Elastic mechanical seal

Abstract

The elastic mechanical seal comprises a movable ring, a static ring, a static ring seat and a spring, the static ring seat is sequentially provided with a matching hole and a spring seat in the axial direction, the static ring is in axial sliding clearance fit with the matching hole, and the annular end face, located on one side of the matching hole, of the spring seat serves as the bottom face of the matching hole. The spring seat is sequentially provided with a plurality of axially-arranged inserting holes in the circumferential direction of the static ring, springs are inserted into the inserting holes and guide the springs to elastically stretch out and draw back, medium through holes communicated with the outside are formed in the bottoms of the inserting holes, and the extending ends of the springs abut against the annular end face of the rear side of the static ring. The medium through hole is used for feeding / discharging a medium, and the static ring abuts against the moving ring under the action of the spring to form a dynamic sealing surface; the axial movement change of the static ring of the elastic mechanical seal is better, in addition, the clearance between the static ring seat and the rotating shaft can be reduced, and when a shaft sleeve is arranged, the clearance between the static ring seat and the shaft sleeve can be reduced.

Description

Technical Field

[0001] This invention relates to the field of mechanical sealing devices, specifically an elastic mechanical seal. Background Technology

[0002] Existing mechanical seals generally include a stationary ring seat, a stationary ring, and a rotating ring. The rotating ring is mounted on a shaft and rotates with the shaft. The stationary ring seat is used to fix the stationary ring in place. The rotating ring and the stationary ring abut against each other to form a dynamic sealing surface, thereby adapting to the sealing requirements of the pump. To form a better dynamic sealing surface, existing technology has proposed mechanical seals with springs, referred to in this application as elastic mechanical seals. The spring is located on one side of the stationary ring or the other side of the rotating ring. For example, a mechanical seal disclosed in publication number CN108278368A has a spring installed inside the transmission sleeve, with its two ends respectively connected to the transmission sleeve. The sleeve and transmission card abut against each other, that is, the spring is set on one side of the rotating ring and rotates with the rotating ring. For example, a mechanical seal disclosed in patent announcement number CN103486276B includes a magnetic rotating ring and a stationary ring. At the same time, the spring pulls the rotating ring, thereby controlling the contact force between the rotating ring and the stationary ring, which is conducive to forming a better dynamic sealing surface. Another example is a mechanical seal disclosed in patent announcement number CN105952903B, in which the spring is set on one side of the stationary ring. The spring elastically presses the rotating ring and the stationary ring together to form a better dynamic sealing surface.

[0003] As can be seen from the above, although the addition of springs increases the complexity of the structure and assembly, it is beneficial to use springs to improve the contact state between the stationary ring and the moving ring, thereby facilitating the obtaining of a better dynamic sealing surface.

[0004] However, the applicant believes that existing resilient mechanical seals are not perfect enough. For example, when the spring is placed on the stationary ring side, the stationary ring will inevitably have axial movement changes as the dynamic sealing surface rotates. How to improve the axial movement changes is not currently studied in depth in the existing technology. Moreover, existing resilient mechanical seals mostly use a single spring design. When multiple springs are used, the situation will be different. The applicant will propose a resilient mechanical seal that improves the axial movement changes of the stationary ring. In addition, it is beneficial to reduce the gap between the stationary ring seat and the rotating shaft. When a bushing is included, it is also beneficial to reduce the gap between the stationary ring seat and the bushing. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and propose an elastic mechanical seal that allows for better axial movement of the stationary ring. In addition, it is beneficial to reduce the gap between the stationary ring seat and the rotating shaft. When a bushing is included, it is even more beneficial to reduce the gap between the stationary ring seat and the bushing.

[0006] Compared with existing technologies, this invention proposes an elastic mechanical seal, including a rotating ring, a stationary ring, a stationary ring seat, and a spring. The rotating ring is mounted on a rotating shaft and rotates with the shaft. The stationary ring seat has a mating hole and a spring seat sequentially arranged along the axial direction. The stationary ring and the mating hole are axially slidably fitted with a clearance. The annular end face of the spring seat located on one side of the mating hole serves as the bottom surface of the mating hole. The spring seat has multiple axially arranged insertion holes sequentially arranged along the circumference of the stationary ring. The insertion holes insert springs and guide the springs to elastically extend and retract. The bottom of the insertion holes has a medium passage hole that connects to the outside. The extended end of the spring abuts against the rear annular end face of the stationary ring. When the stationary ring moves and changes along the axial direction of the mating hole, the medium passage hole is used for medium intake / discharge, while the stationary ring abuts against the rotating ring under the action of the spring to form a dynamic sealing surface.

[0007] In some embodiments, a bushing for mounting on a rotating shaft is further included, wherein a rotating ring is provided on one side of the bushing to form a rotating ring portion, and a stationary ring and a stationary ring seat are fitted into the bushing from the other side and the stationary ring abuts against the rotating ring to form a dynamic sealing surface.

[0008] In some embodiments, the bushing has an annular groove on one side, and the moving ring is sleeved on the other side of the bushing and axially inserted into the annular groove to form the moving ring portion.

[0009] In some embodiments, the bushing is configured as a T-shape, with the lateral portion of the T-shape having an annular groove surrounding the bushing.

[0010] In some embodiments, the moving ring is fitted onto the other side of the bushing and axially inserted into the annular groove to form a first assembly. The stationary ring seat is fitted with a spring and the stationary ring to form a second assembly. The second assembly is fitted onto the other side of the bushing to allow the stationary ring and the moving ring to abut against each other to form a dynamic sealing surface.

[0011] In some embodiments, a groove is provided on the other side of the bushing. After the mounting ring and the mounting ring seat are fitted onto the other side of the bushing, a limiting member is installed in the groove to axially limit the mounting ring seat.

[0012] In some embodiments, the gap between the inner peripheral wall of the stationary ring seat, the inner peripheral wall of the stationary ring and the outer peripheral wall of the bushing serves as a transition flow channel. The coolant in the transition flow channel is used to cool the dynamic ring, the stationary ring and the dynamic sealing surface. Furthermore, the bushing has an agitation structure on its outer peripheral wall, and the bushing drives the agitation structure to agitate the coolant and accelerate its flow.

[0013] In some embodiments, the agitation structure employs a plurality of grooves provided on the outer peripheral wall of the bushing, which are sequentially distributed along the outer periphery of the bushing.

[0014] In some embodiments, the stationary ring seat adopts an integrally formed, axially continuous basin-shaped structure, with the bottom of the basin-shaped structure serving as a spring seat.

[0015] In some embodiments, the stationary ring seat has a fitting opening on the rotating ring side, and the rotating ring is axially fitted with the fitting opening. In cases where there is a rotating ring portion, the rotating ring portion is axially fitted with the fitting opening.

[0016] Compared with the prior art, the present invention has the following advantages after adopting the above structure: This disclosure improves the single spring design into a multiple spring design. The multiple spring design is not simply an increase in the number of springs, but rather a further improvement by incorporating insertion holes and medium passage holes to form independent working cavities. This not only makes the working structures of each spring relatively independent, reducing mutual influence, but also, because the medium passage holes are directly located at the bottom of the insertion holes, in the direction of spring movement, the medium passage holes respond quickly to medium intake / discharge, thus improving the spring's responsiveness. Furthermore, combined with the axially sliding clearance fit between the stationary ring and the mating hole, and the multiple spring design, the stationary ring can better adapt to changes in the dynamic contact surface caused by the relative rotation of the moving and stationary rings when its axial movement changes. Therefore, this disclosure improves the axial movement variation of the stationary ring.

[0017] Furthermore, because an independent working chamber is provided and the medium passage hole is directly located at the bottom of the insertion hole, there is no need to rely on the gap between the stationary ring seat and the rotating shaft for medium intake / discharge. Similarly, when a bushing is present, there is no need to rely on the gap between the stationary ring seat and the bushing for medium intake / discharge. Therefore, this disclosure facilitates reducing the gap between the stationary ring seat and the rotating shaft, and when a bushing is present, it further facilitates reducing the gap between the stationary ring seat and the bushing. Reducing the gap provides a technical basis for manufacturing small-gap structural solutions.

[0018] In particular, because it has an independent working chamber and the medium passage is located directly at the bottom of the insertion hole, the diameter of the medium passage can also be made smaller.

[0019] In particular, this disclosure improves upon the previous one by reducing the influence of the inlet / outlet medium to a very low level. Therefore, when optimizing the structure, the spring can be the main influencing factor. By selecting springs with different stiffnesses, a more detailed optimization of the interaction between the moving and stationary rings can be achieved, thus providing a technical means for further research. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of an elastic mechanical seal disclosed herein from a frontal view.

[0021] Figure 2 This is a three-dimensional schematic diagram of an elastic mechanical seal disclosed herein from a rear-view perspective.

[0022] Figure 3 This is a right view of an elastic mechanical seal disclosed herein.

[0023] Figure 4 This is a sectional view along axis AA.

[0024] Figure 5 This is a right view of a stationary ring seat disclosed herein.

[0025] Figure 6 This is a sectional view along the BB direction.

[0026] Figure 7 This is a three-dimensional schematic diagram of a static ring seat disclosed herein from a frontal view.

[0027] Figure 8 In order to be in Figure 7 A three-dimensional schematic diagram of the base after installing springs and anti-rotation pins.

[0028] Figure 9 This is a three-dimensional schematic diagram of a stationary ring from a rearward perspective.

[0029] Figure 10 This is a three-dimensional schematic diagram of another type of resilient mechanical seal disclosed herein, in partial cross-section.

[0030] Figure 11 for Figure 10 The diagram shows a three-dimensional view of the bushing of the elastic mechanical seal in partial cross-section.

[0031] The attached diagram shows the following reference numerals: 1-Dynamic ring, 2-Static ring, 3-Static ring seat, 4-Spring, 5-Matching hole, 6-Spring seat, 7-Annular end face, 8-Insertion hole, 9-Medium passage hole, 10-Rear annular end face, 11-Dynamic sealing surface, 12-Shaft sleeve, 13-Dynamic ring part, 14-Annular groove, 15-Transverse part, 16-Slot, 17-Limiting element, 18-Sealing ring, 19-Anti-rotation pin, 20-Matching groove, 21-Piece fitting opening, 22-Transition flow channel, 23-Groove. Detailed Implementation

[0032] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The embodiments described below are merely examples, and other obvious variations will arise for those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0033] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0034] like Figures 1 to 9 The image shows an elastic mechanical seal that can be used for pump shaft sealing. When applied to a pump, the rotating ring 1 is mounted on the shaft and rotates with the shaft, while the stationary ring seat 3 is fixed to the pump body or other parts to secure the stationary ring seat 3.

[0035] Regarding the specific structural scheme for mounting the rotating ring 1 on the rotating shaft and rotating it together with the rotating shaft, the rotating ring 1 can be directly mounted on the rotating shaft, or a bushing 12 can be set separately, with the bushing 12 mounting the rotating ring 1, and the bushing 12 mounted on the rotating shaft, thus forming an indirect mounting of the rotating ring 1 on the rotating shaft and rotating it together with the rotating shaft.

[0036] like Figure 4 , 6 As shown in Figures 7, 8, and 9, the basic structure of the elastic mechanical seal includes a rotating ring 1, a stationary ring 2, a stationary ring seat 3, and a spring 4. The stationary ring seat 3 has a mating hole 5 and a spring seat 6 arranged sequentially along the axial direction. The stationary ring 2 and the mating hole 5 are axially slidably fitted with a clearance. The annular end face 7 of the spring seat 6, located on one side of the mating hole 5, serves as the bottom surface of the mating hole 5. The spring seat 6 has multiple axially arranged insertion holes 8 arranged sequentially along the circumference of the stationary ring 2. The insertion holes 8 insert the spring 4 and guide it to elastically expand and contract. The bottom of the insertion holes 8 has a medium passage hole 9 connecting to the outside. The extended end of the spring 4 abuts against the rear annular end face 10 of the stationary ring 2. When the stationary ring 2 moves axially along the mating hole 5, the medium passage hole 9 is used for medium intake / discharge, while the stationary ring 2, under the action of the spring 4, abuts against the rotating ring 1 to form a dynamic sealing surface 11. The medium is, for example, air.

[0037] In this example, as Figure 4 , 6 As shown, in order to better guide the spring 4, the axial length of the insertion hole 8 is set to be relatively long, and most of the spring 4 is inserted in it, thereby better controlling the movement of the spring 4. In addition, since a medium passage hole 9 connecting to the outside is provided at the bottom of the insertion hole 8, the axial length of the insertion hole 8 can be set to be relatively long. In other words, due to the setting of the medium passage hole 9, the axial length of the insertion hole 8 is set to be relatively long without causing the problem of blockage, thereby avoiding the adverse effects of blockage.

[0038] In some embodiments, such as Figure 4 As shown, a sealing ring 18 is provided between the outer circumferential surface of the stationary ring 2 and the inner circumferential surface of the mating hole 5. The sealing ring 18 and the outer circumferential surface of the stationary ring 2 are radially elastically abutted. In this way, on the one hand, the sealing ring 18 achieves a sealing function, and on the other hand, in particular, the sealing ring 18 provides radial elastic movement for the stationary ring 2. Therefore, by further combining the multiple spring designs and the independent working cavity design of this disclosure, it is possible to better adapt to the changes in the dynamic contact surface caused by the relative rotation of the moving ring and the stationary ring.

[0039] In some embodiments, to enhance the ease of use of this disclosure, such as Figure 1 , 2 As shown in Figure 4, this disclosure is designed as a cartridge-type elastic mechanical seal. Specifically, it also includes a shaft sleeve 12, on one side of which a rotating ring 1 is provided to form a rotating ring portion 13. A stationary ring 2 and a stationary ring seat 3 are fitted onto the other side of the shaft sleeve 12, and the stationary ring 2 abuts against the rotating ring 1 to form a dynamic sealing surface 11. In this way, with the shaft sleeve 12 as the structural carrier, before this disclosure is installed on the pump, the relevant structures of this disclosure are all assembled together rather than separately. When it needs to be installed on the pump, this disclosure can be fitted onto the rotating shaft as a whole, and the shaft sleeve 12 and the stationary ring seat 3 can be connected and fixed respectively. The specific connection and fixing can adopt existing technology, which will not be described in detail.

[0040] Furthermore, in order to improve assembly precision and convenience, such as Figure 4 As shown, the bushing 12 has an annular groove 14 on one side, and the moving ring 1 is sleeved from the other side of the bushing 12 and axially inserted into the annular groove 14 to form a moving ring portion 13.

[0041] Furthermore, in order to further improve assembly precision, such as Figure 4 As shown, the bushing 12 is T-shaped, and the transverse portion 15 of the T-shape is provided with an annular groove 14 surrounding the bushing 12.

[0042] In some embodiments, to further simplify assembly and improve the ease of assembly of this disclosure, such as Figure 1 , 2 As shown in Figure 4, the moving ring 1 is fitted into the annular groove 14 from the other side of the bushing 12 and axially inserted to form the first component. The stationary ring seat 3 is fitted with the spring 4 and the stationary ring 2 to form the second component. The second component is fitted into the bushing 12 from the other side so that the stationary ring 2 and the moving ring 1 abut against each other to form a dynamic sealing surface 11.

[0043] In some embodiments, to prevent the stationary ring seat 3 from axially separating from the bushing 12, or the first and second components from axially separating, before installing this disclosure on the pump, such as Figure 2 , 4As shown, a groove 16 is provided on the other side of the bushing 12. After the mounting ring 2 and the mounting ring seat 3 are fitted onto the bushing 12 from the other side, a limiting member 17 is installed in the groove 16 to axially limit the mounting ring seat 3. In this way, the mounting ring seat 3 cannot be separated from the bushing 12 in the opposite axial direction. In other words, the first component and the second component cannot be separated from each other in the opposite axial direction.

[0044] In some embodiments, such as Figure 8 , 9 As shown, the spring seat 6 has an anti-rotation pin 19 on one side of the mating hole 5, and the rear annular end face 10 of the stationary ring 2 has a mating groove 20. The anti-rotation pin 19 is axially inserted into the mating groove 20 to prevent the stationary ring 2 from rotating together with the moving ring 1. In this way, on the one hand, the stationary ring 2 is better assembled on the stationary ring seat 3, and on the other hand, in the working state, it helps to avoid the stationary ring 2 rotating too much, which would prevent the spring 4 from working properly.

[0045] In some embodiments, such as Figure 4 , 6 As shown, the stationary ring seat 3 has a fitting opening 21 on one side of the rotating ring 1. The rotating ring 1 is axially fitted with the fitting opening 21. In the case where there is a rotating ring portion 13, the rotating ring portion 13 is axially fitted with the fitting opening 21. This helps to improve the overall integrity and compactness of this disclosure. Figure 1 , 2 As shown in Figure 4, this disclosure is short, compact, and has good overall integrity.

[0046] In some embodiments, such as Figure 4 , 6 As shown, the stationary ring seat 3 adopts an integrally formed, axially continuous basin-shaped structure, with the bottom of the basin-shaped structure serving as the spring seat 6. This design improves the overall integrity and compactness of the present invention and also facilitates manufacturing.

[0047] In some embodiments, such as Figure 10 , 11 As shown, another type of elastic mechanical seal is proposed, in which the medium is liquid, namely coolant. The interval between the inner peripheral wall of the stationary ring seat 3, the inner peripheral wall of the stationary ring 2 and the outer peripheral wall of the bushing 12 serves as a transition flow channel 22. The coolant in the transition flow channel 22 is used to cool the dynamic ring 1, the stationary ring 2 and the dynamic sealing surface 11. Furthermore, the bushing 12 is provided with an agitation structure on its outer peripheral wall. The bushing 12 drives the agitation structure to agitate the coolant and accelerate its flow. Figure 10 The arrows in the diagram indicate the approximate flow of the coolant.

[0048] Thus, during assembly, the transition channel 22 formed serves as a liquid cooling channel. In other words, the liquid cooling channel is formed through the fitting between the bushing 12 and the stationary ring seat 3. Furthermore, the bushing 12 has an agitation structure on its outer peripheral wall. The bushing 12 drives the agitation structure to agitate the coolant and accelerate its flow. The agitation structure is installed synchronously with the fitting between the bushing 12 and the stationary ring seat 3. Therefore, it is not only convenient for assembly, but also has a better active cooling effect because the agitation structure on the outer peripheral wall of the bushing 12 agitates the coolant in the gap. Since the gap causes the coolant to be in a layered state, the agitation effect is better.

[0049] Although the medium is coolant, the spring seat 6 has multiple axially arranged insertion holes 8 sequentially arranged along the circumference of the stationary ring 2. The insertion holes 8 insert springs 4 and guide them to elastically expand and contract. The bottom of the insertion holes 8 is provided with a medium passage hole 9 that connects to the outside. The protruding end of the spring 4 abuts against the rear annular end face 10 of the stationary ring 2. When the stationary ring 2 moves axially along the mating hole 5, the medium passage hole 9 is used for medium intake / discharge, while the stationary ring 2 abuts against the moving ring 1 under the action of the spring 4 to form a dynamic sealing surface 11. This helps to reduce the mutual influence between the liquid cooling channel and the stationary ring 2 moving axially along the mating hole 5, thus forming an elastic mechanical seal under a new technical approach.

[0050] The inner circumferential walls of the stationary ring seat 3 and the stationary ring 2, and the outer circumferential wall of the bushing 12 are connected by a sleeve to form a cylindrical annular space, which serves as a transition flow channel 22. This facilitates the smooth flow of coolant and allows for the containment of more coolant.

[0051] like Figure 10 , 11 As shown, the agitation structure employs multiple grooves 23 on the outer peripheral wall of the bushing 12, which are sequentially distributed along the outer periphery of the bushing 12. In this way, on the one hand, the grooves 23 can be used to increase the volume, facilitating the holding of more coolant, without significantly altering the spacing between them; on the other hand, the grooves 23 have a simple structure, making them easy to machine on the outer peripheral wall of the bushing 12; and furthermore, the grooves 23 do not protrude, facilitating easy assembly between the bushing 12 and the stationary ring seat 3.

[0052] Furthermore, the groove 23 is configured to extend axially along the bushing 12. This provides a better stirring effect and coverage.

[0053] When understanding this disclosure, the above structure may be referred to other embodiments / appendices if necessary. Figure 1 And that is understood, so I will not elaborate further here.

[0054] The above description is merely an illustrative embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features, and principles described in the scope of protection of the present invention are included within the scope of protection of the present invention.

Claims

1. A resilient mechanical seal, comprising a rotating ring (1), a stationary ring (2), a stationary ring seat (3), and a spring (4), wherein the rotating ring (1) is mounted on a rotating shaft and rotates with the rotating shaft, characterized in that, The stationary ring seat (3) is provided with a mating hole (5) and a spring seat (6) in sequence along the axial direction. The stationary ring (2) and the mating hole (5) are axially slidably fitted with a clearance. The annular end face (7) of the spring seat (6) located on one side of the mating hole (5) serves as the bottom surface of the mating hole (5). The spring seat (6) is provided with multiple axially arranged insertion holes (8) in sequence along the circumference of the stationary ring (2). The insertion holes (8) are used to insert springs (4) and guide springs (4) to elastically extend and retract. The bottom of the insertion holes (8) is provided with a medium passage hole (9) that connects to the outside. The protruding end of the spring (4) abuts against the rear annular end face (10) of the stationary ring (2). When the stationary ring (2) moves and changes along the axial direction of the mating hole (5), the medium passage hole (9) is used to feed / discharge the medium. Under the action of the spring (4), the stationary ring (2) abuts against the moving ring (1) to form a dynamic sealing surface (11).

2. The elastic mechanical seal as described in claim 1, characterized in that, It also includes a bushing (12) for mounting on a rotating shaft, wherein a rotating ring (1) is provided on one side of the bushing (12) to form a rotating ring portion (13), and a stationary ring (2) and a stationary ring seat (3) are fitted into the bushing (12) from the other side and the stationary ring (2) abuts against the rotating ring (1) to form a dynamic sealing surface (11).

3. The elastic mechanical seal as described in claim 2, characterized in that, The bushing (12) has an annular groove (14) on one side, and the moving ring (1) is fitted into the bushing (12) from the other side and axially inserted into the annular groove (14) to form the moving ring part (13).

4. The elastic mechanical seal as described in claim 3, characterized in that, The bushing (12) is configured as a T-shape, and the transverse portion (15) of the T-shape is configured with an annular groove (14) around the bushing (12).

5. The elastic mechanical seal as described in claim 3, characterized in that, The moving ring (1) is fitted into the annular groove (14) from the other side of the bushing (12) and axially inserted to form the first component. The stationary ring seat (3) is fitted with the spring (4) and the stationary ring (2) to form the second component. The second component is fitted into the bushing (12) from the other side so that the stationary ring (2) and the moving ring (1) abut against each other to form a dynamic sealing surface (11).

6. The resilient mechanical seal as described in claim 2, 3, 4, or 5, characterized in that, The gap between the inner peripheral wall of the stationary ring seat (3), the inner peripheral wall of the stationary ring (2), and the outer peripheral wall of the bushing (12) serves as a transition flow channel (22). The coolant in the transition flow channel (22) is used to cool the moving ring (1), the stationary ring (2), and the dynamic sealing surface (11). Furthermore, the bushing (12) has an agitation structure on its outer peripheral wall. The bushing (12) drives the agitation structure to agitate the coolant and accelerate its flow.

7. The elastic mechanical seal as described in claim 6, characterized in that, The agitation structure employs multiple grooves (23) on the outer peripheral wall of the bushing (12), which are sequentially distributed along the outer periphery of the bushing (12).

8. The resilient mechanical seal as described in claim 2, 3, 4, or 5, characterized in that, A slot (16) is provided on the other side of the bushing (12). After the mounting ring (2) and the ring seat (3) are fitted from the other side of the bushing (12), a limiting member (17) is installed in the slot (16) to axially limit the ring seat (3).

9. The resilient mechanical seal as described in claim 1 or 2, characterized in that, The stationary ring seat (3) adopts an integral basin-shaped structure that is axially continuous, and the bottom of the basin-shaped structure serves as a spring seat (6).

10. The resilient mechanical seal as described in claim 1, 2, or 3, characterized in that, The stationary ring seat (3) has a fitting port (21) on one side of the moving ring (1). The moving ring (1) and the fitting port (21) are axially fitted together. In the case of a moving ring part (13), the moving ring part (13) and the fitting port (21) are axially fitted together.

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