Bench test device for hydraulic performance of water jet propulsion device

Abstract

The utility model provides a hydraulic performance bench test device for a water jet propulsion device, which comprises a water tank, a deck, a water jet propulsion device, a detection pipeline, a water intake pipe, a water return pipe and a driving device, the water tank is rectangular and is filled with water, the deck is fixedly connected to the water tank, and openings are respectively formed in positions, corresponding to the water intake pipe and the water return pipe, on the deck; the water jet propulsion device, the detection pipeline and the driving device are mounted on the deck; the water spraying propulsion device is driven by a driving device and is connected with a detection pipeline, an outlet of the detection pipeline is connected with the water return pipe, and an inlet of the water spraying propulsion device is connected with a water taking pipe. The hydraulic performance bench test device for the water jet propulsion device can simulate the application scene of the ship loading and mooring working condition of the water jet propulsion device, and is used for detecting hydraulic performance parameters, bearing temperature rise, vibration and the like of a water jet propulsion pump at different rotating speeds; and water in the water tank can be recycled.

Description

Technical Field

[0001] This utility model relates to the technical field of test benches for ship waterjet propulsion devices, and more specifically to a test bench device for the hydraulic performance of waterjet propulsion devices. Background Technology

[0002] CN104215426B discloses a device and method for measuring the internal flow field and external characteristics of a waterjet propulsion device, and CN119354480A discloses a waterjet propulsion test bench and its usage method for internal flow field testing, instantaneous thrust testing, and hydraulic performance testing. Both existing technologies are currently designed for performance testing of scaled-down models of waterjet propulsion devices and cannot meet the power and size requirements of the test device for factory testing and inspection of actual-sized high-power waterjet propulsion products. Summary of the Invention

[0003] The technical problem to be solved by this utility model embodiment is to provide a test bench for the hydraulic performance of a waterjet propulsion device, which can simulate the application scenario of a waterjet propulsion device being installed on a ship and moored.

[0004] To address the aforementioned technical problems, this utility model provides a test bench for the hydraulic performance of a water jet propulsion device, comprising a water tank, a deck, a water jet propulsion device, a testing pipeline, a water intake pipe, a water return pipe, and a drive device. The water tank is rectangular and filled with water. The deck is fixedly connected to the water tank, and the deck has a water intake opening corresponding to the water intake pipe and a water return opening corresponding to the water return pipe. The water jet propulsion device, the testing pipeline, and the drive device are mounted on the deck. The water jet propulsion device is driven by the drive device and is connected to the testing pipeline. The outlet of the testing pipeline is connected to the water return pipe, and the inlet of the water jet propulsion device is connected to the water intake pipe.

[0005] The drive unit includes a motor, a reducer, a dynamometer, and a universal joint. The motor drives the water jet propulsion device through the reducer, dynamometer, and universal joint.

[0006] The detection pipeline includes a nozzle straight pipe, a diffuser pipe, a transition straight pipe, a first straight pipe, a second straight pipe, and a third straight pipe. The inlet of the diffuser pipe is connected to the outlet of the water jet propulsion device through the nozzle straight pipe. The diffuser pipe is a tapered pipe with a flared end. The outlet of the diffuser pipe is connected to the transition straight pipe. The transition straight pipe is connected to the first straight pipe, and a corrugated expansion joint is installed between them. An electromagnetic flowmeter is installed between the first and second straight pipes.

[0007] The inlet diameter of the diffuser is 0.5 to 0.6 times the outlet diameter, and the length is 5 to 6 times the inlet diameter; the first straight pipe, the second straight pipe, and the third straight pipe have the same diameter.

[0008] A corrugated expansion joint is installed between the transition straight pipe and the first straight pipe; the minimum diameter of the corrugated expansion joint is equal to the diameter of the first straight pipe.

[0009] A butterfly valve is also installed between the second and third straight pipes to control the flow cross-section and flow rate within the pipe.

[0010] The reducer is also equipped with a torque and speed sensor on its output shaft to detect the torque and speed of the output shaft.

[0011] This utility model provides a hydraulic performance test bench for a waterjet propulsion device, which can simulate the application scenario of a waterjet propulsion device being installed on a ship and moored. It is used to detect the hydraulic performance parameters, bearing temperature rise, and vibration of the waterjet propulsion pump at different speeds. The water in the pool can be recycled. Attached Figure Description

[0012] Figure 1 This is a front sectional view of the hydraulic performance test bench of the water jet propulsion device of this utility model.

[0013] Figure 2 This is a top view of the hydraulic performance test bench of the water jet propulsion device of this utility model.

[0014] Figure 3 This is the front view of the hydraulic performance test bench of the water jet propulsion device of this utility model.

[0015] Figure 4 This is a top view of the hydraulic performance test bench of the water jet propulsion device of this utility model.

[0016] In the picture:

[0017] Water tank; 11-Deck; 12-Water intake opening; 13-Water return opening;

[0018] 20-Intake pipe; 21-Transition pipe; 22-Water jet propulsion device; 231-Straight nozzle pipe; 232-Diffuser pipe; 233-Transition straight pipe; 234-Corrugated expansion joint; 235-First straight pipe; 236-Electromagnetic flow meter; 237-Second straight pipe; 238-Butterfly valve; 239-Third straight pipe; 24-Bend; 25-Return pipe;

[0019] 31-Electric motor; 32-Reducer; 33-Dynamometer; 34-Universal shaft; Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0021] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] like Figure 1-4 As shown, this utility model provides a test bench for the hydraulic performance of a water jet propulsion device, including a water tank 10, a deck 11, a water jet propulsion device 22, a test pipeline 23, a water intake pipe 20, a return water pipe 25, and a drive device 30. The water tank 10 is rectangular and filled with water. The deck 11 is fixedly connected to the water tank 10. The deck 11 has a water intake opening 12 corresponding to the position of the water intake pipe 20 and a return water opening 13 corresponding to the position of the return water pipe 25. Both the water intake opening 12 and the return water opening 13 can be rectangular open shapes. It can be designed as an openable structure; the water jet propulsion device 22, the detection pipe 23, and the drive device 30 are mounted on the deck 11; the water jet propulsion device 22 is driven by the drive device 30, and the water jet propulsion device 22 is connected to the detection pipe 23. The outlet of the detection pipe 23 is connected to the return water pipe 25, and the inlet of the water jet propulsion device 22 is connected to the water intake pipe 20. Both the water intake pipe 20 and the return water pipe 25 extend below the water level in the pool 10, thereby enabling water to be drawn from and drained from the pool 10. The water jet propulsion device 22 is driven by the drive device 30, generating negative pressure to draw water into the water intake pipe 20, and then, after passing through the detection pipe 23, it is returned to the pool 10 through the return water pipe 25. The detection pipe 23 is equipped with detection instruments that can detect various parameters of the water flow (such as flow rate, pressure, etc.).

[0024] The drive device 30 includes a motor 31, a reducer 32, a dynamometer 33, and a universal joint 34. The motor drives the water jet propulsion device through the reducer and the universal joint.

[0025] The detection pipeline 23 includes: a nozzle straight pipe 231, a diffuser pipe 232, a transition straight pipe 233, a corrugated expansion joint 234, a first straight pipe 235, an electromagnetic flowmeter 236, a second straight pipe 237, a butterfly valve 238, and a third straight pipe 239.

[0026] The inlet diameter of the diffuser tube 232 is 0.5-0.6 times the outlet diameter.

[0027] A corrugated expansion joint 234 is installed between the transition straight pipe 233 and the first straight pipe 235 to avoid obstructing the water flow. The corrugated expansion joint 234 can extend and shorten to adapt to changes in outlet water pressure caused by different power inputs.

[0028] A butterfly valve 238 is provided between the second straight pipe 237 and the third straight pipe 239 to control the flow rate and cross-section within the second straight pipe 237.

[0029] The reducer is also equipped with a torque and speed sensor on its output shaft to detect the torque and speed of the output shaft.

[0030] This utility model provides a hydraulic performance test bench for a waterjet propulsion device, which can simulate the application scenario of a waterjet propulsion device being installed on a ship and moored. It is used to detect the hydraulic performance parameters, bearing temperature rise, and vibration of the waterjet propulsion pump at different speeds. The water in the pool can be recycled.

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A test bench for the hydraulic performance of a waterjet propulsion device, comprising a water tank, a deck, a waterjet propulsion device, a testing pipeline, a water intake pipe, a water return pipe, and a drive device, characterized in that, The water tank is rectangular and filled with water. The deck is fixedly connected to the water tank. The deck has a water intake opening at the position of the water intake pipe and a return opening at the position of the return pipe. The water jet propulsion device, the detection pipeline, and the drive device are installed on the deck. The water jet propulsion device is driven by the drive device and is connected to the detection pipeline. The outlet of the detection pipeline is connected to the return pipe, and the inlet of the water jet propulsion device is connected to the water intake pipe.

2. The hydraulic performance test bench apparatus for water jet propulsion device according to claim 1, characterized in that, The drive unit includes a motor, a reducer, a dynamometer, and a universal joint. The motor drives the water jet propulsion device through the reducer, dynamometer, and universal joint.

3. The hydraulic performance test bench apparatus for water jet propulsion device according to claim 1, characterized in that, The detection pipeline includes a nozzle straight pipe, a diffuser pipe, a transition straight pipe, a first straight pipe, a second straight pipe, and a third straight pipe. The inlet of the diffuser pipe is connected to the outlet of the water jet propulsion device through the nozzle straight pipe. The diffuser pipe is a tapered pipe with a flared end. The outlet of the diffuser pipe is connected to the transition straight pipe. The transition straight pipe is connected to the first straight pipe, and a corrugated expansion joint is installed between them. An electromagnetic flow meter is installed between the first straight pipe and the second straight pipe.

4. The hydraulic performance test bench apparatus for water jet propulsion device according to claim 3, characterized in that, The inlet diameter of the diffuser is 0.5 to 0.6 times the outlet diameter, and the length is 5 to 6 times the inlet diameter; the first straight pipe, the second straight pipe, and the third straight pipe have the same diameter.

5. The hydraulic performance test bench apparatus for water jet propulsion device according to claim 3, characterized in that, A corrugated expansion joint is installed between the transition straight pipe and the first straight pipe; the minimum diameter of the corrugated expansion joint is equal to the diameter of the first straight pipe.

6. The test apparatus for the hydraulic performance of a waterjet propulsion device according to claim 3, characterized in that, A butterfly valve is also installed between the second and third straight pipes to control the flow cross-section and flow rate within the pipe.

7. The test apparatus for the hydraulic performance of a waterjet propulsion device according to claim 2, characterized in that, The reducer is also equipped with a torque and speed sensor on its output shaft to detect the torque and speed of the output shaft.

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