Water pump no-load test equipment

Abstract

The utility model discloses a water pump no-load test device which comprises a machine body and a test unit assembled on the machine body. The testing unit comprises a base, a positioning tool which is detachably assembled on the base and is used for placing the water pump body, a vertical moving mechanism assembled on the base and a vibration sensor which is assembled at the output end of the vertical moving mechanism through an elastic connecting mechanism and can be pressed on the water pump body, and the vibration sensor is elastically pressed on the water pump body; namely, the water pump body has a certain degree of freedom of movement after being started, the water pump body can push the vibration sensor to move upwards, the shell of the water pump body can generate small-amplitude displacement due to vibration, and the vibration sensor is pressed on the shell of the water pump body, so that the numerical accuracy of a detected vibration value can be improved; the water pump body pushes the vibration sensor to be separated from the water pump body in the vibration process, and the elastic connecting mechanism can push the vibration sensor to make contact with the surface of the water pump body.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic water pump testing, and specifically, to a no-load testing device for a water pump. Background Art

[0002] An electronic water pump is a new type of water pump used to control liquid transmission. It uses piezoelectric materials as power devices, and realizes complete electronization from control to drive. It fully controls liquid transmission with an electronic integrated system, thereby achieving the adjustability and accuracy of liquid transmission. An electronic water pump has the advantages of being able to accurately transport liquids, the speed of transporting liquids being adjustable, having a built-in operation panel, being small in size, and light in weight.

[0003] The Chinese invention patent "Electronic Water Pump Waterproof Breather Plug Assembly and Vibration Testing Device and Its Operation Method" with the publication number CN114634021B discloses an electronic water pump waterproof breather plug assembly and vibration testing device and its operation method. When the photoelectric sensor on the photoelectric sensor mounting post confirms that the electronic water pump is placed on the vibration testing mechanism, the limit cylinders at both ends of the support plate drive the tooling clamping frame to fix and limit the electronic water pump on the vibration detection sensor. Then, the power connection is energized, causing the electronic water pump to run without load. The vibration detection sensor records and outputs the vibration values during the no-load process of the electronic water pump.

[0004] However, the above patent still has the following deficiencies. When conducting a no-load test on an electronic water pump, a pair of tooling clamping frames fix and limit the electronic water pump and the vibration detection sensor. The pair of tooling clamping frames limit the freedom of movement of the electronic water pump, that is, they limit the vibration amplitude of the electronic water pump housing. The vibration detection sensor detects the vibration value by contacting the electronic water pump housing. The pair of tooling clamping frames clamping the electronic water pump and preventing it from moving will affect the accuracy of the collected vibration values. Therefore, a no-load testing device for a water pump needs to be designed. Summary of the Utility Model

[0005] Aiming at the above technical problems, the purpose of the utility model is to overcome the problem in the prior art that the tooling clamping frame fixes and limits the electronic water pump on the vibration detection sensor, which will affect the accuracy of the collected vibration data.

[0006] To achieve the above purpose, the utility model provides a no-load testing device for a water pump, including: a machine body and a testing unit assembled on the machine body. The testing unit includes a base, a positioning tooling detachably assembled on the base for placing the water pump body, a vertical moving mechanism assembled on the base, and a vibration sensor assembled on the output end of the vertical moving mechanism through an elastic connection mechanism and capable of pressing on the water pump body.

[0007] Preferably, the test unit further includes a noise sensor assembled on the base through a mounting mechanism and facing the water pump body.

[0008] Preferably, the test unit further includes a sound insulation box body, a sound insulation cover hinged to the open end at the top of the sound insulation box body, and at least one first cylinder hinged to the outer wall of the sound insulation box body with the piston end hinged to the sound insulation cover, and the base is assembled inside the sound insulation box body.

[0009] Preferably, the elastic connection mechanism includes a connection seat fixedly connected to the output end of the vertical movement mechanism, a connection frame located below the connection seat and vertically slidably connected to the connection seat, and an elastic member for pushing the connection frame to slide downward, and the vibration sensor is assembled on the connection frame.

[0010] Preferably, a plurality of guide rods vertically slidably passing through the connection seat are fixedly connected to the connection frame, and a limiting member is fixedly connected to the upper end of at least one guide rod;

[0011] The elastic member is at least one spring sleeved on the corresponding guide rod, and two ends of the spring respectively abut against the connection frame and the connection seat.

[0012] Preferably, the mounting mechanism includes an adjusting plate in close contact with the base and a support frame fixedly installed on the adjusting plate for the noise sensor to be assembled. At least one strip-shaped through groove is provided through the adjusting plate, one end of the strip-shaped through groove is close to the positioning tooling, and a locking bolt threadedly connected to the base and passing through the strip-shaped through groove and having a head that can abut against the adjusting plate is provided.

[0013] Preferably, a mounting base is fixedly installed on the base, a plurality of threaded holes are recessed in the mounting base, mounting holes matching the corresponding threaded holes are provided through the positioning tooling, and mounting bolts threadedly connected to the threaded holes and passing through the mounting holes and having heads that can abut against the positioning tooling are provided.

[0014] Preferably, a defective product slideway is provided on the machine body below the test unit.

[0015] Preferably, an oscilloscope for detecting the passing current when the water pump body runs without load is provided inside the machine body.

[0016] Preferably, a wire passing through groove is provided through the outer wall of the sound insulation box body.

[0017] According to the above technical solution, a no-load test device for a water pump provided by the utility model has the following beneficial effects when in use: First, the vibration sensor is elastically pressed on the water pump body, that is, the water pump body has a certain degree of freedom of movement after starting. The water pump body can push the vibration sensor upward, and the housing of the water pump body can have a small displacement due to vibration. The vibration sensor is pressed on the housing of the water pump body, which can improve the numerical accuracy of the detected vibration value;

[0018] Second, because the water pump body will generate vibration during no-load operation, the vibration sensor needs to be assembled on the output end of the vertical moving mechanism through an elastic connection mechanism. Even if the water pump body pushes the vibration sensor to separate from it during vibration, the elastic connection mechanism can also push the vibration sensor into contact with the surface of the water pump body;

[0019] Third, the elastic connection mechanism can also absorb the vibration transmitted from the water pump body to the vibration sensor, thereby extending the service life of the vibration sensor.

[0020] Other features and advantages of the utility model will be described in detail in the subsequent specific implementation part; and the parts not involved in the utility model are the same as the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are used to provide a further understanding of the utility model and constitute a part of the specification. Together with the following specific implementation, they are used to explain the utility model, but do not constitute a limitation to the utility model. In the drawings:

[0022] Figure 1 is a three-dimensional structural schematic diagram of a no-load test device for a water pump provided by the present utility model;

[0023] Figure 2 is a partial three-dimensional structural schematic diagram of a no-load test device for a water pump provided by the present utility model Figure 1 ;

[0024] Figure 3 is a partial three-dimensional structural schematic diagram of a no-load test device for a water pump provided by the present utility model Figure 2 ;

[0025] Figure 4 is a partial three-dimensional structural schematic diagram of a no-load test device for a water pump provided by the present utility model Figure 3 。

[0026] DESCRIPTION OF THE REFERENCE NUMERALS

[0027] 1. Body; 2. Base; 3. Positioning tooling; 4. Vertical moving mechanism; 5. Vibration sensor; 6. Noise sensor; 7. Sound insulation box; 8. Sound insulation cover; 9. First cylinder; 10. Connecting seat; 11. Connecting frame; 12. Elastic member; 13. Guide rod; 14. Limiting member; 15. Adjusting plate; 16. Strip-shaped through groove; 17. Locking bolt; 18. Installation base; 19. Installation bolt; 20. Reject chute; 21. Wire threading through groove. Detailed implementation manners

[0028] The following will describe in detail the specific implementation manners of the present utility model with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.

[0029] In the present utility model, unless otherwise stated, the orientation terms such as "upper, lower, inner, outer" included in the terms only represent the orientation of the terms in the normal use state, or the common names understood by those skilled in the art, and should not be regarded as a limitation to the terms.

[0030] As Figures 1-4 shown, a no-load test device for a water pump includes: a body 1 and a test unit assembled on the body 1. The test unit includes a base 2, a positioning tooling 3 detachably assembled on the base 2 for placing the water pump body, a vertical moving mechanism 4 assembled on the base 2, and a vibration sensor 5 assembled on the output end of the vertical moving mechanism 4 through an elastic connection mechanism and capable of pressing on the water pump body.

[0031] A machine cover is assembled on the body 1 and sleeved outside the test unit. A display, a safety light curtain and a three-color light are assembled on the body 1. An industrial control computer and a programmable power supply are also installed inside the body 1.

[0032] On the upper surface of the body 1 and on one side of the detection unit, a barcode scanner is provided for obtaining the two-dimensional code information on the water pump body. The two-dimensional code information on the water pump body can be read through the barcode scanner to obtain and record the serial number information of the water pump body. In this way, the information of the water pump body to be detected can be understood, and its information can be bound to its detection data, so as to facilitate the subsequent retrieval and understanding of the detection data of the water pump body, and facilitate the management, viewing and traceability of the detected data.

[0033] When testing the water pump body, place the water pump body on the positioning tooling 3. The output end of the vertical moving mechanism 4 drives the vibration sensor 5 to move downward. The vertical moving mechanism 4 can adopt a second cylinder, so that the vibration sensor 5 presses on the water pump body. After the water pump body is powered on and started, the vibration sensor 5 will detect the vibration value when the water pump body is running without load. The value measured by the vibration sensor 5 will be transmitted to the industrial control computer, and the industrial control computer will determine whether the water pump body is qualified or unqualified according to the preset threshold, and the value of the water pump body being tested and the qualified / unqualified result will be displayed on the display screen.

[0034] When it is necessary to test water pump bodies of different models, remove the positioning tooling 3 from the base 2 and replace it with the positioning tooling 3 corresponding to the water pump body, then the water pump bodies of different models can be tested.

[0035] The vibration sensor 5 is elastically pressed on the water pump body, that is, the water pump body has a certain degree of freedom of movement after starting. The shell of the water pump body can have a small displacement due to vibration, and the vibration sensor is pressed on the shell of the water pump body, which can improve the numerical accuracy of the detected vibration value; because the water pump body will generate vibration during no-load operation, the vibration sensor 5 needs to be assembled on the output end of the vertical moving mechanism 4 through an elastic connection mechanism, so that even if the water pump body vibrates, the elastic connection mechanism can push the vibration sensor 5 to contact the surface of the water pump body; at the same time, the elastic connection mechanism can also absorb the vibration transmitted from the water pump body to the vibration sensor 5, thereby extending the service life of the vibration sensor 5.

[0036] The test unit further includes a noise sensor 6 assembled on the base 2 through a mounting mechanism and facing the water pump body.

[0037] The noise sensor 6 can detect the noise value when the water pump body is running without load. The threshold can be set through the industrial control computer. After receiving the value detected by the noise sensor 6, the industrial control computer will compare it with the preset threshold to display on the monitor whether the noise value generated when the water pump body is running without load is qualified.

[0038] The test unit further includes a sound insulation box 7, a sound insulation cover 8 hinged to the top opening end of the sound insulation box 7, and at least one first cylinder 9 hinged to the outer wall of the sound insulation box 7 and with the piston end hinged to the sound insulation cover 8. The base 2 is assembled inside the sound insulation box 7.

[0039] The sound insulation box 7 and the sound insulation cover 8 can use common sound insulation materials such as sound insulation cotton, or other sound insulation materials. The functions of the sound insulation box 7 and the sound insulation cover 8 are to isolate external sounds, thereby improving the accuracy of the values detected by the noise sensor 6. The first cylinder 9 can control the opening and closing of the sound insulation cover 8.

[0040] The elastic connection mechanism includes a connection seat 10 fixedly connected to the output end of the vertical movement mechanism 4, a connection frame 11 located below the connection seat 10 and vertically slidably connected to the connection seat 10, and an elastic member 12 for pushing the connection frame 11 to slide downward. The vibration sensor 5 is assembled on the connection frame 11.

[0041] After the water pump body is placed on the positioning tooling 3, the vertical movement mechanism 4 drives the connection seat 10 and the connection frame 11 to move downward, so that the vibration sensor 5 contacts the surface of the water pump body. During the test, the vibration generated by the water pump body will push the vibration sensor 5 upward. The elastic member 12 can also push the vibration sensor 5 to contact the water pump body during the process of absorbing vibration, so as to improve the accuracy of detection of the vibration sensor 5; at the same time, the connection frame 11 is slidably connected to the connection seat 10, so that the connection frame 11 can slide, that is, the pressure generated by the vibration sensor 5 on the water pump body after contact is small, and the influence on the vibration of the water pump body itself is small, which can reduce the influence of the vibration sensor 5 pressing on the water pump body on the water pump body itself.

[0042] When testing water pump bodies of different models, the corresponding positioning tooling 3 will be replaced. However, the contact point heights between water pump bodies of different models and the vibration sensor 5 will be different. At this time, the sliding of the connection frame 11 relative to the connection seat 10 can also play an adjustment role. When the contact point heights are different, the vibration sensor 5 can also be made to abut against the water pump body by adjusting the distance between the connection frame 11 and the connection seat 10.

[0043] A plurality of guide rods 13 vertically slidably passing through the connection seat 10 are fixedly connected to the connection frame 11, and a limiting member 14 is fixedly connected to the upper end of at least one guide rod 13;

[0044] The elastic member 12 is at least one spring sleeved on the corresponding guide rod 13, and the two ends of the spring respectively abut against the connection frame 11 and the connection seat 10.

[0045] Other common elastic parts can also be used for the elastic member 12, such as tension springs, torsion springs, metal shrapnel, etc.

[0046] The installation mechanism includes an adjustment plate 15 in close contact with the base 2 and a support frame fixedly installed on the adjustment plate 15 for assembling the noise sensor 6. At least one strip-shaped through groove 16 is provided through the adjustment plate 15. One end of the strip-shaped through groove 16 is close to the positioning tooling 3, and a locking bolt 17 threadedly connected to the base 2 and passing through the strip-shaped through groove 16 and having a head that can abut against the adjustment plate 15 is provided.

[0047] When the test requirements are different or it is necessary to test water pump bodies of different models, the distance between the noise sensor 6 and the water pump body can be adjusted. Loosen the locking bolt 17 so that the head of the locking bolt 17 is separated from the adjusting plate 15. At this time, the adjusting plate 15 can move closer to or away from the positioning tooling 3, thereby adjusting the distance between the noise sensor 6 and the water pump body. Then tighten the locking bolt 17 to fix the position of the noise sensor 6.

[0048] An installation base 18 is fixedly installed on the base 2. A number of threaded holes are recessed on the installation base 18. Installation holes matching the corresponding threaded holes are penetrated on the positioning tooling 3. An installation bolt 19 that passes through the installation hole and whose head can abut against the positioning tooling 3 is threadedly connected to the threaded hole.

[0049] When it is necessary to replace the positioning tooling 3, loosen and remove all the installation bolts 19. The positioning tooling 3 can be separated from the installation base 18. Then place other positioning tooling 3 on the installation base 18 and install the installation bolts 19 through the corresponding installation holes on the threaded holes.

[0050] A defective product chute 20 is provided on the machine body 1 below the test unit.

[0051] When the water pump body fails the test, the tester removes the water pump body and puts it into the defective product chute 20, which is convenient for collecting defective products.

[0052] An oscilloscope for detecting the current passing through when the water pump body runs without load is provided inside the machine body 1.

[0053] The oscilloscope is an existing mature technology. Through the oscilloscope, the current when the water pump body runs can be detected. By presetting the current threshold in the industrial control computer, the industrial control computer can also judge the current abnormality.

[0054] A wire passing through groove 21 is penetrated on the outer wall of the sound insulation box 7.

[0055] The wire passing through groove 21 allows various connecting wires, power cords, connecting pipes, etc. to pass through.

[0056] The preferred embodiments of the present invention have been described in detail above with reference to the drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept scope of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0057] In addition, it should be noted that each of the specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present utility model will not separately describe various possible combinations.

[0058] In addition, any combination can be made between various different embodiments of the present utility model, as long as it does not violate the idea of the present utility model, it should equally be regarded as the content disclosed by the present utility model.

Claims

1. A no-load test device for a water pump, characterized in that, Including: A machine body (1) and a test unit assembled on the machine body (1), the test unit including a base (2), a positioning tooling (3) for detachably assembling the water pump body on the base (2), a vertical moving mechanism (4) assembled on the base (2), and a vibration sensor (5) assembled on the output end of the vertical moving mechanism (4) through an elastic connection mechanism and capable of pressing on the water pump body.

2. The water pump no-load test equipment according to claim 1, characterized in that The test unit further includes a noise sensor (6) assembled on the base (2) through a mounting mechanism and facing the water pump body.

3. The no-load test device for a water pump according to claim 2, wherein The test unit further includes a sound insulation box body (7), a sound insulation cover (8) hinged to the top opening end of the sound insulation box body (7), and at least one first cylinder (9) hinged to the outer wall of the sound insulation box body (7) and with the piston end hinged to the sound insulation cover (8), and the base (2) is assembled inside the sound insulation box body (7).

4. The water pump no-load testing device according to claim 1, characterized in that The elastic connection mechanism includes a connection seat (10) fixedly connected to the output end of the vertical moving mechanism (4), a connection frame (11) located below the connection seat (10) and vertically slidably connected to the connection seat (10), and an elastic member (12) for pushing the connection frame (11) to slide downward, and the vibration sensor (5) is assembled on the connection frame (11).

5. The water pump no-load testing device according to claim 4, characterized in that, A plurality of guide rods (13) vertically sliding through the connection seat (10) are fixedly connected to the connection frame (11), and a limiting member (14) is fixedly connected to the upper end of at least one guide rod (13); The elastic member (12) is at least one spring sleeved on the corresponding guide rod (13), and the two ends of the spring respectively abut against the connection frame (11) and the connection seat (10).

6. The water pump no-load test equipment according to claim 2, wherein, The mounting mechanism includes an adjusting plate (15) in close contact with the base (2) and a support frame for assembling the noise sensor (6) fixedly installed on the adjusting plate (15). At least one strip-shaped through groove (16) is penetrated through the adjusting plate (15), one end of the strip-shaped through groove (16) is arranged close to the positioning tooling (3), and a locking bolt (17) threaded on the base (2) and passing through the strip-shaped through groove (16) and with the head capable of abutting against the adjusting plate (15) is provided.

7. The water pump no-load testing device according to claim 1, characterized in that, An installation base (18) is fixedly installed on the base (2), a plurality of threaded holes are recessed in the installation base (18), installation holes matching the corresponding threaded holes are penetrated through the positioning tooling (3), and installation bolts (19) threaded on the threaded holes and passing through the installation holes and with the heads capable of abutting against the positioning tooling (3) are provided.

8. The water pump no-load test equipment according to claim 1, wherein, A defective product slideway (20) is arranged on the machine body (1) and located below the test unit.

9. The water pump no-load test equipment according to claim 1, characterized in that, An oscilloscope for detecting the passing current when the water pump body runs without load is arranged inside the machine body (1).

10. The water pump no-load test equipment according to claim 3, characterized in that, A wire passing through groove (21) is penetrated through the outer wall of the sound insulation box body (7).

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