Shrinking device for shaft parts of marine crankshafts

Abstract

The shrinkage fit device comprises a hoisting clamping flange, a hoisting hook, connecting holes, bolts and nuts, the hoisting clamping flange is formed by combining two semicircular rings, the inner diameter size of the hoisting clamping flange is slightly larger than the size of an intermediate shaft bracket opening, and the two connecting holes are formed in the two sides of the hoisting clamping flange and used for tightening an intermediate shaft to prevent the intermediate shaft from falling off. By designing and developing the assembling device which is safe, light, convenient, high in operability and capable of meeting the requirement for shrinkage fit of crankshaft parts, the problem that in the marine crankshaft assembling process, a hanging clamp cannot be used for hoisting an intermediate shaft, and shrinkage fit assembling with the vertical precision within 0.05 mm / m cannot be carried out is solved.

Description

Technical Field

[0001] The utility model relates to the field of marine crankshaft red sleeves, and in particular to a marine crankshaft shaft red sleeve device. Background Art

[0002] Red sleeve assembly is a process for assembling large semi-assembled marine crankshafts. It is an economical and reliable connection method. Many large crankshafts that cannot be manufactured by integral casting or forging methods use the red sleeve method to connect the various parts. Red sleeve is an assembly method that uses the principle of thermal expansion and contraction of metals. After the crank red sleeve hole is heated and expanded to 1.5mm larger than the red sleeve journal size, the journal and crank are leveled, and then the journal is placed in the crank red sleeve hole. After the crank red sleeve hole cools down, the journal is tightly held.

[0003] The assembly process requires that the intermediate shaft and the corresponding crank be assembled separately first. The red sleeve hole size of the crank is heated and expanded to exceed the red sleeve journal size by 1.5mm. Then, the journal of the shaft to be assembled is facing downward and lifted vertically. Use a spirit level to adjust the intermediate shaft and the red sleeve hole on the side to be assembled to a state perpendicular to the horizontal plane (within 0.05mm / m). Slowly lift the intermediate shaft to just above the hole and slowly lower it until the assembly operation is completed.

[0004] Since the intermediate shaft is cylindrical and the size of the stop is slightly larger than the size of the journal, it is impossible to use a lifting clamp to lift the intermediate shaft and perform red set assembly with a vertical accuracy within 0.05mm / m. Summary of the invention

[0005] According to the problem that it is impossible to use a lifting clamp to lift the intermediate shaft and perform red sleeve assembly with a vertical accuracy within 0.05mm / m in the assembly of marine crankshafts, a red sleeve device for marine crankshaft shaft parts is provided. The utility model designs and develops a safe, light, and highly operable assembly device for red sleeves of crankshaft shaft parts.

[0006] The technical means adopted by the utility model are as follows:

[0007] A red sleeve device for a marine crankshaft shaft, comprising: a lifting calliper, a lifting hook, a connecting hole, a bolt, and a nut;

[0008] The lifting call is composed of two semicircular rings, the inner diameter of which is larger than the size of the intermediate shaft frame opening. Two connecting holes are arranged on both sides of the lifting call to tighten the intermediate shaft to prevent the intermediate shaft from falling off.

[0009] Furthermore, the lifting hook is welded to the lifting calliper and is provided with a through hole in the middle for installing a lifting clamp to lift the intermediate shaft.

[0010] Furthermore, the connection holes are welded at the edge positions on both sides of the lifting calliper, and a through hole is provided at the center position of the connection hole for installing bolts and nuts.

[0011] Furthermore, the bolts and nuts are used to be installed on the connecting holes to tighten the intermediate shaft to prevent the intermediate shaft from falling off.

[0012] Due to the adoption of the above technical solution, compared with the prior art, the utility model has the following advantages:

[0013] 1. The utility model provides a red sleeve device for a marine crankshaft shaft, wherein the lifting clamp is divided into two semicircular rings, which is light and convenient to transfer.

[0014] 2. The utility model provides a red sleeve device for a marine crankshaft shaft, which is convenient for the operator to operate and easy to disassemble and install.

[0015] 3. The utility model provides a red sleeve device for marine crankshaft shaft parts, which solves the difficulty of enterprises in hiring workers and reduces the labor intensity of workers.

[0016] Based on the above reasons, the utility model can be widely promoted in the field of marine crankshaft red sleeves. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 This is a schematic diagram of the structure of a red sleeve device for a marine crankshaft shaft part described in the utility model;

[0019] Figure 2 This is a schematic diagram of a lifting hook of a red sleeve device for a marine crankshaft shaft part described in the utility model;

[0020] Figure 3 This is a schematic diagram of a connecting hole of a red sleeve device for a marine crankshaft shaft part described in the utility model;

[0021] Figure 4 It is a view of the A direction of a red sleeve device for a marine crankshaft shaft part described in the utility model.

[0022] In the figure: 1. lifting call; 2. lifting hook; 3. connecting hole; 4. bolt; 5. nut. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0027] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present utility model: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0028] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0029] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0030] like Figures 1 to 4 As shown, the utility model provides a red sleeve device for a marine crankshaft shaft, comprising: a lifting call 1, a lifting hook 2, a connecting hole 3, a bolt 4, and a nut 5;

[0031] The lifting call 1 is composed of two semicircular rings, and its inner diameter is larger than the size of the intermediate shaft frame opening. Two connecting holes 3 are provided on both sides of the lifting call 1 to tighten the intermediate shaft to prevent the intermediate shaft from falling off.

[0032] Furthermore, the lifting hook 2 is welded to the lifting clamp 1 and is provided with a through hole in the middle for installing a lifting clamp to lift the intermediate shaft.

[0033] Furthermore, the connection holes 3 are welded on the edge positions on both sides of the lifting calliper 1, and a through hole is provided at the center position of the connection hole 3 for installing bolts 4 and nuts 5.

[0034] Furthermore, the bolts 4 and nuts 5 are used to be installed on the connecting hole 3 to tighten the intermediate shaft to prevent the intermediate shaft from falling off.

[0035] Furthermore, place the second side of the crank flat on three leveling shims, with two placed at the crank arm position and one placed at the crank pin position. Heat the inner surface of the crank with a heating device, and use a measuring rod to measure the size of the crank red sleeve hole. When the size of the crank red sleeve hole is heated and expanded to exceed the red sleeve journal size by 1.5mm, place the spirit level on the first side of the crank for leveling, and level it in the 90° direction with a levelness of 0.02mm / m. Use bolts 4 and nuts 5 to fix the connecting holes 3 on the two lifting callipers 1. After the crane uses a lifting clamp to lift the intermediate shaft through the lifting hook 2, place two spirit levels on the upper end face edge of the shaft parts, cross them at 90° toward the axis center, and ensure that the shaft parts have a levelness of 0.02mm / m. Lift the prepared shaft to be installed above the crank red sleeve hole and lower it to 2mm away from the crank surface. Two people control the hot-mounted shaft by hand, slowly and smoothly lower it to a depth of 30mm in the hole, and then quickly and smoothly lower it until the hot-mounted shaft is completely lowered.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A red sleeve device for a marine crankshaft shaft, characterized in that: include: Lifting hooks, lifting hooks, connection holes, bolts, nuts; The lifting call is composed of two semicircular rings, the inner diameter of which is larger than the size of the intermediate shaft frame opening. Two connecting holes are arranged on both sides of the lifting call to tighten the intermediate shaft to prevent the intermediate shaft from falling off.

2. A marine crankshaft red sleeve device according to claim 1, characterized in that: The lifting hook is welded to the lifting clamp and is provided with a through hole in the middle for installing a lifting clamp to lift the intermediate shaft.

3. A red sleeve device for a marine crankshaft according to claim 2, characterized in that: The connection holes are welded at the edge positions on both sides of the lifting calliper, and a through hole is provided at the center position of the connection hole for installing bolts and nuts.

4. A marine crankshaft red sleeve device according to claim 3, characterized in that: The bolts and nuts are used to be installed on the connecting holes to tighten the intermediate shaft to prevent it from falling off.

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