Servo valve operation state monitoring method fusing EH oil pipeline vibration parameters

Abstract

The invention discloses a servo valve operation state monitoring system and method fusing EH oil pipeline vibration parameters. The method comprises the steps that vibration information of an EH oil pipeline is obtained; eH oil pressure information in an EH oil pipeline is obtained; and according to the vibration information of the EH oil pipeline and the EH oil pressure information, whether the servo valve on the EH oil pipeline operates normally or not is judged. According to the method, the system, the equipment and the medium, the operation state of the servo valve can be accurately detected.

Description

Technical Field

[0001] The invention belongs to the field of steam turbine generator set operating status monitoring, and relates to a servo valve operating status monitoring system and method integrating EH oil pipeline vibration parameters. Background Art

[0002] The steam turbine control system is an important system that can ensure the working efficiency of the unit and change its power according to production needs. With the development of computer technology and automatic control in the field of steam turbine operation and maintenance, a new electro-hydraulic control system (DEH) with more powerful functions and higher control accuracy has been applied to large units at home and abroad at this stage.

[0003] The function of the EH system is to accept the output command of the DEH control system, control the opening of the steam inlet valve of the steam turbine, change the steam flow entering the steam turbine, and meet the requirements of the turbine speed and load regulation. This process is performed with the help of EH oil to drive the servo valve and other hydraulic components. The function of the servo valve is to convert the low-power electrical signal into a high-power hydraulic output, and with the help of the hydraulic actuator, the purpose of automatic control of the equipment is achieved. Due to its fast response speed and high output power, there is currently no other type of actuator that can replace it.

[0004] The jamming of the servo valve is one of the common faults in the turbine speed control system. Generally speaking, the main reason for the jamming of the servo valve may be that the valve stem undergoes irregular deformation under the action of long-term high-temperature steam, causing the valve stem and the valve sleeve to get stuck when the regulating valve is actuated; or impurities in the power oil enter the oil cylinder, causing the oil motor piston to get stuck, thus causing the entire speed control mechanism to fail; if the quality of the ultra-high pressure steam is unqualified, salt will form inside the cylinder after the turbine has been running for a long time. These impurities may enter the gap between the valve stem and the sealing surface of the speed control steam valve, and may also cause the valve stem to move insensitively.

[0005] At present, only the EH oil pressure related parameters are collected, which is difficult to directly reflect the servo valve stuck and other faults, which seriously affects the safe and reliable operation of the unit. The monitoring of abnormal vibration of the EH oil pipeline can characterize the servo valve stuck fault.

[0006] To sum up, at this stage, there is an urgent need to invent a servo valve operation status monitoring method that integrates the vibration parameters of the EH oil pipeline to provide decision support for on-site operation and maintenance engineers. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a servo valve operation status monitoring system and method integrating EH oil pipeline vibration parameters. The method and system can accurately detect the operation status of the servo valve.

[0008] To achieve the above object, the present invention discloses a servo valve operation status monitoring method integrating EH oil pipeline vibration parameters, comprising:

[0009] Obtain vibration information of EH oil pipeline;

[0010] Obtain EH oil pressure information in the EH oil pipeline;

[0011] Whether the servo valve on the EH oil pipeline operates normally is determined according to the vibration information of the EH oil pipeline and the EH oil pressure information.

[0012] The further improvement of the servo valve operation status monitoring method integrating EH oil pipeline vibration parameters described in the present invention is:

[0013] Furthermore, a vibration sensor is arranged on the EH oil pipeline, and vibration information of the EH oil pipeline is obtained through the vibration sensor.

[0014] Further, the process of judging whether the servo valve on the EH oil pipeline is operating normally according to the vibration information of the EH oil pipeline and the EH oil pressure information is as follows:

[0015] When the EH oil pressure in the EH oil pipeline is greater than the preset oil pressure, and the vibration amplitude of the EH oil pipeline is greater than or equal to the preset amplitude, it means that the EH oil is blocked in the EH oil pipeline and cannot flow normally, and the servo valve on the EH oil pipeline is stuck.

[0016] Furthermore, it also includes:

[0017] The faulty servo valve is repaired or replaced. After the servo valve is replaced, when the drop amplitude of the EH oil pressure of the EH oil pipeline is greater than or equal to the preset amplitude, and the vibration amplitude of the EH oil pipeline is less than or equal to the preset amplitude, it proves that the servo valve is indeed faulty. Otherwise, an alarm signal is generated.

[0018] The present invention discloses a servo valve operation status monitoring system integrating EH oil pipeline vibration parameters, comprising:

[0019] A first acquisition module is used to acquire vibration information of the EH oil pipeline;

[0020] A second acquisition module is used to acquire EH oil pressure information in the EH oil pipeline;

[0021] The judgment module is used to judge whether the servo valve on the EH oil pipeline is operating normally according to the vibration information of the EH oil pipeline and the EH oil pressure information.

[0022] The further improvement of the servo valve operation status monitoring system integrating EH oil pipeline vibration parameters of the present invention is:

[0023] Furthermore, a vibration sensor is arranged on the EH oil pipeline, and vibration information of the EH oil pipeline is obtained through the vibration sensor.

[0024] Further, the process of judging whether the servo valve on the EH oil pipeline is operating normally according to the vibration information of the EH oil pipeline and the EH oil pressure information is as follows:

[0025] When the EH oil pressure in the EH oil pipeline is greater than the preset oil pressure, and the vibration amplitude of the EH oil pipeline is greater than or equal to the preset amplitude, it means that the EH oil is blocked in the EH oil pipeline and cannot flow normally, and the servo valve on the EH oil pipeline is stuck.

[0026] Furthermore, it also includes:

[0027] The replacement module is used to repair or replace a faulty servo valve. After the servo valve is replaced, when the drop in EH oil pressure in the EH oil pipeline is greater than or equal to a preset amplitude, and the vibration amplitude of the EH oil pipeline is less than or equal to a preset amplitude, it proves that the servo valve is indeed faulty. Otherwise, an alarm signal is generated.

[0028] The present invention discloses a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the servo valve operation status monitoring method integrating EH oil pipeline vibration parameters are implemented.

[0029] The present invention discloses a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the servo valve operation status monitoring method integrating EH oil pipeline vibration parameters are implemented.

[0030] The present invention has the following beneficial effects:

[0031] The servo valve operation status monitoring system and method integrating the vibration parameters of the EH oil pipeline described in the present invention determines whether the servo valve on the EH oil pipeline is operating normally according to the vibration information of the EH oil pipeline and the EH oil pressure information during specific operation, and is compatible with the vibration signal of the EH oil pipeline to accurately detect the operation status of the servo valve. The operation is convenient and simple, and the practicability is very strong, providing decision support for on-site operation and maintenance engineers. It should be noted that the EH oil pipeline vibration measurement point and the existing oil pressure measurement point in the present invention jointly provide status characterization for the operation of the servo valve in the adjacent part of the system, which solves the problem that a single oil pressure measurement point is difficult to fully characterize the operation status of the servo valve at this stage. It has great universality, is easy to implement in production, and has promotion and application value.

[0032] Furthermore, the DCS system collects and organizes relevant parameters of the unit's EH pipeline vibration and oil pressure to provide a reference benchmark for determining the operating status of the servo valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0034] Figure 1 Flow chart of the method of the present invention. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0037] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0038] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0039] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0040] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0042] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0043] Embodiment 1

[0044] refer to Figure 1 The servo valve operation status monitoring method integrating EH oil pipeline vibration parameters of the present invention comprises the following steps:

[0045] 1) Arranging a vibration sensor at a position where vibration is likely to occur on the EH oil pipeline, and obtaining vibration information of the EH oil pipeline through the vibration sensor;

[0046] Specifically, the displacement sensor sends the collected vibration information to the DCS system via the board card, wherein the response frequency of the displacement sensor is 1-300Hz, the sampling rate is ≥800Hz / s, the measurement sensitivity of the displacement sensor is ≥30mV / g, and it can withstand a temperature of 80°C.

[0047] 2) Obtain the EH oil pressure information in the EH oil pipeline through the oil pressure sensor;

[0048] 3) judging whether the servo valve on the EH oil pipeline is operating normally according to the vibration information of the EH oil pipeline and the EH oil pressure information;

[0049] When the EH oil pressure is greater than the preset oil pressure, and the vibration amplitude of the EH oil pipeline is greater than or equal to the preset amplitude, it means that the EH oil is blocked in the EH oil pipeline and cannot flow normally. It can be preliminarily determined that the servo valve at the corresponding position is stuck, and the faulty servo valve should be repaired or replaced. After the servo valve is replaced, when the drop in EH oil pressure is greater than or equal to the preset amplitude, and the vibration amplitude of the EH oil pipeline is less than or equal to the preset amplitude, it proves that the servo valve is indeed faulty. Otherwise, an alarm signal is generated and sent to the staff to inform the staff to conduct further inspection.

[0050] It should be noted that the present invention can effectively realize online monitoring of the working status of the EH oil pipeline.

[0051] Embodiment 2

[0052] The servo valve operation status monitoring system integrating EH oil pipeline vibration parameters of the present invention comprises:

[0053] A first acquisition module is used to acquire vibration information of the EH oil pipeline;

[0054] A second acquisition module is used to acquire EH oil pressure information in the EH oil pipeline;

[0055] The judgment module is used to judge whether the servo valve on the EH oil pipeline is operating normally according to the vibration information of the EH oil pipeline and the EH oil pressure information.

[0056] As an implementation mode of the present invention, a vibration sensor is arranged on the EH oil pipeline, and vibration information of the EH oil pipeline is acquired through the vibration sensor.

[0057] As an implementation mode of the present invention, the process of judging whether the servo valve on the EH oil pipeline is operating normally according to the vibration information and the EH oil pressure information of the EH oil pipeline is as follows:

[0058] When the EH oil pressure in the EH oil pipeline is greater than the preset oil pressure, and the vibration amplitude of the EH oil pipeline is greater than or equal to the preset amplitude, it means that the EH oil is blocked in the EH oil pipeline and cannot flow normally, and the servo valve on the EH oil pipeline is stuck.

[0059] As an embodiment of the present invention, it also includes:

[0060] The replacement module is used to repair or replace a faulty servo valve. After the servo valve is replaced, when the drop in EH oil pressure in the EH oil pipeline is greater than or equal to a preset amplitude, and the vibration amplitude of the EH oil pipeline is less than or equal to a preset amplitude, it proves that the servo valve is indeed faulty. Otherwise, an alarm signal is generated.

[0061] The division of modules in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present application may be integrated into a processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0062] Embodiment 3

[0063] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the servo valve operation status monitoring method integrating EH oil pipeline vibration parameters are implemented, for example, comprising: obtaining vibration information of the EH oil pipeline; obtaining EH oil pressure information in the EH oil pipeline; judging whether the servo valve on the EH oil pipeline is operating normally according to the vibration information and EH oil pressure information of the EH oil pipeline; repairing or replacing the faulty servo valve, wherein after the servo valve is replaced, when the drop amplitude of the EH oil pressure of the EH oil pipeline is greater than or equal to a preset amplitude, and the vibration amplitude of the EH oil pipeline is less than or equal to a preset amplitude, it is proved that the servo valve is indeed faulty, otherwise, an alarm signal is generated. The memory may include a memory, such as a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk memory, etc. The processor, network interface, and memory are interconnected through an internal bus, and the internal bus may be an industrial standard architecture bus, a peripheral component interconnection standard bus, an extended industrial standard architecture bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs. Specifically, the program may include a program code, and the program code includes computer operation instructions. The memory may include a memory and a non-volatile memory, and provide instructions and data to the processor.

[0064] Embodiment 4

[0065] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the servo valve operation status monitoring method integrating the vibration parameters of the EH oil pipeline are implemented, for example, including: obtaining vibration information of the EH oil pipeline; obtaining EH oil pressure information in the EH oil pipeline; judging whether the servo valve on the EH oil pipeline is operating normally according to the vibration information and EH oil pressure information of the EH oil pipeline; repairing or replacing the faulty servo valve, wherein, after the servo valve is replaced, when the drop amplitude of the EH oil pressure of the EH oil pipeline is greater than or equal to the preset amplitude, and the vibration amplitude of the EH oil pipeline is less than or equal to the preset amplitude, it is proved that the servo valve is indeed faulty, otherwise, an alarm signal is generated. Specifically, the computer-readable storage medium includes, but is not limited to, for example, volatile memory and / or non-volatile memory. The volatile memory may include random access memory (RAM) and / or cache memory (cache), etc. The non-volatile memory may include read-only memory (ROM), hard disk, flash memory, optical disk, magnetic disk, etc.

[0066] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0067] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0068] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1A function specified in one or more boxes.

[0069] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0070] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention is indicated by the following claims.

[0071] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0072] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A servo valve operation status monitoring method integrating EH oil pipeline vibration parameters, characterized in that: include: Obtain vibration information of EH oil pipeline; Obtain EH oil pressure information in the EH oil pipeline; Whether the servo valve on the EH oil pipeline operates normally is determined according to the vibration information of the EH oil pipeline and the EH oil pressure information.

2. The servo valve operation status monitoring method integrating EH oil pipeline vibration parameters according to claim 1 is characterized in that: A vibration sensor is arranged on the EH oil pipeline, and vibration information of the EH oil pipeline is obtained through the vibration sensor.

3. The servo valve operation status monitoring method integrating EH oil pipeline vibration parameters according to claim 1 is characterized in that: The process of judging whether the servo valve on the EH oil pipeline is operating normally according to the vibration information of the EH oil pipeline and the EH oil pressure information is as follows: When the EH oil pressure in the EH oil pipeline is greater than the preset oil pressure, and the vibration amplitude of the EH oil pipeline is greater than or equal to the preset amplitude, it means that the EH oil is blocked in the EH oil pipeline and cannot flow normally, and the servo valve on the EH oil pipeline is stuck.

4. The servo valve operation status monitoring method integrating EH oil pipeline vibration parameters according to claim 1 is characterized in that: Also includes: The faulty servo valve is repaired or replaced. After the servo valve is replaced, when the drop amplitude of the EH oil pressure of the EH oil pipeline is greater than or equal to the preset amplitude, and the vibration amplitude of the EH oil pipeline is less than or equal to the preset amplitude, it proves that the servo valve is indeed faulty. Otherwise, an alarm signal is generated.

5. A servo valve operation status monitoring system integrating EH oil pipeline vibration parameters, characterized in that: include: A first acquisition module is used to acquire vibration information of the EH oil pipeline; A second acquisition module is used to acquire EH oil pressure information in the EH oil pipeline; The judgment module is used to judge whether the servo valve on the EH oil pipeline is operating normally according to the vibration information of the EH oil pipeline and the EH oil pressure information.

6. The servo valve operation status monitoring system integrating EH oil pipeline vibration parameters according to claim 5 is characterized in that: A vibration sensor is arranged on the EH oil pipeline, and vibration information of the EH oil pipeline is obtained through the vibration sensor.

7. The servo valve operation status monitoring system integrating EH oil pipeline vibration parameters according to claim 5 is characterized in that: The process of judging whether the servo valve on the EH oil pipeline is operating normally according to the vibration information of the EH oil pipeline and the EH oil pressure information is as follows: When the EH oil pressure in the EH oil pipeline is greater than the preset oil pressure, and the vibration amplitude of the EH oil pipeline is greater than or equal to the preset amplitude, it means that the EH oil is blocked in the EH oil pipeline and cannot flow normally, and the servo valve on the EH oil pipeline is stuck.

8. The servo valve operation status monitoring system integrating EH oil pipeline vibration parameters according to claim 5 is characterized in that: Also includes: The replacement module is used to repair or replace a faulty servo valve. After the servo valve is replaced, when the drop in EH oil pressure in the EH oil pipeline is greater than or equal to a preset amplitude, and the vibration amplitude of the EH oil pipeline is less than or equal to a preset amplitude, it proves that the servo valve is indeed faulty. Otherwise, an alarm signal is generated.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the servo valve operation status monitoring method integrating EH oil pipeline vibration parameters as described in any one of claims 1 to 4 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the servo valve operation status monitoring method integrating EH oil pipeline vibration parameters as described in any one of claims 1 to 4 are implemented.

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