Device and method for testing the vaporization rate of water under different pressure and temperature environments

Abstract

A device and method for testing the vaporization rate of water under different pressure and temperature environments includes a water-receiving groove on the upper surface of the base, an oil-collecting ring groove and a sealing groove disposed on the outer surface in sequence, and an outlet disposed on the base outside the water-receiving groove. A mounting seat is located in the middle of the base, with mounting holes disposed at each of the four corners. A frame is mounted in each of the mounting holes, and guide wheels and pulleys are spaced apart at intervals on the upper portion of the frame. A vaporization chamber is sealed within the sealing groove via a sealing gasket. A piston is mounted within the vaporization chamber, connected to a steel wire rope that passes through an end cap, around the guide wheel and pulley, and then to a counterweight. A laser rangefinder is mounted on the base directly below the counterweight. A display terminal is mounted on the frame, and a temperature-controlled fan is also mounted on the base. This device can be used to study the vaporization rate of water under different pressure and temperature environments, providing basic data support for the study of cavitation effects.

Description

Technical Field

[0001] The present invention relates to the technical field of testing devices, and in particular to a device and method for testing the vaporization rate of water under different pressure and temperature environments. Background Art

[0002] During the high-speed rotation of the propeller, a low-pressure area will appear on the surface of the blade. The water boils in the low-pressure area and vaporizes rapidly, which is commonly known as the cavitation effect. It will damage the blade and reduce the propeller's power performance.

[0003] To study the cavitation effect of propellers, numerical simulation software is usually used for virtual calculations and cavitation water tanks are used for experimental research. The water vaporization characteristic parameters are crucial to the accuracy of cavitation effect research. Currently, there is no device specifically used for studying water vaporization characteristics in normal temperature and low-pressure environments. Summary of the Invention

[0004] In response to the shortcomings of the above-mentioned existing production technology, the applicant provides a testing device and method for the vaporization rate of water under different pressure and temperature environments, which can be used to study the vaporization rate of water under different pressure and temperature environments, obtain the vaporization parameters of water under different pressure and temperature environments, and provide basic data support for the study of cavitation effect.

[0005] The technical solutions adopted in the present invention are as follows:

[0006] A device for testing the vaporization rate of water under different pressure and temperature environments includes a base. The base has a structure as follows: a water-receiving groove is provided on the upper surface of the base, an oil-collecting ring groove is provided outside the water-receiving groove, a sealing groove is provided outside the oil-collecting ring groove, an outlet is also provided on the base outside the water-receiving groove, a mounting seat is provided in the middle of the base, and mounting holes are provided at the four corners of the base;

[0007] A frame is installed in the installation hole, and guide wheels and pulleys are spaced apart on the upper part of the frame;

[0008] A vaporization chamber is installed in the sealing groove through a sealing gasket, and an end cover is installed on the top surface of the vaporization chamber. A small circular hole is opened in the center of the end cover. A piston is installed in the vaporization chamber. The piston is connected to a wire rope. The wire rope passes through the small circular hole of the end cover, passes around the guide wheel and the pulley, and is then connected to the counterweight.

[0009] A laser rangefinder is mounted on the base directly below the counterweight;

[0010] A display terminal is installed on the frame;

[0011] It also includes a temperature-controlled fan fixed to the base;

[0012] A pressure regulating pipeline connected to the outside is installed at the outlet, a vacuum pump is installed on the pressure regulating pipeline through a branch pipeline, a No. 1 stop valve is installed on the branch pipeline, and a No. 2 stop valve is installed on the pressure regulating pipeline.

[0013] As a further improvement of the above technical solution:

[0014] The base is a rectangular parallelepiped structure.

[0015] The vaporization chamber is in a cylindrical structure.

[0016] The center of the piston is aligned with the center of the small circular hole of the end cover.

[0017] The laser rangefinder is fixed on the mounting base and measures the downward displacement of the counterweight in real time. The displacement and time data are transmitted to the display terminal for display and storage.

[0018] Lubricating oil is injected into the upper surface of the piston to lubricate the inner wall of the vaporization chamber.

[0019] A method for testing the vaporization rate of water under different pressure and temperature environments includes the following steps:

[0020] S1: Preparation:

[0021] Lift the vaporization chamber vertically to the base and out of the sealing groove, then adjust the weight of the counterweight until the piston slides at a constant speed in the vaporization chamber. At this point, the weight of the counterweight can just overcome the friction of the system.

[0022] S2: Computational work:

[0023] Calculate the final weight of the required counterweight based on the required negative pressure and the internal cross-sectional area of ​​the vaporization chamber. Adjust the counterweight to the final weight, with the piston at the bottom of the vacuum chamber and the counterweight at the highest position.

[0024] S3: Add water:

[0025] Put the required amount of water for the test into the water-containing groove and install the vaporization chamber on the sealing gasket in the sealing groove;

[0026] S4: Start the experiment:

[0027] Turn on the temperature-controlled fan, adjust it to the temperature required for the test, and keep blowing air toward the outer surface of the vaporizer chamber;

[0028] Turn on the laser rangefinder and display terminal to start measuring the position of the counterweight. Then gently release the counterweight, pulling the piston upward to form a low-pressure cavity inside the vaporization chamber, and the water in the water groove begins to vaporize.

[0029] As the water vaporizes, the gas in the vaporization chamber increases, and the pressure difference between the upper and lower surfaces of the piston changes. The counterweight will continue to pull the piston upward, thereby maintaining a constant pressure in the vaporization chamber until the water in the water groove is completely vaporized.

[0030] S5: End of the experiment:

[0031] After the test, slowly open the No. 2 stop valve to gradually restore the pressure in the vaporization chamber to normal pressure, and the counterweight block drops to the lowest position;

[0032] Remove the counterweight, close the No. 2 stop valve, open the No. 1 stop valve, start the vacuum pump, create negative pressure in the vaporization chamber, and move the piston downward to the bottom to achieve the reset purpose.

[0033] The beneficial effects of the present invention are as follows:

[0034] The present invention has a compact and reasonable structure and is easy to operate. Through the mutual cooperation between the base, vaporization chamber, frame, laser rangefinder and other components, the counterweight block pulls the piston to slide upward through the wire rope, so that a low-pressure environment is generated under the piston. Water vaporizes rapidly in the low-pressure environment. Changing the weight of the counterweight block can create different pressure environments under the piston; a temperature-controlled fan blows wind of a specific temperature to the outer surface of the vaporization chamber to create a constant temperature environment, so that the vaporization rate of water under different pressure and temperature environments can be studied.

[0035] The present invention can be used to study the vaporization rate of water under different pressure and temperature environments, obtain the vaporization parameters of water under different pressure and temperature environments, and provide basic data support for the study of cavitation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the present invention.

[0037] Figure 2 It is a top view of the present invention.

[0038] Figure 3 for Figure 2 Full cross-sectional view along section AA.

[0039] Figure 4 It is a structural schematic diagram of the base of the present invention.

[0040] Among them: 1. Laser rangefinder; 2. Display terminal; 3. Frame; 4. Counterweight; 5. Pulley; 6. Guide wheel; 7. Wire rope; 8. End cover; 9. Vaporization chamber; 10. Piston; 11. Sealing gasket; 12. Base; 13. Temperature-controlled fan; 14. Water storage groove; 15. Oil collecting ring groove; 16. Pressure regulating pipeline; 17. Vacuum pump; 18. No. 1 stop valve; 19. No. 2 stop valve; 20. Sealing groove; 21. Installation hole; 22. Mounting seat; 23. Outlet. DETAILED DESCRIPTION

[0041] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0042] like Figures 1-4 As shown, the test device for the vaporization rate of water under different pressure and temperature environments of this embodiment includes a base 12. The structure of the base 12 is as follows: a water storage groove 14 is provided on the upper surface of the base 12, an oil collecting ring groove 15 is provided outside the water storage groove 14, a sealing groove 20 is provided outside the oil collecting ring groove 15, an outlet 23 is further provided on the base 12 outside the water storage groove 14, a mounting seat 22 is provided in the middle of the base 12, and mounting holes 21 are provided at the four corners of the base 12;

[0043] The mounting hole 21 is matched with a frame 3, and guide wheels 6 and pulleys 5 are spaced apart on the upper portion of the frame 3;

[0044] A vaporization chamber 9 is sealed and installed in the sealing groove 20 through a sealing gasket 11. An end cover 8 is installed on the top surface of the vaporization chamber 9. A small circular hole is opened in the center of the end cover 8. A piston 10 is installed inside the vaporization chamber 9. The piston 10 is connected to the wire rope 7. The wire rope 7 passes through the small circular hole of the end cover 8, passes around the guide wheel 6 and the pulley 5, and is then connected to the counterweight 4.

[0045] A laser rangefinder 1 is mounted on the base 12 located just below the counterweight 4;

[0046] The display terminal 2 is mounted on the frame 3;

[0047] It also includes a temperature-controlled fan 13 fixed on the base 12;

[0048] A pressure regulating pipeline 16 connected to the outside is installed at the outlet 23 , a vacuum pump 17 is installed on the pressure regulating pipeline 16 through a branch pipeline, a No. 1 stop valve 18 is installed on the branch pipeline, and a No. 2 stop valve 19 is installed on the pressure regulating pipeline 16 .

[0049] The base 12 is a rectangular parallelepiped structure.

[0050] The vaporization chamber 9 has a cylindrical structure.

[0051] The center of the piston 10 is aligned with the center of the small circular hole of the end cover 8.

[0052] The laser rangefinder 1 is fixed on the mounting base 22 and measures the downward displacement of the counterweight 4 in real time. The displacement and time data are transmitted to the display terminal 2 for display and storage.

[0053] Lubricating oil is injected into the upper surface of the piston 10 to lubricate the inner wall of the vaporization chamber 9.

[0054] The method for testing the vaporization rate of water under different pressure and temperature environments of this embodiment includes the following steps:

[0055] S1: Preparation:

[0056] Lift the vaporization chamber 9 vertically to the base 12 and out of the sealing groove 20. Then adjust the weight of the counterweight 4 until the piston 10 slides at a constant speed in the vaporization chamber 9. At this time, the gravity of the counterweight 4 can just overcome the friction of the system.

[0057] S2: Computational work:

[0058] According to the negative pressure required for the test, the final weight of the required counterweight is calculated in combination with the internal cross-sectional area of ​​the vaporization chamber 9. The counterweight 4 is adjusted to the final weight, with the piston 10 at the bottom of the vacuum chamber and the counterweight 4 at the highest position.

[0059] S3: Add water:

[0060] Put the required amount of water for the test into the water holding groove 14 and install the vaporization chamber 9 on the sealing gasket 11 in the sealing groove 20;

[0061] S4: Start the experiment:

[0062] Turn on the temperature-controlled fan 13, adjust it to the temperature required for the test, and keep blowing air toward the outer surface of the vaporization chamber 9;

[0063] Turn on the laser rangefinder 1 and the display terminal 2, start measuring the position of the counterweight 4, then gently release the counterweight 4, pulling the piston 10 upward, forming a low-pressure cavity inside the vaporization chamber 9, and the water in the water groove 14 begins to vaporize;

[0064] As the water vaporizes, the gas in the vaporization chamber 9 increases, and the pressure difference between the upper and lower surfaces of the piston 10 changes. The counterweight 4 will continue to pull the piston 10 upward, thereby maintaining a constant pressure in the vaporization chamber 9 until the water in the water-containing groove 14 is completely vaporized.

[0065] S5: End of the experiment:

[0066] After the test is completed, slowly open the second stop valve 19 to gradually restore the pressure in the vaporization chamber 9 to normal pressure, and the counterweight 4 drops to the lowest position;

[0067] Remove the counterweight 4, close the No. 2 stop valve 19, open the No. 1 stop valve 18, start the vacuum pump 17, generate negative pressure in the vaporization chamber 9, and move the piston 10 downward to the bottom to achieve the reset purpose.

[0068] The specific structure and function of the device for testing the vaporization rate of water under different pressure and temperature environments of the present invention are as follows:

[0069] It mainly includes a base 12, a sealing gasket 11, a piston 10, a vaporization chamber 9, an end cover 8, a laser rangefinder 1, a display terminal 2, a frame 3, a counterweight 4, a temperature-controlled fan 13, a pressure regulating pipeline 16, a stop valve, a vacuum pump 17, a pulley 5 and a wire rope 7, etc.

[0070] The base 12 is provided with a water collecting groove 14 , an oil collecting ring groove 15 , a sealing groove 20 , a mounting seat 22 , an outlet 23 and a mounting hole 21 , and the sealing gasket 11 is placed in the sealing groove 20 .

[0071] The vaporization chamber 9 is a cylindrical structure, the lower end of which is mounted on the upper surface of the sealing gasket 11 and forms an initial seal by its own weight.

[0072] The end cover 8 is installed at the upper end of the vaporization chamber 9. There is a small round hole in the center of the end cover 8, which is aligned with the center of the piston 10; one end of the wire rope 7 is connected to the center of the piston 10, passes through the center of the end cover 8, bypasses the guide wheel 6 and the pulley 5, and the other end is connected to the counterweight 4. During installation, you only need to ensure that the wire rope 7 passes through the center of the end cover 8 to ensure that the wire rope 7 is perpendicular to the piston 10.

[0073] A laser rangefinder 1 is installed directly below the counterweight 4 to measure the downward displacement of the counterweight 4 in real time. The displacement and time data are transmitted to the display terminal 2 for display and storage, and then the water vaporization rate in the water tank 14 can be converted.

[0074] An appropriate amount of lubricating oil is injected into the upper surface of the piston 10 to lubricate the inner wall of the vaporization chamber 9 and reduce the friction between the piston 10 and the inner wall of the vaporization chamber 9; to prevent the lubricating oil from entering the water holding groove 14 and interfering with the test, an oil collecting ring groove 15 is set on the periphery of the water holding groove 14.

[0075] During operation of the device, the temperature-controlled fan 13 continuously blows air of a specific temperature toward the outer surface of the vaporization chamber 9 to create a specific constant temperature environment.

[0076] A pressure regulating pipeline 16, a No. 1 stop valve 18, a No. 2 stop valve 19 and a vacuum pump 17 are installed outside the outlet 23 of the base 12. The conditional stop valve and the vacuum pump 17 are used to reset the device after the test.

[0077] In actual work process:

[0078] Lift the vaporization chamber 9 vertically to the base 12 and out of the sealing groove 20, and adjust the weight of the counterweight 4 until the piston 10 slides at a uniform speed in the vaporization chamber 9. At this time, the gravity of the counterweight 4 can just overcome the friction of the system.

[0079] According to the negative pressure required for the test, the final weight of the counterweight required is calculated in combination with the internal cross-sectional area of ​​the vaporization chamber 9, and the counterweight block 4 is adjusted to the final weight, with the piston 10 at the bottom of the vacuum chamber and the counterweight block 4 at the highest position.

[0080] The amount of water required for the test is placed in the water holding groove 14 , and the vaporization chamber 9 is installed on the sealing gasket 11 in the sealing groove 20 .

[0081] Turn on the temperature-controlled fan 13, adjust it to the temperature required for the test, and keep blowing air toward the outer surface of the vaporization chamber 9.

[0082] Turn on the laser rangefinder 1 and the display terminal 2, start measuring the position of the counterweight 4, then gently release the counterweight 4, allowing it to pull the piston 10 upward, forming a low-pressure cavity inside the vaporization chamber 9, and the water in the water groove 14 begins to vaporize.

[0083] As the water vaporizes, the gas in the vaporization chamber 9 increases, and the pressure difference between the upper and lower surfaces of the piston 10 will change, and the counterweight 4 will continue to pull the piston 10 upward, thereby keeping the pressure in the vaporization chamber 9 constant until the water in the water holding groove 14 is completely vaporized.

[0084] After the test is completed, the No. 2 stop valve 19 is slowly opened to gradually restore the pressure in the vaporization chamber 9 to normal pressure, and the counterweight 4 drops to the lowest position.

[0085] Remove the counterweight 4, close the No. 2 stop valve 19, open the No. 1 stop valve 18, start the vacuum pump 17, generate negative pressure in the vaporization chamber 9, and move the piston 10 downward to the bottom to achieve the reset purpose.

[0086] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any modifications may be made within the scope of protection of the present invention.

Claims

1. A device for testing the vaporization rate of water under different pressure and temperature environments, characterized by: The invention comprises a base (12), wherein the base (12) has the following structure: a water-collecting groove (14) is provided on the upper surface of the base (12), an oil-collecting ring groove (15) is provided outside the water-collecting groove (14), a sealing groove (20) is provided outside the oil-collecting ring groove (15), an outlet (23) is further provided on the base (12) outside the water-collecting groove (14), a mounting seat (22) is provided in the middle of the base (12), and mounting holes (21) are respectively provided at the four corners of the base (12); A frame (3) is mounted in cooperation with the mounting hole (21), and guide wheels (6) and pulleys (5) are spaced apart on the upper portion of the frame (3); A vaporization chamber (9) is installed in a sealed manner in the sealing groove (20) through a sealing gasket (11), an end cover (8) is installed on the top surface of the vaporization chamber (9), a small circular hole is opened in the center of the end cover (8), a piston (10) is installed in the vaporization chamber (9), and the piston (10) is connected to a steel wire rope (7), and the steel wire rope (7) passes through the small circular hole of the end cover (8) and then passes around the guide wheel (6) and the pulley (5), and then is connected to the counterweight (4); A laser rangefinder (1) is mounted on the base (12) located directly below the counterweight (4); A display terminal (2) is mounted on the frame (3); Also included is a temperature-controlled fan (13) fixed on the base (12); A pressure regulating pipeline (16) connected to the outside is installed at the outlet (23), a vacuum pump (17) is installed on the pressure regulating pipeline (16) through a branch pipeline, a No. 1 stop valve (18) is installed on the branch pipeline, and a No. 2 stop valve (19) is installed on the pressure regulating pipeline (16); The laser rangefinder (1) is fixed on the mounting seat (22) and measures the downward displacement of the counterweight (4) in real time. The displacement and time data are transmitted to the display terminal (2) for display and storage.

2. The device for testing the vaporization rate of water under different pressure and temperature environments according to claim 1, characterized in that: The base (12) is a rectangular parallelepiped structure.

3. The device for testing the vaporization rate of water under different pressure and temperature environments according to claim 1, characterized in that: The vaporization chamber (9) has a cylindrical structure.

4. The device for testing the vaporization rate of water under different pressure and temperature environments according to claim 1, characterized in that: The center of the piston (10) is aligned with the center of the small circular hole of the end cover (8).

5. The device for testing the vaporization rate of water under different pressure and temperature environments according to claim 1, characterized in that: Lubricating oil is injected into the upper surface of the piston (10) to lubricate the inner wall of the vaporization chamber (9).

6. A method for testing the device for testing the vaporization rate of water under different pressure and temperature environments as claimed in claim 1, characterized in that: The steps are as follows: S1: Preparation: Lift the vaporization chamber (9) vertically to the base (12) and out of the sealing groove (20), then adjust the weight of the counterweight (4) until the piston (10) slides at a uniform speed in the vaporization chamber (9), and the weight of the counterweight (4) can just overcome the friction of the system; S2: Computational work: According to the negative pressure required for the test, the final weight of the counterweight required is calculated in combination with the internal cross-sectional area of ​​the vaporization chamber (9), and the counterweight (4) is adjusted to the final weight, with the piston (10) at the bottom of the vacuum chamber and the counterweight (4) at the highest position; S3: Add water: Put the amount of water required for the test into the water holding groove (14), and install the vaporization chamber (9) on the sealing gasket (11) in the sealing groove (20); S4: Start the experiment: Turn on the temperature control fan (13), adjust it to the temperature required for the test, and keep blowing air toward the outer surface of the vaporization chamber (9); Turn on the laser rangefinder (1) and the display terminal (2), start measuring the position of the counterweight (4), then gently release the counterweight (4), pull the piston (10) upward, form a low-pressure cavity inside the vaporization chamber (9), and the water in the water groove (14) begins to vaporize; As the water vaporizes, the gas in the vaporization chamber (9) increases, and the pressure difference between the upper and lower surfaces of the piston (10) changes, while the counterweight (4) continues to pull the piston (10) upward, thereby maintaining the pressure in the vaporization chamber (9) constant until the water in the water-containing groove (14) is completely vaporized; S5: End of the experiment: After the test is completed, slowly open the No. 2 stop valve (19) to gradually restore the pressure in the vaporization chamber (9) to normal pressure, and the counterweight (4) drops to the lowest position; Remove the counterweight (4), close the No. 2 stop valve (19), open the No. 1 stop valve (18), start the vacuum pump (17), so that negative pressure is generated in the vaporization chamber (9), and the piston (10) moves downward to the bottom, thereby achieving the purpose of resetting.

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