Shaft centering device

Abstract

The utility model provides a shaft centering device which comprises two single-meter shaft centering tools which are arranged at an included angle of 180 degrees, each single-meter shaft centering tool comprises a pair wheel matching chassis, a dial indicator frame and a turning handle, the turning handles are evenly arranged in the circumferential direction of the pair wheel matching chassis, the dial indicator frames are fixedly arranged on the pair wheel matching chassis, and the dial indicator frames are fixedly arranged on the pair wheel matching chassis. The dial indicator frame is connected with a dial indicator fixing rod, the dial indicator fixing rod is vertically downward, and a dial indicator is installed on the dial indicator fixing rod. The shaft centering device is fixed through the dial indicator frame and the coupling wheel matched with the chassis, and shaking of the dial indicator frame in the turning process is avoided. The dial indicator on the dial indicator frame rotates along with the rotation of the jigger handle, after the coupling matching chassis and the coupling of the unit are installed through the bolt, the coupling matching chassis and the rotor of the unit keep the same concentricity all the time, and the phenomena that in the shaft centering process of the unit, due to uneven stress, data are inaccurate due to the fact that a centering tool is repeatedly dismantled when the shaft end distance is measured are avoided; and the measurement of the shaft end distance is not influenced after turning.

Description

Technical Field

[0001] The utility model belongs to the technical field of shaft alignment of rotating equipment, and particularly relates to a shaft alignment device. Background Art

[0002] During the installation and maintenance construction of petrochemical plants, rotating equipment plays a very important role in petrochemical plants, has a significant impact on the operation of the entire plant, and is usually a key equipment in petrochemical plants, such as centrifugal pumps, compressors, etc. They are responsible for transporting, compressing, and processing various fluids and gases to ensure the normal progress of the production process. As the core of the production process, efficiently operating rotating equipment can improve production efficiency, meet production requirements, and ensure the quality and output of products. At the same time, the stability and reliability of rotating equipment are crucial for the safe operation of the plant, and good maintenance and servicing of rotating equipment can extend the equipment life, reduce the downtime due to failures, and improve the availability of the plant. In order to ensure the correct alignment of the shaft system of rotating equipment, currently, two tools are usually used for shaft alignment. The first is to use a laser alignment instrument for shaft alignment, and the second is to use a dial indicator stand for shaft alignment.

[0003] Patent 202410024702.7 discloses "a shaft alignment device and method for a large compressor". The device includes a base, a laser light source, and a support frame arranged on the base. A slide rail is provided on the vertical side of the support frame. Left and right support rods are respectively provided on the left and right sides of the support frame, and the bottom ends of the left and right support rods can be respectively rotatably hinged to the base. The top ends of the left and right support rods can be respectively rotatably hinged to the two side surfaces of the support frame. The left and right support rods are both telescopic adjustment rods; the laser light source is fixed on a walking support plate, and both ends of the walking support plate can be set to walk on the slide rail. Through the adjustment of the left and right support rods and the adjustment and support of the walking support plate for the laser light source, the present invention realizes the adjustment and control of the position coordinates and inclination angle of the final laser light source, and thus realizes the precise alignment of the main shaft of the compressor. This method is the above-mentioned first method, that is, using a laser alignment instrument for shaft alignment. It not only has a high cost, but also often occurs that the battery power is insufficient and the measurement data is lost during the shaft alignment process, thus unable to meet the on-site requirements. Moreover, it is impossible to measure the shaft end distance during the shaft alignment process.

[0004] When the second method uses a dial indicator stand to turn the shaft by external force, since the dial indicator stands currently used in the market are basically magnetic base type, the dial rod is thin and the magnetism sometimes fails. During the alignment process of equipment with a long shaft end distance, due to large deflection, shaking of the magnetic adsorption position, etc., the measured values are inaccurate. During the use process, problems such as the shaking of the dial indicator stand often occur, resulting in low work efficiency, complex operation, low labor efficiency, and it is also impossible to measure the shaft end distance during the shaft alignment process. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a shaft alignment device to overcome the above technical problems existing in the prior art.

[0006] For this reason, the technical solution provided by the present utility model is as follows:

[0007] A shaft alignment device includes two single-gauge shaft alignment tools arranged at an included angle of 180°. The single-gauge shaft alignment tool includes a coupling mating chassis, a dial indicator bracket, and a turning handle. The turning handles are evenly arranged circumferentially along the coupling mating chassis. The dial indicator bracket is fixedly arranged on the coupling mating chassis. A dial indicator fixing rod is connected to the dial indicator bracket. The dial indicator fixing rod extends vertically downward, and a dial indicator is installed on the dial indicator fixing rod.

[0008] The dial indicator bracket is a right triangle. One right side of the right triangle is the base. The base is fixedly arranged on the coupling mating chassis and passes through the center of the coupling mating chassis. The dial indicator fixing rod is arranged at the acute angle opposite the base.

[0009] It further includes a stress prevention auxiliary stay bar I. The stress prevention auxiliary stay bar I is fixedly arranged on the dial indicator bracket. The stress prevention auxiliary stay bar I extends from the base to the acute angle opposite the base and is symmetrically arranged on both sides.

[0010] It further includes a shaft end distance measurement point. The coupling mating chassis is annular. A plurality of shaft end distance measurement points are evenly distributed circumferentially on the coupling mating chassis. The shaft end distance measurement points are semi-circular notches.

[0011] A stress prevention auxiliary stay bar II is arranged on the coupling mating chassis. The stress prevention auxiliary stay bar II is symmetrically distributed along the axis and intersects at the axis.

[0012] The turning handle, the dial indicator fixing rod, the stress prevention auxiliary stay bar I, the stress prevention auxiliary stay bar II, and the dial indicator bracket are all made of carbon steel.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The shaft alignment device provided by the present utility model is fixed by the dial indicator bracket and the coupling mating chassis, avoiding the shaking of the dial indicator bracket during the turning process. The dial indicator on the dial indicator bracket rotates with the rotation of the turning handle. After the coupling mating chassis and the unit coupling are installed by bolts, they always maintain the same concentricity with the unit rotor, avoiding phenomena such as inaccurate data caused by uneven stress during the shaft alignment process of the unit and repeated removal of the alignment tool when measuring the shaft end distance; and it does not affect the measurement of the shaft end distance after turning.

[0015] This shaft alignment device not only solves the problems of lost measurement data and inaccurate accuracy encountered in current work, but also can measure the shaft end distance while aligning during work, avoiding repeated work caused by changes in the shaft end distance during shaft alignment of large units, etc., improving work efficiency, being easy to operate, and improving labor efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0017] Figure 2 is a schematic structural diagram of an embodiment of the coupling chassis;

[0018] Figure 3 is a schematic diagram of an on-site implementation of the present invention;

[0019] Figure 4 is a schematic diagram of the alignment of the equipment coupling in the embodiment;

[0020] Figure 5 is a schematic diagram of the alignment of the motor coupling in the embodiment.

[0021] In the figure: 1, shaft end distance measurement point; 2, turning handle; 3, dial indicator fixing rod; 4, bolt hole; 5, anti-stress auxiliary stay bar 1; 6, dial indicator stand; 7, coupling chassis; 8, dial indicator; 9, anti-stress auxiliary stay bar 2; 10, coupling. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following specific embodiments illustrate the implementation manners of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0023] Now refer to the accompanying drawings to introduce the exemplary embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely, and to fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary embodiments shown in the drawings are not limitations on the present invention. In the drawings, the same units / components use the same reference numerals.

[0024] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the ordinary meaning understood by those skilled in the art. In addition, it can be understood that the terms defined in the commonly used dictionary should be understood to have a meaning consistent with the context of their related fields, and should not be understood as idealized or overly formal meanings.

[0025] Embodiment 1

[0026] The present utility model provides an axial alignment device, as Figure 1 shown, which includes two single - gauge axial alignment tools arranged at an included angle of 180°. The single - gauge axial alignment tool includes a coupling - mating chassis 7, a dial - indicator holder 6, and a turning handle 2. The turning handles 2 are evenly arranged along the circumferential direction of the coupling - mating chassis 7. The dial - indicator holder 6 is fixedly arranged on the coupling - mating chassis 7. A dial - indicator fixing rod 3 is connected to the dial - indicator holder 6. The dial - indicator fixing rod 3 is vertically downward, and a dial - indicator 8 is installed on the dial - indicator fixing rod 3.

[0027] Alignment principle:

[0028] Taking the alignment of a compressor set as an example, as Figure 2 shown, bolt holes 4 are provided on the coupling - mating chassis 7. The coupling - mating chassis 7 is fixed to the coupling 10 of a large - scale compressor set at the construction site through the bolt holes 4 (as Figure 3 shown). The adjustment of the coaxiality of the coupling 10 can be divided into two steps. The first step is to adjust the axial clearance to make the two shafts parallel, and the second step is to adjust the radial clearance to make the two shafts concentric.

[0029] During alignment, the two rotors are turned synchronously, and no rigid connection is allowed between the two rotors. The dial - indicator 8 is fixed reliably. When the coupling 10 rotates one week and returns to the original position, the reading of the radial dial - indicator 8 should be able to return to the original value.

[0030] The coupling is divided every 90°. After rotating 90° or 180° along the normal rotation direction of the compressor, readings are taken and recorded; the measuring - point positions of the two half - couplings should be aligned and unchanged. When finding concentricity, two dial - indicators 8 detect the axial condition of the coupling 10, and one dial - indicator 8 detects the radial condition of the coupling 10. This method can eliminate the deviation caused by the axial movement of the equipment and the motor rotor. The obtained values are calculated by the following method. As Figure 4 shown, the rotation direction during alignment is the same as the rotation direction of the motor. When turning the two rotors synchronously, the vertical directions of the equipment coupling 10 are a1 and a3; as Figure 5 shown, the vertical directions of the motor coupling 10 are b1 and b3. After obtaining four groups of data, [(a1 + b1)-(a3 + b3)] is calculated and then divided by 2 to obtain the axial deviation of the two couplings 10.

[0031] Embodiment 2

[0032] Based on Embodiment 1, the present embodiment provides an axial alignment device. The dial - indicator holder 6 is a right - angled triangle. One right - angled side of the right - angled triangle is the base, and the base is fixedly arranged on the coupling - mating chassis 7 and passes through the center of the coupling - mating chassis 7. The dial - indicator fixing rod 3 is arranged at the acute angle opposite to the base.

[0033] The dial indicator 8 on the dial indicator bracket 6 of the shaft alignment device rotates as the barring handle 2 rotates. After the coupling mating chassis 7 and the unit coupling are installed through bolts, they maintain the same concentricity with the unit rotor at all times, avoiding phenomena such as inaccurate data caused by uneven stress during the shaft alignment process and repeated removal of the alignment tool when measuring the shaft end distance.

[0034] Embodiment 3

[0035] Based on Embodiment 1, this embodiment provides a shaft alignment device, which further includes a stress prevention auxiliary stay bar 1. The stress prevention auxiliary stay bar 1 is fixedly arranged on the dial indicator bracket 6. The stress prevention auxiliary stay bar 1 extends from the bottom edge to the acute angle opposite the bottom edge and is symmetrically arranged on both sides.

[0036] As Figure 1 shown, by setting the stress prevention auxiliary stay bar 1, the deformation or fracture of the dial indicator bracket 6 can be prevented.

[0037] Embodiment 4

[0038] Based on Embodiment 1, this embodiment provides a shaft alignment device, which further includes a shaft end distance measurement point 1. The coupling mating chassis 7 is circular ring-shaped, and a plurality of shaft end distance measurement points 1 are circumferentially and evenly distributed on the coupling mating chassis 7. The shaft end distance measurement point 1 is a semi-circular notch.

[0039] As Figure 2 shown, the coupling mating chassis 7 is a hollow disk. The shaft end distance can be measured through the shaft end distance measurement point 1 corresponding to the coupling mating chassis 7 in the two single-gauge shaft alignment tools. The setting of the shaft end distance measurement point 1 can achieve that the shaft alignment tool does not need to be repeatedly removed during the shaft alignment operation.

[0040] The present utility model realizes portable barring through the barring handle 2, records while barring during the alignment process, ensures the authenticity and reliability of the shaft alignment data, and can effectively control the change of the influence of temperature on the unit due to the long shaft alignment time.

[0041] Embodiment 5

[0042] Based on Embodiment 1, this embodiment provides a shaft alignment device, and a stress prevention auxiliary stay bar 2 is arranged on the coupling mating chassis 7. The stress prevention auxiliary stay bar 2 is symmetrically distributed along the axis and intersects at the axis.

[0043] As Figure 2 shown, the stress prevention auxiliary stay bar 2 is used to prevent the deformation or fracture of the coupling mating chassis 7.

[0044] Among them, the barring handle 2, the fixed rod 3 of the dial indicator 8, the stress prevention auxiliary stay bar, and the dial indicator bracket 6 are all connected by welding.

[0045] Embodiment 6

[0046] On the basis of Embodiment 1, this embodiment provides an axial alignment device. The barring handle 2, the fixed rod 3 of the dial indicator 8, the first stress prevention auxiliary stay bar, the second stress prevention auxiliary stay bar, and the dial indicator bracket 6 are all made of carbon steel material.

[0047] All components of this axial alignment device are made of ordinary carbon steel, with low manufacturing cost. It has a simple structure, is easy to operate, has good axial alignment effect, and can improve labor efficiency. At the same time, it is convenient to disassemble, assemble or manufacture, has a small volume, is easy to carry and transport, and can be conveniently manufactured according to the specific requirements of the construction site.

[0048] The above examples are only illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. Any design identical or similar to the present invention falls within the protection scope of the present invention.

Claims

1. An axial alignment device, characterized in that: It includes two single - gauge shaft alignment tools arranged at an included angle of 180°. The single - gauge shaft alignment tool includes a coupling - mating chassis, a dial indicator stand, and a turning handle. The turning handles are evenly arranged circumferentially along the coupling - mating chassis. The dial indicator stand is fixedly installed on the coupling - mating chassis. A dial indicator fixing rod is connected to the dial indicator stand. The dial indicator fixing rod extends vertically downward, and a dial indicator is installed on the dial indicator fixing rod.

2. The shaft alignment device according to claim 1, characterized in that: The dial indicator stand is a right - angled triangle. One of the right - angled sides of the right - angled triangle is the base. The base is fixedly installed on the coupling - mating chassis and passes through the center of the coupling - mating chassis. The dial indicator fixing rod is arranged at the acute angle opposite to the base.

3. The shaft alignment device according to claim 2, characterized in that: It also includes a stress - prevention auxiliary stay bar 1. The stress - prevention auxiliary stay bar 1 is fixedly installed on the dial indicator stand. The stress - prevention auxiliary stay bar 1 extends from the base to the acute angle opposite to the base and is symmetrically arranged on both sides.

4. The shaft alignment device according to claim 2, characterized in that: It also includes shaft - end distance measurement points. The coupling - mating chassis is circular - ring - shaped. A plurality of shaft - end distance measurement points are evenly distributed circumferentially on the coupling - mating chassis. The shaft - end distance measurement points are semi - circular notches.

5. An axial alignment device according to claim 2, characterized in that: The coupling - mating chassis is provided with a stress - prevention auxiliary stay bar 2. The stress - prevention auxiliary stay bar 2 is symmetrically distributed along the axis and intersects at the axis.

6. An axial alignment device according to any one of claims 1-5, characterized in that: The turning handle, the dial indicator fixing rod, the stress - prevention auxiliary stay bar 1, the stress - prevention auxiliary stay bar 2, and the dial indicator stand are all made of carbon steel material.

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