High-pressure-resistant shaft end mechanical sealing device

Abstract

The utility model discloses a high-pressure-resistant shaft end mechanical sealing device, which relates to the technical field of mechanical sealing and comprises a shaft sleeve, a base flange is sleeved on the outer side of the middle of the shaft sleeve, a sealing component is arranged between the base flange and the shaft sleeve, a sealing reinforcing component is arranged inside the sealing component, and a lubricating oil adding component is arranged in the middle of the sealing component. One end of the outer side of the shaft sleeve is sleeved with a driving ring, and the other end of the outer side of the shaft sleeve is sleeved with a pump ring; a shaft sleeve gasket is arranged on the inner wall of one end of the shaft sleeve; a flange gasket is arranged on the side wall of the base flange; the sealing assembly comprises a static sealing ring arranged between the base flange and the shaft sleeve, a rotating sealing ring is arranged at the end, close to the pump ring, of the static sealing ring, and a sealing rotating body is arranged at the end, close to the pump ring, of the rotating sealing ring. According to the utility model, excellent sealing performance can be provided for the shaft end in a high-pressure environment, and the durability and the reliability are enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical seal technical field, specifically, relate to a high pressure shaft end mechanical seal device. BACKGROUND

[0002] In industrial applications, the shaft end sealing of mechanical equipment is a key component to ensure normal operation of the equipment and prevent medium leakage. Among them, the shaft end mechanical seal device is a key component for preventing fluid leakage, usually used in rotating equipment such as pumps, compressors, mixers and other mechanical devices that require shafts to pass through the equipment shell. Its function is to ensure that the fluid (such as liquid or gas) in the sealed cavity does not leak along the shaft to the outside, while preventing external impurities from entering the working cavity.

[0003] Traditional sealing devices are prone to failure due to wear of sealing materials or temperature rise when facing high pressure and corrosive media. Such failure not only causes equipment downtime, but also may cause medium leakage, leading to safety and environmental problems. Therefore, the industry urgently needs a high-pressure shaft end mechanical seal device to solve the above problems. SUMMARY

[0004] In view of the problems in the related art, the utility model provides a high-pressure shaft end mechanical seal device to overcome the above technical problems existing in the prior art.

[0005] Therefore, the utility model adopts the specific technical scheme as follows:

[0006] A high-pressure shaft end mechanical seal device, comprising a shaft sleeve, a base flange is provided on the outer side of the middle part of the shaft sleeve, a sealing assembly is provided between the base flange and the shaft sleeve, a sealing reinforcing assembly is provided inside the sealing assembly, and a lubricating oil adding assembly is provided in the middle part of the sealing assembly; a driving ring is provided on one end of the outer side of the shaft sleeve, and a pump ring is provided on the other end of the outer side of the shaft sleeve; a shaft sleeve gasket is provided on the inner wall of one end of the shaft sleeve, and a flange gasket is provided on the side wall of the base flange.

[0007] Further, in order to ensure the effective sealing of the shaft end under different operating conditions, the sealing assembly comprises a stationary sealing ring provided between the base flange and the shaft sleeve, a rotating sealing ring provided on the shaft sleeve at one end close to the pump ring, and a sealing rotating body provided on the shaft sleeve at one end close to the pump ring. Threaded holes are provided in the pump ring and the sealing rotating body.

[0008] Further, in order to provide additional sealing pressure and wear compensation capacity, the sealing reinforcing assembly comprises a thrust ring and a first spring provided between the inside of the rotating sealing ring and the sealing rotating body in sequence; a gasket is provided between the inner wall of the stationary sealing ring and the base flange at one end of the stationary sealing ring away from the rotating sealing ring; and a fixed sealing ring is provided on the outer side of the stationary sealing ring.

[0009] Further, to provide effective lubrication and cooling, the lubricating oil adding assembly includes a lubricating oil multi-point injection pipeline arranged in the middle of the sealing assembly, and one end of the lubricating oil multi-point injection pipeline is provided with an elastic baffle ring at the bottom of the base flange.

[0010] Further, to provide additional protection, a sealing cover is sleeved between the base flange and the driving ring and outside the shaft sleeve, the side of the sealing cover is provided with a safety bushing, the safety bushing is internally provided with a second spring, and one end of the second spring is connected with the base flange.

[0011] The beneficial effects of the utility model are as follows:

[0012] (1) The utility model can provide excellent sealing performance for the shaft end in a high-pressure environment, and the durability and reliability are enhanced.

[0013] (2) The sealing assembly is arranged, so that the effective sealing of the shaft end under different operating conditions is ensured through the configuration of the static sealing ring and the rotating sealing ring, and the design of the rotating sealing ring and the sealing rotating body enhances the reliability and durability of the sealing; the sealing reinforcing assembly is arranged, so that additional sealing pressure and wear compensation capacity are provided, and the sealing effect under high-pressure conditions is maintained.

[0014] (3) The lubricating oil adding assembly is arranged, so that the lubricating oil can be uniformly distributed on the sealing assembly, effective lubrication and cooling are provided, wear and heat accumulation are reduced, and the service life of the sealing assembly is prolonged.

[0015] (4) The sealing cover, the safety bushing and the second spring are arranged, so that additional protection is provided, and the shaft and the sealing related components are prevented from being worn due to friction or vibration. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings.

[0017] Figure 1 It is a structural schematic view of a high-pressure-resistant shaft end mechanical sealing device according to an embodiment of the utility model;

[0018] Figure 2 It is a partial schematic view of a high-pressure-resistant shaft end mechanical sealing device according to an embodiment of the utility model;

[0019] Figure 3 It is Figure 1A local enlarged view at the center of A.

[0020] In the figure:

[0021] 1, shaft sleeve; 2, base flange; 3, sealing assembly; 301, static sealing ring; 302, rotating sealing ring; 303, sealing rotating body; 4, sealing reinforcing assembly; 401, thrust ring; 402, first spring; 403, gasket; 404, fixed sealing ring; 5, lubricating oil adding assembly; 501, lubricating oil multi-point injection pipeline; 502, elastic retainer; 6, driving ring; 7, pump ring; 8, shaft sleeve gasket; 9, flange gasket; 10, sealing cover; 11, safety bushing; 12, second spring; 13, threaded hole. DETAILED DESCRIPTION

[0022] To further illustrate the embodiments, the utility model provides the drawings, these drawings are part of the utility model disclosure, it mainly used to illustrate the embodiment, and can cooperate with the related description of the specification to explain the operation principle of the embodiment, cooperate with reference to these contents, the person skilled in the art should be able to understand other possible implementation ways and the advantages of the utility model, the components in the figure are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0023] According to the embodiment of the utility model, a high-pressure-resistant shaft end mechanical sealing device is provided.

[0024] The utility model is further illustrated in conjunction with the drawings and specific embodiments, such as Figures 1-3 As shown in the drawings, the high-pressure-resistant shaft end mechanical sealing device according to the embodiment of the utility model comprises a shaft sleeve 1, a base flange 2 is sleeved on the outer side of the middle part of the shaft sleeve 1, a sealing assembly 3 is arranged between the base flange 2 and the shaft sleeve 1, a sealing reinforcing assembly 4 is arranged in the sealing assembly 3, and a lubricating oil adding assembly 5 is arranged in the middle part of the sealing assembly 3; a driving ring 6 is sleeved on one end of the outer side of the shaft sleeve 1, and a pump ring 7 is sleeved on the other end of the outer side of the shaft sleeve 1; a shaft sleeve gasket 8 is arranged on the inner wall of one end of the shaft sleeve 1, and a flange gasket 9 is arranged on the side wall of the base flange 2. Through the precise cooperation of the components such as the driving ring 6, the pump ring 7 and the shaft sleeve 1, the structural stability and overall reliability of the device are ensured, and the high-pressure operation demand in various operating environments is adapted.

[0025] With the above-mentioned scheme, the utility model can provide excellent sealing performance for the shaft end in a high-pressure environment, and enhance the durability and reliability.

[0026] In one embodiment, for the sealing assembly 3 described above, the sealing assembly 3 comprises a static sealing ring 301 arranged between the base flange 2 and the shaft sleeve 1, a rotating sealing ring 302 arranged on the shaft sleeve 1 at one end of the static sealing ring 301 close to the pump ring 7, and a sealing rotating body 303 arranged on the shaft sleeve 1 at one end of the rotating sealing ring 302 close to the pump ring 7, wherein threaded holes are arranged in the pump ring 7 and the sealing rotating body 303, so that the effective sealing of the shaft end under different operating conditions is ensured by the arrangement of the static sealing ring 301 and the rotating sealing ring 302, and the reliability and durability of the sealing are enhanced by the design of the rotating sealing ring 302 and the sealing rotating body 303.

[0027] In one embodiment, for the sealing reinforcing assembly 4 described above, the sealing reinforcing assembly 4 comprises a thrust ring 401 and a first spring 402 arranged in sequence between the rotating sealing ring 302 and the inside of the sealing rotating body 303, a gasket 403 arranged at one end of the static sealing ring 301 away from the rotating sealing ring 302 and between the static sealing ring 301 and the inner wall of the base flange 2, and a fixed sealing ring 404 arranged on the outside of the static sealing ring 301, so as to provide additional sealing pressure and wear compensation capability, and help to maintain the sealing effect under high pressure conditions.

[0028] In one embodiment, for the lubricating oil adding assembly 5 described above, the lubricating oil adding assembly 5 comprises a lubricating oil multi-point injection pipeline 501 arranged in the middle of the sealing assembly 3, and an elastic check ring 502 arranged at one end of the lubricating oil multi-point injection pipeline 501 and at the bottom of the base flange 2, so as to ensure that the lubricating oil can be uniformly distributed on the sealing assembly 3, provide effective lubrication and cooling, reduce wear and heat accumulation, and prolong the service life of the sealing assembly 3.

[0029] The multi-point injection helps to balance the pressure on both sides of the seal and enhance the sealing effect. The elastic check ring 502 can absorb mechanical impact, further prolonging the service life of the device.

[0030] In one embodiment, for the shaft sleeve 1 described above, a sealing cover 10 is arranged between the base flange 2 and the driving ring 6 and on the outside of the shaft sleeve 1, a safety bushing 11 is arranged on the side of the sealing cover 10, a second spring 12 is arranged in the safety bushing 11, and one end of the second spring 12 is connected with the base flange 2, so as to provide additional protection against wear and tear of the shaft and related components due to friction or vibration.

[0031] In order to facilitate the understanding of the above technical solutions of the present application, the working principle or operation mode of the present application in the actual process will be described in detail below.

[0032] In actual application, the dynamic sealing surface is formed by the static sealing ring 301 and the rotating sealing ring 302, the static sealing ring 301 is fixed on the base flange 2, and the rotating sealing ring 302 rotates along with the rotation of the shaft sleeve 1. The thrust ring 401 and the first spring 402 provide axial pressure to ensure the close contact between the static sealing ring 301 and the rotating sealing ring 302. The pressure compensates the wear of the static sealing ring 301 and the rotating sealing ring 302 and maintains the sealing performance under high pressure. The gasket 403 and the fixed sealing ring 404 provide additional sealing support and fixation.

[0033] The multiple nozzles of the lubricating oil multi-point injection pipeline 501 uniformly distribute the lubricating oil, reducing the friction and wear between the sealing surfaces. The driving ring 6 and the pump ring 7 keep the shaft sleeve 1 stable and rotating, supporting the stability of the entire sealing device. The safety bushing 11 and the second spring 12 provide additional buffering for the shaft and other sealing components.

[0034] In summary, the utility model can provide excellent sealing performance for the shaft end in a high pressure environment, and enhance the durability and reliability. By arranging the sealing assembly 3, the effective sealing of the shaft end under different operating conditions is ensured through the arrangement of the static sealing ring 301 and the rotating sealing ring 302, and the design of the rotating sealing ring 302 and the sealing rotating body 303 enhances the reliability and durability of the sealing. By arranging the sealing reinforcing assembly 4, additional sealing pressure and wear compensation ability are provided, which helps to maintain the sealing effect under high pressure. By arranging the lubricating oil adding assembly 5, it is ensured that the lubricating oil can be uniformly distributed on the sealing assembly 3, providing effective lubrication and cooling, reducing wear and heat accumulation, and prolonging the service life of the sealing assembly 3. By arranging the sealing cover 10, the safety bushing 11 and the second spring 12, additional protection is provided to prevent the shaft and the sealing related components from being worn due to friction or vibration.

[0035] In the utility model, unless otherwise specified and limited, the terms "mounting", "arrangement", "connection", "fixing", "rotary connection" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements, unless otherwise specified, the above-mentioned terms in the utility model can be understood according to the specific meaning of the above-mentioned terms in the utility model by the person skilled in the art.

[0036] The above is only the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-pressure resistant shaft end mechanical seal device, comprising a shaft sleeve, characterized in that, A base flange is fitted on the outer side of the middle part of the bushing. A sealing assembly is provided between the base flange and the bushing. A sealing reinforcement assembly is provided inside the sealing assembly. A lubrication oil filling assembly is provided in the middle of the sealing assembly. A drive ring is fitted at one outer end of the bushing, and a pump ring is fitted at the other outer end of the bushing; a bushing gasket is provided on the inner wall of one end of the bushing, and a flange gasket is provided on the side wall of the base flange; the sealing assembly includes a stationary sealing ring disposed between the base flange and the bushing, a rotating sealing ring disposed on the bushing at the end of the stationary sealing ring near the pump ring, and a sealing rotating body disposed on the bushing at the end of the rotating sealing ring near the pump ring; the sealing reinforcement assembly includes a thrust ring and a first spring disposed sequentially between the interiors of the rotating sealing ring and the sealing rotating body; A gasket is provided at the end of the stationary sealing ring away from the rotating sealing ring and between the stationary sealing ring and the inner wall of the base flange, and a fixing sealing ring is sleeved on the outer side of the stationary sealing ring.

2. The high-pressure resistant shaft end mechanical seal device according to claim 1, characterized in that, The lubrication assembly includes a lubricating oil multi-point injection pipe disposed in the middle of the sealing assembly, and an elastic retaining ring is provided at one end of the lubricating oil multi-point injection pipe and at the bottom of the base flange.

3. The high-pressure resistant shaft end mechanical seal device according to claim 1, characterized in that, A sealing cover is fitted between the base flange and the drive ring and on the outside of the bushing. A safety bushing is provided on the side of the sealing cover, and a second spring is provided inside the safety bushing. One end of the second spring is connected to the base flange.

4. A high-pressure resistant shaft end mechanical seal device according to claim 2, characterized in that, Both the pump ring and the sealing rotating body are provided with threaded holes.

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