Double-independent oil source loop system of electro-hydraulic actuating mechanism

Abstract

The utility model relates to the technical field of power oil source loops and control of electro-hydraulic actuating mechanisms, in particular to a double-independent-oil-source-loop system of an electro-hydraulic actuating mechanism, which comprises a first oil source loop and a second oil source loop. The first oil source loop comprises an oil pump oil suction ball valve Q1, an oil pump P1, a motor M1, an overflow valve YR1, a stop valve J1, a filter L1, a differential pressure indicator PDI1, a pressure transmitter PT1, an unloading electromagnetic valve DF1.1 and a one-way valve D1. The second oil source loop comprises an oil pump oil suction ball valve Q2, an oil pump P2, a motor M2, an overflow valve YR2, a stop valve J2, a filter L2, a differential pressure indicator PDI2, a pressure transmitter PT2, an unloading electromagnetic valve DF1.2 and a one-way valve D2. By adopting the two completely independent oil source loops, power energy can be still provided for the whole hydraulic system when any element breaks down, so that the reliability and the safety of the whole set of electro-hydraulic actuating mechanism are greatly improved, and the electro-hydraulic actuating mechanism is very practical.

Description

Technical Field

[0001] The utility model relates to the technical field of power oil source circuits and control of electro-hydraulic actuators, and specifically relates to a dual independent oil source circuit system for electro-hydraulic actuators. Background Technique

[0002] The oil source part of the electro-hydraulic actuator provides power energy for the entire hydraulic system and plays a crucial role in the electro-hydraulic actuator. When a failure occurs in the oil source part, the electro-hydraulic actuator will lose power, unable to control the valve normally, and may even cause the valve to get out of control, greatly affecting the process performance and device safety.

[0003] In the prior art, there are mainly two technical solutions:

[0004] As shown in the attached Figure 1 The single pump and single motor configuration: The oil source part is configured with a single motor, a single oil pump, a single filter, a single differential pressure transmitter, a single overflow valve, and a single unloading solenoid valve. The disadvantage of this solution is that there is no redundant configuration. When any of the above components fails, the entire oil source circuit will not work properly.

[0005] As shown in the attached Figure 2 The dual pump and dual motor configuration: The oil source part is configured with dual motors, dual oil pumps, dual filters, a single differential pressure transmitter, a single overflow valve, and a single unloading solenoid valve. Most of the current electro-hydraulic actuator oil source circuits adopt this solution. Although this solution redundantly configures the motors, oil pumps, and filters, it is not a completely independent dual oil source circuit, and there are still some components in common, such as the differential pressure transmitter, overflow valve, and unloading solenoid valve. It is easy to cause false alarms of the differential pressure transmitter, or when the overflow valve or unloading solenoid valve fails, the entire system cannot provide a hydraulic power source normally, and it cannot meet some high-reliability application scenarios.

[0006] In summary, the above two groups of prior art solutions can no longer meet the existing needs. Therefore, there is an urgent need to design a dual independent oil source circuit system for electro-hydraulic actuators to solve the problems mentioned above. Content of the Utility Model

[0007] The purpose of the utility model is to provide a dual independent oil source circuit system for electro-hydraulic actuators, which configures two completely independent oil source circuits and performs fault self-diagnosis on the two oil source circuits. When any component fails, it can automatically switch to the other circuit to work, so as to solve the problems mentioned in the above background technique.

[0008] To achieve the above purpose, the utility model provides the following technical solutions:

[0009] An electro-hydraulic actuator double independent oil source circuit system, comprising a first oil source circuit, a second oil source circuit and a control system. The first oil source circuit includes an oil pump suction ball valve Q1, an oil pump P1, a motor M1, a relief valve YR1, a stop valve J1, a filter L1, a differential pressure transmitter PDI1, a pressure transmitter PT1, a unloading solenoid valve DF1.1 and a check valve D1. The second oil source circuit includes an oil pump suction ball valve Q2, an oil pump P2, a motor M2, a relief valve YR2, a stop valve J2, a filter L2, a differential pressure transmitter PDI2, a pressure transmitter PT2, a unloading solenoid valve DF1.2 and a check valve D2.

[0010] As a preferred solution of the present utility model, one side of the oil pump suction ball valve Q1 is fixedly connected to the input end of the oil pump P1, and the motor M1 is arranged on the oil pump P1.

[0011] As a preferred solution of the present utility model, the output end of the oil pump P1 is respectively connected to the relief valve YR1 and the stop valve J1. The side of the stop valve J1 far from the oil pump P1 is also connected to the filter L1. One side of the filter L1 is connected to the check valve D1, and the other side of the check valve D1 is connected to the accumulator X1.

[0012] As a preferred solution of the present utility model, one side of the oil pump suction ball valve Q2 is connected to the oil pump P2. The motor M2 is arranged on the oil pump P2. The other side of the oil pump P2 is connected to the stop valve J2, the filter L2 and the check valve D2, and finally connected to the pressure transmitter PT3.

[0013] As a preferred solution of the present utility model, one side of the pressure transmitter PT1 is connected to the unloading solenoid valve DF1.1, and one side of the pressure transmitter PT2 is connected to the unloading solenoid valve DF1.2.

[0014] As a preferred solution of the present utility model, the motor M1, the pressure transmitter PT1, the unloading solenoid valve DF1.1, the motor M2, the differential pressure transmitter PDI2 and the unloading solenoid valve DF1.2 are all connected to the control system.

[0015] The working principle and beneficial effects of the present utility model are as follows:

[0016] The dual independent oil source circuit in the present utility model includes a first oil source circuit and a second oil source circuit. The first oil source circuit consists of an oil pump suction ball valve Q1, an oil pump P1, a motor M1, a relief valve YR1, a stop valve J1, a filter L1, a differential pressure transmitter PDI1, a pressure transmitter PT1, a unloading solenoid valve DF1.1, and a check valve D1. The second oil source circuit consists of an oil pump suction ball valve Q2, an oil pump P2, a motor M2, a relief valve YR2, a stop valve J2, a filter L2, a differential pressure transmitter PDI2, a pressure transmitter PT2, a unloading solenoid valve DF1.2, and a check valve D2. Combining through the attached Figure 3 As can be seen, the two oil source circuits of the first oil source circuit and the second oil source circuit are completely independent and have no common components. By using the above two completely independent oil source circuits, power energy can still be provided for the entire hydraulic system when any component fails, greatly improving the reliability and safety of the entire electro-hydraulic actuator. Brief Description of the Drawings

[0017] Figure 1 is the connection circuit diagram of the prior art solution one;

[0018] Figure 2 is the connection circuit diagram of the prior art solution two;

[0019] Figure 3 is the connection circuit diagram of the first oil source circuit and the second oil source circuit in the present utility model. Detailed Embodiment

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant. Several embodiments of the present utility model are given. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] Please refer to Figures 1 - 3 , this utility model provides a technical solution:

[0025] An electro-hydraulic actuator dual independent oil source circuit system includes a first oil source circuit, a second oil source circuit, and a control system. The first oil source circuit includes an oil pump suction ball valve Q1, an oil pump P1, a motor M1, a relief valve YR1, a stop valve J1, a filter L1, a differential pressure transmitter PDI1, a pressure transmitter PT1, an unloading solenoid valve DF1.1, and a check valve D1. The second oil source circuit includes an oil pump suction ball valve Q2, an oil pump P2, a motor M2, a relief valve YR2, a stop valve J2, a filter L2, a differential pressure transmitter PDI2, a pressure transmitter PT2, an unloading solenoid valve DF1.2, and a check valve D2.

[0026] Specifically, referring to the attached Figure 3 As shown, one side of the oil pump suction ball valve Q1 is fixedly connected to the input end of the oil pump P1, and the motor M1 is arranged on the oil pump P1; the output end of the oil pump P1 is respectively connected to the relief valve YR1 and the stop valve J1. The side of the stop valve J1 away from the oil pump P1 is also connected to the filter L1. One side of the filter L1 is connected to the check valve D1, and the other side of the check valve D1 is connected to the accumulator X1; one side of the oil pump suction ball valve Q2 is connected to the oil pump P2, the motor M2 is arranged on the oil pump P2, and the other side of the oil pump P2 is connected to the stop valve J2, the filter L2, and the check valve D2, and finally connected to the pressure transmitter PT3;

[0027] In this embodiment, the first oil source circuit is used for detailed description. During the operation of the system, the motor M1 is started to work through the control system. The motor M1 drives the oil pump P1 to work. The high-pressure oil passes through the precision filter L1. At the same time, the control system detects the pressure value of the accumulator pressure transmitter PT3. When the pressure value of PT3 is lower than the set lower limit of the pressure, the unloading solenoid valve DF1.1 is closed, and the high-pressure oil passes through the check valve D1 to charge the accumulator X1. When the accumulator pressure is higher than the set upper limit of the pressure, the unloading solenoid valve DF1.1 is opened, and the high-pressure oil returns to the oil tank through DF1.1. Therefore, by controlling the opening and closing of the unloading solenoid valve DF1.1, the upper and lower limit intervals of the accumulator pressure are maintained. The working principle of the second oil source circuit is the same as that of the first oil source circuit, and this solution will not be described again.

[0028] Specifically, referring to the attached Figure 3 As shown, the motor M1, the pressure transmitter PT1, the unloading solenoid valve DF1.1, the motor M2, the differential pressure transmitter PDI2, and the unloading solenoid valve DF1.2 are all connected to the control system;

[0029] In this embodiment, the control system can perform self-diagnosis on the following faults: motor and motor control circuit faults, oil pump faults, overflow valve faults, the unloading solenoid valve cannot be opened normally, the unloading solenoid valve cannot be closed normally, the filter is contaminated, etc. When the above faults occur, the control system displays the fault content on the liquid crystal screen, issues an alarm signal, and automatically switches to another oil source circuit for operation, without affecting the control of the entire electro-hydraulic actuator.

[0030] In summary, the present utility model adopts the above two completely independent oil source circuits, which can still provide power energy for the entire hydraulic system when any component fails, greatly improving the reliability and safety of the entire electro-hydraulic actuator, and is very practical.

[0031] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A dual independent oil source circuit system for an electro-hydraulic actuator, comprising a first oil source circuit, a second oil source circuit and a control system, characterized in that: The first oil source circuit includes an oil pump suction ball valve Q1, an oil pump P1, a motor M1, a relief valve YR1, a stop valve J1, a filter L1, a differential pressure transmitter PDI1, a pressure transmitter PT1, a unloading solenoid valve DF1.1, and a check valve D1. The second oil source circuit includes an oil pump suction ball valve Q2, an oil pump P2, a motor M2, a relief valve YR2, a stop valve J2, a filter L2, a differential pressure transmitter PDI2, a pressure transmitter PT2, a unloading solenoid valve DF1.2, and a check valve D2.

2. The dual independent oil source circuit system of an electro-hydraulic actuator according to claim 1, characterized in that: One side of the oil pump suction ball valve Q1 is fixedly connected to the input end of the oil pump P1, and the motor M1 is arranged on the oil pump P1.

3. The dual independent oil source circuit system of an electro-hydraulic actuator according to claim 1, characterized in that: The output end of the oil pump P1 is respectively connected to the relief valve YR1 and the stop valve J1. The side of the stop valve J1 away from the oil pump P1 is also connected to the filter L1. One side of the filter L1 is connected to the check valve D1, and the other side of the check valve D1 is connected to the accumulator X1.

4. A dual independent oil source circuit system for an electro-hydraulic actuator, as claimed in claim 1, wherein: One side of the oil pump suction ball valve Q2 is connected to the oil pump P2. The motor M2 is arranged on the oil pump P2. The other side of the oil pump P2 is connected to the stop valve J2, the filter L2, and the check valve D2, and finally connected to the pressure transmitter PT3.

5. A dual independent oil source circuit system for an electro-hydraulic actuator according to claim 1, characterized in that: One side of the pressure transmitter PT1 is connected to the unloading solenoid valve DF1.1, and one side of the pressure transmitter PT2 is connected to the unloading solenoid valve DF1.

2.

6. The double independent oil source circuit system of an electro-hydraulic actuator according to claim 1, characterized in that: The motor M1, the pressure transmitter PT1, the unloading solenoid valve DF1.1, the motor M2, the differential pressure transmitter PDI2, and the unloading solenoid valve DF1.2 are all connected to the control system.

Images