CN107725534B - A kind of load hydraulic loaded experimental system that axial load is adjustable - Google Patents
A kind of load hydraulic loaded experimental system that axial load is adjustable Download PDFInfo
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- CN107725534B CN107725534B CN201711089688.5A CN201711089688A CN107725534B CN 107725534 B CN107725534 B CN 107725534B CN 201711089688 A CN201711089688 A CN 201711089688A CN 107725534 B CN107725534 B CN 107725534B
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- spring
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- adjustable
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- 229920001971 elastomer Polymers 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 238000011068 loading method Methods 0.000 claims abstract description 4
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 18
- 238000005086 pumping Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 241000196324 Embryophyta Species 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 5
- 239000000806 elastomer Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 235000014676 Phragmites communis Nutrition 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 3
- 239000004519 grease Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
Abstract
The present invention provides a kind of load hydraulic loaded experimental systems that axial load is adjustable, including loading weighted platform, the load weighted platform is sequentially connected conversion valve block and double acting cylinder, the connection of double acting cylinder spring assembly end is slidably arranged in the sliding block on load weighted platform, and slips end connects pressure sensor.After protruding into conversion valve block port, fixing card is stuck in the bezel of the interface of valve body rubber hose of the invention.When needing to extract rubber hose, convenient disassembly can be detached from from the interface of valve body for rubber hose by pulling straight out.Rubber hose spoilage is high in laboratory operation, this structure convenient disassembly, easy to operate and safe and reliable.
Description
Technical field
The present invention relates to axially loaded experimental technique field, especially a kind of load hydraulic loaded that axial load is adjustable
Experimental system.
Background technique
In modern scientific research and production, the test of axial force simulation loading, is a very important link in experimental technique,
The quality of power load index directly influences the research to properties of product sometimes, or even whether determines product development success.In axis
It into power load test, needs to apply different power to executive component oil cylinder, is used to the various true working conditions of fictitious load.
Therefore, it is very necessary to develop a kind of load hydraulic loaded experimental system that axial load is adjustable.
Summary of the invention
Goal of the invention: the technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide a kind of axial load
The adjustable load hydraulic loaded experimental system of lotus.
In order to solve the above-mentioned technical problems, the present invention provides a kind of experiments of load hydraulic loaded that axial load is adjustable
System, including load weighted platform, the load weighted platform side are arranged double acting cylinder, double acting cylinder be connected to conversion valve block with
Pumping plant, the double acting cylinder connecting spring assembly, the connection of spring assembly end are slidably arranged on load weighted platform
Sliding block, slips end connect pressure sensor.
In the present invention, the load weighted platform is equipped with more than two cylinder stents, and the cylinder stent is equipped with
Two slide bars are equipped with sliding block between two slide bars, and pedestal cylinder is equipped in the cylinder stent, is equipped with bullet in the pedestal cylinder
Property part, elastic component includes two brackets that can stretch out cylinder stent bottom side of the wall, on the pedestal cylinder side wall at bracket end
Equipped with through-hole, cylinder stent lower end outer wall is equipped with location nut, and location nut outer ring is equipped with circlip, and circlip is in first position
When, bracket stretches out cylinder stent lower end outer wall and is connected on circlip, and at the second position, circlip and bracket support circlip in through-hole
It connects.
In the present invention, the spring assembly includes shell, and described shell one end is equipped with inner spring sleeve and outer spring set
Cylinder, the shell other end are equipped with ladder locating shaft, are equipped with inner spring and outer spring in shell, inner spring is located inside outer spring, rank
Terraced locating shaft is equipped with outer spring abutment sleeve, and inner spring one end is connected in inner spring sleeve, and it is fixed that the other end is connected to ladder
On the axis of position；Outer spring one end is connected in outer spring sleeve, and the other end is connected in outer spring abutment sleeve, and ladder positions shaft end
Portion is equipped with more than one protrusion, and side wall of the shell close to ladder locating shaft one end is equipped with the sliding slot being adapted to protrusion, ladder
When locating shaft squeezes inner spring and outer spring, protrusion is slided in sliding slot.
In the present invention, the length of the inner spring sleeve and outer spring sleeve is the length of a spring pitch.
In the present invention, the ladder locating shaft is hollow structure.
In the present invention, the conversion valve block includes more than two ports, is equipped with port recess at the port, port is recessed
Slot is successively arranged two circle inner groovies inside, is equipped with sealing ring in inner groovy.
In the present invention, the rubber hose being externally connected to is equipped at the port of the conversion valve block, each rubber hose
Port be respectively provided with a raised hose collar, the rubber hose at hose collar rear portion is equipped with flexible fixing card,
For fixing and sealing, the fixing card includes the tilting side with port recess shape adaptation for hose collar and fixing card, is tilted
Side rear portion is equipped with bevel edge, and bevel edge is adapted to the port inclined plane shape of valve block.
In the present invention, the tilting side is fixedly attached in hose collar, and hose collar is connected to outside port recess, is tilted
Side outer ring abuts on port recess inner wall.
The utility model has the advantages that rubber hose of the invention, after protruding into conversion valve block port, fixing card is stuck in the interface of valve body
Bezel on.When needing to extract rubber hose, pulls straight out rubber hose can be detached from from the interface of valve body and tear open
It unloads conveniently.Rubber hose spoilage is high in laboratory operation, this structure convenient disassembly, easy to operate and safe and reliable.
The cylinder stent of guiding slide bar of the invention has welded Clip Reed and location nut, can make two circles of elastic component
Post support, it is capable of expansion and contraction and reliable, so as to so that between cylinder stent and pedestal cylinder it is convenient for disassembly and assembly.
Detailed description of the invention
The present invention is done with reference to the accompanying drawings and detailed description and is further illustrated, it is of the invention above-mentioned or
Otherwise advantage will become apparent.
Fig. 1 is system structure diagram of the invention.
Fig. 2 is load weighted platform schematic diagram of the invention.
Slide bar and cylinder stent scheme of installation Fig. 3 of the invention.
Fig. 4 is slide block structure schematic diagram of the invention.
Fig. 5 is pedestal cylinder of the invention, Y type elastomer structure schematic diagram.
Fig. 6 is the schematic diagram that pedestal cylinder of the invention installs cylinder stent.
Fig. 7 is the schematic diagram that pedestal cylinder of the invention dismantles cylinder stent.
Fig. 8 is the structural schematic diagram of variable spring assembly of the invention.
Fig. 9 is that the spring rate of variable spring assembly of the invention calculates figure.
Figure 10 is the port of conversion valve block of the invention and the structural schematic diagram of rubber hose.
Figure 11 is the port of conversion valve block of the invention and the structural schematic diagram of rubber hose.
Figure 12 is double acting cylinder schematic diagram.
Specific embodiment
It elaborates below in conjunction with attached drawing to the present invention.
A kind of adjustable load hydraulic loaded experimental system of axial load as shown in Figure 1, including pumping plant (containing fuel tank)
1, conversion valve block 2, the fixed two-way function cylinder 3 of shell, adjustable rigidity spring assembly 4, pressure sensor 5, load loads flat
Platform 6；
Wherein, there are four ports for conversion valve block 2, are port 31, port 32, port 33, port 34 respectively.Port 31 and pump
The rubber hose 35 stretched out of standing connects, and the rubber hose 36 stretched in port 32 and fuel tank connects.Port 33 and port 34 are divided
The rubber hose 37 and 38 that do not stretch out with two outlets of double acting cylinder connects.Pressure sensor 5 is placed on 4 He of spring assembly
Between sliding block 8, the left side of spring assembly 4 and the right side of pressure sensor 5 are in close contact, the left side of pressure sensor 5 and cunning
The right side of block 8 is in close contact, and in the case where spring assembly 4 is in the situation not stressed, is loaded experiment product 51 and is directly placed at cunning
The left side of block 8.
As shown in Fig. 2, the load weighted platform 6 includes a platform 7, four pedestal cylinders have been welded on platform 7
10, double acting cylinder 3 is mounted on platform by the bolt pair 39 (GB5782) on platform 7.
As shown in figure 3, the bottom surface 14 of the pedestal cylinder 10 is welded in the cylindrical hole 15 of platform 7, cylinder stent
11 are separately mounted in four pedestal cylinders 10.Slide bar 9 passes through the cylindrical type chamber of sliding block 8, is then fitted on cylinder stent 11,
And it is fixed (GB/T5276) with nut 50.Sliding block 8 is moved along slide bar 9.
As shown in figure 4, the cylindrical type of the sliding block 8 is intracavitary rectangular coil groove 12, it is full of lubricating grease in groove 12,
The outside of sliding block 8 machined the threaded hole 13 of inwardly injection lubricating grease.
As shown in figure 5, four pedestal cylinders 10 have been welded on the platform 7, two cylindrical bodies 17 of Y type elastomer 16
It is stretched out out of pedestal cylinder 10 two cylindrical holes 18 respectively.The outside of cylinder stent 11 is connected through a screw thread location nut
20.Location nut 20 has welded Clip Reed 22 (material 65Mn), and cylinder stent 11 oppresses two cylindrical bodies of Y type elastomer 16
17, so that two cylindrical bodies 17 is also stretched out two cylindrical holes 19 of cylinder stent 11.
As shown in fig. 6, two cylindrical bodies 17 of the Y type elastomer 16 stretch out two cylindrical holes of cylinder stent 11
19, two cylindrical bodies 17 are just in the groove 21 of location nut 20 at this time.Cylinder stent 11 has been reliably mounted at pedestal
On cylinder 10.
As shown in fig. 7, twisting location nut 20 makes Clip Reed 22 oppress two circles when the cylinder stent 11 needs to dismantle
Cylinder 17, cylinder stent 11 can be detached from from pedestal cylinder 10 at this time.
As shown in figure 8, the stiffness variable spring assembly 4, including minor diameter spring 23, major diameter spring 24, group
Fit shell 25, ladder locating shaft 26, assembly inner casing.The inside face for combining body case 25 welds 2 cylinder type abutment sleeves,
It is little spring internal diameter abutment sleeve 27, big spring internal diameter abutment sleeve 28 respectively, the height of two spring positioning sleeves is bullet
One pitch of spring is long.The lateral surface for combining body case 25 is provided with 4 long U-shaped sliding slot 29.Ladder locating shaft 26 is U-shaped along length
29 linear slide of sliding slot.Ladder locating shaft 26 has welded big spring outer diameter abutment sleeve 30.The hollow setting of ladder locating shaft 26 was both
Weight can be mitigated or position the internal diameter of big spring and little spring.
Wherein the Rigidity Calculation of the adjustable rigidity spring assembly 4 is as follows:
Big spring rigidity is denoted as K1, and little spring rigidity is denoted as K2.Telescopic spring amount X: big spring stroke is denoted as X1, small bullet
Spring stroke is denoted as X2.As shown in figure 9, big spring removes the original length (L1+L2) after dead circle, after little spring removes dead circle
Original length L2, axial load F.
Work as X1>0 and X1<L1, F=K1 × X1；
As (L1+L2) >=X1 >=L1, little spring is also compressed by this time, F=K1 × X1+K2 × X2.
Stiffness variable spring assembly of the invention, big little spring can be replaced according to demand, and ladder locating shaft is also
The internal diameter of big spring and little spring can be positioned.
As shown in Figure 10 and Figure 11, four ports (31,32,33,34) of the conversion valve block 2 are cylindrical bodies, circle
It machined two square grooves 41 at a distance of very short distance in cylindrical chamber, placed O-ring seal 40 in groove.Fuel tank rubber
The port of hose 36, the port of pumping plant rubber hose 35, double acting cylinder two rubber hose 37 and 38 port all by heat at
Manage out a raised hose collar 42.Long V-type of elasticity in vulcanizing treatment between the hose collar 42 and hose of protrusion
Fixing card 43.During in the interface cylinder cavity of rubber hose (35,36,37,38 are applicable in) insertion valve body, long V
The tilting side 44 of the fixing card 43 of type is first oppressed in the interface cylinder cavity for going deep into valve body, until extending into first groove
In 45.During protruding into, the fixing card 43 of long V-type is oppressed always, and the oblique V-type side 46 of fixing card 43 of this duration V-type is just
It is stuck in well in the bezel 47 of the interface of valve body.When needing to extract rubber hose (35,36,39,40), pull straight out i.e.
Rubber hose can be detached from from the interface of valve body.It tilts side 44 to be fixedly attached in hose collar 42, hose collar 42 abuts
Outside port recess 45, tilts 44 outer ring of side and abut on 45 inner wall of port recess.
The present invention also provides a kind of load loading methods that axial load is adjustable, comprising the following steps:
Step 1: open power supply, pumping plant 1 operate, pumping plant 1 stretch out rubber hose 35 in start it is fuel-displaced, into conversion valve block
2 port 31.
Step 2: manipulation conversion valve block 2, if oil is flowed out from the port of conversion valve block 2 33, oil enters the rubber of two-way function cylinder 3
The bar 48 of glue hose 37, two-way function cylinder 3 stretches out to the left, and the face 49 of pressuring spring assembly 4 is moved to the left (as shown in Figure 9) bullet
When the face 49 of spring assembly 4 is moved to the left, big spring 53, the beginning of little spring 54 in spring assembly 4 are compressed, with big bullet
The variation of spring 53,54 decrement of little spring, spring assembly 4 will receive different axial load F.Suffered by spring assembly 4
Axial load F be transmitted to by pressure sensor 5, sliding block 8 and need to be loaded be loaded on experiment product 51.Pressure sensor 5
For showing the numerical value of axial load F.Meanwhile the bar 48 of two-way function cylinder 3 is retracted to the right, rubber of the oil from two-way function cylinder 3
Hose 38 flows out, and by the port 34 of conversion valve block 2, then flows out from the port of conversion valve block 2 32, flows back to pumping plant 1.
Step 3: being applied axial force suffered by the test test specimen of axial load, can be looked into from pressure sensor
It sees.The work of pumping plant 1 can be stopped by reaching required numerical value.
The present invention provides a kind of load hydraulic loaded experimental systems that axial load is adjustable, implement the technical side
There are many method and approach of case, the above is only a preferred embodiment of the present invention, it is noted that for the art
For those of ordinary skill, various improvements and modifications may be made without departing from the principle of the present invention, these improvement
It also should be regarded as protection scope of the present invention with retouching.The available prior art of each component part being not known in the present embodiment is subject to
It realizes.
Claims (6)
1. a kind of load hydraulic loaded experimental system that axial load is adjustable, which is characterized in that including loading weighted platform
(6), the load weighted platform (6) side setting double acting cylinder (3), double acting cylinder (3) are connected to conversion valve block (2) and pumping plant
(1), double acting cylinder (3) the connecting spring assembly (4), the connection of spring assembly (4) end are slidably arranged in load load
Sliding block (8) on platform (6), sliding block (8) end connect pressure sensor (5)；
The load weighted platform (6) is equipped with more than two cylinder stents (11), and the cylinder stent (11) is equipped with two
A slide bar (9) is equipped with sliding block (8) between two slide bars (9), and sliding block (8) can slide on two slide bars, the cylinder stent
(11) pedestal cylinder (10) are equipped in, are equipped with elastic component (16) in the pedestal cylinder, elastic component, which includes two, can stretch out circle
The bracket (17) of tube stent bottom side of the wall, the pedestal cylinder side wall at bracket end are equipped with through-hole (19), cylinder stent lower end
Outer wall is equipped with location nut (20), and location nut outer ring is equipped with circlip (22), and for circlip at first position, bracket stretches out cylinder
Pedestal lower end outer wall is connected on circlip, and at the second position, circlip abuts in through-hole circlip with bracket.
2. a kind of adjustable load hydraulic loaded experimental system of axial load according to claim 1, which is characterized in that
The spring assembly (4) includes shell (25), and described shell (25) one end is equipped with inner spring sleeve (27) and outer spring sleeve
(28), the shell other end is equipped with ladder locating shaft (26), and inner spring (23) and outer spring (24), inner spring are equipped in shell (25)
(23) it is located at outer spring (24) inside, ladder locating shaft (26) is equipped with outer spring abutment sleeve (30), inner spring (23) one end
It is connected in inner spring sleeve (27), the other end is connected on ladder locating shaft (26)；Outer spring (24) one end is connected to outer bullet
Outside, the other end is connected in outer spring abutment sleeve (30) spring sleeve (28), and ladder locating shaft (26) end is equipped with more than one
Protrusion, side wall of the shell (25) close to ladder locating shaft (26) one end be equipped with the sliding slot (29) that is adapted to of protrusion, ladder is fixed
When position axis (26) squeezes inner spring (23) and outer spring (24), protrusion sliding in sliding slot (29).
3. a kind of adjustable load hydraulic loaded experimental system of axial load according to claim 2, which is characterized in that
The ladder locating shaft (26) is hollow structure.
4. a kind of adjustable load hydraulic loaded experimental system of axial load according to claim 1, which is characterized in that
The conversion valve block includes more than two ports, is equipped with port recess (45) at the port, port recess (45) inside according to
It is secondary to be equipped with two circle inner groovies (41), sealing ring is equipped in inner groovy (41).
5. a kind of adjustable load hydraulic loaded experimental system of axial load according to claim 4, which is characterized in that
Be equipped with the rubber hose being externally connected at the port of the conversion valve block, the port of each rubber hose be respectively provided with one it is convex
The rubber hose of the hose collar (42) risen, hose collar (42) rear portion is equipped with flexible fixing card (43), hose axis
For fixing and sealing, the fixing card includes the tilting side with port recess (45) shape adaptation for ring (42) and fixing card (43)
(44), it tilts side (44) rear portion and is equipped with bevel edge (46), port inclined-plane (47) shape adaptation of bevel edge (46) and valve block.
6. a kind of adjustable load hydraulic loaded experimental system of axial load according to claim 5, which is characterized in that
The tilting side (44) is fixedly attached on hose collar (42), and hose collar (42) is connected in port recess (45), tilts
Side (44) outer ring is connected on port recess (45) inner wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711089688.5A CN107725534B (en) | 2017-11-08 | 2017-11-08 | A kind of load hydraulic loaded experimental system that axial load is adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711089688.5A CN107725534B (en) | 2017-11-08 | 2017-11-08 | A kind of load hydraulic loaded experimental system that axial load is adjustable |
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| Publication Number | Publication Date |
|---|---|
| CN107725534A CN107725534A (en) | 2018-02-23 |
| CN107725534B true CN107725534B (en) | 2019-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711089688.5A Active CN107725534B (en) | 2017-11-08 | 2017-11-08 | A kind of load hydraulic loaded experimental system that axial load is adjustable |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09166514A (en) * | 1995-12-18 | 1997-06-24 | Toyota Motor Corp | Operation inspection device for opening/closing means |
| RU2282065C2 (en) * | 2004-01-26 | 2006-08-20 | Открытое акционерное общество "Ракетно-космическая корпорация "Энергия" им. С.П. Королева" | Method of determination of characteristics of dimensionless parameters of working fluid flow rate in throttling ports of spool valve-type hydraulic distributors |
| CN103201551A (en) * | 2010-10-15 | 2013-07-10 | 世伟洛克公司 | Push to connect conduit fitting with ferrule |
| CN106194902A (en) * | 2016-09-20 | 2016-12-07 | 北京机械设备研究所 | A kind of force loading device based on spring |
| CN107131178A (en) * | 2016-02-29 | 2017-09-05 | 宝山钢铁股份有限公司 | The servo-cylinder performance test methods and its test system of a kind of stiffness variable |
-
2017
- 2017-11-08 CN CN201711089688.5A patent/CN107725534B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09166514A (en) * | 1995-12-18 | 1997-06-24 | Toyota Motor Corp | Operation inspection device for opening/closing means |
| RU2282065C2 (en) * | 2004-01-26 | 2006-08-20 | Открытое акционерное общество "Ракетно-космическая корпорация "Энергия" им. С.П. Королева" | Method of determination of characteristics of dimensionless parameters of working fluid flow rate in throttling ports of spool valve-type hydraulic distributors |
| CN103201551A (en) * | 2010-10-15 | 2013-07-10 | 世伟洛克公司 | Push to connect conduit fitting with ferrule |
| CN107131178A (en) * | 2016-02-29 | 2017-09-05 | 宝山钢铁股份有限公司 | The servo-cylinder performance test methods and its test system of a kind of stiffness variable |
| CN106194902A (en) * | 2016-09-20 | 2016-12-07 | 北京机械设备研究所 | A kind of force loading device based on spring |
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| CN107725534A (en) | 2018-02-23 |
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Application publication date: 20180223 Assignee: Jiangsu Nangong Testing Co.,Ltd. Assignor: NANJING INSTITUTE OF TECHNOLOGY Contract record no.: X2024980001810 Denomination of invention: A load hydraulic loading experimental system with adjustable axial load Granted publication date: 20190604 License type: Common License Record date: 20240202 Application publication date: 20180223 Assignee: Nanjing Duozi Control Technology Co.,Ltd. Assignor: NANJING INSTITUTE OF TECHNOLOGY Contract record no.: X2024980001809 Denomination of invention: A load hydraulic loading experimental system with adjustable axial load Granted publication date: 20190604 License type: Common License Record date: 20240202 |
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Application publication date: 20180223 Assignee: Nanjing Jinxi Yunchuang Technology Co.,Ltd. Assignor: NANJING INSTITUTE OF TECHNOLOGY Contract record no.: X2024980001815 Denomination of invention: A load hydraulic loading experimental system with adjustable axial load Granted publication date: 20190604 License type: Common License Record date: 20240204 Application publication date: 20180223 Assignee: Nanjing Dingbo controller Co.,Ltd. Assignor: NANJING INSTITUTE OF TECHNOLOGY Contract record no.: X2024980001812 Denomination of invention: A load hydraulic loading experimental system with adjustable axial load Granted publication date: 20190604 License type: Common License Record date: 20240204 |
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Application publication date: 20180223 Assignee: Nanjing Boliang Technology Co.,Ltd. Assignor: NANJING INSTITUTE OF TECHNOLOGY Contract record no.: X2024980002988 Denomination of invention: A load hydraulic loading experimental system with adjustable axial load Granted publication date: 20190604 License type: Common License Record date: 20240319 |
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