Pipeline compressor mechanical state monitoring device

Abstract

The utility model discloses a pipeline compressor mechanical state monitoring device, which belongs to the technical field of compressor mechanical state monitoring and comprises a mechanical state monitoring module, a temperature monitoring module, a compressor control module, an emergency stop module, a frequency conversion control module, a mechanical state diagnosis module, a torsional vibration analysis module and a pipe network inspection center. Wherein a temperature detection signal conversion safety barrier of the temperature monitoring module is connected to the compressor control module, and the compressor control module sends the unit state in the speed increasing / reducing process to the mechanical state monitoring module, so that the mechanical state monitoring module can accurately set state parameters according to different working conditions of the unit; the torsional vibration analysis module carries out torsional vibration analysis through an original rotating speed signal from the mechanical state monitoring module, a contact signal between the emergency stop module and the frequency conversion control system module adopts a triple-redundancy structure, and effective monitoring and reliable protection of the mechanical state of the compressor are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to compressor mechanical state monitoring technical field, concretely relates to a pipeline compressor mechanical state monitoring device. BACKGROUND

[0002] Compressors are various, and the compressor used in the gas compression station of long-distance natural gas pipeline is the most core equipment of natural gas pipeline transportation. The pipeline compressor is generally divided into reciprocating and centrifugal, and the reciprocating is more applied to small caliber branch pipeline, and the centrifugal is applied to high pressure, large caliber and large flow pipeline, and has more extensive use.

[0003] The existing electric drive centrifugal compressor is provided with a unit monitoring system MMS (Machinery Monitoring System), and the MMS system can continuously monitor the parameters such as the speed, shaft vibration, shaft displacement and bearing temperature of the compressor, help the operator to determine the machine fault, so that the fault can be timely alarmed and stopped before causing serious damage, and the safety of the unit is ensured.

[0004] The MMS system is mainly composed of sensors and intelligent plates, and the existing pipeline compressor adopts the imported Bently 3500 product. The Bently MMS system utilizes a temperature special monitoring module to provide bearing temperature information to an online diagnosis system for unit diagnosis and analysis. The bearing temperature signal is sent to a 3500 / 61-01-00 special temperature module, and the logic configuration is executed through a relay module 3500 / 33-01-00. The configuration function is single, and in the aspects of signal logic processing and equipment reliability, it cannot meet the requirements of the domestic pipeline compressor mechanical state monitoring device. Therefore, the research on the new compressor mechanical state monitoring device can solve the problem of the imported brand Bently "neck" and has great significance for the safe operation of the compressor.

[0005] In the prior art, the invention patent with publication number CN102425558A and publication date of April 25, 2012 discloses a fuel-driven compressor unit monitoring device. The scheme actually solves the problem of the redundant controller of the fuel-driven unit monitoring system, and does not elaborate the scheme of monitoring the related signals of the compressor mechanical state such as the vibration of the compressor, the bearing temperature, the speed and the axial displacement. Therefore, the scheme cannot meet the requirements of the domestic pipeline compressor MMS system. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at solving the problem that the existing compressor unit monitoring system cannot meet the requirements of the domestic pipeline compression and mechanical state monitoring, and proposes a pipeline compressor mechanical state monitoring device. The device not only meets the requirements of the domestic pipeline compressor for mechanical state monitoring, but also improves the reliability of system monitoring.

[0007] In order to realize the above-mentioned utility model purposes, the technical scheme of the utility model is as follows:

[0008] A pipeline compressor mechanical state monitoring device, comprising a mechanical state monitoring module, a temperature monitoring module, a compressor control module, an emergency stop module, a frequency conversion control module, a mechanical state diagnosis module, a torsional vibration analysis module and a pipeline network inspection center;

[0009] The mechanical state monitoring module is connected with the sensor group, receives the compressor mechanical state detection signal from the sensor group and performs alarm / shut-down output logic judgment processing;

[0010] The compressor control module is connected with the mechanical state monitoring module, the frequency conversion control module and the temperature monitoring module, receives the output of the mechanical state monitoring module and the frequency conversion control module to perform speed control, and performs shut-down output logic judgment processing on the temperature detection signal output by the temperature monitoring module;

[0011] The emergency stop module is connected with the compressor control module and the mechanical state monitoring module, receives the shut-down signal from the compressor control module and the mechanical state monitoring module and performs judgment processing;

[0012] The frequency conversion control module is connected with the emergency stop module and the compressor control module, receives the shut-down signal from the emergency stop module and outputs the compressor speed feedback to the compressor control module;

[0013] The torsional vibration analysis module is connected with the mechanical state monitoring module, receives the detection parameter original signal from the mechanical state monitoring module to perform torsional vibration analysis;

[0014] The mechanical state diagnosis module is connected with the compressor control module and the mechanical state monitoring module respectively, receives the original parameter detection signal from the mechanical state diagnosis module and the compressor control module and performs diagnosis analysis on the compressor state;

[0015] The pipeline network inspection center is connected with the mechanical state diagnosis module, receives and displays the related data and diagnosis results from the mechanical state diagnosis module.

[0016] Further, the signal output end of the compressor control module is further connected with the mechanical state monitoring module, used for outputting the speed-up / speed-down state of the unit to the mechanical state monitoring module to cooperate with the same to perform logic judgment processing on the detection parameters under different working conditions.

[0017] Further, the frequency conversion control module comprises three independent frequency conversion PLC circuits, a tripping circuit and a closing circuit, the emergency stop module comprises three shut-down signal output interfaces, and the three shut-down signal output interfaces are connected with the three independent circuits of the frequency conversion control module one by one in a corresponding manner.

[0018] Further, the mechanical state diagnosis module is connected with the mechanical state monitoring module in a hardwired mode.

[0019] Further, the mechanical state diagnosis module is connected with the compressor control module and the pipe network inspection center in a MODBUS TCP communication mode.

[0020] Further, the sensor group connected with the mechanical state monitoring module comprises vibration, shaft displacement, phase and rotating speed sensors, each sensor is respectively connected with a corresponding preamplifier and a safety barrier, the preamplifier converts the original signal of the sensor into a voltage signal, and the voltage signal is sent into the mechanical state monitoring module after the safety barrier.

[0021] Further, the temperature monitoring module comprises a bearing temperature thermal resistance, a thrust pad temperature thermal resistance and a signal conversion safety barrier connected with each thermal resistance in a one-to-one mode, the signal conversion safety barrier converts the PT100 signal of the thermal resistance into a 4-20mA signal, and then the 4-20mA signal is sent into the compressor control module.

[0022] Further, the vibration, shaft displacement, phase and rotating speed sensors are installed on the pipeline compressor.

[0023] Further, the bearing temperature thermal resistance and the thrust pad temperature thermal resistance are respectively installed on the bearing pad and the thrust pad of the pipeline compressor.

[0024] In summary, the utility model has the following advantages:

[0025] 1. The compressor mechanical state monitoring device provided by the utility model contains a compressor mechanical state monitoring, temperature monitoring, compressor control, emergency stop, mechanical state diagnosis, torque analysis and frequency conversion control part, and the circuit architecture of the device can realize the detection, analysis and monitoring of the mechanical state and temperature of the compressor unit, thereby guaranteeing the safe operation of the compressor unit.

[0026] 2. In the utility model, the bearing temperature and the thrust pad temperature detected by the temperature monitoring module are connected to the compressor control module through the signal conversion safety barrier, thereby breaking the transmission limitation of the bearing temperature signal of the pipeline compressor in the existing imported product and improving the flexible matching property and the application range.

[0027] 3. In the utility model, the torque analysis module is connected with the mechanical state monitoring module, receives the rotating speed original signal containing frequency information of the mechanical state monitoring module, and can facilitate the torque analysis module to perform torque analysis on the original signal, thereby realizing the unit torque monitoring and guaranteeing the safe operation of the unit.

[0028] 4、The utility model discloses a compressor control module is connected with mechanical condition monitoring module, and through the " speed up / slow down " state of output to mechanical condition monitoring module to make it can accurately logical processing judgment to detection parameter according to different operating conditions, avoid the " false shutdown " of unit;

[0029] 5、The utility model discloses an emergency stop module sends into the liaison signal of frequency conversion control module and divides into three ways, and respectively enters the different loop of frequency conversion control module, effectively improved the reliability of shutdown operating condition action, guaranteed unit safe operation;

[0030] 6、The utility model discloses a compressor control module is connected with mechanical condition monitoring module and frequency conversion control module, can receive the detection speed signal from mechanical condition monitoring module and the speed calculation value from frequency conversion control module, to effectively improve the accuracy and reliability of speed control. BRIEF DESCRIPTION OF DRAWINGS

[0031] The utility model will be further explained in detail in the following with the drawings of specification and specific embodiment, wherein:

[0032] Figure 1 It is data flow schematic diagram of the utility model;

[0033] Figure 2 It is compressor shaft vibration monitoring signal process logic flow schematic diagram in the utility model;

[0034] Figure 3 It is compressor axial displacement monitoring signal process logic flow schematic diagram in the utility model;

[0035] Figure 4 It is compressor bearing pad temperature monitoring signal process logic flow schematic diagram in the utility model;

[0036] Figure 5 It is compressor thrust bearing pad temperature monitoring signal process logic flow schematic diagram in the utility model;

[0037] Mark in the drawing:

[0038] 1, mechanical state monitoring module, 2, compressor control module, 3, emergency stop module, 4, torsional vibration analysis module, 5, mechanical state diagnosis module, 6, frequency conversion control module, 7, pipe network inspection center, 8, compressor 1# shaft vibration X sensor, 9, compressor 1# shaft vibration Y sensor, 10, compressor 2# shaft vibration X sensor, 11, compressor 2# shaft vibration Y sensor, 12, compressor 1# axial displacement sensor, 13, compressor 2# axial displacement sensor, 14, compressor 3# axial displacement sensor, 15, compressor healthy phase sensor, 16, compressor 1# speed sensor, 17, compressor 2# speed sensor, 18, preamplifier, 19, safety barrier, 20, compressor 1# bearing bush temperature resistance-1 (compressor side), 21, compressor 1# bearing bush temperature resistance-2 (compressor side), 22, compressor 2# bearing bush temperature resistance-1 (motor side), 23, compressor 2# bearing bush temperature resistance-2 (motor side), 24, compressor thrust bearing bush temperature resistance-1 (drive end), 25, compressor thrust bearing bush temperature resistance-2 (drive end), 26, compressor thrust bearing bush temperature resistance-1 (non-drive end), 27, compressor thrust bearing bush temperature resistance-2 (non-drive end), 28, signal conversion safety barrier. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the present application, the present application will be further described below in conjunction with preferred embodiments and drawings. Those skilled in the art should understand that the following specific description is illustrative rather than limiting, and should not limit the protection scope of the present application.

[0040] The present application provides a kind of pipeline compressor mechanical state monitoring device, including electrically connected mechanical state monitoring module, temperature monitoring module, compressor control module, emergency stop module, frequency conversion control module, mechanical state diagnosis module, torsional vibration analysis module and pipe network inspection center, signal is mutually transmitted between each module, there is hardwiring and communication data stream, as shown in Figure 1 .

[0041] Among them, the signal input end of mechanical state monitoring module is connected with sensor group, for receiving the compressor mechanical state detection signal from sensor group and the logic judgment processing of alarm / shut down output.

[0042] Compressor control module is connected with the mechanical state monitoring module, frequency conversion control module and temperature monitoring module, receives the output of mechanical state monitoring module and frequency conversion control module and carries out speed control, and the logic judgment processing of temperature detection signal output by temperature monitoring module is carried out to stop output.

[0043] The emergency stop module is connected with the compressor control module and the mechanical state monitoring module, receives the stop signals from the compressor control module and the mechanical state monitoring module and performs judgment processing.

[0044] The frequency conversion control module is connected with the emergency stop module and the compressor control module, receives the stop signals from the emergency stop module and outputs the compressor rotating speed feedback to the compressor control module.

[0045] The torsional vibration analysis module is connected with the mechanical state monitoring module, receives the original signal of the detection parameters from the mechanical state monitoring module to perform torsional vibration analysis. In the scheme, the original rotating speed signal in the mechanical state monitoring module is output to the torsional vibration analysis module to perform torsional vibration analysis, which can realize the unit torsional vibration monitoring function and effectively protect the safe operation of the compressor unit.

[0046] The mechanical state diagnosis module is connected with the compressor control module and the mechanical state monitoring module respectively, receives the original parameter detection signal from the mechanical state diagnosis module and the compressor control module and performs diagnosis analysis on the state of the compressor.

[0047] The pipe network inspection center is connected with the mechanical state diagnosis module, receives and displays the related data and diagnosis results from the mechanical state diagnosis module.

[0048] Further, the signal output end of the compressor control module is also connected with the mechanical state monitoring module, which is used to output the speed-up / speed-down state of the unit to the mechanical state monitoring module to cooperate with the logical judgment processing of the detection parameters under different working conditions. The compressor control module sends the unit state in the speed-up / speed-down process to the mechanical state monitoring module, which can set the accurate state parameters according to the different operating states of the unit to avoid the "false stop" of the unit.

[0049] Preferably, in the scheme, the frequency conversion control module is divided into three independent frequency conversion PLC circuits, a tripping circuit and a closing circuit, and the emergency stop module is divided into three stop signal output interfaces, which are connected with the three independent circuits of the frequency conversion control module one by one.

[0050] In the scheme, the mechanical state diagnosis module and the mechanical state monitoring module are connected in a hard-wired manner. The mechanical state diagnosis module is connected with the compressor control module and the pipe network inspection center in a MODBUS TCP communication mode.

[0051] In the scheme, the sensor group connected with the mechanical state monitoring module includes vibration, shaft displacement, healthy phase, and rotating speed sensors, each sensor is respectively connected with a corresponding preamplifier and safety barrier, the preamplifier converts the original signal of the sensor into a voltage signal, and the voltage signal is sent into the mechanical state monitoring module after the safety barrier.

[0052] In the scheme, the vibration, shaft displacement, healthy phase, and rotating speed sensors are installed on the pipeline compressor, wherein the vibration is configured with 4 points, the shaft displacement is configured with 3 points, the healthy phase is configured with 1 point, and the rotating speed is configured with 2 points. The bearing temperature thermal resistance and the thrust bearing temperature thermal resistance are respectively installed on the bearing pad and the thrust bearing pad of the pipeline compressor, wherein the No. 1 bearing temperature is configured with 2 points, the No. 2 bearing temperature is configured with 2 points, and the thrust bearing temperature is configured with 4 points.

[0053] Preferably, the sensor used in the scheme is of an eddy current principle, is intrinsically safe, and has an explosion-proof level of Exia II CT5. The preamplifier outputs a voltage range of -2~-18V. The safety barriers connected with each sensor and thermal resistance are all isolation type safety barriers. The thermal resistance is of a PT100 three-wire system, is intrinsically safe, and has an explosion-proof level of Exia II C T5.

[0054] Embodiment 1

[0055] As the basic embodiment of the utility model, refer to the attached Figure 1 The pipeline compressor mechanical state monitoring device of the embodiment includes a mechanical state monitoring module 1, a compressor control module 2, an emergency stop module 3, and a mechanical state diagnosis module 5.

[0056] The mechanical state monitoring module 1 is connected with a sensor group (a compressor 1# shaft vibration X sensor 8, a compressor 1# shaft vibration Y sensor 9, a compressor 2# shaft vibration X sensor 10, and a compressor 2# shaft vibration Y sensor 11), and each sensor is one-to-one connected with a preamplifier 18 and a safety barrier 19.

[0057] Specifically, refer to the attached Figure 1, the front end device 18 sends the eddy current sensor signal to the mechanical state monitoring module 1 after amplification and conditioning and through the safety barrier 19. The mechanical state monitoring module 1 processes the four vibration signals logically and sends the four vibration signals (4-20 mA) and the related alarm output signals to the compressor control module 2 and sends the related shutdown output signals to the emergency shutdown module 3 to realize the emergency shutdown of the compressor unit. The mechanical state monitoring module 1 sends the four vibration original signals to the mechanical state diagnosis module 5 for analyzing the vibration values of each frequency of the compressor and providing suggestions for the safety and reliability of the compressor unit and the corresponding maintenance measures. The compressor control module 2 sends the signal of the state of the unit in the "speed-up / speed-down process" to the mechanical state monitoring module 1, and the mechanical state monitoring module 1 processes the four vibration signals logically according to the different working conditions of the state signal.

[0058] Further referring to the accompanying drawings Figure 2 The input signals of the mechanical state monitoring module 1 are as follows:

[0059] The compressor 1# shaft vibration X, the compressor 1# shaft vibration Y, the compressor 2# shaft vibration X, the compressor 2# shaft vibration Y and the speed-up / speed-down process.

[0060] After the logical judgment and processing of the alarm / shutdown output of the above five signals, the following signals can be output:

[0061] ① Output alarm signal: compressor 1# shaft vibration X high (alarm), compressor 1# shaft vibration Y high (alarm), compressor 2# shaft vibration X high (alarm), compressor 2# shaft vibration Y high (alarm) and compressor bearing abnormal alarm.

[0062] If the value of any shaft vibration signal exceeds the set threshold value (such as 90 μm), the corresponding overrun early warning is triggered. Each shaft vibration abnormal signal is realized through a quality judgment module, which includes monitoring four aspects of whether the sensor is correctly installed, whether the line connection is loose, whether the channel is faulty and whether the signal range is overrun. If any data is abnormal, the corresponding shaft vibration abnormality is triggered. Compressor 1# shaft vibration X abnormal, compressor 1# shaft vibration Y abnormal, compressor 2# shaft vibration X abnormal, compressor 2# shaft vibration Y abnormal through or gate function block, any shaft vibration abnormality triggers compressor shaft vibration abnormality alarm.

[0063] ② Output shutdown signal: compressor 1# shaft vibration high-high-1 (shutdown), compressor 1# shaft vibration high-high-2 (shutdown), compressor 1# shaft vibration high-high-3 (shutdown), compressor 2# shaft vibration high-high-1 (shutdown), compressor 2# shaft vibration high-high-2 (shutdown) and compressor 2# shaft vibration high-high-3 (shutdown).

[0064] Triggering the compressor 1# vibration high shutdown can be divided into the following five cases:

[0065] 1) Compressor 1# shaft vibration X greater than 90 μm and Compressor 1# shaft vibration Y greater than 125 μm (greater than 200 μm during speed-up / speed-down process);

[0066] 2) Compressor 1# shaft vibration X abnormal and Compressor 1# shaft vibration Y greater than 125 μm (greater than 200 μm during speed-up / speed-down process);

[0067] 3) Compressor 1# shaft vibration Y greater than 90 μm and Compressor 1# shaft vibration X greater than 125 μm (greater than 200 μm during speed-up / speed-down process);

[0068] 4) Compressor 1# shaft vibration Y abnormal and Compressor 1# shaft vibration X greater than 125 μm (greater than 200 μm during speed-up / speed-down process);

[0069] 5) Compressor 1# shaft vibration X greater than 125 μm (greater than 200 μm during speed-up / speed-down process) and Compressor 1# shaft vibration Y greater than 125 μm (greater than 200 μm during speed-up / speed-down process).

[0070] After the above-mentioned five cases are triggered, the time delay function block delays for 1 second, and the non-function block outputs Compressor 1# shaft vibration high-high-1 (stop), Compressor 1# shaft vibration high-high-2 (stop), Compressor 1# shaft vibration high-high-3 (stop). The state during speed-up / speed-down process is sent to the mechanical state monitoring module 1 by the compressor control module 2, the time delay function block delays for 1 second to prevent signal interference, and the non-function block is used to make the output signal common open and common close contact reverse, so as to prevent the stop signal from being unable to be normally sent to the emergency stop module when the signal line is loose.

[0071] Similarly, Compressor 2# shaft vibration high-high-1 (stop), Compressor 2# shaft vibration high-high-2 (stop), Compressor 2# shaft vibration high-high-3 (stop) and Compressor 2# shaft vibration high-high-1 / -2 / -3 (stop) are similar.

[0072] Example 2

[0073] Based on the example 1, referring to the attached Figure 1 The pipeline compressor mechanical state monitoring device in the example includes a mechanical state monitoring module 1, a compressor control module 2, an emergency stop module system 3 and a mechanical state diagnosis module 5.

[0074] The mechanical state monitoring module 1 is connected with a sensor group (Compressor 1# shaft displacement sensor 12, Compressor 2# shaft displacement sensor 13, Compressor 3# shaft displacement sensor 14), and each sensor is connected with a preamplifier 18 and a safety barrier 19 in one-to-one correspondence.

[0075] Specifically, referring to the attached Figure 1, the front end device amplifies and processes the eddy current sensor signals and sends them to the mechanical state monitoring module 1 through the safety barrier 19. The mechanical state monitoring module 1 processes the three axial displacement signals and sends the alarm output signals related to the three axial displacement signals (4-20mA) to the compressor control module 2 and the shutdown output signals to the emergency shutdown module 3, so as to realize the emergency shutdown of the compressor unit. The mechanical state monitoring module 1 sends the three axial displacements (raw signals) to the mechanical state diagnosis module 5 for analysis of the axial displacement values of the compressor, and provides suggestions for the safety and reliability of the compressor unit and corresponding maintenance measures.

[0076] Further, with reference to the accompanying drawings Figure 3 The input signals of the mechanical state monitoring module 1 are the axial displacement of the compressor 1#, the axial displacement of the compressor 2#, and the axial displacement of the compressor 3#. After logical judgment and processing of the alarm / shutdown output, the following signals can be output:

[0077] ① Output alarm signal: axial displacement of compressor 1# (alarm), axial displacement of compressor 2# (alarm), axial displacement of compressor 3# (alarm).

[0078] ② Output shutdown signal: axial displacement of compressor-1 (shutdown), axial displacement of compressor-2 (shutdown), axial displacement of compressor-3 (shutdown).

[0079] Specifically, the following conditions can trigger the axial displacement alarm of the compressor:

[0080] 1) When the axial displacement of the compressor 1# is greater than 0.5mm (positive direction) or less than -0.9mm (negative direction), the axial displacement of the compressor 1# (alarm) is triggered.

[0081] 2) When the axial displacement of the compressor 2# is greater than 0.5mm (positive direction) or less than -0.9mm (negative direction), the axial displacement of the compressor 2# (alarm) is triggered.

[0082] 3) When the axial displacement of the compressor 3# is greater than 0.5mm (positive direction) or less than -0.9mm (negative direction), the axial displacement of the compressor 3# (alarm) is triggered.

[0083] The shutdown of the axial displacement of the compressor can be executed by the two-out-of-three condition, i.e. triggering when any two of the three conditions are met, and the three conditions are:

[0084] 1) The axial displacement of the compressor 1# is greater than 0.7mm (positive direction) or less than -1.1mm (negative direction).

[0085] 2) The axial displacement of the compressor 2# is greater than 0.7mm (positive direction) or less than -1.1mm (negative direction).

[0086] 3) Compressor 3 axial displacement greater than 0.7mm (positive direction) or less than -1.1mm (negative direction).

[0087] After the three-to-two, through the delay function block delay 1 second, through the non-function block output compressor axial displacement-1 (shutdown), compressor axial displacement-2 (shutdown), compressor axial displacement-3 (shutdown). The effect of delaying 1 second is to prevent signal interference, and the effect of the non-function block is to flip the output signal normally open and normally closed contact, preventing the shutdown signal from being sent to the emergency stop module 3 when the line is loose.

[0088] Example 3

[0089] As the basic embodiment of the utility model, refer to the attached Figure 1 The pipeline compressor mechanical state monitoring device comprises a temperature monitoring module, a compressor control module 2, an emergency stop module 3 and a mechanical state diagnosis module 5.

[0090] The temperature monitoring module comprises: a compressor 1# bearing bush warm resistance-1 (compressor side) 20; a compressor 1# bearing bush warm resistance-2 (compressor side) 21; a compressor 2# bearing bush warm resistance-1 (motor side) 22; a compressor 2# bearing bush warm resistance-2 (motor side) 23; and a signal conversion safety barrier 28 connected in one-to-one correspondence with each thermal resistance.

[0091] Specifically, refer to the attached Figure 1 The signal conversion safety barrier 28 converts the bearing bush thermal resistance PT100 signal into a 4-20mA signal after isolation and conversion, and sends the signal into the compressor control module 2. The compressor control module 2 performs logical processing on the four temperature signals and sends the related shutdown signals (digital quantities) into the emergency stop module 3 for realizing the emergency shutdown of the compressor unit, and sends the four temperature signals into the mechanical state diagnosis module 5 in the form of MODBUS TCP communication, for analyzing the compressor bearing temperature signal and providing safety and reliability suggestions and corresponding maintenance measures for the compressor unit.

[0092] Further refer to the attached Figure 4 The input of the compressor control module 2 is the compressor 1# bearing bush warm resistance-1 (compressor side), the compressor 1# bearing bush warm resistance-2 (compressor side), the compressor 2# bearing bush warm resistance-1 (motor side) and the compressor 2# bearing bush warm resistance-2 (motor side) after signal conversion and isolation. After logical judgment processing of the four signals, the following signals can be output:

[0093] ①Output stop signal: compressor 1# bearing temperature high high-1 (stop), compressor 1# bearing temperature high high-2 (stop), compressor 1# bearing temperature high high-3 (stop), compressor 2# bearing temperature high high-1 (stop), compressor 2# bearing temperature high high-2 (stop) and compressor 2# bearing temperature high high-3 (stop).

[0094] Triggering the compressor 1# bearing temperature high high stop can set the following five cases:

[0095] 1) Compressor 1# bearing temperature resistance-1 (compressor side) is greater than 105℃ and compressor 1# bearing temperature resistance-2 (compressor side) is greater than 115℃;

[0096] 2) Compressor 1# bearing temperature resistance-1 (compressor side) is abnormal and compressor 1# bearing temperature resistance-2 (compressor side) is greater than 115℃;

[0097] 3) Compressor 1# bearing temperature resistance-2 (compressor side) is greater than 105℃ and compressor 1# bearing temperature resistance-1 (compressor side) is greater than 115℃;

[0098] 4) Compressor 1# bearing temperature resistance-2 (compressor side) is abnormal and compressor 1# bearing temperature resistance-1 (compressor side) is greater than 115℃;

[0099] 5) Compressor 1# bearing temperature resistance-1 (compressor side) is greater than 115℃ and compressor 1# bearing temperature resistance-2 (compressor side) is greater than 115℃.

[0100] After the above five cases are triggered, the delay function block is delayed for 1 second, and the compressor 1# bearing temperature high high-1 (stop), the compressor 1# bearing temperature high high-2 (stop) and the compressor 1# bearing temperature high high-3 (stop) are output through the non-function block. Among them, each bearing temperature abnormal signal can be realized through a quality judgment module, and signal quality judgment includes monitoring whether the signal conversion safety barrier 28 conversion function is normal, whether the line connection is loose, whether the channel is faulty and whether the signal range is out of limit. Any data abnormality triggers the corresponding bearing temperature abnormality. The function of delaying for 1 second is to prevent signal interference, and the function of the non-function block is to let the output signal common open and common close contact reverse, preventing the stop signal from being unable to normally send to the emergency stop module 3 when the signal line is loose.

[0101] Similarly, the compressor 2# bearing temperature high high-1 (stop), the compressor 2# bearing temperature high high-2 (stop), the compressor 2# bearing temperature high high-3 (stop) and the compressor 1# bearing temperature high high-1 / -2 / -3 (stop) are similar.

[0102] Example 4

[0103] As the basic embodiment of the utility model, refer to the attached Figure 1 The pipeline compressor mechanical state monitoring device comprises a temperature monitoring module, a compressor control module 2, an emergency shutdown module 3 and a mechanical state diagnosis module 5.

[0104] The temperature monitoring module comprises: a compressor thrust bearing bush temperature resistance-1 (drive end) 24; a compressor thrust bearing bush temperature resistance-2 (drive end) 25; a compressor thrust bearing bush temperature resistance-1 (non-drive end) 26; a compressor thrust bearing bush temperature resistance-2 (non-drive end) 27; and a signal conversion safety barrier 28 connected in one-to-one correspondence with each thermal resistance.

[0105] Specifically, refer to the attached Figure 1 The signal conversion safety barrier 28 converts and isolates the thrust bearing bush thermal resistance PT100 signal and then converts it into a 4-20mA signal and sends it to the compressor control module 2. The compressor control module 2 logically processes the four temperature signals and sends three shutdown signals (digital quantities) to the emergency shutdown module 3 for realizing emergency shutdown of the compressor unit, and sends the four temperature signals to the mechanical state diagnosis module 5 in the form of MODBUS TCP communication for analyzing the compressor thrust bearing temperature signal, realizing the provision of safety and reliability suggestions for the compressor unit and corresponding maintenance measures.

[0106] Further refer to the attached Figure 5 The input of the compressor control module 2 is the compressor thrust bearing bush temperature resistance-1 (drive end), the compressor thrust bearing bush temperature resistance-2 (drive end), the compressor thrust bearing bush temperature resistance-1 (non-drive end) and the compressor thrust bearing bush temperature resistance-2 (non-drive end) after signal conversion and isolation by the safety barrier. After logical judgment and processing of the four signals output by the shutdown output, the following signals are output:

[0107] ① Shutdown signal: compressor thrust bearing bush temperature high-1 (shutdown), compressor thrust bearing bush temperature high-2 (shutdown), compressor thrust bearing bush temperature high-3 (shutdown).

[0108] The trigger compressor thrust bearing bush temperature high shutdown condition can be set as:

[0109] The compressor thrust bearing pad temperature high high-1 (stop), the compressor thrust bearing pad temperature high high-2 (stop), the compressor thrust bearing pad temperature high high-3 (stop) are outputted through the non-function block after the delay function block delays for 1 second when the two values of the compressor thrust bearing pad temperature resistance-1 (non-driving end) and the compressor thrust bearing pad temperature resistance-2 (non-driving end) are high, the high value is taken, the three values of the compressor thrust bearing pad temperature resistance-1 (driving end), the compressor thrust bearing pad temperature resistance-2 (driving end) are taken as the intermediate size, and the three values are compared with 110 DEG C.

[0110] For the thermal resistance sensor, the signal processing accuracy can be improved by adopting the two high value taking and three intermediate value taking processing mode when the sensor fails, the output of the compressor thrust bearing pad temperature high high stop command is not affected when any one of the compressor thrust bearing pad temperature resistance-1 (non-driving end) and the compressor thrust bearing pad temperature resistance-2 (non-driving end) fails, and the output of the compressor thrust bearing pad temperature high high stop command is not affected when any one of the compressor thrust bearing pad temperature resistance-1 (driving end) and the compressor thrust bearing pad temperature resistance-2 (driving end) fails. The function of delaying for 1 second is to prevent signal interference, and the function of the non-function block is to make the output signal common open and common closed contact flip, so that the stop signal can be normally sent to the emergency stop module 3 when the signal line is loose.

[0111] Embodiment 5

[0112] As the basic embodiment of the utility model, refer to the attached Figure 1 The pipeline compressor mechanical state monitoring device comprises a mechanical state monitoring module 1, a compressor control module 2, an emergency stop module 3, a mechanical state diagnosis module 5, a frequency conversion control module 6 and a torsional vibration analysis module 4.

[0113] The mechanical state monitoring module 1 is connected with a sensor group (a compressor 1# rotation speed sensor 16 and a compressor 2# rotation speed sensor 17), and each sensor is connected with a preamplifier 18 and a safety barrier 19 in a one-to-one correspondence.

[0114] Specifically, refer to the attached Figure 1, the front end device sends the eddy current sensor signal into the mechanical state monitoring module 1 after amplification and conditioning. The mechanical state monitoring module 1 processes two rotating speed signals and sends the two rotating speed signals (4-20mA) into the compressor control module 2. The frequency conversion control module 6 sends the calculated rotating speed of the compressor into the compressor control module 2. The compressor control module 2 takes the middle value of three rotating speed signals for the rotating speed control of the compressor, two of which are from the output of the mechanical state monitoring module 1, and one of which is from the output of the frequency conversion control module 6. The mechanical state monitoring module 1 processes two rotating speed signals and sends one rotating speed signal (original signal) into the torsional vibration analysis module 4 for the monitoring of the torsional vibration of the compressor rotor. The mechanical state monitoring module 1 sends two rotating speeds (original signals) into the mechanical state diagnosis module 5 for the analysis of the rotating speed values of the compressor, so as to provide reliable suggestions and corresponding maintenance measures.

[0115] Embodiment 6

[0116] As the basic embodiment of the utility model, refer to the attached Figure 1 The pipeline compressor mechanical state monitoring device of the utility model comprises a mechanical state monitoring module 1, a temperature monitoring module, a compressor control module 2, an emergency stop module 3, a mechanical state diagnosis module 5, a frequency conversion control module 6 and a pipeline network inspection center 7.

[0117] The emergency stop module 3 sends three emergency stop commands of the unit to the frequency conversion control module 6, and the three emergency stops are sent to the tripping circuit, the closing circuit and the PLC circuit of the frequency conversion control module respectively. The signals adopt triple redundancy and are sent to different circuits, so that the safe stop of the unit is effectively ensured. The mechanical state monitoring module 1 sends the original signals of the compressor vibration, the axial displacement, the rotating speed and the healthy phase into the mechanical state diagnosis module 5 in a hard-wired mode, the compressor control module 2 sends the bearing temperature and the thrust pad temperature of the unit into the mechanical state diagnosis module 5 in a MODBUS TCP communication mode, and the mechanical state diagnosis module 5 collects the compressor vibration, the axial displacement, the rotating speed, the bearing temperature and the thrust pad temperature for analysis and diagnosis.

[0118] The mechanical state diagnosis module 5 sends the compressor related data and the diagnosis results into the pipeline network inspection center 7 in a MODBUS TCP communication mode, so as to realize the centralized management of the parameters of the station compressor by the pipeline network.

[0119] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form, and any simple modification and equivalent change according to the technical essence of the utility model to the above embodiment all fall within the protection scope of the utility model.

Claims

1. A pipeline compressor mechanical condition monitoring apparatus, characterized by, The mechanical state monitoring module, the temperature monitoring module, the compressor control module, the emergency stop module, the frequency conversion control module, the mechanical state diagnosis module, the torsional vibration analysis module and the pipe network inspection center are included. The mechanical state monitoring module is connected with the sensor group, receives the compressor mechanical state detection signal from the sensor group and performs the logic judgment processing of the alarm / shut down output. The compressor control module is connected with the mechanical state monitoring module, the frequency conversion control module and the temperature monitoring module, receives the output of the mechanical state monitoring module and the frequency conversion control module to perform the speed control, and performs the logic judgment processing of the temperature detection signal output by the temperature monitoring module. The emergency stop module is connected with the compressor control module and the mechanical state monitoring module, receives the stop signal from the compressor control module and the mechanical state monitoring module and performs the judgment processing. The frequency conversion control module is connected with the emergency stop module and the compressor control module, receives the stop signal from the emergency stop module and outputs the compressor speed feedback to the compressor control module. The torsional vibration analysis module is connected with the mechanical state monitoring module, receives the detection parameter original signal from the mechanical state monitoring module to perform the torsional vibration analysis. The mechanical state diagnosis module is connected with the compressor control module and the mechanical state monitoring module respectively, receives the original parameter detection signal from the mechanical state diagnosis module and the compressor control module and diagnoses and analyzes the compressor state. The pipe network inspection center is connected with the mechanical state diagnosis module, receives and displays the related data and diagnosis results from the mechanical state diagnosis module.

2. A pipeline compressor mechanical condition monitoring apparatus as recited in claim 1 wherein, The signal output end of the compressor control module is also connected with the mechanical state monitoring module, used for outputting the speed up / speed down state of the unit to the mechanical state monitoring module to cooperate with the logic judgment processing of the detection parameter under different working conditions.

3. A pipeline compressor mechanical condition monitoring apparatus as recited in claim 1 wherein, The frequency conversion control module has three independent frequency conversion PLC circuits, a breaking circuit and a closing circuit, and the emergency stop module has three stop signal output interfaces, which are connected with the three independent circuits of the frequency conversion control module one by one.

4. A pipeline compressor mechanical condition monitoring apparatus as recited in claim 1 wherein, The mechanical state diagnosis module and the mechanical state monitoring module are connected in a hard-wired mode.

5. A pipeline compressor mechanical condition monitoring apparatus as recited in claim 1 wherein, The mechanical state diagnosis module is connected with the compressor control module and the pipe network inspection center in a MODBUS TCP communication mode.

6. A pipeline compressor mechanical condition monitoring apparatus as recited in claim 1 wherein, The sensor group connected with the mechanical state monitoring module includes vibration, shaft displacement, phase and speed sensors, each sensor is respectively connected with a corresponding preamplifier and a safety barrier, the preamplifier converts the original signal of the sensor into a voltage signal, which is sent to the mechanical state monitoring module after the safety barrier.

7. A pipeline compressor mechanical condition monitoring apparatus as set forth in claim 1 wherein, The temperature monitoring module includes bearing temperature thermal resistance, thrust pad temperature thermal resistance and a signal conversion safety barrier connected with each thermal resistance one by one, the signal conversion safety barrier converts the PT100 signal of the thermal resistance into a 4-20mA signal and sends it to the compressor control module.

8. A pipeline compressor mechanical condition monitoring apparatus as recited in claim 6 wherein, The vibration, shaft displacement, phase and speed sensors are installed on the pipeline compressor.

9. A pipeline compressor mechanical condition monitoring apparatus as recited in claim 7 wherein, The bearing temperature thermal resistance and the thrust pad temperature thermal resistance are respectively installed on the bearing pad and the thrust pad of the pipeline compressor.

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