Volute impeller gap detection structure of air compressor

Abstract

The invention relates to an air compressor volute impeller gap detection structure, which comprises a bottom plate, a speed chain, a support, an X-axis module, a Z-axis module, a 3D laser line scanner, a side plate, a connecting plate, an upper end plate and a tray jacking mechanism, and is characterized in that the speed chain is fixed at the upper end of the bottom plate through the connecting plate, the speed chain conveys a tray, the support is fixed on the bottom plate, the X-axis module is fixed on the support through the upper end plate, and the Z-axis module is fixed on the tray jacking mechanism through the side plate. The connecting plate is installed on the X-axis module and connected with the Z-axis module, and the 3D laser line scanner is fixed to the connecting plate through the side plate. According to the air compressor volute impeller gap detection structure, 3D laser line scanning is adopted, the measurement precision is more accurate, position correction and servo control pressing and jacking are supported, the pressure sensor is combined, the detection structure is more accurate, and product parts are prevented from being damaged. The device can detect the clearance between the volute and the impeller and the axial movement size of the rotor in a compatible manner, is simple to operate and high in efficiency, and has a wide application range.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen fuel structures, in particular to the field of hydrogen fuel cells, and specifically refers to an air compressor volute impeller clearance detection structure. Background Art

[0002] The hydrogen fuel structure is a device that directly converts the chemical energy stored in the fuel and oxidant into electrical energy through electrochemical means, and the hydrogen fuel structure requires an air compressor to continuously transport hydrogen to accelerate the supply of hydrogen, thereby increasing power;

[0003] At present, the demand for hydrogen fuel cell structures is increasing, and the demand for air compressors is also increasing. The demand for air compressor production lines is also increasing, and the gap detection between the air compressor volute and the impeller is also very important. The purpose of the gap detection is to ensure that the impeller does not collide with the volute during rotation. The current market method is to place two tin wires on the impeller, then install the volute, and then detect the size after pressing. The efficiency is slow and the detection accuracy is not high. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an air compressor volute impeller clearance detection structure which has high efficiency, high detection accuracy and a wide range of applications.

[0005] In order to achieve the above object, the air compressor volute impeller clearance detection structure of the present invention is as follows:

[0006] The air compressor volute impeller clearance detection structure has the following main features: the structure includes a base plate, a double-speed chain, a support, an X-axis module, a Z-axis module, a 3D laser line scan, a side plate, a connecting plate, an upper end plate, and a pallet lifting mechanism; the double-speed chain is fixed to the upper end of the base plate through the connecting plate; the double-speed chain conveys the pallet; the support is fixed to the base plate; the X-axis module is fixed to the support through the upper end plate; the connecting plate is mounted on the X-axis module and connected to the Z-axis module; the 3D laser line scan is fixed to the connecting plate through the side plate; the pallet lifting mechanism is mounted at the lower end of the base plate; when the pallet is conveyed to the corresponding station of the pallet lifting mechanism through the double-speed chain, the pallet lifting mechanism lifts and positions the pallet; the Z-axis module is used to press it down to the lower end when measuring axial movement, so as to measure the height of the lowest position of the shaft.

[0007] Preferably, the structure also includes a push rod, a lower pressure sensor, a vertical plate, a lower connecting plate and a Z1 module, the lower connecting plate is fixed on the bottom plate, the Z1 module is fixed on the connecting plate, the vertical plate is installed on the Z1 module, the pressure sensor is installed on the vertical plate, and the push rod is fixed on the pressure sensor. When the Z1 module rises, it drives the pressure sensor and the push rod to rise, so that the lower connecting plate lifts the measuring axis to its highest end. The 3D laser line scan detects the height of the lower connecting plate before and after it is lifted, and the difference is the movement of the measuring axis.

[0008] Preferably, the pallet lifting mechanism includes a positioning pin, a positioning plate, a linear bearing, a plate, a cylinder assembly, a guide rod and a limit ring. The plate is fixed on the base plate. Two sets of cylinder assemblies and four linear bearings are installed on the plate. The guide rod is fitted with the linear bearing. A limit ring is installed at the lower end of the guide rod. The upper end of the guide rod is fixed to the positioning plate. The upper end of the cylinder assembly is connected to the positioning plate. The cylinder assembly extends and retracts up and down to drive the positioning plate to move up and down. The positioning pin is installed on the positioning plate so that the pallet lifting mechanism is positioned with the pallet after lifting.

[0009] Preferably, the cylinder assembly is provided with a magnetic switch, and the magnetic switch is used to sense the up and down position of the cylinder assembly.

[0010] Preferably, the structure further comprises a proximity switch, and the proximity switch is connected to the tray lifting mechanism. After the proximity switch senses that the tray has reached the workstation, the tray lifting mechanism lifts the tray to a position.

[0011] Preferably, the structure further comprises an auxiliary plate, an upper pressure sensor and a pressure rod, and the auxiliary plate, the upper pressure sensor and the pressure rod are all mounted on the Z-axis module.

[0012] Preferably, the X-axis module includes a servo motor and two encoders, one encoder is connected to the servo motor for communication and is used to realize a closed-loop stroke of the servo motor, and the other encoder is connected to the 3D laser line scan for feedback signal to the 3D laser line scan for 3D imaging.

[0013] Preferably, the 3D laser line scan diffuses the laser into a line laser through a cylindrical objective lens, and then projects it onto the surface of the target object to form diffuse reflection, so that the reflected light is imaged on the CMOS, and the displacement and shape are measured by detecting changes in position and shape.

[0014] The air compressor volute impeller clearance detection structure of the present invention adopts 3D laser line scanning, with more precise measurement accuracy, supports position correction, servo control down-pressing and lifting, and is more accurate in combination with a pressure sensor to avoid damage to product parts. The present invention is compatible with detecting the volute, impeller clearance and rotor axial movement size, is simple to operate, highly efficient, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the air compressor volute impeller clearance detection structure of the present invention.

[0016] Figure 2 The figure is a structural side view of the air compressor volute impeller clearance detection structure of the present invention.

[0017] Figure 3 It is a structural schematic diagram of the tray lifting mechanism of the air compressor volute impeller clearance detection structure of the present invention.

[0018] Reference numerals:

[0019] 1 Bottom plate

[0020] 2x speed chain

[0021] 3 Pallets

[0022] 4 Support

[0023] 5 X-axis module

[0024] 6 Z-axis module

[0025] 7 Auxiliary board

[0026] 8 3D laser line scan

[0027] 9 Side panels

[0028] 10 Upper pressure sensor

[0029] 11. Pressure rod

[0030] 12 ejector rod

[0031] 13. Pressure sensor

[0032] 14 vertical board

[0033] 15 Connecting plate

[0034] 16 Upper end plate

[0035] 17Proximity switch

[0036] 18 Lower connecting plate

[0037] 19 Pallet lifting mechanism

[0038] 20Z1 Module

[0039] 21 positioning pin

[0040] 22 Positioning plate

[0041] 23Linear bearings

[0042] 24 boards

[0043] 25 cylinder assembly

[0044] 26 Guide rod

[0045] 27 Limiting ring DETAILED DESCRIPTION

[0046] In order to more clearly describe the technical content of the present invention, further description is given below in conjunction with specific embodiments.

[0047] The air compressor volute impeller clearance detection structure of the present invention includes a base plate 1, a speed chain 2, a support 4, an X-axis module 5, a Z-axis module 6, a 3D laser line scan 8, a side plate 9, a connecting plate 15, an upper end plate 16, and a tray lifting mechanism 19. The speed chain 2 is fixed to the upper end of the base plate 1 through the connecting plate, the speed chain 2 conveys the tray 3, the support 4 is fixed on the base plate 1, the X-axis module 5 is fixed to the support 4 through the upper end plate 16, the connecting plate 15 is installed on the X-axis module 5 and connected to the Z-axis module 6, and the 3D laser line scan 8 is fixed on the connecting plate 15 through the side plate 9; the tray lifting mechanism 19 is installed at the lower end of the base plate 1, when the tray 3 is transported to the corresponding station of the tray lifting mechanism 19 through the speed chain 2, the tray lifting mechanism 19 lifts and positions the tray 3, and the Z-axis module 6 is used to press it down to the lower end when measuring axial movement, so as to measure the height of the lowest position of the shaft.

[0048] As a preferred embodiment of the present invention, the structure also includes a push rod 12, a lower pressure sensor 13, a vertical plate 14, a lower connecting plate 18 and a Z1 module 20. The lower connecting plate 18 is fixed on the bottom plate 1, the Z1 module 20 is fixed on the connecting plate 18, the vertical plate 14 is installed on the Z1 module 20, the pressure sensor 13 is installed on the vertical plate 14, and the push rod 12 is fixed on the pressure sensor 13. When the Z1 module 20 rises, it drives the pressure sensor 13 and the push rod 12 to rise, so that the lower connecting plate 18 lifts the measuring axis to its highest end. The 3D laser line scan 8 detects the height of the lower connecting plate 18 before and after it is lifted, and the difference is the movement amount of the measuring axis.

[0049] As a preferred embodiment of the present invention, the pallet lifting mechanism 19 includes a positioning pin 21, a positioning plate 22, a linear bearing 23, a plate 24, a cylinder assembly 25, a guide rod 26 and a limit ring 27. The plate 24 is fixed on the base plate 1. Two sets of cylinder assemblies 25 and four linear bearings 23 are installed on the plate 24. The guide rod 26 is fitted with the linear bearing 23. A limit ring 27 is installed at the lower end of the guide rod 26. The upper end of the guide rod 26 is fixed to the positioning plate 22. The upper end of the cylinder assembly 25 is connected to the positioning plate 22. The cylinder assembly 25 extends and retracts up and down to drive the positioning plate 22 to move up and down. The positioning pin 21 is installed on the positioning plate 22, so that the pallet lifting mechanism 19 is positioned with the pallet 3 after lifting.

[0050] As a preferred embodiment of the present invention, a magnetic switch is disposed on the cylinder assembly 25 , and the magnetic switch is used to sense the upper and lower positions of the cylinder assembly 25 .

[0051] As a preferred embodiment of the present invention, the structure further includes a proximity switch 17, which is connected to a tray lifting mechanism 19. After the proximity switch 17 senses that the tray 3 has reached the workstation, the tray lifting mechanism 19 lifts and positions the tray 3.

[0052] As a preferred embodiment of the present invention, the structure further includes an auxiliary plate 7 , an upper pressure sensor 10 and a pressure rod 11 , and the auxiliary plate 7 , the upper pressure sensor 10 and the pressure rod 11 are all mounted on the Z-axis module 6 .

[0053] As a preferred embodiment of the present invention, the X-axis module 5 includes a servo motor and two encoders, one encoder is connected to the servo motor for communication and is used to realize a closed-loop stroke of the servo motor, and the other encoder is connected to the 3D laser line scan 8 for feedback signal to the 3D laser line scan 8 for 3D imaging.

[0054] As a preferred embodiment of the present invention, the 3D laser line scanner 8 diffuses the laser into a line laser through a cylindrical objective lens, and then projects it onto the surface of the target object to form diffuse reflection. After the reflected light is imaged on the CMOS, the displacement and shape are measured by detecting changes in position and shape.

[0055] In a specific embodiment of the present invention, in order to address the above-mentioned deficiencies in the prior art, a servo motor and module are combined with a Keyence 3D line scan to detect the relative clearance between the impeller and the volute, and the axial play clearance of the rotor can be detected, which is easy to operate and has high precision.

[0056] The present invention uses 3D imaging technology formed by 3D laser line scanning to scan the height lines of the impeller, the reference surface A on the housing, the volute contact coil, and the volute reference surface A1 (A and A1 are contact surfaces), and calculates the difference. The present invention can be integrated into the production line, with high detection efficiency and high detection accuracy, and can also detect the amount of axial clearance movement.

[0057] The device of the present invention comprises a 3D laser line scan 8, a conveying mechanism, a tray lifting mechanism 19, a transverse movement module, a lifting and pressing mechanism, etc.

[0058] The entire invented mechanism is basically fixed and connected by bolts and pins. The speed chain 2 is fixed to the upper end of the base plate 1 through the connecting plate. The speed chain 2 is used to transport the pallet 3 and connect the transfer between the upper and lower workstations. The speed chain 2 is equipped with a stop mechanism; the pallet lifting mechanism 19 is located at the lower end of the base plate 1. Its function is to lift and position the pallet 3 when it is transferred to this workstation through the speed chain 2 to prevent it from moving and ensure its measurement accuracy and consistency; the proximity switch 17 senses that the pallet 3 is in place and then feedbacks the signal through the PLC structure, which is linked with the pallet lifting mechanism 19.

[0059] The test part of the present invention is installed on the upper end of the base plate 1, the support 4 is fixed on the base plate 1, and the X-axis module 5 is fixed on the support 4 through the upper end plate 16. The X-axis module 5 adopts a servo motor, and the structural hole control accuracy is higher. The X-axis module 5 adopts a dual encoder configuration, one communicates with the servo motor in a closed-loop stroke, and the other feeds back a signal to the 3D laser line scan 8 to achieve 3D imaging.

[0060] The connecting plate 15 is installed on the X-axis module 5 and connected to the Z-axis module 6. At the same time, the 3D laser line scan 8 is fixed on the connecting plate 15 through the side plate 9, so that it can move accurately in the X-axis direction; the 3D laser line scan 8 adopts the Keyence LJ-X8000 series. Its measurement principle is to diffuse the laser into a line laser through a cylindrical objective lens, and then project it onto the surface of the target object to form diffuse reflection. After the reflected light is imaged on the CMOS, the displacement and shape are measured by detecting the changes in position and shape. The detection accuracy in the Z-axis direction is ±3μm;

[0061] The Z-axis module 6 is installed with an auxiliary plate 7, an upper pressure sensor 10 and a pressure rod 11, which are used to press it down to the lower end when measuring the axial movement and measure the height of the lowest position of the axis; the lower connecting plate 18 is fixed to the bottom plate 1, and the Z1 module 20, the vertical plate 14, the lower pressure sensor 13 and the push rod 12 are installed on the lower connecting plate 18, so that the measuring axis is lifted to its highest end, and the 3D laser line scan 8 detects the height of the two, and the difference is the movement of the measuring axis;

[0062] Pallet lifting mechanism 19: Two sets of cylinder assemblies 25 and four linear bearings 23 are installed on the plate 24, the guide rod 26 is fitted with the linear bearing 23, a limit ring 27 is installed at the lower end, and the upper end is fixed on the positioning plate 22; the upper end of the cylinder assembly 25 is connected to the positioning plate 22, and the plate 24 is fixed on the bottom plate 1. The extension and retraction of the cylinder assembly 25 can make the positioning plate 22 move up and down. The cylinder assembly 25 is equipped with a magnetic switch to sense its up and down position; the positioning pin 21 is installed on the positioning plate 22 to enable the pallet lifting mechanism 19 to be better positioned with the pallet 3 after being lifted.

[0063] The operation steps of the present invention are as follows:

[0064] 1. When the pallet 3 reaches this station through the speed chain 2 (the air compressor has installed the impeller), the proximity switch 17 senses that it has reached the specified position and feeds back a signal to the PLC structure, so that the pallet lifting mechanism 19 lifts and positions the pallet 3; the volute corresponding to the impeller end is manually placed on the right side of the pallet tooling, and the start button is pressed. The servo module uses a 3D laser line scan 8 to perform dimensional inspection on both sides of the impeller and the volute, and then the data is automatically calculated after passing through the PLC structure and soft landing to obtain the gap between the two.

[0065] 2. The upper pressure shaft presses the rotor down, and the servo module uses a 3D laser line scan to detect the size of the upper end of the rotor. The lower pressure shaft pushes the rotor up, and the servo module uses a 3D laser line scan to detect the size of the upper end of the rotor. The difference between the two is the axial movement of the air compressor rotor.

[0066] 3. After the inspection is completed, the structure determines whether the results are qualified and whether it needs to be repaired.

[0067] The specific implementation scheme of this embodiment can refer to the relevant description in the above embodiment, which will not be repeated here.

[0068] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0069] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0071] The air compressor volute impeller clearance detection structure of the present invention is adopted, and 3D laser line scanning 8 is adopted, the measurement accuracy is more accurate, position correction is supported, servo control is pressed down and lifted, and the pressure sensor is combined to be more accurate to avoid damage to product parts. The present invention is compatible with the detection of volute, impeller clearance and rotor axial movement size, simple operation, high efficiency, and has a wide range of applications.

[0072] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it is apparent that various modifications and variations may be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be regarded as illustrative rather than restrictive.

Claims

1. An air compressor volute impeller clearance detection structure, characterized in that: The structure includes a base plate, a double-speed chain, a support, an X-axis module, a Z-axis module, a 3D laser line scanner, a side plate, a connecting plate, an upper end plate, and a pallet lifting mechanism. The double-speed chain is fixed to the upper end of the base plate through the connecting plate, the double-speed chain conveys the pallet, the support is fixed to the base plate, the X-axis module is fixed to the support through the upper end plate, the connecting plate is installed on the X-axis module and connected to the Z-axis module, and the 3D laser line scanner is fixed to the connecting plate through the side plate; the pallet lifting mechanism is installed at the lower end of the base plate, and when the pallet is transported to the corresponding workstation of the pallet lifting mechanism through the double-speed chain, the pallet lifting mechanism lifts the pallet to position it, and the Z-axis module is used to press it down to the lower end when measuring axial movement, so as to measure the height of the lowest position of the axis.

2. The air compressor volute impeller clearance detection structure according to claim 1, characterized in that: The structure also includes a push rod, a lower pressure sensor, a vertical plate, a lower connecting plate and a Z1 module. The lower connecting plate is fixed on the bottom plate, the Z1 module is fixed on the connecting plate, the vertical plate is installed on the Z1 module, the pressure sensor is installed on the vertical plate, and the push rod is fixed on the pressure sensor. When the Z1 module rises, it drives the pressure sensor and the push rod to rise, so that the lower connecting plate lifts the measuring axis to its highest end. The 3D laser line scan detects the height of the lower connecting plate before and after it is lifted, and the difference is the movement of the measuring axis.

3. The air compressor volute impeller clearance detection structure according to claim 1, characterized in that: The pallet lifting mechanism includes a positioning pin, a positioning plate, a linear bearing, a plate, a cylinder assembly, a guide rod and a limit ring. The plate is fixed on the base plate. Two sets of cylinder assemblies and four linear bearings are installed on the plate. The guide rod is fitted with the linear bearing. A limit ring is installed at the lower end of the guide rod. The upper end of the guide rod is fixed to the positioning plate. The upper end of the cylinder assembly is connected to the positioning plate. The cylinder assembly extends and retracts up and down to drive the positioning plate to move up and down. The positioning pin is installed on the positioning plate so that the pallet lifting mechanism is positioned with the pallet after lifting.

4. The air compressor volute impeller clearance detection structure according to claim 3, characterized in that: The cylinder assembly is provided with a magnetic switch, and the magnetic switch is used to sense the up and down positions of the cylinder assembly.

5. The air compressor volute impeller clearance detection structure according to claim 1, characterized in that: The structure also includes a proximity switch, which is connected to the tray lifting mechanism. After the proximity switch senses that the tray has reached the workstation, the tray lifting mechanism lifts the tray to a position.

6. The air compressor volute impeller clearance detection structure according to claim 1, characterized in that: The structure also includes an auxiliary plate, an upper pressure sensor and a pressure rod, and the auxiliary plate, the upper pressure sensor and the pressure rod are all installed on the Z-axis module.

7. The air compressor volute impeller clearance detection structure according to claim 1, characterized in that: The X-axis module includes a servo motor and two encoders. One encoder is connected to the servo motor for communication and is used to realize a closed-loop stroke of the servo motor. The other encoder is connected to the 3D laser line scan and is used to feed back signals to the 3D laser line scan for 3D imaging.

8. The air compressor volute impeller clearance detection structure according to claim 1, characterized in that: The 3D laser line scan diffuses the laser into a line laser through a cylindrical objective lens, and then projects it onto the surface of the target object to form diffuse reflection. After the reflected light is imaged on the CMOS, the displacement and shape are measured by detecting changes in position and shape.

Images