Packing type floating shaft seal

Abstract

The utility model discloses a packing type floating shaft seal which comprises a shaft seal base fixed to a fan shell. The packing sleeve is arranged on the shaft seal base and matched with the shaft seal base; the sealing assembly is arranged on the packing sleeve and used for being in contact with a shaft and achieving sealing; the packing pressing plate is arranged on the packing sleeve and used for deforming the sealing assembly, and the adjusting supporting lugs are arranged on the packing sleeve and the packing pressing plate and used for adjusting the packing pressing plate to press the sealing assembly. The sealing assembly has the advantages that shaft sealing is achieved in the mode that packing sealing and air sealing are combined, the photoelectric sensor is adopted for monitoring and feeding back the use condition in time, and the sealing assembly has the advantages of being simple in structure, convenient to install and maintain and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal ventilation equipment technical field, especially a kind of filler type floating shaft seal. BACKGROUND

[0002] Centrifugal ventilation equipment is the mechanical energy to improve gas pressure, then gas is delivered out, it is a kind of general mechanical equipment for air supply or air exhaust purpose, it is widely used in various trades at present.

[0003] At present, when the temperature of conveying medium of ventilation equipment increases, the fan shell expands due to heat, and the shaft seal moves up or down, the shaft and the shell have different expansion coefficients, so that the displacement difference caused by the shaft seal sealing component cannot be automatically compensated, which leads to the shaft and the shaft seal cannot continuously guarantee concentricity, and further leads to the aggravation of unilateral sealing material wear, increase of leakage and other unsafe factors, part of centrifugal ventilation equipment is in the core position of certain process, generally not allowed to stop for a long time, such as shaft seal structure complex replacement of wearing parts is more tedious, long time parking is easy to produce certain economic loss. SUMMARY

[0004] The utility model aims at the above-mentioned problems and defects of prior art, and provides a kind of filler type floating shaft seal to solve the above-mentioned problems.

[0005] The technical problem solved by the utility model can be realized by the following technical scheme:

[0006] A kind of filler type floating shaft seal, characterized in that, comprising:

[0007] Shaft seal base fixed on fan shell;

[0008] Filler sleeve is set on the shaft seal base and cooperates with the shaft seal base;

[0009] Sealing assembly is set on the filler sleeve and is used to contact with shaft and realize sealing;

[0010] Filler pressing plate is set on the filler sleeve and is used to generate deformation to the sealing assembly, and

[0011] Adjusting lug is set on the filler sleeve and the filler pressing plate and is used to adjust the filler pressing plate to the sealing assembly and be pressed tightly.

[0012] When using, shaft seal base is fixed on fan shell, under normal circumstances, the shaft on fan shell contacts with sealing assembly and forms seal, but due to the long time work of shaft, the sealing property of sealing assembly is loose, at this time, adjusting lug is screwed in to realize the pressing of filler pressing plate to sealing assembly, so that sealing assembly protrudes to the direction of shaft and contacts with shaft again and forms seal.

[0013] In one preferred embodiment of the present application, the packing sleeve comprises a sliding plate arranged on the shaft seal base and matched with the shaft seal base, and a shaft sleeve arranged on the sliding plate, the top and bottom of the sliding plate are provided with U-shaped notches.

[0014] In one preferred embodiment of the present application, the shaft sleeve is provided with an inflation hole connected with the quick connector.

[0015] In one preferred embodiment of the present application, the sealing assembly comprises a first packing ring, a second packing ring, a sealing ring and a third packing ring arranged on the sliding plate from left to right and located on the inner wall of the shaft sleeve.

[0016] In one preferred embodiment of the present application, the groove of the sealing ring is provided with an air hole, the air hole is used for the compressed air to enter the inner cavity of the sealing ring and form a gas seal between the shaft and the sealing ring after the shaft is contacted.

[0017] In one preferred embodiment of the present application, the adjusting lug comprises a first lug plate and a second lug plate arranged on the shaft sleeve and the packing pressing plate respectively, and an adjusting bolt threaded with the first lug plate and used for adjusting the pressing of the packing pressing plate.

[0018] In one preferred embodiment of the present application, the shaft seal base is provided with a shaft seal pressing plate used for limiting the axial movement of the packing sleeve, and the shaft seal base and the shaft seal pressing plate are detachably connected through a bolt assembly.

[0019] In one preferred embodiment of the present application, the inner diameter of the shaft seal pressing plate is larger than the inner diameter of the packing sleeve.

[0020] In one preferred embodiment of the present application, the shaft seal base is further provided with a pin hole, the pin hole is provided with a positioning pin matched with the U-shaped notch and used for limiting the circumferential rotation of the sliding plate.

[0021] In one preferred embodiment of the present application, the shaft seal pressing plate is provided with an M18 threaded hole corresponding to the position of the positioning pin, and the M18 threaded hole is provided with an optical sensor.

[0022] Due to the adoption of the above technical scheme, the sealing assembly of the present application adopts the combined mode of packing seal and gas seal to realize shaft sealing, and the optical sensor is used for monitoring and timely feeding the use condition, so that the present application has the characteristics of simple structure, convenient installation and maintenance, etc. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0024] Figure 1 The structure front view of an embodiment of the present application.

[0025] Figure 2 The structure side view of an embodiment of the present application.

[0026] Figure 3 The structure front view of an embodiment of the present application without shaft seal pressing plate.

[0027] Figure 4 The A-A sectional view of Figure 1

[0028] Figure 5 The local enlarged view of Figure 4

[0029] Figure 6 The B-B sectional view of Figure 1

[0030] Figure 7 The local enlarged view of Figure 6

[0031] Figure 8 The transverse sectional view of an embodiment of the present application.

[0032] Figure 9 The structure perspective view of the shaft seal base of an embodiment of the present application.

[0033] Figure 10 The structure perspective view of the shaft seal pressing plate of an embodiment of the present application.

[0034] Figure 11 The structure perspective view of an embodiment of the present application without shaft seal base and shaft seal pressing plate.

[0035] Figure 12 The structure perspective view of an embodiment of the present application.

[0036] ​​​​Reference signs: quick interface 10; shaft seal base 100; pin hole 101; positioning pin 102; shaft seal pressing plate 110; M18 threaded hole 111; photoelectric sensor 112; packing sleeve 200; sliding plate 210; shaft sleeve 220; U-shaped notch 211; inflation hole 221; sealing assembly 300; first packing 310; second packing 320; sealing ring 330; third packing 340; air hole 331; packing pressing plate 400; adjusting lug 500; first lug plate 510; second lug plate 520; adjusting bolt 530; threaded hole 511; through hole 521. DETAILED DESCRIPTION

[0037] Preferred embodiments of the present application will be described in greater detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it is understood that the present application can be embodied in various forms without being limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0038] The terms used in the present application are merely for the purpose of describing particular embodiments and are not intended to limit the present application. As used in the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or," as used herein, refer to and encompass any or all possible combinations of one or more of the associated listed items.

[0039] It should be understood that, although the terms "first," "second," "third," etc. can be employed in describing various information, such information should not be limited by these terms. These terms are only used to distinguish one piece of information from another. For example, a first item can also be termed a second item, and, similarly, a second item can also be termed a first item, without departing from the scope of the present application. Therefore, the features defined with "first," "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0040] Referring to Figures 1 to 12 The packing type floating seal shown in the drawing comprises a shaft seal base 100, a packing sleeve 200, a sealing assembly 300, a packing pressing plate 400, and an adjusting lug 500.

[0041] The shaft seal base 100 is fixed on the fan housing. In the present embodiment, the shaft seal base 100 is provided with a shaft seal pressing plate 110 for limiting the axial movement of the packing sleeve 200, and the shaft seal base 100 and the shaft seal pressing plate 110 are detachably connected through a screw assembly.

[0042] The packing sleeve 200 is arranged on the shaft seal base 100 and cooperates with the shaft seal base 100. The packing sleeve 200 in the embodiment comprises a sliding plate 210 arranged on the shaft seal base 100 and cooperating with the shaft seal base 100, and a shaft sleeve 220 arranged on the sliding plate 210. The top and bottom of the sliding plate 210 are provided with U-shaped notches 211. The shaft sleeve 220 is provided with an inflation hole 221 connected with the quick connector 10. When compressed air is configured, the compressed air is introduced from the inflation hole 221 after being treated by a filter, a pressure reducing valve and an oil atomizer.

[0043] The sealing assembly 300 is arranged on the packing sleeve 200 and cooperates with the shaft to achieve sealing. The sealing assembly 300 in the embodiment comprises a first packing packing 310, a second packing packing 320, a sealing ring 330 and a third packing packing 340 arranged on the sliding plate 210 in sequence from left to right and located on the inner wall of the shaft sleeve 220. The concave groove of the sealing ring 330 is provided with an air hole 331. The air hole 331 is used for the compressed air to enter the inner cavity of the sealing ring 330 and form a gas seal between the shaft and the sealing ring after the shaft contacts the sealing ring. Therefore, the first packing packing 310, the second packing packing 320, the sealing ring 330 and the third packing packing 340 in the embodiment contact the shaft and form a first seal, and the compressed air enters the inner cavity of the sealing ring 330 and forms a gas seal between the shaft and the sealing ring after the shaft contacts the sealing ring, thereby achieving a double sealing effect.

[0044] The packing pressing plate 400 is arranged on the packing sleeve 200 and is used to deform the sealing assembly 300. The packing pressing plate 400 in the embodiment is arranged on the inner wall of the shaft sleeve 220 of the packing sleeve 200 and contacts the third packing packing 340.

[0045] The adjusting lug 500 is arranged on the packing sleeve 200 and the packing pressing plate 400 and is used to adjust the pressing of the packing pressing plate 400 to the sealing assembly 300, and the adjusting lug 500 in the embodiment comprises a first lug plate 510 and a second lug plate 520 arranged on the shaft sleeve 220 and the packing pressing plate 400 respectively and an adjusting bolt 530 threaded with the first lug plate 510 and used to adjust the pressing of the packing pressing plate 400. Specifically, the first lug plate 510 is provided with a threaded hole 511, and the second lug plate 520 is provided with a through hole 521. When the shaft works for a long time, the sealing performance of the first packing packing 310, the second packing packing 320, the sealing ring 330 and the third packing packing 340 will be loosened, at this time, the adjusting bolt 530 is rotated manually to move on the threaded hole 511 of the first lug plate 510 to drive the packing pressing plate 400 to press downward, when the first packing packing 310, the second packing packing 320, the sealing ring 330 and the third packing packing 340 are pressed, the first packing packing 310, the second packing packing 320, the sealing ring 330 and the third packing packing 340 will protrude to the shaft direction to contact the shaft and form a seal.

[0046] The shaft seal base 100 is further provided with a pin hole 101, and the pin hole 101 is provided with a positioning pin 102 matched with the U-shaped notch 211 and used to limit the circumferential rotation of the sliding plate 220.

[0047] The shaft seal pressing plate 110 is provided with an M18 threaded hole 111 corresponding to the position of the positioning pin 102, and the M18 threaded hole 111 is provided with an optical sensor 112. The inner diameter of the shaft seal pressing plate 110 in the embodiment is greater than the inner diameter of the packing sleeve 200. Specifically, the positioning pin 102 is provided with a groove. The working principle of the optical sensor 112 is as follows: first, the optical sensor 112 is aligned with the groove position on the positioning pin 102, and under normal circumstances, the shaft is in contact and friction with the sealing assembly 300, and due to the existence of the positioning pin 102, the U-shaped notch 211 at the top and bottom of the sliding plate 210 is clamped on the positioning pin and will not rotate with the shaft, when the working condition of the shaft is very poor (the shaft is heated or expanded), the friction force between the shaft and the sealing assembly will increase, and when the friction force increases to a certain extent, the shaft will have a tendency to rotate the sealing assembly, so as to drive the sliding plate 210 to cut off or damage the positioning pin 102 and produce displacement, at this time, the optical sensor 112 will feedback information in time and alarm.

[0048] The working principle of the utility model is as follows:

[0049] In use, the shaft seal base 100 is fixed on the fan shell, and normally the shaft on the fan shell is in contact with the sealing assembly 300 and forms a seal, but due to long-term work of the shaft, the sealing of the first packing ring 310, the second packing ring 320, the sealing ring 330 and the third packing ring 340 will be loose, at this time, the adjusting bolt 530 is manually rotated to move the adjusting bolt 530 on the threaded hole 511 of the first ear plate 510 to drive the packing plate 400 to press down, when the first packing ring 310, the second packing ring 320, the sealing ring 330 and the third packing ring 340 are pressed, the first packing ring 310, the second packing ring 320, the sealing ring 330 and the third packing ring 340 are deformed and protrude towards the shaft to form a seal with the shaft.

[0050] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the application unless otherwise specified. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship for the convenience of description. The technology, methods and equipment known to those skilled in the related art can not be discussed in detail, but under appropriate circumstances, the technology, methods and equipment should be regarded as part of the authorized description. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0051] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and in the absence of contrary description, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0052] For purposes of the description hereinafter, spatial

[0053] In addition, it should be noted that the use of the terms "first", "second", etc., to describe a component having a defined property is only intended to distinguish between that component and another component having a different defined property, and is not otherwise intended to limit the scope of the present application unless otherwise indicated. Thus, use of the term "first" to describe a component is intended to connote that the component so qualified is not necessarily described first, but is intended to serve its qualification purpose in the context of the specific claim.

[0054] The preferred embodiments of the present application have been described above with the intent to enable those skilled in the art to make and use it. Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Accordingly, the true scope of the present application is defined solely by the metes and bounds of the following claims.

Claims

1. A packing-type floating shaft seal, characterized in that, include: Shaft seal base fixed to the fan casing; A packing sleeve disposed on and cooperating with the shaft seal base; A sealing assembly disposed on the packing sleeve and used to contact the shaft and achieve a seal; A packing pressure plate disposed on the packing sleeve and used to deform the sealing assembly, and Adjusting lugs are provided on the packing sleeve and the packing pressure plate and are used to adjust the packing pressure plate to press the sealing assembly.

2. The packing-type floating shaft seal according to claim 1, characterized in that, The packing sleeve includes a slide plate disposed on and cooperating with the shaft seal base and a shaft sleeve disposed on the slide plate, wherein the top and bottom of the slide plate are provided with U-shaped grooves.

3. A packing-type floating shaft seal according to claim 2, characterized in that, The bushing has an inflation hole that connects to a quick-connect interface.

4. A packing-type floating shaft seal according to claim 2, characterized in that, The sealing assembly includes, from left to right, a first packing packing, a second packing packing, a sealing ring, and a third packing packing, which are sequentially arranged on the slide plate and located on the inner wall of the bushing.

5. A packing-type floating shaft seal according to claim 4, characterized in that, The sealing ring has an air hole in its groove. The air hole allows compressed air to enter the internal cavity of the sealing ring and contact the shaft, thus forming an air seal between the shaft and the sealing ring.

6. A packing-type floating shaft seal according to claim 2, characterized in that, The adjusting lug includes a first lug and a second lug respectively disposed on the bushing and the packing pressure plate, and an adjusting bolt threaded to the first lug and used to adjust the downward pressure of the packing pressure plate.

7. A packing-type floating shaft seal according to claim 2, characterized in that, The shaft seal base is provided with a shaft seal pressure plate for restricting the axial movement of the packing sleeve. The shaft seal base and the shaft seal pressure plate are detachably connected by a bolt assembly.

8. A packing-type floating shaft seal according to claim 7, characterized in that, The inner diameter of the shaft seal pressure plate is larger than the inner diameter of the packing sleeve.

9. A packing-type floating shaft seal according to claim 7, characterized in that, The shaft seal base is also provided with a pin hole, and the pin hole is provided with a positioning pin that cooperates with the U-shaped groove and is used to restrict the slide plate from rotating in a circumferential direction.

10. A packing-type floating shaft seal according to claim 9, characterized in that, The shaft seal pressure plate is provided with an M18 threaded hole corresponding to the position of the positioning pin, and a photoelectric sensor is provided on the M18 threaded hole.

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