Novel sealing device

Abstract

The utility model discloses a novel sealing device which comprises a sealing body, a mechanical seal gland, a mechanical seal assembly and a flushing pipe assembly. The sealing body is used for connecting a water pump rotating shaft end. A sealing cavity is formed between the sealing body and the rotating shaft. The mechanical seal gland is connected to the side, away from the water pump rotating shaft end, of the sealing body, and a mechanical seal connecting part is arranged on the side, close to the water pump rotating shaft end, of the mechanical seal gland and located in the sealing cavity. One end of the mechanical seal assembly is connected with the mechanical seal connecting part, and the other end of the mechanical seal assembly is connected to the rotating shaft; the flushing pipe assembly is arranged on the sealing body and communicated with the sealing cavity. According to the novel sealing device, the end, matched with the mechanical seal assembly, of the mechanical seal gland can be placed in the sealing cavity of the sealing body, so that the same pump can share one set of flushing pipeline assembly; when the mechanical seal assembly is replaced, the flushing pipe does not need to be disassembled and then installed; a flushing pipe is not required to be mounted on the mechanical seal gland, so that the machine seal gland is more compact, process steps are reduced, and processing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water pump sealing structures, in particular to a novel sealing device. Background Art

[0002] The sealing structure of the water pump is usually a packing seal or a mechanical seal. The existing sealing structure has the following shortcomings:

[0003] Mechanical seals and packing seals have different sealing structures, so the installation positions of flushing pipeline components are also different. The flushing pipe of the packing seal is installed on the seal body, and the flushing pipe of the mechanical seal is installed on the mechanical seal gland. Therefore, the same pump cannot share a set of flushing pipeline components.

[0004] When replacing the mechanical seal, the flushing pipeline on the mechanical seal gland needs to be removed; after replacing the mechanical seal, the flushing pipeline can be installed again;

[0005] The weight and volume of the mechanical seal gland of the same gear are larger than those of the packing gland. Because it needs to be equipped with a flushing pipe, the structural and process requirements are higher. Utility Model Content

[0006] In order to solve the above technical problems, the present invention provides a new sealing device, the specific technical solution is as follows:

[0007] A new sealing device for water pump sealing, comprising:

[0008] A sealing body, used for connecting to the rotating shaft end of the water pump, with a sealing cavity formed between the sealing body and the rotating shaft;

[0009] A mechanical seal gland is connected to the side of the sealing body away from the water pump shaft end, and a mechanical seal connecting portion is provided on the side of the mechanical seal gland adjacent to the water pump shaft end, and the mechanical seal connecting portion is located in the sealing cavity;

[0010] a mechanical seal assembly, one end of which is connected to the mechanical seal connection portion and the other end of which is connected to the rotating shaft, wherein the mechanical seal assembly is located in the sealing cavity;

[0011] A flushing pipe assembly is provided on the sealing body and communicated with the sealing cavity.

[0012] Preferably,

[0013] A sealing sleeve hole is formed on one side of the sealing body, and the sealing sleeve hole is connected to the sealing cavity;

[0014] A sealing sleeve is provided on one side of the mechanical seal gland, and the rotating shaft, the sealing sleeve and the sealing sleeve hole are sequentially sleeved and matched, and the sealing sleeve forms the mechanical seal connection part.

[0015] Preferably,

[0016] The sealing sleeve is interference-fitted with the sealing sleeve hole;

[0017] Or a sealing ring is provided between the sealing sleeve and the sealing sleeve hole.

[0018] Preferably, the flushing pipe assembly includes a flushing pipeline, one end of which is connected to the sealing cavity, and the other end of which is connected to the end of the sealing body to form a flushing port.

[0019] Preferably, the flushing pipeline comprises:

[0020] a first liquid inlet pipe, one end of which is connected to the flushing port and the other end of which extends axially along the sealing body toward the end of the water pump shaft;

[0021] The second liquid inlet pipe has one end connected to the sealed cavity and the other end connected to the first liquid inlet pipe.

[0022] Preferably, it also includes a process hole, which passes through the outer side of the sealing body into the sealing cavity and is connected to the first liquid inlet pipe. The process hole connects the first liquid inlet pipe to the sealing cavity to form the second liquid inlet hole, and a wire plug is provided on the process hole near the outer side of the sealing body.

[0023] Preferably, the mechanical seal gland is bolted to the sealing body.

[0024] Preferably, an auxiliary sealing ring is provided between the mechanical seal connecting portion and the mechanical seal assembly.

[0025] Preferably, the sealing body comprises an annular portion and a raised portion that are integrally connected, the sealing cavity is provided in the annular portion, and the flushing tube assembly is provided in the raised portion.

[0026] The new sealing device provided by the utility model has the following beneficial effects:

[0027] 1. The end of the mechanical seal gland that fits with the mechanical seal assembly can be placed in the sealing cavity of the seal body, so that the mechanical seal assembly in the mechanical seal and the packing in the packing seal overlap in space within the seal body. Therefore, the same pump can share a set of flushing pipeline components, that is, the flushing pipeline components are installed on the seal body;

[0028] 2. When replacing the mechanical seal assembly, since the flushing pipe is not installed on the mechanical seal gland but on the seal body, there is no need to disassemble the flushing pipe before installing it;

[0029] 3. No flushing pipe is required on the mechanical seal gland. The structure will be more compact without flushing holes, which will provide more installation space and reduce weight. At the same time, it will reduce process steps and reduce processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic diagram of the three-dimensional structure of a new sealing device provided in an embodiment of the present utility model;

[0032] Figure 2 A partial cross-sectional view of a new sealing device provided in an embodiment of the present utility model;

[0033] Figure 3 It is a partial cross-sectional view of the packing seal structure in the background technology of the present utility model;

[0034] Figure 4 It is a partial cross-sectional view of the mechanical seal structure in the background technology of the present utility model.

[0035] Reference numerals

[0036] 10-rotating shaft;

[0037] 1- sealing body; 11- sealing cavity; 12- sealing sleeve hole; 13- annular portion; 14- raised portion;

[0038] 2-mechanical seal gland; 21-mechanical seal connection; 22-auxiliary sealing ring;

[0039] 3- Mechanical seal assembly;

[0040] 4- flushing pipe assembly; 41- flushing pipeline; 411- flushing port; 412- first liquid inlet pipe; 413- second liquid inlet pipe; 414- plug. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in the subsequent drawings.

[0043] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate and simplify the description of the utility model and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first" and "second," etc., are used solely for distinction and should not be construed as indicating or implying relative importance.

[0044] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0045] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0046] See Figure 1 and Figure 2 This embodiment provides a new type of sealing device for water pump sealing, including a sealing body 1, a mechanical seal cover 2, a mechanical seal assembly 3 and a flushing pipe assembly 4.

[0047] The sealing body 1 is used to connect to the rotating shaft end of the water pump, and a sealing cavity 11 is formed between the sealing body 1 and the rotating shaft 10.

[0048] The mechanical seal gland 2 is connected to the side of the sealing body 1 away from the water pump shaft end. The side of the mechanical seal gland 2 close to the water pump shaft end is provided with a mechanical seal connecting portion 21 , which is located in the sealing cavity 11 .

[0049] One end of the mechanical seal assembly 3 is connected to the mechanical seal connecting portion 21 , and the other end is connected to the rotating shaft 10 . The mechanical seal assembly 3 is located in the sealing cavity 11 .

[0050] See Figure 3 In the packing seal structure, that is, the combination of packing gland + packing + sealing body 1 + rotating shaft 10 + wire plug + flushing pipe assembly 4, the flushing hole of the flushing pipe assembly 4 is on the sealing body 1.

[0051] The flushing pipe assembly 4 is provided on the sealing body 1 and communicates with the sealing cavity 11 .

[0052] See Figure 4 In the mechanical seal structure, that is, the combination of mechanical seal cover 2 + mechanical seal assembly 3 + sealing body 1 + rotating shaft 10 + wire plug + flushing pipe assembly 4, since the mechanical seal structure 3 is located between the mechanical seal cover 2 and the sealing body 1, the flushing assembly 4 needs to be installed on the mechanical seal cover 2 to facilitate flushing of the mechanical seal assembly 3. This structure requires the flushing hole of the flushing pipe assembly 4 to be on the mechanical seal cover 2.

[0053] Obviously, the installation positions of the flushing pipe assemblies 4 of the two are different, and since the mechanical seal gland 2 has an additional flushing hole, it will be larger than the packing gland.

[0054] In the novel sealing device provided in this embodiment, after the mechanical seal gland 2 is installed on the sealing body 1, the mechanical seal connection portion 21 on the mechanical seal gland 2 can be located within the sealing cavity 11 of the sealing body 1, and the mechanical seal assembly 3 can be placed together within the sealing cavity 11 through the mechanical seal connection portion 21. Since the mechanical seal assembly 3 is located within the sealing cavity 11, the flushing pipe assembly 4 can be directly set on the sealing body 1, thereby directly flushing the mechanical seal assembly 3. Compared with the traditional mechanical seal structure, the mechanical seal gland 2 and the mechanical seal assembly 3 are designed to fit together at one end more compactly, so that they can be placed within the sealing cavity 11 of the sealing body 1. A set of flushing pipe assembly 4 can be shared with the packing seal structure, and one set of flushing pipe assembly 4 can be assembled less during disassembly and installation. In addition, the manufacturing process of the mechanical seal gland 2 lacks flushing holes, which can reduce the thickness of the mechanical seal gland 2 and provide more external installation space.

[0055] Specifically, the mechanical seal assembly 3 can be a conventional dynamic and static ring seal structure. The dynamic ring is connected to the rotating shaft 10, and the static ring is connected to the mechanical seal connection portion 21. The dynamic ring is fixed to the sealing body 1 via the mechanical seal gland 2. The mechanical seal gland 2, the sealing body 1, and the rotating shaft 10 form a sealed cavity 11 to achieve a sealing effect. Since the mechanical seal assembly 3 is located in the sealed cavity 11, the flushing assembly 4 can be installed on the sealing body 1 to flush the mechanical seal assembly 3.

[0056] The novel sealing device provided in this embodiment has the following beneficial effects:

[0057] 1. One end of the mechanical seal gland 2 that cooperates with the mechanical seal assembly 3 can be placed in the sealing cavity 11 of the sealing body 1, so that the mechanical seal assembly 3 in the mechanical seal and the packing in the packing seal overlap in spatial position within the sealing body 1. Therefore, the same pump can share a set of flushing pipeline assembly 4, that is, the flushing pipeline assembly 4 is installed on the sealing body 1.

[0058] 2. When replacing the mechanical seal assembly 3, since the flushing pipe is not installed on the mechanical seal gland 2 but on the sealing body 1, there is no need to disassemble the flushing pipe and then install it.

[0059] 3. No flushing pipe is required on the mechanical seal gland 2. The structure will be more compact without flushing holes, which will provide more installation space and reduce weight. At the same time, it will reduce process steps and reduce processing costs.

[0060] Further, see Figure 2 :

[0061] A sealing sleeve hole 12 is formed on one side of the sealing body 1 , and the sealing sleeve hole 12 is connected to the sealing cavity 11 .

[0062] A sealing sleeve is provided on one side of the mechanical seal gland 2 , and the rotating shaft 10 , the sealing sleeve and the sealing sleeve hole 12 are sequentially sleeved and matched from the inside to the outside, and the sealing sleeve forms the mechanical seal connection portion 21 .

[0063] Among them, the sealing sleeve hole 12 can be a mounting hole that extends axially from the sealing cavity 11 to one side of the sealing body 1, and the sealing sleeve can be a cylindrical structure arranged on one side of the mechanical seal cover 2. When the sealing sleeve is installed in the sealing sleeve hole 12, the sealing sleeve is fixed relative to the sealing sleeve hole 12 and seals the sealing cavity 11. At the same time, the sealing sleeve is sleeved outside the rotating shaft 10, and the rotating shaft 10 can rotate relative to the sealing sleeve. Since the mechanical seal assembly 3 is arranged between the sealing sleeve and the rotating shaft 10, the cavity enclosed by the sealing body 1, the mechanical seal cover 2 and the rotating shaft 10 is a sealed cavity.

[0064] Furthermore, the sealing sleeve is interference-fitted with the sealing sleeve hole 12 so that a seal can be formed between the mechanical seal cover 2 and the sealing body 1; or a sealing ring is provided between the sealing sleeve and the sealing sleeve hole 12 to seal between the mechanical seal cover 2 and the sealing body 1.

[0065] Further, see Figure 2 The flushing pipe assembly 4 includes a flushing pipeline 41 , one end of the flushing pipeline 41 is connected to the sealing cavity 11 , and the other end is connected to the end of the sealing body 1 to form a flushing port 411 .

[0066] Among them, the flushing pipeline 41 is located in the sealing body 1. When the flushing pipe is inserted into the flushing 411, the sealing structure can be flushed.

[0067] For further information, please see Figure 2 The flushing pipeline 41 includes a first liquid inlet pipe 412 and a second liquid inlet pipe 413 .

[0068] One end of the first liquid inlet pipe 412 is connected to the flushing port 411 , and the other end extends along the axial direction of the sealing body 1 toward the end of the water pump shaft.

[0069] One end of the second liquid inlet pipe 413 is connected to the sealed cavity 11 , and the other end is connected to the first liquid inlet pipe 412 .

[0070] Specifically, the first liquid inlet pipe 412 can be horizontal and can be inserted into the flushing pipe. The flushing liquid can flow into the sealed cavity 11 through the first liquid inlet pipe 412 and the second liquid inlet pipe 413. The first liquid inlet pipe 412 and the second liquid inlet pipe 413 can form an "L"-shaped pipeline.

[0071] For further information, please see Figure 2 , and also includes a process hole, which runs through the outer side of the sealing body 1 into the sealing cavity 11 and is connected to the first liquid inlet pipe 412. The part of the process hole that connects the first liquid inlet pipe 412 to the sealing cavity 11 forms a second liquid inlet hole 413, and a wire plug 414 is provided on the process hole near the outer side of the sealing body 1.

[0072] The process hole is used to drill the second liquid inlet pipe 413 during processing. After drilling, the process hole near the outer part of the sealing body 1 can be blocked with a wire plug 414. The process hole and the first liquid inlet pipe 412 can form a "T"-shaped pipeline.

[0073] Furthermore, the mechanical seal gland 2 can be connected to the sealing body 1 by bolts to facilitate installation and disassembly.

[0074] For further information, please see Figure 2 An auxiliary sealing ring 22 can be provided between the mechanical seal connection portion 21 and the mechanical seal assembly 3 to enhance the sealing effect.

[0075] Further, see Figure 1 The sealing body 1 includes an annular portion 13 and a raised portion 14 that are integrally connected. A sealing cavity 11 is provided in the annular portion 13 , and a flushing pipe assembly 4 is provided in the raised portion 14 .

[0076] Working principle:

[0077] The mechanical seal assembly 3 can be a conventional dynamic and static ring seal structure. The dynamic ring is connected to the rotating shaft 10, and the static ring is connected to the mechanical seal connection portion 21. The mechanical seal gland 2 is fixed to the sealing body 1. The mechanical seal gland 2, the sealing body 1, and the rotating shaft 10 form a sealed cavity 11 to achieve a sealing effect. Since the mechanical seal assembly 3 is located in the sealed cavity 11, the flushing assembly 4 can be installed on the sealing body 1 to flush the mechanical seal assembly 3.

[0078] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0079] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of the present utility model.

Claims

1. A new type of sealing device for water pump sealing, characterized in that: include: A sealing body (1) is used for connecting to the rotating shaft end of the water pump, and a sealing cavity (11) is formed between the sealing body (1) and the rotating shaft (10); A mechanical seal gland (2) is connected to the side of the sealing body (1) away from the water pump shaft end, and a mechanical seal connecting portion (21) is provided on the side of the mechanical seal gland (2) adjacent to the water pump shaft end, and the mechanical seal connecting portion (21) is located in the sealing cavity (11); a mechanical seal assembly (3), one end of which is connected to the mechanical seal connection portion (21) and the other end of which is connected to the rotating shaft (10); the mechanical seal assembly (3) is located in the sealing cavity (11); A flushing pipe assembly (4) is provided on the sealing body (1) and is connected to the sealing cavity (11).

2. The novel sealing device according to claim 1 is characterized in that: A sealing sleeve hole (12) is formed on one side of the sealing body (1), and the sealing sleeve hole (12) is connected to the sealing cavity (11); A sealing sleeve is provided on one side of the mechanical seal gland (2); the rotating shaft (10), the sealing sleeve and the sealing sleeve hole (12) are sleeved and matched in sequence; the sealing sleeve forms the mechanical seal connection portion (21).

3. The novel sealing device according to claim 2 is characterized in that: The sealing sleeve is interference-fitted with the sealing sleeve hole (12); Or a sealing ring is provided between the sealing sleeve and the sealing sleeve hole (12).

4. The new sealing device according to claim 1 is characterized in that: The flushing pipe assembly (4) comprises a flushing pipeline (41), one end of which is connected to the sealing cavity (11), and the other end of which is connected to the end of the sealing body (1) to form a flushing port (411).

5. The novel sealing device according to claim 4 is characterized in that: The flushing pipeline (41) comprises: A first liquid inlet pipe (412), one end of which is connected to the flushing port (411), and the other end of which extends axially along the sealing body (1) toward the end of the water pump shaft; The second liquid inlet pipe (413) has one end connected to the sealed cavity (11) and the other end connected to the first liquid inlet pipe (412).

6. The novel sealing device according to claim 5, characterized in that: The invention also includes a process hole, which passes through the sealing cavity (11) along the outer side of the sealing body (1) and is connected to the first liquid inlet pipe (412). The part of the process hole that connects the first liquid inlet pipe (412) to the sealing cavity (11) forms the second liquid inlet hole (413). A wire plug (414) is provided on the process hole near the outer side of the sealing body (1).

7. The novel sealing device according to any one of claims 1 to 6, characterized in that: The mechanical seal gland (2) is bolted to the sealing body (1).

8. The novel sealing device according to any one of claims 1 to 6, characterized in that: An auxiliary sealing ring (22) is provided between the mechanical seal connecting portion (21) and the mechanical seal assembly (3).

9. The novel sealing device according to any one of claims 1 to 6, characterized in that: The sealing body (1) comprises an annular portion (13) and a raised portion (14) connected in one piece, the sealing cavity (11) being provided in the annular portion (13), and the flushing pipe assembly (4) being provided in the raised portion (14).

Images