Dynamic sealing ring end face sealing mechanism
By designing a dynamic sealing ring in the end-face sealing structure and using fluid pressure to promote the sealing ring to move, the problem of traditional end-face sealing structure increasing resistance and sealing surface wear when the sealing body moves, achieving a more stable and reliable sealing effect.
Patent Information
- Application Number
- CN202421627779.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The conventional end-face sealing structure increases movement resistance when the sealing body moves and causes the sealing surfaces to wear each other.
A dynamic sealing mechanism for end-face sealing is designed. By setting a receptacle groove on the A sealing body and connecting it with the fluid channel, the sealing ring is pushed to move along the receptacle groove by using fluid pressure to avoid direct wear on the sealing surface.
It realizes reducing movement resistance when the sealing body moves and extends the service life of the sealing ring, avoiding mutual wear on the sealing surfaces, and the sealing performance is stable and reliable.
Smart Images
Figure CN223049406U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of end face seals, and particularly relates to a dynamic seal ring end face seal mechanism, which is applicable to various devices with the same sealing working conditions such as valves and hatches. Background Art
[0002] End face seal is a sealing form that forms a seal pair by axially compressing an elastic element on the sealing surface, and it is widely used in various rotating equipment and reciprocating equipment.
[0003] As Figure 21 shown, in the traditional end face seal mechanism, a groove is arranged on the end face of the A seal body, and the seal ring is arranged in the groove. The thickness of the seal ring must be greater than the depth of the groove. In this way, by pressing the A seal body, the pressure of the fluid to be sealed can be overcome, and the seal ring can be tightly pressed on the sealing surface of the B seal body for a long time to form a seal; and because the thickness of the seal ring is greater than the depth of the groove, when the B seal body needs to move along the direction shown in the figure, the seal ring still fits with the sealing surface of the B seal body, resulting in not only an increase in the moving resistance of the B seal body when it moves, but also mutual wear between the seal ring and the sealing surface of the B seal body. Summary of the Utility Model
[0004] Aiming at the problems existing in the prior art, through careful research and repeated tests, the utility model provides a dynamic seal ring end face seal mechanism, which solves the problems of moving resistance and mutual wear of the sealing surfaces when the seal bodies need to move relative to each other in the end face seal structure of the prior art.
[0005] Another object of the utility model is to provide a sealing method for the dynamic seal ring end face seal mechanism.
[0006] To achieve the above object, the utility model adopts the following technical solutions.
[0007] A dynamic seal ring end face seal mechanism includes a seal ring, an A seal body, and a B seal body. A receiving groove is arranged on the A seal body, and the seal ring is movably arranged in the receiving groove of the A seal body; a fluid channel is arranged in the A seal body, one end of the fluid channel is communicated with the receiving groove, and the other end of the fluid channel is communicated with a liquid control or gas control system outside the mechanism, so that under the push of the fluid pressure, the seal ring can move back and forth along the receiving groove. At both axial ends of the seal ring, one end is a sealing end, and the other end is a fluid pressure driving end. The end face of the sealing end is a sealing surface, and this sealing surface is correspondingly arranged with the sealing surface of the B seal body; the space surrounded by the fluid pressure driving end and the receiving groove of the A seal body is a fluid pressure working chamber.
[0008] A chamfer is arranged at the edge of the sealing end of the seal ring.
[0009] As a preferred solution of the utility model, the chamfer of the sealing ring is a rounded corner or an oblique angle.
[0010] As a preferred solution of the utility model, the sealing ring is a soft sealing ring made of non-metallic material, or a hard sealing ring made of rigid material.
[0011] As a preferred solution of the utility model, the sealing ring is a composite sealing ring, which is composed of a soft sealing ring and a hard sealing ring. The soft sealing ring is movably arranged on the hard sealing ring to form two or more sealings with soft and hard sealing surfaces arranged alternately.
[0012] As a preferred solution of the utility model, the sealing surface on the B sealing body is a plane structure, or a cambered structure, or a spherical structure.
[0013] As a preferred solution of the utility model, the sealing end of the sealing ring is a plane structure, or a curved surface structure, or a plane structure with a waterline groove, or a curved surface structure with a waterline groove.
[0014] As a preferred solution of the utility model, the fluid pressure driving end of the sealing ring is a planar structure, or a structure with a fluid groove on the end surface.
[0015] As a preferred solution of the utility model, the sealing body A is a single-piece integral structure, or a structure composed of two bodies, or a structure composed of multiple bodies.
[0016] The utility model provides a dynamic sealing ring end face sealing mechanism, and its advantageous technologies and beneficial effects include: 1) The sealing pressure or sealing pressure ratio of the end face sealing pair is controlled by a hydraulic or pneumatic control system outside the mechanism, and the sealing performance is stable and reliable. 2) When the B sealing body moves, the mutual wear of the sealing surfaces can be avoided, which can not only extend the service life of the sealing ring, but also reduce the movement resistance of the B sealing body. 3) The application range is wide, for example, it is suitable for various equipment with the same sealing conditions such as valves and hatches. 4) The sealing end edge of the sealing ring of the utility model is provided with a chamfer, and the pressure of the fluid in the sealed chamber acts on this chamfer structure, which can make the sealing ring subject to force. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model technology is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model technology and are not used to limit the utility model technology.
[0018] Figure 1 It is a structural schematic diagram of embodiment 1 of a dynamic sealing ring end face sealing mechanism of the utility model.
[0019] Figure 2 is Figure 1 a schematic diagram of the end face in a non-sealed state in
[0020] Figure 3 is Figure 1 a schematic diagram of the structure of the sealing ring in
[0021] Figure 4 is Figure 1 another schematic diagram of the structure of the sealing ring in
[0022] Figure 5 is a schematic diagram of the structure of Embodiment 2 of a dynamic sealing ring end face sealing mechanism of the present utility model.
[0023] Figure 6 is Figure 5 another schematic diagram of the structure of the sealing ring in
[0024] Figure 7 is a schematic diagram of the structure of Embodiment 3 of a dynamic sealing ring end face sealing mechanism of the present utility model.
[0025] Figure 8 is Figure 7 a schematic diagram of the end face in a non-sealed state in
[0026] Figure 9 is Figure 7 a schematic diagram of the structure of the sealing ring in
[0027] Figure 10 is a schematic diagram of the structure of Embodiment 4 of a dynamic sealing ring end face sealing mechanism of the present utility model.
[0028] Figure 11 is a schematic diagram of the structure of Embodiment 5 of a dynamic sealing ring end face sealing mechanism of the present utility model.
[0029] Figure 12 is a schematic diagram of the structure of Embodiment 6 of a dynamic sealing ring end face sealing mechanism of the present utility model.
[0030] Figure 13 is Figure 12 a schematic diagram of the structure of the sealing ring in
[0031] Figure 14 is a schematic diagram of the structure of Embodiment 7 of a dynamic sealing ring end face sealing mechanism of the present utility model.
[0032] Figure 15 is a schematic diagram of the structure of Embodiment 8 of a dynamic sealing ring end face sealing mechanism of the present utility model.
[0033] Figure 16 is Figure 15In the C-C cross-sectional view.
[0034] Figure 17 It is a schematic structural diagram of Embodiment 9 of an end-face sealing mechanism for a dynamic sealing ring of the present utility model.
[0035] Figure 18 Is Figure 17 In the C-C cross-sectional view.
[0036] Figure 19 It is a schematic structural diagram of Embodiment 10 of an end-face sealing mechanism for a dynamic sealing ring of the present utility model.
[0037] Figure 20 It is a schematic structural diagram of Embodiment 11 of an end-face sealing mechanism for a dynamic sealing ring of the present utility model.
[0038] Figure 21 It is a schematic structural diagram of a traditional end-face sealing structure in the prior art.
[0039] Markings in the figure: 1. A sealing body; 2. Sealing ring; 3. B sealing body; 4. Soft sealing ring; 5. Hard sealing ring; 6. Fluid channel; 7. Fluid pressure working chamber; 8. Auxiliary sealing ring I; 9. Auxiliary sealing ring II; 10. Intermediate housing; 11. Left housing; 12. Right housing; 13. Fluid in the sealed chamber; 14. Fillet; 15. Chamfer; 16. Sealing end; 17. Fluid pressure driving end. Detailed implementation manners
[0040] The following is a more detailed explanatory description of an end-face sealing mechanism for a dynamic sealing ring of the present utility model with reference to the accompanying drawings. Embodiment 1
[0041] As Figure 1 shown, an end-face sealing mechanism for a dynamic sealing ring includes an A sealing body 1, a sealing ring 2, and a B sealing body 3; the sealing ring 2 is a soft sealing ring made of rubber, or nylon, or polyurethane, or polytetrafluoroethylene, etc., which are relatively soft non-metallic materials.
[0042] As Figure 2 shown, this figure is Figure 1 in the schematic diagram of the non-sealed state of the end face.
[0043] As Figure 3 shown, this figure is Figure 1 in the schematic structural diagram of the sealing ring 2.
[0044] As shown in the schematic diagrams 1, 2, and 3, a receiving groove is provided on the A seal body. The sealing ring 2 is movably arranged in the receiving groove of the A seal body 1. A fluid channel 6 is provided in the A seal body. One end of the fluid channel communicates with the receiving groove, and the other end of the fluid channel communicates with a hydraulic or pneumatic control system outside the mechanism. So that under the push of the fluid pressure, the sealing ring 2 can move back and forth along the receiving groove. At both axial ends of the sealing ring 2, one end is a sealing end 16, and the other end is a fluid pressure driving end 17. The sealing end 16 is a sealing surface, and this sealing surface is arranged corresponding to the sealing surface of the B seal body 3. The sealing surface of the B seal body 3 is a plane; the space surrounded by the fluid pressure driving end 17 and the A seal body 1 receiving groove is a fluid pressure working chamber 7, and the fluid pressure working chamber 7 communicates with a hydraulic or pneumatic control system outside the mechanism through the fluid channel 6 provided on the A seal body 1.
[0045] The edge of the sealing end of the sealing ring 2 is chamfered to a rounded corner 14, that is, the intersection angle between the sealing end of the sealing ring 2 and the inner and outer circular surfaces is a rounded corner structure; a V-shaped fluid groove is provided at the fluid pressure driving end of the sealing ring 2.
[0046] During end face sealing, using the fluid pressure of the hydraulic or pneumatic control system outside the mechanism, the sealing ring 2 is pushed from the fluid pressure driving end 17 of the sealing ring 2 towards the B seal body 3 until the sealing end 16 of the sealing ring 2 is tightly pressed against the sealing surface of the B seal body 3, forming a forced end face sealing pair. Its sealing pressure or sealing specific pressure is controlled by the hydraulic or pneumatic control system outside the mechanism, and under the pressure holding of the hydraulic or pneumatic control system, it meets the long-term sealing requirements of the forced end face sealing pair.
[0047] When the B seal body 3 moves in the direction shown in the figure, its movement process is completed in two steps: First step, first relieve the fluid pressure at the fluid pressure driving end of the sealing ring 2, that is, depressurize the fluid pressure driving end of the sealing ring 2. At the same time, using the reverse pushing effect of the pressure of the fluid 13 in the sealed cavity, reduce the sealing pressure or sealing specific pressure of the end face sealing pair to the lowest; when the thrust generated by the pressure of the fluid 13 in the sealed cavity is greater than the frictional resistance of the movement of the sealing ring 2, it will push the sealing ring 2 along its sealing ring groove towards the direction away from the B seal body 3 until the B seal body 3 and the sealing ring 2 are not in contact. Second step, the B seal body 3 moves and moves into place.
[0048] As Figure 4 shown, this figure is Figure 1 In, another schematic diagram of the structure of the sealing ring 2. The edge of the sealing end of the sealing ring 2 is chamfered to an oblique angle 15, that is, the intersection angle between the sealing end of the sealing ring 2 and the inner and outer circular surfaces is an oblique angle structure. Other specific structures, materials, and functions remain unchanged. Embodiment 2
[0049] As shown in Figure 5, a dynamic seal ring end face sealing mechanism includes a seal body A 1, a seal ring 2, a seal body B 3, a secondary seal ring I 8, and a secondary seal ring II 9; the seal ring 2 is a hard seal ring, made of rigid materials such as copper alloy, or stainless steel, or cemented carbide, or graphite casting, etc.; between the inner and outer circles of the seal ring 2 and the seal body A 1, there are respectively a secondary seal ring I 8 and a secondary seal ring II 9; on the fluid pressure driving end 17 of the seal ring 2, there is a rectangular fluid groove, and for other specific structures and functions, refer to Embodiment 1.
[0050] As Figure 6 shown, this figure is Figure 5 a schematic diagram of another example structure of the seal ring 2 in [description]. The chamfer at the sealing end edge of the seal ring 2 is an inclined angle of 15°, that is, the intersection angle between the sealing end of the seal ring 2 and the inner and outer circle surfaces is an inclined angle structure. Other specific structures, materials, and functions remain unchanged. Embodiment 3
[0051] As Figure 7 shown, a dynamic seal ring end face sealing mechanism includes a seal body A 1, a seal ring 2, a seal body B 3, a secondary seal ring I 8, and a secondary seal ring II 9.
[0052] As Figure 8 shown, this figure is Figure 7 a schematic diagram of the non-sealed state of the end face in [description].
[0053] As Figure 9 shown, this figure is Figure 7 a schematic diagram of the structure of the seal ring 2 in [description], including a soft seal ring 4 and a hard seal ring 5.
[0054] Combined with the schematic Figure 7 、 8 、9 shown, the seal ring 2 is a composite seal ring, composed of a soft seal ring 4 and a hard seal ring 5 combined; the soft seal ring 4 is movably arranged on the hard seal ring 5. One end of the soft seal ring 4 is a sealing end 16, corresponding to the sealing surface of the seal body B 3, and the other end is a fluid pressure driving end 17; one end of the hard seal ring 5 is a sealing end 16, corresponding to the sealing surface of the seal body B 3, and the other end is a fluid pressure driving end 17; the fluid pressure driving end 17 of the soft seal ring 4 is communicated with the fluid pressure driving end 17 of the hard seal ring 5 through a fluid channel arranged on the hard seal ring 5. For other specific structures, materials, and functions of the soft seal ring 4, refer to Embodiment 1; for other specific structures, materials, and functions of the hard seal ring 5, refer to Embodiment 2.
[0055] During end face sealing, the fluid pressure of the hydraulic or pneumatic control system outside the mechanism is utilized. From the fluid pressure driving end of the sealing ring 2, the sealing ring 2 is pushed towards the B sealing body 3 until the sealing end 16 of the sealing ring 2 tightly presses against the sealing surface of the B sealing body 3, forming a forced end face sealing pair with both soft and hard sealing pairs. Its sealing pressure or sealing specific pressure is controlled by the hydraulic or pneumatic control system outside the mechanism, and under the pressure holding of the hydraulic or pneumatic control system, it meets the long-term sealing requirements of the forced end face sealing pair.
[0056] When the B sealing body 3 moves in the direction shown in the figure, its movement process is completed in two steps: First step, first relieve the fluid pressure at the fluid pressure driving end of the sealing ring, that is, relieve the pressure at the fluid pressure driving end of the sealing ring 2. At the same time, utilize the reverse pushing action of the pressure of the fluid 13 in the sealed cavity to reduce the sealing pressure or sealing specific pressure of the end face sealing pair to the lowest; when the thrust generated by the pressure of the fluid 13 in the sealed cavity is greater than the frictional resistance of the movement of the sealing ring 2, it will push the sealing ring 2 along its sealing ring groove towards the direction away from the B sealing body 3 until the B sealing body 3 and the sealing ring 2 are not in contact with each other. Second step, the B sealing body 3 moves and moves into place. Example 4
[0057] As Figure 10 shown, a dynamic sealing ring end face sealing mechanism includes an A sealing body 1, a sealing ring 2, and a B sealing body 3. The sealing ring 2 is a soft sealing ring, made of rubber, or nylon, or polyurethane, or polytetrafluoroethylene, etc., relatively soft non-metallic materials; a V-shaped groove for fluid flow is provided at the fluid pressure driving end of the sealing ring 2; a fluid groove communicating with the V-shaped groove of the sealing ring 2 is also provided on the A sealing body 1. Other specific structures, materials, and functions are the same as those in Example 1. Example 5
[0058] As Figure 11 shown, a dynamic sealing ring end face sealing mechanism includes an A sealing body 1, a sealing ring 2, a B sealing body 3, a secondary sealing ring I 8, and a secondary sealing ring II 9; the fluid pressure driving end of the sealing ring 2 is a planar structure, and a groove for fluid flow is provided on the A sealing body 1 corresponding to the fluid pressure driving end of the sealing ring 2. Other specific structures, materials, and functions are the same as those in Example 2. Example 6
[0059] As Figure 12 shown, a dynamic sealing ring end face sealing mechanism includes an A sealing body 1, a sealing ring 2, a B sealing body 3, a secondary sealing ring I 8, and a secondary sealing ring II 9.
[0060] As Figure 13 shown, this figure is Figure 12 In, the structural schematic diagram of the sealing ring 2, including a soft sealing ring 4 and a hard sealing ring 5.
[0061] Combined schematic Figure 12 and 13 As shown, the sealing ring 2 is a composite sealing ring, which is composed of a soft sealing ring 4 and a hard sealing ring 5. At both axial ends of the sealing ring 2, one end is a sealing end 16, corresponding to the sealing surface of the B sealing body 3; the other end is a fluid pressure driving end 17, and the fluid pressure driving end 17 is a planar structure. On the A sealing body 1, corresponding to the fluid pressure driving end of the sealing ring 2, there is a groove for fluid flow. Other specific structures, materials and functions are the same as those in Embodiment 3. Embodiment 7
[0062] As Figure 14 shown, a dynamic sealing ring end face sealing mechanism includes an A sealing body 1, a sealing ring 2 and a B sealing body 3. The sealing surface of the B sealing body 3 is spherical, and the B sealing body 3 rotates around the center axis of its sealing surface.
[0063] When the sealing ring 2 is a soft sealing ring, other specific structures, materials and functions are the same as those in Embodiment 1 or Embodiment 4.
[0064] When the sealing ring 2 is a hard sealing ring, other specific structures, materials and functions are the same as those in Embodiment 2 or Embodiment 5.
[0065] When the sealing ring 2 is a composite sealing ring, other specific structures, materials and functions are the same as those in Embodiment 3 or Embodiment 6. Embodiment 8
[0066] As Figure 15 shown, a dynamic sealing ring end face sealing mechanism includes an A sealing body 1, a sealing ring 2 and a B sealing body 3.
[0067] As Figure 16 shown, this figure is Figure 15 the C-C sectional view in
[0068] Combined schematic Figure 15 and 16 shown, the sealing ring 2 is a square closed-loop structure. Other specific structures, materials and functions are the same as those in Embodiment 1, or Embodiment 2, or Embodiment 4, or Embodiment 5.
[0069] Similarly, when the sealing ring 2 is a composite sealing ring, the sealing ring 2 can also be set as a square closed-loop structure. Other specific structures, materials and functions are the same as those in Embodiment 3 or Embodiment 6. Embodiment 9
[0070] As Figure 17 shown, a dynamic sealing ring end face sealing mechanism includes an A sealing body 1, a sealing ring 2 and a B sealing body 3.
[0071] As Figure 18 shown, this figure is Figure 17In the C-C sectional view.
[0072] Combined schematic Figure 17 、 18 As shown, the sealing ring 2 is an oval closed-loop structure. For other specific structures, materials and functions, it is the same as in Embodiment 1, or the same as in Embodiment 2, or the same as in Embodiment 4, or the same as in Embodiment 5.
[0073] Similarly, when the sealing ring 2 is a composite sealing ring, the sealing ring 2 can also be set as an oval closed-loop structure. For other specific structures, materials and functions, it is the same as in Embodiment 3, or the same as in Embodiment 6. Embodiment 10
[0074] As shown in Figure 19, a dynamic sealing ring end face sealing mechanism, when used for a ball valve, includes a left housing 11, a right housing 12, an intermediate housing 10, a B sealing body 3 and a sealing ring 2. Compared with Embodiment 7, the B sealing body 3 is the valve ball in the ball valve, and the sealing surface of the B sealing body 3 is a spherical surface; the A sealing body 1 is the valve body in the ball valve, and the valve body is composed of the left housing 11, the right housing 12 and the intermediate housing 10; two sealing rings 2 are provided, which are respectively movably arranged on the left housing 11 and the right housing 12, and are correspondingly arranged on both sides of the valve ball. For other specific structures, materials and functions, it is the same as in Embodiment 7. Embodiment 11
[0075] As Figure 20 shown, a dynamic sealing ring end face sealing mechanism, when used for a gate valve, includes a left housing 11, a right housing 12, an intermediate housing 10, a B sealing body 3 and a sealing ring 2. Compared with Embodiments 1, 2, 3, 4, 5, 6, the B sealing body 3 is the gate plate in the gate valve, the A sealing body 1 is the valve body in the gate valve, and the valve body is composed of the left housing 11, the right housing 12 and the intermediate housing 10; two sealing rings 2 are provided, which are respectively movably arranged on the left housing 11 and the right housing 12, and are correspondingly arranged on both sides of the gate plate. For other specific structures, materials and functions, it is the same as in Embodiment 1, or the same as in Embodiment 2, or the same as in Embodiment 3, or the same as in Embodiment 4, or the same as in Embodiment 5, or the same as in Embodiment 6.
[0076] For the above-mentioned, the installation methods, connection methods or setting methods of all parts are common mechanical connection methods. And, the specific structures, models and parameters, coefficient indexes of all its parts are its own technologies, and as long as they can achieve their beneficial effects, they can be implemented, so this will not be elaborated here.
[0077] For the convenience of description, the drawings in the above text do not limit the structure of the present invention. The term "comprising" is intended to cover non-exclusive inclusion, which includes other elements not expressly listed, or further includes elements inherent to such process, method, article or equipment.
[0078] The above specific description of the present utility model is only for illustrating the present utility model, rather than being limited to the technical solutions described in the embodiments of the present utility model. Those of ordinary skill in the art should understand that the present utility model can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirements are met, they are all within the protection scope of the present utility model.
Claims
1. A dynamic sealing ring end face sealing mechanism, comprising a sealing ring, a sealing body A, and a sealing body B, characterized in that A containing groove is arranged on the A sealing body, and the sealing ring is movably arranged in the containing groove of the A sealing body; a fluid channel is arranged in the A sealing body, one end of the fluid channel is connected to the containing groove, and the other end of the fluid channel is connected to the hydraulic control or gas control system outside the mechanism, so that the sealing ring can move back and forth along the containing groove under the push of the fluid pressure, and the axial ends of the sealing ring are a sealing end at one end and a fluid pressure driving end at the other end, and the end face of the sealing end is a sealing surface, which is arranged corresponding to the sealing surface of the B sealing body; the space enclosed by the fluid pressure driving end and the containing groove of the A sealing body is a fluid pressure working chamber; The sealing end edge of the sealing ring is chamfered; The sealing ring is a non-metallic soft sealing ring or a composite sealing ring; A fluid groove structure is arranged on the end surface of the fluid pressure driving end of the sealing ring.
2. A dynamic sealing ring end face sealing mechanism according to claim 1, characterized in that: The chamfer of the sealing ring is a rounded corner or an oblique angle.
3. A dynamic sealing ring end face sealing mechanism according to claim 1, characterized in that The composite sealing ring is composed of a soft sealing ring and a hard sealing ring. The soft sealing ring is movably arranged on the hard sealing ring to form two or more sealings with soft and hard sealing surfaces arranged alternately.
4. A dynamic seal ring end face sealing mechanism according to claim 1, characterized in that The sealing surface on the B sealing body is a plane structure, or a curved surface structure, or a spherical surface structure.
5. A dynamic seal ring end face seal mechanism according to claim 1, characterized in that The sealing end of the sealing ring is a plane structure, or a curved surface structure, or a plane structure with a waterline groove, or a curved surface structure with a waterline groove.
6. A dynamic seal ring end face seal mechanism according to claim 1, characterized in that The sealing body A is a single-piece integral structure, or a structure composed of two bodies, or a structure composed of multiple bodies.