A device for automatically testing the stroke of a turbocharger aerodynamic head

Abstract

An automatic testing device for the stroke of a pneumatic actuator of an exhaust gas turbocharger is characterized by including a measurement module, a pressure supply module, a control module, and a data analysis module; it solves the problems of simple manual testing, improves testing speed and accuracy, and optimizes the test method for the stroke-supply pressure curve of the pneumatic actuator of the exhaust gas turbocharger.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic actuators for exhaust gas turbochargers, and in particular to an automatic testing device and method for the stroke of a pneumatic head of an exhaust gas turbocharger. Background Technology

[0002] Currently, pneumatic actuators used in exhaust gas turbochargers are commonly known as "pneumatic heads." These actuators control the opening of the exhaust gas turbocharger's vent valve by converting air pressure into mechanical motion. The linear relationship between the air supply pressure and the stroke is a key factor in achieving precise and stable control. Therefore, measuring the curve of the mechanical stroke of the pneumatic head versus the air supply pressure is an important part of quality control during the production process of turbocharger pneumatic actuators.

[0003] The commonly used testing method is to manually adjust the valve to control the input air pressure, fix the actuator with a custom fixture, and then use a dial indicator to measure the stroke. This method is time-consuming due to its operational difficulty, the number of sampling points cannot meet the measurement accuracy requirements of pneumatic actuators, the measurement subdivision accuracy is low, and some special or abnormal points may be missed, affecting the quality of the products leaving the factory. In addition, the single result data directly output by this method is not intuitive for linearity analysis. Summary of the Invention

[0004] This utility model addresses the problems mentioned in the background art by providing an automatic testing device and method for the stroke of the pneumatic actuator of an exhaust gas turbocharger, solving the problems of manual testing, improving testing speed and accuracy, and optimizing the test method for the stroke-supply pressure curve of the pneumatic actuator of the exhaust gas turbocharger.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic testing device for the stroke of a pneumatic head of an exhaust gas turbocharger, characterized by comprising a measurement module, a pressure supply module, a control module, and a data analysis module;

[0007] The measurement module includes an actuator clamping assembly and a measurement unit;

[0008] The actuator clamping assembly is used to clamp and fix the pneumatic actuator body to be tested in a spatial position, and works with the position stroke sensor in the measurement unit to detect the displacement stroke data of the moving end of the pneumatic actuator.

[0009] The measuring unit includes a stroke sensor and an electronic pressure gauge. The stroke sensor is used to detect the displacement stroke distance data of the moving end of the pneumatic actuator, and the electronic pressure gauge is used to measure the pressure data input by the pressure supply module.

[0010] The pressure supply module is used to provide adjustable drive air pressure to the pneumatic actuator under test;

[0011] The control module is used to control the air pressure output of the pressure supply module and adjust the air supply pressure to be tested pneumatic actuator;

[0012] The data analysis module is used to record and analyze the air pressure and displacement data collected by the measurement unit in the measurement module, and simultaneously output a visualized curve showing the relationship between air pressure and displacement.

[0013] A further embodiment of this invention is as follows: the actuator clamping assembly includes a positioning slider, an active slider, a guide rod, an adjusting screw, clamping block A, and clamping block B. One end of the guide rod has an internal threaded hole. One end of the adjusting screw is connected to the internal threaded hole, and the other end is fixedly connected to clamping block B. Clamping block A is fixed on the radial outer wall of the end of the guide rod with the internal threaded hole. Adjusting the fit between the adjusting screw and the internal threaded hole adjusts the distance between clamping block A and clamping block B, thus clamping objects of different sizes between clamping blocks A and B. The small pneumatic actuator body has an active slider and a positioning slider arranged from the outside to the inside on the radial outer wall of the other end of the guide rod. The active slider is equipped with the stroke sensor and a baffle that contacts the moving end of the pneumatic actuator. The moving end of the pneumatic actuator can push the baffle to cause the active slider to move axially on the guide rod. The stroke sensor collects the displacement stroke data of the baffle pushed by the moving end of the pneumatic actuator. The positioning slider is equipped with a locking pin, which can fix the axial position of the positioning slider on the guide rod. After the position is fixed, it can be used as the starting reference point for the stroke of the displacement sensor.

[0014] A further aspect of this invention is that the pressure supply module includes an external air source inlet, an air pressure regulating device, and a pressure output end. The external air source inlet is connected to an external device that can provide continuous and stable air pressure. The air pressure regulating device is an electrically controlled air valve. The pressure output end is connected to the air pressure input end of the pneumatic actuator to be tested.

[0015] A further aspect of this invention is that the pressure regulating device further includes a manual air valve, which is located between the pressure output end and the electrically controlled air valve of the pressure regulating device. It is used to switch between manual and electrically controlled modes. In the electrically controlled mode, the manual air valve is fully open, and the output air pressure is adjusted by adjusting the opening degree of the electrically controlled air valve through the control device. In the manual mode, the electrically controlled air valve is fully open, and the output air pressure is adjusted by manually adjusting the opening degree of the manual air valve.

[0016] A further approach is that the data acquisition and analysis module can be integrated with the control module on the same control terminal and connected by signals, or it can exist as the host computer of the control module, recording the real-time acquired displacement and pressure signals and simultaneously plotting curves.

[0017] The working process of this utility model involves the following steps:

[0018] 1. Positioning: Use the actuator clamping assembly to fix the pneumatic actuator in place. Press the moving end of the pneumatic actuator against the baffle on the active slider. Turn on the external pressure air source connected to the pressure supply module and zero it.

[0019] 2. Zeroing: Since the pneumatic actuator will generate resistance when the input air pressure is greater than its resistance, the pneumatic actuator will only move when the input pressure is greater than its resistance. The automatic system finds the opening pressure by continuously increasing the input air pressure. When the displacement sensor detects a small displacement of the moving end, it records the air pressure value at that point and sets it as the pressure zero point. The displacement point at this time is recorded as the stroke zero point.

[0020] 3. Recording and Analysis: By analyzing and plotting the curve of the relationship between the input pressure and the stroke of the pneumatic actuator in real time through a terminal equipped with a data analysis module, an intuitive test result of the pneumatic actuator can be obtained.

[0021] After the zeroing step, the system sets the interval to a small value and automatically calculates the slope between each point. When the slope changes significantly, the system stops increasing the air pressure and releases a portion of the pressure, setting it as the upper limit displacement value.

[0022] During the zeroing process, manual and automatic adjustment modes can be switched. When automatic mode is selected, the manual adjustment valve must be fully open and unobstructed. When manual mode is selected, the control module will adjust the opening of the electric air valve to be fully closed, prompting the user to fully close the manual air valve before fully opening the electric air valve to prevent the air pressure from suddenly increasing and affecting the sample and the test, ensuring that the test starts from the zero pressure point.

[0023] The beneficial effects of this utility model are: solving the problems of simple manual testing, improving testing speed and accuracy, and optimizing the test method of stroke-supply pressure curve of exhaust gas turbocharger pneumatic actuator. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the module structure of an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the actuator clamping assembly structure according to an embodiment of the present utility model. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Example

[0027] like Figure 1 As shown, an automatic testing device for the stroke of a pneumatic head of an exhaust gas turbocharger includes a measurement module 1, a pressure supply module 2, a control module 3, and a data analysis module 4.

[0028] The measurement module 1 includes an actuator clamping assembly 6 and a measurement unit;

[0029] The actuator clamping assembly 6 is used to clamp and fix the spatial position of the pneumatic actuator 5 body to be tested, and cooperates with the position stroke sensor in the measurement unit to detect the displacement stroke data of the moving end of the pneumatic actuator 5.

[0030] The measuring unit includes a stroke sensor and an electronic pressure gauge 9. The stroke sensor is used to detect the displacement stroke distance data of the moving end of the pneumatic actuator 5. The electronic pressure gauge 9 is set between the pressure supply module 2 and the pneumatic actuator 5 and is used to measure the pressure data input by the pressure supply module 2.

[0031] The pressure supply module 2 is used to provide adjustable driving air pressure to the pneumatic actuator 5 under test;

[0032] The control module 3 is used to control the air pressure output of the pressure supply module 2 and adjust the air supply pressure to be supplied to the pneumatic actuator 5 under test.

[0033] The data analysis module 4 is used to record and analyze the air pressure and displacement data collected by the measurement unit in the measurement module, and simultaneously output a visualized curve showing the relationship between air pressure and displacement.

[0034] The pressure supply module 2 includes an external air source inlet 21, an air pressure regulating device 22, and a pressure output end 23. The external air source inlet 21 is connected to an external device 7 that can provide continuous and stable air pressure. The air pressure regulating device 22 is an electrically controlled air valve. The pressure output end 23 is connected to the air pressure input end of the pneumatic actuator 5 to be tested.

[0035] The pressure regulating device 22 also includes a manual air valve, which is located between the pressure output end 23 and the electrically controlled air valve of the pressure regulating device 22. It is used to switch between manual and electrically controlled modes. In the electrically controlled mode, the manual air valve is fully open, and the output air pressure is adjusted by adjusting the opening degree of the electrically controlled air valve through the control module 3. In the manual mode, the electrically controlled air valve is fully open, and the output air pressure is adjusted by manually adjusting the opening degree of the manual air valve.

[0036] The data analysis module 4 can be integrated with the control module 3 on the same control terminal and connected by signals, or it can exist as the host computer of the control module 3, recording the displacement and pressure signals collected in real time and plotting curves synchronously.

[0037] like Figure 2 As shown, the actuator clamping assembly 6 includes a positioning slider 61, an active slider 62, a guide rod 63, an adjusting screw 64, a clamping block A65, and a clamping block B66. One end of the guide rod 63 has an internal threaded hole 631. One end of the adjusting screw 64 is connected to the internal threaded hole 631, and the other end is fixed to the clamping block B66. The clamping block A65 is fixed on the radial outer wall of the end of the guide rod 63 with the internal threaded hole 631. Adjusting the fit between the adjusting screw 64 and the internal threaded hole adjusts the distance between the clamping block A65 and the clamping block B66, thus clamping objects of different sizes between the clamping blocks A65 and B66. The pneumatic actuator 5 body has an active slider 62 and a positioning slider 61 arranged from the outside to the inside on the radial outer wall of the other end of the guide rod 63. The active slider 62 is equipped with the stroke sensor and a baffle 621 that contacts the moving end of the pneumatic actuator 5. The moving end of the pneumatic actuator 5 can push the baffle 621 to drive the active slider 62 to move axially on the guide rod 63. The stroke sensor collects the displacement stroke data of the baffle 621 pushed by the moving end 51 of the pneumatic actuator 5. The positioning slider 61 is equipped with a locking pin 611, which can fix the axial position of the positioning slider 61 on the guide rod 63. After fixing the position, it can be used as the starting reference point for the stroke of the displacement sensor.

Claims

1. An automatic testing device for the stroke of a pneumatic head of an exhaust gas turbocharger, characterized in that: It includes a measurement module, a pressure supply module, a control module, and a data analysis module; The measurement module includes an actuator clamping assembly and a measurement unit; The actuator clamping assembly is used to clamp and fix the pneumatic actuator body to be tested in a spatial position, and works with the position stroke sensor in the measurement unit to detect the displacement stroke data of the moving end of the pneumatic actuator. The measuring unit includes a stroke sensor and an electronic pressure gauge. The stroke sensor is used to detect the displacement stroke distance data of the moving end of the pneumatic actuator, and the electronic pressure gauge is used to measure the pressure data input by the pressure supply module. The pressure supply module is used to provide adjustable drive air pressure to the pneumatic actuator under test; The control module is used to control the air pressure output of the pressure supply module and adjust the air supply pressure to be tested pneumatic actuator; The data analysis module is used to record and analyze the air pressure and displacement data collected by the measurement unit in the measurement module, and simultaneously output a visualized curve showing the relationship between air pressure and displacement.

2. An automatic test device for the axial displacement of the aerodynamic head of a turbocharger, as set forth in claim 1, characterized in that The pressure supply module includes an external air source inlet, an air pressure regulating device, and a pressure output end. The external air source inlet is connected to an external device that can provide continuous and stable air pressure. The air pressure regulating device is an electrically controlled air valve. The pressure output end is connected to the air pressure input end of the pneumatic actuator to be tested.

3. An automatic test device for the axial travel of the aerodynamic head of a turbocharger, as set forth in claim 2, characterized in that The pressure regulating device also includes a manual air valve, which is located between the pressure output end and the electrically controlled air valve of the pressure regulating device. It is used to switch between manual and electrically controlled modes. In the electrically controlled mode, the manual air valve is fully open, and the output air pressure is adjusted by adjusting the opening of the electrically controlled air valve through the control device. In the manual mode, the electrically controlled air valve is fully open, and the output air pressure is adjusted by manually adjusting the opening of the manual air valve.

4. An automatic testing device for the stroke of a pneumatic head of an exhaust gas turbocharger as described in any one of claims 1-3, characterized in that: The data acquisition and analysis module can be integrated with the control module on the same control terminal and connected by signals, or it can exist as the host computer of the control module, recording the real-time acquired displacement and pressure signals and plotting curves synchronously.

5. A device for automatically testing the operation of the pneumatic head of a turbocharger according to any one of claims 1 to 4, characterized in that The actuator clamping assembly includes a positioning slider, an active slider, a guide rod, an adjusting screw, clamping block A, and clamping block B. One end of the guide rod has an internally threaded hole. One end of the adjusting screw is connected to the internally threaded hole, and the other end is fixedly connected to clamping block B. Clamping block A is fixed to the radial outer wall of the end of the guide rod with the internally threaded hole. Adjusting the fit between the adjusting screw and the internally threaded hole adjusts the distance between clamping block A and clamping block B, thus clamping pneumatic actuators of different sizes between clamping blocks A and B. The device body has an active slider and a positioning slider arranged from the outside to the inside on the radial outer wall of the other end of the guide rod. The active slider is equipped with the stroke sensor and a baffle that contacts the moving end of the pneumatic actuator. The moving end of the pneumatic actuator can push the baffle to drive the active slider to move axially on the guide rod. The stroke sensor collects the displacement stroke data of the baffle pushed by the moving end of the pneumatic actuator. The positioning slider is equipped with a locking pin, which can fix the axial position of the positioning slider on the guide rod. After the position is fixed, it can be used as the starting reference point for the stroke of the displacement sensor.

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