CN103883510B - A kind of thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing - Google Patents
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- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000003921 oil Substances 0.000 claims description 22
- 230000003139 buffering effect Effects 0.000 claims description 19
- 230000007246 mechanism Effects 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000010720 hydraulic oil Substances 0.000 claims description 2
- 239000003350 kerosene Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000002474 experimental method Methods 0.000 description 8
- 239000012530 fluid Substances 0.000 description 8
- 238000012937 correction Methods 0.000 description 7
- 238000013016 damping Methods 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012938 design process Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004836 empirical method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Abstract
A kind of thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing, it relates to a kind of flow pressure characteristic test experimental device, calculate the inaccurate problem of thrust plate pressure buffer concentrated flow piezometric force characteristic in plunger pump to solve existing employing empirical value method, it comprises oil hydraulic pump, the first relief valve, the second relief valve, the first pressure transducer, the first temperature transducer, the second pressure transducer, the second temperature transducer, throttling arrangement, flow transducer, throttle valve, solenoid directional control valve, lower margin and liquid tank; With the pipeline of channel connection is provided with the first pressure transducer and the first temperature transducer, be communicated with the first temperature transducer by solenoid directional control valve after the first relief valve is arranged in parallel with oil hydraulic pump; With the pipeline of flow passage is provided with the second pressure transducer, the second temperature transducer, the second relief valve and throttle valve be arranged in parallel after be communicated with flow transducer.The present invention is the characteristic test of dashpot flow pressure on Properties of Port Plate in Axial Piston Pump.
Description
Technical field
The present invention relates to a kind of flow pressure characteristic test experimental device, belong to hydraulic basis element and manufacture field.
Background technique
Hydraulic system is widely used in industrial field, and it is the automation of equipment in fields such as engineering machinery, equipment manufacturing, Aero-Space, huge contribution has been made in the raising of intellectuality and performance.And oil hydraulic pump plays an important role as the energy source of this hydraulic system.Pressure in Axial Piston Pump is high, and volumetric efficiency is high, easily realizes Flow-rate adjustment, and due to its sealing effect relatively better, be applicable to, in the hydraulic system of high-power, be widely used in engineering practice.
Traditional plunger pump design all adopts empirical method, approximate formula etc., and based on static parameter.And the later stage carrys out well designed result by many experiments, amendment.Such design process cost is high, the research and development of products cycle long, inefficiency.Along with the develop rapidly of computer technology, the means such as numerical calculation, emulation are that the optimal design of axial piston pump provides technical support.Can be obtained the dynamic parameters of axial piston pump inner fluid by simulation means, wherein, plunger cavity internal pressure is the key parameter in plunger pump, and it directly determines the dynamic stress of plunger and cylinder body and the oil film formational situation of trunk piston set, Slipper coupling and Port Plate Pair.The existing computational methods to plunger cavity pressure utilize the throttling formula of Flow continuity condition and plunger accent more, and the physical parameter such as flow coefficient in throttling formula when running to thrust plate transition zone for plunger replaces mainly with empirical value greatly, on thrust plate, dashpot flow pressure special parameter cannot directly be measured, and causes thrust plate pressure buffer concentrated flow piezometric force characteristic in the plunger pump obtained inaccurate.
Summary of the invention
The present invention calculates the inaccurate problem of thrust plate pressure buffer concentrated flow piezometric force characteristic in plunger pump for solving existing employing empirical value method, and then provides a kind of thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing.
The present invention is the technological scheme taked that solves the problem: a kind of thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing of the present invention comprises oil hydraulic pump, the first relief valve, the second relief valve, the first pressure transducer, the first temperature transducer, the second pressure transducer, the second temperature transducer, throttling arrangement, flow transducer, throttle valve, solenoid directional control valve, lower margin and liquid tank;
Described throttling arrangement comprises regulating mechanism, screwing mechanism, moving block, buffering frid and sole piece, and sole piece is arranged on lower margin; Buffering frid is embedded on the upper surface of sole piece, and moving block is arranged on the upper surface of buffering frid, the upper surface of buffering frid is processed with dashpot, sole piece is processed with passage, and passage, through buffering frid, moving block is processed with runner; Passage is connected with runner by dashpot, and dashpot board clamping is sealed by screwing mechanism by moving block and sole piece, and the both sides of sole piece are separately installed with a regulating mechanism, and regulating mechanism can adjust runner and passage distance in the horizontal direction; With the pipeline of channel connection is provided with the first pressure transducer and the first temperature transducer, be communicated with the first temperature transducer by solenoid directional control valve after the first relief valve is arranged in parallel with oil hydraulic pump; With the pipeline of flow passage is provided with the second pressure transducer and the second temperature transducer, the second relief valve and throttle valve be arranged in parallel after be communicated with flow transducer, flow transducer is communicated with the second temperature transducer by solenoid directional control valve; Oil hydraulic pump, throttle valve, the first relief valve are all communicated with liquid tank with the second relief valve.
The invention has the beneficial effects as follows: for the dashpot with various structures form, it is the conventional throttling shape such as sharp edge throttle orifice or long damping hole not, its flow coefficient gets the error that empirical value will cause dashpot flow pressure to calculate, and finally causes the isoparametric error of calculations of plunger cavity internal pressure.In order to obtain the accurate flow Pressure characteristics of thrust plate dashpot, thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing proposed by the invention, for the Flow characteristics of dashpot provides experimental condition.Plunger cavity on apparatus of the present invention energy analog ligand flow table during transition zone and the fluid between thrust plate height hydraulic fluid mouth flow, and the flow pressure characteristic curve of dashpot is obtained by the pressure adjusting dashpot both sides, obtain comparatively accurate flow coefficient, thus flow formula is revised.The flow pressure characteristic of damping trough can be reacted truly by this device, we can a coefficient by experiment inside data inverse flow pressure formula, generally, this coefficient is all empirical value, but the result in fact calculated differs larger with actual conditions, by flow pressure characteristic curve, we can abandon the flow coefficient of experience, obtain comparatively accurate flow coefficient, thus obtain the flow formula of correction, reduce design error, design error reduces 5%-15%.
In addition, utilize experimental setup of the present invention, by the pressure-loaded to its both sides mouth, measure the flow by dashpot, the Flow characteristic experiment of the multiple dashpots such as triangular groove, U-type groove, half slot, damping hole can be realized by exchange buffering frid, Flow characteristics test pressure is communicated with length stepless loading with fluid can be realized, and different fluid, multi-operating mode, many structures and hypermedia flow pressure characteristic test can be completed, there is versatility widely.
The present invention also has compact structure, and experiment parameter obtains easily, and the advantages such as low cost of manufacture, manufacture cost reduces 25%-35%.The present invention ensures, for the optimal design of the valve plate of plunger pump of the multiple operating temperature of medium lays the foundation for the flow pressure parameter accurate Calculation in plunger pump design process provides to test.
Accompanying drawing explanation
Fig. 1 is the annexation schematic diagram of experimental setup of the present invention, Fig. 2 is the main TV structure schematic diagram of throttling arrangement of the present invention, Fig. 3 is the side view of Fig. 2, Fig. 4 is the dashpot plate structure schematic diagram of triangle buffer groove, Fig. 5 is the dashpot plate structure schematic diagram of U-shaped dashpot, Fig. 6 is the dashpot plate structure schematic diagram of semicircle dashpot, Fig. 7 is the dashpot plate structure schematic diagram with damping hole, Fig. 8 is that triangular groove is communicated with the flow pressure performance diagram of length S when being 1mm to 10mm under different differential pressure action, Fig. 9 is that triangular groove is communicated with the flow coefficient correction value of length S when being 1mm to 10mm and empirical value comparison diagram, Figure 10 is pre-distressed zone inner plunger chamber dynamic pressure variation diagram, Figure 11 is the A place enlarged view of Figure 10, Figure 12 is the B place enlarged view of Figure 10, Figure 13 is inner plunger chamber, pre-loading district dynamic pressure variation diagram, Figure 14 is the C place enlarged view of Figure 13, Figure 15 is the D place enlarged view of Figure 13.
Embodiment
Embodiment one: composition graphs 1-Fig. 7 illustrates, a kind of thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing of present embodiment comprises oil hydraulic pump 11, first relief valve 12-1, the second relief valve 12-2, the first pressure transducer 13-1, the first temperature transducer 14-1, the second pressure transducer 13-2, the second temperature transducer 14-2, throttling arrangement 15, flow transducer 16, throttle valve 17, solenoid directional control valve 19, lower margin 1 and liquid tank 18;
Described throttling arrangement 15 comprises regulating mechanism 2, screwing mechanism 5, moving block 6, buffering frid 9 and sole piece 10, and sole piece 10 is arranged on lower margin 1; Buffering frid 9 is embedded on the upper surface of sole piece 10, moving block 6 is arranged on the upper surface of buffering frid 9, the upper surface of buffering frid 9 is processed with dashpot 9-1, sole piece 10 is processed with path 10-1, path 10-1, through buffering frid 9, moving block 6 is processed with runner 6-1; Path 10-1 is connected with runner 6-1 by dashpot, moving block 6 will cushion frid 9 pinch seal with sole piece 10 by screwing mechanism 5, the both sides of sole piece 10 are separately installed with a regulating mechanism 2, and regulating mechanism 2 can adjust runner 6-1 and path 10-1 distance in the horizontal direction; The pipeline be communicated with path 10-1 is provided with the first pressure transducer 13-1 and the first temperature transducer 14-1, is communicated with the first temperature transducer 14-1 by solenoid directional control valve 19 after the first relief valve 12-1 is arranged in parallel with oil hydraulic pump 11; The pipeline be communicated with runner 6-1 is provided with the second pressure transducer 13-2 and the second temperature transducer 14-2, be communicated with flow transducer 16 after second relief valve 12-2 and throttle valve 17 are arranged in parallel, flow transducer 16 is communicated with the second temperature transducer 14-2 by solenoid directional control valve 19; Oil hydraulic pump 11, throttle valve 17, first relief valve 12-1 are all communicated with liquid tank 18 with the second relief valve 12-2.
When present embodiment uses, oil hydraulic pump 11 provides hydraulic energy to whole system, the pressure of dashpot side is adjusted by the first relief valve 12-1 before throttling arrangement 15, and utilize the first pressure transducer 13-1 and the first temperature transducer 14-1 to measure force value and the temperature value of dashpot side, the throttle valve 17 of connecting variable after dashpot, adjust the pressure of dashpot opposite side with the second relief valve 12-2, utilize the second pressure transducer 13-2 and the second temperature transducer 14-2 to measure force value and the temperature value of dashpot opposite side.
Screwing mechanism 5 ensure that moving block 6 eases up sloted punched plate 9, static seal between buffering frid 9 and sole piece 10, reduces the error of flow measurement while eliminating each clearance leakage.
Also fluid temperature control system can be set up, for the valve plate of plunger pump design of the multiple operating temperature of medium provides experiment to ensure in liquid tank of the present invention.
When present embodiment uses, the outlet port of oil hydraulic pump 11 installs the first pressure gauge 21-1 additional, for monitoring the pressure of oil hydraulic pump; The second pressure gauge 21-2 installed by the pipeline that flow transducer 16 is communicated with throttle valve 17, for monitoring pressure during throttle valve adjustment flow.The buffering frid of present embodiment is provided with liquid-through hole 9-2, and liquid-through hole 9-2 is communicated with path 10-1, and liquid-through hole 9-2 excircle place is processed with dashpot 9-1.
Embodiment two: composition graphs 4-Fig. 7 illustrates, dashpot described in present embodiment is triangular groove, U-type groove, half slot or damping hole.Setting like this, completes the flow pressure characteristic test of different dashpot by the dashpot of various structures form and dimensional parameters, for the flow pressure parameter accurate Calculation in plunger pump design process provides experiment to ensure.Described damping hole is blind hole, and the buffering frid of present embodiment is provided with liquid-through hole 9-2, and liquid-through hole 9-2 is communicated with path 10-1, and liquid-through hole 9-2 excircle place is processed with dashpot 9-1.Other is identical with embodiment one.
Embodiment three: composition graphs 1 illustrates, the liquid medium in liquid tank 18 described in present embodiment is hydraulic oil, kerosene or water.Setting like this, can provide experiment to ensure for the valve plate of plunger pump design of the multiple operating temperature of medium.Other is identical with embodiment one or two.
Embodiment four: composition graphs 1 illustrates, screwing mechanism 5 described in present embodiment comprises four screw rod 5-1, eight nut 5-2 and eight backing plate 5-3; Four screw rod 5-1 pass vertically through moving block 6 and sole piece 10, and the two ends of each screw rod 5-1 are separately installed with backing plate 5-3 and nut 5-2.Setting like this, structure is simple, reasonable in design, easy disassembly, ensure that moving block 6 eases up sloted punched plate 9, static seal between buffering frid 9 and sole piece 10, reduces the error of flow measurement while eliminating each clearance leakage.Other is identical with embodiment three.
Embodiment five: composition graphs 1 illustrates, each described adjust structure 2 of present embodiment comprises adjustment side plate 2-1 and screw 2-2; The both sides of sole piece 10 are separately installed with the adjustment side plate 2-1 vertically arranged, and on each adjustment side plate 2-1, horizontal rotary is screwed with a screw 2-2, and screw 2-2 leans on the side of moving block 6.Setting like this, achieves the adjustment that dashpot is communicated with length (distance in passage and runner substantially horizontal), can complete the flow pressure characteristic test under different operating mode.Other with embodiment one, two or four identical.
Embodiment six: composition graphs 1 illustrates, the solenoid directional control valve 19 of present embodiment is communicated with the first temperature transducer 14-1 with oil hydraulic pump 11 respectively, and solenoid directional control valve 19 is communicated with flow transducer 16 with the second temperature transducer 14-2 respectively.Setting like this, solenoid directional control valve 19 realizes path checker, and the flow direction entering dashpot by conversion completes the flow pressure characteristic test to dashpot pre-loading on thrust plate and pre-release two kinds of situations.Other is identical with embodiment five.
Embodiment seven: composition graphs 2 illustrates, experimental setup described in present embodiment also comprises pipe joint 7, and path 10-1 and runner 6-1 are connected to pipe joint 7.Setting like this, assembly and disassembly is easy to use.Other with embodiment one, two, four or six identical.
Embodiment eight: composition graphs 1 illustrates, described in present embodiment, experimental setup also comprises liquid-filter, the pipeline that oil hydraulic pump 11 is communicated with liquid tank 18 is provided with liquid-filter, the pipe that throttle valve 17 is communicated with liquid tank 18 on liquid-filter is installed.Setting like this, is convenient to consider at any time except the impurity in liquid tank in experimentation, ensures the trouble-free operation of experiment.Other is identical with embodiment seven.
Working procedure: composition graphs 1-Figure 15 illustrates, oil hydraulic pump 11 starts to rotate formation imbibition pressure under the drive of motor, and pressure liquid enters pipeline through oil hydraulic pump 11.When solenoid directional control valve 19 is not charged, left position access fluid path, pressure liquid enters throttling arrangement 15 through the left position of solenoid directional control valve 19, and the first pressure transducer 13-1 and the first temperature transducer 14-1 measures upstream pressure and temperature; Oil return is through solenoid directional control valve 19, and the second pressure transducer 13-2 and the second temperature transducer 14-2 measures downstream pressure and temperature.Flow through flow transducer 16, second relief valve 12-2, throttle valve 17 and oil purifier 20-2 oil sump tank.
When solenoid directional control valve 19 is charged, right position access fluid path.Pressure liquid enters on the right side of throttling arrangement 15, and the second pressure transducer 13-2 and the second temperature transducer 14-2 measures upstream pressure and temperature, and the first pressure transducer 13-1 and the first temperature transducer 14-1 measures downstream pressure and temperature.
In Fig. 9 of the present invention, dotted line represents the empirical value of flow coefficient, the solid line of band fork represents the correction value of flow coefficient, Figure 10 presses curve over time (solid line represents the correction value curve utilizing experimental setup of the present invention to obtain in pre-distressed zone inner plunger chamber, dotted line represents empirical value curve), Figure 11 is the A place enlarged view of Figure 10, and Figure 12 is that a large figure is put at the B place of Figure 10; Figure 13 presses curve over time (solid line represents the correction value curve utilizing experimental setup of the present invention to obtain in inner plunger chamber, pre-loading district, dotted line represents empirical value curve), Figure 14 is the C place enlarged view of Figure 13, Figure 15 is the D place enlarged view of Figure 13, as seen from the figure, under time identical in pre-distressed zone, in the plunger cavity utilizing experimental setup of the present invention to obtain, pressure correction value is lower than empirical value, reduces design error; Under time identical in pre-loading district, in the plunger cavity utilizing experimental setup of the present invention to obtain, pressure correction value is higher than empirical value, reduce design error, experimental setup of the present invention can lay the foundation for the optimal design of the valve plate of plunger pump of the multiple operating temperature of medium and provide safeguard.
Claims (7)
1. a thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing, is characterized in that: it comprises oil hydraulic pump (11), the first relief valve (12-1), the second relief valve (12-2), the first pressure transducer (13-1), the first temperature transducer (14-1), the second pressure transducer (13-2), the second temperature transducer (14-2), throttling arrangement (15), flow transducer (16), throttle valve (17), solenoid directional control valve (19), lower margin (1) and liquid tank (18);
Described throttling arrangement (15) comprises regulating mechanism (2), screwing mechanism (5), moving block (6), buffering frid (9) and sole piece (10), and sole piece (10) is arranged on lower margin (1); Buffering frid (9) is embedded on the upper surface of sole piece (10), moving block (6) is arranged on the upper surface of buffering frid (9), the upper surface of buffering frid (9) is processed with dashpot (9-1), sole piece (10) is processed with passage (10-1), moving block (6) is processed with runner (6-1); Passage (10-1) is connected with runner (6-1) by dashpot (9-1), moving block (6) and sole piece (10) will cushion frid (9) pinch seal by screwing mechanism (5), the both sides of sole piece (10) are separately installed with a regulating mechanism (2), and regulating mechanism (2) can adjust runner (6-1) and passage (10-1) distance in the horizontal direction; The pipeline be communicated with passage (10-1) is provided with the first pressure transducer (13-1) and the first temperature transducer (14-1), is communicated with the first temperature transducer (14-1) by solenoid directional control valve (19) after the first relief valve (12-1) is arranged in parallel with oil hydraulic pump (11); The pipeline be communicated with runner (6-1) is provided with the second pressure transducer (13-2) and the second temperature transducer (14-2), be communicated with flow transducer (16) after second relief valve (12-2) and throttle valve (17) are arranged in parallel, flow transducer (16) is communicated with the second temperature transducer (14-2) by solenoid directional control valve (19); Oil hydraulic pump (11), throttle valve (17), the first relief valve (12-1) are all communicated with liquid tank (18) with the second relief valve (12-2).
2. a kind of thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing according to claim 1, is characterized in that: described dashpot (9-1) is triangular groove, U-type groove or half slot.
3. a kind of thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing according to claim 1 and 2, is characterized in that: the liquid medium in described liquid tank (18) is hydraulic oil, kerosene or water.
4. a kind of thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing according to claim 3, is characterized in that: described screwing mechanism (5) comprises four screw rods (5-1), eight nuts (5-2) and eight backing plates (5-3); Four screw rods (5-1) pass vertically through moving block (6) and sole piece (10), and the two ends of each screw rod (5-1) are separately installed with backing plate (5-3) and nut (5-2).
5. a kind of thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing according to claim 1,2 or 4, is characterized in that: each described adjust structure (2) comprises adjustment side plate (2-1) and screw (2-2); The both sides of sole piece (10) are separately installed with adjustment side plate (2-1) vertically arranged, the upper horizontal rotary of each adjustment side plate (2-1) is screwed with a screw (2-2), and screw (2-2) leans on the side of moving block (6).
6. a kind of thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing according to claim 1,2 or 4, it is characterized in that: described experimental setup also comprises pipe joint (7), passage (10-1) and runner (6-1) are connected to pipe joint (7).
7. a kind of thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing according to claim 6, it is characterized in that: described experimental setup also comprises the first liquid-filter (20-1) and the second liquid-filter (20-2), the pipeline that oil hydraulic pump (11) is communicated with liquid tank (18) is provided with the first liquid-filter (20-1), the pipeline that throttle valve (17) is communicated with liquid tank (18) is provided with the second liquid-filter (20-2).
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| CN201410155579.9A CN103883510B (en) | 2014-04-17 | 2014-04-17 | A kind of thrust plate pressure buffer concentrated flow piezometric force characteristic experimental apparatus for testing |
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| CN110431508A (en) * | 2017-03-28 | 2019-11-08 | 株式会社富士金 | Pressure flow-rate controller and flow control methods |
| CN112113871B (en) * | 2020-09-18 | 2024-01-26 | 哈尔滨工业大学 | Surface microstructure fluid scouring resistance testing device |
| CN112762054B (en) * | 2021-01-14 | 2022-09-09 | 哈尔滨工业大学 | Comprehensive hydraulic valve performance test system |
| CN113065212A (en) * | 2021-04-09 | 2021-07-02 | 哈尔滨理工大学 | Motor combination pressure buffer tank structure design method based on bird swarm algorithm |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2050094U (en) * | 1989-04-25 | 1989-12-27 | 中国矿业大学北京研究生部 | End face port plate for axial plunger pump or motor |
| US6318167B1 (en) * | 1998-05-04 | 2001-11-20 | Parker-Hannifin Corp. | Volumetric test stand cylinder monitor/controller |
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Owner name: SHANDONG CHANGLIN MACHINERY CO., LTD. SHANDONG CCH Effective date: 20150430 |
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