Mechanical seal device for salt mining boat

Abstract

The utility model discloses a kind of mechanical sealing devices for salt-extracting ship, including gland fixed on pump cover and shaft sleeve fixed on pump shaft, dynamic ring and static ring are correspondingly arranged on shaft sleeve, further include compensation sealing assembly, the compensation sealing assembly includes spring seat, spring and push ring, the spring seat is connected with gland by positioning sleeve and bolt, spring and push ring are installed in spring seat, push ring is in contact with static ring end face, the static ring is tightly pressed in dynamic ring end face by spring and push ring, and end face friction pair is formed.The utility model adopts automatic compensation wear design, prolongs service life, and prevents sudden leakage;Cancel cooling water design, completely realize the normal operation of salt-extracting ship in unattended condition, and operation and maintenance cost is reduced;Open type heat dissipation structure is particularly suitable for water shortage or poor water quality working condition.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical seal technology, and in particular relates to a mechanical seal device for salt harvesting ships. Background Technology

[0002] The development and utilization of salt lakes has a long history and has achieved remarkable success in modernization. With technological advancements and diversified resource utilization, salt lakes will become an important area for future mineral resource development. Mechanical seals, as crucial components of salt-harvesting vessels, directly affect the efficiency of salt lake extraction. Currently, most salt-harvesting vessels use packing seals, which suffer from serious leakage, short service life, and inability to operate unattended. Leaks pose a risk of sinking the vessel and rendering equipment unusable due to brine ingress. To address these problems, this invention proposes a mechanical seal device for salt-harvesting vessels. This device features a long service life, low leakage risk, and, considering the absence of fresh water in salt lakes, employs a waterless design, enabling unattended operation of the salt-harvesting vessel. This represents a highly promising mechanical seal for salt-harvesting vessels. Utility Model Content

[0003] The purpose of this invention is to provide a mechanical sealing device for salt harvesting vessels, which can completely solve the shortcomings of the existing technology.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A mechanical seal device for a salt harvesting vessel includes a gland fixed to a pump cover and a bushing fixed to a pump shaft. A rotating ring and a stationary ring are correspondingly arranged on the bushing. The device also includes a compensating seal assembly, which includes a spring seat, a spring, and a push ring. The spring seat is connected to the gland via a positioning sleeve and bolts. The spring and the push ring are installed inside the spring seat. The push ring contacts the end face of the stationary ring. The stationary ring is pressed tightly against the end face of the rotating ring by the spring and the push ring, forming an end face friction pair.

[0006] Preferably, the end faces of both the stationary ring and the moving ring are made of hard alloy material or silicon carbide material.

[0007] Preferably, both the inner wall of the bushing and the end face of the gland are provided with O-rings.

[0008] Preferably, the axes of the moving ring and the stationary ring coincide with the centerline of the pump shaft.

[0009] Preferably, an O-ring is provided between the bushing and the rotating ring.

[0010] Preferably, the roughness Ra of the end faces of the moving ring and the stationary ring is ≤0.2μm.

[0011] Compared with the prior art, the advantages of this utility model are as follows: it adopts an automatic wear compensation design to extend service life and eliminate sudden leakage; it eliminates the cooling water design, enabling the salt harvesting vessel to operate normally without human intervention, thus reducing maintenance costs; and its open heat dissipation structure is particularly suitable for working conditions with water shortage or poor water quality. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the present invention;

[0013] Figure 2 This is a cross-sectional view of the pressure cap in this utility model;

[0014] Figure 3 This is a schematic diagram of the installation of the positioning sleeve in this utility model;

[0015] The markings in the attached diagram are: 1-shaft sleeve, 2-retaining ring, 3-spring seat, 4-hex bolt, 5-spring, 6-locating sleeve, 7-push ring, 8-pressure cap, 9-snap ring, 10-moving ring, 11-stationary ring, 12-O-ring seal. Detailed Implementation

[0016] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0017] like Figure 1 and Figure 2 As shown, a mechanical seal device for a salt harvesting vessel includes a pressure cap 8 fixed on a pump cover and a bushing 1 fixed on a pump shaft. A rotating ring 10 and a stationary ring 11 are correspondingly arranged on the bushing 1. The device also includes a compensating sealing assembly, which includes a spring seat 3, a spring 5, and a push ring 7. The spring seat 3 is connected to the pressure cap 8 through a positioning sleeve 6 and a hexagonal bolt 4 to ensure that the stationary ring 11 does not rotate with the pump shaft. The spring 5 and the push ring 7 are installed inside the spring seat 3. The push ring 7 contacts the end face of the stationary ring 11. The stationary ring 11 is pressed tightly against the end face of the rotating ring 10 by the spring 5 and the push ring 7, forming an end face friction pair.

[0018] During operation, spring 5, through push ring 7, ensures a tight fit between the stationary ring 11 and the end face of the rotating ring 10, thus preventing leakage of the pump medium. During long-term operation, the end face of the stationary ring 11 gradually wears due to friction. Spring 5 continuously applies axial thrust, pushing push ring 7 to dynamically compensate for the stationary ring 11 and maintain contact at the sealing surface. Spring seat 3, spring 5, and push ring 7 are completely exposed to air, eliminating the need for a closed cooling water chamber. The heat generated by the friction pair is quickly dissipated through air convection and metal conduction, with measured temperature rise 15-20°C lower than traditional water-cooled seals. Furthermore, if small particles in the brine enter the sealing surface, they can be thrown out by centrifugal force, preventing accumulation and jamming (suitable for media with a solid content ≤30%). This also eliminates the need for an external cooling water system, reducing energy consumption and water treatment costs.

[0019] The positioning sleeve 6 is mainly used to fix the spring seat 3 and the push ring 7, maintaining the stability and concentricity of the spring 5. The pressure cap 8 is fixed to the pump cover by connecting screws, serving as a support base for the compensating sealing assembly, and achieving static sealing through the O-ring 12.

[0020] In this embodiment, the end faces of both the stationary ring 11 and the moving ring 10 are made of hard alloy or silicon carbide. Therefore, the sealing surface has sufficient wear resistance, a wear-resistant design to cope with solid particles in the brine.

[0021] In this embodiment, the inner wall of the bushing 1 is provided with an O-ring seal 12 to prevent medium leakage along the shaft. The end face of the gland 8 is provided with an O-ring seal 12 to seal the axial gap between the gland 8 and the pump cover, preventing medium from seeping outward.

[0022] In this embodiment, the axes of the moving ring 10 and the stationary ring 11 coincide with the center line of the pump shaft, thereby ensuring that the sealing surface is subjected to uniform force and reducing the risk of uneven wear.

[0023] In this embodiment, the rotating ring 10 is fixed to the outer wall of the bushing 1 and limited by the retaining ring 9. An O-ring 12 is provided between the bushing 1 and the rotating ring 10 to prevent the medium from leaking along the shaft.

[0024] In this embodiment, the roughness Ra of the end faces of the moving ring 10 and the stationary ring 11 is ≤0.2μm.

[0025] The O-ring 12 in this invention is used to compensate for and seal leak points.

[0026] This utility model adopts an open structural design, which allows the seal to be in maximum contact with the external environment by opening the connection and installation position of the sealing ring. The heat generated by the sealing ring during operation is dissipated by heat transfer and heat convection, eliminating the need for cooling through flushing and improving the service life of the seal.

[0027] This utility model has a simple gland structure and requires less material for processing, which can reduce metal consumption compared to an integral gland; when a part is damaged, only the positioning sleeve needs to be replaced, without the need to disassemble the entire gland, saving downtime and spare parts costs.

[0028] The modular design of this invention allows for individual adjustment of the axial position of the positioning sleeve, facilitating compensation for machining errors or wear gaps and improving sealing adaptability.

[0029] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the inventive aspect lies in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0030] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0031] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of this invention and form different embodiments.

[0032] It should be noted that the above embodiments are illustrative of the present invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mechanical seal device for a salt harvesting vessel, comprising a gland fixed to a pump cover and a bushing fixed to a pump shaft, wherein a dynamic ring and a stationary ring are correspondingly disposed on the bushing, characterized in that: It also includes a compensating sealing assembly, which includes a spring seat, a spring, and a push ring. The spring seat is connected to the gland by a positioning sleeve and bolts. The spring and push ring are installed inside the spring seat. The push ring contacts the end face of the stationary ring. The stationary ring is pressed tightly against the end face of the moving ring by the spring and the push ring to form an end face friction pair.

2. The mechanical seal device for salt harvesting vessels according to claim 1, characterized in that: The end faces of both the stationary and rotating rings are made of hard alloy or silicon carbide.

3. The mechanical seal device for salt harvesting vessels according to claim 1, characterized in that: Both the inner wall of the bushing and the end face of the gland are provided with O-ring seals.

4. The mechanical seal device for salt harvesting vessels according to claim 1, characterized in that: The axes of the rotating ring and the stationary ring coincide with the centerline of the pump shaft.

5. The mechanical seal device for salt harvesting vessels according to claim 1, characterized in that: An O-ring is provided between the bushing and the rotating ring.

6. The mechanical seal device for salt harvesting vessels according to claim 1, characterized in that: The roughness Ra of the end faces of the moving ring and the stationary ring is ≤0.2μm.

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