Operation monitoring system of liquid-driven hydrogen compressor

Abstract

The utility model discloses an operation monitoring system of a liquid-driven hydrogen compressor, which comprises a plurality of groups of vibration detection components, temperature sensors, pressure sensors and a main control module, the vibration detection components are respectively arranged on a compressor shell at corresponding positions of a hydraulic pump, a valve, a piston and a crankshaft, and are used for collecting vibration signals; the temperature sensors are respectively arranged on a hydrogen inlet / outlet, an intercooler inlet / outlet, a hydraulic oil tank and a compressor shell and are used for collecting temperature; the pressure sensors are installed on a hydrogen inlet and outlet, a hydraulic pump outlet and all stages of hydraulic cavities respectively and used for collecting pressure values. The master control module is provided with an SIM card, and the collected vibration signals, temperature and pressure values can be transmitted to a cloud platform of the Internet of Things. The processing of signals collected by the vibration detection assembly is combined with the temperature and pressure sensors obtained in the process of the hydrogen refueling station, and the reliability and the accuracy of the vibration monitoring system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to an operation monitoring system for a liquid-driven hydrogen compressor. Background Art

[0002] The hydrogen compressor is one of the three core pieces of equipment in a hydrogen refueling station. Its performance directly impacts the station's operating efficiency, and its reliability and safety are crucial to its safe operation. Therefore, if preventive maintenance can be used to detect abnormalities in compressor operation early, allowing for timely preventive maintenance and servicing, it will help reduce sudden failures and unplanned downtime, improving equipment reliability and stability. Furthermore, compressor failures can pose safety hazards such as hydrogen leaks and explosions. By monitoring the compressor's operating status, potential safety risks can be identified promptly, allowing necessary measures to ensure the safety of the hydrogen refueling station.

[0003] Currently, diaphragm compressors are commonly used in hydrogen refueling stations. However, they have significant disadvantages. Frequent starts and stops have a significant impact on the compressor's lifespan. In addition, the disc-shaped working chamber of a diaphragm compressor has a very small volume, making it difficult for a single unit to achieve a large processing capacity.

[0004] In actual use, compressors need to be started and stopped frequently every day, and the hydrogen refueling capacity of newly built hydrogen refueling stations is increasing. Therefore, liquid-driven compressors have better application prospects in the future due to their advantages such as large exhaust volume, no impact on service life due to frequent start-stop under load, suitability for variable pressure conditions, and lower overall maintenance costs. Utility Model Content

[0005] In order to solve the above problems, the utility model provides an operation monitoring system for a liquid-driven hydrogen compressor, which can monitor the operating status of the liquid-driven hydrogen compressor, predict possible failures and perform pre-emptive maintenance, thereby increasing the service life of the compressor.

[0006] To this end, the technical solution of the present invention is: an operation monitoring system for a liquid-driven hydrogen compressor, comprising multiple groups of vibration detection components, temperature sensors, pressure sensors and a main control module. The vibration detection components are respectively installed on the compressor casing at the corresponding positions of the hydraulic pump, valve, piston and crankshaft, and are used to collect vibration signals and send them to the main control module; the temperature sensors are respectively installed on the hydrogen inlet and outlet, the intercooler inlet and outlet, the hydraulic oil tank and the compressor casing, and are used to collect temperatures and send them to the main control module; the pressure sensors are respectively installed on the hydrogen inlet and outlet, the hydraulic pump outlet and the hydraulic chambers at all levels, and are used to collect pressure values and send them to the main control module;

[0007] The main control module is equipped with a SIM card, which can transmit the collected vibration signals, temperature and pressure values to the Internet of Things cloud platform;

[0008] The Internet of Things cloud platform is provided with a storage module and an identification module, and the identification module obtains the working status of the compressor based on the data collected in real time.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the Internet of Things cloud platform receives and stores the collected vibration signals, temperature, and pressure values in real time, and analyzes these real-time collected data to obtain the working status of the compressor and determine whether maintenance is needed in advance.

[0010] On the basis of the above solution and as a preferred solution of the above solution: the vibration detection component includes a shell, in which an acceleration sensor and a battery are arranged, the acceleration sensor is used to collect vibration signals, and the battery is used to power the acceleration sensor.

[0011] On the basis of the above solution and as a preferred solution of the above solution: a resonance adjustment block is further provided in the shell, and the resonance adjustment block is used to reduce the resonance of the vibration detection component; the resonance adjustment block is made of stainless steel.

[0012] On the basis of the above solution and as a preferred solution of the above solution: a magnetic attraction portion is provided on the outer side of the shell, which is fixed to the compressor shell by magnetic attraction.

[0013] On the basis of the above solution and as a preferred solution of the above solution: the vibration detection component collects frequencies in no less than 2 ranges.

[0014] On the basis of the above scheme and as a preferred scheme of the above scheme: the vibration detection component collects frequency ranges including: 0.1Hz~100Hz, 1Hz~1kHz, 1kHz~1MHz, which monitors low-frequency vibration, medium-frequency vibration and high-frequency vibration respectively.

[0015] When using:

[0016] 1) Install the temperature sensors on the hydrogen inlet and outlet, the intercooler inlet and outlet, the hydraulic oil tank and the compressor casing respectively; and install the pressure sensors on the hydrogen inlet and outlet, the hydraulic pump outlet and the hydraulic chambers at all levels respectively;

[0017] 2) Install a medium frequency vibration detection component to perform pre-monitoring and collect pre-monitored vibration signals;

[0018] 3) Based on the vibration signals collected at different monitoring locations, choose to install vibration detection components with low frequency, medium frequency or high frequency vibration.

[0019] Set the vibration detection component to work in conjunction with the compressor, that is, start the vibration detection component 1 second before the compressor is turned on, and turn off the vibration detection component 1 minute after the compressor is turned off; during operation, collect vibration data every 5 to 60 minutes.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The vibration detection component processes signals collected by the system, combined with temperature and pressure sensors acquired during the hydrogenation station's operation, to improve the reliability and accuracy of the vibration monitoring system. The component collects real-time vibration signals from power components such as hydraulic pumps, valves, pistons, and crankshafts, and transmits them to the IoT cloud platform. The platform remotely processes the signals and uses algorithms to predict potential failures and perform proactive maintenance, thereby increasing the compressor's service life and the reliability and safety of hydrogenation station operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural block diagram of the utility model;

[0023] Figure 2 This is a schematic structural diagram of the vibration detection assembly of the utility model;

[0024] Figure 3 This is an exploded view of the parts of the vibration detection component of the utility model.

[0025] Components marked in the figure are: vibration detection component 1, housing 11, acceleration sensor 12, battery module 13, magnetic attraction part 14, and resonance adjustment block 15. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, the terms "first" and "second" may explicitly or implicitly refer to one or more of these features. In the description of this utility model, "several" and "a number" mean two or more, unless otherwise specifically defined.

[0028] See the accompanying drawings. The operation monitoring system of the liquid-driven hydrogen compressor described in this embodiment includes multiple groups of vibration detection components 1, temperature sensors, pressure sensors and a main control module.

[0029] The vibration detection assembly 1 is located on the compressor housing corresponding to the moving parts such as the hydraulic pump, valve, piston, and crankshaft, and is used to collect vibration signals and send them to the main control module. The vibration detection assembly 1 includes a housing 11, which contains an acceleration sensor 12 and a battery module 13. The acceleration sensor 12 is used to collect vibration signals, and the battery module 13 is used to power the acceleration sensor. A magnetic attraction portion 14 is provided on the outside of the housing 11, which can be fixed to the compressor housing by magnetic attraction and can be installed and removed separately without the need for drilling holes on the compressor housing.

[0030] A resonance adjustment block 15 is also provided within the housing 11. The material of the resonance adjustment block 15 may be stainless steel to prevent resonance between the vibration sensor and the compressor. Similarly, shock-absorbing devices, such as shock pads and vibration-absorbing feet, are installed around the hydraulic compressor to reduce the impact of external vibrations on the system.

[0031] The vibration detection component collects at least two frequency ranges: 0.1Hz to 100Hz for monitoring low-frequency vibrations; 1Hz to 1kHz for monitoring medium-frequency vibrations; and 1kHz-1MHz for monitoring high-frequency vibrations. The vibration detection component with the appropriate frequency can be selected based on the vibration range of the monitored area to ensure accurate vibration signal acquisition.

[0032] The temperature sensors are located at the hydrogen inlet and outlet, intercooler inlet and outlet, hydraulic oil tank, compressor housing, etc., for collecting temperature and sending it to the main control module. The pressure sensors are located at the hydrogen inlet and outlet, hydraulic pump outlet, and hydraulic chambers of each level, etc., for collecting pressure values and sending them to the main control module.

[0033] The main control module is equipped with a SIM card that transmits collected vibration signals, temperature, and pressure values to an IoT cloud platform. The IoT cloud platform records sensor information and processes the vibration signals using algorithms to determine the compressor's operating status and whether maintenance is required.

[0034] There are various choices of algorithms, for example:

[0035] Method 1: The IoT cloud platform is used to acquire and store vibration signals, temperature, and pressure values in real time. The recognition module can compare the real-time collected data with preset thresholds. If any vibration signal, temperature, or pressure value exceeds the preset threshold, an error is immediately reported and relevant personnel are notified to check, thereby identifying potential safety risks early.

[0036] Method 2: The recognition module within the IoT cloud platform calculates power spectrum characteristics, such as frequency, amplitude, and phase, for identification. This allows for accurate identification of the compressor's operating status and timely maintenance. The calculation method for power spectrum characteristics is a mature technology and will not be further elaborated here.

[0037] Method 3: The recognition module within the IoT cloud platform can use deep convolutional neural networks to perform deep learning on vibration sounds, thereby identifying abnormal sound patterns, understanding the compressor's operating status, and performing timely maintenance. Deep convolutional neural networks are mature technology and will not be further described here.

[0038] The method for using the above-mentioned operation monitoring system includes the following steps:

[0039] 1) Install the temperature sensors on the hydrogen inlet and outlet, the intercooler inlet and outlet, the hydraulic oil tank and the compressor casing respectively; and install the pressure sensors on the hydrogen inlet and outlet, the hydraulic pump outlet and the hydraulic chambers at all levels respectively.

[0040] 2) Install a medium-frequency vibration detection component to perform pre-monitoring and collect the pre-monitoring vibration signal.

[0041] 3) Based on the vibration signals collected at different monitoring locations, choose to install a vibration detection component with low, medium or high frequency vibration; to save battery energy, set the vibration detection component to work in conjunction with the compressor, that is, before the compressor is turned on, start the vibration detection component 1 second in advance, and turn off the vibration detection component 1 minute after the compressor is turned off; during operation, collect vibration data every 5 to 60 minutes.

[0042] The processing of the collected signals of the vibration sensor of this embodiment is combined with the temperature and pressure sensors obtained in the process of the hydrogenation station to improve the reliability and accuracy of the vibration monitoring system.

[0043] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An operation monitoring system for a liquid-driven hydrogen compressor, characterized in that: It includes multiple groups of vibration detection components, temperature sensors, pressure sensors and a main control module. The vibration detection components are respectively installed on the hydraulic pump, valve, piston, and compressor housing at corresponding positions of the crankshaft to collect vibration signals and send them to the main control module; the temperature sensors are respectively installed on the hydrogen inlet and outlet, the intercooler inlet and outlet, the hydraulic oil tank and the compressor housing to collect temperatures and send them to the main control module; the pressure sensors are respectively installed on the hydrogen inlet and outlet, the hydraulic pump outlet, and the hydraulic chambers at all levels to collect pressure values and send them to the main control module; The main control module is equipped with a SIM card, which can transmit the collected vibration signals, temperature and pressure values to the Internet of Things cloud platform; The Internet of Things cloud platform is provided with a storage module and an identification module, and the identification module obtains the working status of the compressor based on the data collected in real time.

2. The operation monitoring system of a liquid-driven hydrogen compressor according to claim 1, characterized in that: The IoT cloud platform receives and stores the collected vibration signals, temperature, and pressure values in real time, analyzes these real-time collected data, obtains the working status of the compressor, and determines whether maintenance is required in advance.

3. The operation monitoring system of a liquid-driven hydrogen compressor according to claim 1, characterized in that: The vibration detection component includes a shell, in which an acceleration sensor and a battery are arranged. The acceleration sensor is used to collect vibration signals, and the battery is used to supply power to the acceleration sensor.

4. The operation monitoring system of a liquid-driven hydrogen compressor according to claim 3, characterized in that: A resonance adjustment block is also provided in the shell, and the resonance adjustment block is used to reduce the resonance of the vibration detection component; the resonance adjustment block is made of stainless steel.

5. The operation monitoring system for a liquid-driven hydrogen compressor according to claim 3, characterized in that: A magnetic attraction portion is provided on the outer side of the shell and is fixed to the compressor shell by magnetic attraction.

6. The operation monitoring system for a liquid-driven hydrogen compressor according to claim 1, characterized in that: The vibration detection component collects frequencies in at least two ranges.

7. The operation monitoring system for a liquid-driven hydrogen compressor according to claim 6, characterized in that: The vibration detection component collects frequencies in the range of 0.1 Hz to 100 Hz, 1 Hz to 1 kHz, and 1 kHz to 1 MHz, respectively monitoring low-frequency vibration, medium-frequency vibration, and high-frequency vibration.

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