Automatic centering equipment for large-diameter shaft installation

Abstract

The invention relates to automatic centering equipment for installation of a large-diameter shaft. The centering device comprises a motor, a conveying belt, a signal receiving and transmitting device, a cross laser centering instrument, an electric hydraulic device and a centering mechanism. The centering mechanism is composed of four arc-shaped rubber pads and a telescopic arm, the arm is stretched and shortened through a guide rail block and a spring in the centering mechanism so that adjustment can be conducted according to different diameters, and a cross laser centering instrument is arranged in the center of the front end of the centering device and used for finding the center of a mounting hole; four sensors are installed on the shaft, the center position of the shaft is determined, and the center measuring instrument and the sensors transmit collected center position data into the controller so that the position of the shaft can be automatically adjusted; the base adopts an electric hydraulic device, the position can be adjusted according to the height of the mounting hole, and the operation is more convenient.

Description

Technical Field

[0001] The patented design of this invention is used for the aerial shaft centering installation of large-diameter antennas, fans and other large equipment, and specifically designs an automatic centering device for large-diameter shaft installation. Background Art

[0002] In the existing technology, whether it is installing and docking large bearings or shafts in a factory or outdoors, most of them still rely on human eyes to observe the centering accuracy. The disadvantages are: there are errors in human eye observation, and there is a certain probability of whether the centering can be done well; since the mass of the shaft is generally large, once the centering fails, it will cause the shaft to bump or even collapse, resulting in the shaft being scrapped; even after alignment, the shaft can be installed into the hole, and there is a high probability that half of the shaft will not fit in during this process, and the shaft pulling process will also cause the outer wall of the shaft to be strained; during the outdoor installation process, if the shaft is scrapped due to damage such as strain, it will seriously affect the progress of the project; and the high-precision instruments on the market are complicated to operate and expensive, and are not convenient to carry and disassemble, and are not suitable for high-altitude shaft alignment and installation conditions of large equipment. Summary of the invention

[0003] In view of the above problems in the prior art, the purpose of the present invention is to design an automatic centering device for installing a large diameter shaft.

[0004] To achieve the above-mentioned purpose, the patent of the present invention adopts the following technical scheme: an automatic centering device for installing a large-diameter shaft, characterized in that it includes an electric hydraulic adjustment device with adjustable height, a centering mechanism and a control system; wherein the hydraulic adjustment device includes a motor, a hydraulic rod, hydraulic oil, a pressure relief plug, a spring, an oil stop ball, and a piston. The motor is used to reciprocately pressurize and release the air in the upper part of the piston to make it move up and down, and the hydraulic oil in the main cylinder flows through the pipeline through the auxiliary cylinder and then flows to the bottom of the hydraulic rod to raise it; the centering mechanism includes a rubber pad, a mechanical arm, a spring, a track reciprocating mechanism and a cross laser centering instrument. For circular holes of different diameters, the slider in the track reciprocating mechanism is used to achieve extension and retraction, so that the rubber pad on the mechanical arm is tightly attached to the inner wall of the circular hole, and then the center of the circular hole is found by the cross laser centering instrument, and the center position coordinate signal is transmitted to the control system; the sensor on the shaft is then used to align the center position of the circular hole to achieve installation. Furthermore, the entire centering device must be installed and fixed on a flat horizontal surface or parallel to the axis of the circular hole. The matching mechanism includes the mechanism where the circular hole is located, the operating platform and the installation shaft. The installation shaft is raised to the height of the circular hole by a large hoisting machine. The sensor transmits the center position coordinates of the installation shaft to the control system and compares them with the center position coordinate information of the circular hole to adjust the position difference to achieve the installation of the shaft. Furthermore, the electric hydraulic device uses the cavity pressure on the upper part of the small piston to achieve the up and down reciprocating motion of the piston. The air is sucked out of the cavity by the motor, causing a short negative pressure in the cavity. The small piston moves up, and the hydraulic oil is sucked from the main cylinder into the auxiliary cylinder at the lower part of the small piston. Then the air is injected into the cavity by the motor. The pressure in the cavity increases, forcing the small piston to move downward. Due to the presence of the oil stop ball, the hydraulic oil is injected into the cavity at the lower part of the hydraulic rod through the pipeline to force the hydraulic rod to move upward, thereby achieving the lifting of the hydraulic device.

[0005] Furthermore, a signal receiving device is installed in the control system to receive position coordinate signals from sensors and centering equipment.

[0006] Furthermore, the centering device is provided with a conical screw and a belt drive mechanism, which drives the conical screw to reciprocate through the belt drive to realize the telescopic movement of the slider, and finally adapts to the installation holes of different apertures. The above-mentioned technical scheme can realize automatic centering and centering operations, avoid human intervention, and ensure the smooth implementation of the centering process.

[0007] The beneficial effects of the present invention are as follows: the patent of the present invention is mainly used for the shaft alignment installation of offshore and onshore wind turbines, as well as the shaft alignment installation of large-caliber and ultra-large-caliber antenna radars. Manually operated alignment installation has great uncertainty and requires rich experience to operate the alignment process, which is time-consuming, labor-intensive and costly. Simple and easy-to-operate alignment equipment is the first choice for the shaft alignment installation of large assemblies. It is easy to maintain and has a simple operating interface, which is suitable for most installation workers. Automatic alignment equipment is easy to transport and is not affected by the installation environment. In addition, the technical solution automatically finds and centers, avoids human intervention, and reduces alignment errors; the position signal is uniformly transmitted to the control system, and the position error is monitored in real time and can respond in time; it is easy to install and simple to operate, and the user interface can be operated by touch screen; it greatly reduces the economic losses caused by shaft alignment failure during installation; it is more efficient and greatly reduces the time cost during manual installation operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 Schematic diagram of the automatic centering device of the present invention patent Figure 1 ;

[0009] Figure 2 Schematic diagram of the automatic centering device of the present invention patent Figure 2 ;

[0010] Figure 3 Schematic diagram of the automatic centering device of the present invention patent Figure 3 ;

[0011] Figure 4 It is a schematic diagram of the operation of the prior art of the present invention;

[0012] Figure 5 Schematic diagram of the centering mechanism of the patent of this invention.

[0013] Figure 6 This is a schematic diagram of the centering mechanism of the patent of this invention.

[0014] Among them: 1-centering mechanism, 10-rubber pad, 11-mechanical arm, 12-telescopic block, 13-conical bolt, 14 planetary gear, 15-first spring, 2-transmission mechanism, 21 conveyor belt, 22-motor wheel, 223-motor, 23-sensor, 24-axis, 25-matching mechanism, 26-operation interface, 3-cross laser centering instrument, 4-control system, 41-signal receiver, 5-electric hydraulic device, 51-small piston, 52-auxiliary cylinder, 53-oil stop ball, 54-pipeline, 55-second spring, 56-pressure relief plug, 57-main cylinder, 58-hydraulic rod, 59-small motor, 591-air pipe; DETAILED DESCRIPTION

[0015] The following is combined with Figure 1-6And implementation of the patent for this invention is described in detail.

[0016] Figure 1 As shown, this embodiment provides an automatic centering device for installing a large-diameter shaft, including an electric hydraulic device 5 with adjustable height, a centering mechanism 1 and a control system 4;

[0017] The hydraulic adjustment device includes a small motor 59, a hydraulic rod 58, a pressure relief plug 56, a second spring 55, an oil stopper ball 53, and a small piston 51. The small motor 59 is used to repeatedly pressurize and release the air above the small piston 51 to make it move up and down. The hydraulic oil in the main cylinder 57 flows along the pipeline 54 through the auxiliary cylinder 52 and then flows to the bottom of the hydraulic rod 58 to raise it.

[0018] The centering mechanism 1 includes a rubber pad 10, a mechanical arm 11, a telescopic block 12, a conical bolt 13, a planetary gear 14, a spring 15 and a cross laser centering instrument 3. For circular holes of different diameters, the slider 12 in the centering mechanism 1 is used to achieve telescoping, so that the rubber pad 10 on the mechanical arm 11 is tightly attached to the inner wall of the circular hole, and then the cross laser centering instrument 3 is used to find the center of the circular hole, and the center position coordinate signal is transmitted to the signal receiver 41 in the control system 4; the sensor 23 on the shaft is then used to transmit the shaft center position signal to the control system 4, and the operator operates through the operation interface 26 and aligns the center position of the circular hole to achieve installation.

[0019] The entire centering mechanism 1 must be installed and fixed on a flat horizontal surface or parallel to the axis of the circular hole. The matching mechanisms include the matching mechanism 25 where the circular hole is located, the operating platform and the installation shaft 24. The installation shaft 24 is raised to the height of the circular hole by a large hoisting machine. The sensor 23 transmits the center position coordinates of the installation shaft 24 to the control system 4, and compares it with the center position coordinate information of the circular hole, adjusts the position difference, and realizes the installation of the shaft.

[0020] The electric hydraulic device 5 utilizes the cavity pressure on the upper part of the small piston 51 to realize the up and down reciprocating motion of the small piston 51. The air is sucked out of the cavity by the small motor 59, so that a short negative pressure appears in the cavity, and the small piston 51 moves upward. The hydraulic oil is sucked from the main cylinder 57 into the auxiliary cylinder 52 at the lower part of the small piston 51, and then the air is injected into the cavity by the small motor 59. The pressure in the cavity increases, forcing the small piston 51 to move downward. Due to the presence of the oil stop ball 53, the hydraulic oil is injected into the cavity at the lower part of the hydraulic rod 58 through the pipeline, forcing the hydraulic rod 58 to move upward, thereby realizing the lifting of the hydraulic device 5.

[0021] A small conical threaded rod is arranged inside the centering mechanism, and the extension and contraction movement of the slider can be realized through its forward and backward movement. The transmission inside the centering mechanism is realized by the motor 223 of the transmission system 2 driving the motor wheel 22, the conveyor belt 21 and the planetary gear 14. The mechanism can be operated using the internal software of the control system.

[0022] The present invention is not limited to the above-mentioned specific implementation modes. A person skilled in the art may implement the present invention in various other specific implementation modes according to the embodiments and the disclosure of the drawings. Therefore, any design that adopts the design structure and concept of the present invention and makes some simple transformations or changes shall fall within the scope of protection of the present invention.

Claims

1. An automatic centering device for large diameter shaft installation, characterized in that: It includes an electric hydraulic adjustment device with adjustable height, a centering mechanism and a control system; the hydraulic adjustment device includes a motor, a hydraulic rod, hydraulic oil, a pressure relief plug, a spring, an oil stop ball and a piston. The motor is used to repeatedly pressurize and release the air above the piston to make it move up and down. The hydraulic oil in the main cylinder flows through the pipeline through the auxiliary cylinder and then flows to the bottom of the hydraulic rod to raise it. The centering mechanism includes a rubber pad, a robotic arm, a spring, a track reciprocating mechanism and a cross laser centering meter. For circular holes of different diameters, the slider in the track reciprocating mechanism is used to achieve extension and retraction, so that the rubber pad on the robotic arm is tightly attached to the inner wall of the circular hole. The center of the circular hole is then found using the cross laser centering meter, and the center position coordinate signal is transmitted to the control system. The sensor on the shaft is then used to align the center position of the circular hole to achieve installation.

2. The large diameter shaft installation automatic centering device according to claim 1, characterized in that: The entire alignment equipment must be installed and fixed on a flat horizontal surface or parallel to the axis of the circular hole. The matching mechanisms include the mechanism where the circular hole is located, the operating platform and the installation shaft. The installation shaft is raised to the height of the circular hole by a large hoist. The sensor transmits the center position coordinates of the installation shaft to the control system and compares them with the center position coordinate information of the circular hole, adjusts the position difference, and realizes the installation of the shaft.

3. The large diameter shaft installation automatic centering device according to claim 1, characterized in that: The electric hydraulic device uses the cavity pressure on the top of the small piston to achieve the up and down reciprocating motion of the piston. The air is sucked out of the cavity by the motor, causing a brief negative pressure in the cavity. The small piston moves upward, and the hydraulic oil is sucked from the main cylinder into the auxiliary cylinder under the small piston. The air is then injected into the cavity through the motor. The pressure in the cavity increases, forcing the small piston to move downward. Due to the presence of the oil stop ball, the hydraulic oil is injected into the cavity at the bottom of the hydraulic rod through the pipeline, forcing the hydraulic rod to move upward, thereby achieving the lifting of the hydraulic device.

4. An automatic centering device for installing a large diameter shaft as claimed in claims 1, 2 and 3, characterized in that: The control system is equipped with a signal receiving device for receiving position coordinate signals transmitted from sensors and centering equipment.

5. The large diameter shaft installation automatic centering device according to claim 4, characterized in that: The centering device is provided with a conical screw and a belt transmission mechanism, and the belt transmission drives the conical screw to reciprocate, thereby realizing the telescopic movement of the slider, and finally adapting to installation holes with different apertures.

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