A high-speed reciprocating compressor control method and system

Abstract

The present invention discloses a high-speed reciprocating compressor control method and system, which belongs to the field of compressor control technology and is used to solve the following technical problems: the existing technology cannot accurately and comprehensively control the operation process of the reciprocating compressor, and cannot comprehensively guarantee the smooth operation of the compressor. The method includes: based on the gas pressure inside the compressor, controlling the start-up of the compressor; detecting the start-up state of the compressor, and starting the pre-lubricating oil pump of the compressor after the detection meets the standard; after the compressor reaches the preset oil supply condition, turning off the pre-lubricating oil pump; loading control of the compressor according to the lubricating oil temperature and intake pressure in the compressor; during the operation of the compressor, identifying the degree of abnormal operation according to the degree to which various operating parameters deviate from the normal value; after the operating state of the compressor reaches the shutdown condition, the compressor is controlled to shut down. Effectively control the start-up and shutdown process of the compressor unit, and monitor the operating status of each component of the unit.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor control, and in particular to a high-speed reciprocating compressor control method and system. Background Art

[0002] A reciprocating compressor is a type of compressor that uses the reciprocating motion of the piston or diaphragm in the cylinder to change the cylinder volume periodically and realize the pressurization and transportation of the gas. It is a positive displacement compressor. The principle is that the crankshaft drives the connecting rod, the connecting rod drives the piston, and the piston moves up and down. The movement of the piston causes the volume in the cylinder to change. When the piston moves downward, the cylinder volume increases, the intake valve opens, the exhaust valve closes, and the air is sucked in to complete the intake process; when the piston moves upward, the cylinder volume decreases, the outlet valve opens, and the intake valve closes to complete the compression process. Usually, there are piston rings on the piston to seal the gap between the cylinder and the piston, and there is lubricating oil in the cylinder to lubricate the piston ring. At present, reciprocating compressors are widely used in the fields of oil, natural gas, etc.

[0003] The control system of a reciprocating compressor is the key core to ensure the safe and stable operation of the compressor, and it is also the brain of the compressor operation. During the operation of the compressor, it is necessary to ensure that the status of each instrument and the collected data are normal; the main bearings, crossheads and connecting rods of the compressor must be repeatedly lubricated before starting to ensure that the bearings of the compressor are not worn; the power of the process gas cooler needs to be adjusted according to the compressor load and ambient temperature to ensure the stability of the compressor inlet and outlet temperatures; during the operation of the compressor, it is necessary to check the liquid level in the intake scrubber, the compressor bearing temperature, the compressor exhaust temperature, the compressor exhaust pressure, the lubricating oil temperature and the operating status of the main motor.

[0004] The above-listed control of the operating status of each compressor component plays an important role in the smooth operation of the reciprocating compressor, but the existing technology cannot achieve accurate and comprehensive control of the operating process of the reciprocating compressor, and cannot fully guarantee the smooth operation of the compressor. Summary of the invention

[0005] The embodiments of the present invention provide a high-speed reciprocating compressor control method and system for solving the following technical problems: the prior art cannot accurately and comprehensively control the operation process of the reciprocating compressor, and cannot comprehensively guarantee the smooth operation of the compressor.

[0006] The embodiment of the present invention adopts the following technical solutions:

[0007] On the one hand, an embodiment of the present invention provides a high-speed reciprocating compressor control method, the method comprising: based on the gas pressure inside the compressor, performing a start-up control on the compressor;

[0008] Performing a startup state detection on the compressor and starting a pre-lubricating oil pump of the compressor after the detection meets the standard specifically includes:

[0009] Obtaining the lubricating oil temperature of the compressor by means of a lubricating oil temperature detector installed in the oil circuit of the compressor;

[0010] The valve position of each automatic valve in the compressor is obtained by a valve group state detector installed on the compressor valve group;

[0011] If the lubricating oil temperature is within the first preset oil temperature range and the valve positions of all automatic valves are in the correct positions, the start-up state detection meets the standard, and the pre-lubricating oil pump of the compressor is started to allow the lubricating oil to enter the crankshaft bearing and the connecting rod bearing;

[0012] After starting the pre-lubricating oil pump, start the auxiliary equipment of the compressor in sequence; wherein the auxiliary equipment at least includes: a main motor cooling fan, an air cooler, a cooling water pump and a main lubricating oil pump;

[0013] After the compressor reaches a preset oil supply condition, shutting down the pre-lubricating oil pump;

[0014] Performing load control on the compressor according to the lubricating oil temperature and intake pressure in the compressor;

[0015] During the operation of the compressor, the degree of abnormal operation is identified according to the degree to which various operating parameters deviate from normal values;

[0016] After the compressor reaches a shutdown condition, the compressor is shut down.

[0017] In a feasible implementation manner, starting control of the compressor is performed based on the gas pressure inside the compressor, specifically including:

[0018] Obtaining the gas pressure inside the compressor through a pressure sensor installed in the compressor cylinder;

[0019] It is determined whether the gas pressure is within a preset pressure range, and if so, the compressor is started up.

[0020] In a feasible implementation manner, after the compressor reaches a preset oil supply condition, the pre-lubricating oil pump is turned off, specifically including:

[0021] Obtaining the motor speed of the compressor;

[0022] Obtaining the lubricating oil pressure of the compressor by means of an oil pressure detector installed in the oil circuit of the compressor;

[0023] After the motor speed reaches a preset speed and the lubricating oil pressure reaches a preset oil pressure threshold, turning off the pre-lubricating oil pump;

[0024] If the motor speed reaches the preset speed but the lubricating oil pressure does not reach the preset oil pressure threshold, it is considered that the lubricating oil system fails, triggering a shutdown inspection.

[0025] In a feasible implementation manner, the compressor is loaded and controlled according to the lubricating oil temperature and the intake pressure in the compressor, specifically including:

[0026] Obtaining the lubricating oil temperature of the compressor by means of a lubricating oil temperature detector;

[0027] After the lubricating oil temperature reaches a second preset oil temperature range, starting a loading program; wherein the loading program includes a manual loading program and an automatic loading program;

[0028] When the selected loading program is an automatic loading program, the motor speed of the compressor is automatically adjusted according to the intake pressure collected by the pressure sensor until the gas flow meets the on-site demand;

[0029] If adjusting the motor speed cannot make the gas flow meet the on-site demand, the reflux valve opening will continue to be automatically adjusted until the gas flow meets the on-site demand.

[0030] In a feasible implementation manner, during the operation of the compressor, the degree of abnormal operation is identified according to the degree to which various operating parameters deviate from normal values, specifically including:

[0031] Various operating parameters of the compressor are obtained in real time through parameter detectors installed in various components of the compressor; wherein the various operating parameters at least include: lubricating oil temperature, lubricating oil pressure, natural gas temperature and pressure, scrubber liquid level, filter pressure difference, bearing temperature, motor rotor temperature, motor stator temperature, compressor vibration value and motor vibration value;

[0032] If any of the operating parameters is not within the normal range, it is determined that the compressor is operating abnormally and a warning message is sent;

[0033] The degree of abnormal operation of the compressor is determined according to the difference between the operating parameter that is not within the normal range and the normal value.

[0034] In a feasible implementation manner, after the compressor reaches the shutdown condition, controlling the compressor to shut down the unit specifically includes:

[0035] When receiving a normal shutdown instruction, controlling the compressor to perform a normal shutdown;

[0036] When no normal shutdown instruction is received but the operation abnormality of the compressor exceeds a preset abnormality threshold, the compressor is controlled to perform a fault shutdown or an emergency shutdown.

[0037] In a feasible implementation manner, upon receiving a normal shutdown instruction, controlling the compressor to perform a normal shutdown specifically includes:

[0038] When a normal shutdown command is received, the compressor is controlled to perform a slow unloading operation at a preset unloading speed to avoid flow fluctuations.

[0039] In a feasible implementation manner, when no normal shutdown instruction is received but the operation abnormality of the compressor exceeds a preset abnormality threshold, the compressor is controlled to perform a fault shutdown or an emergency shutdown, specifically including:

[0040] During the operation of the compressor, if the degree of abnormal operation exceeds a first preset abnormal degree threshold, a compressor abnormality alarm is issued;

[0041] If the degree of abnormal operation exceeds a second preset abnormal degree threshold, the host of the compressor is controlled to shut down immediately, and the pre-lubricating oil pump of the compressor is started at the same time, until the host completely stops running, thereby achieving fault shutdown;

[0042] If the degree of the abnormal operation exceeds the fault threshold, the host and auxiliary equipment of the compressor are immediately powered off to achieve emergency shutdown;

[0043] Among them, the first preset abnormality level threshold < the second preset abnormality level threshold < the fault threshold.

[0044] On the other hand, an embodiment of the present invention further provides a high-speed reciprocating compressor control system, the system comprising:

[0045] The compressor start-up self-check and start-up process control module is used to control the start-up of the compressor based on the gas pressure inside the compressor; detect the start-up state of the compressor and start the pre-lubricating oil pump of the compressor after the detection meets the standard; turn off the pre-lubricating oil pump after the compressor reaches the preset oil supply condition; and load control the compressor according to the lubricating oil temperature and intake pressure in the compressor;

[0046] The compressor operation status inspection and control module is used to identify the degree of abnormal operation according to the degree to which various operating parameters deviate from normal values ​​during the operation of the compressor;

[0047] The compressor shutdown process control module is used to control the shutdown of the compressor after the operating state of the compressor reaches the shutdown condition.

[0048] Compared with the prior art, the high-speed reciprocating compressor control method and system provided by the embodiment of the present invention have the following beneficial effects:

[0049] The compressor control method and system provided by the present invention can effectively control the start and stop process of the compressor unit, monitor the operating status of each component of the unit at all times, and accurately and comprehensively control the operating process of the reciprocating compressor. It can also detect the fault of the unit in time according to the operating status, and judge the severity of the fault to promptly remind the operator to intervene, so as to ensure the safe and stable operation of the high-speed reciprocating compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0051] Figure 1 A flow chart of a high-speed reciprocating compressor control method provided by an embodiment of the present invention;

[0052] Figure 2 A schematic diagram of a detector installed in a compressor unit provided by an embodiment of the present invention;

[0053] Figure 3 A schematic diagram of a control process of a high-speed reciprocating compressor control system provided by an embodiment of the present invention;

[0054] Figure 4 A schematic structural diagram of a high-speed reciprocating compressor control system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0055] In order to enable those skilled in the art to better understand the technical solutions in the present invention, 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 only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0056] The embodiment of the present invention provides a high-speed reciprocating compressor control method, such as Figure 1 As shown, the high-speed reciprocating compressor control method specifically includes steps S101-S106:

[0057] S101. Based on the gas pressure inside the compressor, start-up control of the compressor is performed.

[0058] First, as a feasible implementation method, Figure 2 A schematic diagram of a detector installed in a compressor unit provided by an embodiment of the present invention, such as Figure 2 As shown, the present invention sets detectors at multiple setting positions of a high-speed reciprocating compressor (hereinafter referred to as compressor) to detect various operating parameters:

[0059] A pressure detector is provided in the compressor cylinder;

[0060] A valve group state detector is provided on the valve group;

[0061] A lubricating oil temperature detector and an oil pressure detector are arranged on the compressor oil circuit to detect the lubricating oil temperature and oil pressure of the lubricating oil;

[0062] Install a natural gas temperature detector at the compressor exhaust port;

[0063] Pressure detectors are provided at the inlet and outlet of the filter;

[0064] Temperature detectors are installed on the compressor bearings, motor rotors, and motor stators;

[0065] Vibration detectors are provided on both the compressor main engine and the drive motor;

[0066] The values ​​detected by the above-mentioned various detectors are fed back to the high-speed reciprocating compressor control system provided by the present invention, and the high-speed reciprocating compressor control system automatically controls the compressor according to a set preset program.

[0067] Further, Figure 3 A control process diagram of a high-speed reciprocating compressor control system provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown, the control system first obtains the gas pressure inside the compressor through the pressure sensor installed in the compressor cylinder, and then determines whether the gas pressure is within the preset pressure range. If so, the compressor is started.

[0068] As a feasible implementation method, the compressor first determines whether the gas pressure in the compressor meets the requirements before starting, that is, the preset pressure range before starting the compressor is set in the system in advance. This is to avoid the pressure being too low, and the compressor intake system being evacuated to negative pressure after starting, which causes air to enter the compressor and cause medium contamination, and causes impurities in the air to enter the rotating parts of the compressor and cause abnormal wear. At the same time, it can avoid the gas pressure in the unit being too high, resulting in excessive current in the starting motor. It can ensure the safe starting of high-speed reciprocating compressors.

[0069] In one example, the unit can only be started if the gas pressure is set to be within a pressure range below 0.3 MPa. If it is not within this pressure range, the unit is not allowed to be started.

[0070] S102, performing a startup status test on the compressor, and starting a pre-lubricating oil pump of the compressor after the test meets the standards.

[0071] Specifically, Figure 3 As shown, after the gas pressure in the compressor unit meets the requirement, the lubricating oil temperature of the compressor is obtained through the lubricating oil temperature detector installed in the compressor oil circuit. The valve position of each automatic valve in the compressor is obtained through the valve group state detector installed on the compressor valve group.

[0072] Furthermore, if the lubricating oil temperature is within the first preset oil temperature range and the valve positions of all automatic valves are in the correct position, the start-up state detection meets the standard. At this time, three conditions are met: the gas pressure in the compressor unit meets the requirements, the lubricating oil temperature is within the required range, and the valve positions of the automatic valves are in the correct position. At this time, the pre-lubricating oil pump of the compressor is started to allow the lubricating oil to enter the crankshaft bearing and the connecting rod bearing.

[0073] As a feasible implementation method, after the compressor is started, the lubricating oil temperature is detected in real time by a lubricating oil temperature detector to ensure that the temperature of the lubricating oil is within the allowable range, so as to ensure that the sliding bearing of the compressor is well lubricated. At the same time, the valve group state detector installed at each automatic valve is used to detect whether the valve position of each automatic valve is in the correct position. After all tests are up to standard, the system starts the pre-lubricating oil pump to allow the lubricating oil to enter the crankshaft bearing and connecting rod bearing to avoid wear of components caused by friction between the crankshaft bearing and the connecting rod bearing in the initial stage of starting.

[0074] In one example, the lubricating oil temperature is required to be 20-25°C, then the lubricating oil temperature needs to be within this range.

[0075] Furthermore, if Figure 3 As shown, after the pre-lubricating oil pump is started, the main motor is started, and the auxiliary equipment of the compressor is started in sequence; wherein the auxiliary equipment at least includes: a main motor cooling fan, an air cooler, a cooling water pump and a main lubricating oil pump.

[0076] S103: After the compressor reaches a preset oil supply condition, the pre-lubrication oil pump is turned off.

[0077] Specifically, Figure 3 As shown, after the main motor and auxiliary equipment are started, the motor speed of the compressor is obtained. The lubricating oil pressure of the compressor is obtained through the oil pressure detector installed in the oil circuit of the compressor.

[0078] Further, after the motor speed reaches a preset speed and the lubricating oil pressure reaches a preset oil pressure threshold, the warm-up is completed and the pre-lubricating oil pump is turned off.

[0079] In one example, when the motor speed of the compressor reaches 600 r / min and the oil pressure of the lubricating oil is detected to be above 0.4 MPa, the main lubricating oil pump of the compressor is able to supply oil normally, and the pre-lubricating oil pump is turned off.

[0080] Furthermore, if the motor speed reaches a preset speed but the lubricating oil pressure does not reach a preset oil pressure threshold, it is considered that the lubricating oil system is faulty, triggering a shutdown inspection.

[0081] S104: Load control is performed on the compressor according to the lubricating oil temperature and intake pressure in the compressor.

[0082] Specifically, Figure 3 As shown, the lubricating oil temperature of the compressor is obtained through a lubricating oil temperature detector. After the lubricating oil temperature reaches the second preset oil temperature range, the loading program is started to load the unit. Among them, the loading program includes a manual loading program and an automatic loading program.

[0083] Furthermore, when the selected loading program is an automatic loading program, the motor speed of the compressor is automatically adjusted according to the intake pressure collected by the pressure sensor until the gas flow meets the on-site demand. If the motor speed adjustment cannot make the gas flow meet the on-site demand, the reflux valve opening is automatically adjusted until the gas flow meets the on-site demand.

[0084] As a feasible implementation method, after the compressor is started, it will always be in a low-speed no-load state. Due to the heat generated by the friction of the bearing, the temperature of the lubricating oil will gradually rise. After rising to a certain temperature, such as 30°C, the heat engine is completed, and the compressor can be loaded and the speed can be increased. If automatic loading is selected, the motor speed and the opening of the return valve are automatically adjusted according to the intake pressure of the compressor. In order to save electricity, the present invention first adjusts the speed of the motor, and when the speed adjustment cannot meet the gas flow requirement, the gas flow is adjusted by adjusting the return valve.

[0085] In one embodiment, assuming that the set point of the speed regulation is 1MPag, the pressure setting value of the reflux regulation should be slightly lower than 1MPag, and can be considered as 0.95MPag. When the intake pressure is higher than 1MPag, the speed of the unit increases, and when the intake pressure is lower than 1MPag, the speed of the unit will automatically decrease; if the speed of the unit has been adjusted to the minimum allowable speed, but the intake pressure of the unit is still continuously decreasing, for example, it has decreased to a value below 0.95MPag, then the reflux valve of the unit will automatically open, and the opening will be adjusted with 0.95MPag as the set value.

[0086] As a further implementation, the control system provided by the present invention also includes a manual loading mode, that is, the on-site operator adjusts the motor speed and the opening of the reflux valve on the PLC touch screen according to the actual situation on site to ensure that the gas flow meets the actual needs on site.

[0087] After the unit is loaded, the compressor's self-test and startup process control are completed.

[0088] S105. During the operation of the compressor, the degree of abnormal operation is identified according to the degree to which various operating parameters deviate from normal values.

[0089] Specifically, Figure 3 As shown, during the compressor operation status inspection and control process, firstly, various operating parameters of the compressor are obtained in real time through parameter detectors installed in various components of the compressor; wherein, various operating parameters at least include: lubricating oil temperature, lubricating oil pressure, natural gas temperature and pressure, scrubber liquid level, filter pressure difference, bearing temperature, motor rotor temperature, motor stator temperature, compressor vibration value and motor vibration value.

[0090] As a feasible implementation method, after obtaining various operating parameters, the change rate of each parameter can be continuously monitored, and possible problems can be predicted based on the change rate to provide a reference for subsequent fault judgment.

[0091] Furthermore, if any of the above operating parameters is not within the normal range, the compressor is determined to be operating abnormally and a warning message is sent. Then, based on the difference between the operating parameter that is not within the normal range and the normal value, the degree of abnormal operation of the compressor is determined, and the operator is notified to check and eliminate the fault in time, or shut down the unit to ensure that the fault does not expand.

[0092] In an example, the lubricating oil temperature needs to be below 80°C, the lubricating oil pressure needs to be below 0.4 MPa, the natural gas temperature needs to be below 150°C, the filter pressure difference needs to be below 0.1 MPa, the bearing temperature needs to be below 95°C, the motor rotor and stator temperatures need to be below 115°C, and the compressor vibration value and motor vibration value need to be below 12 mm / s.

[0093] As a feasible implementation method, under different working conditions, the judgment thresholds of various parameters can be dynamically adjusted. For example, the fault judgment thresholds after continuous high-load operation for 1 hour are higher than the corresponding thresholds under low-load working conditions.

[0094] S106: After the operating state of the compressor reaches the shutdown condition, the compressor is shut down.

[0095] Specifically, when a normal shutdown instruction is received, the compressor is controlled to perform a normal shutdown, which specifically includes:

[0096] When a normal shutdown command is received, the compressor is controlled to perform a slow unloading operation at a preset unloading speed to avoid flow fluctuations.

[0097] Furthermore, when no normal shutdown command is received but the abnormality of the compressor exceeds a preset abnormality threshold, the compressor is controlled to perform a fault shutdown or emergency shutdown, specifically including:

[0098] During the operation of the compressor, if the degree of abnormal operation exceeds a first preset abnormal degree threshold, a compressor abnormality alarm is issued;

[0099] If the degree of abnormal operation exceeds the second preset abnormal degree threshold, the host of the compressor is immediately shut down, and the pre-lubricating oil pump of the compressor is started at the same time, until the host completely stops running, thus achieving fault shutdown;

[0100] If the degree of operational abnormality exceeds the fault threshold, the host machine and auxiliary equipment controlling the compressor are immediately powered off to achieve emergency shutdown; wherein the first preset abnormality threshold < the second preset abnormality threshold < the fault threshold.

[0101] As a feasible implementation method, Figure 3 As shown, the compressor shutdown is divided into three modes, one is normal shutdown, the second is fault shutdown, and the third is emergency shutdown.

[0102] Normal shutdown: After the compressor stops running, or the unit operator shuts down the unit in a planned manner according to the actual maintenance needs or the needs of gas volume adjustment, and sends a shutdown command to the compressor. This shutdown process is a normal shutdown process. During normal shutdown, the control system first slowly unloads the compressor unit to avoid the impact of flow fluctuations on upstream and downstream equipment, and at the same time prevents the unit from crossing the resonance point with load. After unloading is completed, the power is turned off and the unit is shut down.

[0103] Fault shutdown: When the control system detects that the value of some parameters deviates from the normal value and reaches the first preset abnormality threshold, the system will alarm. When the deviation from the normal value reaches the second preset abnormality threshold, the system will control the main motor of the compressor to stop running immediately to avoid the expansion of the accident. At the same time, the pre-lubricating oil pump is started to prevent the main oil pump (shaft head pump) from pumping insufficient oil when the main motor speed drops to a lower speed, resulting in insufficient lubrication of the bearing.

[0104] In one example, if the gas pressure of the compressor exceeds the first preset abnormality threshold of 5 MPa, the system will alarm. If it exceeds the second preset abnormality threshold of MPa, the compressor unit will be controlled to shut down due to a fault.

[0105] In another example, if the lubricating oil temperature of the compressor exceeds the first preset abnormality threshold of 10°C, the system will alarm. If it exceeds the second preset abnormality threshold of 15°C, the compressor unit will be controlled to shut down due to a fault.

[0106] Furthermore, emergency shutdown: For example, when an accident occurs, for safety reasons, the main motor and auxiliary equipment will be immediately powered off, and no action will be taken after the shutdown.

[0107] It should be noted that the actual values ​​listed in the above embodiments are exemplary data and are not used to limit the various thresholds or ranges in the present invention. In practical applications, specific values ​​can be modified according to actual conditions.

[0108] In addition, the embodiment of the present invention also provides a high-speed reciprocating compressor control system, such as Figure 4 As shown, the high-speed reciprocating compressor control system 400 specifically includes:

[0109] The compressor start-up self-check and start-up process control module 410 is used to control the start-up of the compressor based on the gas pressure inside the compressor; detect the start-up state of the compressor, and start the pre-lubricating oil pump of the compressor after the detection meets the standard; turn off the pre-lubricating oil pump after the compressor reaches the preset oil supply condition; and load control the compressor according to the lubricating oil temperature and intake pressure in the compressor;

[0110] The compressor operation status inspection and control module 420 is used to identify the degree of abnormal operation according to the degree to which various operation parameters deviate from normal values ​​during the operation of the compressor;

[0111] The compressor shutdown process control module 430 is used to control the shutdown of the compressor after the operating state of the compressor reaches the shutdown condition.

[0112] As a feasible implementation, the high-speed reciprocating compressor control system 400 further includes a high-speed reciprocating compressor, a driving motor, and various parameter detectors installed in the high-speed reciprocating compressor.

[0113] Among them, the unit of the high-speed reciprocating compressor includes a compressor main unit, a drive motor, a pre-lubricating oil pump, a main lubricating oil pump and a filter.

[0114] Various parameter detectors installed in high-speed reciprocating compressors include:

[0115] A pressure detector provided in the compressor cylinder;

[0116] A valve group state detector provided on the valve group;

[0117] The lubricating oil temperature detector and the oil pressure detector provided in the compressor oil circuit are used to detect the lubricating oil temperature and oil pressure of the lubricating oil;

[0118] A natural gas temperature detector installed at the compressor exhaust port;

[0119] Pressure detectors are provided at the inlet and outlet of the filter;

[0120] Temperature detectors are provided at the bearing bushes, motor rotors and motor stators of the compressor;

[0121] Vibration detectors are installed on both the compressor main unit and the drive motor.

[0122] Each embodiment of the present invention is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0123] The above describes specific embodiments of the present invention. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or sequential order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0124] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the embodiments of the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-speed reciprocating compressor control method, characterized in that: The method comprises: Based on the gas pressure inside the compressor, starting control is performed on the compressor; Performing a startup state detection on the compressor and starting a pre-lubricating oil pump of the compressor after the detection meets the standard specifically includes: The lubricating oil temperature of the compressor is obtained by a lubricating oil temperature detector installed in the oil circuit of the compressor; the valve position of each automatic valve in the compressor is obtained by a valve group state detector installed on the valve group of the compressor; if the lubricating oil temperature is within the first preset oil temperature range and the valve positions of each automatic valve are in the correct position, the start-up state detection meets the standard, and the pre-lubricating oil pump of the compressor is started to allow the lubricating oil to enter the crankshaft bearing and the connecting rod bearing; after starting the pre-lubricating oil pump, the auxiliary equipment of the compressor is started in sequence; wherein, the auxiliary equipment at least includes: a main motor cooling fan, an air cooler, a cooling water pump and a main lubricating oil pump; After the compressor reaches a preset oil supply condition, shutting down the pre-lubricating oil pump; Performing load control on the compressor according to the lubricating oil temperature and intake pressure in the compressor; During the operation of the compressor, the degree of abnormal operation is identified according to the degree to which various operating parameters deviate from normal values; After the compressor reaches a shutdown condition, the compressor is shut down.

2. A high-speed reciprocating compressor control method according to claim 1, characterized in that: Based on the gas pressure inside the compressor, the compressor is started and controlled, specifically including: Obtaining the gas pressure inside the compressor by means of a pressure sensor installed in the compressor cylinder; It is determined whether the gas pressure is within a preset pressure range, and if so, the compressor is started up.

3. A high-speed reciprocating compressor control method according to claim 1, characterized in that: After the compressor reaches a preset oil supply condition, the pre-lubricating oil pump is turned off, specifically including: Obtaining the motor speed of the compressor; Obtaining the lubricating oil pressure of the compressor by means of an oil pressure detector installed in the oil circuit of the compressor; After the motor speed reaches a preset speed and the lubricating oil pressure reaches a preset oil pressure threshold, turning off the pre-lubricating oil pump; If the motor speed reaches the preset speed but the lubricating oil pressure does not reach the preset oil pressure threshold, it is considered that the lubricating oil system fails, triggering a shutdown inspection.

4. A high-speed reciprocating compressor control method according to claim 1, characterized in that: The compressor is loaded and controlled according to the lubricating oil temperature and the intake pressure in the compressor, specifically including: Obtaining the lubricating oil temperature of the compressor by means of a lubricating oil temperature detector; After the lubricating oil temperature reaches a second preset oil temperature range, starting a loading program; wherein the loading program includes a manual loading program and an automatic loading program; When the selected loading program is an automatic loading program, the motor speed of the compressor is automatically adjusted according to the intake pressure collected by the pressure sensor until the gas flow meets the on-site demand; If adjusting the motor speed cannot make the gas flow meet the on-site demand, the reflux valve opening will continue to be automatically adjusted until the gas flow meets the on-site demand.

5. A high-speed reciprocating compressor control method according to claim 1, characterized in that: During the operation of the compressor, the degree of abnormal operation is identified according to the degree to which various operating parameters deviate from normal values, including: Various operating parameters of the compressor are obtained in real time through parameter detectors installed in various components of the compressor; wherein the various operating parameters at least include: lubricating oil temperature, lubricating oil pressure, natural gas temperature and pressure, scrubber liquid level, filter pressure difference, bearing temperature, motor rotor temperature, motor stator temperature, compressor vibration value and motor vibration value; If any of the operating parameters is not within the normal range, it is determined that the compressor is operating abnormally and a warning message is sent; The degree of abnormal operation of the compressor is determined according to the difference between the operating parameter that is not within the normal range and the normal value.

6. A high-speed reciprocating compressor control method according to claim 1, characterized in that: After the compressor reaches the shutdown condition, controlling the compressor to shut down the unit specifically includes: When receiving a normal shutdown instruction, controlling the compressor to perform a normal shutdown; When no normal shutdown instruction is received but the operation abnormality of the compressor exceeds a preset abnormality threshold, the compressor is controlled to perform a fault shutdown or an emergency shutdown.

7. A high-speed reciprocating compressor control method according to claim 6, characterized in that: When receiving a normal shutdown instruction, controlling the compressor to perform a normal shutdown specifically includes: When a normal shutdown command is received, the compressor is controlled to perform a slow unloading operation at a preset unloading speed to avoid flow fluctuations.

8. A high-speed reciprocating compressor control method according to claim 6, characterized in that: When no normal shutdown instruction is received but the abnormality of the operation of the compressor exceeds a preset abnormality threshold, the compressor is controlled to perform a fault shutdown or an emergency shutdown, specifically including: During the operation of the compressor, if the degree of abnormal operation exceeds a first preset abnormal degree threshold, a compressor abnormality alarm is issued; If the degree of abnormal operation exceeds a second preset abnormal degree threshold, the host of the compressor is controlled to shut down immediately, and the pre-lubricating oil pump of the compressor is started at the same time, until the host completely stops running, thereby achieving fault shutdown; If the degree of the abnormal operation exceeds the fault threshold, the host and auxiliary equipment of the compressor are immediately powered off to achieve emergency shutdown; Among them, the first preset abnormality level threshold < the second preset abnormality level threshold < the fault threshold.

9. A high-speed reciprocating compressor control system, characterized in that: The system comprises: The compressor start-up self-check and start-up process control module is used to control the start-up of the compressor based on the gas pressure inside the compressor; to detect the start-up state of the compressor, and to start the pre-lubricating oil pump of the compressor after the detection meets the standard, specifically including: obtaining the lubricating oil temperature of the compressor through a lubricating oil temperature detector installed in the compressor oil circuit; obtaining the valve position of each automatic valve in the compressor through a valve group state detector installed on the compressor valve group; if the lubricating oil temperature is within the first preset oil temperature range and the valve positions of each automatic valve are in the correct position, the start-up state detection meets the standard, and the pre-lubricating oil pump of the compressor is started to allow the lubricating oil to enter the crankshaft bearing and the connecting rod bearing; after starting the pre-lubricating oil pump, the auxiliary equipment of the compressor is started in sequence; wherein the auxiliary equipment at least includes: a main motor cooling fan, an air cooler, a cooling water pump and a main lubricating oil pump; and is also used to turn off the pre-lubricating oil pump after the compressor reaches the preset oil supply condition; and the compressor is loaded and controlled according to the lubricating oil temperature and the intake pressure in the compressor; The compressor operation status inspection and control module is used to identify the degree of abnormal operation according to the degree to which various operating parameters deviate from normal values ​​during the operation of the compressor; The compressor shutdown process control module is used to control the shutdown of the compressor after the operating state of the compressor reaches the shutdown condition.

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