Electro-hydraulic actuators and their usage methods

Abstract

This invention belongs to the field of transmission device technology, specifically relating to an electro-hydraulic actuator and its usage method. The electro-hydraulic actuator includes: a controller, a plunger pump motor, a plunger pump body, a hydraulic oil tank, an electro-hydraulic actuator, a fluid-passing mechanism, and an insulation detection module. When the insulation value of the plunger pump motor is lower than a set insulation value, the controller is also configured to drive the fluid-passing mechanism to operate, causing the plunger pump body to pump hydraulic oil into the plunger pump motor, until the plunger pump motor drives the plunger pump body to drive the electro-hydraulic actuator to complete the current action. This invention uses the insulation detection module to detect the insulation value of the plunger pump motor in real time. At the moment of insulation failure in the plunger pump motor, hydraulic oil is passed into the plunger pump motor through the fluid-passing mechanism. Utilizing the hydraulic oil as a temporary insulating medium, the plunger pump motor stably and safely drives the plunger pump body to cooperate with the electro-hydraulic actuator to fully open or close the valve even in the event of insulation failure.

Description

Technical Field

[0001] This invention belongs to the field of engineering components technology, specifically relating to transmission devices, and more particularly to an electro-hydraulic actuator and its usage method. Background Technology

[0002] During operation, electro-hydraulic valves (consisting of a motor, a plunger pump, and a valve) pose a risk of insulation failure to the motor. If the valve driven by the motor is in a semi-open state, and the motor needs to stop working, the valve must be fully opened or fully closed. This requires the motor to continue operating even with insulation failure, which means the motor is leaking electricity, posing a safety hazard.

[0003] Therefore, there is an urgent need to develop a new electro-hydraulic actuator and its usage method to solve the technical problem of how to safely open and close an electro-hydraulic valve in the event of insulation failure.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0005] This disclosure provides at least one electro-hydraulic actuator and its usage method.

[0006] In a first aspect, embodiments of this disclosure provide an electro-hydraulic actuator, comprising: a controller, a plunger pump motor, a plunger pump body, a hydraulic oil tank, an electro-hydraulic actuator, a fluid-passing mechanism, and an insulation detection module; wherein the plunger pump motor is connected to the plunger pump body, the hydraulic oil tank is connected to the plunger pump body, and the plunger pump body is connected to the electro-hydraulic actuator; the fluid-passing mechanism is connected to the plunger pump body, the fluid-passing mechanism is connected to the plunger pump motor, and the plunger pump motor is connected to the hydraulic oil tank; the fluid-passing mechanism and the insulation detection module are electrically connected to the controller, and the insulation detection module is electrically connected to the plunger pump motor. When the plunger pump motor drives the plunger pump body to operate, the plunger pump body pumps hydraulic oil from the hydraulic oil tank into the electro-hydraulic actuator to drive the valve connected to the electro-hydraulic actuator to open or close. The controller is configured to obtain the insulation parameters of the plunger pump motor through the insulation detection module. That is, when the insulation value of the plunger pump motor is lower than the set insulation value, the controller is also configured to drive the electronic valve in the fluid passage mechanism to open, so that the plunger pump body pumps hydraulic oil into the plunger pump motor, until the plunger pump motor drives the plunger pump body to drive the electro-hydraulic actuator to complete the opening or closing of the valve.

[0007] In one optional embodiment, the electro-hydraulic actuator includes: a housing, a piston unit, and an actuator unit; the housing has an oil passage chamber, the piston unit is located in the oil passage chamber, and the oil passage chamber is connected to the plunger pump body; the actuator unit is located in the housing, the actuator unit meshes with the piston unit, and the actuator unit is connected to a valve; the plunger pump body pumps hydraulic oil into the oil passage chamber to push the piston unit to move within the oil passage chamber, thereby driving the actuator unit to rotate, i.e., driving the valve to open or close.

[0008] In one optional embodiment, the piston unit includes a piston rod; the actuation unit includes an actuation rod; the piston rod is arranged laterally and a first gear portion is provided on the piston rod; the actuation rod is arranged longitudinally and a second gear portion is provided on the actuation rod; the first gear portion and the second gear portion are meshed; when the piston rod moves in the oil passage chamber, the actuation rod rotates under the drive of the piston rod.

[0009] In one optional embodiment, the fluid-passing mechanism includes: an electronic valve; one side of the electronic valve is connected to the plunger pump body, the other side of the electronic valve is connected to the plunger pump motor, and the electronic valve is electrically connected to a controller; when the insulation value of the plunger pump motor is lower than a set insulation value, the controller is configured to drive the electronic valve to open, so that the plunger pump body pumps hydraulic oil into the plunger pump motor.

[0010] In one optional embodiment, a pressure sensor is provided in the pump body of the plunger pump, and the pressure sensor is electrically connected to the controller; the controller is configured to detect the pressure data of the hydraulic oil through the pressure sensor, so that the hydraulic oil penetrates into the coil winding of the plunger pump motor, that is, when the insulation value of the plunger pump motor is lower than the set insulation value and the pressure data is higher than the set pressure, the controller is configured to drive the electronic valve to open.

[0011] In one optional embodiment, when the insulation value of the plunger pump motor is higher than the set insulation value, the output power of the plunger pump motor is equal to the maximum power of the plunger pump motor multiplied by a set ratio, and the set ratio is less than 1.

[0012] In one optional embodiment, the electro-hydraulic actuator further includes: a filtering mechanism; the filtering mechanism is connected to a plunger pump motor and a hydraulic oil tank; the filtering mechanism is used to filter impurities in the hydraulic oil flowing from the plunger pump motor to the hydraulic oil tank.

[0013] In one optional embodiment, the filtration mechanism includes a filter tube and filter cotton; the filter tube connects the plunger pump motor and the hydraulic oil tank, and the filter cotton is located in the filter tube.

[0014] In one alternative implementation, the insulation detection module includes an insulation detector for performing insulation detection on the plunger pump motor.

[0015] Secondly, this disclosure also provides a method of using the electro-hydraulic actuator as described above, comprising: when the plunger pump motor drives the plunger pump body to operate, the plunger pump body pumps hydraulic oil from the hydraulic oil tank into the electro-hydraulic actuator to drive the valve connected to the electro-hydraulic actuator to open or close; the controller is configured to obtain the insulation parameters of the plunger pump motor through the insulation detection module, that is, when the insulation value of the plunger pump motor is lower than the set insulation value, the controller is further configured to drive the fluid passage mechanism to operate, so that the plunger pump body pumps hydraulic oil into the plunger pump motor, until the plunger pump motor drives the plunger pump body to drive the electro-hydraulic actuator to complete the current action.

[0016] The beneficial effect of this invention is that it detects the insulation value of the plunger pump motor in real time through an insulation detection module. When the plunger pump motor fails to insulation, hydraulic oil is introduced into the plunger pump motor through a fluid-passing mechanism. The hydraulic oil is used as a temporary insulating medium to enable the plunger pump motor to stably and safely drive the plunger pump body in conjunction with the electro-hydraulic actuator to fully open or close the valve when the insulation fails.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a structural diagram of an electro-hydraulic actuator provided in an embodiment of the present disclosure;

[0021] Figure 2 An internal structural diagram of an electro-hydraulic actuator provided in an embodiment of this disclosure;

[0022] Figure 3 A structural diagram of an electro-hydraulic actuator provided in an embodiment of this disclosure;

[0023] Figure 4 An internal structural diagram of an electro-hydraulic actuator provided in an embodiment of this disclosure;

[0024] Figure 5 This is a schematic block diagram of an electro-hydraulic actuator provided in an embodiment of the present disclosure.

[0025] In the picture:

[0026] 1. Plunger pump motor;

[0027] 2. Plunger pump body;

[0028] 3. Electro-hydraulic actuator; 31. Housing; 311. Oil passage chamber; 32. Piston unit; 321. Piston rod; 321a. First gear section; 33. Actuation unit; 331. Actuating rod; 331a. Second gear section;

[0029] 4. Fluid conveying mechanism; 41. Electronic valve;

[0030] 5. Valves. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0033] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0034] Research has revealed that during the operation of an electro-hydraulic valve (composed of a motor, a plunger pump, and a valve), if an abnormality in the motor's insulation is detected for the first time, the motor is on the verge of failure. If the valve driven by the motor is in a semi-open state at this time, and the valve must be fully opened or fully closed for the motor to stop working, then the motor continuing to work when the insulation fails poses a safety hazard.

[0035] Based on the above research, this disclosure provides an electro-hydraulic actuator and its usage method, which injects insulating hydraulic oil into the plunger pump motor to act as an insulating medium, ensuring the normal operation of the plunger pump motor for a short period of time.

[0036] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure below should be considered as the inventor's contribution to this disclosure.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] like Figures 1 to 5As shown, at least one embodiment provides an electro-hydraulic actuator, comprising: a controller, a plunger pump motor 1, a plunger pump body 2, a hydraulic oil tank, an electro-hydraulic actuator 3, a fluid supply mechanism 4, and an insulation detection module; wherein the plunger pump motor 1 is connected to the plunger pump body 2, the hydraulic oil tank is connected to the plunger pump body 2, and the plunger pump body 2 is connected to the electro-hydraulic actuator 3; the fluid supply mechanism 4 is connected to the plunger pump body 2, the fluid supply mechanism 4 is connected to the plunger pump motor 1, and the plunger pump motor 1 is connected to the hydraulic oil tank; the fluid supply mechanism 4 and the insulation detection module are electrically connected to the controller, and the insulation detection module is electrically connected to the plunger pump... The motor 1 is electrically connected; when the plunger pump motor 1 drives the plunger pump body 2 to operate, the plunger pump body 2 pumps hydraulic oil from the hydraulic oil tank into the electro-hydraulic actuator 3 to drive the valve 5 connected to the electro-hydraulic actuator 3 to open or close; the controller is configured to obtain the insulation parameters of the plunger pump motor 1 through the insulation detection module, that is, when the insulation value of the plunger pump motor 1 is lower than the set insulation value, the controller is also configured to drive the fluid passage mechanism 4 to operate, so that the plunger pump body 2 pumps hydraulic oil into the plunger pump motor 1, until the plunger pump motor 1 drives the plunger pump body 2 to drive the electro-hydraulic actuator 3 to complete the current action.

[0040] Specifically, the insulation detection module may be, but is not limited to, an insulation detector, capable of performing insulation detection on the plunger pump motor 1.

[0041] Specifically, the insulation parameters of the plunger pump motor 1 refer to the insulation value of the internal coil windings of the plunger pump motor 1.

[0042] In at least one embodiment, the insulation value of the plunger pump motor 1 is detected in real time by the insulation detection module. When the plunger pump motor 1 experiences insulation failure, hydraulic oil is introduced into the plunger pump motor 1 through the fluid inlet mechanism 4. The hydraulic oil is used as a temporary insulating medium to enable the plunger pump motor 1 to stably and safely drive the plunger pump body 2 to cooperate with the electro-hydraulic actuator 3 to fully open or close the valve 5 when the insulation fails.

[0043] In at least one embodiment, please refer to Figure 3 , Figure 4 The electro-hydraulic actuator 3 includes: a housing 31, a piston unit 32, and an actuator 33; the housing 31 has an oil passage chamber 311, the piston unit 32 is located in the oil passage chamber 311, and the oil passage chamber 311 is connected to the plunger pump body 2; the actuator 33 is located in the housing 31, the actuator 33 meshes with the piston unit 32, and the actuator 33 is connected to the valve 5; the plunger pump body 2 pumps hydraulic oil into the oil passage chamber 311 to push the piston unit 32 to move in the oil passage chamber 311, thereby driving the actuator 33 to rotate, that is, driving the valve 5 to open or close.

[0044] Specifically, the piston unit 32 divides the oil passage chamber 311 into a left oil chamber and a right oil chamber, and the plunger pump body 2 is connected to the left oil chamber and the right oil chamber respectively. When the plunger pump body 2 pumps hydraulic oil into the left oil chamber, it pushes the piston unit 32 to move to the right in the oil passage chamber 311; when the plunger pump body 2 pumps hydraulic oil into the right oil chamber, it pushes the piston unit 32 to move to the left in the oil passage chamber 311. This enables the actuator 33 to rotate clockwise or counterclockwise, thereby opening or closing the valve 5.

[0045] In at least one embodiment, please refer to Figure 4 The piston unit 32 includes a piston rod 321; the actuation unit 33 includes an actuation rod 331; the piston rod 321 is arranged laterally and a first gear portion 321a is provided on the piston rod 321; the actuation rod 331 is arranged longitudinally and a second gear portion 331a is provided on the actuation rod 331; the first gear portion 321a and the second gear portion 331a are meshed; when the piston rod 321 moves in the oil passage chamber 311, the actuation rod 331 rotates under the drive of the piston rod 321.

[0046] Specifically, the piston rod 321 is sealed on both sides with the oil passage chamber 311, thereby enabling the piston rod 321 to move within the oil passage chamber 311.

[0047] Specifically, when the piston rod 321 moves within the oil passage 311, the first gear part 321a meshes with the second gear part 331a, thereby enabling the actuator 331 to rotate. Simultaneously, the actuator 331 is connected to the valve 5, thereby opening or closing the valve 5.

[0048] In at least one embodiment, please refer to Figure 2 The fluid supply mechanism 4 includes an electronic valve 41; one side of the electronic valve 41 is connected to the plunger pump body 2, the other side of the electronic valve 41 is connected to the plunger pump motor 1, and the electronic valve 41 is electrically connected to a controller; when the insulation value of the plunger pump motor 1 is lower than the set insulation value, the controller is configured to drive the electronic valve 41 to open, so that the plunger pump body 2 pumps hydraulic oil into the plunger pump motor 1.

[0049] Specifically, when the insulation value of the plunger pump motor 1 is detected to decrease, and the insulation value of the plunger pump motor 1 continues to decrease within a set time, it is determined that the insulation of the plunger pump motor 1 is abnormal. The electronic valve 41 is opened, and the hydraulic oil is diverted from the plunger pump body 2 to the interior of the plunger pump motor 1. At this time, the pressurized hydraulic oil will enter the interior of the plunger pump motor 1. The pressurized hydraulic oil will seep into the coil winding under the action of pressure. The hydraulic oil temporarily acts as an insulating layer. When the insulation level begins to rise, the valve 5 is fully opened or fully closed.

[0050] In at least one embodiment, please refer to Figure 5 A pressure sensor is installed inside the plunger pump body 2, and the pressure sensor is electrically connected to the controller. The controller is configured to detect the pressure data of the hydraulic oil through the pressure sensor so that the hydraulic oil can penetrate into the coil winding of the plunger pump motor 1. That is, when the insulation value of the plunger pump motor 1 is lower than the set insulation value and the pressure data is higher than the set pressure, the controller is configured to drive the electronic valve 41 to open.

[0051] Specifically, the coil winding permeation pressure of the 48V motor requires a hydraulic oil flow rate of 1.0~1.5m / s to set the pressure to 0.10~0.16MPa.

[0052] Specifically, hydraulic oil with a certain pressure can improve the effect of repairing the insulation of the plunger pump motor 1. Hydraulic oil without pressure can barely adhere to the coil winding inside the plunger pump motor 1, while hydraulic oil with pressure can penetrate and adhere to the coil winding inside the plunger pump motor 1 with a certain pressure.

[0053] In at least one embodiment, when the insulation value of the plunger pump motor 1 is higher than the set insulation value, the output power of the plunger pump motor 1 is equal to the maximum power of the plunger pump motor 1 multiplied by a set ratio, and the set ratio is less than 1.

[0054] Specifically, the ratio can be set to 0.8.

[0055] Specifically, when the electro-hydraulic actuator is working, the plunger pump motor 1 will output 80% power, with a 20% reserve power. On one hand, when insulation failure is detected, hydraulic oil is replenished into the plunger pump motor 1 (when the insulation value no longer decreases), and the plunger pump motor 1 will increase its power until the pressure of the power system returns to normal, meeting the requirement for valve 5 to fully open or close once. On the other hand, the entry of hydraulic oil into the plunger pump motor 1 will affect its operation; therefore, a reserve power is necessary to prevent the hydraulic oil from affecting the operation of the plunger pump motor 1.

[0056] In at least one embodiment, the electro-hydraulic actuator further includes: a filtering mechanism; the filtering mechanism is connected to the plunger pump motor 1 and the filtering mechanism is connected to the hydraulic oil tank; the filtering mechanism is used to filter impurities in the hydraulic oil flowing from the plunger pump motor 1 to the hydraulic oil tank.

[0057] Specifically, the function of the filtration mechanism is to filter impurities flowing out from inside the plunger pump motor 1.

[0058] In at least one embodiment, the filtration mechanism includes a filter tube and filter cotton; the filter tube is connected to the plunger pump motor 1 and the hydraulic oil tank, and the filter cotton is located in the filter tube.

[0059] Based on the same technical concept, at least one embodiment also provides a method of using the electro-hydraulic actuator as described above, which includes: when the plunger pump motor 1 drives the plunger pump body 2 to operate, the plunger pump body 2 pumps hydraulic oil from the hydraulic oil tank into the electro-hydraulic actuator 3 to drive the valve 5 connected to the electro-hydraulic actuator 3 to open or close; the controller is configured to obtain the insulation parameters of the plunger pump motor 1 through the insulation detection module, that is, when the insulation value of the plunger pump motor 1 is lower than the set insulation value, the controller is also configured to drive the fluid passage mechanism 4 to operate, so that the plunger pump body 2 pumps hydraulic oil into the plunger pump motor 1, until the plunger pump motor 1 drives the plunger pump body 2 to drive the electro-hydraulic actuator 3 to complete the current action.

[0060] In summary, this invention uses an insulation detection module to detect the insulation value of the plunger pump motor in real time. When the plunger pump motor experiences insulation failure, hydraulic oil is introduced into the plunger pump motor through a fluid-passing mechanism. The hydraulic oil serves as a temporary insulating medium, enabling the plunger pump motor to stably and safely drive the plunger pump body in conjunction with the electro-hydraulic actuator to fully open or close the valve when insulation fails.

[0061] The disclosures and other solutions, examples, embodiments, modules, and functional operations described in this document can be implemented in digital electronic circuits, or computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or combinations thereof. The disclosures and other embodiments can be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a tangible and non-volatile computer-readable medium for execution by a data processing apparatus or for controlling the operation of the data processing apparatus. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a storage device, a material composition that influences machine-readable propagated signals, or one or more of these. The terms "data processing unit" or "data processing apparatus" include all means, devices, and machines for processing data, including, for example, programmable processors, computers, or multiprocessors or computer groups. In addition to hardware, the apparatus may also include code that creates an execution environment for a computer program, such as code constituting processor firmware, a protocol stack, a database management system, an operating system, or combinations thereof. The propagated signals are artificially generated signals, such as machine-generated electrical, optical, or electromagnetic signals, which are generated to encode information for transmission to a suitable receiver device.

[0062] Computer programs (also known as programs, software, software applications, scripts, or code) can be written in any programming language (including compiled or interpreted languages) and can be deployed in any form, including as standalone programs or as modules, components, subroutines, or other units suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to that program, or in multiple coordinating files (e.g., a file storing one or more modules, subroutines, or portions of code). Computer programs can be deployed and executed on one or more computers located at a single site or distributed across multiple sites interconnected by a communication network.

[0063] The processing and logic flows described in this document can be executed by one or more programmable processors that execute one or more computer programs to perform functions by manipulating input data and generating outputs. The processing and logic flows can also be executed by special-purpose logic circuitry, and the devices can be implemented as special-purpose logic circuitry, such as FPGAs (Field-Programmable Gate Arrays) or ASICs (Application-Specific Integrated Circuits).

[0064] For example, processors suitable for executing computer programs include general-purpose and special-purpose microprocessors, as well as any one or more of any type of digital computer. Typically, the processor receives instructions and data from read-only memory or random access memory, or both. The basic components of a computer are a processor that executes instructions and one or more storage devices that store the instructions and data. Typically, a computer will also include one or more mass storage devices for storing data, such as magnetic disks, magneto-optical disks, or optical disks, or operatively coupled to receive data from or transfer data to mass storage devices, or both. However, a computer does not necessarily have such devices. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, including, for example, semiconductor memory devices such as erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; and optical disc read-only memory (CD ROM) and digital versatile optical disc read-only memory (DVD-ROM). The processor and memory may be supplemented by dedicated logic circuitry or incorporated into dedicated logic circuitry.

[0065] While this patent document contains numerous details, it should not be construed as limiting the scope of any invention or claim, but rather as a description of features of specific embodiments of a particular invention. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various functions described in the context of a single embodiment may also be implemented individually in multiple embodiments, or in any suitable sub-combination. Furthermore, although the foregoing features may be described as functioning in certain combinations, or even initially claimed to be so, in certain circumstances, one or more features from a combination of claims may be removed from the combination, and a combination of claims may refer to a sub-combination or a variation of a sub-combination.

[0066] Similarly, although the operations are described in a specific order in the accompanying drawings, this should not be construed as requiring the specific order or sequence shown to perform such operations, or all the described operations, in order to obtain the desired result. Furthermore, the separation of various system components in the embodiments of this patent document should not be construed as requiring such separation in all embodiments.

[0067] Only some implementations and examples are described; other implementations, enhancements, and variations can be made based on the content described and illustrated in this patent document.

[0068] When no intermediate component exists other than a line, trace, or other medium between the first and second components, the first component is directly coupled to the second component. When an intermediate component other than a line, trace, or other medium exists between the first and second components, the first component is indirectly coupled to the second component. The term "coupling" and its variations include direct coupling and indirect coupling. Unless otherwise stated, the term "about" is used to mean a range including upper and lower 10% of the value.

[0069] While several embodiments are provided in this disclosure, it should be understood that the disclosed systems and methods may be embodied in many other specific forms without departing from the spirit or scope of this disclosure. The present examples are intended to be illustrative rather than restrictive and are not limited to the details given. For example, various elements or components may be combined or integrated into another system, or certain features may be omitted or not implemented.

[0070] In the several embodiments provided herein, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0071] Furthermore, without departing from the scope of this disclosure, the discrete or individual technologies, systems, subsystems, and methods described and illustrated in the various embodiments may be combined or integrated with other systems, modules, technologies, or methods. Other items shown or discussed as coupled may be directly connected or indirectly coupled or communicated via some interface, device, or intermediate component in an electrical, mechanical, or other manner. Those skilled in the art can identify other examples of changes, substitutions, and modifications without departing from the spirit and scope of this disclosure.

Claims

1. An electro-hydraulic actuator, characterized in that, include: The system comprises a controller, a plunger pump motor (1), a plunger pump body (2), a hydraulic oil tank, an electro-hydraulic actuator (3), a fluid supply mechanism (4), and an insulation detection module; among which... The plunger pump motor (1) is connected to the plunger pump body (2), the hydraulic oil tank is connected to the plunger pump body (2), and the plunger pump body (2) is connected to the electro-hydraulic actuator (3). The fluid feeding mechanism (4) is connected to the plunger pump body (2), the fluid feeding mechanism (4) is connected to the plunger pump motor (1), and the plunger pump motor (1) is connected to the hydraulic oil tank; The liquid flow mechanism (4), the insulation detection module and the controller are electrically connected, and the insulation detection module is electrically connected to the plunger pump motor (1); When the plunger pump motor (1) drives the plunger pump body (2) to operate, the plunger pump body (2) pumps the hydraulic oil in the hydraulic oil tank into the electro-hydraulic actuator (3) to drive the valve (5) connected to the electro-hydraulic actuator (3) to open or close. The controller is configured to obtain the insulation parameters of the plunger pump motor (1) through the insulation detection module, and when the insulation value of the plunger pump motor (1) is lower than the set insulation value, the controller is also configured to drive the electronic valve (41) in the fluid passage mechanism (4) to open, so that the plunger pump body (2) pumps hydraulic oil into the plunger pump motor (1) until the plunger pump motor (1) drives the plunger pump body (2) to drive the electro-hydraulic actuator (3) to complete the opening (5) or closing (5) of the valve. The electro-hydraulic actuator (3) includes: a housing (31), a piston unit (32), and an actuator (33). The housing (31) has an oil passage chamber (311) inside, the piston unit (32) is located in the oil passage chamber (311), and the oil passage chamber (311) is connected to the plunger pump body (2); The actuator (33) is located inside the housing (31), the actuator (33) meshes with the piston unit (32), and the actuator (33) is connected to the valve (5); The plunger pump body (2) pumps hydraulic oil into the oil passage chamber (311) to push the piston unit (32) to move within the oil passage chamber (311), thereby driving the actuator unit (33) to rotate, that is, driving the valve (5) to open or close.

2. The electro-hydraulic actuator as described in claim 1, characterized in that, The piston unit (32) includes: a piston rod (321); The execution unit (33) includes: an execution lever (331); The piston rod (321) is arranged laterally, and a first gear portion (321a) is provided on the piston rod (321). The actuator (331) is arranged longitudinally, and a second gear (331a) is provided on the actuator (331). The first gear section (321a) and the second gear section (331a) are meshed together; When the piston rod (321) moves in the oil passage (311), the actuator (331) rotates under the drive of the piston rod (321).

3. The electro-hydraulic actuator as described in claim 1, characterized in that, The fluid passage mechanism (4) includes: an electronic valve (41); One side of the electronic valve (41) is connected to the plunger pump body (2), the other side of the electronic valve (41) is connected to the plunger pump motor (1), and the electronic valve (41) is electrically connected to the controller. When the insulation value of the plunger pump motor (1) is lower than the set insulation value, the controller is configured to drive the electronic valve (41) to open so that the plunger pump body (2) pumps hydraulic oil into the plunger pump motor (1).

4. The electro-hydraulic actuator as described in claim 3, characterized in that, A pressure sensor is installed inside the plunger pump body (2), and the pressure sensor is electrically connected to the controller; The controller is configured to detect the pressure data of the hydraulic oil through a pressure sensor so that the hydraulic oil penetrates into the coil winding of the piston pump motor (1). That is, when the insulation value of the piston pump motor (1) is lower than the set insulation value and the pressure data is higher than the set pressure, the controller is configured to drive the electronic valve (41) to open.

5. The electro-hydraulic actuator as described in claim 1, characterized in that, When the insulation value of the plunger pump motor (1) is higher than the set insulation value, the output power of the plunger pump motor (1) = the maximum power of the plunger pump motor (1) × the set ratio, and the set ratio is less than 1.

6. The electro-hydraulic actuator as described in claim 1, characterized in that, Also includes: Filtration mechanism; The filter mechanism is connected to the plunger pump motor (1) and the filter mechanism is connected to the hydraulic oil tank; The filtration mechanism is used to filter impurities in the hydraulic oil flowing from the plunger pump motor (1) to the hydraulic oil tank.

7. The electro-hydraulic actuator as described in claim 6, characterized in that, The filtration mechanism includes: a filter tube and filter cotton; The filter tube connects the plunger pump motor (1) to the hydraulic oil tank, and the filter cotton is located in the filter tube.

8. The electro-hydraulic actuator as described in claim 1, characterized in that, The insulation testing module includes an insulation tester for performing insulation testing on the plunger pump motor (1).

9. A method of using the electro-hydraulic actuator as described in any one of claims 1-8, characterized in that, include: When the plunger pump motor (1) drives the plunger pump body (2) to operate, the plunger pump body (2) pumps the hydraulic oil in the hydraulic oil tank into the electro-hydraulic actuator (3) to drive the valve (5) connected to the electro-hydraulic actuator (3) to open or close. The controller is configured to obtain the insulation parameters of the plunger pump motor (1) through the insulation detection module. When the insulation value of the plunger pump motor (1) is lower than the set insulation value, the controller is also configured to drive the fluid passage mechanism (4) to operate so that the plunger pump body (2) pumps hydraulic oil into the plunger pump motor (1) until the plunger pump motor (1) drives the plunger pump body (2) to drive the electro-hydraulic actuator (3) to complete the current action.

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