CN215980020U - Sealing device and fan - Google Patents

Abstract

The application discloses a sealing device and a fan, and relates to the technical field of fan sealing, wherein the sealing device comprises a supporting piece, a rotating part and a sealing ring, the supporting piece is provided with an opening, the rotating part is rotatably arranged at the opening and comprises an annular flange, the axis of the annular flange is collinear with the rotating axis of the rotating part, the sealing ring is fixedly connected with the supporting piece, the sealing ring comprises an annular sealing part, the annular sealing part is sleeved on the periphery of the annular flange, and a gap is formed between the inner wall surface of the annular sealing part and the periphery of the annular flange; the internal face of annular seal portion includes first annular spigot surface, along the axial of annular seal portion, and the diameter of first annular spigot surface increases progressively, and annular seal portion is equipped with first terminal surface and second terminal surface along the axis direction back on the back, and the great one end of first annular spigot surface diameter extends to first terminal surface. The scheme can solve the problems of deformation of the sealing ring and clamping stagnation of the rotating part caused by accumulation of dirty dirt at the gap.

Description

Sealing device and fan

Technical Field

The application belongs to the technical field of fan sealing, and particularly relates to a sealing device and a fan.

Background

In the field of industrial plants, labyrinth seals are used in many cases, which have a plurality of small chambers which are tortuous in order to reduce leakage.

In order to ensure the pressure difference environment of the existing industrial fan, a sealing ring of the fan is also sealed in a labyrinth manner. Specifically, as shown in fig. 1 and 2, the sealing ring 300 is fixedly mounted to the casing 610 of the fan 600, and the impeller 620 of the fan 600 is fixedly connected to the main shaft 630, so that the impeller 620 rotates along with the main shaft 630. In this state, the seal ring 300 is just fitted around the outer periphery of the impeller 620, but a small gap 400 exists between the seal ring 300 and the impeller 620. Because the inner side of the sealing ring 300 is provided with a plurality of annular sealing teeth which are arranged in sequence, and a groove is formed between adjacent teeth, a series of closure gaps and expansion cavities are formed between the groove and the impeller 620, and the sealed medium generates a throttling effect when passing through the gap 400, so that the purpose of leakage resistance is achieved, and sealing is realized.

However, when the impeller operates to cause a pressure difference, dirt and dust can enter the inside of the fan along with the suction of the fan, and the dirt and dust is distributed at each part inside the fan under the action of centrifugal force and naturally falls into the groove of the sealing ring through a small gap between the sealing ring and the impeller. When the fan stopped rotating, the bottom of radial entering slot of sealing washer can be followed to the filth under the action of gravity, and the time is piled up repeatedly for a long time, and final accumulational filth is full of the slot, can contact with rusty impeller fitting surface, produces great stiction, causes the jamming of impeller, influences the normal operating of fan and the life of fan.

SUMMERY OF THE UTILITY MODEL

The purpose of the embodiment of the application is to provide a sealing device and fan, can solve in the correlation technique dirty filth easily pile up in the clearance between sealing washer and impeller, and then lead to the sealing washer to warp and cause the problem of impeller jamming.

In a first aspect, an embodiment of the present application provides a sealing device, including:

a support provided with an opening;

the rotating component is rotatably arranged at the opening and comprises an annular flange, and the axis of the annular flange is collinear with the rotating axis of the rotating component;

the sealing ring is fixedly connected with the supporting piece and comprises an annular sealing part, the annular sealing part is sleeved on the periphery of the annular flange, and a gap is formed between the inner wall surface of the annular sealing part and the periphery of the annular flange; the inner wall surface of the annular sealing portion comprises a first annular guide surface, the diameter of the first annular guide surface is increased progressively along the axial direction of the annular sealing portion, a first end surface and a second end surface are arranged on the annular sealing portion in a back-to-back mode along the axial direction, and the larger end of the first annular guide surface extends to the first end surface.

In a second aspect, an embodiment of the present application further provides a fan, including the above-mentioned sealing device.

In the embodiment of the application, the rotating part generates pressure difference while running, and under the action of the pressure difference and centrifugal force, external dirty dirt can pass through the opening along with wind. Because the rotating part rotates relative to the sealing ring and a gap exists between the rotating part and the sealing ring, when dirt passes through the opening, a part of tiny dirt can enter the gap under the action of centrifugal force. Due to the guiding effect of the first annular guide surface, the part of small dirt can move to the first end surface of the sealing ring along the first annular guide surface, so that the dirt is discharged out of the gap, the dirt is prevented from being accumulated in the gap, and the problems of deformation of the sealing ring and clamping of a rotating part caused by accumulation of the dirt are avoided; moreover, even if some dirt remains in the gap, the dirt is subjected to centrifugal force and moves out of the gap along the first annular guide surface when the rotating member rotates.

Drawings

FIG. 1 is a schematic view of a wind turbine disclosed in an embodiment of the present application;

FIG. 2 is a cross-sectional view of the interior of FIG. 1 at A;

FIG. 3 is a cross-sectional view of a sealing device disclosed in an embodiment of the present application;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is a schematic cross-sectional view of a seal ring according to the first embodiment of the present disclosure along an axial line;

FIG. 6 is a schematic cross-sectional view of a seal ring according to a second embodiment of the present disclosure along an axial line;

FIG. 7 is a schematic cross-sectional view of a seal ring according to a third embodiment of the present disclosure, taken along an axial line;

FIG. 8 is a schematic cross-sectional view of a seal ring according to a fourth embodiment of the present disclosure, taken along an axial line;

FIG. 9 is a schematic cross-sectional view of a seal ring according to a fifth embodiment of the present disclosure along an axial line;

FIG. 10 is a schematic axial cross-sectional view of a seal ring according to a sixth embodiment of the present disclosure;

fig. 11 is a schematic cross-sectional view of a seal ring according to a seventh embodiment of the present invention, taken along an axial direction.

Description of reference numerals:

100-a support;

200-a rotating member; 210-annular flange;

300-sealing ring; 310-annular seal; 311-a first annular guide surface; 312 — a second annular guide surface; 313-circular engagement face; 320-a mounting portion; 321-mounting holes;

400-clearance;

510-a first end face; 520-a second end face;

600-a fan; 610-a housing; 611-an air inlet; 620-impeller; 630-main axis.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one.

The sealing device and the fan provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

Referring to fig. 3 to 11, a sealing device disclosed in an embodiment of the present application includes a supporting member 100, a rotating member 200, and a sealing ring 300, where the sealing ring 300 is a core component of the sealing device and mainly plays a role in sealing; the support 100 and the rotating member 200 together provide a suitable environment for the seal ring 300.

The support 100 is provided with an opening at which the rotating member 200 is rotatably provided, and the rotating member 200 forms a negative pressure at the opening with the rotating member 200 in a rotated state, thereby sucking air to the opening and passing the air through the rotating member 200. Further, as shown in fig. 3, the rotating member 200 includes an annular flange 210, and an axis of the annular flange 210 is collinear with an axis of rotation of the rotating member 200. Specifically, the rotating member 200 may be connected to a rotary power source, such as a motor, and the rotating member 200 is driven to rotate by a power output shaft of the motor.

As shown in fig. 3 and 4, the sealing ring 300 is fixedly connected to the supporting member 100, wherein the sealing ring 300 and the supporting member 100 may be fixedly connected by welding, bonding, or the like, or may be fixedly connected by a bolt, but the fixing connection method is not limited thereto. The seal ring 300 includes an annular seal portion 310, the annular seal portion 310 is fitted around the outer periphery of the annular flange 210 of the rotary member 200, and a gap 400 is provided between the inner wall surface of the annular seal portion 310 and the outer periphery of the annular flange 210.

In this way, the rotating member 200 generates a pressure difference during operation, and the external micro-dirt can pass through the opening and the rotating member 200 with the wind under the action of the pressure difference and the centrifugal force. Since the rotating member 200 rotates relative to the seal ring 300 and there is a gap 400 between the seal ring 300 and the annular flange 210, when dirt passes through the opening, a part of the minute dirt enters the gap 400 by centrifugal force.

In the present embodiment, as shown in fig. 5 to 11, the inner wall surface of the annular sealing portion 310 includes a first annular guiding surface 311, the diameter of the first annular guiding surface 311 increases in the axial direction of the annular sealing portion 310, the annular sealing portion 310 is provided with a first end surface 510 and a second end surface 520 in the axial direction, the end with the larger diameter of the first annular guiding surface 311 extends to the first end surface 510, that is, the width of the gap 400 gradually increases in the axial direction of the annular sealing portion 310. Specifically, the diameter of the first annular guide surface 311 may be uniformly increased or may not be uniformly increased in the axial direction of the annular seal portion 310.

Due to the guiding effect of the first annular guiding surface 311, the dirt entering the gap 400 can move to the first end surface 510 of the sealing ring 300 along the first annular guiding surface 311, so that the dirt is discharged out of the gap 400, the dirt is prevented from being accumulated in the gap 400, and the problem that the sealing ring 300 is deformed and the rotating part 200 is stuck due to accumulation of the dirt is avoided.

Alternatively, the sealing device may be applied to the blower 600, as shown in fig. 1, in which case the support 100 is a casing 610 of the blower 600, the opening is an air inlet 611, and the rotating member 200 is an impeller 620 of the blower 600; of course, the sealing device is not limited to be applied to the fan, and can also be applied to other air supply equipment. Therefore, the sealing device avoids the problem that the impeller 620 is stuck in the rotating process.

In the present embodiment, as shown in fig. 3, an annular seal portion 310 is located between the rotating member 200 and the support member 100, and is provided at the edge of the opening, thereby closing the annular opening between the rotating member 200 and the support member 100.

In an alternative embodiment, as shown in fig. 5 and 6, the end of the first annular guide surface 311 with the smaller diameter extends to the second end surface 520, that is, the first annular guide surface 311 constitutes the inner wall surface of the annular sealing portion 310. Specifically, as shown in fig. 5, the end of the first annular guide surface 311 with a larger diameter may extend to the first end surface 510, but not to the outer circumferential position of the annular sealing portion 310; as shown in fig. 6, the end of the first annular guide surface 311 having a larger diameter may extend to the first end surface 510 and to the outer periphery of the annular seal portion 310, in which case, only the second end surface 520 may be provided corresponding to the annular seal portion 310.

In this way, the first annular guide surface 311 forms the entire inner wall surface of the annular sealing portion 310, so as to guide the dirt in the gap 400 to the maximum extent, and the dirt in the gap 400 is guided to the first end surface 510 of the annular sealing portion 310 by the guiding action of the first annular guide surface 311, so that the dirt in the gap 400 is discharged to the outside of the gap 400.

In the present embodiment, the cross section of the first annular guide surface 311 at any position along the axial direction of the annular sealing portion 310 is a beveled edge or an arc-shaped edge. That is, the diameter of the first annular guide surface 311 may be uniformly increased or may not be uniformly increased in the axial direction of the annular seal portion 310. Specifically, in the case where the diameter of the first annular guide surface 311 is uniformly increased, the cross section of the first annular guide surface 311 at any position along the axial direction of the annular seal portion 310 is a sloping edge; in the case where the diameter of the first annular guide surface 311 is not uniformly increased, the cross section of the first annular guide surface 311 at any position along the axial direction of the annular sealing portion 310 may be an arc-shaped edge, that is, in the cross section parallel to the axial direction of the annular sealing portion 310, the cross section formed by the first annular guide surface 311 may be an arc-shaped edge, and of course, the cross section may also be an irregular arc-shaped edge formed by multiple arc-shaped edges of different diameters.

In this way, the dirt in the gap 400 can be guided regardless of whether the axial cross-sectional shape is a beveled or arcuate edge.

Alternatively, the cross section of the first annular guide surface 311 at any position along the axial direction of the annular sealing portion 310 is an arc-shaped edge, and the arc-shaped edge is convex toward the axial direction. In other embodiments, the arcuate edge may also be convex away from the axis.

With such an arrangement, on the premise of ensuring the guiding effect of the first annular guiding surface 311, the cutting material of the sealing ring 300 is less, and the material utilization rate is high.

In a further aspect, as shown in fig. 7 to 11, the inner wall surface of the annular sealing portion 310 includes a second annular guide surface 312, the diameter of the second annular guide surface 312 increases in the axial direction of the annular sealing portion 310, and the larger diameter end of the second annular guide surface 312 extends to the second end surface 520. Wherein the diameter increasing direction of the second annular guide surface 312 is opposite to the diameter increasing direction of the first annular guide surface 311. Specifically, the diameter of the second annular guide surface 312 may be uniformly increased or may not be uniformly increased along the axial direction of the annular sealing portion 310.

Then, a part of the dirt in the gap 400 moves to the first end surface 510 of the seal ring 300 along the first annular guide surface 311, and the part of the dirt is discharged out of the gap 400; another part of the dirty dirt in the gap 400 moves to the second end surface 520 of the seal ring 300 along the second annular guide surface 312, and the part of the dirty dirt is also discharged out of the gap 400, so that the two parts of the dirty dirt can be simultaneously discharged, and the discharge efficiency is improved.

Alternatively, as shown in fig. 7-8 and 10-11, the first annular guide surface 311 is connected with the second annular guide surface 312, that is, the end of the first annular guide surface 311 with a smaller diameter is connected with the end of the second annular guide surface 312 with a smaller diameter. In the present embodiment, the minimum diameter of the first annular guide surface 311 is equal to the minimum diameter of the second annular guide surface 312. Of course, the first annular guide surface 311 and the second annular guide surface 312 may not be directly connected.

In this way, during operation, all the dirt in the gap 400 is divided into two parts, which are respectively discharged from the first annular guide surface 311 and the second annular guide surface 312 to the outside of the gap 400, so as to prevent the dirt from accumulating in the gap 400 to a greater extent.

In an alternative embodiment, as shown in fig. 9, the inner wall surface of the annular sealing portion 310 includes an annular engaging surface 313, the annular engaging surface 313 is disposed between the first annular guide surface 311 and the second annular guide surface 312, and one end of the annular engaging surface 313 is connected to the first annular guide surface 311 and the other end of the annular engaging surface 313 is connected to the second annular guide surface 312, that is, one end of the annular engaging surface 313 is connected to the end of the first annular guide surface 311 having a smaller diameter and the other end of the annular engaging surface 313 is connected to the end of the second annular guide surface 312 having a smaller diameter. Specifically, the diameter of the annular engagement surface 313 is constant, and the diameter of the annular engagement surface 313 is equal to the minimum diameter of the first annular guide surface 311, and also equal to the minimum diameter of the second annular guide surface 312.

With such arrangement, the annular engagement surface 313 ensures the basic sealing effect of the sealing ring 300, and the first annular guide surface 311 and the second annular guide surface 312 are utilized to respectively discharge two parts of dirt in the gap 400 to the outside of the gap 400, so as to avoid accumulation of the dirt; moreover, the structure has relatively low processing cost, small processing difficulty and less cutting materials.

In the present embodiment, the cross section of the first annular guide surface 311 at any position along the axial direction of the annular seal portion 310 has a first shape, the cross section of the second annular guide surface 312 at any position has a second shape, and both the first shape and the second shape are oblique edges or arc-shaped edges. That is, the diameter of the first annular guide surface 311 and the diameter of the second annular guide surface 312 may be uniformly increased or may be non-uniformly increased in the axial direction of the annular seal portion 310. Specifically, in the case where the diameters of the first annular guide surface 311 and the second annular guide surface 312 are uniformly increased, both the first shape and the second shape are oblique sides, as shown in fig. 8 to 10; in the case where the diameter of the first annular guide surface 311 and the diameter of the second annular guide surface 312 are not uniformly increased, both the first shape and the second shape may be arc-shaped sides, as shown in fig. 7 and 11, but the cross-sectional shape may be an irregular arc-shaped side formed by a plurality of arc-shaped sides of different diameters.

In this way, the first annular guide surface 311 and the second annular guide surface 312 can guide the dirt in the gap 400 regardless of whether the axial cross-sectional shape is a hypotenuse or an arc-shaped edge.

In other embodiments, the first shape may be different from the second shape, such as the first shape being a beveled edge and the second shape being a curved edge, or the first shape being a curved edge and the second shape being a beveled edge.

Alternatively, in the axial direction of the annular seal portion 310, the first shape and the second shape are both arc-shaped sides, and the arc-shaped sides are convex in a direction close to the axial line. In other embodiments, the arcuate edge may also be convex away from the axis.

So set up, under the prerequisite of guaranteeing the guide effect of first annular guiding surface 311 and second annular guiding surface 312 for the cutting material of sealing washer 300 is less, and material utilization is higher.

In a further embodiment, the sealing ring 300 further includes a mounting portion 320, the mounting portion 320 is disposed on an outer circumference of the annular sealing portion 310, and the mounting portion 320 is fixedly connected to the supporting member 100. In the present embodiment, the mounting portion 320 is of unitary construction with the annular sealing portion 310. Specifically, as shown in fig. 3, the mounting portion 320 is connected to an inner sidewall of the supporting member 100, and the mounting portion 320 may be fixedly connected to the supporting member 100 by welding, bonding, or the like, or may be fixedly connected by a bolt, but the fixing connection method is not limited thereto.

Optionally, the mounting portion 320 is an annular structure, the mounting portion 320 is provided with a plurality of mounting holes 321, and the mounting holes 321 are uniformly distributed on the annular structure along the circumferential direction of the axis. Of course, the mounting portion 320 may have other shapes. When the sealing ring 300 is coupled to the support 100, the fastening member is inserted through the mounting hole 321 and screwed to the support 100. Specifically, the fastening member may be a screw, the mounting hole 321 is a through hole, and the support 100 is provided with a threaded hole, and the screw penetrates through the through hole and is threadedly engaged with the threaded hole.

In other embodiments, the fastening member may be a bolt and a nut, the mounting hole 321 is a through hole, the support 100 is also provided with a through hole, the bolt sequentially penetrates through the mounting hole 321 and the through hole of the support 100, and is tightened by the nut, so as to achieve the fixed connection between the sealing ring 300 and the support 100.

The present application further discloses a fan 600, as shown in fig. 1, including the sealing device in the above embodiments, wherein the supporting member 100 is a casing 610 of the fan 600, and the rotating member 200 is an impeller 620 of the fan 600. In addition to the sealing means, the fan may also include other components such as a main shaft 630.

In the present embodiment, the casing 610 is a housing of the blower 600, and is used for protecting various components in the casing 610; the impeller 620 is a core part in the fan 600, the impeller 620 is mainly formed by riveting or welding a wheel disc, a wheel cover and blades, and the impeller 620 mainly functions to improve the pressure and the speed of gas passing through the impeller.

Wherein the casing 610 is provided with an air inlet 611, i.e. the opening mentioned above, and the impeller 620 is located in the casing 610 and rotatably disposed at the air inlet 611. Specifically, a main shaft 630 is disposed in the casing 610, the impeller 620 is sleeved on the main shaft 630 and is fixedly connected with the main shaft 630, and the main shaft 630 is driven by a rotary power source to rotate. Thus, under the driving action of the rotary power source, the main shaft 630 drives the impeller 620 to rotate synchronously, so that the impeller 620 rotates at the air inlet 611, a pressure difference is formed, and air outside the casing 610 is sucked into the casing 610.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (11)

1. A seal assembly, comprising:

a support (100), the support (100) being provided with an opening;

the rotating component (200) is rotatably arranged at the opening, the rotating component (200) comprises an annular flange (210), and the axis of the annular flange (210) is collinear with the rotating axis of the rotating component (200);

the sealing ring (300) is fixedly connected with the support piece (100), the sealing ring (300) comprises an annular sealing part (310), the annular sealing part (310) is sleeved on the periphery of the annular flange (210), and a gap (400) is formed between the inner wall surface of the annular sealing part (310) and the periphery of the annular flange (210); the inner wall surface of the annular sealing portion (310) comprises a first annular guide surface (311), the diameter of the first annular guide surface (311) is increased progressively along the axial direction of the annular sealing portion (310), a first end surface (510) and a second end surface (520) are arranged on the annular sealing portion (310) along the axial direction in a back-to-back mode, and the larger end of the diameter of the first annular guide surface (311) extends to the first end surface (510).

2. A sealing arrangement according to claim 1, characterized in that the end of the first annular guide surface (311) having the smaller diameter extends to the second end surface (520).

3. The sealing arrangement as claimed in claim 1, characterized in that the inner wall surface of the annular sealing portion (310) comprises a second annular guide surface (312), the diameter of the second annular guide surface (312) increasing in the axial direction of the annular sealing portion (310), and the end of the second annular guide surface (312) having the larger diameter extends to the second end surface (520).

4. A sealing arrangement according to claim 3, characterized in that the first annular guide surface (311) is connected with the second annular guide surface (312).

5. A sealing arrangement according to claim 3, wherein the inner wall surface of the annular sealing portion (310) further comprises an annular engagement surface (313), the annular engagement surface (313) being provided between the first annular guide surface (311) and the second annular guide surface (312), and wherein one end of the annular engagement surface (313) is connected to the first annular guide surface (311) and the other end of the annular engagement surface (313) is connected to the second annular guide surface (312).

6. A sealing arrangement according to claim 3, characterized in that the cross-section of the first annular guiding surface (311) at any location in the axial direction of the annular sealing portion (310) is of a first shape and the cross-section of the second annular guiding surface (312) at any location is of a second shape, both the first shape and the second shape being bevelled or curved edges.

7. The sealing device according to claim 1, wherein the cross-section of the first annular guide surface (311) at any position along the axial direction of the annular sealing portion (310) is a beveled edge or an arc-shaped edge.

8. A sealing arrangement according to claim 6 or 7, characterized in that the curved edge is convex in the axial direction close to the annular sealing portion (310).

9. The sealing device according to claim 1, wherein the sealing ring (300) further comprises a mounting portion (320), the mounting portion (320) is disposed at an outer periphery of the annular sealing portion (310), and the mounting portion (320) is fixedly connected to the support member (100).

10. The sealing device according to claim 9, wherein the mounting portion (320) is a ring structure, and the mounting portion (320) is provided with a mounting hole (321), and a fastener penetrates through the mounting hole (321) and is screwed to the supporting member (100) to achieve the fixed connection between the sealing ring (300) and the supporting member (100).

11. A fan comprising a sealing device according to any of claims 1-10, wherein the support member (100) is a casing (610) and the rotating member (200) is an impeller (620).

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