Double-end-face mechanical seal mechanism with circulating cooling function

Abstract

The utility model relates to the technical field of pumps, and discloses a double-end-face mechanical seal mechanism with a circulating cooling function, a pump shaft is sealed through a sealing part, a first dynamic sealing assembly and a second dynamic sealing assembly, liquid is prevented from permeating into the pump shaft, meanwhile, an inner cavity is formed in the sealing part, the pump shaft is coaxially provided with a circulating oblique straight wheel, and the circulating oblique straight wheel is arranged in the inner cavity. The circulating inclined straight wheel rotates along with the pump shaft, the circulating inclined straight wheel can generate pressure difference, cooling liquid is conveyed to flow through the pressure difference, the cooling liquid is used for cooling, dry burning generated by friction of the first dynamic sealing assembly and the second dynamic sealing assembly is cooled, and the service life of the pump can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of pump technology, and in particular to a double-end mechanical seal mechanism with circulating cooling. Background Technology

[0002] Industrial pumps, chemical pumps, and other pumps mainly consist of a motor, pump body, pump shaft, and impeller. The pump shaft is the transmission device that connects the drive unit (such as the motor) and the impeller. To prevent liquid penetration, especially chemical agents, the pump shaft needs to be sealed. Once sealed, friction will occur on the pump shaft during rotation, generating heat, which will also affect the service life of the entire pump. Utility Model Content

[0003] Based on the above, the purpose of this utility model is to provide a double-end mechanical seal mechanism with circulating cooling, which has good sealing performance and cooling effect, and can extend the service life of the pump.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model provides a double-end mechanical seal mechanism with circulating cooling, including a pump shaft, an impeller at the end of the pump shaft, a sealing part sleeved on the pump shaft, the sealing part having an inner cavity running vertically through the upper and lower parts, and the pump shaft passing through the inner cavity;

[0006] A first dynamic sealing assembly is provided at the top of the sealing part, between the sealing part, the pump shaft, and the impeller;

[0007] A second dynamic sealing assembly is provided at the bottom of the sealing part and between the sealing part and the pump shaft;

[0008] The pump shaft is also fitted with a circulating inclined wheel, which is located inside the inner cavity, and the inner cavity is also filled with coolant.

[0009] Furthermore, the inner cavity includes a first cavity, a second cavity, and a third cavity, with the top of the second cavity communicating with the first cavity and the bottom of the second cavity communicating with the third cavity;

[0010] The first dynamic sealing assembly is installed inside the first cavity;

[0011] The second dynamic sealing assembly is installed inside the third cavity;

[0012] The circulating inclined wheel is located inside the second cavity.

[0013] Furthermore, the first dynamic sealing assembly includes a first dynamic ring, a first static ring, a first support ring, and a first spring;

[0014] The first dynamic ring is fixedly sleeved on the pump shaft, the pump shaft passes through the first static ring and the first support ring, the first dynamic ring slides and rotates to seal above the first static ring, the first static ring is disposed on the first support ring, the top of the first support ring is provided with a first folded edge, the first spring is sleeved on the first support ring, the bottom of the first spring abuts against the bottom of the first cavity, and the top of the first spring abuts against the first folded edge.

[0015] Furthermore, the second dynamic sealing assembly includes a second dynamic ring, a second static ring, a second support ring, and a second spring;

[0016] The second dynamic ring is fixedly sleeved on the pump shaft. The bottom of the second dynamic ring is connected to the second support ring. The second static ring is disposed in the third cavity. The top of the second dynamic ring is rotatably sealed below the second static ring. The pump shaft passes through the second static ring and the second support ring. The second support ring includes a second folded edge. The top of the second spring abuts against the second folded edge, and the bottom of the second spring abuts against the pump shaft.

[0017] Furthermore, the sealing part includes a first sealing body and a second sealing body, which are detachably connected.

[0018] Furthermore, a first sealing ring is provided between the first sealing body and the second sealing body.

[0019] Furthermore, a first fixed ring is provided between the first dynamic ring and the pump shaft, and a second sealing ring is provided between the first fixed ring and the first dynamic ring.

[0020] Furthermore, a second fixed ring is provided between the second dynamic ring and the second support ring.

[0021] Furthermore, the impeller is located above the first dynamic ring, and a third sealing ring is provided between the impeller and the first dynamic ring.

[0022] Furthermore, a fourth sealing ring is provided between the sealing part and the second static ring.

[0023] The beneficial effects of this utility model are as follows:

[0024] This utility model provides a double-end mechanical seal mechanism with circulating cooling. The pump shaft is sealed by a sealing part, a first dynamic sealing component, and a second dynamic sealing component to prevent liquid from penetrating into the pump shaft. At the same time, an inner cavity is provided in the sealing part, and a circulating slant wheel is coaxially arranged on the pump shaft. The circulating slant wheel rotates with the pump shaft and can generate a pressure difference. The pressure difference causes the coolant to be transported and flowed, and the coolant cools the first dynamic sealing component and the second dynamic sealing component to cool the dry burning caused by friction, which can extend the service life of the pump. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0026] Figure 1 This invention provides a schematic diagram of a double-end mechanical seal mechanism with circulating cooling, as shown in the embodiment of the present invention.

[0027] Figure 2 This is a cross-sectional structural diagram of a double-end mechanical seal mechanism with circulating cooling provided in an embodiment of the present invention.

[0028] In the picture:

[0029] 1. Pump shaft; 2. Impeller; 3. Sealing part; 31. Inner cavity; 311. First cavity; 312. Second cavity; 313. Third cavity; 32. First sealing body; 33. Second sealing body; 4. First dynamic sealing assembly; 41. First dynamic ring; 42. First static ring; 43. First support ring; 431. First folded edge; 44. First spring; 45. Fifth sealing ring; 5. Second dynamic sealing assembly; 51. Second dynamic ring; 52. Second static ring; 53. Second support ring; 531. Second folded edge; 54. Second spring; 6. Circulating inclined wheel; 71. First sealing ring; 72. First fixed ring; 73. Second sealing ring; 74. Second fixed ring; 75. Third sealing ring; 76. Fourth sealing ring; 81. Coolant inlet; 82. Coolant outlet. Detailed Implementation

[0030] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] like Figure 1 and 2As shown, this utility model embodiment provides a double-end mechanical seal mechanism with circulating cooling, including a pump shaft 1, an impeller 2 at the end of the pump shaft 1, a sealing part 3 sleeved on the pump shaft 1, the sealing part 3 having an inner cavity 31 extending vertically, through which the pump shaft 1 passes; a first dynamic sealing assembly 4 is provided at the top of the sealing part 3, between the sealing part 3, the pump shaft 1, and the impeller 2; a second dynamic sealing assembly 5 is provided at the bottom of the sealing part 3, between the sealing part 3 and the pump shaft 1; a circulating inclined straight wheel 6 is also sleeved on the pump shaft 1, the outer periphery of the circulating inclined straight wheel has a planar structure with several inclined grooves; the circulating inclined straight wheel 6 is located in the inner cavity 31, and coolant is also provided in the inner cavity 31.

[0035] This utility model provides a double-end mechanical seal mechanism with circulating cooling. The pump shaft 1 is sealed by the sealing part 3, the first dynamic sealing component 4, and the second dynamic sealing component 5 to prevent liquid from penetrating into the pump shaft 1. At the same time, the sealing part 3 is provided with an inner cavity 31. A circulating inclined wheel 6 is coaxially arranged on the pump shaft 1. The circulating inclined wheel 6 rotates with the pump shaft 1 and can generate a pressure difference. The pressure difference causes the coolant to be transported and flowed, and the coolant is circulated for cooling. The sealing part 3 is provided with a coolant inlet 81 and a coolant outlet 82, which are connected to the inner cavity 31. The mechanism also cools the first dynamic sealing component 4 and the second dynamic sealing component 5 to prevent dry burning caused by friction, thus extending the service life of the pump.

[0036] In some embodiments, such as Figure 2 As shown, to facilitate the installation of the first dynamic sealing assembly 4, the second dynamic sealing assembly 5, and the circulating inclined wheel 6, the inner cavity 31 includes a first cavity 311, a second cavity 312, and a third cavity 313. The top of the second cavity 312 communicates with the first cavity 311, and the bottom of the second cavity 312 communicates with the third cavity 313. The first dynamic sealing assembly 4 is installed in the first cavity 311; the second dynamic sealing assembly 5 is installed in the third cavity 313; the circulating inclined wheel 6 is located in the second cavity 312, and the pump shaft 1 passes through the first cavity 311, the second cavity 312, and the third cavity 313.

[0037] In some embodiments, such as Figure 2As shown, the first dynamic sealing assembly 4 includes a first dynamic ring 41, a first static ring 42, a first support ring 43, and a first spring 44. The first dynamic ring 41 is fixedly sleeved on the pump shaft 1, and the pump shaft 1 passes through the first static ring 42 and the first support ring 43. The first dynamic ring 41 slides and rotates to seal above the first static ring 42. The first static ring 42 is disposed on the first support ring 43. The top of the first support ring 43 is provided with a first folded edge 431. The first spring 44 is sleeved on the first support ring 43. The bottom of the first spring 44 abuts against the bottom of the first cavity 311, and the top of the first spring 44 abuts against the first folded edge 431. Specifically, in this embodiment, the first static ring 42 and the first support ring 43 are installed in the first cavity 311 and are stationary, while the first dynamic ring 41 rotates with the pump shaft 1. The first dynamic ring 41 and the first static ring 42 are rotatably sealed together, which may cause dry burning. Cooling is achieved by transporting coolant through the circulating inclined wheel 6. Simultaneously, the first static ring 42 is mounted on the first support ring 43, and a first spring 44 is fitted onto the first support ring 43. The elastic force of the first spring 44 can adjust the height of the first static ring 42 while keeping it planar; concentricity is not required, only planarity. To prevent liquid from seeping through the gap between the sealing part 3 and the first support ring 43, a fifth sealing ring 45 is provided between the sealing part 3 and the first support ring 43.

[0038] In some embodiments, such as Figure 2As shown, the second dynamic sealing assembly 5 includes a second dynamic ring 51, a second static ring 52, a second support ring 53, and a second spring 54. The second dynamic ring 51 is fixedly sleeved on the pump shaft 1, and the bottom of the second dynamic ring 51 is connected to the second support ring 53. The second static ring 52 is disposed in the third cavity 313, and the top of the second dynamic ring 51 is rotatably sealed below the second static ring 52. The pump shaft 1 passes through the second static ring 52 and the second support ring 53. The second support ring 53 includes a second folded edge 531. The top of the second spring 54 abuts against the second folded edge 531, and the bottom of the second spring 54 abuts against the pump shaft 1. Specifically, in this embodiment, the second static ring 52 is installed in the third cavity 313 and is in a stationary state. The second dynamic ring 51 and the second support ring 53 rotate with the pump shaft 1. The second dynamic ring 51 and the second static ring 52 are rotatably sealed together, which may cause dry burning. Cooling is achieved by circulating coolant through the circulating inclined wheel 6. At the same time, the second dynamic ring 51 is set on the second support ring 53, and the second support ring 53 is fitted with a second spring 54. The elastic force of the second spring 54 can be used to adjust the height of the second dynamic ring 51 and keep the second dynamic ring 51 flat. Concentricity is not required; it is only necessary to keep it flat. It should be noted that the second spring 54 rotates with the pump shaft 1.

[0039] In some embodiments, such as Figure 2 As shown, to facilitate the installation of the circulating inclined wheel 6, the sealing part 3 includes a first sealing body 32 and a second sealing body 33, which are detachably connected. Furthermore, a first sealing ring 71 is provided between the first sealing body 32 and the second sealing body 33 to prevent liquid from seeping into the sealing part 3 from the first sealing body 32 and the second sealing body 33.

[0040] In some embodiments, such as Figure 2 As shown, in order to fix the first dynamic ring 41 and prevent liquid from seeping from the gap between the first dynamic ring 41 and the pump shaft 1, a first fixing ring 72 is provided between the first dynamic ring 41 and the pump shaft 1, and a second sealing ring 73 is provided between the first fixing ring 72 and the first dynamic ring 41.

[0041] In some embodiments, such as Figure 2 As shown, in order to fix the second support ring 53 and prevent liquid from seeping through the gap between the second support ring 53 and the second dynamic ring 51, a second fixing ring 74 is provided between the second dynamic ring 51 and the second support ring 53.

[0042] In some embodiments, such as Figure 2As shown, the impeller 2 is located above the first dynamic ring 41. In order to prevent liquid from seeping through the gap between the impeller 2 and the first dynamic ring 41, a third sealing ring 75 is provided between the impeller 2 and the first dynamic ring 41.

[0043] In some embodiments, such as Figure 2 As shown, in order to prevent liquid from seeping through the gap between the sealing part 3 and the second static ring 52, a fourth sealing ring 76 is provided between the sealing part 3 and the second static ring 52.

[0044] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A double mechanical seal with circulation cooling, comprising a pump shaft (1), the end of which is provided with an impeller (2), characterized in that, The pump shaft (1) is sleeved with a sealing part (3), the sealing part (3) is provided with an inner cavity (31) extending up and down, and the pump shaft (1) passes through the inner cavity (31); A first dynamic sealing assembly (4) is arranged between the sealing part (3), the pump shaft (1) and the impeller (2) at the top of the sealing part (3); A second dynamic sealing assembly (5) is arranged between the sealing part (3) and the pump shaft (1) at the bottom of the sealing part (3); The pump shaft (1) is also sleeved with a circulating bevel wheel (6), the circulating bevel wheel (6) is located in the inner cavity (31), and the inner cavity (31) is also provided with cooling liquid.

2. A double mechanical seal with circulation cooling according to claim 1, characterized in that, The inner cavity (31) comprises a first cavity (311), a second cavity (312) and a third cavity (313), the top of the second cavity (312) is communicated with the first cavity (311), and the bottom of the second cavity (312) is communicated with the third cavity (313); The first dynamic sealing assembly (4) is installed in the first cavity (311); The second dynamic sealing assembly (5) is installed in the third cavity (313); The circulating bevel wheel (6) is located in the second cavity (312).

3. A double mechanical seal with circulation cooling according to claim 2, characterized in that, The first dynamic sealing assembly (4) comprises a first dynamic ring (41), a first static ring (42), a first supporting ring (43) and a first spring (44); The first dynamic ring (41) is fixedly sleeved on the pump shaft (1), the pump shaft (1) passes through the first static ring (42) and the first supporting ring (43), the first dynamic ring (41) is slidingly and rotatably sealed above the first static ring (42), the first static ring (42) is arranged on the first supporting ring (43), the top of the first supporting ring (43) is provided with a first folding edge (431), the first spring (44) is sleeved on the first supporting ring (43), the bottom of the first spring (44) abuts against the bottom of the first cavity (311), and the top of the first spring (44) abuts against the first folding edge (431).

4. A double mechanical seal with circulation cooling according to claim 2, characterized in that, The second dynamic sealing assembly (5) comprises a second dynamic ring (51), a second static ring (52), a second supporting ring (53) and a second spring (54); The second dynamic ring (51) is fixedly sleeved on the pump shaft (1), the bottom of the second dynamic ring (51) is connected with the second supporting ring (53), the second static ring (52) is arranged in the third cavity (313), the top of the second dynamic ring (51) is rotatably sealed below the second static ring (52), the pump shaft (1) passes through the second static ring (52) and the second supporting ring (53), the second supporting ring (53) comprises a second folding edge (531), the top of the second spring (54) abuts against the second folding edge (531), and the bottom of the second spring (54) abuts against the pump shaft (1).

5. A double mechanical seal with circulating cooling according to claim 2, characterized in that, The sealing part (3) comprises a first sealing body (32) and a second sealing body (33), and the first sealing body (32) and the second sealing body (33) are detachably connected.

6. A double mechanical seal with circulating cooling according to claim 5, characterized in that A first sealing ring (71) is arranged between the first sealing body (32) and the second sealing body (33).

7. A double mechanical seal with circulating cooling according to claim 3, characterized in that A first fixing ring (72) is arranged between the first dynamic ring (41) and the pump shaft (1), and a second sealing ring (73) is arranged between the first fixing ring (72) and the first dynamic ring (41).

8. A double mechanical seal with circulating cooling according to claim 4, characterized in that A second fixing ring (74) is arranged between the second dynamic ring (51) and the second supporting ring (53).

9. A double mechanical seal with circulating cooling according to claim 3, characterized in that, The impeller (2) is located above the first dynamic ring (41), and a third sealing ring (75) is arranged between the impeller (2) and the first dynamic ring (41).

10. A double mechanical seal with circulating cooling according to claim 4, characterized in that, A fourth sealing ring (76) is arranged between the sealing part (3) and the second static ring (52).

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