CN113418714A - Diesel engine crankcase and lubricating oil temperature control circulation integrated plateau air pressure simulation device - Google Patents
Diesel engine crankcase and lubricating oil temperature control circulation integrated plateau air pressure simulation device Download PDFInfo
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- CN113418714A CN113418714A CN202110680058.5A CN202110680058A CN113418714A CN 113418714 A CN113418714 A CN 113418714A CN 202110680058 A CN202110680058 A CN 202110680058A CN 113418714 A CN113418714 A CN 113418714A
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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
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Abstract
The invention provides a diesel engine crankcase and lubricating oil temperature control circulation integrated plateau air pressure simulation device, which comprises a vacuum pump, a gas pressure stabilizing tank, a lubricating oil tank, a tube heat exchanger, an electric three-way valve, a gear oil pump, an oil filter, an electric regulating valve, a water filter, a connecting pipeline, a temperature and pressure monitoring sensor and the like. The components are connected through pipelines to form an integrated device, the device can meet the requirement of diesel engine lubricating oil circulation supply and temperature control, can be communicated with a diesel engine breather, and enables the exhaust port of the diesel engine breather and the diesel engine lubricating circulation system to realize a negative pressure state through air exhaust, air supplement and pressure stabilization control so as to simulate the high atmospheric pressure.
Description
Technical Field
The invention belongs to the technical field of diesel engine plateau environment simulation tests, and relates to a diesel engine crankcase and lubricating oil temperature control circulation integrated plateau air pressure simulation device, which is used for a diesel engine plateau environment simulation laboratory test system to perform diesel engine plateau environment simulation test detection.
Background
In order to meet the working requirements of different regions and different environments, the diesel engine used as the vehicle power needs to improve the environmental adaptability of the diesel engine, especially the adaptability of high-altitude regions. In order to enhance and improve the adaptability of the high altitude environment of the diesel engine, internal combustion engine research and development enterprises or manufacturers consume a great deal of energy and financial resources to carry out plateau adaptability verification of the diesel engine, and meanwhile, in order to enhance the product competitiveness of the enterprises and seize the market share, reduce the research and development cost and shorten the research and development period as much as possible, plateau environment simulation laboratories are widely applied to the research and development design verification links of the diesel engine.
The plateau environment simulation test room is complex in system and high in technical content, foreign imported system equipment is introduced at present, and the plateau environment simulation test room built at present at home is only limited to simulation of an air inlet and exhaust system of a diesel engine due to huge investment cost, but not a cabin capable of placing the whole diesel engine in the plateau environment. Although the purpose of plateau environment simulation is achieved by the plateau environment simulation test room, the plateau environment simulation test room is different from the actual plateau environment, and the adaptability of the plateau environment of the diesel engine cannot be fully and comprehensively evaluated.
Disclosure of Invention
In view of the above, the present invention is directed to a diesel engine crankcase and lubricating oil temperature control cycle integrated plateau pressure simulation apparatus, which is combined with a test system to enable a plateau environment simulation laboratory to simulate a real plateau on-site pressure state, so as to realize a real plateau environment simulation test.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a diesel engine crankcase and lubricating oil temperature control circulation integrated plateau air pressure simulation device comprises a vacuum pump, a gas pressure stabilizing tank, a lubricating oil tank, an electric three-way valve, a tubular heat exchanger, a gear oil pump, an oil filter, an electric regulating valve and a water filter; one ends of the vacuum pump, the gas pressure stabilizing tank, the lubricating oil tank, the electric three-way valve and the tube heat exchanger are sequentially communicated through a pipeline, and two inlets of the electric three-way valve are respectively connected with one ends of the oil filter and the tube heat exchanger; the other end of the oil filter is connected to a system oil inlet interface B of a lubricating oil outlet of the diesel engine through a pipeline valve QF 2; the lubricating oil tank is also provided with a first branch, a second branch, a third branch and a fourth branch, the first branch is connected with a respirator interface C of the diesel engine through a pipeline, and the second branch is connected with an oil supplementing port G of the lubricating oil tank through a pipeline valve QF6, a gear oil pump and a pipeline valve QF 4; the third branch is connected with a pre-lubricating oil pressing port H of the diesel engine through a pipeline valve QF3, a gear oil pump and a pipeline valve QF5, and the fourth branch is connected with an oil outlet interface A of the system through a pipeline valve QF1 and used for supplying oil to the diesel engine; the vacuum pump is also connected with an oil-gas discharge port D, the gas pressure stabilizing tank is connected with an air inlet compensation port I through an electric regulating valve, and the gas pressure stabilizing tank is connected with a waste oil discharge port J through a pipeline valve QF 7; and two ends of a cooling water pipeline of the tube array heat exchanger are respectively connected with a cooling water inlet E and a cooling water outlet F.
Furthermore, a water filter is arranged on a pipeline where the cooling water inlet E is located.
Further, oil-gas separators are arranged in the lubricating oil tank and the gas pressure stabilizing tank.
Compared with the prior art, the invention has the following advantages:
(1) the simulator of the invention ensures that the plateau environment simulation laboratory only provided with diesel engine intake and exhaust simulation has the simulation capability of a plateau environment chamber, is sound and makes up the defects of the existing diesel engine environment simulation test technology, and powerfully supports the development of the diesel engine test technology.
(2) The device greatly reduces the construction cost of the laboratory while ensuring the technical state of environmental simulation; the plateau environment adaptability research of diesel engine research and development enterprises is facilitated, the plateau environment adaptability of the diesel engine is improved, a large number of on-site environment verification tests are reduced, and the investment of development expenditure is greatly reduced.
(3) The device has clear structure and low design and manufacturing cost, can be quickly integrated into a laboratory system, is simple to apply and operate, and is convenient to popularize and use.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a diesel engine crankcase and lubricating oil temperature control circulation integrated plateau air pressure simulator according to an embodiment of the present invention.
Description of reference numerals:
1: a vacuum pump; 2: a gas surge tank; 3: a lubricating oil tank; 4: an electric three-way valve; 5: a shell and tube heat exchanger; 6: a gear oil pump; 7: an oil filter; 8: an electric control valve; 9: a water filter.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, the plateau air pressure simulator is formed by connecting a vacuum pump 1, a gas pressure stabilizing tank 2, a lubricating oil tank 3, an electric three-way valve 4, a tube heat exchanger 5, a gear oil pump 6, an oil filter 7, an electric regulating valve 8 and a water filter 9 through pipelines; and the device is provided with a system oil outlet interface A, a system oil inlet interface B, a diesel engine respirator interface C, an oil-gas discharge port D, a cooling water inlet E, a cooling water outlet F, a lubricating oil tank oil supplementing port G, a diesel engine pre-lubricating oil pressing port H, an air inlet compensation port I and a waste oil discharge port J.
Specifically, one ends of the vacuum pump 1, the gas pressure stabilizing tank 2, the lubricating oil tank 3, the electric three-way valve 4 and the tube heat exchanger 5 are sequentially communicated through a pipeline, and one inlet of the electric three-way valve 4 is simultaneously connected with the oil filter 7 and the other end of the tube heat exchanger 5; the other end of the oil filter 7 is connected with a system oil inlet interface B for connecting a lubricating oil outlet of the diesel engine through a pipeline valve QF 2;
the lubricating oil tank 3 is also provided with a first branch, a second branch, a third branch and a fourth branch, the first branch is connected with a diesel respirator interface C through a pipeline, and the second branch is connected with a lubricating oil tank oil supplementing port G through a pipeline valve QF6, a gear oil pump 6 and a pipeline valve QF 4; the third branch is connected with a pre-lubrication oil port H of the diesel engine through a pipeline valve QF3, a gear oil pump 6 and a pipeline valve QF 5; the fourth branch is connected to the system oil outlet interface A through a pipeline valve QF1 and used for supplying oil to the diesel engine;
the vacuum pump 1 is also connected with an oil-gas discharge port D, the gas pressure stabilizing tank 2 is connected with an air inlet compensation port I through an electric regulating valve 8, and the gas pressure stabilizing tank 2 is connected with a waste oil discharge port J through a pipeline valve QF 7;
two ends of a cooling water pipeline of the tubular heat exchanger 5 are respectively connected with a cooling water inlet E and a cooling water outlet F; and a water filter 9 is arranged on the pipeline where the cooling water inlet E is positioned.
And oil-gas separators are respectively arranged in the lubricating oil tank 3 and the gas pressure stabilizing tank 2 to fully separate oil-gas mixtures.
The temperature control circulation of the lubricating oil of the diesel engine and the plateau air pressure simulation of the oil supply states of a crankcase and the lubricating oil of the diesel engine can be realized through the components and the reserved interfaces.
The device has the following specific operation and working processes:
oil supplement of the lubricating oil tank 3: an external oil supply pipeline is connected to an oil supplementing port G of the lubricating oil tank, pipeline valves QF4 and QF6 are opened, pipeline valves QF1, QF3 and QF5 are closed, then the gear oil pump 6 supplies power to operate, external lubricating oil is conveyed to the lubricating oil tank 3 through the gear oil pump 6, after the liquid level reaches the required scale, the gear oil pump 6 is closed, and pipeline valves QF4 and QF6 are closed.
Pre-lubricating and oil supplying of a diesel engine: the method comprises the steps of connecting a pre-lubricating oil port H of the diesel engine with an oil supply port of the diesel engine through a pipeline, then closing pipeline valves QF1, QF4 and QF6, opening pipeline valves QF3 and QF5, then powering on and operating a gear oil pump 6, sending lubricating oil pressure in a lubricating oil tank 3 to the diesel engine by using the gear oil pump 6, stopping the power supply to stop the gear oil pump 6 after the oil pressure reaches a required value, and then closing pipeline valves QF3 and QF 5.
Diesel engine lubricating oil supply cycle: and the system oil outlet interface A and the system oil inlet interface B are respectively connected with a lubricating oil supply port and an oil outlet of the diesel engine by pipelines, and then pipeline valves QF1 and QF2 are opened to start the ignition operation of the diesel engine. The lubricating oil in the lubricating oil tank 3 enters the diesel engine under the pumping of the oil pump of the diesel engine and returns to the lubricating oil tank 3 under the conveying of the oil return pump of the diesel engine.
Controlling the temperature of the lubricating oil of the diesel engine: when the diesel engine works, according to a lubricating oil temperature control strategy, the lubricating oil discharged from the diesel engine body is determined by the electric three-way valve 4 whether to return to the lubricating oil tank 3 through the tubular heat exchanger 5. When the temperature of the lubricating oil exceeds the control value, the lubricating oil enters the tube heat exchanger 5 after passing through the oil filter 7, and returns to the lubricating oil tank 3 through the electric three-way valve 4 after the temperature reduction heat exchange is completed in the tube heat exchanger 5. On the contrary, when the temperature of the lubricating oil is within the control value range, the lubricating oil will be returned to the lubricating oil tank 3 directly through the electric three-way valve 4 after passing through the oil filter 7.
And (3) oil gas drainage of a diesel engine crankcase: utilize the pipeline to be connected diesel engine crankcase waste gas escape orifice with diesel engine respirator interface C, the waste gas of diesel engine during operation crankcase will be discharged lubricating-oil tank 3 in constantly.
Plateau air pressure generation simulation: when the diesel engine works, oil gas discharged from a crankcase of the diesel engine and oil gas generated by high-temperature lubricating oil are gathered in the lubricating oil tank 3, and the gathered oil gas passes through the pipeline, passes through the gas pressure stabilizing tank 2 and then is pumped and discharged into the ambient atmosphere through the vacuum pump 1. The pressure balance in the gas surge tank 2 is realized by controlling the displacement of the vacuum pump 1 and the opening degree (supplementary displacement) of the electric control valve 8, thereby realizing the pressure balance in the lubricating oil tank 3.
Oil-gas separation and oil liquid drainage: and oil-gas separators are respectively arranged in the lubricating oil tank 3 and the gas pressure stabilizing tank 2, oil gas continuously flows under the pumping of the vacuum pump 1, the oil-gas separation is continuously carried out, and finally the oil-gas separation is discharged out of the device. When the oil separated from the gas surge tank 2 is accumulated to a certain amount, the oil can be discharged by opening the pipe valve QF 7.
The waste gas of the diesel engine crankcase can be completely discharged into a lubricating oil tank 3 of a diesel engine lubricating oil temperature control circulating system, mixed with oil gas of the lubricating oil temperature control circulating system, supplemented with gas through an electric regulating valve 8, finally subjected to pressure stabilization in a gas pressure stabilizing tank 2 and pumped into the ambient atmosphere through a vacuum pump 1, and the purpose of plateau air pressure simulation in the diesel engine crankcase and the diesel engine lubricating oil temperature control circulating system is achieved.
The exhaust gas discharge port of the diesel engine crankcase and the lubricating oil temperature control circulating system of the diesel engine establish a negative pressure environment in the lubricating oil tank 3, so that the exhaust gas discharge port and the lubricating oil temperature control circulating system of the diesel engine synchronously achieve the aim of plateau environment air pressure simulation, and the simulation difference is avoided.
The plateau air pressure generation of the diesel engine crankcase and the diesel engine lubricating oil temperature control circulation system is realized by an integrated monitoring and control strategy based on the pressure stabilization of the gas pressure stabilizing tank 2, the air inlet supplement of the electric regulating valve 8 and the air extraction control of the vacuum pump 1, and is a control core for realizing plateau environment air pressure simulation of the whole device.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. Diesel engine crankcase and lubricating oil control by temperature change circulation integrated form plateau atmospheric pressure analogue means, its characterized in that: the device comprises a vacuum pump, a gas pressure stabilizing tank, a lubricating oil tank, an electric three-way valve, a tube heat exchanger, a gear oil pump, an oil filter, an electric regulating valve and a water filter;
one ends of the vacuum pump, the gas pressure stabilizing tank, the lubricating oil tank, the electric three-way valve and the tube heat exchanger are sequentially communicated through a pipeline, and two inlets of the electric three-way valve are respectively connected with the oil filter and the other end of the tube heat exchanger; the other end of the oil filter is connected to a system oil inlet interface B of a lubricating oil outlet of the diesel engine through a pipeline valve QF 2;
the lubricating oil tank is also provided with a first branch, a second branch, a third branch and a fourth branch, the first branch is connected with a respirator interface C of the diesel engine through a pipeline, and the second branch is connected with an oil supplementing port G of the lubricating oil tank through a pipeline valve QF6, a gear oil pump and a pipeline valve QF 4; the third branch is connected with a pre-lubrication oil port H of the diesel engine through a pipeline valve QF3, a gear oil pump and a pipeline valve QF 5; the fourth branch is connected with the system oil outlet interface A through a pipeline valve QF1 and used for supplying oil to the diesel engine;
the vacuum pump is also connected with an oil-gas discharge port D, the gas pressure stabilizing tank is connected with an air inlet compensation port I through an electric regulating valve, and the gas pressure stabilizing tank is connected with a waste oil discharge port J through a pipeline valve QF 7;
and two ends of a cooling water pipeline of the tube array heat exchanger are respectively connected with a cooling water inlet E and a cooling water outlet F.
2. The diesel engine crankcase and lubricating oil temperature control circulation integrated plateau air pressure simulator of claim 1, wherein: and a water filter is arranged on the pipeline where the cooling water inlet E is positioned.
3. The diesel engine crankcase and lubricating oil temperature control circulation integrated plateau air pressure simulator of claim 1, wherein: and oil-gas separators are respectively arranged in the lubricating oil tank and the gas pressure stabilizing tank.
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| CN202110680058.5A CN113418714B (en) | 2021-06-18 | 2021-06-18 | Diesel engine crankcase and lubricating oil temperature control circulation integrated plateau air pressure simulation device |
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| CN202110680058.5A CN113418714B (en) | 2021-06-18 | 2021-06-18 | Diesel engine crankcase and lubricating oil temperature control circulation integrated plateau air pressure simulation device |
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