Backflow type anti-leakage mechanism suitable for fan shaft
By designing a return leakage prevention mechanism, the negative pressure buffer chamber and return pipe are used to collect and introduce leaked gas or liquid between the fan shaft, the problem of leakage between the fan shaft and the body is solved, and higher sealing and operating efficiency are achieved.
Patent Information
- Application Number
- CN202421354548.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-14
AI Technical Summary
The gas or liquid between the fan shaft and the body is easily leaked to the environment through the gap between the fan shaft, resulting in air leakage.
A return-flow anti-leakage mechanism is designed, and a negative pressure buffer chamber is formed on the bearing seat of the fan rotating shaft through the bus cover, which collects leaked gas or liquid, and is introduced into the fan through the return pipe to prevent leakage.
Effectively prevent gas or liquid between the fan shaft and the body from leaking into the environment, improving the sealing and operating efficiency of the fan.
Smart Images
Figure CN222542682U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fan protection in environmental protection purification treatment, in particular to a backflow type anti-leakage mechanism suitable for fan shafts. Background Art
[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Fan is a customary abbreviation for gas compression and gas delivery machinery in China. The fans usually include ventilators, blowers, and wind turbines. And after a fan has been used for a long time, it is inevitable to encounter some difficult problems, such as: air leakage at the connection between the shaft and the shell.
[0003] Therefore, it is necessary to develop an anti-leakage mechanism suitable for fan shafts to solve the problem that gas or liquid between the fan shaft and the body easily leaks into the environment through the gap between the fan shafts in the prior art. Utility Model Content
[0004] The utility model overcomes the shortcomings of the prior art and provides a reflux anti-leakage mechanism suitable for fan shafts, wherein a negative pressure chamber is formed by a sealing cover sleeved on a fixing seat of the shaft, and a negative pressure buffer chamber is formed to collect gas or liquid leaked between the fan shafts. Under the action of negative pressure drainage, the gas or liquid leaked between the fan shafts is collected and introduced into the fan through a reflux pipe to prevent the gas or liquid between the fan shaft and the body from leaking into the environment.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a backflow anti-leakage mechanism suitable for the fan shaft, including a collector cover body, which is sleeved on the outside of the fan shaft connected to the fan body and the motor, and the collector cover body includes a pair of relatively arranged semi-closed air covers; the relatively arranged semi-closed air covers are matched to form a coaxially sleeved inner ring sleeve and an outer ring sleeve, and one end of the inner ring sleeve and the outer ring sleeve are connected by a side sealing plate; the sleeve hole on the inner ring sleeve is sleeved on the bearing seat of the fan shaft, and the open side of the collector cover body is installed on the outside of the fan body, and the collector cover body is connected to the air inlet of the fan body through a return pipe; and the inner ring sleeve, the outer ring sleeve and the side sealing plate form a negative pressure buffer chamber on the outside of the fan body and the fan shaft.
[0006] In a preferred embodiment of the utility model, the inner ring sleeve includes two inner curved plates arranged opposite to each other; the outer ring sleeve includes two outer curved plates arranged opposite to each other; and the side sealing plate includes two oppositely cut side sealing plates arranged opposite to each other.
[0007] In a preferred embodiment of the utility model, the semi-enclosed air hood includes a group of inner curved plates, outer curved plates, and bisected side sealing plates that are assembled and connected. The outer curved plate is provided on the coaxial hood outside the inner curved plate. A gap is reserved between the inner curved plate and the outer curved plate, and one end of the inner curved plate and the outer curved plate are connected and assembled by the bisected side sealing plate.
[0008] In a preferred embodiment of the utility model, a waste outlet is provided on the outer ring sleeve, one end of the return pipe is connected to the waste outlet, and the other end of the return pipe is connected to the drainage port of the air inlet.
[0009] In a preferred embodiment of the present invention, a regulating valve for adjusting the flux size in the reflux pipe is also arranged on the reflux pipe.
[0010] In a preferred embodiment of the utility model, the inner curved plates, the outer curved plates, and the cut side sealing plates of the relatively matched semi-enclosed air hood are respectively connected by welding, and a negative pressure buffer chamber is formed at the junction of the fan body and the fan shaft.
[0011] In a preferred embodiment of the utility model, the inner curved plates, the outer curved plates, and the cut side sealing plates of the relatively matched semi-enclosed air hood are connected and assembled by sealing splicing parts, and a negative pressure buffer chamber is formed at the connection between the fan body and the fan shaft.
[0012] In a preferred embodiment of the present invention, the sleeve depth of the inner ring sleeve is smaller than the sleeve depth of the outer ring sleeve, and the inner diameter of the outer ring sleeve is larger than the inner diameter of the inner ring sleeve.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] The utility model discloses a reflux anti-leakage mechanism suitable for fan shafts, which forms a negative pressure buffer chamber by sleeve-forming a collecting cover on the bearing seat of the fan shaft. The negative pressure buffer chamber is used to collect gas or liquid leaking between the fan shafts, and under the action of negative pressure drainage, the gas or liquid leaking between the fan shafts is collected and introduced into the fan through a reflux pipe to prevent the gas or liquid between the fan shaft and the body from leaking into the environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0016] Figure 1 It is a side view structural schematic diagram of a backflow type anti-leakage mechanism suitable for fan shafts in a preferred embodiment of the present invention;
[0017] Figure 2 It is a schematic diagram of a top view of a backflow anti-leakage mechanism suitable for fan shafts in a preferred embodiment of the present invention;
[0018] Figure 3 It is a schematic diagram of the top view of the structure of a converging cover body in a backflow type anti-leakage mechanism between fan shafts in a preferred embodiment of the present invention;
[0019] Figure 4It is a schematic cross-sectional structure diagram of a converging cover body in a backflow type anti-leakage mechanism between fan shafts in a preferred embodiment of the present invention;
[0020] Figure 5 It is a schematic diagram of the explosion structure of a converging cover body in a backflow type anti-leakage mechanism between fan shafts in a preferred embodiment of the present invention;
[0021] Figure 6 It is a structural schematic diagram of a sealing splicing member in a backflow anti-leakage mechanism between fan shafts in a preferred embodiment of the present invention;
[0022] Among them, 1-fan body, 11-air inlet, 111-drainage port, 13-air outlet, 2-fan shaft, 3-motor, 31-bearing seat, 4-collector cover, 40-sleeve hole, 41-semi-enclosed air cover, 42-inner ring sleeve, 421-inner curved plate, 43-side sealing plate, 431-cut side sealing plate, 44-outer ring sleeve, 441-outer curved plate, 45-sealing splicing part, 451-slotting slot, 46-waste outlet, 47-reflux pipe, 471-regulating valve, 48-negative pressure buffer chamber. DETAILED DESCRIPTION
[0023] The technical solution of the utility model is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the utility model and the specific features in the embodiments are detailed descriptions of the technical solution of the utility model, rather than limitations on the technical solution of the utility model. In the absence of conflict, the embodiments of the utility model and the technical features in the embodiments can be combined with each other.
[0024] The term "and / or" is only a description of the association relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " generally indicates that the related objects are in an "or" relationship. Example 1
[0025] like Figure 1-Figure 5As shown, a backflow anti-leakage mechanism suitable for fan shafts includes a collector cover 4, which is sleeved on the outside of the fan shaft 2 connected to the fan body 1 and the motor 3. The collector cover 4 includes a pair of semi-enclosed air covers 41 arranged oppositely; the semi-enclosed air covers 41 arranged oppositely are matched to form a coaxially sleeved inner ring sleeve 42 and an outer ring sleeve 44, and one end of the inner ring sleeve 42 and the outer ring sleeve 44 are connected by a side sealing plate 43. The sleeve hole 40 on the inner ring sleeve 42 is sleeved on the bearing seat 31 of the fan shaft 2, and the open side of the collector cover 4 is installed on the outside of the fan body 1. The sleeve depth of the inner ring sleeve 42 is less than the sleeve depth of the outer ring sleeve 44, and the inner diameter of the outer ring sleeve 44 is greater than the inner diameter of the inner ring sleeve 42. And the inner ring sleeve 42, the outer ring sleeve 44 and the side sealing plate 43 form a negative pressure buffer chamber 48 outside the fan body 1 and the fan shaft 2. Furthermore, the collecting cover 4 does not directly contact the fan shaft 2 .
[0026] Further, the inner ring sleeve 42 includes inner curved plates 421 arranged oppositely; the outer ring sleeve 44 includes outer curved plates 441 arranged oppositely; and the side sealing plates 43 include bisecting side sealing plates 431 arranged oppositely. The semi-enclosed air hood 41 includes a group of inner curved plates 421, outer curved plates 441, and bisecting side sealing plates 431, which are assembled and connected. The outer curved plate 441 is provided on the coaxial cover outside the inner curved plate 421. A gap is reserved between the inner curved plate 421 and the outer curved plate 441, and one end of the inner curved plate 421 and the outer curved plate 441 are connected and assembled through the bisecting side sealing plate 431. The inner curved plates 421, the outer curved plates 441, and the bisecting side sealing plates 431 of the semi-enclosed air hood 41 arranged oppositely are respectively connected by welding, and a negative pressure buffer chamber 48 is formed at the connection between the fan body 1 and the fan shaft 2.
[0027] More specifically, a pair of relatively arranged semi-enclosed air hoods 41 of the confluence cover body 4 are sleeved on the outside of the fan shaft 2 drivingly connected to the motor 3 and the fan body 1, and the inner ring sleeve 42 of the relatively arranged semi-enclosed air hood 41 is fixed on the bearing seat 31 of the fan shaft 2 (in this embodiment, for example Figure 1 As shown in the figure, the bearing seat 31 is located on the motor 3), one end of the outer ring sleeve 44 of the collector cover body 4 is connected to the outer shell of the fan body 1, and the outer ring sleeve 44 and the inner ring sleeve 42 of the collector cover body 4 and the side sealing plate 43 form a negative pressure buffer chamber 48 outside the fan shaft 2 that is driven and connected to the motor 3 and the fan body 1.
[0028] Furthermore, the confluence cover body 4 is connected to the air inlet 11 of the fan body 1 through the return pipe 47; a waste outlet 46 is provided on the outer ring sleeve 44, one end of the return pipe 47 is connected to the waste outlet 46, and the other end of the return pipe 47 is connected to the drainage port 111 of the air inlet 11. A regulating valve 471 for adjusting the flux size in the return pipe 47 is also provided on the return pipe 47. The regulating valve 471 adopts a regulating valve in the prior art, as long as it can achieve the regulation of the on-off amount of gas or liquid in the return pipe 47. Furthermore, the waste outlet 46 is arranged on the lower side of the outer ring sleeve 44; the drainage port 111 is arranged on the side or upper side of the air inlet 11 of the fan body 1. Example 2
[0029] like Figure 1-Figure 6 As shown, based on Example 1, in a preferred embodiment of the present invention, the inner curved plates 421, the outer curved plates 441, and the bisecting side sealing plates 431 of the relatively arranged semi-enclosed air hood 41 are connected and assembled by sealing splicing pieces 45, and a negative pressure buffer chamber 48 is formed at the connection between the fan body 1 and the fan shaft 2. Figure 6 As shown, the sealing splicing piece 45 adopts a sealing strip, and the two sides of the sealing strip are respectively provided with a pair of slots 451, and the inner ring sleeve 42, the inner ring sleeve 42, and the cut side sealing plate 431 can be respectively involved in the pair of slots 451 of the splicing piece 45. And the confluence cover body 4 is not in direct contact with the fan shaft 2. However, it is not limited to this. In other embodiments, the inner curved plates 421, the outer curved plates 441, and the cut side sealing plates 431 of the semi-enclosed air cover 41 can also be assembled and connected by screws, and the sealant is used to assist in sealing. Example 3
[0030] like Figure 1-Figure 6 As shown, based on Example 1 or Example 2, in a preferred embodiment of the present invention, the inner curved plates 421, the outer curved plates 441, and the bisecting side sealing plates 431 of the semi-enclosed air hood 41 relatively arranged in other embodiments can also be covered with heat shrink sleeves to cover the outer part of the relatively arranged semi-enclosed air hood 41. And the converging cover body 4 and the heat shrink sleeve are not in direct contact with the fan shaft 2.
[0031] The working principle is:
[0032] The utility model discloses a backflow anti-leakage mechanism suitable for fan shafts, which forms a negative pressure chamber by sleeve-forming a collecting cover body 4 on a fixing seat of a fan shaft 2, and a negative pressure buffer chamber 48 for collecting gas or liquid leaking between the shafts of a fan body 1. Under the action of negative pressure drainage, the gas or liquid leaking between the shafts of the fan body 1 is collected and introduced into the fan body 1 through a backflow pipe 47 to prevent the gas or liquid between the fan shaft 2 and the body of the fan body 1 from leaking to the environment.
[0033] Two semi-enclosed air hoods 41 are matched and sleeved on the outside of the fan shaft 2, and one end of the two matched semi-enclosed air hoods 41 is connected to the first side of the fan body 1, and the other end of the two matched semi-enclosed air hoods 41 is sleeved on the bearing seat 31 of the fan shaft 2 and the joint is sealed to form a closed negative pressure buffer chamber 48. When the fan body 1 starts working, suction is generated on the air inlet 11 of the fan body 1, and then discharged from the air outlet 13 of the fan body 1. At this time, the gas or liquid leaked between the fan shafts is collected through the negative pressure buffer chamber 48 of the converging cover body 4.
[0034] The semi-enclosed air hood 41 of the converging cover body 4 is provided with a waste outlet 46, one end of the return pipe 47 is connected to the waste outlet 46, and the other end of the return pipe 47 is connected to the drainage port 111 of the air inlet 11. This forms a negative pressure in the return pipe 47 and the converging cover body 4. Under the negative pressure drainage effect of the air inlet 11 of the fan body 1, the gas or liquid leaked between the shafts of the fan body 1 is collected and introduced into the air inlet 11 of the fan body 1 through the return pipe 47. In addition, a regulating valve 471 is provided on the return pipe 47 to control the balance between the negative pressure suction and the leakage amount.
[0035] Based on the ideal embodiment of the utility model, through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the invention. The technical scope of the invention is not limited to the content in the specification, and must be determined according to the scope of the claims.
Claims
1. A backflow anti-leakage mechanism suitable for fan shafts, characterized by: The invention comprises a collector cover body (4), the collector cover body (4) being sleeved on the outside of a fan shaft (2) connected to a fan body (1) and a motor (3), the collector cover body (4) comprising a pair of semi-enclosed air covers (41) arranged opposite to each other; the semi-enclosed air covers (41) arranged opposite to each other are matched to form a coaxially sleeved inner ring sleeve (42) and an outer ring sleeve (44), and one end of the inner ring sleeve (42) and the outer ring sleeve (44) are connected via a side sealing plate (43); the inner ring sleeve (4 The sleeve hole (40) on the fan body (2) is sleeved on the bearing seat (31) of the fan shaft (2), and the open side of the collector cover (4) is installed on the outside of the fan body (1), and the collector cover (4) is connected to the air inlet (11) of the fan body (1) through a return pipe (47); and the inner ring sleeve (42), the outer ring sleeve (44) and the side sealing plate (43) form a negative pressure buffer chamber (48) outside the fan body (1) and the fan shaft (2).
2. A backflow anti-leakage mechanism suitable for fan shafts according to claim 1, characterized in that: The inner ring sleeve (42) comprises two inner curved plates (421) arranged opposite to each other; the outer ring sleeve (44) comprises two outer curved plates (441) arranged opposite to each other; and the side sealing plate (43) comprises two oppositely cut side sealing plates (431) arranged opposite to each other.
3. A backflow anti-leakage mechanism suitable for fan shafts according to claim 2, characterized in that: The semi-enclosed air hood (41) comprises a group of inner curved plates (421), outer curved plates (441), and bisected side sealing plates (431) which are assembled and connected; the outer curved plates (441) are coaxially arranged outside the inner curved plates (421); a gap is reserved between the inner curved plates (421) and the outer curved plates (441); and one end of the inner curved plates (421) and the outer curved plates (441) are connected and assembled via the bisected side sealing plates (431).
4. A backflow anti-leakage mechanism suitable for fan shafts according to claim 3, characterized in that: The outer ring sleeve (44) is provided with a waste discharge port (46), one end of the return pipe (47) is connected to the waste discharge port (46), and the other end of the return pipe (47) is connected to the drainage port (111) of the air inlet (11).
5. A backflow anti-leakage mechanism suitable for fan shafts according to claim 4, characterized in that: The reflux pipe (47) is also provided with a regulating valve (471) for regulating the flux size in the reflux pipe (47).
6. A backflow anti-leakage mechanism suitable for fan shafts according to claim 4, characterized in that: The inner curved plates (421), the outer curved plates (441), and the bisecting side sealing plates (431) of the semi-enclosed air hood (41) that are arranged opposite to each other are respectively connected by welding, and the negative pressure buffer chamber (48) is formed at the connection between the fan body (1) and the fan shaft (2).
7. A backflow anti-leakage mechanism suitable for fan shafts according to claim 4, characterized in that: The inner curved plates (421), the outer curved plates (441), and the bisecting side sealing plates (431) of the semi-enclosed air hood (41) that are arranged opposite to each other are connected and assembled via sealing splicing pieces (45), and the negative pressure buffer chamber (48) is formed at the connection between the fan body (1) and the fan shaft (2).
8. The backflow anti-leakage mechanism suitable for fan shafts according to claim 1, characterized in that: The sleeve depth of the inner ring sleeve (42) is smaller than the sleeve depth of the outer ring sleeve (44), and the inner diameter of the outer ring sleeve (44) is larger than the inner diameter of the inner ring sleeve (42).