Double-oil-cylinder synchronous control hydraulic system
By combining displacement sensors and electromagnetic directional valves, synchronous control of dual hydraulic cylinders is achieved, solving the problem of asynchronous cylinder movement in traditional hydraulic systems and improving the synchronization accuracy and reliability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-04-14
AI Technical Summary
Traditional hydraulic systems struggle to achieve high-precision synchronous operation of dual cylinders, leading to asynchronous cylinder movements that affect equipment performance and accuracy, and may even cause equipment damage or a decline in product quality.
Displacement sensors are used to monitor the displacement of the hydraulic cylinders, and the hydraulic oil delivery is adjusted by electromagnetic directional valves and control devices to achieve synchronous movement of the hydraulic cylinders.
It achieves high-precision synchronous control of dual hydraulic cylinders, improving the overall performance and working accuracy of the equipment, and avoiding equipment damage and product quality degradation.
Smart Images
Figure CN224120452U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic system technology, and in particular to a dual-cylinder synchronous control hydraulic system. Background Technology
[0002] In many industrial applications, such as lifting devices in large machinery and positioning mechanisms in precision machining equipment, dual hydraulic cylinders are often required to achieve smooth and synchronized movement. However, due to factors such as manufacturing differences in the cylinders themselves, the compressibility of hydraulic oil, inconsistent pipeline resistance, and variations in external loads, achieving high-precision synchronous operation of dual hydraulic cylinders has always been a technical challenge. Traditional hydraulic systems often struggle to meet the demands of high synchronization accuracy in certain operating conditions, easily leading to asynchronous cylinder movements. This can affect the overall performance and working accuracy of the equipment, and may even result in equipment damage or a decline in product quality. Utility Model Content
[0003] This utility model provides a dual-cylinder synchronous control hydraulic system to solve the technical problem that traditional hydraulic systems often cannot meet the requirements of some working conditions with high synchronization accuracy, and are prone to the situation that the cylinders move asynchronously, thereby affecting the overall performance and working accuracy of the equipment, and may even lead to equipment damage or product quality degradation.
[0004] To solve the above-mentioned technical problems, the following technical solution is proposed:
[0005] This application provides a dual-cylinder synchronous control hydraulic system, including:
[0006] The oil tank is used to supply hydraulic oil;
[0007] A first hydraulic cylinder and a second hydraulic cylinder, both of which are connected to the oil tank, wherein the oil tank supplies hydraulic oil to the first hydraulic cylinder and the second hydraulic cylinder to drive the telescopic rods inside the first hydraulic cylinder and the second hydraulic cylinder to move.
[0008] An electromagnetic reversing valve is provided between the oil tank and both the first and second oil cylinders. The electromagnetic reversing valve is used to adjust the amount of hydraulic oil delivered from the oil tank to the first or second oil cylinder.
[0009] A displacement sensor is used to detect the displacement of the telescopic rods in the first and second hydraulic cylinders;
[0010] The control device includes an electromagnetic reversing valve and a displacement sensor, both of which are electrically connected to the control sensor. The control device controls the electromagnetic reversing valve based on the displacement detected by the displacement sensor.
[0011] Furthermore, in this embodiment, the electromagnetic directional valve is an electromagnetic proportional directional valve.
[0012] Furthermore, in this embodiment, a first hydraulic pump is also included, through which the oil tank delivers hydraulic oil to the first cylinder or the second cylinder.
[0013] Furthermore, in this embodiment, a liquid level sensor is also included, which is disposed inside the oil tank and used to detect the liquid level of the hydraulic oil in the oil tank.
[0014] Furthermore, in this embodiment, a normally closed valve and a second directional valve are also included;
[0015] Both the first and second oil cylinders are provided with a first oil circuit and a second oil circuit between themselves and the oil tank. The electromagnetic reversing valve is located in the first oil circuit, and the normally closed valve and the second reversing valve are both located in the second oil circuit.
[0016] Furthermore, in this embodiment, the second directional valve is a manual directional valve.
[0017] Furthermore, in this embodiment, the second oil circuit also includes a second hydraulic pump, which is used to transport the hydraulic oil in the oil tank to the first oil cylinder and the second oil cylinder through the second oil circuit.
[0018] Furthermore, in this embodiment, the second hydraulic pump is a manual hydraulic pump.
[0019] Furthermore, in this embodiment, the normally closed valve is a ball valve.
[0020] Furthermore, in this embodiment, a temperature sensor is also included, which is used to detect the temperature of the hydraulic oil in the oil tank.
[0021] Beneficial Effects: This application provides a dual-cylinder synchronous control hydraulic system, including: an oil tank, a first oil cylinder, a second oil cylinder, an electromagnetic directional valve, a displacement sensor, and a control device. The oil tank supplies hydraulic oil; both the first and second oil cylinders are connected to the oil tank, which drives the telescopic rods within them by supplying hydraulic oil. An electromagnetic directional valve is installed between the oil tank and both the first and second oil cylinders, regulating the amount of hydraulic oil supplied from the oil tank to either cylinder. The displacement sensor detects the displacement of the telescopic rods within the first and second oil cylinders. Both the electromagnetic directional valve and the displacement sensor are electrically connected to a control sensor. The control device controls the electromagnetic directional valve based on the displacement detected by the displacement sensor. During operation, the displacement sensor monitors the displacement of the telescopic rods in the first and second oil cylinders in real time and transmits the detected displacement to the control device. The control device adjusts the opening and closing degree of the electromagnetic directional valve by comparing the displacement of the telescopic rods in the first and second oil cylinders, thereby achieving the technical effect of synchronous cylinder movement. Attached Figure Description
[0022] Figure 1 A framework diagram of a dual-cylinder synchronous control hydraulic system provided for an embodiment of this utility model;
[0023] Figure 2 A remote view of a dual-cylinder synchronous control hydraulic system provided for an embodiment of this utility model.
[0024] Explanation of reference numerals in the attached figures
[0025] 1. Oil tank; 2. First oil cylinder; 3. Second oil cylinder; 4. Solenoid directional valve;
[0026] 5. Displacement sensor; 6. Control device; 7. First hydraulic pump; 8. Liquid level sensor;
[0027] 9. Normally closed valve; 10. Second directional valve; 11. First oil circuit; 12. Second oil circuit;
[0028] 13. Second hydraulic pump; 14. Temperature sensor. Detailed Implementation
[0029] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0031] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.
[0032] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0033] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0034] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).
[0035] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0036] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0037] In many industrial applications, such as lifting devices in large machinery and positioning mechanisms in precision machining equipment, dual hydraulic cylinders are often required to achieve smooth and synchronized movement. However, due to factors such as manufacturing differences in the cylinders themselves, the compressibility of hydraulic oil, inconsistent pipeline resistance, and variations in external loads, achieving high-precision synchronous operation of dual hydraulic cylinders has always been a technical challenge. Traditional hydraulic systems often struggle to meet the demands of high synchronization accuracy in certain operating conditions, easily leading to asynchronous cylinder movements. This can affect the overall performance and working accuracy of the equipment, and may even result in equipment damage or a decline in product quality.
[0038] To address the technical problem that traditional hydraulic systems often struggle to meet the demands of high synchronization accuracy in certain operating conditions, leading to asynchronous cylinder movements that negatively impact overall equipment performance and working precision, and may even result in equipment damage or reduced product quality, this application provides a dual-cylinder synchronous control hydraulic system. This system uses a displacement sensor 5 to monitor the displacement of the telescopic rods within the first cylinder 2 and the second cylinder 3, thereby controlling the amount of fluid supplied from the oil tank 1 to the first and second cylinders 2 and 3, ultimately achieving synchronized cylinder movement.
[0039] like Figure 1 As shown, Figure 1A framework diagram of a dual-cylinder synchronous control hydraulic system provided in this application embodiment includes: an oil tank 1, a first cylinder 2, a second cylinder 3, an electromagnetic directional valve 4, a displacement sensor 5, and a control device 6. The oil tank 1 supplies hydraulic oil; both the first cylinder 2 and the second cylinder 3 are connected to the oil tank 1. The oil tank 1 drives the telescopic rods within the first cylinder 2 and the second cylinder 3 to move by supplying hydraulic oil to them; an electromagnetic directional valve 4 is provided between the oil tank 1 and both the first cylinder 2 and the second cylinder 3, and the electromagnetic directional valve 4 is used to regulate the hydraulic oil supply from the oil tank 1 to either the first cylinder 2 or the second cylinder 3. The hydraulic oil delivery volume is controlled by the displacement sensor 5, which detects the displacement of the telescopic rods in the first cylinder 2 and the second cylinder 3. Both the solenoid directional valve 4 and the displacement sensor 5 are electrically connected to the control sensor. The control device 6 controls the solenoid directional valve 4 based on the displacement detected by the displacement sensor 5. During use, the displacement sensor 5 monitors the displacement of the telescopic rods in the first cylinder 2 and the second cylinder 3 in real time and transmits the monitored displacement to the control device 6. The control device 6 adjusts the opening and closing degree of the solenoid directional valve 4 by comparing the displacement of the telescopic rods in the first cylinder 2 and the second cylinder 3, thereby achieving the technical effect of synchronous movement of the cylinders.
[0040] In some embodiments, the electromagnetic directional valve 4 is an electromagnetic proportional directional valve, which is a valve body that controls the displacement of the valve core by a proportional electromagnet, and can realize continuous adjustment of the direction and flow rate of the hydraulic fluid in the hydraulic system.
[0041] In some embodiments, a first hydraulic pump 7 is also included. The oil tank 1 uses the first hydraulic pump 7 to deliver hydraulic oil to the first cylinder 2 or the second cylinder 3, thereby ensuring the normal operation of the liquefaction system. For example, in this embodiment, the first hydraulic pump 7 is electrically connected to the control device 6. The control device 6, based on the feedback signal from the displacement sensor 5, compares the displacement difference between the two cylinders and adjusts the output flow of the hydraulic pump through a control algorithm, thereby achieving precise control of the hydraulic oil flow entering the two cylinders, and thus ensuring the synchronous movement of the two cylinders.
[0042] For example, in this embodiment, the first hydraulic pump 7 can be a gear pump, or a vane pump, piston pump, or any other device that can output hydraulic oil. The type of pump is not a limiting condition.
[0043] In some embodiments, a level sensor 8 is also included. The level sensor 8 is disposed in the oil tank 1. The level sensor 8 detects the level of hydraulic oil in the oil tank 1 to prevent the hydraulic oil in the oil tank 1 from being too much or too little, thereby ensuring the normal operation of the system.
[0044] like Figure 2 As shown, Figure 2This is a schematic diagram of a dual-cylinder synchronous control hydraulic system provided in an embodiment of this application.
[0045] In some embodiments, the system further includes a normally closed valve 9 and a second directional valve 10; a first oil passage 11 and a second oil passage 12 are provided between the first cylinder 2 and the second cylinder 3 and the oil tank 1, the electromagnetic directional valve 4 is disposed in the first oil passage 11, and the normally closed valve 9 and the second directional valve 10 are disposed in the second oil passage 12. It can be understood that the second oil passage 12 is used as a backup in this system. When the first oil passage 11 fails, the normally closed valve 9 is opened, and hydraulic oil is supplied to the first cylinder 2 and the second cylinder 3 through the second oil passage 12, thereby maintaining the normal operation of the first cylinder 2 and the second cylinder 3.
[0046] In some embodiments, the second directional valve 10 is a manual directional valve. It is understood that in this embodiment, the operator controls the opening size of the second directional valve 10 by manual adjustment to ensure that the system can operate normally in the event of a power outage or circuit failure.
[0047] In some embodiments, the second oil circuit 12 also includes a second hydraulic pump 13, which is used to transport hydraulic oil in the oil tank 1 to the first cylinder 2 and the second cylinder 3 through the second oil circuit 12. In this embodiment, the second hydraulic pump 13 is used as a backup so that when the first hydraulic pump 7 is damaged, the second hydraulic pump 13 can normally provide hydraulic oil to the first cylinder 2 and the second cylinder 3.
[0048] In some embodiments, the second hydraulic pump 13 is a manual hydraulic pump. It is understood that in this embodiment, the operator controls the second hydraulic pump 13 to supply hydraulic oil to the first cylinder 2 and the second cylinder 3 by manual operation, so as to ensure that the system can operate normally in the event of a power outage or circuit failure.
[0049] In some embodiments, a ball valve that is reliable in sealing and easy to operate can be used as the normally closed valve 9 to control the passage of the second oil circuit 12.
[0050] In some embodiments, a temperature sensor 14 is also included, which is used to detect the temperature of the hydraulic oil in the oil tank 1, thereby preventing the oil temperature from being too high and affecting the normal operation of the system.
[0051] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.
Claims
1. A dual-cylinder synchronous control hydraulic system, characterized in that, include: The oil tank is used to supply hydraulic oil; A first hydraulic cylinder and a second hydraulic cylinder, both of which are connected to the oil tank, wherein the oil tank supplies hydraulic oil to the first hydraulic cylinder and the second hydraulic cylinder to drive the telescopic rods inside the first hydraulic cylinder and the second hydraulic cylinder to move. An electromagnetic reversing valve is provided between the oil tank and both the first and second oil cylinders. The electromagnetic reversing valve is used to adjust the amount of hydraulic oil delivered from the oil tank to the first or second oil cylinder. A displacement sensor is used to detect the displacement of the telescopic rods in the first and second hydraulic cylinders; The control device includes an electromagnetic directional valve and a displacement sensor, both of which are electrically connected to the control device. The control device controls the electromagnetic directional valve based on the displacement detected by the displacement sensor.
2. The dual-cylinder synchronous control hydraulic system according to claim 1, characterized in that, The solenoid directional valve is an electromagnetic proportional directional valve.
3. The dual-cylinder synchronous control hydraulic system according to claim 1, characterized in that, It also includes a first hydraulic pump, through which the oil tank delivers hydraulic oil to the first cylinder or the second cylinder.
4. The dual-cylinder synchronous control hydraulic system according to claim 1, characterized in that, It also includes a level sensor, which is installed inside the oil tank to detect the level of hydraulic oil in the tank.
5. The dual-cylinder synchronous control hydraulic system according to claim 1, characterized in that, It also includes normally closed valves and second directional valves; Both the first and second oil cylinders are provided with a first oil circuit and a second oil circuit between themselves and the oil tank. The electromagnetic reversing valve is located in the first oil circuit, and the normally closed valve and the second reversing valve are both located in the second oil circuit.
6. The dual-cylinder synchronous control hydraulic system according to claim 5, characterized in that, The second directional valve is a manual directional valve.
7. The dual-cylinder synchronous control hydraulic system according to claim 5, characterized in that, The second oil circuit also includes a second hydraulic pump, which is used to transport the hydraulic oil in the oil tank to the first oil cylinder and the second oil cylinder through the second oil circuit.
8. The dual-cylinder synchronous control hydraulic system according to claim 7, characterized in that, The second hydraulic pump is a manual hydraulic pump.
9. The dual-cylinder synchronous control hydraulic system according to claim 5, characterized in that, The normally closed valve is a ball valve.
10. The dual-cylinder synchronous control hydraulic system according to claim 1, characterized in that, It also includes a temperature sensor for detecting the temperature of the hydraulic oil in the tank.