Pressurizing oil cylinder and pressurizing system

Abstract

The utility model belongs to the technical field of oil cylinders, and particularly relates to a pressurizing oil cylinder and a pressurizing system. The rod part of the piston rod penetrates through the low-pressure cylinder body and the high-pressure cylinder body, and one end of the piston rod extends into the high-pressure cylinder body to form a high-pressure cavity; the piston part is positioned in the low-pressure cavity to divide the low-pressure cavity into a low-pressure cavity and a non-pressure cavity; the low-pressure cavity and the non-pressure cavity are sealed through a piston part and the inner wall of the low-pressure cylinder body; and the non-pressure cavity and the high-pressure cavity are sealed through a rod part and the inner wall of the high-pressure cylinder body. The utility model has the advantages of simple structure, few accessories, no need of a hydraulic control one-way valve and an oil path block, and lower use and maintenance cost.

Description

Technical Field

[0001] The utility model belongs to the field of oil cylinders, and particularly relates to a supercharging oil cylinder and a supercharging system. Background Art

[0002] The existing design structure of the supercharging oil cylinder is relatively complex. The cost is relatively high due to the installation of pilot-operated check valves and oil circuit blocks on both sides of the supercharging cylinder. In addition, the pilot-operated check valves are prone to damage, resulting in high maintenance costs. Moreover, the control circuit of the existing supercharging oil cylinder is relatively complex. In addition to the working circuit, an auxiliary circuit needs to be set up, which increases the cost and failure risk of the entire hydraulic system. The pilot-operated check valves in the auxiliary circuit are very easy to damage, leading to high maintenance costs.

[0003] Therefore, in order to meet the requirements of the supercharging oil cylinder for judging the leakage of the internal oil cavity in multiple driving scenarios in multiple ways, a supercharging oil cylinder and a supercharging system are provided.

[0004] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of this application. Therefore, the above description is not considered as information of the prior art. Summary of the Utility Model

[0005] In order to solve the above technical problems, the disclosed embodiments provide a supercharging oil cylinder and a supercharging system.

[0006] In a first aspect, the disclosed embodiments of the present disclosure provide a supercharging oil cylinder, including

[0007] A low-pressure cylinder body and a high-pressure cylinder body nested with each other;

[0008] A piston rod, the rod part of which penetrates through the low-pressure cylinder body and the high-pressure cylinder body, and one end extends into the high-pressure cylinder body to form a high-pressure cavity; and the piston part is located in the low-pressure cavity to divide the low-pressure cavity into a low-pressure cavity and a pressureless cavity; where

[0009] The low-pressure cavity and the pressureless cavity are sealed by the piston part and the inner wall of the low-pressure cylinder body;

[0010] The pressureless cavity and the high-pressure cavity are sealed by the rod part and the inner wall of the high-pressure cylinder body.

[0011] In an optional embodiment, the other end of the rod part extends out from the end cover of the low-pressure cylinder body.

[0012] In an optional embodiment, two oil outlets are provided in the high-pressure cavity.

[0013] In an optional embodiment, the pressureless cavity is communicated with an observation port provided on the cylinder body.

[0014] In an optional embodiment, the force-bearing area of the low-pressure cavity is two to four times that of the high-pressure cavity.

[0015] In a second aspect, the disclosed embodiment also includes a boosting system, including the boosting oil chamber mentioned above; and a hydraulic source, connected to the low-pressure cylinder body, providing fluid to the low-pressure chamber to move the piston rod toward the high-pressure chamber, and forming high-pressure oil in the high-pressure chamber.

[0016] In an optional embodiment, the boosting system further includes a power source connected to the protruding end of the rod from the end cover to drive the piston rod to move toward the high-pressure chamber, so that high-pressure oil is formed in the high-pressure chamber.

[0017] In an optional embodiment, an oil inlet is provided on the low-pressure cylinder body, and the oil inlet is communicated with the low-pressure chamber.

[0018] In an optional embodiment, the power source includes a base, a driver fixedly disposed on the base, and an eccentric disk drivingly connected to an output end of the driver, wherein:

[0019] The eccentric disk is drivingly connected to the protruding end of the piston rod from the end cover.

[0020] In an optional embodiment, the end of the piston rod is provided with U The eccentric disk is provided with a transmission shaft, the transmission shaft is rotatably connected with a connecting rod, and the other end of the connecting rod is rotatably arranged on the U shaped mounting opening; a sliding hole is opened on the end cover, the axial direction of the sliding hole is consistent with the sliding direction of the piston rod, wherein the piston rod is slidably arranged in the sliding hole.

[0021] The beneficial effects of the utility model are:

[0022] The utility model has a simple structure and a small number of accessories. It does not require a hydraulically controlled one-way valve and an oil circuit block, and has low use and maintenance costs. The control circuit matched with the booster oil cylinder of the utility model is simple, and it can be directly connected to the main pump circuit without an auxiliary circuit, and there is no risk of damage to the hydraulically controlled one-way valve. The specific failure situation can be judged by observing the exposed distance and movement trend of the piston rod without disassembling the booster cylinder itself. It can be a dual-power source, that is, a hybrid power drive booster, or a single hydraulic drive or directly connected to other power sources to drive the booster. Clean energy can be used instead of the hydraulic system to reduce the risk of oil leakage and pollution.

[0023] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by implementing the present invention.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. Brief Description of the Drawings

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of a booster cylinder according to a preferred embodiment of the present invention;

[0027] Figure 2 It is another schematic structural diagram of a booster cylinder according to a preferred embodiment of the present invention;

[0028] Figure 3 It is a schematic overall structural diagram of a booster system and a booster cylinder according to a preferred embodiment of the present invention;

[0029] Figure 4 It is a schematic internal structural diagram of a booster system according to a preferred embodiment of the present invention.

[0030] In the figures:

[0031] 100, cylinder block; 110, high-pressure chamber; 111, oil outlet; 120, low-pressure chamber; 121, oil inlet; 130, non-pressure chamber; 131, observation port; 140, piston rod; 150, sliding hole; 160, low-pressure cylinder block; 170, high-pressure cylinder block; 180, end cover;

[0032] 200, power source; 210, base; 220, driver; 230, eccentric disc; 231, transmission shaft; 240, connecting rod; 250, U U-shaped mounting port. Detailed Embodiments

[0033] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0034] It has been found through research that in the related art, the design structure of the existing booster cylinder is relatively complex. The cost is relatively high due to the installation of pilot-operated check valves and oil circuit blocks on both sides of the booster cylinder, and the pilot-operated check valves are prone to damage, resulting in relatively high maintenance costs. Moreover, the control circuit of the existing booster cylinder is relatively complex. In addition to the working circuit, an auxiliary circuit needs to be set up, which increases the cost and failure risk of the entire hydraulic system. The pilot-operated check valves in the auxiliary circuit are very easy to damage, and the maintenance cost is very high.

[0035] The following will, with reference to the accompanying drawings, elaborate on some embodiments of the present invention. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, in the drawings, for the purpose of effectively describing the technical content, the thickness of the components may be exaggerated or reduced.

[0037] Based on the above research, in order to solve the above technical problems, as Figure 1 shown, this embodiment provides a booster cylinder, which includes a low-pressure cylinder body 160 and a high-pressure cylinder body 170 nested therein; a piston rod 140, the rod portion of which penetrates through the low-pressure cylinder body 160 and the high-pressure cylinder body 170, and one end extends into the high-pressure cylinder body 170 to form a high-pressure chamber 110; and a piston portion located in the low-pressure cylinder body 160 and dividing the low-pressure cylinder body 160 into a low-pressure chamber 120 and a pressureless chamber 130; wherein the low-pressure chamber 120 and the pressureless chamber 130 are sealed between the piston portion and the inner wall of the low-pressure cylinder body 160; and the pressureless chamber 130 and the high-pressure chamber 110 are sealed between the rod portion and the inner wall of the high-pressure cylinder body 170. In some embodiments, the piston rod 140 can be pushed by an external force to move the piston rod 140.

[0038] Referring to Figure 1 , two oil outlets 111 are provided on the cylinder block 100 and communicate with the high-pressure chamber 110. When the piston rod 140 is pushed towards the high-pressure chamber 110, the piston rod 140 will compress the oil inside the high-pressure chamber 110 to form high-pressure oil, and the high-pressure oil will be delivered to the component to be tested through the oil outlet 111. When the low-pressure chamber 120 returns oil, the oil in the high-pressure chamber 110 will push the piston rod 140 back to the starting position, thus forming a boosting cycle.

[0039] Continuing to refer to Figure 1, Exemplarily, the non-pressure chamber 130 is located between the high-pressure chamber 110 and the low-pressure chamber 120. And the other end of the rod portion extends out from the end cap 180 of the low-pressure cylinder block 160. The non-pressure chamber 130 communicates with the observation port 131 provided on the cylinder block. And the piston rod 140 extends out of the cylinder block. Wherein, when the seal between the piston rod 140 and the low-pressure cylinder block 160 fails, the low-pressure chamber 120 communicates with the non-pressure chamber 130, and the hydraulic oil in the low-pressure chamber 120 will flow out through the observation port 131, so that the piston seal failure can be judged; when the seal between the piston rod 140 and the high-pressure cylinder block 170 fails, the non-pressure chamber 130 communicates with the high-pressure chamber 110, and the hydraulic oil in the high-pressure chamber 110 will flow into the non-pressure chamber 130. Since the hydraulic oil in the high-pressure chamber 110 decreases, the length of the piston rod 140 extending out of the low-pressure cylinder block 160 will continuously decrease and cannot return to the length before pressurization, whereby the seal failure can be determined.

[0040] The force-bearing area of the low-pressure chamber 120 is two to four times that of the high-pressure chamber 110. Here, the force-bearing area refers to the axial contact area between the hydraulic cylinder and the piston rod. For details, see Figure 1 , in which, the force-bearing area of the low-pressure chamber 120 is the radial contact area between the piston rod 140 and the low-pressure chamber 120, and the force-bearing area of the high-pressure chamber 110 is the radial contact area between the piston rod 140 and the high-pressure chamber 110.

[0041] In some embodiments, the force-bearing area of the low-pressure chamber 120 is four times that of the high-pressure chamber 110. Specifically, according to Pascal's law (Pascal's law: The pressure applied to a closed liquid is transmitted equally in all directions without any reduction, and the forces acting on each part are equal): P = F / A , F = P × A , we get

[0042] P 1 × A 1 = P 2 × A 2, that is .

[0043] Note:

[0044] P 1: The pressure at the oil inlet 121;

[0045] P 2: The pressurized pressure in the high-pressure chamber 110;

[0046] A 1: The effective force-bearing area of the low-pressure chamber 120;

[0047] A 2: The effective force-bearing area of the high-pressure chamber 110;

[0048] It can be concluded that: A 1=4× A 2, therefore, it can be concluded that the force-bearing area of the low-pressure chamber 120 is four times that of the high-pressure chamber 110.

[0049] See also Figure 2 This embodiment also provides at least a boosting system for a boosting cylinder, which includes the above-mentioned boosting cylinder and a hydraulic source. The hydraulic source is connected to the low-pressure cylinder body 160 and provides fluid to the low-pressure chamber 120 to move the piston rod 140 toward the high-pressure chamber 110, so that high-pressure oil is formed in the high-pressure chamber 110.

[0050] For details, see Figure 2 The low-pressure cylinder 160 is provided with an oil inlet 121, which is connected to the low-pressure chamber 120. For example, in order to achieve the movement of the piston rod 140, fluid can flow in from the oil inlet 121 to drive the piston rod 140 to move. Figure 2 In the direction indicated by the arrow.

[0051] In some embodiments, see Figure 3 and Figure 4 The boosting system also includes a power source connected to the protruding end of the rod from the end cover 180 to drive the piston rod 140 to move toward the high-pressure chamber 110 so that high-pressure oil is formed in the high-pressure chamber 110.

[0052] For example, refer to Figure 3 and Figure 4 The power source 200 includes a base 210, a driver 220 fixedly disposed on the base 210, and an eccentric disk 230 drivingly connected to the output end of the driver 220, wherein the eccentric disk 230 is drivingly connected to the piston rod 140. The end of the piston rod 140 is provided with U The eccentric disk 230 is provided with a transmission shaft 231, which is rotatably connected to one end of the connecting rod 240, and the other end of the connecting rod 240 is rotatably arranged on the U shaped mounting opening 250. Exemplarily, the driver 200 is a servo motor, which amplifies the output torque through a reducer, and the reducer drives the eccentric disk 230 to rotate through the output shaft of the reducer, and the eccentric disk 230 drives the connecting rod 240 to swing, and the swinging connecting rod 240 drives the piston rod 140 to perform telescopic movement.

[0053] In order to make the telescopic movement of the piston rod 140 more stable, in some embodiments, a sliding hole 150 is provided on the end cover 180, and the axial direction of the sliding hole 150 is consistent with the sliding direction of the piston rod 140, wherein the piston rod 140 is slidably arranged in the sliding hole 150. The eccentric disk 230 rotates one circle to form a cycle of pressurization and depressurization, or the eccentric disk 230 rotates a certain angle to pressurize and then turns back to the initial angle to form a cycle of pressurization and depressurization. The driving mode of the piston rod 140 can also be driven by the above-mentioned servo motor or driven by the servo motor and the hydraulic source at the same time.

[0054] In summary, in order to realize the movement of the piston rod 140, the following methods are specifically disclosed:

[0055] 1. See Figure 1 , the piston rod 140 can be pushed to move by external force, so that high-pressure oil is formed in the high-pressure chamber 110. Specifically, it can be: a base 210, a driver 220 fixedly arranged on the base 210, and an eccentric disk 230 connected to the output end of the driver 220, wherein the eccentric disk 230 is connected to the piston rod 140. A U-shaped mounting opening 250 is provided at the end of the piston rod 140, and a transmission shaft 231 is provided on the eccentric disk 230. The transmission shaft 231 is rotatably connected to one end of the connecting rod 240, and the other end of the connecting rod 240 is rotatably arranged in the U-shaped mounting opening 250. Exemplarily, the driver 200 is a servo motor, and the servo motor amplifies the output torque through a reducer. The reducer drives the eccentric disk 230 to rotate through the output shaft of the reducer, and the eccentric disk 230 drives the connecting rod 240 to swing, and the swinging connecting rod 240 drives the piston rod 140 to do telescopic movement.

[0056] 2. See Figure 2 The hydraulic source is connected to the low-pressure cylinder 160 to provide fluid to the low-pressure chamber 120 so that the piston rod 140 moves toward the high-pressure chamber 110, so that high-pressure oil is formed in the high-pressure chamber 110.

[0057] 3. Participate Figure 3 and Figure 4 The piston rod 140 can be connected to the low-pressure cylinder 160 through a hydraulic source to provide fluid to the low-pressure chamber 120. At the same time, the piston rod 140 is transmission-connected to the driver 200. The power source of the piston rod 140 is a hybrid power source that jointly drives the piston rod 140 to move, so that high-pressure oil is formed in the high-pressure chamber 110.

[0058] In summary, for the boosting oil cylinder and boosting system mentioned in this embodiment, the structure of the present application is simple, with a small number of accessories. It does not require a hydraulic check valve and an oil circuit block, resulting in lower usage and maintenance costs. Moreover, the control circuit matched with the boosting oil cylinder of the present utility model is simple, and it can be directly connected to the main pump circuit without an auxiliary circuit, eliminating the risk of damage to the hydraulic check valve. Without disassembling the boosting cylinder itself, the specific failure condition can be judged by observing the exposed distance and movement trend of the piston rod. It can be driven by a dual power source, i.e., hybrid drive boosting, or by a single hydraulic drive or directly connected to other external power sources for boosting. Clean energy can be used to replace the hydraulic system, reducing risks such as oil leakage and pollution.

[0059] As used herein, phrases such as "in one embodiment", "according to one embodiment", "in some embodiments", etc. generally refer to the fact that the specific feature, structure, or characteristic after such phrase can be included in at least one embodiment of the present disclosure. Therefore, a specific feature, structure, or characteristic can be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, terms such as "example", "exemplary", etc. are used "as an example, instance, or illustration. Any embodiment, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other embodiments, aspects, or designs. Instead, the use of terms such as "example", "exemplary", etc. is intended to present concepts in a specific manner.

[0060] In the above discussion, unless otherwise specified, when used to describe a numerical value, terms such as "is", "is large", "substantially", etc. indicate a change of + / −10% of the value.

[0061] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It 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 thus cannot be construed as a limitation of the present utility model. In addition, terms such as "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0062] Based on the above inspiration from the ideal embodiment of the present utility model, through the above description, relevant staff can, without departing from the technical idea of this utility model, make various changes and modifications. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A boosting oil cylinder, characterized in that, include: A low-pressure cylinder (160) and a high-pressure cylinder (170) arranged in a nested manner; A piston rod (140), the rod portion of which passes through the low-pressure cylinder body (160) and the high-pressure cylinder body (170), and one end of which extends into the high-pressure cylinder body (170) to form a high-pressure chamber (110); and a piston portion located in the low-pressure chamber (120) to divide the low-pressure chamber (120) into a low-pressure chamber (120) and a pressure-free chamber (130); wherein The low-pressure chamber (120) and the pressure-free chamber (130) are sealed via the piston portion and the inner wall of the low-pressure cylinder body (160); The pressure-free chamber (130) and the high-pressure chamber (110) are sealed via the rod portion and the inner wall of the high-pressure cylinder body (170).

2. The booster cylinder according to claim 1, characterized in that: The other end of the rod portion extends out from an end cover (180) of the low-pressure cylinder body (160).

3. The booster cylinder according to claim 1, characterized in that: Two oil outlets (111) are arranged in the high-pressure chamber (110).

4. The booster cylinder according to claim 1, characterized in that: The pressure-free chamber (130) is in communication with an observation port (131) provided on the cylinder body.

5. The booster cylinder according to claim 1, characterized in that: The force-bearing area of the low-pressure chamber (120) is two to four times that of the high-pressure chamber (110).

6. A supercharging system, characterized in that, include: The booster cylinder according to claim 1; and A hydraulic source is connected to the low-pressure cylinder (160) and provides fluid to the low-pressure chamber (120) so that the piston rod (140) moves toward the high-pressure chamber (110), and high-pressure oil is formed in the high-pressure chamber (110).

7. The boosting system according to claim 6, characterized in that: The low-pressure cylinder body (160) is provided with an oil inlet (121), and the oil inlet (121) is communicated with the low-pressure chamber (120).

8. The pressure boosting system according to claim 7, characterized in that: The boosting system further comprises a power source (200) connected to the end of the rod extending from the end cover (180) to drive the piston rod (140) to move toward the high-pressure chamber (110), so that high-pressure oil is formed in the high-pressure chamber (110).

9. The boosting system according to claim 8, characterized in that: The power source (200) comprises a base (210), a driver (220) fixedly disposed on the base (210), and an eccentric disk (230) drivingly connected to an output end of the driver (220), wherein: The eccentric disk (230) is in transmission connection with the protruding end of the piston rod (140) from the end cover (180).

10. The boosting system according to claim 9, characterized in that: The end of the piston rod (140) is provided with U a shaped mounting port (250). A transmission shaft (231) is provided on the eccentric disc (230). The transmission shaft (231) is rotatably connected to the connecting rod (240). The other end of the connecting rod (240) is rotatably arranged in the U shaped mounting port (250); The end cover (180) is provided with a sliding hole (150), and the axial direction of the sliding hole (150) is consistent with the sliding direction of the piston rod (140), wherein: The piston rod (140) is slidably disposed in the sliding hole (150).

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