Mechanical seal structure with double-sided sealing effect

Abstract

The application discloses a mechanical sealing structure with double-face sealing effect, and particularly relates to the technical field of mechanical bearing sealing, and comprises a sealing self-compensation mechanism, wherein the sealing self-compensation mechanism comprises a dynamic shaft ring, a plurality of dynamic folding strips, a compensation embedded ring and a dynamic sealing ring; the plurality of dynamic folding strips are fixedly connected at one end to one end face of the dynamic shaft ring, and the other end of each dynamic folding strip is fixedly connected with the compensation embedded ring; and the dynamic sealing ring is fixed on one side of the compensation embedded ring. The sealing self-compensation mechanism is used to realize the automatic compensation of the dynamic sealing ring and the static sealing ring by temperature, effectively cope with the sealing influence of thermal expansion and cold contraction caused by temperature change, and greatly improve the durability of the double-face sealing of the mechanical bearing, so as to solve the problems that the mechanical bearing double-face sealing is difficult to automatically adjust to avoid excessive extrusion at high temperature expansion, and is automatically attached to maintain sealing at low temperature contraction, and further cause the poor durability of the mechanical bearing double-face sealing.

Description

Technical Field

[0001] This invention relates to the field of mechanical bearing sealing technology, and more specifically, to a mechanical seal structure with a double-sided sealing effect. Background Technology

[0002] Mechanical bearing sealing structures mainly use a spring to axially push an element, pressing one rotating ring against another stationary ring. This causes the two extremely flat and smooth ring end faces to fit tightly together and rotate relative to each other, thus forming an extremely narrow radial end face gap that prevents media leakage. This gap is usually only a few micrometers wide, and sealing and lubrication are achieved by the surface tension of the liquid film.

[0003] Among existing published documents, patent publication number CN119042243A discloses a corrosion-resistant mechanical seal structure. This technology ensures sealing performance by using a second sealing constraint ring to fill the gap between the positioning plate, the contact block, and the rotating shaft through the positioning ring, thus preventing corrosion of the device due to external factors. The middle part of the convex rod can fit against the rotating shaft, ensuring the stability of the convex rod when supporting and positioning the rotating shaft, while also reducing the contact area between the two. As the convex rod rotates along the second adapter groove on the second inner top ring, it simultaneously supports and seals the rotating shaft, ensuring the device's sealing performance. However, this technology still has the following problems.

[0004] Double-sided sealing of mechanical bearings relies on the contact between the dynamic and static ring seals. However, the sealing environment can be high or low. At high temperatures, the seals expand and compress, causing excessive wear. At low temperatures, the seals contract, creating larger gaps and reducing the sealing effect. Because it is difficult to use temperature to automatically compensate for temperature changes, i.e., it is difficult to automatically adjust to avoid excessive compression when expanding at high temperatures and to automatically fit together to maintain a seal when contracting at low temperatures, the double-sided seal of mechanical bearings cannot effectively cope with the effects of temperature changes, resulting in poor durability. Summary of the Invention

[0005] To overcome the aforementioned deficiencies of the prior art, the present invention provides the following technical solution: a mechanical seal structure with double-sided sealing effect, comprising a bushing, wherein a movable shaft ring is rotatably mounted on the inner wall of the bushing, and a sealing self-compensation mechanism is provided on one end face of the movable shaft ring, the sealing self-compensation mechanism comprising:

[0006] Multiple movable folding strips, one end of which is fixedly connected to one end face of the movable shaft collar, and the other end of each movable folding strip is fixedly connected to a compensation insert ring;

[0007] A dynamic sealing ring is fixedly located on one side of the compensating ring, and one end of the dynamic sealing ring is rotatably in contact with a static sealing ring;

[0008] A compensation sleeve is fixedly located on one side of a static sealing ring. A static folding strip is fixedly installed on one side of the compensation sleeve. A bushing is fixedly connected to one end of the static folding strip. The bushing is fixedly connected to the bushing. Both the dynamic folding strip and the static folding strip are compensated by their own thermal expansion and contraction.

[0009] The compensation inner limit component is located on one side of the movable folding strip. The compensation inner limit component is used to limit the lateral compensation position of the compensation ring.

[0010] The compensation outer limit component is located on one side of the static folding strip, and the compensation outer limit component is used to limit the lateral compensation position of the compensation sleeve.

[0011] In a preferred embodiment, the plurality of dynamic folding strips and the plurality of static folding strips are arranged in a circumferentially equidistant distribution.

[0012] The static sealing ring slides against the bushing.

[0013] In a preferred embodiment, both the dynamic folding strip and the static folding strip are made of graphene, and the dynamic folding strip is bent.

[0014] In a preferred embodiment, the compensation inner limit component includes:

[0015] A support column is located on one side of the static folding strip. One end of the support column is fixedly connected to the dynamic shaft collar, and the other end of the support column is fixedly connected to a support bar. Both ends of the support bar are fixedly connected to limit bars. A compensation gap is provided between one side of the inner wall of the limit bar and the dynamic sealing ring. The top end of the inner wall of the limit bar is slidably connected to the compensation insert ring.

[0016] A linkage bar is fixedly installed on one side of the outer wall of the support bar. A positioning bar is provided on the inner side of the linkage bar. The positioning bar is fixedly connected to the compensation ring. A compensation gap is provided between the positioning bar and the inner wall of the linkage bar.

[0017] In a preferred embodiment, the plurality of the support columns are arranged in a circumferentially equidistant distribution, and the vertical cross-sectional shape of the limiting strip is L-shaped.

[0018] In a preferred embodiment, the inner walls of both limiting strips are smooth surfaces, and the upper surface of the positioning strip is arranged parallel to the upper surface of the linkage strip.

[0019] In a preferred embodiment, the compensating outer limiting component includes:

[0020] A T-shaped strip is located on one side of the static folding strip. One end face of the T-shaped strip is fixedly connected to the bushing, and two limiting pieces are fixedly connected to the other end face of the T-shaped strip. A compensation space is provided between the inner wall of the limiting piece and the compensation sleeve.

[0021] A linkage sleeve is located on one side of the T-shaped strip, and the linkage sleeve is fixedly connected to the compensation sleeve;

[0022] A positioning piece is located on one side inside the linkage sleeve. The top of the positioning piece is fixedly connected to the bushing, and a compensation gap is provided between the positioning piece and one side of the inner wall of the linkage sleeve.

[0023] In a preferred embodiment, a guide rod extends through the inner wall of the linkage sleeve, and the guide rod is fixedly connected to the bushing. The guide rod is used to guide the sliding of the linkage sleeve.

[0024] In a preferred embodiment, a sealing seat is fixedly installed between the two bushings, and a convex shaft is rotatably installed on the inner wall of the sealing seat, with the movable shaft ring inserted into the convex shaft.

[0025] The inner wall of the static sealing ring is in contact with and rotatably connected to the convex shaft rod, and the bushing is rotatably connected to the convex shaft rod.

[0026] The technical effects and advantages of this invention are as follows:

[0027] 1. This invention utilizes a self-compensating sealing mechanism, taking advantage of the negative expansion characteristics of the dynamic and static folding strips made of graphene material. At high temperatures, both contract, with the right end of the dynamic folding strip fixed and limited by a passive collar. The dynamic folding strip drives the compensation insert and dynamic sealing ring to move to the right, while the left end of the static folding strip is fixed by a bushing. The static folding strip drives the compensation sleeve and static sealing ring to move to the left, preventing excessive compression of the dynamic and static sealing rings. At low temperatures, the dynamic and static folding strips expand, with the dynamic folding strip driving the compensation insert to move to the left, which in turn drives the dynamic sealing ring to move to the left, and the static folding strip driving the static sealing ring to move to the right. This brings the dynamic and static sealing rings closer together to compensate for compression. Automatic compensation of the dynamic and static sealing rings can be achieved using temperature, effectively addressing the sealing effects of thermal expansion and contraction caused by temperature changes, restoring normal sealing compression contact, and significantly improving the durability of the double-sided seal of mechanical bearings.

[0028] 2. This invention utilizes a compensating inner limiting component to achieve automatic compensation between the dynamic and static sealing rings based on temperature. At high temperatures, the moving folding strip drives the compensating insert ring to the right. Supported by the moving shaft ring support pillar and the limiting strip, the compensating insert ring is precisely positioned according to the compensation gap, ensuring that the dynamic and static sealing rings compensate according to the specified gap and avoiding excessive compression. At low temperatures, the moving folding strip drives the compensating insert ring to the left, and the positioning strip moves accordingly into the compensation gap. Under the limiting position of the moving shaft ring support pillar and the supporting strip, it precisely shifts to the left at the specified position, allowing the dynamic and static sealing rings to accurately and effectively respond to temperature changes, maintain normal sealing, and significantly improve the durability of the double-sided seal of the mechanical bearing.

[0029] 3. This invention employs a compensation external limiting component. At high temperatures, the static folding strip drives the compensation sleeve to move to the left into the compensation space between it and the limiting plate. The bushing is supported by the bushing, and the T-shaped strip supports the limiting plate for precise positioning. This allows the compensation sleeve to drive the static sealing ring to move to the left to the designated position, ensuring that the dynamic sealing ring and the static sealing ring are compensated according to the specified gap, avoiding excessive compression. At low temperatures, the static folding strip drives the compensation sleeve to move to the right, and the linkage sleeve slides along the guide rod and enters the compensation interval until it contacts the positioning plate. The positioning plate, supported by the bushing, precisely limits the position, allowing the compensation sleeve to drive the static sealing ring to move to the right at the specified interval for compensation. This ensures that the dynamic sealing ring and the static sealing ring are precisely limited, maintaining the sealing state and improving the durability of the double-sided seal of the mechanical bearing. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the mechanical seal structure with double-sided sealing effect of the present invention.

[0031] Figure 2 This is a schematic diagram of the vertical cross-section of the mechanical seal structure with double-sided sealing effect of the present invention.

[0032] Figure 3 This is a partial structural diagram of the vertical cross-section of the connection between the moving shaft collar and the moving folding strip of the present invention.

[0033] Figure 4 This is a partial structural diagram of the vertical cross-section at the connection between the compensation ring and the dynamic sealing ring of the present invention.

[0034] Figure 5 This is a partial structural diagram of the vertical cross-section at the connection between the compensation sleeve and the static sealing ring of the present invention.

[0035] Figure 6 For the present invention Figure 3 Enlarged structural diagram at point A in the middle.

[0036] Figure 7 This is a schematic diagram of a partial section of the structure at the connection between the support column and the support bar of the present invention.

[0037] Figure 8 This is a partial structural diagram of the vertical cross-section at the connection between the compensation sleeve and the static folding strip of the present invention.

[0038] Figure 9 This is a top view of a partial structural diagram of the connection between the linkage sleeve and the T-shaped strip of the present invention.

[0039] The attached figures are labeled as follows: 1. Bushing; 2. Moving collar; 3. Moving folding strip; 4. Compensating ring; 5. Moving sealing ring; 6. Static sealing ring; 7. Compensating sleeve; 8. Static folding strip; 9. Support column; 10. Support bar; 11. Limiting bar; 12. Linkage bar; 13. Positioning bar; 14. Bushing; 15. T-shaped bar; 16. Limiting piece; 17. Linkage sleeve; 18. Positioning piece; 19. Guide rod; 20. Sealing seat; 21. Protruding shaft rod. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] like Figure 1 - Figure 9 The mechanical seal structure shown has a double-sided sealing effect. The mechanical seal structure has a sealing self-compensation mechanism, a compensation inner limit component, and a compensation outer limit component. The arrangement of each mechanism and component can realize automatic compensation of dynamic sealing ring 5 and static sealing ring 6 by utilizing temperature, effectively cope with the sealing effect of thermal expansion and contraction caused by temperature changes, restore normal sealing compression contact, and greatly improve the durability of the double-sided seal of mechanical bearing. The specific structural settings of each mechanism and component are as follows.

[0042] In this embodiment, as Figure 1 - Figure 6 As shown, a self-compensating sealing mechanism is provided on one end face of the moving shaft collar 2. The self-compensating sealing mechanism includes: multiple moving folding strips 3, one end of which is fixedly connected to one end face of the moving shaft collar 2, and the other end of each moving folding strip 3 is fixedly connected to a compensation insert 4; a moving sealing ring 5, fixedly located on one side of the compensation insert 4, and one end of the moving sealing ring 5 rotatably contacts a stationary sealing ring 6; a compensation sleeve 7, fixedly located on one side of the stationary sealing ring 6, and a stationary folding strip 8 is fixedly installed on one side of the compensation sleeve 7, and a bushing 14 is fixedly connected to one end of the stationary folding strip 8. The bushing 14 is fixedly connected to the bushing 1. Both the moving folding strip 3 and the stationary folding strip 8 are compensated by their own thermal expansion and contraction; an inner compensation limiting component, located on one side of the moving folding strip 3, which is used to limit the lateral compensation position of the compensation insert 4; and an outer compensation limiting component, located on one side of the stationary folding strip 8, which is used to limit the lateral compensation position of the compensation sleeve 7. As shown in the figure, multiple movable folding strips 3 and multiple stationary folding strips 8 are arranged in a circumferentially equidistant pattern; the stationary sealing ring 6 slides against the bushing 1. Both the movable folding strips 3 and the stationary folding strips 8 are made of graphene material, and the movable folding strips 3 are bent.

[0043] During use, the high temperature environment can cause thermal expansion between the dynamic sealing ring 5 and the static sealing ring 6. The dynamic folding strip 3 and the static folding strip 8 have negative expansion characteristics. When the dynamic folding strip 3 is exposed to high temperature, it will automatically shrink. The left end of the dynamic folding strip 3 will drive the compensation ring 4 to move to the right, avoiding excessive compression between the dynamic sealing ring 5 and the static sealing ring 6. At the same time, the static folding strip 8 will also shrink automatically when exposed to high temperature. The right end of the static folding strip 8 will drive the compensation sleeve 7 to move to the left, avoiding excessive compression between the static sealing ring 6 and the dynamic sealing ring 5. This achieves automatic high temperature compensation, resulting in better sealing performance and significantly improving the sealing durability of the dynamic sealing ring 5 and the static sealing ring 6.

[0044] In this embodiment, as Figure 3 - Figure 7 As shown, the compensation inner limiting assembly includes: a support column 9, located on one side of the static folding strip 8, one end of the support column 9 is fixedly connected to the dynamic shaft ring 2, and the other end of the support column 9 is fixedly connected to a support strip 10. Limiting strips 11 are fixedly connected to both ends of the support strip 10. A compensation gap is provided between one side of the inner wall of the limiting strip 11 and the dynamic sealing ring 5, and the top of the inner wall of the limiting strip 11 is slidably connected to the compensation insert ring 4; a linkage strip 12, fixedly installed on one side of the outer wall of the support strip 10, with a positioning strip 13 provided on one side of the inner wall of the linkage strip 12. The positioning strip 13 is fixedly connected to the compensation insert ring 4, and a compensation gap is provided between the positioning strip 13 and the inner wall of the linkage strip 12. Multiple support columns 9 are arranged in a circumferentially equidistant distribution, and the vertical cross-sectional shape of the limiting strip 11 is L-shaped. The inner walls of both limiting strips 11 are smooth surfaces, and the upper surface of the positioning strip 13 is parallel to the upper surface of the linkage strip 12.

[0045] In operation, when the moving folding strip 3 moves to the right due to high temperature, causing the compensation ring 4 to contact the inner wall of the limiting strip 11, the support column 9 supports the support strip 10, which in turn supports the two limiting strips 11. This ensures precise compensation between the moving sealing ring 5 and the stationary sealing ring 6 according to the specified compensation gap, significantly improving the accuracy of the compensation limit. In low-temperature environments, when the moving folding strip 3 moves the compensation ring 4 to the left, until the positioning strip 13 contacts the inner wall of the linkage strip 12, the linkage strip 12 remains stationary. The linkage strip 12 precisely limits the leftward movement of the positioning strip 13 to the compensation position, ensuring that the compensation ring 4 drives the moving sealing ring 5 to achieve precise position compensation, significantly improving the compensation accuracy.

[0046] In this embodiment, as Figure 8 - Figure 9As shown, the compensation outer limiting assembly includes: a T-shaped strip 15, located on one side of the static folding strip 8, one end face of the T-shaped strip 15 is fixedly connected to the bushing 14, and two limiting pieces 16 are fixedly connected to the other end face of the T-shaped strip 15, with a compensation space between the inner wall of the limiting piece 16 and the compensation sleeve 7; a linkage sleeve 17, located on one side of the T-shaped strip 15, and fixedly connected to the compensation sleeve 7; and a positioning piece 18, located on the inner side of the linkage sleeve 17, with the top end of the positioning piece 18 fixedly connected to the bushing 1, and a compensation interval between the positioning piece 18 and the inner wall of the linkage sleeve 17.

[0047] In operation, when high temperatures cause the static folding strip 8 to move the compensation sleeve 7 to the left, the bushing 14 is supported by the bushing 1, and the T-shaped strip 15 supports the two limiting plates 16. The compensation sleeve 7 moves the static sealing ring 6 to the left to the designated compensation position, ensuring precise compensation between the dynamic sealing ring 5 and the static sealing ring 6 according to the designated compensation gap, significantly improving the accuracy of compensation. In low-temperature environments, the static folding strip 8 moves the compensation sleeve 7 to the right until one side of the inner wall of the linkage sleeve 17 contacts the left side of the positioning plate 18. The positioning plate 18 precisely limits the compensation interval of the linkage sleeve 17, ensuring that the compensation sleeve 7 moves the static sealing ring 6 to the right according to the designated compensation interval, significantly improving the accuracy of compensation.

[0048] In this embodiment, as Figure 8 - Figure 9 As shown, a guide rod 19 extends through the inner wall of the linkage sleeve 17. The guide rod 19 is fixedly connected to the bushing 14, and the guide rod 19 is used to guide the sliding of the linkage sleeve 17. This allows the linkage sleeve 17 to slide along the outer wall of the guide rod 19, ensuring stable movement of the linkage sleeve 17 and preventing deviation during operation.

[0049] In this embodiment, as Figure 1 - Figure 3 As shown, a sealing seat 20 is fixedly installed between two bushings 1. A convex shaft rod 21 is rotatably installed on the inner wall of the sealing seat 20. The moving shaft ring 2 is inserted into the convex shaft rod 21. The inner wall of the stationary sealing ring 6 is rotatably connected to the convex shaft rod 21. The bushing 14 is rotatably connected to the convex shaft rod 21. This allows the convex shaft rod 21 to rotate inside the sealing seat 20, while simultaneously driving the moving shaft ring 2 to rotate inside the bushing 1. The stationary sealing ring 6 rotates in contact with the convex shaft rod 21, creating a sealing rotation. At the same time, the convex shaft rod 21 rotates within the inner wall of the bushing 14.

[0050] The working principle of the mechanical seal structure with double-sided sealing effect of the present invention is as follows:

[0051] Example 1: Use in high-temperature environments:

[0052] Step 1: During self-compensation sealing, when used in a high-temperature environment, the rotating cam shaft 21 rotates inside the sealing seat 20. Simultaneously, the cam shaft 21 drives the rotating shaft ring 2 to rotate inside the bushing 1, and the rotating shaft ring 2 drives multiple rotating folding strips 3 to rotate. The rotating folding strips 3 drive the compensation insert ring 4 to rotate the rotating sealing ring 5. Thus, the rotating sealing ring 5 will contact the stationary sealing ring 6 to achieve relative rotational sealing. At the same time, the cam shaft 21 rotates in contact with the inner wall of the stationary sealing ring 6, and the bushing 14 can position the cam shaft 21 to achieve stable rotation. Moreover, the two bushings 1 can achieve double-sided sealing treatment for the sealing seat 20 and the cam shaft 21.

[0053] The high temperature environment causes thermal expansion between the dynamic sealing ring 5 and the static sealing ring 6, leading to excessive compression contact between them. Since both the dynamic folding strip 3 and the static folding strip 8 are made of graphene, they exhibit negative expansion characteristics. Therefore, the dynamic folding strip 3 automatically contracts under high temperatures, while its right end is fixed by the passive collar 2. This causes the left end of the dynamic folding strip 3 to move the compensating insert 4 to the right, which in turn moves the dynamic sealing ring 5 to the right, preventing excessive compression contact between the dynamic sealing ring 5 and the static sealing ring 6. Simultaneously, the static folding strip 8 also contracts automatically under high temperatures. Its left end is fixed by the bushing 14, causing the right end of the static folding strip 8 to move the compensating sleeve 7 to the left, which in turn moves the static sealing ring 6 to the left. This prevents excessive compression between the static sealing ring 6 and the dynamic sealing ring 5, achieving compensated compression between them. The static sealing ring 6 and the dynamic sealing ring 5 are restored to normal sealing and compression contact, realizing high-temperature thermal expansion compensation between the dynamic sealing ring 5 and the static sealing ring 6, and avoiding excessive contact between the dynamic sealing ring 5 and the static sealing ring 6.

[0054] Step 2: During the compensation inner limit, when the moving folding strip 3 moves to the right due to high temperature, the compensation ring 4 begins to contact the inner wall of the limit strip 11. The moving shaft ring 2 supports the support column 9, which in turn supports the support strip 10, which in turn supports the two limit strips 11. The compensation ring 4 moves to the right into the compensation gap, thus contacting the inner wall of the limit strip 11. This rightward movement of the compensation ring 4 ensures precise limiting according to the compensation gap, guaranteeing accurate compensation between the moving sealing ring 5 and the static sealing ring 6 according to the specified compensation gap, avoiding over-compensation.

[0055] Step 3: During compensation and external limiting, when the high temperature causes the static folding strip 8 to move the compensation sleeve 7 to the left, the compensation sleeve 7 will move to the left into the compensation space. This compensation space is the space between the compensation sleeve 7 and one side of the inner wall of the limiting piece 16. The bushing 1 supports the bushing 14, the bushing 14 supports the T-shaped strip 15, and the T-shaped strip 15 supports the two limiting pieces 16. In this way, the two limiting pieces 16 can accurately limit the position of the compensation space where the compensation sleeve 7 moves to the left. The compensation sleeve 7 moves the static sealing ring 6 to the left to the designated compensation position, ensuring that the dynamic sealing ring 5 and the static sealing ring 6 are accurately compensated according to the designated compensation gap, avoiding over-compensation.

[0056] Example 2: Use in low-temperature environments:

[0057] Step 1: During self-compensation sealing, in low-temperature environments, the static sealing ring 6 and the dynamic sealing ring 5 will shrink, resulting in reduced pressure between them and decreased sealing performance. Since both the dynamic folding strip 3 and the static folding strip 8 are made of graphene, they exhibit negative expansion characteristics. Therefore, the dynamic folding strip 3 will automatically expand under low temperatures. This causes the right end of the dynamic folding strip 3 to be fixed by the passive shaft collar 2, while the left end of the dynamic folding strip 3 drives the compensation insert 4 to move to the left. The compensation insert 4 then drives the dynamic sealing ring 5 to move to the left, pressing against the right side of the static sealing ring 6. The dynamic sealing ring 5 moves closer to the static sealing ring 6 to compensate for the compression. Simultaneously, the static folding strip 8 automatically expands after being subjected to low temperature, while the left end of the static folding strip 8 is limited and fixed by the bushing 14. In this way, the right end of the static folding strip 8 drives the compensation sleeve 7 to move to the right, and the compensation sleeve 7 drives the static sealing ring 6 to move to the right. The static sealing ring 6 moves to the right and presses against the left side of the dynamic sealing ring 5. In this way, the dynamic sealing ring 5 and the static sealing ring 6 move closer to each other to compensate for the extrusion pressure, realize the compensation extrusion between the static sealing ring 6 and the dynamic sealing ring 5, restore the normal sealing extrusion contact between the static sealing ring 6 and the dynamic sealing ring 5, realize the low temperature cold contraction compensation between the dynamic sealing ring 5 and the static sealing ring 6, and avoid the problem of excessive sealing gap between the dynamic sealing ring 5 and the static sealing ring 6.

[0058] Step 2: During the compensation inner limit, in a low-temperature environment, when the moving folding strip 3 drives the compensation ring 4 to move to the left, the compensation ring 4 will move the positioning strip 13 to the left. The positioning strip 13 moves towards the compensation gap until it contacts the inner wall of the linkage strip 12. In this way, the moving shaft ring 2 supports the support column 9, the support column 9 supports the support strip 10, and the support strip 10 supports the linkage strip 12, keeping the linkage strip 12 stationary. In this way, the compensation ring 4 moves to the left and the compensation gap moves precisely according to the specified position. The linkage strip 12 can accurately limit the compensation position of the positioning strip 13 to the left, ensuring that the compensation ring 4 drives the moving sealing ring 5 to move to the left to compensate according to the specified compensation gap.

[0059] Step 3: During the compensation outer limit, in the low-temperature environment, the static folding strip 8 drives the compensation sleeve 7 to move to the right, and the compensation sleeve 7 drives the linkage sleeve 17 to move to the right. The linkage sleeve 17 slides along the outer wall of the guide rod 19. At the same time, the linkage sleeve 17 moves into the compensation interval until one side of the inner wall of the linkage sleeve 17 contacts the left side of the positioning piece 18. In this way, the bushing 1 supports the positioning piece 18, and the positioning piece 18 achieves precise limiting of the compensation interval for the linkage sleeve 17. Thus, the compensation sleeve 7 drives the static sealing ring 6 to achieve precise limiting of the compensation interval, ensuring that the compensation sleeve 7 drives the static sealing ring 6 to move to the right for compensation according to the specified compensation interval.

[0060] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mechanical seal structure with double-sided sealing effect, comprising a bushing (1), wherein a rotating collar (2) is rotatably mounted on the inner wall of the bushing (1), characterized in that: One end face of the moving shaft collar (2) is provided with a sealing self-compensation mechanism, the sealing self-compensation mechanism comprising: Multiple movable folding strips (3) are fixedly connected at one end to one end face of the movable shaft collar (2), and a compensation insert (4) is fixedly connected at the other end of each movable folding strip (3). A dynamic sealing ring (5) is fixedly located on one side of the compensating ring (4), and one end of the dynamic sealing ring (5) is rotatably in contact with a static sealing ring (6). The compensation sleeve (7) is fixedly located on one side of the static sealing ring (6). A static folding strip (8) is fixedly installed on one side of the compensation sleeve (7). A bushing (14) is fixedly connected to one end of the static folding strip (8). The bushing (14) is fixedly connected to the bushing (1). The dynamic folding strip (3) and the static folding strip (8) are both compensated by their own thermal expansion and contraction. The compensation inner limit component is located on one side of the movable folding strip (3), and the compensation inner limit component is used to limit the lateral compensation position of the compensation interlocking ring (4); The compensation outer limit component is located on one side of the static folding strip (8), and the compensation outer limit component is used to limit the lateral compensation position of the compensation sleeve (7).

2. The mechanical seal structure with double-sided sealing effect according to claim 1, characterized in that: The multiple moving folding strips (3) and the multiple static folding strips (8) are arranged in a circumferentially equidistant distribution; The static sealing ring (6) and the bushing (1) slide against each other.

3. The mechanical seal structure with double-sided sealing effect according to claim 1, characterized in that: Both the dynamic folding strip (3) and the static folding strip (8) are made of graphene material, and the dynamic folding strip (3) is bent.

4. The mechanical seal structure with double-sided sealing effect according to claim 1, characterized in that: The compensation inner limit component includes: The support column (9) is located on one side of the static folding strip (8). One end of the support column (9) is fixedly connected to the dynamic shaft ring (2), and the other end of the support column (9) is fixedly connected to the support strip (10). Both ends of the support strip (10) are fixedly connected to the limit strip (11). A compensation gap is provided between one side of the inner wall of the limit strip (11) and the dynamic sealing ring (5). The top of the inner wall of the limit strip (11) is slidably connected to the compensation insert ring (4). Linkage bar (12) is fixedly installed on one side of the outer wall of support bar (10). Positioning bar (13) is provided on the inner side of linkage bar (12). Positioning bar (13) is fixedly connected to compensation ring (4). Compensation gap is provided between positioning bar (13) and inner wall of linkage bar (12).

5. The mechanical seal structure with double-sided sealing effect according to claim 4, characterized in that: The multiple support pillars (9) are arranged in a circumferentially equidistant distribution, and the vertical cross-sectional shape of the limiting strip (11) is L-shaped.

6. The mechanical seal structure with double-sided sealing effect according to claim 4, characterized in that: The inner walls of the two limiting strips (11) are both smooth surfaces, and the upper surface of the positioning strip (13) is arranged parallel to the upper surface of the linkage strip (12).

7. The mechanical seal structure with double-sided sealing effect according to claim 1, characterized in that: The compensation outer limiting component includes: T-shaped strip (15) is located on one side of static folding strip (8). One end face of the T-shaped strip (15) is fixedly connected to the bushing (14). Two limiting pieces (16) are fixedly connected to the other end face of the T-shaped strip (15). A compensation space is provided between the inner wall of the limiting piece (16) and the compensation sleeve (7). Linkage sleeve (17) is located on one side of T-shaped strip (15), and the linkage sleeve (17) is fixedly connected to compensation sleeve (7); The positioning piece (18) is located on one side inside the linkage sleeve (17). The top of the positioning piece (18) is fixedly connected to the bushing (1). A compensation gap is provided between the positioning piece (18) and one side of the inner wall of the linkage sleeve (17).

8. The mechanical seal structure with double-sided sealing effect according to claim 7, characterized in that: The inner wall of the linkage sleeve (17) is provided with a guide rod (19), which is fixedly connected to the bushing (14). The guide rod (19) is used to guide the linkage sleeve (17) to slide.

9. The mechanical seal structure with double-sided sealing effect according to claim 1, characterized in that: A sealing seat (20) is fixedly installed between the two bushings (1), and a convex shaft rod (21) is rotatably installed on the inner wall of the sealing seat (20). The moving shaft ring (2) is inserted into the convex shaft rod (21). The inner wall of the static sealing ring (6) is in contact with the convex shaft rod (21) and rotates, and the bushing (14) is rotatably connected to the convex shaft rod (21).

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