CN114715819A - High-altitude parachuting simulation hydraulic lifting system - Google Patents
High-altitude parachuting simulation hydraulic lifting system Download PDFInfo
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- CN114715819A CN114715819A CN202210508055.8A CN202210508055A CN114715819A CN 114715819 A CN114715819 A CN 114715819A CN 202210508055 A CN202210508055 A CN 202210508055A CN 114715819 A CN114715819 A CN 114715819A
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- 238000004088 simulation Methods 0.000 title claims abstract description 26
- 239000002184 metal Substances 0.000 claims description 3
- 230000003028 elevating effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 36
- 230000009191 jumping Effects 0.000 description 6
- 230000005484 gravity Effects 0.000 description 5
- 239000010720 hydraulic oil Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D23/00—Training of parachutists
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F13/00—Common constructional features or accessories
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- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a high-altitude parachuting simulation hydraulic lifting system, which comprises: oil supply unit, control assembly and elevating system. The oil supply assembly comprises an oil tank and a motor pump set. The control component comprises a proportional reversing valve and an adjustable overflow valve, and the proportional reversing valve is provided with a port P, a port T, a port A and a port B. When the left station of the proportional reversing valve works, the port P is communicated with the port A, and the port B is communicated with the port T; when the middle station of the proportional reversing valve works, all the oil ports are mutually disconnected; when the right station of the proportional reversing valve works, the port P is communicated with the port B, and the port A is communicated with the port T. An oil inlet of the lifting mechanism and one end of the adjustable overflow valve are connected in parallel with the port A, and an oil return port of the lifting mechanism and the other end of the adjustable overflow valve are connected in parallel with the oil tank. The system can control the lifting mechanism to ascend and descend, so that the high-altitude rapid descending state can be simulated, and the efficiency and the safety of high-altitude parachuting training are improved.
Description
Technical Field
The invention relates to a high-altitude parachuting simulation hydraulic lifting system.
Background
High-altitude parachuting is extremely dangerous movement. In order to ensure that the parachute jumping personnel can master the operating skills well and avoid safety accidents of the personnel during real jumping, the skill training is generally required to be completed on the ground. At present, the existing training equipment lacks the training equipment which truly simulates the high-altitude parachuting environment and ensures the safety, and directly influences the efficiency and the safety of the high-altitude parachuting training.
Disclosure of Invention
The invention aims to overcome the defect that equipment for truly simulating a high-altitude parachuting environment is lacked in the prior art, and provides a high-altitude parachuting simulation hydraulic lifting system capable of solving the problems.
The invention solves the technical problems through the following technical scheme:
a high-altitude parachuting simulation hydraulic lifting system is characterized by comprising:
the oil supply assembly comprises an oil tank and a motor pump set;
the control assembly comprises a proportional reversing valve and an adjustable overflow valve, the proportional reversing valve is a three-position four-way valve and is provided with a port P, a port T, a port A and a port B, the port P is connected with an oil outlet of the motor pump set, and the port T is connected with the oil tank; when the left station of the proportional reversing valve works, the port P is communicated with the port A, and the port B is communicated with the port T; when the middle station of the proportional reversing valve works, all the oil ports are mutually disconnected; when the right station of the proportional reversing valve works, the port P is communicated with the port B, and the port A is communicated with the port T;
the oil inlet of the lifting mechanism and one end of the adjustable overflow valve are connected in parallel to the port A, the oil return port of the lifting mechanism and the other end of the adjustable overflow valve are connected in parallel to the oil tank, and the lifting mechanism can ascend or descend.
Preferably, the lifting mechanism includes a base, a scissor mechanism, a platform and a hydraulic cylinder, one end of the bottom of the scissor mechanism is hinged to the base, the other end of the bottom of the scissor mechanism is slidably connected to the base, one end of the top of the scissor mechanism is hinged to the platform, the other end of the top of the scissor mechanism is slidably connected to the platform, the hydraulic cylinder is connected to the scissor mechanism and drives the scissor mechanism to ascend or descend, a rodless cavity of the hydraulic cylinder is communicated with the port a, and a rod cavity of the hydraulic cylinder is communicated with the oil tank.
Preferably, the lifting mechanism further comprises an explosion-proof valve, and the explosion-proof valve is mounted on a pipeline between the rodless cavity of the hydraulic cylinder and the port a.
Preferably, the high-altitude parachuting simulation hydraulic lifting system further comprises a safety valve, one end of the safety valve is connected to a pipeline between the motor pump set and the port a, and the other end of the safety valve is connected to the oil tank.
Preferably, the high-altitude parachuting simulation hydraulic lifting system further comprises a one-way valve, the one-way valve is connected to a pipeline between the motor-pump set and the port a, and the one-way valve and the safety valve are connected in parallel to the motor-pump set.
Preferably, high altitude parachuting simulation hydraulic lifting system still includes reposition of redundant personnel collecting valve, reposition of redundant personnel collecting valve has three hydraulic fluid port, the quantity of pneumatic cylinder is two, an hydraulic fluid port of reposition of redundant personnel collecting valve connect in the A mouth, two other hydraulic fluid ports of reposition of redundant personnel collecting valve connect in two the rodless chamber of pneumatic cylinder, explosion-proof valve is located the rodless chamber of pneumatic cylinder with pipeline between the reposition of redundant personnel collecting valve.
Preferably, a pressure gauge is connected to a pipeline between the motor pump set and the one-way valve.
Preferably, a pressure sensor is connected to a pipeline between the motor-pump set and the one-way valve.
Preferably, the high-altitude parachuting simulation hydraulic lifting system further comprises a fan with an air outlet vertically upward, the fan is installed at the bottom of the platform, and a bottom plate of the platform is of a metal mesh structure.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: the system can control the lifting mechanism to slowly rise and quickly fall, so that the high-altitude quick falling state can be simulated, and the efficiency and the safety of high-altitude parachuting training are improved.
Drawings
Fig. 1 is a hydraulic schematic diagram of a high-altitude parachute jumping simulation hydraulic lifting system in a preferred embodiment of the invention.
Fig. 2 is a schematic structural diagram of a high-altitude parachute jumping simulation hydraulic lifting system in the preferred embodiment of the invention.
Description of reference numerals:
Motor-pump unit 120
Return oil filter 130
A port 213
Explosion-proof valve 400
Flow distributing and collecting valve 600
Check valve 900
Detailed Description
The present invention will be more clearly and completely described in the following description of preferred embodiments, taken in conjunction with the accompanying drawings.
Fig. 1 and 2 show a high-altitude parachuting simulation hydraulic lifting system, which comprises: oil feeding unit 100, control unit 200, and lifting mechanism 300. The oil supply assembly 100 includes an oil tank 110 and a motor-pump group 120. The control assembly 200 comprises a proportional directional valve 210 and an adjustable overflow valve 220, the proportional directional valve 210 is a three-position four-way valve, the proportional directional valve 210 is provided with a P port 211, a T port 212, an A port 213 and a B port 214, the P port 211 is connected with an oil outlet of the motor-pump set 120, and the T port 212 is connected with the oil tank 110. When the left station of the proportional directional valve 210 works, the port P211 is communicated with the port A213, and the port B214 is communicated with the port T212; when the middle station of the proportional reversing valve 210 works, all the oil ports are mutually disconnected; when the right station of the proportional directional valve 210 works, the port P211 is communicated with the port B214, and the port A213 is communicated with the port T212. An oil inlet of the lifting mechanism 300 and one end of the adjustable overflow valve 220 are connected in parallel to the port a 213, an oil return port of the lifting mechanism 300 and the other end of the adjustable overflow valve 220 are connected in parallel to the oil tank 110, and the lifting mechanism 300 can ascend or descend.
The system is used for assisting high-altitude parachuting training, and the specific working process is as follows: when the training personnel need to be lifted to the highest position, the overflow pressure value of the adjustable overflow valve 220 is adjusted to be larger than the hydraulic value of the gravity of the training personnel and the gravity of the lifting mechanism 300 to the system, the training personnel stands at the top of the lifting mechanism 300, the proportional directional valve 210 is in the working state of the left station, the motor pump unit 120 is started, hydraulic oil is input into the proportional directional valve 210 through the motor pump unit 120 and enters the lifting mechanism 300 through the P port 211 and the A port 213, and the lifting mechanism 300 is driven to ascend until the highest position stops. The ascending speed of the elevator mechanism 300 can be adjusted by adjusting the opening state of the proportional directional valve 210. When the lifting mechanism 300 needs to be quickly lowered to simulate a parachute jumping state, the proportional directional valve 210 is in a middle working position working state, the overflow pressure value of the adjustable overflow valve 220 is adjusted, the pressure value is smaller than the hydraulic value of the gravity of a trainer and the gravity of the lifting mechanism 300 to the system, and the trainer descends along with the lifting mechanism 300 by means of the gravity, so that the trainer feels the sensation of parachute jumping weightlessness. The descending speed of the training personnel and the lifting mechanism 300 can be changed by adjusting the overflow pressure value of the adjustable overflow valve 220, and the requirements of different training stages are met. When the quick oil drainage of the system is needed, the proportional directional valve 210 needs to be in a right station working state, and at the moment, the hydraulic oil in the system is quickly drained into the oil tank 110 through the A port 213 and the T port 212. The system can control the lifting mechanism 300 to slowly rise and quickly fall, so that the high-altitude quick falling state can be simulated, and the efficiency and the safety of high-altitude parachuting training are improved.
In this embodiment, the lifting mechanism 300 includes a base 310, a scissor mechanism 320, a platform 330, and a hydraulic cylinder 340, one end of the bottom of the scissor mechanism 320 is hinged to the base 310, the other end of the bottom of the scissor mechanism 320 is slidably connected to the base 310, one end of the top of the scissor mechanism 320 is hinged to the platform 330, the other end of the top of the scissor mechanism 320 is slidably connected to the platform 330, the hydraulic cylinder 340 is connected to the scissor mechanism 320 and drives the scissor mechanism 320 to ascend or descend, a rodless cavity of the hydraulic cylinder 340 is communicated with the port a 213, and a rod cavity of the hydraulic cylinder 340 is communicated with the oil tank 110. The piston rod of the hydraulic cylinder 340 drives the scissor mechanism 320 to perform scissor movement, so that the platform 330 can be quickly lifted or lowered, and the requirement of high-speed lowering required by training is met.
In order to avoid the system from being decompressed due to the rupture of the hydraulic oil pipeline, which directly causes the platform 330 to stall and descend, and endangers the life safety of the trainers, the lifting mechanism 300 further comprises an explosion-proof valve 400, and the explosion-proof valve 400 is arranged on the pipeline between the rodless cavity of the hydraulic cylinder 340 and the A port 213. The explosion-proof valve 400 is generally installed near the hydraulic cylinder 340, and can maintain the pressure of the hydraulic cylinder 340 when the piping system is depressurized.
In order to further improve the safety of the system and prevent the oil pressure of the system from being too high, the high-altitude parachuting simulation hydraulic lifting system further comprises a safety valve 500, one end of the safety valve 500 is connected to a pipeline between the motor-pump set 120 and the port A213, and the other end of the safety valve 500 is connected to the oil tank 110. When the oil pressure value at the outlet of the motor-pump set 120 is higher than the set pressure value of the relief valve 500, the hydraulic oil returns to the oil tank 110 through the relief valve 500.
In addition, the high-altitude parachuting simulation hydraulic lifting system further comprises a one-way valve 900, the one-way valve 900 is connected to a pipeline between the motor-pump set 120 and the port A213, and the one-way valve 900 and the safety valve 500 are connected in parallel to the motor-pump set 120. The check valve 900 can prevent the hydraulic oil from flowing reversely and damaging the hydraulic components such as the motor-pump unit 120.
In order to meet the requirement of high-altitude parachuting training, the platform 330 is generally set to be higher, so that the joints of the scissors mechanism 320 are more, the frictional resistance generated by a plurality of joints is also larger, and the phenomena of blocking and the like are easily generated. In order to solve the above problems, the high-altitude parachuting simulation hydraulic lifting system further comprises a flow distribution and collection valve 600, the flow distribution and collection valve 600 has three oil ports, the number of the hydraulic cylinders 340 is two, one oil port of the flow distribution and collection valve 600 is connected to the port a 213, the other two oil ports of the flow distribution and collection valve 600 are connected to rodless cavities of the two hydraulic cylinders 340, and the anti-explosion valve 400 is located on a pipeline between the rodless cavity of the hydraulic cylinder 340 and the flow distribution and collection valve 600. The two hydraulic cylinders 340 work simultaneously, so that the possibility of clamping the scissor mechanism 320 can be reduced, and the pushing and lifting capacity and the pushing and lifting speed are improved. The flow dividing and combining valve 600 can balance the flow of the two lift cylinders so as to control the synchronous movement of the two lift cylinders.
In order to facilitate the real-time observation of the pressure condition of the system, a pressure gauge 700 and a pressure sensor 800 are connected to a pipeline between the motor-pump unit 120 and the check valve 900. The pressure sensor 800 can realize automatic control of the system, so that the system is more intelligent.
In order to simulate the wind speed and the wind volume at different heights and under different environments during high-altitude parachuting, the high-altitude parachuting simulation hydraulic lifting system further comprises a fan 350 with an air outlet vertically upward, the fan 350 is installed at the bottom of the platform 330, and the bottom plate of the platform 330 is of a metal mesh structure.
In this embodiment, the oil supply unit 100 further includes an oil return filter 130, an oil supply filter 140, an air filter 150, a liquid level meter 160, and the like.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (9)
1. A high-altitude parachuting simulation hydraulic lifting system is characterized by comprising:
the oil supply assembly comprises an oil tank and a motor pump set;
the control assembly comprises a proportional reversing valve and an adjustable overflow valve, the proportional reversing valve is a three-position four-way valve and is provided with a P port, a T port, an A port and a B port, the P port is connected with an oil outlet of the motor pump set, and the T port is connected with the oil tank; when the left station of the proportional reversing valve works, the port P is communicated with the port A, and the port B is communicated with the port T; when the middle station of the proportional reversing valve works, all the oil ports are mutually disconnected; when the right station of the proportional reversing valve works, the port P is communicated with the port B, and the port A is communicated with the port T;
the oil inlet of the lifting mechanism and one end of the adjustable overflow valve are connected in parallel to the port A, the oil return port of the lifting mechanism and the other end of the adjustable overflow valve are connected in parallel to the oil tank, and the lifting mechanism can ascend or descend.
2. The high-altitude parachuting simulation hydraulic lifting system according to claim 1, wherein the lifting mechanism comprises a base, a scissor mechanism, a platform and a hydraulic cylinder, one end of the bottom of the scissor mechanism is hinged to the base, the other end of the bottom of the scissor mechanism is slidably connected with the base, one end of the top of the scissor mechanism is hinged to the platform, the other end of the top of the scissor mechanism is slidably connected with the platform, the hydraulic cylinder is connected to the scissor mechanism and drives the scissor mechanism to ascend or descend, a rodless cavity of the hydraulic cylinder is communicated with the port a, and a rod cavity of the hydraulic cylinder is communicated with the oil tank.
3. The high-altitude parachuting simulation hydraulic lifting system according to claim 2, wherein the lifting mechanism further comprises an explosion-proof valve mounted on a pipeline between the rodless chamber of the hydraulic cylinder and the port a.
4. The high-altitude parachuting simulation hydraulic lifting system as recited in claim 3, further comprising a safety valve, one end of the safety valve being connected to a pipeline between the motor-pump set and the port A, and the other end of the safety valve being connected to the oil tank.
5. The high altitude parachute simulation hydraulic lifting system of claim 4, further comprising a check valve connected to a pipeline between the motor-pump set and the port A, wherein the check valve and the safety valve are connected in parallel to the motor-pump set.
6. The high-altitude parachuting simulation hydraulic lifting system according to claim 5, further comprising a flow dividing and collecting valve, wherein the flow dividing and collecting valve has three oil ports, the number of the hydraulic cylinders is two, one oil port of the flow dividing and collecting valve is connected to the port A, the other two oil ports of the flow dividing and collecting valve are connected to the rodless cavities of the two hydraulic cylinders, and the explosion-proof valve is located on a pipeline between the rodless cavity of the hydraulic cylinder and the flow dividing and collecting valve.
7. The high-altitude parachuting simulation hydraulic lifting system as claimed in claim 6, wherein a pressure gauge is connected to a pipeline between the motor-pump set and the one-way valve.
8. The high-altitude parachuting simulation hydraulic lifting system as claimed in claim 6, wherein a pressure sensor is connected to a pipeline between the motor-pump set and the one-way valve.
9. The high-altitude parachuting simulation hydraulic lifting system as recited in claim 6, further comprising a fan with an upward vertical exhaust outlet, wherein the fan is installed at the bottom of the platform, and the bottom plate of the platform is of a metal net structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210508055.8A CN114715819B (en) | 2022-05-10 | 2022-05-10 | High-altitude parachuting simulation hydraulic lifting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210508055.8A CN114715819B (en) | 2022-05-10 | 2022-05-10 | High-altitude parachuting simulation hydraulic lifting system |
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| Publication Number | Publication Date |
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| CN114715819A true CN114715819A (en) | 2022-07-08 |
| CN114715819B CN114715819B (en) | 2023-06-23 |
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| CN202210508055.8A Active CN114715819B (en) | 2022-05-10 | 2022-05-10 | High-altitude parachuting simulation hydraulic lifting system |
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| RU87091U1 (en) * | 2009-05-21 | 2009-09-27 | Александр Иванович ЕВТУШЕНКО | Inertial Trainer |
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| CA3064401A1 (en) * | 2019-09-06 | 2021-03-06 | Zhejiang Dingli Machinery Co., Ltd. | Control valve, derricking cyclinder and working method thereof, aerial work platform |
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| CN216311096U (en) * | 2021-09-08 | 2022-04-15 | 合肥云艺化科技有限公司 | VR that takes safety belt simulation experience platform that falls |
| CN114370437A (en) * | 2021-12-31 | 2022-04-19 | 杭叉集团股份有限公司 | Scissor-fork type aerial work platform lifting hydraulic control system |
| US20220126972A1 (en) * | 2020-10-28 | 2022-04-28 | Naiad Maritime Group, Inc. | Marine Vessel Brake Assist And Stabilization System |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU87091U1 (en) * | 2009-05-21 | 2009-09-27 | Александр Иванович ЕВТУШЕНКО | Inertial Trainer |
| CN103692445A (en) * | 2013-12-08 | 2014-04-02 | 中国科学院合肥物质科学研究院 | Electro-hydraulic servo heavy load parallel connection platform control system for nuclear fusion device and control method thereof |
| CA3064401A1 (en) * | 2019-09-06 | 2021-03-06 | Zhejiang Dingli Machinery Co., Ltd. | Control valve, derricking cyclinder and working method thereof, aerial work platform |
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| CN112065786A (en) * | 2020-08-27 | 2020-12-11 | 广州宝力特液压密封有限公司 | Hydraulic system of seesaw roller coaster |
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| US20220126972A1 (en) * | 2020-10-28 | 2022-04-28 | Naiad Maritime Group, Inc. | Marine Vessel Brake Assist And Stabilization System |
| CN216311096U (en) * | 2021-09-08 | 2022-04-15 | 合肥云艺化科技有限公司 | VR that takes safety belt simulation experience platform that falls |
| CN114198353A (en) * | 2021-12-31 | 2022-03-18 | 杭叉集团股份有限公司 | Scissor fork type aerial work platform hydraulic control system |
| CN114370437A (en) * | 2021-12-31 | 2022-04-19 | 杭叉集团股份有限公司 | Scissor-fork type aerial work platform lifting hydraulic control system |
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| Publication number | Publication date |
|---|---|
| CN114715819B (en) | 2023-06-23 |
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Denomination of invention: High altitude parachute simulation hydraulic lifting system Granted publication date: 20230623 Pledgee: Agricultural Bank of China Limited Shanghai Songjiang Sub-branch Pledgor: Shanghai shengkesisi Hydraulic Co.,Ltd. Registration number: Y2024980001578 |