Hydraulic dynamometer of marine power device
By designing a hydraulic dynamometer for marine power plants, using circulating water medium and load monitoring equipment, the instability and resource waste of engine testing equipment in the prior art are solved, and efficient and stable engine testing is achieved.
Patent Information
- Application Number
- CN202510709938.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-29
- Publication Date
- 2025-08-26
AI Technical Summary
Existing marine engine testing equipment consumes manpower and material resources when replacing loads, and increasing load devices will take up space and increase unstable factors, which cannot guarantee continuous engine testing.
A hydraulic dynamometer with marine power equipment is designed, using circulating water as the medium, and through the control of the inlet valve and outlet valve, combined with the load monitoring equipment, the constant torque and speed mode is achieved, the engine power is absorbed, and the dynamic balance in the dynamometer is maintained through the low-temperature water tank and the heat dissipation fins.
It improves the stability and adaptability of the dynamometer, reduces the equipment failure rate and maintenance rate, reduces the cost, and is suitable for high-power prime mover tests.
Smart Images
Figure CN120538720A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of marine hydraulic dynamometer, in particular to a hydraulic dynamometer for a marine power plant. Background Art
[0002] With the development of international shipping and ocean-going vessel transportation, marine engines are becoming increasingly powerful, and factory testing for engines is becoming increasingly stringent. Consequently, the stability and versatility of dynamometers are becoming increasingly important. Consequently, dynamometers using circulating water as a medium and featuring constant torque control and speed modes have come into their own. The newly invented hydraulic dynamometer boasts high power absorption, making it suitable for testing high-power prime movers. Its automated control system makes various tests simple and easy to perform.
[0003] The current solution for large engines involves adding various mechanical loads to the engine, constantly replacing them when the load fluctuates significantly. Alternatively, a generator and a load device are added. Neither solution solves the problem in a timely manner. Constantly changing loads prevents continuous engine testing, consumes significant manpower and material resources, and has functional drawbacks. Adding generators and load devices takes up a lot of space, complicates wiring, and increases instability, resulting in a significant waste of resources.
[0004] Therefore, it is necessary to provide a new hydraulic dynamometer for a marine power plant to solve the above technical problems. Summary of the Invention
[0005] In order to solve the above technical problems, the present invention provides a hydraulic dynamometer for a marine power plant.
[0006] The present invention provides a hydraulic dynamometer for a marine power plant, comprising: a supporting platform, a driving assembly, a low-temperature water tank, a controller, a drain pipe, and a supporting assembly. The top of the supporting platform is fixedly connected to a dynamometer main device via a metal sheet, one end of the dynamometer main device is fixedly connected to a water outlet valve, an end of the water outlet valve away from the dynamometer main device is provided with a drain pipe, the other end of the dynamometer main device is fixedly connected to a water inlet valve, an end of the water inlet valve away from the dynamometer main device is fixedly connected to a water inlet pipe, the top of the supporting platform is symmetrically fixedly connected to support plates, the tops of the two support plates are both provided with driving assemblies, and a device installed inside which the water outlet valve is fixed is provided. The driving assembly at the top of one support plate is a drainage driving assembly, the driving assembly at the top of the other support plate with a water inlet valve fixed inside is a water inlet driving assembly, the bottom end of the support platform is fixedly connected to a low-temperature water tank, one side of the low-temperature water tank is fixedly connected to a water pump, the outside of the low-temperature water tank is fixedly connected to a plurality of cooling fins, the top rear side of the support platform is fixedly connected to a controller, an operation screen is installed inside the top of the controller, a load monitoring device is installed on the outside of the dynamometer main body, the bottom end of the dynamometer main body is fixedly connected to a drain pipe, the bottom end of the drain pipe is fixedly connected to a drain valve, and a support assembly is installed at the bottom end of the support platform.
[0007] Preferably, the driving assembly includes a servo motor, the bottom end of the servo motor is fixedly connected to the top end of the support plate, a servo amplifier is installed on the outside of the servo motor, and a speed regulator is fixedly connected to the driving end of the servo motor.
[0008] Preferably, the outside of the water outlet valve is fixedly connected to the inside of one of the support plates, and the outside of the water inlet valve is fixedly connected to the inside of the other support plate.
[0009] Preferably, the top of the support platform is symmetrically and fixedly connected with L-shaped support blocks, and the interiors of the two L-shaped support blocks are fixedly connected to the exteriors of the drain pipe and the water inlet pipe respectively.
[0010] Preferably, the top of the water pump is fixedly connected to the bottom of the support platform, the end of the drain pipe away from the water outlet valve is fixedly connected to the side of the low-temperature water tank away from the water pump, and the end of the water inlet pipe away from the water inlet valve is fixedly connected to the output end of the water pump.
[0011] Preferably, the outside of the drain valve is fixedly connected to the inside of the top of the support platform, and the output port of the drain valve is fixedly connected to the inside of the top of the low-temperature water tank.
[0012] Preferably, the output end of one of the speed regulators is fixedly connected to the water outlet valve, the output end of the other speed regulator is fixedly connected to the water inlet valve, and the bottom end of the speed regulator is fixedly connected to the top end of the support plate.
[0013] Preferably, the support assembly includes a plurality of support legs, the top ends of the plurality of support legs are fixedly connected to the four corners of the bottom end of the support platform, and the bottom ends of the support legs are fixedly connected to gaskets.
[0014] Compared with the related art, the hydraulic dynamometer for a marine power plant provided by the present invention has the following beneficial effects:
[0015] This invention effectively combines an inlet valve, a drain valve, and a load monitoring device. As the eddy currents that generate braking force are converted into heat energy, the temperature of the water within the hydraulic dynamometer rises. This device can promptly compensate for the power-related cold water flow, preventing overheating within the device and minimizing damage to the device caused by poorly conditioned water. This increases the dynamometer's service life and reduces its accident and maintenance rates. This invention offers the advantages of stability, reliability, simplicity, and low cost, making it suitable for testing high-power prime movers.
[0016] The present invention uses circulating water as the medium and can effectively absorb the power of the marine engine by controlling the opening of the water inlet valve and the water outlet valve, maintaining the dynamic balance in the dynamometer. It can adapt to the testing requirements of different working conditions and greatly improves the stability of the dynamometer compared with traditional solutions. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic structural diagram of a hydraulic dynamometer for a marine power plant provided by the present invention;
[0018] Figure 2 for Figure 1 The structural schematic diagram of the low-temperature water tank shown;
[0019] Figure 3 for Figure 1 A schematic structural diagram of the support platform shown;
[0020] Figure 4 for Figure 2 A magnified view of point A in the figure;
[0021] Figure 5 for Figure 2 Enlarged view of point B in FIG.
[0022] Figure 6 for Figure 1 Schematic diagram of the method shown;
[0023] Figure 7 for Figure 1 Schematic diagram of the specific implementation method shown.
[0024] Numbers in the figure: 1. Support platform; 2. Dynamometer main equipment; 3. Water outlet valve; 4. Drain pipe; 5. Water inlet valve; 6. Water inlet pipe; 7. Support plate; 8. Servo motor; 9. Servo amplifier; 10. Speed regulator; 11. L-shaped support block; 12. Low-temperature water tank; 13. Water pump; 14. Heat sink fins; 15. Controller; 16. Operation screen; 17. Load monitoring equipment; 18. Drain pipe; 19. Drain valve; 20. Support leg; 21. Gasket. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0026] The specific implementation of the present invention is described in detail below with reference to specific embodiments.
[0027] See also Figures 1 to 7 A hydraulic dynamometer for a marine power plant includes: a support platform 1, which serves as the basic bearing structure of the entire hydraulic dynamometer. The top of the support platform 1 is fixedly connected to a dynamometer body device 2 through a metal sheet. The dynamometer body device 2 is the core component for achieving power absorption and testing. One end of the support platform 1 is fixedly connected to a water outlet valve 3. The water outlet valve 3 is used to control the discharge of high-temperature water after absorbing power. A drain pipe 4 is installed at the end away from the dynamometer body device 2. The drain pipe 4 provides a channel for discharging high-temperature water and guides the water to a specific location. The other end of the dynamometer main body device 2 is fixedly connected to a water inlet valve 5, which is responsible for regulating the inflow of low-temperature water. The end away from the dynamometer main body device 2 is fixedly connected to a water inlet pipe 6, which transports low-temperature water from the water source to the water inlet valve 5. The top of the support platform 1 is symmetrically fixedly connected with a support plate 7, which plays an auxiliary support and positioning role. The outside of the water outlet valve 3 is fixedly connected to the inside of one support plate 7, and the outside of the water inlet valve 5 is fixedly connected to the inside of the other support plate 7. This connection method enables the water outlet valve 3 and the water inlet valve 5 to be firmly installed.
[0028] The tops of the two support plates 7 are both equipped with drive components. The drive component installed on the top of one support plate 7 with the outlet valve 3 fixed inside is the drainage drive component, and the drive component installed on the top of the other support plate 7 with the inlet valve 5 fixed inside is the water inlet drive component. The drive component includes a servo motor 8. The bottom end of the servo motor 8 is fixedly connected to the top of the support plate 7 to ensure stability during operation. A servo amplifier 9 is installed on the outside of the servo motor 8. The servo amplifier 9 can amplify the control signal to drive the servo motor 8 to operate. The driving end of the servo motor 8 is fixedly connected to a speed regulator 10. The speed regulator 10 can adjust the speed of the servo motor 8 according to the received signal. The output end of one speed regulator 10 is fixedly connected to the water outlet valve 3, and the output end of the other speed regulator 10 is fixedly connected to the water inlet valve 5. The bottom end of the speed regulator 10 is fixedly connected to the top of the support plate 7. The top of the support platform 1 is symmetrically fixedly connected with an L-shaped support block 11. The L-shaped support block 11 provides additional support and fixation for the drain pipe 4 and the water inlet pipe 6. The inside of the two L-shaped support blocks 11 are fixedly connected to the outside of the drain pipe 4 and the water inlet pipe 6, respectively, which enhances the stability of the pipeline connection and prevents the pipeline from shaking or shifting.
[0029] The bottom end of the support platform 1 is fixedly connected to a low-temperature water tank 12, which is used to store low-temperature water and provide a continuous cooling water source for the dynamometer. A water pump 13 is fixedly connected to one side of the support platform 1. The top of the water pump 13 is fixedly connected to the bottom end of the support platform 1. The water pump 13 provides power for the circulation of low-temperature water. The end of the drain pipe 4 away from the outlet valve 3 is fixedly connected to the side of the low-temperature water tank 12 away from the water pump 13, and the end of the water inlet pipe 6 away from the water inlet valve 5 is fixedly connected to the output end of the water pump 13, forming a circulation loop of low-temperature water. The outside of the low-temperature water tank 12 is fixedly connected to a plurality of heat dissipation fins 14. The heat dissipation fins 14 increase the heat dissipation area, speed up the heat dissipation speed of the water in the water tank, and help maintain the temperature of the low-temperature water. The rear side of the top of the support platform 1 is fixedly connected to a controller 15. The controller 15 is the control center of the entire dynamometer. An operation screen 16 is installed inside the top of the controller 15. The operation screen 16 facilitates the operator to intuitively set parameters, issue instructions and monitor the operating status of the dynamometer in real time. A load monitoring device 17 is installed outside the dynamometer main device 2. The load monitoring device 17 can monitor the power absorbed by the dynamometer main device in real time and accurately, and feed back the data to the controller 15. The bottom end of the dynamometer main device 2 is fixedly connected to a drain pipe 18. The drain pipe 18 is used to discharge water in the dynamometer under specific circumstances. The bottom end of the drain pipe 18 is fixedly connected to a drain valve 19. The drain valve 19 can control the on and off of the drain. The outside of the drain valve 19 is fixedly connected to the top interior of the support platform 1, and the output port of the drain valve 19 is fixedly connected to the top interior of the low-temperature water tank 12 to ensure that the discharged water can flow back to the low-temperature water tank 12.
[0030] A support assembly is installed at the bottom end of the support platform 1, and the support assembly includes multiple support legs 20. The top ends of the multiple support legs 20 are fixedly connected to the four corners of the bottom end of the support platform 1, which can bear the weight of the entire dynamometer and provide stable support. The bottom end of the support leg 20 is fixedly connected to a gasket 21, which can increase the friction with the ground and prevent the dynamometer from being displaced during operation. At the same time, it can also play a role in buffering and shock absorption, reducing the impact of vibration generated during operation on the equipment and the ground.
[0031] The working principle of the hydraulic dynamometer of a marine power plant provided by the present invention is as follows:
[0032] Low-temperature water supply: Turn on the water pump 13. Under the action of the water pump 13, the low-temperature water in the low-temperature water tank 12 flows to the water inlet valve 5 through the water inlet pipe 6. The end of the water inlet pipe 6 away from the water inlet valve is connected to the output end of the water pump 13, providing a channel for the delivery of low-temperature water;
[0033] Water inlet valve control: When low-temperature water needs to enter the dynamometer main device 2, the operator sends a command to the controller 15 through the operation panel 16. The controller 15 uses the bus CC_Link protocol to transmit the calculation results in the form of speed and position instructions to the water inlet valve servo amplifier 9. The water inlet valve servo amplifier 9 and the water inlet valve servo motor 8 form a servo system. According to the received command, the water inlet valve servo motor 8 drives the speed regulator 10, which in turn adjusts the opening of the water inlet valve 5, so that low-temperature water enters the dynamometer main device 2 according to the set flow rate;
[0034] Power absorption: After the low-temperature water enters the dynamometer main device 2, it begins to absorb the power output by the marine engine. The load monitoring device 17 installed on the dynamometer main device 2 monitors the power absorbed by the main device in real time and feeds the data back to the controller 15;
[0035] Water outlet valve adjustment: As the low-temperature water absorbs power in the dynamometer main device 2, the water temperature gradually rises. To maintain the dynamic balance in the dynamometer, the water outlet valve 3 comes into play. Similarly, the operator can issue instructions through the operation panel 16, and the controller 15 controls the servo system composed of the water outlet valve servo amplifier 9 and the water outlet valve servo motor 8 to accurately adjust the opening of the water outlet valve 3, so that the high-temperature water that has absorbed power is discharged through the drain pipe 4. The end of the drain pipe 4 away from the water outlet valve is connected to the side of the low-temperature water tank 12 away from the water pump 13. The discharged high-temperature water can be cooled in the low-temperature water tank 12 for recycling;
[0036] Drain operation: In some cases, such as when the dynamometer needs maintenance or stops running, the water stored in the dynamometer needs to be drained. At this time, open the drain valve 19, and the drain pipe 18 guides the water in the dynamometer main device 2 to the low-temperature water tank 12. The output port of the drain valve 19 is connected to the top of the low-temperature water tank 12 to ensure that the drained water can return to the water tank.
[0037] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A hydraulic dynamometer for a marine power plant, characterized in that: include: A support platform (1) is provided. The top of the support platform (1) is fixedly connected to a dynamometer main body device (2) via a metal sheet. One end of the dynamometer main body device (2) is fixedly connected to a water outlet valve (3). An end of the water outlet valve (3) away from the dynamometer main body device (2) is provided with a drain pipe (4). The other end of the dynamometer main body device (2) is fixedly connected to a water inlet valve (5). An end of the water inlet valve (5) away from the dynamometer main body device (2) is fixedly connected to a water inlet pipe (6). The top of the support platform (1) is symmetrically fixedly connected to a support plate (7). A driving assembly, wherein the top ends of the two support plates (7) are both equipped with a driving assembly, the driving assembly installed on the top end of one of the support plates (7) in which the water outlet valve (3) is fixed is a drainage driving assembly, and the driving assembly installed on the top end of the other support plate (7) in which the water inlet valve (5) is fixed is a water inlet driving assembly; A low-temperature water tank (12), wherein the bottom end of the support platform (1) is fixedly connected to the low-temperature water tank (12), a water pump (13) is fixedly connected to one side of the low-temperature water tank (12), and a plurality of heat dissipation fins (14) are fixedly connected to the outside of the low-temperature water tank (12); A controller (15) is fixedly connected to the rear side of the top of the support platform (1), an operation screen (16) is installed inside the top of the controller (15), and a load monitoring device (17) is installed outside the dynamometer main device (2); A drain pipe (18), the bottom end of the dynamometer main body device (2) is fixedly connected to the drain pipe (18), and the bottom end of the drain pipe (18) is fixedly connected to a drain valve (19); Support assembly: A support assembly is installed at the bottom end of the support platform (1).
2. The hydraulic dynamometer for a marine power plant according to claim 1, characterized in that: The driving assembly comprises a servo motor (8), the bottom end of the servo motor (8) is fixedly connected to the top end of the support plate (7), a servo amplifier (9) is installed outside the servo motor (8), and a speed regulator (10) is fixedly connected to the driving end of the servo motor (8).
3. The hydraulic dynamometer for a marine power plant according to claim 1, characterized in that: The outside of the water outlet valve (3) is fixedly connected to the inside of one of the support plates (7), and the outside of the water inlet valve (5) is fixedly connected to the inside of the other support plate (7).
4. The hydraulic dynamometer for a marine power plant according to claim 1, characterized in that: The top of the support platform (1) is symmetrically and fixedly connected with an L-shaped support block (11), and the interiors of the two L-shaped support blocks (11) are fixedly connected to the exteriors of the drainage pipe (4) and the water inlet pipe (6), respectively.
5. The hydraulic dynamometer for a marine power plant according to claim 1, characterized in that: The top end of the water pump (13) is fixedly connected to the bottom end of the support platform (1), the end of the drain pipe (4) away from the water outlet valve (3) is fixedly connected to the side of the low-temperature water tank (12) away from the water pump (13), and the end of the water inlet pipe (6) away from the water inlet valve (5) is fixedly connected to the output end of the water pump (13).
6. The hydraulic dynamometer for a marine power plant according to claim 1, characterized in that: The outside of the drain valve (19) is fixedly connected to the inside of the top of the support platform (1), and the output port of the drain valve (19) is fixedly connected to the inside of the top of the low-temperature water tank (12).
7. The hydraulic dynamometer for a marine power plant according to claim 2, characterized in that: The output end of one speed regulator (10) is fixedly connected to the water outlet valve (3), the output end of the other speed regulator (10) is fixedly connected to the water inlet valve (5), and the bottom end of the speed regulator (10) is fixedly connected to the top end of the support plate (7).
8. The hydraulic dynamometer for a marine power plant according to claim 1, characterized in that: The support assembly comprises a plurality of support legs (20), the top ends of the plurality of support legs (20) are fixedly connected to the four corners of the bottom end of the support platform (1), and the bottom ends of the support legs (20) are fixedly connected to gaskets (21).