Resleeving lifting balancing device with flange crankshaft

Abstract

The utility model relates to the technical field of crankshaft hoisting, in particular to a re-sleeving hoisting balancing device with a flanged crankshaft, which comprises a balancing rod with one end being a counterweight end and provided with a counterweight block; the other end is a positioning end provided with a positioning hole; one end of the double-thread screw rod is a connecting end and is connected with the positioning end of the balance rod, the double-thread screw rod is in threaded connection with the positioning end of the balance rod through the positioning hole, and the balance rod is vertically connected with the double-thread screw rod; the other end of the locking rod is a locking end so as to keep the vertical state of the double-thread screw and the horizontal state of the balance rod during working; the lifting balancing device is provided with the balancing rod and the double-thread screw, after the balancing rod is inserted into the crank opening, the double-thread screw is inserted into the center hole of the main journal, one end of the balancing rod is connected with the balancing rod, the other end of the balancing rod locks the double-thread screw, locking of the positioning end of the balancing rod is achieved, and then under the cooperation of the balancing weight on the balancing rod, the double-thread screw is locked. Leveling of the crankshaft with the flange can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshaft hoisting, and particularly relates to a compound sleeve lifting balance device for a flange crankshaft. Background Art

[0002] In the shipbuilding industry, when the crankshaft crank of a diesel engine is compound-sleeved, the single-sleeve component needs to be adjusted to a vertical state and then hoisted and assembled.

[0003] The Chinese invention patent with the publication number CN106115458B discloses a balance device for compound-sleeving a low-speed diesel engine crankshaft, which includes a balance crossbeam and a centering mechanism. The lower end of the centering mechanism is connected to a lifting rod, the left side of the balance crossbeam is connected to a counterweight block, and a fine-tuning mechanism drives the counterweight block to move left and right on the balance crossbeam. By adjusting the position of the counterweight block through the fine-tuning mechanism, the longitudinal leveling of the crankshaft can be achieved; the left and right directions of the crankshaft are leveled by adjusting bolts on the wire sling.

[0004] The Chinese invention patent with the publication number CN114620604A discloses a counterweight hoisting method for crankshaft shrink fitting. A crank web pressure bar is inserted into the inner opening of the crank web of the crankshaft to be hoisted and compound-sleeved. A counterweight bar in the same direction as the crank web is arranged at the top end of the compound-sleeved crank web. Corresponding counterweight blocks are configured according to the pre-simulated counterweight position and quantity. Sling straps are respectively connected to the counterweight end of the counterweight bar and both ends of the crank web pressure bar, and horizontal pre-adjustment in the X and Y axes is carried out through the hoisting winches on the sling straps; the trial hoisting is carried out, and the length and weight of the counterweight blocks are adjusted according to the actual counterweight situation. After the adjustment is completed, the final hoisting is carried out.

[0005] The crankshaft compound sleeves of the above two patents are both conventional single-sleeve components, including components such as crank webs and main journals. However, in some special cases, the crankshaft to be compound-sleeved is added with a flange shaft part. For example, Figure 1 As shown, since the inside of the flange shaft cannot be inserted, the original hoisting device is no longer applicable. Utility Model Content

[0006] The purpose of the utility model is to provide a compound sleeve lifting balance device for a flange crankshaft, which can achieve the leveling of the flange crankshaft through the cooperation of a balance rod and a double-headed screw. To achieve the above purpose, the utility model is solved by the following technical solutions:

[0007] The utility model provides a compound sleeve lifting balance device for a flange crankshaft, including:

[0008] A balance rod, one end is a counterweight end, provided with a counterweight block; the other end is a positioning end, provided with a positioning hole;

[0009] The double-headed screw has a connecting end at one end which is connected to the positioning end of the balance rod. It is threadedly connected through the positioning hole, and the balance rod is perpendicularly connected to the double-headed screw. The other end is a locking end to maintain the vertical state of the double-headed screw and the horizontal state of the balance rod during operation.

[0010] As a further technical solution, two stoppers are provided at the counterweight end of the balance rod, and the counterweight block is placed between the two stoppers.

[0011] As a further technical solution, the distance between the two stoppers is greater than the thickness of the counterweight block, and bolts for pressing the counterweight block are provided on the two stoppers.

[0012] As a further technical solution, the balance rod is of a square frame structure.

[0013] As a further technical solution, a gasket is provided at the locking end of the double-headed screw, and the gasket is in a stepped shape. The small end of the step of the gasket can be fitted with the central hole of the main journal, and the diameter of the large end of the step is larger than the diameter of the central hole of the main journal.

[0014] As a further technical solution, a positioning disc is provided at the lower side connection of the double-headed screw and the balance rod. The positioning disc is threadedly connected to the double-headed screw, and the positioning disc can be fitted with the central hole of the main journal.

[0015] As a further technical solution, it further includes a flange sling connected to the crane, and the flange sling has at least three flange clamps.

[0016] The beneficial effects of the above-mentioned present utility model are as follows:

[0017] (1) In the hoisting balance device of the present utility model, a balance rod and a double-headed screw are provided. After the balance rod is inserted into the crank opening, the double-headed screw is inserted into the central hole of the main journal. One end is connected to the balance rod, and the other end locks the double-headed screw to realize the locking of the positioning end of the balance rod. Then, with the cooperation of the counterweight block on the balance rod, the leveling of the flange crankshaft can be realized.

[0018] (2) Since the diameter of the central hole is larger than the diameter of the double-headed screw, in order to ensure that the positioning hole of the balance rod is concentric with the central hole, the positioning disc provided in this embodiment can be fitted with the central hole. At the same time, a stepped gasket is provided at the locking end of the double-headed screw, which restricts the movement of the double-headed screw, thereby playing a role in positioning the balance rod.

[0019] (3) The distance between the two stoppers provided on the balance rod of the present utility model is set to be greater than the thickness of the counterweight block. Threaded holes are provided on the two stoppers, and bolts are configured for the threaded holes. The bolts can not only press the counterweight block, but also finely adjust the position of the counterweight block on the balance rod by adjusting the bolts on the two stoppers. Description of the Drawings

[0020] The accompanying drawings forming a part of this utility model are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute a limitation to the utility model. It should also be understood that these drawings are shown for simplicity and clarity and are not necessarily drawn to scale. The utility model will now be described and explained with additional features and details by using the drawings, wherein:

[0021] Figure 1 A schematic structural view of the crankshaft in an embodiment of the utility model is shown;

[0022] Figure 2 A working schematic view of the double-sleeve lifting balance device in an embodiment of the utility model is shown;

[0023] Figure 3 Shown is Figure 2 The partial enlarged view at position A in

[0024] Figure 4 A schematic structural view of the balance rod in an embodiment of the utility model is shown;

[0025] Figure 5 A sectional view of the balance rod in an embodiment of the utility model is shown;

[0026] Figure 6 A schematic structural view of the double-headed screw in an embodiment of the utility model is shown;

[0027] Figure 7 A schematic view of the hoisting state of the flange sling in an embodiment of the utility model is shown.

[0028] In the figures: 1, crankshaft; 11, flange; 12, flange shaft; 13, crank; 14, main journal; 15, central hole; 2, flange sling; 21, flange clamp; 22, turnbuckle; 23, shackle; 24, steel wire rope; 25, tripod; 3, balance rod; 31, first stop block; 32, second stop block; 4, counterweight; 5, double-headed screw; 6, gasket; 7, positioning disc. Detailed implementation manners

[0029] Next, the technical solutions in the typical embodiments of the utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the utility model.

[0030] As Figure 1 shown, compared with the crankshaft double sleeve in the prior art, the single sleeve components are increased with structures such as the flange 11 and the flange shaft 12. The existing lifting balance device is no longer applicable. For this reason, this embodiment provides a double-sleeve lifting balance device for a crankshaft with a flange, as Figure 2 and Figure 3As shown, it includes a balance bar 3, a double-headed screw 5, and a flange fixture 2.

[0031] As Figure 2 and Figure 4 shown, one end of the balance bar 3 is a counterweight end, provided with a counterweight block 4; a limiting structure for the counterweight block 4 is provided on the counterweight end. In this embodiment, two stoppers are set as the limiting structure, namely a first stopper 31 and a second stopper 32. The two stoppers serve as the limiting structure for the counterweight block 4. The weight, quantity, and position of the stoppers of the counterweight block 4 are calculated in advance according to the weight of the crankshaft.

[0032] During the lifting process, there may be errors in the weight of the counterweight block 4 calculated in advance. For adjustment, the distance between the two stoppers is set to be greater than the thickness of the counterweight block 4. Such a setting not only facilitates the placement of the counterweight block 4 but also reserves a gap for the left and right movement of the counterweight block. As Figure 5 shown, since the distance between the two stoppers is large, threaded holes are provided on the two stoppers, and bolts are configured for the threaded holes. The bolts can not only press the counterweight block 4 but also finely adjust the position of the counterweight block on the balance bar 3 by adjusting the bolts on the two stoppers, thereby achieving the effect of correcting certain errors.

[0033] As Figure 5 shown, the balance bar 3 is a square frame structure. Of course, it can be understood that the balance bar 3 is not limited to the structure in this embodiment, and any rod structure that can meet the requirements is acceptable. The cross-sectional height of the balance bar 3 should be less than the distance between the crank openings to ensure that the balance bar 3 can be smoothly inserted into the crank openings. The other end of the balance bar 3 is a positioning end, provided with a positioning hole. During operation, the positioning end is inserted into the crank opening. After being inserted into the crank opening, it is necessary to ensure that the position of the positioning hole is concentric with the central hole 15 of the main journal 14, as Figure 3 shown. In this embodiment, the positioning hole is a threaded hole.

[0034] As Figure 3 and Figure 6 shown, both ends of the double-headed screw 5 are provided with threads. During use, it is inserted into the central hole 15 of the main journal 14. One end is a connection end and is connected to the positioning end of the balance bar 3 through threaded connection of the positioning hole, and the balance bar 3 is perpendicularly connected to the double-headed screw 5; the other end is a locking end to maintain the vertical state of the double-headed screw 5 and the horizontal state of the balance bar 3 during operation.

[0035] The lifting balance device in this embodiment is provided with a balance bar 3 and a double-headed screw 7. After the balance bar 3 is inserted into the crank opening, the double-headed screw 7 is inserted into the central hole 15 of the main journal 14, one end is connected to the balance bar 3, and the other end locks the double-headed screw 7 to realize the locking of the positioning end of the balance bar 3. Then, with the cooperation of the counterweight block 4 on the balance bar 3, the leveling of the flange crankshaft can be achieved.

[0036] As Figure 3As shown, a gasket 6 is provided at the locking end of the double-headed screw 5, and the gasket 6 is stepped; the small end of the step of the gasket 6 can be fitted with the central hole 15 of the main journal 14, and the diameter of the large end of the step is larger than the diameter of the central hole 15 of the main journal 14.

[0037] As Figure 3 , Figure 4 and Figure 5 shown, a positioning disc 7 is provided at the connection between the lower side of the double-headed screw 5 and the balance rod 3. The positioning disc 7 is threadedly connected to the double-headed screw 5, and the positioning disc 7 can be fitted with the central hole 15 of the main journal 14.

[0038] Since the diameter of the central hole 15 is larger than the diameter of the double-headed screw 5, in order to ensure that the positioning hole of the balance rod 3 is concentric with the central hole 15, the positioning disc 7 provided in this embodiment can be fitted with the central hole 15. At the same time, a stepped gasket 6 is provided at the locking end of the double-headed screw 5, which restricts the movement of the double-headed screw 5, thereby playing a role in positioning the balance rod 3.

[0039] As Figure 7 shown, the double-sheath lifting balance device of this embodiment further includes a flange sling 2 connected to the crane. The flange sling 2 can adopt the structure in the prior art. For a better understanding of the structure of the flange sling 2 in this embodiment, the flange sling 2 in the prior art will be briefly described below.

[0040] The flange sling 2 has at least three flange clamps 21, which are evenly clamped around the circumference of the flange 11 during operation to maintain balanced clamping. In this embodiment, three flange clamps 21 are provided, and a C-type clamp in the prior art can be used. A tripod 25 is provided above the flange clamp 21, and the corners of the tripod 25 are connected to the flange clamp 21 through turnbuckles 22. The turnbuckle 22 can be telescoped by screwing, and can be used to assist in leveling the crankshaft with a flange. The tripod 25 is connected to a steel wire rope 24, and the steel wire rope 24 is connected to the crane. In order to facilitate disassembly, a shackle 23 is provided between the turnbuckle 22 and the flange clamp 21.

[0041] During use: Insert the balance rod 3 into the crank opening along the crank direction, place the positioning disc 7 in the central hole 15, sequentially insert the double-headed screw into the positioning hole of the positioning disc 7 and the balance rod 3, install a nut at the upper end, install a gasket 6 and a nut at the lower end, and place the small end of the gasket in the central hole 15. Install the counterweight 4 between the two blocks of the balance rod 3, and install screws in the screw holes of the blocks to fix the counterweight 4. Use three flange clamps 2 on the flange 11 to lift the entire component, and through the counterweight of the counterweight 4, make the overall center on the axis of the shaft, achieve the axis vertical, and perform double-sheath.

[0042] Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make possible changes and modifications to the technical solution of the present utility model without departing from the spirit and scope of the present utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall fall within the protection scope of the technical solution of the present utility model.

Claims

1. A double-sheath lifting balance device with a flanged crankshaft, characterized in that, Including: A balance bar, one end is a counterweight end provided with a counterweight block; the other end is a positioning end provided with a positioning hole; A double-headed screw, one end is a connection end and is connected to the positioning end of the balance bar, and is threadedly connected through the positioning hole, and the balance bar is vertically connected to the double-headed screw; the other end is a locking end to maintain the vertical state of the double-headed screw and the horizontal state of the balance bar during operation; a gasket is provided at the locking end of the double-headed screw, and the gasket is in a stepped shape; the small end of the step of the gasket can be fitted with the central hole of the main journal, and the diameter of the large end of the step is larger than the diameter of the central hole of the main journal; a positioning disk is provided at the connection between the lower side of the double-headed screw and the balance bar, the positioning disk is threadedly connected to the double-headed screw, and the positioning disk can be fitted with the central hole of the main journal.

2. The double-sheath lifting balance device with a flanged crankshaft according to claim 1, wherein Two stoppers are provided at the counterweight end of the balance bar, and the counterweight block is placed between the two stoppers.

3. The double-sheath lifting balance device with a flanged crankshaft as described in claim 2, characterized in that, The distance between the two stoppers is greater than the thickness of the counterweight block, and bolts for pressing the counterweight block are provided on the two stoppers.

4. The double-sheath lifting balance device with a flanged crankshaft according to claim 1, characterized in that, The balance bar is of a square frame structure.

5. A double-sheath lifting balance device with a flanged crankshaft according to any one of claims 1-4, characterized in that, It further includes a flange sling connected to the crane, and the flange sling has at least three flange clamps.

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