Device for testing flow-pressure drop characteristic of filter

Abstract

The utility model discloses a filter flow-pressure drop characteristic testing device, which relates to the filter performance detection field and comprises an oil tank, a high-viscosity pump, a temperature control box, a flow adjusting mechanism and a filter, the high-viscosity pump, the flow adjusting mechanism and the filter are all arranged on an oil inlet and return pipe of the oil tank, the oil tank is arranged in the temperature control box, and the temperature control box is arranged in the oil tank. A pressure difference sensor for detecting the pressure drop of the filter is arranged on an oil inlet and return pipe of the oil tank; the closed temperature control box is used for adjusting and controlling the temperature of oil in the oil tank, the temperature adjusting range is wider, the lower temperature can be achieved, the high-viscosity pump is arranged in a matched mode, the device can be matched with oil with the viscosity increased in the low-temperature environment, and the testing range of the whole device is wider.

Description

Technical Field

[0001] The utility model relates to the field of filter performance detection, in particular to a filter flow-pressure drop characteristic testing device. Background Art

[0002] Cars are one of the indispensable means of transportation in modern society. The main task of the filter in a car is to filter out pollutants in the oil, such as particulate matter, metal debris and other impurities, to ensure that the oil remains clean before flowing to various components. If there are a large number of impurities in the oil, it will cause component wear, performance degradation and even failure, so the performance evaluation of the filter is very important.

[0003] The flow-pressure drop characteristic test is the main method for evaluating the performance of filters. Its main purpose is to evaluate the performance of filters under different flow conditions, that is, the pressure drop of oil filters under different flow conditions. Currently, there are few test benches for testing the flow-pressure drop characteristic of filters. The oil tank of traditional filter flow-pressure drop characteristic test benches is exposed to the external environment. Even with a temperature control device, it cannot reach a lower temperature and cannot adapt to transmission filters that require low-temperature testing. The temperature control range is small and cannot meet customer needs.

[0004] Therefore, people are in urgent need of a filter flow-pressure drop characteristic testing device with a large temperature adjustment range and a wide test range. Summary of the invention

[0005] The utility model aims to provide a filter flow-pressure drop characteristic test device, which utilizes a temperature control box to control the oil temperature and cooperates with a high viscosity pump to improve the temperature adjustment range and the test range.

[0006] To achieve the above-mentioned purpose, the utility model provides the following solution: The utility model provides a test device for the flow-pressure drop characteristics of a filter, comprising a fuel tank, a high-viscosity pump, a temperature control box, a flow regulating mechanism and a filter, wherein the high-viscosity pump, the flow regulating mechanism and the filter are all arranged on the oil inlet and return pipes of the fuel tank, the fuel tank is arranged in the temperature control box, and a pressure differential sensor for detecting the pressure drop of the filter is arranged on the oil inlet and return pipes of the fuel tank.

[0007] Preferably, the filter flow-pressure drop characteristic testing device also includes a circulation pipeline, one end of which is connected to the oil inlet and return pipes at the oil outlet end of the high-viscosity pump, and the other end is connected to the oil tank, and a bypass valve is provided on the circulation pipeline.

[0008] Preferably, the flow regulating mechanism comprises a flow regulating valve and a flow meter, and the flow regulating valve and the flow meter are sequentially arranged along the flow direction of the oil inlet and return pipes.

[0009] Preferably, the filter is arranged in the temperature control box.

[0010] Preferably, a coarse filter is provided on the oil inlet and return pipes between the high viscosity pump and the oil tank.

[0011] Preferably, a first thermometer for detecting the oil temperature is provided in the oil tank.

[0012] Preferably, a second thermometer for detecting the oil temperature is provided on the oil inlet and return pipes of the oil tank, and a detection point of the second thermometer is located outside the temperature control box.

[0013] Preferably, the first thermometer, the second thermometer and the display of the differential pressure sensor are all located outside the temperature control box.

[0014] Preferably, the oil tank is detachably connected to the oil inlet and return pipes.

[0015] Compared with the prior art, the utility model mainly achieves the following technical effects:

[0016] A closed temperature control box is used to control the temperature of the oil in the tank. The temperature adjustable range is wider and can reach lower temperatures, which is suitable for the test of transmission filters. In addition, the setting of a high-viscosity pump can adapt to oil with increased viscosity in low temperature environments, making the test range of the overall device wider.

[0017] Compared with the prior art, other solutions of the utility model have achieved the following technical effects:

[0018] The cooperation of the first thermometer and the second thermometer can ensure the accuracy of the oil temperature.

[0019] The oil tank's chamber setting can hold different oils, improving the convenience of switching test oils. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a structural schematic diagram of a test device for the flow-pressure drop characteristics of a filter of the utility model;

[0022] Figure 2 It is a structural schematic diagram of another layout mode of the oil inlet and return pipes of the test device for the filter flow-pressure drop characteristics of the utility model;

[0023] Among them, 1. Oil tank; 2. High viscosity pump; 3. Flow regulating valve; 4. Flow meter; 5. First thermometer; 6. Second thermometer; 7. Bypass valve; 8. Pressure difference sensor; 9. Suction filter; 10. Filter press; 11. Coarse filter; 12. Temperature control box. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0025] The utility model aims to provide a filter flow-pressure drop characteristic test device, which utilizes a temperature control box to control the oil temperature and cooperates with a high viscosity pump to improve the temperature adjustment range and the test range.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] Please refer to Figures 1-2 As shown, a test device for the flow-pressure drop characteristics of a filter is provided, comprising a fuel tank 1, a high-viscosity pump 2, a temperature control box 12, a flow regulating mechanism and a filter. The high-viscosity pump 2, the flow regulating mechanism and the filter are all arranged on the inlet and return oil pipes of the fuel tank 1. The fuel tank 1 is arranged in the temperature control box 12. The temperature control box 12 is a closed structure. The position where the inlet and return oil pipes pass through is sealed to reduce the heat exchange between the inside and the outside, save energy, and at the same time, the temperature can be adjusted in a wider range to reach a lower temperature. In addition, the setting of the high-viscosity pump 2 can adapt to the oil with increased viscosity in a low temperature environment, so that the test range of the overall device is wider. A differential pressure sensor 8 for detecting the filter pressure drop is arranged on the inlet and return oil pipes of the fuel tank 1.

[0028] The filter includes two types: a suction filter 9 and a pressure filter 10. There are certain differences in the setting positions of the two types and the settings of the corresponding differential pressure sensor 8. When the filter uses the suction filter 9, the suction filter 9 is set at the oil inlet port of the oil inlet and return pipes. At this time, one pressure sensing end of the differential pressure sensor 8 is connected to the oil inlet and return pipes between the suction filter 9 and the high-viscosity pump 2, and the other pressure sensing end is connected to the atmosphere; when the filter uses the pressure filter 10, the pressure filter 10 is set on the oil inlet and return pipes behind the flow regulating mechanism. At this time, the two pressure sensing ends of the differential pressure sensor 8 are respectively connected to the oil inlet and return pipes at the front and rear ends of the pressure filter 10.

[0029] The oil tank 1 is a box body with a detachable top cover, which is convenient for installing the suction filter 9 after removing the top cover.

[0030] An additional circulation pipeline is provided, one end of which is connected to the oil inlet and return pipes at the oil outlet end of the high-viscosity pump 2, and the other end is connected to the oil tank 1. A bypass valve 7 is provided on the circulation pipeline. By closing the flow regulating mechanism and opening the bypass valve 7 and the high-viscosity pump 2, the high-viscosity pump 2 can pump oil into the circulation pipeline, and the oil in the circulation pipeline eventually flows into the oil tank 1 to complete the circulation. At the same time, the oil is pumped and discharged to disturb the oil in the oil tank 1 to improve its temperature uniformity. The connecting end of the circulation pipeline and the oil tank 1 is located between the oil inlet port and the oil return port of the oil inlet and return pipes.

[0031] The flow regulating mechanism includes a flow regulating valve 3 and a flow meter 4, which are arranged in sequence along the flow direction of the inlet and return oil pipes. The flow regulating valve 3 is used to regulate the flow, and the flow meter 4 is used to monitor the flow.

[0032] The filter is arranged in the temperature control box 12, so that the test is more realistic and the accuracy of the test is improved.

[0033] A coarse filter 11 is provided on the oil inlet and return pipes between the high viscosity pump 2 and the oil tank 1. The coarse filter 11 performs coarse filtering on the oil to prevent large particles of impurities from entering the high viscosity pump 2 and the flow meter 4 and causing them to malfunction.

[0034] A first thermometer 5 is provided in the oil tank 1 to monitor the oil in the oil tank 1 in real time.

[0035] A second thermometer 6 is provided on the oil inlet and return pipes of the oil tank 1. The detection point of the second thermometer 6 is located outside the temperature control box 12. The second thermometer 6 is used to monitor the temperature of the oil in the pipeline outside the temperature control box 12. The first thermometer 5 and the second thermometer 6 cooperate to ensure the accuracy of the oil temperature and prevent the problem of unstable and inaccurate oil temperature due to uneven mixing of the oil or the influence of the temperature of the pipeline outside the temperature control box 12 during initial circulation.

[0036] The display meters of the first thermometer 5 , the second thermometer 6 and the differential pressure sensor 8 are all located outside the temperature control box 12 to prevent excessively low temperatures in the temperature control box 12 from affecting the normal operation of the display meters.

[0037] Since it may be necessary to replace different transmission oils when testing the transmission filter, a detachable connection can be set between the oil tank 1 and the oil inlet and return pipes. The detachable connection can be as follows: a through hole matching the oil inlet and return pipes is opened on the oil tank 1, and the oil inlet and return pipes are directly plugged in and out of the oil tank 1, or a corresponding joint is provided on the oil tank 1, and the end of the joint away from the oil inlet and return pipes extends into the oil tank 1, and the oil inlet and return pipes are sleeved on the joint, etc.; when the transmission oil needs to be replaced, the oil tank 1 is disconnected from the oil inlet and return pipes, and the temperature control box 12 is opened to replace the oil tank 1 carrying different oils, thereby improving the convenience of switching the test oil.

[0038] In this embodiment, the filter, the pressure difference sensor 8, the coarse filter 11, the high viscosity pump 2, the bypass valve 7, the flow regulating valve 3, the flow meter 4, the first thermometer 5 and the second thermometer 6 are all connected to the pipeline through a clamp to improve the convenience of disassembly.

[0039] The oil inlet port of the oil inlet-return pipe can be vertically inserted into the oil tank 1 from the top of the oil tank 1 , or connected to the inner cavity of the oil tank 1 from the bottom of the oil tank 1 .

[0040] When actually testing the filter flow-pressure drop characteristic, install the required test type filter and the differential pressure sensor 8, use the temperature control box 12 to control the oil temperature in the oil tank 1, and use the high viscosity pump 2 and the circulation pipeline to disturb the oil in the oil tank 1 during the control process; after the temperature control is completed, close the bypass valve 7, start the high viscosity pump 2 again or maintain the continuous operation of the high viscosity pump 2 in step S1, and adjust the flow of the inlet and return oil pipes through the flow regulating mechanism, observe the values ​​of the first thermometer 5 and the second thermometer 6, and wait until the temperature displayed after it stabilizes is the accurate temperature, and then start the test; observe the value of the differential pressure sensor 8 to obtain the filter flow-pressure drop characteristic.

[0041] A single test tests only one type of filter.

[0042] Adaptive changes made according to actual needs are all within the protection scope of this utility model.

[0043] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0044] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A filter flow-pressure drop characteristic testing device, characterized in that: It includes an oil tank, a high viscosity pump, a temperature control box, a flow regulating mechanism and a filter. The high viscosity pump, the flow regulating mechanism and the filter are all arranged on the oil inlet and return pipes of the oil tank. The oil tank is arranged in the temperature control box. A pressure differential sensor for detecting the pressure drop of the filter is arranged on the oil inlet and return pipes of the oil tank.

2. The filter flow-pressure drop characteristic testing device according to claim 1, characterized in that: The filter flow-pressure drop characteristic testing device also includes a circulation pipeline, one end of which is connected to the oil inlet and return pipes at the oil outlet end of the high viscosity pump, and the other end is connected to the oil tank. A bypass valve is provided on the circulation pipeline.

3. The filter flow-pressure drop characteristic testing device according to claim 1, characterized in that: The flow regulating mechanism comprises a flow regulating valve and a flow meter, and the flow regulating valve and the flow meter are arranged in sequence along the flow direction of the oil inlet and return pipes.

4. The filter flow-pressure drop characteristic testing device according to claim 1, characterized in that: The filter is arranged in the temperature control box.

5. The filter flow-pressure drop characteristic testing device according to claim 1, characterized in that: A coarse filter is provided on the oil inlet and return pipes between the high viscosity pump and the oil tank.

6. The filter flow-pressure drop characteristic testing device according to claim 1, characterized in that: A first thermometer for detecting the temperature of the oil is arranged in the oil tank.

7. The filter flow-pressure drop characteristic testing device according to claim 6, characterized in that: A second thermometer for detecting the oil temperature is arranged on the oil inlet and return pipes of the oil tank, and a detection point of the second thermometer is located outside the temperature control box.

8. The filter flow-pressure drop characteristic testing device according to claim 7, characterized in that: The first thermometer, the second thermometer and the display meter of the differential pressure sensor are all located outside the temperature control box.

9. The filter flow-pressure drop characteristic testing device according to claim 1, characterized in that: The oil tank is detachably connected to the oil inlet and return pipes.

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