Hydraulic pump blade arc symmetry degree detection device and method

Abstract

The invention discloses a hydraulic pump blade arc symmetry degree detection device and method, and relates to the technical field of blade detection. Through the arrangement of the detection execution assembly, when the projection mode is used for detection, the positions of first conductive plates in a plurality of scale rod assemblies are set according to the arc-shaped surface contour track of the standard hydraulic pump blade, and the hydraulic pump blade with the standard size is placed in a blade carrier for correction detection before detection; the first conductive plates at multiple positions can just enter the mounting grooves at the corresponding positions, so that a circuit where the indicator lamps are located is conducted, and on this basis, if all the indicator lamps can be lightened in the detection process of the hydraulic pump blade to be detected subsequently, the hydraulic pump blade is qualified, otherwise, the hydraulic pump blade to be detected is unqualified. The two detection modes can verify each other, so that the accuracy of detection result output is greatly improved, secondary verification of the detection result is not needed, and the verification time of the detection result is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of blade detection, and in particular to a device and method for detecting circular arc symmetry of hydraulic pump blades. Background Art

[0002] In a hydraulic pump, the blades mate with the arc curves of the stator's inner surface to achieve oil suction and discharge. Blade arc symmetry describes the degree of symmetry in the geometry and position of the blade's arc. Specifically, it requires that the blade's arc curve maintains high consistency in shape, radius, and position on both sides (or relative to a centerline). This ensures that the blades mate smoothly and accurately with the stator arc during rotation, ensuring proper operation of the hydraulic pump. Therefore, after manufacturing, hydraulic pump blades must pass arc symmetry testing before being assembled into the pump.

[0003] A circular knitting machine triangular arc symmetry detection device disclosed in the patent application with reference publication number CN222670954U can push the slider through the threaded transmission of the adjusting rod and the connecting bar, and the slider can cooperate with the guide plate to drive the connecting arm so that the connecting arm pushes the moving bar. In this way, the rollers arranged at three places on the side of the moving bar can efficiently clamp the knitting needles and ensure that the knitting needles are in a flat detection state.

[0004] The arc symmetry detection device in the prior art has the following defects in actual use: 1) The existing arc symmetry detection device requires the previous product to be removed and replaced with a new product before the test can be carried out. The detection device cannot work during the disassembly and assembly process, which delays a lot of detection time and significantly reduces the detection efficiency. It is not suitable for batch product testing; 2) The arc symmetry detection device can only output a single test result, and it is difficult to judge the accuracy of the test result. The test result cannot be verified while the product is being tested. The test result can only be verified by re-testing. Although the re-testing method can meet the needs, it will delay the test progress and reduce the test efficiency.

[0005] Therefore, the present invention proposes a device and method for detecting the circular arc symmetry of hydraulic pump blades to solve the above problems. Summary of the Invention

[0006] In response to the deficiencies in the prior art, the present invention provides a device and method for detecting the circular arc symmetry of hydraulic pump blades, which solves the problem that the existing circular arc symmetry detection device needs to remove the previous detection product and replace the new product before detection can be carried out during the detection process. The detection device cannot work during the disassembly and assembly of the detection product, thereby wasting a lot of detection time and causing a significant decrease in detection efficiency. It is not suitable for batch product inspection. In addition, the circular arc symmetry detection device can only output a single detection result, making it difficult to judge the accuracy of the detection result. The detection result cannot be verified while the product is being inspected, and the accuracy of the detection result can only be verified by re-inspection. Although the re-inspection method can meet the needs, it will delay the detection progress and reduce the detection efficiency.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a device for detecting the circular arc symmetry of hydraulic pump blades, comprising a detection box and a discharge window and a pick-up window respectively provided on the front and back of the detection box, wherein the discharge window and the pick-up window are each provided with a protective door rotatably provided by a hinge, and further comprising: A rotating table is rotatably arranged inside the test box and driven by a servo motor to carry the hydraulic pump blades to be tested; Multiple detection mechanisms are evenly arranged on the top of the rotating table, and are used to simultaneously detect the arc symmetry of the hydraulic pump blades using two detection methods. The results of the two detection methods are mutually verified to determine the accuracy of the detection results. An arc-shaped protrusion is also fixed on one side of the top of the inner cavity of the detection box for driving the detection mechanism to separate from the hydraulic pump blades; The detection result recording mechanism is arranged on the inner cavity side wall of the detection box, and is used to drive the detection mechanism to perform the arc symmetry detection operation of the pressure pump blade, record the detection results, and transmit the detection results to the terminal device for analysis.

[0008] Furthermore, the detection mechanism includes a base that is detachably arranged on the top of the rotating table, and the top of the base is respectively provided with a blade carrier, a detection execution component and a display component. The blade carrier is used to position the hydraulic pump blade to be detected to determine the posture of the hydraulic pump blade during detection. The detection execution component is used to simultaneously detect multiple preset points on both sides of the symmetry axis of the arc surface of the hydraulic pump blade, and by comparing the measured value of the preset point with the standard value, it is judged whether the circular arc symmetry of the hydraulic pump blade meets the requirements or not.

[0009] Furthermore, the blade carrier includes a bearing seat fixedly arranged on the top of the base and a limiting groove opened on the top of the bearing seat, a plurality of magnet mounting grooves are evenly opened on the bottom of the limiting groove, and a magnet sheet is detachably arranged inside each magnet mounting groove, a push rod is slid through both sides of the interior of the bearing seat, a cross plate is fixedly arranged at the bottom ends of the two push rods, and a first spring is slidably sleeved on the outer wall of the push rod and located between the cross plate and the base.

[0010] Furthermore, the detection execution component includes support seats fixedly arranged on both sides of the top of the base, and lifting rods are slidably arranged inside the two support seats. The top ends of the lifting rods slide through the support seats and extend to the outside, and a support arm is fixedly arranged on the tops of the two lifting rods. A second spring is slidably sleeved on the outer wall of the lifting rod and located between the support seat and the support arm.

[0011] Furthermore, a plurality of mounting grooves are symmetrically provided on both sides of the bottom center position of the support arm, a scale rod assembly is provided inside the mounting groove, and a battery and a second conductive plate are fixedly provided on both sides of the inner wall of the mounting groove, respectively. An indicator light is fixedly provided on the outer wall of the support arm and at a position opposite to the mounting groove, the positive pole of the indicator light is electrically connected to the positive pole of the battery, and the negative pole of the indicator light is electrically connected to one of the terminal blocks of the second conductive plate, and a pressure plate is also fixedly provided on the side wall of the support arm.

[0012] Furthermore, the scale rod assembly includes a scale rod that slides through the mounting slot, a limit ring is fixedly sleeved on the outer wall of the scale rod and located above the support arm, a guide groove is also provided on the outer wall of the scale rod, a scale line groove is provided on the inner wall of the guide groove, a first conductive plate is slidingly sleeved on the outer wall of the scale rod, a limit slider slidingly arranged in the guide groove is fixedly provided on the inner wall of the first conductive plate, and the position of the first conductive plate and the scale rod is locked by a fastening bolt.

[0013] Furthermore, a No. 1 power terminal and a No. 2 power terminal are fixedly provided on both sides of the outer wall of the first conductive plate, and the size of the first conductive plate is adapted to the spatial size of the mounting slot between the battery and the second conductive plate. After the first conductive plate enters the space between the battery and the second conductive plate, the No. 1 power terminal is electrically connected to the negative pole of the indicator light, and the No. 2 power terminal is electrically connected to the other terminal of the second conductive plate.

[0014] Furthermore, the display component includes a vertical plate fixedly arranged on the top of the base, a projection board is fixedly arranged on the outer wall of the vertical plate close to the detection execution component, and a light shield is also fixedly arranged on the outer wall of the vertical plate and outside the projection board, and multiple marking points are symmetrically opened on both sides of the center position of the outer wall of the projection board, and the multiple marking points correspond one-to-one to the positions of multiple scale rod assemblies.

[0015] Furthermore, the detection result recording mechanism includes a mounting bracket fixedly arranged on the inner wall of the detection box cavity, a planar light source for emitting a parallel light beam is fixedly arranged at the bottom of the mounting bracket, and an industrial camera is fixedly arranged on the top of the planar light source, and a wedge-shaped driving block is fixedly arranged on the inner wall of the cavity of the detection box and below the planar light source through a bracket.

[0016] The present invention also discloses a method for detecting the circular arc symmetry of a hydraulic pump blade, which is used in a device for detecting the circular arc symmetry of a hydraulic pump blade. The method comprises the following steps: Step 1: First, start the servo motor to drive the rotating table to rotate intermittently according to the preset control program. Each time it rotates, a detection mechanism rotates to a position opposite to the detection result recording mechanism; Step 2: During the period of rotation of the rotary table, the hydraulic pump blade to be tested is loaded onto the testing mechanism stopped in front of the discharge window; Step 3: The detection mechanism loaded with the hydraulic pump blade to be detected is rotated to a position opposite to the detection result recording mechanism to detect the arc symmetry of the hydraulic pump blade.

[0017] The present invention provides a device and method for detecting the circular arc symmetry of hydraulic pump blades. Compared with the prior art, it has the following advantages: 1. A device and method for detecting the circular arc symmetry of hydraulic pump blades. By setting a blade carrier, the size of the limiting groove opened in the blade carrier can be designed according to the size of the current hydraulic pump blade, so that the hydraulic pump blade can not only be stably placed in the blade carrier, but also can be consistent with the mid-vertical line of the blade carrier, forming a benchmark for circular arc symmetry detection, which is convenient for subsequent detection. After the hydraulic pump blade detection is completed, the driving block can also push the push rod to achieve the effect of ejecting the tested hydraulic pump blade from the blade carrier, so as to facilitate the rapid removal of the hydraulic pump blade.

[0018] 2. A device and method for detecting the circular arc symmetry of a hydraulic pump blade. By setting a detection execution component, the bottom ends of multiple scale rod components interact with the curved surface of the hydraulic pump blade, so that the bottom ends and top ends of the multiple scale rod components can simultaneously imitate the contour shape of the curved surface of the hydraulic pump blade. The parallel light beams emitted by the plane light source can project the contour of the imitated scale rod component onto a projection board. By comparing whether the projection points of the top ends of the multiple scale rod components coincide with the arc contour mark points of the standard hydraulic pump blade at the preset position, if they coincide, the product is qualified, and if they do not coincide, the product is unqualified. The detection principle is simple and the detection process is efficient and fast. In addition, while using the projection method for detection, Since the positions of the first conductive plates in the multiple scale rod assemblies are set according to the arc surface contour trajectory of the standard hydraulic pump blades, and the standard-sized hydraulic pump blades are placed in the blade carrier for calibration detection before detection, the first conductive plates at multiple positions can just enter the installation grooves at the corresponding positions, so that the circuit where the indicator light is located is turned on, and this is used as the basis for detection. If all the indicator lights of the hydraulic pump blades to be tested subsequently can be lit during the detection process, it is a qualified product, otherwise it is an unqualified product. The two detection methods can verify each other, thereby greatly improving the accuracy of the output of the test results, eliminating the need for secondary verification of the test results, and saving the verification time of the test results.

[0019] 3. A device and method for detecting the circular arc symmetry of hydraulic pump blades. A rotating table is set up, and multiple blade carriers are set up on the rotating table. During the intermittent rotation of the rotating table driven by a servo motor, one of the blade carriers can be kept carrying a hydraulic pump blade for detection. At the same time, the material picking work can be carried out in the material picking window and the hydraulic pump blade to be tested can be placed on the empty blade carrier in the material discharging window. This allows the hydraulic pump blade detection, material picking and material discharging operations to be carried out continuously and synchronously, significantly improving the detection efficiency, which is conducive to the batch detection of hydraulic pump blades.

[0020] 4. A device and method for detecting the circular arc symmetry of hydraulic pump blades. By replacing blade carriers of different sizes and resetting the position of the marking point and the first conductive plate according to the arc contour of the hydraulic pump blade to be tested, the marking point, the position of the first conductive plate, the blade carrier and the hydraulic pump blade to be tested can all be adapted to each other, and can then be re-applied to the detection of the circular arc symmetry of hydraulic pump blades of new sizes, thereby greatly expanding the scope of application of the detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic structural diagram of the first state of the present invention without the protective door; Figure 3 This is a schematic diagram of the structure of the second state of the present invention without the protective door; Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure of part A; Figure 5 This is a schematic structural diagram of the assembled state of the rotating table, the detection mechanism, and the detection result recording mechanism of the present invention; Figure 6 Schematic diagram of the detection mechanism structure of the present invention; Figure 7 This is a schematic diagram of the blade carrier structure of the present invention; Figure 8 This is a schematic diagram of the structure of the first state of the detection execution component of the present invention; Figure 9 This is a schematic diagram of the structure of the second state of the detection execution component of the present invention; Figure 10 For the present invention Figure 9 A schematic diagram of the enlarged structure of part B in FIG; Figure 11 This is a schematic diagram of the decomposition state structure of the detection execution component of the present invention; Figure 12 For the present invention Figure 11 Schematic diagram of the enlarged structure of part C; Figure 13 This is a schematic diagram showing the structure of the components of the present invention; Figure 14 This is a schematic diagram of the detection structure recording mechanism of the present invention.

[0022] In the figure: 1. Detection box; 2. Material discharge window; 3. Material removal window; 4. Protective door; 5. Rotating table; 6. Detection mechanism; 61. Base; 62. Blade carrier; 621. Support seat; 622. Limiting groove; 623. Magnet; 624. Ejector rod; 625. Horizontal plate; 626. First spring; 63. Detection execution assembly; 631. Support arm; 632. Support seat; 633. Lifting rod; 634. Second spring; 635. Mounting slot; 636. Scale rod assembly; 636 1. Scale rod; 6362. Limiting ring; 6363. Guide groove; 6364. Scale line groove; 6365. First conductive plate; 637. Pressure plate; 638. Battery; 639. Second conductive plate; 6310. Indicator light; 64. Display assembly; 641. Vertical plate; 642. Projection board; 643. Light shield; 644. Marking point; 7. Test result recording mechanism; 71. Mounting bracket; 72. Plane light source; 73. Industrial camera; 74. Wedge-shaped drive block; 8. Arc-shaped protrusion. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The present invention provides three technical solutions: a device for detecting the circular arc symmetry of hydraulic pump blades, specifically including the following embodiments: like Figure 1-Figure 5 The first embodiment is shown: a device for detecting the circular arc symmetry of hydraulic pump blades, comprising a detection box 1 and a discharge window 2 and a take-out window 3 respectively provided on the front and back of the detection box 1, wherein the discharge window 2 and the take-out window 3 are each provided with a protective door 4 which is rotatable by a hinge, and further comprising: The rotating platform 5 is rotatably arranged inside the detection box 1 and driven by a servo motor to carry the hydraulic pump blades to be tested. The servo motor is fixedly arranged at the bottom of the inner cavity of the detection box 1, and the output shaft of the servo motor is connected to the bottom of the rotating platform 5; Multiple detection mechanisms 6 are evenly arranged on the top of the rotating platform 5, and are used to simultaneously detect the arc symmetry of the hydraulic pump blades using two detection methods. The results of the two detection methods are mutually verified to determine the accuracy of the detection results. An arc-shaped protrusion 8 for driving the detection mechanism 6 to separate from the hydraulic pump blades is also fixed on one side of the top of the inner cavity of the detection box 1; The detection result recording mechanism 7 is arranged on the inner cavity side wall of the detection box 1, and is used to drive the detection mechanism 6 to perform the arc symmetry detection operation of the pressure pump blade, record the detection results, and transmit the detection results to the terminal device for analysis.

[0025] like Figure 6-Figure 13 A second embodiment is shown, which differs from the first embodiment in that the detection mechanism 6 includes a base 61 detachably arranged on the top of the rotating table 5, and a blade carrier 62, a detection execution component 63 and a display component 64 are respectively arranged on the top of the base 61. The blade carrier 62 is used to position the hydraulic pump blade to be detected to determine the posture of the hydraulic pump blade during detection. The detection execution component 63 is used to simultaneously detect multiple preset points on both sides of the symmetry axis of the arc surface of the hydraulic pump blade, and by comparing the measured value of the preset point with the standard value, it is judged whether the circular arc symmetry of the hydraulic pump blade meets the requirements or not.

[0026] In this embodiment, the blade carrier 62 includes a supporting seat 621 fixedly arranged on the top of the base 61 and a limiting groove 622 opened on the top of the supporting seat 621. A plurality of magnet mounting grooves are evenly opened at the bottom of the limiting groove 622. A magnet piece 623 is detachably provided inside each magnet mounting groove. A push rod 624 is slidably passed through both sides of the interior of the supporting seat 621. A horizontal plate 625 is fixedly provided at the bottom ends of the two push rods 624. A first spring 626 is slidably sleeved on the outer wall of the push rod 624 and located between the horizontal plate 625 and the base 61.

[0027] In this embodiment, the detection execution component 63 includes support seats 632 fixedly arranged on both sides of the top of the base 61, and the interiors of the two support seats 632 are slidably provided with lifting rods 633. The top ends of the lifting rods 633 slide through the support seats 632 and extend to the outside, and the tops of the two lifting rods 633 are jointly fixed with support arms 631. A second spring 634 is slidably sleeved on the outer wall of the lifting rod 633 and located between the support seat 632 and the support arm 631.

[0028] In this embodiment, a plurality of mounting grooves 635 are symmetrically provided on both sides of the bottom center position of the support arm 631, a scale rod assembly 636 is provided inside the mounting groove 635, and a battery 638 and a second conductive plate 639 are fixedly provided on both sides of the inner wall of the mounting groove 635, and an indicator light 6310 is fixedly provided on the outer wall of the support arm 631 and at a position opposite to the mounting groove 635. The positive pole of the indicator light 6310 is electrically connected to the positive pole of the battery 638, and the negative pole of the indicator light 6310 is electrically connected to one of the terminal blocks of the second conductive plate 639. A pressure plate 637 is also fixedly provided on the side wall of the support arm 631.

[0029] In this embodiment, the scale rod assembly 636 includes a scale rod 6361 that slides through the mounting slot 635, and a limit ring 6362 is fixedly provided on the outer wall of the scale rod 6361 and above the support arm 631. A guide groove 6363 is also provided on the outer wall of the scale rod 6361, and a scale line groove 6364 is provided on the inner wall of the guide groove 6363. A first conductive plate 6365 is slidably provided on the outer wall of the scale rod 6361, and a limit slider slidably provided in the guide groove 6363 is fixedly provided on the inner wall of the first conductive plate 6365, and the position of the first conductive plate 6365 and the scale rod 6361 is locked by tightening bolts.

[0030] In this embodiment, a No. 1 power terminal and a No. 2 power terminal are fixedly provided on both sides of the outer wall of the first conductive plate 6365, and the size of the first conductive plate 6365 is adapted to the spatial size of the mounting slot 635 between the battery 638 and the second conductive plate 639. After the first conductive plate 6365 enters the space between the battery 638 and the second conductive plate 639, the No. 1 power terminal is electrically connected to the negative pole of the indicator light 6310, and the No. 2 power terminal is electrically connected to the other terminal of the second conductive plate 639.

[0031] In this embodiment, the display component 64 includes a vertical plate 641 fixedly set on the top of the base 61, and a projection plate 642 is fixedly set on the outer wall of the vertical plate 641 close to the detection execution component 63, and a light shield 643 is also fixedly set on the outer wall of the vertical plate 641 and outside the projection plate 642. A plurality of marking points 644 are symmetrically opened on both sides of the center position of the outer wall of the projection plate 642, and the plurality of marking points 644 correspond one by one to the positions of the plurality of scale rod components 636. Multiple first conductive plates 6365 and multiple marking points 644 are distributed along the arc contour trajectory of a standard hydraulic pump blade. When testing a qualified hydraulic pump blade, the projected top of the scale rod assembly 636 at different positions will just reach the marking point 644 at the corresponding position. The first conductive plates 6365 in the two scale rod assemblies 636 located at symmetrical positions on the left and right sides of the support arm 631 are at the same height. The position setting requirements of the first conductive plates 6365 in the multiple scale rod assemblies 636 participating in the current hydraulic pump blade arc symmetry detection are as follows: the first conductive plates 6365 at different positions just enter the installation slots 635 at the corresponding positions, and form a closed circuit with the battery 638, the second conductive plate 639 and the indicator light 6310, and the indicator light 6310 will be lit. The position of the first conductive plate 6365 can be precisely adjusted through the scale line slot 6364.

[0032] like Figure 14 A third embodiment is shown, which differs from the second embodiment in that the detection result recording mechanism 7 includes a mounting bracket 71 fixedly arranged on the inner wall of the cavity of the detection box 1, a plane light source 72 for emitting a parallel light beam is fixedly arranged at the bottom of the mounting bracket 71, and an industrial camera 73 is fixedly arranged on the top of the plane light source 72, and a wedge-shaped driving block 74 is fixedly arranged on the inner wall of the cavity of the detection box 1 and below the plane light source 72 through a bracket.

[0033] An embodiment of the present invention further provides a method for detecting the circular arc symmetry of a hydraulic pump blade, which is used in a device for detecting the circular arc symmetry of a hydraulic pump blade. The method comprises the following steps: Step 1: First, start the servo motor to drive the rotating table 5 to rotate intermittently according to the preset control program. Each time it rotates, a detection mechanism 6 rotates to a position opposite to the detection result recording mechanism 7; Step 2: During the period of rotation of the rotary table 5, the hydraulic pump blade to be tested is loaded onto the testing mechanism 6 that stops in front of the discharge window 2; Step 3: The detection mechanism 6 loaded with the hydraulic pump blade to be detected is rotated to a position opposite to the detection result recording mechanism 7 to detect the arc symmetry of the hydraulic pump blade.

[0034] When in use, first place the pressure pump blade to be tested inside the limiting groove 622. Since the size of the limiting groove 622 is designed according to the size of the pressure pump blade to be tested, the pressure pump blade can fit perfectly when placed in the limiting groove 622, and at this time the symmetry axis of the pressure pump blade coincides with the symmetry axis of the limiting groove 622. The magnet pieces 623 distributed at multiple positions use magnetic force to stably adsorb the hydraulic pump blade in the limiting groove 622.

[0035] After the servo motor's intermittent time ends, it drives the rotating table 5 to rotate again. When the detection mechanism 6 loaded with the pressure pump blade approaches the detection result recording mechanism 7, the top of the pressure plate 637 first contacts the wedge surface of the wedge drive block 74, and the pressure plate 637 slides along the wedge surface and moves downward at a uniform speed due to the downward pressure of the wedge surface. The support arm 631 and the pressure plate 637 move downward synchronously until the pressure plate 637 slides to the lowest point of the wedge surface. At this time, the bottom end of the part of the scale rod assembly 636 located just above the hydraulic pump blade and the hydraulic pump blade are in contact with each other. The arc surfaces offset each other, and the scale rod assemblies 636 at different positions are lifted up by the arc surface of the hydraulic pump blade, so that the arc profile formed by the curve fitting of the top end points of the multiple scale rod assemblies 636 is the same as the arc surface profile of the hydraulic pump blade to be tested. If the hydraulic pump blade to be tested is qualified, the first conductive plate 6365 in each scale rod assembly 636 just fits into the installation groove 635, and the first and second power terminals on both sides of the outer wall of the first conductive plate 6365 are connected to the negative electrode of the lithium battery and the second conductive plate 639 respectively. 63. The other terminal is electrically connected to the other terminal, and the indicator lights 6310 at the corresponding positions are all lit. Therefore, the industrial camera 73 captures the image of the lighting of the indicator lights 6310 and transmits it to the terminal device. The staff can judge whether the roundness and symmetry of the hydraulic pump blades are qualified by observing whether the indicator lights 6310 are all lit. Another qualified judgment standard for the hydraulic pump blades is that the parallel light beams emitted by the plane light source 72 are projected onto the surfaces of the multiple scale rod assemblies 636 directly opposite it. The projections of the scale rod assemblies 636 form the same shadow outline on the projection plate 642. Then, the tops of the shadows of the multiple scale rod assemblies 636 symmetrically arranged relative to the perpendicular line of the support arm 631 just coincide with the marking points 644 at the corresponding positions. Since the multiple marking points 644 are arranged according to the arc contour trajectory of the standard hydraulic pump blade, the marking points 644 on the left and right sides are symmetrically arranged. The industrial camera 73 captures the position of the projection tops of the multiple scale rod assemblies 636 relative to the marking points 644 at the corresponding positions on the projection plate 642 in real time, and transmits the image information to the terminal device for analysis.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the circular arc symmetry of hydraulic pump blades, comprising a detection box (1) and a discharge window (2) and a take-out window (3) respectively provided on the front and back sides of the detection box (1), wherein a protective door (4) is provided in each of the discharge window (2) and the take-out window (3) by rotating a hinge, and characterized in that: Also includes: A rotating table (5) is rotatably arranged inside the detection box (1) and driven to rotate by a servo motor, and is used to carry the hydraulic pump blades to be detected; A plurality of detection mechanisms (6) are evenly arranged on the top of the rotating table (5) and are used to simultaneously detect the arc symmetry of the hydraulic pump blades using two detection methods. The detection results of the two detection methods are mutually verified to determine the accuracy of the detection results. An arc-shaped protrusion (8) for driving the detection mechanism (6) to separate from the hydraulic pump blades is also fixedly provided on one side of the top of the inner cavity of the detection box (1); The detection result recording mechanism (7) is arranged on the inner cavity side wall of the detection box (1) and is used to drive the detection mechanism (6) to perform the arc symmetry detection operation of the pressure pump blade, record the detection result, and transmit the detection result to the terminal device for analysis.

2. The device for detecting circular arc symmetry of hydraulic pump blades according to claim 1, characterized in that: The detection mechanism (6) includes a base (61) detachably arranged on the top of the rotating table (5), and a blade carrier (62), a detection execution component (63) and a display component (64) are respectively arranged on the top of the base (61). The blade carrier (62) is used to position the hydraulic pump blade to be detected to determine the posture of the hydraulic pump blade during detection. The detection execution component (63) is used to simultaneously detect multiple preset points on both sides of the symmetry axis of the arc surface of the hydraulic pump blade, and by comparing the measured value of the preset point with the standard value, it is judged whether the circular arc symmetry of the hydraulic pump blade meets the requirement or not.

3. The device for detecting circular arc symmetry of hydraulic pump blades according to claim 2, characterized in that: The blade carrier (62) includes a bearing seat (621) fixedly arranged on the top of the base (61) and a limiting groove (622) opened on the top of the bearing seat (621), a plurality of magnet mounting grooves are evenly opened at the bottom of the limiting groove (622), and a magnet sheet (623) is detachably arranged inside each magnet mounting groove. A top rod (624) is slidably passed through both sides of the interior of the bearing seat (621), and a horizontal plate (625) is fixedly arranged at the bottom ends of the two top rods (624). A first spring (626) is slidably sleeved on the outer wall of the top rod (624) and located between the horizontal plate (625) and the base (61).

4. The device for detecting circular arc symmetry of hydraulic pump blades according to claim 2, characterized in that: The detection execution component (63) includes support bases (632) fixedly arranged on both sides of the top of the base (61), and lifting rods (633) are slidably arranged inside the two support bases (632). The top ends of the lifting rods (633) slide through the support bases (632) and extend to the outside, and a support arm (631) is fixedly arranged on the tops of the two lifting rods (633). A second spring (634) is slidably sleeved on the outer wall of the lifting rod (633) and located between the support base (632) and the support arm (631).

5. The device for detecting circular arc symmetry of hydraulic pump blades according to claim 4, characterized in that: A plurality of mounting grooves (635) are symmetrically provided on both sides of the center position of the bottom of the support arm (631), a scale rod assembly (636) is provided inside the mounting groove (635), and a battery (638) and a second conductive plate (639) are fixedly provided on both sides of the inner wall of the mounting groove (635), an indicator light (6310) is fixedly provided on the outer wall of the support arm (631) and at a position opposite to the mounting groove (635), the positive pole of the indicator light (6310) is electrically connected to the positive pole of the battery (638), and the negative pole of the indicator light (6310) is electrically connected to one of the connection terminals of the second conductive plate (639), and a pressure plate (637) is also fixedly provided on the side wall of the support arm (631).

6. The device for detecting circular arc symmetry of hydraulic pump blades according to claim 5, characterized in that: The scale rod assembly (636) includes a scale rod (6361) that slides through the mounting groove (635), a limit ring (6362) is fixedly provided on the outer wall of the scale rod (6361) and located above the support arm (631), a guide groove (6363) is also provided on the outer wall of the scale rod (6361), a scale line groove (6364) is provided on the inner wall of the guide groove (6363), a first conductive plate (6365) is slidably provided on the outer wall of the scale rod (6361), a limit slider slidably provided in the guide groove (6363) is also fixedly provided on the inner wall of the first conductive plate (6365), and the position between the first conductive plate (6365) and the scale rod (6361) is locked by fastening bolts.

7. The device for detecting circular arc symmetry of hydraulic pump blades according to claim 6, characterized in that: A first power terminal and a second power terminal are fixedly provided on both sides of the outer wall of the first conductive plate (6365), and the size of the first conductive plate (6365) is adapted to the size of the space between the battery (638) and the second conductive plate (639) where the mounting slot (635) is located. After the first conductive plate (6365) enters the space between the battery (638) and the second conductive plate (639), the first power terminal is electrically connected to the negative pole of the indicator light (6310), and the second power terminal is electrically connected to the other terminal of the second conductive plate (639).

8. The device for detecting circular arc symmetry of hydraulic pump blades according to claim 5, characterized in that: The display assembly (64) includes a vertical plate (641) fixedly arranged on the top of the base (61), a projection plate (642) fixedly arranged on the outer wall of the vertical plate (641) close to the detection execution assembly (63), and a light shield (643) fixedly arranged on the outer wall of the vertical plate (641) and outside the projection plate (642), and a plurality of marking points (644) are symmetrically opened on both sides of the center position of the outer wall of the projection plate (642), and the plurality of marking points (644) respectively correspond to the positions of the plurality of scale rod assemblies (636).

9. The device for detecting circular arc symmetry of hydraulic pump blades according to claim 1, characterized in that: The detection result recording mechanism (7) comprises a mounting frame (71) fixedly arranged on the inner wall of the cavity of the detection box (1); a plane light source (72) for emitting a parallel light beam is fixedly arranged at the bottom of the mounting frame (71); an industrial camera (73) is fixedly arranged on the top of the plane light source (72); and a wedge-shaped driving block (74) is fixedly arranged on the inner wall of the cavity of the detection box (1) and below the plane light source (72) via a bracket.

10. A method for detecting the circular arc symmetry of hydraulic pump blades, characterized by: The method for detecting circular arc symmetry of hydraulic pump blades according to any one of claims 1 to 9 comprises the following steps: Step 1: First, start the servo motor to drive the rotating table (5) to rotate intermittently according to a preset control program. Each time it rotates, a detection mechanism (6) rotates to a position opposite to the detection result recording mechanism (7); Step 2: During the period of rotation of the rotary table (5), the hydraulic pump blade to be tested is loaded onto the testing mechanism (6) that stops in front of the discharge window (2); Step 3: The detection mechanism (6) loaded with the hydraulic pump blade to be detected is rotated to a position opposite to the detection result recording mechanism (7) to detect the arc symmetry of the hydraulic pump blade.

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