Dry type sealing structure of slurry pump

Abstract

The utility model relates to the technical field of slurry pumps, and provides a dry-type sealing structure of a slurry pump, which is arranged on a gland of a pump body and sleeved on a shaft sleeve, the gland is arranged on a shell, and the dry-type sealing structure of the slurry pump comprises an adjusting pressing sleeve which is arranged on the gland and sleeved on the shaft sleeve; the static ring is arranged on the shaft sleeve in a sleeving mode and abuts against the adjusting pressing sleeve. The movable ring is arranged on the shaft sleeve in a sleeving mode and abuts against the static ring. And the adjusting piece is rotationally arranged on the adjusting pressing sleeve and used for driving the adjusting pressing sleeve to press the static ring and the movable ring after rotating. By means of the technical scheme, the problem that in the prior art, an elastic compensation mechanism of an existing mechanical seal cannot achieve the needed pressing force due to the fact that the elastic force of a spring is insufficient, and leakage is caused is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of slurry pumps, and in particular to a dry-type sealing structure for a slurry pump. Background Art

[0002] Slurry pumps are centrifugal pumps. Conceptually, they are machines that increase the energy of a solid-liquid mixture by centrifugal force (the rotation of the pump's impeller), converting electrical energy into kinetic and potential energy. They are primarily used in industries such as mining, power plants, dredging, metallurgy, chemicals, building materials, and petroleum.

[0003] A slurry pump primarily consists of a pump head, bracket, and shaft seal. Mechanical seals are commonly used for shaft seals. These seals rely on the end faces of a static ring and a dynamic ring to press together. Fluid pressure and the spring force of an elastic compensating mechanism create an axial seal, preventing fluid leakage. However, the existing method of using spring force to compress the dynamic and static rings is prone to insufficient spring force, resulting in insufficient compression and leakage. Therefore, improvements are needed to address this issue. Utility Model Content

[0004] The utility model provides a dry seal structure for a slurry pump, which solves the problem in the related art that the elastic compensation mechanism of the existing mechanical seal is prone to failure to achieve the required pressing force due to insufficient spring elasticity, thereby causing leakage.

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

[0006] A dry seal structure for a slurry pump is provided on a gland of a pump body and sleeved on a shaft sleeve. The gland is provided on a housing and comprises:

[0007] An adjusting compression sleeve is arranged on the gland and sleeved on the shaft sleeve;

[0008] a stationary ring, sleeved on the shaft sleeve and abutting against the adjusting and pressing sleeve;

[0009] A dynamic ring is sleeved on the shaft sleeve and abuts against the static ring;

[0010] The adjusting member is rotatably arranged on the adjusting pressing sleeve and is used for driving the adjusting pressing sleeve to press the static ring and the dynamic ring after rotating.

[0011] As a further technical solution, the adjusting member, the adjusting pressing sleeve and the pressure cover are all threadedly arranged.

[0012] As a further technical solution, the stationary ring has a first end surface, and the dynamic ring has a second end surface, and the second end surface abuts against the first end surface.

[0013] As a further technical solution, the adjusting clamping sleeve has a stepped concave surface, and the stationary ring has a stepped convex surface. The stepped concave surface and the stepped convex surface have the same contour and abut against each other.

[0014] As a further technical solution, the shaft sleeve has a limiting portion, and the other end of the dynamic ring abuts against the limiting portion.

[0015] As a further technical solution, it also includes:

[0016] The sealing member is sleeved on the adjusting and pressing sleeve and is located between the pressure cover and the shell.

[0017] As a further technical solution, the adjusting and pressing sleeve has a stepped surface, the sealing member is sleeved on the stepped surface, and the inner wall profile of the sealing member is the same as the stepped surface.

[0018] As a further technical solution, the sealing member has a convex portion, the housing has a groove, and the convex portion is clamped in the groove.

[0019] As a further technical solution, it also includes:

[0020] A gasket is provided on the adjusting member, is located between the adjusting pressing sleeve and the pressing cover, and abuts against both the adjusting pressing sleeve and the pressing cover.

[0021] As a further technical solution, the stationary ring has a silicon carbide layer, and the dynamic ring has a rubber layer.

[0022] The working principle and beneficial effects of the utility model are as follows:

[0023] 1. In this utility model, the existing elastic compensation mechanism is no longer used. Instead, it is replaced by adjusting the clamping sleeve and adjusting parts. This not only makes installation convenient, but also allows the compression amount to be adjusted by locking the adjusting parts on the clamping sleeve. No spring adjustment is required, making the whole structure simpler and more reliable in slurry media.

[0024] 2. In this utility model, the stationary ring is made of silicon carbide and the rotating ring is made of rubber. The two are in contact and sealed. The rubber material avoids the disadvantages of silicon carbide material being hard and brittle, thus improving the service life of the mechanical seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The preferred embodiments 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 invention.

[0026] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0027] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of the middle part A;

[0028] Figure 3 This is a structural diagram of the sealing structure of the utility model applied to a slurry pump;

[0029] In the figure: 1. gland, 2. sleeve, 3. housing, 4. adjusting sleeve, 5. static ring, 6. dynamic ring, 7. adjusting part, 8. end face one, 9. end face two, 10. stepped inner concave surface, 11. stepped outer convex surface, 12. limiting part, 13. sealing part, 14. stepped surface, 15. convex part, 16. groove, 17. gasket. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, they can also be understood as further technical solutions without paying creative work. In some figures, components with the same structure or function are schematically illustrated, 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".

[0031] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0032] 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.

[0033] Example 1

[0034] Reference Figure 1~Figure 2, a dry seal structure for a slurry pump is proposed, which is installed on the gland 1 of the pump body and is arranged around the sleeve 2. Specifically, the gland 1 is fixed on the outer shell 3 to form a stable support base. The sealing structure mainly includes the following parts: an adjusting and pressing sleeve 4, which is assembled on the gland 1 and tightly wrapped around the outside of the sleeve 2, and plays the role of adjustment and compression; a static ring 5, which is sleeved on the sleeve 2, and its end face 1 8 is directly in contact with the adjusting and pressing sleeve 4 to form a static sealing interface; a dynamic ring 6, which is also sleeved on the sleeve 2 and abuts against the end face 2 9 opposite to the end face 1 8 of the static ring 5 to form a dynamic sealing fit; an adjusting part 7 is designed to be rotatably mounted on the adjusting and pressing sleeve 4. By rotating the adjusting part 7, the adjusting and pressing sleeve 4 can be moved along the thread direction, thereby compressing the static ring 5 and the dynamic ring 6 to ensure the sealing performance between the two. Furthermore, the static ring has an end face 1, and the dynamic ring has an end face 2, and the end face 2 abuts against the end face 1. Furthermore, the stationary ring has a silicon carbide layer, and the rotating ring has a rubber layer. Furthermore, it also includes a shim disposed on the adjusting member, located between the adjusting clamping sleeve and the pressure cap, and abutting against both the adjusting clamping sleeve and the pressure cap.

[0035] In this embodiment, in order to solve the problem that the elastic compensation mechanism of the existing mechanical seal in the prior art is prone to failure to achieve the required clamping force due to insufficient spring elasticity, thereby causing leakage, the existing elastic compensation mechanism is no longer used, but is replaced by an adjustable compression sleeve and an adjustment part. Not only is it easy to install, the compression amount can be adjusted by adjusting the adjustment part on the compression sleeve and locking it without the need for spring adjustment. The entire structure is simpler and more reliable in slurry media.

[0036] In addition, the static ring is made of silicon carbide and the dynamic ring is made of rubber. The two are in contact and sealed. The rubber material avoids the shortcomings of silicon carbide, which is hard and brittle, and increases the service life of the mechanical seal.

[0037] The specific working principle is as follows: the adjusting part 7 is connected to the adjusting pressure sleeve 4 and the pressure cover 1 by threaded connection, which is convenient for the operator to manually adjust the sealing pressure; the adjusting pressure sleeve 4 is provided with a stepped inner concave surface 10 matching the outer contour of the static ring 5, and the static ring 5 has a corresponding stepped outer convex surface 11, and the two are interlocked to ensure good positioning and contact sealing; a limit part 12 is provided on the sleeve 2 to limit the position of the dynamic ring 6 to prevent it from excessive movement.

[0038] Example 2

[0039] Reference Figures 1 to 3Compared with Example 1, further, the adjusting clamping sleeve has a stepped inner concave surface, the static ring has a stepped outer convex surface, the stepped inner concave surface and the stepped outer convex surface have the same contour and abut against each other. Further, the shaft sleeve has a limiting portion, and the other end of the dynamic ring abuts against the limiting portion. Further, it also includes a sealing member sleeved on the adjusting clamping sleeve, which is located between the pressure cover and the outer shell. Further, the adjusting clamping sleeve has a stepped surface, the sealing member is sleeved on the stepped surface, and the inner wall contour of the sealing member is the same as the stepped surface. Further, the sealing member has a convex portion, the outer shell has a groove, and the convex portion is stuck in the groove.

[0040] In this embodiment, the structure also includes a seal 13, which is arranged between the adjusting clamping sleeve 4 and the outer shell 3. At the same time, the seal 13 is installed at the stepped surface 14 of the adjusting clamping sleeve 4, and its inner wall contour is completely consistent with the stepped surface 14, thereby improving the overall sealing effect; the seal 13 has a convex portion 15, and a groove 16 is provided at the corresponding position of the outer shell 3, and the convex portion 15 is embedded in the groove 16, thereby enhancing the fixation and sealing between the seal and the outer shell; in order to further optimize the sealing performance and reduce wear, a gasket 17 is added at the position where the adjusting member 7 contacts the adjusting clamping sleeve 4 and the pressure cover 1, and the gasket 17 not only plays a buffering role but also ensures good sealing of the contact surface; finally, the surface of the static ring 5 is provided with a wear-resistant and high-temperature resistant silicon carbide layer, while the dynamic ring 6 adopts a rubber layer with elasticity and good sealing performance. The selection of these two materials helps to improve the service life and sealing efficiency of the sealing structure.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A dry seal structure for a slurry pump, arranged on a gland (1) of a pump body and sleeved on a shaft sleeve (2), wherein the gland (1) is arranged on a housing (3), and is characterized in that: include, An adjusting pressing sleeve (4) is arranged on the pressure cover (1) and sleeved on the shaft sleeve (2); A stationary ring (5) is sleeved on the shaft sleeve (2) and abuts against the adjusting and pressing sleeve (4); A dynamic ring (6) is sleeved on the shaft sleeve (2) and abuts against the static ring (5); An adjusting member (7) is rotatably disposed on the adjusting pressing sleeve (4) and is used to drive the adjusting pressing sleeve (4) to press the stationary ring (5) and the dynamic ring (6) after rotation.

2. A slurry pump dry seal structure according to claim 1, characterized in that: The adjusting member (7), the adjusting pressing sleeve (4) and the pressure cover (1) are all threadedly arranged.

3. A slurry pump dry seal structure according to claim 1, characterized in that: The stationary ring (5) has an end face 1 (8), and the dynamic ring (6) has an end face 2 (9), and the end face 2 (9) abuts against the end face 1 (8).

4. A slurry pump dry seal structure according to claim 1, characterized in that: The adjusting and clamping sleeve (4) has a stepped inner concave surface (10), and the stationary ring (5) has a stepped outer convex surface (11); the stepped inner concave surface (10) and the stepped outer convex surface (11) have the same contour and abut against each other.

5. A slurry pump dry seal structure according to claim 1, characterized in that: The shaft sleeve (2) has a limiting portion (12), and the other end of the movable ring (6) abuts against the limiting portion (12).

6. A slurry pump dry seal structure according to claim 1, characterized in that: Also includes, A sealing member (13) is sleeved on the adjusting and pressing sleeve (4) and is located between the gland (1) and the housing (3).

7. A slurry pump dry seal structure according to claim 6, characterized in that: The adjusting and pressing sleeve (4) has a stepped surface (14), the sealing member (13) is sleeved on the stepped surface (14), and the inner wall profile of the sealing member (13) is the same as that of the stepped surface (14).

8. A slurry pump dry seal structure according to claim 6, characterized in that: The sealing element (13) has a convex portion (15), the housing (3) has a concave portion (16), and the convex portion (15) is clamped in the concave portion (16).

9. A slurry pump dry seal structure according to claim 1, characterized in that: Also includes, A gasket (17) is arranged on the adjusting member (7), is located between the adjusting pressing sleeve (4) and the pressing cover (1), and is in contact with both the adjusting pressing sleeve (4) and the pressing cover (1).

10. A slurry pump dry seal structure according to claim 1, characterized in that: The stationary ring (5) has a silicon carbide layer, and the dynamic ring (6) has a rubber layer.

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