Blade hardness detection device of light-weight vane pump

Abstract

The invention belongs to the technical field of water pump blade detection, and particularly relates to a blade hardness detection device of a light-weight vane pump, which comprises a working table, and a mounting frame is fixed on the working table; the blade positioning assembly comprises a center base located above the workbench, the bottom of the center base is provided with an inverted-circular-truncated-cone-shaped guide column matched with a center mounting hole of the vane pump, a mounting rod is rotationally connected to the center base, and the upper end of the mounting rod is slidably connected to the mounting frame in a penetrating mode; a hydraulic cylinder used for driving the center base to ascend and descend is arranged on the mounting frame, six positioning rods are arranged on the center base in the circumferential direction in an array mode, positioning gears are fixed to the six positioning rods through rotating shafts, and the rotating shafts are rotationally connected to the center base. According to the invention, continuous detection can be carried out on different positions of the blade, and fixation and detection work of the blade are linked, synchronized and tightly matched, so that improvement of the detection effect and the detection accuracy is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of water pump blade detection, and in particular relates to a blade hardness detection device for a lightweight vane pump. Background Art

[0002] Lightweight vane pumps are optimized in design and manufacturing to reduce weight and volume while maintaining or improving performance. Their working principle is to generate negative pressure and pressure difference through the rotation of the vanes, thereby sucking and discharging liquid into and out of the hydraulic system. Among them, the single-acting vane pump is mainly composed of a valve plate, a drive shaft, a rotor, a stator and blades. The inner surface of the stator is a cylindrical surface, and there is an eccentric distance between the rotor and the stator center. The blades are installed in the rotor slots and can slide freely in the slots. When the drive shaft drives the rotor to rotate, under the action of centrifugal force and oil pressure at the root of the blades, the top of the blades clings to the inner surface of the stator, forming a closed working chamber.

[0003] In the prior art, for example, a water pump blade hardness detection device disclosed in patent publication number CN117554220B includes a frame, a workbench and an impeller positioning mechanism. A mounting frame is provided on the workbench, to which a mounting shaft is fixedly connected. The mounting shaft is connected to a detection rod that is arranged to rotate around its outer circumference. In this scheme, the water pump blade hardness detection device can realize multi-point hardness detection of the blade by positioning the water pump impeller once.

[0004] However, the detection device in the above scheme has the following problems when detecting the vane pump: In the above solution, the impeller is fixed by a clamping arm. However, since the blades in the lightweight vane pump can slide freely in the rotor slots, there is still a situation in which the blades slide during the hardness test, causing the test position to change, affecting the test accuracy. Moreover, the detection process of this scheme is to first fix the impeller, and then detect various parts of the blade by controlling the movement of the detection probe. The fixing and detection operations of the impeller need to be carried out in sequence. When performing multi-point detection, the operation is cumbersome, which is not conducive to improving the detection efficiency. Summary of the Invention

[0005] The object of the present invention is to provide a blade hardness detection device for a lightweight vane pump in response to the problems raised in the above background technology.

[0006] To achieve the above object, the present invention adopts the following technical solutions: a blade hardness detection device for a lightweight vane pump, comprising a workbench, on which a mounting frame is fixed; The blade positioning assembly includes a center seat located above the workbench, the bottom of the center seat is provided with an inverted frustum-shaped guide column matching the center mounting hole of the vane pump, the center seat is rotatably connected to a mounting rod, the upper end of the mounting rod is slidably connected to the mounting frame, the mounting frame is provided with a hydraulic cylinder for driving the center seat to lift, six positioning rods are arranged in a circumferential array on the center seat, and positioning gears are fixed on the six positioning rods through a rotating shaft, the rotating shaft is rotatably connected to the center seat, the center seat is rotatably connected to a center gear, the center gear is coaxially fixed with the mounting rod, the six positioning gears are all meshed with the center gear, and a clamping unit is provided on the end of the positioning rod away from the center seat; A hardness detection component includes an annular enclosure coaxial with the center seat, the annular enclosure is rotatably connected to the workbench, six detection units are arranged in a circumferential array on the annular enclosure, a motor for driving the annular enclosure to rotate is installed in the workbench, and a transmission unit for driving the mounting rod to rotate synchronously is provided on one side of the annular enclosure.

[0007] Furthermore, the pressing unit includes a sliding groove provided on the positioning rod, a mounting block is slidably connected in the sliding groove, and a push rod is fixed on the mounting block.

[0008] Furthermore, a negative pressure chamber is provided on the bottom surface of the center seat at the position of the rotating shaft, the lower end of the rotating shaft extends into the negative pressure chamber, and a thread is provided on the surface of one end of the rotating shaft located in the negative pressure chamber, a sliding plate is slidably connected in the negative pressure chamber, the rotating shaft passes through the sliding plate and is threadedly engaged with the sliding plate, a suction cup is provided at the lower end opening of the bottom of the negative pressure chamber, the sliding plate is fixed with a piston by a connecting rod, and the piston slides sealably in the negative pressure chamber.

[0009] Furthermore, the detection unit includes a threaded sleeve fixed on the annular enclosure, a pitch adjusting rod is provided in the threaded sleeve, a thread matching the threaded sleeve is provided on the surface of the pitch adjusting rod, a rotating sleeve is provided on the end of the pitch adjusting rod, a detection probe is installed on the rotating sleeve, and a positioning bolt is provided on the rotating sleeve.

[0010] Furthermore, a driving shaft is interference-fitted on the output shaft of the motor, a driving gear is fixed on the driving shaft, an annular tooth groove is provided along the peripheral side wall of the annular enclosure, and the driving gear is meshed with the annular tooth groove outside the annular enclosure.

[0011] Furthermore, the transmission unit includes a transmission shaft rotatably connected to the workbench, a driven gear is fixed on the transmission shaft, the driven gear is engaged with the annular tooth groove outside the annular enclosure, and the transmission shaft is connected to the mounting rod through a pulley structure.

[0012] Furthermore, the pulley structure includes a first pulley and a second pulley, the first pulley and the second pulley are connected by a belt, the first pulley is fixed to the transmission shaft, and the second pulley is fixed to the mounting rod through a one-way bearing.

[0013] Furthermore, the outer ring of the one-way bearing is fixed to the second pulley, and the inner ring of the one-way bearing is fixed with a sliding sleeve, and the sliding sleeve is slidably connected to the mounting rod, and the mounting rod is fixed with a flat key extending along its axial direction, and the sliding sleeve is provided with a sliding groove matching the flat key.

[0014] Compared with the existing technology, the advantages of this lightweight vane pump blade hardness detection device are: The present invention provides a central gear and six groups of positioning gears, positioning rods, and a clamping unit. The central gear can synchronously drive the six positioning rods to deflect, and the clamping unit can realize the clamping of the six blade ends in the lightweight vane pump, thereby preventing the blades from being stuck in the rotor slot during the detection process, affecting the accuracy of the detection results, and realizing synchronous hardness detection of multiple blades, which is beneficial to improving the detection efficiency.

[0015] The present invention provides a sliding plate, a piston and a suction cup, and uses a positioning rod as a driving force. When the positioning rod is deflected to press and position the blade, it will automatically drive the piston to move upward in the negative pressure chamber to form negative pressure. The suction cup adsorbs the rotor surface of the vane pump to achieve positioning of the rotor, further preventing it from deflecting during the detection process, and ensuring accurate detection results.

[0016] The present invention is provided with a mounting rod, an annular enclosure and a transmission unit. In a detection cycle, the motor drives the annular enclosure to rotate through the driving gear, so that the detection unit approaches the blade to be detected. During the rotation of the annular enclosure, the positioning rod is driven to deflect synchronously through the transmission unit. After the push rod contacts the blade, it pushes the blade to move along the rotor slot in a direction away from each other. When the push rod and the detection unit are in contact with the blade, the blade is pressed and positioned. At this time, the hardness of the blade is detected by the detection unit; after the detection is completed, the motor is reversed to make the annular enclosure rotate in the opposite direction. At this time, the detection unit moves in a direction away from the blade. In this direction, the one-way bearing can rotate freely, and the mounting rod does not rotate, that is, the push rod always keeps in contact with the blade and does not move. In the next detection cycle, the motor rotates forward again for a distance. At this time, the push rod pushes the blade along the rotor slot in a direction away from each other for a distance again. The detection unit then contacts the next position of the blade again. This reciprocating process can realize continuous detection of different positions of the blade, and the fixing and detection work of the blade are linked and synchronized, and closely coordinated, which is conducive to improving the detection effect and detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a structural schematic diagram of a blade hardness detection device for a lightweight vane pump provided by the present invention when not in operation; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic structural diagram of a blade hardness detection device for a lightweight vane pump provided by the present invention when in operation; Figure 4 yes Figure 3 Enlarged view of point B in the middle; Figure 5 This is a structural schematic diagram from another angle of a device for detecting blade hardness of a lightweight vane pump provided by the present invention; Figure 6 This is a structural schematic diagram of a positioning component in a blade hardness detection device for a lightweight vane pump provided by the present invention; Figure 7 It is a structural schematic diagram of a hardness detection component in a blade hardness detection device for a lightweight vane pump provided by the present invention; Figure 8 It is a front cross-sectional structural diagram of a positioning assembly in a blade hardness detection device for a lightweight vane pump provided by the present invention; Figure 9 yes Figure 8 Enlarged view of point C in the middle; Figure 10 It is a front cross-sectional structural schematic diagram of a sleeve portion in a blade hardness detection device for a lightweight vane pump provided by the present invention.

[0018] In the figure, 1 is a workbench, 2 is a mounting frame, 3 is a center seat, 4 is a guide column, 5 is a mounting rod, 6 is a hydraulic cylinder, 7 is a positioning rod, 8 is a rotating shaft, 9 is a positioning gear, 10 is a center gear, 11 is an annular enclosure, 12 is a motor, 13 is a slide, 14 is a mounting block, 15 is a push rod, 16 is a negative pressure chamber, 17 is a sliding plate, 18 is a suction cup, 19 is a piston, 20 is a threaded sleeve, 21 is a pitch adjusting rod, 22 is a rotating sleeve, 23 is a detection probe, 24 is a positioning bolt, 25 is a driving shaft, 26 is a driving gear, 27 is an annular tooth groove, 28 is a transmission shaft, 29 is a driven gear, 30 is a first pulley, 31 is a second pulley, 32 is a one-way bearing, 33 is a sliding sleeve, 34 is a flat key, 35 is a rotor, 36 is a blade, and 37 is a rotor groove. DETAILED DESCRIPTION

[0019] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0020] like Figure 1-10 As shown, a blade hardness detection device for a lightweight vane pump includes a workbench 1, a blade positioning assembly and a hardness detection assembly, and a mounting frame 2 is fixed on the workbench 1.

[0021] The blade positioning assembly includes a center seat 3 located above the workbench 1, and an inverted frustum-shaped guide column 4 matching the center mounting hole of the vane pump is provided at the bottom of the center seat 3. A mounting rod 5 is rotatably connected to the center seat 3, and the upper end of the mounting rod 5 is slidably connected to the mounting frame 2. The mounting frame 2 is provided with a hydraulic cylinder 6 for driving the center seat 3 to rise and fall. Six positioning rods 7 are arranged in a circumferential array on the center seat 3, and positioning gears 9 are fixed on the six positioning rods 7 through a rotating shaft 8. The rotating shaft 8 is rotatably connected to the center seat 3, and a center gear 10 is rotatably connected to the center seat 3. The center gear 10 is coaxially fixed with the mounting rod 5, and the six positioning gears 9 are all meshed with the center gear 10. A clamping unit is provided at the end of the positioning rod 7 away from the center seat 3; The six positioning rods 7 can be synchronously driven to deflect through the central gear 10, and the six blade ends in the lightweight vane pump can be clamped through the clamping unit to prevent the blades from being stuck in the rotor slot during the inspection process, affecting the accuracy of the inspection results. It can also realize synchronous hardness inspection of multiple blades, which is beneficial to improving the inspection efficiency.

[0022] The hardness detection assembly includes an annular enclosure 11 coaxial with the center seat 3. The annular enclosure 11 is rotatably connected to the workbench 1. Six detection units are arranged in an array on the annular enclosure 11. A motor 12 for driving the annular enclosure 11 to rotate is installed in the workbench 1. A transmission unit is provided on one side of the annular enclosure 11 to drive the mounting rod 5 to rotate synchronously.

[0023] The pressing unit includes a sliding groove 13 provided on the positioning rod 7 , a mounting block 14 is slidably connected in the sliding groove 13 , and a push rod 15 is fixed on the mounting block 14 .

[0024] A negative pressure chamber 16 is provided on the bottom surface of the center seat 3 at the position of the rotating shaft 8. The lower end of the rotating shaft 8 extends into the negative pressure chamber 16, and a thread is provided on one end surface of the rotating shaft 8 located in the negative pressure chamber 16. A sliding plate 17 is slidably connected to the negative pressure chamber 16. The rotating shaft 8 passes through the sliding plate 17 and is threadedly engaged with the sliding plate 17. A suction cup 18 is provided at the lower end opening of the bottom of the negative pressure chamber 16. The sliding plate 17 is fixed with a piston 19 by a connecting rod. The piston 19 slides sealingly in the negative pressure chamber 16. With the positioning rod 7 as the driving force, when the positioning rod 7 is deflected to press and position the blade, the piston 19 will automatically move upward in the negative pressure chamber 16 to form negative pressure. The suction cup 18 adsorbs the rotor surface of the vane pump to achieve positioning of the rotor, further preventing it from shifting during the detection process and ensuring accurate detection results.

[0025] The detection unit includes a threaded sleeve 20 fixed on the annular enclosure 11, and a pitch-adjusting rod 21 is provided in the threaded sleeve 20. The surface of the pitch-adjusting rod 21 is provided with a thread matching the threaded sleeve 20, and the end of the pitch-adjusting rod 21 is provided with a rotating sleeve 22. A detection probe 23 is installed on the rotating sleeve 22, and a positioning bolt 24 is provided on the rotating sleeve 22. By rotating the pitch-adjusting rod 21, the detection probe can be adjusted to a suitable detection position. By twisting the rotating sleeve 22, the detection probe 23 is made to face the surface of the blade to be detected. The rotating sleeve 22 is fixed by the positioning bolt 24, so that the position of the detection probe 23 is fixed for detection work.

[0026] A drive shaft 25 is interference fit on the output shaft of the motor 12, and a driving gear 26 is fixed on the drive shaft 25. An annular tooth groove 27 is opened along the peripheral side wall of the annular enclosure 11, and the driving gear 26 meshes with the annular tooth groove 27 outside the annular enclosure 11.

[0027] The transmission unit includes a transmission shaft 28 rotatably connected to the workbench 1, a driven gear 29 is fixed on the transmission shaft 28, the driven gear 29 is engaged with the annular tooth groove 27 outside the annular enclosure 11, and the transmission shaft 28 is connected to the mounting rod 5 through a pulley structure.

[0028] The pulley structure includes a first pulley 30 and a second pulley 31. The first pulley 30 and the second pulley 31 are connected by a belt. The first pulley 30 is fixed to the transmission shaft 28, and the second pulley 31 is fixed to the mounting rod 5 through a one-way bearing 32. It should be noted that the setting of the one-way bearing 32 enables the second pulley 31 to drive the mounting rod 5 to rotate synchronously in one direction, and the second pulley 31 will rotate freely in the opposite direction and cannot drive the mounting rod 5 to rotate; The outer ring of the one-way bearing 32 is fixed to the second pulley 31, and the inner ring of the one-way bearing 32 is fixed with a sliding sleeve 33. The sliding sleeve 33 is slidably connected to the mounting rod 5. The mounting rod 5 is fixed with a flat key 34 extending along its axial direction. The sliding sleeve 33 is provided with a sliding groove matching the flat key 34. The arrangement of the flat key 34 allows the mounting rod 5 to slide along its axial direction, and the sliding sleeve 33 drives the mounting rod 5 to rotate synchronously. During a detection cycle, the motor 12 drives the annular enclosure 11 to rotate through the driving gear 26, so that the detection unit approaches the blade to be detected. During the rotation of the annular enclosure 11, the positioning rod 7 is synchronously deflected through the transmission unit. After the push rod 15 contacts the blade, it pushes the blade to move away from each other along the rotor slot. When the push rod 15 and the detection unit are in contact with the blade, the blade is pressed and positioned. At this time, the hardness of the blade is tested by the detection unit. After the test is completed, the motor 12 is reversed, so that the annular enclosure 11 rotates in the opposite direction. At this time, the detection unit moves away from the blade. In this direction, the one-way bearing 32 can rotate freely, and the mounting rod 5 does not rotate, that is, the push rod 15 always keeps in contact with the blade and does not move. In the next detection cycle, the motor 12 rotates forward again for a distance. At this time, the push rod 15 pushes the blade away from each other along the rotor slot for a distance again. The detection unit then contacts the next position of the blade again. This reciprocating process can achieve continuous detection of different positions of the blade. In addition, the fixing and detection work of the blade are linked and synchronized, and closely coordinated, which is conducive to improving the detection effect and detection accuracy.

[0029] When the present invention is working, the rotor 35 of the vane pump to be tested is placed in the middle of the annular enclosure 11 on the workbench 1, the hydraulic cylinder 6 is started to drive the center seat 3 to move downward, the guide column 4 enters the shaft mounting hole in the middle of the vane pump rotor 35, the center seat 3 is pressed tightly against the surface of the rotor 35, the six push rods 15 are inserted into the rotor slot 37, and after the detection probe 23 is adjusted to a suitable position, the starting motor 12 drives the annular enclosure 11 to rotate through the driving gear 26, so that the detection probe 23 approaches the direction of the blade 36 to be tested. During the rotation of the annular enclosure 11, the driven gear 29 is driven to rotate, and the driven gear 29 is driven by the transmission shaft. 28 drives the first pulley 30 to rotate, and under the action of the belt, drives the second pulley 31 to rotate. In this direction, the one-way bearing 32 is locked, and the second pulley 31 drives the mounting rod 5 to rotate synchronously. Since the six positioning gears 9 are all engaged with the central gear 10, the mounting rod 5 drives the six positioning rods 7 to deflect synchronously in the direction away from each other. After the push rod 15 contacts the blade, it pushes the blade 36 to move along the rotor slot 37 in the direction away from each other. When the push rod 15 and the detection unit are in contact with the blade 36, the blade 36 is pressed and positioned. At this time, the hardness of the blade 36 is tested by the detection unit. After the detection is completed, the motor 12 reverses, causing the annular enclosure 11 to rotate in the opposite direction. At this time, the detection probe 23 moves in the direction away from the blade 36, and the annular enclosure 11 drives the driven gear 29 to rotate in the opposite direction. In this direction, the one-way bearing 32 can rotate freely, and the mounting rod 5 does not rotate, that is, the push rod 15 always remains in contact with the blade 36 and does not move. In the next detection cycle, the motor 12 rotates forward for a distance again. At this time, the push rod 15 pushes the blade 36 along the rotor slot 37 in the direction away from each other for a distance again. The detection unit then contacts the next position of the blade 36 again. This reciprocating process can achieve continuous detection of different positions of the blade 36, and the fixation and detection of the blade 36 are synchronized and closely coordinated, which is conducive to improving the detection effect and detection accuracy.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A blade hardness detection device for a lightweight vane pump, characterized in that: include: A workbench (1), wherein a mounting frame (2) is fixed on the workbench (1); A blade positioning assembly, the blade positioning assembly includes a center seat (3) located above a workbench (1), a bottom of the center seat (3) is provided with an inverted truncated cone-shaped guide column (4) that matches the center mounting hole of the blade pump, a mounting rod (5) is rotatably connected to the center seat (3), the upper end of the mounting rod (5) is slidably connected to the mounting frame (2), the mounting frame (2) is provided with a hydraulic cylinder (6) for driving the center seat (3) to rise and fall, six positioning rods (7) are arranged in a circumferential array on the center seat (3), and the six positioning rods (7) are all connected by a rotating shaft (8) A positioning gear (9) is fixed, the rotating shaft (8) is rotatably connected to the center seat (3), the center seat (3) is rotatably connected to a center gear (10), the center gear (10) is coaxially fixed to the mounting rod (5), the six positioning gears (9) are all meshed with the center gear (10), the end of the positioning rod (7) away from the center seat (3) is provided with a clamping unit, the clamping unit includes a slide groove (13) provided on the positioning rod (7), a mounting block (14) is slidably connected in the slide groove (13), and a push rod (15) is fixed to the mounting block (14); A hardness detection component, the hardness detection component includes an annular enclosure (11) coaxial with the center seat (3), the annular enclosure (11) is rotatably connected to the workbench (1), six detection units are arranged in a circumferential array on the annular enclosure (11), a motor (12) for driving the annular enclosure (11) to rotate is installed in the workbench (1), and a transmission unit for driving the mounting rod (5) to rotate synchronously is provided on one side of the annular enclosure (11).

2. The blade hardness detection device for a lightweight vane pump according to claim 1, characterized in that: The bottom surface of the center seat (3) is provided with a negative pressure chamber (16) at the position of the rotating shaft (8), the lower end of the rotating shaft (8) extends into the negative pressure chamber (16), and the surface of one end of the rotating shaft (8) located in the negative pressure chamber (16) is provided with a thread, a sliding plate (17) is slidably connected in the negative pressure chamber (16), the rotating shaft (8) passes through the sliding plate (17) and is threadedly engaged with the sliding plate (17), a suction cup (18) is provided at the lower end opening of the bottom of the negative pressure chamber (16), the sliding plate (17) is fixed with a piston (19) through a connecting rod, and the piston (19) slides sealingly in the negative pressure chamber (16).

3. The blade hardness detection device for a lightweight vane pump according to claim 1, characterized in that: The detection unit comprises a threaded sleeve (20) fixed on the annular enclosure (11), a pitch-adjusting rod (21) is provided in the threaded sleeve (20), a surface of the pitch-adjusting rod (21) is provided with a thread matching the threaded sleeve (20), an end of the pitch-adjusting rod (21) is provided with a rotating sleeve (22), a detection probe (23) is mounted on the rotating sleeve (22), and a positioning bolt (24) is provided on the rotating sleeve (22).

4. The blade hardness detection device for a lightweight vane pump according to claim 1, characterized in that: A driving shaft (25) is interference-fitted on the output shaft of the motor (12), a driving gear (26) is fixed on the driving shaft (25), an annular tooth groove (27) is formed on the outer side wall of the annular enclosure (11), and the driving gear (26) and the annular tooth groove (27) outside the annular enclosure (11) are meshed with each other.

5. The blade hardness detection device for a lightweight vane pump according to claim 1, characterized in that: The transmission unit includes a transmission shaft (28) rotatably connected to the workbench (1), a driven gear (29) is fixed to the transmission shaft (28), the driven gear (29) is meshed with an annular tooth groove (27) outside the annular enclosure (11), and the transmission shaft (28) is connected to the mounting rod (5) through a pulley structure.

6. The blade hardness detection device for a lightweight vane pump according to claim 5, characterized in that: The pulley structure comprises a first pulley (30) and a second pulley (31), wherein the first pulley (30) and the second pulley (31) are connected via a belt, the first pulley (30) is fixed to the transmission shaft (28), and the second pulley (31) is fixed to the mounting rod (5) via a one-way bearing (32).

7. The blade hardness detection device for a lightweight vane pump according to claim 6, characterized in that: The outer ring of the one-way bearing (32) is fixed to the second pulley (31), and the inner ring of the one-way bearing (32) is fixed with a sliding sleeve (33). The sliding sleeve (33) is slidably sleeved on the mounting rod (5). The mounting rod (5) is fixed with a flat key (34) extending along its axial direction, and the sliding sleeve (33) is provided with a sliding groove matching the flat key (34).

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