Front-end housing of low-speed diesel engine

Abstract

The utility model belongs to the technical field of low-speed diesel engine manufacturing, and particularly relates to a low-speed diesel engine front end housing. Comprising a housing upper half part and a housing lower half part which are combined to accommodate a torsional vibration damper; the upper half part of the housing is provided with a local protruding structure, the structure extends along the depth direction of the housing and exceeds the end surface of the housing, a first mounting cavity for mounting the first position sensor is arranged in the structure, and the size of the first mounting cavity is matched with the appearance of the first position sensor; the upper half portion of the housing is further provided with a flange hole, and the flange hole is located at the position corresponding to a second position sensor on the torsional vibration damper. Functionality and the space utilization rate are both considered, the installation requirement of the torsional vibration damper is met, the position sensor provides an accurate installation space and a wiring channel, and after installation, a diesel engine front end system is high in reliability and convenient to maintain.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of low-speed diesel engine manufacturing, and particularly relates to a front-end cover of a low-speed diesel engine. BACKGROUND

[0002] The design of the front-end cover of a large low-speed marine diesel engine needs to be adapted to key components such as a torsional vibration damper or a frequency modulation wheel installed inside. When the torsional vibration damper is installed inside, a position sensor needs to be configured synchronously to monitor the vibration state.

[0003] The shape and structure of the prior art front-end cover are designed based on the size of the torsional vibration damper, but the installation requirements of the position sensor are not fully considered, resulting in insufficient sensor installation space or interference with the cover. In addition, the external wiring requirements of the position sensor further increase the design complexity, and if the cover does not reserve a special flange opening or local protruding structure, it may affect the stability of the sensor installation and the signal transmission efficiency. The cover in the prior art often needs to compromise between the overall shape and the installation of internal components, and it is difficult to balance functionality and space utilization. Therefore, there is an urgent need for a new front-end cover that can meet the installation requirements of the torsional vibration damper, provide accurate installation space and wiring channels for the position sensor, and avoid interference after installation, thereby improving the reliability and maintenance convenience of the front-end system of the diesel engine. CONTENT OF THE UTILITY MODEL

[0004] The application is to solve the problems of the prior art low-speed diesel engine front-end cover, such as the difficulty in balancing functionality and space utilization, the inability to meet the installation requirements of the torsional vibration damper, the inability to provide accurate installation space and wiring channels for the position sensor, and the interference affecting the reliability and maintenance convenience of the front-end system of the diesel engine after installation. A low-speed diesel engine front-end cover is proposed, which includes: a cover upper half and a cover lower half, which, after being combined, accommodate a torsional vibration damper.

[0005] The cover upper half is provided with a local protruding structure, which extends along the depth direction of the cover and exceeds the end face of the cover, and has a first installation cavity inside for installing a first position sensor, and the size of the first installation cavity matches the shape of the first position sensor.

[0006] The cover upper half is also provided with a flange opening, which is located at a position corresponding to a second position sensor of the torsional vibration damper, and its aperture and position are adapted to the external wiring requirements of the second position sensor.

[0007] The spatial layout of the local protruding structure and the flange opening meets the independent installation requirements of the two position sensors and does not interfere with the assembly of the cover and peripheral equipment.

[0008] According to the low-speed diesel engine front end cover shell, the protruding height of the local protruding structure is 5%-10% of the cover shell depth.

[0009] According to the low-speed diesel engine front end cover shell, the flange opening has a hole diameter of 20-50mm, and a sealing groove is arranged at the opening edge.

[0010] According to the low-speed diesel engine front end cover shell, the upper half of the cover shell is connected with the lower half of the cover shell through bolts, and a waterproof rubber strip is arranged at the joint surface.

[0011] According to the low-speed diesel engine front end cover shell, the inner wall of the local protruding structure is provided with a shock-absorbing pad.

[0012] According to the low-speed diesel engine front end cover shell, the cover shell is made of cast steel or cast aluminum.

[0013] According to the low-speed diesel engine front end cover shell, a detachable dust cover is arranged outside the flange opening.

[0014] According to the low-speed diesel engine front end cover shell, a drain hole is arranged at the bottom of the lower half of the cover shell.

[0015] According to the low-speed diesel engine front end cover shell, the axial length of the local protruding structure is 1.2-1.5 times the installation length of the sensor.

[0016] According to the low-speed diesel engine front end cover shell, the inner wall of the cover shell is coated with a high-temperature-resistant anticorrosive coating.

[0017] The beneficial effects of the present application are as follows:

[0018] 1. The upper half of the cover shell of the present application is provided with a local protruding structure, which provides additional installation space for the position sensor without changing the overall outer circle size, and ensures accurate alignment with the torsional vibration damper.

[0019] 2. The flange opening of the present application provides a special channel for the external wiring of the sensor, avoiding friction or extrusion of the wiring with the cover shell, and ensuring the stability of signal transmission.

[0020] 3. The cover shell of the present application is divided into an upper half and a lower half, which is convenient for installation and maintenance, and at the same time, through optimization of the internal space layout, ensures the cooperative operation of the torsional vibration damper and the sensor. The actual application shows that this design has no space interference problem in the bench test, significantly improving the installation efficiency and system reliability. The present application not only expands the structure and function of the front end cover shell, but also provides a flexible adaptation scheme for the front end arrangement of different models, and has high engineering practical value. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of the overall front-end housing design.

[0022] In the figure: 1 - upper housing half, 2 - lower housing half, 3 - partial protruding structure, 4 - flange opening. DETAILED DESCRIPTION

[0023] Preferred embodiment

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort fall within the scope of the present application.

[0025] As shown in the figure: in this embodiment, a low-speed diesel engine front-end housing comprises: Figure 1

[0026] The upper housing half 1 and the lower housing half 2, when combined, accommodate a torsional vibration damper.

[0027] The upper housing half 1 is provided with a partial protruding structure 3, which extends along the depth direction of the housing and protrudes beyond the end face of the housing, and has a first mounting cavity inside for mounting a first position sensor, and the size of the first mounting cavity matches the outer shape of the first position sensor.

[0028] The upper housing half 1 is also provided with a flange opening 4, which is located at a position corresponding to a second position sensor of the torsional vibration damper, and the hole diameter and position of the flange opening 4 are adapted to the external wiring requirements of the second position sensor.

[0029] The spatial layout of the partial protruding structure 3 and the flange opening 4 meets the independent installation requirements of the two position sensors, and does not interfere with the assembly of the housing and peripheral equipment.

[0030] The protruding height of the partial protruding structure 3 is 5%-10% of the depth of the housing. The hole diameter of the flange opening 4 is 20-50 mm, and the opening edge is provided with a sealing groove.

[0031] The upper housing half 1 and the lower housing half 2 are connected by bolts, and a waterproof rubber strip is provided at the joint surface. The inner wall of the partial protruding structure 3 is provided with a shock-absorbing gasket. The housing is made of cast steel or cast aluminum. The outer side of the flange opening 4 is provided with a detachable dust cover. The bottom of the lower housing half 2 is provided with a drain hole. The axial length of the partial protruding structure 3 is 1.2-1.5 times the installation length of the sensor. The inner wall of the housing is coated with a high-temperature-resistant anticorrosive coating.

[0032] ​The cover of the low-speed diesel engine front-end cover is composed of an upper cover half 1 and a lower cover half 2 connected by bolts, and waterproof rubber strips are embedded at the joint surface to enhance the sealing performance. The overall outer diameter of the cover is designed according to the size of the torsional vibration damper, and the internal space is reserved with sufficient margin to avoid contact with the damper.

[0033] At a specific position of the upper cover half 1, a partial protruding structure 3 is designed, which extends along the depth direction of the cover and protrudes outward, with a protruding height of 8% of the outer diameter of the cover. The first installation cavity is formed inside the structure, and the size and position of the cavity are accurately matched with the shape of the sensor to ensure that the sensor does not shake after installation. Shock-absorbing pads are attached to the inner wall of the first cavity to absorb the vibration impact during diesel engine operation. The axial length of the protruding structure 3 is 1.3 times the installation length of the sensor, providing convenience for wiring operation.

[0034] A flange opening 4 is also provided on the upper cover half 1, with a hole diameter of 30 mm, and the flange opening 4 is aligned with the second position sensor on the torsional vibration damper. An annular sealing groove is processed on the edge of the flange opening 4, and a rubber sealing ring is embedded during installation to prevent dust or water from entering. A detachable dust cover is arranged outside the flange opening 4, which can be quickly opened for line maintenance during routine maintenance.

[0035] The lower cover half 2 is provided with a drainage hole with a diameter of 5 mm at the bottom, which is used to drain condensed water or accidentally entered liquid to avoid rusting of internal components. The overall cover is made of cast aluminum material, and the inner wall is coated with a high-temperature resistant and corrosion-resistant coating to withstand the high-temperature environment of the diesel engine and oil pollution corrosion.

[0036] During installation, the torsional vibration damper is first fixed to the front end of the diesel engine, and then the two position sensors are installed in the specified positions of the damper.

[0037] Next, the lower cover half 2 is buckled to the bottom of the torsional vibration damper, and the positioning pin is aligned and locked with the bolts.

[0038] Finally, the upper half 1 is covered on the lower half 2, ensuring that the partial protruding structure 3 and the flange opening 4 are respectively aligned with the two sensors, and the connecting bolts are tightened to complete the assembly.

[0039] Bench test shows that the cover does not have space interference or abnormal vibration during the full operating condition of the diesel engine, and the sensor signal transmission is stable. The design of the partial protruding structure 3 and the flange opening 4 effectively solves the installation conflict problem of the traditional cover, and significantly improves the maintenance convenience. The invention can be adapted to various low-speed diesel engine models, and by adjusting the size of the protruding structure and the opening position, it can meet the installation requirements of different sensors, and has wide application prospects.

[0040] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, should be covered within the protection scope of the present application.

Claims

1. A front cover for a low-speed diesel engine, characterized in that, include: The upper half (1) and the lower half (2) of the housing are combined to house the torsional vibration damper. The upper half (1) of the cover is provided with a partial protrusion structure (3), which extends along the depth direction of the cover and extends beyond the end face of the cover. Inside the structure is a first mounting cavity for mounting the first position sensor, and the size of the first mounting cavity matches the shape of the first position sensor. The upper part (1) of the cover is also provided with a flange opening (4), which is located at the position corresponding to the second position sensor on the torsional vibration damper. Its diameter and position are adapted to the external wiring requirements of the second position sensor. The spatial layout of the local protruding structure (3) and the flange opening (4) satisfies the independent installation requirements of the two position sensors and does not interfere with the assembly of the housing and the peripheral equipment.

2. The low-speed diesel engine front end cover according to claim 1, characterized in that, The protrusion height of the local protrusion structure (3) is 5%-10% of the depth of the casing.

3. The low-speed diesel engine front end cover according to claim 1, characterized in that, The flange opening (4) has a diameter of 20-50mm, and a sealing groove is provided at the edge of the opening.

4. The low-speed diesel engine front end cover according to claim 1, characterized in that, The upper half (1) of the cover and the lower half (2) of the cover are connected by bolts, and a waterproof strip is provided at the joint surface.

5. A low-speed diesel engine front end cover according to claim 1, characterized in that, The inner wall of the locally protruding structure (3) is provided with a shock-absorbing pad.

6. The low-speed diesel engine front end cover according to claim 1, characterized in that, The casing is made of cast steel or cast aluminum.

7. A low-speed diesel engine front end cover according to claim 1, characterized in that, A removable dust cover is provided on the outside of the flange opening (4).

8. A low-speed diesel engine front end cover according to claim 1, characterized in that, The bottom of the lower half of the cover (2) is provided with a drainage hole.

9. A low-speed diesel engine front end cover according to claim 1, characterized in that, The axial length of the local protruding structure (3) is 1.2-1.5 times the sensor installation length.

10. A low-speed diesel engine front end cover according to claim 1, characterized in that, The inner wall of the casing is coated with a high-temperature resistant and corrosion-resistant coating.

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