Centrifugal pump impeller sediment abrasion experimental device

Abstract

The present application relates to the field of impeller sediment wear experiment, discloses a centrifugal pump impeller sediment wear experiment device, including a number of support feet connected with the bottom of the sediment frame, the upper end of the sediment frame is fixedly provided with a hexagonal column, the periphery of the hexagonal column is provided with an annular column, the annular column is fixedly arranged on the upper end of the sediment frame, the upper end of the annular column is provided with an impeller driving assembly, a plurality of impeller mounting assemblies are mounted on the sidewall of the hexagonal column, the upper end of the sediment frame is provided with a sediment outlet. Compared with the prior art, the six different impeller mounting assemblies can test six impellers synchronously, increase the control experiment, improve the test accuracy, the impeller rotation driving power is consistent, the impeller speed is consistent, the impeller itself is detachably mounted, including an impeller plate and a plurality of impeller blades mounted thereon, facilitating the observation of the impeller plate and the impeller blade, improving the observation accuracy and ensuring the accuracy of the experimental data.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of impeller sediment wear experiment, in particular to a centrifugal pump impeller sediment wear experiment device. BACKGROUND

[0002] The centrifugal pump has the characteristics of large flow and high lift, and is widely used in water lifting irrigation in the Yellow River irrigation area. Because the sediment content of the Yellow River is large, it causes serious wear to the flow parts of the double-suction centrifugal pump, among which the wear of the centrifugal pump impeller is particularly serious, which in turn causes the water flow of the double-suction centrifugal pump to decrease, the efficiency to decrease, and the service life to be shortened, and is prone to vibration and noise, which seriously endangers the safe and stable operation of the double-suction centrifugal pump. It is of great significance to study the sediment wear law of the double-suction centrifugal pump impeller for improving the efficient, energy-saving, safe and stable operation of the double-suction centrifugal pump. In the current research, the sediment wear experiment of the centrifugal pump impeller is mostly macro-qualitative research, that is, the sediment wear law is explored by studying the sediment wear of the blade during the overall operation of the double-suction centrifugal pump, and the micro-quantitative research on the sediment wear is less. One of the reasons is that there is a lack of relatively accurate and suitable experimental device and experimental method

[0003] After a large amount of retrieval, it is found that the prior art with publication number CN114909301A discloses a centrifugal pump impeller sediment wear experiment device and experiment method, which comprises a main working device, an impact speed adjusting device, an impact angle adjusting device and a temperature control device.

[0004] Therefore, based on the above retrieval and in combination with the existing experimental equipment, the wear degree is judged by the mass change before and after the impeller, if the impeller itself is weighed, the mass change of the impeller itself is very small in the case of small wear amount, and the mass change cannot be accurately weighed, if the experimental time is increased to increase the mass change, the equipment cost is increased, it is easy to be damaged, if a small mass object of the same material is fixed on the impeller itself to simulate the mass change of the impeller, the object cannot cover the impeller blade itself, and the wear degree of the impeller disc cannot be obtained, and in this way, the surface area of the impeller itself changes, the contact probability with the sediment changes, effective data cannot be obtained, a large number of contrast experiments cannot be carried out, the experiment is time-consuming, and the experimental cost is increased. Based on the above problems, the present application provides a centrifugal pump impeller sediment wear experiment device. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a centrifugal pump impeller sediment wear experiment device, which has the advantages of multiple contrast experiments, detachable impeller structure and the like, and solves a series of problems such as insufficient experimental accuracy and high experimental cost.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a centrifugal pump impeller sand wear experimental device, comprising a sand frame and a plurality of supporting feet connected to the bottom of the sand frame, a hexagonal column is fixedly arranged at the upper end of the sand frame, an annular column is arranged on the periphery of the hexagonal column, the annular column is fixedly arranged at the upper end of the sand frame, an impeller driving assembly is installed at the upper end of the annular column, a plurality of impeller mounting assemblies are installed on the side wall of the hexagonal column, and a sand outlet is arranged in the middle of the upper end of the sand frame.

[0007] Preferably, the impeller mounting assembly comprises a plurality of impeller mounting frames fixed on the inner side wall of the hexagonal column, a driving rod is rotatably connected to the side wall of the hexagonal column in the impeller mounting frame, a impeller plate is sleeved on one end of the outer surface of the driving rod, a plurality of impeller blades are arranged on the surface of the impeller plate, a transmission gear is fixedly connected to the other end of the driving rod which extends out of the hexagonal column, the impeller blades are installed on the impeller plate through blade fixing pieces, a return pipe is connected to the upper end of the impeller mounting frame, the end of the return pipe is connected to the sand frame, a connecting ring is integrally arranged at the end of the impeller mounting frame, an installation ring is rotatably installed in the connecting ring through threads, and a sand density screen is arranged between the installation ring and the impeller mounting frame.

[0008] Preferably, the impeller mounting assembly installed on the hexagonal column is provided with six groups, and the aperture of the sand density screen arranged in the six groups of impeller mounting assemblies increases in turn.

[0009] Preferably, the impeller driving assembly comprises a transmission gear ring rotatably installed at the upper end of the annular column, a side gear ring is fixedly installed on the peripheral surface of the transmission gear ring, a plurality of transmission gears on the periphery of the hexagonal column are engaged with the transmission gear ring, a second motor is installed on the outer side wall of the annular column, a driving gear is fixedly connected to the output end of the second motor, and the driving gear is engaged with the side gear ring.

[0010] Preferably, a plurality of blade mounting grooves are arranged on the impeller plate, the impeller blades are inserted into the blade mounting grooves, and a plurality of positioning holes are arranged on the impeller blades.

[0011] Preferably, the blade fixing piece comprises a fixing shaft fixed on the outer surface of the driving rod, a plurality of fixing plates are connected to the outer surface of the fixing shaft, a plurality of positioning rods are slidably inserted into the fixing plates, a telescopic plate is fixedly connected to the end of the positioning rod, a return spring is sleeved on the outer surface of the positioning rod, the two ends of the return spring are fixedly connected to the telescopic plate and the fixing plate respectively, and the positioning rod is inserted into the corresponding positioning hole on the impeller blade.

[0012] Preferably, a sand uniformizing shaft is rotatably installed in the inner bottom of the sand outlet, a first motor is installed at the bottom end of the sand frame, and the output end of the first motor is fixedly connected to the sand uniformizing shaft.

[0013] Compared with the prior art, the centrifugal pump impeller sediment wear experimental device has the following beneficial effects:

[0014] 1. The centrifugal pump impeller sediment wear experimental device can test six impellers synchronously through six different impeller mounting assemblies, increase the control experiment, improve the test accuracy, the impeller rotating driving power is consistent, and the impeller rotating speed is consistent.

[0015] 2. The centrifugal pump impeller sediment wear experimental device is detachably mounted, comprises an impeller plate and a plurality of impeller pieces mounted on the impeller plate, facilitates separate observation of the impeller plate and the impeller pieces, improves the observation accuracy, and guarantees the accuracy of experimental data.

[0016] 3. The centrifugal pump impeller sediment wear experimental device is provided with a sediment density screen with different hole diameters, can filter the sediment, and can experiment on the impeller wear degree under different sediment content conditions, the sediment density screen can be replaced, and the experimental operation is simple and convenient. DETAILED DESCRIPTION

[0017] Figure 1 It is a top view perspective structural schematic diagram of the present application.

[0018] Figure 2 It is a bottom view perspective structural schematic diagram of the present application.

[0019] Figure 3 It is a schematic diagram of the connection and installation structure of the impeller driving part and the impeller mounting assembly of the present application.

[0020] Figure 4 It is a hexagonal column perspective structural schematic diagram of the present application.

[0021] Figure 5 It is a schematic diagram of the connection and installation structure of the impeller driving part and the impeller mounting assembly of the present application.

[0022] Figure 6 It is a schematic diagram of the connection and installation structure of the impeller driving part and the impeller mounting assembly of the present application.

[0023] Figure 7 It is a schematic diagram of the connection and installation structure of the impeller driving part and the impeller mounting assembly of the present application.

[0024] Figure 8 It is a schematic diagram of the connection and installation structure of the impeller driving part and the impeller mounting assembly of the present application.

[0025] Figure 9 It is a schematic diagram of the connection and installation structure of the impeller driving part and the impeller mounting assembly of the present application.

[0026] In the figure: 1, support foot; 2, annular column; 3, silt frame; 4, hexagonal column; 5, impeller driving assembly; 6, impeller mounting assembly; 7, first motor; 8, return pipe; 9, impeller mounting frame; 10, driving gear; 11, second motor; 12, transmission gear ring; 13, side gear ring; 14, transmission gear; 15, driving rod; 16, silt outlet; 17, sand uniformizing shaft; 18, blade fixing piece; 19, impeller plate; 20, connecting ring; 21, silt density screen; 22, mounting ring; 23, impeller blade; 24, blade mounting groove; 25, fixed shaft; 26, expansion plate; 27, return spring; 28, fixed plate; 29, positioning rod; 30, positioning hole. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0028] As introduced in the background, there are deficiencies in the prior art. In order to solve the above technical problems, the present application provides a centrifugal pump impeller silt abrasion experimental device.

[0029] In a typical embodiment of the present application, as shown in Figures 1-9 A centrifugal pump impeller silt abrasion experimental device includes a silt frame 3 and a plurality of support feet 1 connected to the bottom of the silt frame 3. The upper end of the silt frame 3 is fixedly provided with a hexagonal column 4. The periphery of the hexagonal column 4 is provided with an annular column 2, which is fixedly arranged at the upper end of the silt frame 3. The upper end of the annular column 2 is installed with an impeller driving assembly 5. A plurality of impeller mounting assemblies 6 are installed on the side wall of the hexagonal column 4. The upper end of the silt frame 3 is provided with a silt outlet 16.

[0030] In this embodiment, the silt frame 3 and the hexagonal column 4 at the upper end thereof are filled with silt for impeller testing. The impeller to be tested is installed in the impeller mounting assembly 6. The impeller is driven to rotate by the impeller driving assembly 5. During the rotation of the impeller, water with silt is extracted. After the impeller works for a period of time, the impeller is taken out and weighed to realize the impeller abrasion test.

[0031] As a preferred embodiment in the embodiment, the impeller mounting assembly 6 comprises a plurality of impeller mounting frames 9 fixed on the inner side wall of the hexagonal column 4, a driving rod 15 is rotatably connected to the side wall of the hexagonal column 4 in the impeller mounting frame 9, the outer surface of one end of the driving rod 15 is sleeved with an impeller plate 19, the surface of the impeller plate 19 is provided with a plurality of impeller blades 23, the other end of the driving rod 15 extends out of the hexagonal column 4 and is fixedly connected with a transmission gear 14, the impeller blades 23 are installed on the impeller plate 19 through a blade fixing piece 18, the upper end of the impeller mounting frame 9 is connected with a return pipe 8, the end of the return pipe 8 is connected with the silt frame 3, the end of the impeller mounting frame 9 is integrally provided with a connecting ring 20, the connecting ring 20 is rotatably installed in the connecting ring 20 through a thread, a mounting ring 22 is provided between the mounting ring 22 and the impeller mounting frame 9, a silt density screen 21 is provided, six sets of impeller mounting assemblies 6 are provided on the hexagonal column 4, the aperture of the silt density screen 21 provided in the six sets of impeller mounting assemblies 6 increases in turn, the impeller driving assembly 5 comprises a transmission gear ring 12 rotatably installed on the upper end of the annular column 2, a side tooth ring 13 is fixedly installed on the outer surface of the transmission gear ring 12, a plurality of transmission gears 14 on the periphery of the hexagonal column 4 are engaged with the transmission gear ring 12, a second motor 11 is installed on the outer side wall of the annular column 2, a driving gear 10 is fixedly connected to the output end of the second motor 11, the driving gear 10 is engaged with the side tooth ring 13, a sand uniformizing shaft 17 is rotatably installed in the bottom of the silt outlet 16, a first motor 7 is installed at the bottom end of the silt frame 3, the output end of the first motor 7 is fixedly connected with the sand uniformizing shaft 17, a plurality of blade installation grooves 24 are provided on the impeller plate 19, the impeller blades 23 are inserted in the blade installation grooves 24, a plurality of positioning holes 30 are provided on the impeller blades 23, the blade fixing piece 18 comprises a fixed shaft 25 fixed on the outer surface of the driving rod 15, a plurality of fixed plates 28 are connected to the outer surface of the fixed shaft 25, a plurality of positioning rods 29 are slidably inserted in the fixed plates 28, the ends of the plurality of positioning rods 29 are fixedly connected with the expansion plates 26, the outer surface of the positioning rods 29 is sleeved with return springs 27, the two ends of the return springs 27 are fixedly connected with the expansion plates 26 and the fixed plates 28 respectively, the positioning rods 29 are inserted in the corresponding positioning holes 30 on the impeller blades 23.

[0032] The hexagonal column 4 in the embodiment is hexagonal, and the impeller mounting assembly 6 is mounted on the six sides of the hexagonal column 4. The impeller includes an impeller plate 19 and a plurality of impeller blades 23. When the impeller is mounted, the expansion plate 26 and the positioning rod 29 connected thereto are pulled up, the impeller blades 23 are inserted into the blade mounting slots 24 on the impeller plate 19, then the expansion plate 26 is loosened, and under the action of the return spring 27, the positioning rod 29 is inserted into a plurality of positioning holes 30 on the impeller blades 23, thereby achieving the installation of the impeller blades 23. Subsequently, the second motor 11 and the first motor 7 are turned on, the second motor 11 drives the driving gear 10 to rotate, the driving gear 10 drives the side tooth ring 13 engaged therewith to rotate, and the transmission gear ring 12 fixedly connected with the side tooth ring 13 rotates synchronously, a plurality of transmission gears 14 engaged with the transmission gear ring 12 rotate, the driving rod 15 connected with the transmission gears 14 rotates synchronously, and the impeller mounted on the driving rod 15 rotates synchronously, thereby ensuring that the driving power of the impellers installed in each group of impeller mounting assemblies 6 is the same, ensuring the same rotating speed, and the first motor 7 drives the sand uniformizing shaft 17 to rotate, thereby ensuring the uniformity of the sand content in the water in the hexagonal column 4 and the sand frame 3;

[0033] When the same impeller is subjected to wear test, the same impeller is mounted in the impeller mounting frame 9 in the six groups of impeller mounting assemblies 6, the impeller is fixed on the driving rod 15, then the mounting ring 22 is mounted on the impeller mounting frame 9, the mounting ring 22 and the connecting ring 20 in the impeller mounting frame 9 are mounted by thread rotation, the sand density screen 21 is fixedly arranged in the mounting ring 22, the sand density screens 21 mounted on the six groups of impeller mounting frames 9 have different hole diameters, the sand content entering the impeller mounting frame 9 through the rotating impeller is different, the wear test of the same impeller is performed, after the test is completed, the impeller plate 19 and the plurality of impeller blades 23 thereon are removed, the impeller plate 19 and the plurality of impeller blades 23 are weighed respectively, the wear amount of the impeller plate 19 and the impeller blades 23 is determined according to the mass change before and after the test, the entire impeller is not weighed, the detachable impeller is weighed respectively, the blade wear percentage can be more intuitively reflected, the impeller blades 23 at different installation positions can be weighed respectively, the wear degree of the impeller blades 23 at different positions can be detected, the impeller blades 23 can also be observed in detail, the surface wear marks of the impeller blades 23 can be determined, and the accurate experiment of the impeller sand wear is realized. In the above process, the material of each group of impeller plates 19 and the impeller blades 23 mounted thereon is the same material;

[0034] When the impellers of different materials are subjected to sand wear test, there are two ways:

[0035] The first kind: the above-mentioned way is used to install and experiment the impeller blade 23, but the material of each impeller blade 23 on the impeller plate 19 is different, the impeller blades 23 of different materials are installed on the same impeller plate 19 and are divided into six groups, in addition, the installation positions of the impeller blades 23 of the same material on each impeller plate 19 are also different, it is required to ensure that the mass and shape of the impeller blades 23 of different materials on the impeller plate 19 are the same, so that eccentric force is not generated in the rotating process of the impeller plate 19, finally, the impeller blades 23 on each impeller plate 19 after experiment are weighed respectively, the wear degree of the impeller blades 23 of different materials under different silt contents can be obtained at the same time, the wear degree of a plurality of materials under different silt contents can be obtained at the same time, the experimental efficiency is improved, the experimental time is shortened, and a large amount of experimental data can be obtained, and the materials of the impeller plates 19 in each impeller installation assembly 6 are the same in the above-mentioned process;

[0036] The second kind: the above-mentioned way is used to install and experiment the impeller blade 23, the materials of the impeller blades 23 installed on each impeller plate 19 are the same, but the materials of the impeller blades 23 in the six groups of impeller plates 19 are different, at this time, the pore diameters of the silt density screens 21 in each impeller installation assembly 6 are the same, that is, the silt wear degrees of the impeller blades 23 of different materials under the same silt content can be obtained, and the materials of the impeller plates 19 and the impeller blades 23 in the same impeller installation assembly 6 are the same in the above-mentioned process.

[0037] In summary, the impeller plate 19 and the impeller blade 23 in the impeller are independent structures, the impeller blades 23 of different materials or the same material can be conveniently experimented, a large amount of contrast experiments can be performed, the experimental efficiency and the experimental accuracy are improved, the impeller plates 19 and the impeller blades 23 before and after the experiment are weighed respectively, the silt wear degrees of the impeller plates 19 and the impeller blades 23 are judged according to the weight, and the accuracy is high.

[0038] The working principle of the present application is as follows: when in use, when installing the impeller, the telescopic plate 26 and the positioning rod 29 connected thereto are pulled up, the impeller blade 23 is inserted into the blade installation groove 24 on the impeller plate 19, then the telescopic plate 26 is loosened, the positioning rod 29 is inserted into the plurality of positioning holes 30 on the impeller blade 23 under the action of the reset spring 27, the installation of the impeller blade 23 is realized, then the second motor 11 and the first motor 7 are opened, the second motor 11 drives the driving gear 10 to rotate, the driving gear 10 drives the side tooth ring 13 meshing therewith to rotate, the transmission gear ring 12 fixedly connected with the side tooth ring 13 rotates synchronously, the plurality of transmission gears 14 meshing with the transmission gear ring 12 rotates, the driving rod 15 connected with the transmission gears 14 rotates synchronously, the impeller installed on the driving rod 15 rotates synchronously, the driving power of the impeller installed in each impeller installation assembly 6 is ensured to be the same, the same rotating speed is ensured, the first motor 7 drives the sand uniformizing shaft 17 to rotate, and the silt content of the water in the sand frame 3 and the hexagonal column 4 is uniform.

[0039] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A centrifugal pump impeller sludge wear test device, comprising a sludge frame (3) and several supporting feet (1) connected to its bottom, characterized in that: A hexagonal column (4) is fixedly installed at the upper end of the sediment frame (3). An annular column (2) is installed around the hexagonal column (4). The annular column (2) is fixedly installed at the upper end of the sediment frame (3). An impeller drive assembly (5) is installed at the upper end of the annular column (2). Several impeller mounting assemblies (6) are installed on the side wall of the hexagonal column (4). A sediment outlet (16) is provided in the middle of the upper end of the sediment frame (3). The impeller mounting assembly (6) includes several impeller mounting frames (9) fixed on the inner side wall of the hexagonal column (4). A drive rod (15) is rotatably connected to the side wall of the hexagonal column (4) inside the impeller mounting frame (9). An impeller plate (19) is fitted on the outer surface of one end of the drive rod (15). Several impeller blades are provided on the surface of the impeller plate (19). 23), the other end of the drive rod (15) extends out of the hexagonal column (4) and is fixedly connected to the transmission gear (14). The impeller blade (23) is installed on the impeller plate (19) through the blade fixing piece (18). The upper end of the impeller mounting frame (9) is connected to the return pipe (8). The end of the return pipe (8) is connected to the mud and sand frame (3). The end of the impeller mounting frame (9) is integrally provided with a connecting ring (20). The mounting ring (22) is installed in the connecting ring (20) by rotating the thread. The mud and sand density screen (21) is provided between the mounting ring (22) and the impeller mounting frame (9). The impeller mounting assembly (6) installed on the hexagonal column (4) is provided with six sets. The aperture of the mud and sand density screen (21) provided in the six sets of impeller mounting assemblies (6) increases sequentially.

2. The centrifugal pump impeller sediment wear test apparatus according to claim 1, characterized in that: The impeller drive assembly (5) includes a transmission gear ring (12) rotatably mounted on the upper end of the annular column (2). A side gear ring (13) is fixedly mounted on the outer surface of the transmission gear ring (12). The transmission gear ring (12) meshes with a plurality of transmission gears (14) on the periphery of the hexagonal column (4). A second motor (11) is mounted on the outer wall of the annular column (2). A drive gear (10) is fixedly connected to the output end of the second motor (11). The drive gear (10) meshes with the side gear ring (13).

3. The centrifugal pump impeller sediment wear test apparatus according to claim 2, characterized in that: The impeller plate (19) is provided with several blade mounting slots (24), the impeller blades (23) are inserted in the blade mounting slots (24), and the impeller blades (23) are provided with several positioning holes (30).

4. The centrifugal pump impeller sediment wear test apparatus according to claim 3, characterized in that: The blade fixing component (18) includes a fixing shaft (25) fixed on the outer surface of the drive rod (15). Several fixing plates (28) are connected to the outer surface of the fixing shaft (25). Several positioning rods (29) are slidably inserted on the fixing plates (28). Telescopic plates (26) are fixedly connected to the ends of the positioning rods (29). A return spring (27) is sleeved on the outer surface of the positioning rods (29). The two ends of the return spring (27) are fixedly connected to the telescopic plate (26) and the fixing plate (28) respectively. The positioning rods (29) are inserted into the corresponding positioning holes (30) on the impeller blades (23).

5. The centrifugal pump impeller sludge wear test apparatus according to claim 4, characterized in that: A sand-leveling shaft (17) is rotatably installed at the bottom of the sediment outlet (16), and a first motor (7) is installed at the bottom of the sediment frame (3). The output end of the first motor (7) is fixedly connected to the sand-leveling shaft (17).

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