Marine engine, shaft grinding corner support of marine engine and bearing abrasion monitoring system of marine engine

Abstract

The utility model discloses a shaft grinding corner support of a marine engine, and belongs to the technical field of diesel engines. The support adopts a welding structure, comprises two bottom plates with through holes and a rounding bending plate (13), and is fixed on the inner wall of a rack through bolts and gaskets, the rounding design of the bending plate can guide the shaft grinding sensor cable to be laid smoothly, and the cable is prevented from being abraded at the right-angle position of the rack. The utility model solves the problem of abrasion caused by the traditional cable laying mode, ensures that the bending radius of the cable meets the requirement, and can effectively resist the vibration of an engine because the bracket is fixed stably. The structure is simple and reliable, and the reliability of the bearing wear monitoring system is remarkably improved.

Description

Technical Field

[0001] This utility model relates to a structure for a large marine engine, specifically to a shaft wear angle bracket for a marine engine and a marine engine bearing wear monitoring system, belonging to the field of diesel engine technology. Background Technology

[0002] With the continuous upgrading of products, the requirements for performance monitoring of marine engines are becoming more stringent.

[0003] Shipowners and shipyards require the ability to predict the potential for bearing wear on two-stroke diesel engines, necessitating the installation of bearing wear sensors inside the engine frame.

[0004] During ship operation, the bearing wear monitoring sensor measures the distance between the crosshead slider and the two-stroke bearing each time the crosshead slide passes the bottom dead center. This measurement predicts the wear of the two-stroke bearing by measuring the distance between the sensor probe and the crosshead slider. The initial installation clearance between the bearing wear sensor and the crosshead slider is required to be 3mm. During main engine operation, changes in this clearance are measured to predict main engine bearing wear. The bearing wear sensor is connected to the bearing wear system junction box via cable. The bearing wear system junction box is connected to the main engine remote control. Once the bearing wear sensor detects a distance exceeding a certain range from the crosshead slider, the main engine remote control will reduce the main engine speed.

[0005] The cable for the shaft wear sensor needs to be connected from the sensor mounting point to the junction box of the bearing wear monitoring system on the outside of the frame. This path encounters a right-angle corner of the frame, which can cause cable wear. Therefore, a corner bracket needs to be designed. This bracket must not only ensure the safe laying of the shaft wear cable but also securely fix the bracket to the end face inside the frame. Thus, the positioning and design of this shaft wear corner bracket is a key design consideration. Summary of the Invention

[0006] The purpose of this invention is to solve the problem of cable wear caused by the cable laying of existing shaft mill sensors touching the right-angle inner wall of the frame. The invention designs a shaft mill corner bracket that meets design requirements. This bracket not only ensures safe cable laying and proper cable bending, but also securely fixes the bracket to the inner end face of the frame.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0008] A shaft grinding corner bracket for a marine engine, characterized in that it consists of two base plates and a bent plate connecting the two base plates;

[0009] Each of the base plates is provided with a through hole for fixed connection with the threaded hole on the inner wall of the frame by bolts and washers;

[0010] The bent portion of the bending plate adopts a rounded design to guide and fix the shaft wear sensor cable, preventing the cable from wearing at the right angle of the frame.

[0011] Preferably, the rounding radius of the bending plate meets the minimum bending radius requirement of the cable, ensuring that the cable is not damaged during installation.

[0012] Preferably, the support body is made of high-strength steel welded together to withstand the vibration and impact of the marine engine during operation.

[0013] Preferably, the bolts and washers are designed to prevent loosening, ensuring that the bracket remains firmly fixed under long-term vibration.

[0014] On the other hand, this utility model also provides a marine engine bearing wear monitoring system, characterized in that it includes:

[0015] A shaft wear sensor probe is used to monitor changes in the clearance between the crosshead slider and the bearing.

[0016] A bearing wear sensor cable connects the sensor probe to the junction box of the bearing wear monitoring system.

[0017] Preferably, the cable is fixed to the bending plate by binding or clipping to ensure a smooth laying path without loosening.

[0018] Third, a marine engine characterized by including an inner wall of the frame and the aforementioned bearing wear angle bracket for protecting the cable of the bearing wear sensor and improving the reliability of the monitoring system.

[0019] The marine engine is a two-stroke diesel engine, suitable for the power systems of large ships.

[0020] The beneficial technical effects of this utility model are as follows:

[0021] 1. The base plate of the shaft grinding corner bracket of the marine engine has two through holes. These two through holes are fixed to the threaded holes on the frame using bolts and washers. Since the frame is stable and reliable, the corner bracket is also stable and reliable.

[0022] 2. The bending plate of the corner bracket for marine engine shaft mill is rounded to ensure the safe laying of the shaft mill cable on the bracket. The cable bending meets the requirements, avoiding cable wear on the right-angle wall of the frame and meeting the requirements for cable bending and binding. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a diagram showing the usage state of this utility model.

[0025] In the picture,

[0026] 1—Main body, 2—Inner wall of frame, 3—Shaft grinding sensor probe, 4—Bolt, 5—Washer, 6—Shaft grinding sensor cable, 7—Shaft grinding sensor mounting bracket, 11—Base plate, 12—Base plate, 13—Bent plate Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this should not limit the scope of protection claimed by the present invention.

[0028] This utility model is used to fix the cable of a marine engine bearing wear sensor and ensure its secure installation. It guarantees that the cable's bending radius meets requirements, avoids wear on the cable from right angles on the frame, and ensures the sensor cable is properly secured. Please refer to [link to relevant documentation]. Figure 2 The marine engine shaft grinding angle bracket 1

[0029] The shaft wear sensor probe 3 is fastened to the inner wall 2 of the frame by bolts 4 and washers 5 through two threaded holes. The shaft wear sensor probe 3 is mounted on the inner wall 2 of the frame via the shaft wear sensor mounting bracket 7. As a result, the shaft wear sensor cable 6 can be tied to the main body 1, avoiding wear on the cable by the right-angle edge of the inner wall of the frame, and meeting the requirements for secure cable installation and bending.

[0030] Please see Figure 1 The shaft mill corner bracket 1 is a welded assembly, comprising two base plates 11 and 12, and a bent plate 13 connecting the two base plates. Each base plate has a through hole, which aligns with a threaded hole on the inner wall 2 of the frame, and is secured with bolts 4 and washers 5. The bent plate 13 is rounded to ensure the shaft mill sensor cable 6 can be securely fastened to the body 1. This completes the laying of the shaft mill sensor cable 6 at the right angle on the inner wall 2 of the frame, ensuring proper cable installation.

[0031] Installation steps:

[0032] (1) Positioning bracket: Attach the base plates 11 and 12 of the shaft grinding corner bracket 1 to the inner wall 2 of the frame, ensuring that its through holes are aligned with the threaded holes on the frame. (2) Fixing bracket: Use bolts 4 and washers 5 to fasten the bracket to the inner wall 2 of the frame, ensuring a firm installation and preventing loosening due to engine vibration. (3) Laying cable: Lay the shaft grinding sensor cable 6 along the bending plate 13, and use cable ties or fixing clips to fix the cable to the bracket, ensuring that the cable has no direct contact with the right-angle inner wall of the frame. (4) Connecting sensor: Connect one end of the cable 6 to the shaft grinding sensor probe 3, and connect the other end to the junction box of the bearing wear monitoring system to complete the signal transmission path.

[0033] After using this utility model on a certain 9X92DF model, the shipowner was initially worried about the wear and tear of the shaft grinding sensor cable when it was bent on the inner wall of the frame. However, the installation of this shaft grinding corner bracket ensured the reliable installation of the shaft grinding sensor cable, met the requirements for cable bending, and avoided cable wear, which was recognized by the shipyard and shipowner.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. All equivalent changes and modifications made within the scope of the present utility model should be considered within the technical scope of the present utility model.

Claims

1. A shaft grinding angle bracket for a marine engine, characterized in that, It consists of two base plates (11, 12) and a bent plate (13) connecting the two base plates; Each of the base plates (11, 12) is provided with a through hole for fixing to the threaded hole of the inner wall (2) of the frame by means of bolts (4) and washers (5); The bent portion of the bending plate (13) is designed with a rounded shape to guide and fix the shaft grinding sensor cable (6) and prevent the cable from wearing at the right angle of the frame.

2. The shaft grinding angle bracket for a marine engine according to claim 1, characterized in that, The rounding radius of the bending plate (13) meets the minimum bending radius requirement of the cable (6), ensuring that the cable is not damaged during installation.

3. The shaft grinding angle bracket for a marine engine according to claim 1 or 2, characterized in that, The bracket is made of high-strength steel welded together to withstand the vibration and impact of the marine engine during operation.

4. The shaft grinding angle bracket for a marine engine according to claim 1, characterized in that, The bolts (4) and washers (5) are designed to prevent loosening, ensuring that the bracket remains stable and fixed under long-term vibration.

5. A marine engine bearing wear monitoring system, characterized in that, include: Shaft grinding sensor probe (3) is used to monitor the change in the gap between the crosshead slider and the bearing; A bearing wear sensor cable (6) is used to connect the sensor probe (3) to the junction box of the bearing wear monitoring system.

6. The marine engine bearing wear monitoring system according to claim 5, characterized in that, The cable (6) is fixed to the bending plate (13) by binding or buckling to ensure that the laying path is smooth and without looseness.

7. A marine engine, characterized in that, Includes the inner wall of the frame (2) and the shaft wear angle bracket as described in any one of claims 1-4, for protecting the cable (6) of the bearing wear sensor and improving the reliability of the monitoring system.

8. The marine engine according to claim 7, characterized in that, The marine engine is a two-stroke diesel engine, suitable for the power systems of large ships.

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