Multi-stage pump mechanical sealing structure

Abstract

The utility model belongs to the technical field of multistage pumps, and particularly relates to a multistage pump mechanical seal structure which comprises a mechanical seal static ring, a mechanical seal moving ring, a spring and a positioning ring, the mechanical seal moving ring is connected to the right end of the mechanical seal static ring, the mechanical seal moving ring comprises a moving ring pipe, an annular groove and a ball, the moving ring pipe is arranged at the right end of the mechanical seal static ring, and the ball is arranged in the annular groove. An annular groove is formed in the inner side of the left end of the movable ring pipe, and balls are evenly distributed in the annular groove. The spring is connected to the right end of the movable ring pipe; the positioning ring is connected to the right end of the spring, the annular groove faces the mechanical seal static ring, the balls are arranged in the annular groove, the mechanical seal moving ring makes contact with the mechanical seal static ring through the balls, friction resistance is reduced, and abrasion caused by direct contact between the mechanical seal moving ring and the mechanical seal static ring is avoided.

Description

Technical Field

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

[0002] A multistage pump is a centrifugal pump that combines the inlet and outlet sections and the middle section through a tie rod. Its output water pressure can be very high, and it also relies on the rotation of the impeller to obtain centrifugal force, so that the material. When the gas density reaches the working range of the mechanical vacuum pump, it is extracted, and a high vacuum is gradually obtained. A multistage pump refers to a pump with two or more impellers. It relies on the rotation of the impeller to obtain centrifugal force to make the output water pressure very high, thereby transporting the material over a greater distance.

[0003] When a multi-stage pump is working at high speed, the rotating shaft drives the spring fixing sleeve to rotate, and mutual rotation and friction will occur between the mechanical seal dynamic ring and the mechanical seal static ring, which is likely to cause structural wear. For this reason, the present application proposes a multi-stage pump mechanical seal structure. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above problems and / or the problems existing in the existing multi-stage pump mechanical seal structure, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a multi-stage pump mechanical seal structure, in which the annular groove faces the mechanical seal static ring, and balls are arranged inside the annular groove. The mechanical seal dynamic ring contacts the mechanical seal static ring through the balls, thereby reducing friction resistance and avoiding direct contact and wear between the mechanical seal dynamic ring and the mechanical seal static ring.

[0007] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0008] A multi-stage pump mechanical seal structure, comprising:

[0009] Mechanical seal static ring;

[0010] The mechanical seal dynamic ring is connected to the right end of the mechanical seal static ring. The mechanical seal dynamic ring includes a dynamic ring tube, an annular groove and balls. The dynamic ring tube is arranged at the right end of the mechanical seal static ring. An annular groove is arranged inside the left end of the dynamic ring tube. Balls are evenly distributed inside the annular groove.

[0011] A spring connected to the right end of the dynamic ring tube;

[0012] A positioning ring is connected to the right end of the spring.

[0013] As a preferred solution of the multi-stage pump mechanical seal structure described in the utility model, the mechanical seal static ring includes a static ring tube and a retaining ring, and the retaining ring is arranged in the center of the outer wall of the static ring tube.

[0014] As a preferred solution of the mechanical seal structure of a multi-stage pump described in the utility model, wherein: the side wall of the positioning ring is provided with connecting holes, and the connecting holes are evenly distributed in an annular shape on the side wall of the positioning ring.

[0015] As a preferred solution of the multi-stage pump mechanical seal structure described in the utility model, the interior of the annular groove is filled with lubricating oil, and the balls are arranged in the lubricating oil.

[0016] As a preferred solution of the multi-stage pump mechanical seal structure described in the utility model, a movable gap is left between the static annular tube and the dynamic annular tube.

[0017] As a preferred solution of the multi-stage pump mechanical seal structure described in the utility model, a sealing gasket is provided at the connection position between the mechanical seal static ring and the mechanical seal dynamic ring.

[0018] As a preferred solution of the multi-stage pump mechanical seal structure described in the utility model, the two ends of the spring are respectively sleeved on the dynamic ring tube and the positioning ring.

[0019] Compared with the prior art: the utility model opens an annular groove on the inner side of the dynamic ring tube of the mechanical seal dynamic ring, the annular groove faces the mechanical seal static ring, and a ball is arranged inside the annular groove. The mechanical seal dynamic ring contacts the mechanical seal static ring through the ball, thereby reducing friction resistance and avoiding direct contact and wear between the mechanical seal dynamic ring and the mechanical seal static ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0021] Figure 1 This is a schematic diagram of the shaft side structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the static ring of the mechanical seal of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the mechanical seal dynamic ring of the utility model.

[0025] In the figure: 100 mechanical seal static ring, 110 static ring tube, 120 retaining ring, 200 mechanical seal dynamic ring, 210 dynamic ring tube, 220 annular groove, 230 ball, 300 spring, 400 positioning ring, 410 connecting hole. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0029] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] The utility model provides a multi-stage pump mechanical seal structure, the annular groove faces the mechanical seal static ring, and a ball is arranged inside the annular groove. The mechanical seal dynamic ring contacts the mechanical seal static ring through the ball, reducing friction resistance and avoiding direct contact between the mechanical seal dynamic ring and the mechanical seal static ring to cause wear. Figure 1-Figure 4 , including: a mechanical seal static ring 100, a mechanical seal dynamic ring 200, a spring 300 and a positioning ring 400.

[0031] The mechanical seal static ring 100, specifically, includes a static ring tube 110 and a retaining ring 120, wherein the retaining ring 120 is arranged at the center of the outer wall of the static ring tube 110, wherein the left end of the static ring tube 110 is connected to the fixed end cover, and the retaining ring 120 is blocked between the static ring tube 110 and the end cover to provide a limit and at the same time be used to support the gasket.

[0032] The mechanical seal dynamic ring 200 is connected to the right end of the mechanical seal static ring 100. The mechanical seal dynamic ring 200 includes a dynamic ring tube 210, an annular groove 220 and balls 230. The dynamic ring tube 210 is arranged at the right end of the mechanical seal static ring 100. The inner side of the left end of the dynamic ring tube 210 is provided with an annular groove 220. The balls 230 are evenly distributed inside the annular groove 220.

[0033] Among them, the structure of the dynamic ring tube 210 is as follows Figure 4 As shown, a convex structure is adopted, the annular groove 220 faces the mechanical seal static ring 100 at the left end, the annular groove 220 is filled with lubricating oil, the ball 230 is arranged in the lubricating oil, and the ball 230 is supported between the dynamic ring tube 210 and the mechanical seal static ring 100.

[0034] The spring 300 is connected to the right end of the dynamic ring tube 210, and the two ends of the spring 300 are respectively sleeved on the dynamic ring tube 210 and the positioning ring 400. The spring 300 provides elastic force so that the mechanical seal static ring 100 is pressed against the end cover under the action of the elastic force.

[0035] The positioning ring 400 is connected to the right end of the spring 300 . The side wall of the positioning ring 400 is provided with connecting holes 410 . The connecting holes 410 are evenly distributed in a circular shape on the side wall of the positioning ring 400 . Bolts pass through the connecting holes 410 to fix the positioning ring 400 on the rotating shaft.

[0036] In order to avoid direct contact and wear between the static annular tube 110 and the dynamic annular tube 210 , a movable gap is left between the static annular tube 110 and the dynamic annular tube 210 to avoid direct contact and wear between the static annular tube 110 and the dynamic annular tube 210 .

[0037] In order to ensure the sealing effect, a sealing gasket is provided at the connection position between the mechanical seal static ring 100 and the mechanical seal dynamic ring 200 to avoid leakage at the gap.

[0038] During specific use, the bolts fix the positioning ring 400 on the rotating shaft through the connecting hole 410, and the left end is pressed against the mechanical seal static ring 100 and connected to the end cover through the spring 300. When the rotating shaft rotates, the positioning ring 400 is synchronously driven to rotate. The positioning ring 400 will drive the dynamic ring tube 210 to rotate under the action of friction. When the dynamic ring tube 210 rotates, it contacts the mechanical seal static ring 100 through the ball 230. The mechanical seal dynamic ring 200 contacts the mechanical seal static ring 110 through the ball 230 to reduce friction resistance and avoid direct contact and wear between the mechanical seal dynamic ring 200 and the mechanical seal static ring 100.

[0039] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A multi-stage pump mechanical seal structure, characterized in that: include: Mechanical seal static ring (100); A machine seal dynamic ring (200) is connected to the right end of the machine seal static ring (100), the machine seal dynamic ring (200) comprising a dynamic ring tube (210), an annular groove (220) and balls (230), the dynamic ring tube (210) being arranged at the right end of the machine seal static ring (100), an annular groove (220) being provided on the inner side of the left end of the dynamic ring tube (210), and evenly distributed balls (230) being arranged inside the annular groove (220); A spring (300) connected to the right end of the dynamic ring tube (210); The positioning ring (400) is connected to the right end of the spring (300).

2. A multi-stage pump mechanical seal structure according to claim 1, characterized in that: The mechanical seal static ring (100) comprises a static ring tube (110) and a retaining ring (120), wherein the retaining ring (120) is arranged at the center of the outer wall of the static ring tube (110).

3. A multi-stage pump mechanical seal structure according to claim 1, characterized in that: The side wall of the positioning ring (400) is provided with connection holes (410), and the connection holes (410) are evenly distributed in an annular shape on the side wall of the positioning ring (400).

4. A multi-stage pump mechanical seal structure according to claim 1, characterized in that: The annular groove (220) is filled with lubricating oil, and the ball (230) is arranged in the lubricating oil.

5. A multi-stage pump mechanical seal structure according to claim 2, characterized in that: A movable gap is left between the static annular tube (110) and the dynamic annular tube (210).

6. A multi-stage pump mechanical seal structure according to claim 5, characterized in that: A sealing gasket is provided at the connection position between the mechanical seal static ring (100) and the mechanical seal dynamic ring (200).

7. A multi-stage pump mechanical seal structure according to claim 1, characterized in that: The two ends of the spring (300) are respectively sleeved on the moving ring tube (210) and the positioning ring (400).

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