A marine diesel engine combined intermediate shaft and its mounting method

Abstract

The present application relates to the technical fields of diesel engine manufacturing, and discloses a combined intermediate shaft of marine diesel engine, which comprises a first composite intermediate shaft, one end of the first composite intermediate shaft is movably connected with one end of a second composite intermediate shaft, a stud is sleeved between the one end of the first composite intermediate shaft and the one end of the second composite intermediate shaft, and a nut is threadedly connected with one end of the stud. The combined intermediate shaft of marine diesel engine and the installation method thereof solve the problems of long time for re-production, low utilization rate and large space occupation of the intermediate shaft of the marine diesel engine, and have the advantages of simple operation, high implementability, good effect, etc. The buffer component, the wireless pressure sensor, the data acquisition output controller, the provided space of the displacement slot and the step slot can monitor the connection gap of the first composite intermediate shaft and the second composite intermediate shaft, so that timely maintenance can be performed to reduce the operation loss.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of diesel engine manufacturing, in particular to a combined intermediate shaft of a marine diesel engine and a mounting method thereof. BACKGROUND

[0002] Output power is a performance parameter of a marine diesel engine. In a diesel engine bench test, in order to accurately measure the output power of the diesel engine under various loads, a water-based dynamometer is generally used to simulate the propeller working condition and measure the output power of the diesel engine under various loads. The intermediate shaft between the diesel engine and the water-based dynamometer is an essential tool for connecting the diesel engine and the water-based dynamometer.

[0003] However, the power performance of the diesel main engine required by the ship owner is various, and the type of the water-based dynamometer used in the workshop bench test is not only one, resulting in different sizes of the intermediate shaft. Therefore, the workshop generally has multiple different intermediate shafts to meet the use needs of the workshop bench test. However, when there are many diesel engine bench test plans or new performance main engines need to be tested on the bench, there is no available intermediate shaft, so it is necessary to order a new intermediate shaft, which will consume a lot of time and money, and also result in more and more intermediate shafts in the workshop, and many previously used intermediate shafts are in idle state and cannot be utilized. Therefore, in view of the above problems, the present application provides a combined intermediate shaft of a marine diesel engine and a mounting method thereof. SUMMARY

[0004] (I) Technical problems to be solved

[0005] The present application provides a combined intermediate shaft of a marine diesel engine and a mounting method thereof, which solves the problems in the above background.

[0006] (II) Technical solutions

[0007] The present application provides the following technical solutions: a combined intermediate shaft of a marine diesel engine, comprising a first composite intermediate shaft, one end of the first composite intermediate shaft is movably connected with one end of a second composite intermediate shaft, and a stud is jointly sleeved between the one end of the first composite intermediate shaft and the one end of the second composite intermediate shaft, one end of the stud is threadedly connected with a nut, an installation allowance groove and a stepped groove are respectively formed in the inner side of the one end of the first composite intermediate shaft, the installation allowance groove and the stepped groove are mutually penetrated, a buffer component and a wireless pressure sensor are sleeved in the inside of the installation allowance groove, and a data acquisition output controller and a protection plate are sleeved in the inside of the stepped groove.

[0008] Preferably, the interior of the first composite countershaft comprises a first countershaft body, and one first flange connecting end is fixedly connected to each end of the first countershaft body, and a first pad is movably connected to the bottom of one first flange connecting end away from the second composite countershaft.

[0009] Preferably, the interior of the second composite countershaft comprises a second countershaft body, and one second flange connecting end is fixedly connected to each end of the second countershaft body, and a second pad is movably connected to the bottom of one second flange connecting end away from the first composite countershaft.

[0010] Preferably, the top of the second pad and the top of the first pad are both arc structures, the bottom surface of the second pad is flush with the bottom surface of the first pad, and the second pad and the first pad are made of wood material.

[0011] Preferably, one end of the stud penetrates through one first flange connecting end in the interior of the first composite countershaft and one second flange connecting end in the interior of the second composite countershaft, and is threadedly connected with the screw nut protruding from the end face of the second flange connecting end, the surface of one end of the stud is clamped with a gasket, and the side surface of one side of the gasket is tightly attached to the end face of one first flange connecting end in the interior of the first composite countershaft.

[0012] Preferably, the center of the stepped groove and the center of the installation clearance groove are on the same axis, and a positioning column is fixedly sleeved between the inner side of the middle part of the stepped groove and the inner side of the middle part of the installation clearance groove, and the diameter value of the stepped groove is greater than the diameter value of the installation clearance groove.

[0013] Preferably, the interior of the buffer component comprises a buffer plate, and the buffer plate is movably sleeved in the interior of the installation clearance groove, one side of the buffer plate is fixedly connected with a jacking rod and a compression spring, one end of the jacking rod is movably connected with one side of the wireless pressure sensor, one end of the compression spring is fixedly connected to the inner wall of one side of the installation clearance groove, and the wireless pressure sensor is fixedly sleeved in the interior of the installation clearance groove.

[0014] Preferably, a screw is movably sleeved in the interior of the protective plate, one end of the screw is threadedly connected in the interior of the sidewall of the stepped groove, a clearance groove is formed in the interior of the protective plate, and the clearance groove is aligned with the wireless pressure sensor, the data acquisition and output controller is fixedly sleeved in the interior of one side of the stepped groove, and the data acquisition and output controller is electrically connected with the wireless pressure sensor through a wire, the interior of the data acquisition and output controller comprises a single-chip microcomputer as a core, a signal conditioning circuit, a digital-to-analog conversion circuit, a data transmission module, and a battery.

[0015] A ship diesel engine combined intermediate shaft and its installation method, comprising the following operation steps:

[0016] S1, selecting a first composite intermediate shaft and a second composite intermediate shaft according to the connecting face of the rear end of the diesel engine crankshaft and the connecting flange of the water power tester;

[0017] S2, using hoisting equipment to stably hoist the first composite intermediate shaft and the second composite intermediate shaft, aligning and approaching a first flange connecting end inside the first composite intermediate shaft with a second flange connecting end inside the second composite intermediate shaft, then sequentially penetrating the aligned and approached first flange connecting end and the second flange connecting end with a plurality of stud bolts sleeved with first gaskets and protruding, then corresponding with a plurality of nuts, and then realizing firm installation and preliminary positioning between the first composite intermediate shaft and the second composite intermediate shaft;

[0018] S3, adjusting the concentricity between the first composite intermediate shaft and the second composite intermediate shaft, so that the distance in each direction on the outer circumference of the connected first flange connecting end and the second flange connecting end is consistent, and the specific requirement is that the concentricity is within 0.05mm, and after adjustment is completed and the requirement is met, the connecting stud bolts and nuts are further pumped according to the requirement;

[0019] S4, then adjusting the connection of the overall device with the diesel engine and with the water power tester, after all the connections are completed, measuring the last gear of the diesel engine crankshaft and comparing it with the measured value before connecting with the power tester, which should meet the process requirements;

[0020] S5, in the process of testing, the vibration of the connection between the first composite intermediate shaft and the second composite intermediate shaft will be accepted and buffered by the buffer plate and the compression spring inside the buffer component, and the top pressure rod moving together will constantly contact and collide with the wireless pressure sensor, the wireless pressure sensor will transmit the pressure signal to the data acquisition output controller, and then the data acquisition output controller will transmit the processed signal to the corresponding receiving equipment in a wireless manner, and then a pressure change curve can be drawn, according to the change of the curve, we can know the connection gap between the first composite intermediate shaft and the second composite intermediate shaft in time, and then repair and replace.

[0021] Advantages

[0022] The present application has the following advantages:

[0023] 1、The ship diesel engine combined intermediate shaft and the installation method thereof solve the problems of long time for re-production, low utilization rate and the like of the ship diesel engine intermediate shaft, and have the advantages of simple operation, strong implementability, good effect and the like.

[0024] 2. The ship diesel engine combined intermediate shaft and its installation method, the buffer component, the wireless pressure sensor, the data acquisition output controller, the installation clearance groove and the step groove provide the installation clearance, the first composite intermediate shaft and the second composite intermediate shaft are combined, the connection gap is monitored, timely maintenance is found, and operation loss is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the front view schematic diagram of the structure of the application;

[0026] Figure 2 It is the right view schematic diagram of the structure of the application.

[0027] Figure 3 It is the first composite intermediate shaft of the structure of the application, and the partial sectional view schematic diagram is shown;

[0028] Figure 4 It is the partial sectional view schematic diagram of the protective plate of the structure of the application;

[0029] Figure 5 It is the structure of the application Figure 3 The enlarged schematic diagram of A is shown.

[0030] In the figure: 1, the first composite intermediate shaft; 101, the first intermediate shaft body; 102, the first flange connection end; 2, the second composite intermediate shaft; 21, the second intermediate shaft body; 22, the second flange connection end; 3, the stud; 4, the nut; 5, the gasket; 6, the first pad; 7, the installation clearance groove; 8, the step groove; 9, the buffer component; 91, the buffer plate; 92, the pressing rod; 93, the compression spring; 10, the wireless pressure sensor; 11, the data acquisition output controller; 12, the protective plate; 13, the second pad. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0032] Please refer to Figure 1 , Figure 2The utility model provides a marine diesel engine combined intermediate shaft, including first composite intermediate shaft 1, one end of first composite intermediate shaft 1 is movably connected with one end of second composite intermediate shaft 2, the inside of first composite intermediate shaft 1 includes first intermediate shaft body 101, and one first flange connecting end 102 is fixedly connected to the both ends of first intermediate shaft body 101, and the bottom of the first flange connecting end 102 away from second composite intermediate shaft 2 in two first flange connecting ends 102 is movably connected with first pad 6, and first composite intermediate shaft 1 is as the main body support structure of intermediate shaft, and first pad 6 provides support for first composite intermediate shaft 1, and then makes it not rub with ground, and the inside of second composite intermediate shaft 2 includes second intermediate shaft body 21, and one second flange connecting end 22 is fixedly connected to the both ends of second intermediate shaft body 21, and the bottom of the second flange connecting end 22 away from first composite intermediate shaft 1 in two second flange connecting ends 22 is movably connected with second pad 13, and second composite intermediate shaft 2 is as the adjusting structure of intermediate shaft, and second pad 13 provides support for second intermediate shaft body 21, and then makes it not rub with ground, the top of second pad 13 and first pad 6 is circular arc structure, and the bottom surface of second pad 13 is flush with the bottom surface of first pad 6, second pad 13 and first pad 6 are made of wooden material, and the top of second pad 13 and first pad 6 is circular arc structure and can prevent skidding, increase friction contact area, and one end of first composite intermediate shaft 1 and one end of second composite intermediate shaft 2 are commonly sleeved with stud 3, one end of stud 3 is threadedly connected with nut 4, one end of stud 3 penetrates first flange connecting end 102 in the inside of first composite intermediate shaft 1 and second flange connecting end 22 in the inside of second composite intermediate shaft 2 respectively and is protruded from the end face of second flange connecting end 22 and is threadedly connected with nut 4, the surface of one end of stud 3 is clamped with gasket 5, and the side surface of one side of gasket 5 is closely combined with the end face of first flange connecting end 102 in the inside of first composite intermediate shaft 1, first composite intermediate shaft 1 and second composite intermediate shaft 2 are quickly formed into complete intermediate shaft under the assembly of nut 4, stud 3 and gasket 5, and the problems of occupying site by marine diesel engine intermediate shaft, long time for remaking and low utilization rate are solved.

[0033] Please refer to Figure 3 、 Figure 4 、 Figure 5The inner side of one end of the first composite intermediate shaft 1 is respectively provided with a mounting allowance slot 7 and a stepped slot 8. The center of the stepped slot 8 is on the same axis as the center of the mounting allowance slot 7. A positioning column is fixedly sleeved between the inner side of the middle part of the stepped slot 8 and the inner side of the middle part of the mounting allowance slot 7. The diameter of the stepped slot 8 is greater than the diameter of the mounting allowance slot 7. The mounting allowance slot 7 and the stepped slot 8 provide support and mounting allowance space for subsequent components. The mounting allowance slot 7 and the stepped slot 8 are mutually penetrated. The mounting allowance slot 7 is sleeved with a buffer component 9 and a wireless pressure sensor 10. The buffer component 9 includes a buffer plate 91, which is movably sleeved in the mounting allowance slot 7. The side of the buffer plate 91 is fixedly connected with a pressing rod 92 and a compression spring 93. One end of the pressing rod 92 is movably connected with the side of the wireless pressure sensor 10. One end of the compression spring 93 is fixedly connected with the inner wall of one side of the mounting allowance slot 7. The wireless pressure sensor 10 is fixedly sleeved in the mounting allowance slot 7. The vibration of the connection between the first composite intermediate shaft 1 and the second composite intermediate shaft 2 will be received and buffered by the buffer plate 91 and the compression spring 93 in the buffer component 9. The stepped slot 8 is sleeved with a data acquisition output controller 11 and a protective plate 12. The inside of the protective plate 12 is movably sleeved with a screw, and one end of the screw is threadedly connected with the inside of the sidewall of one side of the stepped slot 8. The inside of the protective plate 12 is provided with an allowance slot, which is aligned with the wireless pressure sensor 10. The data acquisition output controller 11 is fixedly sleeved in the inside of one side of the stepped slot 8, and is electrically connected with the wireless pressure sensor 10 through a wire. The inside of the data acquisition output controller 11 includes a single-chip microcomputer as a core, a signal conditioning circuit, a digital-to-analog conversion circuit, a data sending module, and a battery. The buffer component 9, the wireless pressure sensor 10, the data acquisition output controller 11, and the allowance space provided by the mounting allowance slot 7 and the stepped slot 8 can monitor the connection gap of the first composite intermediate shaft 1 and the second composite intermediate shaft 2, discover and repair in time, and reduce operation loss.

[0034] A ship diesel engine combined intermediate shaft and its installation method, comprising the following operation steps:

[0035] S1, according to the diesel engine crankshaft rear end connecting surface and the water conservancy dynamometer connecting flange, select the first composite intermediate shaft 1 and the second composite intermediate shaft 2;

[0036] S2, the first composite intermediate shaft 1 and the second composite intermediate shaft 2 are aligned and approached by the hoisting equipment, a first flange connecting end 102 inside the first composite intermediate shaft 1 is aligned and approached with a second flange connecting end 22 inside the second composite intermediate shaft 2, then a plurality of studs 3 with first pads 6 are sequentially penetrated through the aligned and approached first flange connecting end 102 and the second flange connecting end 22 and protrude, then are screw-locked with a plurality of nuts 4, thereby realizing firm installation and preliminary positioning between the first composite intermediate shaft 1 and the second composite intermediate shaft 2;

[0037] S3, the concentricity between the first composite intermediate shaft 1 and the second composite intermediate shaft 2 is adjusted, the distance in each direction on the outer circumference of the connected first flange connecting end 102 and the second flange connecting end 22 is consistent, and the specific requirement is that the concentricity is within 0.05mm, after adjustment is completed and the requirement is met, the connecting studs 3 and the nuts 4 are further tightened according to the requirement;

[0038] S4, then the overall device is connected with the diesel engine and the water conservancy dynamometer, after all the connections are completed, the last gear of the crankshaft of the diesel engine is measured, and the measured value before connection with the dynamometer is compared, which should meet the process requirement;

[0039] S5, during the test, the vibration of the connection between the first composite intermediate shaft 1 and the second composite intermediate shaft 2 will be received and buffered by the buffer plate 91 and the compression spring 93 inside the buffer part 9, and the top pressing rod 92 moving with it will constantly contact and collide with the wireless pressure sensor 10, the wireless pressure sensor 10 will transmit the pressure signal to the data acquisition output controller 11, and then the data acquisition output controller 11 will transmit the processed signal to the corresponding receiving equipment in a wireless manner, and a pressure change curve can be drawn, according to the change of the curve, we can know the connection gap between the first composite intermediate shaft 1 and the second composite intermediate shaft 2 in time, and then maintain and replace.

[0040] It should be noted that, in the present text, relational terms such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus that includes a list of elements does not only include those elements but also includes other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0041] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A marine diesel engine combined intermediate shaft, comprising a first composite intermediate shaft (1), one end of the first composite intermediate shaft (1) is movably connected with one end of a second composite intermediate shaft (2), and a stud (3) is jointly sleeved between the one end of the first composite intermediate shaft (1) and the one end of the second composite intermediate shaft (2), one end of the stud (3) is threadedly connected with a nut (4), the inner side of the one end of the first composite intermediate shaft (1) is respectively provided with a mounting clearance groove (7) and a stepped groove (8), the mounting clearance groove (7) and the stepped groove (8) are mutually penetrated, the inside of the mounting clearance groove (7) is sleeved with a buffer component (9) and a wireless pressure sensor (10), the inside of the stepped groove (8) is sleeved with a data acquisition output controller (11) and a protective plate (12); the first composite intermediate shaft (1) comprises a first intermediate shaft body (101), and one first flange connecting end (102) is fixedly connected to each end of the first intermediate shaft body (101), and one first flange connecting end (102) away from the second composite intermediate shaft (2) is movably connected with a first pad (6) at the bottom. The center of the stepped groove (8) and the center of the mounting clearance groove (7) are on the same axis, and a positioning column is jointly fixedly sleeved between the inner side of the middle part of the stepped groove (8) and the inner side of the middle part of the mounting clearance groove (7), and the diameter value of the stepped groove (8) is greater than the diameter value of the mounting clearance groove (7). The inside of the buffer component (9) comprises a buffer plate (91), and the buffer plate (91) is movably sleeved in the inside of the mounting clearance groove (7), the side of the buffer plate (91) is respectively fixedly connected with a pressing rod (92) and a compression spring (93), one end of the pressing rod (92) is movably connected with the side of the wireless pressure sensor (10), one end of the compression spring (93) is fixedly connected to the inner wall on one side of the mounting clearance groove (7), and the wireless pressure sensor (10) is fixedly sleeved in the inside of the mounting clearance groove (7). The inside of the protective plate (12) is movably sleeved with a screw, one end of the screw is threadedly connected in the inside of the side wall of the stepped groove (8), the inside of the protective plate (12) is provided with a clearance groove, and the clearance groove is aligned with the wireless pressure sensor (10), the data acquisition output controller (11) is fixedly sleeved in the inside of the stepped groove (8), and the data acquisition output controller (11) is electrically connected with the wireless pressure sensor (10) through a wire, and the inside of the data acquisition output controller (11) comprises a single-chip microcomputer, a signal conditioning circuit, a digital-to-analog conversion circuit, a data sending module and a battery.

2. A marine diesel engine combined intermediate shaft as claimed in claim 1, characterized in that: The second composite intermediate shaft (2) comprises a second intermediate shaft body (21), and one second flange connecting end (22) is fixedly connected to each end of the second intermediate shaft body (21), and the bottom of one second flange connecting end (22) away from the first composite intermediate shaft (1) is movably connected with a second pad (13).

3. A marine diesel engine combined intermediate shaft according to claim 1 or 2, characterized in that: The top of the second cushion block (13) and the top of the first cushion block (6) are both circular arc structures, and the bottom surface of the second cushion block (13) is flush with the bottom surface of the first cushion block (6), and the second cushion block (13) and the first cushion block (6) are made of wood material.

4. A marine diesel engine combined intermediate shaft as claimed in claim 1, characterized in that: One end of the stud (3) penetrates through a first flange connecting end (102) of the first composite intermediate shaft (1) and a second flange connecting end (22) of the second composite intermediate shaft (2) respectively, and the end surface of the second flange connecting end (22) is protruding and threadedly connected with the nut (4), and the surface of one end of the stud (3) is clamped with the gasket (5), and the side surface of one side of the gasket (5) is closely combined with the end surface of a first flange connecting end (102) of the first composite intermediate shaft (1).

5. A marine diesel engine combined intermediate shaft as claimed in any one of claims 1 to 4, characterized in that, The following operation steps are included: S1, according to the diesel engine crankshaft rear end connecting surface and the water conservancy dynamometer connecting flange, select the first composite intermediate shaft (1) and the second composite intermediate shaft (2); S2, use hoisting equipment to stably hoist the first composite intermediate shaft (1) and the second composite intermediate shaft (2), align and close the first flange connecting end (102) of the first composite intermediate shaft (1) and the second flange connecting end (22) of the second composite intermediate shaft (2), then make the plurality of studs (3) sleeved with the first cushion block (6) penetrate through the aligned and closed first flange connecting end (102) and the second flange connecting end (22) and protrude, then correspondingly screw lock with the plurality of nuts (4), and then realize firm installation and preliminary positioning between the first composite intermediate shaft (1) and the second composite intermediate shaft (2); S3, adjust the concentricity between the first composite intermediate shaft (1) and the second composite intermediate shaft (2), so that the distance in each direction on the outer circumference of the connected first flange connecting end (102) and second flange connecting end (22) is consistent, and the specific requirement is that the concentricity is within 0.05mm, after adjustment is completed and the requirement is met, further tighten the connecting stud (3) and nut (4) as required; S4, then adjust the connection of the overall device with the diesel engine and the water conservancy dynamometer, after all the connections are completed, measure the last gear of the diesel engine, compare it with the value measured before connecting with the dynamometer, and it should meet the process requirements; S5, during the test, the vibration of the connection between the first composite intermediate shaft (1) and the second composite intermediate shaft (2) will be accepted and buffered by the buffer plate (91) and the compression spring (93) inside the buffer part (9), and the top pressure rod (92) moving with it will constantly contact and collide with the wireless pressure sensor (10), the wireless pressure sensor (10) will transmit the pressure signal to the data acquisition output controller (11), and then the data acquisition output controller (11) will transmit the processed signal to the corresponding receiving device in a wireless manner, and a pressure change curve can be drawn, according to the change of the curve, we can know the connection gap between the first composite intermediate shaft (1) and the second composite intermediate shaft (2) in time, and then maintain and replace.

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