Grinding tool for mounting seat hole of oil injector of marine diesel engine

Abstract

The utility model relates to the technical field of diesel engine fuel injector mounting seat hole grinding tools, and discloses a marine diesel engine fuel injector mounting seat hole grinding tool which comprises a guide sleeve, an inner hole is formed in the top of the guide sleeve, a cutter support is inserted into the guide sleeve, and hexagon bolts are connected to the two ends of the top of the guide sleeve. A forming tool is connected to the bottom of the tool support, set screws are connected to the two ends of the exterior of the tool support, the tool support is sleeved with a limiting mechanism, the limiting mechanism comprises a first hollow column and a second hollow column, and a piston rod is slidably connected to the interior of the first hollow column. According to the marine diesel engine fuel injector mounting seat hole grinding tool, when deposited carbon is ground, the deposited carbon is prevented from splashing outside the tool support, the forming tool and the set screw, so that the deposited carbon is prevented from influencing normal disassembly of the tool support and the forming tool, and meanwhile, the connection strength between the tool support and the forming tool can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel engine fuel injector mounting seat hole grinding tools, in particular to a marine diesel engine fuel injector mounting seat hole grinding tool. Background Art

[0002] The space formed by the piston top surface, cylinder liner inner surface and cylinder head bottom surface in the main components of a marine diesel engine is called a combustion chamber. Due to the high temperature and high pressure combustion gas, the combustion chamber components are subjected to pulsating mechanical stress, thermal stress, corrosion and ablation. As one of the core components of the combustion chamber, the cylinder head is equipped with various valves such as injectors, cylinder start valves, indicator valves, exhaust valves, safety valves, etc.; among them, the injector is an important component in the fuel system of a marine diesel engine, and contains precision needle valve pairs, nozzles, etc. Its working state directly affects the quality of fuel atomization, and determines the key indicators such as the sufficiency of combustion and the thermal efficiency of the whole machine;

[0003] The two fuel injectors of a marine diesel engine are installed on both sides of the exhaust valve on the cylinder head. The sprayed oil beam is not evenly distributed in the cylinder and is easily sprayed onto the piston top and the bottom of the cylinder head. During long-term operation, carbon deposits are easily formed, which block the installation seat hole of the fuel injector, affecting the normal operation of the fuel injector and further affecting the daily operation of the main engine, which is crucial to the safe navigation of the ship.

[0004] When the existing device cleans the inside of the injector, the injector needs to be disassembled, and then the mounting seat hole of the injector needs to be ground and cleaned through an eye mask device. However, when the traditional grinding device cleans the mounting seat hole, it may not meet the tolerance technical requirements of the drawing, especially in terms of angle and depth. It cannot accurately guarantee, and then the carbon deposits inside the mounting seat hole cannot be completely cleaned, and it may affect the normal use of the injector. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a marine diesel engine injector mounting seat hole grinding tool to solve the above technical problems.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a marine diesel engine injector mounting seat hole grinding tool, comprising: a guide sleeve, and an inner hole is opened at the top of the guide sleeve, a tool holder is inserted inside the guide sleeve, the top two ends of the guide sleeve are connected with hexagonal bolts, the bottom of the tool holder is connected with a forming tool, the outer two ends of the tool holder are connected with set screws, and the outer sleeve of the tool holder is sleeved with a limiting mechanism.

[0009] Preferably, the limiting mechanism includes a first hollow column and a second hollow column, which are respectively sleeved on the two ends of the outside of the tool holder, a piston rod is slidably connected to the inside of the first hollow column, a piston group is slidably connected to the inside of the second hollow column, and an annular sleeve is connected to the bottom of the piston group. The movement of the piston rod inside the first hollow column will generate airflow, which will enter the interior of the second hollow column through the curved pipe, and then push the piston group and the annular sleeve to protect the forming tool and the tool holder.

[0010] Preferably, the piston group and the top of the piston rod are both connected with springs, and the springs are respectively connected to the second hollow column and the first hollow column. When the tool holder is disassembled, the springs cause the limiting mechanism to return as a whole.

[0011] Preferably, a groove is provided at the bottom of the tool holder, and the forming tool is inserted into the groove, so that the groove facilitates the connection between the forming tool and the tool holder.

[0012] Preferably, the set screw passes through the interior of the groove, and is threadedly connected to the forming tool, so that the set screw can fix the forming tool and the tool holder.

[0013] Preferably, a knurled groove is provided on the outside of the tool holder, and a hexagonal block is fixedly connected to the top of the tool holder. The knurled groove facilitates installation, positioning and disassembly of the tool holder, and the hexagonal block facilitates the operator to perform repair and grinding operations on the bottom injector seat hole.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a marine diesel engine injector mounting seat hole grinding tool, which has the following beneficial effects:

[0016] The marine diesel engine injector mounting hole grinding tool solves the positioning problem of key dimensions and angles of the injector mounting hole during the repair and grinding process. The positioning accuracy is high and the loading and unloading is simple and fast, which overcomes the disadvantages of large positioning errors in general and greatly improves the production efficiency of repair and renovation. At the same time, it ensures that the assembly positioning of the injector, one of the important parts of the diesel engine, meets the design requirements, ensures the normal operation of the diesel engine and the safe and normal navigation of the ship. The positioning method based on the inner hole is adopted, which has a relatively large promotion value in the high-precision positioning, repair and grinding of parts based on the inner hole. At the same time, through the added limiting mechanism, when the tool holder is assembled, the connection between the forming tool and the tool holder and the set screw are automatically protected to avoid carbon deposits splashing on the outside of the tool holder, the forming tool and the set screw when grinding the carbon deposits, thereby avoiding carbon deposits affecting the normal disassembly of the tool holder and the forming tool, and at the same time, the connection strength between the tool holder and the forming tool can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front schematic diagram of the utility model;

[0018] Figure 2 This is a front view schematic diagram of the limiting mechanism of the utility model;

[0019] Figure 3 This is a front cross-sectional view of the limiting mechanism of the utility model;

[0020] Figure 4 It is a schematic diagram of the working state of the utility model.

[0021] In the figure: 1, guide sleeve; 2, tool holder; 3, forming tool; 4, set screw; 5, hexagonal bolt; 6, limiting mechanism; 61, first hollow column; 62, piston rod; 63, bent pipe; 64, spring; 65, second hollow column; 66, piston group; 67, annular sleeve. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides a technical solution, please refer to Figure 1 , Figure 2 and Figure 4 A marine diesel engine injector mounting seat hole grinding tool comprises: a guide sleeve 1, and an inner hole is formed on the top of the guide sleeve 1, a tool holder 2 is inserted inside the guide sleeve 1, a knurled groove is formed on the outside of the tool holder 2, a hexagonal block is fixedly connected to the top of the tool holder 2, the knurled groove facilitates the installation, positioning and disassembly of the tool holder 2, and the hexagonal block facilitates the operator to perform the repair and grinding operation on the bottom injector seat hole.

[0024] The top two ends of the guide sleeve 1 are connected with hexagonal bolts 5, the bottom of the tool holder 2 is connected with a forming tool 3, a groove is provided at the bottom of the tool holder 2, and the forming tool 3 is inserted into the groove. The groove facilitates the connection between the forming tool 3 and the tool holder 2. The outer two ends of the tool holder 2 are connected with fixing screws 4, the fixing screws 4 pass through the inside of the groove, and the fixing screws 4 and the forming tool 3 are threadedly connected. The fixing screws 4 can fix the forming tool 3 and the tool holder 2.

[0025] The tolerance of the inner hole of the guide sleeve 1 is +0.021, and the tolerance of the outer circle of the tool holder 2 is -0.020 / -0.041. The accuracy of processing positioning is ensured by the cooperation of the two. Two threaded holes are opened at both ends of the outside of the tool holder 2 for installing the set screws 4 to fix the forming tool 3. The tolerance of the outer diameter of the tool at the bottom of the forming tool 3 is -0.20 / -0.30; ensure that the aperture size accuracy of the injector mounting seat hole during repair and grinding meets the original design requirements.

[0026] See also Figure 3 The outside of the tool holder 2 is sleeved with a limiting mechanism 6, which includes a first hollow column 61 and a second hollow column 65. The first hollow column 61 and the second hollow column 65 are respectively sleeved on the two ends of the outside of the tool holder 2. The inside of the first hollow column 61 is slidably connected to a piston rod 62, and the inside of the second hollow column 65 is slidably connected to a piston group 66, and the bottom of the piston group 66 is connected to an annular sleeve 67.

[0027] The movement of the piston rod 62 inside the first hollow column 61 generates airflow, which enters the interior of the second hollow column 65 through the curved pipe 63, and then pushes the piston group 66 and the annular sleeve 67 to protect the forming tool 3 and the tool holder 2. The piston group 66 and the top of the piston rod 62 are both connected to a spring 64, and the spring 64 is respectively connected to the second hollow column 65 and the first hollow column 61. When the tool holder 2 is disassembled, the limiting mechanism 6 returns to its original position as a whole.

[0028] This solution first assembles the guide sleeve 1 to the outer shell fixed to the injector mounting seat by the hexagonal bolt 5, controls the positioning accuracy of the tool holder 2 by the inner hole positioning method of the guide sleeve 1, fixes the forming tool 3 to the bottom of the tool holder 2 by the set screw 4 to form a tool, thereby grinding and maintaining the injector mounting seat hole, and then ensures the processing depth, angle and aperture size of the injector mounting seat hole during repair and grinding, so that the injector mounting seat hole maintains the original design requirements of the drawing and unifies the benchmark, achieving the purpose of repairing the old as new;

[0029] At the same time, after the guide sleeve 1 is installed with the tool holder 2 and inserted into the guide sleeve 1, the piston rod 62 will be resisted by the guide sleeve 1 and rise, thereby generating airflow, which enters the interior of the second hollow column 65 through the curved pipe 63, and then pushes the piston group 66 and the annular sleeve 67 down, thereby shielding and protecting the junction of the forming tool 3 and the set screw 4, preventing the waste chips generated by grinding from affecting the set screw 4, and at the same time increasing the strength of the forming tool 3 during grinding;

[0030] The positioning problem of the key dimensions and angles of the injector mounting hole during the repair and grinding process is solved. The positioning accuracy is high and the loading and unloading is simple and fast, which overcomes the disadvantages of large ordinary positioning errors and greatly improves the production efficiency of repair and renovation. At the same time, it ensures that the assembly positioning of the injector, one of the important parts of the diesel engine, meets the design requirements, ensures the normal operation of the diesel engine and the safe and normal navigation of the ship. The positioning method using the inner hole as the reference is adopted, which has a relatively large promotion value in the high-precision positioning, repair and grinding of parts using the inner hole as the reference. At the same time, through the additional limiting mechanism 6, when the tool holder 2 is assembled, the connection between the forming tool 3 and the tool holder 2 and the fixing screw 4 are automatically protected to avoid carbon deposits splashing on the outside of the tool holder 2, the forming tool 3 and the fixing screw 4 when grinding the carbon deposits, thereby avoiding carbon deposits affecting the normal disassembly of the tool holder 2 and the forming tool 3, and at the same time, the connection strength between the tool holder 2 and the forming tool 3 can be increased.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A marine diesel engine injector mounting seat hole grinding tool, comprising: A guide sleeve (1) is provided with an inner hole at the top of the guide sleeve (1), characterized in that a tool holder (2) is inserted inside the guide sleeve (1), two ends of the top of the guide sleeve (1) are connected with hexagonal bolts (5), a forming tool (3) is connected to the bottom of the tool holder (2), two ends of the outside of the tool holder (2) are connected with set screws (4), and a limiting mechanism (6) is sleeved on the outside of the tool holder (2).

2. A marine diesel engine injector mounting seat hole grinding tool according to claim 1, characterized in that: The limiting mechanism (6) comprises a first hollow column (61) and a second hollow column (65), wherein the first hollow column (61) and the second hollow column (65) are respectively sleeved on two ends of the outside of the tool holder (2), the interior of the first hollow column (61) is slidably connected to a piston rod (62), the interior of the second hollow column (65) is slidably connected to a piston group (66), and the bottom of the piston group (66) is connected to an annular sleeve (67).

3. A marine diesel engine injector mounting seat hole grinding tool according to claim 2, characterized in that: The piston group (66) and the top of the piston rod (62) are both connected to a spring (64), and the spring (64) is respectively connected to the second hollow column (65) and the first hollow column (61).

4. A marine diesel engine injector mounting seat hole grinding tool according to claim 1, characterized in that: The bottom of the tool support (2) is provided with a groove, and the forming tool (3) is inserted into the groove.

5. A marine diesel engine injector mounting seat hole grinding tool according to claim 4, characterized in that: The set screw (4) passes through the interior of the groove, and the set screw (4) is threadedly connected to the forming tool (3).

6. A marine diesel engine injector mounting seat hole grinding tool according to claim 1, characterized in that: The outside of the tool support (2) is provided with a knurled groove, and the top of the tool support (2) is fixedly connected with a hexagonal block.

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