CN218935280U

CN218935280U - Self-circulation mechanical seal structure

Info

Publication number: CN218935280U
Application number: CN202223074190.0U
Authority: CN
Inventors: 何庭育; 程序
Original assignee: Zigong Mifengpai Mechanical Seals Co ltd
Current assignee: Zigong Mifengpai Mechanical Seals Co ltd
Priority date: 2022-11-18
Filing date: 2022-11-18
Publication date: 2023-04-28
Anticipated expiration: 2032-11-18

Abstract

The utility model adopts a self-circulation mechanical sealing structure, which comprises a shaft sleeve and a pumping ring; when the shaft sleeve rotates along with the rotating shaft, the first spiral bulge on the outer wall of the shaft sleeve can drive circulating liquid between the shaft sleeve and the pumping ring to move from one end to the other end, namely, the circulating liquid can realize self circulation through the power of the rotating shaft, and an independent pumping structure is not required to be arranged; simultaneously with the protruding setting of first spiral on the axle sleeve, also saved whole space to the coolant liquid can directly contact with the axle sleeve in the protruding promotion in-process of spiral, and then improved the radiating effect to the axle sleeve.

Description

Self-circulation mechanical seal structure

Technical Field

The utility model relates to the technical field of mechanical sealing, in particular to a self-circulation mechanical sealing structure.

Background

In the industries of petroleum refining and chemical industry, more than 80% of rotating equipment for conveying liquid media are mechanically sealed. The mechanical seal auxiliary system with good work is a necessary condition for ensuring long service life of the mechanical seal. In the related art, a sealing protection liquid or a separation liquid is required to be arranged outside the mechanical seal, and the sealing protection liquid or the separation liquid can circularly flow to take away heat generated by the sealing end face, so that the sealing working temperature is reduced. It is presently desirable to provide a separate pumping arrangement to facilitate circulation of the seal protecting or spacer fluid.

There is therefore a need for a self-circulating mechanical seal that overcomes the above-described problems.

Disclosure of Invention

In order to overcome the problems, the utility model provides a self-circulation mechanical sealing structure.

The application provides a self-circulation mechanical seal structure, include:

the shaft sleeve is sleeved on the rotating shaft, and a first spiral protrusion is arranged on the outer wall of the shaft sleeve;

the pumping ring is sleeved outside the shaft sleeve, a first gap is formed between the pumping ring and the shaft sleeve, and the first gap is used for circulating liquid to flow; wherein the first spiral protrusion is at least partially disposed in the first gap to push the circulating liquid to flow in the first gap.

In some embodiments of the present application, the first spiral protrusion is wound on an outer wall of the shaft sleeve along a circumferential direction of the shaft sleeve, and a number of turns of the first spiral protrusion around the shaft sleeve is N, where N is a positive number greater than 1; and a spiral groove is formed between two adjacent circles of the first spiral protrusions, the spiral groove and the inner wall of the pumping ring form a circulating flow passage, and the circulating flow passage is used for guiding circulating liquid to flow.

In some embodiments of the present application, the first helical protrusions are each disposed within the first gap.

In some embodiments of the present application, the first helical protrusion is spaced from an inner wall of the pumping ring.

In some embodiments of the present application, the first spiral protrusion and the sleeve are of a unitary structure.

In some embodiments of the present application, a second helical protrusion is provided on a side of the pumping ring adjacent to the sleeve, the second helical protrusion being opposite to the helical direction of the first helical protrusion.

In some embodiments of the present application, the sealing structure further includes a sealing member, the sealing member is sleeved outside the pumping ring, and a circulating liquid cavity is formed between the sealing member and the shaft sleeve, and the circulating liquid cavity is communicated with the first gap.

In some embodiments of the present application, the circulating liquid chamber includes a water inlet portion and a water outlet portion, where the water inlet portion and the water outlet portion are disposed at two ends of the first gap.

The beneficial effects of the utility model are as follows: the utility model adopts a self-circulation mechanical sealing structure, which comprises a shaft sleeve and a pumping ring; when the shaft sleeve rotates along with the rotating shaft, the first spiral bulge on the outer wall of the shaft sleeve can drive circulating liquid between the shaft sleeve and the pumping ring to move from one end to the other end, namely, the circulating liquid can realize self circulation through the power of the rotating shaft, and an independent pumping structure is not required to be arranged; simultaneously with the protruding setting of first spiral on the axle sleeve, also saved whole space to the coolant liquid can directly contact with the axle sleeve in the protruding promotion in-process of spiral, and then improved the radiating effect to the axle sleeve.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1 in accordance with the present utility model;

fig. 3 is a schematic view of a partial structure of the present utility model.

Specific element symbol description:

100-rotating shaft, 200-sealing structure, 210-shaft sleeve, 220-pumping ring, 230-sealing piece, 211-first spiral protrusion, 231-sealing end face, 232-water outlet part, 233-water inlet part.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. The following detailed description of the embodiments of the utility model, provided in the accompanying drawings, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. Furthermore, the terms "horizontal," "vertical," "overhang" and the like do not denote a requirement that the component be absolutely horizontal or overhang, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 3, the present embodiment provides a self-circulation mechanical seal structure 200, which includes: a shaft sleeve 210 sleeved on the rotating shaft 100, and a first spiral protrusion 211 is arranged on the outer wall of the shaft sleeve 210; the pumping ring 220 is sleeved outside the shaft sleeve 210, and a first gap is formed between the pumping ring 220 and the shaft sleeve 210, and the first gap is used for circulating liquid to flow; wherein the first spiral protrusion 211 is at least partially disposed in the first gap to push the circulating liquid to flow in the first gap.

It should be explained that by driving the circulation liquid to flow, the circulation liquid can be returned to the pipeline after passing through the cooler storage tank, completing the self-circulation process.

When the shaft sleeve 210 rotates along with the rotating shaft 100, the first spiral protrusion 211 on the outer wall of the shaft sleeve can drive the circulating liquid between the shaft sleeve 210 and the pumping ring 220 to move from one end to the other end, namely, the circulating liquid can realize self-circulation through the power of the rotating shaft 100, and a separate pumping structure is not required to be arranged; meanwhile, the first spiral protrusion 211 is arranged on the shaft sleeve 210, so that the whole space is saved, and the cooling liquid can be directly contacted with the shaft sleeve 210 in the pushing process of the spiral protrusion, so that the heat dissipation effect of the shaft sleeve 210 is improved. Compared with the sealing, the sealing device has low cost, consumes little shaft power, has no other problems except one more working procedure with processing, and is economical and applicable.

It can be appreciated that when the rotary shaft 100 rotates, the circulating liquid in the first gap can be driven and sent out by inertia, so that the sealing surface can be better cooled, lubricated and other effects. Compared with an auxiliary flushing system, a thermosiphon effect and the like, the device can reduce cost, is easy to manufacture and process, is economical to use, and can achieve expected effects more directly.

In some embodiments, the circulating fluid may be a seal protecting fluid or an isolation buffer. The circulating liquid can take away the heat generated by the end face of the sealing structure 200, reduce the sealing working temperature and prolong the service life of the mechanical sealing structure 200.

In some embodiments of the present application, the first spiral protrusion 211 is wound on the outer wall of the shaft sleeve 210 along the circumferential direction of the shaft sleeve 210, and the number of turns of the first spiral protrusion 211 around the shaft sleeve 210 is N, where N is a positive number greater than 1; and a spiral groove is formed between two adjacent circles of the first spiral protrusions 211, and the spiral groove and the inner wall of the pumping ring 220 form a circulation flow path for guiding the circulation liquid to flow. The flowing distance of the circulating fluid on the surface of the shaft sleeve 210 can be lengthened, and the circulating cooling effect can be improved.

In some embodiments of the present application, the first spiral protrusions 211 are disposed in the first gap. Is beneficial to improving the driving effect on the circulating liquid.

In some embodiments of the present application, the first spiral protrusion 211 is spaced from the inner wall of the pumping ring 220. I.e. the two are in a clearance fit relationship.

In some embodiments of the present application, the first spiral protrusion 211 is integrally formed with the sleeve 210. Is beneficial to improving the stability of the whole structure.

In some embodiments of the present application, a second spiral protrusion is disposed on a side of the pumping ring 220 adjacent to the shaft sleeve 210, and the second spiral protrusion is opposite to the first spiral protrusion 211 in a spiral direction. Is beneficial to improving the driving effect on the circulating liquid.

In some embodiments of the present application, the sealing structure 200 further includes a sealing member 230, the sealing member 230 is sleeved outside the pumping ring 220, and a circulating fluid cavity is formed between the sealing member 230 and the shaft sleeve 210, and the circulating fluid cavity is communicated with the first gap.

It should be noted that, the circulation liquid cavity is led to each sealing end face 231, and when the circulation liquid flows in the circulation liquid cavity, the cooling and heat dissipation can be performed on the sealing end faces 231.

In some embodiments of the present application, the circulating liquid chamber includes a water inlet 233 and a water outlet 232, where the water inlet 233 and the water outlet 232 are disposed at two ends of the first gap.

While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing detailed disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements, and adaptations of the present application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within this application, and are therefore within the spirit and scope of the exemplary embodiments of this application.

Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the present application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the present application may be combined as suitable.

Likewise, it should be noted that in order to simplify the presentation disclosed herein and thereby aid in understanding one or more inventive embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof. This method of disclosure, however, is not intended to imply that more features than are presented in the claims are required for the subject application. Indeed, less than all of the features of a single embodiment disclosed above.

In some embodiments, numbers describing the components, number of attributes are used, it being understood that such numbers being used in the description of embodiments are modified in some examples by the modifier "about," approximately, "or" substantially. Unless otherwise indicated, "about," "approximately," or "substantially" indicate that the number allows for a 20% variation. Accordingly, in some embodiments, numerical parameters set forth in the specification and claims are approximations that may vary depending upon the desired properties sought to be obtained by the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and employ a method for preserving the general number of digits. Although the numerical ranges and parameters set forth herein are approximations that may be employed in some embodiments to confirm the breadth of the range, in particular embodiments, the setting of such numerical values is as precise as possible.

For each patent, patent application publication, and other material, such as articles, books, specifications, publications, documents, etc., cited in this application, the entire contents of which are hereby incorporated by reference into this application, except for the application history documents which are inconsistent or conflict with the contents of this application, and for documents which have limited the broadest scope of the claims of this application (currently or hereafter attached to this application). It is noted that the descriptions, definitions, and/or terms used in the subject matter of this application are subject to the use of descriptions, definitions, and/or terms in case of inconsistent or conflicting disclosure.

The foregoing has outlined the detailed description of the embodiments of the present application, and the detailed description of the principles and embodiments of the present utility model herein is provided by way of example only to facilitate the understanding of the method and core concepts of the present utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims

1. A self-circulating mechanical seal structure, comprising:

2. The self-circulation mechanical seal structure according to claim 1, wherein the first spiral protrusion is wound on an outer wall of the shaft sleeve along a circumferential direction of the shaft sleeve, and a number of turns of the first spiral protrusion around the shaft sleeve is N, N being a positive number greater than 1; and a spiral groove is formed between two adjacent circles of the first spiral protrusions, the spiral groove and the inner wall of the pumping ring form a circulating flow passage, and the circulating flow passage is used for guiding circulating liquid to flow.

3. The self-circulating mechanical seal of claim 2, wherein the first helical protrusions are each disposed within the first gap.

4. The self-circulating mechanical seal of claim 1, wherein the first helical protrusion is spaced from an inner wall of the pumping ring.

5. The self-circulating mechanical seal of claim 1, wherein the first helical protrusion is of unitary construction with the sleeve.

6. The self-circulating mechanical seal of claim 1, wherein a side of the pumping ring adjacent to the shaft sleeve is provided with a second helical protrusion, the second helical protrusion having a helical direction opposite to that of the first helical protrusion.

7. The self-circulating mechanical seal of claim 6, further comprising a seal member, wherein the seal member is disposed around the pumping ring, and wherein a circulating fluid chamber is formed between the seal member and the shaft sleeve, wherein the circulating fluid chamber is in communication with the first gap.

8. The self-circulating mechanical seal structure of claim 7, wherein the circulating fluid chamber includes a water inlet portion and a water outlet portion, the water inlet portion and the water outlet portion being disposed at both ends of the first gap.