A methanol engine crankshaft wear test device and method

Abstract

The present invention belongs to the technical field of crankshaft detection, and in particular, relates to a methanol engine crankshaft wear test device and method, comprising a semicircular support ring and a support cross bar; two semicircular support rings are symmetrically arranged up and down, and the outer ring side surface of each semicircular support ring is horizontally connected to the support cross bar, and the upper and lower symmetrical support cross bars are connected by an upper and lower adjustment mechanism; an annular cavity is provided inside the two semicircular support rings, and a limited position cavity is provided on the outer cavity wall of the annular cavity, and semicircular friction rings are installed in the two annular cavities; a driving friction mechanism is provided on the semicircular support ring, which is used to drive the two semicircular friction rings connected to each other to rotate; arc-shaped sliders are detachably installed on the right sides of the two semicircular friction rings through rolling disassembly components, and a detection component is installed on the arc-shaped slider; the present invention can prevent the arc-shaped slider from jumping or shaking during circular rotation, thereby affecting the dimensional accuracy of the detection component in measuring the journal wear.

Description

Technical Field

[0001] The invention belongs to the technical field of crankshaft detection, and in particular relates to a crankshaft wear test device and method for a methanol engine. Background Art

[0002] The crankshaft is one of the core components of an internal combustion engine. Its main function is to convert the reciprocating motion of the piston into rotational motion, thereby driving the propulsion system of the ship or other mechanical devices. The crankshaft needs to withstand huge alternating loads and must have good strength, toughness and wear resistance.

[0003] The equipment for friction testing of methanol engine crankshafts is either that the inspectors use handheld calipers, micrometers and other precision measuring tools to measure the diameter of the main journal or connecting rod journal, and compare it with the original specifications to determine whether there is excessive wear; or use non-contact optical measuring equipment for high-precision measurement; and no matter which test equipment or measuring instrument is used, the measuring instrument or measuring equipment needs to be symmetrically set on the outer ring of the crankshaft journal or connecting rod journal, and then rotate synchronously around the journal to achieve high-precision measurement of the journal size.

[0004] However, most of the existing testing devices are arranged around the outside of the journal by two semicircular gears that fit together, and then the gears are engaged with the toothed disc to drive the detection mechanism to rotate around the journal for single-point contact measurement. Obviously, if there is a gap between the two semicircular gears or the gears jump in this way, it will inevitably affect the precision and accuracy of the journal test by the detection mechanism, and will inevitably affect the accuracy of the methanol engine crankshaft wear test, thereby affecting the subsequent safe use of the methanol engine crankshaft. Summary of the invention

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a methanol engine crankshaft wear test device, comprising a semicircular support ring and a support cross bar;

[0007] The two semicircular support rings are symmetrically arranged up and down, and the outer ring side of each semicircular support ring is horizontally connected with a support cross bar, and the vertically symmetrical support cross bars are connected by an up and down adjustment mechanism;

[0008] An annular cavity is provided inside the two semicircular support rings, and a limited cavity is provided on the outer cavity wall of the annular cavity, and a semicircular friction ring is installed in the two annular cavities;

[0009] The semicircular support ring is provided with a driving friction mechanism for driving the two semicircular friction rings connected to each other to rotate;

[0010] The right sides of the two semicircular friction rings are detachably mounted with arc-shaped sliding blocks through rolling disassembly components, and the arc-shaped sliding blocks are mounted with detection components.

[0011] Furthermore, the driving friction mechanism includes a friction roller, a limiting roller, a lifting roller and a rotating shaft. The radial width of the annular cavity is greater than the radial width of the limiting cavity. The radial width of the semicircular friction ring is less than the radial width of the annular cavity, but greater than the radial width of the limiting cavity. The inner ring wall of the semicircular friction ring is in contact with the inner diameter wall of the annular cavity. The upper and lower symmetrical friction rollers are respectively rotatably installed in the upper and lower annular cavities through two rotating shafts, and the friction rollers are in friction contact with the outer ring surface of the semicircular friction ring. The rotating shaft of the friction roller is fixed to the back of the semicircular support ring. The output shaft of the servo motor is connected, and at least two limiting rollers are rotatably installed in the annular cavity inside the semicircular support ring located above through the rotating shaft, and the limiting rollers are symmetrically arranged on both sides of the friction roller, and they are in rolling contact with the outer ring surface of the semicircular friction ring. At least two lifting rollers are also rotatably installed in the annular cavity inside the semicircular support ring located below through the rotating shaft, and the lifting rollers are also symmetrically arranged on both sides of the friction roller below, and they are also in rolling contact with the outer ring surface of the semicircular friction ring. The friction roller, the limiting roller and the lifting roller have the same center as the connected semicircular friction ring.

[0012] Furthermore, the rolling disassembly assembly includes a threaded support rod, a contact roller, a wear-resistant ring, a support block and a locking nut. The threaded support rod with a threaded structure is fixed to the outer side surface of the semicircular friction ring, and the rod body of the threaded support rod passes through the limiting cavity and is located on the right side surface of the semicircular support ring. A contact roller is rotatably sleeved on the threaded support rod, and the contact roller contacts the cavity wall of the limiting cavity. A wear-resistant ring is provided on the outer end surface of the contact roller, and the inner side surface of the wear-resistant ring contacts the right side surface of the semicircular support ring, and its outer side surface contacts the support block sleeved on the threaded support rod. An arc-shaped slider is installed on the inner side surface of the bottom end portion of the support block, and the arc surface of the arc-shaped slider contacts the inner ring surface of the semicircular support ring. The support block is fixed to the threaded support rod by the cooperation of a locking nut and a washer.

[0013] Furthermore, the rolling disassembly assembly also includes a spring member and an arc plate. A plurality of spring members are installed in a circular array on the wall of the support hole of the support block, and the end of each spring member is connected to an arc plate. The plurality of arc plates in the circular array are formed into a circular ring in the support hole and are sleeved on the threaded support rod, and the inner ends of the plurality of arc plates are arranged with arc chamfered surfaces.

[0014] Furthermore, T-shaped blind grooves are provided on the back sides of both ends of the semicircular friction ring, and the upper and lower symmetrical T-shaped blind grooves are aligned with each other to form an I-shaped blind groove; a T-shaped slot aligned with the T-shaped blind groove is provided on the back side of the semicircular support ring, and the upper and lower T-shaped slots are aligned with each other to form an I-shaped slot; the back ends of the two semicircular support rings are both provided with insertion connection components, and the two groups of insertion connection components respectively slide through the two I-shaped slots and are inserted into the two I-shaped blind grooves.

[0015] Furthermore, the insertion connection assembly includes an I-shaped plug block, a metal sheet, a supporting long rod, a support plate, an electric push rod and an electromagnetic block. The I-shaped plug block made of silicone material slides through the I-shaped slot and is sealed and inserted into the I-shaped blind slot, and a metal sheet is installed on the outer side of the I-shaped plug block. At least two supporting long rods are fixed to the back of one end of the semicircular support ring, and the two supporting long rods are located on both sides of the T-shaped slot. The distance from the support plate to the back of the semicircular support ring is greater than the thickness of the I-shaped plug block, and support plates are installed on the ends of both. An electric push rod is fixed on the support plate, and an electromagnetic block is insulated and installed on the end face of the piston rod of the electric push rod, and the electromagnetic block is magnetically adsorbed and connected to the metal sheet.

[0016] Furthermore, the up and down adjustment mechanism includes a double-rotation screw, a screw sleeve, a mounting block, a mounting back plate, an intermediate support block and a guide rail slide. The upper and lower symmetrical support cross bars are connected to the vertically arranged double-rotation screw through two screw sleeves, and the two ends of the double-rotation screw are rotatably mounted with mounting blocks. The two mounting blocks are connected to each other through the mounting back plate, and a servo motor connected to the double-rotation screw is fixed on one of the mounting blocks, an intermediate support block is fixed on the middle part of the mounting back plate, and a double-rotation screw is rotatably supported on the intermediate support block, and a guide rail groove is opened at the end of the mounting block, and the guide rail groove is slidably matched with the guide rail slide vertically fixed to the front side of the mounting back plate.

[0017] A methanol engine crankshaft wear test method, which is applicable to the above-mentioned methanol engine crankshaft wear test device, and the test method comprises the following steps:

[0018] S1: The crankshaft to be tested is hoisted onto the bracket by hoisting equipment for support and fixation;

[0019] S2: Push the two semicircular support rings separated from each other to the journal of the crankshaft to be measured through the pushing device on the bottom surface, and then install the detection assembly on the arc-shaped slider;

[0020] S3: Install the arc-shaped slider onto the corresponding semicircular friction ring through the rolling disassembly assembly, and the upper and lower adjustment mechanisms will drive the upper and lower semicircular support rings to completely close together;

[0021] S4: The drive insert connection assembly works to connect the two semicircular friction rings to form a complete friction ring. The driving friction mechanism drives the complete friction ring to rotate in the annular cavity, and the detection assembly detects the wear of the journal.

[0022] The present invention has the following beneficial effects:

[0023] 1. The present invention installs symmetrical detection components on two semicircular friction rings, and then drives the friction mechanism to drive the connected complete friction rings to rotate in an annular cavity through the mutual cooperation of multiple rollers, and then drives the symmetrical micrometer screw and the anvil to rotate synchronously around the outer ring surface of the shaft neck to be measured, so as to achieve accurate and rapid measurement of the wear data of the shaft neck to be measured. The micrometer screw and the anvil rotate on the gear ring ring separately through two independent driving mechanisms, which will not only cause the measurement data to have errors due to vibration, but also the two independent driving mechanisms are difficult to ensure accurate and synchronous rotation, thereby affecting the wear test of the shaft neck to be measured by a similar digital micrometer, thereby improving the accuracy and test efficiency of the test device of the present invention for the wear test of the crankshaft of the methanol engine.

[0024] 2. According to the present invention, the insertion connection component is inserted into the connected I-shaped blind groove through the mutual cooperation of the I-shaped blind groove and the I-shaped plug block, so that the upper and lower semicircular friction rings are connected to form a completed friction ring. At this time, the contact ends of the two semicircular friction rings are precisely fitted together, and then the rotation of the friction roller will drive the completely connected friction ring to rotate accurately and slowly in the annular cavity. Not only will the two completely connected semicircular friction rings not be disconnected during normal rotation, but also the two ends of the two semicircular friction rings will not be precisely fitted, which will cause the completed friction ring to shake slightly when the friction roller is in friction contact with the gap at the two ends, thereby affecting the dimensional accuracy of the detection component in measuring the journal wear.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure disclosed in the present invention;

[0028] Figure 2 A diagram showing the connection state of two semicircular support rings disclosed in the present invention;

[0029] Figure 3 It is a schematic diagram of the internal structure of two semicircular support rings disclosed in the present invention;

[0030] Figure 4 A back structure diagram of two semicircular support rings connected to each other disclosed in the present invention;

[0031] Figure 5 It is a structural schematic diagram of the rolling disassembly assembly disclosed in the present invention;

[0032] Figure 6 It is a structural schematic diagram of the insertion connection assembly disclosed in the present invention;

[0033] Figure 7 It is a structural schematic diagram of the up and down adjustment mechanism disclosed in the present invention;

[0034] Figure 8 The present invention is a flow chart of the testing method disclosed in the present invention.

[0035] In the figure: 1. Support crossbar;

[0036] 2. Semicircular support ring; 21. Annular cavity; 22. Limit cavity; 23. I-shaped slot;

[0037] 3. Semicircular friction ring; 31. I-shaped blind groove;

[0038] 4. Driving friction mechanism; 41. Friction roller; 42. Limiting roller; 43. Lifting roller; 44. Rotating shaft;

[0039] 5. Rolling disassembly assembly; 51. Threaded support rod; 52. Contact roller; 53. Wear-resistant ring; 54. Support block; 541. Support hole; 55. Locking nut; 56. Arc-shaped slider; 57. Detection assembly; 58. Spring member; 59. Arc-shaped plate;

[0040] 6. Insert the connecting assembly; 61. I-shaped plug block; 62. Metal sheet; 63. Support long rod; 64. Support plate; 65. Electric push rod; 66. Electromagnetic block;

[0041] 7. Up and down adjustment mechanism; 71. Double-rotation screw; 72. Screw sleeve; 73. Mounting block; 74. Mounting back plate; 75. Intermediate support block; 76. Guide rail slide. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] See also Figure 1-Figure 7 As shown, the present invention is a methanol engine crankshaft wear test device, comprising a semicircular support ring 2 and a support cross bar 1;

[0045] The two semicircular support rings 2 are symmetrically arranged up and down, and the outer ring side of each semicircular support ring 2 is horizontally connected with a support cross bar 1, and the vertically symmetrical support cross bars 1 are connected by an up and down adjustment mechanism 7;

[0046] An annular cavity 21 is provided inside the two semicircular support rings 2, and a limiting cavity 22 is provided on the outer cavity wall of the annular cavity 21. Semicircular friction rings 3 are installed in the two annular cavities 21.

[0047] The semicircular support ring 2 is provided with a driving friction mechanism 4 for driving the two semicircular friction rings 3 connected to each other to rotate;

[0048] The right sides of the two semicircular friction rings 3 are detachably mounted with arc-shaped sliders 56 through rolling disassembly components 5, and a detection component 57 is mounted on the arc-shaped sliders 56;

[0049] Specifically, the present invention installs rotatable semicircular friction rings 3 in the annular cavities 21 of the two semicircular support rings 2 respectively. When the upper and lower adjustment mechanisms 7 drive the upper and lower symmetrical semicircular support rings 2 to fit each other around the journal of the crankshaft of the methanol engine to be tested supported by the bracket through the support crossbar 1, the two semicircular friction rings 3 in the annular cavity 21 will be connected to each other to form a complete friction ring. If the detection component 57 adopts a structure similar to a digital micrometer, the micrometer screw and other structures can be installed on the arc-shaped slider 56 corresponding to the rolling disassembly component 5 extending from the outer side of the upper semicircular friction ring 3, and the measuring anvil and other structures can be installed. Install it on the arc-shaped slider 56 corresponding to the rolling disassembly component 5 extending from the outer side of the lower semicircular friction ring 3, so that the micrometer screw and the anvil are symmetrically fitted to the shaft neck to be measured. If the detection component 57 adopts the laser measurement method, the laser emitting module can be installed on the arc-shaped slider 56 corresponding to the upper semicircular friction ring 3, and the laser receiving module can be installed on the arc-shaped slider 56 corresponding to the lower semicircular friction ring 3. Then, driving the friction mechanism 4 will drive the connected complete friction ring to rotate in an annular cavity 21, and then drive the symmetrical micrometer screw and the anvil to rotate synchronously around the outer ring surface of the shaft neck to be measured, so as to achieve The diameter of the journal to be measured is measured and compared with the original specification to determine whether there is excessive wear, so as to facilitate accurate and rapid measurement of the wear data of the journal of the crankshaft to be measured. The micrometer screw and the measuring anvil rotate on the gear ring through two independent driving mechanisms alone, which will not only cause the measurement data to have errors due to the vibration, but also the two independent driving mechanisms are difficult to ensure accurate synchronous rotation, thus affecting the wear test of the journal to be measured by a similar digital micrometer. Since the rolling disassembly component 5 is partially arranged in a rolling manner in the limit cavity 22, the annular rotating arc slider 56 can be used. It plays a limiting role to prevent the arc-shaped slider 56 from jumping or shaking when it rotates in a ring, thereby improving the accuracy and test efficiency of the test device of the present invention for the methanol engine crankshaft wear test; and when the journal measurement is completed, the driving friction mechanism 4 drives the two connected semicircular friction rings 3 to enter the annular cavity 21 of the two semicircular support rings 2 respectively, and then disconnect, and the upper and lower adjustment mechanisms 7 drive the two semicircular support rings 2 to slide away synchronously, so as to facilitate the separation of the test device from the measured journal, and then drive the test device to slide to the next journal position to be tested through the sliding device for wear testing.

[0050] In this embodiment, the driving friction mechanism 4 includes a friction roller 41, a limiting roller 42, a lifting roller 43 and a rotating shaft 44. The radial width of the annular cavity 21 is greater than the radial width of the limiting cavity 22. The radial width of the semicircular friction ring 3 is less than the radial width of the annular cavity 21, but greater than the radial width of the limiting cavity 22. The inner ring wall of the semicircular friction ring 3 is in contact with the inner diameter wall of the annular cavity 21. The upper and lower symmetrical friction rollers 41 are respectively rotatably installed in the upper and lower annular cavities 21 through two rotating shafts 44, and the friction rollers 41 are in friction contact with the outer ring surface of the semicircular friction ring 3. The rotating shaft 44 of the friction roller 41 is fixed to the back of the semicircular support ring 2. The output shaft of a servo motor is connected to the semicircular support ring 2. At least two limiting rollers 42 are rotatably installed in the annular cavity 21 inside the upper semicircular support ring 2 through a rotating shaft 44, and the limiting rollers 42 are symmetrically arranged on both sides of the friction roller 41, and they are in rolling contact with the outer ring surface of the semicircular friction ring 3. At least two lifting rollers 43 are also rotatably installed in the annular cavity 21 inside the semicircular support ring 2 located below through a rotating shaft 44, and the lifting rollers 43 are also symmetrically arranged on both sides of the friction roller 41 below, and they are also in rolling contact with the outer ring surface of the semicircular friction ring 3. The friction roller 41, the limiting roller 42 and the lifting roller 43 have the same center as the connected semicircular friction ring 3;

[0051] Specifically, the contact between the upper and lower symmetrical friction rollers 41 and the semicircular friction ring 3 can drive the connected friction ring to rotate stably in the annular cavity 21, and the multiple limiting rollers 42 located in the upper annular cavity 21 can limit the friction ring that is continuously and slowly rotating to prevent the friction ring from jumping upward in the annular cavity 21, and the multiple lifting rollers 43 in the lower annular cavity 21 can lift and support the complete friction ring to prevent the slowly rotating friction ring from falling and jumping, thereby preventing the complete friction ring from jumping up and down when it rotates slowly in the annular cavity 21, and the cavity width of the annular cavity 21 is greater than the cavity width of the limiting cavity 22, so that The complete friction ring will not slip in the axial direction when rotating, thereby improving the accuracy of the detection component 57 installed symmetrically above and below for measuring the wear of the shaft neck to be tested. Since the diameter of the friction roller 41 is much smaller than the diameter of the complete friction ring, the rotation of the friction roller 41 will only drive the complete friction ring to rotate slowly and steadily in the annular cavity 21, thereby further improving the accuracy of the detection component 57 for measuring the wear of the shaft neck to be tested. At least six rollers in the annular cavity 21 are concentric with the connected complete friction ring, so that the two semicircular friction rings 3 will not be misaligned or skewed no matter which annular cavity 21 they are rotated into.

[0052] In this embodiment, the rolling disassembly assembly 5 includes a threaded support rod 51, a contact roller 52, a wear-resistant ring 53, a support block 54 and a locking nut 55. The threaded support rod 51 with a threaded structure is fixed to the outer side surface of the semicircular friction ring 3, and the rod body of the threaded support rod 51 passes through the limiting cavity 22 and is located on the right side surface of the semicircular support ring 2. The contact roller 52 is rotatably sleeved on the threaded support rod 51, and the contact roller 52 contacts the cavity wall of the limiting cavity 22. The outer end surface of the contact roller 52 is provided with a wear-resistant ring 53, and the inner side surface of the wear-resistant ring 53 contacts the right side surface of the semicircular support ring 2, and its outer side surface contacts the support block 54 sleeved on the threaded support rod 51. An arc-shaped slider 56 is installed on the inner side surface of the bottom end of the support block 54, and the arc surface of the arc-shaped slider 56 contacts the inner ring surface of the semicircular support ring 2. The support block 54 is fixed to the threaded support rod 51 by the cooperation of the locking nut 55 and the washer.

[0053] Specifically, the detection assembly 57 is installed on the arc-shaped slider 56, and then the support block 54 is sleeved on the threaded support rod 51 through the support hole 541. The arc surface of the arc-shaped slider 56 will contact the inner ring surface of the semicircular support ring 2, and the wear-resistant ring 53 will block the support block 54 so that its inner side surface will not contact the outer ring surface of the semicircular support ring 2. Then the washer and the locking nut 55 are fixed to the threaded support rod 51, so that the arc-shaped slider 56 can be detachably installed on the inner ring surface of the semicircular support ring 2. When the complete friction ring rotates, the threaded support rod 51 will rotate through the contact roller 52 and the limiting cavity 22, thereby reducing the efficiency of wear caused by long-term rotation of the threaded support rod 51. At the same time, the arc-shaped slider 56, the support block 54 and the threaded support rod 51 can form a C-shaped connector to buckle on the semicircular support ring 2, thereby improving the stability and firmness of the annular sliding of the arc-shaped slider 56 on the inner ring surface of the semicircular support ring 2.

[0054] In this embodiment, the rolling disassembly assembly 5 further includes a spring member 58 and an arc plate 59. A plurality of spring members 58 are installed in a circumferential array on the wall of the support hole 541 of the support block 54, and an arc plate 59 is connected to the end of each spring member 58. The plurality of arc plates 59 in the circumferential array are formed into a circular ring in the support hole 541 and sleeved on the threaded support rod 51. The inner ends of the plurality of arc plates 59 are arranged with arc chamfered surfaces.

[0055] Specifically, when the support block 54 is sleeved on the threaded support rod 51 through the support hole 541, the multiple arc plates 59 will be squeezed to expand toward the hole wall of the support hole 541, and the multiple spring members 58 will be compressed, so that the support block 54 and the threaded support rod 51 can play an elastic sleeve role, effectively preventing the complete friction ring from slightly jumping in the annular cavity 21 under the drive and rotation of the friction roller 41. Since the support block 54 and the threaded support rod 51 are rigidly sleeved, the arc slider 56 also produces synchronous slight jumping phenomenon, thereby further improving the precision and accuracy of the detection component 57 in measuring the journal wear.

[0056] In this embodiment, T-shaped blind grooves are provided on the back of both ends of the semicircular friction ring 3, and the upper and lower symmetrical T-shaped blind grooves are aligned with each other to form an I-shaped blind groove 31, and a T-shaped slot aligned with the T-shaped blind groove is provided on the back of the semicircular support ring 2, and the upper and lower T-shaped slots are aligned with each other to form an I-shaped slot 23, and the back ends of the two semicircular support rings 2 are both provided with an insertion connection component 6, and the two groups of insertion connection components 6 are respectively slid through the two I-shaped slots 23 and inserted into the two I-shaped blind grooves 31;

[0057] Specifically, after the upper and lower semicircular support rings 2 are completely close to each other and fit together, the upper and lower T-slots will align with each other to form an I-shaped slot 23, and the two T-shaped blind slots will form an I-shaped blind slot 31, and then the insertion connection component 6 will be inserted into the connected I-shaped blind slot 31, so that the upper and lower semicircular friction rings 3 will be connected to form a completed friction ring. At this time, the contact ends of the two semicircular friction rings 3 will fit together precisely, and then the rotation of the friction roller 41 will drive the completely connected friction ring to rotate accurately and slowly in the annular cavity 21, not only will there be no The two completely connected semicircular friction rings 3 will become disconnected during normal rotation. At the same time, the two ends of the two semicircular friction rings 3 cannot fit precisely together, which will cause the friction roller 41 to rub against the gap at the two ends, causing the completed friction ring to shake slightly, thereby affecting the dimensional accuracy of the detection component 57 in measuring the journal wear. When the two semicircular support rings 2 are disengaged from each other, it is necessary to insert the connecting component 6, pull it out from the I-shaped blind groove 31 and slide it to the back of the semicircular support ring 2, so as to facilitate the rapid separation of the upper and lower semicircular support rings 2.

[0058] In this embodiment, the insertion connection component 6 includes an I-shaped plug block 61, a metal sheet 62, a supporting long rod 63, a supporting plate 64, an electric push rod 65 and an electromagnetic block 66. The I-shaped plug block 61 made of silicone material slides through the I-shaped slot 23 and is sealed and inserted into the I-shaped blind slot 31, and a metal sheet 62 is installed on the outer side of the I-shaped plug block 61. At least two supporting long rods 63 are fixed to the back of one end of the semicircular support ring 2, and the two supporting long rods 63 are located on both sides of the T-shaped slot. The distance from the supporting plate 64 to the back of the semicircular support ring 2 is greater than the thickness of the I-shaped plug block 61, and the ends of both are installed with a supporting plate 64. An electric push rod 65 is fixed on the support plate 64, and an electromagnetic block 66 is installed on the piston rod end face of the electric push rod 65 insulated, and the electromagnetic block 66 is magnetically adsorbed and connected to the metal sheet 62.

[0059] Specifically, when the upper and lower semicircular support rings 2 are completely close to each other and fit together, the piston rods of the two electric push rods 65 are controlled to extend, so that they can drive the I-shaped plug block 61 of the silicone material to pass through the I-shaped slot 23 and be squeezed and inserted into the I-shaped blind slot 31 through the mutual adsorption and cooperation of the electromagnetic block 66 and the metal sheet 62, and the squeezed and inserted I-shaped plug block 61 can precisely connect the two ends of the upper and lower semicircular friction rings 3 together, and then the electromagnetic block 66 is powered off and loses the magnetic adsorption of the metal sheet 62, and the piston rod of the electric push rod 65 is retracted into the I-shaped slot 23 by a small distance, and then the two ends are tightly connected. The complete friction ring can rotate stably and safely in the annular cavity 21, and there will be no jumping or shaking during friction transmission due to gaps at the connection positions of the two ends. At the same time, the two semicircular friction rings 3 are connected through the I-shaped plug blocks 61 squeezed and inserted at the two ends, which can also fix the upper and lower semicircular support rings 2. The fixed connection prevents the two connected semicircular support rings 2 from accidentally touching the upper and lower adjustment mechanisms 7 when sliding along the length direction of the shaft neck to measure the wear at different positions, causing the upper and lower semicircular support rings 2 to separate, thereby affecting the normal safety detection and use of the detection component 57; and when the upper and lower semicircular support rings 2 are disconnected, the I-shaped blind grooves 31 on the two semicircular friction rings 3 are aligned with the I-shaped slots 23, and the piston rod of the electric push rod 65 is extended, so that the electromagnetic block 66 after power-on is adsorbed and connected with the metal sheet 62, and then the piston rod of the electric push rod 65 is retracted, so that it drives the I-shaped plug block 61 to slide over the I-shaped slot 23 to the cavity formed by the support plate 64 and the back of the semicircular support ring 2, and because the two support long rods 63 on the support plate 64 are installed on the back of the same semicircular support ring 2, it will not affect the normal separation and sliding of the upper and lower semicircular support rings 2.

[0060] In this embodiment, the up and down adjustment mechanism 7 includes a double-rotation screw rod 71, a screw rod sleeve 72, a mounting block 73, a mounting back plate 74, an intermediate support block 75 and a guide rail slide 76. The upper and lower symmetrical support cross bars 1 are connected to the vertically arranged double-rotation screw rod 71 through two screw rod sleeves 72, and the two ends of the double-rotation screw rod 71 are rotatably mounted with mounting blocks 73. The two mounting blocks 73 are connected to each other through the mounting back plate 74. A servo motor connected to the double-rotation screw rod 71 is fixed on one of the mounting blocks 73. An intermediate support block 75 is fixed on the middle part of the mounting back plate 74, and the double-rotation screw rod 71 is rotatably supported on the intermediate support block 75. A guide rail groove is opened at the end of the mounting block 73, and the guide rail groove is slidably matched with the guide rail slide 76 vertically fixed on the front side of the mounting back plate 74.

[0061] Specifically, the servo motor on the mounting block 73 will drive the double-rotation screw 71 to rotate, and then the two screw sleeves 72 will drive the upper and lower symmetrical support cross bars 1 to slide away from or closer to each other synchronously, and the cooperation of the guide rail slide 76 and the guide rail groove on the mounting back plate 74 can guide the upper and lower symmetrical support cross bars 1 when sliding, and the design of the middle support block 75 can support the rotation of the double-rotation screw 71.

[0062] See also Figure 8 As shown, a methanol engine crankshaft wear test method is applicable to the above-mentioned methanol engine crankshaft wear test device, and the test method comprises the following steps:

[0063] S1: The crankshaft to be tested is hoisted onto the bracket by hoisting equipment for support and fixation;

[0064] S2: Push the two semicircular support rings 2 separated from each other up and down to the journal of the crankshaft to be measured by the pushing device on the bottom surface, and then install the detection component 57 on the arc-shaped slider 56;

[0065] S3: The arc-shaped slider 56 is installed on the corresponding semicircular friction ring 3 through the rolling disassembly assembly 5, and the upper and lower adjustment mechanism 7 drives the upper and lower semicircular support rings 2 to completely close and fit together;

[0066] S4: Drive the insertion connection component 6 to connect the two semicircular friction rings 3 to form a complete friction ring. Drive the friction mechanism 4 to drive the complete friction ring to rotate in the annular cavity 21. The detection component 57 will detect the wear of the journal.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0068] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A methanol engine crankshaft wear test device, characterized in that: It comprises a semicircular support ring (2) and a support cross bar (1); The two semicircular support rings (2) are symmetrically arranged in an upper and lower direction, and the outer ring side surface of each semicircular support ring (2) is horizontally connected to a support cross bar (1), and the upper and lower symmetrical support cross bars (1) are connected via an upper and lower adjustment mechanism (7); An annular cavity (21) is provided inside the two semicircular support rings (2), and a limiting cavity (22) is provided on the outer cavity wall of the annular cavity (21), and a semicircular friction ring (3) is installed inside the two annular cavities (21); The semicircular support ring (2) is provided with a driving friction mechanism (4) for driving the two semicircular friction rings (3) connected to each other to rotate; The right sides of the two semicircular friction rings (3) are detachably mounted with arc-shaped slide blocks (56) via rolling disassembly assemblies (5), and a detection assembly (57) is mounted on the arc-shaped slide blocks (56); The driving friction mechanism (4) comprises a friction roller (41), a limiting roller (42), a lifting roller (43) and a rotating shaft (44); the radial width of the annular cavity (21) is greater than the radial width of the limiting cavity (22); the radial width of the semicircular friction ring (3) is less than the radial width of the annular cavity (21) but greater than the radial width of the limiting cavity (22); the inner ring wall of the semicircular friction ring (3) is in contact with the inner diameter wall of the annular cavity (21); the upper and lower symmetrical friction rollers (41) are respectively rotatably mounted in the upper and lower annular cavities (21) via two rotating shafts (44); the friction rollers (41) are in frictional contact with the outer ring surfaces of the semicircular friction rings (3); the rotating shaft (44) of the friction rollers (41) is fixed to the back of the semicircular support ring (2) The semicircular support ring (2) is connected to the output shaft of a servo motor, at least two limit rollers (42) are rotatably mounted in the annular cavity (21) inside the upper semicircular support ring (2) via a rotating shaft (44), and the limit rollers (42) are symmetrically arranged on both sides of the friction roller (41) and are in rolling contact with the outer annular surface of the semicircular friction ring (3), at least two lifting rollers (43) are rotatably mounted in the annular cavity (21) inside the lower semicircular support ring (2) via a rotating shaft (44), and the lifting rollers (43) are also symmetrically arranged on both sides of the lower friction roller (41) and are in rolling contact with the outer annular surface of the semicircular friction ring (3), and the friction roller (41), the limit roller (42) and the lifting roller (43) are co-centered with the connected semicircular friction ring (3); The back sides of the two ends of the semicircular friction ring (3) are provided with T-shaped blind grooves, and the upper and lower symmetrical T-shaped blind grooves are aligned with each other to form an I-shaped blind groove (31); the back side of the semicircular support ring (2) is provided with a T-shaped slot aligned with the T-shaped blind groove, and the upper and lower T-shaped slots are aligned with each other to form an I-shaped slot (23); the back ends of the two semicircular support rings (2) are both provided with an insertion connection component (6), and the two groups of insertion connection components (6) are respectively slid through the two I-shaped slots (23) and inserted into the two I-shaped blind grooves (31); The insert connection assembly (6) comprises an I-shaped plug block (61), a metal sheet (62), a supporting long rod (63), a supporting plate (64), an electric push rod (65) and an electromagnetic block (66); the I-shaped plug block (61) made of silicone material slides through the I-shaped slot (23) and is sealed and inserted into the I-shaped blind slot (31); the metal sheet (62) is installed on the outer side of the I-shaped plug block (61); at least two supporting long rods (63) are fixed to the back of one end of the semicircular support ring (2); the two supporting long rods (63) are located on both sides of the T-shaped slot; the distance between the supporting plate (64) and the back of the semicircular support ring (2) is greater than the thickness of the I-shaped plug block (61); the ends of the two are installed with a supporting plate (64); the electric push rod (65) is fixed on the supporting plate (64); the electromagnetic block (66) is installed on the end face of the piston rod of the electric push rod (65) insulated; and the electromagnetic block (66) is connected to the metal sheet (62) by magnetic adsorption.

2. A methanol engine crankshaft wear testing device according to claim 1, characterized in that: The rolling disassembly assembly (5) comprises a threaded support rod (51), a contact roller (52), a wear-resistant ring (53), a support block (54) and a locking nut (55); the threaded support rod (51) having a threaded structure is fixed to the outer side surface of the semicircular friction ring (3); the rod body of the threaded support rod (51) passes through the limiting cavity (22) and is located on the right side surface of the semicircular support ring (2); the contact roller (52) is rotatably sleeved on the threaded support rod (51), and the contact roller (52) contacts the cavity wall of the limiting cavity (22). The outer end surface of the contact roller (52) is provided with a wear-resistant ring (53), and the inner side surface of the wear-resistant ring (53) contacts the right side surface of the semicircular support ring (2), and the outer side surface thereof contacts a support block (54) sleeved on the threaded support rod (51), and an arc-shaped slider (56) is installed on the inner side surface of the bottom end of the support block (54), and the arc surface of the arc-shaped slider (56) contacts the inner ring surface of the semicircular support ring (2), and the support block (54) is fixed to the threaded support rod (51) by the cooperation of a locking nut (55) and a washer.

3. A methanol engine crankshaft wear testing device according to claim 2, characterized in that: The rolling disassembly assembly (5) further comprises a spring member (58) and an arc-shaped plate (59); a plurality of spring members (58) are mounted in a circular array on the wall of the support hole (541) of the support block (54); and the end of each spring member (58) is connected to the arc-shaped plate (59); the plurality of arc-shaped plates (59) in the circular array are arranged in a circular ring shape in the support hole (541) and sleeved on the threaded support rod (51); and the inner ends of the plurality of arc-shaped plates (59) are arranged with arc-shaped chamfered surfaces.

4. A methanol engine crankshaft wear testing device according to claim 1, characterized in that: The up-down adjustment mechanism (7) comprises a double-rotation screw (71), a screw sleeve (72), a mounting block (73), a mounting back plate (74), an intermediate support block (75) and a guide rail slide (76). The upper and lower symmetrical support cross bars (1) are connected to the vertically arranged double-rotation screw (71) through two screw sleeves (72), and the two ends of the double-rotation screw (71) are rotatably mounted with mounting blocks (73). The two mounting blocks (73) are mutually connected through the mounting back plate (74). A servo motor connected to the double-rotation screw (71) is fixed on one of the mounting blocks (73). The middle part of the mounting back plate (74) is fixed with an intermediate support block (75), and the double-rotation screw (71) is rotatably supported on the intermediate support block (75). The ends of the mounting blocks (73) are provided with guide rail grooves, and the guide rail grooves are slidably matched with the guide rail slides (76) vertically fixed on the front side of the mounting back plate (74).

5. A methanol engine crankshaft wear test method, which is applicable to the methanol engine crankshaft wear test device according to any one of claims 1 to 4, characterized in that: The test method includes the following steps: S1: The crankshaft to be tested is hoisted onto the bracket by hoisting equipment for support and fixation; S2: Push the two semicircular support rings (2) separated from each other up and down to the journal of the crankshaft to be measured by a pushing device on the bottom surface, and then install the detection component (57) on the arc-shaped slider (56); S3: The arc-shaped slider (56) is installed on the corresponding semicircular friction ring (3) through the rolling disassembly assembly (5), and the upper and lower adjustment mechanism (7) drives the upper and lower semicircular support rings (2) to completely close together; S4: The drive insert connection component (6) works to connect the two semicircular friction rings (3) to form a complete friction ring. The driving friction mechanism (4) drives the complete friction ring to rotate in the annular cavity (21). The detection component (57) detects the wear of the journal.

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