Sealing ring with bee groove end face and mechanical sealing device
By designing the bee groove structure on the sealing end surface of the sealing ring, the problem of poor fluid dynamic pressure effect of the existing mechanical sealing devices is solved, and a stronger fluid dynamic pressure effect and more stable sealing operation is achieved.
Patent Information
- Application Number
- CN202420483661.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-03-12
AI Technical Summary
The fluid dynamic pressure effect of existing mechanical sealing devices is poor, resulting in unstable seal operation.
A sealing ring with the end face of the bee groove is designed. The bee groove has an axisymmetric shape, which imitates the shape of the bee wings and forms a dual-channel structure to enhance the fluid dynamic pressure effect.
By imitating the structural design of bee wings, the sealing ring can form a strong fluid dynamic pressure effect, improve the bearing capacity and stability of the sealing ring, make the sealing device easy to open quickly at low speeds, and has a more stable air film.
Smart Images
Figure CN222437020U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical seals, in particular to a sealing ring with a honeycomb end face and a mechanical seal device. Background Art
[0002] Mechanical seals are widely used as dynamic seals for rotating shafts. They usually include a stationary ring (stationary ring), a rotating ring (dynamic ring), a stationary ring seat, a sleeve, a push ring, a spring, etc. Mechanical seals can be divided into contact and non-contact types. The non-contact type has higher stability and longer service life. According to the direction of rotation, they can be divided into single-direction and double-direction. A typical way to achieve non-contact operation of the sealing surface is to use the fluid dynamic pressure effect formed by the flow of the medium between the sealing surfaces to generate the corresponding fluid film opening force and fluid film stiffness, so that the two sealing end faces are separated by the fluid film to achieve non-contact operation.
[0003] Improving the surface structure of the sealing end face is an effective technical means to enhance its fluid dynamic pressure effect. At present, usually on one or both sides of the two sealing end faces of the static ring and the dynamic ring, a groove with a certain depth and shape is opened, among which the most typical ones are spiral grooves with equal groove depth for single rotation and "T" grooves for double rotation. However, the fluid dynamic pressure effect of the above sealing end face structure is not good. Utility Model Content
[0004] The utility model provides a sealing ring with a honeycomb groove end face and a mechanical sealing device, which can enhance the dynamic pressure effect of the end face fluid to increase the end face fluid film bearing capacity, thereby improving the sealing operation stability.
[0005] The utility model is realized by the following technical solutions:
[0006] In the first aspect, the utility model provides a sealing ring with a bee groove end face, the sealing ring includes a sealing end face, a plurality of bee grooves are arranged on the sealing end face, and the bee grooves are evenly arranged around the center of the sealing end face; wherein the shape of the bee groove is the orthographic projection obtained by looking down from the back when the wings of a bee are in an open state, the bee groove is an axisymmetric shape and the axis thereof passes through the center of the sealing end face, and the head of the bee groove contacts the outer edge of the sealing end face to form a medium inlet.
[0007] Furthermore, the bee slot includes a body slot, a front wing slot and a hind wing slot, the slot depth of the body slot is not less than the slot depth of the front wing slot, and the slot depth of the front wing slot is not less than the slot depth of the hind wing slot.
[0008] Furthermore, the groove depths of the body groove, forewing groove and hind wing groove gradually change from deep to shallow from the middle of the body groove to the forewing groove and the hind wing groove, and the groove depths of the body groove, forewing groove and hind wing groove gradually change from deep to shallow from the outer circle to the inner circle along the radial direction of the sealing ring.
[0009] Furthermore, the groove depth of the body groove ranges from 6 to 20 microns, the groove depth of the forewing groove ranges from 6 to 16 microns, and the groove depth of the hind wing groove ranges from 6 to 14 microns.
[0010] Furthermore, the ratio of the area of all the honeycombs to the sealing end surface is 0.2-0.3.
[0011] Furthermore, the number of the bee slots is not less than four.
[0012] In a second aspect, the utility model provides a mechanical sealing device, comprising a sealing ring having a honeycomb groove end face as described above.
[0013] Furthermore, the mechanical sealing device includes a dynamic ring, a static ring and an elastic compensation mechanism, the dynamic ring abuts against the static ring, at least one of the dynamic ring and the static ring is a sealing ring as described above, and the elastic compensation mechanism is suitable for providing elastic compensation for the dynamic ring or the static ring.
[0014] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0015] The utility model discloses a sealing ring with a bee groove end face, and the sealing end face of the sealing ring has a plurality of bee grooves, which imitate the back top view shape of the wings of a bee when unfolded, can realize bidirectional rotation, and can form a strong fluid dynamic pressure effect. Each bee groove is an axisymmetric structure with a dual-channel structure, which can produce a stronger guiding effect and pumping effect on the gas, so that the fluid converges at the groove root of the bee groove and is sheared and squeezed, forming a sufficient dynamic pressure effect, further improving the bearing capacity of the end face, so that the end face is easy to open quickly at low speed. At the same time, the bee groove has a wider groove root outlet, and has a more stable air film under the same film thickness. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:
[0017] Figure 1 It is a schematic structural diagram of a sealing ring with a bee groove end face according to an embodiment of the utility model;
[0018] Figure 2 It is a schematic diagram of the structure of the mechanical sealing device in the example of the present utility model.
[0019] Marks and corresponding parts names in the attached drawings:
[0020] 100-sealing ring;
[0021] 10-sealing end face;
[0022] 20-bee slot; 21-body slot; 211-medium inlet; 22-front wing slot; 23-hind wing slot;
[0023] 31-static ring; 32-dynamic ring; 33-dynamic ring seat; 34-anti-rotation pin; 35-static ring seat; 36-spring; 37-push ring; 38-pressure sleeve; 39-sealing ring; 40-tolerance ring; 41-rotating shaft. DETAILED DESCRIPTION
[0024] As described in the background technology, improving the surface structure of the sealing end face is an effective technical means to enhance its fluid dynamic pressure effect. At present, a groove with a certain depth and shape is usually opened on one or both sides of the two sealing end faces of the static ring and the dynamic ring. Among them, the most typical ones are spiral grooves with equal groove depth for single rotation and "T" grooves for double rotation. However, the fluid dynamic pressure effect of the above sealing end face structure is not good.
[0025] Based on this, the inventor created the sealing ring with a bee groove end face of the present application to solve the above technical problems.
[0026] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.
[0027] Example
[0028] First, see Figure 1The utility model provides a sealing ring 100 having a bee slot 20 end face, the sealing ring 100 includes a sealing end face 10, and a plurality of bee slots 20 are arranged on the sealing end face 10, and the bee slots 20 are evenly arranged around the center of the sealing end face 10. For example, the sealing ring 100 can be a static ring or a dynamic ring in a mechanical seal, and the utility model is not limited thereto. Among them, the shape of the bee slot 20 is the orthographic projection obtained by looking down from the back when the wings of a bee are in an open state, the bee slot 20 is an axisymmetric shape and the axis thereof passes through the center of the circle of the sealing end face 10, and the head of the bee slot 20 abuts against the outer edge of the sealing end face 10 and forms a medium inlet 211. The bee slot 20 is an axisymmetric structure, and through the symmetrical bidirectional bee slot 20 design, a strong fluid dynamic pressure effect can be formed during bidirectional rotation. Among them, the number of the bee slots 20 can be no less than four (for example, the number of the bee slots 20 can be 4-32, preferably 12). For example, the medium inlet 211 may be fed with a liquid medium or a gaseous medium, but the present invention is not limited thereto.
[0029] The utility model discloses a sealing ring 100 with a bee groove 20 end face, and the sealing end face 10 of the sealing ring 100 has a plurality of bee grooves 20, which imitate the back top view shape of the wings of a bee when unfolded, can realize bidirectional rotation, and can form a strong fluid dynamic pressure effect. Each bee groove 20 is an axisymmetric structure with a dual-channel structure, which can produce a stronger guiding effect and pumping effect on the gas, so that the fluid converges at the groove root of the bee groove 20 and is sheared and squeezed, forming a sufficient dynamic pressure effect, further improving the bearing capacity of the end face, so that the end face is easy to open quickly at low speed. At the same time, the bee groove 20 has a wider groove root outlet, and has a more stable air film under the same film thickness.
[0030] In another embodiment, the honey bee slot 20 includes a body slot 21, a front wing slot 22, and a hind wing slot 23, the slot depth of the body slot 21 is not less than the slot depth of the front wing slot 22, and the slot depth of the front wing slot 22 is not less than the slot depth of the hind wing slot 23. For example, the body slot 21, the front wing slot 22, and the hind wing slot 23 can be flat-bottomed or curved-bottomed, and the present invention is not limited thereto.
[0031] In another embodiment, the groove depth of the body groove 21, the front wing groove 22, and the rear wing groove 23 gradually changes from deep to shallow from the middle of the body groove 21 to the front wing groove 22 and the rear wing groove 23, and the groove depth of the body groove 21, the front wing groove 22, and the rear wing groove 23 also gradually changes from deep to shallow from the outer circle to the inner circle along the radial direction of the sealing ring 100. In this way, more medium can be pumped into the medium inlet 211 on the outside, and then the medium shearing and squeezing effect is formed at the transition between the body groove 21 and the front wing groove 22 and the rear wing groove 23, and at the transition between the front wing groove 22 and the rear wing groove 23 and the end surface, thereby forming a sufficient dynamic pressure effect.
[0032] In another embodiment, the groove depth of the body groove 21 is in the range of 6-20 microns, the groove depth of the front wing groove 22 is in the range of 6-16 microns, and the groove depth of the hind wing groove 23 is in the range of 6-14 microns. A preferred combination is: the groove depth of the body groove 21 is 10 microns, the groove depth of the front wing groove 22 is 8 microns, and the groove depth of the hind wing groove 23 is 6 microns.
[0033] In another embodiment, the area of all the honeycomb grooves 20 accounts for 0.2-0.3 of the sealing end face 10. In this way, the ratio of the circumferential groove area to the weir area (the part between the honeycomb grooves 20 on the circumference of the sealing ring 100) can be controlled to be 0.6-1.5, and the ratio of the radial groove area to the dam area (the part between the inner ring of the sealing ring 100 and the honeycomb grooves 20) can be controlled to be 1.2-0.8, ensuring that the end face has sufficient medium to form a dynamic pressure effect while controlling the leakage amount not to exceed the standard.
[0034] Second, see Figure 2 The utility model provides a mechanical sealing device, including the sealing ring 100 having the end face of the honeycomb groove 20 as described above.
[0035] In another embodiment, the mechanical sealing device includes a dynamic ring, a static ring and an elastic compensation mechanism, the dynamic ring abuts against the static ring, at least one of the dynamic ring and the static ring is the sealing ring 100 as described above, and the elastic compensation mechanism is suitable for providing elastic compensation for the dynamic ring or the static ring.
[0036] The present mechanical sealing device is described below by means of a specific example.
[0037] Will Figure 1 The sealing ring 100 is installed as the dynamic ring 32 in a specific mechanical sealing device, see Figure 2As shown, the stationary ring 31 is a floating ring. The dynamic ring seat 33 is a sleeve structure; the dynamic ring seat 33 is radially sleeved on the outer cylindrical surface of the rotating shaft 41 with its inner hole surface, axially contacts the step surface at the shoulder of the rotating shaft 41, and is fixedly connected to the rotating shaft 41 in the circumferential direction and rotates synchronously. The dynamic ring 32 is radially expanded on the outer circumferential surface of the dynamic ring seat 33 by the tolerance ring 40, axially contacts the step surface of the dynamic ring seat 33 and is axially compressed by the compression sleeve 38, and is fixedly connected to the dynamic ring seat 33 in the circumferential direction and rotates synchronously. Therefore, the dynamic ring 32 can rotate synchronously with the dynamic ring seat 33 and the rotating shaft 41. The stationary ring 31 and the dynamic ring 32 are coaxially arranged opposite to each other, and their opposite end faces are sealing surfaces. The stationary ring 31 is radially sleeved on the stationary ring seat 35 and remains relatively still with the stationary ring seat 35. It is supported by the push ring 37 and the spring 36 in the axial direction and is positioned by the anti-rotation pin 34 in the circumferential direction, so that the stationary ring 31 can only float freely in the axial direction and cannot rotate with the rotating shaft 41. A sealing ring 39 is installed on the inner diameter side of the push ring 37 that contacts the stationary ring 31 and seals with the stationary ring seat 35. After running this set of mechanical sealing devices, it was found that this set of equipment has lower leakage than ordinary spiral grooves, can rotate forward and reverse, and can generate a stronger air film opening force, so that the sealing device can also produce a better fluid dynamic pressure effect when rotating at a low speed.
[0038] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A sealing ring having a bee groove end face, characterized in that: The sealing ring includes a sealing end face, on which a plurality of honeycombs are arranged, and the honeycombs are evenly arranged around the center of the sealing end face; wherein the shape of the honeycombs is the orthographic projection of a bee when its wings are in an open state when viewed from the back, the honeycombs are axially symmetrical in shape and the axis thereof passes through the center of the sealing end face, and the head of the honeycombs abuts against the outer edge of the sealing end face to form a medium inlet.
2. The sealing ring with a bee groove end face according to claim 1, characterized in that: The bee slot includes a body slot, a front wing slot and a hind wing slot. The slot depth of the body slot is not less than the slot depth of the front wing slot, and the slot depth of the front wing slot is not less than the slot depth of the hind wing slot.
3. The sealing ring with a bee groove end face according to claim 2, characterized in that: The groove depths of the body groove, the front wing groove and the hind wing groove gradually change from deep to shallow from the middle of the body groove to the front wing groove and the hind wing groove. The groove depths of the body groove, the front wing groove and the hind wing groove also gradually change from deep to shallow from the outer circle to the inner circle along the radial direction of the sealing ring.
4. The sealing ring with a bee groove end face according to claim 2, characterized in that: The groove depth of the body groove ranges from 6 to 20 microns, the groove depth of the forewing groove ranges from 6 to 16 microns, and the groove depth of the hindwing groove ranges from 6 to 14 microns.
5. The sealing ring with a honeycomb end face according to claim 1, characterized in that: The ratio of the area of all the honeycomb grooves to the sealing end surface is 0.2-0.
3.
6. The sealing ring with a bee groove end face according to claim 1, characterized in that: The number of the bee slots is no less than four.
7. A mechanical sealing device, characterized in that: It includes a dynamic ring, a static ring and an elastic compensation mechanism, the dynamic ring abuts against the static ring, at least one of the dynamic ring and the static ring is a sealing ring with a honeycomb end face as described in any one of claims 1-4, and the elastic compensation mechanism is suitable for providing elastic compensation for the dynamic ring or the static ring.