An assembly tool for diaphragm half coupling

Abstract

An assembly tool for a diaphragm half coupling comprises a diaphragm half coupling, which comprises a lifting platform (1), a cross slide (2), a first mounting plate (3), a second mounting plate (4), a coupling fixing seat, a heating coil (7) and an infrared emitter (8). The invention has the advantages that the assembly tool can be used by two persons to complete the installation of the coupling within five minutes, and the assembly tool is convenient, fast and easy to use.

Description

Technical Field

[0001] The invention relates to the field of mechanical equipment, and in particular to an assembly tool for a diaphragm half coupling. Background Art

[0002] At present, when using the diaphragm coupling, it needs to be interference fit or transition fit with the motor main shaft or compressor main shaft. Therefore, when assembling the coupling, there is a problem of difficulty in assembly. At present, the following two methods are often used to install the coupling. 1. Press-in method. The press-in method will damage the coupling and the main shaft surface, causing dynamic imbalance. 2. Cold shrinkage method. The cold shrinkage method is difficult to adapt to large motors or compressor main shafts. Summary of the invention

[0003] The purpose of the present invention is to provide an assembly tool for a diaphragm half coupling in view of the above-mentioned shortcomings.

[0004] The present invention comprises a diaphragm half coupling, characterized in that it comprises a lifting platform, a cross slide, a first mounting plate, a second mounting plate, a coupling fixing seat, a heating coil and an infrared emitter,

[0005] The cross slide is detachably mounted on the mounting platform of the lifting platform by bolts.

[0006] The first mounting plate is fixedly mounted on the slider of the cross slide.

[0007] The second mounting plate is detachably mounted on the first mounting plate by bolts.

[0008] The coupling fixing seat includes a U-shaped fixing plate, a first base, a U-shaped movable plate and a second base.

[0009] The first base is provided with a second base insertion area, the U-shaped fixing plate is fixedly mounted on the first base, and the first base is fixedly mounted on the second mounting plate.

[0010] The U-shaped movable plate is fixedly installed on the second base.

[0011] The second base is inserted into the second base insertion area on the first base, and a placement area for placing the diaphragm half coupling mounting plate is formed between the U-shaped fixed plate and the U-shaped movable plate.

[0012] A pair of symmetrically distributed adjustment holes are provided between the U-shaped fixed plate and the U-shaped movable plate, and the distance between the U-shaped fixed plate and the U-shaped movable plate can be adjusted by adjusting bolts.

[0013] The heating coil is mounted on the diaphragm half coupling.

[0014] The infrared transmitter is mounted on the second mounting plate through a bracket.

[0015] The lifting platform is a mobile lifting platform.

[0016] The cross slide is a screw cross slide.

[0017] The infrared transmitter is detachably mounted on the bracket.

[0018] The invention has the advantages that the coupling can be installed within five minutes by two persons through the device, which is convenient, fast and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention. DETAILED DESCRIPTION

[0020] As shown in the figure, the present invention includes a diaphragm half coupling, which is characterized in that it includes a lifting platform 1, a cross slide 2, a first mounting plate 3, a second mounting plate 4, a coupling fixing seat, a heating coil 7 and an infrared transmitter 8,

[0021] The cross slide 2 is detachably mounted on the mounting platform of the lifting platform 1 by means of bolts.

[0022] The first mounting plate 3 is fixedly mounted on the slider of the cross slide 2.

[0023] The second mounting plate 4 is detachably mounted on the first mounting plate 3 by means of bolts.

[0024] The coupling fixing seat includes a U-shaped fixing plate 5, a first base, a U-shaped movable plate 6 and a second base.

[0025] The first base is provided with a second base insertion area, the U-shaped fixing plate 5 is fixedly mounted on the first base, and the first base is fixedly mounted on the second mounting plate 4.

[0026] The U-shaped movable plate 6 is fixedly mounted on the second base.

[0027] The second base is inserted into the second base insertion area on the first base, and a placement area for placing the diaphragm half coupling mounting plate is formed between the U-shaped fixed plate 5 and the U-shaped movable plate 6.

[0028] A pair of symmetrically distributed adjustment holes are respectively provided between the U-shaped fixed plate 5 and the U-shaped movable plate 6, and the distance between the U-shaped fixed plate 5 and the U-shaped movable plate 6 is adjusted by adjusting bolts.

[0029] The heating coil 7 is mounted on the diaphragm half coupling.

[0030] The infrared transmitter 8 is mounted on the second mounting plate 4 via a bracket.

[0031] The lifting platform 1 is a mobile lifting platform 1 .

[0032] The cross slide 2 is a screw cross slide 2.

[0033] The infrared transmitter 8 is detachably mounted on the bracket.

[0034] Heating principle of heating coil 7: A strong magnetic flux with instantaneous polarity change is generated in heating coil 7. When the half coupling is placed in heating coil 7, the magnetic flux will penetrate the entire half coupling, and a corresponding large eddy current will be generated in the opposite direction of the heating current inside the half coupling. Since there is resistance in the half coupling, heat is generated, and the temperature of the half coupling rises rapidly. The hub hole of the half coupling expands and deforms under the action of temperature rise, so that the hub hole of the half coupling is enlarged so that it can be assembled with the connected parts smoothly. The heating temperature is calculated according to the interference and set requirements. The calculation formula is t=(i+Δ) / (103*a*D)+t0, where t is the temperature after heating (℃), i is the interference (μm), Δ is the clearance (mm) required for the half coupling to be freely inserted into the main shaft (to avoid scratching the surface), a is the linear expansion coefficient of the material of the half coupling -6 (10 / ℃), D is the hub hole diameter of the half coupling (mm), and t0 is the temperature at the beginning of heating (℃). The above i, D, and t0 are obtained based on the measured data. Δ directly affects the assembly time. In order to prevent the half-coupling from cooling and shrinking, the assembly time must be limited and the necessary assembly clearance must be reserved. The minimum assembly clearance Δ is selected based on empirical values, and a is selected based on the mechanical design manual.

[0035] Working method: first place the diaphragm half coupling in the placement area for placing the diaphragm half coupling mounting plate, then adjust the adjusting bolt to fix the diaphragm half coupling tightly in the placement area, then use the infrared transmitter 8, lifting platform 1 and cross screw slide 2 to make the center of the coupling and the center of the shaft to be docked at the same horizontal position, then heat the heating coil 7, expand and deform through the hub hole under the action of temperature rise, move the lifting platform 1, and start docking (docking must be completed within 1 minute), after the coupling cools down, the coupling hub hole is restored, and automatically clamped to the coupling, finally the lifting platform descends, and the half coupling leaves the placement area.

[0036] Due to expansion deformation, the docking does not need to meet high precision requirements and deviations are allowed.

[0037] The heater is electrically connected to the heating coil 7. The heating coil 7 can control the heating of the half coupling by contact heat conduction or radiation heat conduction.

[0038] The heating machine is a high-frequency heating machine. The main function of the high-frequency heating machine is to output high-frequency and large current. When connected with infrared temperature measurement, it can realize automatic temperature control.

[0039] The heating coil 7 is sleeved on the half coupling to heat the half coupling. The heating coil 7 is made of a copper tube and is connected to the high-frequency heating machine through a power line. When a high-frequency current is passed through, the half coupling is heated to expand the hub hole of the half coupling.

[0040] By replacing the second mounting plate 4 and the coupling fixing seat, couplings of different models can be used.

Claims

1. An assembly tool for a diaphragm half coupling, comprising a diaphragm half coupling, characterized in that It comprises a lifting platform (1), a cross slide (2), a first mounting plate (3), a second mounting plate (4), a coupling fixing seat, a heating coil (7) and an infrared emitter (8). The cross slide (2) is detachably mounted on the mounting platform of the lifting platform (1) by means of bolts. The first mounting plate (3) is fixedly mounted on the slider of the cross slide (2). The second mounting plate (4) is detachably mounted on the first mounting plate (3) by means of bolts. The coupling fixing seat comprises a U-shaped fixing plate (5), a first base, a U-shaped movable plate (6) and a second base. The first base is provided with a second base insertion area, the U-shaped fixing plate (5) is fixedly mounted on the first base, and the first base is fixedly mounted on the second mounting plate (4). The U-shaped movable plate (6) is fixedly mounted on the second base. The second base is inserted into the second base insertion area on the first base, and a placement area for placing the diaphragm half coupling mounting plate is formed between the U-shaped fixed plate (5) and the U-shaped movable plate (6). A pair of symmetrically distributed adjustment holes are respectively provided between the U-shaped fixed plate (5) and the U-shaped movable plate (6), and the distance between the U-shaped fixed plate (5) and the U-shaped movable plate (6) is adjusted by adjusting bolts. The heating coil (7) is mounted on the diaphragm half coupling. The infrared transmitter (8) is mounted on the second mounting plate (4) via a bracket.

2. The assembly tool for the diaphragm half coupling according to claim 1, characterized in that The lifting platform (1) is a mobile lifting platform (1).

3. The assembly tool for the diaphragm half coupling according to claim 1, characterized in that The cross slide (2) is a screw cross slide (2).

4. The assembly tool for the diaphragm half coupling according to claim 1, characterized in that The infrared transmitter (8) is detachably mounted on the bracket.

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