A visual comprehensive test device for a water tank cleaning machine

Abstract

The present invention discloses a comprehensive visualization test device for a water tank cleaning machine, including a water storage device, a motor, a main shaft, an impeller, a flow guide device, a volute, connecting bolts, a bend pipe, a baffle, and a PIV measurement system. The impeller is located inside the volute and the flow guide ring. The impeller is fixed to the main shaft by bolts and rotates with the main shaft. The motor is connected to the test section of the water storage device. The top of the water storage tank is open. The outlet section of the volute is connected to the outlet pipe of the water storage device by connecting bolts. The impeller, the volute, the flow guide device, the water storage device, and the baffle are made of transparent materials to realize the visualization of the internal flow of each flow-passing component of the water tank cleaning machine. During the test, different impellers, flow guide rings, and volute models can be replaced to meet the measurement requirements of full immersion. The baffle is used to prevent the fluctuation of the liquid level, and the PIV measurement of the internal flow field of the cleaning machine is realized. At the same time, shooting at different angles can be realized, and the flow law of the flow field in the cleaning machine can be grasped more accurately, more flexibly, and more comprehensively.

Description

Technical Field

[0001] The invention belongs to the technical field of internal flow of fluid machinery, and in particular relates to a visual comprehensive test device for a water tank type cleaning machine. Background Art

[0002] As people's living standards continue to improve, washing machines, as a kitchen appliance, are increasingly entering households. At present, washing machines on the market are generally divided into three types: desktop, cabinet, and tank. Among them, the desktop washing machine is an integral independent structure, generally placed on the countertop for use, but the volume is small and can wash fewer dishes; the cabinet washing machine is also an independent structure with a large volume, but it needs to be embedded in the cabinet for use, and the user needs to bend over to open and close it, resulting in a poor user experience; the sink washing machine is combined with the sink, generally installed in the kitchen sink for use, combining the advantages of the desktop washing machine and the cabinet washing machine. Its top-opening opening and closing method caters to the user experience, and the larger cleaning volume also solves the disadvantage of the small volume of the desktop washing machine.

[0003] The various forms of cleaning machines mentioned above generally use a water pump to lift water and spray it onto the dishes in the cleaning space through a spray arm to achieve the cleaning effect. At present, the experimental research on the internal flow field of the water pump mainly uses methods such as particle image velocimetry (PIV) and laser Doppler velocimetry (LDV). Since PIV measurement is a non-contact multi-point measurement technology, it not only has the characteristics of not interfering with the flow field, but also the measurement accuracy is constantly improving with the advancement of instruments and data processing algorithms.

[0004] PIV technology has been widely used in the measurement of flow fields inside pumps, including the measurement methods of flow fields on the axial surface and inlet and outlet sections of centrifugal pumps, mixed flow pumps and axial flow pumps. However, the above test methods are not applicable to the measurement of flow fields inside water tank cleaning machine pumps. Due to the unique structure of water tank cleaning machines, the double-diaphragm structure of the pump cavity makes PIV measurement of the flow field inside the pump extremely difficult. Summary of the invention

[0005] The invention proposes a visualized comprehensive test platform for a water tank type cleaning machine, aiming to fill the blank of a visualized test measurement method for a water tank type cleaning machine.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A visual comprehensive test device structure for a water tank cleaning machine comprises a water storage device, a motor, a main shaft, an impeller, a flow guide device, a volute, connecting bolts, a bend pipe, a baffle, and a PIV measurement system.

[0008] The water storage device includes two parts, upstream and downstream, the upstream section is a water storage tank, and the downstream section is a test section, which are connected at the bottom; it also includes a measuring cylinder, two water outlet pipes, four positioning bases, a motor mounting seat and six motor positioning holes. The four volute positioning bases are distributed at the four corners of the volute, and a boss is provided on the top surface of each base, which is connected to the groove on the bottom surface of the diversion device positioning base through screws. The six motor positioning holes are evenly distributed at 60 degrees.

[0009] The guide device includes a guide ring, a fixing plate and a guide device fixing base, the guide ring is located in the middle of the fixing plate; the guide device fixing base is set at the four corners of the fixing plate, the top surface of the base is provided with a boss connected to the groove on the bottom surface of the volute fixing base through screws, and the bottom surface is provided with a groove connected to the boss on the top surface of the positioning base through screws.

[0010] The impeller is located inside the volute and the guide ring and is connected to the main shaft. The main shaft is connected to the motor. The motor is connected to the test section of the water storage device through a motor mounting seat and six motor positioning holes.

[0011] The guide ring and the interior of the volute smoothly transition to form a smooth whole, the bottom of the guide ring is connected to the test section of the water storage device, the test section of the water storage device is connected to the water storage tank of the water storage device, and the top of the water storage tank is open.

[0012] The volute is provided with two symmetrical outlet sections, the diameter of the volute inlet section is the same as the outer diameter of the guide ring, the outlet pipe is provided with a thread, and is connected to the inlet section of the water outlet pipe of the water storage device through a connecting bolt, and the outlet section of the water outlet pipe is connected to the inlet section of the bent pipe; the four corners of the volute are provided with a volute fixing base, and the base is provided with grooves and fixing holes, which are connected to the positioning base and the guide device through screws.

[0013] The impeller, volute, flow guide device, water storage device and baffle are made of transparent material, so as to realize visualization of the internal flow of each flow-through component of the water tank cleaning machine. The transparent material is organic glass.

[0014] A measuring cylinder is arranged on the side wall of the water storage tank of the water storage device, so that the water level can be observed in real time and tests under different water levels can be carried out.

[0015] A boss is provided on the top of the test section of the water storage device, which is connected to the baffle plate by screws, so as to prevent water surface fluctuations under immersion conditions; the baffle plate and the boss of the water storage device are equal in length and width.

[0016] The water outlet pipe is arranged on the wall surface of the test section, threads are arranged at both ends of the water outlet pipe, and the elbow is connected to the outlet section of the water outlet pipe.

[0017] The impeller, the flow guide device and the volute are detachably arranged.

[0018] The PIV measurement system includes a CCD camera, a sheet light source laser and a computer, wherein the CCD camera and the sheet light source laser are connected to the computer respectively. The sheet light source laser is used to emit laser light to expose the tracer particles in the flow field, and the CCD camera is used to photograph the flow state of the flow field.

[0019] The PIV test method for the internal flow field of a water tank cleaning machine of the present invention comprises a sheet light source laser that emits a laser sheet light source, which penetrates the baffle, volute and impeller from the top, and a CCD camera is arranged from the side of the test section, and the CCD camera is perpendicular to the sheet light source; the CCD camera obtains image information of the internal cross-sectional flow field of the water tank cleaning machine, and the computer performs cross-correlation processing on the image to obtain velocity field information, and obtains velocity vector diagrams and cloud diagrams through software processing. The beneficial effects of the present invention are:

[0020] Compared with the prior art, the visual comprehensive test platform for a water tank cleaning machine described in the present invention can adjust the water level according to the experimental requirements by setting a measuring cylinder and a baffle on the water storage device to prevent the water surface fluctuation in the test section. By setting a positioning device made of transparent organic glass on the volute, the guide device and the inlet, the impeller, volute and guide ring models can be replaced according to the test requirements, and the PIV measurement of the flow field inside the cleaning machine can be achieved. At the same time, shooting at different angles can be achieved, and the flow law of the flow field inside the cleaning machine can be grasped more accurately, flexibly and comprehensively. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram (A) and a front view (B) of the first embodiment of the present invention;

[0022] Figure 2 This is a schematic structural diagram of a water storage device according to Embodiment 1 of the present invention;

[0023] Figure 3 This is a schematic structural diagram of a flow guide device according to Embodiment 1 of the present invention;

[0024] Figure 4 Schematic diagram of the volute structure of the first embodiment of the present invention; a-front view of the volute, b-front view of the volute, c-sectional view AA, d-top view of the volute, e-sectional view BB;

[0025] Figure 5 This is a schematic diagram of the connecting bolt structure of the first embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the elbow structure of the first embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the baffle structure of Embodiment 1 of the present invention;

[0028] Figure 8Schematic diagram of a PIV measurement system according to Embodiment 1 of the present invention;

[0029] Description of reference numerals:

[0030] 1-water storage device; 1.1-measuring cylinder; 1.2-water storage tank; 1.3-test section; 1.4-boss; 1.5-inlet section of water outlet pipe; 1.6-outlet section of water outlet pipe; 1.7-positioning base; 1.8-motor mounting seat; 1.9-motor positioning hole; 2-motor; 3-spindle; 4-impeller; 5-flow guide device; 5.1-flow guide ring; 5.2-fixing plate; 5.3-flow guide device fixing base; 6-volute; 6.1-volute outlet section; 6.2-volute fixing base; 7-connecting bolt; 8-elbow; 8.1-elbow inlet section; 8.2-elbow outlet section; 9-baffle; 10-PIV system; 10.1-CCD camera; 10.2-sheet light source laser; 10.3-computer; 10.4-display screen. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 used to limit the present invention.

[0032] Embodiment 1

[0033] like Figure 1 As shown, a structure of a visual comprehensive test device for a water tank cleaning machine includes a water storage device 1, a motor 2, a main shaft 3, an impeller 4, a flow guide device 5, a volute 6, a connecting bolt 7, a bend 8, a baffle 9, and a PIV measurement system 10.

[0034] The water storage device 1 comprises two parts, an upstream part being a water storage tank 1.2 and a downstream part being a test section 1.3, which are connected at the bottom;

[0035] The flow guide device 5 comprises a flow guide ring 5.1, a fixing plate 5.2 and a flow guide device fixing base 5.3; the flow guide ring 5.1 is located in the middle of the fixing plate 5.2;

[0036] The impeller 4 is located inside the volute 6 and the guide ring 5.1, and the impeller 4 and the motor 2 are connected in series through the main shaft 3. The impeller 4 is fixed to the main shaft 3 by bolts and rotates with the main shaft 3.

[0037] like Figure 2 As shown, the motor 2 is connected to the water storage device test section 1.3 through the motor mounting seat 1.8 and six motor positioning holes 1.9.

[0038] The guide ring 5.1 smoothly transitions with the interior of the volute 6 to form a smooth whole. The bottom of the guide ring 5.1 of the guide device 5 is connected to the test section 1.3 of the water storage device, the test section 1.3 is connected to the water storage tank 1.2, and the top of the water storage tank 1.2 is open.

[0039] like Figure 3-Figure 6 As shown, the impeller 4 is located inside the volute 6 and the guide ring 5.1, a connecting bolt 7 is installed between the volute outlet section 6.1 and the water outlet pipe inlet section 1.5 of the water storage device, and the water outlet pipe outlet section 1.6 of the water storage device is connected to the elbow inlet section 8.1.

[0040] like Figure 4 As shown, the four corners of the volute 6 are provided with volute fixing bases 6.2, which are connected with the positioning base 1.7 and the guide device fixing base 5.3 by screws.

[0041] like Figure 7 As shown, the four corners of the baffle plate 9 are connected to the boss 1.4 of the water outlet device by screws.

[0042] The impeller 4, volute 6, guide device 5, water storage device 1, and baffle 9 are made of transparent materials to realize visualization of the internal flow of each flow-through component of the water tank cleaning machine.

[0043] like Figure 8 As shown, the PIV measurement system includes a CCD camera 10.1, a sheet light source laser 10.2 and a computer 10.3. The CCD camera 10.1 and the sheet light source laser 10.2 are respectively connected to the computer 10.3, the sheet light source laser 10.2 is used to emit laser light to expose the tracer particles in the flow field, and the CCD camera 10.1 is used to shoot the flow state of the flow field.

[0044] The measuring method of the device comprises the following steps:

[0045] Step 1: Press Figure 8 Connect all parts, place the sheet light source laser 10.2 just above the baffle 9, and place the lens of the CCD camera 10.1 perpendicular to the laser surface and facing the flow field area of ​​the impeller outlet axial section;

[0046] Step 2: When the light sheet laser 10.2 emits a laser surface parallel to the axis of the main axis 3 to expose the tracer particles in the axial cross-section flow field at the impeller outlet, the CCD camera 10.1 is aimed at the area to be tested in a direction perpendicular to the light sheet to expose and shoot, thereby obtaining image information of the axial cross-section flow field at the impeller outlet at different times;

[0047] Step 3: Place the CCD camera 10.1 at different sections of the impeller perpendicular to the main axis for exposure and shooting.

[0048] Step 4: Record data through the computer 10.3, post-process the taken photos, and obtain the flow field distribution on the section parallel to the main axis 3.

[0049] Step 5: In the PIV test, the positions of the light sheet laser 10.2 and the CCD camera 10.1 are exchanged using the above steps to obtain the flow field distribution on the cross section perpendicular to the main axis.

[0050] The embodiments are preferred implementations of the present invention, but the present invention is not limited to the above-mentioned implementations. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essential content of the present invention belong to the protection scope of the present invention.

Claims

1. A visual comprehensive test device for a water tank cleaning machine, characterized in that: include: Water storage device (1), motor (2), main shaft (3), impeller (4), flow guide device (5), volute (6), connecting bolts (7), elbow (8), baffle (9), PIV measurement system (10); The water storage device (1) comprises an upstream and downstream part, the upstream part is a water storage tank (1.2), and the downstream part is a test section (1.3), and the bottoms are connected; The flow guide device (5) comprises a flow guide ring (5.1), a fixing plate (5.2) and a flow guide device fixing base (5.3); the flow guide ring (5.1) is located in the middle of the fixing plate (5.2); The impeller (4) is located inside the volute (6) and the guide ring (5.1), and is connected to the main shaft (3), the main shaft (3) is connected to the motor (2), and the motor (2) is connected to the water storage device test section (1.3) through the motor mounting seat (1.8) and six motor positioning holes (1.9); The guide ring (5.1) and the interior of the volute (6) smoothly transition to form a smooth whole; the bottom of the guide ring (5.1) is connected to the test section (1.3) of the water storage device; the test section (1.3) of the water storage device (1) is connected to the water storage tank (1.2) of the water storage device (1); and the top of the water storage tank (1.2) is open; The outlet section (6.1) of the volute (6) is connected to the inlet section (1.5) of the water outlet pipe of the water storage device via a connecting bolt (7), and the outlet section (1.6) of the water outlet pipe is connected to the inlet section (8.1) of the elbow; The diameter of the inlet section of the volute (6) is the same as the outer diameter of the guide ring (5.1); The impeller (4), the flow guide device (5) and the volute (6) are detachably arranged; the impeller (4), the volute (6), the flow guide device (5), the water storage device (1) and the baffle (9) are made of transparent material; The PIV measurement system (10) comprises a CCD camera (10.1), a sheet light source laser (10.2) and a computer (10.3), wherein the CCD camera and the sheet light source laser are respectively connected to the computer.

2. A visual comprehensive test device for a water tank cleaning machine according to claim 1, characterized in that: The transparent material of the impeller (4), the volute (6), the flow guide device (5), the water storage device (1) and the baffle (9) is organic glass.

3. A visual comprehensive test device for a water tank cleaning machine according to claim 1, characterized in that: A measuring cylinder (1.1) is provided on the side wall of the water storage tank (1.2) of the water storage device to observe the water level in real time and conduct tests at different water levels.

4. A visual comprehensive test device for a water tank cleaning machine according to claim 1, characterized in that: The test section (1.3) of the water storage device is connected to the baffle (9) via a boss (1.4), which can prevent water surface fluctuations under immersion conditions.

5. A visual comprehensive test device for a water tank cleaning machine according to claim 4, characterized in that: The baffle plate is equal to the boss of the water storage device in length and width.

6. A visual comprehensive test device for a water tank cleaning machine according to claim 1, characterized in that: The bottom surface of the test section (1.3) of the water storage device is provided with four positioning bases (1.7) which are connected to the flow guide device (5) and the volute (6) via screws.

7. The internal flow field PIV measurement method of the visualization comprehensive test device of the water tank cleaning machine according to any one of claims 1 to 6 is characterized in that: The sheet light source laser (10.2) emits a laser sheet light source, which penetrates the baffle (9), the volute (6) and the impeller (4) from the top; the CCD camera (10.1) is arranged from the side, and the CCD camera is perpendicular to the laser sheet light source; the CCD camera (10.1) obtains image information of the internal cross-sectional flow field of the water tank cleaning machine, and the computer (10.3) performs cross-correlation processing on the image to obtain velocity field information, and obtains velocity vector diagram and cloud diagram through software processing.

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