Visual structure for positioning rotating speed sensor of mixed flow turbocharger

Abstract

The utility model relates to the technical field of turbochargers, in particular to a visual structure for positioning a rotating speed sensor of a mixed flow turbocharger, which comprises a compressor casing, a bearing casing, a measured part, a rotating speed sensor end face, a rotating speed sensor and two cylindrical plane mirrors. The two through holes and the two cylindrical plane mirrors form an observation window, each cylindrical plane mirror is provided with a cylindrical plane mirror upper end face and a cylindrical plane mirror lower end face, the cylindrical plane mirror upper end faces are installed outside the bearing shell, and the cylindrical plane mirror lower end faces are installed inside the bearing shell. The bearing shell is provided with a through hole, the rotating speed sensor is provided with a rotating speed sensor probe end face, the rotating speed sensor is installed inside the through hole, the tested part is placed inside the bearing shell, and the compressor shell is arranged outside the bearing shell in a sleeving mode.

Description

Technical Field

[0001] The utility model relates to the technical field of turbochargers, in particular to a visualization structure for positioning a rotation speed sensor of a mixed-flow turbocharger. Background Art

[0002] As one of the key components of marine diesel engines, turbochargers play an extremely important role in improving the power and fuel economy of diesel engines. The speed of a turbocharger is a key indicator for judging the normal operation of the turbocharger. Therefore, the speed sensor, a supporting component for real-time monitoring of the turbocharger speed, is not only related to the operating safety of the turbocharger, but also indirectly related to the reliability of marine diesel engines. Considering that the speed sensor is an indirect measuring device that converts the speed of a rotating object into electrical output, when installing the speed sensor, it is necessary to ensure that the distance between the speed sensor probe and the rotating object being measured is within a reasonable range. A reasonable distance value can not only ensure accurate measurement of the speed value, but also prevent the probe from being scratched or even broken by the rotating object.

[0003] At present, the positioning of the supercharger speed sensor can be divided into the following methods: 1. Directly rotate and install the speed sensor and use a feeler gauge to locate the distance between the speed sensor probe and the rotating body to be measured; 2. Use nuts and copper gaskets to adjust the distance between the speed sensor probe and the rotating body to be measured; 3. The prior art patent 202122218786.2 discloses a mixed flow supercharger speed sensor positioning structure. By designing a speed sensor positioning structure on the supercharger structure, the distance between the speed sensor probe and the rotating body to be measured is positioned.

[0004] The above positioning method three solves the problems of limited installation in positioning method one and inaccurate positioning in positioning method two. However, it is found in engineering practice that when positioning method three is used for positioning, the speed sensor speed measurement value is inaccurate, there is no parameter display, etc., and nuts and copper washers are still required for spacing, which makes the measurement value accuracy low and greatly prolongs the test cost of the supercharger bench. Utility Model Content

[0005] The purpose of the utility model is to provide a visualization structure for positioning a mixed-flow turbocharger speed sensor, which solves the problem that when positioning method three is used for positioning in the prior art, the speed sensor speed measurement value is inaccurate, there is no parameter display, etc., and nuts and copper washers are still needed for spacing, which makes the measurement value accuracy low and greatly prolongs the test cost of the supercharger bench.

[0006] To achieve the above-mentioned purpose, the utility model provides a visualization structure for positioning a mixed-flow turbocharger speed sensor, comprising a compressor casing, a bearing casing, a part to be measured, a speed sensor end face, a speed sensor and two cylindrical plane mirrors, wherein the bearing casing has two through holes, and the two through holes and the two cylindrical plane mirrors form an observation window, and the two cylindrical plane mirrors each have an upper end face of a cylindrical plane mirror and a lower end face of a cylindrical plane mirror, the upper end face of the cylindrical plane mirror is mounted on the outside of the bearing casing, and the lower end face of the cylindrical plane mirror is mounted on the inside of the bearing casing, the speed sensor has a speed sensor probe end face, and the speed sensor is mounted on the inside of the through hole, the part to be measured is placed on the inside of the bearing casing, and the compressor casing is sleeved on the outside of the bearing casing.

[0007] Wherein, the two cylindrical plane mirrors are respectively matched with the corresponding through holes.

[0008] Wherein, the cylindrical plane mirror is made of high temperature resistant material.

[0009] Wherein, the rotation speed sensor and the end surface of the rotation speed sensor probe are both adapted to the through hole.

[0010] Among them, the upper end surface of the cylindrical plane mirror is an inclined plane, and the lower end surface of the cylindrical plane mirror is a horizontal plane.

[0011] The utility model discloses a visualization structure for positioning a mixed flow turbocharger speed sensor, wherein the distance L between the probe end face of the speed sensor and the measured part needs to be visually adjusted through a visualization window; the speed sensor positioning can be divided into two steps, wherein the first step is to slowly screw the speed sensor into the through hole of the observation window, and stop screwing in when the screwed-in speed sensor is just seen through the observation window; the second step is to continue to slowly screw in the speed sensor, and stop screwing in when the section distance L between the screwed-in speed sensor probe end face and the outer cylindrical surface of the measured part is observed through the observation window and is within a suitable range, thereby accurately controlling the spacing value between the speed sensor end face and the measured body through the cylindrical plane mirror of the observation window through the visual line of sight, thereby achieving the purpose of accurately positioning the mixed flow turbocharger speed sensor, increasing the real-time monitoring capability of the turbocharger, and improving the operating reliability of the mixed flow turbocharger. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0013] Figure 1 It is an overall structural schematic diagram of the utility model.

[0014] Figure 2It is a structural schematic diagram of the rotation speed sensor of the utility model.

[0015] Figure 3 It is a structural schematic diagram of a cylindrical plane mirror of the utility model.

[0016] Figure 4 It is a structural schematic diagram of the observation window of the utility model.

[0017] 1- compressor housing, 2- bearing housing, 3- measured part, 4- end face of speed sensor probe, 5- speed sensor, 6- observation window, 6a- observation window through hole, 7- cylindrical plane mirror, 7a- upper end face of cylindrical plane mirror, 7b- lower end face of cylindrical plane mirror. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0019] See also Figures 1 to 4 The utility model provides a visualization structure for positioning a mixed-flow turbocharger speed sensor, comprising a compressor housing 1, a bearing housing 2, a measured part 3, an end face of a speed sensor 5, a speed sensor 5 and two cylindrical plane mirrors 7, wherein the bearing housing 2 has two through holes, and the two through holes and the two cylindrical plane mirrors 7 form an observation window 6, and the two cylindrical plane mirrors 7 each have an upper end face 7a of a cylindrical plane mirror and a lower end face 7b of a cylindrical plane mirror, the upper end face 7a of the cylindrical plane mirror is mounted on the outside of the bearing housing 2, and the lower end face 7b of the cylindrical plane mirror is mounted on the inside of the bearing housing 2, the speed sensor 5 has a speed sensor probe end face 4, the speed sensor 5 is mounted on the inside of the through hole, the measured part 3 is placed on the inside of the bearing housing 2, and the compressor housing 1 is sleeved on the outside of the bearing housing 2.

[0020] In this embodiment, the distance L between the probe end face of the rotation speed sensor 5 and the measured part 3 needs to be visually adjusted through the visualization window; the positioning of the rotation speed sensor 5 can be divided into two steps, the first step is to slowly screw the rotation speed sensor 5 into the observation window through hole 6a, and stop screwing in when the rotation speed sensor 5 is just seen through the observation window 6; the second step is to continue to slowly screw in the rotation speed sensor 5, and stop screwing in when the distance L between the section of the end face 4 of the rotation speed sensor probe screwed in and the outer cylindrical surface of the measured part 3 is within a suitable range when observed through the observation window 6;

[0021] The measured part 3 is a part that rotates with the main shaft of the supercharger. The speed sensor 5 converts the speed of the rotating part into an electrical signal, and finally obtains the real-time speed value of the supercharger after processing the signal source; the speed sensor 5 is composed of the body of the speed sensor 5 and the probe end face at the front end. When measuring, the speed sensor 5 is rotated into the through hole, and finally ensures that the distance L between the rotationally entered speed sensor probe end face 4 and the tangent plane of the outer cylindrical surface of the measured part 3 is within a reasonable range. When installing, first apply high temperature resistant glue on the peripheral surface of the observation window through hole 6a, and then install the two cylindrical plane mirrors 7 into the observation window through hole 6a;

[0022] The cylindrical plane mirror 7 is fixedly connected to the through hole diameter by threads, and before assembling the cylindrical plane mirror 7, high-temperature resistant glue needs to be evenly applied to the circumferential surface of the connecting hole of the bearing shell 2, which can not only improve the firmness of the cylindrical plane mirror 7, but also ensure the sealing of the bearing shell 2; considering the arc structure of the bearing shell 2, the cylindrical plane mirror upper end face 7a of the cylindrical plane mirror 7 is designed as an inclined plane to better fit the outer arc structure of the bearing shell 2, and the cylindrical plane mirror lower end face 7b is designed as a horizontal plane to ensure a clear visual range of the observation window 6; when positioning the speed sensor 5, first slowly screw the speed sensor 5 into a part of the through hole of the bearing shell 2, and stop rotating when the screwed-in speed sensor 5 can be seen through the observation window 6, and then continue to rotate relatively slowly. The rotation speed sensor 5 is rotated, and the distance L between the end face 4 of the rotation speed sensor probe and the tangent plane of the outer cylindrical surface of the measured part 3 is observed through the observation window 6. Finally, the distance L is controlled within a reasonable range to ensure the accuracy of the measurement value of the rotation speed sensor 5. The positioning is performed through the two steps of positioning the rotation speed sensor 5, which can not only avoid the rotation speed sensor 5 rotating too fast during installation and causing damage to the measured part 3, but also achieve accurate positioning of the rotation speed sensor 5 and improve the accuracy of the measurement value of the rotation speed sensor 5. Therefore, the cylindrical plane mirror 7 through the observation window 6 can be used to accurately control the distance value between the end face of the rotation speed sensor 5 and the measured body through visual sight, so as to achieve the purpose of accurately positioning the rotation speed sensor 5 of the mixed flow turbocharger, increase the real-time monitoring capability of the turbocharger, and improve the operating reliability of the mixed flow turbocharger.

[0023] Furthermore, the two cylindrical plane mirrors 7 are respectively matched with the corresponding through holes.

[0024] Furthermore, the cylindrical plane mirror 7 is made of high temperature resistant material.

[0025] Furthermore, the rotation speed sensor 5 and the rotation speed sensor probe end face 4 are both adapted to the through hole.

[0026] Furthermore, the upper end surface 7a of the cylindrical plane mirror is an inclined plane, and the lower end surface 7b of the cylindrical plane mirror is a horizontal plane.

[0027] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A visualization structure for positioning a mixed flow turbocharger speed sensor, characterized in that: It includes a compressor housing, a bearing housing, a part to be measured, an end face of a speed sensor, a speed sensor and two cylindrical plane mirrors, the bearing housing has two through holes, the two through holes and the two cylindrical plane mirrors form an observation window, the two cylindrical plane mirrors each have an upper end face of a cylindrical plane mirror and a lower end face of a cylindrical plane mirror, the upper end face of the cylindrical plane mirror is mounted on the outside of the bearing housing, the lower end face of the cylindrical plane mirror is mounted on the inside of the bearing housing, the speed sensor has a speed sensor probe end face, the speed sensor is mounted on the inside of the through hole, the part to be measured is placed on the inside of the bearing housing, and the compressor housing is sleeved on the outside of the bearing housing.

2. The visualization structure for positioning the mixed flow turbocharger speed sensor according to claim 1, characterized in that: The two cylindrical plane mirrors are respectively matched with the corresponding through holes.

3. The visualization structure for positioning the mixed flow turbocharger speed sensor according to claim 2, characterized in that: The cylindrical plane mirror is made of high temperature resistant material.

4. The visualization structure for positioning the mixed flow turbocharger speed sensor according to claim 3, characterized in that: The rotation speed sensor and the rotation speed sensor probe end surface are both adapted to the through hole.

5. The visualization structure for positioning the mixed-flow turbocharger speed sensor according to claim 4, characterized in that: The upper end surface of the cylindrical plane mirror is an inclined plane, and the lower end surface of the cylindrical plane mirror is a horizontal plane.

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