Diesel engine gear ring runout measuring device and measuring method

Abstract

The invention discloses a diesel engine gear ring runout measuring device, comprising a magnetic seat, an articulated bracket and a detection rod assembly, wherein one end of the connecting rod of the articulated bracket is fixed in a cylinder, and the other end of the connecting rod is hinged to an interface in the middle of the detection rod assembly. A stepped through hole is provided at the center of the outer sleeve of the detection rod assembly, a compression spring is located in one end of the stepped through hole and is sleeved on the upper part of the telescopic rod, and a distance ring and a convex shoulder in the middle of the telescopic rod are respectively pressed on the two ends of the compression spring. The two ends of the telescopic rod extend out of the two ends of the outer sleeve respectively, one end of the telescopic rod is fixedly connected to one end of a roller mechanism, and a telescopic rod anti-rotation mechanism is arranged on one side of the outer sleeve and the telescopic rod. The measuring method of the invention comprises: A assembling the gear ring runout measuring device; B installing the gear ring runout measuring device on the engine base; C detecting the gear ring runout. The device of the invention is compact and has high precision, low manufacturing cost, and a simple and reliable measuring method. It effectively avoids the discrete magnetoelectric sensor from being damaged by the top of the gear ring during turning, thereby improving the assembly efficiency of the diesel engine.

Description

Technical Field

[0001] The invention relates to a vibration measuring device and method, in particular to a gear ring vibration measuring device and method during diesel engine assembly, belonging to the technical field of internal combustion engine assembly. Background Art

[0002] In order to reduce the operating costs of ships, shipping companies use diesel engine shaft generators to maintain ship operation, which can reduce the use time of generators, reduce fuel consumption, and reduce shipping costs. When using a shaft generator, since the space at the free end of the diesel engine is occupied by the shaft generator, the integrated angle encoder used in the diesel engine control system cannot be installed at the free end of the diesel engine. The diesel engine ring gear (hereinafter referred to as the ring gear) can only be installed on the side of the flywheel of the diesel engine. Eight discrete magnetoelectric sensors are arranged around the ring gear to replace the integrated angle encoder to measure the speed and crankshaft position of the diesel engine, and provide the signals required for diesel engine injection, exhaust valve opening and closing, etc. Due to the large diameter of the ring gear installed on the diesel engine, it is limited by the processing equipment. The annular ring gear can only be divided into several arc segment ring gears for segment processing, and then the several arc segment ring gears assembled on the flywheel are spliced ​​into an annular ring gear. This assembled ring gear has a large cumulative error due to processing errors and installation errors, resulting in the ring gear beating out of range. The distance range of the sensor sensing interval is: the distance to the tooth top is between 0.1-4mm. Due to the lack of a special measuring instrument to measure the gear ring runout, on-site assembly workers can only judge whether a tooth is missing by observing the flashing degree of the signal light on the discrete magnetoelectric sensor during the slow turning process. At the same time, they also need to observe whether the tooth top collides with the discrete magnetoelectric sensor. If the discrete magnetoelectric sensor is damaged, it needs to be replaced with a new one, which increases the assembly cost and consumes a lot of time, seriously affecting the assembly efficiency of the diesel engine. Summary of the invention

[0003] The purpose of the present invention is to provide a diesel engine gear ring runout measuring device and a detection method which can perform detection efficiently and quickly.

[0004] The present invention is achieved through the following technical solutions:

[0005] A diesel engine gear ring runout measuring device comprises a magnetic seat, an articulated bracket and a detection rod assembly, the articulated bracket comprises an articulated ear plate, a cylinder and a connecting rod, one end of the articulated ear plate is vertically fixedly connected to the cylinder, and the other end of the articulated ear plate is articulated with the ear plate at one end of the magnetic seat by an articulated screw; one end of the connecting rod is fixed in the cylinder by a set screw, and the other end of the connecting rod is articulated with an interface in the middle of the detection rod assembly by an articulated screw; the detection rod assembly comprises an outer sleeve, a telescopic rod, a compression spring, a distance ring, a telescopic rod anti-rotation mechanism and a roller mechanism, the center of the outer sleeve is provided with a stepped through hole, one end of the telescopic rod passes through the stepped through hole, the compression spring is located in one end of the stepped through hole and is sleeved on the upper part of the telescopic rod, the distance ring is fixed on one end of the outer sleeve, and the distance ring and the convex shoulders in the middle of the telescopic rod are respectively pressed on the two ends of the compression spring; the lower end of the telescopic rod extends out of the lower end of the outer sleeve, and the end head of one end of the telescopic rod is fixedly connected to one end of the roller mechanism, and the telescopic rod anti-rotation mechanism is arranged on one side of the outer sleeve and the telescopic rod.

[0006] The purpose of the present invention can be further achieved by the following technical measures.

[0007] Furthermore, one end of the stepped through hole is a countersink of the distance ring matching the distance ring, the middle of the stepped through hole is a compression spring countersink with a diameter smaller than the countersink of the distance ring, and the other end of the stepped through hole is a through hole matching one end of the telescopic rod, and the diameter of the through hole is smaller than the countersink of the compression spring; one end of the telescopic rod extends out of the distance ring at the upper end of the outer sleeve, and the other end of the telescopic rod passing through the through hole extends out of the lower end of the outer sleeve, and the upper and lower sides of the distance ring are respectively limited by the hole retaining ring and the countersink step of the distance ring. One end of the telescopic rod is provided with a scale with a resolution of millimeters.

[0008] Furthermore, the telescopic rod anti-rotation mechanism comprises an anti-rotation screw and an axial groove at the lower part of the telescopic rod, the anti-rotation screw is screwed into the lower part of the cylinder, and one end of the anti-rotation screw extends into the axial groove.

[0009] Furthermore, the roller mechanism includes a roller seat, a roller and a roller pin, the roller is embedded in the groove at the lower end of the roller seat, the roller is hinged to the roller seat through the roller pin, and the upper end of the roller seat is fixed to the lower end of the telescopic rod; the roller uses a ball bearing.

[0010] A method for measuring a diesel engine gear ring runout measurement device comprises the following steps:

[0011] AAssembly of gear ring runout measuring device

[0012] A1) Assemble the detection rod assembly: insert one end of the telescopic rod into the stepped through hole in the center of the outer sleeve until the lower side of the convex shoulder in the middle of the telescopic rod abuts against the bottom of the compression spring countersunk hole in the stepped through hole, and the two ends of the telescopic rod extend out of the two ends of the outer sleeve respectively; then put the compression spring on the other end of the telescopic rod until the lower end of the compression spring abuts against the upper side of the convex shoulder in the middle of the telescopic rod, and then press the distance ring into the distance ring countersunk hole at the upper end of the outer sleeve, and fix the hole to the upper side of the distance ring with a retaining ring, so that the upper and lower ends of the compression spring are respectively squeezed by the distance ring and the convex shoulder to generate pre-pressure; then press the upper end of the roller seat into and fix it on one end of the telescopic rod, and then embed the roller into the notch at the lower end of the roller seat, and then cross the roller pin through the roller seat and the roller to hinge the roller with the roller seat, and rivet the two ends of the roller pin to the roller seat to complete the assembly of the detection rod assembly;

[0013] A2) Assemble the articulated bracket and connect it with the outer sleeve: hinge the other end of the articulated ear plate with the ear plate at one end of the magnetic base through an articulated screw, fix one end of the connecting rod in the cylinder through a set screw, and finally hinge the other end of the connecting rod with the interface in the middle of the outer sleeve of the detection rod combination through an articulated screw to complete the assembly of the articulated bracket and the connection between the articulated bracket and the outer sleeve;

[0014] B. The ring gear runout measuring device is installed on the machine base.

[0015] Install the ring gear runout measuring device on one side of the ring gear: first, fix the magnetic seat on the upper side of the machine base or the vertical side of the machine base by suction, loosen the set screw on the cylinder, adjust the length of the connecting rod extending out of the cylinder and rotate the connecting rod so that the roller is aligned with the center of the side ring gear and abuts against the tooth top, and the axis of the roller is parallel to the axis of the ring gear; finally, tighten the set screw and each hinge screw so that the whole set of ring gear runout measuring device cannot shake, and the installation of the ring gear runout measuring device is completed;

[0016] C Detection of ring gear runout

[0017] Crank the gear slowly to complete the detection; crank the gear slowly, and the gear ring will rotate accordingly. When the roller passes over the tooth top, observe the scale value of the other end of the telescopic rod extending out of the upper end of the outer sleeve, and record it as the initial value; crank the gear for one circle, and record the maximum scale value and minimum scale value of the tooth top runout displayed at the other end of the telescopic rod. Subtract the maximum scale value from the minimum scale value to obtain the change value of the tooth top runout. If the change value is within the working range of the discrete magnetoelectric sensor, the requirement is met; if the change value exceeds the working range of the discrete magnetoelectric sensor, it is necessary to adjust the arc segment gear ring where the maximum scale value is located, and use gear grinding or reinstall the arc segment gear ring so that the difference between the maximum scale value and the minimum scale value of the tooth top is within the working range of the discrete magnetoelectric sensor, and the diesel engine gear ring runout detection and adjustment is completed.

[0018] The detection rod assembly of the present invention uses the elastic force of the compression spring in the outer sleeve to make the rollers that sequentially abut against the tops of the teeth of the slowly rotating gear ring push the telescopic rod to move axially, so that the runout of the tops of the teeth of the gear ring can be accurately displayed through the scale value of the telescopic rod extending out of the outer sleeve. The device is small and high in precision, low in manufacturing cost, and the measuring method is simple and reliable. It effectively avoids the discrete magnetoelectric sensor from being damaged by the top of the gear ring during turning, and improves the assembly efficiency of the diesel engine.

[0019] Advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments thereof, which are given by way of example only with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural exploded diagram of the present invention;

[0021] Figure 2 It is an enlarged structural diagram of the detection rod assembly of the present invention;

[0022] Figure 3 It is a stereoscopic diagram of the magnetic base of the present invention being fixed on the top surface of the machine base to detect the ring gear runout;

[0023] Figure 4 It is a stereoscopic diagram of the magnetic base of the present invention being fixed on the side of the machine base for detecting the ring gear runout. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] In the description of the present invention, terms indicating orientation or position such as "up", "down", "left" and "right" are based on the orientation shown in the drawings and are only for simplifying the description, and do not indicate or imply that the present invention must have a specific orientation or position.

[0026] like Figure 1 to Figure 4 As shown, this embodiment includes a magnetic base 1, an articulated bracket 2 and a detection rod assembly 3. The articulated bracket 2 includes an articulated ear plate 21, a cylinder 22 and a connecting rod 23. Figure 1 The upper end of the middle hinged ear plate 21 is vertically welded to the cylinder 22, and the lower end of the hinged ear plate 21 is hinged to the ear plate 11 at the upper end of the magnetic base 1 through a hinge screw 24. The right end of the connecting rod 23 is fixed in the cylinder 22 through a set screw 25, and the left end of the connecting rod 23 is hinged to the interface 311 in the middle of the detection rod assembly 3 through a hinge screw 24.

[0027] The detection rod assembly 3 includes an outer sleeve 31, a telescopic rod 32, a compression spring 33, a distance ring 34, a telescopic rod anti-rotation mechanism 35 and a roller mechanism 36. A stepped through hole 37 is provided at the center of the outer sleeve 31. The lower end of the telescopic rod 32 passes through the stepped through hole 37. The compression spring 33 is located at one end of the stepped through hole 37 and is sleeved on the upper part of the telescopic rod 32. The upper end of the stepped through hole 37 is a distance ring countersunk hole 371 matching the distance ring 34. The middle part of the stepped through hole 37 is a compression spring countersunk hole 372 with a diameter smaller than the distance ring countersunk hole 371. The lower end of the stepped through hole 37 is a through hole 373 matching the lower end of the telescopic rod 32. The diameter of the through hole 373 is smaller than the compression spring countersunk hole 372. The upper end of the telescopic rod 32 extends out of the distance ring 34 at the upper end of the outer sleeve 31. The lower end of the telescopic rod 32 passing through the through hole 373 extends out of the lower end of the outer sleeve 31, and the upper and lower sides of the distance ring 34 are respectively limited by the hole retaining ring 38 and the distance ring counterbore 371. The distance ring 34 and the convex shoulder 321 in the middle of the telescopic rod 32 are respectively pressed on the two ends of the compression spring 33. The lower end of the telescopic rod 3 extends out of the end of the outer sleeve 31. The upper end of the telescopic rod 32 is provided with a scale 322 with a resolution of millimeters, which can be used to detect the actual data of the gear ring runout.

[0028] The telescopic rod anti-rotation mechanism 35 is arranged on one side of the outer sleeve 31 and the telescopic rod 32, and includes an anti-rotation screw 351 and an axial groove 323 at the lower part of the telescopic rod 32. The anti-rotation screw 351 is screwed into the lower part of the cylinder 31, and one end of the anti-rotation screw 351 extends into the axial groove 323, so that the telescopic rod 32 can only move up and down but not rotate around its axis. When the ring gear 10 rotates slowly, it can ensure that the axis of the roller mechanism 36 resting on the top of the tooth is always parallel to the axis of the ring gear 10, thereby improving the accuracy of the detection of the ring gear 10.

[0029] The roller mechanism 36 includes a roller seat 361, a roller 362 and a roller pin 363. The roller 361 is embedded in the notch at the lower end of the roller seat 362. The roller 362 is hinged to the roller seat 361 through the roller pin 363. The upper end of the roller seat 361 is fixed to the lower end of the telescopic rod 32. The roller 361 uses a ball bearing.

[0030] A method for measuring a diesel engine gear ring runout measurement device comprises the following steps:

[0031] AAssembly of gear ring runout measuring device

[0032] A1) Assemble the inspection rod assembly 3: insert one end of the telescopic rod 32 into the stepped through hole 37 in the center of the outer sleeve 31, until the lower side of the boss 321 in the middle of the telescopic rod 32 abuts against the bottom of the compression spring countersunk hole 371 of the stepped through hole, and the two ends of the telescopic rod 32 extend out of the two ends of the outer sleeve 31 respectively; then put the compression spring 33 on the upper end of the telescopic rod 32, until the lower end of the compression spring 33 abuts against the upper side of the boss 321 in the middle of the telescopic rod 32, and then press the distance ring 34 into the distance ring countersunk hole 371 at the upper end of the outer sleeve 31, and fix the hole retaining ring 38 on the upper side of the distance ring 34, so that the upper and lower ends of the compression spring 33 are squeezed by the distance ring 34 and the boss 321 respectively to generate pre-pressure. Next, the upper end of the roller seat 361 is pressed and fixed on the lower end of the telescopic rod 32, and the roller 362 is embedded in the groove at the lower end of the roller seat 361. The roller pin 363 is then passed horizontally through the roller seat 361 and the roller 362 to hinge the roller 362 with the roller seat 361, and the two ends of the roller pin 363 are riveted and fixed to the roller seat 361 respectively, thereby completing the assembly of the detection rod assembly 3.

[0033] A2) Assemble the articulated bracket 2 and connect it to the outer sleeve 31: hinge the other end of the articulated ear plate 21 to the ear plate 11 at one end of the magnetic base 1 by means of the articulated screw 24, fix one end of the connecting rod 23 in the cylinder 22 by means of the set screw 25, and finally articulate the other end of the connecting rod 23 to the interface 311 in the middle of the outer sleeve 31 of the detection rod assembly 3 by means of the articulated screw 24, thereby completing the assembly of the articulated bracket 2 and the connection between the articulated bracket 2 and the outer sleeve 31.

[0034] B. The ring gear runout measuring device is installed on the machine base.

[0035] Install the ring gear runout measuring device on one side of the ring gear 10: First, fix the magnetic seat 1 on the Figure 3 On the upper side 201 of the base shown, or Figure 4 On the vertical side surface 202 of the machine base shown in the figure, loosen the set screw 25 on the cylinder 31, adjust the length of the connecting rod 23 extending out of the cylinder 31 and rotate the connecting rod 23 so that the roller 232 is aligned with the center of the side gear ring 10 and abuts against the tooth top, and the axis of the roller 232 is parallel to the axis of the gear ring 10. Finally, tighten the set screw 25 and each hinge screw 24 so that the entire gear ring runout measuring device cannot shake, and the installation of the gear ring runout measuring device is completed.

[0036] C Detection of ring gear 10 runout

[0037] Slowly crank the gear to complete the test; slowly crank the gear, and the gear ring 10 will rotate accordingly. When the roller 362 passes over the top of the tooth, observe the scale value of the other end of the telescopic rod 32 extending out of the upper end of the outer sleeve 31, and record it as the initial value. Crank the gear for one circle, record the maximum scale value and the minimum scale value of the tooth top jump displayed at the other end of the telescopic rod 32, and subtract the maximum scale value from the minimum scale value to obtain the change value of the tooth top jump. If the change value is within the working range of the discrete magnetoelectric sensor, the requirement is met; if the change value exceeds the working range of the discrete magnetoelectric sensor, it is necessary to adjust the arc segment gear ring 101 where the maximum scale value is located, and use gear grinding or reinstall the arc segment gear ring 101 so that the difference between the maximum scale value and the minimum scale value of the tooth top is within the working range of the discrete magnetoelectric sensor, and complete the diesel engine gear ring jump detection and adjustment.

[0038] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A diesel engine gear ring runout measuring device, characterized in that: The cam is connected to the wheel hub by a spring, and the wheel hub has two stop faces camming it, the stop faces camming in turn, and the stop faces camming in turn are connected the wheel hub to the wheel hub by a spring, and the stop faces camming in turn are connected the wheel hub to the wheel hub. One end of the stepped through hole is a distance ring countersink matching the distance ring, the middle of the stepped through hole is a compression spring countersink with a diameter smaller than the distance ring countersink, and the other end of the stepped through hole is a through hole matching one end of the telescopic rod, the through hole diameter is smaller than the compression spring countersink; one end of the telescopic rod extends out of the distance ring at the upper end of the outer sleeve, and the other end of the telescopic rod passing through the through hole extends out of the lower end of the outer sleeve, and the upper and lower sides of the distance ring are respectively limited by the hole retaining ring and the distance ring countersink step; The telescopic rod anti-rotation mechanism comprises an anti-rotation screw and an axial groove at the lower part of the telescopic rod. The anti-rotation screw is screwed into the lower part of the cylinder, and one end of the anti-rotation screw extends into the axial groove.

2. The diesel engine gear ring runout measuring device according to claim 1, characterized in that: One end of the telescopic rod is provided with a scale with a resolution of millimeters.

3. The diesel engine gear ring runout measuring device according to claim 1, characterized in that: The roller mechanism comprises a roller seat, a roller and a roller pin. The roller is embedded in a notch at the lower end of the roller seat. The roller is hinged to the roller seat through the roller pin. The upper end of the roller seat is fixed to the lower end of the telescopic rod. The roller is equipped with a ball bearing.

4. A method for measuring the ring gear runout of a diesel engine according to claim 1, characterized in that: The following steps are involved: AAssembly of gear ring runout measuring device A1) Assemble the detection rod assembly: insert one end of the telescopic rod into the stepped through hole in the center of the outer sleeve until the lower side of the convex shoulder in the middle of the telescopic rod abuts against the bottom of the compression spring countersunk hole in the stepped through hole, and the two ends of the telescopic rod extend out of the two ends of the outer sleeve respectively; then put the compression spring on the other end of the telescopic rod until the lower end of the compression spring abuts against the upper side of the convex shoulder in the middle of the telescopic rod, and then press the distance ring into the distance ring countersunk hole at the upper end of the outer sleeve, and fix the hole on the upper side of the distance ring with a retaining ring, so that the upper and lower ends of the compression spring are squeezed by the distance ring and the convex shoulder respectively to generate pre-pressure; then press the upper end of the roller seat into and fix it on one end of the telescopic rod, and then embed the roller into the groove at the lower end of the roller seat, and then cross the roller pin through the roller seat and the roller, so that the roller is hinged to the roller seat, and rivet the two ends of the roller pin to the roller seat respectively, and complete the assembly of the detection rod assembly; A2) Assemble the articulated bracket and connect it with the outer sleeve: hinge the other end of the articulated ear plate with the ear plate at one end of the magnetic base through the articulated screw, fix one end of the connecting rod in the cylinder through the set screw, and finally hinge the other end of the connecting rod with the interface in the middle of the outer sleeve of the detection rod combination through the articulated screw to complete the assembly of the articulated bracket and the connection between the articulated bracket and the outer sleeve; B. The ring gear runout measuring device is installed on the machine base. Install the ring gear runout measuring device on one side of the ring gear: first, fix the magnetic seat on the upper side of the machine base or the vertical side of the machine base by suction, loosen the set screw on the cylinder, adjust the length of the connecting rod extending out of the cylinder and rotate the connecting rod so that the roller is aligned with the center of the side ring gear and abuts against the tooth top, and the axis of the roller is parallel to the axis of the ring gear; finally, tighten the set screw and each hinge screw so that the whole set of ring gear runout measuring device cannot shake, and the installation of the ring gear runout measuring device is completed; C Detection of ring gear runout The detection is completed by slowly cranking the engine; the gear ring rotates slowly, and when the roller passes over the tooth top, observe the scale value of the other end of the telescopic rod extending out of the upper end of the outer sleeve, and record it as the initial value; crank the engine for one circle, and record the maximum and minimum scale values ​​of the tooth top runout displayed at the other end of the telescopic rod. The maximum and minimum scale values ​​are subtracted from each other to obtain the change value of the tooth top runout. If the change value is within the working range of the discrete magnetoelectric sensor, the requirement is met; if the change value exceeds the working range of the discrete magnetoelectric sensor, it is necessary to adjust the arc segment gear ring where the maximum scale value is located, and use gear grinding or reinstall the arc segment gear ring so that the difference between the maximum and minimum scale values ​​of the tooth top is within the working range of the discrete magnetoelectric sensor, and the diesel engine gear ring runout detection and adjustment is completed.

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