Leakage-free air blower

Abstract

The utility model discloses a leakage-free air blower, which comprises an air blower, a nitrogen pump, an expansion ring and a sealing sleeve, and is characterized in that the nitrogen pump is connected onto the air blower, the nitrogen pump is connected with a spacer ring, the spacer ring is connected into the air blower, the sealing sleeve is connected into the air blower, and the expansion ring is connected onto the sealing sleeve; the utility model has the beneficial effects that the shaft end adopts a single mechanical seal structure, compared with a common fan adopting four mechanical seals, the manufacturing cost is low, low cost and zero leakage can be realized, the expansion ring seal is adopted, gaps are formed among the seals, the abrasion is avoided, quick-wear parts are reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blowers, in particular to a leak-free blower. Background Art

[0002] As an air supply machine, the traditional sealing method for blowers to prevent gas leakage is a labyrinth seal + skeleton oil seal, or a skeleton oil seal + reflux groove sealing structure. When a labyrinth seal is used, it is limited by the wall panel structure, especially in a compact design. Although the labyrinth seal can provide a certain degree of leakage control, it cannot completely eliminate the risk of leakage. In high-pressure gas transportation, leakage is still a problem; due to the friction between the moving parts in the skeleton oil seal plus labyrinth seal structure, it may experience wear, which may cause the sealing performance to deteriorate over time and require regular maintenance or replacement; when conveying toxic gases, the labyrinth seal structure may not meet the high requirements for sealing performance. For applications that require a higher level of sealing, we usually use a zero-leakage mechanical seal structure, but the cost of a mechanical seal is three times that of an ordinary blower, which is expensive and problematic. Utility Model Content

[0003] In view of the defects in the prior art, the utility model provides a leak-free blower to solve the existing problems.

[0004] The utility model is realized through the following technical scheme: a leak-free blower, comprising a blower, a nitrogen pump, an expansion ring and a sealing sleeve, characterized in that: the blower is connected to the nitrogen pump, the air outlet end of the nitrogen pump is connected to the spacer ring, the spacer ring is connected in the blower, the sealing sleeve is connected in the blower, and the expansion ring is connected on the sealing sleeve.

[0005] Preferably, the blower shaft end is connected to a mechanical sealing device.

[0006] Preferably, the expansion ring is located between the sealing sleeve and the blower.

[0007] Preferably, the spacer ring is provided with a plurality of through holes.

[0008] The beneficial effects of the utility model are embodied in: the shaft end adopts a single mechanical seal structure, which is less expensive than the ordinary fan using four mechanical seals, can achieve low-cost zero leakage, adopts an expansion ring seal, there is a gap between the seals, there is no wear, reduces wearing parts, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the spacer ring of the utility model.

[0012] In the attached drawings, 1. mechanical sealing device, 2. nitrogen pump, 3. expansion ring, 4. sealing sleeve, 5. spacer ring, 6. blower. DETAILED DESCRIPTION

[0013] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0014] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0015] For ease of description, spatial relative terms such as "upper," "lower," "left," and "right" may be used herein to describe the relationship of one element or feature shown in a figure relative to another element or feature. It should be understood that the spatial terms are intended to include different orientations of the device in use or operation in addition to the orientation shown in the figures. For example, if the device in the figure is inverted, elements described as being "below" other elements or features will be positioned "above" the other elements or features. Thus, the exemplary term "below" may include both upper and lower orientations.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0017] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation of the present invention is described in detail below in conjunction with specific embodiments: Figure 1-Figure 2 The utility model shown is realized by the following technical scheme: a leak-free blower, comprising a blower 6, a nitrogen pump 2, an expansion ring 3 and a sealing sleeve 4, characterized in that: the blower 6 is connected to the nitrogen pump 2, the air outlet end of the nitrogen pump 2 is connected to the spacer ring 5, the spacer ring 5 is connected inside the blower 6, the sealing sleeve 4 is connected inside the blower 6, and the expansion ring 3 is connected to the sealing sleeve 4.

[0018] The shaft end of the blower 6 is connected to the mechanical sealing device 1 .

[0019] The expansion ring 3 is located between the sealing sleeve 4 and the blower 6 .

[0020] The spacer ring 5 is provided with a plurality of through holes.

[0021] The working principle of the utility model is as follows: when conveying toxic gas, first open 2 nitrogen pumps to allow nitrogen to pass through the small hole on the spacer ring 5 and form a layer of "nitrogen curtain" between the sealing sleeve 4. When the gas leaks through this, it first encounters three expansion rings 3. The incision gap of the expansion ring 3 is very small. After being sealed by the three expansion rings 3, only a small amount of gas leaks out. When the leaked gas reaches the "nitrogen curtain", since the pressure of the nitrogen source is much greater than the pressure of the conveying gas, the solid conveying gas cannot pass through the "nitrogen curtain", and nitrogen is an inert gas, which avoids chemical reaction with the conveying gas.

[0022] After the lubricating oil in the oil tank lubricates the bearing, it returns to the oil tank through the oil return groove, but a small amount of lubricating oil still diffuses into the engine cavity. When it encounters the "nitrogen curtain", it will be blocked and return to the oil tank again through the oil return groove.

[0023] One end of the blower is sealed with a mechanical seal, which effectively prevents lubricating oil from leaking from the shaft end.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A leak-free blower, comprising a blower (6), a nitrogen pump (2), an expansion ring (3) and a sealing sleeve (4), characterized in that: The blower (6) is connected to a nitrogen pump (2), the outlet end of the nitrogen pump (2) is connected to a spacer ring (5), the spacer ring (5) is connected inside the blower (6), the inside of the blower (6) is connected to a sealing sleeve (4), and the sealing sleeve (4) is connected to an expansion ring (3).

2. A leak-free blower according to claim 1, characterized in that: The shaft end of the blower (6) is connected to the mechanical sealing device (1).

3. A leak-free blower according to claim 1, characterized in that: The expansion ring (3) is located between the sealing sleeve (4) and the blower (6).

4. A leak-free blower according to claim 1, characterized in that: The spacer ring (5) is provided with a plurality of through holes.

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