CN111610030B - Method and equipment for testing working state of engine - Google Patents
Method and equipment for testing working state of engine Download PDFInfo
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- CN111610030B CN111610030B CN202010476124.2A CN202010476124A CN111610030B CN 111610030 B CN111610030 B CN 111610030B CN 202010476124 A CN202010476124 A CN 202010476124A CN 111610030 B CN111610030 B CN 111610030B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/05—Testing internal-combustion engines by combined monitoring of two or more different engine parameters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The present disclosure provides a test method and a test device for an engine working state, wherein the engine is provided with a lubricating system, the lubricating system is provided with lubricating oil, and the lubricating system is provided with a minimum limit pressure and a maximum limit pressure; the test method comprises the following steps: setting a target pressure of the lubrication system, the target pressure being greater than or equal to the minimum limit pressure and less than or equal to the maximum limit pressure; acquiring the working pressure of the lubricating system when the engine works; adjusting the temperature of the lubricating oil to enable the working pressure to reach the target pressure; and testing the working state of the engine at the target pressure. The testing method can adjust the working pressure of the lubricating system in the actual running process of the engine, and enable the working pressure to be always stabilized in the target pressure state so as to test the working performance of the engine under the target pressure.
Description
Technical Field
The present disclosure relates to the field of testing technologies, and in particular, to a method and a device for testing an operating state of an engine.
Background
In the process of an engine bench test, uneven heat is generated when an engine runs, so that the pressure of a lubricating system is difficult to be always stabilized at a specific value, and the working state of the engine under the specific pressure of the lubricating system cannot be tested when the engine works.
At present, in order to test the working state of an engine under the specific pressure of a lubricating system, a computer simulation calculation mode is generally adopted, but the computer simulation calculation cannot accurately simulate the working state and the working process of the engine.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a method and equipment for testing the working state of an engine, which can adjust the pressure of a lubricating system in the process of starting operation and keep the pressure stable so as to test the working performance of the engine.
According to a first aspect of the present disclosure, there is provided a method of testing an operating condition of an engine, the engine having a lubrication system with a lubricating oil, the lubrication system having a minimum limit pressure and a maximum limit pressure; the test method comprises the following steps:
setting a target pressure of the lubrication system, the target pressure being greater than or equal to the minimum limit pressure and less than or equal to the maximum limit pressure;
acquiring the working pressure of the lubricating system when the engine works;
adjusting the temperature of the lubricating oil to enable the working pressure to reach the target pressure;
and testing the working state of the engine at the target pressure.
In an exemplary embodiment of the present disclosure, the adjusting the temperature of the lubricating oil to bring the working pressure to the target pressure includes:
judging whether the working pressure is greater than the target pressure;
when the working pressure is smaller than the target pressure, reducing the temperature of the lubricating oil to enable the working pressure to rise to the target pressure;
and when the working pressure is greater than the target pressure, increasing the temperature of the lubricating oil to reduce the working pressure to the target pressure.
In an exemplary embodiment of the present disclosure, the lubricating oil has a minimum limit temperature, and the decreasing the temperature of the lubricating oil to raise the operating pressure to the target pressure when the operating pressure is less than the target pressure includes:
acquiring the temperature of the lubricating oil when the engine works;
measuring and calculating the calorific value required to be reduced by the lubricating oil according to the temperature of the lubricating oil, the minimum limit temperature, the working pressure and the target pressure;
and reducing the temperature of the lubricating oil according to the reduced heat value to raise the working pressure to the target pressure.
In an exemplary embodiment of the present disclosure, the lubricating oil has a maximum limit temperature, and the increasing the temperature of the lubricating oil to decrease the operating pressure to the target pressure when the operating pressure is greater than the target pressure includes:
acquiring the temperature of the lubricating oil when the engine works;
calculating the heat value required to be added to the lubricating oil according to the temperature of the lubricating oil, the maximum limit temperature, the working pressure and the target pressure;
and increasing the temperature of the lubricating oil according to the required increased heat value to reduce the working pressure to the target pressure.
In a second aspect of the present disclosure, there is provided a device for testing the operating condition of an engine, the engine having a lubrication system and an oil supply pump, the oil supply pump having a pump inlet and a pump outlet for supplying lubricating oil to the lubrication system; the test apparatus includes:
the testing device is used for testing the working state of the engine;
an oil supply control device comprising: a central processing unit, a pressure detector and a temperature regulating assembly, wherein,
the pressure detector is provided with an output end and a detection end, the output end is connected with the central processing unit, and the detection end is connected with the outlet of the pump so as to detect the pressure of the lubricating oil pumped out by the oil supply pump;
the temperature adjusting assembly is provided with a control end, an oil inlet end and an oil outlet end, the control end is connected with the central processing unit, the oil inlet end is connected with the outlet of the pump, the oil outlet end is connected with the lubricating system, and the temperature adjusting assembly is used for changing the temperature of the lubricating oil pumped out by the oil supply pump.
In an exemplary embodiment of the present disclosure, the oil supply control apparatus further includes:
and the temperature detector is positioned between the pump outlet and the temperature adjusting component and is connected with the central processing unit so as to detect the temperature of the lubricating oil pumped out of the oil supply pump and provide the temperature to the central processing unit.
In an exemplary embodiment of the present disclosure, the temperature adjustment assembly includes:
a temperature and pressure raising and reducing component and a temperature and pressure lowering and raising component, wherein,
the temperature-raising and pressure-reducing component comprises: the first heat exchanger is provided with a first oil inlet and a first oil outlet, the first oil inlet is connected with the oil inlet end, and the first oil outlet is connected with the oil outlet end; the heater is connected with the central processing unit;
the cooling and boosting assembly comprises: the second heat exchanger is provided with a second oil inlet and a second oil outlet, the second oil inlet is connected with the oil inlet end, and the second oil outlet is connected with the oil outlet end; the cooler is connected with the central processing unit.
In an exemplary embodiment of the present disclosure, the temperature-increasing and pressure-reducing assembly further includes:
the first temperature sensor is positioned between the oil inlet end and the first oil inlet and is connected with the central processing unit;
the second temperature sensor is positioned between the first oil outlet and the oil outlet end and is connected with the central processor.
In an exemplary embodiment of the present disclosure, the increasing and decreasing the temperature and the pressure further includes:
the flow divider is provided with a third oil inlet, a third oil outlet, a flow dividing port and a first control port, the third oil inlet is connected with the first oil outlet, the third oil outlet is connected with the oil outlet end, the flow dividing port is connected with the pump inlet, and the first control port is connected with the central processing unit.
In an exemplary embodiment of the present disclosure, the oil supply control apparatus further includes:
a safety controller comprising: the safety controller is used for preventing the lubricating oil which does not accord with the test requirement from entering the lubricating system.
According to the technical scheme, the method for testing the working state of the engine in the exemplary embodiment of the disclosure has at least the following advantages and positive effects:
the method for testing the working state of the engine changes the viscosity of the lubricating oil by changing the temperature of the lubricating oil when the engine works, so that the working pressure of a lubricating system is changed. The temperature of the lubricating oil is increased or reduced in the running process of the engine, so that the pressure of the lubricating system reaches the target pressure, and the aim of changing the working pressure of the lubricating system in the working process of the engine is fulfilled. Meanwhile, the working pressure of the lubricating system can be adjusted by adjusting the temperature of the lubricating oil, so that the pressure of the engine lubricating system can be always stabilized in a target pressure state by the testing method, and the engine can work in the target pressure state for a long time, so that the working state of the engine under the target pressure can be accurately tested, and the working process of the engine under the target pressure can be visually observed.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
FIG. 1 schematically shows a flow diagram of a testing method according to an embodiment of the present disclosure;
FIG. 2 schematically illustrates a schematic diagram of a testing apparatus and a lubrication system according to an embodiment of the present disclosure;
FIG. 3 schematically illustrates a schematic view of a lubrication system according to an embodiment of the present disclosure;
FIG. 4 schematically illustrates a schematic view of a temperature adjustment assembly according to an embodiment of the present disclosure;
FIG. 5 schematically illustrates a schematic diagram of a temperature and pressure increasing and decreasing assembly, according to an embodiment of the present disclosure;
FIG. 6 schematically illustrates a schematic diagram of a temperature and pressure increasing and decreasing assembly according to another embodiment of the present disclosure;
FIG. 7 schematically illustrates a schematic diagram of a cool down boost assembly according to an embodiment of the present disclosure;
FIG. 8 schematically illustrates a schematic diagram of a cool down and boost assembly according to another embodiment of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the disclosure.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.
The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
One aspect of the disclosure discloses a method for testing an engine working state, which can adjust a working pressure of a lubrication system in an actual operation process of an engine and stabilize the working pressure at a target pressure all the time to test the working performance of the engine under the target pressure. The engine may be an aircraft gas turbine shaft engine, but is not limited thereto, and may also be other engines, which are within the protection scope of the present disclosure. The engine may have a lubrication system with lubrication oil therein, and the lubrication system has a minimum limit pressure and a maximum limit pressure. It should be understood that the pressure of the oil system may be the pressure of the lubricating oil in the lubrication system. The pressure of the lubrication system may be related to the viscosity of the lubrication oil in the lubrication system, and as the viscosity of the lubrication oil increases, the pressure of the lubrication system may increase; as the viscosity of the lubricating oil decreases, the pressure in the lubrication system decreases. Also, when the pressure of the lubrication system is less than the minimum limit pressure or greater than the maximum limit pressure, the engine may be damaged and thus may not operate normally.
As shown in fig. 1, the testing method includes:
step S10, setting a target pressure of the lubrication system, the target pressure being greater than or equal to a minimum limit pressure and less than or equal to a maximum limit pressure;
step S20, acquiring the working pressure of the lubricating system when the engine works;
step S30, adjusting the temperature of the lubricating oil to make the working pressure reach the target pressure;
in step S40, the operating state of the engine at the target pressure is tested.
The above steps are explained in detail below:
in step S10, a target pressure for the lubrication system may be set, it being understood that the target pressure for the lubrication system may be a target pressure for the lubrication oil in the lubrication system. When the set target pressure value is the minimum limit pressure, the working state of the engine under the minimum limit pressure of the lubricating system is tested; when the set target pressure is the maximum limit pressure, the working state of the engine under the maximum limit pressure of the lubricating system is tested; when the target pressure is set between the maximum limit pressure and the lowest limit pressure, the test engine is in the operating state in which the intermediate pressure state is.
In step S20, the operating pressure of the lubrication system may be obtained while the engine is operating. In particular, a pressure sensor may be pre-installed to obtain the operating pressure of the lubrication system when the engine is in operation. Without limitation, it is within the scope of the present disclosure that the operating pressure of the lubrication system during engine operation may be obtained in other ways.
In step S30, the temperature of the lubricating oil may be adjusted so that the operating pressure reaches the target pressure.
Specifically, the step S30 may include:
judging whether the working pressure is greater than the target pressure;
when the working pressure is lower than the target pressure, reducing the temperature of the lubricating oil to enable the working pressure to rise to the target pressure;
when the working pressure is higher than the target pressure, the temperature of the lubricating oil is increased, and the working pressure is reduced to the target pressure.
For example, the cpu may determine whether the acquired operating pressure is greater than the target pressure by setting the target pressure in the cpu. But not limited thereto, and it is within the scope of the disclosure that the determination may be made manually or by other means. The central processing unit may be a PLC controller, but is not limited thereto.
When the central processing unit judges that the working pressure is less than the target pressure, the temperature of the lubricating oil can be reduced through the temperature reduction and pressurization device, the temperature reduction and pressurization device can be a fan, but is not limited to the fan, and the temperature reduction and pressurization device can also be a condensing device, and the temperature reduction and pressurization device and the condensing device are within the protection scope of the disclosure.
Further, the above-mentioned lubricating oil may have a minimum limit temperature, and it is understood that the lubricating oil is not suitable for use after the temperature of the lubricating oil is less than the minimum limit temperature. When the operating pressure is less than the target pressure, reducing the temperature of the lubricating oil to raise the operating pressure to the target pressure may include:
acquiring the temperature of lubricating oil when an engine works;
measuring and calculating the heat value required to be reduced by the lubricating oil according to the temperature, the minimum limit temperature, the working pressure and the target pressure of the lubricating oil;
and reducing the temperature of the lubricating oil according to the required reduced calorific value, so that the working pressure is increased to the target pressure.
Specifically, the temperature sensor may be preset to acquire the temperature of the lubricating oil when the engine is operating, but is not limited thereto, and the temperature of the lubricating oil may also be acquired by using an infrared sensor. And after the temperature of the lubricating oil is acquired, sending the temperature value to a central processing unit, and inputting the minimum limit temperature of the lubricating oil to the central processing unit. And the central processing unit is used for measuring and calculating the heat value required to be reduced when the working pressure of the lubricating oil reaches the target pressure according to the temperature of the lubricating oil, the minimum limit temperature of the lubricating oil, the working pressure of a lubricating system and the target pressure. And according to the heat value, the temperature reduction and increase device is controlled to accurately reduce the temperature of the lubricating oil, so that the working pressure of the lubricating system accurately reaches the target pressure. But not limited to, the control and calculation can be performed without using a central processing unit, for example: it is within the scope of the present disclosure to utilize manual or other computing and control devices.
Further, when the central processing unit determines that the working pressure is greater than the target pressure, the temperature of the lubricating oil can be raised through the temperature-raising and pressure-reducing device, which can be a resistance wire, but is not limited thereto, and can also be a heat exchanger, which are within the protection scope of the present disclosure.
Further, the above-mentioned lubricating oil may have a maximum limit temperature, and it is understood that the lubricating oil is not suitable to be used when the temperature of the lubricating oil is higher than the maximum limit temperature. When the operating pressure is greater than the target pressure, increasing the temperature of the lubricating oil to reduce the operating pressure to the target pressure may include:
acquiring the temperature of lubricating oil when an engine works;
measuring and calculating the calorific value required to be increased by the lubricating oil according to the temperature, the maximum limit temperature, the working pressure and the target pressure of the lubricating oil;
and raising the temperature of the lubricating oil according to the required increased heat value to reduce the working pressure to the target pressure.
Specifically, a temperature sensor may be preset to obtain the temperature of the lubricating oil when the engine is operating, but the present invention is not limited thereto, and an infrared sensor may be used to obtain the temperature of the lubricating oil. And after the temperature of the lubricating oil is acquired, the temperature value is sent to a central processing unit, and the maximum limit temperature of the lubricating oil is input to the central processing unit. And the central processing unit is used for measuring and calculating the heat value which needs to be increased when the working pressure of the lubricating oil reaches the target pressure according to the temperature of the lubricating oil, the maximum limit temperature of the lubricating oil, the working pressure of a lubricating system and the target pressure. And according to the heat value, the temperature rise and pressure drop device is controlled to accurately rise the temperature of the lubricating oil, so that the working pressure of the lubricating system accurately reaches the target pressure. But not limited thereto, and may be controlled and measured without using a central processing unit.
Further, when the central processing unit determines that the working pressure is less than the target pressure, the temperature of the lubricating oil can be reduced through the temperature-reducing and pressure-increasing device, which may be a fan, but is not limited thereto, and may also be an evaporative condenser, which are all within the protection scope of the present disclosure.
Further, since the lubricating oil has the maximum limit temperature, when the temperature of the lubricating oil rises to the maximum limit temperature and the operating pressure of the lubricating system has not reached the target pressure, a branch oil passage may be provided to branch a part of the lubricating oil in the lubricating system through the branch oil passage to further lower the pressure of the lubricating oil to the target pressure, thereby preventing the problem of failure of the lubricating oil due to further temperature rise.
For example, the engine may not work properly when the operating pressure of the lubrication system is greater than the maximum limit pressure and less than the minimum limit pressure. Therefore, the working pressure of the lubrication system in the engine is usually always kept between the maximum limit pressure and the minimum limit pressure. Therefore, when the target pressure is set to be the minimum limit pressure, namely the working state of the engine at the minimum limit pressure of the lubricating system is tested, the pressure of the lubricating system is reduced to the minimum limit pressure only by increasing the temperature of the lubricating oil or increasing the temperature and shunting; when the target pressure is set as the maximum limit pressure, namely the working state of the engine at the maximum limit pressure of the lubricating system is tested, the pressure of the lubricating system is increased to the maximum limit pressure only by reducing the temperature of the lubricating oil.
The testing method can compare the magnitude relation between the working pressure of the lubricating oil and the target pressure in real time, and adjust the working pressure of the lubricating oil to the target pressure in real time, so that the pressure of the lubricating oil can be stabilized under the target pressure for a long time, the engine can work under the target pressure for a long time, the working state of the engine under the target pressure can be tested more accurately, and the working state of the engine can be observed visually.
In step S40, the operating condition of the engine at the target pressure is tested. Specifically, the complete machine bench test device may be used to test the working state of the engine, so as to facilitate observing the working process of the engine, but is not limited thereto, and other devices capable of testing the working state of the engine may also be used to test, which is within the protection scope of the present disclosure.
As shown in fig. 2 and 3, a second aspect of the present disclosure discloses a device 3 for testing the operating condition of an engine, wherein the engine may have a lubrication system 1 and an oil supply pump 2, the oil supply pump 2 having a pump inlet and a pump outlet for supplying lubrication oil to the lubrication system 1.
The lubrication system 1 may include a first filter device 11, a radiator 12, an engine bearing cavity 13, a second filter device 14, a magnetic debris detection annunciator 15, a scavenge pump 16, and a lube oil tank 17. Wherein one end of the first filtering device 11 may be connected with the testing apparatus 3 to filter the lubricating oil entering the lubricating system 1 from the oil supply control device 32, and the other end of the first filtering device 11 may be connected with the radiator 12. One end of the engine bearing housing 13 may be connected to the radiator 12 and the other end may be connected to the second filter device 14. One end of the magnetic debris detection annunciator 15 is connected to the second filter 14 and the other end can be connected to the scavenge pump 16 to detect the degree of wear of the engine bearings. The lubricating oil tank 17 may have one end connected to the scavenge pump 16 and the other end connected to the pump inlet of the feed pump 2.
As shown in fig. 2, the test apparatus 3 may include a test device 31 and an oil supply control device 32. The test device 3 can regulate the working pressure of the lubricating system 1 in the actual running process of the engine and make the working pressure be stabilized in the target pressure state all the time so as to test the working performance of the engine under the target pressure.
Specifically, the testing device 31 may be an engine complete machine bench testing device for testing the operating state of the engine, but is not limited thereto, and may also be other testing devices as long as the engine operating state can be tested, which is within the protection scope of the present disclosure.
The oil supply control device 32 may include: a central processor 321, a pressure detector 322 and a temperature regulating assembly 323. The central processor 321 may be a PLC controller, but is not limited thereto, and may also be a device having a computer control function, which is within the protection scope of the present disclosure. Several parameters of the target pressure, the maximum limit pressure of the lubrication system 1, the minimum limit pressure of the lubrication system 1, the maximum limit temperature of the lubricating oil and the minimum limit temperature of the lubricating oil may be inputted into the central processor 321 before the engine operation state test.
The pressure detector 322 may have an output terminal and a detection terminal, wherein the output terminal may be connected to the cpu 321, the detection terminal may be connected to the fuel supply pump 2, and it should be understood that the detection terminal is connected to the pump outlet of the fuel supply pump 2. The pressure detector 322 may detect the pressure of the lubricating oil pumped out from the oil outlet of the feed pump 2 and transmit the pressure value to the cpu 321.
The thermostat assembly 323 can have a control end, an oil inlet end 3260, and an oil outlet end 3261. Wherein, the control terminal can be connected to the central processing unit 321 to control the operation of the temperature adjustment assembly 323 through the central processing unit 321; the oil inlet port 3260 may be connected to the pump outlet of the oil supply pump 2 to receive the lubricant pumped out by the pump outlet of the oil supply pump 2; the oil outlet end 3261 may be connected to the lubrication system 1 for delivering the temperature-regulated lubricating oil to the lubrication system 1.
As shown in fig. 4, further, the temperature adjustment assembly 323 may include: a temperature raising and lowering module 3231 and a temperature lowering and raising module 3232. After the pressure sensor transmits the pressure of the lubricating oil at the outlet of the oil supply pump 2 to the central processing unit 321, the central processing unit 321 determines the magnitude relation between the pressure and the target pressure, and when the pressure is greater than the target pressure, the central processing unit 321 can control the temperature-increasing and pressure-decreasing assembly 3231 to increase the temperature of the lubricating oil to decrease the pressure of the lubricating oil; when the pressure is less than the target pressure, the cpu 321 may control the cooling-boosting assembly 3232 to lower the temperature of the lubricating oil to increase the pressure of the lubricating oil.
Further, as shown in fig. 5 and 6, the temperature and voltage raising and lowering assembly 3231 may include: a first heat exchanger 3233 and a heater 3234, wherein the first heat exchanger 3233 may have a first oil inlet and a first oil outlet, wherein the first oil inlet may be connected with the oil inlet end 3260, and the first oil outlet may be connected with the oil outlet end 3261. The first heat exchanger 3233 may have a receiving cavity for receiving lubricating oil, so that the temperature of the lubricating oil is raised more uniformly, but not limited thereto, the first heat exchanger 3233 may also be provided with only one lubricating oil pipe, and the lubricating oil is heated during the flowing process of the lubricating oil.
The heater 3234 may be connected to the cpu 321, and the cpu 321 may control the heater 3234 to heat the lubricant. The heater 3234 may be a resistance wire 3235, but is not limited thereto, and may be a heat exchanger. The heat exchanger may include a container 3236, a temperature increasing device 3237, a conveying pipe and a conveyor 3239, wherein the container 3236 may contain a high temperature medium for heat exchange, and the high temperature medium may be exhaust gas of an engine, hot water, or the like. The temperature increasing device 3237 is used to increase the temperature of the high-temperature medium. The duct is intended to convey the high-temperature medium, and in order to make the heat exchanger better warm up the lubricating oil, the duct may be arranged around the first heat exchanger. Conveyor 3239 may provide power for the circulation of the high temperature medium, and conveyor 3239 may be a gear pump, but the present disclosure does not limit conveyor 3239 as long as power can be provided. Further, in order to accurately control the temperature of the lubricating oil, the heat exchanger may further be provided with a flow rate adjusting device 3238 for flexibly adjusting the flow rate of the high-temperature medium to achieve accurate control. The flow regulating device may be a flow regulating valve. Compared with the resistance wire 3235, the heat exchanger can enable the temperature of the lubricating oil to rise faster and more accurately.
Further, in order to enable the temperature control of the oil by the temperature and pressure increasing and reducing assembly 3231 to be more accurate, the temperature and pressure increasing and reducing assembly 3231 may further include a first temperature sensor 3240 and a second temperature sensor 3241, wherein the first temperature sensor 3240 may be located between the oil inlet end 3260 and the first oil inlet and connected to the cpu 321, so as to measure the temperature of the oil flowing from the oil inlet end 3260 and transmit the temperature of the oil inlet end 3260 to the cpu 321.
The second temperature sensor 3241 may be located between the first oil outlet and the oil outlet end 3261, and connected to the central processor 321, for transmitting the temperature of the lubricating oil at the oil outlet end 3261 to the central processor 321. Therefore, the central processor 321 can precisely control the heating amount of the heater 3234 by the temperature of the oil inlet end 3260 and the temperature of the oil outlet end 3261.
The temperature-raising and pressure-reducing assembly 3231 may further include a flow divider 3255, where the flow divider 3255 may have a third oil inlet, a third oil outlet, a flow dividing port and a first control port, where the third oil inlet may be connected to the first oil outlet, the third oil outlet may be connected to the oil outlet port 3261, the flow dividing port may be connected to a pump inlet or a lubricating oil tank of the oil supply pump 2, and the first control port may be connected to the central processor 321. The flow divider 3255 is used to divide the lubricant out to further reduce the pressure of the lubricant when the temperature of the lubricant rises to the maximum temperature limit of the lubricant and the pressure of the lubricant has not yet reached the target pressure. The flow divider 3255 may be a relief valve, but is not limited thereto, and may be other devices having a flow dividing function.
Further, the warming and depressurizing assembly 3231 may further include a first check valve 3256, an inlet of the first check valve 3256 is connected to a flow dividing port of the flow divider 3255, and an outlet thereof is connected to a pump inlet of the oil supply pump 2 or the oil tank to prevent the oil from flowing backward.
Preferably, the warming and depressurizing assembly 3231 may further include a third check valve 3258, an inlet of the third check valve 3258 is connected with the first oil outlet, and an outlet is connected with the flow divider 3255 to prevent the backflow of the lubricating oil.
Still further, the warming and depressurizing assembly 3231 may further include a gear pump 3259, a first end of the gear pump 3259 may be connected to the first check valve 3256, a second end may be connected to a pump inlet of the oil supply pump 2 or a lubricating oil tank, and a control end may be connected to the cpu 321 for supplying power to the branched lubricating oil.
As shown in fig. 7 and 8, the temperature and pressure reducing assembly 3232 may include: a second heat exchanger 3243 and a desuperheater 3244, wherein the second heat exchanger 3243 may have a second oil inlet and a second oil outlet, the second oil inlet may be connected with the oil inlet end 3260, and the second oil outlet may be connected with the oil outlet end 3261. This second heat exchanger 3243 also can have and hold the chamber to be used for holding lubricating oil for the lubricating oil cooling is more even, but is not limited to this, and this second heat exchanger 3243 also can only set up a lubricating oil pipe, cools down lubricating oil at the mobile in-process of lubricating oil.
The desuperheater 3244 can be connected to the central processing unit 321, and the central processing unit 321 can control the desuperheater 3244 to reduce the temperature of the lubricating oil, so as to increase the pressure of the lubricating oil. The desuperheater 3244 may be a fan 3245, but is not limited thereto, and may be an evaporative condenser.
The evaporative condenser may include: the condenser 3246 is used for condensing the condensing agent into a liquid state, the compressor 3248 is used for providing power for the condensing agent to circulate in the evaporator 3246, and the evaporator 3247 is used for evaporating the liquid condensing agent into a liquid state, so that heat of the lubricating oil is absorbed, and the temperature of the lubricating oil is reduced. Meanwhile, in order to improve the cooling effect of the evaporative condenser, a capillary tube 3249 may be disposed around the second heat exchanger 3243.
Further, in order to enable the cooling and pressurizing assembly 3232 to control the temperature of the lubricating oil more accurately, the cooling and pressurizing assembly 3232 may further include a third temperature sensor 3250 and a fourth temperature sensor 3251, wherein the third temperature sensor 3250 may be located between the oil inlet end 3260 and the second oil inlet, and is connected to the central processor 321, so as to measure the temperature of the lubricating oil flowing from the oil inlet end 3260, and transmit the temperature of the oil inlet end 3260 to the central processor 321.
The fourth temperature sensor 3251 may be located between the second oil outlet port and the oil outlet end 3261, and connected to the central processor 321, for transmitting the temperature of the lubricating oil at the oil outlet end 3261 to the central processor 321. Therefore, the central processor 321 can accurately control the cooling amount of the cooler 3244 through the temperature of the oil inlet end 3260 and the temperature of the oil outlet end 3261.
The cooling and pressurizing device can further comprise a second one-way valve 3257, wherein an inlet of the second one-way valve 3257 is connected with the second oil outlet, and an outlet of the second one-way valve 3257 is connected with the oil outlet end 3261. Thereby preventing cooling from increasing the oil return of the assembly.
In addition, when the cpu 321 has no control function, the temperature-raising and pressure-reducing module 3231 may further include a first controller 3242, a first end of the first controller 3242 may be connected to the cpu 321, a second end of the first controller 3242 may be connected to a first temperature sensor 3240, a third end of the first controller 3242 may be connected to a second temperature sensor 3241, and a control end of the first controller may be connected to the heater 3234 for controlling the operation of the heater 3234 according to a result measured by the cpu 321.
Further, the cooling and pressurizing device may further include a second controller 3252, a first end of the second controller 3252 may be connected to the cpu 321, a second end of the second controller 3252 may be connected to a third temperature sensor 3250, a third end of the second controller 3251 may be connected to a fourth temperature sensor 3251, and a control end of the second controller 3252 may be connected to the cooler 3244, so as to control the cooler 3244 to operate according to a result measured by the cpu 321.
Preferably, the first heat exchanger 3233 and the second heat exchanger 3243 may be the same heat exchanger, that is, the temperature and pressure increasing and reducing assembly 3231 and the temperature and pressure reducing assembly 3232 share one heat exchanger; the first temperature sensor 3240 may be the same temperature sensor as the third temperature sensor 3250, and the second temperature sensor 3241 may be the same temperature sensor as the fourth temperature sensor 3251; the first controller 3242 and the second controller 3252 can be one controller, i.e., a first end of the controller can be connected to the cpu 321, a second end can be connected to one temperature sensor, a third end can be connected to another temperature sensor, and a control end can be connected to the heater 3234 and the cooler 3244. Thereby enabling the structure of the test device 3 to be simplified and the manufacturing process to be simplified.
In addition, as shown in fig. 2, the oil supply control device 32 may further include a temperature detector 326, wherein the temperature detector 326 is located between the pump outlet of the oil supply pump 2 and the temperature adjustment assembly 323, and is connected to the cpu 321 to detect the temperature of the lubricating oil pumped out from the oil supply pump 2 and provide the temperature to the cpu 321. The temperature detector 326 may be a temperature sensor, but is not limited thereto, and may also be other devices capable of detecting temperature, which is within the protection scope of the present disclosure.
When the pressure of the lubricating oil is greater than the target pressure, the cpu 321 can calculate the heating amount required by the lubricating oil according to the temperature of the lubricating oil detected by the temperature detector 326, the maximum limit temperature of the lubricating oil, the target pressure, and the pressure of the lubricating oil, so that the heating amount of the temperature-increasing and pressure-reducing assembly 3231 can be accurately controlled.
When the pressure of the lubricating oil is lower than the target pressure, the cpu 321 can calculate the cooling amount required by the lubricating oil according to the temperature of the lubricating oil detected by the temperature detector 326, the minimum limit temperature of the lubricating oil, the target pressure, and the pressure of the lubricating oil, so that the cooling amount of the cooling/pressurizing assembly 3232 can be accurately controlled.
In addition, as shown in fig. 4, the temperature adjustment assembly 323 may further include a first selector valve 3253 and a second selector valve 3254. A first end of the first selector valve 3253 is connected to the oil inlet end 3260, a second end of the first selector valve 3253 is connected to the first oil inlet, and a control end of the first selector valve can be connected to the central processor 321 to control whether the lubricating oil can enter the temperature-raising and pressure-reducing assembly 3231; a first end of the second selector valve 3254 is connected to the oil inlet port 3260, a second end of the second selector valve is connected to the second oil inlet, and a control end of the second selector valve may be connected to the central processor 321, so as to control whether the lubricating oil can enter the cooling and pressurizing assembly 3232.
Preferably, as shown in fig. 2, the oil supply control device 32 may further include a safety controller 324, and the safety controller 324 may include: the fourth oil inlet, the fourth oil outlet and the second control port. The fourth oil inlet can be connected with the oil outlet end 3261, the fourth oil outlet can be connected with the lubricating system 1, and the second control port can be connected with the central processor 321, so as to prevent lubricating oil which does not meet the test requirement from entering the lubricating system 1 and damaging the engine. Preferably, the fourth oil outlet may be connected with the first filtering device 11. It should be noted that the lubricating oil which does not meet the test requirements as used herein means lubricating oil having a temperature higher than the maximum limit temperature, lubricating oil having a temperature lower than the minimum limit temperature, lubricating oil having a pressure higher than the maximum limit pressure, and lubricating oil having a pressure lower than the minimum limit pressure. The safety controller 324 may be a safety valve, but is not limited thereto, and may also be other devices having a safety control function, which are within the protection scope of the present disclosure.
Further, in order to prevent the test equipment 3 from being damaged in the test process, the test equipment 3 is further provided with a safety oil path, the safety oil path is provided with a bypass safety valve 325, a first end of the bypass safety valve 325 is connected with an oil inlet of the oil supply pump 2, a second end of the bypass safety valve 325 is connected with the lubricating system 1, and a control end of the bypass safety valve is connected with the central processing unit 321. Therefore, when the testing device 3 is damaged during the testing process, the cpu 321 can control the bypass safety valve 325 to open, so that the lubricating oil directly enters the lubricating system 1. Preferably, the bypass safety shutter 325 may be connected to the first filter device 11.
It should be noted that the connection between the two devices (not including the cpu 321, the first controller 3242, and the second controller 3252) and the connection between any two ports are all connected by a pipeline, which is shown by a solid line connecting any of the devices and ports in fig. 2 to 8. But not limited thereto, two devices or two ports may be directly connected according to actual situations, and this is also within the protection scope of the present disclosure. It is within the scope of the present disclosure that any of the above-described devices or ports may be electrically connected to the central processor 321, the first controller 3242 and the second controller 3252, or wirelessly transmitted, as shown by the dashed lines in fig. 2-8.
This test equipment 3 can compare the operating pressure of lubricating oil and the big or small relation of target pressure in real time to adjust the operating pressure of lubricating oil to target pressure in real time, thereby can make the pressure of lubricating oil stabilize under target pressure for a long time, thereby can make the long-time work under this target pressure of engine, thereby the operating condition of test engine under this target pressure that can be more accurate, and the operating condition of this engine of can audio-visual observation.
Preferably, the test device 3 can be applied in the above-described test method for testing the operating state of the engine.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the techniques disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the terms of the appended claims.
Claims (10)
1. A method of testing the operating condition of an engine, wherein the engine has a lubrication system with a lubricating oil, and the lubrication system has a minimum limit pressure and a maximum limit pressure; the test method comprises the following steps:
setting a target pressure of the lubrication system, the target pressure being greater than or equal to the minimum limit pressure and less than or equal to the maximum limit pressure;
acquiring the working pressure of the lubricating system when the engine works;
adjusting the temperature of the lubricating oil to enable the working pressure to reach the target pressure;
and testing the working state of the engine at the target pressure.
2. The method of claim 1, wherein said adjusting the temperature of the lubricating oil to bring the operating pressure to the target pressure comprises:
judging whether the working pressure is greater than the target pressure;
when the working pressure is smaller than the target pressure, reducing the temperature of the lubricating oil to enable the working pressure to rise to the target pressure;
and when the working pressure is greater than the target pressure, increasing the temperature of the lubricating oil to reduce the working pressure to the target pressure.
3. The method of claim 2, wherein the lubricant oil has a minimum limit temperature, and wherein decreasing the temperature of the lubricant oil to raise the operating pressure to the target pressure when the operating pressure is less than the target pressure comprises:
acquiring the temperature of the lubricating oil when the engine works;
calculating the heat value required to be reduced by the lubricating oil according to the temperature of the lubricating oil, the minimum limit temperature, the working pressure and the target pressure;
and reducing the temperature of the lubricating oil according to the required reduced heat value, so that the working pressure is increased to the target pressure.
4. The method of claim 2, wherein the lubricant oil has a maximum limit temperature, and wherein increasing the temperature of the lubricant oil to reduce the operating pressure to the target pressure when the operating pressure is greater than the target pressure comprises:
acquiring the temperature of the lubricating oil when the engine works;
calculating the heat value required to be added to the lubricating oil according to the temperature of the lubricating oil, the maximum limit temperature, the working pressure and the target pressure;
and increasing the temperature of the lubricating oil according to the required increased heat value to reduce the working pressure to the target pressure.
5. Apparatus for testing the operating condition of an engine, said engine having a lubrication system and an oil supply pump having a pump inlet and a pump outlet for supplying lubricating oil to said lubrication system; the test apparatus includes:
the testing device is used for testing the working state of the engine;
an oil supply control device comprising: a central processing unit, a pressure detector and a temperature regulating assembly, wherein,
the pressure detector is provided with an output end and a detection end, the output end is connected with the central processing unit, and the detection end is connected with the outlet of the pump so as to detect the pressure of the lubricating oil pumped out by the oil supply pump;
the temperature adjusting assembly is provided with a control end, an oil inlet end and an oil outlet end, the control end is connected with the central processing unit, the oil inlet end is connected with the outlet of the pump, the oil outlet end is connected with the lubricating system, and the temperature adjusting assembly is used for changing the temperature of the lubricating oil pumped out by the oil supply pump so that the pressure of the lubricating oil reaches a target pressure, and the testing device tests the working state of the engine under the target pressure.
6. The test apparatus according to claim 5, wherein the oil supply control device further includes:
and the temperature detector is positioned between the pump outlet and the temperature adjusting component and is connected with the central processing unit so as to detect the temperature of the lubricating oil pumped out of the oil supply pump and provide the temperature to the central processing unit.
7. The test apparatus of claim 5, wherein the temperature adjustment assembly comprises:
a temperature and pressure raising and reducing component and a temperature and pressure lowering and raising component, wherein,
the temperature-raising and pressure-reducing component comprises: the first heat exchanger is provided with a first oil inlet and a first oil outlet, the first oil inlet is connected with the oil inlet end, and the first oil outlet is connected with the oil outlet end; the heater is connected with the central processing unit;
the cooling and boosting assembly comprises: the second heat exchanger is provided with a second oil inlet and a second oil outlet, the second oil inlet is connected with the oil inlet end, and the second oil outlet is connected with the oil outlet end; the cooler is connected with the central processing unit.
8. The test apparatus of claim 7, wherein the temperature and voltage increasing and decreasing assembly further comprises:
the first temperature sensor is positioned between the oil inlet end and the first oil inlet and is connected with the central processing unit;
the second temperature sensor is positioned between the first oil outlet and the oil outlet end and is connected with the central processor.
9. The test apparatus of claim 8, wherein the increasing and decreasing the temperature further comprises:
the flow divider is provided with a third oil inlet, a third oil outlet, a flow dividing port and a first control port, the third oil inlet is connected with the first oil outlet, the third oil outlet is connected with the oil outlet end, the flow dividing port is connected with the pump inlet, and the first control port is connected with the central processing unit.
10. The test apparatus according to claim 5, wherein the oil supply control device further includes:
a safety controller comprising: the safety controller is used for preventing the lubricating oil which does not meet the test requirements from entering the lubricating system.
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