A shaft end split dynamic seal structure

Abstract

The present invention provides a shaft end split dynamic sealing structure, comprising: a fixed end cover of a box body, a shaft end follower cover and a dust cover; the fixed end cover of the box body is assembled on the box body, and the shaft end follower cover is assembled on the shaft body of the protruding part of the rotating shaft; the axial outer side surface of the fixed end cover of the box body is processed with an annular groove, and the axial inner side surface of the shaft end follower cover is processed with an annular protrusion, and the inner side surface of the shaft end follower cover is buckled with the outer side surface of the fixed end cover of the box body; the present application changes the original single-layer end cover seal into a split seal, ensures that the annular protrusion of the shaft end follower cover is embedded in the annular groove of the fixed end cover of the box body, and the bottom end fits, and after determining the position, the shaft end follower cover is finally locked and positioned by screws, and the shaft end follower cover and the rotating shaft are fastened to the rotating shaft by radially assembled screws; in this way, a dynamic seal is formed, and at the same time, the radial matching clearance between the annular groove and the annular protrusion is used to offset the vibration of the rotating shaft of the nine-axis roller screen, and at the same time, for the convenience of assembly and alignment.

Description

Technical Field

[0001] The invention relates to the technical field of roller-type mining screening devices, and in particular to a sealing structure of a shaft end dust seal. Background Art

[0002] Roller-type mining screening device, usually a nine-axis roller screen, is a screening device for mining. At present, the shaft end is sealed by a single-layer end cover fixed on the shell for sealing. The amount of dust during use is very large, and it is very easy to leak dust due to poor shaft end seal. In this way, it needs to be repaired and replaced manually, which causes pollution and high maintenance costs. At the same time, the leaked dust will affect the operation of the external power device;

[0003] In addition, the transmission mechanism of the roller is usually on the outside, and when screening heavier ores, the internal impact is obvious, and the rotating shaft often vibrates irregularly, further affecting the sealing durability of the end cover. Summary of the invention

[0004] According to the technical problems raised above, a split type nine-axis roller screen shaft end sealing device capable of realizing dynamic sealing is provided. The technical means adopted by the present invention are as follows:

[0005] A shaft end split dynamic sealing structure, comprising:

[0006] Box fixed end cover, shaft end follower cover and dust cover;

[0007] The fixed end cover of the box body is detachably assembled at the rotating shaft opening of the side wall of the box body by bolts, and a circular hole for the rotating shaft to extend out is provided at the center;

[0008] The shaft end follower cover is detachably mounted on the shaft body of the rotating shaft extending from the fixed end cover of the box body, and the shaft end follower cover rotates synchronously with the rotating shaft;

[0009] The axial outer side surface of the fixed end cover of the box body is processed with an annular groove, and the axial inner side surface of the shaft end follower cover is processed with an annular protrusion. The inner side surface of the shaft end follower cover is buckled with the outer side surface of the fixed end cover of the box body, and the annular protrusion is just embedded in the annular groove, and the bottom of the annular protrusion is in contact with the bottom of the annular groove;

[0010] The width of the annular groove is 2-3 mm greater than the width of the annular protrusion 21;

[0011] The bottom end surface of the annular protrusion is processed with a plurality of annular depressions or small spherical depressions;

[0012] The dust cover is covered on the outside of the shaft end follower cover, and the end is detachably assembled with the side wall of the box body by bolts.

[0013] The present application changes the original single-layer end cover seal to a split seal. First, the box body fixed end cover is fixed to the box body, and then the shaft end follower cover is assembled to ensure that the annular protrusion of the shaft end follower cover is embedded in the annular groove of the box body fixed end cover, and the bottom end fits. After the position is determined, the shaft end follower cover is finally locked. Screw locking is usually selected for positioning. The shaft end follower cover and the rotating shaft are fastened to the rotating shaft by radially assembled screws.

[0014] In this way, a dynamic seal is formed. At the same time, the radial matching clearance between the annular groove and the annular protrusion is to offset the vibration of the rotating shaft of the nine-axis roller screen and to facilitate assembly and alignment;

[0015] Furthermore,

[0016] A lubrication hole is provided on the side wall of the dust cover, a sealing cover is provided at the lubrication hole, one end of the sealing cover is hinged to the dust cover, and the other end is screwed to the dust cover;

[0017] The inner wall of the dust cover is provided with a guide groove extending downwardly at the lower edge of the lubrication hole, the guide groove is inclined toward the joint gap between the fixed end cover of the box body and the follower cover at the shaft end, and a brush is fixed at the end of the guide groove, and the end of the brush is in contact with the joint gap between the fixed end cover of the box body and the follower cover at the shaft end;

[0018] The staff opens the sealing cover and pours lubricating oil into the guide groove. The lubricating oil is guided to the brush and is always immersed in the lubricating oil. The end can continuously input lubricating oil at a very low flow rate to the joint between the fixed end cover of the box and the follower cover at the shaft end. The lubricating oil further utilizes the vibration of the rotating shaft and the radial fitting clearance between the annular groove and the annular protrusion to dynamically introduce the lubricating oil into the fitting part of the annular groove and the annular protrusion in the radial direction. This lubrication effect is excellent, which greatly reduces the wear of components, saves a lot of lubricating oil, and increases the sealing. Manual lubrication is very convenient.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. Greatly improve the sealing performance and prevent the leakage of dust from the shaft end.

[0021] 2. The overall structure is reasonably designed, the assembly method is simple, and it can be operated manually and easily.

[0022] 3. It can realize real-time dynamic sealing and real-time lubrication, with long service life and convenient lubrication operation.

[0023] In summary, the technical solution of the present invention is a dynamic sealing structure that is extremely friendly to manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 This is a top view of the fixed end cover of the box body of the present invention.

[0027] Figure 3 This is a cross-sectional view of the fixed end cover of the box body of the present invention.

[0028] Figure 4 It is a top view of the shaft end follower cover of the present invention.

[0029] Figure 5 It is a cross-sectional view of the shaft end follower cover of the present invention.

[0030] Figure 6 It is a schematic diagram of the annular depression of the shaft end follower cover of the present invention.

[0031] In the figure: 1. Fixed end cover of the box; 2. Follower cover at the shaft end; 3. Dust cover; 4. Rotating shaft;

[0032] 11. Annular groove;

[0033] 21. annular protrusion; 211. annular depression;

[0034] 31. Lubrication hole; 32. Sealing cover; 33. Guide groove; 34. Brush. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. 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 "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear 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 technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar 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.

[0039] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, 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 contours of each component itself.

[0040] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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 their position 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.

[0041] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0042] like Figures 1 to 6 As shown, the present invention provides a shaft end split dynamic seal structure, comprising:

[0043] The box body has a fixed end cover 1, a shaft end follower cover 2 and a dust cover 3;

[0044] The box body fixed end cover 1 is detachably assembled at the rotating shaft opening of the box body side wall by bolts, and a circular hole for the rotating shaft to extend is provided at the center;

[0045] The shaft end follower cover 2 is detachably mounted on the shaft body of the rotating shaft extending from the fixed end cover 1 of the box body, and the shaft end follower cover 2 and the rotating shaft 4 rotate synchronously;

[0046] The axial outer side surface of the box body fixed end cover 1 is processed with an annular groove 11, and the axial inner side surface of the shaft end follower cover 2 is processed with an annular protrusion 21. The inner side surface of the shaft end follower cover 2 is buckled with the outer side surface of the box body fixed end cover 1, and the annular protrusion 21 is just embedded in the annular groove 11, and the bottom of the annular protrusion 21 is in contact with the bottom of the annular groove 11.

[0047] The width of the annular groove 11 is 2-3 mm greater than the width of the annular protrusion 21;

[0048] The bottom end surface of the annular protrusion 21 is processed with a plurality of annular depressions 211 or small spherical depressions;

[0049] The dust cover 3 is covered on the outside of the shaft end follower cover 2, and the end thereof is detachably assembled with the side wall of the box body by bolts.

[0050] A lubrication hole 31 is provided on the side wall of the dust cover 3, and a sealing cover 32 is provided at the position of the lubrication hole 31, and one end of the sealing cover 32 is hinged to the dust cover 3, and the other end is screwed to the dust cover 3;

[0051] The inner wall of the dust cover 3 is provided with a guide groove 33 extending downwardly at an angle at the lower edge of the lubrication hole 31. The guide groove 33 is inclined toward the joint gap between the fixed end cover 1 of the box body and the shaft end follower cover 2. A brush 34 is fixed at the end of the guide groove 33. The end of the brush 34 contacts the joint gap between the fixed end cover 1 of the box body and the shaft end follower cover 2.

[0052] The present application changes the original single-layer end cover seal to a split seal. First, the box body fixed end cover 1 is fixed to the box body, and then the shaft end follower cover 2 is assembled to ensure that the annular protrusion 21 of the shaft end follower cover 2 is embedded in the annular groove 11 of the box body fixed end cover 1, and the bottom end is fitted. After the position is determined, the shaft end follower cover 2 is finally locked, usually by screw locking and positioning. The shaft end follower cover 2 and the rotating shaft 4 are fastened to the rotating shaft by radially assembled screws.

[0053] In this way, a dynamic seal is formed. At the same time, the radial matching clearance between the annular groove 11 and the annular protrusion 21 is to offset the vibration of the rotating shaft of the nine-axis roller screen and to facilitate assembly and alignment;

[0054] The staff opens the sealing cover 32 and pours lubricating oil into the guide groove 33. The lubricating oil is guided to the brush 34. The brush 34 is always immersed in the lubricating oil, so that the end can continuously input lubricating oil at a very low flow rate to the joint between the fixed end cover 1 of the box body and the shaft end follower cover 2. The lubricating oil further utilizes the vibration of the rotating shaft and the radial matching clearance between the annular groove 11 and the annular protrusion 21 to dynamically introduce the lubricating oil into the matching part of the annular groove 11 and the annular protrusion 21 in the radial direction (the annular depression 211 or the small spherical depression on the surface of the annular protrusion 21 will be filled with lubricating oil). This lubrication effect is excellent, which greatly reduces the wear of components, saves a lot of lubricating oil, and increases sealing. Manual lubrication is very convenient.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shaft end split dynamic seal structure, characterized in that: include: A box body fixed end cover (1), a shaft end follower cover (2) and a dust cover (3); The box body fixed end cover (1) is detachably assembled at the rotating shaft opening of the box body side wall by means of bolts, and a circular hole for the rotating shaft to extend out is provided at the center; The shaft end follower cover (2) is detachably mounted on the shaft body of the rotating shaft extending from the fixed end cover (1) of the box body, and the shaft end follower cover (2) and the rotating shaft (4) rotate synchronously; The axial outer side surface of the box body fixed end cover (1) is processed with an annular groove (11), and the axial inner side surface of the shaft end follower cover (2) is processed with an annular protrusion (21). The inner side surface of the shaft end follower cover (2) is buckled with the outer side surface of the box body fixed end cover (1), and the annular protrusion (21) is just embedded in the annular groove (11), and the bottom of the annular protrusion (21) is in contact with the bottom of the annular groove (11); The width of the annular groove (11) is 2-3 mm greater than the width of the annular protrusion (21); The bottom end surface of the annular protrusion (21) is processed with a plurality of annular depressions or small spherical depressions; The dust cover (3) is covered on the outside of the shaft end follower cover (2), and the end thereof is detachably assembled with the side wall of the box body by bolts.

2. The shaft end split dynamic seal structure according to claim 1, characterized in that: A lubrication hole (31) is provided on the side wall of the dust cover (3), a sealing cover (32) is provided at the position of the lubrication hole (31), and one end of the sealing cover (32) is hinged to the dust cover (3), and the other end is screwed to the dust cover (3); The inner wall of the dust cover (3) is provided with a guide groove (33) extending downwardly and obliquely at the lower edge of the lubrication hole (31), the guide groove (33) being inclined toward the joint gap between the box body fixed end cover (1) and the shaft end follower cover (2), and a brush (34) is fixed at the end of the guide groove (33), and the end of the brush (34) is in contact with the joint gap between the box body fixed end cover (1) and the shaft end follower cover (2).

3. A shaft end split dynamic seal structure according to claim 1 or 2, characterized in that: The shaft end follower cover (2) and the rotating shaft (4) are fixed to the rotating shaft by means of radially assembled screws.

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