinth chamber and is sprayed out from all sides of the labyrinth chamber to play an air-sealing role; coupled with the oil seal installed in the middle of the lower annular sealing disk, it can play a double protection, further ensuring the sealing of the shaft. In addition, under the air-sealing effect of the labyrinth chamber, the oil seal will also be better protected, and its service life will be longer, which can greatly reduce the frequency of equipment maintenance and replacement of seals, and the rotating parts and bearings can also be better protected, so that the overall operation is stable and not prone to failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of a vertical crusher shaft sealing device in an embodiment of the present application;

[0031] Figure 2 This is a schematic diagram of the structure of the lower annular sealing disk in the embodiment of the present application;

[0032] Figure 3 for Figure 2 Cross-sectional view in the mid-SS direction;

[0033] Figure 4 This is a schematic diagram of the use of a vertical crusher shaft sealing device in an embodiment of the present application;

[0034] Wherein, the accompanying drawings are marked as follows:

[0035] 1-shaft, 2-upper annular sealing disk, 201-annular groove, 202-screw countersunk hole, 203-inlet hole, 3-oil seal, 4-inlet pipe, 5-lower annular sealing disk, 6-sealing gasket, 7-bearing seat, 8-spacer, 9-upper bearing, 10-lower sealing cover, 11-oil nozzle, 12-round nut, 13-stop washer, 14-lower bearing, 15-casing, 16-bearing seat bracket. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] This application provides an embodiment of a vertical crusher shaft sealing device. Figures 1 to 3 .

[0040] The vertical crusher shaft sealing device in this embodiment includes: a bearing seat 7, an upper annular sealing disk 2, a lower annular sealing disk 5 and a lower sealing cover 10. The upper annular sealing disk 2 is fixedly connected to the shaft 1, and the lower annular sealing disk 5 and the lower sealing cover 10 are detachably installed on the top and bottom of the bearing seat 7, respectively. The upper surface of the lower annular sealing disk 5 is concentrically provided with a plurality of annular grooves 201 from the inside to the outside, and the lower surface of the upper annular sealing disk 2 is correspondingly provided with a convex ring structure for fitting with the annular groove 201. The upper annular sealing disk 2 is fitted together with the lower annular sealing disk 5 through the convex ring structure. The convex ring structure and the annular groove 201 have a gap therebetween, so that a labyrinth-type chamber connected in an annular shape is formed between the upper annular sealing disk 2 and the lower annular sealing disk 5; an air inlet pipe 4 is arranged on one side of the lower annular sealing disk 5, and the air inlet pipe 4 is connected to the inner part of the innermost annular groove 201; an oil seal 3 is installed in the middle of the lower annular sealing disk 5, an upper bearing 9 and a lower bearing 14 are installed in the bearing seat 7, and a spacer sleeve 8 is installed between the upper bearing 9 and the lower bearing 14. After the rotating shaft 1 passes through the oil seal 3, the upper bearing 9 and the lower bearing 14 from top to bottom in sequence, it is connected to the lower bearing 14 through a pre-tightening connection assembly.

[0041] It should be noted that the shaft sealing device of the vertical crusher includes a bearing seat 7, an upper annular sealing disk 2, a lower annular sealing disk 5 and a lower sealing cover 10. When in use, due to the centrifugal force generated by the high-speed rotation of the upper annular sealing disk 2 and the shaft 1, dust or sludge will be thrown out once it contacts the upper annular sealing disk 2, and at the same time, high-pressure gas can be added to the side of the lower annular sealing disk 5 through the air inlet pipe 4, so that the gas fills the entire annularly connected labyrinth chamber and is sprayed out from all sides of the labyrinth chamber to play an air-sealing role; coupled with the oil seal 3 installed in the middle of the lower annular sealing disk 5, it can play a double protection, further ensuring the sealing of the shaft 1. In addition, under the air-sealing effect of the labyrinth chamber, the oil seal 3 will also be better protected, and its service life will be longer, which can greatly reduce the frequency of equipment maintenance and replacement of seals, and the rotating bearings can also be better protected, so that the overall operation is stable and not prone to failure.

[0042] The above is the first embodiment of a vertical crusher shaft sealing device provided by the embodiment of the present application. The following is the second embodiment of a vertical crusher shaft sealing device provided by the embodiment of the present application. For details, please refer to Figures 1 to 4 .

[0043] The vertical crusher shaft sealing device in this embodiment includes: a bearing seat 7, an upper annular sealing disc 2, a lower annular sealing disc 5 and a lower sealing cover 10, the upper annular sealing disc 2 is fixedly connected to the shaft 1, the lower annular sealing disc 5 and the lower sealing cover 10 are detachably mounted on the top and bottom of the bearing seat 7, respectively, the upper surface of the lower annular sealing disc 5 is concentrically provided with a plurality of annular grooves 201 from the inside to the outside, the lower surface of the upper annular sealing disc 2 is correspondingly provided with a convex ring structure for fitting with the annular groove 201, the upper annular sealing disc 2 is fitted together with the lower annular sealing disc 5 through the convex ring structure, and the convex ring structure and the annular groove 201 are connected. There is a certain gap between them, so that a ring-shaped labyrinth chamber is formed between the upper annular sealing disk 2 and the lower annular sealing disk 5 (the rotation of the rotating shaft 1 drives the upper annular sealing disk 2 without affecting the lower annular sealing disk 5); an air intake pipe 4 is arranged on one side of the lower annular sealing disk 5, and the air intake pipe 4 is connected to the inner part of the innermost annular groove 201; an oil seal 3 is installed in the middle of the lower annular sealing disk 5, an upper bearing 9 and a lower bearing 14 are installed in the bearing seat 7, and a spacer sleeve 8 is installed between the upper bearing 9 and the lower bearing 14. After the rotating shaft 1 passes through the oil seal 3, the upper bearing 9 and the lower bearing 14 from top to bottom in sequence, it is connected to the lower bearing 14 through a pre-tightening connection assembly.

[0044] It should be noted that the high-speed rotating shaft 1 drives the upper annular sealing disk 2 to rotate and generate centrifugal force. Once the dust or fine sludge falling in the crushing chamber contacts the upper annular sealing disk 2, it will be thrown out. In addition, the double protection of the labyrinth-type air seal and the oil seal 3 makes the device suitable for the harsh working environment in the crushing chamber, reducing the frequency of equipment maintenance and seal replacement. At the same time, the rotating bearing is better sealed and protected, and the overall operation is more stable and less prone to failure.

[0045] It can be understood that by providing an air inlet pipe 4 on one side of the lower annular sealing disk 5 and connecting the air inlet pipe 4 with the innermost annular groove 201, when high-pressure gas is connected, the gas enters the innermost annular groove 201 through the air inlet pipe 4, and quickly fills the entire annularly connected maze-shaped chamber, wherein the airflow will flow in a labyrinth-like manner from the inside to the outside, and be ejected from the outermost gap between the upper annular sealing disk 2 and the lower annular sealing disk 5, which can effectively prevent dust from entering and make the air sealing effect better.

[0046] A filling nozzle 11 for filling lubricating oil is arranged at the bottom of the lower sealing cover 10, so that the oil seal 3 can be lubricated with lubricating oil in the chamber of the bearing seat 7 to increase its service life; specifically, the material of the filling nozzle 11 can be stainless steel.

[0047] An air inlet hole 203 is formed at the bottom of the annular groove 201 located at the innermost side of the lower annular sealing disk 5 , and the air inlet pipe 4 is connected to the air inlet hole 203 .

[0048] The lower annular sealing disk 5 and the lower sealing cover 10 are connected to the bearing seat 7 by bolts, and sealing gaskets 6 are arranged between the lower annular sealing disk 5 and the bearing seat 7 and between the lower sealing cover 10 and the bearing seat 7.

[0049] The bottom of the annular groove 201 located at the outermost side of the lower annular sealing disk 5 is evenly provided with a plurality of screw countersunk holes 202 along the circumferential direction. The screw countersunk holes 202 are used to cooperate with bolts to realize the connection between the lower annular sealing disk 5 and the bearing seat 7 .

[0050] The number of the convex ring structures is one more than the number of the annular grooves 201 .

[0051] In this embodiment, the number of the annular grooves 201 is three, and the number of the convex ring structures is four.

[0052] The pre-tightening connection assembly includes a round nut 12 and a locking washer 13 , and the lower end of the rotating shaft 1 is connected to the lower bearing 14 through the round nut 12 and the locking washer 13 .

[0053] The rotating shaft 1 is welded to the upper annular sealing disk 2 .

[0054] The bearing seat 7, the air intake pipe 4, the spacer 8, the upper annular sealing disc 2, the lower annular sealing disc 5 and the lower sealing cover 10 can all be made of carbon steel and can be processed on a common lathe, which is simple to manufacture and has a low manufacturing cost.

[0055] During specific implementation, the device is installed in the casing 15 of the vertical crusher, wherein the casing 15 includes an upper mud inlet and a lower mud outlet, the device is located above the lower mud outlet, and the side of the bearing seat 7 is fixed to the bearing seat bracket 16.

[0056] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A vertical crusher shaft sealing device, characterized in that: include: A bearing seat, an upper annular sealing disc, a lower annular sealing disc and a lower sealing cover; The upper annular sealing disk is fixedly connected to the rotating shaft; The lower annular sealing disk and the lower sealing cover are detachably mounted on the top and bottom of the bearing seat respectively; The upper surface of the lower annular sealing disk is concentrically provided with a plurality of annular grooves from the inside to the outside; The lower surface of the upper annular sealing disk is correspondingly provided with a convex ring structure for fitting and assembling with the annular groove; The upper annular sealing disk is assembled with the lower annular sealing disk through the convex ring structure, and there is a gap between the convex ring structure and the annular groove, so that an annular labyrinth chamber connected with the upper annular sealing disk is formed between the upper annular sealing disk and the lower annular sealing disk; An air inlet pipe is arranged on one side of the lower annular sealing disc; The air inlet pipe is in communication with the innermost annular groove; An oil seal is installed in the middle of the lower annular sealing disc; An upper bearing and a lower bearing are installed in the bearing seat; A spacer sleeve is installed between the upper bearing and the lower bearing; The rotating shaft passes through the oil seal, the upper bearing and the lower bearing in sequence from top to bottom, and is connected to the lower bearing through a pre-tightening connection assembly.

2. The vertical crusher shaft sealing device according to claim 1, characterized in that: A filling nozzle for filling lubricating oil is arranged at the bottom of the lower sealing cover.

3. The vertical crusher shaft sealing device according to claim 1, characterized in that: An air inlet hole is provided at the bottom of the annular groove located at the innermost side of the lower annular sealing disk; The air inlet pipe is communicated with the air inlet hole.

4. The vertical crusher shaft sealing device according to claim 1, characterized in that: The lower annular sealing disk and the lower sealing cover are both connected to the bearing seat by bolts, and sealing gaskets are arranged between the lower annular sealing disk and the bearing seat, and between the lower sealing cover and the bearing seat.

5. The vertical crusher shaft sealing device according to claim 4, characterized in that: A plurality of screw countersunk holes are evenly arranged along the circumferential direction at the bottom of the annular groove located at the outermost side of the lower annular sealing disk.

6. The vertical crusher shaft sealing device according to claim 1, characterized in that: The number of the convex ring structures is one greater than the number of the annular grooves.

7. The vertical crusher shaft sealing device according to claim 1, characterized in that: The number of the annular grooves is 3, and the number of the convex ring structures is 4.

8. The vertical crusher shaft sealing device according to claim 1, characterized in that: The pre-tightening connection assembly comprises a round nut and a stop washer.

9. The vertical crusher shaft sealing device according to claim 1, characterized in that: The rotating shaft is welded to the upper annular sealing disk.

10. The vertical crusher shaft sealing device according to claim 1, characterized in that: The bearing seat, the upper annular sealing disk, the lower annular sealing disk and the lower sealing cover are all made of carbon steel.

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