CN111927919B

CN111927919B - Self-variable force hydraulic damper

Info

Publication number: CN111927919B
Application number: CN202011003752.5A
Authority: CN
Inventors: 毛黎娜; 李�荣
Original assignee: Kasico Shock Absorber Manufacture Co ltd
Current assignee: Kasico Shock Absorber Manufacture Co ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-05-11
Anticipated expiration: 2040-09-22
Also published as: CN111927919A

Abstract

The application relates to a self-variable force hydraulic damper, which comprises a shell assembly, a piston rod and a piston assembly; the piston assembly is arranged on the piston rod and sequentially comprises a first cushion piece, a first disc-shaped spring, a first valve plate, a variable position piston, a second valve plate, a second disc-shaped spring and a second cushion piece; the variable position piston is provided with a first end surface and a second end surface, and is also provided with a first flow through hole and a second flow through hole which penetrate through the first end surface and the second end surface; the first valve plate is pressed on the first end face under the action of the first disc-shaped spring, and covers the first flow through hole and does not cover the second flow through hole; the second valve plate is pressed on the second end face under the action of the second disc spring, and the second valve plate covers the second through hole and does not cover the first through hole. This application has the comparatively ideal effect of buffering wind and shake ability.

Description

Self-variable force hydraulic damper

Technical Field

The application relates to the field of shock absorbers, in particular to a hydraulic damper.

Background

In a solar photovoltaic power generation system, a solar photovoltaic panel can automatically track along with the irradiation angle of solar energy under a program set by a tracker. The hydraulic damper is applied to a solar photovoltaic power generation system and used for supporting a solar photovoltaic panel and buffering wind and vibration. The hydraulic damper applied to the solar photovoltaic power generation system can buffer wind shock generated by 7-8-level strong wind.

In view of the above-mentioned related art, the inventor believes that when the solar photovoltaic power generation system faces high wind of a higher level, the hydraulic damper cannot buffer the wind shock generated by the high wind of this level.

Disclosure of Invention

In order to improve the ability that hydraulic damper cushioned the wind and shake, this application provides a hydraulic damper of autokinetic force.

The application provides a from variable force hydraulic damper adopts following technical scheme:

a self-variable force hydraulic damper comprises a shell assembly, a piston rod and a piston assembly; the piston assembly is arranged on the piston rod and sequentially comprises a first cushion piece, a first disc-shaped spring, a first valve plate, a variable position piston, a second valve plate, a second disc-shaped spring and a second cushion piece; the variable position piston is provided with a first end surface and a second end surface, and is also provided with a first flow through hole and a second flow through hole which penetrate through the first end surface and the second end surface; the first valve plate is pressed on the first end face under the action of the first disc-shaped spring, and covers the first flow through hole and does not cover the second flow through hole; the second valve plate is pressed on the second end face under the action of the second disc spring, and the second valve plate covers the second through hole and does not cover the first through hole.

By adopting the technical scheme, the self-variable force hydraulic damper is supported on the solar photovoltaic panel, and the piston rod of the self-variable force hydraulic damper generates different actions along with the rotation of the solar photovoltaic panel, namely the piston rod is compressed or stretched. The piston rod is compressed when the piston rod moves towards the tail end of the shell assembly, and the piston rod is stretched when the piston rod moves towards the front end of the shell assembly.

When the solar photovoltaic panel connected with the self-force-changing hydraulic damper bears wind power, wind energy pressure acting on the solar photovoltaic panel is converted into tensile force or compressive force applied to the piston rod. At this time, the first valve plate or the second valve plate can overcome the pressure of the first disc-shaped spring or the pressure of the second disc-shaped spring under the action of the hydraulic oil, so that the first disc-shaped spring and the second disc-shaped spring deform to increase the damping force of the self-variable force hydraulic damper. When the self-variable force hydraulic damper bears large wind power, the first disc-shaped spring and the second disc-shaped spring can be completely elastically deformed and cling to the surface of the first valve plate or the second valve plate, so that the damping force of the self-variable force hydraulic damper at the moment is large, and the wind shock buffering capacity of the hydraulic damper is improved.

Optionally, the first conical surface of the first disc-shaped spring faces the first valve plate; and the second conical surface of the second disc spring faces the second valve plate.

By adopting the technical scheme, when the solar photovoltaic panel connected with the self-variable force hydraulic damper bears wind power, the edge area corresponding to the first flow through hole or the second flow through hole in the first valve plate and the second valve plate can deform, so that a gap is formed between the first valve plate and the variable position piston or between the second valve plate and the variable position piston, hydraulic oil can flow through the gap, the requirement on the flow of the hydraulic oil in the state is met, and the buffering effect of the self-variable force hydraulic damper is improved.

At the moment, the first valve plate enables the first disc-shaped spring or the second valve plate enables the second disc-shaped spring to deform, and the damping force of the self-force-variable hydraulic damper is improved.

Optionally, a first throttling groove for allowing the fluid in the first through hole to flow out is formed in the first valve plate; and the second valve plate is provided with a second throttling groove for the fluid in the second through hole to flow out.

By adopting the technical scheme, when the self-variable force hydraulic damper is in a windless or breeze state, when the piston rod synchronously acts along with the rotation of the solar photovoltaic panel, the speed of the piston rod at the moment is lower, the flow of hydraulic oil in the shell assembly is smaller, so that the first valve plate and the second valve plate do not need to deform, the setting of the first throttling groove and the second throttling groove can meet the requirement of the circulation of the hydraulic oil, the flow of the hydraulic oil passing through the variable position piston is more stable in the windless or breeze state of the self-variable force hydraulic damper, the damping force provided by the self-variable force hydraulic damper is more stable, and the damping performance of the self-variable force hydraulic damper is improved.

Optionally, the first valve plate is composed of at least two stacked first single sheets, a first throttling notch is formed in the valve plate, which is attached to the variable position piston, in the first valve plate, and the first throttling groove is formed in the first valve plate; the second valve plate is composed of at least two stacked second single sheets, a second throttling notch is formed in the valve plate, attached to the variable position piston, in the second valve plate, and the second throttling groove is formed in the second valve plate.

By adopting the technical scheme, the flow area of the first throttling groove/the second throttling groove is controlled by controlling the thickness of the first valve plate/the second valve plate, so that the flow of hydraulic oil passing through the variable position piston in a windless or breezy state of the self-variable force hydraulic damper is controlled, and the damping force provided by the self-variable force hydraulic damper is more stable.

The structure of the first valve plate and the second valve plate is set, so that the structural strength of the first valve plate and the second valve plate is ideal, the probability that the first valve plate is damaged due to extrusion of the first disc-shaped spring in the deformation process of the first disc-shaped spring is reduced, and the service life of the first disc-shaped valve plate is prolonged; the probability that the second valve plate is damaged due to the fact that the second disc spring extrudes in the deformation process of the second disc spring is reduced, and the service life of the second valve plate is prolonged.

Optionally, the first flow through holes are inclined holes and are arranged obliquely outward along the direction from the first end face to the second end face; the second flow through holes are also inclined holes and are arranged obliquely outwards along the direction from the second end face to the first end face.

Through adopting above-mentioned technical scheme, satisfied first circulation hole and closed and not closed by the second valve block lid at the second terminal surface by first valve block lid at first terminal surface, second circulation hole is not closed by the second valve block lid at first terminal surface and the second circulation hole is closed by the second valve block at the second terminal surface and is closed the limiting factor, first circulation hole and second circulation hole are the settlement of inclined hole, simple structure, and processing is more convenient.

Optionally, the variable position piston is provided with a first ring groove on the first end surface, the first flow through hole is communicated with the inner wall of the first ring groove, the first throttling groove is communicated with the first ring groove, and the first ring groove is covered by the first valve plate;

the variable-position piston is provided with a second annular groove on the second end surface, the second flow through hole is communicated with the inner wall of the second annular groove, the second throttling groove is communicated with the second annular groove, and the second valve plate covers the second annular groove.

Through adopting above-mentioned technical scheme, the settlement of first annular and second annular, make the effort of hydraulic oil effect on first valve block and second valve block comparatively even, when the border region of ordering about first valve block/second valve block takes place to warp, make first valve block/second valve block extrude first dish type spring or second dish type spring under the effect of even hydraulic pressure, thereby make the deformation of first dish type spring and second dish type spring comparatively even, help promoting the internal stability of piston assembly, and at external wind force sudden change in-process, above-mentioned autokinetic force hydraulic damper can make quick, stable reaction, help reducing the probability of the inside trouble that takes place of autokinetic force hydraulic damper.

Optionally, the tail end of piston rod has the confession the installation section that the piston assembly installed and the top of installation section is formed with the ladder face, the piston rod still be equipped with the piston assembly compresses tightly mounting nut on the ladder face.

By adopting the technical scheme, the piston assembly is arranged at the tail end of the piston rod, the structure is simple, the assembly is convenient, and the probability that the piston assembly falls off from the tail end of the piston rod is low.

Optionally, the housing assembly includes an outer cylinder, a bottom cover mounted at the tail end of the outer cylinder, a front cover mounted at the front end of the outer cylinder, a guide seal assembly mounted at the front end of the outer cylinder and guiding the piston rod, and a working cylinder located in the outer cylinder and matched with the piston assembly; a compression valve assembly is installed at the lower end of the working cylinder, and an oil storage cavity is formed between the working cylinder and the outer cylinder body; the guide sealing assembly is provided with a first through hole for the piston rod to extend out, and a first guide sleeve, an oil seal and a second guide sleeve are sequentially arranged on the inner wall of the first through hole along the extending direction of the piston rod.

By adopting the technical scheme, because the requirement on the sliding precision of the piston rod and the piston assembly of the self-variable force hydraulic damper is higher, the first guide sleeve and the second guide sleeve are arranged in the guide sealing assembly to help to ensure the sliding precision of the piston rod.

Optionally, the direction seal assembly is in first uide bushing with still be equipped with the oil return annular between the oil blanket, the direction seal assembly still is equipped with intercommunication oil return annular with the oil gallery return gallery of oil reservoir.

By adopting the technical scheme, when the piston rod is stretched and extends out of the shell assembly, part of the hydraulic oil left in the piston rod can sequentially pass through the first guide sleeve, the oil seal and the second guide sleeve, and part of the hydraulic oil is blocked by the first guide sleeve and is left in the working cylinder; hydraulic oil through first uide bushing can be scraped by the oil blanket to supplement to storing the oil intracavity through oil return ring groove and oil gallery, and store the hydraulic oil liquid of oil intracavity and can compensate to the working cylinder in through the compression valve assembly, help the recycle to the hydraulic oil that is scraped by the oil blanket.

Optionally, the guide sealing assembly includes a first guide member sealingly mounted in the inner cavity of the outer cylinder, and a second guide member mounted in the inner cavity of the outer cylinder and located at an outer end of the first guide member; the first guide piece is provided with a first inserting part inserted in the working cylinder, and the end face of the first inserting part is provided with a first guide groove for mounting the first guide sleeve; a positioning slot is formed in one end, facing the second guide piece, of the first guide piece, the second guide piece is arranged at one end of the first guide piece, and an oil seal ring groove for mounting the oil seal is formed in the bottom surface of the positioning slot; the second guide piece is provided with a second inserting part inserted into the positioning slot, and a second guide groove for mounting the second guide sleeve is formed in the end face, facing the first guide piece, of the second inserting part.

Through adopting above-mentioned technical scheme, not only made things convenient for the installation of first uide bushing, oil blanket and second uide bushing, cooperation between first uide and the outer cylinder body is injectd moreover, cooperation between second uide and the outer cylinder body is injectd and cooperation between first uide and the second uide is injectd and is helped improving the sealed assembly of direction to the precision of sliding of piston rod to make piston assembly remove more steadily in the working cylinder.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the self-variable force hydraulic damper bears larger wind power, the first disc-shaped spring and the second disc-shaped spring can be completely elastically deformed and cling to the surface of the first valve plate or the second valve plate, so that the damping force of the self-variable force hydraulic damper is larger at the moment, and the wind shock buffering capacity of the hydraulic damper is improved;

2. when the solar photovoltaic damper is in a windless or breeze state, the piston rod synchronously moves along with the rotation of the solar photovoltaic panel, at the moment, the speed of the piston rod is low, the hydraulic oil circulation flow in the self-variable-force hydraulic damper is small, the setting of the first throttling groove and the second throttling groove can meet the requirement of hydraulic oil circulation, the damping force provided by the self-variable-force hydraulic damper is more stable, and the damping performance of the self-variable-force hydraulic damper is improved;

3. first annular and the second annular that sets up on the variable position piston for the effort of hydraulic oil effect on first valve block and second valve block is comparatively even, helps promoting piston assembly's internal stability, and at the external wind force sudden change in-process, above-mentioned from variable force hydraulic damper can make quick, stable reaction, helps reducing the probability of the inside trouble that takes place of self-variable force hydraulic damper.

Drawings

Fig. 1 is a schematic diagram of the position relationship between a solar photovoltaic panel and a self-variable force hydraulic damper before starting.

Fig. 2 is a schematic diagram of the position relationship between the solar photovoltaic panel and the self-variable hydraulic damper after starting and when the sun just rises.

Fig. 3 is a schematic diagram showing the position relationship between the solar photovoltaic panel and the self-variable force hydraulic damper after sunset.

Fig. 4 is a schematic structural view of the self-varying force hydraulic damper.

FIG. 5 is a schematic view of the front cover, outer cylinder, guide seal assembly and piston rod in combination.

Figure 6 is a schematic view of the cooperation of the outer cylinder, the mandrel, the piston rod and the piston assembly.

Fig. 7 is a partially enlarged schematic view at a in fig. 6.

Fig. 8 is a partially enlarged schematic view at B in fig. 6.

Fig. 9 is a partially enlarged schematic view at C in fig. 4.

Description of reference numerals: 11. a self-varying force hydraulic damper; 12. a solar photovoltaic panel; 13. a solar panel holder; 14. a base support; 2. a housing assembly; 21. an outer cylinder body; 211. limiting and flanging; 2111. a first limit plane; 22. a front cover; 221. a first cover body; 2211. a fixing ring; 222. a second cover body; 2221. a second through hole; 223. a dust ring; 23. a bottom cover; 231. a lower connecting portion; 232. a bearing mounting hole; 24. a working cylinder; 3. a piston rod; 31. an installation section; 32. a step surface; 33. a stud segment; 34. mounting a nut; 35. a limiting ring groove; 36. a limiting rubber ring; 37. a limiting ring; 371. clamping the ring groove; 4. a piston assembly; 41. a first padding; 42. a first disc-shaped spring; 43. a first valve plate; 431. a first monolithic sheet; 4311. a first restriction orifice; 432. a first throttle groove; 44. a variable position piston; 441. a first end face; 442. a second end face; 443. a first flow through hole; 444. a second flow through hole; 445. a first ring groove; 446. a second ring groove; 45. a second valve plate; 451. a second monolithic sheet; 4511. a second restriction orifice; 452. a second throttle groove; 46. a second disc spring; 47. a second pad; 5. a compression valve; 6. a hoisting ring bushing assembly; 7. a bearing assembly; 8. a guide seal assembly; 81. a first guide member; 811. a first insertion part; 812. a first guide groove; 813. positioning the slot; 814. an oil seal ring groove; 815. an oil return ring groove; 816. an oil return hole; 817. sealing the ring groove; 818. a seal ring; 82. a second guide member; 821. a second insertion part; 822. a second guide groove; 823. a second limit plane; 83. a first through hole; 84. a first guide sleeve; 85. oil sealing; 86. a second guide sleeve; 91. an oil storage chamber; 92. a working chamber; 921. a first oil chamber; 922. a second oil chamber.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses a self-variable force hydraulic damper 11 which is applied to a solar photovoltaic power generation system. Referring to fig. 1, the front end of the piston rod 3 of the self-force-changing hydraulic damper 11 is hinged to a solar panel holder 13 on which a solar photovoltaic panel 12 is mounted, and the tail end of the outer cylinder 21 of the self-force-changing hydraulic damper 11 is hinged to a base bracket 14. The solar photovoltaic power generation system is further provided with a driving mechanism for driving the solar panel fixing frame 13 to rotate regularly, so that the solar photovoltaic panel 12 can always face the sun direction, and the power generation efficiency of the solar photovoltaic panel 12 is improved.

Referring to fig. 1, a schematic diagram of the position relationship between the solar photovoltaic panel 12 and the self-variable hydraulic damper 11 before starting up is shown. At this time, the solar photovoltaic panel 12 is arranged as a horizontal plate.

Referring to fig. 2, the position relationship between the solar photovoltaic panel 12 and the self-energizing hydraulic damper 11 is schematically shown after the solar photovoltaic panel is turned on and when the sun just rises. At this time, the solar photovoltaic panel 12 faces the rising direction of the sun, and the acute angle formed by the solar photovoltaic panel 12 and the horizontal plane is 60 °.

Referring to fig. 3, a schematic diagram of the position relationship between the solar photovoltaic panel 12 and the self-energizing hydraulic damper 11 after sunset. At this time, the solar photovoltaic panel 12 is laid down toward the sun, and the acute angle formed by the solar photovoltaic panel 12 and the horizontal plane is 60 °.

Referring to fig. 4, the self-varying force hydraulic damper 11 includes a housing assembly 2, a piston rod 3, a piston assembly 4, a compression valve 5, a bail bushing assembly 6, and a bearing assembly 7.

Referring to fig. 4, the housing assembly 2 includes an outer cylinder 21, a front cover 22 mounted on a front end of the outer cylinder 21, a bottom cover 23 mounted on a rear end of the outer cylinder 21, a guide seal assembly 8 mounted on a front end of the outer cylinder 21 and guiding the piston rod 3, and a cylinder 24 mounted in the outer cylinder 21 and engaged with the piston assembly 4.

Referring to fig. 5, the outer cylinder 21 is a hollow cylindrical cylinder, and a limit flange 211 that is folded inward and perpendicular to the axis of the outer cylinder 21 is provided at the front end of the outer cylinder 21. The inner side of the limit flange 211 is provided with a first limit plane 2111 for the guide seal assembly 8 to abut against and limit.

Referring to fig. 5, the front cover 22 includes a first cover 221 and a second cover 222. The first cover 221 has a fixing ring 2211 fitted to the outer wall of the front end of the outer cylinder 21. The fixing ring is fixed to the front cover 22 by welding through the fixing ring. A dust-proof ring groove is formed between the inner side of the first cover 221 and the front cover 22, a dust-proof ring 223 is mounted in the dust-proof ring groove, and the inner ring end surface of the dust-proof ring 223 has a dust-proof lip abutting against the outer wall of the piston rod 3.

Referring to fig. 5, the second cover 222 is fixed to the side of the first cover 221 away from the outer cylinder 21 by welding, and has a second through hole 2221 through which the piston rod 3 extends. Wherein, the piston rod 3 and the second through hole 2221 are in clearance fit. The second cover 222 is set to protect the dust ring 223 mounted in the first cover 221, and the probability of damage to the dust lip of the dust ring 223 due to external impact is reduced.

Referring to fig. 4, the rear cover is welded and fixed to the bottom end of the outer cylinder 21, and hermetically covers the bottom end opening of the outer cylinder 21. The rear cover is fixed by welding a lower connecting portion 231 at the center of the surface facing away from the outer cylinder 21, the axis of the lower connecting portion 231 coincides with the axis of the outer cylinder 21, and the lower connecting portion 231 further has a bearing mounting hole 232 for mounting the bearing assembly 7. When the self-standing hydraulic damper is mounted, the bearing assembly 7 is mounted on a base bracket 14 (see fig. 1) of the solar photovoltaic power generation system.

Referring to fig. 4, the compression valve 5 is installed on a side of the bottom cover 23 facing the inner cavity of the outer cylinder body 21, and the operating cylinder 24 is supported between the compression valve 5 and the guide seal assembly 8 and partitions the inner cavity of the outer cylinder body 21 into an oil reservoir chamber 91 between the outer cylinder body 21 and the operating cylinder 24 and an operating chamber 92 within the operating chamber 92. The compression valve 5 controls the balance between the oil pressure in the working chamber 92 and the oil pressure in the oil reservoir chamber 91.

Referring to fig. 5, the guiding and sealing assembly 8 has a first through hole 83 for extending the piston rod 3, and is used for guiding and sealing the sliding movement of the piston rod 3, so as to ensure the sliding accuracy of the piston rod 3 and reduce the probability of leakage of hydraulic oil in the housing assembly 2. The guide sealing assembly 8 comprises a first guide part 81 and a second guide part 82 in sequence along the direction close to the limit flange 211.

The first guide 81 has a first fitting portion 811 fitted into the cylinder 24. The first guide 81 has a first guide groove 812 formed in an end surface of the first mating part 811, and a first guide sleeve 84 fitted to the piston rod 3 is fitted in the first guide groove 812. The first guide 81 has a positioning insertion groove 813 on a side facing the second guide 82, an oil seal ring groove 814 is formed on a bottom surface of the positioning insertion groove 813, and an oil seal 85 is mounted in the oil seal ring groove 814.

The first guide member 81 is further provided with a return oil ring groove 815 between the first guide groove 812 and the oil seal ring groove 814, and is further provided with a return oil hole 816 that communicates the return oil ring groove 815 and the oil reservoir chamber 91. The oil return ring groove 815 and the oil return hole 816 are set so that the hydraulic oil scraped off by the oil seal 85 can flow into the oil storage chamber 91, which contributes to the recycling of the hydraulic oil.

The outer wall of the first guide 81 is further provided with two sealing ring grooves 817 at intervals, and a sealing ring 818 matched with the outer cylinder 21 is arranged in each of the two sealing ring grooves 817.

The second guide 82 has a second insertion part 821 inserted into the positioning insertion groove 813. The second guide 82 has a second guide groove 822 formed in an end surface of the second insertion part 821, and a second guide sleeve 86 fitted to the piston rod 3 is fitted in the second guide groove 822. The second guide 82 also has a second limit plane 823 which mates with the first limit plane 2111.

Referring to fig. 4 and 5, the piston rod 3 is a cylindrical metal cylinder, and is slidably and sealingly mounted in the first through hole 83 of the guide seal assembly 8. The hoisting ring bush assembly 6 is arranged at the top end of the piston rod 3. When the self-standing hydraulic damper is mounted, the bail bushing assembly 6 is mounted on a solar panel mount 13 (see fig. 1) of the solar photovoltaic power generation system.

Referring to fig. 6, the rear end of the piston rod 3 has a mounting section 31 for mounting the piston assembly 4, the mounting section 31 has an outer diameter smaller than the entire outer diameter of the piston rod 3, and a stepped surface 32 is formed on the top surface of the mounting section 31. The bottom end of the mounting section 31 is also coaxially provided with a stud section 33 with an outer diameter smaller than that of the mounting section 31, and the stud section 33 is provided with a mounting nut 34 for pressing the piston assembly 4 on the stepped surface 32.

Referring to fig. 6, the piston assembly 4 includes, in order along the mounting section 31 mounted to the piston rod 3, a first pad 41, a first disc spring 42, a first valve plate 43, a variable position piston 44, a second valve plate 45, a second disc spring 46, and a second pad 47. The first and second pad members 41 and 47 are annular rubber gaskets to enable the piston assembly 4 to be better secured to the rear end of the piston rod 3.

The thickness of the piston assembly 4 is greater than the length of the mounting section 31, when the mounting nut 34 is mounted on the screw column section 33, the mounting nut 34 drives the first disc spring 42 and the second disc spring 46 to have a pre-deformation amount, and the piston assembly 4 has a pre-tightening internal stress, so that the first valve plate 43 and the second valve plate 45 are both pressed on the end surface of the variable position piston 44.

Referring to fig. 4 and 6, when the piston assembly 4 is mounted to the rear end of the piston rod 3, the piston assembly 4 divides the working chamber 92 into a first oil chamber 921 and a second oil chamber 922. Wherein the first oil chamber 921 is located on a side close to the front cover 22; the second oil chamber 922 is located on a side near the rear cover.

The variable position piston 44 has a first end face 441 and a second end face 442. The first end surface 441 is an end surface of the variable position piston 44 close to the first valve plate 43; the second end surface 442 may be an end surface of the piston near the second valve plate 45. The variable position piston 44 has a first flow passage 443 and a second flow passage 444 penetrating the first end surface 441 and the second end surface 442. The first and second flow holes 443, 444 are oblique holes. The first flow through holes 443 are arranged obliquely in the direction of the outer wall of the variable position piston 44 in the direction from the first end surface 441 to the second end surface 442; the second flow holes 444 are arranged obliquely in the direction from the second end surface 442 to the first end surface 441 toward the outer wall of the variable position piston 44. The number of the first flow holes 443 and the number of the second flow holes 444 may be designed and arranged according to requirements. In the present embodiment, the variable position piston 44 has one first flow hole 443 and two second flow holes 444.

The variable position piston 44 is further provided with a first ring groove 445 at the first end surface 441, and the top of the first flow through hole 443 communicates with the inner wall of the first ring groove 445. The variable position piston 44 also has a second ring groove 446 formed on the second end surface 442, and the bottom of the second flow passage 444 is connected to the inner wall of the second ring groove 446.

Referring to fig. 6 and 7, the first valve sheet 43 covers the first ring groove 445 without covering the opening of the second flow hole 444 on the first end surface 441. The first valve sheet 43 is composed of at least two first single sheets 431 stacked on top of each other. In the present embodiment, the number of the first single pieces 431 in the first valve sheet 43 is five. The first single piece 431 attached to the variable position piston 44 in the first valve plate 43 is provided with a first throttling notch 4311, so that a first throttling groove 432 communicated with the first annular groove 445 is formed in the first valve plate 43.

Referring to fig. 6 and 8, the second valve plate 45 covers the second ring groove 446, and does not cover the opening of the first flow through hole 443 on the second end surface 442. The second valve sheet 45 is composed of at least two second single sheets 451 stacked one on another. In the present embodiment, the number of the second individual pieces 451 in the second valve piece 45 is five. The second single piece 451 of the second valve plate 45, which is attached to the variable position piston 44, is provided with a second throttle notch 4511, so that a second throttle groove 452 communicating with the first annular groove 445 is formed in the second valve plate 45.

Referring to fig. 6, the first disc spring 42 is supported between the first valve plate 43 and the first pad 41, and presses the first valve plate 43 against the first end surface 441 of the variable position piston 44. The conical surface of the first disc spring 42 is disposed toward the variable position piston 44, and forms a first one-way throttling structure at the first end surface 441 of the variable position piston 44 in combination with the first valve plate 43.

The second disc spring 46 is supported between the second valve plate 45 and the first pad 41, and presses the second valve plate 45 against the second end surface 442 of the variable position piston 44. The conical surface of the second disc spring 46 is disposed toward the variable position piston 44 and forms a second one-way restriction at the second end face 442 of the variable position valve body.

Referring to fig. 4 and 9, the piston rod 3 is further provided with a stop collar 37 above the piston assembly 4. The piston rod 3 is provided with a limiting ring groove 35 and a limiting rubber ring 36 is arranged at the limiting ring groove 35. The end surface of the limiting ring 37 facing the piston assembly 4 is provided with a clamping ring groove 371 for clamping the limiting rubber ring 36.

With reference to fig. 1 to 9, an implementation principle of a self-changing hydraulic damper 11 according to an embodiment of the present application is as follows: after the self-variable-force hydraulic damper 11 is installed in a solar photovoltaic power generation system, the front end of a piston rod 3 of the self-variable-force hydraulic damper 11 is hinged to a solar panel fixing frame 13 through a lifting ring bushing assembly 6, a bottom cover 23 of the self-variable-force hydraulic damper 11 is hinged to a base support 14 through a bearing assembly 7, and the piston rod 3 of the self-variable-force hydraulic damper 11 synchronously acts along with the rotation of a solar photovoltaic panel 12 and provides supporting force and damping force for the solar photovoltaic panel 12.

The self-changing hydraulic damper 11 provides three support modes, namely a no-wind mode, a strong-wind mode and a super-strong-wind mode, according to the wind speed of the environment where the solar photovoltaic panel 12 is located.

When the solar photovoltaic panel 12 is in a windless or breezy environment, the wind pressure on the solar photovoltaic panel 12 is very little, and the solar photovoltaic panel 12 rotates at a constant speed under the action of the driving mechanism. At the moment, the linear velocity of the piston rod 3 is low, and the general linear velocity is kept at 0.005-0.010 m/s, so that the self-variable force hydraulic damper 11 is in a windless mode. At this time, the first valve plate 43 and the second valve plate 45 in the piston assembly 4 are not deformed, and the first disc spring 42 and the second disc spring 46 are deformed in the pre-compression state. When the piston rod 3 is compressed, the hydraulic oil is circulated from the second oil chamber 922 to the first oil chamber 921 through the first circulation hole 443, the first ring groove 445, and the first throttle groove 432; when the piston rod 3 is stretched, the hydraulic oil passes through the second flow hole 444, the second annular groove 446, and the second throttle groove 452 from the first oil chamber 921 to the second oil chamber 922.

When the solar photovoltaic panel 12 is in a strong wind environment, the solar photovoltaic panel 12 is subjected to pressure given by strong wind, the piston rod 3 is subjected to impact load force given by the solar panel fixing frame 13, the piston rod 3 and the piston assembly 4 move in the shell assembly 2, and as the damping force provided by the self-variable force hydraulic damper to the solar panel fixing frame 13 is related to the moving speed of the piston rod 3, the faster the moving speed of the piston rod 3 is, the greater the damping force provided by the self-variable force hydraulic damper to the solar panel fixing frame 13 is. At this time, the linear velocity of the piston rod 13 is also low, so that the self-varying force hydraulic damper 11 is in the strong wind mode. When the piston rod 3 is compressed, the hydraulic oil rushes away the first valve plate 43, so that the edge area of the first valve plate 43 tilts away from the first end surface 441 and forms a gap with the first end surface 441, and the hydraulic oil flows out through the gap. When the piston rod 3 is stretched, hydraulic oil rushes away the second valve plate 45, so that the edge area of the second valve plate 45 tilts towards the direction away from the second end face 442 and forms a gap with the second end face 442, and the hydraulic oil flows out through the gap. When the self-variable force hydraulic damper 11 is in a strong wind mode, the first valve plate 43 and the second valve plate 45 may be tilted under the impact of hydraulic oil to deform, so as to satisfy the moving amount of the piston assembly 4 and the piston rod 3 in the self-variable force hydraulic damper 11; the first disc spring 42 and the second disc spring 46 are both held at the deformation amount in the pre-compressed state.

When the solar photovoltaic panel 12 is in an environment with ultra-strong wind, the solar photovoltaic panel 12 is under the pressure given by the ultra-strong wind, the piston rod 3 is under the impact load force given by the solar panel fixing frame 13, so that the piston assembly 4 moves in the working cylinder 24, the linear velocity of the piston rod 3 is high, and the self-variable force hydraulic damper 11 is in a strong wind mode. At this time, the first disc spring 42 and the second disc spring 46 are pressed to be completely deformed, and the first valve plate 43 and the second valve plate 45 are pressed in the variable position piston 44, so that the hydraulic oil can only flow through the first and second throttling

grooves

432 and 452, since the damping force provided by the hydraulic damper is proportional to the moving speed of the piston rod thereof, i.e., the faster the piston rod of the hydraulic damper moves, the greater the damping force provided by the hydraulic damper, when the first and second disc springs 42 and 46 are deformed to press the first and

second valve plates

43 and 45 against the variable position piston 44, the self-variable force hydraulic damper 11 provides a large and sudden-rising damping force, so that the solar photovoltaic panel 12 can be locked by the self-variable force hydraulic damper 11 in an environment with ultra-strong wind, and the aim of quickly attenuating severe vibration of the solar photovoltaic panel 12 is fulfilled.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a from variable power hydraulic damper for solar photovoltaic power generation system, includes housing assembly (2), piston rod (3), piston assembly (4), its characterized in that: the piston assembly (4) is arranged on the piston rod (3) and sequentially comprises a first cushion piece (41), a first disc-shaped spring (42), a first valve plate (43), a variable position piston (44), a second valve plate (45), a second disc-shaped spring (46) and a second cushion piece (47); the displaceable piston (44) having a first end face (441) and a second end face (442), and further being provided with a first flow through hole (443) and a second flow through hole (444) passing through the first end face (441) and the second end face (442); the first valve plate (43) is pressed on the first end surface (441) through the action of the first disc-shaped spring (42), and the first valve plate (43) covers the first through hole (443) but does not cover the second through hole (444); the second valve plate (45) is pressed on the second end face (442) through the action of the second disc spring (46), the second valve plate (45) covers the second through hole (444) and does not cover the first through hole (443);

the first conical surface of the first disc-shaped spring (42) faces the first valve plate (43); the second conical surface of the second disc spring (46) faces the second valve plate (45);

the first valve plate (43) is provided with a first throttling groove (432) for the fluid in the first through hole (443) to flow out; the second valve plate (45) is provided with a second throttling groove (452) for allowing the fluid in the second through hole (444) to flow out;

when the solar photovoltaic panel (12) is in an environment with ultra-strong wind, the first disc-shaped spring (42) and the second disc-shaped spring (46) are pressed to be completely deformed, and the first valve plate (43) and the second valve plate (45) are pressed in the variable-position piston (44), so that hydraulic oil can only flow through the first throttling groove (432) and the second throttling groove (452).

2. The self-variable force hydraulic damper for the solar photovoltaic power generation system according to claim 1, wherein: the first valve plate (43) is composed of at least two stacked first single sheets (431), a first throttling notch (4311) is formed in one of the first valve plate (43) and the valve plate attached to the variable position piston (44), and a first throttling groove (432) is formed in the first valve plate (43); the second valve plate (45) is composed of at least two stacked second single sheets (451), a second throttling notch (4511) is formed in the valve plate, attached to the variable position piston (44), in the second valve plate (45), and a second throttling groove (452) is formed in the second valve plate (45).

3. The self-variable force hydraulic damper for the solar photovoltaic power generation system according to claim 1, wherein: the first flow through holes (443) are inclined holes and are arranged obliquely outward in a direction from the first end face (441) to the second end face (442); the second flow through holes (444) are also inclined holes and are arranged obliquely outward in the direction from the second end face (442) to the first end face (441).

4. The self-variable force hydraulic damper for the solar photovoltaic power generation system according to claim 3, wherein: the variable position piston (44) is provided with a first annular groove (445) on the first end surface (441), the first through flow hole (443) is communicated with the inner wall of the first annular groove (445), the first throttling groove (432) is communicated with the first annular groove (445), and the first valve plate (43) covers the first annular groove (445); the variable position piston (44) is in second terminal surface (442) has seted up second annular groove (446), second flow bore (444) communicate in the inner wall of second annular groove (446), second throttle groove (452) with second annular groove (446) are linked together, second valve block (45) will second annular groove (446) lid closes.

5. The self-variable force hydraulic damper for the solar photovoltaic power generation system according to claim 1, wherein: the tail end of piston rod (3) has confession installation section (31) of piston assembly (4) installation, and the top of installation section (31) is formed with ladder face (32), piston rod (3) still be equipped with piston assembly (4) compress tightly mounting nut (34) on ladder face (32).

6. The self-variable force hydraulic damper for the solar photovoltaic power generation system according to claim 1, wherein: the shell assembly (2) comprises an outer cylinder body (21), a bottom cover (23) arranged at the tail end of the outer cylinder body (21), a front cover (22) arranged at the front end of the outer cylinder body (21), a guide sealing assembly (8) which is arranged at the front end of the outer cylinder body (21) and guides a piston rod (3), and a working cylinder (24) which is positioned in the outer cylinder body (21) and matched with the piston assembly (4); a compression valve (5) assembly is installed at the lower end of the working cylinder (24), and an oil storage cavity (91) is formed between the working cylinder (24) and the outer cylinder body (21); the guide sealing assembly (8) is provided with a first through hole (83) for the piston rod (3) to extend out, and a first guide sleeve (84), an oil seal (85) and a second guide sleeve (86) are sequentially arranged on the inner wall of the first through hole (83) along the extending direction of the piston rod (3).

7. The self-variable force hydraulic damper for the solar photovoltaic power generation system according to claim 6, wherein: the direction seal assembly (8) is in first uide bushing (84) with still be equipped with oil return ring groove (815) between oil blanket (85), direction seal assembly (8) still be equipped with intercommunication oil return ring groove (815) with oil gallery (816) of oil storage chamber (91).

8. The self-variable force hydraulic damper for the solar photovoltaic power generation system according to claim 6, wherein: the guide sealing assembly (8) comprises a first guide piece (81) which is hermetically arranged in the inner cavity of the outer cylinder body (21) and a second guide piece (82) which is arranged in the inner cavity of the outer cylinder body (21) and is positioned at the outer end of the first guide piece (81); the first guide piece (81) is provided with a first insertion part (811) inserted in the working cylinder (24), and a first guide groove (812) for installing the first guide sleeve (84) is formed in the end surface of the first insertion part (811); a positioning slot (813) is formed in one end, facing the second guide piece (82), of the first guide piece (81) and provided with the second guide piece (82), and an oil seal ring groove (814) for mounting the oil seal (85) is formed in the bottom surface of the positioning slot (813); the second guide member (82) has a second insertion part (821) inserted into the positioning insertion groove (813), and a second guide groove (822) for mounting the second guide sleeve (86) is formed in an end surface of the second insertion part (821) facing the first guide member (81).