Testing device for adjusting injection angle of marine engine injector

Abstract

The utility model discloses a marine engine ejector injection angle adjusting test device, which comprises an expansion sleeve, a swing inner sleeve, an adjusting seat, a rotary supporting seat, a corrugated sealing sleeve, two pressing covers and two thrust bushings, an ejector and the expansion sleeve are inserted into the swing inner sleeve, the pressing covers are respectively fixed in the upper end and the lower end of the swing inner sleeve, and the thrust bushings are fixed on the adjusting seat. The thrust bushings are embedded and fixed into transverse grooves of the adjusting base respectively, the top of the adjusting base is fixed to a flange on the top of the rotary supporting base through a Z-axis swinging mechanism, and the bottom of the rotary supporting base is fixed into one side of the air cylinder cover. The lower end of the ejector faces an air inlet channel of the air cylinder cover, and the corrugated sealing sleeve completely seals the bottom of the rotary supporting seat. The device is very convenient to assemble, disassemble and adjust, the test cost of the ejector is remarkably reduced, and the test time is shortened.

Description

Technical Field

[0001] The utility model relates to an injector of a marine engine, in particular to a device which can adjust the spatial angle of fuel injection of the injector during the injector test, and belongs to the technical field of marine engines. Background Art

[0002] Under the increasingly stringent international shipping emission regulations of the International Maritime Organization, more and more ships have abandoned the use of marine diesel engines that fail to meet emission standards, and green fuels such as natural gas, methanol, and ammonia are increasingly being used in marine engines. The more mature technical solution at this stage is to modify the fuel system to use low-carbon green fuels while keeping the original diesel engine structure unchanged. For single green fuel or dual-fuel engines, the intake port injection of low-carbon fuels is usually adopted. The green fuel injection position is closely related to the atomization and combustion process of the marine engine mixture, which greatly affects the performance and emission level of the marine engine. The injection position of the injector in the intake port is an important parameter in engine design. At present, the simulation calculation method is mainly used to determine the injection angle and position of the injector in the intake port of the marine engine. The time period of this method is relatively long. The injector is installed on the cylinder head according to the designed position and angle. The angle of the injector axis cannot be adjusted, and it is difficult to replace the injector. Utility Model Content

[0003] The utility model aims to provide a test device for adjusting the injection angle of a marine engine injector, which realizes that the injection angle of the injector in the marine engine intake passage is omnidirectionally variable and the injection position is axially adjustable.

[0004] The utility model is realized through the following technical solutions:

[0005] A test device for adjusting the injection angle of a marine engine injector comprises an expansion sleeve, a swinging inner sleeve, an adjustment seat, a rotating support seat, a corrugated sealing sleeve, two clamping covers, two thrust bushings and two nuts. The inner hole of the expansion sleeve is fixed on the injector, and the injector and the expansion sleeve are inserted into the swinging inner sleeve; the clamping covers are respectively fixed in the upper and lower ends of the swinging inner sleeve through threaded connection, and the inner frustum holes of the clamping covers are respectively clamped on the two ends of the expansion sleeve, so that the injector together with the expansion sleeve is fixed in the swinging inner sleeve; horizontal supporting stepped shafts are respectively extended from the middle of the radial sides of the swinging inner sleeve, and the thrust bushings are respectively sleeved on the inner ends of the horizontal supporting stepped shafts; a vertical hole is provided in the center of the top flange of the adjusting seat, and transverse grooves are respectively provided on both sides of the center of the vertical hole, the middle of the swinging inner sleeve is located in the vertical hole, and the inner ends of the horizontal supporting stepped shafts at both ends of the swinging inner sleeve are respectively provided. The thrust bushings on are respectively embedded and fixed in the transverse grooves, and the nuts are respectively tightened and fixed on the end heads of the horizontal support stepped shafts, so that the injector axis is rotated around the X-axis and positioned at the required angle; the top flange of the adjusting seat is fixed to the top flange of the rotating support seat by a rotating mechanism around the Z-axis, and the bottom flange of the rotating support seat is fixed in the upper hole of the stepped hole on one side of the cylinder head; the lower end of the injector extends into the lower through hole of the stepped hole and faces the intake duct of the cylinder head; the center hole of the bellows sealing sleeve is sleeved on the lower part of the outer circle of the injector, and the upper side of the bellows sealing sleeve is against the middle step of the injector through a retaining ring, so that the upper part of the bellows sealing sleeve seals the lower outer circle of the injector, and the outer edge of the bottom of the bellows sealing sleeve is clamped and fixed between the bottom of the rotating support seat and the upper hole, so that the bellows sealing sleeve completely closes the bottom of the rotating support seat.

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

[0007] Furthermore, the expansion sleeve is a combination of a hollow cone body at both ends and a torus body in the middle, and a plurality of axial elastic grooves are evenly distributed at both ends of the combination, and the axial elastic grooves at both ends of the combination are staggered. The ratio of the axial elastic groove length L1 to the expansion sleeve length L2 is: L1 / L2=0.84-0.88.

[0008] Furthermore, the Z-axis rotation mechanism includes 4 top arc grooves and 4 sets of bolts and nuts, the top arc grooves are evenly distributed on the top flange of the adjustment seat, the central arc line of the top arc groove is centered on the axis of the adjustment seat, the bolts pass vertically through the top arc groove and the through hole of the top flange of the rotating support seat respectively, and after screwing on the second nut, the injector axis is positioned at the required spatial angle of rotation around the Z axis.

[0009] Furthermore, a "△" top arc groove rotation angle mark is provided on the outer side of the center of a top arc groove, and a ±30° top arc scale is provided on the top flange of the rotating support seat outside the "△" top arc groove rotation angle mark; in the initial state, the "△" top arc groove rotation angle mark is aligned with the "0" position of the top arc scale; the angle range of rotation of the injector axis around the Z axis is ±30°.

[0010] Furthermore, arc-shaped observation windows are respectively provided at the lower parts of both sides of the adjustment seat, and the central arc line of the arc-shaped observation window is centered on the axis of the horizontal supporting step shaft. The lower sides of the arc-shaped observation windows are respectively provided with ±60° side arc-shaped scales, and the swinging inner sleeve in the arc-shaped observation window is provided with a "△" swinging inner sleeve rotation mark; in the initial state, the "△" swinging inner sleeve rotation mark is aligned with the "0" position of the side arc scale; the angular range of rotation of the injector axis around the X-axis is ±60°.

[0011] Furthermore, an O-ring is used to seal between the bottom flange of the rotary support seat and the bottom surface of the upper hole of the stepped hole.

[0012] The utility model can realize the rotation of the injector axis around the X axis and the Z axis respectively, and can accurately measure the rotation angle with a resolution of 1°, so that the spatial angle of the injector axis required for the test can be obtained conveniently and quickly. The utility model can also realize the axial movement of the injector on the cylinder head to meet the test needs of different types of injectors. The utility model is very convenient to assemble, disassemble and adjust, which significantly reduces the cost of injector testing and shortens the test time. It provides a reliable guarantee for optimizing the injector test of marine engines and obtaining accurate and intuitive test parameters.

[0013] Advantages and features of the present invention will be illustrated and explained by 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 It is a cross-sectional view of the utility model;

[0015] Figure 2 yes Figure 1 A-direction view;

[0016] Figure 3 yes Figure 1 B-direction view;

[0017] Figure 4 This is an enlarged view of the expansion sleeve. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1 to Figure 4As shown, the marine engine injector injection angle adjustment test device of this embodiment includes an expansion sleeve 1, a swinging inner sleeve 2, an adjustment seat 3, a rotating support seat 4, a corrugated sealing sleeve 5, two clamping covers 6, two thrust bushings 7 and two nuts 8.

[0020] like Figure 4 As shown, the expansion sleeve 1 is a combination of a hollow cone body 11 at both ends and a ring body 12 in the middle. A circle of several axial elastic grooves 13 are evenly distributed at both ends of the combination. The axial elastic grooves 13 at both ends of the combination are staggered. The ratio of the axial elastic groove length L1 to the expansion sleeve length L2 is: L1 / L2=0.86. Such a structure enables the expansion sleeve 1 and the pressing cover 6 to be tightly fixed on the injector 100 when the conical surfaces abut against each other, and the injector 100 can be easily removed after the conical surfaces are out of contact. The injector 100 and the expansion sleeve 1 are inserted into the swing inner sleeve 2, and the pressing cover 6 is respectively fixed in the upper and lower ends of the swing inner sleeve 2 through threaded connection. The inner cone holes of the pressing cover 2 are respectively pressed on the hollow cone bodies 11 at both ends of the expansion sleeve 1, thereby fixing the injector 100 and the expansion sleeve 1 in the swing inner sleeve 2. Horizontal support stepped shafts 21 are respectively extended from the middle of the two radial sides of the swing inner sleeve 2, and the thrust bushings 7 are respectively sleeved on the inner ends of the horizontal support stepped shafts 21.

[0021] like Figure 2 As shown, a vertical hole 311 is provided in the center of the top flange 31 of the adjustment seat, and transverse grooves 312 are provided on both sides of the center of the vertical hole 311. The thrust bushings 7 are respectively embedded and fixed in the transverse grooves 312, and the nuts 8 are respectively tightened and fixed on the ends of the horizontal supporting stepped shafts 21, so that the axis of the injector 100 is rotated around the X-axis and positioned at the desired angle.

[0022] like Figure 2 As shown, the top flange 31 of the adjustment seat is fixed on the top flange 41 of the rotating support seat by the rotating mechanism 32 around the Z axis, and the bottom flange 42 of the rotating support seat is fixed in the upper hole 911 of the stepped hole 91 on one side of the cylinder head 9 by 6 fastening screws 43. The lower end of the injector 100 extends into the lower through hole 912 of the stepped hole 91 and faces the intake duct 92 of the cylinder head 9. The central hole 51 of the bellows seal sleeve is sleeved on the lower part of the outer circle of the injector 100, and the upper side of the bellows seal sleeve 5 is against the middle step 101 of the injector 100 through the retaining ring 52, so that the upper part of the bellows seal sleeve 5 seals the lower outer circle of the injector 100, and the outer edge of the bottom of the bellows seal sleeve 5 is clamped and fixed between the bottom of the rotating support seat 4 and the upper hole 911, so that the bellows seal sleeve 5 completely closes the bottom of the rotating support seat 4. The bottom flange 42 of the rotary support seat and the bottom surface of the upper hole 911 of the cylinder head 9 are sealed by an O-ring 93. The purpose of these two measures is to prevent the gasified fuel from escaping from the cylinder head 9 and ensure the safety of the marine engine.

[0023] like Figure 1 and Figure 2 and Figure 1 As shown in the three-dimensional coordinate system, the Z-axis rotation mechanism 32 includes 4 top arc grooves 321 and 4 sets of bolts and nuts. The top arc grooves 321 are evenly distributed on the top flange 31 of the adjustment seat. The central arc line of the top arc groove 321 is centered on the axis of the adjustment seat 3. The bolts 322 respectively pass vertically through the top arc groove 321 and the top flange through hole 411 of the rotating support seat. After the second nut 81 is screwed on, the axis of the injector 100 is positioned at the required spatial angle of rotation around the Z axis.

[0024] like Figure 2 As shown, a "△" top arc groove rotation angle mark 323 is provided at the outer side of the center of a top arc groove 321, and a ±30° top arc scale 44 is provided on the top flange 41 of the rotating support seat outside the "△" top arc groove rotation angle mark 323. In the initial state, the "△" top arc groove rotation angle mark 323 is aligned with the "0" position of the top arc scale 44, and the rotation angle range of the axis of the injector 100 around the Z axis is ±30°.

[0025] like Figure 3 As shown, arc-shaped observation windows 33 are respectively provided at the lower part of both sides of the adjustment seat 3, and the central arc of the arc-shaped observation window 33 is centered on the axis of the horizontal support ladder shaft 21. The lower side of the arc-shaped observation window 33 is respectively provided with a ±60° side arc-shaped scale 34, and a "△" swing inner sleeve rotation mark 22 is provided on the swing inner sleeve 2 in the arc-shaped observation window 34. In the initial state, the "△" swing inner sleeve rotation mark 22 is aligned with the "0" position of the side arc-shaped scale 34; the angular range of the axis of the injector 100 rotating around the X axis is ±60°.

[0026] The process of using the utility model to adjust the injection angle adjustment test device for the marine engine injector is as follows:

[0027] 1) First, put the expansion sleeve 1 on the injector 100, and move the expansion sleeve 1 to the set axial position of the injector 100, then insert the injector 100 and the expansion sleeve 1 into the swing inner sleeve 2, and then tighten the clamping cover 6 to the upper and lower ends of the swing inner sleeve 2, so that the inner frustum hole of the clamping cover 6 is respectively pressed on the frustum surface of the two ends of the expansion sleeve 1, thereby fixing the injector 100 and the expansion sleeve 1 in the swing inner sleeve 2, and utilizing the normal force generated by the cone surface extrusion, which is much greater than the axial force, so that the injector 100, the expansion sleeve 1 and the swing inner sleeve 2 are fixedly connected as a whole, thereby completing the adjustment of the axial position of the injector 100 in the adjustment seat 2.

[0028] 2) Put the thrust bushing 7 on the inner ends of the horizontal support stepped shaft 21 in the middle of the radial sides of the swing inner sleeve 2, and then embed the thrust bushing 7 in the transverse groove 312 of the adjustment seat 3, and then put the washer 71 on the outer end of the horizontal support stepped shaft 21 and then screw on the nut 8. According to the test angle requirements of the axis of the injector 100 rotating around the X-axis, the swing inner sleeve 2 is rotated around the axis of the horizontal support stepped shaft 21 on both sides until the top arc groove rotation mark 22 of the "△" on the swing inner sleeve 2 in the arc observation window 33 is aligned with the "0" position of the top arc scale 34, completing the initial setting of the rotation angle of the axis of the injector 100 around the X-axis. Next, the swing inner sleeve 2 is rotated around the axis of the horizontal supporting stepped shaft 21 on both sides thereof, so that the rotation mark 22 of the top arc groove of "△" is aligned with the required adjustment angle of the side arc scale 34 on the lower side of the arc observation window 33, and then the nuts 8 on the outer ends of the horizontal supporting stepped shaft 21 are tightened respectively, so as to fix the axis of the injector 100 at the required rotation angle around the X-axis, thereby completing the angle adjustment of the injector axis around the X-axis.

[0029] 3) Install the assembled adjustment seat 3 into the rotating support seat 4 so that the top flange 31 of the adjustment seat is supported on the top flange 41 of the rotating support seat; then rotate the adjustment seat 3 around its axis so that the "△" top arc groove rotation angle mark 22 of the top flange 31 of the adjustment seat is aligned with the "0" position of the top arc scale 34 of the top flange 41 of the rotating support seat, completing the initial setting of the axis of the injector 100 rotating around the Z axis. Then, pass the bolt 322 through the top arc groove 321 and the top flange through hole 411 of the rotating support seat respectively, and then screw on the second nut 81, and then rotate the adjustment seat 3 until the "△" top arc groove rotation angle mark 323 is aligned with the required angle position of the top arc scale 44, and finally tighten the second nut 81, so as to fix the axis of the injector 100 at the required swing angle around the Z axis, completing the adjustment of the rotation angle of the axis of the injector 100 around the X axis.

[0030] 4) First, insert the O-ring 10 into the sealing ring groove of the bottom flange 42 of the rotating support seat, then put the corrugated sealing sleeve 5 on the lower part of the injector 100, and then insert the bottom flange 42 of the rotating support seat into the upper hole 911 of the stepped through hole 91 on one side of the cylinder head 9, so that the center hole 51 of the corrugated sealing sleeve seals the lower outer circle of the injector 100, and clamp the bottom outer edge of the corrugated sealing sleeve 5 between the bottom flange 42 of the rotating support seat and the bottom surface of the upper hole 911 of the stepped through hole 91, and finally fix the bottom flange 42 of the rotating support seat in the upper hole 911 of the stepped through hole 91 of the cylinder head 9 by 6 fixing screws 43, and complete the preparation work before the injector test.

[0031] In addition to the above-mentioned 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 test device for adjusting the injection angle of a marine engine injector, characterized in that: It includes an expansion sleeve, a swinging inner sleeve, an adjusting seat, a rotating support seat, a corrugated sealing sleeve, 2 clamping covers, 2 thrust bushings and 2 nuts. The inner hole of the expansion sleeve is fixed on the injector, and the injector is inserted into the swinging inner sleeve together with the expansion sleeve; the clamping covers are respectively fixed in the upper and lower ends of the swinging inner sleeve through threaded connection, and the inner frustum holes of the clamping cover are respectively clamped on the two ends of the expansion sleeve, thereby fixing the injector and the expansion sleeve in the swinging inner sleeve; horizontal supporting stepped shafts are respectively extended from the middle of the radial sides of the swinging inner sleeve, and the thrust bushings are respectively sleeved on the inner ends of the horizontal supporting stepped shafts; a vertical hole is provided in the center of the top flange of the adjusting seat, and transverse grooves are respectively provided on both sides of the center of the vertical hole. The middle part of the swinging inner sleeve is located in the vertical hole, and the thrust bushings on the inner ends of the horizontal supporting stepped shafts at both ends of the swinging inner sleeve are respectively embedded in the fixed The nuts are fixed in the transverse groove, and are tightened and fixed on the end heads of the horizontal support stepped shafts, so that the injector axis is rotated around the X-axis and positioned at the desired angle; the top flange of the adjusting seat is fixed to the top flange of the rotating support seat by a rotating mechanism around the Z-axis, and the bottom flange of the rotating support seat is fixed in the upper hole of the stepped hole on one side of the cylinder head; the lower end of the injector extends into the lower through hole of the stepped hole and faces the intake duct of the cylinder head; the center hole of the bellows sealing sleeve is sleeved on the lower part of the outer circle of the injector, and the upper side of the bellows sealing sleeve is abutted against the middle step of the injector through a retaining ring, so that the upper part of the bellows sealing sleeve seals the lower outer circle of the injector, and the outer edge of the bottom of the bellows sealing sleeve is clamped and fixed between the bottom of the rotating support seat and the upper hole, so that the bellows sealing sleeve completely closes the bottom of the rotating support seat.

2. The marine engine injector injection angle adjustment test device according to claim 1, characterized in that: The expansion sleeve is a combination of a hollow frustum body at both ends and a circular ring body in the middle. A plurality of axial elastic grooves are evenly distributed at both ends of the combination, and the axial elastic grooves at both ends of the combination are staggered.

3. The marine engine injector injection angle adjustment test device according to claim 2, characterized in that: The ratio of the axial elastic groove length L1 to the expansion sleeve length L2 is: L1 / L2=0.84~0.

88.

4. The marine engine injector injection angle adjustment test device according to claim 1, characterized in that: The Z-axis rotation mechanism includes 4 top arc grooves and 4 sets of bolts and nuts. The top arc grooves are evenly distributed on the top flange of the adjustment seat. The central arc line of the top arc groove is centered on the axis of the adjustment seat. The bolts pass vertically through the top arc groove and the through hole of the top flange of the rotating support seat respectively. After screwing on the second nut, the axis of the injector is positioned at the required spatial angle of rotation around the Z axis.

5. The marine engine injector injection angle adjustment test device according to claim 4, characterized in that: A "△" top arc groove rotation angle mark is provided on the outer side of the center of a top arc groove, and a ±30° top arc scale is provided on the top flange of the rotating support seat outside the "△" top arc groove rotation angle mark; in the initial state, the "△" top arc groove rotation angle mark is aligned with the "0" position of the top arc scale; the rotation angle range of the injector axis around the Z axis is ±30°.

6. The marine engine injector injection angle adjustment test device according to claim 1, characterized in that: Arc-shaped observation windows are respectively provided at the lower part of both sides of the adjustment seat, and the central arc of the arc-shaped observation window is centered on the axis of the horizontal supporting stepped shaft. The lower side of the arc-shaped observation window is respectively provided with a ±60° side arc-shaped scale, and the swinging inner sleeve in the arc-shaped observation window is provided with a "△" swinging inner sleeve rotation mark; in the initial state, the "△" swinging inner sleeve rotation mark is aligned with the "0" position of the side arc-shaped scale; the angular range of rotation of the injector axis around the X-axis is ±60°.

7. The marine engine injector injection angle adjustment test device according to claim 1, characterized in that: An O-shaped sealing ring is used to seal between the bottom flange of the rotary support seat and the bottom surface of the upper hole of the stepped hole.

Images