CN112798273A - Machine body part test method for accurately simulating loading of main bearing hole of engine - Google Patents
Machine body part test method for accurately simulating loading of main bearing hole of engine Download PDFInfo
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- CN112798273A CN112798273A CN202011533451.3A CN202011533451A CN112798273A CN 112798273 A CN112798273 A CN 112798273A CN 202011533451 A CN202011533451 A CN 202011533451A CN 112798273 A CN112798273 A CN 112798273A
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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
- G01M13/04—Bearings
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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
The invention provides a test method for a machine body part for accurately simulating loading of a main bearing hole of an engine, which is characterized in that the angle formed by the maximum bearing load direction of the main bearing hole of a main bearing clapboard and the vertical direction of the engine and the numerical value of a load value F are calculated and analyzed, namely the angle formed by the maximum bearing load direction of the main bearing hole of a tested machine body and the vertical direction of the engine and the numerical value of the load value F are obtained. The hydraulic oil is applied to the tops of the left row of nonstandard pistons and the right row of nonstandard pistons by the left row of hydraulic loading devices and the right row of hydraulic loading devices at the same time, and then the resultant force of the loads is transmitted to the nonstandard crankshafts through the left row of connecting rods and the right row of connecting rods, so that the loads of main bearing holes of the tested machine body are applied, and the main bearing partition plates are also applied by the same loads. The invention has the following advantages: the fatigue test method for the engine body part can accurately simulate the maximum load of the main bearing hole of the engine in the real working state; the engine body part fatigue test method can simulate the loads of the engine bearing hole in different directions and sizes.
Description
Technical Field
The invention relates to the technical field of engine tests, in particular to a test method for an engine body component for accurately simulating load loading of a main bearing hole of an engine.
Background
With the continuous improvement of the explosion pressure and the power density of the engine, the reliability of engine parts faces a severe test, the reliability is particularly important when the engine body is used as a framework of the engine, and the reliability can be ensured by not only calculating, analyzing and evaluating the engine in the development stage of the engine but also by the verification of physical stress measurement and fatigue test.
At present, a method for simulating explosive pressure by injecting hydraulic oil into a combustion chamber is generally adopted in engine body part tests, and fatigue examination of an engine body and measurement of the stress of the engine body under dynamic and static loads can be carried out. Aiming at the loading of the test load of the engine body part, the highest explosion pressure of the engine during working is simulated by using hydraulic oil, and the load is transmitted to a main bearing of the engine body along the central line of the cylinder through a connecting rod, so that the load application to the engine body is completed.
However, most of the conventional engines are multi-cylinder engines, the real load borne by a bearing hole is the resultant force under the action of the explosion pressure of each cylinder, and the kinematics and dynamics analysis and research of the crank-link mechanism of the engine show that the maximum load borne by the bearing hole is not in the direction along the central line of the cylinder hole, so that the application of the test load of the conventional engine body is inconsistent with the load of the bearing hole under the real working state of the engine, and the test simulation of the conventional engine body parts cannot reflect the load characteristic of the engine body under the real working state of the engine.
Disclosure of Invention
In view of the above, the present invention is directed to a testing method for a machine body component, which accurately simulates the load loading of a main bearing hole of an engine, and acquires load data of the main bearing hole at different rotation angles of a crankshaft on the basis of the kinematics and dynamics calculation analysis of a crank-link mechanism of the engine.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a test method of an engine body part for accurately simulating load loading of a main bearing hole of an engine is characterized in that a test device of the engine body part is adopted to test the tested engine body, the test device of the engine body part comprises a left row of load applying mechanisms and a right row of load applying mechanisms and a non-standard crankshaft, an included angle is formed between axial center lines of the two rows of load applying mechanisms, the included angle is adjusted by rotating the load applying mechanisms, each row of load applying mechanisms comprises a connecting rod, a non-standard piston and a hydraulic loading device, each hydraulic loading device is connected with one end of the connecting rod through the non-standard piston, the other ends of the two connecting rods are hinged to the non-standard crankshaft together, and the non-standard crankshaft is connected with the tested engine body and;
the test method comprises the following steps: and calculating and analyzing the angle formed by the maximum bearing load direction of the main bearing partition plate main bearing hole and the vertical direction of the engine and the numerical value of the load value F, namely the angle formed by the maximum bearing load direction of the main bearing hole of the tested machine body and the vertical direction of the engine and the numerical value of the load value F. The hydraulic oil is applied to the tops of the left row of nonstandard pistons and the right row of nonstandard pistons by the left row of hydraulic loading devices and the right row of hydraulic loading devices at the same time, and then the resultant force of the loads is transmitted to the nonstandard crankshafts through the left row of connecting rods and the right row of connecting rods, so that the loads of main bearing holes of the tested machine body are applied, and the main bearing partition plates are also applied by the same loads.
Compared with the prior art, the invention has the following advantages:
(1) the fatigue test method for the engine body part can accurately simulate the maximum load of the main bearing hole of the engine in the real working state.
(2) The engine body part fatigue test method can simulate the loads of the engine bearing hole in different directions and sizes.
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 diagram of a main bearing hole bearing load application in an embodiment of the present invention;
FIG. 2 is a schematic view of two rows of right and left load applying mechanisms in an embodiment of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2 (i.e., a schematic structural view of the present invention);
description of reference numerals:
1-a tested body; 2-a connecting rod; 3-a non-standard piston; 4-nonstandard crankshaft; 5-a hydraulic loading device; 6-left 3 cylinders; 7-right 2 cylinders.
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. 1-3, a test method of a machine body part for accurately simulating load loading of a main bearing hole of an engine is characterized in that a machine body part fatigue test device is adopted to test a tested machine body 1, the machine body part fatigue test device comprises a left row of load applying mechanisms, a right row of load applying mechanisms and a non-standard crankshaft 4, an included angle is formed between axial center lines of the two rows of load applying mechanisms, the included angle is adjusted by rotating the load applying mechanisms, each row of load applying mechanisms comprises a connecting rod 2, a non-standard piston 3 and a hydraulic loading device 5, each hydraulic loading device 5 is connected with one end of the connecting rod 2 through the non-standard piston 3, the other ends of the two connecting rods are hinged to the non-standard crankshaft 4 together, and the non-standard crankshaft 4 is axially connected with the tested machine;
the test method comprises the following steps: the angle between the maximum bearing load direction of the main bearing hole of the main bearing clapboard and the vertical direction of the engine and the numerical value of the load value F are calculated and analyzed, namely the angle between the maximum bearing load direction of the main bearing hole of the tested machine body 1 and the vertical direction of the engine and the numerical value of the load value F. The hydraulic oil is applied to the tops of the left and right rows of nonstandard pistons 3 by the left and right rows of hydraulic loading devices 5, and then the resultant force of the loads is transmitted to the nonstandard crankshaft 4 through the left and right rows of connecting rods 2, so that the load of the main bearing hole of the tested machine body 1 is applied, and the main bearing partition plate is applied with the same load.
The test method can also realize the load application of the main bearing hole in different directions and sizes by controlling the load sizes of the left cylinder and the right cylinder.
Example (b):
taking a certain engine body as an example, the maximum bearing load direction of a main bearing hole of the engine body forms an angle of 22 degrees with the vertical direction of the engine through calculation and analysis, and the load value is F.
The method is characterized in that a mode that a main partition plate is close to and loaded in two staggered cylinders simultaneously is adopted in a test, a loading cylinder is a left 3 cylinder 6 and a right 2 cylinder 7, a test bearing partition plate is a second main bearing partition plate, the load direction loaded on a main bearing hole of the second main partition plate is 22 degrees to the vertical direction of an engine by adjusting the load F2 of the left 3 cylinder and the load F1 of the right 2 cylinder, the load value is F, the maximum load borne by the main bearing hole in the actual work of the engine is simulated, the basic load applying principle is shown in figure 1, and the specific test device composition is shown in figures 2-3.
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 (1)
1. The test method for accurately simulating the loading of the main bearing hole load of the engine on the engine body part is characterized by comprising the following steps of: the machine body part fatigue testing device is used for testing a tested machine body (1), and comprises a left row of load applying mechanisms, a right row of load applying mechanisms and a non-standard crankshaft (4), an included angle is formed between axial center lines of the two rows of load applying mechanisms, the included angle is adjusted by rotating the load applying mechanisms, each row of load applying mechanisms comprises a connecting rod (2), a non-standard piston (3) and a hydraulic loading device (5), each hydraulic loading device (5) is connected with one end of each connecting rod (2) through the non-standard piston (3), the other ends of the two connecting rods are hinged to the non-standard crankshaft (4) together, and the non-standard crankshaft (4) is connected with the tested machine body (1) and a main bearing partition plate in a shaft mode;
the test method comprises the following steps: the angle between the maximum bearing load direction of the main bearing hole of the main bearing clapboard and the vertical direction of the engine and the numerical value of the load value F are calculated and analyzed, namely the angle between the maximum bearing load direction of the main bearing hole of the tested machine body (1) and the vertical direction of the engine and the numerical value of the load value F. The hydraulic oil is applied to the tops of the left and right rows of nonstandard pistons (3) by the left and right rows of hydraulic loading devices (5) at the same time, and then the resultant force of the loads is transmitted to the nonstandard crankshaft (4) through the left and right rows of connecting rods (2), so that the application of the main bearing hole load of the tested machine body (1) is realized, and the main bearing partition plate is applied with the same load.
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| CN202011533451.3A CN112798273A (en) | 2020-12-22 | 2020-12-22 | Machine body part test method for accurately simulating loading of main bearing hole of engine |
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| CN202011533451.3A CN112798273A (en) | 2020-12-22 | 2020-12-22 | Machine body part test method for accurately simulating loading of main bearing hole of engine |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11316174A (en) * | 1998-04-30 | 1999-11-16 | Toyota Motor Corp | Testing device of cylinder block bearing part |
| WO2005062014A2 (en) * | 2003-12-19 | 2005-07-07 | Renault Sas | Crankshaft bearing test device |
| KR20080110233A (en) * | 2007-06-15 | 2008-12-18 | 현대자동차주식회사 | Fatigue test apparatus of engine block |
| JP2009264465A (en) * | 2008-04-24 | 2009-11-12 | Toyota Motor Corp | Thrust bearing structure for crankshaft |
| CN111373879B (en) * | 2010-07-29 | 2014-04-30 | 中国兵器工业集团第七0研究所 | Device is applyed to engine organism test load |
| CN209043608U (en) * | 2018-12-16 | 2019-06-28 | 中国航发沈阳发动机研究所 | A kind of multi-angle regulation thrust guiding support device |
| CN110769972A (en) * | 2017-06-14 | 2020-02-07 | 阿尔芬·凯斯勒机械制造有限责任公司 | Method and device for impact treatment of a transition radius of a crankshaft |
| CN210051530U (en) * | 2019-07-22 | 2020-02-11 | 中国航发沈阳发动机研究所 | Combined loading device |
| CN111272424A (en) * | 2020-01-20 | 2020-06-12 | 陕西理工大学 | Water-lubricated bearing on-line monitoring test platform and bearing characteristic test analysis method |
| CN111409855A (en) * | 2020-04-13 | 2020-07-14 | 中国飞机强度研究所 | Fuselage lateral and heading load combined applying device and load applying method |
-
2020
- 2020-12-22 CN CN202011533451.3A patent/CN112798273A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11316174A (en) * | 1998-04-30 | 1999-11-16 | Toyota Motor Corp | Testing device of cylinder block bearing part |
| WO2005062014A2 (en) * | 2003-12-19 | 2005-07-07 | Renault Sas | Crankshaft bearing test device |
| KR20080110233A (en) * | 2007-06-15 | 2008-12-18 | 현대자동차주식회사 | Fatigue test apparatus of engine block |
| JP2009264465A (en) * | 2008-04-24 | 2009-11-12 | Toyota Motor Corp | Thrust bearing structure for crankshaft |
| CN111373879B (en) * | 2010-07-29 | 2014-04-30 | 中国兵器工业集团第七0研究所 | Device is applyed to engine organism test load |
| CN110769972A (en) * | 2017-06-14 | 2020-02-07 | 阿尔芬·凯斯勒机械制造有限责任公司 | Method and device for impact treatment of a transition radius of a crankshaft |
| CN209043608U (en) * | 2018-12-16 | 2019-06-28 | 中国航发沈阳发动机研究所 | A kind of multi-angle regulation thrust guiding support device |
| CN210051530U (en) * | 2019-07-22 | 2020-02-11 | 中国航发沈阳发动机研究所 | Combined loading device |
| CN111272424A (en) * | 2020-01-20 | 2020-06-12 | 陕西理工大学 | Water-lubricated bearing on-line monitoring test platform and bearing characteristic test analysis method |
| CN111409855A (en) * | 2020-04-13 | 2020-07-14 | 中国飞机强度研究所 | Fuselage lateral and heading load combined applying device and load applying method |
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Application publication date: 20210514 |