Electronic water pump locked-rotor testing device

Abstract

The utility model relates to the technical field of electronic water pumps, and particularly discloses an electronic water pump locked-rotor testing device which comprises an output pump and a proportional valve, the output pump can pump a testing medium, the testing medium is a liquid medium or a gas medium, and an inlet of the proportional valve is connected with an outlet of the output pump through a pipeline. An outlet of the proportional valve is connected with a water pump outlet of the electronic water pump through a pipeline; the proportional valve is used for adjusting the flow of the test medium entering the water pump outlet. The test medium is pumped by the output pump, and the flow of the test medium entering the water pump outlet of the electronic water pump is adjusted by the proportional valve, so that the electronic water pump is in a locked-rotor state or the current of the electronic water pump reaches the maximum value, and the locked-rotor test is completed on the premise that the electronic water pump is not damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic water pumps, in particular to an electronic water pump stall testing device. Background Art

[0002] With the continuous expansion of the application field of electronic water pumps, the structure of electronic water pumps is also developing towards miniaturization and integration. The outlet and inlet of existing electronic water pumps are often laser welded. When performing a stall test, the outlet and inlet of the electronic water pump cannot be disassembled, resulting in the inability to use a coupling test to perform a stall test without damaging the product. Utility Model Content

[0003] The utility model aims to provide an electronic water pump stall test device, so as to realize the stall test of the electronic water pump without damaging the product.

[0004] The utility model provides an electronic water pump stall test device, which is used for performing a stall test on the electronic water pump. The electronic water pump is provided with a water pump outlet. The electronic water pump stall test device comprises an output pump and a proportional valve. The output pump can pump a test medium, and the test medium is a liquid medium or a gas medium. The inlet of the proportional valve is connected with the outlet of the output pump, and the outlet of the proportional valve is connected with the water pump outlet of the electronic water pump. The proportional valve is used for adjusting the flow of the test medium entering the water pump outlet.

[0005] As a preferred technical solution for the electronic water pump stall test device, the output pump is an air pump, which is used to pump gaseous media.

[0006] As a preferred technical solution for the electronic water pump stall test device, it also includes a storage tank and a pressure gauge. The storage tank is arranged upstream of the proportional valve, the outlet of the storage tank is connected to the inlet of the proportional valve, the inlet of the storage tank is connected to the outlet of the air pump, the storage tank is used to store the gas medium, the pressure gauge is connected to the storage tank, and the pressure gauge is used to measure the pressure of the gas medium in the storage tank.

[0007] As a preferred technical solution for the electronic water pump stall test device, it also includes a medium processor, which is arranged upstream of the storage tank, the outlet of the medium processor is connected to the inlet of the storage tank, the inlet of the medium processor is connected to the outlet of the air pump, and the medium processor is used to filter impurities and moisture in the gas medium.

[0008] As a preferred technical solution for the electronic water pump stall test device, it also includes a preprocessor, which is arranged at the inlet of the air pump. The preprocessor is used to filter impurities in the gas medium entering the air pump. The filtering accuracy of the preprocessor is lower than the filtering accuracy of the medium processor.

[0009] As a preferred technical solution for the electronic water pump stall test device, the output pump is a hydraulic pump, which is used to pump liquid media.

[0010] As a preferred technical solution for the electronic water pump stall test device, it also includes a storage tank and a pressure gauge. The storage tank is arranged upstream of the proportional valve, the outlet of the storage tank is connected to the inlet of the proportional valve, the inlet of the storage tank is connected to the outlet of the hydraulic pump, the storage tank is used to store liquid medium, the pressure gauge is connected to the storage tank, and the pressure gauge is used to measure the pressure of the liquid medium in the storage tank.

[0011] As a preferred technical solution for the electronic water pump stall test device, it also includes a medium processor, which is arranged upstream of the storage tank, the outlet of the medium processor is connected to the inlet of the storage tank, the inlet of the medium processor is connected to the outlet of the hydraulic pump, and the medium processor is used to filter impurities in the liquid medium.

[0012] As a preferred technical solution for the electronic water pump stall test device, it also includes a preprocessor, which is arranged at the inlet of the hydraulic pump. The preprocessor is used to filter impurities in the liquid medium entering the hydraulic pump. The filtering accuracy of the preprocessor is lower than the filtering accuracy of the medium processor.

[0013] The beneficial effects of the utility model are:

[0014] The utility model provides an electronic water pump stall test device, which pumps a test medium through an output pump, and adjusts the flow of the test medium entering the water pump outlet of the electronic water pump through a proportional valve, so that the electronic water pump is in a stalled state or the current of the electronic water pump reaches a maximum value, thereby completing the stall test without damaging the electronic water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a plan view of the electronic water pump stall test device in the first embodiment of the utility model;

[0016] Figure 2 A schematic diagram of the flow direction of the test medium and the rotation direction of the impeller of the electronic water pump in the embodiment of the utility model;

[0017] Figure 3 It is a plan view of the electronic water pump stall test device in the second embodiment of the utility model.

[0018] In the figure:

[0019] 100, electronic water pump; 110, water pump outlet;

[0020] 11. Air pump; 12. Hydraulic pump; 2. Medium processor; 3. Pressure gauge; 4. Storage tank; 5. Proportional valve. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solution of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] Embodiment 1

[0026] like Figure 1-Figure 2As shown, the utility model provides an electronic water pump stall test device, which is used to perform a stall test on an electronic water pump 100. The electronic water pump 100 includes a housing, and a water pump inlet and a water pump outlet 110 are provided on the housing by laser welding. An impeller is provided inside the housing. When the electronic water pump 100 operates normally, water enters the housing through the water pump inlet, and is pressurized under the action of the impeller and discharged from the water pump outlet 110. When the electronic water pump 100 is stalled for some reason, the impeller cannot rotate, and water cannot be discharged from the water pump outlet 110, and the electronic water pump 100 reaches a stall state. When the electronic water pump 100 with a stall protection function is in a stall state, the stall protection is triggered, and the power is reduced or the operation is stopped to avoid burning caused by excessive current. After the electronic water pump 100 without a stall protection function is in a stall state, its current value rises rapidly and reaches a maximum value. The electronic water pump stall test device provided in this embodiment can perform a stall test on the above-mentioned two types of electronic water pumps 100 without damaging the structure of the electronic water pump 100.

[0027] like Figure 1-Figure 2 As shown, the electronic water pump stall test device includes an output pump and a proportional valve 5, and the output pump can pump a test medium, and the test medium is a liquid medium or a gas medium, such as water or compressed air. The inlet of the proportional valve 5 is connected to the outlet of the output pump, and the outlet of the proportional valve 5 is connected to the water pump outlet 110 of the electronic water pump 100, and the proportional valve 5 is used to adjust the flow of the test medium entering the water pump outlet 110. In order to avoid the situation where the output flow of the output pump is unstable and the electronic water pump 100 cannot reach the stall state, the power of the output pump is increased, and the flow of the test medium pumped to the water pump outlet 110 is kept stable by adjusting the proportional valve 5, so as to ensure that the electronic water pump 100 can reach the stall state. When the electronic water pump 100 is subjected to a stall test, the output pump pumps the test medium to the water pump outlet 110, and adjusts the flow of the test medium through the proportional valve 5, so that the electronic water pump 100 reaches the stall state, and measures whether the stall protection can be triggered after the stall and the current value after the stall through the host computer of the electronic water pump 100. The host computer of the electronic water pump 100 is the prior art in the art, and the related measurement method is not described here in detail as the prior art in the art.

[0028] Specifically, when the test medium pumped by the output pump is a liquid medium, the electronic water pump 100 is placed in water and powered on, and the liquid medium pumped by the output pump flows along the Figure 1 and Figure 2 The water in the electronic water pump 100 flows along the rotation direction of the impeller. Figure 2The liquid flows along the path S2 in the electronic water pump 100 and is collected at the water pump outlet 110 of the electronic water pump 100. Since the flow directions of the two are opposite, when the flow rate of the liquid medium pumped by the output pump is equal to the flow rate of the water pumped by the electronic water pump 100, the electronic water pump 100 reaches a stalled state. Similarly, when the test medium pumped by the output pump is a gas medium, the electronic water pump 100 is placed in the air and powered on. The gas medium pumped by the delivery pump flows along the path S1, and the air in the electronic water pump 100 flows along the impeller rotation direction, that is, the path S2. When the flow rate of the gas medium pumped by the output pump is equal to the flow rate of the air pumped by the electronic water pump 100, the electronic water pump 100 also reaches a stalled state.

[0029] In order to reduce the limitation of the electronic water pump stall test device on the use scenario, in this embodiment, the test medium pumped by the output pump is preferably a gas medium. The corresponding output pump is set as an air pump 11, and the air pump 11 is used to pump the gas medium.

[0030] like Figure 1 As shown, the electronic water pump stall test device also includes a storage tank 4 and a pressure gauge 3. The storage tank 4 is arranged upstream of the proportional valve 5. The outlet of the storage tank 4 is connected to the inlet of the proportional valve 5, and the inlet of the storage tank 4 is connected to the outlet of the air pump 11. The storage tank 4 is preferably a gas storage tank, and is used to store the gas medium. The setting of the storage tank 4 can buffer the flow fluctuation of the gas medium pumped by the air pump 11, so that the flow of the gas medium entering the water pump outlet 110 after passing through the proportional valve 5 remains stable, so that the air pump 11 does not need to increase its operating power additionally. The pressure gauge 3 is connected to the storage tank 4 and is used to measure the pressure of the gas medium in the storage tank 4. The power of the air pump 11 is adjusted or the air pump 11 is controlled to be turned on or off according to the indication of the pressure gauge 3.

[0031] Furthermore, if Figure 1 As shown, the electronic water pump stall test device also includes a medium processor 2, which is arranged upstream of the storage tank 4, and the outlet of the medium processor 2 is connected to the inlet of the storage tank 4, and the inlet of the medium processor 2 is connected to the outlet of the air pump 11. The medium processor 2 is used to filter impurities and moisture in the gas medium, so that the gas medium entering the water pump outlet 110 remains clean and dry. The medium processor 2 is arranged upstream of the storage tank 4, and the pressure loss generated by the medium processor 2 in the process of filtering and drying the gas medium is also buffered by the storage tank 4, so as not to affect the flow of the gas medium entering the water pump outlet 110. The medium processor 2 in this embodiment is preferably a combination of a filter and a dryer, the filter is located upstream of the dryer, the filter is used to filter impurities in the gas medium, and the dryer is used to adsorb water vapor in the gas medium. The filter and the dryer can be selected from the structures in the prior art, and no specific limitation is made here.

[0032] Optionally, the electronic water pump 100 test device further includes a preprocessor (not shown in the figure), which is arranged at the inlet of the air pump 11 and is used to filter impurities in the gas medium entering the air pump 11. The filtering accuracy of the preprocessor is less than the filtering accuracy of the medium processor 2. The preprocessor in this embodiment is preferably a filter, which is used to filter impurities in the gas medium entering the air pump 11, and its filtering accuracy is less than the filtering accuracy of the filter of the medium processor 2. The cleanliness of the gas medium is ensured by the two-stage filtration set by the preprocessor and the medium processor 2.

[0033] Embodiment 2

[0034] like Figure 3 As shown, in this embodiment, the case where the medium pumped by the output pump is a liquid medium will be described, and the corresponding output pump is set as a hydraulic pump 12, and the hydraulic pump 12 is used to pump the liquid medium.

[0035] Furthermore, if Figure 3 As shown, the electronic water pump stall test device also includes a storage tank 4 and a pressure gauge 3. The storage tank 4 is arranged upstream of the proportional valve 5. The outlet of the storage tank 4 is connected to the inlet of the proportional valve 5, and the inlet of the storage tank 4 is connected to the outlet of the hydraulic pump 12. The storage tank 4 is preferably a liquid storage tank, and is used to store liquid medium. The setting of the storage tank 4 can buffer the flow fluctuation of the liquid medium pumped by the hydraulic pump 12, so that the flow of the liquid medium entering the water pump outlet 110 after passing through the proportional valve 5 remains stable, so that the hydraulic pump 12 does not need to increase its operating power. The pressure gauge 3 is connected to the storage tank 4 and is used to measure the pressure of the liquid medium in the storage tank 4. The power of the hydraulic pump 12 is adjusted or the hydraulic pump 12 is controlled to be turned on or off according to the indication of the pressure gauge 3.

[0036] Furthermore, if Figure 3 As shown, the electronic water pump stall test device also includes a medium processor 2, which is arranged upstream of the storage tank 4, and the outlet of the medium processor 2 is connected to the inlet of the storage tank 4, and the inlet of the medium processor 2 is connected to the outlet of the hydraulic pump 12. The medium processor 2 is used to filter impurities in the liquid medium so that the liquid medium entering the water pump outlet 110 remains clean. The medium processor 2 is arranged upstream of the storage tank 4, and the pressure loss generated by the medium processor 2 in the process of filtering the liquid medium is also buffered by the storage tank 4, so as not to affect the flow rate of the liquid medium entering the water pump outlet 110. The medium processor 2 in this embodiment is preferably a filter, and the filter is used to filter impurities in the liquid medium. The filter can select a structure in the prior art, and no specific limitation is made here.

[0037] Optionally, the electronic water pump 100 test device further includes a preprocessor (not shown in the figure), which is arranged at the inlet of the hydraulic pump 12 and is used to filter impurities in the liquid medium entering the hydraulic pump 12. The filtering accuracy of the preprocessor is less than the filtering accuracy of the medium processor 2. The preprocessor in this embodiment is preferably a filter, which is used to filter impurities in the liquid medium entering the hydraulic pump 12, and its filtering accuracy is less than the filtering accuracy of the filter of the medium processor 2. The cleanliness of the liquid medium is ensured by the two-stage filtration set by the preprocessor and the medium processor 2.

[0038] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An electronic water pump stall test device, used for performing a stall test on an electronic water pump (100), wherein the electronic water pump (100) is provided with a water pump outlet (110), characterized in that: The electronic water pump stall test device comprises: an output pump, the output pump being capable of pumping a test medium, the test medium being a liquid medium or a gaseous medium; A proportional valve (5), wherein the inlet of the proportional valve (5) is connected to the outlet of the output pump, and the outlet of the proportional valve (5) is connected to the water pump outlet (110) of the electronic water pump (100), and the proportional valve (5) is used to adjust the flow of the test medium entering the water pump outlet (110).

2. The electronic water pump stall test device according to claim 1, characterized in that: The output pump is an air pump (11), and the air pump (11) is used to pump the gas medium.

3. The electronic water pump stall test device according to claim 2, characterized in that: It also includes a storage tank (4) and a pressure gauge (3), wherein the storage tank (4) is arranged upstream of the proportional valve (5), the outlet of the storage tank (4) is connected to the inlet of the proportional valve (5), the inlet of the storage tank (4) is connected to the outlet of the air pump (11), the storage tank (4) is used to store the gas medium, the pressure gauge (3) is connected to the storage tank (4), and the pressure gauge (3) is used to measure the pressure of the gas medium in the storage tank (4).

4. The electronic water pump stall test device according to claim 3, characterized in that: It also includes a medium processor (2), which is arranged upstream of the storage tank (4), the outlet of the medium processor (2) is connected to the inlet of the storage tank (4), the inlet of the medium processor (2) is connected to the outlet of the air pump (11), and the medium processor (2) is used to filter impurities and moisture in the gas medium.

5. The electronic water pump stall test device according to claim 4, characterized in that: It also includes a preprocessor, which is arranged at the inlet of the air pump (11) and is used to filter impurities in the gas medium entering the air pump (11). The filtering accuracy of the preprocessor is lower than the filtering accuracy of the medium processor (2).

6. The electronic water pump stall test device according to claim 1, characterized in that: The output pump is a hydraulic pump (12), and the hydraulic pump (12) is used to pump the liquid medium.

7. The electronic water pump stall test device according to claim 6, characterized in that: It also includes a storage tank (4) and a pressure gauge (3), wherein the storage tank (4) is arranged upstream of the proportional valve (5), the outlet of the storage tank (4) is connected to the inlet of the proportional valve (5), the inlet of the storage tank (4) is connected to the outlet of the hydraulic pump (12), the storage tank (4) is used to store the liquid medium, the pressure gauge (3) is connected to the storage tank (4), and the pressure gauge (3) is used to measure the pressure of the liquid medium in the storage tank (4).

8. The electronic water pump stall test device according to claim 7, characterized in that: It also includes a medium processor (2), which is arranged upstream of the storage tank (4), the outlet of the medium processor (2) is connected to the inlet of the storage tank (4), the inlet of the medium processor (2) is connected to the outlet of the hydraulic pump (12), and the medium processor (2) is used to filter impurities in the liquid medium.

9. The electronic water pump stall test device according to claim 8, characterized in that: It also includes a pre-processor, which is arranged at the inlet of the hydraulic pump (12) and is used to filter impurities in the liquid medium entering the hydraulic pump (12). The filtering accuracy of the pre-processor is lower than the filtering accuracy of the medium processor (2).

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