Oil injector for dual-fuel engine

Abstract

The utility model belongs to the technical field of engines, particularly relates to an oil injector for a dual-fuel engine, and aims to solve the technical problems that in the prior art, an oil injector is fixed on a cylinder body through a clamping plate during use, but the clamping plate cannot be directly taken down due to limited mounting space in the dismounting process, and the oil injector needs to be prized upwards through a tool, so that the oil injector is inconvenient to use. In order to solve the problems that in the prior art, a cylinder body is prone to being damaged in the prizing process, and disassembly and assembly are very inconvenient, the following scheme is provided, the oil injector comprises an oil device, the outer wall of the oil injector is sleeved with a first sealing ring and a second sealing ring, and the first sealing ring and the second sealing ring are the same in outer diameter and are used for positioning the oil injector; the clamping plate is divided into two parts, so that the clamping plate can be conveniently connected and fixed on the cylinder body, the cylinder body can be prevented from being damaged by a tool during disassembly, the disassembly and assembly efficiency can be improved, the oil injector is more convenient to use, and the sealing performance between the oil injector and the cylinder body can be improved through the first sealing ring and the second sealing ring.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a fuel injector for a dual-fuel engine. Background Art

[0002] With the shortage of oil resources and the increasing environmental pollution, traditional engines that use oil as fuel will face huge challenges. Dual-fuel engines that use oil and natural gas as fuel have a thermal efficiency comparable to that of diesel engines. They not only have low fuel costs, but also effectively reduce pollutant emissions, especially PM, NOx, S0x, etc. The development of micro-injection fuel systems for dual-fuel engines to inject pilot fuel has become an inevitable trend.

[0003] After searching, the present invention with the announcement number CN107514328B relates to a micro-spray electronically controlled fuel injector for a dual-fuel engine, comprising: an upper body section, in which an oil inlet and a first oil channel horizontal mounting hole and a second oil channel are connected thereto are arranged, a guide sleeve is combined with the horizontal mounting hole and is connected to the second oil channel; a lower body section, in which an oil inlet oil channel and a fuel cavity are arranged, and the lower body section is connected to the lower end of the upper body section; a high-speed electromagnetic valve component is connected to the left side of the upper body section; the right section of the control valve core of the high-speed electromagnetic valve component extends into the flat mounting hole of the upper body section and cooperates therewith; a nozzle component is connected to the lower end of the lower body section; a hydraulic amplification component includes an orifice plate, a control sleeve and a control piston, the orifice plate is arranged between the lower end of the lower body section and the upper end of the needle valve body, the control sleeve is arranged in the needle valve body, and the control piston is the upper end part of the needle valve. The present invention can adapt to the installation requirements of limited radial size and loose axial size, and has a small injection amount and high stability.

[0004] The injector also has the following disadvantages during use: the injector is fixed to the cylinder body by a clamping plate during use, but during removal, due to limited installation space, the clamping plate cannot be directly removed and needs to be pried upwards with a tool, and the cylinder body is easily damaged during the prying process, making disassembly and assembly very inconvenient. Utility Model Content

[0005] The utility model aims to solve the problem that in the prior art, the injector is fixed on the cylinder body by a clamping plate during use, but during the removal process, due to limited installation space, the clamping plate cannot be directly removed and needs to be pried upwards by a tool, and the cylinder body is easily damaged during the prying process, making disassembly and assembly very inconvenient. A fuel injector for a dual-fuel engine is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A fuel injector for a dual-fuel engine comprises a fuel injector, wherein the outer wall of the fuel injector is provided with a first sealing ring and a second sealing ring, and the outer diameters of the first sealing ring and the second sealing ring are the same, so as to position the fuel injector;

[0008] The outer wall of the fuel injector is provided with a first positioning groove corresponding to the first sealing ring, which is used to position the first sealing ring;

[0009] The injector is provided with a conical portion, and a second positioning groove corresponding to the second sealing ring is opened at the bottom end of the conical portion for positioning the second sealing ring, and the conical portion can drive the second sealing ring to expand outwards and abut against the inner wall of the cylinder during installation;

[0010] A clamping plate is arranged on the fuel injector and is used for fixing the fuel injector on the cylinder body.

[0011] In a possible design, the clamping plate includes a clamping ring and a connecting block, the clamping ring is clamped on the outside of the injector, the connecting block is plugged into the clamping ring, and a through hole is opened on the top of the connecting block for bolts to pass through and connect to the cylinder body.

[0012] In a possible design, a retaining groove is provided on the outer side of the fuel injector, and the retaining ring is retained in the retaining groove.

[0013] In a possible design, an extension block is fixedly provided on one side of the retaining ring, arc-shaped portions corresponding to the valve springs are provided on both sides of the extension block, a plurality of insertion holes are provided on one side of the extension block, insertion strips are inserted into the insertion holes, and the plurality of insertion strips are fixedly provided on one side of the connecting block for guiding the insertion between the extension block and the connecting block.

[0014] In a possible design, a mounting hole corresponding to the insertion hole is provided in the extension block, a pin is slidably provided in the mounting hole, an outer wall fixing sleeve of the pin is provided with a limiting ring located in the mounting hole, an outer wall sleeve of the pin is provided with a spring located in the mounting hole, two ends of the spring are respectively fixedly connected to the top of the limiting ring and the top wall of the mounting hole, and one end of the insertion strip is provided with a beveled edge used in conjunction with the pin.

[0015] In a possible design, a trigger hole is provided on the top of the connecting block for triggering the connecting block to move.

[0016] In the present application, during installation, the first sealing ring and the second sealing ring are firstly put on the injector and positioned in the corresponding first positioning groove and the second positioning groove, and then the clamping ring is placed in the clamping groove, and the clamping groove is placed in the cylinder installation position, and pressed downward. During the pressing process, the outer wall of the second sealing ring contacts the cylinder, and the second sealing ring can be driven to expand outward through the tapered portion, so that it fits tightly with the inner wall of the cylinder;

[0017] Then place the connecting block on the cylinder body and push the connecting block to move, which can drive the insertion strip to be inserted into the corresponding socket. At the same time, the pin can be driven upward through the beveled edge to make the pin protruding at the top of the extension block, so as to provide a positioning prompt. At the same time, the through hole corresponds to the mounting hole on the cylinder body. Finally, the connecting block is fixed to the cylinder body by bolts.

[0018] Beneficial effects:

[0019] In the utility model, the fuel injector for the dual-fuel engine is sleeved with a first sealing ring and a second sealing ring, so that the fuel injector will not shake in the cylinder body during installation, and the sealing between the fuel injector and the cylinder body can be improved, making it safer to use;

[0020] In the utility model, the fuel injector for the dual-fuel engine can be easily disassembled and assembled by splitting the clamping plate into a clamping ring and a connecting block, without the need to pry the connecting block upwards with a tool, thereby avoiding damage to the cylinder body and improving the disassembly and assembly efficiency;

[0021] In the utility model, the clamping plate is split into two parts, so that it is convenient to connect and fix it on the cylinder body, and it can avoid that the tool causes damage to the cylinder body during removal, and at the same time, the disassembly and assembly efficiency can be improved, and it is more convenient to use. At the same time, the sealing between the injector and the cylinder body can be improved by the first sealing ring and the second sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional structural schematic diagram of a fuel injector for a dual-fuel engine proposed by the utility model;

[0023] Figure 2 A schematic diagram of the local structure of the fuel injector for a dual-fuel engine proposed by the utility model;

[0024] Figure 3 This is a schematic diagram of the exploded structure of the card plate of the fuel injector for a dual-fuel engine proposed by the utility model;

[0025] Figure 4 The utility model is a schematic cross-sectional structure diagram of a clamping plate for a fuel injector of a dual-fuel engine.

[0026] In the figure: 1. injector; 2. first sealing ring; 3. second sealing ring; 4. clamping plate; 5. first positioning groove; 6. conical portion; 7. second positioning groove; 8. clamping groove; 9. clamping ring; 10. extension block; 11. arc portion; 12. plug hole; 13. connecting block; 14. through hole; 15. insert strip; 16. trigger hole; 17. bevel edge; 18. mounting hole; 19. pin; 20. spring; 21. limit ring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Example 1

[0029] Reference Figure 1-Figure 4 The fuel injector comprises: a fuel injector 1, wherein the outer wall of the fuel injector 1 is provided with a first sealing ring 2 and a second sealing ring 3, and the outer diameters of the first sealing ring 2 and the second sealing ring 3 are the same, so as to position the fuel injector 1;

[0030] The outer wall of the fuel injector 1 is provided with a first positioning groove 5 corresponding to the first sealing ring 2, for positioning the first sealing ring 2;

[0031] The fuel injector 1 is provided with a conical portion 6, and a second positioning groove 7 corresponding to the second sealing ring 3 is formed at the bottom end of the conical portion 6, which is used to position the second sealing ring 3, and during the installation process, the conical portion 6 can drive the second sealing ring 3 to expand outward and abut against the inner wall of the cylinder body;

[0032] The card plate 4 is arranged on the fuel injector 1 and is used to fix the fuel injector 1 on the cylinder body. The first sealing ring 2 and the second sealing ring 3 are arranged on the outer wall of the fuel injector 1 so that the fuel injector 1 can be positioned in the cylinder body during installation, and no tilting will occur during installation. At the same time, the second sealing ring 3 can be driven to expand outward through the tapered portion 6, so that the sealing between the fuel injector 1 and the cylinder body can be improved. The fuel injector 1 is fixed to the cylinder body through the card plate 4, so that it is easy to disassemble and assemble. The fuel injector 1 adopts the fuel injector in the patent document CN107514328B.

[0033] The clamping plate 4 includes a clamping ring 9 and a connecting block 13. The clamping ring 9 is clamped on the outer side of the injector 1, and the connecting block 13 is inserted on the clamping ring 9. A through hole 14 is opened on the top of the connecting block 13 for bolts to pass through and connect with the cylinder body. By splitting the clamping plate 4 into the clamping ring 9 and the connecting block 13, it is possible to remove the clamping ring 9 without prying it with tools during the disassembly process. The connecting block 13 only needs to be pulled out from one side of the clamping ring 9, which can increase the space in the cylinder body, facilitate the removal of the clamping ring 9 and the injector 1 from the cylinder, and is more convenient to use.

[0034] An extension block 10 is fixedly provided on one side of the retaining ring 9, and arc-shaped portions 11 corresponding to the valve springs are provided on both sides of the extension block 10. A plurality of insertion holes 12 are provided on one side of the extension block 10, and insertion strips 15 are inserted into the insertion holes 12. The plurality of insertion strips 15 are fixedly provided on one side of the connecting block 13, and are used for guiding the insertion of the extension block 10 and the connecting block 13. By inserting the insertion strips 15 and the insertion holes 12, the connecting block 13 and the extension block 10 can be connected together, and can be guided during the insertion process, and can be misaligned with the valve spring.

[0035] A mounting hole 18 corresponding to the insertion hole 12 is provided in the extension block 10, a pin 19 is slidably provided in the mounting hole 18, the outer wall of the pin 19 is fixedly sleeved with a limit ring 21 located in the mounting hole 18, the outer wall of the pin 19 is sleeved with a spring 20 located in the mounting hole 18, the two ends of the spring 20 are respectively fixedly connected to the top of the limit ring 21 and the top wall of the mounting hole 18, and one end of the insertion strip 15 is provided with a bevel 17 used in conjunction with the pin 19. During the insertion of the insertion strip 15 into the insertion hole 12, the bevel 17 will drive the pin 19 to move upward, so that the top end of the pin 19 protrudes from the extension block 10, so that it can be positioned for insertion, and at the same time, the through hole 14 can be positioned with the mounting hole 18 on the cylinder body.

[0036] A clamping groove 8 is provided on the outer side of the fuel injector 1, and a clamping ring 9 is clamped in the clamping groove 8. By clamping the clamping ring 9 in the clamping groove 8, the fuel injector 1 can be continuously fixed by the clamping ring 9 during the process of fixing the connecting block 13, and the disassembly is convenient.

[0037] The present application can be used in dual-fuel engines, and can also be used in other fields applicable to the present application.

[0038] Example 2

[0039] refer to Figure 1-Figure 4 , improved on the basis of Example 1: an injector for a dual-fuel engine, which is used in the field of engines, a trigger hole 16 is provided on the top of the connecting block 13, which is used to trigger the connecting block 13 to move. By providing the trigger hole 16 on the top of the connecting block 13, it is convenient to push the connecting block 13 to move by a tool, so that the insert 15 is inserted into the plug hole 12.

[0040] However, as is well known to those skilled in the art, the working principle and wiring method of the injector 1 are commonplace, and are conventional means or common knowledge, and will not be described in detail here. Those skilled in the art may make any selections according to their needs or convenience.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fuel injector for a dual-fuel engine, comprising a fuel injector (1), characterized in that: The outer wall of the fuel injector (1) is provided with a first sealing ring (2) and a second sealing ring (3), and the outer diameters of the first sealing ring (2) and the second sealing ring (3) are the same, so as to position the fuel injector (1); The outer wall of the fuel injector (1) is provided with a first positioning groove (5) corresponding to the first sealing ring (2) and used for positioning the first sealing ring (2); The fuel injector (1) is provided with a conical portion (6), and a second positioning groove (7) corresponding to the second sealing ring (3) is formed at the bottom end of the conical portion (6) for positioning the second sealing ring (3), and during the installation process, the conical portion (6) can drive the second sealing ring (3) to expand outwards and abut against the inner wall of the cylinder body; A clamping plate (4) is arranged on the fuel injector (1) and is used to fix the fuel injector (1) on the cylinder body.

2. The fuel injector for a dual-fuel engine according to claim 1, characterized in that: The clamping plate (4) comprises a clamping ring (9) and a connecting block (13); the clamping ring (9) is clamped on the outer side of the injector (1); the connecting block (13) is plugged into the clamping ring (9); a through hole (14) is provided on the top of the connecting block (13) for passing a bolt through the top of the connecting block (13) to connect with the cylinder body.

3. The fuel injector for a dual-fuel engine according to claim 2, characterized in that: The outer side of the fuel injector (1) is provided with a clamping groove (8), and the clamping ring (9) is clamped in the clamping groove (8).

4. The fuel injector for a dual-fuel engine according to claim 3, characterized in that: An extension block (10) is fixedly provided on one side of the clamping ring (9), arc-shaped portions (11) corresponding to the valve spring are provided on both sides of the extension block (10), a plurality of insertion holes (12) are provided on one side of the extension block (10), insertion strips (15) are inserted into the insertion holes (12), and the plurality of insertion strips (15) are fixedly provided on one side of the connecting block (13) and are used for guiding the insertion of the extension block (10) and the connecting block (13).

5. The fuel injector for a dual-fuel engine according to claim 4, characterized in that: The extension block (10) is provided with a mounting hole (18) corresponding to the insertion hole (12), a pin (19) is slidably provided in the mounting hole (18), an outer wall of the pin (19) is fixedly sleeved with a limit ring (21) located in the mounting hole (18), an outer wall of the pin (19) is sleeved with a spring (20) located in the mounting hole (18), two ends of the spring (20) are respectively fixedly connected to the top of the limit ring (21) and the top wall of the mounting hole (18), and one end of the insertion strip (15) is provided with a bevel (17) used in conjunction with the pin (19).

6. The fuel injector for a dual-fuel engine according to any one of claims 2 to 5, characterized in that: The top of the connecting block (13) is provided with a trigger hole (16) for triggering the connecting block (13) to move.

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