Multi-stage pump mechanical sealing structure

Abstract

The utility model discloses a multistage pump mechanical seal structure, which relates to the technical field of multistage pump sealing, and comprises a connecting flange and a threaded mounting groove, the lower end of the connecting flange is provided with a stationary ring main body, the outside of the stationary ring main body is provided with the threaded mounting groove, and the upper end of the outside of the stationary ring main body is provided with a first clamping groove; a first clamping groove is formed in the upper end of the static ring body, a first rubber ring is connected into the first clamping groove, a movable ring body is arranged outside the static ring body, a second clamping groove is formed in the upper end of the exterior of the movable ring body, a second rubber ring is connected into the second clamping groove, a threaded butt joint groove is formed in the inner side of the movable ring body, and a sealing ring is arranged at the lower end of the movable ring body. A mounting ring is mounted at the lower end of the sealing ring, a spring is connected to the outside of the mounting ring, and a movable ring seat is arranged outside the spring. According to the multi-stage pump mechanical sealing structure, a single part can be rapidly replaced after being damaged, the machining cost is reduced, and meanwhile the overall practicability of the mechanical sealing structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-stage pump seals, in particular to a multi-stage pump mechanical seal structure. Background Art

[0002] A multistage pump refers to a centrifugal pump with two or more impellers, which are connected in series through a shaft to form a multistage centrifugal pump. The working principle of a multistage pump is to connect multiple centrifugal pumps with the same function in series to form a multistage structure. This structure enables the multistage pump to generate a higher head and is suitable for applications requiring higher pressure. In order to improve the efficiency of the multistage pump, a mechanical seal structure is required. However, the existing mechanical seal structure still has the following shortcomings:

[0003] For example, the utility model with publication number CN209925276U discloses a balancing disk and mechanical seal structure for a multi-stage pump. The utility model can be used for the balancing disk and mechanical seal of a multi-stage pump, and has a novel and reasonable structure, low cost, reliable performance, and long service life. However, similar to the comparative documents of the above-mentioned application, when the existing mechanical seal structure is used, since most mechanical seal structures are multi-in-one structures, the mechanical seal structure needs to be completely replaced after a single component is damaged, thereby increasing the cost of use, resulting in a decrease in the practicality of the mechanical seal structure and a decrease in the efficiency of use.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a multi-stage pump mechanical seal structure is proposed. Utility Model Content

[0005] The purpose of the present utility model is to provide a multi-stage pump mechanical seal structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-stage pump mechanical seal structure, comprising a connecting flange and a threaded mounting groove, a static ring body is provided at the lower end of the connecting flange, and a threaded mounting groove is provided on the outside of the static ring body, and a first clamping groove is provided on the upper end of the outside of the static ring body, and a first rubber ring is connected to the inside of the first clamping groove, a dynamic ring body is provided on the outside of the static ring body, and a second clamping groove is provided on the upper end of the outside of the dynamic ring body, and a second rubber ring is connected to the inside of the second clamping groove, a threaded docking groove is provided on the inside of the dynamic ring body, and a sealing ring is provided at the lower end of the dynamic ring body, and a mounting ring is installed at the lower end of the sealing ring, and a spring is connected to the outside of the mounting ring, a dynamic ring seat is provided on the outside of the spring, and a limiting groove is provided on the upper end of the inside of the dynamic ring seat, and a positioning block is added to the lower end of the inner side of the dynamic ring seat.

[0007] Furthermore, the outer dimensions of the stationary ring body are adapted to the inner dimensions of the dynamic ring body, and the stationary ring body is rotatably connected to the dynamic ring body via a threaded mounting groove.

[0008] Furthermore, the inner dimension of the first clamping groove is adapted to the outer dimension of the first rubber ring, and the first rubber ring is connected to the stationary ring body through the first clamping groove.

[0009] Furthermore, the inner dimension of the second clamping groove is adapted to the outer dimension of the second rubber ring, and the second rubber ring is connected to the dynamic ring body through the second clamping groove.

[0010] Furthermore, the outer side of the sealing ring and the outer side of the mounting ring are horizontally distributed, and the sealing ring and the mounting ring are fixedly connected.

[0011] Furthermore, the mounting ring is embedded in the spring, and the inner side of the spring is tightly fitted with the outer side of the mounting ring.

[0012] Furthermore, the inner dimensions of the limiting groove are adapted to the outer dimensions of the sealing ring, and the sealing ring is embedded in the dynamic ring seat through the limiting groove.

[0013] Furthermore, the outer dimensions of the positioning block are adapted to the inner dimensions of the dynamic ring seat, and the outer side of the positioning block is tightly fitted to the inner side of the dynamic ring seat.

[0014] The utility model provides a multi-stage pump mechanical seal structure, which has the following beneficial effects:

[0015] 1. The present invention uses a threaded mounting groove to match the internal dimensions of the dynamic ring body with the external dimensions of the static ring body when the multi-stage pump mechanical seal structure is used. At the same time, the threaded docking groove provided inside the dynamic ring body matches the threaded mounting groove, so that the static ring body can be rotatably installed into the dynamic ring body. When the static ring body is rotatably installed with respect to the dynamic ring body, the first rubber ring is used to increase the overall sealing performance after installation, so that the mechanical seal structure can be disassembled and installed while increasing the overall sealing performance, thereby improving the overall use efficiency and usability of the multi-stage pump.

[0016] 2. The utility model provides a dynamic ring seat, and when the multi-stage pump mechanical seal structure is used, the second rubber ring can be connected to the dynamic ring body through the second clamping groove provided on the outside of the dynamic ring body, so that when the dynamic ring body is installed with the vertical multi-stage pump, the second rubber ring can be used to increase the installation sealing performance. The sealing ring is installed at the lower end of the dynamic ring body to prevent fluid leakage. At the same time, the spring is installed inside the dynamic ring seat through the positioning block. The elastic force of the spring makes the end faces of the friction pair fit closely, thereby ensuring the effectiveness of the seal. The dynamic ring seat provides structural stability for the mechanical seal structure, thereby improving the overall use efficiency of the mechanical seal structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional structural diagram of a multi-stage pump mechanical seal structure of the utility model;

[0018] Figure 2 This is a schematic diagram of a three-dimensional expanded bottom view of a multi-stage pump mechanical seal structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the three-dimensional expanded structure of a dynamic ring seat of a multi-stage pump mechanical seal structure of the utility model.

[0020] In the figure: 1. Connecting flange; 2. Static ring body; 3. Threaded mounting groove; 4. First clamping groove; 5. First rubber ring; 6. Dynamic ring body; 7. Second clamping groove; 8. Second rubber ring; 9. Threaded docking groove; 10. Sealing ring; 11. Mounting ring; 12. Spring; 13. Dynamic ring seat; 14. Limiting groove; 15. Positioning block. DETAILED DESCRIPTION

[0021] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] like Figures 1 to 3 As shown, a multi-stage pump mechanical seal structure includes a connecting flange 1 and a threaded mounting groove 3. A stationary ring body 2 is provided at the lower end of the connecting flange 1, and a threaded mounting groove 3 is provided on the outside of the stationary ring body 2, and a first clamping groove 4 is provided on the upper end of the outside of the stationary ring body 2. At the same time, a first rubber ring 5 is connected to the inside of the first clamping groove 4. The external size of the stationary ring body 2 is adapted to the internal size of the dynamic ring body 6, and the stationary ring body 2 is rotatably connected to the dynamic ring body 6 through the threaded mounting groove 3. The internal size of the first clamping groove 4 is adapted to the external size of the first rubber ring 5, and the first rubber ring 5 is connected to the stationary ring body 2 through the first clamping groove 4, and the threaded mounting groove provided on the outside of the stationary ring body 2 is provided. 3 enables the static ring body 2 to be rotatably installed with the dynamic ring body 6, and at the same time, the internal size of the dynamic ring body 6 matches the external size of the static ring body 2. At the same time, the threaded docking groove 9 provided in the dynamic ring body 6 matches the threaded installation groove 3, so that the static ring body 2 can be rotatably installed in the dynamic ring body 6, and the internal size of the first clamping groove 4 provided at the upper end of the static ring body 2 matches the external size of the first rubber ring 5. Therefore, when the static ring body 2 is rotatably installed with respect to the dynamic ring body 6, the first rubber ring 5 is utilized to increase the overall sealing performance after installation, so that the mechanical seal structure can be disassembled and installed while increasing the overall sealing performance, thereby improving the overall use efficiency and use dynamism of the multi-stage pump.

[0023] like Figures 1 to 3As shown, a dynamic ring body 6 is provided on the outside of the static ring body 2, and a second clamping groove 7 is provided at the upper end of the outer side of the dynamic ring body 6, and a second rubber ring 8 is connected to the inside of the second clamping groove 7, a threaded docking groove 9 is provided on the inner side of the dynamic ring body 6, and a sealing ring 10 is provided at the lower end of the dynamic ring body 6, and a mounting ring 11 is installed at the lower end of the sealing ring 10, and a spring 12 is connected to the outside of the mounting ring 11, and a dynamic ring seat 13 is provided on the outside of the spring 12, and a limiting groove 14 is provided at the upper end of the inner side of the dynamic ring seat 13, and a positioning block 15 is added to the lower end of the inner side of the dynamic ring seat 13, the internal size of the second clamping groove 7 is adapted to the external size of the second rubber ring 8, and the second rubber ring 8 is connected to the dynamic ring body 6 through the second clamping groove 7, the outer side of the sealing ring 10 is horizontally distributed with the outer side of the mounting ring 11, and the sealing ring 10 is fixedly connected to the mounting ring 11, the mounting ring 11 is embedded with the spring 12, and the inner side of the spring 12 is connected to the mounting ring The outer side of the mounting ring 11 fits tightly, the inner size of the limiting groove 14 is adapted to the outer size of the sealing ring 10, and the sealing ring 10 is embedded in the dynamic ring seat 13 through the limiting groove 14, the outer size of the positioning block 15 is adapted to the inner size of the dynamic ring seat 13, and the outer side of the positioning block 15 fits tightly with the inner side of the dynamic ring seat 13, and the second rubber ring 8 is connected to the dynamic ring body 6 through the second clamping groove 7 opened on the outside of the dynamic ring body 6, so that the second rubber ring 8 can be used to increase the installation sealing when the dynamic ring body 6 is installed with the vertical multi-stage pump, and the sealing ring 10 is installed at the lower end of the dynamic ring body 6, and the sealing ring 10 is used to prevent fluid leakage. At the same time, the spring 12 is installed inside the dynamic ring seat 13 through the positioning block 15. The elastic force of the spring 12 makes the end faces of the friction pair fit tightly, thereby ensuring the effectiveness of the seal, and the dynamic ring seat 13 provides structural stability for the mechanical seal structure, thereby improving the overall utilization efficiency of the mechanical seal structure.

[0024] In summary, when the multi-stage pump mechanical seal structure is used, the static ring body 2 is first installed at the lower end of the connecting flange 1, and the connecting flange 1 is used to make the mechanical seal structure tightly connected to the multi-stage pump. The internal size of the dynamic ring body 6 matches the external size of the static ring body 2. At the same time, the threaded docking groove 9 opened inside the dynamic ring body 6 matches the threaded mounting groove 3, so that the static ring body 2 can be rotatably installed inside the dynamic ring body 6. When the static ring body 2 is rotatably installed on the dynamic ring body 6, the first rubber ring 5 is used to increase the overall sealing after installation. Then, through the dynamic ring body 6 The second clamping groove 7 opened on the outside connects the second rubber ring 8 to the dynamic ring body 6, so that when the dynamic ring body 6 is installed with the vertical multi-stage pump, the second rubber ring 8 can be used to increase the installation sealing. The sealing ring 10 is installed at the lower end of the dynamic ring body 6 to prevent fluid leakage. At the same time, the spring 12 is installed inside the dynamic ring seat 13 through the positioning block 15. The elastic force of the spring 12 makes the end faces of the friction pair fit tightly, thereby ensuring the effectiveness of the seal. The dynamic ring seat 13 provides structural stability for the mechanical seal structure, thereby improving the overall utilization efficiency of the mechanical seal structure.

[0025] The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

Claims

1. A multi-stage pump mechanical seal structure, comprising a connecting flange (1) and a threaded mounting groove (3), characterized in that: The lower end of the connecting flange (1) is provided with a stationary ring body (2), and a threaded mounting groove (3) is provided on the outside of the stationary ring body (2), and a first clamping groove (4) is provided on the upper end of the outer side of the stationary ring body (2), and a first rubber ring (5) is connected inside the first clamping groove (4), and a dynamic ring body (6) is provided on the outside of the stationary ring body (2), and a second clamping groove (7) is provided on the upper end of the outer side of the dynamic ring body (6), and a second rubber ring is connected inside the second clamping groove (7). (8), a threaded docking groove (9) is provided on the inner side of the dynamic ring body (6), and a sealing ring (10) is provided on the lower end of the dynamic ring body (6), and a mounting ring (11) is installed on the lower end of the sealing ring (10), and a spring (12) is connected to the outside of the mounting ring (11), and a dynamic ring seat (13) is provided on the outside of the spring (12), and a limiting groove (14) is provided on the upper end of the inner side of the dynamic ring seat (13), and a positioning block (15) is added to the lower end of the inner side of the dynamic ring seat (13).

2. A multi-stage pump mechanical seal structure according to claim 1, characterized in that: The external dimensions of the stationary ring body (2) are adapted to the internal dimensions of the dynamic ring body (6), and the stationary ring body (2) is rotatably connected to the dynamic ring body (6) via a threaded mounting groove (3).

3. A multi-stage pump mechanical seal structure according to claim 1, characterized in that: The internal dimensions of the first clamping groove (4) are adapted to the external dimensions of the first rubber ring (5), and the first rubber ring (5) is connected to the stationary ring body (2) via the first clamping groove (4).

4. A multi-stage pump mechanical seal structure according to claim 1, characterized in that: The inner dimensions of the second clamping groove (7) are adapted to the outer dimensions of the second rubber ring (8), and the second rubber ring (8) is connected to the dynamic ring body (6) via the second clamping groove (7).

5. A multi-stage pump mechanical seal structure according to claim 1, characterized in that: The outer side of the sealing ring (10) and the outer side of the mounting ring (11) are horizontally distributed, and the sealing ring (10) and the mounting ring (11) are fixedly connected.

6. A multi-stage pump mechanical seal structure according to claim 1, characterized in that: The mounting ring (11) and the spring (12) are embedded in each other, and the inner side of the spring (12) is tightly fitted with the outer side of the mounting ring (11).

7. A multi-stage pump mechanical seal structure according to claim 1, characterized in that: The inner dimensions of the limiting groove (14) are adapted to the outer dimensions of the sealing ring (10), and the sealing ring (10) is embeddedly connected to the dynamic ring seat (13) via the limiting groove (14).

8. A multi-stage pump mechanical seal structure according to claim 1, characterized in that: The outer dimensions of the positioning block (15) are adapted to the inner dimensions of the dynamic ring seat (13), and the outer side of the positioning block (15) is tightly fitted to the inner side of the dynamic ring seat (13).

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