CN105403406A - Toothed belt fatigue test device - Google Patents
Toothed belt fatigue test device Download PDFInfo
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- CN105403406A CN105403406A CN201510921178.4A CN201510921178A CN105403406A CN 105403406 A CN105403406 A CN 105403406A CN 201510921178 A CN201510921178 A CN 201510921178A CN 105403406 A CN105403406 A CN 105403406A
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- toothed belt
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- fatigue test
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 23
- 238000012360 testing method Methods 0.000 claims abstract description 71
- 239000002828 fuel tank Substances 0.000 claims description 31
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 19
- 239000003921 oil Substances 0.000 description 18
- 239000002243 precursor Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 239000010720 hydraulic oil Substances 0.000 description 9
- 230000001276 controlling effect Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 238000000605 extraction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/023—Power-transmitting endless elements, e.g. belts or chains
-
- 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
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
本发明的实施例提供一种齿形带疲劳试验装置。该齿形带疲劳试验装置包括：转动试验台，被测试的齿形带的两端固定设置在转动试验台上且齿形带张紧；驱动齿轮，其与齿形带啮合并能够驱动齿形带转动；负载活塞缸，其包括活塞杆和缸筒，活塞杆的伸缩端连接在转动试验台上，且活塞杆受转动试验台的驱动而移动，缸筒上设置有与无杆腔连通的油口，油口通过连接管与油箱连接；溢流阀，其设置在油口与油箱之间，并控制无杆腔的排油压力。该齿形带疲劳试验装置具有结构紧凑、使用方便、控制精确等优点，同时能够有效地测试出齿形带的疲劳性能。
An embodiment of the present invention provides a toothed belt fatigue test device. The toothed belt fatigue test device includes: a rotating test bench, on which both ends of the toothed belt to be tested are fixedly arranged and the toothed belt is tensioned; a driving gear, which meshes with the toothed belt and can drive the toothed belt to rotate; a load piston cylinder, which includes a piston rod and a cylinder barrel, the telescopic end of the piston rod is connected to the rotating test bench, and the piston rod is driven to move by the rotating test bench, and an oil port connected to the rodless chamber is provided on the cylinder barrel, and the oil port is connected to the oil tank through a connecting pipe; a relief valve, which is arranged between the oil port and the oil tank, and controls the oil discharge pressure of the rodless chamber. The toothed belt fatigue test device has the advantages of compact structure, easy use, precise control, etc., and can effectively test the fatigue performance of the toothed belt.
Description
Technical field
The present invention relates to wind-power electricity generation utility appliance field, particularly relate to a kind of cog belt fatigue experimental device.
Background technology
Cog belt becomes the one important change oar technology that oar is Large-scale Wind Turbines, because the working environment of aerogenerator is comparatively complicated, and change oar acts frequently, therefore require higher to the fatigue behaviour becoming oar cog belt, the life-span that General Requirements becomes oar cog belt is not less than 20 years.
The method of test cog belt fatigue lifetime can adopt cog belt on-hook to test, and cog belt is arranged in wind power generating set, judges its characteristic by cog belt in the postrun test result of aerogenerator.This kind of method test period is longer, and exists uncertain in test process, lessly in current practical application uses.
At present, the method for test cog belt fatigue lifetime is mainly carried out in laboratory, becomes oar ruuning situation, pull cog belt run with load, and test the fatigue lifetime of cog belt with this by cog belt fatigue experimental device wind-driven generator simulation.Existing test unit load mode hangs up weight at cog belt two ends, rotated and reverse drive cog belt pull-up and transfer weight by driven wheel, tests cog belt fatigue lifetime in the process of so continuous circular flow.But, the load that existing test unit needs hanging comparatively heavy, and load weight adjustment comparatively bothers, and carries out cog belt test and uses inconvenience, make testing efficiency lower.
Summary of the invention
Embodiments of the invention provide a kind of cog belt fatigue experimental device, to solve the awkward problem of existing cog belt fatigue experimental device.
For achieving the above object, embodiments of the invention provide a kind of cog belt fatigue experimental device, comprising: rotate testing table, and the two ends of tested cog belt are fixedly installed on rotates on testing table and cog belt tensioning; Driven wheel, it engages with cog belt and cog belt can be driven to rotate; Load piston cylinder, it comprises piston rod and cylinder barrel, and the telescopic end of piston rod is connected to and rotates on testing table, and piston rod moves by the driving of rotating testing table, and cylinder barrel is provided with the hydraulic fluid port be communicated with rodless cavity, hydraulic fluid port is connected with fuel tank by connecting pipe; Surplus valve, it is arranged between hydraulic fluid port and fuel tank, and controls the oil extraction pressure of rodless cavity.
Further, surplus valve is proportional pressure control valve.
Further, surplus valve is precursor overflow valve, and cog belt fatigue experimental device also comprises Regulation Control valve, and Regulation Control valve is proportional pressure control valve, and the oil-in of proportional pressure control valve is connected with the remote control mouth of precursor overflow valve, and the oil-out of proportional pressure control valve is communicated with fuel tank.
Further, cog belt fatigue experimental device also comprises pressure detector and controller, and pressure detector is arranged between hydraulic fluid port and surplus valve, and is electrically connected with controller, controller is connected with surplus valve, and according to the detected pressures control ratio surplus valve that pressure detector feeds back.
Further, cog belt fatigue experimental device also comprises oil-feed branch road, and one end of oil-feed branch road is connected between hydraulic fluid port and surplus valve, and the other end of oil-feed branch road connects fuel tank, oil-feed branch road is provided with the oil-feed operation valve controlling its break-make.
Further, oil-feed operation valve is retaining valve.
Further, cog belt fatigue experimental device also comprises oil-feed branch road, one end of oil-feed branch road is connected between hydraulic fluid port and surplus valve, the other end of oil-feed branch road connects fuel tank, and oil-feed branch road is provided with two position four-way solenoid valves controlling its break-make, two position four-way solenoid valves have P mouth, T mouth, A mouth and B mouth, P mouth is connected with fuel tank, T mouth is connected with fuel tank, and A mouth is connected with hydraulic fluid port, and B mouth is connected with the oil-out of surplus valve; Two position four-way solenoid valves have left side station and right side station, and when being in left side station, P mouth is communicated with A mouth, and T mouth and B mouth all end, and oil-feed branch road is communicated with; When being in right side station, P mouth and A mouth all end, and T mouth is communicated with B mouth, and oil-feed branch road blocks.
Further, cog belt fatigue experimental device also comprises contact roller, and contact roller is pressed on cog belt, and contact roller and driven wheel are positioned at the both sides of cog belt.
Further, cog belt fatigue experimental device comprises two load piston cylinder groups, each load piston cylinder group comprises at least one load piston cylinder, the link position of two load piston cylinder groups and rotation testing table is positioned at the both sides of the rotating shaft of rotating testing table, surplus valve is at least two, and with load piston cylinder group one_to_one corresponding.
Further, cog belt fatigue experimental device also comprises heating radiator, and heating radiator is arranged between fuel tank and surplus valve.
Further, rotation testing table is sector disk, and cog belt is arranged on the arc surface of sector disk.
Embodiments of the invention cog belt fatigue experimental device, by surplus valve control load piston cylinder to the loading of cog belt, and in the process of driving gear drives cog belt reciprocating rotation, test the fatigue behaviour of cog belt, whether the fatigue behaviour that effectively can test out cog belt is qualified.
Accompanying drawing explanation
Fig. 1 is the structural representation of a cog belt fatigue experimental device of the present invention embodiment;
Fig. 2 is the structural representation of another embodiment of cog belt fatigue experimental device of the present invention;
Fig. 3 is the structural representation of another embodiment of cog belt fatigue experimental device of the present invention.
Description of reference numerals:
1, testing table is rotated; 2, driven wheel; 3, load piston cylinder; 31, hydraulic fluid port; 4, surplus valve; 41, Regulation Control valve; 5, pressure detector; 6, oil-feed operation valve; 61, two position four-way solenoid valves; 7, contact roller; 8, fuel tank; 81, heating radiator; 82, return filter; 9, cog belt.
Embodiment
Be described in detail below in conjunction with the cog belt fatigue test device of accompanying drawing to the embodiment of the present invention.
Fig. 1 is the structural representation of a cog belt fatigue experimental device of the present invention embodiment, and this device can be used for the fatigue behaviour of the cog belt tested in various applied environment, such as wind generating set pitch control cog belt.Certainly, this test unit can also be used for carrying out testing fatigue to other travelling belts, conveyer chain.
As shown in Figure 1, this cog belt fatigue experimental device comprises rotation testing table 1, driven wheel 2, load piston cylinder 3, surplus valve 4.Wherein, rotate testing table 1 for fixing and that tensioning is tested cog belt 9, the two ends of cog belt 9 can be fixedly installed on experiment of rotation platform by concrete mode.Driven wheel 2 rotates for driving cog belt 9, and its profile of tooth is wanted to be meshed with cog belt 9.The effect of load piston cylinder 3 is for cog belt 9 provides load, it comprises piston rod and cylinder barrel, the telescopic end of piston rod is connected to and rotates on testing table 1, can move with the rotation of rotating testing table 1, fill the movement that pressure medium (as hydraulic oil) stops piston rod in cylinder barrel, think that cog belt 9 produces load.Cylinder barrel is provided with the hydraulic fluid port 31 be communicated with rodless cavity, hydraulic fluid port 31 is connected with fuel tank 8 by connecting pipe.Surplus valve 4 is arranged on the connecting line between hydraulic fluid port 31 and fuel tank 8, to provide a back pressure, and then controls the oil extraction pressure of rodless cavity.
By load piston cylinder 3, load is applied to rotation testing table 1, cog belt 9 bringing onto load is moved, to realize bringing onto load test.Such as, when carrying out testing fatigue to cog belt 9, driven wheel 2 in the counterclockwise direction (or clockwise direction) rotates, and drives cog belt 9 to move, and then drives rotation testing table 1 to rotate.Because the piston rod of load piston cylinder 3 is connected with rotation testing table 1 (it can connect or other connected modes for hinged, ball), thus when rotating testing table 1 and rotating, piston rod pressurized, pressure medium in cylinder barrel is flowed out by hydraulic fluid port 31, because when the effect of surplus valve 4 makes cylinder cylinder pressure exceed the oil pressure relief of surplus valve 4, pressure medium just can overflow back fuel tank 8, in cylinder barrel, thus establish a back pressure, for cog belt 9 is applied with a load.
In the present embodiment, rotating testing table 1 is sector disk, and it has arc surface, and the two ends of cog belt 9 are fixedly installed on the two ends of the arc surface of sector disk, rotation testing table 1 can be driven to rotate to make cog belt 9.Sector disk is arranged in other supporting constructions rotationally by rotating shaft.
Preferably, cog belt fatigue experimental device also comprises contact roller 7, it is pressed on cog belt 9, and contact roller 7 and driven wheel 2 are positioned at the both sides of cog belt 9, for compressing cog belt 9, its cog belt 9 is engaged with driven wheel 2 reliably, to ensure that transmission is accurate, and then ensures reliable to the test of cog belt 9 fatigue behaviour.In order to prevent contact roller 7 from disturbing cog belt 9 to move, contact roller 7 is for arrange rotationally, and it can be arranged on by support bar and rotate on testing table 1, also can be arranged in other supporting construction.
In the present embodiment, driven wheel 2 rotates by motor drives, and then drives cog belt 9 to move.Adopt motor-driven mode to take up room little, structure is simple, good reliability.Certainly, in other embodiments, profile of tooth driven wheel 2 can be driven by oil motor or other structures and rotate, as long as guarantee to drive cog belt 9 to move.
Preferably, rotate on testing table 1 and be connected with two groups of load piston cylinder groups, to make all to apply load to cog belt 9 in rotation testing table 1 reciprocating rotation process, its bringing onto load is tested, improves testing efficiency.Each load piston cylinder group comprises at least one load piston cylinder 3.Particularly, load piston cylinder 3 is two, and is positioned at the both sides of the rotating shaft of rotating testing table 1.In other embodiments, if a load piston cylinder group comprises multiple load piston cylinder 3, then multiple load piston cylinder 3 is in parallel, and be connected on rotation testing table 1.
In the present embodiment, the connecting pipe between the hydraulic fluid port 31 of two load piston cylinders 3 and fuel tank 8 is outlet line, and two load piston cylinders 3 are arranged with surplus valve 4, correspondingly to control oil extraction pressure respectively.
In order to can loop test be realized, cog belt fatigue experimental device also comprises oil-feed branch road, one end of described oil-feed branch road is connected between described hydraulic fluid port 31 and described surplus valve 4, the other end of described oil-feed branch road connects fuel tank 8, described oil-feed branch road is provided with the oil-feed operation valve 6 controlling its break-make.The concrete connected mode of oil-feed branch road is not limited to the method shown in Fig. 1, what deserves to be explained is, the quantity of oil-feed operation valve 6 should should one_to_one corresponding with the quantity of load piston cylinder 3 or load piston cylinder group.
Preferably, the oil-feed operation valve 6 controlling oil-feed branch road break-make is retaining valve.In other embodiments, a multi-position valve or multiport valve can be utilized to replace a fairly large number of retaining valve.
As shown in Figure 1, when testing, driven wheel 2 rotates clockwise, then drive cog belt 9 to rotate clockwise together with rotation testing table 1.The piston rod being in the load piston cylinder 3 in left side in Fig. 1 rises, and can produce vacuum in cylinder barrel, and corresponding one-way valve opens, the pressure medium in fuel tank 8 is entered in cylinder barrel by oil-feed branch road.Be in the piston rod pressurized of the load piston cylinder 3 on right side in Fig. 1, cylinder cylinder pressure raises, and corresponding retaining valve is in closed condition, pressure medium can only overflow back fuel tank 8 by surplus valve 4, thus it applies resistance to rotation testing table 1, and then applies load to cog belt 9, makes it be with idling to move.When driven wheel 2 rotates backward, process is contrary, and cog belt 9 is still in the state of loaded work piece, thus achieves and carries test to the band of cog belt 9.
Preferably, conveniently control and regulate the load be applied on cog belt 9, surplus valve 4 is proportional pressure control valve 4.By regulating the oil pressure relief of proportional pressure control valve 4 can control to be applied to the load on cog belt 9, improve reliability and the convenience of test with this.Certainly, surplus valve 4 can be other surplus valve 4, manually adjust oil pressure relief also can, this kind of surplus valve 4 is more suitable for and carries out simulation test to the operating mode of no-load change.
In the present embodiment, drive cog belt 9 cyclically to rotate and reverse by driven wheel 2 (just transferring driven wheel 2 in Fig. 1 to rotate clockwise to drive cog belt 9 to rotate clockwise, be reversed to driven wheel 2 in Fig. 1 to rotate counterclockwise to drive cog belt 9 to rotate counterclockwise), drive rotation testing table 1 cyclically to rotate and reverse, and then the piston rod of control load piston cylinder 3 is cyclically pressed into and pull out cylinder barrel.In this process, can by controlling cog belt 9 cycle rotation when suitable load, then detect cog belt 9 and whether can reach predetermined cycle index, judge that whether the fatigue behaviour of cog belt 9 is qualified.If tested cog belt 9 ruptured before reaching predetermined cycle index, then judge that its fatigue behaviour is defective; If tested cog belt 9 is reaching predetermined cycle index, then judging that its fatigue behaviour is qualified.
Here illustrate, the circulation that cog belt 9 is not limited to the present embodiment with the cycle rotation mode of rotating testing table 1 rotates and reverse, and in other embodiments, also can be other rotating manner.Such as, piston rod and the connected mode of rotating testing table 1 of appropriate design load piston cylinder 3, drive rotation testing table 1 cycle rotation (forward or reverse) to reach cog belt 9, comes the press-in of control piston bar or pull-out cylinder barrel.
As another kind of embodiment, surplus valve 4 is precursor overflow valve, as shown in Figure 2, this cog belt fatigue experimental device also comprises Regulation Control valve 41, and Regulation Control valve 41 is proportional pressure control valve, the oil-in of this proportional pressure control valve is connected with the remote control mouth of precursor overflow valve, and oil-out is communicated with fuel tank 8.This kind of structure goes for the larger operating mode of excess flow, and can regulate oil pressure relief easily.
Can be controlled the oil pressure relief of precursor overflow valve by the pressure controlling Regulation Control valve 41, and Regulation Control valve 41 is proportional pressure control valve, then convenient regulation and control.
Such as: when load piston cylinder 3 piston rod is pressed into cylinder barrel, hydraulic oil in rodless cavity is squeezed out hydraulic fluid port 31, hydraulic oil flows to precursor overflow valve, the leader channel of its small portion hydraulic oil through precursor overflow valve inside, flows to the proportional pressure control valve of the oil pressure relief for controlling precursor overflow valve.When the pressure of hydraulic oil is lower, when not reaching the set pressure of this proportional pressure control valve, this proportional pressure control valve is closed, and precursor overflow valve is in closed condition, and hydraulic oil does not flow to fuel tank 8 by precursor overflow valve; When the pressure of hydraulic oil reaches the oil pressure relief of this proportional pressure control valve, this proportional pressure control valve is opened, and precursor overflow valve is in conducting state, and hydraulic oil can flow to fuel tank 8 by precursor overflow valve.
The scheme that this precursor overflow valve and proportional pressure control valve coordinate, is applicable to the cog belt fatigue behaviour experimental provision that load needed for cog belt 9 is comparatively large, hydraulic fluid flow rate is larger.
More preferably, this cog belt fatigue experimental device also comprises pressure detector 5 and controller (not shown), and pressure detector 5 can be arranged between hydraulic fluid port 31 and surplus valve 4 for detecting the pressure of pressure medium in rodless cavity.Pressure detector 5 is electrically connected with controller, controller is connected with surplus valve 4, for the oil pressure relief of pressure signal control ratio surplus valve fed back according to pressure detector 5, and then realize controlling the oil extraction pressure of load piston cylinder 3 and revising, cog belt 9 is rotated under suitable load.Pressure detector 5 is preferably pressure transducer, can be arranged between hydraulic fluid port 31 with surplus valve 4 and be connected on oil circuit, effectively can detect the pressure of hydraulic oil in rodless cavity; Controller can be chosen as the intelligent control device such as counter or single-chip microcomputer.
More preferably, this cog belt fatigue experimental device also comprises heating radiator 81, and heating radiator 81 can be arranged on the connecting line between fuel tank 8 and surplus valve 4.When the pressure medium in rodless cavity flows back to fuel tank 8 by surplus valve 4, this pressure medium temperature may raise because being extruded, arrange the pressure medium that heating radiator 81 can be effectively higher to temperature to lower the temperature, make the pressure medium getting back to fuel tank 8 have lower temperature.
More preferably, this cog belt fatigue experimental device also comprises return filter 82, and return filter 82 can be arranged on fuel tank 8 for oil-feed and fuel-displaced oil circuit, flows to the oil of rodless cavity for filtering oil-feed branch road, with the pressure medium flowing to fuel tank 8, to prevent element in impurity Wear System.
As shown in Figure 3, by arranging the flow direction of two position four-way solenoid valve 61 controlled pressure media, the test process of cog belt fatigue experimental device can be realized.
Two position four-way solenoid valves 61 are arranged on oil-feed branch road, and control its break-make, and two position four-way solenoid valves 61 have P mouth, T mouth, A mouth and B mouth, and P mouth is connected with fuel tank 8, and T mouth is connected with fuel tank 8, and A mouth is connected with hydraulic fluid port 31, and B mouth is connected with the oil-out of surplus valve 4.Two position four-way solenoid valves 61 have left side station and right side station, and when being in left side station, P mouth is communicated with A mouth, and T mouth and B mouth all end, and oil-feed branch road is communicated with; When being in right side station, P mouth and A mouth all end, and T mouth is communicated with B mouth, and oil-feed branch road blocks.
When driven wheel 2 turns clockwise, cog belt 9 and rotation testing table 1 O point around the shaft rotate.
Now, the piston rod being in the load piston cylinder 3 in left side in Fig. 3 rises, two position four-way solenoid valves 61 being in left side in Fig. 3 are in left side station, oil-feed branch road is opened, pressure medium, flows in cylinder barrel through the P mouth and A mouth being in two position four-way solenoid valves 61 in left side from fuel tank 8 by return filter 82.
Be in the piston rod pressurized of the load piston cylinder 3 on right side in Fig. 3, two position four-way solenoid valves 61 being in right side in Fig. 3 are in right side station in Fig. 3, oil return branch road is opened, pressure medium enters heating radiator 81 and return filter 82 by the B mouth and T mouth being in two position four-way solenoid valves 61 on right side, finally overflows back fuel tank 8.
Otherwise when driven wheel 2 is rotated counterclockwise, cog belt 9 and rotation testing table 1 O point around the shaft rotate.
Now, be in the piston rod pressurized of the load piston cylinder 3 in left side in Fig. 3, two position four-way solenoid valves 61 being in left side in Fig. 3 are in right side station, and oil return branch road is opened, and pressure medium is overflowed back in fuel tank 8 by heating radiator 81 and return filter 82.
The piston rod being in the load piston cylinder 3 on right side in Fig. 3 rises, and two position four-way solenoid valves 61 being in right side in Fig. 3 are in left side station in Fig. 3, and oil-feed branch road is opened, and pressure medium is flowed in cylinder barrel from fuel tank 8 by return filter 82.
Embodiments of the invention cog belt fatigue experimental device has following effect:
Control to load cog belt by surplus valve and load piston cylinder, the actual loading of cog belt can be simulated, and handled easily, control are accurate;
Because the hydraulic system structure loaded cog belt is compact, test easy accessibility, and also loading force can adjust as required at any time, therefore testing fatigue can be carried out to cog belt efficiently and accurately;
This cog belt fatigue experimental device has compact conformation, advantage easy to use, effectively can test out the fatigue behaviour of cog belt simultaneously.
Above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (11)
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| CN201510921178.4A CN105403406B (en) | 2015-12-11 | 2015-12-11 | Toothed belt fatigue test device |
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| CN201510921178.4A CN105403406B (en) | 2015-12-11 | 2015-12-11 | Toothed belt fatigue test device |
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| CN105403406A true CN105403406A (en) | 2016-03-16 |
| CN105403406B CN105403406B (en) | 2018-01-05 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106969912A (en) * | 2017-05-04 | 2017-07-21 | 北京金风科创风电设备有限公司 | Fatigue test tool, fatigue test machine and fatigue test method for transmission belt |
| CN107063652A (en) * | 2016-12-26 | 2017-08-18 | 安徽杰曼汽车零部件有限公司 | A kind of unidirectional valve opening pressure quick detection testing stand |
| CN108709741A (en) * | 2018-08-23 | 2018-10-26 | 无锡市宝业机械制造有限公司 | Toothed belt special fatigue test machine |
| CN115077897A (en) * | 2022-06-22 | 2022-09-20 | 燕山大学 | Toothed belt dynamic fatigue test device for salt spray environment |
| CN115879245A (en) * | 2023-02-21 | 2023-03-31 | 南通市中吕齿轮有限公司 | A Method for Evaluating the Fatigue Reliability of Medium Carbon Steel Gear Long-Life Transmission |
| CN116115055A (en) * | 2022-12-03 | 2023-05-16 | 乐屋(广东)高新科技有限公司 | Linkage curtain guide rail and electric curtain |
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