CN110006657B - Damping rack applied to fatigue oscillation testing machine of internal combustion engine parts - Google Patents
Damping rack applied to fatigue oscillation testing machine of internal combustion engine parts Download PDFInfo
- Publication number
- CN110006657B CN110006657B CN201910374590.7A CN201910374590A CN110006657B CN 110006657 B CN110006657 B CN 110006657B CN 201910374590 A CN201910374590 A CN 201910374590A CN 110006657 B CN110006657 B CN 110006657B
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- frame
- channel steel
- longitudinal
- steel
- experiment table
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- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 230000010355 oscillation Effects 0.000 title claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 11
- 238000013016 damping Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 96
- 239000010959 steel Substances 0.000 claims abstract description 96
- 238000002474 experimental method Methods 0.000 claims abstract description 25
- 230000035939 shock Effects 0.000 claims abstract description 12
- 239000006096 absorbing agent Substances 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 239000010687 lubricating oil Substances 0.000 abstract description 2
- 238000005452 bending Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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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
-
- 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
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/027—Specimen mounting arrangements, e.g. table head adapters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention aims to provide a damping rack applied to a fatigue oscillation testing machine for parts of an internal combustion engine, which comprises a channel steel underframe, an experiment table top, a channel steel support frame and a platform steel plate; the bottom 23 shock absorbers play a role in bearing pressure and oscillating load; the hydraulic bolt holes of the experiment table are used for fixing the oscillation testing machine, compared with the common bolt connection, the hydraulic bolts are less affected by the oscillation load and have more advantages compared with the common bolt connection; the trapezoid groove is used for installing the test fixture. The invention can bear the load of about 20 tons, the steel plate with stripes is adopted as the platform steel plate, and even if the lubricating oil leaks on the steel plate, the steel plate can keep larger friction force, thereby being convenient for experimental staff to install and detach the test piece. The design of the positioning tool replaces a common welding mode, and the positioning tool can move among bolt holes of the channel steel so as to replace different types of experiment table tops and adjust the positions of the experiment table tops.
Description
Technical Field
The invention relates to an internal combustion engine test device, in particular to a shock absorption bench of a test machine.
Background
The connecting rod and the crankshaft are used as core parts of the engine, and the structure is relatively complex. With the continuous progress of the internal combustion engine technology, the requirements of people on the reliability of engine parts are higher and higher, and the reliability of the connecting rod assembly and the crankshaft determines the service life of the internal combustion engine to a great extent. In particular during the operation of the internal combustion engine, they are subjected to complex alternating loads. For this reason, excellent fatigue characteristics of the connecting rod and the crankshaft are indispensable.
Shaft bending can cause tilting of the piston relative to the cylinder, the bearing relative to the journal; out-of-round holes can cause the bearing to lose normal fit; once the movable connecting rod bolt of the connecting rod body is broken in the running process of the engine, the machine is seriously damaged, and serious accidents are caused. In order to ensure the fatigue strength of the connecting rod assembly, the connecting rod assembly is subjected to a pull-press test of reciprocating oscillation load, the working state of the engine is simulated, and the durable bearing capacity and the fatigue limit of the connecting rod assembly under specific structural, material and manufacturing process conditions are checked.
The bending fatigue strength of the crankshaft is ensured, and the method is an important measure for ensuring the working reliability and the service life of the internal combustion engine. The bending fatigue test of the crankshaft is the most intuitive method for evaluating the strength and the reliability of the crankshaft, and is a method for simulating the working state of the crankshaft in an engine, applying periodic alternating load to the crankshaft on a test bed and checking the durable bearing capacity and the fatigue limit of the crankshaft under specific structural, material and manufacturing process conditions.
Disclosure of Invention
The invention aims to provide a damping rack applied to a fatigue oscillation testing machine for parts of an internal combustion engine, which solves the problems that the rack of the conventional fatigue oscillation testing machine cannot bear a large load of reciprocating oscillation and a floor slab bears excessive vibration.
The purpose of the invention is realized in the following way:
the invention relates to a damping rack applied to a fatigue oscillation testing machine of parts of an internal combustion engine, which is characterized in that: the experimental bench comprises a channel steel underframe, an experimental bench, a channel steel support frame and a platform steel plate; the channel steel underframe comprises a first transverse frame, a second transverse frame, a first longitudinal long frame, a second longitudinal long frame, a first longitudinal short frame, a second longitudinal short frame, a third longitudinal short frame, a fourth longitudinal short frame, a sixth longitudinal short frame, a seventh longitudinal short frame and a ninth longitudinal short frame, wherein the first transverse frame, the second longitudinal long frame, the first longitudinal long frame, the second longitudinal short frame, the third longitudinal short frame, the fourth longitudinal short frame and the seventh longitudinal short frame are sequentially arranged in the longitudinal direction; the platform steel plate comprises first-sixth steel plates, wherein the first-sixth steel plates are connected together according to a structure of two rows of three steel plates in each row, and rectangular notch grooves for mounting and adjusting positioning tools are processed in the first-sixth steel plates; the channel-section steel support frame is fixed in experiment mesa below, and experiment mesa is located platform steel sheet top, and the platform steel sheet is fixed on the channel-section steel chassis, and the channel-section steel chassis is connected through the bolt hole on the channel-section steel chassis to the locating tool lower extreme, and the upper end pastes in experiment mesa below, and the position of locating tool changes along with the position of different bolt holes on the channel-section steel chassis.
The invention may further include:
1. the floor support comprises a support unit, wherein the support unit comprises a cross beam, a stand column bottom plate and a support frame base, two ends of the stand column are respectively connected with the cross beam and the stand column bottom plate, and the stand column bottom plate is fixed on the support frame base; the crossbeam sets up in the floor below, and the channel-section steel underframe sets up in the floor top, installs the bumper shock absorber between channel-section steel underframe and the floor.
2. Be provided with the hydraulic pressure bolt hole on the experiment mesa, trapezoidal slot is seted up to the upper plane of experiment mesa.
3. The upper planes of the first to sixth steel plates of the platform steel plate are provided with stripes.
The invention has the advantages that:
1. the bending resistance of the groove steel frame is strong, so that the damping rack has good loading capacity and can bear about 20 tons of load.
2. The 23 shock absorbers at the bottom share the heavy reciprocating load, and play a good role in vibration reduction.
3. The earrings welded on the side edges of the channel steel underframe are favorable for dragging and lifting, and the damping rack is convenient to mount.
4. The platform steel plate adopts a steel plate with stripes, and even if lubricating oil leaks on the platform steel plate, the platform steel plate can maintain larger friction force, so that the test piece can be conveniently installed and detached by experimental staff.
5. The design of the positioning tool replaces a common welding mode, and the positioning tool can move among bolt holes of the channel steel so as to replace different types of experiment table tops and adjust the positions of the experiment table tops.
6. If the experimental bench is replaced or adjusted, the experimental bench can be replaced or adjusted together with the channel steel bracket without detaching the channel steel bracket and the experimental bench separately.
7. The hydraulic bolt hole is processed on the experiment table, and compared with a common bolt, the hydraulic bolt is less affected by the oscillating load. And the corrosion of greasy dirt to the thread and the damage of oscillating load to the thread are avoided.
8.6 trapezoidal mounting grooves are processed on the experiment table, and the experiment clamp of the crank shaft, the connecting rod and other parts is inserted through the sliding groove and fixed through the locating pin.
9. The attached floor support frame plays a role in bearing the load of the floor, and the support of most types of floors can be realized by adjusting the height of the stand column.
Drawings
FIG. 1 is a block diagram of a shock absorbing bench;
FIG. 2 is a bolt hole position profile of a channel steel chassis;
FIG. 3 is a bolt hole position profile of a channel steel support frame;
FIG. 4 is a schematic structural view of a floor support;
fig. 5 is a schematic view of the structure of the shock absorbing rack and the floor supporting frame.
Detailed Description
The invention is described in more detail below, by way of example, with reference to the accompanying drawings:
referring to fig. 1-5, the invention comprises a channel steel underframe 1, a shock absorber 2, a platform steel plate 3, a positioning tool 4, a channel steel supporting frame 5, an experiment table top 6, a hydraulic bolt hole 7 and a trapezoid groove 8.8 earrings are welded on the channel steel underframe 1, so that the hanging and placing are convenient. The 23 shock absorbers 2 are fixedly connected to the channel steel underframe by M20 bolts according to the bolt hole positions of the channel steel underframe in FIG. 2. 6 steel sheets 3 with lines are welded on the channel steel underframe, and the steel sheets with lines are processed into rectangular notch grooves, so that the positioning tool 4 is convenient to install, adjust and detach.
Referring to fig. 2, the channel steel chassis 1 is provided with bolt holes according to fig. 2, which facilitate the installation of the positioning tool 4 afterwards. Several bolt holes are reserved on the channel steel underframe 1 so as to facilitate the disassembly and position adjustment of the positioning tool 4. One end of the positioning tool 4 is fixedly connected to the channel steel underframe 1 through an M20 bolt, and the other end of the positioning tool is fixedly connected to the channel steel supporting frame 5 through an M20 bolt, wherein bolt holes are machined in bolt hole machining positions of the channel steel supporting frame 5 according to the bolt hole positions of the channel steel supporting frame in FIG. 3. The bolt hole mounting position of the channel steel support frame is shown with reference to fig. 3.
The channel steel support frame 5 and the experiment table 6 are welded into a whole, and the experiment table is machined into 6 trapezoid grooves 8, so that the installation of the connecting rod and the crankshaft assembly clamp is facilitated. 4 hydraulic bolt holes 7 are processed on a test table surface, and a fatigue oscillation testing machine is arranged on the test table surface. Compared with a common threaded bolt, the hydraulic bolt has better oil stain resistance, stronger corrosion resistance and better capability of resisting heavy-weight reciprocating oscillation.
Referring to fig. 4, the supporting floor support disclosed by the invention comprises a cross beam 9, a stand column 10, a stand column bottom plate 11, a wedge 12 and a support base 13. The length of the upright post can be adjusted according to the height between the foundation and the floor slab by the support frame, and the I-steel has good bending resistance; the steel wedge iron design has the function of buffering, and the strengthening rib of stand 10 bottom can play the effect of strengthening overall structure.
Referring to fig. 5, fig. 5 is a schematic view of a shock absorbing stage and a floor support frame arrangement, two sets of floor support frames are arranged between the floor and the foundation, and the distance between the two sets of support frames is 2.5m. And then arranging a damping rack and a fatigue oscillation testing machine on the floor slab.
And 8 earrings are welded around the bottom channel steel underframe 1 formed by welding 15 channel steels so as to facilitate dragging. The 23 shock absorbers are fixedly connected below the channel steel underframe 1 by bolts. 6 steel plates 3 with rough lines are welded with the I-shaped steel frame 1 at the bottom. The 8 positioning tools are fixedly connected to the upper surface of the channel steel underframe 1 by bolts according to the position of the finding paper. The channel steel supporting frame 5 formed by welding 13 channel steels is fixedly connected together by bolts and the positioning tool 4. A 195mm thick steel block was used as the test bench 6.4 hydraulic bolt holes were machined on top of the bench top 6. 6 trapezoidal grooves 8 are machined on the laboratory bench top, responsible for the jig insertion.
The groove steel frame chassis is welded in a net shape, three transverse channel steel are arranged, and the longitudinal channel steel is cut into small sections except two sides and welded with the transverse channel steel framework. The upper surface and the lower surface of the whole groove steel frame are provided with bolt holes according to the drawing requirements, the lower surface is fixedly connected with a shock absorber by bolts, and the upper surface is fixedly connected with a positioning tool by bolts. The other end of the positioning tool is fixedly connected with a channel steel support frame through bolts, and the channel steel support frame is welded according to a drawing mode. The lower end bolt of the positioning tool is fixed with the rack, and the upper end bolt is tightly attached to the experiment table top, so that the position of the experiment table top can be moved. And an experiment table surface for placing the fatigue oscillation testing machine is welded with the channel steel frame into a whole. Four hydraulic bolt hole bolt holes are arranged on the chassis according to the drawing size and are used for installing a fatigue oscillation testing machine, and can bear reciprocating oscillation load well. Two sets of floor support frames matched with the damping rack of the fatigue oscillation testing machine are arranged between the floor and the foundation to replace the floor body to bear heavy load.
The invention mainly aims at the damping rack of the low-frequency fatigue oscillation testing machine, and has lower load frequency but larger reciprocating load. Therefore, the invention adopts the channel steel with bending resistance to manufacture the underframe and the supporting frame.
Claims (1)
1. A damping rack applied to a fatigue oscillation testing machine for parts of an internal combustion engine is characterized in that: the experimental bench comprises a channel steel underframe, an experimental bench, a channel steel support frame, a platform steel plate and a floor slab support frame; the channel steel underframe comprises a first transverse frame, a second transverse frame, a first longitudinal long frame, a second longitudinal long frame, a first longitudinal short frame, a second longitudinal short frame, a third longitudinal short frame, a fourth longitudinal short frame, a sixth longitudinal short frame, a seventh longitudinal short frame and a ninth longitudinal short frame, wherein the first transverse frame, the second longitudinal long frame, the first longitudinal long frame, the second longitudinal short frame, the third longitudinal short frame, the fourth longitudinal short frame and the seventh longitudinal short frame are sequentially arranged in the longitudinal direction; the platform steel plate comprises first-sixth steel plates, wherein the first-sixth steel plates are connected together according to a structure of two rows of three steel plates in each row, and rectangular notch grooves for mounting and adjusting positioning tools are processed in the first-sixth steel plates; the channel steel support frame is fixed below the experiment table top, the experiment table top is positioned above the platform steel plate, the platform steel plate is fixed on the channel steel underframe, the lower end of the positioning tool is connected with the channel steel underframe through bolt holes on the channel steel underframe, the upper end of the positioning tool is attached below the experiment table top, and the position of the positioning tool is changed along with the positions of different bolt holes on the channel steel underframe;
the floor supporting frame comprises a supporting unit, wherein the supporting unit comprises a cross beam, a stand column bottom plate and a supporting frame base, two ends of the stand column are respectively connected with the cross beam and the stand column bottom plate, and the stand column bottom plate is fixed on the supporting frame base; the beam is arranged below the floor slab, the channel steel underframe is arranged above the floor slab, and a shock absorber is arranged between the channel steel underframe and the floor slab;
the experiment table top is provided with a hydraulic bolt hole, and the upper plane of the experiment table top is provided with a trapezoid groove;
the upper planes of the first to sixth steel plates of the platform steel plate are provided with stripes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910374590.7A CN110006657B (en) | 2019-05-07 | 2019-05-07 | Damping rack applied to fatigue oscillation testing machine of internal combustion engine parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910374590.7A CN110006657B (en) | 2019-05-07 | 2019-05-07 | Damping rack applied to fatigue oscillation testing machine of internal combustion engine parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110006657A CN110006657A (en) | 2019-07-12 |
| CN110006657B true CN110006657B (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910374590.7A Active CN110006657B (en) | 2019-05-07 | 2019-05-07 | Damping rack applied to fatigue oscillation testing machine of internal combustion engine parts |
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| CN (1) | CN110006657B (en) |
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| CN113546711A (en) * | 2021-06-21 | 2021-10-26 | 上海交通大学 | Dynamic and static dual-mode conversion experiment table and operation method thereof |
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| CN203390492U (en) * | 2013-07-30 | 2014-01-15 | 中国海洋石油总公司 | Suspension supporting platform for detaching and installing large-scale diesel engine crankshaft bearing |
| JP2016033396A (en) * | 2014-07-31 | 2016-03-10 | 特許機器株式会社 | Vibration isolation vibration damping apparatus |
| KR101650523B1 (en) * | 2015-10-19 | 2016-08-23 | (주) 대현목재 | Wood deck plate height adjustment screw is attached via a fixed member that is equipped |
| CN105987800A (en) * | 2015-02-03 | 2016-10-05 | 南车株洲电力机车研究所有限公司 | Vibration test fixture and installation method thereof |
| CN207025395U (en) * | 2017-07-07 | 2018-02-23 | 广州怡和生物科技有限公司 | A kind of all steel central experiment table |
| CN109632344A (en) * | 2019-01-30 | 2019-04-16 | 上汽大众汽车有限公司 | Front cover lock endurance bench test device and method |
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2019
- 2019-05-07 CN CN201910374590.7A patent/CN110006657B/en active Active
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|---|---|---|---|---|
| CN203390492U (en) * | 2013-07-30 | 2014-01-15 | 中国海洋石油总公司 | Suspension supporting platform for detaching and installing large-scale diesel engine crankshaft bearing |
| JP2016033396A (en) * | 2014-07-31 | 2016-03-10 | 特許機器株式会社 | Vibration isolation vibration damping apparatus |
| CN105987800A (en) * | 2015-02-03 | 2016-10-05 | 南车株洲电力机车研究所有限公司 | Vibration test fixture and installation method thereof |
| KR101650523B1 (en) * | 2015-10-19 | 2016-08-23 | (주) 대현목재 | Wood deck plate height adjustment screw is attached via a fixed member that is equipped |
| CN207025395U (en) * | 2017-07-07 | 2018-02-23 | 广州怡和生物科技有限公司 | A kind of all steel central experiment table |
| CN109632344A (en) * | 2019-01-30 | 2019-04-16 | 上汽大众汽车有限公司 | Front cover lock endurance bench test device and method |
Non-Patent Citations (1)
| Title |
|---|
| 单层减震结构模型的振动台试验;赵彤, 张祖光, 钱曙珊, 王金国;油气田地面工程(06);全文 * |
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| CN110006657A (en) | 2019-07-12 |
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