Sealing device of rotating shaft

Abstract

The utility model relates to a sealing device of a rotating shaft, which comprises a rotating shaft and a sealing sleeve, the sealing sleeve is positioned in the circumferential direction of the rotating shaft, the axial direction of the rotating shaft extends up and down, the sealing device further comprises a compression nut, the sealing sleeve is sleeved in the circumferential direction of the rotating shaft, and the compression nut is positioned above the sealing sleeve and is in threaded fit with the sealing sleeve. According to the sealing device of the rotating shaft, the sealing sleeve is installed in the circumferential direction of the rotating shaft, the gland nut is screwed down, then the rotating shaft can be stably sleeved with the sealing sleeve, and therefore it is guaranteed that the opening of the rotating shaft and the opening of a connected object are sealed.

Description

Technical Field

[0001] The utility model relates to the field of rotating shafts, in particular to a sealing device for rotating shafts. Background Art

[0002] A rotary shaft is a mechanical component that allows the object connected to it to rotate around a centerline. The rotary shaft is a key component in many mechanical devices, used to transmit torque (rotational force) and support rotating parts.

[0003] In mechanical design, sealing the top of the rotating shaft is crucial. It can prevent dust, moisture and other impurities from entering the bearing or other objects connected to it through the top. At the same time, the seal can prevent the surrounding liquid from leaking out from the top. Therefore, how to improve the sealing performance of the top of the rotating shaft has become a problem that needs to be solved urgently by technical personnel in this field. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a sealing device for a rotating shaft by installing a sealing sleeve on the circumference of the rotating shaft and unscrewing the tightening nut so that the sealing sleeve can be stably sleeved on the rotating shaft to ensure the sealing between the rotating shaft and the opening of the connected object.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: it includes a rotating shaft and a sealing sleeve, the sealing sleeve is located in the circumference of the rotating shaft, and the axial direction of the rotating shaft extends up and down, and also includes a clamping nut, the sealing sleeve is sleeved in the circumference of the rotating shaft, and the clamping nut is located above the sealing sleeve and is threadedly engaged with the sealing sleeve.

[0006] The present invention is further configured as follows: it also includes a mating sleeve located in the sealing sleeve, the inner wall of the mating sleeve is in contact with the circumference of the rotating shaft, the mating sleeve includes a mating section at the top and a mating groove located in the circumference of the mating section, the tightening nut includes a head and a working section, the working section is threadedly mated with the sealing sleeve, the head is inserted into the mating groove and the inner wall is in contact with the mating section.

[0007] The utility model is further configured as follows: it also includes a plurality of sealing ring modules, the sealing sleeve is provided with an accommodating cavity, the working section is located in the accommodating cavity and each sealing ring module is located at the bottom of the matching sleeve, and the circumference of each sealing ring module is in contact with the inner wall of the sealing sleeve.

[0008] The present invention is further configured as follows: the sealing sleeve is located below the sealing ring module and is provided with a limited position section protruding inwardly, and the upper end of the limited position section abuts against the bottom of the sealing ring module.

[0009] The utility model is further configured as follows: it also includes a sealing member, the bottom of the sealing sleeve is provided with a loading groove, the sealing member is located in the loading groove and the inner wall thereof is in contact with the circumference of the rotating shaft.

[0010] The utility model is further configured as follows: it also includes a skeleton oil seal, which is located between the clamping nut and the sealing member, and a positioning groove is provided on the sealing member for inserting the top of the skeleton oil seal. The skeleton oil seal includes an inner support leg and an outer support leg, and the inner support leg is fitted with the rotating shaft. An installation groove is provided in the sealing member, and the outer support leg of the skeleton oil seal is located in the installation groove and the outer side is against the sealing member.

[0011] The present invention is further configured to include a third sealing ring, a sealing groove is provided at the bottom of the sealing member, the third sealing ring is located in the sealing groove and abuts against the sealing member on both the inner and outer sides.

[0012] By adopting the above technical solution, 1. Since the sealing sleeve is sleeved on the circumference of the rotating shaft, the liquid leaking outward from the connection opening of the rotating shaft and the device connected to the rotating shaft will be blocked by the sealing sleeve, making it difficult for the internal liquid to flow outward through the opening, thereby realizing the sealing of the rotating shaft and the insertion opening of the device connected to the rotating shaft by the sealing sleeve, and since the clamping nut is located above the sealing sleeve and will cooperate with the sealing sleeve thread, after the connection between the clamping nut and the sealing sleeve is completed, the position of the sealing sleeve and the rotating shaft is determined because the clamping nut is located on the sealing sleeve in the absence of external force, and after tightening the clamping nut, it will generate a downward force on the sealing sleeve, thereby enabling the sealing sleeve to fit more closely to the axial direction of the rotating shaft; 2. If the sealing sleeve needs to be disassembled for inspection or replacement, it is only necessary to loosen the clamping nut and the sealing sleeve can be easily removed without removing the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 A perspective view of a specific embodiment of the present utility model;

[0015] Figure 2 It is a cross-sectional perspective view of the utility model;

[0016] Figure 3 for Figure 2 A magnified view of middle A;

[0017] Figure 4 for Figure 2 Magnified view of B.

[0018] In the figure: 1-rotating shaft;

[0019] 2-sealing sleeve, 21-accommodating cavity, 22-limiting section, 23-loading groove;

[0020] 3- compression nut, 31- head, 32- working section;

[0021] 4-matching sleeve, 41-matching section, 42-matching groove;

[0022] 5- Sealing ring module;

[0023] 6-seal, 61-positioning groove, 62-mounting groove, 63-sealing groove;

[0024] 7-skeleton oil seal, 71-inner support foot, 72-outer support foot;

[0025] 8-The third sealing ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] like Figure 1-Figure 4As shown, the utility model discloses a sealing device for a rotating shaft, including a rotating shaft 1 and a sealing sleeve 2, the sealing sleeve 2 is located in the circumference of the rotating shaft 1, and the axial direction of the rotating shaft 1 extends up and down, and also includes a tightening nut 3, the sealing sleeve 2 is sleeved on the circumference of the rotating shaft 1, the tightening nut 3 is located above the sealing sleeve 2 and is threadedly matched with the sealing sleeve 2, 1. Since the sealing sleeve 2 is sleeved on the circumference of the rotating shaft 1, the liquid leaking outward from the rotating shaft 1 and the device plug-in opening connected to the rotating shaft 1 will be blocked by the sealing sleeve 2, making it difficult for the internal liquid to flow outward across the opening, thereby realizing the sealing sleeve 2 sealing the rotating shaft 1 and the device connected to the rotating shaft 1. The sealing at the insertion opening of the equipment is equipped with a seal, and since the clamping nut 3 is located above the sealing sleeve 2 and will be threadedly matched with the sealing sleeve 2, after the connection between the clamping nut 3 and the sealing sleeve 2 is completed, at this time, without the action of external force, since the clamping nut 3 is located on the sealing sleeve 2, the positions of the sealing sleeve 2 and the rotating shaft 1 are determined, and after tightening the clamping nut 3, it will generate a downward force on the sealing sleeve 2 so that the sealing sleeve 2 can fit the axial direction of the rotating shaft 1 more closely; 2. If the sealing sleeve 2 needs to be disassembled for inspection or replacement, it is only necessary to loosen the clamping nut 3 so that the sealing sleeve 2 can be easily removed without removing the rotating shaft 1.

[0028] Among them, it also includes a matching sleeve 4 located in the sealing sleeve 2, the inner wall of the matching sleeve 4 is in contact with the circumference of the rotating shaft 1, the matching sleeve 4 includes a matching section 41 at the top and a matching groove 42 located in the circumference of the matching section 41, the clamping nut 3 includes a head 31 and a working section 32, the working section 32 is threadedly engaged with the sealing sleeve 2, the head 31 is inserted with the matching groove 42 and the inner wall is in contact with the matching section 41. Since the matching section 41 at the top of the matching sleeve 4 is circumferentially provided with the matching groove 42, after the clamping nut 3 is tightened, the head 31 of the clamping nut 3 will fall into the matching groove 42, thereby further improving the sealing performance. Specifically, if the liquid flows to the circumference of the matching sleeve 4, the liquid continues to move downward toward the clamping nut 3 and will be blocked by the head 31 of the clamping nut 3 and cannot flow out of the clamping nut 3, that is, to the outside world.

[0029] Preferably, it also includes a plurality of sealing ring modules 5, and an accommodating cavity 21 is provided in the sealing sleeve 2, the working section 32 is located in the accommodating cavity 21 and each sealing ring module 5 is located at the bottom of the matching sleeve 4, and the circumference of each sealing ring module 5 is in contact with the inner wall of the sealing sleeve 2. Since each sealing ring module 5 is located at the bottom of the matching sleeve 4, the liquid flowing out from the opening between the rotating shaft 1 and the connecting object will be blocked by these sealing ring modules 5 after flowing to the bottom of each sealing ring module 5 during the leakage process, and will not be able to pass through these sealing ring modules 5 and will not continue to move between the head 31 of the nut and the matching sleeve 4, thereby improving the sealing performance between the rotating shaft 1 and the connecting device.

[0030] Among them, the sealing sleeve 2 is provided with a limiting section 22 protruding inward below the sealing ring module 5 at the bottom, and the upper end surface of the limiting section 22 is abutted against the bottom of the sealing ring module 5. Since the sealing ring module 5 is located in the sealing sleeve 2 and the limiting section 22 will abut against the bottom of the sealing ring module 5, the sealing ring module 5 is first installed during the assembly of the sealing sleeve 2 and the sealing ring module 5. At this time, due to the existence of the limiting section 22, the sealing ring module 5 will not continue to face downward and separate from the sealing sleeve 2, so that the limiting section 22 can provide support for the sealing ring module 5 and prevent it from deforming at this position, and then the matching sleeve 4 is installed above the sealing ring module 5, and finally the tightening nut 3 is screwed in to complete the assembly. Therefore, the setting of each limiting section 22 can facilitate the installation of the sealing ring module 5 into the position inside the sealing sleeve 2.

[0031] Preferably, a seal 6 is also included, and a loading groove 23 is provided at the bottom of the sealing sleeve 2. The seal 6 is located in the loading groove 23 and the inner wall is circumferentially fitted with the rotating shaft 1. Due to the setting of the loading groove 23 at the bottom of the sealing sleeve 2, the sealing performance of the bottom of the sealing sleeve 2 is improved after the seal 6 is installed in the loading groove 23, so that the liquid flowing out from the insertion opening of the rotating shaft 1 and the connecting device will be blocked by the seal 6 after entering the loading groove 23, thereby reducing the liquid from continuing to diffuse and flow into the lower accommodating cavity 21, thereby providing more layers of sealing at the insertion opening of the rotating shaft 1 and the connecting device to improve the overall sealing performance.

[0032] Among them, it also includes a skeleton oil seal 7, which is located between the tightening nut 3 and the seal 6. The seal 6 is provided with a positioning groove 61 for the top of the skeleton oil seal 7 to be inserted. The skeleton oil seal 7 includes an inner support leg 71 and an outer support leg 72. The inner support leg 71 is in contact with the rotating shaft 1. The seal 6 is provided with a mounting groove 62. The outer support leg 72 of the skeleton oil seal 7 is located in the mounting groove 62 and the outer side is against the seal 6. Since the skeleton oil seal 7 includes the inner support leg 71 and the outer support leg 72, it is in contact with the rotating shaft. The fitted inner legs 71 enable the skeleton oil seal 7 to be stably sleeved on the circumference of the rotating shaft 1, while the outer legs 72 are provided so that they can cooperate with the skeleton oil seal 7 located in the positioning groove 61 and the sealing member 6, thereby stably positioning the skeleton oil seal 7 in the mounting groove 62. At the same time, due to the presence of the skeleton oil seal 7, if liquid flows between the inner legs 71 and the outer legs 72, the pressure of the liquid at this time can push the inner legs 71 toward the outer legs 72, thereby further stably positioning the skeleton oil seal 7 between the rotating shaft 1, the pressing nut 3 and the sealing member 6.

[0033] Among them, it also includes a third sealing ring 8. A sealing groove 63 is provided at the bottom of the sealing member 6. The third sealing ring 8 is located in the sealing groove 63 and is against the sealing member 6 on both the inner and outer sides. Since the third sealing ring 8 is located in the sealing groove 63, the setting of the third sealing ring 8 makes it difficult for the liquid to flow into the sealing groove 63 and be blocked by the third sealing ring 8, thereby making it difficult to flow to the installation groove 62 and the skeleton oil seal 7.

[0034] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sealing device for a rotating shaft, comprising a rotating shaft and a sealing sleeve, wherein the sealing sleeve is located circumferentially of the rotating shaft and the axial direction of the rotating shaft extends vertically, characterized in that: It also includes a clamping nut. The sealing sleeve is sleeved on the circumference of the rotating shaft. The clamping nut is located above the sealing sleeve and is threadedly matched with the sealing sleeve.

2. The sealing device for a rotating shaft according to claim 1, characterized in that: It also includes a mating sleeve located in the sealing sleeve, the inner wall of the mating sleeve is in contact with the circumference of the rotating shaft, the mating sleeve includes a mating section at the top and a mating groove located in the circumference of the mating section, the tightening nut includes a head and a working section, the working section is threadedly mated with the sealing sleeve, the head is inserted into the mating groove and the inner wall is in contact with the mating section.

3. The sealing device for a rotating shaft according to claim 2, characterized in that: It also includes a plurality of sealing ring modules. The sealing sleeve is provided with an accommodating cavity. The working section is located in the accommodating cavity and each sealing ring module is located at the bottom of the matching sleeve. The circumference of each sealing ring module is in contact with the inner wall of the sealing sleeve.

4. The sealing device for a rotating shaft according to claim 3, characterized in that: The sealing sleeve is located below the sealing ring module and is provided with a limited position section protruding inwardly, and the upper end of the limited position section abuts against the bottom of the sealing ring module.

5. The sealing device for a rotating shaft according to claim 4, characterized in that: It also includes a sealing member. The bottom of the sealing sleeve is provided with a loading groove. The sealing member is located in the loading groove and the inner wall thereof is in contact with the circumference of the rotating shaft.

6. The sealing device for a rotating shaft according to claim 5, characterized in that: It also includes a skeleton oil seal, which is located between the clamping nut and the seal. The seal is provided with a positioning groove for inserting the top of the skeleton oil seal. The skeleton oil seal includes an inner support leg and an outer support leg. The inner support leg is in contact with the rotating shaft. An installation groove is provided in the seal. The outer support leg of the skeleton oil seal is located in the installation groove and the outer side is against the seal.

7. The sealing device for a rotating shaft according to claim 6, characterized in that: It also includes a third sealing ring. A sealing groove is provided at the bottom of the sealing member. The third sealing ring is located in the sealing groove and is against the sealing member on both the inner and outer sides.

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