CN216741145U - Hydraulic rotary buffer with static and dynamic dual-state damping - Google Patents

Abstract

The utility model discloses a hydraulic rotary buffer with static and dynamic dual-state damping, which comprises a shaft sleeve with an oil cavity and a rotating shaft matched with the oil cavity for sealing and rotating the flexible oil, wherein two rotor plates for flexible oil are symmetrically arranged on an inner shaft section at one side of a convex ring on the rotating shaft in the radial direction; when the shaft sleeve only rotates forwards relative to the rotating shaft, the elastic valve deforms to open the valve hole to release fluid pressure, so that the toilet cover plate can be turned upwards in the whole process without resistance; when the shaft sleeve rotates reversely relative to the rotating shaft, the valve hole is closed, a sealing cavity for braking the shaft sleeve is formed in the oil cavity when the toilet cover plate inclines, the sealing cavity can generate siphon negative pressure resistance to ensure that the toilet cover plate inclines stably, the toilet cover plate is turned downwards manually to overcome the resistance, the shaft sleeve rotates slowly after the separating rib is separated from the first sealing surface section, and the toilet cover plate slowly and silently falls back finally.

Description

Hydraulic rotary buffer with static and dynamic dual-state damping

Technical Field

The utility model relates to a hydraulic rotary damper for fast opening and slow closing and pivoting of a toilet cover plate, in particular to a hydraulic rotary damper with static and dynamic dual-state damping.

Background

Most of the toilet cover plates on the market at present are pivoted with hydraulic rotary dampers, which can realize no damping in the whole process when the toilet cover plate is turned upwards, no damping in the front half process when the toilet cover plate is turned down, and damp the toilet cover plate slowly and silently to cover in the rear half process when the toilet cover plate is turned down, so that the toilet cover plate is prevented from being quickly turned down and impacting a ceramic toilet to generate noise; because the damper does not generate hydraulic damping braking during the second half of the upward turning and the first half of the downward turning of the toilet cover plate, the gravity center is unstable and easy to rebound and fall when the quickly-turned toilet cover plate is inclined and abutted on a toilet water tank in an inclined way of more than 90 degrees, the cover plate must be manually turned again and is put aside after being erected in a stable inclined state, and the use is inconvenient.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model aims to provide a hydraulic rotary buffer with static and dynamic dual-state damping, which has a very simple structure, realizes the functions of no damping in the whole lifting process of a toilet cover plate and slow falling in the damping braking process after the toilet cover plate is closed, and can also form a transient static sealing damping cavity for maintaining the tilting state of the cover plate when the toilet cover plate is lifted to the maximum angle; the toilet cover plate is actuated by hands to downwards turn over a small angle by force, the static sealing cavity can be opened to discharge negative pressure, the toilet cover plate can freely turn over without damping after the hands are loosened, and the hydraulic damping brake cover plate still slowly turns over and is closed in a silent mode after the rear half of the turning over of the toilet cover plate.

In order to achieve the above object, the present invention provides a hydraulic rotary damper with static and dynamic dual-state damping, which comprises a shaft sleeve with an oil cavity and a rotating shaft which is matched with the oil cavity in a sealed and rotating manner, wherein two rotor plates for oil scratching are radially and symmetrically arranged on an inner shaft section at one side of a convex ring on the rotating shaft, and two symmetrical spacing ribs on the oil cavity wall can be in contact fit with the radial surface of the inner shaft section and define the rotation amplitude of the rotor plates, and the hydraulic rotary damper is characterized in that: each rotor wing plate is provided with a one-way oil passing valve hole, and each rotor wing plate is embedded, clamped and fixed with an elastic valve which is in close contact with the oil cavity wall and is in sliding fit with the oil cavity wall and seals the valve hole; the shaft sleeve rotates positively relative to the rotating shaft, and the elastic valve is pushed by the unidirectional oil passing fluid pressure of the valve hole to elastically deform so as to open the valve hole to release the fluid pressure; the shaft sleeve rotates reversely relative to the rotating shaft, and the elastic valve deforms and recovers to close the valve hole; on the shaft sleeve rotating reversely relative to the rotating shaft, a first sealing surface section jointed with the spacing ribs, a quick oil passing groove in clearance fit with the spacing ribs and a second sealing surface section jointed with the spacing ribs are sequentially connected and arranged on the radial surface of the inner shaft section from the root of one rotor wing plate to the root of the other rotor wing plate; when the shaft sleeve rotates reversely relative to the rotating shaft and the spacing rib is attached to the first sealing surface section, a space surrounded by the oil cavity wall, the elastic valve, the rotary wing plate, the first sealing surface section and the spacing rib forms a sealing cavity for braking the relative rotation of the shaft sleeve and the rotating shaft; when the partition ribs slide in a fit manner with the second sealing surface section, the rotor wing plates are matched with the slow oil seepage grooves in the shaft sleeves to pass oil at a low speed, so that hydraulic pressure difference generated on two sides of the rotor wing plates is attenuated, and the shaft sleeves rotate slowly.

The elastic valve is provided with a clamping groove which is in nested fit with the rotor plate, an oil passing notch which is avoided from one end of the valve hole, and a valve plate which is elastically blocked from the other end of the valve hole, wherein the elastic valve is provided with a gap which does not influence the elastic deflection, swinging and deformation of the valve plate; the gap is arranged to push the valve plate to elastically flex and swing to open the valve hole to pass oil when hydraulic damping oil passes through the valve hole, and the clamping groove still clamps the rotor plate.

A partition plate vertically connected with a partition rib is arranged in an oil cavity, a bearing hole is formed in the middle of the partition plate, and a pivot shaft rotationally matched with the bearing hole is arranged at the end of an inner shaft section.

The axial end face of the rotor wing plate is in sliding contact with the partition plate face, the two concave slow oil seepage grooves are symmetrically arranged on the partition plate face, and when the axial end face of the rotor wing plate rotates to the positions of the slow oil seepage grooves, damping oil can flow from one side of the rotor wing plate to the other side of the rotor wing plate through the slow oil seepage grooves.

The utility model relates to a baffle plate, which is characterized in that the edge of a bearing hole at two sides of each partition rib on the baffle plate is provided with a throttling port which can enable damping oil at two sides of the partition rib to be communicated at the rear side of the baffle plate, and the rear part of a shaft sleeve is provided with an adjusting nut for sealing or adjusting the communicating opening of all the throttling ports.

The rear part of the shaft sleeve is provided with a threaded hole screwed with the adjusting nut, and the end surface of the adjusting nut can be tightly attached to the partition plate to seal the throttling opening or leave the end surface from the partition plate to adjust the opening communicated with all the throttling openings by rotating the adjusting nut.

The adjusting nut is provided with a rear sealing ring, and the rear sealing ring is sealed between a sliding column section of the adjusting nut and a smooth section wall on the inner side of a threaded hole.

The utility model also comprises a backing ring, a front sealing ring and a gland, wherein the backing ring is sleeved on the rotating shaft and pressed on the outer ring surface of the convex ring; the gland is sleeved on the rotating shaft to press the backing ring, the shaft sleeve is welded and fixed with the oil cavity opening, and the front sealing ring is sealed between the gland and the rotating shaft.

The utility model has the following beneficial effects:

firstly, the shaft sleeve rotates forwards and rapidly in the whole undamped way relative to the rotating shaft, and the valve hole is opened in one way by the elastic valve to rapidly pass through

Oil, there is no hydraulic pressure difference to brake the spacer rib on both sides of the rotor plate; the toilet cover plate connected with the shaft sleeve can be quickly opened; secondly, a sealing cavity is formed at the initial position section of the shaft sleeve rotating reversely relative to the rotating shaft, once the sealing cavity is sealed and expanded, siphon negative pressure can be generated to brake the shaft sleeve and the rotating shaft to rotate relatively, and stable tilting of the toilet cover plate connected with the shaft sleeve is realized;

the inclined closestool cover plate is actuated by hand to turn down by a small angle, the shaft sleeve rotates reversely relative to the rotating shaft to a position of a quick oil passing groove, the static sealing cavity is opened to unload negative pressure, the closestool cover plate can freely turn down without damping after hand release, the hydraulic damping is dynamically attenuated by slow oil seepage in the latter half of the cover plate turning down, and the damping brake cover plate slowly turns down and is covered in a silent manner;

the toilet cover plate has a simple and practical structure, and the stable tilting function of the toilet cover plate can be realized without adding a torsion spring or a mechanical elastic positioning piece such as a spring pin outside the shaft sleeve or outside the shaft sleeve.

Drawings

Fig. 1 is an exploded view of a three-dimensional assembly structure according to the present invention.

Fig. 2 is an exploded view of the three-dimensional assembly structure of the present invention.

Fig. 3 is a first exploded view of a three-dimensional assembly structure of a rotating shaft and a shaft sleeve according to the present invention.

Fig. 4 is an exploded view of the three-dimensional assembly structure of the shaft and the shaft sleeve of the present invention.

FIG. 5 is a cross-sectional view of the structure of the present invention taken along line A-A, B-B.

FIG. 6 is a structural sectional view taken along the direction G-G in the present invention.

Fig. 7 is a structural sectional view of the whole processes (a) to (d) of the undamped operation of the sleeve in the forward rotation.

Fig. 8 is a structural sectional view showing the damping oil flowing before and after rapidly and slowly during the reverse rotation processes (d) to (f) of the sleeve.

Fig. 9 is a schematic structural view of static siphon negative pressure brake generated at the starting position section of the reverse rotation of the shaft sleeve.

Fig. 10 is a schematic structural view of releasing static siphon negative pressure brake and passing oil rapidly by the reverse rotation of the shaft sleeve.

Fig. 11 is a schematic structural view showing slow decay of oil pressure when the sleeve rotates in the reverse direction to reach the second sealing surface section.

Fig. 12 is a stroke angle schematic of the reverse rotation of the sleeve through the second sealing surface to produce a hydraulically damped braking.

The figures in the drawings are identified as:

10. a shaft sleeve; 11. an oil chamber; 111. an oil cavity wall; 12. a partition plate; 121. a bearing bore; 122. a slow oil seepage groove; a choke 123; 13. separating ribs; 14. a threaded hole;

20. a rotating shaft; 21. a convex ring; 22. an inner shaft section; 22a. a first sealing face section; 221. rapidly passing through an oil groove; 22b. a second sealing face section; 23. a rotor plate; 231. a valve bore; 24. a pivot;

30. an elastic valve; 31. a clamping groove; 32. an oil passing notch; 33. thinning; 34. a valve plate;

40. a backing ring;

50. a front seal ring;

60. a gland;

70. adjusting the nut; 71. an end face; 72. a rear seal ring;

NP. sealing the cavity;

DT. damp the stroke.

Detailed Description

The utility model is further illustrated with reference to the following figures and examples.

The hydraulic rotary damper with static and dynamic dual-state damping as shown in fig. 1-6 is mainly composed of a shaft sleeve 10, a rotating shaft 20, two elastic valves 30, a backing ring 40, a front sealing ring 50, a gland 60 and an adjusting nut 70.

The specific structures of the shaft housing 10, the rotary shaft 20 and the elastic valve 30 according to the present invention are described in detail below:

as shown in the shaft sleeve 10 structure shown in fig. 1 to 6, the shaft sleeve 10 of the present invention has an oil cavity 11 filled with damping oil, two symmetric partition ribs 13 are convexly arranged on an oil cavity wall 111, a partition plate 12 vertically connected with the partition ribs 13 is further arranged in the oil cavity 11, and a threaded hole 14 is arranged at the rear part of the shaft sleeve 10; the middle of the clapboard 12 is provided with a bearing hole 121 communicated with the threaded hole 14; two concave slow oil seepage grooves 122 are symmetrically arranged on the surface of the partition plate 12, and throttling ports 123 which can enable damping oil on two sides of each partition rib 13 to be communicated with each other on the rear side of the partition plate 12 are arranged along bearing holes 121 on two sides of each partition rib 13 on the partition plate 12.

As shown in fig. 1-6, in the structure of the rotating shaft 20, two rotor plates 23 for scratching oil are radially and symmetrically arranged on the inner shaft section 22 at one side of the convex ring 21 on the rotating shaft 20, two one-way oil passing valve holes 231 are arranged on each rotor plate 23, and a pivot 24 is arranged at the end of the inner shaft section 22; on the shaft sleeve 10 rotating reversely relative to the rotating shaft 20, a first sealing surface section 22A attached to the spacer 13, a fast oil passing groove 221 in clearance fit with the spacer 13, and a second sealing surface section 22B attached to the spacer 13 are sequentially connected and arranged on the radial surface of the inner shaft section 22 from the root of one rotor wing plate 23 to the root of the other rotor wing plate 23.

As shown in fig. 1 to 6, the elastic valve 30 of the present invention has a groove 31 fitted in the rotor plate 23, an oil passing notch 32 formed at one end of the valve hole 231, and a valve plate 34 elastically closing the other end of the valve hole 231, and the elastic valve 30 is provided with a notch 33 which does not affect the elastic deflection and swing deformation of the valve plate 34.

The assembly of the utility model is described in detail below:

as shown in fig. 1 to 6, the adjusting nut 70 is first screwed into the threaded hole 14 at the rear of the shaft sleeve 10, the end face 71 of the adjusting nut 70 is located at the rear side of the partition plate 12, the rear seal ring 72 mounted on the adjusting nut 70 is sealed between the slide column section of the adjusting nut 70 and the smooth section wall at the inner side of the threaded hole 14, so as to realize the assembly and installation of the adjusting nut 70 at the rear end of the shaft sleeve 10, and the adjusting nut 70 can be rotated to make the end face 71 tightly contact with the partition plate 12 to seal the orifice 123 or make the end face 71 leave the partition plate 12 to adjust the opening degree communicated with all the orifices 123; the shaft sleeve oil cavity 11 is filled with a certain amount of damping oil in advance.

As shown in fig. 1 to 6, the two elastic valves 30 are fixed on the rotor plate 23 by nesting and clamping through the clamping grooves 31, the oil inlet end of the valve hole 231 is kept free by the oil gap 32, and the valve plate 34 elastically contacts the surface of the rotor plate 23 to seal the oil outlet end of the valve hole 231, so that the two elastic switch valves for controlling the one-way oil passing of the valve hole 231 can be assembled on the two rotor plates 23 of the rotating shaft 20. Then, the backing ring 40 is sleeved outside the convex ring 21 of the rotating shaft 20, the front seal ring 50 is sleeved outside the rotating shaft 20 and is cushioned outside the convex ring 21, the gland 60 is arranged on the rotating shaft 20, the front seal ring 50 and the backing ring 40 are pressed outside the convex ring 21 together, and the front seal ring 50 is sealed between the gland 60 and the rotating shaft 20; inserting the inner shaft section 22 into the oil cavity 11 filled with damping oil, wherein a pivot shaft 24 at the end of the inner shaft section 22 is in rotating fit with a bearing hole 121 in the center of the partition plate 12, and each rotor plate 23 is positioned between two partition ribs 13; the inner side surface of the convex ring 21 is in smooth sliding fit with the shaft end of the spacer rib 13, the axial end surface of the wing plate 23 is in smooth sliding fit with the plate surface of the partition plate 12, the outer end surface of each elastic valve 30 is in close sliding fit with the oil cavity wall 111, and the two spacer ribs 13 and the diameter surface of the inner shaft section 22 can be abutted and attached to limit the rotation amplitude of the rotary wing plate 23; then the gland 60 is sleeved and fixed with the opening of the oil cavity 11 of the shaft sleeve 10 by wave soldering, and the integral assembly of the utility model is completed.

The operation principle and the concrete operation of the present invention will be described in detail below.

The outer end of the rotating shaft 20 is fixed with a bracket fixed on the ceramic toilet stool, and the shaft sleeve 10 is connected with the toilet cover plate, so that the shaft sleeve 10 can rotate relative to the rotating shaft 20.

When the toilet lid is in a horizontal closed state (at the initial position of the toilet lid being turned up), as shown in fig. 5, 6 and 7 (a), the partition rib 13 is attached to the second sealing surface section 22B, and the valve plate 34 of the elastic valve 30 on the rotor plate 23 abuts against the side surface of the partition rib 13, the valve plate 34 is flatly attached to the oil outlet end of the valve hole 231 on the rotor plate 23, and the axial end surface of the rotor plate 23 is located on the slow oil-leaking groove 122 in a sliding manner.

The whole process of the toilet lid being opened upwards (the shaft sleeve 10 rotating in the positive direction relative to the fixed rotating shaft 20): as shown in fig. 7 and 5, in the whole process of (a) - (d) when the toilet lid is lifted and turned upwards, the shaft sleeve 10 is driven to rotate in the forward direction relative to the fixed rotating shaft 20, the barrier rib 13 contacts the second sealing surface section 22B to rotate counterclockwise, the barrier rib 13 flexes and presses the damping oil in the oil chamber 11 towards the oil passing gap 32 on the rotor plate 23, the damping oil enters the valve hole 231 through the oil passing gap 32, the valve hole 231 pushes the valve plate 34 of the elastic valve 30 to elastically deform by unidirectional oil passing fluid pressure to open the valve hole 231 to release fluid pressure, so that the damping oil can rapidly pass through the rotor plate 23 and cannot form hydraulic pressure difference on both sides of the rotor plate 23, even if the shaft sleeve 10 can rapidly rotate without hydraulic damping, until the barrier rib 13 slides and skims the rapid oil passing groove 221 on the inner shaft section 22 and the first sealing surface section 22A in the reverse direction, the barrier rib 13 contacts the root of the rotor plate 23, and stops rotating, the pressure oil action of the spacer 13 to the valve hole 231 is finished, and the valve plate 34 is elastically deformed to restore and close the valve hole 231, so that the toilet cover plate is turned to a static inclined state with the maximum angle.

The principle that the opened toilet cover plate keeps a stable inclined state is as follows:

as shown in fig. 7 (d) and fig. 9 (d1), when the sleeve 10 rotates forward to the maximum position relative to the rotating shaft 20, the toilet lid is still in the inclined state, the valve plate 34 of the elastic valve 30 elastically restores to seal the valve hole 231, and the partition rib 13 is attached to the first sealing surface section 22A, the space enclosed by the oil chamber wall 111, the closed elastic valve 30, the rotor plate 23, the first sealing surface section 22A and the partition rib 13 forms a sealed chamber NP for stopping the relative rotation of the sleeve 10 and the rotating shaft 20; once the tilted toilet cover board rebounds and turns downwards to make the shaft sleeve 10 have the action of reversely rotating relative to the rotating shaft 20, namely: once the partition rib 13 slides slightly along the first sealing surface section 22A in the direction of the fast oil passing groove 221, the sealing cavity NP expands to generate an increased siphon negative pressure, and the siphon negative pressure belongs to static damping due to the flow of undamped oil, the siphon negative pressure in the sealing cavity NP acts on the rotor plate 23 where the partition rib 13 and the valve hole 231 are blocked, and the siphon negative pressure in the sealing cavity NP actuates the partition rib 13 to automatically rotate and reset the shaft sleeve 10, so as to eliminate the negative pressure generated in the sealing cavity NP, and thus, the shaft sleeve 10 is braked by the siphon negative pressure in the sealing cavity NP, and the toilet cover plate is in a stable inclined state.

The principle that the manual downward-turning toilet cover plate releases the sealed cavity NP and enables the toilet cover plate to turn down quickly is as follows:

as shown in fig. 9 (d1) and fig. 10 (d2), the toilet lid in the tilted state is manually turned downward with a certain force, the toilet lid drives the shaft sleeve 10 to rotate reversely with respect to the fixed rotating shaft 20, so as to overcome the siphon negative pressure of the sealing cavity NP, when the partition rib 13 slides from the first sealing surface section 22A to the fast oil passing groove 221, the sealing cavity NP is opened by the fast oil passing groove 221, the damping oil enters the sealing cavity NP from the fast oil passing groove 221 to eliminate the siphon negative pressure, so that the damping oil on both sides of each partition rib 13 can pass, the hydraulic pressure difference cannot be formed on both sides of each partition rib 13, the shaft sleeve 10 rotates reversely and quickly with respect to the fast oil passing groove 221 section of the fixed rotating shaft 20, and the toilet lid can be turned downward quickly.

The working principle that the toilet cover plate is turned down rapidly to be turned down slowly is as follows:

after the sealed cavity NP is released, as shown in the structural state (d) of fig. 8, after the hand is released, the downward-turned toilet lid plate drives the shaft sleeve 10 to continue to rotate reversely relative to the fixed rotating shaft 20 under the action of self gravity, the spacer rib 13 rotates clockwise along the fast oil passing groove 221 of the sliding inner shaft section 22, the damping oil passes through the fast oil passing groove 221 to prevent the two sides of the spacer rib 13 from forming hydraulic pressure difference, so that the shaft sleeve 10 rotates reversely and fast relative to the fast oil passing groove 221 of the fixed rotating shaft 20, and the toilet lid plate can be turned down quickly; as shown in fig. 11, when the partition rib 13 sweeps through the fast oil passing groove 221 to be attached to the second sealing surface section 22B for sliding, the second sealing surface section 22B, the partition rib 13, the oil cavity wall 111, the elastic valve 30 for sealing oil passing, and the rotor plate 23 enclose a hydraulic cavity capable of passing oil slowly only through the slow oil permeating groove 122 on the partition plate 12, as shown in (e) to (f) of fig. 8, the hydraulic damping oil in the hydraulic cavity is buffered and released through the slow oil permeating groove 122 to attenuate the oil pressure, and the hydraulic pressure difference between the two sides of the rotor plate 23 is attenuated, i.e. dynamic damping attenuation, that is, the hydraulic pressure difference damping braking shaft sleeve 10 forming attenuation on the two sides of the partition rib 13 continues to rotate slowly and reversely until the valve plate 34 of the elastic valve 30 on the rotor plate 23 butts against the side surface of the partition rib 13, so that the toilet cover can slowly fall back and cover under the effect of hydraulic damping; the rotation-coupled state of the sleeve 10 and the rotation shaft 20 is restored to the initial configuration state of fig. 7 (a).

As shown in fig. 12, the stroke of the inner spacer 13 of the sleeve 10 sliding against the second sealing surface section 22B of the fixed rotating shaft 20 is a damping stroke DT, i.e. a hydraulic damping stroke, and the angle corresponding to the hydraulic damping stroke DT is the angle of the toilet lid panel for damping the toilet lid panel from falling.

As shown in fig. 1, 2, 4 and 5, when the damping falling speed of the toilet cover needs to be adjusted, the damping falling speed of the toilet cover can be adjusted by rotating the adjusting nut 70 at the rear end of the shaft sleeve 10, changing the interval between the end face 71 of the adjusting nut and the partition plate 12, changing the opening of the flow passage of the damping oil communicated with the two sides of each partition rib 13 through the throttling opening 131, and changing the damping speed of the damping oil pressure, so as to adjust the damping rotating speed of the shaft sleeve 10 relative to the rotating shaft 20 and change the slow falling time of the toilet cover.

The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore, all equivalent technical solutions should also fall within the scope of the present invention, which is defined by the claims.

Claims (8)

1. The utility model provides a rotatory buffer of hydraulic pressure with quiet dynamic binary damping, contain one axle sleeve (10) that have oil pocket (11) and one with oil pocket (11) sealed rotating deflection oil complex pivot (20), inner shaft section (22) radial symmetry of bulge loop (21) one side on pivot (20) sets up two and is used for deflecting the pterygoid lamina (23) of oil, two of symmetry on oil pocket wall (111) separate muscle (13) and inner shaft section (22) footpath face can conflict the laminating and limit pterygoid lamina (23) rotation range, its characterized in that:

each rotary wing plate (23) is provided with a valve hole (231) for one-way oil passing, and each rotary wing plate (23) is embedded and fixed with an elastic valve (30) which is in close contact with the oil cavity wall (111) in a sliding fit and seals the valve hole (231); the shaft sleeve (10) rotates in the positive direction relative to the rotating shaft (20), and the valve hole (231) pushes the elastic valve (30) to elastically deform by one-way oil passing fluid pressure so as to open the valve hole (231) to release the fluid pressure; the shaft sleeve (10) rotates reversely relative to the rotating shaft (20), and the elastic valve (30) is deformed and restored to close the valve hole (231);

on the shaft sleeve (10) rotating reversely relative to the rotating shaft (20), a first sealing surface section (22A) jointed with the spacing rib (13), a quick oil passing groove (221) in clearance fit with the spacing rib (13) and a second sealing surface section (22B) jointed with the spacing rib (13) are sequentially arranged on the radial surface of an inner shaft section (22) from the root of one rotor wing plate (23) to the root of the other rotor wing plate (23) in a connecting mode;

on the reverse rotation of the shaft sleeve (10) relative to the rotating shaft (20), when the spacer ribs (13) are jointed with the first sealing surface section (22A), a space enclosed by the oil cavity wall (111), the elastic valve (30), the rotary wing plate (23), the first sealing surface section (22A) and the spacer ribs (13) forms a sealing cavity (NP) for braking the relative rotation of the shaft sleeve (10) and the rotating shaft (20); when the spacer ribs (13) and the second sealing surface section (22B) are attached and slide, the rotor wing plates (23) are matched with the slow oil seepage grooves (122) in the shaft sleeve (10) to pass oil at a slow speed, so that the hydraulic pressure difference generated on two sides of the rotor wing plates (23) is attenuated, and the shaft sleeve (10) rotates slowly.

2. A hydraulic rotary damper with dynamic and static double damping as defined in claim 1 wherein: the elastic valve (30) is provided with a clamping groove (31) which is in nested fit with the rotary wing plate (23), an oil passing notch (32) which is avoided from one end of the valve hole (231), and a valve plate (34) which is elastically blocked from the other end of the valve hole (231), and the elastic valve (30) is provided with a gap (33) which does not influence the elastic deflection, swinging and deformation of the valve plate (34).

3. A hydraulic rotary damper with dynamic and static double damping as defined in claim 1 wherein: the oil cavity (11) is internally provided with a partition plate (12) which is vertically connected with the partition rib (13), the middle of the partition plate (12) is provided with a bearing hole (121), and the end of the inner shaft section (22) is provided with a pivot (24) which is in rotating fit with the bearing hole (121).

4. A hydraulic rotary damper with dynamic and static double damping as defined in claim 3 wherein: the axial end face of the rotor wing plate (23) is in sliding contact with the partition plate (12), the two concave slow oil seepage grooves (122) are symmetrically formed in the partition plate (12), and when the axial end face of the rotor wing plate (23) rotates to the position of the slow oil seepage grooves (122), damping oil can flow to the other face from one face of the rotor wing plate (23) through the slow oil seepage grooves (122).

5. A hydraulic rotary damper with dynamic and static double damping as defined in claim 3 wherein: the bearing holes (121) at two sides of each partition rib (13) on the partition plate (12) are provided with throttling ports (123) which can enable damping oil at two sides of the partition rib (13) to be communicated at the rear side of the partition plate (12), and the rear part of the shaft sleeve (10) is provided with an adjusting nut (70) which is used for sealing or adjusting the communicating opening of all the throttling ports (123).

6. A hydraulic rotary damper with dynamic and static double damping as defined in claim 5 wherein: the rear part of the shaft sleeve (10) is provided with a threaded hole (14) which is screwed with the adjusting nut (70), and the end surface (71) of the adjusting nut (70) can be tightly attached to the partition plate (12) to seal the throttling opening (123) or the end surface (71) is separated from the partition plate (12) by rotating the adjusting nut (70) to adjust the opening communicated with all the throttling openings (123).

7. A hydraulic rotary damper with dynamic and static double damping as defined in claim 6 wherein: the adjusting nut (70) is provided with a rear sealing ring (72), and the rear sealing ring (72) is sealed between the sliding column section of the adjusting nut (70) and the smooth section wall on the inner side of the threaded hole (14).

8. A hydraulic rotary damper with dynamic and static double damping as defined in claim 1 wherein: the sealing device also comprises a backing ring (40), a front sealing ring (50) and a gland (60), wherein the backing ring (40) is sleeved on the rotating shaft (20) and pressed on the outer ring surface of the convex ring (21); the gland (60) is sleeved on the rotating shaft (20) to press the backing ring (40), the shaft sleeve (10) is welded and fixed with the oil cavity (11), and the front sealing ring (50) is sealed between the gland (60) and the rotating shaft (20).

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