Shaft end sealing structure with multiple sealing combinations

Abstract

The utility model belongs to the technical field of shaft end sealing, and relates to a multi-seal combined shaft end sealing structure which comprises a wear-resistant bushing mounted on a shaft and a sealing seat sleeved on the outer side of the wear-resistant bushing through a sealing block, the sealing block is mounted on the wear-resistant bushing, the sealing seat is sleeved on the sealing block, and the wear-resistant bushing is sleeved on the sealing seat. The sealing block is made of polytetrafluoroethylene, one end of the sealing seat is in sealing connection with the wall plate through a first sealing ring, the other end of the sealing seat is in sealing connection with a sealing seat end cover arranged on the abrasion-resistant lining in a sleeving mode through a second sealing ring, two oil seals are installed between the sealing seat and the abrasion-resistant lining, and the two oil seals are both split sealing type oil seals. Openings of the two oil seals face the machine body, the two oil seals are separated through a spacer bush, and the spacer bush is communicated with an air inlet hole in the sealing seat. The sealing device has a good sealing effect, external dust can be prevented from entering equipment, and internal material dust can also be prevented from leaking out of the equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of shaft end seals, and in particular relates to a shaft end seal structure with multiple seal combinations. Background Art

[0002] In the modern feed industry, the existing shaft end sealing structure uses sealing packing, which plays a certain role in preventing external dust from entering the equipment and material dust from overflowing inside the equipment, but cannot better prevent external dust from entering the equipment and material dust from overflowing inside the equipment; at the same time, it has disadvantages such as easy wear, single sealing structure, no compensation, poor sealing effect, easy leakage, and short life. Utility Model Content

[0003] The purpose of the utility model is to solve the defects and deficiencies in the prior art and to design a shaft end sealing structure with a multiple sealing combination that can prevent external dust from entering and internal material dust from leaking.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a shaft end sealing structure with a multiple sealing combination, including a wear-resistant bushing installed on the shaft, and a sealing seat mounted on the outside of the wear-resistant bushing through a sealing block, one end of the sealing seat is sealed with the wall panel, and the other end is sealed with the sealing seat end cover mounted on the wear-resistant bushing, and two oil seals are installed between the sealing seat and the wear-resistant bushing, and the two oil seals are separated by a spacer, and the spacer is connected to the air inlet on the sealing seat.

[0005] Preferably, the sealing block is mounted on a wear-resistant bushing, the sealing seat sleeve is arranged on the sealing block, and the sealing block is made of polytetrafluoroethylene.

[0006] Preferably, both ends of the sealing seat are sealedly connected to the wall panel and the sealing seat end cover through a first sealing ring and a second sealing ring respectively, and the sealing seat is fixedly connected to the wall panel and the sealing seat end cover through bolts.

[0007] Preferably, the two oil seals are both split-seal oil seals, and the openings of the two oil seals are both facing the machine body.

[0008] Preferably, the spacer is provided with a circle of air inlet grooves and a circle of air inlet holes, and the air inlet grooves are communicated with the air inlet holes on the sealing seat.

[0009] Preferably, an air inlet joint is installed in the air inlet, and the air inlet joint is connected to an external air pipe.

[0010] After adopting the above technical solution, the shaft end sealing structure with multiple sealing combinations provided by the utility model has the following beneficial effects:

[0011] The utility model can ensure the sealing between the sealing seat and the wall panel through the design of the sealing block and the first sealing ring; the design of the oil seal opening facing the body can prevent material leakage and achieve zero leakage; the split-sealed oil seal design can facilitate installation and disassembly, and the oil seal can be replaced by simply removing the bolts on the sealing seat end cover and removing the sealing seat end cover; the design of the sealing seat end cover can ensure the sealing connection with the sealing seat while pressing the oil seal to prevent the oil seal from moving; the design of the spacer sleeve connected to the air inlet hole can allow compressed gas to enter the spacer sleeve and fill the space between the oil seals to achieve an isolation effect, so that the material inside the machine body and the dust outside the machine body have zero contact. Therefore, the utility model has a good sealing effect, which can prevent external dust from entering the equipment and prevent internal material dust from leaking out of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the shaft installation of a shaft end sealing structure with multiple sealing combinations according to the present invention;

[0013] Figure 2 This is a cross-sectional view of a shaft end sealing structure with multiple sealing combinations according to the present invention;

[0014] Figure 3 for Figure 2 side view.

[0015] Among them: first sealing ring 1, wear-resistant bushing 2, sealing block 3, sealing seat 4, air inlet joint 5, spacer 6, sealing seat end cover 7, oil seal 8, second sealing ring 12, shaft 13, wall panel 14. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments described are merely a portion of the embodiments of the present invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and in no way limits the present invention, its application, or use. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0017] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0018] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0019] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0020] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0021] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0022] The utility model discloses a shaft end sealing structure with multiple sealing combinations, such as Figure 1-3 As shown, it includes a wear-resistant bushing 2 installed on the shaft 13, and a sealing seat 4 sleeved on the outside of the wear-resistant bushing 2 through a sealing block 3, the sealing block 3 is installed on the wear-resistant bushing 2, the sealing seat 4 is sleeved on the sealing block 3, and the sealing block 3 is made of polytetrafluoroethylene, one end of the sealing seat 4 is sealed with the wall panel 14, and the other end is sealed with the sealing seat end cover 7 sleeved on the wear-resistant bushing 2. Specifically, the two ends of the sealing seat 4 are sealed with the wall panel 14 and the sealing seat end cover 7 through the first sealing ring 1 and the second sealing ring 12 respectively, and the sealing seat 4 is fixed to the wall panel 14 and the sealing seat end cover 7 by bolts.

[0023] Two oil seals 8 are installed between the sealing seat 4 and the wear-resistant bushing 2. Both oil seals 8 are split-sealed oil seals, which are easy to install and disassemble. The oil seal can be replaced by simply removing the bolts on the sealing seat end cover and removing the sealing seat end cover. The openings of the two oil seals 8 are both facing the direction of the machine body to prevent material leakage and achieve zero leakage. At the same time, the sealing connection between the sealing seat end cover 7 and the sealing seat 4 can also play a role in tightening the oil seal and preventing the oil seal from moving.

[0024] The two oil seals 8 are separated by a spacer 6, and the spacer 6 is connected to the air inlet hole on the sealing seat 4. Specifically, the spacer 6 is provided with a circle of air inlet grooves and a circle of air inlet holes, and the air inlet grooves are connected to the air inlet hole on the sealing seat 4. An air inlet hole joint 5 is installed in the air inlet hole, and the air inlet hole joint 5 is connected to the external air pipe, so that compressed gas can enter the spacer 6 and fill the space between the oil seals 8, thereby achieving an isolation effect, so that the material inside the body and the dust outside the body have zero contact.

[0025] In summary, the shaft end sealing structure with multiple sealing combinations provided by the present invention has a good sealing effect, which can prevent external dust from entering the equipment and prevent internal material dust from leaking out of the equipment.

[0026] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A shaft end sealing structure with multiple seal combinations, characterized by: The invention comprises a wear-resistant bushing (2) mounted on a shaft (13), and a sealing seat (4) sleeved on the outside of the wear-resistant bushing (2) through a sealing block (3); one end of the sealing seat (4) is sealedly connected to a wall panel (14) through a first sealing ring (1), and the other end is sealedly connected to a sealing seat end cover (7) sleeved on the wear-resistant bushing (2) through a second sealing ring (12); and two oil seals (8) are installed between the sealing seat (4) and the wear-resistant bushing (2); the two oil seals (8) are separated by a spacer (6); the spacer (6) is provided with a circle of air inlet grooves and a circle of air inlet holes, and the air inlet grooves are connected to the air inlet holes on the sealing seat (4).

2. The shaft end sealing structure with multiple seal combinations according to claim 1, characterized in that: The sealing block (3) is mounted on the wear-resistant bushing (2), the sealing seat (4) is sleeved on the sealing block (3), and the sealing block (3) is made of polytetrafluoroethylene.

3. The shaft end sealing structure with multiple seal combinations according to claim 1, characterized in that: The sealing seat (4) is fixedly connected to the wall panel (14) and the sealing seat end cover (7) by means of bolts.

4. The shaft end sealing structure with multiple seal combinations according to claim 1, characterized in that: The two oil seals (8) are both split-seal oil seals, and the openings of the two oil seals (8) are both oriented toward the machine body.

5. The shaft end sealing structure with multiple seal combinations according to claim 1, characterized in that: An air intake connector (5) is installed in the air intake hole, and the air intake connector (5) is connected to an external air pipe.

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