Shore wall test method for shaft generator of large box ship

Abstract

The invention discloses a quay wall test method for a shaft generator of a large box ship. The quay wall test method comprises the following steps: step 1, loosening a hydraulic bolt for connecting a middle shaft flange and a tail shaft flange by using a hydraulic tool; step 2, mounting a disengagement fixing device on the periphery of the tail shaft; 3, the tail shaft and the propeller connected with the tail shaft are horizontally moved backwards through the disengaging and fixing device, and the horizontal moving distance is larger than 1 cm; 4, starting the host, and driving the axle generator to carry out a load test through the host; 5, after the test is completed, the tail shaft and the propeller connected with the tail shaft are horizontally moved forwards through the disengaging fixing device till the intermediate shaft flange and the tail shaft flange are in butt joint; and 6, a hydraulic tool is used for pressing a hydraulic bolt for connecting the middle shaft flange and the tail shaft flange, and resetting of the ship shafting is completed. By using the test method, the test of the shaft generator can be carried out at a wharf, the safety risk of the test is reduced, and the cost of a later navigation test is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of shaft generator load testing, and in particular to a quay wall testing method for a shaft generator of a large box ship. Background Art

[0002] In order to reduce ship fuel consumption, more and more ships are equipped with shaft generators. On large container ships, shaft generators are all shaft-clamped type, and the propellers are all fixed pitch. If the shaft test is carried out on the quay wall, the dock cannot withstand the thrust of the propeller, so the current tests of shaft generators are all carried out during sea trials. However, there are the following disadvantages in testing shaft generators during sea trials: 1. The sea trial time is increased by about 10 hours, which increases the cost of the sea trial; and more waiting time is required when the shaft generator system fails during the test and requires shore support; 2. The power of the temporary resistor load is large, and there are many problems with the protection and fixation of the temporary resistor on the ship; 3. There are many cables temporarily pulled on the ship for this purpose, which poses a safety hazard when there are many sea trial personnel.

[0003] Therefore, it is necessary to provide a large container ship shaft generator quayside test method to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide a large container ship shaft generator quay wall test method in view of the deficiencies in the prior art, which can carry out the test of the shaft generator at the dock, reduce the safety risk of the test, and shorten the cost of subsequent navigation tests.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A large container ship shaft generator quayside test method, wherein the shaft generator is connected to the ship shaft system, the shaft system comprises an intermediate shaft, a tail shaft, an intermediate shaft flange, a tail shaft flange and hydraulic bolts, one end of the tail shaft is provided with a propeller, and the other end is provided with a tail shaft flange, one end of the intermediate shaft is provided with an intermediate shaft flange, and the other end is connected to the shaft generator, and the intermediate shaft flange and the tail shaft flange are detachably connected by hydraulic bolts, comprising the following steps:

[0007] Step 1, loosen the hydraulic bolts connecting the intermediate shaft flange and the tail shaft flange using a hydraulic tool; Step 2, install a disengagement fixture on the outer periphery of the tail shaft;

[0008] Step 3: Use the disengagement fixture to translate the tail shaft and the propeller connected to the tail shaft backwards, with the translation distance being greater than 1 cm;

[0009] Step 4, start the main engine and drive the shaft generator through the main engine to perform a load test;

[0010] Step 5: After the test is completed, use the disengagement fixture to translate the tail shaft and the propeller connected to the tail shaft forward until the intermediate shaft flange and the tail shaft flange are docked;

[0011] Step 6: Use a hydraulic tool to tighten the hydraulic bolts connecting the intermediate shaft flange and the tail shaft flange to complete the reset of the ship's shafting.

[0012] Preferably, in step 3, the disengagement and fixing device includes two adjustment bases symmetrically distributed on both sides of the tail shaft, and also includes a clamp arranged around the outer periphery of the tail shaft, and a clamping bolt hole and a displacement bolt hole are respectively provided on both sides of the clamp, the clamping bolt hole is opened in the vertical direction, and the displacement bolt hole is opened along the length direction of the tail shaft, the bottom of the adjustment base is fixedly connected to the hull, and the top of the adjustment base is provided with a fixing bolt hole along the length direction of the tail shaft, the displacement bolt hole and the fixing bolt hole on the same side are connected through an adjusting bolt, a first nut and a second nut are provided at one end of the adjusting bolt close to the fixing bolt hole, and a third nut and a fourth nut are provided at one end of the adjusting bolt close to the displacement bolt hole.

[0013] The method for disengaging the fixing device comprises the following steps:

[0014] Step 1: Install the clamp on the outer periphery of the tail shaft, and use the fastening bolts to press the inner side of the clamp to the outer periphery of the tail shaft along the tightening bolt holes;

[0015] Step 2: Weld fixed adjustment bases on the hull on both sides of the tail shaft according to the position of the clamp, the adjustment base is located between the clamp and the propeller, the displacement bolt hole on the same side corresponds to the fixing bolt hole, the adjustment bolt is passed through between the displacement bolt hole and the fixing bolt hole on the same side, and the first nut and the second nut are respectively installed on the adjustment bolts on both sides of the fixing bolt hole, and the third nut and the fourth nut are respectively installed on the adjustment bolts on both sides of the displacement bolt hole;

[0016] Step 3, tighten and fix the first nut and the second nut on both sides of the fixing bolt hole, loosen the third nut from one side of the displacement bolt hole and keep it away from the displacement bolt hole;

[0017] Step 4, tighten the fourth nut, push the clamp with the fourth nut to drive the tail shaft and propeller to move backward, the translation distance is greater than 1 cm, and the third nut is locked after translation into place;

[0018] Step 5: After the test is completed, first loosen the fourth nut to keep a distance from the displacement bolt hole, then tighten the third nut, and drive the tail shaft and propeller to move forward by pushing the clamp into the third nut until the tail shaft flange and the intermediate shaft flange are docked;

[0019] Step 6, loosen the first nut, the second nut, the third nut and the fourth nut, remove the adjusting bolt, remove the clamp from the tail shaft, and cut the two adjusting bases off the hull.

[0020] Preferably, the tail shaft is coaxially connected to the intermediate shaft, a tail bearing is arranged on the outer periphery of the tail shaft, and an intermediate bearing is arranged on the outer periphery of the intermediate shaft.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. Carrying out the shaft generator test at the dock shortens the time and cost of subsequent sea trials.

[0023] 2. Placing the resistors used for shaft generator testing at the dock facilitates cable connection and controls safety risks.

[0024] 3. Once a shaft generator system failure occurs during the shaft generator test, it will be easy to obtain support from the shore. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the connection between the shaft generator and the shaft system in an embodiment of the present invention;

[0026] Figure 2 It is a schematic diagram of the clamp installed on the outer periphery of the tail shaft;

[0027] Figure 3 It is a schematic diagram of the installation of the disengagement fixture on the tail shaft;

[0028] Among them, 1-shaft generator, 2-intermediate shaft, 3-tail shaft, 4-intermediate shaft flange, 5-tail shaft flange, 6-hydraulic bolts, 7-propeller, 8-tail bearing, 9-intermediate bearing, 10-adjustment base, 11-clamp, 12-displacement bolt hole, 13-adjustment bolt, 14-first nut, 15-second nut, 16-third nut, 17-fourth nut, 18-main engine, 19-fastening bolt DETAILED DESCRIPTION

[0029] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0030] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixed connection" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0031] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0032] like Figures 1 to 3 As shown, a large-scale container ship shaft-driven generator shore wall test method, the shaft-driven generator 1 is connected to the ship shaft system, the shaft system includes an intermediate shaft 2, a tail shaft 3, an intermediate shaft flange 4, a tail shaft flange 5 and a hydraulic bolt 6, a propeller 7 is installed at one end of the tail shaft, and a tail shaft flange is provided at the other end, an intermediate shaft flange is provided at one end of the intermediate shaft, and the shaft-driven generator is connected at the other end, the intermediate shaft flange and the tail shaft flange are detachably connected by hydraulic bolts, the tail shaft and the intermediate shaft are coaxially connected, a tail bearing 8 is installed on the outer periphery of the tail shaft, and an intermediate bearing 9 is installed on the outer periphery of the intermediate shaft, and the shaft-driven generator shore wall test method includes the following steps:

[0033] Step 1, use a hydraulic tool to loosen the hydraulic bolts connecting the intermediate shaft flange and the tail shaft flange; Step 2, install a disengagement fixture on the periphery of the tail shaft, the disengagement fixture includes two adjustment bases 10 symmetrically distributed on both sides of the tail shaft, and also includes a clamp 11 arranged around the periphery of the tail shaft, and a clamping bolt hole and a displacement bolt hole 12 are respectively provided on both sides of the clamp, the clamping bolt hole is opened in the vertical direction, and the displacement bolt hole is opened along the length direction of the tail shaft. The bottom of the adjustment base is welded and fixed to the hull, and the top of the adjustment base is opened along the length direction of the tail shaft. The displacement bolt hole and the fixing bolt hole on the same side are connected through an adjusting bolt 13, and a first nut 14 and a second nut 15 are provided at one end of the adjusting bolt close to the fixing bolt hole, and a third nut 16 and a fourth nut 17 are provided at one end of the adjusting bolt close to the displacement bolt hole;

[0034] Step 3: Use the disengagement fixture to translate the tail shaft and the propeller connected to the tail shaft backward by 3 cm;

[0035] Step 4, start the main engine 18, drive the shaft generator through the main engine to perform a load test, adjust the corresponding control parameters according to the propeller-free mode, and adjust the overspeed protection from 10% to 5%; Step 5, after the load test is completed, use the disengagement fixture to translate the tail shaft and the propeller connected to the tail shaft forward until the intermediate shaft flange and the tail shaft flange are docked;

[0036] Step 6: Use a hydraulic tool to tighten the hydraulic bolts connecting the intermediate shaft flange and the tail shaft flange to complete the reset of the ship's shafting.

[0037] The method for disengaging the fixing device comprises the following steps:

[0038] Step 1, install the clamp on the outer periphery of the tail shaft, and use the fastening bolts 19 to press the inner side of the clamp to the outer periphery of the tail shaft along the clamping bolt holes;

[0039] Step 2: Weld fixed adjustment bases on the hull on both sides of the tail shaft according to the position of the clamp, the adjustment base is located between the clamp and the propeller, the displacement bolt hole on the same side corresponds to the fixing bolt hole, the adjustment bolt is passed through between the displacement bolt hole and the fixing bolt hole on the same side, and the first nut and the second nut are respectively installed on the adjustment bolts on both sides of the fixing bolt hole, and the third nut and the fourth nut are respectively installed on the adjustment bolts on both sides of the displacement bolt hole;

[0040] Step 3, tighten and fix the first nut and the second nut on both sides of the fixing bolt hole, loosen the third nut from one side of the displacement bolt hole and keep it away from the displacement bolt hole;

[0041] Step 4, tighten the fourth nut, push the clamp with the fourth nut to drive the tail shaft and propeller to move backward, the translation distance is greater than 1 cm, and the third nut is locked after translation into place;

[0042] Step 5: After the test is completed, first loosen the fourth nut to keep a distance from the displacement bolt hole, then tighten the third nut, and drive the tail shaft and propeller to move forward by pushing the clamp into the third nut until the tail shaft flange and the intermediate shaft flange are docked;

[0043] Step 6, loosen the first nut, the second nut, the third nut and the fourth nut, remove the adjusting bolt, remove the clamp from the tail shaft, and cut the two adjusting bases off the hull.

[0044] The above description shows and describes the preferred embodiments of the present invention. As mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A large container ship shaft generator quayside test method, wherein the shaft generator is connected to the ship shaft system, the shaft system comprises an intermediate shaft, a tail shaft, an intermediate shaft flange, a tail shaft flange and hydraulic bolts, one end of the tail shaft is provided with a propeller, and the other end is provided with a tail shaft flange, one end of the intermediate shaft is provided with an intermediate shaft flange, and the other end is connected to the shaft generator, and the intermediate shaft flange and the tail shaft flange are detachably connected by hydraulic bolts, characterized in that: The following steps are involved: Step 1: Use a hydraulic tool to loosen the hydraulic bolts connecting the intermediate shaft flange and the tail shaft flange; Step 2, installing a disengagement fixture on the outer periphery of the tail shaft; Step 3: Use the disengagement fixture to translate the tail shaft and the propeller connected to the tail shaft backwards, with the translation distance being greater than 1 cm; Step 4, start the main engine and drive the shaft generator through the main engine to perform a load test; Step 5: After the test is completed, use the disengagement fixture to translate the tail shaft and the propeller connected to the tail shaft forward until the intermediate shaft flange and the tail shaft flange are docked; Step 6: Use a hydraulic tool to tighten the hydraulic bolts connecting the intermediate shaft flange and the tail shaft flange to complete the reset of the ship's shafting.

2. A large container ship shaft generator quay wall test method according to claim 1, characterized in that: In step 3, the disengagement and fixing device includes two adjustment bases symmetrically distributed on both sides of the tail shaft, and also includes a clamp arranged around the outer periphery of the tail shaft, and a clamping bolt hole and a displacement bolt hole are respectively provided on both sides of the clamp, the clamping bolt hole is opened in the vertical direction, and the displacement bolt hole is opened along the length direction of the tail shaft, the bottom of the adjustment base is fixedly connected to the hull, and the top of the adjustment base is provided with a fixing bolt hole along the length direction of the tail shaft, the displacement bolt hole and the fixing bolt hole on the same side are connected through the adjusting bolt, and a first nut and a second nut are provided at one end of the adjusting bolt close to the fixing bolt hole, and a third nut and a fourth nut are provided at one end of the adjusting bolt close to the displacement bolt hole.

3. A large container ship shaft generator quay wall test method according to claim 2, characterized in that: The method for disengaging the fixing device comprises the following steps: Step 1: Install the clamp on the outer periphery of the tail shaft, and use the fastening bolts to press the inner side of the clamp to the outer periphery of the tail shaft along the tightening bolt holes; Step 2: Weld fixed adjustment bases on the hull on both sides of the tail shaft according to the position of the clamp, the adjustment base is located between the clamp and the propeller, the displacement bolt hole on the same side corresponds to the fixing bolt hole, the adjustment bolt is passed through between the displacement bolt hole and the fixing bolt hole on the same side, and the first nut and the second nut are respectively installed on the adjustment bolts on both sides of the fixing bolt hole, and the third nut and the fourth nut are respectively installed on the adjustment bolts on both sides of the displacement bolt hole; Step 3, tighten and fix the first nut and the second nut on both sides of the fixing bolt hole, loosen the third nut from one side of the displacement bolt hole and keep it away from the displacement bolt hole; Step 4, tighten the fourth nut, push the clamp with the fourth nut to drive the tail shaft and propeller to move backward, the translation distance is greater than 1 cm, and the third nut is locked after translation into place; Step 5: After the test is completed, first loosen the fourth nut to keep a distance from the displacement bolt hole, then tighten the third nut, and drive the tail shaft and propeller to move forward by pushing the clamp into the third nut until the tail shaft flange and the intermediate shaft flange are docked; Step 6, loosen the first nut, the second nut, the third nut and the fourth nut, remove the adjusting bolt, remove the clamp from the tail shaft, and cut the two adjusting bases off the hull.

4. A large container ship shaft generator quayside test method according to claim 1, characterized in that: The tail shaft is coaxially connected with the intermediate shaft. A tail bearing is arranged on the outer periphery of the tail shaft, and an intermediate bearing is arranged on the outer periphery of the intermediate shaft.

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