CN111981126A - Compound sealed end surface structure of three fens of collection micropores and ladder spiral groove - Google Patents
Compound sealed end surface structure of three fens of collection micropores and ladder spiral groove Download PDFInfo
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- CN111981126A CN111981126A CN201910432886.XA CN201910432886A CN111981126A CN 111981126 A CN111981126 A CN 111981126A CN 201910432886 A CN201910432886 A CN 201910432886A CN 111981126 A CN111981126 A CN 111981126A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
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Abstract
The invention discloses a composite sealing end face structure of a three-diversity micropore and a stepped spiral groove, which comprises a movable ring and a stationary ring, wherein the end face of the movable ring is provided with a plurality of spiral stepped grooves with different depths, including a basic wire groove and a basic spiral groove; the end face of the static ring is provided with a plurality of groups of fractal micropores which comprise three rows of sub-arc micropores and are in a three-diversity characteristic along the direction from the outer diameter to the inner diameter, and the sub-arc micropores have different depths from the outer diameter to the inner diameter; the area of the moving ring end surface, which is radially positioned in the spiral arc stepped groove, is a moving ring sealing dam, and the basic wire groove, the basic spiral groove and the moving ring sealing dam on the moving ring end surface respectively correspond to three rows of sub-arc micropores distributed from the outer diameter to the inner diameter on the static ring end surface one by one to form the composite graph characteristic of the moving ring contact surface. The composite sealing end face structure with the three-part micro-holes and the stepped spiral grooves has the characteristics of vibration suppression, stability enhancement and friction reduction, and has the advantages of strong dynamic pressure opening performance and low leakage of the end face.
Description
Technical Field
The invention relates to the technical field of mechanical sealing, in particular to a composite sealing end face structure with three-division micropores and step spiral grooves.
Background
Since the development of the last century, the mechanical seal is widely applied to shaft end seals of rotary machines such as compressors, pumps, turbines, flue gas turbines, reaction kettles and the like due to the outstanding performance advantages. The mechanical seal development stage can be divided into three stages: in the first stage, a pair of friction pairs formed by a movable ring and a static ring is used for continuously rubbing for a long time, and a cooling circulation device is used for cooling a contact end face, but the adverse effects of short service life, large vibration, insufficient stability and the like are exposed; in the second stage, specific patterns are carved on the surface of the movable ring, and a layer of ultrathin night film is formed on the contact end surface of the movable ring and the static ring through the dynamic pressure effect of the patterns, so that the abrasion is reduced, the service life is prolonged, but a stable opening force cannot be provided when the jolt vibration exists in a low-speed range or a service environment; and in the third stage, mainly aiming at the angle of friction and wear of the contact end face, the surface of the movable ring is subjected to diamond-like carbon film (DLC) treatment, so that the friction coefficient is reduced, and the surface wear is reduced. Therefore, most of the development of mechanical seal is developed around the second stage, but the mechanical seal always adopts a single ring to perform single graphic processing, for example, a Chinese patent-like laminated arhat composite groove deep-groove gas lubrication end face mechanical seal structure (CN104913066B) and a negative pressure type groove end face mechanical seal structure (CN201916486U) both adopt a dynamic pressure groove type arranged on a movable ring or a static ring, so that the dynamic pressure characteristic of a seal end face is improved, but the scheme that the movable ring and the static ring are simultaneously provided with composite graphics is not considered.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: in order to solve the problems of high leakage, insufficient liquid film rigidity and serious end surface scratch when the seal is operated under the low-speed and low-pressure jolting condition, the composite seal end surface structure has the characteristics of vibration suppression, stability enhancement and friction reduction under the low-speed and low-pressure jolting condition, and is provided with three-concentrated micropores and step spiral grooves with strong end surface dynamic pressure opening performance and low leakage.
The technical scheme adopted by the invention is as follows: the composite sealing end face structure comprises a moving ring and a static ring, wherein one end face of the moving ring is attached to one end face of the static ring to form a pair of sealing friction pairs, a plurality of spiral arc stepped grooves distributed spirally are uniformly arranged on the end face of the moving ring along the circumferential direction, and each spiral arc stepped groove starts from the outer edge of the driven ring to the middle diameter position of the moving ring; each spiral arc stepped groove comprises a basic wire groove and a basic spiral groove which are arranged along the direction from the outer diameter to the inner diameter, and the spiral arc stepped grooves are stepped with different depths;
a plurality of component-shaped micropores are uniformly arranged on the end face of the stationary ring along the circumferential direction, each component-shaped micropore comprises three rows of sub-arc micropores, and the three rows of sub-arc micropores are distributed in a three-component shape along the direction from the outer diameter to the inner diameter; the sub-arc micropores are respectively a first group of sub-arc micropores, a second group of sub-arc micropores and a third group of sub-arc micropores in the radial direction from the inner diameter to the outer diameter; the region that radially lies in spiral arc ladder inslot on the rotating ring terminal surface is the rotating ring sealing dam, correspond with basic wire casing place region and third group sub-circular arc micropore region on the rotating ring terminal surface, the region at basic spiral groove place corresponds with second group sub-circular arc micropore region, and rotating ring sealing dam region corresponds with first group sub-circular arc micropore region to make the spiral arc ladder groove of rotating ring and the three fens of quiet ring gather micropore formation compound pattern contact surface.
Further, the basic spiral groove comprises 2 to 5 sub spiral grooves, and the depth of each sub spiral groove is gradually increased along the direction from the inner diameter to the outer diameter; and the depth of the basic wire groove is greater than that of the outermost sub spiral groove.
Preferably, the number of the sub spiral grooves is three, and the depths of the three sub spiral grooves along the direction from the inner diameter to the outer diameter are respectively 1-3 μm, 3-5 μm and 5-7 μm; the depth of the basic wire groove is 7-9 mu m.
As an improvement, the groove shape of the moving ring spiral arc stepped groove gradually forms a convergent structure in the extending direction towards the middle diameter.
Preferably, the number of the spiral arc stepped grooves is 8-42.
Still further, the basic spiral groove on the end surface of the movable ring has a root diameter r4Arc included angle theta3At the outer diameter r with the basic wire groove0Arc included angle theta2Ratio of theta3/θ20.5 to 0.9; the region between every two adjacent spiral arc ladder grooves on the end face of the moving ring is a moving ring sealing weir, and the moving ring sealing weir and the spiral arc ladder grooves are arranged on the outer diameter r0Arc included angle of theta1And theta2/θ1＝0.1～0.5。
As an improvement, the first group of sub-arc micropores on the static ring consists of four rows of micropores, the second group of sub-arc micropores consists of two rows of micropores, and the third group of sub-arc micropores consists of one row of micropores.
Preferably, the depth of the first group of sub-arc micropores is 0-2 μm, the depth of the second group of sub-arc micropores is 4-6 μm, and the depth of the third group of sub-arc micropores is 8-10 μm.
Preferably, the number of the first group of sub-arc micropores is 32-168, the number of the second group of sub-arc micropores is 16-84, and the number of the third group of sub-arc micropores is 8-42; wherein the number of the third group of sub-arc micro-holes is consistent with the number of the spiral arc stepped grooves.
Improved, the arc included angle theta of the first group of sub-arc micropores33The included angle theta between the second group of sub-arc micropores and the arc22Ratio of theta33/θ 221/3, the included angle theta of the circular arc of the second group of sub-circular arc micropores22The arc included angle theta with the third group of sub-arc micro-holes11Ratio of theta22/θ 111/3. The distribution structure thus constitutes a three-diversity feature.
The working principle of the invention is as follows: in the mechanical seal opening stage, the rotating speed and the pressure are low and are not enough to push the end face of the static ring to form an effective liquid film; the fractal texture characteristic of the three-section gathering micropore of the static ring is utilized to reduce the friction coefficient and the abrasion loss of the end face and effectively inhibit the vibration of the static ring and the static ring; meanwhile, when the fluid enters the spiral arc stepped groove from the outer edge of the driven ring, the straight-through performance of the linear groove is good, more fluid flow can be borne, and the phenomenon that the dynamic and static rings form dry friction to cause hot cracking of the sealing ring is avoided. Then, after the rotating speed is increased, fluid enters the basic spiral groove from the basic line groove, and because the basic spiral groove in the structure comprises three stepped sub spiral grooves, the three sub spiral grooves have step and convergence characteristics, a Rayleigh step effect and a fluid dynamic pressure effect are gradually generated, so that the fluid pressure is gradually improved and strengthened; meanwhile, the composite pattern of the three-part concentrated micropores of the static ring enables the fluid to form a Rayleigh step effect through a step effect for many times, so that the fluid is continuously concentrated, accumulated and blocked to form a more obvious pressure wave crest, and the dynamic ring and the static ring form a liquid film with high pressure and high rigidity. And then, after the mechanical seal enters a stable working state, the static ring three-diversity fractal micro-hole is combined with the spiral arc stepped groove of the movable ring, so that the energy dissipation of the fluid is caused, the energy vortex of the fluid is reduced, and the radial leakage of the fluid is reduced.
The invention has the advantages and beneficial effects that:
1. the structure of the invention utilizes the parallel combination characteristic of the dynamic ring spiral arc step micro-groove and the static ring three-diversity fractal micro-hole, and the dynamic ring and the static ring form an integral friction member, thereby abandoning the independence and one-sidedness of the prior single surface slotting or perforating;
2. in the mechanical seal operation process, the seal opening force is improved through the spiral arc stepped groove on the surface of the movable ring, the opening speed at low speed is enhanced, and the film rigidity is increased; on the other hand, the friction coefficient in the sealing contact process is reduced through the three-diversity fractal micropores on the surface of the static ring, the surface abrasion is reduced, the sealing stability is improved, and the abrasive particle storage function is played. The dynamic property and the frictional property are systematically unified by the composite parallel pattern of the two, so that the stability and the service life of the mechanical seal are fundamentally improved;
3. according to the movable ring spiral arc stepped groove in the structure, the groove shape is continuously converged from the outer diameter area of the driven ring to the intermediate diameter area, and the linear groove is overlapped with the spiral groove for three times in the process of transition, so that stronger conductivity and compressibility are formed; the static ring three-diversity fractal micropores are provided with uniform circular arc micropores with length proportion, quantity proportion and area proportion in the circumferential direction and the radial direction, from the outer diameter area to the inner diameter area of the static ring, the micropores are gradually reduced, and the quantity is gradually increased, so that the texture characteristic is formed, and the vibration and wear rate of the sealing contact surface is reduced; in addition, the coupling superposition of the dynamic and static ring microgrooves and the micropores can form higher pressure wave peaks, and the sealing end face can be opened more quickly; the fractal micropores can weaken the vortex phenomenon of the end face, reduce the vibration of the contact face and improve the sealing stability.
4. The composite parallel pattern of the three-fractal micro-hole and the spiral arc stepped groove in the structure has excellent application effect on mechanical dynamic seal for the water hinge of a high-power communication device with jolt vibration, impact, load alternation and long-time low-speed operation, and achieves the aims of vibration suppression, stability enhancement, friction reduction, strong dynamic pressure and low leakage.
Drawings
FIG. 1 is a schematic view of the slotted end face of the rotating ring of the present invention.
Fig. 2 is a schematic view of an open end face of a stationary ring in the present invention.
FIG. 3 is a schematic illustration of the slotted end face geometry parameter definition of the rotating ring of the present invention.
Fig. 4 is a schematic illustration of the aperture end face geometry parameter definition of the stationary ring of the present invention.
Fig. 5 is a three-dimensional structure view of the grooved end face of the rotating ring of the invention.
Fig. 6 is a grooved end face perspective view of the stationary ring of the invention.
FIG. 7 is a composite of a partial dynamic and static ring in the present invention.
The sealing structure comprises a 100-spiral arc stepped groove, a 110-fractal micro hole, a 120-moving ring sealing dam, a 130-moving ring sealing weir, a 140-static ring sealing weir, a 150-static ring sealing dam, a 1-basic wire groove, a 2-basic spiral groove, a 2.1-sub spiral groove, a 2.1.1-first sub spiral groove, a 2.1.2-second sub spiral groove, a 2.1.3-third sub spiral groove, a 3-sub arc micro hole, a 3.1-first group of sub arc micro holes, a 3.2-second group of sub arc micro holes, a 3.3-third group of sub arc micro holes, a 4-straight line, a 5-straight line, a 6-moving ring outer edge line, a 7-outer contour arc line, an 8-spiral line, a 9-spiral line, and a 10-11-12-arc line segment.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1 and 2, the present invention provides a composite sealing end surface structure with three-diversity micropores and stepped spiral grooves, which includes a moving ring and a stationary ring, wherein an end surface of the moving ring is attached to an end surface of the stationary ring to form a pair of sealing friction pairs, as shown in fig. 7, a plurality of spiral stepped grooves 100 are uniformly arranged on the end surface of the moving ring along the circumferential direction, and each spiral stepped groove 100 starts from the outer edge of the moving ring to the middle diameter of the moving ring. Every spiral arc ladder groove 100 includes along the basis wire casing 1 and the basis helicla flute 2 that set up from the direction of external diameter to internal diameter, and spiral arc ladder groove 100 is the notch cuttype that the degree of depth differs.
Specifically, as shown in fig. 1 and 3, the basic trunking 1 comprises straight lines 4 and 5 and a moving ring outer edge line 6 (radius r)oThe circle) and the outer contour circular arc line 7 of the basic spiral groove 2. The basic spiral groove 2 is an arc-shaped groove consisting of two spiral lines 8 and 9 and two concentric inner and outer circular arc lines 10 and 7.
As shown in fig. 3, the basic wire duct 1 has a length L1The basic helical groove 2 has a length L2The length of the whole spiral arc stepped groove 100 is L 3(ii) a Wherein L is3＝L1+L2And L is1/L2＝1-2。
The number of the spiral arc stepped grooves 100 is 8-42. As shown in fig. 1, in the present embodiment, the number of spiral arc stepped grooves 100 is preferably 12. Further, the groove shape of each spiral arc stepped groove 100 gradually converges in the direction in which the groove diameter extends toward the moving ring.
Specifically, the basic spiral groove 2 comprises 2 to 5 sub spiral grooves 2.1, and the depth of each sub spiral groove 2.1 is gradually increased along the direction from the inner diameter to the outer diameter; and the depth of the basic wire groove 1 is greater than that of the outermost sub spiral groove 2.1.
In this embodiment, it is preferable that the number of the sub spiral grooves 2.1 is three,the three partial spiral grooves 2.1 each consist of a spiral line 8, 9 and a circular arc line section 7, 10, 11, 12 of corresponding radius. The arc segment 10 is the position of the middle radius of the end surface of the moving ring, and the radius r is shown in fig. 34A segment of the circle. Namely, each arc line segment 10 is one of the arcs of the circle of the middle diameter of the end surface of the moving ring.
Specifically, as shown in fig. 1, the three sub spiral grooves 2.1 are a first sub spiral groove 2.1.1, a second sub spiral groove 2.1.2, and a third sub spiral groove 2.1.3, respectively, in the direction from the inner diameter to the outer diameter, and the three sub spiral grooves 2.1 are evenly divided in the base spiral groove 2.
The first sub spiral groove 2.1.1 consists of two spiral lines 8, 9 and arc line sections 10, 11; the second sub spiral groove 2.1.2 consists of two spiral lines 8, 9 and arc line sections 11, 12; the third partial spiral groove 2.1.3 is formed by two spiral lines 8, 9 and circular arc line sections 7, 12. As shown in FIG. 3, the arc segment 7 has a radius r1A segment of the circle; the arc segment 12 is a radius r2A segment of the circle; the arc segment 11 is a radius r3A segment of the circle.
And the depths of the three sub spiral grooves 2.1 along the direction from the inner diameter to the outer diameter are 1 to 3 μm, 3 to 5 μm, and 5 to 7 μm, respectively. That is, the first sub spiral groove 2.1.1 has a depth of 1 to 3 μm, the second sub spiral groove 2.1.2 has a depth of 3 to 5 μm, the third sub spiral groove 2.1.3 has a depth of 5 to 7 μm, and the base line groove 1 has a depth of 7 to 9 μm, as shown in fig. 5.
Further, as shown in FIG. 3, the basic spiral groove 2 on the end face of the rotating ring has a root diameter r4Arc included angle theta3At the outer diameter r with the basic wire casing 10Arc included angle theta2Ratio of theta3/θ20.5 to 0.9; the area between every two adjacent spiral arc stepped grooves 100 on the end surface of the moving ring is a moving ring sealing weir 130, and the outer diameter r of the moving ring sealing weir 130 and the spiral arc stepped grooves 100 is0Arc included angle of theta 1And theta2/θ1＝0.1～0.5。
Meanwhile, a plurality of component-shaped micropores 110 are uniformly arranged on the end face of the stationary ring along the circumferential direction, each component-shaped micropore 110 comprises three rows of sub-arc micropores 3, and the depth of the three rows of sub-arc micropores 3 from the inner diameter to the outer diameter area is gradually increased along the radial direction. Specifically, as shown in fig. 2, every two adjacent fractal micro-holes 110 are separated by a static ring sealing weir 140, and every row of sub-circular arc micro-holes 3 are distinguished by a static ring sealing dam 150. The sub-arc micropores 3 are respectively a first group of sub-arc micropores 3.1, a second group of sub-arc micropores 3.2 and a third group of sub-arc micropores 3.3 from the inner diameter to the outer diameter in the radial direction.
As shown in fig. 2, three rows of sub-arc micro-holes 3 are distributed in a three-diversity shape along the direction from the outer diameter to the inner diameter, specifically: the static ring micropores have a three-diversity characteristic, the radial width of the static ring is divided into five sections, two adjacent ends are removed to form three sections, and the third group of sub-arc micropores 3.3 is one section; the second group of sub-arcs 3.2 are evenly divided into three sections according to the first group of sub-arcs 3.3, and the middle sections are removed; the first group of sub-arcs 3.1 are divided into three sections according to the width corresponding to the two micropores of the second group of sub-arcs 3.2, and the middle sections are removed respectively, so that the static ring micropores present a three-diversity characteristic.
More specifically, the first group of sub-circular arc micro-holes 3.1 is composed of four rows of micro-holes, the second group of sub-circular arc micro-holes 3.2 is composed of two rows of micro-holes, and the third group of sub-circular arc micro-holes 3.3 is composed of one row of micro-holes. More specifically, as shown in fig. 6, the depth of the first group of sub-circular arc micro-holes 3.1 is 0-2 μm, the depth of the second group of sub-circular arc micro-holes 3.2 is 4-6 μm, and the depth of the third group of sub-circular arc micro-holes 3.3 is 8-10 μm. As shown in FIG. 4, the first group of sub-arc micropores 3.1 is formed by the inner diameter r of the stationary ringiiThe circle has a radius of r44The arc and the radial line segment extending from the center of the circle are formed; the radius of the second group of sub-arc micropores 3.2 is r33、r22The arc and the radial line segment extending from the center of the circle are formed; the third group of sub arc micro-holes 3.3 consists of the outer diameter r of the static ringooThe circle has a radius of r11The arc and the radial line segment extending from the center of the circle. The first sub-arc micro-hole 3.1, the second sub-arc micro-hole 3.2 and the third sub-arc micro-hole are in proportion to the length, the number and the area of the micro-holes in the circumferential direction and the radial direction; wherein the radial length of each group of sub-arc micropores is proportionalPreferably, the radial lengths of the first group of sub-circular arc micro-holes 3.1, the second group of sub-circular arc micro-holes 3.2 and the third group of sub-circular arc micro-holes 3.3 are equal.
The number of the first group of sub-arc micropores is 32-168, the number of the second group of sub-arc micropores is 16-84, and the number of the third group of sub-arc micropores is 3.3-42; wherein the number of the third group of sub-arc micro-holes 3.3 is consistent with the number of the spiral arc stepped grooves 100. In this embodiment, as shown in fig. 2, the number of the third group of sub-arc micro holes 3.3 is 12, the number of the second group of sub-arc micro holes 3.2 is 24, and the number of the first group of sub-arc micro holes 3.1 is 48.
Further, as shown in fig. 4, the included angle θ between the arcs of the first group of sub-arc micro-holes 3.133The arc included angle theta between the second group of sub-arc micropores and the second group of sub-arc micropores 3.222Ratio of theta33/θ 221/3, the included angle theta of the circular arc of the second group of sub circular arc micropores 3.222The arc included angle theta with the third group of arc micropores 3.311Ratio of theta22/θ 111/3, so that each group of sub-circular arc micropores on the end face of the static ring forms a three-diversity characteristic.
The area of the moving ring end surface, which is radially located within the spiral arc stepped groove 110, is a moving ring sealing dam 120, the area of the moving ring end surface, where the basic wire groove 1 is located, corresponds to the area of the third group of sub-arc micropores 3.3, the area of the basic spiral groove 2 corresponds to the area of the second group of sub-arc micropores 3.2, and the area of the moving ring sealing dam 120 corresponds to the area of the first group of sub-arc micropores 3.1, so as to form a composite contact surface of the moving ring end surface and the stationary ring end surface, as shown in fig. 7.
The foregoing has described preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary, and various changes made within the scope of the independent claims of the present invention are within the scope of the present invention.
Claims (10)
1. The utility model provides a compound sealed end face structure of three minutes collection micropores and ladder spiral groove, includes rotating ring and quiet ring, a terminal surface of rotating ring laminates mutually with a terminal surface of quiet ring and forms a pair of sealed friction pair, its characterized in that: a plurality of spiral arc stepped grooves (100) which are distributed spirally are uniformly arranged on the end surface of the movable ring along the circumferential direction, and each spiral arc stepped groove (100) starts from the outer edge of the driven ring to the middle diameter position of the movable ring; each spiral arc stepped groove (100) comprises a basic wire groove (1) and a basic spiral groove (2) which are arranged along the direction from the outer diameter to the inner diameter, and the spiral arc stepped grooves (100) are in stepped shapes with different depths;
a plurality of component-shaped micropores (110) are uniformly arranged on the end face of the stationary ring along the circumferential direction, each component-shaped micropore (110) comprises three rows of sub-arc micropores (3), and the three rows of sub-arc micropores (3) are distributed in a three-diversity characteristic shape along the direction from the outer diameter to the inner diameter; the sub-arc micropores (3) are respectively a first group of sub-arc micropores (3.1), a second group of sub-arc micropores (3.2) and a third group of sub-arc micropores (3.3) in the radial direction from the inner diameter to the outer diameter;
The region that radially lies in spiral arc ladder groove (100) on the rotating ring terminal surface is rotating ring sealing dam (120), the rotating ring terminal surface is gone up and is corresponded with basic wire casing (1) place region and third group's sub-circular arc micropore (3.3) region, and the region at basic spiral groove (2) place corresponds with second group's sub-circular arc micropore (3.2) region, and rotating ring sealing dam (120) region corresponds with first group's sub-circular arc micropore (3.1) region to make spiral arc ladder groove (100) of rotating ring and three diversity micropore (110) of quiet ring form compound pattern contact surface.
2. The composite sealing end face structure of the three-diversity micro-hole and the stepped spiral groove according to claim 1, characterized in that: the basic spiral groove (2) comprises 2-5 sub spiral grooves (2.1), and the depth of each sub spiral groove (2.1) is gradually increased along the direction from the inner diameter to the outer diameter; and the depth of the basic wire groove (1) is greater than that of the outermost sub spiral groove (2.1).
3. The composite sealing end face structure of the three-diversity micro-hole and the stepped spiral groove according to claim 2, characterized in that: the number of the sub spiral grooves (2.1) is three, the depths of the three sub spiral grooves (2.1) along the direction from the inner diameter to the outer diameter are respectively 1-3 mu m, 3-5 mu m and 5-7 mu m, and the depth of the basic line groove (1) is 7-9 mu m.
4. The composite sealing end face structure of the three-diversity micro-hole and the stepped spiral groove according to claim 1, characterized in that: the groove type of the moving ring spiral arc stepped groove (100) gradually forms a convergence structure in the direction extending towards the middle diameter.
5. The composite sealing end face structure of the three-diversity micro-hole and the stepped spiral groove according to claim 1, characterized in that: the number of the spiral arc stepped grooves (100) is 8-42.
6. The composite sealing end face structure of the three-diversity micro-hole and the stepped spiral groove according to claim 1, characterized in that: the root diameter r of a basic spiral groove (2) on the end surface of the moving ring4Arc included angle theta3Is arranged at the outer diameter r with the basic wire groove (1)0Arc included angle theta2Ratio of theta3/θ20.5 to 0.9; the region is the sealed weir (130) of rotating ring between every two adjacent spiral arc ladder grooves (100) on the rotating ring terminal surface, the sealed weir (130) of rotating ring adds spiral arc ladder groove (100) at external diameter r0Arc included angle of theta1And theta2/θ1＝0.1～0.5。
7. The composite sealing end face structure of the three-diversity micro-hole and the stepped spiral groove according to claim 1, characterized in that: the first group of sub-arc micropores (3.1) consists of four rows of micropores, the second group of sub-arc micropores (3.2) consists of two rows of micropores, and the third group of sub-arc micropores (3.3) consists of one row of micropores.
8. The composite sealing end face structure of the three-diversity micro-hole and the stepped spiral groove according to claim 7, characterized in that: the depth of the first group of sub-arc micropores (3.1) is 0-2 mu m, the depth of the second group of sub-arc micropores (3.2) is 4-6 mu m, and the depth of the third group of sub-arc micropores (3.3) is 8-10 mu m.
9. The composite sealing end face structure of the three-diversity micro-hole and the stepped spiral groove according to claim 7, characterized in that: the number of the first group of sub-arc micropores (3.1) is 32-168, the number of the second group of sub-arc micropores (3.2) is 16-84, and the number of the third group of sub-arc micropores (3.3) is 8-42; wherein the number of the third group of sub-arc micro-holes (3.3) is consistent with that of the spiral arc stepped grooves (100).
10. The composite sealing end face structure of the three-diversity micro-hole and the stepped spiral groove according to claim 7, characterized in that: the arc included angle theta of the first group of sub-arc micropores (3.1)33The included angle theta between the arc-shaped micro-hole and the arc-shaped micro-hole (3.2) of the second group of sub-arc-shaped micro-holes22Ratio of theta33/θ221/3, the included angle theta of the circular arc of the second group of sub circular arc micropores (3.2)22An arc included angle theta with the third arc micropore (3.3)11Ratio of theta22/θ11＝1/3。
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