A single-end mechanical seal structure for a balanceless tank suitable for high-pressure and high-temperature environments

Abstract

This utility model relates to the technical field of single-end mechanical seal structures. It provides a balance-free single-end mechanical seal structure suitable for high-pressure and high-temperature environments, comprising a stationary ring, a rotating ring, and a spring-loaded seat. The stationary and rotating rings slide tightly against each other at their opposite ends. The spring-loaded seat is pressed against the top of the rotating ring. The spring-loaded seat includes a rotating ring positioning ring and a locking ring. The rotating ring positioning ring is engaged with the lower end face of the rotating ring, and the locking ring is locked onto the shaft to be sealed and rotates with it. Elastic connecting elements are provided at four positions (front, back, left, and right) between the locking ring and the rotating ring. Four damping connecting pads are also provided between the locking ring and the rotating ring. The four damping connecting pads and the four elastic connecting elements are staggered around the center of the locking ring. This mechanical seal structure, through the organic combination of elastic connecting elements and damping connecting pads, not only improves the elastic compensation and sealing performance between the rotating and stationary rings but also effectively alleviates the impact load caused by sudden pressure changes or mechanical vibrations.

Description

Technical Field

[0001] This utility model relates to the technical field of single-end mechanical seal structure, specifically to a balance tank single-end mechanical seal structure suitable for high-pressure and high-temperature environments. Background Technology

[0002] Balanceless tank single-end-face mechanical seals are widely used in industrial equipment operating under high pressure and high temperature conditions. They aim to achieve a sealing effect while simplifying structural design and reducing maintenance costs. Traditional balanceless tank mechanical seals mainly consist of a stationary ring, a rotating ring, and a spring. The elastic force provided by the spring achieves end-face sealing, ensuring the sealing of the medium and the normal operation of the equipment. As industrial production demands increasingly higher equipment reliability and sealing performance, existing mechanical seal structures are constantly being optimized to adapt to extreme conditions such as high pressure, high temperature, and corrosive media.

[0003] However, existing single-end mechanical seals for unbalanced tanks still have some shortcomings in practical applications. First, under high pressure and high temperature environments, the sealing surfaces between the rotating and stationary rings are easily affected by temperature changes, pressure fluctuations, and mechanical vibrations, making it difficult to maintain a stable tight seal, thus leading to leakage or seal failure. Second, while traditional spring structures can provide some elastic compensation, under extreme conditions, the elastic deformation and fatigue life of the springs are limited, making it difficult to effectively buffer stress changes caused by vibration, impact, or thermal expansion and contraction, resulting in decreased sealing performance and shortened service life. Furthermore, a single spring structure lacks sufficient buffering capacity when dealing with vibration and impact, easily amplifying mechanical vibrations and affecting equipment stability.

[0004] Furthermore, existing sealing structures lack sufficient buffering and absorption capacity for vibrations and shocks under high temperature and high pressure environments, failing to effectively mitigate the transmission of mechanical vibrations. This leads to accelerated wear of the sealing surface due to vibration, and even premature failure. Simultaneously, traditional sealing structures lack elastic buffering and damping measures when dealing with sudden pressure changes or mechanical vibrations, making it difficult to achieve dynamic pressure regulation and stress dispersion, thus affecting the long-term effectiveness and reliability of the seal.

[0005] Therefore, this solution proposes a single-end mechanical seal structure for a balanceless tank suitable for high-pressure and high-temperature environments to solve the above problems. Utility Model Content

[0006] To overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a single-end mechanical seal structure for a balanceless tank suitable for high-pressure and high-temperature environments.

[0007] To achieve the aforementioned objective, the technical solution of this utility model is as follows: A single-end mechanical seal structure for a balanceless tank suitable for high-pressure and high-temperature environments includes a stationary ring, a rotating ring, and a spring-loaded seat. The opposite end faces of the stationary ring and the rotating ring are tightly slidably fitted together. The spring-loaded seat is pressed against the top of the rotating ring. The spring-loaded seat includes a rotating ring positioning ring and a locking ring. The rotating ring positioning ring is engaged with the lower end face of the rotating ring. The locking ring is locked onto the shaft to be sealed and rotates with it. Elastic connecting parts are provided in four directions (front, back, left, and right) between the locking ring and the rotating ring. Four damping connecting pads are also provided between the locking ring and the rotating ring. The four damping connecting pads and the four elastic connecting parts are staggered around the center of the locking ring.

[0008] Preferably, the elastic connector includes a through post, a limiting cap, and a spring. The top end of the through post is installed on the lower end face of the positioning ring of the moving ring, the bottom end of the through post slides through the locking ring, and the protruding end slides out through the limiting cap screwed to its bottom end. The spring is sleeved on the top end of the through post and presses against the locking ring and the moving ring.

[0009] Preferably, the damping connecting pad is arc-shaped, and an inner cavity is provided inside the damping connecting pad. An air guide hole communicating with the inner cavity is opened on the right end face of the damping connecting pad.

[0010] Preferably, a stationary ring sealing ring is fitted onto the outer ring of the boss on the stationary ring, and a rotating ring sealing ring is snapped onto the inner ring of the rotating ring.

[0011] Preferably, the upper end face of the moving ring positioning ring is provided with four plug-in pins, and all four plug-in pins are plugged into the lower end face of the moving ring.

[0012] Preferably, the locking ring is locked to the inner rotating shaft to be sealed by locking bolts screwed in from four sides.

[0013] The beneficial effects of this utility model are reflected in:

[0014] This mechanical seal structure significantly enhances the elastic compensation capability between the rotating and stationary rings by incorporating an elastic connector and a damping connecting pad between the rotating and locking rings. The elastic connector, composed of a through-hole post, a limiting cap, and a spring, effectively buffers changes in clamping force caused by rotational friction and wear of the mechanical seal surface under high temperature and pressure conditions, ensuring a tight fit between the rotating and stationary ring end faces and maintaining the stability and reliability of the sealing effect. Simultaneously, the spring structure provides the mechanical seal with excellent elastic compensation performance, enabling it to adapt to minor changes in size and position caused by temperature expansion, pressure fluctuations, etc., thus extending the service life of the mechanical seal.

[0015] Furthermore, the damping connection pads feature an arc-shaped design with internal air vents connecting to the inner cavity. This effectively absorbs and smoothly transmits rapid pressure changes and mechanical vibration impacts within the unbalanced tank, enhancing the mechanical seal structure's vibration and impact resistance under high-pressure and high-temperature extreme conditions. The damping pads and elastic connectors are staggered to ensure uniform stress distribution, further strengthening the overall stability and durability of the structure.

[0016] In summary, this mechanical seal structure, through the organic combination of elastic connectors and damping connecting pads, not only improves the elastic compensation and sealing performance between the dynamic and static rings, but also effectively alleviates the impact load caused by sudden pressure changes or mechanical vibrations. It significantly enhances the adaptability and reliability of the mechanical seal in high-pressure and high-temperature environments, extends the maintenance cycle and service life of the equipment, and meets the stringent requirements of balanceless tanks for high stability and high durability of the sealing system. It has significant practical application value and promising prospects for promotion. Attached Figure Description

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is an exploded separation diagram of this utility model;

[0020] Figure 3 This is a schematic diagram of the stationary ring of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the moving ring of this utility model;

[0022] Figure 5 This is an exploded separation diagram of the spring clamping seat of this utility model;

[0023] Figure 6 This is a structural schematic diagram of the elastic connector of this utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the damping connection pad of this utility model;

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Stationary ring; 2. Moving ring; 3. Spring-loaded retainer;

[0027] 11. Stationary ring seal;

[0028] 21. Dynamic ring seal;

[0029] 31. Dynamic ring positioning ring; 32. Locking ring; 33. Elastic connector; 34. Damping connecting pad;

[0030] 311. Insertion post;

[0031] 321. Locking bolt;

[0032] 331. Through-hole post; 332. Limiting cap; 333. Spring;

[0033] 341. Inner cavity; 342. Air vent. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, and not all of them. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the utility model without creative effort are within the scope of protection of the utility model.

[0035] It should be noted that if the utility model embodiment involves directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0036] Furthermore, "multiple" refers to two or more. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the utility model.

[0037] Please refer to the instruction manual appendix. Figures 1-7 This invention provides a single-end mechanical seal structure for a balanceless tank suitable for high-pressure and high-temperature environments. The mechanical seal structure mainly includes a stationary ring 1, a rotating ring 2, and a spring-loaded clamping seat 3. The stationary ring 1 and the rotating ring 2 are tightly slidably fitted together at their opposite end faces, ensuring the stability and reliability of the sealing effect.

[0038] A spring-loaded retainer 3 is located at the top of the rotating ring 2 to provide a continuous clamping force. The spring-loaded retainer 3 includes a rotating ring positioning ring 31 and a locking ring 32. The rotating ring positioning ring 31 is engaged with the lower end face of the rotating ring 2 to ensure the accuracy and stability of the positioning of the rotating ring 2. The locking ring 32 is locked onto the shaft to be sealed and rotates with the shaft to ensure the coaxiality and synchronous rotation of the rotating ring and the shaft.

[0039] Elastic connectors 33 are provided at four positions (front, back, left, and right) between the moving ring 2 and the locking ring 32. Each elastic connector 33 consists of a through-pin 331, a limiting cap 332, and a spring 333. The top of the through-pin 331 is installed on the lower end face of the moving ring positioning ring 31, and the bottom of the through-pin 331 slides through the locking ring 32. The protruding end is fixed by the limiting cap 332 screwed to its bottom end. The spring 333 is sleeved on the top of the through-pin 331 and presses against the locking ring 32 and the moving ring 2, realizing the functions of elastic buffering and stress release. At the same time, it can adapt to the pressing operation after the rotating friction wear of the moving ring 2 and the stationary ring 1, providing good elastic compensation.

[0040] In addition, four damping connecting pads 34 are provided between the moving ring 2 and the locking ring 32. These damping connecting pads 34 have an arc-shaped structure with an internal cavity 341 and a vent hole 342 communicating with the internal cavity on the right end face. The design of the damping connecting pads 34 effectively buffers vibration and impact, improving the stability and durability of the mechanical seal structure under high pressure and high temperature environments. The four damping connecting pads 34 and the four elastic connecting members 33 are staggered around the center of the locking ring 32 to ensure uniform force distribution.

[0041] The stationary ring 1 has a boss, and the outer ring of the boss is fitted with the stationary ring sealing ring 11. The inner ring of the rotating ring 2 is fitted with the rotating ring sealing ring 21. The sealing ring is made of high temperature and high pressure resistant material to ensure the sealing performance and durability of the sealing surface.

[0042] The upper end face of the rotating ring positioning ring 31 is provided with four insertion posts 311, which are inserted into the lower end face of the rotating ring 2 to achieve a reliable connection between the rotating ring positioning ring and the rotating ring. The locking ring 32 is locked to the inner rotating shaft to be sealed by locking bolts 321 screwed in from four sides to ensure the tightness and stability of the locking ring and the shaft.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-pressure high-temperature environment applicable unbalanced tank single-end-face mechanical seal structure comprising a static ring (1), a dynamic ring (2) and a spring jacking seat (3), characterized in that, The stationary ring (1) and the moving ring (2) slide tightly against each other at their opposite ends. The spring clamping seat (3) is clamped against the top of the moving ring (2). The spring clamping seat (3) includes a moving ring positioning ring (31) and a locking ring (32). The moving ring positioning ring (31) is engaged with the lower end face of the moving ring (2). The locking ring (32) is locked on the shaft to be sealed and rotates with it. Elastic connecting parts (33) are provided in all four directions (front, back, left, and right) between the locking ring (32) and the moving ring (2). Four damping connecting pads (34) are also provided between the locking ring (32) and the moving ring (2). The four damping connecting pads (34) and the four elastic connecting parts (33) are staggered around the center of the locking ring (32).

2. The high pressure and high temperature applicable unbalance-free canned single mechanical seal structure according to claim 1, characterized in that, The elastic connector (33) includes a through post (331), a limiting cap (332), and a spring (333). The top end of the through post (331) is installed on the lower end face of the moving ring positioning ring (31). The bottom end of the through post (331) slides through the locking ring (32), and the protruding end slides out through the limiting cap (332) screwed to its bottom end. The spring (333) is sleeved on the top end of the through post (331) and pressed against the locking ring (32) and the moving ring (2).

3. The high pressure and high temperature applicable unbalance-free canned single mechanical seal structure according to claim 1, characterized in that, The damping connecting pad (34) is arc-shaped, and an inner cavity (341) is provided inside the damping connecting pad (34). An air guide hole (342) communicating with the inside of the inner cavity (341) is provided on the right end face of the damping connecting pad (34).

4. The high pressure and high temperature compatible, unbalance-free, canned, single mechanical seal assembly as claimed in claim 1, wherein, The outer ring of the boss on the stationary ring (1) is fitted with a stationary ring sealing ring (11), and the inner ring of the moving ring (2) is fitted with a moving ring sealing ring (21).

5. The high pressure and high temperature compatible, unbalance-free, canned, single mechanical seal assembly as described in claim 1, wherein, The upper end face of the moving ring positioning ring is provided with four plug-in pins (311), and the four plug-in pins (311) are all plugged into the lower end face of the moving ring (2).

6. The high pressure and high temperature compatible, unbalance-free, canned, single mechanical seal assembly as claimed in claim 1, wherein, The locking ring (32) is locked to the inner rotating shaft to be sealed by locking bolts (321) screwed in from four sides.

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