Reverse blowing fan and sealing device thereof
By adopting an adjustable sealing device in the back-dryer, the problems of uneven adjustment of seal gaps and uneven stress on expansion joints are solved, the tight bonding of seals and the safe operation of equipment are achieved, and gas leakage and deformation are prevented.
Patent Information
- Application Number
- CN202422093661.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-28
AI Technical Summary
The sealing gap of the existing backblown blower sealing device is unevenly adjusted after maintenance, resulting in the inability to tightly combine the gas seal, gas leakage occurs, and the axial stress of the expansion joint is uneven, which can easily lead to the equipment fission deformation and affect the safe operation of the equipment.
The sealing device is adopted, including a casing, sealing parts, expansion joints, sealing support seats, adjustment components and bases. The adjustment components connect the fixing plates and the casing to achieve adjustable control of the expansion joint force, preventing equipment deformation caused by high temperature differences and skewed sealing support seats, ensuring that the sealing parts are closely integrated.
Effectively prevent gas leakage, extend the equipment operation cycle, reduce damage to sealing devices and expansion joints, and ensure safe operation of the unit.
Smart Images
Figure CN223136459U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of the structural design of a reverse blower, in particular to a reverse blower and a sealing device thereof. Background Art
[0002] The reverse blower of a gas purification system mainly functions to pressurize the clean gas and perform reverse blowing and dust removal on the cylindrical bag. The sealing device of the reverse blower belongs to a key component of the unit. The sealing device can effectively prevent gas leakage and ensure the safe operation of the reverse blower. In practical applications, the original blower sealing device has the following problems:
[0003] 1. When the unit is repaired, the gap of the sealing device is adjusted. Under the action of the expansion joint, the sealing support seat is pushed, resulting in uneven gaps around the inner comb tooth sealing ring and the outer comb tooth sealing ring, causing a certain angle between the moving ring, the static ring and the shaft inside the gas seal and unable to be tightly combined, unable to accurately adjust the sealing gap, and resulting in gas leakage.
[0004] 2. The operating temperature of the blower impeller chamber is high, with a temperature difference of more than 150 °C from parts such as the bearing box and the sealing device. After the original expansion joint is installed, the force of the expansion joint cannot be controlled, and the axial up and down, left and right forces of the expansion joint are uneven, easily causing cracking and deformation of the connection part between the casing and the sealing seat.
[0005] Due to the existence of the above problems, the operation cycle of the equipment is greatly shortened, the damage frequency of the blower sealing device and the expansion joint is high, the spare part consumption cost is large, seriously affecting the safe operation of the unit.
[0006] Based on this, the existing technology still needs to be improved. Summary of the Utility Model
[0007] To solve the above technical problems, an embodiment of the utility model proposes a reverse blower and a sealing device thereof to solve the technical problems existing in the sealing device of the existing technology.
[0008] To solve the above technical problems, on the one hand, some embodiments of the utility model disclose a sealing device, including a casing, a sealing member, an expansion joint, a sealing support seat, an adjusting component and a base. The sealing support seat includes a base, a connecting part and a fixing plate. The bottom of the connecting part is vertically fixed on one side of the base. The fixing plate extends outward from the edge of the connecting part. The fixing plate is at least two. Among them,
[0009] The first end of the expansion joint is connected to the casing, and the second end of the expansion joint is connected to the first side of the connecting part;
[0010] The second side of the connecting part is fixedly connected to the sealing member;
[0011] The base is fixedly installed on the base;
[0012] A first connection component is provided on the fixed plate;
[0013] A second connection component is provided at a position of the casing opposite to the first connection component, and both ends of the adjusting component are respectively connected to the first connection component and the second connection component, so that the distance between the fixed plate and the casing is adjustable.
[0014] Further, the adjusting component is an adjusting bolt, the first connection component is a through hole, and the second connection component is a threaded hole; the adjusting bolt passes through the through hole and is fixed in the threaded hole.
[0015] Further, the adjusting component includes an adjusting rod and a clamping plate. The adjusting rod includes a sleeve and a rod. One end of the rod is threadedly installed in the first end of the sleeve, the clamping plate is fixed to the other end of the rod, and the second end of the sleeve is hinged to the second connection component; the clamping plate is buckled on the first connection component.
[0016] Further, the bottom of the connecting portion is vertically fixed to one side of the base by bolts.
[0017] Further, the expansion joint is made of 254SMo stainless steel.
[0018] Further, the first end of the expansion joint is connected to the casing through a connecting flange, and the second end of the expansion joint is connected to the first side of the connecting portion through a connecting flange.
[0019] Further, the base is fixedly connected to the base through bolts.
[0020] Further, the seal is a dry gas seal structure.
[0021] Further, the dry gas seal structure includes an inner labyrinth seal ring, an outer labyrinth seal ring, a moving ring, a stationary ring, a compression sleeve, a shaft sleeve, a fixing sleeve, a first outer sleeve and a second outer sleeve; wherein,
[0022] The second outer sleeve is of an L-shaped structure. The first outer sleeve and the second outer sleeve are connected and located outside the shaft sleeve, forming an annular structure with a concave cross-section. The first outer sleeve, the second outer sleeve and the shaft sleeve enclose an annular cavity, and one side of the first outer sleeve away from the second outer sleeve is fixedly connected to the connecting portion;
[0023] The shaft sleeve is press-connected to the fan rotor through the compression sleeve;
[0024] The moving ring is fixedly connected to the shaft sleeve; and the shaft sleeve, the compression sleeve and the moving ring rotate together with the fan rotor;
[0025] The first outer sleeve is connected to the shaft sleeve through the internal comb-tooth seal ring, and the internal comb-tooth seal ring is fixed on the first outer sleeve;
[0026] The second outer sleeve is connected to the compression sleeve through the external comb-tooth seal ring, and the external comb-tooth seal ring is fixed on the second outer sleeve;
[0027] The fixed sleeve is of an L-shaped structure. The outer wall of the fixed sleeve is fixedly connected to the inner wall of the second outer sleeve, and the stationary ring is fixed on the inner wall of the fixed sleeve;
[0028] Moreover, the moving ring and the stationary ring are hermetically connected through a sealing end face.
[0029] On the other hand, the embodiment of the present invention also discloses a reverse blower, including the above-mentioned sealing device.
[0030] Adopting the above technical solution, the present invention has at least the following beneficial effects:
[0031] For the reverse blower and its sealing device provided by the present invention, the seal, the seal support seat and the expansion joint are integrally structurally connected through the adjustment assembly and the fixing plate to form an adjustable thermal expansion sealing device, which controls the acting force on the expansion joint, prevents the equipment at the connection part from being pulled and cracked and deformed due to high temperature difference during the operation of the unit, and at the same time avoids the skew of the seal support seat caused by the uncontrollable force on the expansion joint, resulting in the inability of the internal structure of the seal to be tightly combined together, forming a gas leakage event. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.
[0033] Figure 1 FIG. is a schematic structural diagram of a sealing device disclosed in some embodiments of the present invention;
[0034] Figure 2 FIG. is a view in the direction A of a sealing device disclosed in some embodiments of the present invention;
[0035] Figure 3 FIG. is a partial cross-sectional view of the seal of the sealing device of a reverse blower disclosed in some embodiments of the present invention.
[0036] Explanation of the reference numerals in the drawings:
[0037] 1. Housing; 2. Seal; 3. Expansion joint; 4. Seal support seat; 41. Base; 42. Connection part; 43. Fixed plate; 5. Adjustment component; 6. Base; 7. Inner labyrinth seal; 8. Outer labyrinth seal; 9. Rotating ring; 10. Stationary ring; 11. Compression sleeve; 12. Sleeve; 13. Fixed sleeve; 141. First outer sleeve; 142. Second outer sleeve. Detailed implementation manners
[0038] The following further describes in detail the implementation manners of the present disclosure in conjunction with the drawings and embodiments. The detailed descriptions and drawings of the following embodiments are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms, not limited to the specific embodiments disclosed herein, but including all technical solutions falling within the scope of the claims.
[0039] These embodiments are provided by the present disclosure to make the present disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the components of materials, numerical expressions and values described in these embodiments should be construed as merely exemplary, rather than as limitations.
[0040] It should be noted that in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is greater than or equal to two; the orientation or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.
[0041] In addition, the "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "including" or "comprising" mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.
[0042] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.
[0043] All terms used in the present disclosure have the same meanings as understood by those of ordinary skill in the art to which the present disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in, for example, a general dictionary should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such herein.
[0044] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification.
[0045] Such as Figure 1 、 Figure 2As shown in the figure, some embodiments of the present utility model disclose a reverse hair dryer and its sealing device, including a casing 1, a seal 2, an expansion joint 3, a seal support base 4, an adjustment assembly 5, and a base 6. The seal support base 4 includes a base 41, a connecting portion 42, and a fixing plate 43. The bottom of the connecting portion 42 is vertically fixed to one side of the base 41. The fixing plate 43 extends outward from the edge of the connecting portion 42. There are at least two of the fixing plates 43. Among them, the first end of the expansion joint 3 is connected to the casing 1, and the second end of the expansion joint 3 is connected to the first side of the connecting portion 42. The second side of the connecting portion 42 is fixedly connected to the seal 2. The base 41 is fixedly installed on the base 6. A first connection assembly is provided on the fixing plate 43. A second connection assembly is provided at a position on the casing 1 opposite to the first connection assembly. Both ends of the adjustment assembly 5 are respectively connected to the first connection assembly and the second connection assembly, so that the distance between the fixing plate 43 and the casing 1 is adjustable. It should be noted that the connecting portion mentioned in the embodiments of the present utility model is generally plate-shaped. The above-mentioned first side and second side respectively refer to the two side surfaces of the connecting portion. By providing at least two fixing plates 43 at the edge of the connecting portion 42, a first connection assembly is provided on the fixing plate 43, a second connection assembly is provided at a position on the casing 1 opposite to the first connection assembly, and both ends of the adjustment assembly 5 are respectively connected to the first connection assembly and the second connection assembly. The seal 2, the seal support base 4, and the expansion joint 3 are integrally connected through the adjustment assembly 5 and the fixing plate 43. The setting of multiple fixing plates 43 makes the overall structure more stable when adjusting the length of the expansion joint 3. In addition, through the setting of the adjustment assembly 5, the distance between the fixing plate 43 and the casing 1 is adjustable, effectively controlling the acting force on the expansion joint 3. It can prevent the equipment at the connection part from being pulled and deformed due to high temperature difference during the operation of the unit, reduce the damage to the fan sealing device and the expansion joint, extend the operation cycle of the equipment, and at the same time prevent the vibrations of each part of the unit from interfering with each other, ensuring the safe operation of the unit.
[0046] For the reverse hair dryer and its sealing device disclosed in some embodiments of the present utility model, on the basis of the above embodiments, the adjustment assembly 5 can be an adjustment bolt. In this embodiment, the first connection assembly can be set as a through hole penetrating the fixing plate 43, and the second connection assembly is a threaded hole provided on the casing. The adjustment bolt is fixed in the threaded hole through the through hole. This threaded hole can be realized by welding a nut on the casing or by opening a through threaded hole in the thickness direction of the casing. Specifically, the distance between the fixing plate 43 and the casing 1 can be adjusted by rotating the nut and telescoping the bolt, thereby effectively controlling the acting force on the expansion joint 3.
[0047] The reverse blower and its sealing device disclosed in some embodiments of the present utility model. The structure of the adjustment component can also be realized by a telescopic buckling structure. Specifically, the adjustment component 5 may include an adjustment rod and a buckle plate. The adjustment rod includes a sleeve and a rod. One end of the rod is threadedly installed in the first end of the sleeve, and the buckle plate is fixed to the other end of the rod. The second end of the sleeve is hinged to the second connection component, and the buckle plate is buckled on the first connection component. By adjusting the relative position of the rod in the sleeve, the distance between the fixed plate 43 and the housing 1 can be adjusted. During use, the synchronism of the adjustment of multiple adjustment components can be determined according to the number of turns of the rotating adjustment rod, so as to effectively control the acting force on the expansion joint 3.
[0048] The reverse blower and its sealing device disclosed in some embodiments of the present utility model. On the basis of the above embodiments, the expansion joint 3 can be made of 254SMo stainless steel. The 254SMO stainless steel has excellent corrosion resistance and mechanical properties, and can better adapt to the strong corrosion of blast furnace gas, while compensating for the additional stress caused by temperature difference and mechanical vibration.
[0049] Such as Figure 3As shown in the figure, for the reverse blower and its sealing device disclosed in some embodiments of the present utility model, on the basis of the above embodiments, the seal 2 is a dry gas seal structure. The dry gas seal structure includes an inner labyrinth seal ring 7, an outer labyrinth seal ring 8, a dynamic ring 9, a static ring 10, a compression sleeve 11, a shaft sleeve 12, a fixing sleeve 13, a first outer sleeve 141 and a second outer sleeve 142. Among them, the second outer sleeve 142 is an L-shaped structure. The first outer sleeve 141 and the second outer sleeve 142 are connected and located outside the shaft sleeve 12, forming an annular structure with a concave cross-section. The first outer sleeve 141, the second outer sleeve 142 and the shaft sleeve 12 enclose an annular cavity. One side of the first outer sleeve 141 away from the second outer sleeve 142 is fixedly connected to the connecting part 42. The shaft sleeve 12 is press-connected to the blower rotor through the compression sleeve 11, which can effectively drive the rotation of the blower rotor and achieve the seal at the shaft sleeve. The dynamic ring 9 is fixedly connected to the shaft sleeve 12. And the shaft sleeve 12, the compression sleeve 11 and the dynamic ring 9 rotate together with the blower rotor. The first outer sleeve 141 is connected to the shaft sleeve 12 through the inner labyrinth seal ring 7, and the inner labyrinth seal ring 7 is fixed on the first outer sleeve 141. The second outer sleeve 142 is connected to the compression sleeve 11 through the outer labyrinth seal ring 8, and the outer labyrinth seal ring 8 is fixed on the second outer sleeve 142. During installation, a small gap is provided between the inner labyrinth seal ring 7 and the shaft sleeve 12, and between the outer labyrinth seal ring 8 and the compression sleeve 11, which can not only ensure the sealing effect, but also avoid collision or friction between components during the operation of the blower rotor. The fixing sleeve 13 can be an L-shaped structure. The outer wall of the fixing sleeve 13 is fixedly connected to the inner wall of the second outer sleeve 142, and the static ring 10 is fixed on the inner wall of the fixing sleeve 13. And, the dynamic ring 9 and the static ring 10 are sealed and connected through a sealing end face. Specifically, the static ring 10 can be connected to the fixing sleeve 13 through workpieces such as snap rings and springs, so that the dynamic ring 9 and the static ring 10 are closely attached to form a sealing surface to prevent medium leakage. Under normal working conditions, the gaps between the inner labyrinth seal ring 7 and the shaft sleeve 12, and between the outer labyrinth seal ring 8 and the compression sleeve 11 are small, and basically no medium leakage will occur. Even if there is a small amount of leakage, after passing through the narrow labyrinth structure in the annular cavity and the sealing end face between the dynamic ring 9 and the static ring 10, zero leakage of the medium is achieved.
[0050] In summary, for the reverse blower and its sealing device disclosed in the embodiments of the present utility model, the seal, the seal support seat and the expansion joint are integrally structurally connected through the adjusting assembly and the fixing plate to form an adjustable thermal expansion sealing device, which controls the acting force of the expansion joint, prevents the equipment at the connection part from being torn and deformed due to high temperature difference during the operation of the unit, and at the same time avoids the tilting of the seal support seat caused by the uncontrollable force of the expansion joint, resulting in the inability of the internal structure of the seal to be closely combined together, forming a gas leakage event.
[0051] So far, the embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.
[0052] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or partial technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way.
Claims
1. A sealing device, characterized in that, It includes a casing (1), a seal (2), an expansion joint (3), a seal support base (4), an adjustment assembly (5) and a base (6). The seal support base (4) includes a base (41), a connecting part (42) and a fixing plate (43). The bottom of the connecting part (42) is vertically fixed to one side of the base (41). The fixing plate (43) extends outward from the edge of the connecting part (42). There are at least two fixing plates (43). Among them, The first end of the expansion joint (3) is connected to the casing (1), and the second end of the expansion joint (3) is connected to the first side of the connecting part (42); The second side of the connecting part (42) is fixedly connected to the seal (2); The base (41) is fixedly installed on the base (6); A first connection assembly is provided on the fixing plate (43); A second connection assembly is provided at a position of the casing (1) opposite to the first connection assembly. Both ends of the adjustment assembly (5) are respectively connected to the first connection assembly and the second connection assembly, so that the distance between the fixing plate (43) and the casing (1) is adjustable.
2. The sealing device according to claim 1, characterized in that, The adjustment assembly (5) is an adjustment bolt, the first connection assembly is a through hole, and the second connection assembly is a threaded hole; the adjustment bolt passes through the through hole and is fixed in the threaded hole.
3. The sealing device according to claim 1, characterized in that, The adjustment assembly (5) includes an adjustment rod and a clamping plate. The adjustment rod includes a sleeve and a rod. One end of the rod is threadedly installed inside the first end of the sleeve. The clamping plate is fixed to the other end of the rod; the second end of the sleeve is hinged to the second connection assembly; the clamping plate is buckled on the first connection assembly.
4. The sealing device according to claim 1, characterized in that, The bottom of the connecting part (42) is vertically fixed to one side of the base (41) by bolts.
5. The sealing device according to claim 1, characterized in that, The expansion joint (3) is made of 254SMo stainless steel.
6. The sealing device according to claim 1, characterized in that, The first end of the expansion joint (3) is connected to the casing (1) through a connecting flange, and the second end of the expansion joint (3) is connected to the first side of the connecting part (42) through a connecting flange.
7. The sealing device according to claim 1, characterized in that, The base (41) is fixedly connected to the base (6) by bolts.
8. The sealing device according to claim 1, characterized in that, The seal (2) is a dry gas seal structure.
9. The sealing device according to claim 8, characterized in that, The dry gas seal structure includes an inner comb tooth seal ring (7), an outer comb tooth seal ring (8), a moving ring (9), a static ring (10), a compression sleeve (11), a shaft sleeve (12), a fixing sleeve (13), a first outer sleeve (141) and a second outer sleeve (142); among them, The second outer sleeve (142) is of an L-shaped structure. The first outer sleeve (141) and the second outer sleeve (142) are joined and located outside the shaft sleeve (12) to form an annular structure with a concave cross-section. The first outer sleeve (141), the second outer sleeve (142) and the shaft sleeve (12) enclose an annular cavity. The side of the first outer sleeve (141) away from the second outer sleeve (142) is fixedly connected to the connecting part (42); The shaft sleeve (12) is press-connected to the fan rotor through the compression sleeve (11); The moving ring (9) is fixedly connected to the shaft sleeve (12); and the shaft sleeve (12), the pressing sleeve (11) and the moving ring (9) rotate together with the fan rotor; The first outer sleeve (141) is connected to the shaft sleeve (12) through the internal comb tooth seal ring (7), and the internal comb tooth seal ring (7) is fixed on the first outer sleeve (141); The second outer sleeve (142) is connected to the pressing sleeve (11) through the external comb tooth seal ring (8), and the external comb tooth seal ring (8) is fixed on the second outer sleeve (142); The fixed sleeve (13) is of an L-shaped structure. The outer wall of the fixed sleeve (13) is fixedly connected to the inner wall of the second outer sleeve (142), and the stationary ring (10) is fixed on the inner wall of the fixed sleeve (13); Moreover, the moving ring (9) and the stationary ring (10) are sealingly connected through a sealing end face.
10. An anti-hair dryer, characterized in that, Comprising the sealing device according to any one of claims 1-9.