A transport and fixing device for diesel engine crankshafts in power stations

Abstract

The present invention belongs to the technical field of rotating equipment maintenance, and specifically relates to a crankshaft transportation and fixing device for a power station diesel engine, comprising: a crankshaft driving end fixing part, a crankshaft free end fixing part and a crankshaft body; the crankshaft driving end fixing part is connected to the driving end of the crankshaft body, and the crankshaft free end fixing part is connected to the free end of the crankshaft body; the crankshaft driving end fixing part comprises: a fixed vertical rod A, a connecting sleeve, a fixed vertical rod B, a fixed crossbeam and a fixed block; the fixed vertical rod A and the fixed vertical rod B are threadedly connected through the connecting sleeve, the fixed crossbeam penetrates into the circular through hole of the fixed block, and the fixed crossbeam is fixedly connected to the fixed vertical rod B through a nut; the crankshaft free end fixing part comprises: a fixed flange, a plurality of bolts A, bolts B, bolts C and a fixed bracket; the two fixed brackets are fixed to the two ends of the fixed flange through bolts B.

Description

Technical Field

[0001] The invention belongs to the technical field of rotating equipment maintenance, and in particular relates to a crankshaft transportation and fixing device for a diesel engine in a power station. Background Art

[0002] A diesel power station is a power station composed of several diesel-powered generator sets. It has the advantages of compact structure, high thermal efficiency, and rapid start-up and power supply. The capacity of a single unit can range from a few kilowatts to tens of thousands of kilowatts, which can meet the power supply requirements of various types of projects and process flows. Therefore, it has been widely used in various sectors of the national economy.

[0003] The working principles and forms of power station diesel engines are special and diverse. The precision and environmental requirements of parts manufacturing and assembly are high. The test work after assembly needs to be carried out on a special test bench. Therefore, the manufacturing, assembly and testing of diesel engine parts must be completed by professional manufacturers in the factory.

[0004] Diesel power plants can be roughly divided into two categories, emergency power plants and basic power plants, according to their operation and usage. Both emergency power plants and basic power plants are located near the use sites far away from the diesel engine factory.

[0005] Normally, a diesel engine is first produced, assembled and tested at the manufacturer, then transported to the site of use by car or ship, installed and debugged at the site, and finally enters the operation phase. After a certain number of years of operation, it is transported back to the manufacturer or maintenance factory for maintenance.

[0006] Whether it is automobile transportation or ship transportation, special operating conditions such as starting, stopping, accelerating, decelerating, turning, going uphill and downhill cannot be avoided during transportation. Under the above conditions, if the diesel engine crankshaft is not effectively fixed, the crankshaft bearing may be damaged by impact or vibration, which may cause abnormal wear of the crankshaft journal and oil leakage at the extended end. In severe cases, it may even cause major incidents such as bending, deformation and breakage of the crankshaft.

[0007] Therefore, it is necessary to design a power station diesel engine crankshaft transportation fixing device for effectively fixing the crankshaft during transportation of the diesel engine. Summary of the invention

[0008] The purpose of the present invention is to provide a power station diesel engine crankshaft transportation and fixing device to address the deficiencies in the prior art, which is used to solve the technical problem in the prior art that the diesel engine crankshaft cannot be effectively fixed during transportation, causing impact or vibration damage to the crankshaft bearing, and further causing abnormal wear of the crankshaft journal.

[0009] The technical solution of the present invention is:

[0010] A crankshaft transportation and fixing device for a power station diesel engine comprises: a crankshaft driving end fixing part, a crankshaft free end fixing part and a crankshaft body; the crankshaft driving end fixing part is connected to the driving end of the crankshaft body, and the crankshaft free end fixing part is connected to the free end of the crankshaft body; the crankshaft driving end fixing part comprises: a fixed vertical rod A, a connecting sleeve, a fixed vertical rod B, a fixed crossbeam and a fixed block; the fixed vertical rod A and the fixed vertical rod B are threadedly connected by the connecting sleeve, the fixed crossbeam penetrates into the circular through hole of the fixed block, and the fixed crossbeam is fixedly connected to the fixed vertical rod B by a nut; the crankshaft free end fixing part comprises: a fixing flange, a plurality of bolts A, bolts B, bolts C and a fixing bracket; the two fixing brackets are fixed to the two ends of the fixing flange by bolts B.

[0011] As mentioned above, the fixed crossbeam is a cylindrical structure; a circular through hole is opened in the middle of the fixed block, and the diameter of the circular through hole matches the diameter of the fixed crossbeam.

[0012] As mentioned above, bolt through holes are formed at both ends of the fixed cross beam, and the inner diameter of the bolt through hole matches the outer diameter of the fixed vertical rod B.

[0013] As mentioned above, the fixed vertical rod A is installed on the shock absorber at the driving end of the crankshaft body; the fixed block fixed cross beam is fixedly connected with the fixed vertical rod B by bolts and nuts.

[0014] As mentioned above, the fixing flange is in a rectangular plate-like structure as a whole, the end surface of the fixing flange is provided with a threaded blind hole, and the upper surface of the fixing flange is provided with a threaded through hole.

[0015] As mentioned above, the fixing flange is mounted on the free end of the crankshaft body.

[0016] As mentioned above, the fixing bracket is fixed to the free end cover of the crankshaft body by bolts A.

[0017] The beneficial effects of the present invention are:

[0018] (1) The fixing device designed in the present invention has a simple structure and is easy to operate, maintain, repair and store;

[0019] (2) The fixing device designed by the present invention has a reasonable structure design, which makes full use of the diesel engine body structure. The fixing device can be installed and removed by using the device without changing the diesel engine body structure itself;

[0020] (3) The fixing vertical rod of the driving end of the fixing device designed by the present invention adopts a combined connection mode of a front fixing vertical rod, a connecting sleeve and a rear fixing vertical rod, which not only shortens the length of the fixing vertical rod to avoid the possibility of large bending deformation during processing and storage, but also reduces the processing accuracy requirements of the fixing vertical rod, and at the same time reduces the difficulty coefficient of installation and removal of the fixing device at the driving end;

[0021] (4) The driving end fixing block of the fixing device designed by the present invention adopts an arc-shaped groove, which not only reduces the processing accuracy requirements but also expands the use place of the fixing device;

[0022] (5) The bolt through hole at the driving end of the fixing device designed in the present invention adopts a long strip-shaped bolt through hole, which can not only realize the connection and fixing functions through the connecting bolts, but also facilitate installation and adjustment according to the corresponding internal threaded hole position;

[0023] (6) The free end of the fixing device designed by the present invention adopts a combined connection mode of a fixing flange and a fixing bracket, which not only reduces the requirements on the steel size and processing equipment, but also reduces the difficulty coefficient of installation and removal of the device;

[0024] (7) The crankshaft transportation fixing device can effectively fix the crankshaft of the diesel engine, effectively eliminating major safety hazards such as impact or vibration damage to the crankshaft bearing, abnormal wear of the crankshaft journal and oil leakage at the extended end, and bending, deformation and breakage of the crankshaft during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the main structure of a driving end fixing device of a diesel engine crankshaft transportation fixing device designed by the present invention;

[0026] Figure 2 It is a left-side structural schematic diagram of a driving end fixing device of a diesel engine crankshaft transportation fixing device designed by the present invention;

[0027] Figure 3 This is a free end shaft view of the crankshaft body designed by the present invention;

[0028] Figure 4 The present invention is a schematic diagram of the main structure of a free end fixing device of a diesel engine crankshaft transportation fixing device for a power station designed by the present invention.

[0029] Among them: 1—fixed vertical rod A; 2—connecting sleeve; 3—fixed vertical rod B; 4—fixed crossbeam; 5—fixed block; 6—washer A; 7—nut; 8—washer B; 9—bolt A; 10—washer C; 11—bolt B; 12—fixed flange; 13—washer D; 14—bolt C; 15—fixed bracket; 16—observation hole cover; 17—washer E; 18—bolt D; 19—cover plate; 20—turning flange; 21—washer F; 22—bolt E; 23—washer G; 24—bolt F; 25—crankshaft body. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings:

[0031] A transport and fixing device for a diesel engine crankshaft in a power station comprises: a crankshaft driving end fixing portion, a crankshaft free end fixing portion and a crankshaft body 25; the crankshaft driving end fixing portion is connected to the driving end of the crankshaft body 25, and the crankshaft free end fixing portion is connected to the free end of the crankshaft body 25; the crankshaft driving end fixing portion comprises: two fixed vertical rods 1A, two connecting sleeves 2, two fixed vertical rods 3B, a fixed crossbeam 4 and two fixed blocks 5; the fixed vertical rod 1A and the fixed vertical rod 3B are threadedly connected through the connecting sleeve 2, the fixed crossbeam 4 penetrates into the circular through hole of the fixed block 5, and the fixed crossbeam 4 is fixedly connected to the fixed vertical rod 3B through a nut 7; the crankshaft free end fixing portion comprises: a fixed flange 12, a plurality of bolts A9, four bolts B11, two bolts C14 and two fixed brackets 15; the two fixed brackets 15 are fixed to both ends of the fixed flange 12 by bolts B11.

[0032] The fixed crossbeam 4 is a cylindrical structure; a circular through hole is opened in the middle of the fixed block 5, and the diameter of the circular through hole matches the diameter of the fixed crossbeam 4.

[0033] Bolt through holes are formed at both ends of the fixed cross beam 4, and the inner diameter of the bolt through holes matches the outer diameter of the fixed vertical rod 3B.

[0034] The fixed vertical rod 1A is installed on the shock absorber at the driving end of the crankshaft body; the fixed block 5 fixes the cross beam 4 and the fixed vertical rod 3B through bolts and nuts 7.

[0035] The fixing flange 12 is in the form of a rectangular plate as a whole. The end surface of the fixing flange 12 is provided with a threaded blind hole, and the upper surface of the fixing flange (12) is provided with a threaded through hole.

[0036] The fixing flange 12 is mounted on the free end of the crankshaft body.

[0037] The fixing bracket 15 is fixed to the free end cover of the crankshaft body by bolts 9A.

[0038] When the present invention is in operation, the crankshaft needs to be fixed using the transport fixing device and fixing method before the diesel engine is hoisted as a whole to a transport vehicle or ship after the diesel engine has completed testing at the manufacturer or removed from the installation at the use site. After being transported to the use site, manufacturer or maintenance plant, the transport fixing device needs to be removed.

[0039] The specific embodiments are as follows:

[0040] 1. Check and confirm that the diesel engine coupling has been removed;

[0041] 2. Open the cylinder indicator valve;

[0042] 3. Remove the washer E17, bolt D18 and the inspection hole cover 16;

[0043] 4. Install the torque amplifier to the center hole of the turning flange 20, and install the torque wrench to the center hole of the torque amplifier;

[0044] 5. Turn the torque wrench counterclockwise to turn the crankshaft until the cylinder is placed 10° (crankshaft degrees) after the ignition top dead center;

[0045] 6. Remove the torque wrench and torque amplifier, and reinstall the washer E17, bolt D18 and observation hole cover 16;

[0046] 7. Close the cylinder indicator valve;

[0047] 8. Installation and removal of the drive end fixture

[0048] (1) Apply lubricating oil to the external threads at both ends of the fixed vertical rod A1 and the fixed vertical rod B3;

[0049] (2) Install the fixed vertical rod A1 into the threaded hole of the shock absorber at the drive end of the crankshaft body;

[0050] (3) Install the connecting sleeve 2 onto the fixed vertical rod A1;

[0051] (4) Install the fixed beam 4 into the through hole of the fixed block 5;

[0052] (5) Install the fixed vertical rod B3 into the internal threaded hole of the connecting sleeve 2;

[0053] (6) Install the fixed cross beam 4 and the fixed block 5 assembly onto the fixed vertical rod B3;

[0054] (7) Adjust the position of the fixed beam 4 until the fixed block 5 contacts the end surface of the flywheel connector;

[0055] (8) Install the washer A6 and nut 7 onto the fixed vertical rod B3 and tighten the nut 7 into place using a torque wrench.

[0056] (9) After the diesel engine is transported to the place of use, the manufacturer or the maintenance factory, the drive end fixing device shall be disassembled in the reverse order of installation.

[0057] 9. Installation and removal of free end fixture

[0058] (1) Remove the washer E17, bolt D18 and the inspection hole cover 16;

[0059] (2) Remove the washer G23, bolt F24 and cover plate 19;

[0060] (3) Remove the washer F21, bolt E22 and turning flange 20;

[0061] (4) Install the fixing flange 12 into the internal threaded hole of the turning flange bolt 22 through the washer D13 and the bolt C14, and tighten it in place;

[0062] (5) Install the fixing bracket 15 onto the fixing flange 12 using the washer B8 and the bolt A9 and tighten it in place;

[0063] (6) Install the fixing bracket 15 into the internal threaded hole of the cover plate bolt 23 through the washer C10 and the bolt B11, and tighten it in place;

[0064] (7) After the diesel engine is transported to the place of use, the free end fixing device shall be disassembled in the reverse order of installation, and the turning flange 20, gasket F21, bolt E22, cover plate 19, gasket G23, bolt F24, observation hole cover 16, gasket E17 and bolt D18 shall be reinstalled in sequence.

[0065] 10. Storage of fixtures

[0066] Clean the fixture, apply anti-rust oil, wrap it with tin foil, and store it in a dedicated tool box with a desiccant.

[0067] The above embodiments are only exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited to the above embodiments. Within the scope of professional knowledge possessed by ordinary technicians in this field, the present invention can be modified or equivalently replaced without departing from the spirit and essence of the present invention, but the technical solutions and improvements thereof that do not depart from the scope of the present invention should all be included in the scope of the claims of the present invention.

Claims

1. A diesel engine crankshaft transport and fixing device for a power station, characterized in that: include: A crankshaft drive end fixing portion, a crankshaft free end fixing portion and a crankshaft body (25); the crankshaft drive end fixing portion is connected to the drive end of the crankshaft body (25), and the crankshaft free end fixing portion is connected to the free end of the crankshaft body (25); the crankshaft drive end fixing portion comprises: a fixing vertical rod A (1), a connecting sleeve (2), a fixing vertical rod B (3), a fixing crossbeam (4) and a fixing block (5); the fixing vertical rod (A1) and the fixing vertical rod B (3) are threadedly connected through the connecting sleeve (2), the fixing crossbeam (4) penetrates into a circular through hole of the fixing block (5), and the fixing crossbeam (4) and the fixing vertical rod B (3) are fixedly connected through a nut (7); the crankshaft free end fixing portion comprises: a fixing flange (12), a plurality of bolts A (9), four bolts B (11), two bolts C (14) and a fixing bracket (15); the fixing bracket (15) is fixed to both ends of the fixing flange (12) through the bolts B (11), and the fixing block adopts an arc-shaped groove form; The fixed crossbeam (4) is a cylindrical structure; a circular through hole is opened in the middle of the fixed block (5), and the diameter of the circular through hole matches the diameter of the fixed crossbeam (4); The fixed cross beam (4) has bolt through holes at both ends, and the inner diameter of the bolt through holes matches the outer diameter of the fixed vertical rod B (3); The fixed vertical rod A (1) is mounted on the crankshaft body driving end shock absorber; the fixed block (5) fixed cross beam (4) and the fixed vertical rod B (3) are fixedly connected by bolts and nuts (7); The fixing flange (12) is in the form of a rectangular plate as a whole, and a threaded blind hole is provided on the end surface of the fixing flange (12); a threaded through hole is provided on the upper surface of the fixing flange (12); The fixing flange (12) is mounted on the free end of the crankshaft body, and the fixing flange (12) is mounted into the internal threaded hole of the turning flange bolt through a washer D and a bolt C; The fixing bracket (15) is fixed to the free end cover of the crankshaft body by means of bolts A (9), and the fixing bracket (15) is installed in the cover plate bolt installation internal threaded hole by means of washers C and bolts B.

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