CN104024611A

CN104024611A - Method and system for diagnosing a turbocharger

Info

Publication number: CN104024611A
Application number: CN201280053879.5A
Authority: CN
Inventors: P.L.弗林; B.D.沃尔登; M.J.马隆; M.卡鲁纳拉特恩
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 2011-10-31
Filing date: 2012-09-27
Publication date: 2014-09-03
Anticipated expiration: 2032-09-27
Also published as: CN104024611B; AU2016202396B2; EA029933B1; AU2016202396A1; AU2012333047A1; DE112012004549B4; JP2014530996A; WO2013066529A1; DE112012004549T5; JP5923615B2; EA201490687A1

Abstract

A method for monitoring the turbocharger based on the measured oil pressure value is disclosed. The method includes a step of receiving a signal indicative of a monitored pressure of a pressurized oil supply of a turbocharger (step 904); a step of determining a high frequency component of the signal (step 906); a step of determining whether the high frequency component of the signal meets one or more designated criteria (step 908); and if the high frequency component of the signal meets the one or more designated criteria, a step of generating a first control signal (step 916).

Description

For diagnosing the method and system of turbosupercharger

the cross reference of related application

The application requires the U.S. Provisional Patent Application the 61/553rd of submitting on October 31st, 2011, the rights and interests of No. 896, and be the U.S. Patent application the 13/234th of submitting on September 16th, 2011, the part continuation application of No. 517, the disclosure of each of above-mentioned application is all incorporated into the present invention by reference for all objects.

Technical field

The embodiment of the theme in the present invention relates to internal combustion engine system.Other embodiment relates to turbosupercharger.

Background technique

Turbosupercharger can in engine system, use to have additional supply of motor so that the pressure of the air of burning.In an example, turbosupercharger comprises the turbo machine in the exhaust passage that is connected in motor, described turbo machine via axle at least in part drive compression machine with increase suction pressure.Many turbosupercharger are used shaft bearing (journal bearings) to carry out supporting rotating shaft.These bearings are lubricated with compressed oil supply, and described compressed oil supply is by being used control valve or aperture to be adjusted to relative constant pressure.Conventionally, stablize oil pressure and monitor to ensure suitably lubrication and cooling of machine by pressure transducer (pressure transducer) and control system.

Along with the time changes, axle and/or shaft bearing or associated components may be worn.Finally, shaft bearing for example may be out of order.Conventionally,, due to this reason, the life-span of turbosupercharger is shorter than the remaining part of motor.And owing to being stored in the high level of the energy in turbosupercharger, its fault is normally catastrophic.This causes the hang-up of motor, and this can bring safety and cost consequence for the operator of system.

Summary of the invention

Therefore, in one embodiment, a kind of method comprises the signal of the monitoring pressure of the compressed oil supply that receives instruction turbosupercharger or other turbomachinery.Described method also comprises whether the high fdrequency component of determining signal meets one or more specified values.If the high fdrequency component of pressure meets one or more specified values, generate the first control signal.For example, described control signal can start the operator alarm relevant to the prediction health (or other serviceability) of turbosupercharger.

The healthy degeneration that can indicate described turbosupercharger of described prediction of described turbosupercharger.As an example, in the time that the bearing play of described turbo-charger shaft increases due to wearing and tearing, it is uneven that described turbo-charger shaft may become, and generates thus or increase the frequency of the described high fdrequency component of described signal.By monitoring the described high fdrequency component of described signal, can monitoring bearing healthy and can take appropriate measures to regulate described in whirlpool and take turns the described operation of pressurized machine and/or safeguard to prevent for example chance failure for described turbosupercharger provides.

Be to be understood that the concise and to the point description that provides above is the selection in order to introduce in simplified form the concept further describing in detailed description.Do not mean that key or the essential feature of determining claim theme, the scope of claim theme is limited uniquely by the claim of and then describing in detail.In addition, claim theme is not limited to solve in the above or in the implementation of any shortcoming described in any part of the present disclosure.

Brief description of the drawings

With reference to accompanying drawing, will understand better the present invention by the following description of reading indefiniteness embodiment, wherein below:

Fig. 1 shows the schematic diagram of the vehicle with turbosupercharger.

Fig. 2 shows the cross-sectional view of a part for turbosupercharger.

Fig. 3 flow for displaying figure, illustrates the method based on pressure measurement diagnosis turbosupercharger.

Fig. 4 flow for displaying figure, illustrates the method for the frequency content diagnosis turbosupercharger of working pressure signal.

Fig. 5 shows the figure of the frequency content of pressure signal.

Fig. 6 flow for displaying figure, illustrates the method based on pressure measurement diagnosis turbosupercharger.

Fig. 7 shows the cross-sectional view of a part for turbosupercharger.

Fig. 8 shows the figure that pressure comparison time signal is analyzed.

Fig. 9 flow for displaying figure, illustrates the method for the pressure measurement diagnosis turbosupercharger in the oil supply chamber based on turbosupercharger.

Embodiment

The various embodiments that relate to the method and system for diagnosing turbosupercharger are below described.An illustrative methods comprises the signal of the monitoring pressure of the compressed oil supply that receives instruction turbosupercharger or other turbomachinery (other turbomachine).Described method also comprises that whether the high fdrequency component (high frequency component) of determining signal meets one or more specified values, and if the high fdrequency component of pressure meets one or more specified values, generates the first control signal.In certain embodiments, method also comprises whether the amplitude of the variation of the baseline component (baseline component) of determining signal exceedes threshold quantity.If described baseline component variation exceedes described threshold quantity, generate the second control signal.The first and second control signals can be indicated the degeneration of turbosupercharger.For example, due to wearing and tearing, bearing play may increase and turbo-charger shaft may become uneven.Thereby the described high fdrequency component of described signal for example can increase, and the described baseline component of described signal can reduce.Therefore, by high frequency and the baseline component of monitoring pressure signal, can determine the degeneration of turbosupercharger, this will be described in greater detail below.

In one embodiment, turbosupercharger can be connected to the motor in vehicle.Locomotive system can be for being illustrated as one of type of the vehicle with the motor that turbosupercharger or multiple turbosupercharger can be attached to.Other type of vehicle can comprise road vehicle and other off highway vehicle, for example mining equiment and boats and ships.Other embodiments of the invention can be for being connected to the turbosupercharger of stationary engine.Motor can be diesel engine, or the combination of can burn another kind of fuel or fuel.Such alternative fuel can comprise gasoline, kerosene, biodiesel, rock gas and ethanol.Suitable motor can use ignition by compression and/or spark ignition.

Fig. 1 shows the Block Diagram of the exemplary embodiment of the Vehicular system 100 that is described as in the present invention rail vehicle 106 (for example, locomotive), and described rail vehicle 106 is configured to travel on track 102 via multiple wheels 112.As shown in the figure, rail vehicle 106 comprises have motor 104 engine system of (for example explosive motor).

The air inlet that motor 104 receives for burning from gas-entered passageway 114.Gas-entered passageway 114 receives the ambient air from air filter (not shown), and described air filter filters the outside air from rail vehicle 106.The exhaust being produced by the burning in motor 104 is fed to exhaust passage 116.Exhaust air flow is by exhaust passage 116, and the outlet pipe of outflow rail vehicle 106.

Engine system comprises the turbosupercharger 120 (" TURBO ") being arranged between gas-entered passageway 114 and exhaust passage 116.Turbosupercharger 120 increases be drawn into the charge of air (air charge) of the ambient air in gas-entered passageway 114 to provide larger charge density (charge density) to increase power stage and/or power operation efficiency between main combustion period.Turbosupercharger 120 can comprise the compressor (not showing in Fig. 1) being driven by turbo machine (not showing in Fig. 1) at least in part.Although show in this case single turbine pressurized machine, system can comprise multiple turbo machines and/or compressor stage.Below with reference to Fig. 2, turbosupercharger is described in more detail.

In certain embodiments, Vehicular system 100 can also comprise the exhaust-gas treatment system being connected in the upstream of turbosupercharger 120 or the exhaust passage in downstream.In one exemplary embodiment, exhaust-gas treatment system can comprise diesel oxidation catalyst (DOC) and diesel particulate filter (DPF).In other embodiments, exhaust-gas treatment system can additionally or alternatively comprise one or more emission control systems.Such emission control system can comprise selective catalytic reduction (SCR) catalyzer, three-way catalyst, NO _xcatcher or various other device or system.

Rail vehicle 106 also comprises that controller 148 is to control the various parts relevant to Vehicular system 100.In an example, controller 148 comprises computer controlled system.Controller 148 also comprises computer-readable recording medium (not shown), and described computer-readable recording medium comprises for allowing vehicle-mounted monitoring and controlling the code that rail vehicle operates.In the time monitoring the control and management of Vehicular system 100, controller 148 can be configured to receive signal from various engine sensors 150 (as further set forth in the present invention) to determine operating parameter and operational condition, and correspondingly regulates various engine actuators 152 to control the operation of rail vehicle 106.For example, controller 148 can receive the signal from various engine sensors 150, includes but not limited to engine speed, engine load, boost pressure, exhaust pressure, external pressure, delivery temperature, intake manifold air pressure (MAP) 154 etc.Correspondingly, controller 148 can such as, be controlled Vehicular system 100 by order being sent to various parts (traction motor, alternator, cylinder valve, closure etc.).In an example, controller 148 can responding engine crank box pressure be greater than threshold pressure and stops motor.

In one embodiment, as below, with reference to as described in figure 3, controller 148 can be configured to the signal of for example, multiple pressure transducers reception indicated pressures from being positioned at the various positions (the first and second diverse locations) in turbosupercharger.As an example, the first pressure transducer of output the first pressure signal can be positioned in the Seal cage of turbosupercharger and the second pressure transducer of output the second pressure signal can be positioned in the oil pocket of turbosupercharger.Controller can respond the degeneration that difference between the first pressure and the second pressure is greater than a threshold difference identification turbosupercharger.

Fig. 2 shows the view of the exemplary embodiment of the turbosupercharger 200 (for example, above with reference to the turbosupercharger 120 described in Fig. 1) that can be connected to motor.View shown in Fig. 2 is the cross-sectional view of a part for turbosupercharger 200.In an example, turbosupercharger 200 can be connected to motor by bolt.In another example, turbosupercharger 200 can be connected between the exhaust passage and gas-entered passageway of motor.In other example, turbosupercharger can be connected to motor by another suitable mode.

Turbosupercharger 200 comprises turbo machine 202 and compressor 204., and carry out self-purging transformation of energy and become rotation function with running shaft 206 through turbo machine 202 from the exhaust of motor, described axle is drive compression machine 204 again.In the time that environment air inlet is attracted by rotary compressor 204, environment air inlet compressed (for example, the pressure of air increases) makes the larger quality of air can be transported to the cylinder of motor.

In certain embodiments, turbo machine 202 and compressor 204 can have independent case, and for example bolt of described independent case links together, and make to form single unit (for example, turbosupercharger 200).As an example, turbo machine can have housing and the compressor manufactured by cast iron and can have the housing of being manufactured by aluminum alloy.In other example, the housing of turbo machine and compressor can be manufactured by same material.Be to be understood that turbine cylinder and compressor housing can be manufactured by any suitable material.

As shown in Figure 2, the Diffuser (diffuser) 228 that the first pressure transducer 232 is positioned in compressor housing is sentenced the pressure of measuring in compressor housing.Diffuser 228 is the bifurcated passages in compressor housing, its by speed transformation of energy precedent as pressure energy.Pressure transducer 232 can be for example transducer (transducer), and it depends on that institute's applied pressure generates signal.The pressure at Diffuser 228 places can be substantially equal to intake manifold air pressure (MAP).For example, locate at the 8th recess (notch) of some engine systems, the first pressure transducer 232 can be measured the pressure of about 45psig (about 3 bar).

Turbosupercharger 200 also comprises that bearing 208 is with back shaft 206, and axle can be rotated with the friction reducing under high speed.Turbosupercharger can also comprise that lubrication system for example, to reduce the degeneration of bearing and the temperature of maintenance bearing (, maintenance bearing is cooling).When motor is in the time operating, the constant flow of engine oil or engine coolant can be passed for example turbosupercharger.In an example, pressurization engine oil can enter turbosupercharger via oil-in (not shown).Excessive oil can be collected in oil pocket 212, and oil is by leaving turbosupercharger 200 with the outlet (not shown) of oil pocket 212 fluid couplings.As shown in Figure 2, oil pocket pressure transducer 230 is positioned in oil pocket 212 to measure the pressure in oil pocket.Oil pocket pressure transducer 230 can be used as the additional of the first pressure transducer 232, or it can be used as substituting of the first pressure transducer.Oil pocket pressure transducer 230 can be for example transducer, and it depends on that institute's applied pressure generates signal.

As shown in Figure 2, turbosupercharger 200 (for example also comprises two non-contact Sealings, mazy type (labyrinth) Sealing), be positioned at the turbo machine labyrinth 216 between oil pocket 212 and turbo machine 202 and be positioned at oil pocket 212 and compressor 204 between compressor labyrinth 218.In the time using in the present invention, labyrinth represents to provide bending or zigzag path to help prevent the mechanical sealing element of a type of leakage.(for example contrary with O shape circle or similar rounded seal).In one embodiment, labyrinth can be made up of the many grooves or the screw thread that are pressed against tightly on another parts.In the present invention, labyrinth is applied to running shaft system, between the tip of mazy type screw thread and running surface, has little gap.With which, labyrinth passes through to provide non-contact seal action by what control fluid.Labyrinth 216 and 218 therefore for example can be by providing distortion, crooked route to reduce to leak into turbo machine 202 and compressor 204 for the engine oil of lubricating bearings 208.Because labyrinth 216 and 218 is non-contact Sealings, therefore can reduce around the friction of bearing 208 and axle 206, also reduce oil simultaneously and leak.In an example, labyrinth 216 and 218 can with bearing 208 interval intended distances.Can reference example determine suitable definite distance as the special parameters in the scope of about 1/4000 (approximately 6x10-4cm) that is less than an inch.

Turbosupercharger 200 also comprises Seal cage 234, and described Seal cage 234 is from the region that extends to close turbo machine labyrinth 216 below of the compressor 204 near compressor labyrinth 218.Seal cage 234 is the air passagewayss in the housing of turbosupercharger 200.As shown in Figure 2, Seal cage 234 comprises aperture 236.Aperture 236 is configured to generate chokes air-flow (choked air flow).In such structure, chokes air-flow can generate larger pressure difference in farther downstream, causes the better detection of the difference of the pressure between the various positions in turbosupercharger 200.Seal cage 234 also comprises that the second pressure transducer 238 is to measure the pressure in Seal cage 234.As shown in Figure 2, the second pressure transducer 238 is positioned at the port of Seal cage 234.The second pressure transducer 238 can be for example transducer, and it depends on that institute's applied pressure generates signal.Pressure in Seal cage 234 can, higher than the pressure in oil pocket 212 for example, can remain in oil pocket oil.As an example, in the 8th indent of some engine system, pressure transducer 238 can be measured the pressure of about 27psig (about 2 bar).

Each pressure transducer position can have different pressures.For example, the pressure at Diffuser 228 places in compressor housing can be higher than the pressure in Seal cage 234, and pressure in Seal cage 234 can be higher than the pressure in oil pocket 212.In addition, the difference between each pressure can such as, change along with operational condition (recess setting, ambient temperature and/or the pressure etc. of turbo machine or compressor speed, motor).When the degeneration of turbo machine labyrinth 216 and/or compressor labyrinth 218 rubs Sealing while occurring because rotor unbalance or axial displacement cause axle 206, pressure in Seal cage 234 can reduce, and that the pressure at Diffuser 228 places in compressor housing keeps is roughly the same.Thereby the pressure difference between the pressure that pressure that can be based on measuring in Seal cage 234 and Diffuser in compressor housing 228 places are measured is greater than the degeneration of corresponding threshold difference diagnosis labyrinth 216 and 218.

In one embodiment, system comprises the turbosupercharger with compressor and turbo machine, generates the first pressure transducer of first signal, and generates the second pressure transducer of secondary signal.The first pressure transducer is arranged in the oil pocket of turbosupercharger, and the second pressure transducer is arranged in the Seal cage of turbosupercharger.System also comprises controller, is greater than the poor degeneration of identifying turbosupercharger of first threshold and if described controller is configured to identification from the first pressure of first signal with from the difference between second pressure the first pressure and second pressure of secondary signal.In an embodiment, the degeneration of identification turbosupercharger comprises that output example is as the control signal for starting alarm or warning or control Vehicular system.

In certain embodiments, the upgrading external member that can be arranged in rail vehicle or other vehicle can comprise nonvolatile computer-readable medium, and it comprises that the described above force value based on measuring in turbosupercharger determines the instruction of the degeneration of turbosupercharger.Upgrading external member can also comprise multiple pressure transducers or other mechanical component that can be arranged in turbo-charger sytem.

Fig. 3, Fig. 4 and Fig. 6 flow for displaying figure, illustrating can be comprising the illustrative methods of carrying out in the Vehicular system of the turbosupercharger that is connected to motor.Fig. 3 shows the method for diagnosing the degeneration of the non-contact Sealing of arranging around turbo-charger shaft based on the measure differences in pressure in turbosupercharger.Fig. 4 shows the frequency content diagnosis turbo machine of turbosupercharger of the measuring pressure based in turbosupercharger or the method for the degeneration of compressor.Fig. 6 shows the method for diagnosing the degeneration of the non-contact Sealing of arranging around turbo-charger shaft based on the measuring pressure in turbosupercharger.Can carry out by identical controller and for example with reference to the method described in figure 3, Fig. 4 and Fig. 6 simultaneously.As an example, the second pressure can be measured with the first pressure ratio, the frequency content of the second pressure (frequency content) also can be determined, and the first and/or second pressure can with corresponding threshold pressure comparison.In addition, when the motor connecting when turbosupercharger is operating (for example, when burning is while occurring) can carry out with reference to the method described in figure 3, Fig. 4 and Fig. 6, and the vehicle being positioned at wherein when turbosupercharger can be carried out described method just in motion.

In one exemplary embodiment, a kind of method comprises the first pressure of determining the primary importance place in turbosupercharger, determines second pressure at the second place place in turbosupercharger, and determines the frequency content of the second pressure.Method also comprises the situation (condition) of the frequency content diagnosis turbosupercharger of difference based between the first pressure and the second pressure and the second pressure.

Referring to Fig. 3, show the method 300 that is used for the situation of diagnosing turbosupercharger (for example, above with reference to the turbosupercharger 200 described in Fig. 2).Particularly, method comprises via being positioned at the pressure transducer measuring pressure of the various positions in turbosupercharger and comparing and measuring force value.For example, primary importance place measure the first pressure with second place place measure the second pressure ratio.Difference based on measured pressure value is determined the degeneration of turbosupercharger.As mentioned above, the motor connecting when turbosupercharger is manner of execution in the time of operation, and the vehicle (for example rail vehicle) being positioned at wherein when turbosupercharger just in motion can manner of execution.With which, the pressure difference between the various chambeies of turbosupercharger can be large enough to be enough to measure.

In step 302, determine system operational condition (operating conditions).Operational condition can comprise that boost pressure, external pressure, ambient temperature, motor recess arrange etc.

Once determine operational condition, method enters step 304, wherein measures the first pressure at primary importance place.As mentioned above, turbosupercharger can have multiple pressure transducers of the various positions in the turbosupercharger of being positioned at.Thereby the first pressure can be measured by being arranged in the first pressure transducer of oil pocket, the pressure transducer at Diffuser place that is arranged in compressor housing or the pressure transducer that is arranged in Seal cage.In other embodiments, can measure the first pressure in another correct position place in turbosupercharger.

At step 306 place, measure the second pressure at second place place.The second place can be the position that is different from primary importance.For example, the first pressure can be measured by the second pressure transducer in Seal cage by the first pressure transducer measurement and the second pressure in oil pocket.As another example, the first pressure can be measured by the second pressure transducer of Seal cage by the first pressure transducer measurement and second pressure at the Diffuser place that is arranged in compressor housing.In other embodiments, can measure the second pressure in another correct position place in turbosupercharger.

Once determine the first pressure and the second pressure, judge in step 308 whether the difference between the first pressure and the second pressure is greater than threshold difference.Assess the specified threshold difference that the first and second pressure contrast and can depend on the sense position of the first and second pressure in turbosupercharger, different position groupings has different threshold difference.For example, threshold difference (if measuring the first and second pressure in these positions) between pressure in pressure and oil pocket in Seal cage can be that first threshold is poor, and threshold difference (if measuring the first and second pressure in these positions) between the pressure at Diffuser place in pressure and compressor housing in Seal cage can be that Second Threshold is poor.First threshold is poor can be had and be different from the poor value of Second Threshold, and reason is that each of measuring pressure can have different value under normal operating conditions.As an example, for example, under the normal operating conditions of turbosupercharger health (, do not degenerate), the first pressure in oil pocket can have particular value and the second pressure of measuring in Seal cage can have higher value and makes oil pocket keep oil.In addition the pressure of measuring in Seal cage, can for example, along with operational condition (motor recess, engine speed, ambient temperature, external pressure, engine oil temperature, engineer coolant temperature, fuel spray into angle, inflation pressure, turbocharger speed and/or gas-filling temperature) and is changed.For example, Seal cage can have more high pressure (for example, in the 8th indent than the 4th indent) in high-engine indent more.Similarly, threshold difference can such as, change based on operational condition (compressor speed, engine load, motor recess etc.).For example, in the time that the speed of compressor reduces, Seal cage pressure also can reduce, and causes the pressure difference that reduces between Seal cage and oil pocket.Thereby for the pressure of these positions of turbosupercharger degradation assessment about possible, the threshold difference between Seal cage and oil pocket can correspondingly reduce to make not identify mistakenly the degeneration of turbosupercharger.

As another example, under the normal operating conditions of turbosupercharger health, first pressure at the Diffuser place in compressor housing can have the second pressure that is similar to the value of Manifold Air Pressure and measure in Seal cage can have lower value.The pressure of measuring in Diffuser place in compressor housing and Seal cage can change along with operational condition, the setting of for example motor recess and turbocharger speed.For example, the pressure that the Diffuser place in Seal cage is measured can increase along with motor recess (for example, pressure is higher in the 6th indent at the 7th indent ratio).

Difference between the first pressure and the second pressure under various operational conditions for example can be stored in look-up table.In the time that the absolute value of the pressure difference between the first and second pressure exceedes threshold value, indicate the degeneration of turbosupercharger in step 310.In an example, in the time that the difference between the first pressure and the second pressure is greater than threshold value, can diagnose the degeneration of non-contact Sealing (for example turbo machine or compressor labyrinth).(in order to realize the diagnosis of the type, sensor can be placed on the various positions in turbosupercharger, such as, Diffuser place in oil pocket, Seal cage, compressor housing etc.).For example, due to rotor unbalance or axial displacement, the running shaft of turbosupercharger can rub on non-contact labyrinth Sealing, generates thus around the gap of non-contact labyrinth Sealing and the air-flow of increase arrival crank box, causes reducing of crank box overvoltage and Seal cage pressure.Therefore, in the time that Seal cage pressure reduces, the poor variation between the pressure at the Diffuser place in poor variation and Seal cage pressure and compressor housing between Seal cage pressure and oil pocket pressure.

For look-up table, look-up table will comprise the list of (classification, type or the configuration of motor, vehicle or other system) assigned operation condition, and for each operational condition, for example, empirically determine the correlation threshold of pressure difference.In operation, (described motor or vehicle or other system) current operation pattern by with table the cross reference of corresponding operating condition so that retrieval correlation threshold.Pressure difference (between the first and second pressure sensors in turbosupercharger poor) then will with retrieval threshold comparison so that assessment turbosupercharger health.

Controller for example can be configured to by send diagnostic code lighting via the fault indicating lamp (MIL) of operator interface Display panel, diagnostic code is sent to motor that the notices such as central dispatching control centre diagnose and is positioned at the operator of vehicle (or other system) wherein.Response receives diagnostic signal, and turbocharger operation can be suspended, for example, make can not occur the further degeneration of engine system and/or turbo-charger sytem.Once engine stop, turbosupercharger can be removed and places under repair or change from vehicle.In other example, the turbosupercharger that power operation and/or turbocharger operation can be conditioned to compensate degeneration is until engine stop.In other other example, when receive instruction turbosupercharger degeneration occurred diagnostic code time motor can stop, making to reduce the further degeneration of turbo-charger sytem and/or engine system.

On the other hand, if the difference between the first pressure and the second pressure is less than threshold difference, method enters step 312, wherein indicates turbosupercharger do not degenerate (or in certain embodiments, not taking measures).

With which, when turbosupercharger can be diagnosed the degraded condition (degraded condition) of turbosupercharger in when operation.For example, because the pressure difference between the first and second pressure is greater than threshold difference, the degeneration of the turbosupercharger for example, causing due to the leakage of one or more non-contact Sealings (compressor and turbo machine labyrinth) can be identified.Be on duty while being not more than threshold difference, can indicate base chamber over-voltage events may be due to the situation except turbosupercharger is degenerated, and for example piston ring is degenerated or certain other source.

Fig. 4 is flow chart, frequency content diagnosis turbosupercharger based on pressure signal is shown, for example, above with reference to the method 400 of the situation of the turbosupercharger 200 described in Fig. 2.Particularly, method comprises that the pressure of measuring from the position in turbosupercharger determines frequency content.Based on frequency content, the degeneration of identification turbo machine or compressor.As mentioned above, the motor connecting when turbosupercharger is manner of execution in the time of operation, and the vehicle (for example rail vehicle) being positioned at wherein when turbosupercharger just in motion can manner of execution.For example, due to the rotation based on turbine fan or compressor fan via the definite frequency content of method, therefore turbosupercharger is fed to motor by supercharging during power operation.

In step 402, determine system operational condition.Operational condition can comprise the turbo machine of boost pressure, turbosupercharger and/or the speed of compressor, external pressure, ambient temperature etc.

In step 404, the position measuring pressure in turbosupercharger.As mentioned above, pressure transducer can be arranged in the multiple positions in turbosupercharger, and thereby, Diffuser place that can be in Seal cage, in oil pocket, in compressor housing and/or another correct position place measuring pressure in turbosupercharger.

Once record pressure (or multiple pressure), determine the frequency content of pressure signal in step 406.For example, because the degeneration of turbo machine or compressor blade may be the most obvious in Seal cage pressure, therefore can determine the frequency content of the pressure of measuring in Seal cage.The frequency content of pressure be frequency domain pressure signal frequency component relative amplitude and/or be with band-pass filter produce measuring frequency content.In an example, can and related algorithm be applied to signal by filtering signal, sampled signal, switching signal and determine frequency content.

In one exemplary embodiment, pressure signal can be by the low-pass filter filtering with the cutoff frequency that is slightly larger than fundamental frequency.For example, cutoff frequency can be than fundamental frequency large 10 to 20.Thereby cutoff frequency can be determined by the speed of turbo machine or compressor.Fundamental frequency component can be owing to the rotation of turbo machine or compressor fan.For example, in a revolution of compressor fan, eight fan blade can be passed through specified point.Therefore, the rotation of compressor fan can cause the pressure wave of the inside of crank box, and the frequency that described pressure wave has is corresponding to quantity and the fan revolution frequency of fan blade.

In addition, can be to be more than or equal to the frequency sampling pressure of Nyquist (Nyquist) speed.In one embodiment, can be to be greater than the frequency sampling pressure signal of twice of turbo machine or compressor fundamental frequency.In one embodiment, can be to be greater than the frequency sampling pressure signal of twice of turbo machine or compressor peak frequency.Therefore,, by bandpass filtering and to be more than or equal to the frequency sampling of nyquist rate, the frequency content of pressure is aliasing (not be aliased) not.Once pressure is sampled, pressure can be converted.For example, sampled pressure can be converted to generate frequency domain pressure signal.In an example, FFT can be for generating frequency domain pressure signal.Then, can apply related algorithm.In an example, can apply related algorithm to compare the signal (signature) of frequency domain pressure signal, the frequency content of for example pressure and the situation of turbosupercharger.For example, the signal of healthy turbosupercharger can comprise the frequency content under fundamental frequency.

In step 408, determine the centre/mean value (mean/average values) of frequency.Mean value can use to diagnose turbosupercharger to degenerate together with frequency content.For example, in the mean value of measuring and frequency content, exist and can indicate bearing and non-contact Sealing fault higher than the pressure pulse of assign thresholds in oil pocket, this can cause inflation to flow to base chamber, causes crank box over-voltage events.

Once frequency content is determined, determines whether and fault detected in step 410.As an example, pressure also can be included in other harmonic wave of fundamental frequency, such as, frequency content under second order frequency (doubled frequency), three order frequencies (treble frequency) etc.Similarly, crank box pressure can be included in the frequency that is less than fundamental frequency, for example, frequency content under half order frequency (half frequency).Fault can be indicated by the harmonic wave of fundamental frequency, and for example, half order frequency that is greater than threshold value can indicate fan blade to break.Therefore, if the fault of detecting, method enters step 412, wherein indicates the degeneration of turbosupercharger.As mentioned above, in the time that identification is degenerated, controller can send diagnostic code to light the fault indicating lamp (MIL) via operator interface Display panel, and diagnostic code is sent to central dispatching control centre etc.

On the other hand, if fault do not detected in step 408, method enters step 412 and instruction turbosupercharger do not degenerate (or in other embodiments, not taking measures).

Fig. 5 shows the figure 500 of the example frequency content of pressure signal.502 places under threshold value 504 show fundamental frequency.As mentioned above, fundamental frequency component can be owing to the rotation of turbo machine or compressor fan.If fundamental frequency is under threshold value 504, this can indicate balance or healthy turbo machine or compressor fan.If turbo machine or compressor be because for example fan blade is broken and uneven, the amplitude of fundamental frequency can increase and makes it higher than threshold value 504.Threshold value 504 can such as, based on various operational condition (fan speed, engine load, the setting of motor recess, ambient temperature, external pressure, engine oil temperature, engineer coolant temperature, fuel spray into angle, inflation pressure, turbocharger speed, gas-filling temperature etc.) and is changed.For example, higher fan speed (for example, fan sooner rotation) can have the fundamental frequency with by a larger margin.Thereby threshold value 504 can increase along with fan speed.With which, the degeneration of compressor or turbosupercharger fan can be identified.

Therefore, can determine the frequency content of measured pressure signal.By analyzing the frequency content of pressure signal, the situation that the compressor causing such as breaking due to for example fan blade or turbo machine are degenerated can be diagnosed.Thereby, the more specifically diagnosis that can provide turbosupercharger to degenerate.

Fig. 6 shows for diagnosing turbosupercharger, for example, above with reference to the method 600 of the condition of the turbosupercharger 200 described in Fig. 2.Particularly, method comprises that use is positioned at the pressure transducer measuring pressure of the various positions in turbosupercharger, and compares (multiple) measured pressure value and (multiple) corresponding threshold pressure.For example, the first pressure of measuring at primary importance place and first threshold pressure ratio are.Drop to the degeneration of determining turbosupercharger under first threshold pressure based on the first pressure.As mentioned above, the motor connecting when turbosupercharger in the time of operation and (possibility) for example, carry out just in motion described method when the vehicle (rail vehicle) that turbosupercharger is positioned at wherein.

In step 602, determine operational condition.Operational condition can comprise that boost pressure, external pressure, ambient temperature, motor recess arrange etc.

In step 604, measure the pressure of the position in turbosupercharger.As mentioned above, pressure transducer can be arranged in the various positions in turbosupercharger, for example the Diffuser place in compressor housing, in Seal cage, medium at oil pocket.In some instances, can determine pressure in the position in the intake manifold of for example motor.In some instances, can be more than one position measuring pressure.For example, can be in oil pocket and Seal cage measuring pressure, or can be in oil pocket and/or Seal cage measuring pressure.

Once pressure is measured, judge in step 606 whether measuring pressure has exceeded threshold pressure.For example, if one of non-contact compressor labyrinth and turbo machine labyrinth or both degenerate, the pressure in oil pocket can increase and pressure can exceed threshold pressure.As another example, if one of non-contact Sealing or both degenerate, the pressure in Seal cage can reduce and pressure can drop under threshold pressure.In some instances, pressure can be in multiple positions measured and with corresponding threshold value comparison.For example, measured and the second pressure in the first pressure can be in oil pocket primary importance place can be in compressor housing the second place at Diffuser place measured., and the Second Threshold pressure ratio of the second pressure and the threshold pressure corresponding to Diffuser for the first pressure and first threshold pressure ratio corresponding to the threshold pressure of oil pocket.If both exceed their respective threshold the first and second pressure, can indicate degeneration.Be to be understood that threshold pressure can change based on engine operating condition.For example, threshold pressure and measuring pressure can be along with engine speed, engine load, ambient temperature, external pressure, engine oil temperature, engineer coolant temperature, fuel spray into angle, inflation pressure, turbocharger speed, gas-filling temperature etc. and change.

If determine that measuring pressure does not exceed threshold pressure, indicate turbosupercharger not degenerate in step 610.Alternatively, can not take measures in certain embodiments.On the other hand, if determine that measuring pressure has exceeded threshold pressure, indicate turbosupercharger to degenerate in step 608.As mentioned above, in the time that identification is degenerated, controller can send diagnostic code to light the fault indicating lamp (MIL) via operator interface Display panel, and diagnostic code is sent to central dispatching control centre etc.

With which, when turbosupercharger can be diagnosed the degraded condition of turbosupercharger in when operation.For example, in the time that exceeding corresponding threshold pressure, the one or more measuring pressures in turbosupercharger can identify the degeneration of the turbosupercharger for example, causing due to the leakage in one or more non-contact Sealings (compressor and turbo machine labyrinth).In the time that measuring pressure does not exceed threshold pressure, can indicate base chamber over-voltage events may be due to the situation except turbosupercharger is degenerated, and for example piston ring is degenerated or certain other source.

The frequency content of one of the pressure difference recording that in certain embodiments, the degeneration of turbosupercharger can be based in turbosupercharger, pressure signal and the comparison of the pressure recording and threshold pressure.As an example, only have and in the time that pressure difference is greater than threshold difference, just can determine frequency content, and only have and in the time that the pressure recording has exceeded threshold pressure, just can determine pressure difference.

In an embodiment, depend on that motor/system operation modes is empirically identified for assessing the parameter of turbosupercharger health or condition (for example, pressure threshold).For the motor/system of appointment, in the time that known engine/system is worked best, for the pressure in the turbosupercharger of various operator scheme measuring systems.For example, motor/system can be test model, new model, nearest Maintenance Model etc.The position of measuring pressure (can described in the other parts of this specification).Then force value is stored and for assessment of the turbosupercharger health in the motor/system of same or similar type.In another embodiment, force value is measured and average or process in other mode to determine the set of the stowed value using in the motor/system of the same or similar type of assessment in some unit of the motor/system of same type (known work best).In another embodiment, dispose in place so that in normal and motor/system of continuing to use, but be new and/or be considered in addition the time measurement force value of working best in motor/system.Force value is stored and is then referenced between the lasting spreadable life of motor/system, for the assessment in future of turbosupercharger health.In another form of such embodiment, if the force value (in newly deployed motor/system) of initial sensing belongs in the error threshold of test value of the motor/system of same or similar type, they are only for assessing future.Therefore, if initial sensing value (comparison), away from desired value, based on specification error threshold value or in other mode, generates alarm or warning to notify operator's some problem of possibility or take similar remedial measure." motor/system " represents motor, engine system, has vehicle or other system etc. of engine system.

Another embodiment relates to a kind of method, and described method comprises the step of the first pressure of determining the primary importance place in turbosupercharger, and the step of second pressure at second place place in definite turbosupercharger.Method also comprises the step of the control signal of the condition based on the first pressure and the instruction of the second Output pressure or response turbosupercharger.

In another embodiment of method, described method comprises the first pressure of determining the primary importance place in turbosupercharger, determines second pressure at the second place place in turbosupercharger, and determines the frequency content of the first and second pressure.Described method also comprises the frequency content output instruction based on the first pressure, the second pressure and the second pressure or responds the control signal of the condition of turbosupercharger.

Another embodiment relates to a kind of system, and described system comprises the turbosupercharger with compressor and turbo machine.Turbosupercharger is connected to the motor in vehicle.System also comprises the first pressure transducer, the second pressure transducer and controller.The first pressure transducer is arranged in the oil pocket of turbosupercharger and is configured to generate first signal.The second pressure transducer is arranged in the Seal cage of turbosupercharger and is configured to generate secondary signal.Controller is configured to identification from the first pressure of first signal with from the second pressure of secondary signal, and determines the state of turbosupercharger based on the first and second pressure.For example, controller can be configured to determine based on the first and second pressure the health status of turbosupercharger.The health status of turbosupercharger for example can reflect the required time lag between housekeeping operation and/or replacing.Therefore the improvement of the health status of turbosupercharger, if the health status of turbosupercharger is degenerated, may need more continually housekeeping operation, and if may need housekeeping operation not too continually.As another example, controller can be configured to for example, judge based on poor (poor be greater than assign thresholds poor) between the first pressure and the second pressure whether turbosupercharger degenerates (for example, reach need safeguard degree).

Another embodiment relates to a kind of system, and described system comprises that the first pressure transducer that is configured to the primary importance from being arranged in turbosupercharger receives the control module of the first pressure signal.Control module is also configured to receive the second pressure signal from the second pressure transducer of the second place of turbosupercharger.(the first and second positions can as local in other in this specification as described in).Control module is also configured to based on the first pressure signal and the second pressure signal output control signal.For example, control module can be configured to assess may degenerating of turbosupercharger based on the first and second pressure signals, and the degeneration output control signal of turbosupercharger is determined in response.Control signal can or be configured to control this system (for example, operator interface, alarm) so that instruction is degenerated through format, or control signal can be degenerated with explanation for controlling vehicle trailer system.Control module can be hardware and/or software module, means that it can comprise: interconnection electronic unit, and it is configured to carry out one or more appointed functions (for example, receive input signal, and generate output/control signal based on input signal); And/or be stored in the software in non-interim media/medium, represent one or more set of electronically readable instruction, in the time being read and carried out by electronic equipment (group of interconnection electronic unit), it causes electronic equipment to carry out one or more functions according to the content of instruction.

In another embodiment, control module is configured to determine pressure difference based on the first pressure signal and the second pressure signal, and judges whether pressure difference meets one or more specified values.If pressure difference meets one or more specified values, control module is configured to output instruction degeneration turbosupercharger situation or relative control signal.One or more specified values depend on that the position of measuring pressure is determined in advance, and the degraded condition of instruction turbosupercharger.For example, depend on operator scheme, healthy turbosupercharger can have the first pressure difference between two points conventionally.One or more standards comprise that departing from the first pressure difference (being less than or greater than pressure difference) exceedes threshold value.As another example, one or more standards can comprise that departing from the first pressure difference exceedes threshold value, and described threshold value only reflects larger pressure difference, or only reflect less pressure difference.That is to say, if pressure difference is generally " X ", only has in one embodiment in the time exceeding X and reach threshold value and just meet standard, and in another embodiment, only have when pressure sensor is poor and just meet standard while reaching threshold value lower than X.Selected standard will depend on the position of particular turbocharger and measuring pressure.

In another embodiment, control module is configured to carry out one of first and second pressure signals or both frequency analyses, and (at least in part) exports control signal based on frequency analysis.

In one embodiment, as below with reference to as described in figure 7-Fig. 9, controller 148 (described in Fig. 1) can be configured to for example, receive from the oil pressure sensor associated with turbosupercharger (transducer) signal of instruction turbosupercharger oil pressure, and via the one or more definite bearing fault in frequency content and the baseline content of pressure signal.The frequency content (the various harmonic waves of for example pressure signal) of the pressure signal of various position measurements that as described above with reference to Figure 4, can be based in turbosupercharger determines that bearing and/or non-contact Sealing degenerate.As described in more detail below, the high fdrequency component that the other method of the degeneration based on frequency content identification turbo-charger bearing can be based on pressure signal and/or the baseline component of pressure signal, wherein pressure is measured in the compressed oil supply of turbosupercharger.

Fig. 7 shows can be connected to the turbosupercharger 700 of motor, for example, above with reference to the view of the exemplary embodiment of the turbosupercharger 120 described in Fig. 1.View shown in Fig. 7 is the cross-sectional view of a part for turbosupercharger 700.In an example, turbosupercharger 700 can be connected to motor by bolt.In another example, turbosupercharger 700 can be connected between the exhaust passage and gas-entered passageway of motor.In other example, turbosupercharger can be connected to motor by another suitable mode.

Turbosupercharger 700 comprises turbo machine 702 and compressor 2704., and carry out self-purging transformation of energy and become rotation function with running shaft 206 through turbo machine 702 from the exhaust of motor, described axle is drive compression machine 704 again.In the time that environment air inlet is inhaled into by rotary compressor 704, environment air inlet compressed (for example, the pressure of air increases) makes the larger quality of air can be transported to the cylinder of motor.

In certain embodiments, turbo machine 702 and compressor 704 can have independent case, and for example bolt of described independent case links together, and make to form single unit (for example, turbosupercharger 700).As an example, turbo machine can have housing and the compressor manufactured by cast iron and can have the housing of being manufactured by aluminum alloy.In other example, the housing of turbo machine and compressor can be manufactured by same material.Be to be understood that turbine cylinder and compressor housing can be manufactured by any suitable material.

Turbosupercharger 700 also comprises that shaft bearing 708,710 is with back shaft 706, and axle can be rotated with the friction reducing under high speed.708 instructions for bearing of compressor, and 710 instructions for turbine bearing(s).Turbosupercharger can also comprise that lubrication system for example, to reduce the degeneration of bearing and the temperature of maintenance bearing (, maintenance bearing is cooling).When motor is in the time operating, the constant flow of engine oil or engine coolant can be passed for example turbosupercharger.In an example, pressurization engine oil can enter turbosupercharger via oil-in 712.Oil pressure sensor 714 (for example, transducer) is operationally arranged with respect to oil-in.For example, oil pressure sensor 714 can be arranged in compressed oil supply.In operation, oil pressure sensor 714 generates the signal 716 of the instruction oily pressure associated with shaft bearing.Signal 716 can be fed to for example controller 148.

In the operation period of turbosupercharger, oil is supplied to turbosupercharger by oil pump etc. from engine oil supply.After engine start, supply pressure reaches steady-state value 800, as shown in Figure 8.The oily pressure that is fed to turbosupercharger will be slightly low, but after engine start, also reach baseline pressure 802.(" baseline " represents steady state pressure, for example only there is lower frequency and change, and/or with new turbosupercharger or other known nominal turbosupercharger oil pressure after the associated engine start of the turbosupercharger that operates).

The high frequency content of in an embodiment of the present invention, monitoring oily supply pressure is to predict destructive axle motion and progressive bearing fault.For such object, also can monitor baseline turbosupercharger oil pressure.In the time of spindle balance and bearing normal running, the oil pressure in turbosupercharger will be stablized and be measurable.In the time that axle vibrates due to imbalance or bearing wear, the pressure signal of upper frequency will be detected by pressure transducer.Baseline pressure and high-frequency signal can together with predict the health of axle and bearing.This health status can notify the life expectancy of turbosupercharger to take appropriate measures to operator.

For further explanation, in the time that the turbosupercharger shaft bearing of suitable design operates with normal mode, uneven and bearing rotary power is no more than the gravity load on bearing.Due to high-speed (rpm) associated with turbo-charger shaft with compared with light load, design bearing becomes back shaft on the zone of dispersion that is called as pad.Axle is runs steadily in pad.This stable axis operation is not got back to pressure transducer by any high frequency pressure waves transmission.In the time that rotor shaft unbalanced force is high enough to axle to be pushed to outside settling position, axle will rotate in bearing, cause the quick variation of bearing play.Axle will clash into bearing, cause high frequency pressure waves.Pressure wave from these destructive motions will back transmit and can be detected by oil pressure sensor along oil supply.If allow these destructive motions to continue some times, wear and tear and be out of shape and may in bearing, occur, this can cause excessive bearing play.The bearing play increasing can reduce the baseline pressure by oil pressure transducer sensing.The reducing of bearing play will make axle motion more strengthen, and cause bearing fault.

In an embodiment, with reference to figure 7 and Fig. 8, method comprises the signal 716 of the monitoring pressure of the compressed oil supply that receives instruction turbosupercharger 700 or another turbomachinery.Method also comprises whether the high fdrequency component 804 of determining signal meets one or more specified values.If the high fdrequency component of pressure meets one or more specified values, generate the first control signal 806.For example, control signal can start the operator alarm relevant to the prediction health (or other serviceability) of turbosupercharger.

In another embodiment, method also comprises the baseline component 802 of monitor signal.If the amplitude of the variation of baseline component exceedes threshold quantity, method also comprises generation the second control signal 808.In a specific examples, when have downward trend in generation the second control signal time, method can determine whether the amplitude of variation is greater than threshold value, and in another example, when have uptrending in generation the second control signal time, method can determine whether the amplitude of variation is greater than threshold value.

In another embodiment, method comprises the signal 716 of the monitoring pressure of the compressed oil supply that receives instruction turbosupercharger 700 or another turbomachinery.Method also comprises the first assessment of the high fdrequency component 804 of carrying out signal, and carries out the second assessment of the baseline component 802 of signal.Based on the first and second assessments, generate the control signal of the predicted operating condition of instruction turbosupercharger.The first assessment can comprise determining whether the high fdrequency component of signal meets one or more specified values, and the second assessment can comprise whether the amplitude of the variation of the baseline component of determining signal is greater than threshold quantity (and upwards or downwards trend).

The amplitude of determining the variation of baseline component 802 whether be greater than threshold quantity (that is to say, baseline component be downwards or uptrending) can comprise: along with the data of time storage baseline component; And the previous value of comparison base component and currency (or the multiple successor value that record after previous value).In an example, if currency (or successor value) for example, lower than previous value (low go out at least threshold quantity), baseline component can be confirmed as having downward trend.In another example, if currency (or successor value) for example, higher than being previously worth (, exceeding at least threshold quantity), baseline component can be confirmed as having uptrending.In either case, the amplitude of the variation of baseline component can be higher than threshold quantity.

Whether the high fdrequency component of determining signal meets one or more specified values can comprise processing signals such as using signal processor.In one embodiment, standard includes any high fdrequency component.That is to say, if there is high fdrequency component, standard is considered to satisfied.Other standard can relate to frequency and the amplitude of high fdrequency component." height " frequency component represents: exceed at least frequency of threshold value than baseline component; And/or be empirically defined as indicating the frequency range of bearing wear based on experimental analysis; And/or with the corresponding frequency of the speed (rpm) of turbo-charger shaft.Can use high fdrequency component (if any) the assessment signal 716 of standard signal treatment technology about it.

Fig. 9 flow for displaying figure, illustrates for diagnosing turbosupercharger, for example, above with reference to the method 900 of the turbosupercharger 700 described in Fig. 7.Particularly, the prediction health of bearing and the axle of turbosupercharger is determined in the pressure measurement in the oil supply chamber of method based on turbosupercharger.The prediction health status of turbosupercharger also can comprise the safe life expection of turbosupercharger.Thereby this can for example reflect the required time lag between turbocharger service operation.Therefore,, if the prediction health status of turbosupercharger is degenerated (that is to say, safe life expection reduces), will need more continually housekeeping operation.By contrast, if the prediction health status of turbosupercharger is improved (that is to say, safe life expection increases), will need not too continually housekeeping operation.

In the step 902 of method, determine system operational condition.Operational condition can comprise that boost pressure, turbine speed, external pressure, ambient temperature, motor recess arrange etc.

Once determine operational condition, method enters step 904, wherein measuring pressure in oil supply.For example, pressure can be monitored by pressure transducer, for example pressure transducer or other suitable manometer.

In step 906, carry out the first high fdrequency component of assessing to determine pressure signal.As mentioned above, the high fdrequency component of pressure signal can be the frequency that exceeds at least one threshold value than the baseline component of signal.In other example, high fdrequency component can be the frequency range that is empirically defined as indicating bearing wear based on experimental analysis.As another example, high fdrequency component can be the frequency corresponding with the speed of turbo-charger shaft.For example, high fdrequency component can be the harmonic wave of turbine speed.

Once carry out the first assessment, method enters step 908, wherein judge whether high fdrequency component meets one or more specified values.As an example, specified value can comprise that the high fdrequency component of signal is satisfied or exceed threshold frequency.

If judge that high-frequency signal meets specified value, method enters step 916, wherein generates the first control signal.The first control signal can be indicated the healthy relevant operator's alarm of prediction to turbosupercharger.For example, control signal can be formatted as and make system responses control signal generating run person alarm.As an example, prediction health can comprise destructive axle motion and progressive bearing fault.Thereby the first control signal also can format to indicate the degeneration of turbosupercharger.

On the other hand, if determine the discontented sufficient specified value of high fdrequency component, method enters step 910, wherein carries out the second baseline component of assessing to determine pressure signal.As mentioned above, baseline component can be only to have the steady state pressure that lower frequency changes.In an example, baseline component can be with new turbosupercharger or other known nominal turbosupercharger oil pressure after the associated engine start of the turbosupercharger that operates.In an example, can store along with the time baseline component of pressure signal.In such example, currency baseline component can with storage data comparison.

Thereby once carry out the second assessment, method enters step 912, wherein judge whether the amplitude of the variation of the baseline component of pressure signal is greater than threshold quantity.That is to say, can determine the skew of baseline pressure pulse or the amplitude of variation in machine oil loop.Thereby, variation can comprise pressure signal baseline component increase or reduce.In an example, be less than stored data and reach at least described threshold quantity and can determine that baseline component has downward trend and if baseline component can reduce the currency of baseline component.As an example, once increasing the signal of baseline component, bearing play will there is downward trend.In alternate examples, be greater than storage data and reach at least threshold quantity and determine that baseline component has uptrending and if baseline component can increase the currency of baseline component.As an example, if each revolution is seen total dynamic response (due to imbalance) of primary system, the signal of baseline component can have uptrending.Exceed threshold quantity (that is to say do not have trend downward or upward) if definite baseline component does not change, method enters step 918 and continues current system operation.On the other hand, for example, if determine that the amplitude of the variation of baseline component exceedes threshold quantity (, baseline component has trend downward or upward), method enters step 914, wherein generates the second control signal.Be similar to the first control signal, the second control signal can be indicated the predicted operating condition of turbosupercharger.For example, the second control signal can be indicated the degeneration of turbosupercharger, for example destructive axle motion and progressive bearing fault.As another example, signal can indicate the safe life expection of the healthy degeneration of the prediction of turbosupercharger and/or turbosupercharger to reduce.By the instruction of prediction health and safety life expectancy of turbosupercharger is provided, can arrange suitably and in time housekeeping operation.

Due to the caused destructive turbo-charger shaft motion of bearing fault, the high fdrequency component of signal can be detected or high fdrequency component can be greater than threshold frequency.In addition, the baseline component of pressure signal can have downward trend due to bearing fault.Therefore, one of the high frequency by the pressure in the compressed oil supply of monitoring turbosupercharger and baseline component or both, can diagnose the degeneration of turbosupercharger.With which, can take appropriate measures to regulate the operation of turbosupercharger and/or safeguard to prevent for example chance failure for turbosupercharger provides.

In the time using in the present invention, with singulative narration and there is the element of word " " above or step is appreciated that and does not get rid of multiple described elements or step, unless clearly stated such eliminating.In addition, quoting of " embodiment " of the present invention is not intended to be interpreted as getting rid of the existence of the additional embodiment that yet comprises described feature.And unless explanation on the contrary clearly, " comprising ", " comprising " or " having " can comprise additional such element without this character with the element of special properties or the embodiment of multiple elements.Term " comprises " and " wherein " " comprises " and the equivalent plain language of " wherein " as corresponding term.And term " first ", " second " and " the 3rd " etc. are only with marking, and be not intended to numerical value requirement or special position order to force at their object.

This written description openly comprises the present invention of optimal mode with example, and also makes those of ordinary skill in the art can implement the present invention, comprises and manufactures and use any device or system and carry out any method comprising.The scope of the claims of the present invention is defined by the claims, and can comprise other example that those of ordinary skill in the art expects.Other example is like this intended to belong in the scope of claim, as long as they have the structural element as broad as long with the word language of claim, or as long as they comprise and the word language of the claim equivalent structure element without substantive difference.

Claims

1. a method, described method comprises:

Receive the signal of the monitoring pressure of the compressed oil supply of instruction turbosupercharger or other turbomachinery;

Whether the high fdrequency component of determining described signal meets one or more specified values;

And, if the described high fdrequency component of described pressure meets described one or more specified value, generate the first control signal.

2. method according to claim 1, is characterized in that, the described control signal instruction operator alarm relevant to the prediction health of described turbosupercharger.

3. method according to claim 2, is characterized in that, described prediction health comprises destructive turbo-charger shaft motion and progressive bearing fault.

4. method according to claim 2, is characterized in that, the healthy safe life expection that comprises described turbosupercharger of described prediction.

5. method according to claim 1, is characterized in that, described method also comprises:

Monitor the baseline component of described signal; And

If the amplitude of the variation of described baseline component is greater than threshold quantity, generate the second control signal.

6. method according to claim 5, is characterized in that, the described baseline component of described signal is the steady state pressure of described compressed oil supply.

7. method according to claim 5, is characterized in that, described the second control signal is indicated the degeneration of described turbosupercharger.

8. method according to claim 1, is characterized in that, described high fdrequency component comprises the frequency in the scope of indicating bearing wear.

9. a method, described method comprises:

Carry out the first assessment of the high fdrequency component of described signal;

Carry out the second assessment of the baseline component of described signal; And

Based on described the first assessment and described the second assessment, generate the control signal of the predicted operating condition of the described turbosupercharger of instruction.

10. method according to claim 9, it is characterized in that, described the first assessment comprises whether the described high fdrequency component of determining described signal meets one or more specified values, and described the second assessment comprises whether the amplitude of the variation of the described baseline component of determining described signal is greater than threshold quantity.

11. methods according to claim 10, is characterized in that, described method also comprises the degeneration of indicating described turbosupercharger in the time that the amplitude increase of the variation of the described baseline component of described signal exceedes described threshold quantity.

12. methods according to claim 10, is characterized in that, described specified value comprises that the described high fdrequency component of described signal is greater than threshold frequency.

13. methods according to claim 12, is characterized in that, described method also comprises the degeneration of indicating described turbosupercharger in the time that the described high fdrequency component of described signal is greater than described threshold frequency.

14. methods according to claim 9, it is characterized in that, described method also comprises the data of described baseline component that change the described signal of storage along with the time, and wherein carries out described the second assessment and comprise the currency of more described baseline component and the data of storing.

15. methods according to claim 9, is characterized in that, described high fdrequency component has the frequency that exceeds at least one threshold value than described baseline.

16. 1 kinds of systems, described system comprises:

Have the turbosupercharger of compressor and turbo machine, described turbosupercharger is connected to the motor in vehicle;

Pressure transducer, described pressure transducer is configured to generate the signal of instruction monitoring pressure, and described signal comprises frequency component and baseline component, and described pressure transducer is arranged in the compressed oil supply of described turbosupercharger; And

Control module, described control module is configured to receive the described signal from described pressure transducer, carries out the first assessment of described frequency component, carries out the second assessment of described baseline component, and based on described the first assessment and described the second assessment, output control signal.

17. systems according to claim 16, is characterized in that, described control signal is indicated the predicted operating condition of described turbosupercharger.

18. systems according to claim 17, is characterized in that, described turbo machine and described compressor connect via axle, and wherein said predicted operating condition comprises destructive turbo-charger shaft motion.

19. systems according to claim 16, is characterized in that, described control module is also configured to change along with the time data of the described baseline component of storage.

20. systems according to claim 19, it is characterized in that, described control module is also configured to the currency of more described baseline component during described the second assessment and the data of storing and is less than the degeneration of indicating described turbosupercharger when stored data reach at least one threshold value when described currency.