CN119492540A - An opposed piston engine oil channel cooling piston target test bench - Google Patents
An opposed piston engine oil channel cooling piston target test bench Download PDFInfo
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- CN119492540A CN119492540A CN202411663985.6A CN202411663985A CN119492540A CN 119492540 A CN119492540 A CN 119492540A CN 202411663985 A CN202411663985 A CN 202411663985A CN 119492540 A CN119492540 A CN 119492540A
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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
- G01M15/042—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12
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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
- G01M13/00—Testing of machine parts
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Abstract
本发明提供了一种对置活塞发动机油道式冷却活塞打靶试验台，包括模拟缸套、活塞头、固定螺栓、油管、分子流量计、出口油道、进口油道、油箱、分母流量计、固定块、活塞体、机油泵。本发明有益效果：能够解决对置活塞发动机油道式冷却活塞打靶效率的问题。
The present invention provides an opposed piston engine oil channel cooling piston shooting test bench, comprising a simulated cylinder sleeve, a piston head, a fixing bolt, an oil pipe, a molecular flow meter, an outlet oil channel, an inlet oil channel, an oil tank, a denominator flow meter, a fixing block, a piston body, and an oil pump. The present invention has the following beneficial effects: it can solve the problem of the oil channel cooling piston shooting efficiency of opposed piston engines.
Description
Technical Field
The invention belongs to the technical field of structural design of internal combustion engines, and particularly relates to an oil duct type cooling piston targeting test bed of an opposite piston engine.
Background
At present, four-stroke engines are commonly used in the field of vehicle and ship power, and have large volume, complex structure, low power ratio and poor compactness. The opposed piston engine omits a cylinder cover and valve structure, and the opposed pistons are arranged in the same cylinder, so that the compactness and the power-weight ratio are greatly improved. The main shaft of the opposed piston engine rotates for one circle, each cylinder does work twice, the working frequency is twice as high as that of the traditional four-stroke engine, the heat load of the engine is greatly increased, and the deformation of the piston is increased. In order to avoid the problem of cylinder pulling caused by piston deformation, the opposite piston engine can adopt a split combined piston, and the piston body and the piston head are connected through a fixing bolt. The lateral thrust formed in the conversion process of the rotary motion and the linear motion only acts on the piston body, and meanwhile, the piston body is far away from a high-temperature area, so that the thermal deformation is small, the cylinder pulling phenomenon is not easy to occur, and a light material can be selected. The piston body and the piston head adopt a split mechanism, the piston head can select materials different from the piston body according to the requirements of high temperature resistance, corrosion resistance and the like, and the total weight of the whole split combined piston can not be greatly increased.
Aiming at the problem of large heat load of the split combined piston head, an oil duct type cooling system is designed, and an inlet oil duct of the piston body is communicated with an outlet oil duct of the piston head. Oil pressure is established through a gap between the piston body and the inner wall of the cylinder, cooling engine oil enters the piston head through an inlet oil duct of the piston body and flows away from the oil outlet, and heat of the piston is taken away, so that the temperature of the cooling engine oil is reduced. The action of cooling oil flowing from the oil passage inlet to the piston head is called 'targeting', and before the engine leaves the factory, the piston is subjected to a targeting test, and the targeting rate is strictly regulated. How to accurately perform a targeting test on an oil-passage-cooled split combined piston is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention aims to provide an oil duct type cooling piston targeting test stand of an opposed piston engine, so as to solve the problem of the targeting efficiency of the oil duct type cooling piston of the opposed piston engine.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
an oil duct type cooling piston targeting test bed of an opposed piston engine comprises a simulated cylinder sleeve, a piston head, a fixing bolt, an oil pipe, a molecular flowmeter, an outlet oil duct, an inlet oil duct, an oil tank, a denominator flowmeter, a fixing block, a piston body and an oil pump;
the piston head and the piston body are horizontally arranged and have the same diameter and are connected through a fixed block and a fixed bolt;
The center line of the cylinder sleeve, the center line of the piston body the center line of the piston head is positioned at the same position;
the outlet oil duct and the inlet oil duct are connected with the oil tank through oil pipes, molecular flow meters are distributed on the oil pipes connected with the oil tank through the outlet oil duct, and denominator flow meters are distributed on the oil pipes connected with the oil tank through the inlet oil duct.
Further, a gap exists between the piston head and the piston body;
gaps exist between the inner wall of the simulated cylinder sleeve and the outer wall of the piston head;
A gap exists between the inner wall of the simulated cylinder sleeve and the outer wall of the piston body;
The gap between the piston head and the piston body simulates the inner wall of the cylinder sleeve and the outer wall of the piston head simulating inner wall of cylinder sleeve and inner wall of piston body is consistent with the engine state.
Further, the piston body is provided with an inlet oil passage, the piston head is provided with an outlet oil passage, and the arrangement position, the shape and the size of the inlet oil passage and the outlet oil passage are consistent with the state of the engine.
Further, the outlet of the inlet oil passage corresponds to the inlet of the outlet oil passage, the cooling engine oil establishes oil pressure through the engine oil pump, flows to the inlet oil passage of the piston body through the oil pipe, strengthens the oil pressure under the action of the clearance, is injected into the piston head through the inlet oil passage of the piston body, and flows back to the oil tank through the outlet oil passage of the piston head.
Furthermore, the collecting flow measured by the molecular flow meter is a molecule, the spraying flow measured by the denominator flow meter is a denominator, the collecting flow and the spraying flow are divided to obtain the targeting efficiency measured by the targeting test, and the cooling engine oil which is not centered in the target is reserved in the oil tank through the oil pipe in the clearance between the piston head and the piston body.
Compared with the prior art, the oil duct type cooling piston targeting test bed for the opposed piston engine has the following advantages:
(1) The invention discloses an oil duct type cooling piston targeting test bed for an opposite piston engine, which solves the problem of the targeting efficiency of the oil duct type cooling piston of the opposite piston engine.
(2) According to the oil duct type cooling piston targeting test bed for the opposed piston engine, the piston heads and the piston bodies are horizontally arranged and have the same diameter and are connected through the fixing blocks and the fixing bolts. The outlet oil duct and the inlet oil duct are connected with the oil tank through oil pipes, molecular flow meters are distributed on the oil pipes connected with the oil tank through the outlet oil duct, and denominator flow meters are distributed on the oil pipes connected with the oil tank through the inlet oil duct. The outlet of the inlet oil passage corresponds to the inlet of the outlet oil passage, the cooling engine oil establishes oil pressure through the engine oil pump, flows to the inlet oil passage of the piston body through the oil pipe, strengthens the oil pressure under the action of the clearance, is sprayed into the piston head through the inlet oil passage of the piston body, and flows back to the oil tank through the outlet oil passage of the piston head. The collecting flow measured by the molecular flow meter is a molecule, the spraying flow measured by the denominator flow meter is a denominator, and the collecting flow and the spraying flow are divided to obtain the targeting efficiency measured by the targeting test.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 is a schematic diagram of a test stand according to an embodiment of the present invention.
Reference numerals illustrate:
1-a simulated cylinder sleeve, 2-a piston head, 3-a fixing bolt, 4-an oil pipe, 5-a molecular flowmeter, 6-an outlet oil duct, 7-an inlet oil duct, 8-an oil tank, 9-a denominator flowmeter, 10-a fixing block, 11-a piston body and 12-an oil pump.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication 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 in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1, the oil duct type cooling piston targeting test bed of the opposed piston engine comprises a simulated cylinder sleeve 1, a piston head 2, a fixing bolt 3, an oil pipe 4, a molecular flowmeter 5, an outlet oil duct 6, an inlet oil duct 7, an oil tank 8, a denominator flowmeter 9, a fixing block 10, a piston body 11 and an oil pump 12. The piston head 2 and the piston body 11 are horizontally arranged and have the same diameter and are connected through the fixed block 10 and the fixed bolt 3. Center line of cylinder sleeve 1, center line of piston body 11 the center line of the piston head 2 is at the same position. The outlet oil duct 6 and the inlet oil duct 7 are connected with the oil tank 8 through the oil pipe 4, the molecular flowmeter 5 is distributed on the oil pipe 4 connected with the oil tank 8 by the outlet oil duct 6, and the denominator flowmeter 9 is distributed on the oil pipe 4 connected with the oil tank 8 by the inlet oil duct 7. A certain gap exists between the piston head 2 and the piston body 11, a certain gap exists between the inner wall of the simulated cylinder sleeve 1 and the outer wall of the piston head 2, and a certain gap exists between the inner wall 1 of the simulated cylinder sleeve and the outer wall of the piston body 11. The clearance between the piston head 2 and the piston body 11, the clearance between the inner wall of the simulated cylinder sleeve 1 and the outer wall of the piston head 2 and the clearance between the inner wall of the simulated cylinder sleeve 1 and the inner wall of the piston body 11 are consistent with the engine state. An inlet oil duct 7 is distributed on the piston body 11, an outlet oil duct 6 is distributed on the piston head 2, and the arrangement positions, shapes and sizes of the inlet oil duct 7 and the outlet oil duct 6 are consistent with the state of the engine. The outlet of the inlet oil passage 7 corresponds to the inlet of the outlet oil passage 6, the cooling engine oil establishes oil pressure through the engine oil pump 12, flows to the inlet oil passage 7 of the piston body 11 through the oil pipe 4, strengthens the oil pressure under the action of the clearance, is injected into the piston head 2 through the inlet oil passage 7 of the piston body 11, and flows back to the oil tank 8 through the outlet oil passage 6 of the piston head 2. The collecting flow measured by the molecular flowmeter 5 is a molecule, the spraying flow measured by the denominator flowmeter 9 is a denominator, and the collecting flow and the spraying flow are divided to obtain the targeting efficiency measured by the targeting test, and the cooling engine oil which is not in the middle is reserved in the oil return tank 8 through the oil pipe 4 in the gap between the piston head 2 and the piston body 11.
The invention solves the problem of the oil duct type cooling piston targeting efficiency of the opposed piston engine. The piston head and the piston body are horizontally arranged and have the same diameter and are connected through the fixing block and the fixing bolt. The outlet oil duct and the inlet oil duct are connected with the oil tank through oil pipes, molecular flow meters are distributed on the oil pipes connected with the oil tank through the outlet oil duct, and denominator flow meters are distributed on the oil pipes connected with the oil tank through the inlet oil duct. The outlet of the inlet oil passage corresponds to the inlet of the outlet oil passage, the cooling engine oil establishes oil pressure through the engine oil pump, flows to the inlet oil passage of the piston body through the oil pipe, strengthens the oil pressure under the action of the clearance, is sprayed into the piston head through the inlet oil passage of the piston body, and flows back to the oil tank through the outlet oil passage of the piston head. The collecting flow measured by the molecular flow meter is a molecule, the spraying flow measured by the denominator flow meter is a denominator, and the collecting flow and the spraying flow are divided to obtain the targeting efficiency measured by the targeting test.
The principle of the exhaust piston motion regulation system of the miller cycle of the rotary table-piston engine is as follows:
as shown in fig. 1, the piston head 2 and the piston body 11 are horizontally arranged and have the same diameter, and are connected through a fixed block 10 and a fixed bolt 3. Center line of cylinder sleeve 1, center line of piston body 11 the center line of the piston head 2 is at the same position. The outlet oil duct 6 and the inlet oil duct 7 are connected with the oil tank 8 through the oil pipe 4, the molecular flowmeter 5 is distributed on the oil pipe 4 connected with the oil tank 8 by the outlet oil duct 6, and the denominator flowmeter 9 is distributed on the oil pipe 4 connected with the oil tank 8 by the inlet oil duct 7. The outlet of the inlet oil passage 7 corresponds to the inlet of the outlet oil passage 6, the cooling engine oil establishes oil pressure through the engine oil pump 12, flows to the inlet oil passage 7 of the piston body 11 through the oil pipe 4, strengthens the oil pressure under the action of the clearance, is injected into the piston head 2 through the inlet oil passage 7 of the piston body 11, and flows back to the oil tank 8 through the outlet oil passage 6 of the piston head 2. The collecting flow measured by the molecular flowmeter 5 is a molecule, the spraying flow measured by the denominator flowmeter 9 is a denominator, and the collecting flow and the spraying flow are divided to obtain the targeting efficiency measured by the targeting test, and the cooling engine oil which is not in the middle is reserved in the oil return tank 8 through the oil pipe 4 in the gap between the piston head 2 and the piston body 11.
Example 1
The invention provides an oil duct type cooling piston targeting test bed which is shown in fig. 1 and comprises a simulated cylinder sleeve 1, a piston head 2, a fixing bolt 3, an oil pipe 4, a molecular flowmeter 5, an outlet oil duct 6, an inlet oil duct 7, an oil tank 8, a denominator flowmeter 9, a fixing block 10, a piston body 11 and an oil pump 12. The diameters of the piston head 2 and the piston body 11 are 50mm, and the piston head and the piston body are horizontally arranged and connected through the fixing block 10 and the fixing bolt 3. Center line of cylinder sleeve 1, center line of piston body 11 the center line of the piston head 2 is at the same position. The outlet oil duct 6 and the inlet oil duct 7 are connected with the oil tank 8 through the oil pipe 4, the molecular flowmeter 5 is distributed on the oil pipe 4 connected with the oil tank 8 by the outlet oil duct 6, and the denominator flowmeter 9 is distributed on the oil pipe 4 connected with the oil tank 8 by the inlet oil duct 7. A certain gap exists between the piston head 2 and the piston body 11, a certain gap exists between the inner wall of the simulated cylinder sleeve 1 and the outer wall of the piston head 2, and a certain gap exists between the inner wall of the simulated cylinder sleeve 1 and the outer wall of the piston body 11. The clearance between the piston head 2 and the piston body 11, the clearance between the inner wall of the simulated cylinder sleeve 1 and the outer wall of the piston head 2 and the clearance between the inner wall of the simulated cylinder sleeve 1 and the inner wall of the piston body 11 are consistent with the engine state. An inlet oil duct 7 is distributed on the piston body 11, an outlet oil duct 6 is distributed on the piston head 2, and the arrangement positions, shapes and sizes of the inlet oil duct 7 and the outlet oil duct 6 are consistent with the state of the engine. The outlet of the inlet oil passage 7 corresponds to the inlet of the outlet oil passage 6, the cooling engine oil establishes oil pressure through the engine oil pump 12, flows to the inlet oil passage 7 of the piston body 11 through the oil pipe 4, strengthens the oil pressure under the action of the clearance, is injected into the piston head 2 through the inlet oil passage 7 of the piston body 11, and flows back to the oil tank 8 through the outlet oil passage 6 of the piston head 2. The engine oil pressure at the engine oil pump 12 is 500kPa, the jet flow measured by the molecular flowmeter 5 is 60g/s, the collecting flow measured by the denominator flowmeter 9 is 76g/s, the two are divided to obtain the targeting efficiency 79% measured by the targeting test, and the cooling engine oil which is not in the middle is reserved in the oil return tank 8 through the oil pipe 4 in the gap between the piston head 2 and the piston body 11.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411663985.6A CN119492540A (en) | 2024-11-20 | 2024-11-20 | An opposed piston engine oil channel cooling piston target test bench |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411663985.6A CN119492540A (en) | 2024-11-20 | 2024-11-20 | An opposed piston engine oil channel cooling piston target test bench |
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| CN119492540A true CN119492540A (en) | 2025-02-21 |
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| CN202411663985.6A Pending CN119492540A (en) | 2024-11-20 | 2024-11-20 | An opposed piston engine oil channel cooling piston target test bench |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884499A (en) * | 2014-03-27 | 2014-06-25 | 潍柴动力股份有限公司 | Piston hitting test stand |
| US20160201544A1 (en) * | 2015-01-14 | 2016-07-14 | Achates Power, Inc. | Piston Cooling For Opposed-Piston Engines |
| CN105938049A (en) * | 2016-07-11 | 2016-09-14 | 滨州学院 | Dynamic visual targeting test platform and test method |
| CN118499106A (en) * | 2024-06-13 | 2024-08-16 | 中国北方发动机研究所 | Oil duct type piston forced cooling system of horizontally opposed piston engine |
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- 2024-11-20 CN CN202411663985.6A patent/CN119492540A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884499A (en) * | 2014-03-27 | 2014-06-25 | 潍柴动力股份有限公司 | Piston hitting test stand |
| US20160201544A1 (en) * | 2015-01-14 | 2016-07-14 | Achates Power, Inc. | Piston Cooling For Opposed-Piston Engines |
| CN105938049A (en) * | 2016-07-11 | 2016-09-14 | 滨州学院 | Dynamic visual targeting test platform and test method |
| CN118499106A (en) * | 2024-06-13 | 2024-08-16 | 中国北方发动机研究所 | Oil duct type piston forced cooling system of horizontally opposed piston engine |
Non-Patent Citations (1)
| Title |
|---|
| 周广猛;杨春浩;陈陆阳;刘瑞林;: "水平对置活塞发动机高空热平衡特性研究", 装备环境工程, no. 10, 25 October 2017 (2017-10-25) * |
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