A high-speed diesel engine oil regulating universal shaft torque checking tool

Abstract

The application discloses a high-speed diesel engine oil regulating universal shaft torque checking tool, which comprises a connecting seat and a sleeve, wherein the connecting seat is of an integrated structure, the connecting seat is fastened and connected with the oil regulating universal shaft or related structures thereof through bolt holes on a straight plate, and the sleeve is arranged in cooperation with the end of the oil regulating universal shaft and is used for transmitting a torsional load. During the checking process, an external force is applied to one end of the connecting seat through a torque wrench, the external force is converted into a torque around the axis of the oil regulating universal shaft, and thus the transmission torque of the oil regulating universal shaft is checked. The application has the advantages of simple structure, convenient operation, detection without complicated disassembly and assembly, intuitive torque condition of the oil regulating universal shaft, and improved maintenance efficiency and operation reliability of the high-speed diesel engine system.

Description

Technical Field

[0001] This invention relates to the field of marine diesel engine testing and maintenance technology, and in particular to a tool for checking the torque of the universal joint for adjusting oil flow in a high-speed diesel engine. Background Technology

[0002] Marine high-speed diesel engines serve as the primary power source for ship propulsion and marine power generation systems, and their fuel supply is typically regulated by a fuel adjustment mechanism. Due to unavoidable axial misalignment between the diesel engine body, the fuel adjustment mechanism, and related accessories during installation, a universal joint is usually used as the transmission connector between the fuel adjustment mechanism and the governor to ensure reliable transmission of fuel adjustment commands.

[0003] During long-term use, the torque transmitted by the universal joint for oil adjustment is affected by factors such as assembly condition, shaft misalignment, and resistance of related mechanisms. When the torque transmitted by the universal joint is too high, it can easily lead to increased resistance in the oil adjustment transmission, sluggish oil adjustment action, and even abnormal wear of the universal joint and related connecting parts, affecting the reliability of the diesel engine's oil adjustment system. Therefore, checking the torque transmitted by the universal joint for oil adjustment is of great significance during the installation, commissioning, and maintenance of diesel engines.

[0004] In existing technologies, the inspection of the oil adjusting universal joint of marine diesel engines relies mainly on manual experience or visual inspection, which cannot quantitatively assess its actual transmitted torque. In some cases, it is necessary to disassemble the universal joint or related components and use general-purpose tools for inspection, which is cumbersome and cannot accurately reflect the transmission resistance in the assembled state. The above inspection methods cannot meet the requirements of high reliability and standardized maintenance for marine diesel engines. Therefore, it is necessary to provide a special tool that is simple in structure, easy to use, and can quantitatively check the transmitted torque of the oil adjusting universal joint in the installed or maintenance state. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a torque testing tool for a high-speed diesel engine oil regulating universal joint, which can quantitatively detect the transmitted torque of the universal joint in its actual assembly state without disassembling it while the diesel engine is stopped. To achieve the above objectives, the present invention provides the following technical solution: A high-speed diesel engine oil adjustment universal joint torque checking tool, characterized in that it includes: The connector is an integral structure consisting of a straight plate and a lever arm.

[0006] The straight plate has multiple bolt holes. The straight plate is fastened to the mounting base of the oil adjustment universal joint being tested or the diesel engine body by bolts passing through the bolt holes, so that the joint remains fixed relative to the diesel engine during the testing process.

[0007] The lever arm extends outward from one side of the straight plate and has a fixed extension length. The end of the lever arm is provided with a force-applying structure for cooperating with the working head of the torque wrench to receive externally applied torsional loads.

[0008] A sleeve, wherein the sleeve is a hollow structure.

[0009] One end of the sleeve is fixedly mounted on the straight plate portion of the connector, forming a rigid connection that cannot be rotated relative to each other.

[0010] The other end of the sleeve has an outer contour that matches the center hole of the universal joint at the end of the oil adjusting universal joint.

[0011] The sleeve is inserted into the center hole of the universal joint through its outer contour, forming a coaxial connection without relative rotation, thereby keeping the inspection tool and the oil adjusting universal joint coaxially linked.

[0012] Working principle and torque transmission path: When an external force is applied to the force-applying structure at the end of the lever arm by a torque wrench, the external force is converted into a torque around the axis of the oil adjusting universal joint via the lever arm of a fixed length. This torque is transmitted to the oil adjusting universal joint in sequence through the straight plate of the connector, the sleeve, and the mating surface of the center hole of the universal joint, so as to drive the oil adjusting universal joint to overcome its own transmission resistance and the transmission resistance of the connected oil adjusting mechanism, thereby realizing a quantitative check of the transmitted torque of the oil adjusting universal joint in the actual assembly state.

[0013] As a preferred technical solution: the force-applying structure at the end of the lever arm is a square groove or square hole, which is adapted to the shape of the square connector of a standard torque wrench to prevent relative rotation during the force application process.

[0014] As a preferred technical solution, the sleeve is fixed to the straight plate portion of the connector by welding or interference fit, forming a rigid connection that cannot be rotated relative to each other.

[0015] As a preferred technical solution, the fit between the outer contour of the sleeve and the inner contour of the universal joint center hole is a clearance fit, transition fit, or keyway fit, to ensure that the sleeve can be smoothly inserted into the universal joint center hole and there is no relative slippage when transmitting torque.

[0016] As a preferred technical solution: the length L of the lever arm is calibrated according to the expected torque range of the oil adjusting universal joint being measured and the range of the torque wrench, and the specific value of the length L is marked on the surface of the lever arm.

[0017] As a preferred technical solution: the torque checking tool is used when the diesel engine is stopped, and there is no need to disassemble the oil adjusting universal joint during use, so that the transmitted torque of the oil adjusting universal joint in its original installation position and actual assembly state can be quantitatively detected directly.

[0018] The present invention also provides a method for torque inspection using the above-mentioned inspection tool, comprising the following steps: Step 1: With the diesel engine stopped, clean the center hole of the universal joint at the end of the oil adjusting universal joint and the surrounding mounting surface to ensure that there is no oil or impurities. Step 2: Place the straight plate of the connector onto the mounting base of the oil adjusting universal joint or the diesel engine body, align the bolt holes on the straight plate with the mounting thread holes, then insert the bolts and tighten them, thereby fixing the connector relative to the diesel engine body. Step 3: Align the sleeve fixed on the connector along the axial direction and insert it into the center hole of the universal joint at the end of the oil adjusting universal joint until the sleeve and the center hole of the universal joint form a coaxial fit without relative rotation, thereby realizing the linkage connection between the inspection tool and the oil adjusting universal joint. Step 4: Connect the working head of the torque wrench to the force-applying structure at the end of the lever arm of the connector, and slowly and evenly apply external force in the specified oil adjustment direction; Step 5: When it is observed that the oil adjusting universal joint begins to overcome static friction and generate initial rotation or reaches the test state specified in the maintenance procedure, immediately stop adding external force and read the torque value displayed on the torque wrench. This torque value is the actual transmitted torque of the oil adjusting universal joint in the current assembly state. Step Six: Compare the torque value read in Step Five with the allowable torque range specified in the diesel engine technical documents or maintenance standards to determine whether the oil adjusting universal joint has problems such as excessively tight assembly, abnormal transmission resistance, or loose connection. Step 7: After the test is completed, slowly release the external force applied by the torque wrench, and then pull the sleeve out of the center hole of the universal joint in sequence, remove the connecting bolts between the connector and the diesel engine body, so that the oil adjusting universal joint and the connected oil adjusting mechanism are restored to their original working state before the test.

[0019] Compared with related technologies, the high-speed diesel engine oil adjustment universal joint torque checking tool provided by the present invention has the following beneficial effects: By using a connector, external force is stably converted into torque and transmitted to the universal joint for adjusting the oil flow, enabling quantitative detection of the universal joint's torque. This avoids the problems of relying on experience and difficulty in quantifying test results in existing technologies. The tool consists only of a connector and a sleeve, with a simple and compact structure, convenient installation and operation. It completes the test without disassembling the universal joint, accurately reflecting the transmission resistance of the universal joint in its actual assembly state. The test results are stable and repeatable, helping to promptly detect assembly deviations or transmission abnormalities, thus improving the operational reliability and maintenance efficiency of the high-speed diesel engine oil adjusting system. Attached Figure Description

[0020] Figure 1 This is one of the schematic diagrams showing the overall structure and the universal joint fit of the high-speed diesel engine oil adjustment universal joint torque checking tool of the present invention; Figure 2 This is one of the schematic diagrams showing the overall structure and the universal joint fit of the high-speed diesel engine oil adjustment universal joint torque checking tool of the present invention; Figure 3 This is one of the overall structural schematic diagrams of the high-speed diesel engine oil adjustment universal joint torque checking tool of the present invention; Figure 4 This is one of the overall structural schematic diagrams of the high-speed diesel engine oil adjustment universal joint torque checking tool of the present invention; Figure 5 This is a schematic diagram of the structure of the connector device of the present invention; Figure 6 This is a schematic diagram of the sleeve device of the present invention; The following are the labels in the diagram: 1. Connector; 2. Sleeve; 3. Universal joint; 11. Lever arm; 12. Straight plate; 13. Bolt hole; 21. Sleeve center hole; 31. Universal joint center hole; 32. Pin hole; 33. Universal joint cross shaft. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0023] Example 1: This invention provides a tool for checking the torque of a high-speed diesel engine oil adjusting universal joint, such as... Figure 1-3 As shown, this is used to detect the torque of the universal joint in the fuel regulating system of a high-speed diesel engine. The universal joint is installed in the transmission mechanism of the diesel engine and is used to transmit fuel regulating motion. The magnitude of its transmitted torque directly affects the working reliability of the fuel regulating system.

[0024] The high-speed diesel engine oil adjustment universal joint torque checking tool includes a connector 1 and a sleeve 2, wherein the connector 1 is an integral structure.

[0025] The connector 1 includes a straight plate portion 12 and a lever arm portion 11. The straight plate portion 12 has multiple bolt holes 13, and the connector 1 is fastened to the oil adjusting universal joint by bolts. The design of the connector ensures a stable connection between the connector and the universal joint during the testing process, preventing loosening or displacement, thereby ensuring the accuracy of the testing.

[0026] The straight plate 12 supports the lever arm 11 and ensures that the lever arm can effectively transmit external force. The lever arm 11 extends from one side of the connector 1 and has a fixed length. The top of the lever arm is used to apply external force through a torque wrench to ensure the stability and consistency of torque detection.

[0027] The sleeve 2 is positioned at the corresponding location of the connector, and its external dimensions are adapted to the center hole 31 of the universal joint, ensuring that the sleeve and the end of the oil adjusting universal joint can be stably fitted. The inspection tool is then connected to the oil adjusting universal joint to ensure that the two remain coaxial during the inspection process.

[0028] During torque testing, sleeve 2 is used solely to ensure coaxial alignment between the oil adjusting universal joint and the testing tool. Sleeve 2 is inserted into the center hole 31 of the oil adjusting universal joint to ensure coaxial alignment between the tool and the universal joint, thereby avoiding measurement errors caused by eccentricity.

[0029] In actual use, with the diesel engine in a stopped state, the connector 1 is attached to the mounting position of the oil adjusting universal shaft 3, so that the bolt holes 13 on the straight plate 12 are aligned with the original mounting holes, and the bolts are tightened to keep the connector 1 stable relative to the diesel engine. The connector can withstand the applied external force and stably transmit it to the oil adjusting universal shaft 3.

[0030] Connect sleeve 2 to the oil adjusting universal joint to ensure that the oil adjusting universal joint and the inspection tool are coaxially aligned, preventing poor fit and thus ensuring the accuracy of the torque inspection results.

[0031] After installation, apply external force gradually in the specified direction on the upper end of the connector using a torque wrench. The external force is converted into torque around the axis of the oil adjusting universal joint and acts on the oil adjusting universal joint through the connector.

[0032] When the applied torque reaches the point where the universal joint overcomes its own resistance and the resistance of the oil regulating mechanism, the stress torque value can be obtained.

[0033] By comparing the obtained torque value with the allowable torque range specified in the design requirements, assembly standards, or maintenance technical documents, it can be determined whether the oil adjusting universal joint has problems such as tight assembly, abnormal transmission resistance, or poor operating condition.

[0034] After the test is completed, release the external force applied by the torque wrench, and remove the sleeve 2 and the connector 1 in sequence to restore the oil adjusting universal joint 3 and the oil adjusting system to their original state.

[0035] The working principle of the high-speed diesel engine oil adjustment universal joint torque checking tool provided by this invention is as follows: During the testing process, the connector is fixedly connected to the oil adjusting system through bolt holes on its plate, ensuring the connector remains in a stable position during testing. The sleeve is fitted to the end of the oil adjusting universal joint to transmit the force generated by the tool to the universal joint. Because the connector is an integral structure, when an external force is applied by a torque wrench, the external force is converted into a torque around the axis of the oil adjusting universal joint through a fixed-length lever arm, and then acts on the oil adjusting universal joint through the sleeve.

[0036] By controlling the magnitude of the external force applied by the torque wrench and combining it with the lever arm of the mounting bracket, the torque can be quantitatively obtained. This torque value can intuitively reflect the stress state of the oil adjusting universal joint and related transmission mechanisms, thereby enabling a quantitative assessment of assembly quality, transmission resistance, and operational reliability.

[0037] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A high speed diesel engine oil regulating cardan shaft torque checking tool, characterized by, include: The connector (1) is an integral structure consisting of a straight plate (12) and a lever arm (11). The straight plate (12) has multiple bolt holes (13). The straight plate (12) is fastened to the mounting base of the oil adjusting universal shaft (3) or the diesel engine body through bolts passing through the bolt holes (13), so that the connector (1) remains fixed relative to the diesel engine during the testing process. The lever arm (11) extends outward from one side of the straight plate (12) and its extension length is a fixed value. The end of the lever arm (11) is provided with a force-applying structure for cooperating with the working head of a torque wrench to receive externally applied torsional loads. Sleeve (2), the sleeve (2) is a hollow structure, one end of the sleeve (2) is fixedly set on the straight plate part (12) of the connector (1), and the other end of the sleeve (2) has an outer contour that matches the universal shaft center hole (31) at the end of the oil adjusting universal shaft (3); The sleeve (2) is inserted into the center hole (31) of the universal joint through its outer contour, forming a coaxial connection without relative rotation, so that the inspection tool and the oil adjustment universal joint (3) maintain coaxial linkage; When an external force is applied to the force-applying structure at the end of the lever arm (11) by a torque wrench, the external force is converted into a torque around the axis of the oil-adjusting universal shaft (3) through the lever arm (11) with a fixed length. This torque is transmitted to the oil-adjusting universal shaft (3) in sequence through the straight plate (12) of the connector (1), the sleeve (2) and the mating surface of the universal shaft center hole (31), so as to drive the oil-adjusting universal shaft (3) to overcome its own and the transmission resistance of the connected oil-adjusting mechanism, thereby realizing a quantitative check of the transmitted torque of the oil-adjusting universal shaft (3) in the actual assembly state.

2. The high-speed diesel engine oil adjustment universal joint torque checking tool according to claim 1, characterized in that, The force-applying structure at the end of the lever arm (11) is a square groove or square hole, which is adapted to the shape of the square connector of a standard torque wrench to prevent relative rotation during the force application process.

3. The high speed diesel oil regulating universal shaft torque checking tool according to claim 1, characterized in that The sleeve (2) is fixed to the straight plate part (12) of the connector (1) by welding or interference fit, forming a rigid connection that cannot be rotated relative to each other.

4. The high speed diesel oil regulating universal shaft torque check tool according to claim 1, characterized in that The fit between the outer contour of the sleeve (2) and the inner contour of the universal joint center hole (31) is a clearance fit, transition fit or keyway fit, to ensure that the sleeve (2) can be smoothly inserted into the universal joint center hole (31) and there is no relative slippage when transmitting torque.

5. The high speed diesel oil regulating universal shaft torque check tool according to claim 1, characterized in that The length L of the lever arm (11) is calibrated according to the expected torque range of the oil adjustment universal shaft (3) being measured and the range of the torque wrench, and the specific value of the length L is marked on the surface of the lever arm (11).

6. The high speed diesel oil regulating universal shaft torque check tool according to claim 1, characterized in that The torque checking tool performs torque checks without disassembling the universal joint.

7. A method for checking the torque of a high-speed diesel engine governor oil universal shaft by using the torque checking tool according to any one of claims 1-6, characterized in that, The steps are as follows: Step 1: With the diesel engine stopped, clean the center hole (31) of the universal joint (3) and the surrounding mounting surface at the end of the oil adjusting universal joint (3) to ensure that there is no oil or impurities. Step 2: Place the straight plate part (12) of the connector (1) onto the mounting base of the oil adjusting universal shaft (3) or the diesel engine body, align the bolt hole (13) on the straight plate part (12) with the mounting thread hole, then insert the bolt and tighten it, so that the connector (1) remains fixed relative to the diesel engine body. Step 3: Align the sleeve (2) fixed on the connector (1) axially and insert it into the universal joint center hole (31) at the end of the oil adjusting universal joint (3) until the sleeve (2) and the universal joint center hole (31) form a coaxial fit without relative rotation, thereby realizing the linkage connection between the inspection tool and the oil adjusting universal joint (3). Step 4: Match the working head of the torque wrench with the force-applying structure at the end of the lever arm (11) of the connector (1), and slowly and evenly apply external force along the specified oil adjustment direction; Step 5: When it is observed that the oil adjusting universal joint (3) begins to overcome static friction and generate initial rotation or reaches the detection state specified in the maintenance procedure, immediately stop adding external force and read the torque value displayed on the torque wrench. This torque value is the actual transmitted torque of the oil adjusting universal joint (3) in the current assembly state. Step 6: Compare the torque value read in Step 5 with the allowable torque range specified in the diesel engine technical documents or maintenance standards to determine whether the oil adjusting universal joint (3) has problems such as excessively tight assembly, abnormal transmission resistance, or loose connection. Step 7: After the test is completed, slowly release the external force applied by the torque wrench, and then pull the sleeve (2) out of the center hole (31) of the universal joint and remove the connecting bolts between the connector (1) and the diesel engine body, so that the oil adjusting universal joint (3) and the connected oil adjusting mechanism are restored to their original working state before the test.

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