Volute centering detection equipment for turbocharger

Abstract

The invention relates to the technical field of turbocharger detection equipment, in particular to volute centering detection equipment for a turbocharger, which comprises a rack, a turntable is mounted on the rack, a first positioning component and a second positioning component which are movable are arranged on the table top of the turntable, a support rod is fixed on the table top of the turntable, and a top plate is arranged at the top of the support rod. One end of the top plate is provided with a shaft pushing assembly axially aligned to one end of the impeller shaft, the center of the rotating disc is provided with a first sensor axially aligned to the other end of the impeller shaft, and one side of the top plate is provided with a second sensor right opposite to the impeller. According to the invention, volute flange end relative angle detection, impeller shaft axial play detection and impeller radial clearance detection are integrated in the same equipment, multiple detection items can be completed by single clamping, and the equipment utilization rate and the detection efficiency are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of turbocharger testing equipment technology, specifically to a turbocharger volute housing alignment testing device. Background Technology

[0002] As a core component for improving engine power performance and reducing fuel consumption, the assembly precision of the turbocharger directly determines the overall efficiency and service life of the engine.

[0003] In the design of turbochargers, the relative angle of the flange ends of the volute housings (including the compressor volute housing and the turbine volute housing) plays a crucial role. This angle needs to match the spatial layout of the intake and exhaust pipes in the engine compartment to ensure assembly compatibility; on the other hand, it affects the smoothness of airflow entering and exiting the volute housing. Angle deviations will increase airflow drag and pressure loss, further weakening the boost effect.

[0004] Currently, turbine casing assembly is mostly done manually with the aid of tools, which is not only inefficient but also highly dependent on the operator's experience. After the turbocharger is assembled, the impeller needs to be inspected to prevent impeller jamming. Existing testing equipment cannot simultaneously cover the detection of both impeller shaft axial movement and impeller radial clearance, reducing testing efficiency. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention proposes a turbocharger volute alignment detection device that integrates the detection of volute alignment angle, impeller shaft axial movement, and impeller radial clearance, thereby improving detection efficiency and accuracy.

[0006] Specifically, a turbocharger volute alignment detection device includes a test bench with a turntable mounted on it. The turntable has a movable first and second positioning components for positioning the turbocharger. The turbocharger has an impeller shaft inside, with an impeller mounted on the shaft. A support rod is fixed to the turntable, and a top plate is mounted on the top of the support rod. A shaft thrust assembly axially aligned with one end of the impeller shaft is mounted on one end of the top plate. A first sensor axially aligned with the other end of the impeller shaft is mounted at the center of the turntable. A second sensor facing the impeller is mounted on one side of the top plate. The test bench has two sets of mounting seats, each with a movably mounted air gun facing the first and second positioning components. The air gun's nozzle passes through the corresponding first or second positioning component and extends into the turbocharger's volute.

[0007] Preferably, the shaft thrust assembly includes a first cylinder and a push rod. The first cylinder is vertically fixed to the top of the top plate, and a guide seat is installed at the bottom of the top plate. The push rod is coaxial with the impeller shaft and slides in cooperation with the guide seat. The first cylinder drives the push rod to apply an axial load to the impeller shaft.

[0008] Preferably, one end of the guide seat is provided with a movable cavity, and the other end of the guide seat is provided with a guide cavity communicating with the movable cavity. The push rod protrudes from the guide seat through the guide cavity. The end of the push rod facing the first cylinder is provided with a tail seat, which is located in the movable cavity. The push rod is covered with a spring, one end of which abuts against the tail seat, and the other end of which abuts against the junction of the movable cavity and the guide cavity.

[0009] Preferably, the turntable has a concave cavity at its center, and a pedestal for fixing the turbocharger is installed in the concave cavity. The first sensor is installed at the center of the pedestal, and the pedestal has multiple sets of circumferentially distributed arc-shaped waist holes on its surface.

[0010] Preferably, the platform is also equipped with a locking component for locking the turntable to limit the rotation of the turntable.

[0011] Preferably, the locking assembly includes a second cylinder and a slide block. The second cylinder is fixed to the table surface of the frame. The outer edge of the turntable is provided with two sets of rollers arranged at intervals. The slide block is slidably connected to the frame. A push rod is fixed on the slide block, facing the gap between the two sets of rollers. One end of the push rod is fixedly connected to the push rod of the second cylinder.

[0012] Preferably, the upper end face of the turntable is provided with a first guide hole and a second guide hole, the first positioning component slides along the first guide hole, and the second positioning component slides along the second guide hole.

[0013] Preferably, the first positioning component includes a base, one end of which is provided with a vertical plate, the vertical plate is provided with a through hole for the air gun to pass through, and the bottom of the base is provided with a wedge block adapted to the first guide hole.

[0014] Preferably, the lower end face of the turntable is provided with an elongated hole corresponding to the first guide hole, the base is fixed by a screw, the top end of the screw is fixed with a handle that abuts against the base, and the bottom end of the screw is connected to a nut, which is embedded in the elongated hole to restrict its rotation.

[0015] After adopting the above technical solution, the beneficial effects of the present invention are: This invention integrates the detection of the relative angle of the volute flange end, the detection of the axial movement of the impeller shaft, and the detection of the radial clearance of the impeller into the same device, enabling multiple detection items to be completed in a single clamping, thus greatly improving the utilization rate and detection efficiency of the equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the installation of the shaft thrust assembly; Figure 3 This is a schematic diagram of the shaft thrust assembly; Figure 4 This is a schematic diagram of the locking assembly. Figure 5 This is a schematic diagram of the installation of the second positioning component; Figure 6 This is a schematic diagram of the structure of the first positioning component.

[0018] Explanation of reference numerals in the attached drawings: 1-stand, 2-locking assembly, 3-turntable, 4-base, 5-through hole, 6-mounting seat, 7-air gun, 8-first positioning assembly, 9-turbocharger, 10-second positioning assembly, 11-shaft push assembly, 12-top plate, 13-support rod, 14-first sensor, 15-arc-shaped waist hole, 16-guide seat, 17-first cylinder, 18-second sensor, 19-top rod, 20-moving cavity, 21-guide cavity, 22-spring, 23-tailstock, 24-second cylinder, 25-slide seat, 26-roller, 27-push rod, 28-first guide hole, 29-second guide hole, 30-oblong hole, 31-wedge, 32-nut, 33-screw, 34-handle, 35-vertical plate, 36-base. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Those skilled in the art will recognize that the invention can be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of it.

[0020] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the invention. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] like Figure 1 As shown, the turbocharger volute alignment testing equipment includes a test stand 1 and a turntable 3. The turntable 3 is mounted on the test stand 1 via a rotating shaft and can rotate.

[0022] A support rod 13 is fixed on the table surface of the turntable 3. A top plate 12 is provided on the top of the support rod 13. A shaft thrust assembly 11 axially aligned with one end of the impeller shaft is installed on one end of the top plate 12. A first sensor 14 axially aligned with the other end of the impeller shaft is installed at the center of the turntable 3 to realize the detection of axial movement of the impeller shaft.

[0023] like Figure 2 As shown, the turntable 3 has a recessed cavity at its center, within which a base 4 for fixing the turbocharger 9 is installed. By replacing the base 4 with different specifications, the positioning and clamping requirements of turbochargers 9 of different specifications can be met. The first sensor 14 is installed at the center of the base 4, and the detection end face of the first sensor 14 is lower than the table surface of the base 4 to avoid collisions caused during workpiece installation. The table surface of the base 4 has multiple sets of circumferentially distributed arc-shaped waist holes 15, allowing for overall fine-tuning of the turbocharger 9 and improving centering accuracy.

[0024] like Figure 2 and Figure 3 As shown, the shaft thrust assembly 11 includes a first cylinder 17 and a push rod 19. The first cylinder 17 is vertically fixed to the top of the top plate 12, and a guide seat 16 is installed at the bottom of the top plate 12.

[0025] The guide seat 16 has a movable cavity 20 at one end facing the first cylinder 17, and a guide cavity 21 communicating with the movable cavity 20 at the other end. A push rod 19 is placed inside the guide seat 16, passing through the guide cavity 21 and protruding from the guide seat 16 to achieve a sliding fit. The outer diameter of the push rod 19 matches the inner diameter of the guide cavity 21, limiting radial displacement of the push rod 19 and ensuring that the push rod 19 remains coaxial with the impeller shaft. A tailstock 23 is provided at the end of the push rod 19 facing the first cylinder 17, and the tailstock 23 is located in the movable cavity 20.

[0026] The push rod 19 is fitted with a spring 22. One end of the spring 22 abuts against the tailstock 23, and the other end abuts against the junction of the movable cavity 20 and the guide cavity 21. The spring 22 can be compressed when the push rod 19 is loaded, which can absorb instantaneous impact force and avoid damage to the impeller shaft caused by rigid contact.

[0027] The first cylinder 17 is activated, and the driving force is applied to the tailstock 23. The tailstock 23 pushes the push rod 19 to move axially along the guide cavity 21 of the guide seat 16. The front end of the push rod 19 gradually approaches and contacts the impeller shaft, applying a preset axial load to the impeller shaft. The first sensor 14 captures the axial movement distance of the impeller shaft in real time, completing the acquisition of axial movement data. After the test is completed, the first cylinder 17 is depressurized, the spring 22 elastically resets, and pushes the tailstock 23 to drive the push rod 19 back to the initial position, preparing for the next test.

[0028] like Figure 1 and Figure 5 As shown, the turntable 3 has a movable first positioning component 8 and a second positioning component 10 for positioning the turbocharger 9. The upper end face of the turntable 3 has a first guide hole 28 and a second guide hole 29 pre-drilled. The first positioning component 8 is slidably adjusted along the first guide hole 28, and the second positioning component 10 is slidably adjusted along the second guide hole 29.

[0029] Assuming the first positioning component 8 is used to confirm the flange end position of the compressor volute, then the second positioning component 10 is used to confirm the flange end position of the turbine volute. The two positioning components correspond to the flange ends at both ends of the volute, respectively, achieving positioning from both sides to ensure that the turbocharger 9 is installed in a correct posture.

[0030] The installation method and structure of the first positioning component 8 and the second positioning component 10 are the same. Taking the first positioning component 8 as an example, its installation method and structure are described in detail.

[0031] like Figure 5 and Figure 6 As shown, the first positioning component 8 includes a base 36, with a vertical plate 35 at one end of the base 36 for positioning the volute flange end. A through hole 5 is provided on the vertical plate 35. A wedge 31 at the bottom of the base 36 is fitted into the first guide hole 28 of the turntable 3, forming a sliding fit and providing guidance for the adjustment of the first positioning component 8. The lower end face of the turntable 3 has an elongated hole 30 corresponding to the first guide hole 28, the outline of which is larger than the outline of the first guide hole 28.

[0032] The base 36 is fixed in position by a screw 33. A handle 34 is fixed to the top of the screw 33, abutting against the base 36, and a nut 32 is connected to the bottom of the screw 33. The nut 32 is embedded in an elongated hole 30 to restrict its own rotation. The handle 34 allows for manual rotation of the screw 33, and the nut 32 cannot be rotated after being embedded in the elongated hole 30, ensuring that only the screw 33 moves when the thread is tightened, avoiding tightening failure and improving fixing stability.

[0033] like Figure 1 As shown, the stand 1 is provided with two sets of mounting seats 6. On the two sets of mounting seats 6, air guns 7 are movably mounted (such as slidably connected) facing the first positioning component 8 and the second positioning component 10 respectively. The air nozzle of the air gun 7 passes through the through hole 5 and extends into the volute of the turbocharger 9.

[0034] The second sensor 18 is installed on one side of the top plate 12, directly opposite the impeller, and is used to collect data on the distance between the impeller and the volute casing during impeller rotation. During detection, the air gun 7 delivers high-pressure airflow into the impeller from the flange end of any volute casing. The airflow directly acts on the impeller, driving it to rotate around its shaft. If there is a deviation in the impeller shaft installation position, eccentricity will occur during impeller rotation, causing the radial distance between the impeller and the volute casing to change regularly with the rotation period. The second sensor 18 captures the distance change data between the impeller and the volute casing in real time, and judges the existence and degree of installation deviation by analyzing the data fluctuations.

[0035] The purpose of the turntable 3 is to facilitate the adjustment of the first positioning component 8 and the second positioning component 10. When it is necessary to adjust either positioning component, the turntable 3 can be manually rotated to bring the target positioning component to the front. In order to avoid interference during the detection of impeller shaft axial movement and impeller radial clearance, a locking component 2 is also installed on the stand 1 to lock the turntable 3 and restrict the rotation of the turntable 3.

[0036] like Figure 4 As shown, the locking assembly 2 includes a second cylinder 24 and a slide block 25. The second cylinder 24 is fixed to the platform 1, and the outer edge of the turntable 3 is provided with two sets of spaced rollers 26. The slide block 25 is slidably connected to the platform 1. A push rod 27 is fixed on the slide block 25, facing the gap between the two sets of rollers 26, and one end of the push rod 27 is fixedly connected to the push rod of the second cylinder 24.

[0037] A notch (not shown in the figure) is provided on the outer contour of the turntable 3. A position sensor (not shown in the figure) is provided on one side of the locking assembly 2 to detect the position of the notch. The position sensor identifies the position of the notch and, in conjunction with delay logic (such as a 3-second pause to avoid accidental operation), triggers the locking action. The second cylinder 24 is activated, driving the push rod 27 to move. The push rod 27 is precisely engaged in the gap between the two sets of rollers 26 on the outer edge of the turntable 3, restricting the rotational freedom of the turntable 3 and achieving locking positioning. Only after the locking action is triggered can the axial movement detection of the impeller shaft and the radial clearance detection of the impeller be performed.

[0038] The embodiments described above are not exhaustive and do not limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A turbocharger volute housing alignment testing device, comprising a test bench (1) on which a turntable (3) is mounted; characterized in that: The turntable (3) has a movable first positioning component (8) and a second positioning component (10) for positioning the turbocharger (9). The turbocharger (9) has an impeller shaft inside, and an impeller is mounted on the impeller shaft. A support rod (13) is fixed on the turntable (3). A top plate (12) is provided on the top of the support rod (13). A shaft thrust component (11) axially aligned with one end of the top plate (12) is installed at one end of the top plate (12). The turntable (3) is equipped with a center mounting... A first sensor (14) is axially aligned with the other end of the impeller shaft. A second sensor (18) is mounted on one side of the top plate (12) facing the impeller. Two sets of mounting seats (6) are provided on the stand (1). Air guns (7) facing the first positioning component (8) and the second positioning component (10) are respectively movably mounted on the two sets of mounting seats (6). The air nozzle of the air gun (7) passes through the corresponding first positioning component (8) or second positioning component (10) and extends into the volute of the turbocharger (9).

2. The turbocharger volute housing alignment detection device according to claim 1, characterized in that: The shaft thrust assembly (11) includes a first cylinder (17) and a push rod (19). The first cylinder (17) is vertically fixed on the top of the top plate (12). A guide seat (16) is installed at the bottom of the top plate (12). The push rod (19) is coaxial with the impeller shaft and slides in cooperation with the guide seat (16). The first cylinder (17) drives the push rod (19) to apply an axial load to the impeller shaft.

3. The turbocharger volute housing alignment detection device according to claim 2, characterized in that: The guide seat (16) has a movable cavity (20) at one end and a guide cavity (21) communicating with the movable cavity (20) at the other end. The push rod (19) passes through the guide cavity (21) and protrudes from the guide seat (16). The end of the push rod (19) facing the first cylinder (17) has a tail seat (23). The tail seat (23) is located in the movable cavity (20). The push rod (19) is covered with a spring (22). One end of the spring (22) abuts against the tail seat (23), and the other end of the spring (22) abuts against the junction of the movable cavity (20) and the guide cavity (21).

4. The turbocharger volute housing alignment detection device according to claim 1, characterized in that: The turntable (3) has a concave cavity in the center, and a base (4) for fixing the turbocharger (9) is installed in the concave cavity. The first sensor (14) is installed in the center of the base (4), and multiple sets of circumferentially distributed arc-shaped waist holes (15) are provided on the table surface of the base (4).

5. The turbocharger volute housing alignment detection device according to claim 1, characterized in that: The stand (1) is also equipped with a locking assembly (2) for locking the turntable (3) to restrict the rotation of the turntable (3).

6. The turbocharger volute housing alignment detection device according to claim 5, characterized in that: The locking assembly (2) includes a second cylinder (24) and a slide (25). The second cylinder (24) is fixed to the table surface of the frame (1). The outer edge of the turntable (3) is provided with two sets of rollers (26) arranged at intervals. The slide (25) is slidably connected to the frame (1). A push rod (27) is fixed on the slide (25) facing the gap between the two sets of rollers (26). One end of the push rod (27) is fixedly connected to the push rod of the second cylinder (24).

7. The turbocharger volute housing alignment detection device according to claim 1, characterized in that: The upper surface of the turntable (3) is provided with a first guide hole (28) and a second guide hole (29). The first positioning component (8) slides along the first guide hole (28) and the second positioning component (10) slides along the second guide hole (29).

8. The turbocharger volute housing alignment detection device according to claim 7, characterized in that: The first positioning component (8) includes a base (36), one end of which is provided with a vertical plate (35), the vertical plate (35) is provided with a through hole (5) for the air gun (7) to pass through, and the bottom of the base (36) is provided with a wedge (31) adapted to the first guide hole (28).

9. The turbocharger volute housing alignment detection device according to claim 8, characterized in that: The lower end face of the turntable (3) is provided with an elongated hole (30) corresponding to the first guide hole (28). The base (36) is fixed by a screw (33). The top end of the screw (33) is fixed with a handle (34) that abuts against the base (36). The bottom end of the screw (33) is connected to a nut (32). The nut (32) is embedded in the elongated hole (30) to restrict its own rotation.

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