Hydraulic cylinder with balanced stress and photovoltaic tracking system

Abstract

The utility model discloses a hydraulic cylinder with balanced stress and a photovoltaic tracking system, and relates to the technical field of photovoltaic power generation. Part of the piston assembly is movably located in the cylinder barrel, and a first guide hole and a negative pressure hole which are communicated with each other are formed in the piston assembly; the guide rods and the guide columns are located in the cylinder barrel; wherein the multiple guide rods are all movably matched with the piston assembly, the guide columns extend into the first guide holes, and the guide columns are movably matched with the piston assembly. The hydraulic cylinder has the technical effect that the piston assembly of the hydraulic cylinder and the cylinder barrel of the hydraulic cylinder can be conveniently prevented from being abraded with each other.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation, and particularly relates to a hydraulic cylinder with balanced force and a photovoltaic tracking system. Background Art

[0002] A photovoltaic tracking system is a photovoltaic support system used for automatically tracking the sun and increasing the overall power generation amount, and is widely used in the field of photovoltaic power generation.

[0003] When a photovoltaic tracking system is driven by a hydraulic cylinder, the hydraulic cylinder is generally installed obliquely, which easily causes the force on the piston assembly of the hydraulic cylinder to be unbalanced, thereby causing mutual wear between the piston assembly of the hydraulic cylinder and the cylinder barrel of the hydraulic cylinder, and further causing seal failure. Summary of the Utility Model

[0004] In view of the above technical problems, the utility model provides a hydraulic cylinder with balanced force and a photovoltaic tracking system, which are convenient for preventing mutual wear between the piston assembly of the hydraulic cylinder and the cylinder barrel of the hydraulic cylinder.

[0005] In order to solve the above problems, the technical solution provided by the utility model is as follows:

[0006] A hydraulic cylinder with balanced force includes:

[0007] A cylinder barrel;

[0008] A piston assembly partially movably located in the cylinder barrel, and a first guide hole and a negative pressure hole communicating with each other are arranged in the piston assembly;

[0009] A plurality of guide rods and guide columns both located in the cylinder barrel;

[0010] Wherein, the plurality of guide rods are all movably matched with the piston assembly, the guide column extends into the first guide hole, and the guide column is movably matched with the piston assembly.

[0011] Optionally, the piston assembly includes:

[0012] A piston body and a piston rod connected to each other;

[0013] A first guide hole body arranged in the piston body;

[0014] A second guide hole body arranged in the piston rod;

[0015] Wherein, the first guide hole body and the second guide hole body together communicate to form the first guide hole, the negative pressure hole is arranged in the piston rod, the negative pressure hole communicates with the second guide hole body, the plurality of guide rods are all movably matched with the piston body, and the guide column can be movably matched with both the piston body and the piston rod.

[0016] Optionally, the piston assembly further includes a first sealing ring disposed within the guiding hole body, the first sealing ring being located between the guiding column and the piston body, and the first sealing ring being in movable cooperation with the guiding column.

[0017] Optionally, the piston assembly further includes a plurality of second guiding holes provided on the piston body, the guiding rod passing through the corresponding second guiding holes and being in movable cooperation with the piston body.

[0018] Optionally, the piston assembly further includes a second sealing ring correspondingly disposed within the second guiding holes, the second sealing ring being located between the guiding rod and the piston body, and the second sealing ring being in corresponding movable cooperation with the guiding rod.

[0019] Optionally, the piston assembly further includes an anti-wear ring and at least one third sealing ring both disposed outside the piston body, the anti-wear ring and the at least one third sealing ring both being in movable cooperation with the inner wall of the cylinder barrel.

[0020] Optionally, the piston assembly further includes a first lifting lug connected to one end of the piston rod away from the piston body.

[0021] Optionally, it further includes a second lifting lug connected to the cylinder barrel.

[0022] Optionally, the plurality of guiding rods are evenly distributed along the circumferential direction of the cylinder barrel.

[0023] A photovoltaic tracking system includes a hydraulic cylinder with balanced force.

[0024] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects: The plurality of guiding rods are used for movable cooperation with the piston assembly, thereby exerting an axial guiding effect on the piston assembly, preventing the piston assembly from moving radially, increasing the force balance, and further preventing the piston assembly and the cylinder barrel from wearing each other, so as to prevent seal failure; The guiding column is used for movable cooperation with the first guiding hole, thereby further exerting an axial guiding effect on the piston assembly, further preventing the piston assembly from moving radially, further increasing the force balance, and further preventing the piston assembly and the cylinder barrel from wearing each other, so as to further prevent seal failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a hydraulic cylinder with balanced force proposed by an embodiment of the present utility model;

[0026] Figure 2 is a schematic structural diagram of the cylinder barrel proposed by an embodiment of the present utility model;

[0027] Figure 3 is a schematic structural diagram of the cylinder barrel proposed by an embodiment of the present utility model;

[0028] Figure 4 One of the structural schematic diagrams of the piston assembly proposed by the embodiment of the present utility model;

[0029] Figure 5 Another structural schematic diagram of the piston assembly proposed by the embodiment of the present utility model;

[0030] In the figure: 1, cylinder barrel; 11, oil inlet hole; 12, oil return hole; 2, piston assembly; 21, piston body; 211, first guiding hole body; 212, second guiding hole; 22, piston rod; 221, second guiding hole body; 222, negative pressure hole; 23, first sealing ring; 24, second sealing ring; 25, third sealing ring; 26, anti-wear ring; 27, first lifting lug; 3, guiding rod; 4, guiding column; 5, second lifting lug. Detailed implementation manners

[0031] To further understand the content of the present utility model, the present utility model will be described in detail in combination with the accompanying drawings and embodiments.

[0032] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than limiting the utility model. In addition, it should be noted that for the convenience of description, only the parts related to the utility model are shown in the drawings. The terms "first", "second", etc. used in the present utility model are set for the convenience of describing the technical solution of the present utility model, and have no specific limiting effect, and are all general references, and do not constitute a limiting effect on the technical solution of the present utility model. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradiction or conflict, and are all within the scope of protection required by the present utility model.

[0033] Embodiment 1

[0034] Combined with the attached Figures 1-5 , this embodiment provides a hydraulic cylinder with balanced force, including:

[0035] Cylinder barrel 1;

[0036] A piston assembly 2 that is partially movable inside the cylinder barrel 1, and a first guide hole and a negative pressure hole 222 that communicate with each other are provided inside the piston assembly 2;

[0037] A plurality of guide rods 3 and guide columns 4 that are both located inside the cylinder barrel 1;

[0038] Among them, a plurality of guide rods 3 are all movably matched with the piston assembly 2, the guide column 4 extends into the first guide hole, and the guide column 4 is movably matched with the piston assembly 2.

[0039] Specifically, the cylinder barrel 1 is used to carry the piston assembly 2; the piston assembly 2 and the cylinder barrel 1 are jointly used to enable the telescopic movement of the hydraulic cylinder with balanced force in the present application; several guide rods 3 are used to movably cooperate with the piston assembly 2, so as to exert an axial guiding effect on the piston assembly 2, prevent the piston assembly 2 from moving radially, increase the force balance, and further prevent the piston assembly 2 and the cylinder barrel 1 from wearing each other, so as to prevent seal failure. Among them, the number of guide rods 3 is not limited and can be two, three, etc., preferably two; the guide post 4 is used to movably cooperate with the first guide hole, so as to further exert an axial guiding effect on the piston assembly 2, further prevent the piston assembly 2 from moving radially, further increase the force balance, and further prevent the piston assembly 2 and the cylinder barrel 1 from wearing each other, so as to further prevent seal failure; the negative pressure hole 222 is used for the liquid medium to flow through, prevent the formation of negative pressure in the first guide hole, and further prevent the piston assembly 2 from being unable to move; the cylinder barrel 1 is provided with an oil inlet hole 11 and an oil return hole 12 to facilitate the liquid medium to flow through the cylinder barrel 1.

[0040] Further, as Figure 4 , the piston assembly 2 includes:

[0041] The piston body 21 and the piston rod 22 which are connected to each other;

[0042] The first guide hole body 211 provided in the piston body 21;

[0043] The second guide hole body 221 provided in the piston rod 22;

[0044] Among them, the first guide hole body 211 and the second guide hole body 221 are jointly connected to form a first guide hole, the negative pressure hole 222 is provided in the piston rod 22, the negative pressure hole 222 is connected to the second guide hole body 221, several guide rods 3 are all movably cooperated with the piston body 21, and the guide post 4 can be movably cooperated with both the piston body 21 and the piston rod 22.

[0045] Specifically, assuming that the cross-sectional area of the piston body 21 is B, the cross-sectional area of the piston rod 22 is C, and the cross-sectional areas of the first guide hole body 211 and the second guide hole body 221 are both A, so that the effective cross-sectional area at one end of the piston body 21 in the present application is B - A, and the effective cross-sectional area at the other end of the piston body 21 in the present application is B - C, which is convenient for making the effective cross-sectional areas at both ends of the piston body 21 in the present application approximately equal (the effective cross-sectional area at one end of the conventional piston body 21 is B, and the effective cross-sectional area at the other end of the conventional piston body 21 is B - C, resulting in a large difference in the effective cross-sectional areas at both ends of the conventional piston body 21), so that the hydraulic pressures at both ends of the piston body 21 in the present application are approximately equal, and further the movement balance of the piston body 21 in the present application is good.

[0046] Further, as Figure 4, the piston assembly 2 further includes a first sealing ring 23 disposed in the guide hole body 211. The first sealing ring 23 is located between the guide post 4 and the piston body 21, and the first sealing ring 23 is movably engaged with the guide post 4.

[0047] Specifically, the first sealing ring 23 is used to enhance the sealing performance between the piston body 21 and the guide post 4. The material of the first sealing ring 23 can be silicone rubber, fluororubber, etc.

[0048] Furthermore, as Figure 4 , the piston assembly 2 further includes a plurality of second guide holes 212 provided on the piston body 21. The guide rod 3 passes through the corresponding second guide holes 212 and is movably engaged with the piston body 21.

[0049] Specifically, the plurality of second guide holes 212 are used to correspondingly accommodate the plurality of guide rods 3.

[0050] Furthermore, as Figure 4 , the piston assembly 2 further includes a second sealing ring 24 correspondingly disposed in the second guide holes 212. The second sealing ring 24 is located between the guide rod 3 and the piston body 21, and the second sealing ring 24 is correspondingly movably engaged with the guide rod 3.

[0051] Specifically, the second sealing ring 24 is used to enhance the sealing performance between the piston body 21 and the guide rod 3. The material of the second sealing ring 24 can be silicone rubber, fluororubber, etc.

[0052] Furthermore, as Figure 4 , the piston assembly 2 further includes an anti-wear ring 26 and at least one third sealing ring 25 both disposed outside the piston body 21. The anti-wear ring 26 and the at least one third sealing ring 25 are both movably engaged with the inner wall of the cylinder barrel 1.

[0053] Specifically, the anti-wear ring 26 is used to prevent the piston body 21 from directly contacting the inner wall of the cylinder barrel 1; the at least one third sealing ring 25 is used to enhance the sealing between the piston body 21 and the inner wall of the cylinder barrel 1. The material of the third sealing ring 25 can be silicone rubber, fluororubber, etc.

[0054] Furthermore, as Figure 4 , the piston assembly 2 further includes a first lifting lug 27 connected to one end of the piston rod 22 away from the piston body 21.

[0055] Specifically, the first lifting lug 27 facilitates the installation of the piston assembly 2.

[0056] Furthermore, as Figure 1 , it further includes a second lifting lug 5 connected to the cylinder barrel 1.

[0057] Specifically, the second lifting lug 5 facilitates the installation of the cylinder barrel 1.

[0058] Further, as Figure 1 , a plurality of guide rods 3 are circumferentially and uniformly distributed along the cylinder barrel 1.

[0059] Specifically, circumferential uniform distribution is convenient for increasing the guiding uniformity of the plurality of guide rods 3.

[0060] This embodiment also provides a photovoltaic tracking system, including a hydraulic cylinder with balanced force in this embodiment.

[0061] The above has schematically described the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments to this technical solution without creative efforts without departing from the creative purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A force-balanced hydraulic cylinder, characterized in that: include: Cylinder barrel; A piston assembly partially movable in the cylinder, wherein a first guide hole and a negative pressure hole communicating with each other are provided in the piston assembly; A plurality of guide rods and guide posts, all located in the cylinder; Wherein, the plurality of guide rods are all movably matched with the piston assembly, the guide column extends into the first guide hole, and the guide column is movably matched with the piston assembly.

2. A force-balanced hydraulic cylinder according to claim 1, characterized in that: The piston assembly comprises: A piston body and a piston rod connected to each other; A guide hole body 1 provided in the piston body; A second guide hole body provided in the piston rod; Among them, the guide hole body one and the guide hole body two are connected together to form the first guide hole, the negative pressure hole is arranged in the piston rod, the negative pressure hole and the guide hole body two are connected, the several guide rods are all movably cooperated with the piston body, and the guide column, the piston body and the piston rod are all able to movably cooperate.

3. A force-balanced hydraulic cylinder according to claim 2, characterized in that: The piston assembly also includes a first sealing ring arranged in the guide hole body 1, the first sealing ring is located between the guide column and the piston body, and the first sealing ring and the guide column are movably matched.

4. A force-balanced hydraulic cylinder according to claim 2, characterized in that: The piston assembly also includes a plurality of second guide holes arranged on the piston body, and the guide rod passes through the corresponding second guide holes and is movably matched with the piston body.

5. A force-balanced hydraulic cylinder according to claim 4, characterized in that: The piston assembly also includes a second sealing ring correspondingly arranged in the second guide hole, the second sealing ring is located between the guide rod and the piston body, and the second sealing ring and the guide rod are correspondingly movably matched.

6. A force-balanced hydraulic cylinder according to claim 2, characterized in that: The piston assembly further comprises an anti-wear ring and at least one third sealing ring both arranged outside the piston body, and the anti-wear ring and the at least one third sealing ring both movably cooperate with the inner wall of the cylinder.

7. A force-balanced hydraulic cylinder according to claim 2, characterized in that: The piston assembly also includes a first lifting ear connected to an end of the piston rod away from the piston body.

8. A force-balanced hydraulic cylinder according to any one of claims 1 to 7, characterized in that: Also included is a second lifting lug connected to the cylinder barrel.

9. A force-balanced hydraulic cylinder according to any one of claims 1 to 7, characterized in that: The plurality of guide rods are evenly distributed along the circumference of the cylinder.

10. A photovoltaic tracking system, characterized in that: It comprises a force-balanced hydraulic cylinder as described in any one of claims 1-9.

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