SHINKAWA VM-5 Series Monitor

VM-5E Dual Channel Chassis Differential Expansion Monitor: This is the advanced version of VM-5D. It receives differential expansion signals from the LS series LVDT (linear variable differential transformer) and combines them with the output of VM-5D to perform compensation calculations, thereby obtaining the final accurate differential expansion value. This configuration greatly improves measurement accuracy.

VM-5J casing expansion/complementary differential expansion monitor: receives signals from two sensors, adopts complementary arrangement, and can measure a differential expansion range of twice the sensor range.

VM-5N Slope Differential Expansion Monitor: specifically designed to monitor thermal expansion at the rotor slope position to prevent dynamic and static friction.

Rotation and speed monitoring

VM-5S dual channel tachometer: monitors rotor speed, supports forward and reverse detection, and provides zero speed detection. This is crucial for preventing reverse start-up and monitoring the shutdown process.

VM-5Q Reverse Rotation Monitor: specifically designed to detect reverse operations and indicate peak reverse speeds that have occurred.

VM-5R tachometer: While monitoring speed, it can also monitor the acceleration of the rotor and independently set the alarm comparison values for speed and acceleration.

VM-5A valve position monitor: receives valve position signals from LS series LVDT and displays them digitally, suitable for hydraulic speed control systems.

Temperature and special process monitoring

VM-5F dual channel temperature monitor: designed to monitor the temperature of rotating machinery components. It supports grounded or ungrounded thermocouples and 3-wire or 4-wire RTD inputs, with a measurement range of up to 1000 ° C (1832 ° F), fully meeting the monitoring needs of steam turbines and heavy oil machinery.

VM-51 Piston Rod Drop Monitor: This is a specialized monitoring unit for reciprocating compressors. It detects the amount of piston rod drop by measuring the gap between the sensor and the target of the piston rod, usually synchronized with the phase marker signal, and is used to estimate the wear of the piston ring.

VM-52 Bottom Hold Monitor: monitors the gap between the sensor surface and the target surface (bottom gap), used to monitor the bottom hold status of the compressor.

3. Highly integrated relay and interface system

The VM-5 series is not only a data collector, but also an executor of control logic. Through the relay module and interface unit in the backend, it can convert complex analog signals into standard switch or analog outputs, which can be directly connected to DCS or PLC systems.

VM-5Y series relay module unit:

Standard Type (VM-5Y1-3): Provides standard contact outputs (DANGER, ALERT, OK). The input power is 4mA/24VDC or 40mA/24VDC, suitable for general control circuits.

Connector type (VM-5Y4, 5Y5, 5Y6): This is the characteristic feature of this series. In addition to standard contact output, it also provides recorder output through D-Sub interface. Among them, VM-5Y6 also provides buffered output. These outputs are 0-10VDC (or 4-20mA), corresponding to the percentage of monitoring range (0% FS), which can directly drive the chart recorder for historical trend analysis.

VM-5Y7: Designed specifically to complement the VM-5F temperature monitor, providing relay logic for temperature alarms.

VM-5X interface unit and VM-5P labeling unit:

VM-5X: As a signal distribution hub, it collects signals from all monitoring units in the rack and converts them into analog signals (0-5VDC or 4-20mA) or contact signals for output. It supports four output points for each input point (corresponding to OK, ALERT1, ALERT2, DANGER, etc.).

VM-5P: Monitor phase sequence signals (such as rotation direction or phase failure), and provide system normal (OK) contact signals and built-in power supply voltage failure detection function.

VM-53 dual communication unit:

This module is the key to implementing digital management in the VM-5 system. It has two independent serial ports, collects all data inside the rack using Modbus protocol (a registered trademark of Modicon), and sends it to the upper computer (such as the host PC or DCS). More importantly, VM-553 supports daisy chain connections and can collect data from two or more racks, greatly expanding the number of monitored nodes in the system.

4. Data analysis and diagnostic software

In order to fully exploit the massive data collected by the VM-5 hardware, Shinkawa provided the matching inSYS RV-200 vibration analysis and diagnosis system. This software can be connected to the monitoring system through the VM-53 unit to perform detailed fault diagnosis on rotating machinery, such as bearing fault frequency analysis, resonance recognition, etc. It is not only a monitoring tool, but also an expert system for predictive maintenance.

5. Safety compliance and environmental adaptability

The VM-5 series strictly adheres to the highest international standards from the beginning of its design:

API 670: Fully complies with the American Petroleum Institute's monitoring standards for auxiliary machinery and is a legal configuration for TSI systems.