Sealing structure of rotary sealing valve

Abstract

The utility model relates to the technical field of mechanical sealing, and provides a sealing structure of a rotary sealing valve, which comprises a shell and a rotor rotationally arranged on the shell, and the rotor penetrates through the shell; the first sealing ring is arranged on the shell; the second sealing ring is arranged on the rotor, the first sealing ring, the second sealing ring and the shell form a sealing cavity, the rotor penetrates through the sealing cavity, and the first sealing ring and the second sealing ring are in rotary sealing connection with the rotor; the number of the first sealing rings and the number of the second sealing rings are both two, the two first sealing rings are symmetrically arranged on the two sides of the shell, and the two second sealing rings are symmetrically arranged on the two sides of the rotor. The second sealing ring comprises a plurality of sealing blocks, the plurality of sealing blocks are arranged on the rotor in a circumferential array mode, the plurality of sealing blocks are connected end to end, and the sealing blocks and the rotor are in rotary sealing. According to the technical scheme, the problems that sealing structures at the two ends of the rotor are prone to damage and the sealing effect is low in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a sealing structure of a rotary sealing valve. Background Art

[0002] The rotary sealing valve is a key component of the CDQ discharging equipment. It is installed below the vibrating feeder and continuously discharges the coke cooled to below 250°C. The rotary sealing valve can prevent harmful gases from leaking into the surrounding environment during the coke discharging process.

[0003] In conventional rotary sealing valves, a contact sealing structure is used on both sides of the rotor. The sealing surfaces need to be lubricated with grease, and nitrogen is needed for auxiliary sealing to prevent dust and coke powder from entering the sealing cavities at both ends. If lubrication blockage or lubrication failure occurs, the contact seal will be accelerated. Wear or damage. Once the nitrogen sealing flow is not enough to prevent dust and coke powder from entering the sealing cavity, it will cause damage to the rotor bearings, causing the equipment to be damaged and unusable. Utility Model Content

[0004] The utility model provides a sealing structure of a rotary sealing valve, which solves the problems in the related art that the sealing structures at both ends of a rotor are easily damaged and the sealing effect is low.

[0005] The technical solution of the utility model is as follows:

[0006] A sealing structure of a rotary sealing valve, comprising:

[0007] A first sealing ring, arranged on the housing;

[0008] The second sealing ring is arranged on the rotor. The first sealing ring, the second sealing ring and the housing form a sealing cavity. The rotor passes through the sealing cavity. The first sealing ring, the second sealing ring and the rotor are connected in a rotating sealing manner.

[0009] Optionally, there are two of each of the first sealing ring and the second sealing ring, the two first sealing rings are symmetrically arranged on both sides of the housing, and the two second sealing rings are symmetrically arranged on both sides of the rotor.

[0010] Optionally, the second sealing ring includes:

[0011] There are a plurality of sealing blocks, which are arranged in a circumferential array on the rotor, and are connected to each other, and a rotary seal is formed between the sealing blocks and the rotor.

[0012] Optionally, the second sealing ring further includes:

[0013] A convex block is arranged on the sealing block, the convex block is located in the shell, the convex block has a plurality of discharge grooves on a side away from the rotor, the plurality of discharge grooves are distributed in a circle with the rotor axis as the center, and the discharge grooves are connected to the inside of the shell.

[0014] Optionally, it also includes:

[0015] A bracket, arranged on the housing;

[0016] The rotating connecting member is arranged on the bracket, and the rotor is rotatably arranged on the bracket through the rotating connecting member.

[0017] Optionally, there are two brackets, and the two brackets are symmetrically arranged on the shell.

[0018] Optionally, the rotor comprises:

[0019] A rotating shaft, rotatably disposed on the bracket;

[0020] There are a plurality of partition plates, which are arranged on the rotating shaft at circumferential intervals, and a material storage area is formed between two adjacent partition plates.

[0021] The working principle and beneficial effects of the utility model are:

[0022] In the utility model, the first sealing ring strengthens the sealing effect of the sealing structure, can reduce dust and coke powder entering the sealing cavity, and strengthens the protection of the rotor bearing. The second sealing ring is rotatably sealed and connected to the rotor end, eliminating grease lubrication, simple and convenient maintenance, reliable use, and protects the rotor bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0024] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model before improvement;

[0025] Figure 2 for Figure 1 A schematic diagram of the local enlarged structure at position I in the middle;

[0026] Figure 3 This is a schematic diagram of the improved cross-sectional structure of the utility model;

[0027] Figure 4 For this utility model Figure 3 A schematic diagram of the local enlarged structure at II in the middle;

[0028] Figure 5It is a three-dimensional structural schematic diagram of the second sealing ring in the utility model;

[0029] Figure 6 It is a three-dimensional structural schematic diagram of the sealing block in the utility model;

[0030] Figure 7 It is a three-dimensional structural schematic diagram of the rotor in the utility model;

[0031] In the figure, 1. casing; 2. rotor; 201. rotating shaft; 202. partition plate; 203. material storage area; 3. first sealing ring; 4. second sealing ring; 401. sealing block; 402. protrusion; 403. discharge trough; 5. sealing chamber; 6. bracket; 7. rotating connecting part; 8. grease; 9. retaining ring; 10. metal packing. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0033] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0034] In this article, it should be noted that, 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 it can be indirectly connected 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 utility model can be understood according to specific circumstances.

[0035] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] like Figure 1 to Figure 7As shown, this embodiment proposes a sealing structure of a rotary sealing valve, including: a housing 1 and a rotor 2 rotatably arranged on the housing 1, and the rotor 2 passes through the housing 1; a first sealing ring 3 is arranged on the housing 1; a second sealing ring 4 is arranged on the rotor 2, the first sealing ring 3, the second sealing ring 4 and the housing 1 form a sealing cavity 5, the rotor 2 passes through the sealing cavity 5, and the first sealing ring 3 and the second sealing ring 4 are connected to the rotor 2 in a rotating sealing manner.

[0037] In this embodiment, the housing 1 is hollow internally, and the rotor 2 rotates inside the housing 1 ; the gap between the bearing of the rotor 2 and the housing 1 is a key sealing area, which needs to be effectively sealed by the first sealing ring 3 and the second sealing ring 4 .

[0038] In this embodiment, the first sealing ring 3 is arranged outside the housing 1, and its main function is to prevent dust and coke powder from leaking from the gap between the housing 1 and the rotor 2. The second sealing ring 4 is arranged on the rotor 2 and is located between the first sealing ring 3 and the housing 1. The second sealing ring 4 and the first sealing ring 3 together form a sealing cavity 5, and the rotor 2 passes through the sealing cavity 5. The second sealing ring 4 and the rotor 2 form a dynamic seal to reduce the leakage of dust and coke powder into the sealing cavity 5 and damage to the bearing of the rotor 2, eliminate the lubrication of the grease 8, eliminate the coordination of the retaining ring 9 and the metal packing 10, reduce the number of sealing parts, reduce the cost, and make maintenance simple and convenient, reliable to use, and protect the bearing of the rotor 2.

[0039] Optionally, there are two first sealing rings 3 and two second sealing rings 4 , and the two first sealing rings 3 are symmetrically arranged on both sides of the housing 1 , and the two second sealing rings 4 are symmetrically arranged on both sides of the rotor.

[0040] In this embodiment, two first sealing rings 3 and second sealing rings 4 are provided and symmetrically distributed on both sides of the housing 1 and both sides of the rotor 2, thereby improving the redundancy of the seal. Even if one of the sealing rings fails, the other sealing ring can still maintain an effective seal, which is also beneficial to balancing the sealing pressure on both sides, improving the sealing stability, and enhancing the reliability and safety of the seal.

[0041] Optionally, the second sealing ring 4 includes: a plurality of sealing blocks 401 , which are arranged in a circumferential array on the rotor 2 , and the plurality of sealing blocks 401 are connected to each other, and a rotating seal is formed between the sealing blocks 401 and the rotor 2 .

[0042] Optionally, the second sealing ring 4 also includes: a protrusion 402 is arranged on the sealing block 401, the protrusion 402 is located in the outer shell 1, and the protrusion 402 has a plurality of discharge grooves 403 on the side away from the rotor 2, and the plurality of discharge grooves 403 are distributed in a circle with the axis of the rotor 2 as the center, and the discharge grooves 403 are connected to the inside of the outer shell 1.

[0043] In this embodiment, the second sealing ring 4 is composed of a plurality of sealing blocks 401 arranged in a circumferential array and connected in the first position. Each sealing block 401 can independently bear part of the sealing pressure, disperse the load of a single sealing element, and extend the sealing life. At the same time, if a sealing block 401 is worn or damaged, only the corresponding sealing block 401 needs to be replaced, without replacing the entire second sealing ring 4, thereby reducing maintenance costs. A rotating sealing connection is formed between each sealing block 401 and the rotor 2 to ensure that dust and coke powder cannot leak through the gap between the sealing block 401 and the rotor 2 when the rotor 2 rotates. It should be noted that the sealing block 401 can be made of a wear-resistant and high-temperature resistant hard material, and processed into a shape that matches the bearing of the rotor 2 to achieve a good contact seal.

[0044] In this embodiment, the discharge groove 403 is used to collect a small amount of dust and coke powder seeping from the sealing surface, reducing the accumulation of dust and coke powder near the sealing surface and affecting the sealing performance. At the same time, the existence of the discharge groove 403 is also conducive to cooling the sealing surface, reducing the temperature of the sealing surface, and extending the sealing life.

[0045] Optionally, it further includes: a bracket 6 is arranged on the housing 1; a rotating connecting member 7 is arranged on the bracket 6, and the rotor 2 is rotatably arranged on the bracket 6 through the rotating connecting member 7.

[0046] In this embodiment, the bracket 6 is fixedly mounted on the housing 1. As a supporting structure of the rotor 2, the bracket 6 is usually made of high-strength material and has sufficient rigidity and load-bearing capacity to ensure the stability and reliability of the rotor 2 when rotating at high speed or bearing a large load. The connection between the bracket 6 and the housing 1 can be welding, bolting, etc., to ensure a firm connection between the bracket 6 and the housing 1. The rotating connector 7 is arranged on the bracket 6, and its function is to connect the rotor 2 with the bracket 6 so that the rotor 2 can rotate relative to the bracket 6. The rotating connector 7 can be a rotating transmission element such as a bearing, a sleeve, a coupling, etc., which has good rotation accuracy and low friction characteristics, ensuring that the rotor 2 is smooth and unobstructed during the rotation process and reducing energy loss. The rotating connector 7 and the bracket 6 and the rotor 2 are usually reliably mechanically connected by key connection, interference fit, fastener fixation, etc.

[0047] Optionally, there are two brackets 6 , and the two brackets 6 are symmetrically arranged on the housing 1 .

[0048] In this embodiment, two brackets 6 are provided and symmetrically distributed on both sides of the housing 1. This double bracket 6 structure can effectively disperse the centrifugal force and axial force generated when the rotor 2 rotates, reduce the burden of a single bracket 6, and improve the stability of the overall structure. At the same time, the symmetrically arranged brackets 6 also help to maintain the axial positioning accuracy of the rotor 2 and avoid eccentricity or vibration of the rotor 2 caused by uneven force on one side.

[0049] In this embodiment, the bearing of the rotor 2 is moved outside the housing, which reduces the influence of dust and coke powder and improves the life and stability of the overall equipment.

[0050] Optionally, the rotor 2 includes: a rotating shaft 201 rotatably disposed on the bracket 6; a plurality of partition plates 202 , which are circumferentially spaced and disposed on the rotating shaft 201 , and a material storage area 203 is formed between two adjacent partition plates 202 .

[0051] In this embodiment, the rotating shaft 201 is the main part of the rotor 2, which is rotatably arranged on the bracket 6, and realizes frictionless rotation with the bracket 6 through the rotating connector 7. The rotating shaft 201 is usually made of high-strength material, and has sufficient rigidity and wear resistance to withstand mechanical stress and medium pressure during operation. The parameters such as the axial length, outer diameter, and surface roughness of the rotating shaft 201 need to be accurately designed according to the working conditions and sealing requirements. There are several partition plates 202, which are arranged on the rotating shaft 201 at intervals along the circumference of the rotating shaft 201. The partition plates 202 and the rotating shaft 201 can be firmly connected by welding, key connection, fastener fixing, etc. The function of the partition plate 202 is to divide the outer surface of the rotating shaft 201 into several independent storage areas 203, each storage area 203 can store a certain amount of dust and coke powder, and the connection and closing of each storage area 203 with the external interface can be accurately controlled by controlling the rotation angle of the rotor 2 as needed to realize the transportation of dust and coke powder.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A sealing structure of a rotary sealing valve, comprising a housing (1) and a rotor (2) rotatably arranged on the housing (1), wherein the rotor (2) penetrates the housing (1), and is characterized in that: Also includes: A first sealing ring (3) is arranged on the housing (1); The second sealing ring (4) is arranged on the rotor (2); the first sealing ring (3), the second sealing ring (4) and the housing (1) form a sealing cavity (5); the rotor (2) passes through the sealing cavity (5); the first sealing ring (3) and the second sealing ring (4) are connected to the rotor (2) in a rotating sealing manner.

2. The sealing structure of a rotary sealing valve according to claim 1, characterized in that: There are two of each of the first sealing ring (3) and the second sealing ring (4), the two first sealing rings (3) are symmetrically arranged on both sides of the housing (1), and the two second sealing rings (4) are symmetrically arranged on both sides of the rotor (2).

3. The sealing structure of a rotary sealing valve according to claim 2, characterized in that: The second sealing ring (4) comprises: There are a plurality of sealing blocks (401), wherein the plurality of sealing blocks (401) are arranged in a circumferential array on the rotor (2), and the plurality of sealing blocks (401) are connected to each other at the first position, and a rotation seal is formed between the sealing blocks (401) and the rotor (2).

4. The sealing structure of a rotary sealing valve according to claim 3, characterized in that: The second sealing ring (4) also includes: A convex block (402) is arranged on the sealing block (401), the convex block (402) is located in the housing (1), and the convex block (402) has a plurality of discharge grooves (403) on a side away from the rotor (2), the plurality of discharge grooves (403) are distributed in a circle with the axis of the rotor (2) as the center, and the discharge grooves (403) are connected to the interior of the housing (1).

5. The sealing structure of a rotary sealing valve according to claim 1, characterized in that: Also includes: A bracket (6) is arranged on the housing (1); The rotating connection member (7) is arranged on the bracket (6), and the rotor (2) is rotatably arranged on the bracket (6) via the rotating connection member (7).

6. The sealing structure of a rotary sealing valve according to claim 5, characterized in that: There are two brackets (6), and the two brackets (6) are symmetrically arranged on the housing (1).

7. The sealing structure of a rotary sealing valve according to claim 6, characterized in that: The rotor (2) comprises: A rotating shaft (201) rotatably disposed on the bracket (6); There are a plurality of partition plates (202), and the plurality of partition plates (202) are arranged on the rotating shaft (201) at circumferential intervals, and a material storage area (203) is formed between two adjacent partition plates (202).

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