Installation and verification device for roller guide cylinder lining of medium-speed diesel engine

Abstract

The utility model discloses a medium-speed diesel engine roller guide cylinder bushing installation verification device, which comprises a first verification mandrel, a second verification mandrel, a third verification mandrel and a cross rod, the first verification mandrel, the second verification mandrel and the third verification mandrel are provided with guide flat keys, and the three verification mandrels are respectively, vertically and fixedly connected with the cross rod through positioning pins. The symmetry degree tolerance between the symmetry center planes M-M of the three roller guide cylinder lining inner hole key grooves and the symmetry degree tolerance between the symmetry center planes M-M and the vertical plane N-N of the center of the cam shaft are both smaller than or equal to 0.10 mm. The device is easy to operate, time-saving and labor-saving, remarkably improves the working efficiency of checking the direction of the key slot of the inner hole of the bushing of the roller guide cylinder after installation, and has the effects of safety in operation, cost reduction and efficiency improvement.

Description

Technical Field

[0001] The utility model relates to a detection and correction device for valve mechanism parts of a diesel engine after installation, in particular to a detection and correction device for valve mechanism sleeve parts of a medium-speed (300<n≤1000r / min) diesel engine after installation, belonging to the technical field of diesel engine assembly. Background Art

[0002] The roller guide bushing is an important part of the valve train of a medium-speed diesel engine. It is used to precisely guide the rise and fall of the roller guide bushing, avoiding abnormal damage to the roller and camshaft due to poor alignment at the contact points between the rollers of the roller guide bushings used for fuel control, intake control, and exhaust control and the corresponding cams of the camshaft.

[0003] Currently, the inspection and correction of the inner keyway of the roller guide bushing installed in the frame is performed using simple tools, which requires a high level of operator skill. First, the longitudinal centerline XX of the three roller guide bushings is marked on the frame mounting surface. Then, a steel ruler is used to check whether the centerline of the inner keyway of each roller guide bushing coincides with the longitudinal centerline XX. If not, a specially made correction bar with the same plane dimensions as the guide flat key and longer than the guide flat key is inserted into the inner keyway of the roller guide bushing. Then, a copper rod is used to tap the head of the correction bar from the side, causing the roller guide bushing to rotate around its axis until the centerline of the inner keyway of the roller guide bushing coincides with the longitudinal centerline XX, thus completing the correction of the inner keyway of the roller guide bushing. The accuracy of using this device to check the inner keyway of the roller guide sleeve and guide sleeve is low. If you are not careful, the inner keyway of the roller guide sleeve and guide sleeve will be deformed and fail, which will seriously affect the installation quality of the roller guide sleeve and guide sleeve, and the work efficiency is very low. Utility Model Content

[0004] The utility model aims to provide a device for installing and verifying a roller guide sleeve of a medium-speed diesel engine, which has the advantages of simple structure, high efficiency and high accuracy in detection and correction.

[0005] The utility model is achieved through the following technical solutions:

[0006] The cam is secured to the first, second and third check spindles by means of a locating pin which extends horizontally from the top of the first check spindle to the bottom of the second check spindle and the cam is secured to the bottom of the second check spindle. On both sides of the calibration spindle, the guide flat key on the second calibration spindle faces the guide flat key on the third calibration spindle, and are respectively in the same orientation as the intake control roller guide sleeve inner hole keyway, the fuel control roller guide sleeve inner hole keyway and the intake control roller guide sleeve inner hole keyway; the symmetry tolerance between the symmetry center planes MM of the three roller guide sleeve inner hole keyways and the symmetry tolerance between the symmetry center planes MM and the vertical plane NN of the camshaft center are both ≤0.10mm; the center distance h1 between the first calibration spindle and the second calibration spindle is equal to the center distance h2 between the second calibration spindle and the third calibration spindle, and the center distance h1 and the center distance h2 respectively match the center distance H1 of the intake control roller guide sleeve inner hole and the fuel control roller guide sleeve inner hole installed on the frame, and the center distance H2 of the fuel control roller guide sleeve inner hole and the exhaust control roller guide sleeve inner hole.

[0007] The purpose of the utility model can be further achieved by the following technical measures.

[0008] Furthermore, limit pins are respectively provided at both ends of the crossbar, and the limit pins are respectively located outside the first calibration spindle and outside the third calibration spindle; the limit pins are cotter pins.

[0009] Furthermore, the clearance between the calibration spindle and the corresponding inner hole of the roller guide sleeve is 0.04~0.06mm; the clearance between the guide flat key and the corresponding keyway of the inner hole of the roller guide sleeve is 0.03~0.05mm; the clearance between the cross bar and the first calibration spindle transverse hole, the second calibration spindle transverse hole and the third calibration spindle transverse hole are all 0.06~0.08mm.

[0010] Furthermore, the first calibration mandrel, the second calibration mandrel and the third calibration mandrel are all circular tube structures with a central through hole.

[0011] Furthermore, the material of the calibration spindle is aluminum of grade ZL102, and the material of the guide flat key is high-quality carbon steel of grade Q235A.

[0012] The utility model adopts a triple-mounted structure in which a cross bar and three calibration mandrels are vertically fixedly connected. The three calibration mandrels can be used simultaneously to detect the orientation of the keyway of the inner hole of the roller guide sleeve after installation. After pulling out the corresponding positioning pin and flipping the corresponding calibration mandrel, the cross bar, calibration mandrel and guide flat key of the cross structure can be used to quickly and accurately correct the roller guide sleeve that is installed out of position. The utility model can help the operator quickly and smoothly correct the roller guide sleeve to the correct orientation after installation. It is not only easy to operate, but also saves time and effort, significantly improving the efficiency of the work of verifying the orientation of the keyway of the inner hole of the roller guide sleeve after installation, and has the effects of safe operation, cost reduction and efficiency improvement.

[0013] Advantages and features of the present invention will be illustrated and explained through the following non-limiting description of preferred embodiments, which are given as examples only with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the installation verification device of the utility model;

[0015] Figure 2 This is a schematic diagram of using the installation verification device of the utility model to verify the keyway of the inner hole of the roller guide cylinder bushing;

[0016] Figure 3 yes Figure 2 AA enlarged cross-sectional view; DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and an embodiment of the present invention for calibrating a roller guide sleeve bushing of a V28 / 32SS medium-speed diesel engine.

[0018] like Figures 1 to 3As shown, the installation and verification device of the present invention includes a first verification spindle 1 for respectively verifying the keyway 81 of the inner hole of the intake control roller guide sleeve bushing, a second verification spindle 2 for verifying the keyway 82 of the inner hole of the fuel control roller guide sleeve bushing, and a third verification spindle 3 for verifying the keyway 83 of the inner hole of the exhaust control roller guide sleeve bushing, and a crossbar 4. The guide flat keys 6 are respectively fixed in the longitudinal keyways 11 corresponding to the first verification spindle 1, the second verification spindle 2, and the third verification spindle 3. The crossbar 4 sequentially crosses the upper ends of the first verification spindle 1, the second verification spindle 2, and the third verification spindle 3, which are arranged at intervals, from left to right. The crossbar 4 is respectively fixedly connected vertically to the first verification spindle 1, the second verification spindle 2, and the third verification spindle 3 by means of positioning pins 5 that cross the upper ends of the first verification spindle 1, the second verification spindle 2, the third verification spindle 3, and the crossbar 4. The guide flat key 6 on the first calibration spindle 1 and the guide flat key 6 on the third calibration spindle 2 are respectively facing the two sides of the second calibration spindle 2, and the guide flat key 6 on the second calibration spindle 2 is facing the guide flat key 6 on the third calibration spindle 3, and are respectively in the same orientation as the intake control roller guide cylinder bushing inner hole keyway 81, the fuel control roller guide cylinder bushing inner hole keyway 82 and the intake control roller guide cylinder bushing inner hole keyway 83. The symmetry tolerance between the symmetry center planes MM of the three roller guide cylinder bushing inner hole keyways and the symmetry tolerance between the symmetry center planes MM and the vertical plane NN of the camshaft center are both ≤0.10mm, thereby avoiding abnormal wear on the camshaft due to the roller deviation of the roller guide cylinder and improving the reliability of the valve mechanism. The center distance h1 between the first calibration spindle and the second calibration spindle is equal to the center distance h2 between the second calibration spindle and the third calibration spindle. The center distance h1 and the center distance h2 respectively match the center distance H1 of the inner hole of the intake control roller guide sleeve and the inner hole of the fuel control roller guide sleeve installed on the frame 10, and the center distance H2 of the inner hole of the fuel control roller guide sleeve and the inner hole of the exhaust control roller guide sleeve, so as to facilitate the simultaneous insertion of the three calibration spindles of the calibration device of the present invention into their corresponding roller guide sleeves.

[0019] Limit pins 7 are provided at both ends of the cross bar 4. The limit pins 7 are cotter pins. The limit pins 7 are located on the outside of the first calibration spindle 1 and the outside of the third calibration spindle 3 respectively. After the positioning pins 4 are pulled out, the calibration spindle can be effectively prevented from separating from the cross bar 4.

[0020] The clearance between the calibration spindle 4 and the inner hole of the corresponding roller guide sleeve bushing is 0.04~0.06mm; the clearance between the guide flat key 6 and the keyway of the inner hole of the corresponding roller guide sleeve bushing is 0.03~0.05mm; the clearance between the cross bar 4 and the first calibration spindle transverse hole 12, the second calibration spindle transverse hole 21 and the third calibration spindle transverse hole 31 are all 0.06~0.08mm, which improves the guiding accuracy of the calibration spindle and guide key, as well as the installation accuracy of the cross bar and the calibration spindle.

[0021] The first calibration mandrel 1 , the second calibration mandrel 2 and the third calibration mandrel 3 are all circular tube structures with a central through hole 13 , which reduces the weight of the calibration mandrels and makes the operation more labor-saving and safer.

[0022] The calibration mandrel is made of ZL102 aluminum, which reduces its weight and prevents damage to the inner bore of the roller guide bushing. The guide key 6 is made of Q235A high-quality carbon steel.

[0023] The process of using the utility model to complete the calibration of each roller guide bushing is as follows:

[0024] 1) Vertically connect the crossbar 4 and three parallel calibration spindles equipped with guide keys 6 via locating pins 5. The guide keys 6 on the first calibration spindle 1 and the third calibration spindle 3 face the sides of the second calibration spindle 2, and the guide keys 6 on the second calibration spindle 2 face the guide keys 6 on the third calibration spindle 3. Then, insert stop pins 7 at each end of the crossbar 4 to complete the assembly of the detection device. Simultaneously, mark the longitudinal centerline XX of the three roller guide bushings on the frame mounting surface 101.

[0025] 2) Then, holding the ends of the crossbar 4, align the centerline of the crossbar 5 with the longitudinal centerline XX, and align the lower ends of the three calibration spindles with the upper end faces of their corresponding roller guide bushings. Then, firmly press down on the crossbar 4 so that the lower ends of the guide keys 6 of the three calibration spindles are inserted into the inner keyway 81 of the intake control roller guide bushing, the inner keyway 82 of the fuel control roller guide bushing, and the inner keyway 83 of the exhaust control roller guide bushing. If the guide keys 6 can all be synchronously moved down to the bottom of their respective inner keyways 71 of the roller guide bushings, then holding the ends of the crossbar 4, repeatedly raise and lower the calibration spindles to ensure that the calibration spindles and guide keys 6 can move freely and smoothly up and down in their respective roller guide bushings, then the installation of the three roller guide bushings is qualified. If the guide key 6 cannot move downward synchronously, it means that the orientation of the keyway in the inner hole of the relevant roller guide sleeve bushing needs to be corrected, and then proceed to the following steps to calibrate the orientation of the keyway in the inner hole of the roller guide sleeve bushing;

[0026] 3) First, pull out the locating pins 5 corresponding to the second calibration spindle 2 and cross bar 4, and the third calibration spindle 3 and cross bar 4 respectively, then flip the second calibration spindle 2 and the third calibration spindle 3 upward respectively, and then align the lower end of the first calibration spindle 1 with the upper end face of the intake control roller guide sleeve bushing 8, and insert the lower end of the guide flat key 6 fixed on the first calibration spindle 1 into the inner hole keyway 81 of the intake control roller guide sleeve bushing, and then press down the two ends of the cross bar 4 with force to make the first calibration spindle 1 and the guide flat key 6 move downward until the bottom of the guide flat key 6 moves down to the bottom of the inner hole keyway 81 of the intake control roller guide sleeve bushing; then look down to check whether there is an angle between the axis of the cross bar 4 and the longitudinal center line XX. If so, use a copper rod to knock on the two ends of the cross bar 4 respectively until the center line of the cross bar 4 coincides with the longitudinal center line XX, which indicates that the inner hole keyway 81 of the intake control roller guide sleeve has been rotated to the correct position.

[0027] 4) Following the method in step 3), align the keyway 82 of the fuel control roller guide bushing and the keyway 83 of the exhaust control roller guide bushing. Then, flip the intake control calibration spindle 2 and the exhaust control calibration spindle 3 downward until the three calibration spindles are aligned parallel and facing upward. Insert the locating pin 5 into the upper end of each calibration spindle, and securely connect the three calibration spindles to the crossbar 4.

[0028] 5) Following the method of step 2), the inspection and calibration of the air intake control roller guide sleeve inner keyway 81, the fuel control roller guide sleeve inner keyway 82, and the air intake control roller guide sleeve inner keyway 83 on the frame are finally completed.

[0029] In addition to the above embodiments, the present invention may also have other implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. A medium-speed diesel engine roller guide sleeve installation and verification device, characterized in that: The second check spindle and the third check spindle are respectively used to check the keyway of the inner hole of the intake control roller guide cylinder bushing, the second check spindle and the third check spindle are respectively fixed in the longitudinal keyway corresponding to the first check spindle, the second check spindle and the third check spindle; the cross bar passes through the upper ends of the first check spindle, the second check spindle and the third check spindle at intervals from left to right, and the cross bar is respectively fixedly connected to the first check spindle, the second check spindle and the third check spindle by locating pins passing through the upper ends of the first check spindle, the second check spindle, the third check spindle and the cross bar; the guide flat keys on the first check spindle and the guide flat keys on the third check spindle are respectively facing the two sides of the second check spindle, and the second check spindle is respectively facing the two sides of the second check spindle. The guide flat key on the test spindle faces the guide flat key on the third calibration spindle, and has the same orientation as the intake control roller guide sleeve inner hole keyway, the fuel control roller guide sleeve inner hole keyway and the intake control roller guide sleeve inner hole keyway; the symmetry tolerance between the symmetry center planes MM of the three roller guide sleeve inner hole keyways and the symmetry tolerance between the symmetry center planes MM and the vertical plane NN of the camshaft center are both ≤0.10mm; the center distance h1 between the first calibration spindle and the second calibration spindle is equal to the center distance h2 between the second calibration spindle and the third calibration spindle, and the center distance h1 and the center distance h2 respectively match the center distance H1 of the intake control roller guide sleeve inner hole and the fuel control roller guide sleeve inner hole installed on the frame, and the center distance H2 of the fuel control roller guide sleeve inner hole and the exhaust control roller guide sleeve inner hole.

2. The medium-speed diesel engine roller guide bushing installation and verification device according to claim 1, characterized in that: Limit pins are respectively provided at both ends of the crossbar, and the limit pins are respectively located at the outside of the first calibration spindle and the outside of the third calibration spindle.

3. The medium-speed diesel engine roller guide bushing installation and verification device according to claim 2, characterized in that: The limiting pin is a cotter pin.

4. The medium-speed diesel engine roller guide bushing installation and verification device according to claim 1, characterized in that: The clearance between the calibration spindle and the corresponding roller guide sleeve inner hole is 0.04~0.06mm; the clearance between the guide flat key and the corresponding roller guide sleeve inner hole keyway is 0.03~0.05mm; the clearance between the cross bar and the first calibration spindle transverse hole, the second calibration spindle transverse hole and the third calibration spindle transverse hole are all 0.06~0.08mm; the clearance between the locating pin and the first calibration spindle locating pin hole, the second calibration spindle locating pin hole and the third calibration spindle locating pin hole are all 0.04~0.06mm.

5. The medium-speed diesel engine roller guide bushing installation and verification device according to claim 1, characterized in that: The first calibration mandrel, the second calibration mandrel and the third calibration mandrel are all circular tube structures with a central through hole.

6. The medium-speed diesel engine roller guide bushing installation and verification device according to claim 1, characterized in that: The material of the calibration spindle is aluminum with the grade ZL102, and the material of the guide flat key is high-quality carbon steel with the grade Q235A.

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