CN213121109U - Foil dynamic pressure air thrust bearing test bed - Google Patents
Foil dynamic pressure air thrust bearing test bed Download PDFInfo
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- CN213121109U CN213121109U CN202021700844.4U CN202021700844U CN213121109U CN 213121109 U CN213121109 U CN 213121109U CN 202021700844 U CN202021700844 U CN 202021700844U CN 213121109 U CN213121109 U CN 213121109U
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Abstract
The utility model relates to a test bed for foil dynamic pressure air thrust bearing, which comprises a foil dynamic pressure thrust bearing and a workbench; the device also comprises a bearing system, a driving system, a loading system and a collecting system which are arranged on the workbench and used for carrying the foil dynamic pressure thrust bearing. The utility model aims at overcoming the defect that prior art exists, provide a foil dynamic pressure air footstep bearing test bench that satisfies take-off rotational speed, friction consumption, friction moment of torsion and bearing capacity test requirement and have static loading function.
Description
Technical Field
The utility model relates to a foil air bearing test field especially relates to a foil dynamic pressure air footstep bearing test bench.
Background
Foil air bearings are dynamic pressure bearings with air as the lubricating medium, also known as foil dynamic pressure air thrust bearings. The foil air bearing can meet the excellent characteristics of oil-free performance, low friction loss, long service life and high rotating speed of a fuel cell air compressor by itself, and is widely applied to the fields of an aircraft environment control system ACM, a small turbojet engine, a turbine refrigerator, a micro gas turbine, an air suspension centrifugal blower and the like. With the gradual commercialization of hydrogen energy vehicles, foil air bearings are also further popularized and applied to fuel cell air compressors.
After the design and sample preparation of the existing air bearing are finished, tests such as takeoff rotating speed, friction power consumption, friction torque, bearing capacity and the like need to be carried out on a simulation test bench, and then bearing design parameters are adjusted according to test results until design requirements are met. In patent CN207850688U, a high-pressure gas driven turbine driving mode is adopted, which cannot meet the actual high-speed loaded operation condition due to power limitation, and in addition, the test bench has no static force loading device. Therefore, the foil dynamic pressure air thrust bearing test bed which meets the test requirements and has a static loading function is designed and manufactured very urgently.
Disclosure of Invention
The utility model aims at overcoming the defect that prior art exists, provide a foil dynamic pressure air footstep bearing test bench that satisfies take-off rotational speed, friction consumption, friction moment of torsion and bearing capacity test requirement and have static loading function.
Realize the utility model discloses the technical scheme of purpose is: a foil dynamic pressure air thrust bearing test bed comprises a foil dynamic pressure thrust bearing and a workbench; the foil dynamic pressure thrust bearing is arranged on the workbench and used for carrying a foil dynamic pressure thrust bearing;
the driving system is arranged at one end of the bearing system and is used for driving the foil dynamic pressure thrust bearing carried on the bearing system to simulate the operation under all working conditions;
a loading system for providing multi-stage adjustable static load to the bearing system in a non-contact manner;
the acquisition system is used for acquiring parameter information of the foil dynamic pressure thrust bearing under the full-working-condition operation and uploading the parameter information to a computer for analysis and storage.
Further, the driving system comprises a high-voltage power supply, a controller and a high-speed motor; the input end of the controller is connected with the output of the high-voltage power supply; the output end of the controller is connected with the high-speed motor; the high-speed motor is fixed on the workbench through the motor mounting seat; the controller can communicate with the outside to send and receive data; and a thrust disc is fixed on an output shaft of the high-speed motor.
Further, a cooling system is arranged in the driving system; the cooling system comprises a water tank, a controller, a high-speed motor, a cooling loop and cooling liquid in the cooling loop; the cooling loop is a counterclockwise circulating cooling loop formed by sequentially connecting a water tank, a water pump, a controller and a high-speed motor; the four are connected through a pipeline.
Further, the cooling liquid is a mixture of water and ethylene glycol, and the volume ratio of the water to the ethylene glycol is 1: 1.
Further, the bearing system comprises a carrier device and a weighing device mounted on the carrier device; the carrier device comprises a radial support bearing, a floating shaft and a bearing seat; the floating shaft is placed in the radial support bearing; the floating shaft can axially move and circumferentially rotate in the radial support bearing; the tail end of the radial support bearing corresponding to the loading system is fixed with a permanent magnet; a floating shaft thrust disc is fixed at the tail end of the radial support bearing corresponding to the driving system; the foil dynamic pressure thrust bearing is arranged on the outer side of the floating shaft thrust disc.
Further, the radial support bearing is a static pressure air bearing provided with a high pressure air source connector.
Further, the weighing device is mounted on a floating shaft thrust disc; the weighing device comprises a weighing sensor, a force measuring rod and a heavy object; the weighing sensor and the force measuring rod and the heavy object are connected through steel wire ropes; the force measuring rod is in threaded connection with the floating shaft thrust disc; and a roller is additionally arranged between the force measuring rod and the heavy object.
Further, the loading system comprises a loading permanent magnet, a mounting seat and a static loading device; the loading permanent magnet is connected with the mounting seat through a loading weighing sensor; the mounting seat is driven by the static loading device to move forwards and backwards.
Furthermore, the permanent magnet and the loading permanent magnet are made of neodymium iron boron, and the magnetic poles of the loading permanent magnet are opposite to those of the permanent magnet.
Further, the static loading device is a hand-operated ball screw, and a locking device is arranged on the hand-operated ball screw.
After the technical scheme is adopted, the utility model discloses following positive effect has:
(1) the utility model discloses permanent magnet and loading permanent magnet magnetic pole opposite direction set up, transmit the loading power through this kind of non-contact mode, can prevent effectively that the loading system from to the friction torque measurement's in the bearing system influence.
(2) The utility model discloses a in the static loading device in the same direction as/anticlockwise wave the handle to this clearance size between adjustment permanent magnet and the loading permanent magnet adjusts the size that acts on foil dynamic pressure footstep bearing loading power, is equipped with locking device on the lead screw, and locking after the loading power reaches the setting value keeps the loading power unchangeable at the setting value. The gap between the permanent magnet and the loading permanent magnet is adjusted to realize stepless adjustment of the static load, so that the test is more complete, and the optimization of products in the later period is more facilitated.
(3) The utility model provides a cooling system has solved high-speed motor small power density big, the great problem of generating heat, and the cooling liquid can realize fine radiating effect in the circulative cooling of cooling circuit to solve the great problem that generates heat of high-speed motor.
(4) The utility model discloses data acquisition system is convenient for the analysis and stores the relevant data information in the test procedure for whole equipment is more digital, gained data is also more accurate, and the later stage of being convenient for carries out contrastive analysis when optimizing this product.
Drawings
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which
Fig. 1 is a schematic structural diagram of a driving system of the present invention;
FIG. 2 is a schematic view of the carrier device of the present invention;
FIG. 3 is a schematic structural view of the weighing apparatus of the present invention;
fig. 4 is a schematic structural diagram of the loading system of the present invention;
FIG. 5 is an overall perspective view of the present invention;
fig. 6 is a block diagram of the data acquisition system of the present invention.
The reference numbers in the drawings are as follows:
a workbench 0 and a main support 01;
the device comprises a driving system 1, a high-voltage power supply 11, a controller 12, a water pump 13, a water tank 14, a high-speed motor 15, a thrust disc 16 and a motor mounting seat 17;
the device comprises a bearing system 2, a foil dynamic pressure thrust bearing 2a1, a radial support bearing 2a2, a floating shaft 2a3, a permanent magnet 2a4, a bearing seat 2a5, a floating shaft thrust disc 2a6, a high-pressure air source joint 2a8, a weighing sensor 2b1, a steel wire rope 2b2, a force measuring rod 2b3, a roller 2b4, a weight 2b5, a magnetic gauge frame 2b6 and a photoelectric speed measuring sensor 2b 7;
the loading system 3, the loading permanent magnet 31, the loading weighing sensor 33, the mounting seat 34, the static loading device 35 and the bottom plate 36;
a data acquisition system 4.
Detailed Description
(example 1)
Referring to fig. 1 to 6, the present invention includes a foil hydrodynamic thrust bearing 2a1 and a table 0; the bearing system 2 is arranged on the workbench 0 and is used for carrying the foil dynamic pressure thrust bearing 2a 1;
the driving system 1 is arranged at one end of the bearing system 2 and is used for driving the foil dynamic pressure thrust bearing 2a1 carried on the bearing system 2 to simulate the operation under all working conditions;
a loading system 3 for providing stepless adjustable static load to the bearing system 2 in a non-contact way;
and the data acquisition system 4 is used for acquiring parameter information of the foil dynamic pressure thrust bearing 2a1 under the full-working-condition operation and uploading the parameter information to a computer for analysis and storage.
More specifically in the present embodiment, the drive system 1 includes a high-voltage power supply 11, a controller 12, and a high-speed motor 15; the input end of the controller 12 is connected with the output end of the high-voltage power supply 11, the output end of the controller 12 is connected with the high-speed motor 15, the high-speed motor 15 is fixed on the workbench 0 through the motor mounting seat 17, and the high-speed motor 15 and the motor mounting seat 18 as well as the motor mounting seat 17 and the workbench 0 are connected through bolts; the controller 12 can exchange data with external communications; wherein more specifically, the high voltage power supply 11 is used to provide direct current to the controller 12; the direct current is inverted into three-phase alternating current through the controller 12 and is supplied to the high-speed motor 15, specifically, the controller 12 communicates with the outside through a CAN (controller area network), and the outside CAN give a designated data signal to the controller 12, so that the rotating speed of the motor is controlled; a thrust disc 16 is fixed to an output shaft of the high-speed motor 15.
More specifically in this embodiment, the bearing system 2 comprises a carrier device and a weighing device mounted on the carrier device; the carrier device comprises a radial support bearing 2a2, a floating shaft 2a3 and a bearing seat 2a5 for fixing the radial support bearing 2a 2; the radial support bearing 2a2 is in interference connection with the bearing seat 2a5, the floating shaft 2a3 is placed in the radial support bearing 2a2, the radial support bearing 2a2 is a static pressure air bearing, high pressure air is introduced into the static pressure air bearing through the high pressure air source connector 2a8 to float the floating shaft 2a3, the floating shaft 2a3 can axially move and circumferentially rotate in the static pressure air bearing, and the permanent magnet 2a4 is fixed at the tail end of the radial support bearing 2a2 corresponding to the loading system 3; the end of the radial support bearing 2a2 corresponding to the drive system 1 is fixed with a floating shaft thrust disc 2a6, a foil dynamic pressure thrust bearing 2a1 is arranged outside the floating shaft thrust disc 2a6, and the foil dynamic pressure thrust bearing 2a1 and the floating shaft 2a3 are fixed by bolts.
More specifically in this embodiment, the weighing device is mounted on the floating shaft thrust disc 2a 6; the weighing device comprises a weighing sensor 2b1, a force measuring bar 2b3 and a weight 2b 5; the load cell 2b1 and the force measuring rod 2b3 and the force measuring rod 2b3 and the weight 2b5 are connected through a steel wire rope 2b 2; the force measuring rod 2b3 is in threaded connection with the floating shaft thrust disc 2a 6; a roller 2b4 is additionally arranged between the force measuring rod 2b3 and the weight 2b 5; the weighing sensor 2b1 and the roller 2b4 are erected on two sides of the floating shaft thrust disc 2a6 through the main bracket 01, the weighing sensor 2b1 and the roller 2b4 are fixed on the main bracket 01 through an auxiliary bracket matching bolt, and the main bracket 01 is fixed on the workbench 0 through a bolt. When the high-speed motor 15 rotates, an axial buoyancy and micron-sized gaps are formed between the foil dynamic pressure thrust bearing 2a1 and the thrust disc 16 due to the dynamic pressure effect, high-pressure gas is introduced into the static pressure air bearing, the floating shaft 2a3 floats, the thrust disc 16 rotates at a high speed, friction torque is formed between the thrust disc and the air, and the friction torque is calculated by measuring the tension of the weighing sensor 2b1 and multiplying the tension arm L.
More specifically in this embodiment, the loading system 3 is mounted on the table 0 by a bottom plate 36 fitted with bolts; the loading system 3 comprises a loading permanent magnet 31, a mounting seat 34 and a static loading device 35; the loading permanent magnet 31 is connected with the mounting seat 34 through a loading weighing sensor 33, and the loading weighing sensor 33 is locked on the mounting seat 34 through a bolt; the mounting block 34 is driven by a static loading device 35 to move forward and backward.
More specifically, in this embodiment, the permanent magnet 2a4 and the loading permanent magnet 31 are made of neodymium iron boron, and the magnetic poles of the opposite surfaces of the loading permanent magnet 31 and the permanent magnet 2a4 are opposite when the loading permanent magnet and the permanent magnet are installed, that is, the like poles of the magnets repel each other, and the opposite poles attract each other; the loading force of the loading system 3 is transmitted in a non-contact mode through the loading permanent magnet 31 and the permanent magnet 2a4, and the influence of the loading system on the friction torque measurement in the bearing system can be effectively prevented.
More specifically, in this embodiment, the acquisition system 4 includes a data acquisition card, and the acquisition system 4 acquires parameter information of the foil dynamic pressure thrust bearing 2a1 under the full operating condition through the data acquisition card and uploads the parameter information to the computer for analysis and storage, where the parameter information includes friction torque, rotational speed of the foil dynamic pressure thrust bearing 2a1, and axial displacement of the floating shaft 2a3, where the friction torque is monitored by a weighing sensor, the rotational speed is monitored by a photoelectric speed measurement sensor 2b7, the photoelectric speed measurement sensor 2b7 may be mounted on the magnetic meter frame 2b6 by a mounting seat and a bolt, and the magnetic meter frame 2b6 is adsorbed on the workbench 0.
(example 2)
In the present embodiment, on the basis of embodiment 1, a cooling system is further provided in the driving system 1; the cooling system comprises a water tank 14, a water pump 13, a controller 12, a high-speed motor 15, a cooling loop and cooling liquid in the cooling loop; the cooling loop is a counterclockwise circulating cooling loop formed by sequentially connecting a water tank 14, a water pump 13, a controller 12 and a high-speed motor 15; the four are connected through a pipeline.
More specifically, in this embodiment, the cooling liquid is a mixture of water and ethylene glycol, and the volume ratio of the water to the ethylene glycol mixture is 1: 1. The high-speed motor has small volume, large power density and large heat generation, heat is dissipated through liquid cooling, cooling liquid in the water tank 14 preferentially enters the controller 12 through the water pump 13, then enters the high-speed motor 15 and finally flows back to the water tank 14, cooling cavities are arranged in the controller 12 and the high-speed motor 15, and the cooling liquid enters the cooling cavities to cool the cooling liquid. The cooling chamber can be a liquid cooling structure in the existing motor, and the cooling structure of the controller 12 can be the same as the liquid cooling structure of the motor.
(example 3)
In this embodiment, on the basis of embodiment 1, the static loading device 35 is a hand-operated ball screw, and a locking device is arranged on the hand-operated ball screw; hand ball includes the lead screw, install at the terminal handle of lead screw and be used for setting up the fixed bolster of lead screw, be the bearing connection between lead screw and the fixed bolster, in the same direction as/anticlockwise wave the handle, can adjust the clearance size between loading permanent magnet 31 and the permanent magnet 2a4, can control the size of loading power, be equipped with locking device on the lead screw, locking after the loading power reaches the setting value, keep the loading power unchangeable at the setting value, this locking device chooses for use current lead screw regulation locking device can, it is here not adding the perplexing for a long time. The technical scheme can be used for measuring the rotating speed range of the foil dynamic pressure thrust bearing 2a1 to be 0-10 ten thousand rpm, the static load range to be 0-200N and the friction torque measuring range to be 0-150N.mm
The utility model discloses a theory of operation does: firstly, the cooling water pump 13 is started, the high-pressure gas source connector 2a8 is filled with high-pressure gas, the high-speed motor 15 is started, the initial load of the loading system 3 is zero, then the rotating speed of the high-speed motor 15 is gradually increased to a set rotating speed, and then the loading system 3 is gradually adjusted to the set load. The floating shaft 2a3 is suspended in the axial direction due to dynamic pressure effect, and is also suspended in the radial direction due to high-pressure gas in the static pressure air bearing; the thrust disk 16 rotates at a high speed and forms a friction torque with air, which is calculated by measuring the tension of the load cell 2b1 multiplied by the moment arm L.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A foil hydrodynamic air thrust bearing test bed comprises a foil hydrodynamic thrust bearing (2a1) and a workbench (0); the method is characterized in that: the device also comprises a bearing system (2) which is arranged on the workbench (0) and is used for carrying the foil dynamic pressure thrust bearing (2a 1);
the driving system (1) is arranged at one end of the bearing system (2) and is used for driving a foil dynamic pressure thrust bearing (2a1) carried on the bearing system (2) to simulate the operation of all working conditions;
a loading system (3) for providing a stepless adjustable static load to the bearing system (2) in a non-contact manner;
the acquisition system (4) is used for acquiring parameter information of the foil dynamic pressure thrust bearing (2a1) under the full-working-condition operation and uploading the parameter information to a computer for analysis and storage.
2. The foil dynamical pressure air thrust bearing test stand of claim 1, wherein: the driving system (1) comprises a high-voltage power supply (11), a controller (12) and a high-speed motor (15); the input end of the controller (12) is connected with the output of the high-voltage power supply (11); the output end of the controller (12) is connected with a high-speed motor (15); the high-speed motor (15) is fixed on the workbench (0) through a motor mounting seat (17); the controller (12) can communicate with the outside to send and receive data; and a thrust disc (16) is fixed on an output shaft of the high-speed motor (15).
3. The foil dynamical pressure air thrust bearing test stand of claim 2, wherein: a cooling system is also arranged in the driving system (1); the cooling system comprises a water tank (14), a water pump (13), a controller (12), a high-speed motor (15), a cooling loop and cooling liquid in the cooling loop; the cooling loop is a counterclockwise circulating cooling loop formed by sequentially connecting a water tank (14), a water pump (13), a controller (12) and a high-speed motor (15); the four are connected through a pipeline.
4. The foil dynamical pressure air thrust bearing test stand of claim 3, wherein: the cooling liquid is a mixture of water and glycol, and the volume ratio of the water to the glycol mixture is 1: 1.
5. The foil dynamical pressure air thrust bearing test stand of claim 1, 2 or 3, wherein: the bearing system (2) comprises a carrier device and a weighing device arranged on the carrier device; the carrier device comprises a radial support bearing (2a2), a floating shaft (2a3) and a bearing seat (2a 5); the floating shaft (2a3) is placed in a radial support bearing (2a 2); the floating shaft (2a3) can axially move and circumferentially rotate in a radial support bearing (2a 2); the tail end of the radial support bearing (2a2) corresponding to the loading system (3) is fixed with a permanent magnet (2a 4); a floating shaft thrust disc (2a6) is fixed at the tail end of the radial support bearing (2a2) corresponding to the driving system (1); the foil dynamic pressure thrust bearing (2a1) is arranged outside the floating shaft thrust disc (2a 6).
6. The foil dynamical pressure air thrust bearing test stand of claim 5, wherein: the radial support bearing (2a2) is a static pressure air bearing provided with a high pressure air source connector (2a 8).
7. The foil dynamical pressure air thrust bearing test stand of claim 5, wherein: the weighing device is mounted on a floating shaft thrust disc (2a 6); the weighing device comprises a weighing sensor (2b1), a force measuring bar (2b3) and a weight (2b 5); the weighing sensor (2b1) and the force measuring rod (2b3) as well as the force measuring rod (2b3) and the weight (2b5) are connected through a steel wire rope (2b 2); the force measuring rod (2b3) is in threaded connection with the floating shaft thrust disc (2a 6); and a roller (2b4) is additionally arranged between the force measuring rod (2b3) and the weight (2b 5).
8. The foil dynamical pressure air thrust bearing test stand of claim 1, 2 or 3, wherein: the loading system (3) comprises a loading permanent magnet (31), a mounting seat (34) and a static loading device (35); the loading permanent magnet (31) is connected with the mounting seat (34) through a loading weighing sensor (33); the mounting seat (34) is driven by a static loading device (35) to move back and forth.
9. The foil dynamical pressure air thrust bearing test stand of claim 8, wherein: the loading permanent magnet (31) and the permanent magnet (2a4) are made of neodymium iron boron, and the magnetic poles of the loading permanent magnet (31) and the permanent magnet (2a4) are opposite.
10. The foil dynamical pressure air thrust bearing test stand of claim 8, wherein: the static loading device (35) is a hand-operated ball screw, and a locking device is arranged on the hand-operated ball screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021700844.4U CN213121109U (en) | 2020-08-15 | 2020-08-15 | Foil dynamic pressure air thrust bearing test bed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021700844.4U CN213121109U (en) | 2020-08-15 | 2020-08-15 | Foil dynamic pressure air thrust bearing test bed |
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| CN213121109U true CN213121109U (en) | 2021-05-04 |
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| CN202021700844.4U Active CN213121109U (en) | 2020-08-15 | 2020-08-15 | Foil dynamic pressure air thrust bearing test bed |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916670A (en) * | 2021-10-09 | 2022-01-11 | 东莞青锐科技有限公司 | Axial loading test apparatus and method |
| CN114112393A (en) * | 2021-11-25 | 2022-03-01 | 重庆江增船舶重工有限公司 | Control system of full-floating thrust bearing test bed |
| CN114593852A (en) * | 2022-03-07 | 2022-06-07 | 北京理工大学 | Bearing capacity calibration method for dynamic pressure thrust gas bearing |
| CN114608744A (en) * | 2022-03-07 | 2022-06-10 | 北京理工大学 | Bearing capacity calibration system for dynamic pressure thrust gas bearing |
| CN114878163A (en) * | 2022-05-18 | 2022-08-09 | 哈尔滨工业大学 | High-precision dynamic pressure thrust foil bearing dynamic and static synchronous loading testing device |
| CN115962141A (en) * | 2022-12-12 | 2023-04-14 | 大庆特博科技发展有限公司 | High-speed air suspension rotor dynamics experimental device |
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2020
- 2020-08-15 CN CN202021700844.4U patent/CN213121109U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916670A (en) * | 2021-10-09 | 2022-01-11 | 东莞青锐科技有限公司 | Axial loading test apparatus and method |
| CN114112393A (en) * | 2021-11-25 | 2022-03-01 | 重庆江增船舶重工有限公司 | Control system of full-floating thrust bearing test bed |
| CN114112393B (en) * | 2021-11-25 | 2024-05-31 | 重庆江增船舶重工有限公司 | Full-floating thrust bearing test bed control system |
| CN114593852A (en) * | 2022-03-07 | 2022-06-07 | 北京理工大学 | Bearing capacity calibration method for dynamic pressure thrust gas bearing |
| CN114608744A (en) * | 2022-03-07 | 2022-06-10 | 北京理工大学 | Bearing capacity calibration system for dynamic pressure thrust gas bearing |
| CN114878163A (en) * | 2022-05-18 | 2022-08-09 | 哈尔滨工业大学 | High-precision dynamic pressure thrust foil bearing dynamic and static synchronous loading testing device |
| CN114878163B (en) * | 2022-05-18 | 2024-01-23 | 哈尔滨工业大学 | Dynamic and static synchronous loading testing device for high-precision dynamic pressure thrust foil bearing |
| CN115962141A (en) * | 2022-12-12 | 2023-04-14 | 大庆特博科技发展有限公司 | High-speed air suspension rotor dynamics experimental device |
| CN115962141B (en) * | 2022-12-12 | 2023-09-26 | 大庆特博科技发展有限公司 | High-speed air suspension rotor dynamics experimental device |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A foil dynamic pressure air thrust bearing test bed Effective date of registration: 20210608 Granted publication date: 20210504 Pledgee: Bank of China Limited by Share Ltd. Wuxi Huishan branch Pledgor: JIANGSU EASYLAND AUTOMOTIVE SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2021980004522 |
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Date of cancellation: 20220726 Granted publication date: 20210504 Pledgee: Bank of China Limited by Share Ltd. Wuxi Huishan branch Pledgor: JIANGSU EASYLAND AUTOMOTIVE SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2021980004522 |