CN114235417A - Expandable crankshaft system simulation device of internal combustion engine - Google Patents
Expandable crankshaft system simulation device of internal combustion engine Download PDFInfo
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- CN114235417A CN114235417A CN202111482908.7A CN202111482908A CN114235417A CN 114235417 A CN114235417 A CN 114235417A CN 202111482908 A CN202111482908 A CN 202111482908A CN 114235417 A CN114235417 A CN 114235417A
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- crankshaft
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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
- G01M15/02—Details or accessories of testing apparatus
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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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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Testing Of Engines (AREA)
Abstract
The invention discloses an expandable crankshaft system simulation device of an internal combustion engine, which comprises: the mounting platform, the crankshaft group, the servo motor and the crankshaft working condition equivalent assembly; the crankshaft group is driven by a servo motor, the crankshaft working condition equivalent assembly is driven by the crankshaft group, and the crankshaft group and the crankshaft working condition equivalent assembly are both arranged on the mounting platform; the crankshaft group is formed by modularizing more than one crankshaft; the device can simulate the working condition of a crankshaft system in the internal combustion engine truly and meet the requirement of equivalence.
Description
Technical Field
The invention relates to the technical field of internal combustion engine power simulation systems, in particular to an expandable internal combustion engine crankshaft system simulation device.
Background
The crankshaft system is a key component of the internal combustion engine and also a key factor influencing the service life and the working efficiency of the internal combustion engine. The existing relatively common method for researching the crankshaft system of the internal combustion engine mainly comprises the following steps: numerical simulation and experimental test. The numerical simulation method is mainly based on numerical analysis software, model parameters are input, boundary conditions are set, and related parameters are solved; the method has the main defects that the parameter setting of the simulation software is ideal, the influence of partial environmental factors and material characteristic parameters is not considered, and a calculation result has certain deviation from the actual situation. The test bench test is based on the complete machine or the independent system to build the test bench, the vibration noise of the test system is tested, the test result is accurate, the experiment period is long, the cost is high, the changeability is poor, the test flow is complex, and the research progress is seriously influenced.
In recent years, in the process of researching the fatigue strength of a crankshaft, in order to solve the problems of sensor arrangement, practical operation feasibility and the like, the conventional crankshaft test bed for the internal combustion engine is used for independently testing the crankshaft from the internal combustion engine, and a matched lifting method is selected through an electric resonance type fatigue test device; the crankshaft bending fatigue test is studied to study the structural strength, fatigue strength, and other characteristics.
Because the test bed only separates out the crankshaft, does not consider the influence of gas pressure and reciprocating inertia force of actual working conditions, the research on the fatigue strength is inaccurate, has larger deviation with the actual condition, and does not meet the requirement equivalent to the working condition of the actual internal combustion engine crankshaft system.
Disclosure of Invention
In view of this, the invention provides an expandable internal combustion engine crankshaft system simulation device, which can truly simulate the working conditions of a crankshaft system in an internal combustion engine and meet the requirement of equivalence.
The technical scheme of the invention is as follows: an expandable internal combustion engine crankshaft system simulation device comprises: the mounting platform, the crankshaft group, the servo motor and the crankshaft working condition equivalent assembly; the crankshaft group is driven by a servo motor, the crankshaft working condition equivalent assembly is driven by the crankshaft group, and the crankshaft group and the crankshaft working condition equivalent assembly are both arranged on the mounting platform; wherein, the crankshaft group is formed by more than one crankshaft in a modularized way.
Preferably, the crankshaft group is modularized by four crankshafts.
Preferably, the mounting platform comprises: the nitrogen spring support, the motor support and the crankshaft support; the nitrogen spring support is supported on the motor support and the crankshaft support;
the servo motor is supported on the motor bracket, and an output shaft of the servo motor penetrates through the motor bracket and is coaxially fixed with the crankshaft group; one part of the crankshaft working condition equivalent assembly is supported on the nitrogen spring support, and the other part of the crankshaft working condition equivalent assembly is supported on the crankshaft support.
Preferably, the crankshaft operating condition equivalent assembly comprises: the nitrogen spring, the connecting rod, the balance shaft gear and the crankshaft gear;
an output shaft of the servo motor penetrates through a motor support to be coaxially fixed with a crankshaft gear and a crankshaft group in sequence, the balance shaft gear is meshed with the crankshaft gear, meanwhile, the crankshaft gear is coaxially fixed at one end of the balance shaft, the other end of the balance shaft and the other end of the crankshaft group are supported through one crankshaft support, and the butt joint of the crankshaft group and the output shaft of the servo motor and one end of the balance shaft, which is provided with the balance shaft gear, are supported through the other crankshaft support; the balance shaft gear and the crankshaft gear are both positioned between the motor bracket and the crankshaft bracket adjacent to the motor bracket;
one end of each connecting rod is hinged with the corresponding crankshaft in the crankshaft group, and the other end of each connecting rod is hinged with the corresponding piston rod of the nitrogen spring; wherein, the shell of the nitrogen spring is supported by the nitrogen spring bracket.
Preferably, the method further comprises the following steps: a flywheel; the flywheel is coaxially sleeved at one end, far away from the crankshaft gear, of the crankshaft group and used for ensuring the stable rotating speed of the crankshaft group.
Preferably, the mounting platform further comprises: the base, nitrogen gas spring bracket, bent axle support and motor support all support on the base.
Preferably, the base is T type groove base, and bent axle support and motor support all with the T type groove sliding fit that T type groove base upper surface set up to can slide to set for the position department fixed.
Preferably, the mounting platform further comprises: and the elastic supporting feet are used for supporting the base on any platform.
Has the advantages that:
1. according to the crankshaft system simulation device, the servo motor drives the crankshaft group to rotate, the working states of the crankshaft system at different rotating speeds can be simulated by adjusting the rotating speed of the servo motor, and meanwhile, the servo motor has the characteristics of safety, stability and the like, can truly simulate the working conditions of the crankshaft system in the internal combustion engine, and meets the requirement of equivalence; and the number of crankshafts can be expanded due to the modular design of the crankshaft group.
2. The invention can simulate the change of the gas pressure in the real cylinder by the characteristic that the pressure in the nitrogen spring changes periodically along with the motion of the connecting rod; meanwhile, each group of crankshaft-connecting rod-nitrogen spring is a unit module, and the unit modules can be expanded according to requirements, so that the simulation requirements of crankshaft systems of internal combustion engines of different models are met.
Drawings
FIG. 1 is a schematic structural diagram of a crankshaft system simulation device according to the present invention.
The device comprises a nitrogen spring 1, a nitrogen spring 2, a connecting rod 3, a flywheel 4, a crankshaft support 5, a crankshaft group 6, a balance shaft 7, a T-shaped groove base 8, an elastic supporting leg 9, a servo motor 10, a balance shaft gear 11 and a crankshaft gear 12.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The embodiment provides an expandable internal combustion engine crankshaft system simulation device, which can truly simulate the working conditions of a crankshaft system in an internal combustion engine and meet the requirement of equivalence.
As shown in fig. 1, the crankshaft system simulation apparatus includes: the mounting platform, the crankshaft flywheel set, the servo motor 10 and the crankshaft working condition equivalent assembly; the crankshaft flywheel set is driven by a servo motor 10, the crankshaft working condition equivalent assembly is driven by the crankshaft flywheel set, and the crankshaft flywheel set and the crankshaft working condition equivalent assembly are both installed on the installation platform.
In this embodiment, the mounting platform includes: a nitrogen spring support 2, a motor support and a crankshaft support 5;
the crankshaft flywheel set comprises: a crankshaft group 6;
the crankshaft operating condition equivalent assembly comprises: the nitrogen spring 1, the connecting rod 3, the balance shaft 7, the balance shaft gear 11 and the crankshaft gear 12;
the crankshaft system simulation device has the following overall connection relationship:
the servo motor 10 is supported on a motor bracket, an output shaft of the servo motor penetrates through the motor bracket and is coaxially fixed with the crankshaft gear 12, and meanwhile, one end of the crankshaft group 6 is coaxially fixed at the end part of the output shaft of the servo motor 10; the balance shaft gear 11 is meshed with the crankshaft gear 12, meanwhile, the crankshaft gear 12 is coaxially fixed at one end of the balance shaft 7, the other end of the balance shaft 7 and the other end of the crankshaft group 6 are supported by one crankshaft bracket 5, and the butt joint of the crankshaft group 6 and the output shaft of the servo motor 10 and one end of the balance shaft 7, which is provided with the balance shaft gear 11, are supported by the other crankshaft bracket 5; and the balance shaft gear 11 and the crankshaft gear 12 are ensured to be positioned between the motor bracket and the adjacent crankshaft bracket 5;
one end of more than one connecting rod 3 is hinged with the corresponding crankshaft in the crankshaft group 6, and the other end is hinged with the corresponding piston rod of the nitrogen spring 1; the crankshaft group 6 is formed by more than one (preferably four) crankshafts in a modularized mode, and the shell of the nitrogen spring 1 is supported on a crankshaft flywheel, a balance shaft 7, a balance shaft gear 11 and a crankshaft gear 12 through a nitrogen spring support 2.
In this embodiment, the crankshaft flywheel assembly further includes: a flywheel 4; the flywheel 4 is coaxially sleeved at one end of the crankshaft group 6, which is far away from the crankshaft gear 12, and is used for avoiding the unstable rotating speed of the crankshaft group 6.
In this embodiment, the mounting platform further includes: t type groove base 8, nitrogen spring support 2, crankshaft support 5 and motor support all support on T type groove base 8, and crankshaft support 5 and motor support all can slide wantonly in the T type groove of 8 upper surface settings of T type groove base to it is fixed sliding to set for position department.
In this embodiment, the mounting platform further includes: the elastic supporting feet 9 and the four corners of the bottom of the T-shaped groove base 8 can be supported on any platform through the elastic supporting feet 9.
The working principle of the crankshaft system simulation device is as follows:
the servo motor 10 is started to drive the crankshaft gear 12 to rotate and enable the crankshaft flywheel set to rotate synchronously; meanwhile, the crankshaft gear 12 drives the balance shaft 7 to rotate through the balance shaft gear 11, the transmission ratio of the crankshaft gear 12 to the balance shaft gear 11 is set to be 1/2, so that the balance shaft 7 rotates at twice the rotating speed of the crankshaft group 6 to simulate the vibration damping effect of the balance shaft in the internal combustion engine;
one end of the connecting rod 3 is rotated by the crankshaft group 6, and the other end of the connecting rod is connected with the nitrogen spring 1, so that a piston in the nitrogen spring 1 reciprocates in the vertical direction to generate a circulating reciprocating acting force on the crankshaft group 6, and the piston explosion pressure in the internal combustion engine is equivalent.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An expandable internal combustion engine crankshaft system simulation device is characterized by comprising: the mounting platform, the crankshaft group (6), the servo motor (10) and the crankshaft working condition equivalent assembly; the crankshaft group (6) is driven by a servo motor (10), the crankshaft working condition equivalent assembly is driven by the crankshaft group (6), and the crankshaft group (6) and the crankshaft working condition equivalent assembly are both arranged on the mounting platform; wherein, the crankshaft group (6) is formed by more than one crankshaft in a modularized way.
2. An expandable engine crankshaft system simulator according to claim 1, characterized in that said crankshaft group (6) is made up of four crankshaft modules.
3. The expandable internal combustion engine crankshaft system simulator of claim 2, wherein said mounting platform comprises: a nitrogen spring support (2), a motor support and a crankshaft support (5); the nitrogen spring support (2) is supported on the motor support and the crankshaft support (5);
the servo motor (10) is supported on the motor support, and an output shaft of the servo motor penetrates through the motor support and is coaxially fixed with the crankshaft group (6); one part of the crankshaft working condition equivalent assembly is supported on the nitrogen spring support (2), and the other part of the crankshaft working condition equivalent assembly is supported on the crankshaft support (5).
4. The expandable internal combustion engine crankshaft system simulation device of claim 3, wherein the crankshaft operating condition equivalent component comprises: the nitrogen spring (1), the connecting rod (3), the balance shaft (7), the balance shaft gear (11) and the crankshaft gear (12);
an output shaft of the servo motor (10) penetrates through a motor support to be coaxially fixed with a crankshaft gear (12) and a crankshaft group (6) in sequence, the balance shaft gear (11) is meshed with the crankshaft gear (12), meanwhile, the crankshaft gear (12) is coaxially fixed at one end of the balance shaft (7), the other end of the balance shaft (7) and the other end of the crankshaft group (6) are supported through one crankshaft support (5), and the butt joint of the crankshaft group (6) and the output shaft of the servo motor (10) and one end, provided with the balance shaft gear (11), of the balance shaft (7) are supported through the other crankshaft support (5); the balance shaft gear (11) and the crankshaft gear (12) are both positioned between the motor bracket and the adjacent crankshaft bracket (5);
one end of each connecting rod (3) is hinged with a corresponding crankshaft in the crankshaft group (6), and the other end of each connecting rod is hinged with a corresponding piston rod of the nitrogen spring (1); wherein, the shell of the nitrogen spring (1) is supported by the nitrogen spring bracket (2).
5. The expandable engine crankshaft system simulator of claim 4, further comprising: a flywheel (4); the flywheel (4) is coaxially sleeved at one end, far away from the crankshaft gear (12), of the crankshaft group (6) and used for ensuring the stable rotating speed of the crankshaft group (6).
6. The expandable engine crankshaft system simulator of claim 4, wherein said mounting platform further comprises: the base, nitrogen gas spring bracket (2), bent axle support (5) and motor support all support on the base.
7. An expandable simulation device of a crankshaft system of an internal combustion engine as claimed in claim 6, wherein the base is a T-shaped groove base (8), and the crankshaft support (5) and the motor support are in sliding fit with a T-shaped groove arranged on the upper surface of the T-shaped groove base (8) and can be fixed at a set position by sliding.
8. An expandable engine crankshaft system simulator according to claim 6 or 7, wherein the mounting platform further comprises: and the elastic supporting foot (9) is used for supporting the base on any platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111482908.7A CN114235417A (en) | 2021-12-07 | 2021-12-07 | Expandable crankshaft system simulation device of internal combustion engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111482908.7A CN114235417A (en) | 2021-12-07 | 2021-12-07 | Expandable crankshaft system simulation device of internal combustion engine |
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| CN114235417A true CN114235417A (en) | 2022-03-25 |
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| CN202111482908.7A Pending CN114235417A (en) | 2021-12-07 | 2021-12-07 | Expandable crankshaft system simulation device of internal combustion engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114838642A (en) * | 2022-06-23 | 2022-08-02 | 湖北理工学院 | Refrigeration compressor crankshaft detection device and detection method |
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| CN113252352A (en) * | 2021-06-08 | 2021-08-13 | 北京理工大学 | Simulation device and simulation method for crankshaft system of small internal combustion engine |
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- 2021-12-07 CN CN202111482908.7A patent/CN114235417A/en active Pending
Patent Citations (7)
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| CN201051045Y (en) * | 2006-12-05 | 2008-04-23 | 上海电气集团股份有限公司 | Testing platform for simulated crank rotator-bearing system power |
| CN101196431A (en) * | 2006-12-05 | 2008-06-11 | 上海电气集团股份有限公司 | Testing device of crankshaft rotor-bearing system dynamics experimental bench |
| CN102353537A (en) * | 2011-07-12 | 2012-02-15 | 北京理工大学 | Flexural fatigue testing machine for multi-throw crank shaft |
| CN203561507U (en) * | 2013-09-20 | 2014-04-23 | 中国第一汽车股份有限公司 | A simulating crankshaft for engine cylinder body fatigue tests |
| CN205300933U (en) * | 2016-01-19 | 2016-06-08 | 长春工程学院 | Internal -combustion engine piston surface oil film testing platform |
| CN106122370A (en) * | 2016-07-26 | 2016-11-16 | 常州市海润机电有限公司 | A kind of balance system of single cylinder diesel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114838642A (en) * | 2022-06-23 | 2022-08-02 | 湖北理工学院 | Refrigeration compressor crankshaft detection device and detection method |
| CN114838642B (en) * | 2022-06-23 | 2023-08-11 | 湖北理工学院 | Refrigerating compressor crankshaft detection equipment and detection method |
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