Supercharger test system with negative pressure function

Abstract

The supercharger testing system with the negative pressure function comprises an inlet, the inlet is connected to a negative pressure generator through a pipeline, and a flowmeter is arranged on the pipeline between the inlet and the negative pressure generator; the negative pressure generator is connected to a test object assembly table through a pipeline, the test object assembly table is used for assembling a supercharger, and the pipeline is provided with a first test pipe; the test object assembly table is further connected to the outlet valve through another pipeline, and a second test pipe is arranged on the pipeline; the device further comprises a control device which is in communication connection with the flow meter, the first test tube, the second test tube and the outlet valve and can carry out corresponding control operation. According to the supercharger testing system, the negative pressure generator is additionally arranged in the pipeline, the structure in the negative pressure generator can reduce the circulation area of the flow channel, namely, the passing gas flow is reduced, the function of generating negative pressure is achieved, and the working condition of the supercharger in the high-altitude negative pressure environment can be simulated.

Description

Technical Field

[0001] The invention belongs to the technical field of supercharger testing, and in particular relates to a supercharger testing system with a negative pressure function. Background Art

[0002] A supercharger is a device used to increase the intake pressure of an engine by compressing air or gas to increase the density of the intake air, thereby improving engine power and efficiency, such as the turbocharger used in automobiles.

[0003] The performance of a supercharger needs to be tested, typically by installing it on a dedicated test system. Existing supercharger test systems primarily assess compressor performance by measuring the pressure and temperature of the medium at the compressor inlet and outlet. Inlet conditions are typically close to standard atmospheric conditions. With the continued expansion of engine applications and their gradual application to drones, superchargers must be able to operate in high-altitude environments. High altitudes have low air pressure, creating a negative pressure compared to ground level, but existing test systems are unable to meet these negative pressure testing conditions.

[0004] Therefore, based on the above-mentioned existing problems, the present application further designs and improves the supercharger testing system. Summary of the Invention

[0005] In response to the above deficiencies in the prior art, the present invention provides a supercharger testing system with a negative pressure function, which adds a negative pressure generator and can generate a negative pressure effect as needed. The overall structure is simple, the operation is convenient, and the negative pressure size is easy to adjust.

[0006] The present invention is solved by the following technical solutions.

[0007] A supercharger testing system with a negative pressure function includes an inlet connected to a negative pressure generator via a pipeline, and a flow meter is provided on the pipeline between the inlet and the negative pressure generator; the negative pressure generator is connected to a test object assembly platform via a pipeline, the test object assembly platform is used to assemble the supercharger, and a first test tube is provided on this section of the pipeline; the test object assembly platform is also connected to an outlet valve via another pipeline, and a second test tube is provided on this section of the pipeline; and the control device is also included. The control device is communicatively connected to the flow meter, the first test tube, the second test tube, and the outlet valve, and can perform corresponding control operations.

[0008] The supercharger testing system in this application adds a negative pressure generator in the pipeline. The structure in the negative pressure generator can increase the gas flow resistance in the flow channel to achieve the function of generating negative pressure, and can simulate the working conditions of the supercharger in a high-altitude negative pressure environment.

[0009] In a preferred embodiment, the negative pressure generator is connected to a pressure sensor controller, and its signal is connected to the flow meter or the pipeline of the inlet section.

[0010] In a preferred embodiment, the negative pressure generator is an adjustable negative pressure generator with a variable flow surface, which facilitates adjusting the negative pressure as needed.

[0011] In a preferred embodiment, the negative pressure generator includes a first movable seat and a second movable seat, wherein the first movable seat is provided with a plurality of curved panels arranged in an array, with gaps between adjacent curved panels; the second movable seat includes two side panels arranged opposite to each other, with a plurality of partitions provided between the two side panels; the first movable seat can be moved into the flow channel to reduce the flow area of ​​the flow channel; the second movable seat can be moved toward the first movable seat and the partitions can be inserted into the gaps to adjust the flow area of ​​the flow channel in order to stabilize the negative pressure. In this structure, after the first movable seat is placed in the pipeline flow channel, it can reduce the negative pressure generated in the flow area. During operation, after the required negative pressure conditions are set, the second movable seat can move up or down according to the flow rate, thereby adjusting the channel structure in real time to form a corresponding stable negative pressure.

[0012] In a preferred embodiment, the first movable seat is provided with 6 to 10 gaps, and the second movable seat is provided with a corresponding number of partitions, so as to facilitate matching movement in and out, and the overall structural strength is high.

[0013] In a preferred embodiment, the coordinate system is established from the flow channel cross section, and the function of the curve of the curved surface a of the curved plate is y=a*x 2 +b*x+c. The second movable seat at the top adjusts the height of the x value in real time through the pressure actuator, thereby establishing a regular function of flow rate and channel area change.

[0014] In a preferred embodiment, the first test tube and the second test tube are both provided with a temperature sensor and a pressure sensor for acquiring temperature signals and pressure signals at the front and rear ends of the supercharger.

[0015] In a preferred embodiment, the first movable seat is pushed into the flow channel by a first pushing device, and the second movable seat is pushed by a second pushing device. In this structure, the pushing device can be a conventional telescopic pushing mechanism, such as a pneumatic / oil cylinder pushing device, a screw pushing device, etc.

[0016] Compared with the prior art, the present invention has the following beneficial effects: it provides a supercharger testing system with a negative pressure function, adds a negative pressure generator, can generate a negative pressure effect as needed, and has a simple overall structure, easy operation, and easy adjustment of the negative pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of module connections of the supercharger test system with negative pressure function in the present invention.

[0018] Figure 2 This is a cross-sectional coordinate diagram of the first movable seat of the negative pressure generator area in the present invention being placed in the flow channel area.

[0019] Figure 3 This is a simulated schematic diagram of the first movable seat and the second movable seat in the negative pressure generator area of ​​the present invention.

[0020] Figure 4 The first movable seat and the second movable seat in the present invention are assembled together to form a three-dimensional Figure 1 .

[0021] Figure 5 The first movable seat and the second movable seat in the present invention are assembled together to form a three-dimensional Figure 2 .

[0022] Figure 6 It is a three-dimensional diagram of the first movable seat in the present invention.

[0023] Figure 7 A reference diagram of a specific pneumatic valve actuator. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] In the following embodiments, the same or similar numbers throughout represent the same or similar components or elements with 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 are not to be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that the terms: center, longitudinal, transverse, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and therefore cannot be understood as limiting the present invention. In addition, the terms: first, second, etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present invention, unless otherwise clearly specified and limited, the terms: install, connect, connect, etc. should be understood in a broad sense, and ordinary technicians in this field can understand the specific meanings of the above terms in this application according to the specific circumstances.

[0027] The current difficulty in supercharger testing lies in the fact that compressor map operating conditions involve variations in flow rate and speed. Given the large variations in test conditions, which occur over a short period of time, it's crucial to determine how to generate the required negative pressure in the air, and how to maintain consistent negative pressure at varying test flow rates. To address these challenges, the present application proposes the following technical solutions.

[0028] See also Figures 1 to 7 The present application relates to a supercharger testing system with a negative pressure function. The testing system includes an inlet, which is connected to a negative pressure generator through a pipeline, and a flow meter is provided on the pipeline between the inlet and the negative pressure generator; the negative pressure generator is connected to a test object assembly platform through a pipeline, and the test object assembly platform is used to assemble the supercharger, and a first test tube is provided on this section of the pipeline; the test object assembly platform is also connected to an outlet valve through another pipeline, and a second test tube is provided on this section of the pipeline; the control device is also included, which is communicatively connected to the flow meter, the first test tube, the second test tube, and the outlet valve, and can perform corresponding control operations; the control device can be a computer program terminal, which is used to perform test operations and collect and analyze data.

[0029] It can also be seen from the accompanying drawings that the negative pressure generator is connected to a pressure sensor controller, and the signal is connected to the flow meter or the pipeline of the inlet section; the pressure sensor controller is used to control the gas flow resistance in the negative pressure generator according to the change in flow rate, so as to ensure the stability of the negative pressure state under different flow rates.

[0030] In the present application, the negative pressure generator is an adjustable negative pressure generator with a variable flow surface, which is convenient for adjusting the negative pressure as needed. In a specific embodiment, the negative pressure generator includes a first movable seat 1 and a second movable seat 2. The first movable seat 1 is provided with a plurality of curved panels 11 arranged in an array, with gaps 12 between adjacent curved panels 11; the second movable seat 2 includes two side panels 22 arranged opposite to each other, with a plurality of partitions 21 provided between the two side panels 22; the first movable seat 1 can be moved into the flow channel to reduce the flow area of ​​the flow channel; the second movable seat 2 can be moved toward the first movable seat 1 and the partitions 21 can be inserted into the gaps 12 to adjust the flow area of ​​the flow channel to stabilize the negative pressure. In this structure, after the first movable seat 1 is placed in the pipeline flow channel, it can reduce the negative pressure generated in the flow area. During operation, after the required negative pressure conditions are set, the second movable seat 2 can move up or down according to the flow rate, thereby adjusting the size of the channel flow area in real time to form a corresponding stable negative pressure.

[0031] Furthermore, the first movable seat 1 is provided with 6 to 10 gaps 12, and the second movable seat 2 is provided with a corresponding number of partitions 21, facilitating coordinated movement in and out, while also providing a high degree of overall structural strength. Specifically, the first movable seat 1 is pushed into the flow channel by a first pushing device, while the second movable seat 2 is pushed by a second pushing device. In this structure, the pushing device can be a conventional telescopic pushing mechanism, such as a pneumatic / hydraulic cylinder pushing device, a screw pushing device, or the like.

[0032] In the present application, the first test tube and the second test tube are both provided with a temperature sensor and a pressure sensor for obtaining temperature signals and pressure signals at the front and rear ends of the supercharger.

[0033] For details, see Figure 2 and Figure 3 , Figure 2 The figure shows a cross-sectional view of the flow path in the negative pressure generator area. XY coordinates are established in this cross-sectional view. The gray area (slider) on the lower left is the area where the first movable seat 1 is moved in, and the upper right portion is the flow area through which gas can pass. In this figure, the function of the curve a (red curve) of the curved surface 11 is y=a*x 2 +b*x+c, according to the function characteristics, the second movable seat 2 at the top adjusts the height of the x value in real time through the pressure actuator, thereby adjusting the circulation area according to the flow size to form a stable negative pressure condition.

[0034] In this application, the pressure sensing controller is a commercially available pneumatic valve actuator. The pressure air intake on the pneumatic valve actuator is connected to the pipeline of the inlet section. According to the pressure change caused by the flow rate in the pipeline, the execution unit of the pneumatic valve actuator can control the up and down movement of the second movable seat 2, that is, it can adjust the flow area according to the flow rate to form a stable negative pressure condition. Figure 7 , is a picture of a pneumatic valve actuator, which has a pressure air intake port (upper right structure) on its main body. The left side of the main body is the execution unit, which can swing according to the required size, thereby controlling the up and down movement of the second movable seat 2.

[0035] Function y=a*x 2 In +b*x+c, the parameters a, b, and c are determined according to the actual situation. The following is a specific example: Figure 2 , the working state needs to ensure the negative pressure target of 10000Pa. Three states under the working state are selected, namely large flow x=0.1, medium flow x=0.06, and small flow x=0.03, and three sets of equations are obtained as follows:

[0036] 0.1A=0.1^2*a+0.1*b+c

[0037] 0.06A=0.06^2*a+0.06*b+c

[0038] 0.03A=0.03^2*a+0.03*b+c

[0039] A needs to be calculated based on the target negative pressure. For example, if the negative pressure target is 10,000 Pa, the channel area needs to be controlled at 200 mm. 2 , then A=2000, making 0.1A=200. From this, we can calculate the values ​​of parameters a, b, and c.

[0040] The idea of ​​this invention is to add a negative pressure generator in front of the pressure and temperature test tube, and use the pressure drop caused by the fluid passing through the pipeline to create a certain negative pressure condition. The ability of the pipeline to generate negative pressure is related to the flow conditions of the medium. In order to ensure the same negative pressure conditions under different flow conditions, a unique negative pressure generator is designed. The first movable seat 1 (slider) is designed in a special style, and its curved surface needs to be defined as y=a*x 2 +b*x+c, where x is the height distance. This function defines the device's ability to generate negative pressure.

[0041] During operation, the second movable seat at the top moves up or down as the flow rate changes, thereby adjusting the channel structure in real time to form a corresponding negative pressure. The second movable seat at the top adjusts the height of the X value in real time through the pressure actuator, thus establishing a changing pattern between flow rate and channel area.

[0042] As can be seen from the above description, the booster test system in this application adds a negative pressure generator in the pipeline. The structure in the negative pressure generator can reduce the flow area of ​​the flow channel, that is, reduce the gas flow rate passing through, thereby achieving the function of generating negative pressure and simulating the working conditions of the booster in a high-altitude negative pressure environment.

[0043] As described above, the present invention provides a supercharger testing system with a negative pressure function, which adds a negative pressure generator and can generate a negative pressure effect as needed. The overall structure is simple, the operation is convenient, and the negative pressure size is easy to adjust.

[0044] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention is based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by those skilled in the art fall within the protection scope of the present invention.

Claims

1. The booster test system with negative pressure function is characterized by: The test system includes an inlet connected to the negative pressure generator through a pipeline, and a flow meter is provided on the pipeline between the inlet and the negative pressure generator; The negative pressure generator is connected to a test object assembly platform via a pipeline. The test object assembly platform is used to assemble a supercharger. A first test tube is provided on the pipeline. The test object assembly platform is also connected to the outlet valve via another pipeline, and a second test pipe is provided on this pipeline; The device also includes a control device, which is communicatively connected to the flow meter, the first test tube, the second test tube, and the outlet valve, and can perform corresponding control operations.

2. The supercharger testing system with negative pressure function according to claim 1, characterized in that: The negative pressure generator is connected to a pressure sensor controller, and a signal is connected to the flow meter or the pipeline of the inlet section.

3. The supercharger testing system with negative pressure function according to claim 2, characterized in that: The negative pressure generator is an adjustable negative pressure generator with a variable flow surface.

4. The supercharger testing system with negative pressure function according to claim 3, characterized in that: The negative pressure generator comprises a first movable seat (1) and a second movable seat (2); the first movable seat (1) is provided with a plurality of arranged curved panels (11), with gaps (12) between adjacent curved panels (11); the second movable seat (2) comprises two side panels (22) arranged opposite to each other, with a plurality of partitions (21) provided between the two side panels (22); The first movable seat (1) can be moved into the flow channel to reduce the flow area of ​​the flow channel; The second movable seat (2) can move toward the first movable seat (1) and insert the block partition (21) into the gap (12), thereby adjusting the flow area of ​​the flow channel to stabilize the negative pressure.

5. The supercharger testing system with negative pressure function according to claim 4, characterized in that: The first movable seat (1) is provided with 6 to 10 gaps (12), and the second movable seat (2) is provided with a corresponding number of partitions (21).

6. The supercharger testing system with negative pressure function according to claim 5, characterized in that: The coordinate system is established from the flow channel section, and the function of the curve of the curved surface a of the curved plate (11) is y=a*x 2 +b*x+c.

7. The supercharger testing system with negative pressure function according to claim 6, characterized in that: The first test tube and the second test tube are both provided with a temperature sensor and a pressure sensor.

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