CN112901332A - Method for relieving cavitation erosion of diesel engine body - Google Patents
Method for relieving cavitation erosion of diesel engine body Download PDFInfo
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- CN112901332A CN112901332A CN202110394245.7A CN202110394245A CN112901332A CN 112901332 A CN112901332 A CN 112901332A CN 202110394245 A CN202110394245 A CN 202110394245A CN 112901332 A CN112901332 A CN 112901332A
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- plate
- cooling water
- diesel engine
- water
- engine body
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
- F01P11/028—Deaeration devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the field of diesel engine equipment, and relates to a method for relieving cavitation erosion of a diesel engine body. The method for relieving the cavitation erosion of the diesel engine body comprises the steps that a pressure reduction device is arranged in a shell of the diesel engine body, and the pressure reduction device is provided with a throttling orifice plate and a bursting plate II which are perpendicular to the water flow direction; an exhaust channel communicated with the exhaust pipe is formed between the throttling orifice plate and the crumple plate II; the back of the throttling orifice plate is provided with a bursting plate I; the back of the orifice plate is also provided with fan blades for dispersing water flow; the process is continuously repeated in the operation of the diesel engine, the gas content in the cooling water is gradually reduced, and after the air bubbles are repeatedly discharged, the gas content in the cooling water can be kept at a lower level, so that the cavitation caused by the repeated collapse of the air bubbles to the water cavity of the engine body is limited. The invention has simple structure and convenient disassembly and assembly; the gas content in water can be continuously reduced in the operation of the diesel engine, and the cavitation erosion caused by bubble collapse to a water cavity and the like can be effectively relieved under the condition that the sealing of a cooling system is good.
Description
Technical Field
The invention belongs to the field of diesel engine equipment, and particularly relates to a method for relieving cavitation erosion of a diesel engine body.
Background
After the diesel engine is used for a period of time, cooling water circulating in a cooling system can still corrode a contact part even if a rust inhibitor is added; the reason is that the gas dissolved in the cooling water is separated out at low pressure under the vibration action caused by the operation of the diesel engine, and then the gas bubbles are collapsed at high pressure; the water cavity of the machine body and the outer wall of the cylinder sleeve and the like can form pockmark-shaped and needle-shaped holes under the impact and high temperature action generated when bubbles are collapsed. This process is constantly repeated under the pressure variation that the diesel engine vibration caused, thereby the bubble continuously causes destruction to organism water cavity, cylinder liner outer wall etc..
For cavitation caused by bubbles, due to overhigh maintenance cost, the material performance is improved in design, so that the service lives of parts such as a machine body, a cylinder sleeve and the like are prolonged. If the gas dissolved in the cooling water can be reduced, the cavitation erosion speed can be effectively reduced, so that the service lives of parts such as a machine body, a cylinder sleeve, a cooling water pipe and the like are prolonged, and the requirements on materials are reduced.
Disclosure of Invention
Aiming at cavitation caused by bubbles in cooling water, the invention provides a method for relieving cavitation of a diesel engine body.
The invention adopts the following technical scheme for achieving the purpose:
a method for relieving cavitation erosion of a diesel engine body is characterized in that a pressure reduction device is arranged in a shell of the diesel engine body, so that the gas content in cooling water can be reduced, and cavitation erosion harm is reduced; the pressure reduction device is provided with a throttling hole plate for reducing pressure of cooling water and a breakdown plate II which is arranged in parallel to the throttling hole plate; the throttling orifice plate and the bursting plate II are both arranged perpendicular to the water flow direction; an exhaust channel communicated with an exhaust pipe is formed between the throttling orifice plate and the crumple plate II; the back surface of the throttling orifice plate is provided with a burst plate I, and the burst plate I is used for bursting water flow subjected to pressure reduction by the throttling orifice plate and then facilitating dissolved gas to be separated out along an exhaust pipe; the back of the orifice plate is also provided with fan blades for dispersing water flow; the water flow firstly reduces the pressure through the throttling orifice plate, so that dissolved gas is favorably separated out, and a small amount of bubbles float upwards and enter the exhaust pipe; because the cooling water flow speed is high, a part of bubbles can not float upwards in time and are collapsed through the collapse plate I and the collapse plate II; a part of gas is still dissolved in the cooling water and enters the next circulation; the process is continuously repeated in the operation of the diesel engine, the gas content in the cooling water is gradually reduced, and after the air bubbles are repeatedly discharged, the gas content in the cooling water can be kept at a lower level, so that the cavitation caused by the repeated collapse of the air bubbles to the water cavity of the engine body is limited.
The bursting plates I and II are respectively provided with densely arranged tapered holes, and when cooling water flows through the bursting plates I and II, the cooling water can be throttled, so that the pressure, direction and flow rate of the cooling water are changed, and the gas in the cooling water can be conveniently separated out; meanwhile, when the water flows through the conical holes in the bursting plate I and the bursting plate II, the flow cross section area of the water flow is changed, and the pressure and the flow speed are changed again, so that the effects of throttling and turbulent flow are achieved, and the water flow is diffused and depressurized; the water flow passes through the first burst plate and the second burst plate in a short time, and the maximum effect of cooling water precipitation can be achieved through repeated changes of pressure and flow speed.
The method for relieving the cavitation erosion of the diesel engine body has the advantages that the device is simple in structure and convenient to disassemble and assemble; the gas content in water can be continuously reduced in the operation of the diesel engine, and the cavitation erosion caused by bubble collapse to a water cavity and the like can be effectively relieved under the condition that the sealing of a cooling system is good.
Drawings
FIG. 1 is a block diagram of the present invention.
In the figure: 1. the air exhaust pipe comprises an exhaust pipe 2, a shell 3, collapse plates I and 4, a throttling orifice plate 5, collapse plates II and 6 and fan blades.
The specific implementation mode is as follows:
the invention is described in detail with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1, a method for alleviating cavitation of a diesel engine body is to install a pressure reduction device in a shell of the diesel engine body, so that the pressure reduction device can reduce the gas content in cooling water and reduce cavitation damage; the pressure reduction device is provided with a throttling orifice plate 4 for reducing pressure of cooling water and a breakdown plate II 5 arranged in parallel with the throttling orifice plate; the throttling orifice plate 4 and the bursting plate II 5 are both arranged perpendicular to the water flow direction; an exhaust channel communicated with an exhaust pipe is formed between the throttling orifice plate 4 and the collapse plate II 5; the back surface of the throttling orifice plate is provided with a burst plate I3, and the burst plate I3 is used for bursting water flow subjected to pressure reduction by the throttling orifice plate so as to be beneficial to separation of dissolved gas along the exhaust pipe 1; the back of the orifice plate is also provided with fan blades 6 for dispersing water flow; the water flow firstly reduces the pressure through the throttling orifice plate, so that dissolved gas is favorably separated out, and a small amount of bubbles float upwards and enter the exhaust pipe; because the cooling water flow speed is high, a part of bubbles can not float upwards in time and are collapsed through the collapse plate I and the collapse plate II; a part of gas is still dissolved in the cooling water and enters the next circulation; the process is continuously repeated in the operation of the diesel engine, the gas content in the cooling water is gradually reduced, and after the air bubbles are repeatedly discharged, the gas content in the cooling water can be kept at a lower level, so that the cavitation caused by the repeated collapse of the air bubbles to the water cavity of the engine body is limited.
The collapse plates I3 and II 5 are provided with densely arranged tapered holes, when cooling water flows through the collapse plates, the densely arranged tapered holes are also formed in the collapse plates I and II, and when the cooling water flows through the collapse plates I and II, the cooling water can be throttled, so that the pressure, direction and flow rate of the cooling water are changed, and the gas in the cooling water can be separated out conveniently; meanwhile, when the water flows through the conical holes in the bursting plate I and the bursting plate II, the flow cross section area of the water flow is changed, and the pressure and the flow speed are changed again, so that the effects of throttling and turbulent flow are achieved, and the water flow is diffused and depressurized; the water flow passes through the first burst plate and the second burst plate in a short time, and the maximum effect of cooling water precipitation can be achieved through repeated changes of pressure and flow speed.
The device comprises an exhaust pipe 1, a shell 2, a throttle orifice plate, fan blades 3 and a crumple plate 4.
The device can be directly arranged at the highest point of the cooling water pipe, and the exhaust pipe 1 is provided with a hose connected with the expansion water tank. When cooling water flows through the throttling orifice plate and the fan blades 3, pressure is reduced, a small amount of bubbles are separated out and float upwards to enter the exhaust pipe 1, and the bubbles which are not discharged in time are scattered through the collapse plate 4. The process can reduce the gas content in the cooling water and relieve cavitation damage caused by bubbles after repeated circulation.
Claims (2)
1. A method for relieving cavitation erosion of a diesel engine body is characterized by comprising the following steps: the method for relieving the cavitation erosion of the diesel engine body comprises the steps of installing a pressure reduction device in a shell of the diesel engine body, so that the gas content in cooling water can be reduced, and the cavitation erosion harm is reduced; the pressure reduction device is provided with a throttling hole plate for reducing pressure of cooling water and a breakdown plate II which is arranged in parallel to the throttling hole plate; the throttling orifice plate and the bursting plate II are both arranged perpendicular to the water flow direction; an exhaust channel communicated with an exhaust pipe is formed between the throttling orifice plate and the crumple plate II; the back surface of the throttling orifice plate is provided with a burst plate I, and the burst plate I is used for bursting water flow subjected to pressure reduction by the throttling orifice plate and then facilitating dissolved gas to be separated out along an exhaust pipe; the back of the orifice plate is also provided with fan blades for dispersing water flow; the water flow firstly reduces the pressure through the throttling orifice plate, so that dissolved gas is favorably separated out, and a small amount of bubbles float upwards and enter the exhaust pipe; because the cooling water flow speed is high, a part of bubbles can not float upwards in time and are collapsed through the collapse plate I and the collapse plate II; a part of gas is still dissolved in the cooling water and enters the next circulation; the process is continuously repeated in the operation of the diesel engine, the gas content in the cooling water is gradually reduced, and after the air bubbles are repeatedly discharged, the gas content in the cooling water can be kept at a lower level, so that the cavitation caused by the repeated collapse of the air bubbles to the water cavity of the engine body is limited.
2. A method of mitigating cavitation in a diesel engine block as recited in claim 1, wherein: the bursting plates I and II are respectively provided with densely arranged tapered holes, and when cooling water flows through the bursting plates I and II, the cooling water can be throttled, so that the pressure, direction and flow rate of the cooling water are changed, and the gas in the cooling water can be conveniently separated out; meanwhile, when the water flows through the conical holes in the bursting plate I and the bursting plate II, the flow cross section area of the water flow is changed, and the pressure and the flow speed are changed again, so that the effects of throttling and turbulent flow are achieved, and the water flow is diffused and depressurized; the water flow passes through the first burst plate and the second burst plate in a short time, and the maximum effect of cooling water precipitation can be achieved through repeated changes of pressure and flow speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110394245.7A CN112901332A (en) | 2021-04-13 | 2021-04-13 | Method for relieving cavitation erosion of diesel engine body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110394245.7A CN112901332A (en) | 2021-04-13 | 2021-04-13 | Method for relieving cavitation erosion of diesel engine body |
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| CN112901332A true CN112901332A (en) | 2021-06-04 |
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| CN202110394245.7A Pending CN112901332A (en) | 2021-04-13 | 2021-04-13 | Method for relieving cavitation erosion of diesel engine body |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439756A (en) * | 2022-01-29 | 2022-05-06 | 靖江市亚太泵业有限公司 | Self-priming gas-liquid separation device of reinforced self-priming multistage centrifugal pump |
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| CN106894883A (en) * | 2017-02-28 | 2017-06-27 | 安徽江淮汽车集团股份有限公司 | A kind of expansion tank and processing method |
| CN109184892A (en) * | 2018-11-05 | 2019-01-11 | 徐州工业职业技术学院 | A kind of automobile cooling system exhaust apparatus |
| CN109488445A (en) * | 2018-12-26 | 2019-03-19 | 十堰楚欣达汽车科技股份有限公司 | A kind of army's vehicle expansion tank |
| CN210396878U (en) * | 2019-07-24 | 2020-04-24 | 合肥昊翔汽车零部件有限公司 | High-safety expansion kettle for automobile |
-
2021
- 2021-04-13 CN CN202110394245.7A patent/CN112901332A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB817944A (en) * | 1957-01-30 | 1959-08-06 | Serck Radiators Ltd | Means for separating occluded air from the jacket cooling water of internal combustion engines |
| GB1026720A (en) * | 1964-04-28 | 1966-04-20 | London Transp Board | Improvements in or relating to vehicle engine cooling systems |
| US4231424A (en) * | 1977-06-22 | 1980-11-04 | Societe Anonyme Des Usines Chausson | Header constituting a pressurizing tank |
| SE0300511D0 (en) * | 2003-02-27 | 2003-02-27 | Scania Cv Publ | Apparatus for separating gas from a liquid medium |
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| CN106762093A (en) * | 2017-02-28 | 2017-05-31 | 安徽江淮汽车集团股份有限公司 | A kind of expansion tank and processing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439756A (en) * | 2022-01-29 | 2022-05-06 | 靖江市亚太泵业有限公司 | Self-priming gas-liquid separation device of reinforced self-priming multistage centrifugal pump |
| CN114439756B (en) * | 2022-01-29 | 2023-02-21 | 靖江市亚太泵业有限公司 | Self-priming gas-liquid separation device of reinforced self-priming multistage centrifugal pump |
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Application publication date: 20210604 |
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