A high pressure flow distribution disc cavitation visualization test device

Abstract

The application discloses a high-pressure flow distribution disc cavitation visualization test device, which comprises an upper cover, a transparent mechanism abutting against the center of the bottom of the upper cover, and a base detachably connected to the bottom of the upper cover, wherein a sink is formed in the center of the base, and the transparent mechanism is located in the sink. The application can observe the cavitation phenomenon by observing the transparent mechanism in the sink and can carry out the visualization test under a higher load pressure, so that the cavitation phenomenon under different load pressures can be explored, and the efficiency and service life of the axial plunger pump can be improved.

Description

Technical Field

[0001] This invention relates to the field of plunger pump testing technology, and in particular to a high-pressure distribution plate cavitation visualization test device. Background Technology

[0002] The slipper pair, plunger pair, and distribution pair are the three most important friction pairs in an axial piston pump. For the distribution pair, when the fluid in the plunger cavity passes through the throttling groove of the distribution plate, the fluid velocity increases dramatically. According to the principle of energy conservation, the fluid pressure will decrease. When the fluid pressure drops to its saturated vapor pressure, cavitation occurs. Cavitation leads to vibration, noise, and other issues, thus affecting the efficiency and lifespan of the axial piston pump. Therefore, research on distribution plate cavitation is of great significance. Currently, cavitation tests on axial piston pump distribution plates mostly involve monitoring pump outlet pressure or flow pulsation to determine cavitation phenomena. Research on cavitation visualization is limited. The paper "Visual Analysis of Cavitation Flow Inside an Axial Piston Pump" visualized the entire pump, using acrylic sheets for the pump casing and rear cover, and transparent resin material for the distribution plate. However, using transparent materials can cause leakage and insufficient pressure resistance; therefore, only tests at 3MPa and 5MPa were conducted. Summary of the Invention

[0003] The purpose of this invention is to provide a high-pressure distribution plate cavitation visualization test device to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a high-pressure distribution plate cavitation visualization test device, including an upper cover, a transparent mechanism abutting the bottom center of the upper cover, a base detachably connected to the bottom of the upper cover, a groove being formed in the center of the base, and the transparent mechanism being located in the groove.

[0005] Preferably, a square groove is formed at the center of the top surface of the transparent mechanism, and a throttling groove is formed on one side of the square groove. The throttling groove and the square groove respectively abut against the upper cover.

[0006] Preferably, the transparent mechanism is made of sapphire, acrylic, or transparent resin material.

[0007] Preferably, the top surface of the upper cover has a plurality of through holes circumferentially formed, and the plurality of through holes are detachably connected to the base. An oil outlet is formed on one side of the center of the upper cover, and the oil outlet abuts against the throttling groove. An oil inlet is formed on the other side of the center of the upper cover, and the oil inlet is connected to the oil supply pump.

[0008] Preferably, a boss is fixed to the center of the bottom surface of the upper cover, and a sealing ring groove is circumferentially formed on the bottom surface of the boss. The sealing ring groove is adapted to the square groove. A waist-shaped hole is formed on one side of the bottom surface of the boss. The waist-shaped hole is located inside the sealing ring groove and abuts against the throttling groove.

[0009] Preferably, the top cover is made of alloy steel such as 45 steel.

[0010] Preferably, the top surface of the base is provided with a plurality of threaded holes in the circumferential direction, and the threaded holes are detachably connected to the through holes by bolts.

[0011] Preferably, a first observation hole is provided at the bottom of the base, the first observation hole is located at the bottom of the sink and is directly opposite the position of the throttling groove, and a second observation hole is provided on the side wall of the base, the second observation hole is directly opposite the position of the throttling groove.

[0012] Preferably, the base is made of alloy steel such as 45 steel.

[0013] The present invention discloses the following technical effects: the upper cover and the base of the present invention are detachably connected, which facilitates adjustment during the test. The transparent mechanism is located between the upper cover and the base. A sink is provided in the center of the base. By observing the transparent mechanism in the sink, the cavitation phenomenon can be observed, thereby completing the visualization test. This allows for the investigation of the cavitation phenomenon under different load pressures, thereby improving the efficiency and life of the axial piston pump. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the upper surface of the cover of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the lower surface of the upper cover of the present invention;

[0018] Figure 4 This is a schematic diagram of the transparent mechanism of the present invention;

[0019] Figure 5 This is a schematic diagram of the mechanism of the base of the present invention;

[0020] Figure 6This is a cross-sectional view of the cover of the present invention;

[0021] Figure 7 This is a cross-sectional view of the base of the present invention;

[0022] Figure 8 This is a cross-sectional view of the present invention;

[0023] Among them, 1. Top cover; 11. Through hole; 12. Oil outlet; 13. Oil inlet; 14. Waist-shaped hole; 15. Boss; 16. Sealing ring groove; 2. Transparent mechanism; 21. Throttling groove; 22. Square groove; 3. Base; 31. Threaded hole; 32. Countersunk groove; 33. First observation hole; 34. Second observation hole. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Reference Figure 1-8 The present invention provides a high-pressure distribution plate cavitation visualization test device, including an upper cover 1, a transparent mechanism 2 abutting the bottom center of the upper cover 1, a base 3 detachably connected to the bottom of the upper cover 1, a sink 32 opened in the center of the base 3, and the transparent mechanism 2 located in the sink 32.

[0027] The upper cover 1 and the base 3 of this invention are detachably connected, which facilitates adjustment during the test. The transparent mechanism 2 is located between the upper cover 1 and the base 3. The base 3 has a sink 32 in the center. By observing the transparent mechanism 2 in the sink 32, the cavitation phenomenon can be observed, thereby completing the visualization test. This allows for the investigation of the cavitation phenomenon under different load pressures, thereby improving the efficiency and life of the axial piston pump.

[0028] To further optimize the design, a square groove 22 is formed at the center of the top surface of the transparent mechanism 2, and a throttling groove 21 is formed on one side of the square groove 22. The throttling groove 21 and the square groove 22 respectively abut against the upper cover 1. Cavitation occurs at the throttling groove 21. By observing the cavitation phenomenon of the throttling groove 21, the structure of the throttling groove 21 can be optimized to improve the cavitation phenomenon.

[0029] Further optimization of the design: the transparent mechanism 2 is made of sapphire, acrylic, or transparent resin. The transparent mechanism 2, made of transparent material, facilitates observation of the throttling groove 21.

[0030] Further optimization of the design: The top surface of the upper cover 1 has several through holes 11 circumferentially oriented, which are detachably connected to the base 3. An oil outlet 12 is located on one side of the center of the upper cover 1, abutting against the throttling groove 21. An oil inlet 13 is located on the other side of the center of the upper cover 1, connected to the oil supply pump. Both the oil inlet 13 and the oil outlet 12 are standard hydraulic threaded holes; the oil inlet 13 is M27×1.5, and the oil outlet 12 is M30×1.5. If the pipe fittings do not interfere with the installation, the hole diameter can be changed according to actual conditions. The oil inlet 13 is connected to the oil supply pump, and the oil outlet 12 is connected to the oil tank. An overflow valve (not shown in the figure) is installed between the oil outlet 12 and the oil tank to change the oil pressure. The upper part of the oil inlet 13 is a cylindrical hole, and the lower part is an oblong hole, to simulate the shape of a plunger cavity.

[0031] Further optimization of the design: A boss 15 is fixedly connected to the center of the bottom surface of the top cover 1. A sealing ring groove 16 is circumferentially formed on the bottom surface of the boss 15, which is compatible with the square groove 22. A waist-shaped hole 14 is formed on one side of the bottom surface of the boss 15, located inside the sealing ring groove 16, and abuts against the throttling groove 21. The hydraulic oil flow process is as follows: the oil supply pump presses the hydraulic oil into the oil inlet 13, then flows into the throttling groove 21 through the waist-shaped hole 14, flows from the throttling groove 21 into the square groove 22, and finally flows out from the oil outlet 12; the sealing ring groove 16 can be fitted with an O-ring or a rectangular sealing ring to ensure its airtightness; the boss 15 is used to press down the transparent mechanism 2 in the middle.

[0032] The design was further optimized, and the top cover 1 was made of alloy steel such as 45 steel.

[0033] In a further optimized design, the top surface of the base 3 is provided with several threaded holes 31 circumferentially. The threaded holes 31 are detachably connected to the through holes 11 by bolts. The bolts connect the upper cover 1 and the base 3 through the through holes 11 of the upper cover 1 and the threaded holes 31 of the base 3. The bolts can be selected as internal hexagonal or external hexagonal bolts.

[0034] Further optimizing the design, a first observation hole 33 is provided at the bottom of the base 3, located at the bottom of the sink 32, directly opposite the throttling groove 21. A second observation hole 34 is provided on the side wall of the base 3, also directly opposite the throttling groove 21. Both the first and second observation holes 33 and 34 are for observing the cavitation phenomenon of the throttling groove 21, providing a more detailed view of the cavitation phenomenon from different directions. The length of the sink 32 is greater than the length of the intermediate transparent mechanism 2, allowing the intermediate transparent mechanism 2 to move within the sink 32 to change the contact length between the waist-shaped hole 14 and the throttling groove 21.

[0035] The design was further optimized, and the base 3 was made of alloy steel such as 45 steel.

[0036] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0037] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A high pressure distribution plate cavitation visualization test device, characterized by: Including the upper cover (1), the bottom center of the upper cover (1) is abutted with a transparent mechanism (2), and the bottom of the upper cover (1) is detachably connected with a base (3), and the center of the base (3) is provided with a sunken groove (32), and the transparent mechanism (2) is located in the sunken groove (32); The top surface of the transparent mechanism (2) is provided with a square groove (22) in the center, and the square groove (22) is provided with a throttling groove (21) on one side, and the throttling groove (21) and the square groove (22) are respectively abutted with the upper cover (1); The transparent mechanism (2) is made of sapphire, acrylic or transparent resin material; The top surface of the upper cover (1) is provided with a plurality of through holes (11) circumferentially, and a plurality of through holes (11) are detachably connected with the base (3), and the center of the upper cover (1) is provided with an oil outlet (12) on one side, and the oil outlet (12) is abutted with the throttling groove (21), and the center of the upper cover (1) is provided with an oil inlet (13) on the other side, and the oil inlet (13) is communicated with the oil supply pump; The bottom surface of the upper cover (1) is fixedly connected with a boss (15) in the center, and the bottom surface of the boss (15) is provided with a sealing ring groove (16) circumferentially, and the sealing ring groove (16) is matched with the square groove (22), and the bottom surface of the boss (15) is provided with a waist hole (14) on one side, and the waist hole (14) is located on the inner side of the sealing ring groove (16), and the waist hole (14) is abutted with the throttling groove (21); The bottom of the base (3) is provided with a first observation hole (33), and the first observation hole (33) is located at the bottom of the sunken groove (32), and the first observation hole (33) is opposite to the position of the throttling groove (21), and the sidewall of the base (3) is provided with a second observation hole (34), and the second observation hole (34) is opposite to the position of the throttling groove (21).

2. The high-pressure distribution disc cavitation visualization test device according to claim 1, characterized in that: The upper cover (1) is made of alloy steel such as 45 steel.

3. The high-pressure distribution disc cavitation visualization test device according to claim 2, characterized in that: The top surface of the base (3) is provided with a plurality of threaded holes (31) circumferentially, and the threaded holes (31) are detachably connected with the through holes (11) through bolts.

4. The high-pressure distribution disc cavitation visualization test device according to claim 1, characterized in that: The base (3) is made of alloy steel such as 45 steel. The base (3) is made of alloy steel such as 45 steel.

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