The basic of Generator fault diagnosis scheme

    Diesel generating set is a very important mechanical and electrical equipment, widely used in municipal maintenance, many aspects, such as agricultural production and industrial projects, for our country's industrial economic development has made a great contribution.In some areas, power supply diesel generator is particularly important, once appear, fault, will influence the development of industry and agriculture advances, will bring huge property losses.Generator unit fault diagnosis is mainly based on the real into the monitoring, the operation of the equipment model and fault principle, observation after the failure phenomenon, determine the type of fault occurs, parts, nature and reason.

    Modern generating units of the depth of the fault diagnosis according to its diagnosis can be divided into preliminary diagnosis and further diagnosis.Preliminary diagnosis is based on the failure phenomenon, judge the fault causes the approximate scope of.Further diagnosis is based on the preliminary diagnosis results to analyze the cause of the problem, find, until find failure site.Adopted by the modern machine fault diagnosis according to the fault diagnosis method, can be divided into: intuitive diagnosis, using the diagnostic system, simple instrument diagnostic and special instrument, etc.

What is the generator intuitive diagnosis

Intuitive diagnosis is through the human sensory organs to look for fault phenomena, ask and listen, try, smell, touch, etc., to understand and master the characteristics of the fault phenomena, again carries on the analysis, judgment, conclusions diagnosis method.Direct diagnosis method based on user experience and user's familiar in the unit, in the range of use, there are great differences.The diagnosis of experienced users, can choose visual diagnostic method for the vast majority of malfunction that can occur in a crew, including the preliminary diagnosis and determine the specific fault accurate judgment.The main content of the intuitive diagnosis are:

See, that is, visual inspection.Its purpose is to know the electrical (electrical modulation) system of the unit type, type, before getting into more detailed testing and diagnosis, can eliminate some general the cause of the problem.Such as the unit model, the types of electric control system and manufacturing company, the production date to determine fault have very big help.Air filter to remove, check around filter for dirt, debris or other contaminants, replace when necessary, because the air filter clogging will influence the detection precision of air volume.Check whether the vacuum hose is aging, broken or crushed, and check the vacuum hose after the way and the connectors are in good condition.Check control system wiring harness connection status, such as sensors, actuators, electric equipment are in good condition, are the connection between the wire is loose or disconnected, wires have torn or line between short circuit phenomenon, electric connector plug and socket of the presence of corrosion phenomena and so on.Check whether there is any obvious damage on each sensor and actuator.Such as possible operation unit and check the inlet and exhaust manifold place whether there is a leak, etc.

Asked, in order to quickly find the source of trouble, you must first know what happens when a failure occurs, conditions, and how and whether have repair and fault such as the relevant circumstances and information.So we must listen to the unit using user description of failure phenomenon, although use the description of the user may be misunderstood or not comprehensive, also may be contradictory, but it often may bring up the crux of the problem.The best practice is that after listening to the preliminary opinions on the user's, think about the following a preliminary diagnosis, then ask some questions related to help determine the results of preliminary diagnosis or negative, seriously take notes at the same time, with a diagnostic test results form the basis of a malfunction.

Listen to, mainly to listen to the voice of the unit to work, presence of detonation, have without knocking, presence of stall, different in different parts of the job with or without abnormal noise, etc.This need long-term accumulation can accurate judgment.

Try, mainly according to the inspection, targeted commissioning, order into asynchronous define failure.

How to use the instrument to basic generator failure diagnosis

Using self-diagnosis system diagnosis and fault self-diagnosis system can be carried out on the system of fault self-diagnosis, in what is now the unit is a kind of simple and quick diagnosis method in diagnosis, but its diagnosis is the range of depth far cannot satisfy the requirement of fault diagnosis in practical use.Common unit operation is not normal and has nothing to do with the electronic control system fault., on the other hand, due to the limitations of self-diagnosis system, impossible to design a self-diagnosis system for its all possible failure can diagnose, therefore, give priority to with intuitive diagnosis method to inspect and judge of the work at any time for any system, is irreplaceable.

Using simple instrument diagnosis, using the simple diagnosis instrument, is to use a multimeter and oscilloscope as universal instrument, the electronic control unit (electrically controlled) fault diagnosis method, due to the electrical components (electrically controlled) have certain resistance value range, the operating range of output voltage and the output waveform, so use multimeter measuring element resistance and the output voltage, oscilloscope for testing components work output voltage waveform, guide connectivity is measured with a multimeter can determine components or circuit is normal.The characteristics of the method is that the diagnosis method is simple, low cost of equipment.Is mainly used for electronically controlled electrically controlled system and the fault diagnosis of electric devices, so this method can be used to fault further judgment.The disadvantage is that the operator of the demand is higher, in the use of simple instrument, the operator must be on the system structure and the circuit connection is quite a detailed understanding, to get satisfactory result of diagnosis.

Unit by using special diagnostic instrument, special diagnostic instrument according to the volume size is divided into: desktop computer analyzer, portable computer analyzer and pocket PC analyzer.The electronically controlled unit (electrically controlled) system fault analysis, the most widely used of the analyzer is a portable computer.General modern unit has a fault detection software, greatly improving the to the diagnosis of electronically controlled unit (electrically controlled) system efficiency.But the analyzer and analysis software of the high cost

Fault symptom simulation test method, the most difficult situation in fault diagnosis is defective, but no obvious fault symptoms.In this case, must make a thorough failure analysis, and simulated with the same or similar conditions and environment for fault.No matter how rich experience in maintenance personnel, technical proficiency, if the fault symptom is not verified conclusions, will ignore some important aspects in maintenance.For example, some problems under cold, crew under the hot hot, water spray, full load method, etc.

How the diagnosis method of data acquisition unit

LIXISE data collector is also called DAU cloud (cat), through RS232 and RS485, USB, the LINK, CAN wait for a variety of interface connected to the controller, acquisition controller on the generators of different operation parameters, and through the 2 g / 3 g, WIFi, cable, optical fiber transmission to the Internet, the cloud service system to management and analysis of the generating set parameters, then for health monitoring of generator set, fault analysis, fault diagnosis and maintenance on a regular basis.Really realize the generating set remote control, real-time monitoring of cloud service management.

Generator remote health diagnosis and fault diagnosis

Daily maintenance of generator is not enough, the generator of loss can't estimate, but also unable to obtain evidence generator really healthy, normal operation, will suddenly stop working, if you are need power unit occurrence this phenomenon does not work, then it will cause a delay of the transaction and influence.In the production of various fees, and over budget

LIXISE generators cloud service management system, and using force can be real-time monitoring of your unit, real-time diagnosis for health, the system will for your unit to carry on the scientific and effective diagnostic analysis, in the event of potential fail safe hidden trouble, the system is automatic alarm, to remind you where there is a need to maintain, will not cause unnecessary cost overruns.

The greatest degree and reduce the influence of fuel theft

Theft of fuel caused problem is more serious.In some areas, allegedly stolen generator fuel oil ratio as high as 40%

Completely avoid fuel theft may be difficult, because every time the number of stolen often few;Oil can be transported into or in the field of generator theft.However, you can use connection fuel sensor of the remote monitoring system, to ensure that when the filling transfer the correct amount of fuel.Using intelligent oil level sensor, can track the oil level in tank.Can be calibrated fuel sensor to induction fill up fuel tank, due to understand this information, we can confirm the tank filling is correct.Good performance of the oil level sensor to detect the 3-5 litres of fuel oil change.Can detect abnormal oil drop, indicating that fuel theft.The support alarm remote monitoring system, can instantly send notifications in case of theft.Even if it is difficult to catch the thief, at least we can clear the fuel theft and plans to replenish ourselves, to ensure that the generator has the required fuel operation.

The fuel oil level in the tank track can improve the attention to the fuel situation, help users understand when theft.Sometimes, organized theft is common, take this way can type and take steps to help detect the theft.

LIXISE generators cloud service management can monitor the change of your oil level measurement, also has the function of satellite positioning, in order to prevent the stolen, your unit fuel theft.

Remote testing start generator to reduce the start problem

As already parked cars, for a long time for a long time not running generator engine problems may start.For not always run backup generators, start to run the test on a regular basis is very important.Use has the control remote management solution, and connect the generator controller can carry out remote testing start.Just take simple operation, such as remote run the test, can be in power generators and need improve the possibility of generators

Cloud service management system, using LIXISE generator can remote unit start-stop, control your units at any time and place, not to open the generator of choose and employ persons, saves manpower and financial resources for the company.If the generator maintenance, the operation will be better, and low operating cost, because the unplanned services are usually expensive

Only when you need to start the service

Generator is usually according to the scheduled service plan.By understanding how generator running, can be more dynamic planning services.Because of the high cost of access to the site, therefore, through to the real need only service way of generator to send service team, can optimize service costs.

The challenge is to know when each site need service.Using the remote management solution, you can check the running time, oil pressure, battery state, coolant temperature, power output, fuel oil level, GPS location, etc.When reaches a critical level, can also generate notifications, for example, generator running time has exceeded expectations.LIXISE cloud service management system will automatically alarm, to alert you

LIXISE cloud service system can analyze the operation of each generator in the remote, you will be able to understand the health status and more effectively plan field service access.