High-precision centering device for steam turbine type cargo oil pump set of Ahibia type oil tanker

Abstract

The utility model relates to a high-precision centering device of a steam turbine type cargo oil pump set of an Ahibiscus type oil tanker, which is used for the cargo oil pump set, the cargo oil pump set comprises a cargo oil pump steam turbine, an intermediate shaft of bulkhead packing and a cargo oil pump which are arranged from top to bottom, and the centering device is arranged between the intermediate shaft and the cargo oil pump. The centering device comprises a telescopic centering shaft, the telescopic centering shaft comprises a fixed column and a telescopic rod, and the telescopic rod is arranged in the fixed column in a telescopic mode. Through the collaborative design of the telescopic centering shaft, the multi-interface adapter, the wireless sensor and the hydraulic driving mechanism, high-precision, high-efficiency and high-universality centering operation is achieved, the automatic centering device is suitable for installation and maintenance of a ship cargo oil pump set, the labor cost is remarkably reduced, and the operation stability of equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of marine machinery installation technology, and in particular to a high-precision alignment device for a steam turbine-type cargo oil pump set of an Aframax oil tanker, which is suitable for the installation and commissioning of cargo oil pump sets of Aframax oil tankers. Background Technology

[0002] In Aframax tankers, the cargo oil pump unit mainly consists of a steam turbine, a central shaft for the bulkhead packing, and the cargo oil pump body. Some shipyards equip their cargo oil pump units with universal joints, which can be used to adjust for misalignment between the steam turbine and the cargo oil pump body. From top to bottom, the cargo oil pump unit comprises the steam turbine, the central shaft for the bulkhead packing, and the cargo oil pump body. The alignment accuracy (≤0.2mm) of these components is crucial for ensuring long-term stable operation of the equipment. Existing technology has the following shortcomings:

[0003] (1) Traditional laser alignment method: It is greatly affected by environmental vibration, has significant measurement error, and has high equipment cost;

[0004] (2) Ruler and feeler gauge method: relies on manual experience, is inefficient and has poor repeatability;

[0005] (3) Existing temporary shaft solutions: such as flange connection type dummy shaft, which has a single function, cannot be adapted to pump groups with different spacing, and lacks automatic adjustment capability.

[0006] Therefore, the applicant proposes a high-precision alignment device for steam turbine-type cargo oil pump sets of Aframax oil tankers to solve the comprehensive problems of rapid adaptation, high-precision measurement and automated adjustment. Summary of the Invention

[0007] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a high-precision centering device for steam turbine-type cargo oil pump sets of Aframax oil tankers, thereby improving centering efficiency, accuracy and versatility.

[0008] The purpose of this utility model is achieved as follows:

[0009] A high-precision alignment device for a steam turbine-type cargo oil pump unit of an Aframax oil tanker is provided for the cargo oil pump unit, which includes a cargo oil pump steam turbine, a intermediate shaft of bulkhead packing, and a cargo oil pump arranged from top to bottom. An alignment device is provided between the intermediate shaft and the cargo oil pump. The alignment device includes a telescopic alignment shaft, which includes a fixed column and a telescopic rod. The telescopic rod is telescopically installed inside the fixed column.

[0010] The fixed column is equipped with a hydraulic cylinder, and a piston is movably connected inside the hydraulic cylinder for hydraulic oil propulsion. The bottom of the telescopic rod is connected above the piston, and a locking mechanism is provided at the top of the fixed column. The locking mechanism is located on the outlet side of the telescopic rod extending out of the fixed column. The telescopic centering shaft is equipped with adapter heads at both ends, that is, a replaceable adapter head is connected to the bottom of the fixed column and the top of the telescopic rod, supporting tapered, flange and keyway connections.

[0011] The telescopic centering shaft is equipped with a wireless displacement sensor inside, which measures radial and axial deviations in real time and transmits the data to the control terminal. After receiving the command from the control terminal, the hydraulic cylinder automatically fine-tunes the height.

[0012] Furthermore, the piston divides the interior of the oil cylinder into an upper oil chamber and a lower oil chamber. The upper oil chamber is located inside the oil cylinder and near the top, while the lower oil chamber is located inside the oil cylinder and near the bottom. The upper and lower oil chambers are separated by the piston, which facilitates sealing and blocking.

[0013] Furthermore, a shock-absorbing spring is provided below the piston to reduce vibration.

[0014] Furthermore, the top end of the shock-absorbing spring is connected to the bottom surface of the piston, and the bottom end of the shock-absorbing spring is connected to the bottom surface of the lower oil chamber, which facilitates positioning and connection.

[0015] Furthermore, the locking mechanism employs an electromagnetic locking device to ensure the stability of the telescopic section's position.

[0016] Furthermore, a sealing ring is provided at the contact point between the top surface of the hydraulic cylinder and the telescopic rod, and the inner surface of the sealing ring is movably connected to the surface of the movable telescopic rod to improve the sealing performance of the hydraulic cylinder.

[0017] Furthermore, the adapter head adopts a quick-release structure and is fixed by spring clips.

[0018] Furthermore, the surfaces of the fixed column and the telescopic rod are coated with a tungsten carbide coating to improve wear resistance.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This invention provides a high-precision alignment device for a steam turbine-type cargo oil pump unit on an Aframax oil tanker. Through an integrated design combining a retractable alignment shaft, wireless sensing, hydraulic drive, and multi-interface adaptation, this invention systematically solves the problems of poor adaptability, low efficiency, and reliance on manual labor inherent in traditional alignment technologies. This invention has the following advantages:

[0021] (1) Improved accuracy: The wireless sensor works in conjunction with the electric jacking, and the centering error is ≤0.1mm, which is better than the traditional method;

[0022] (2) Efficiency optimization: The telescopic dummy shaft is compatible with pump sets with different spacing, greatly shortening the installation time;

[0023] (3) High versatility: The multi-interface adapter supports more than 90% of pump set models;

[0024] (4) Extended lifespan: The wear-resistant coating extends the lifespan of the dummy shaft. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0026] Figure 2 This is a schematic diagram of the centering device according to Embodiment 1 of this utility model.

[0027] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0028] in:

[0029] Cargo oil pump steam turbine 1, intermediate shaft 2, centering device 3, fixed column 3.1, telescopic rod 3.2, oil cylinder 3.3, piston 3.4, upper oil chamber 3.5, lower oil chamber 3.6, shock absorber spring 3.7, locking mechanism 3.8, adapter head 3.9, cargo oil pump 4, radial dial indicator 5, axial dial indicator 6. Detailed Implementation

[0030] To better understand the technical solution of this utility model, a detailed description will be provided below in conjunction with relevant illustrations. It should be understood that the specific embodiments described below are not intended to limit the specific implementation of the technical solution of this utility model, but are merely possible implementations of the technical solution of this utility model. It should be noted that the descriptions of the positional relationships of the components herein, such as component A being located above component B, are based on the relative positions of the components in the illustrations and are not intended to limit the actual positional relationships of the components. Example 1

[0031] See Figure 1-2 , Figure 1 A schematic diagram of a high-precision alignment device for a steam turbine-type cargo oil pump unit of an Aframax oil tanker, according to Embodiment 1, is shown. As shown, Embodiment 1 relates to a high-precision alignment device for a steam turbine-type cargo oil pump unit of an Aframax oil tanker. The cargo oil pump unit includes, from top to bottom, a cargo oil pump steam turbine 1, an intermediate shaft 2 for compartment packing, and a cargo oil pump 4. An alignment device 3 is provided between the intermediate shaft 2 and the cargo oil pump 4. The alignment device 3 includes a telescopic alignment shaft, which includes a fixed column 3.1 and a telescopic rod 3.2. The telescopic rod 3.2 is telescopically mounted within the fixed column 3.1 and achieves axial extension and retraction via a hydraulic drive mechanism, with an adjustment range of ±50mm.

[0032] The fixed column 3.1 is equipped with a hydraulic cylinder 3.3, and a piston 3.4 is movably connected inside the hydraulic cylinder 3.3 for hydraulic oil propulsion. The piston 3.4 divides the inside of the hydraulic cylinder 3.3 into an upper oil chamber 3.5 and a lower oil chamber 3.6. The upper oil chamber 3.5 is located inside the hydraulic cylinder 3.3 and near the top, and the lower oil chamber 3.6 is located inside the hydraulic cylinder 3.3 and near the bottom. The upper oil chamber 3.5 and the lower oil chamber 3.6 are separated by the piston 3.4, which facilitates sealing and blocking.

[0033] The piston 3.4 is connected to the bottom of the telescopic rod 3.2 above, which serves as a movable telescopic support; a shock-absorbing spring 3.7 is provided below the piston 3.4 to reduce vibration. The top of the shock-absorbing spring 3.7 is connected to the bottom surface of the piston 3.4, and the bottom of the shock-absorbing spring 3.7 is connected to the bottom surface of the lower oil chamber 3.6, which facilitates positioning and connection.

[0034] A sealing ring is provided at the contact point between the top surface of the hydraulic cylinder 3.3 and the telescopic rod 3.2. The inner surface of the sealing ring is movably connected to the surface of the telescopic rod 3.2 to improve the sealing performance of the hydraulic cylinder 3.3.

[0035] The top of the fixed column 3.1 is provided with a locking mechanism 3.8, which is located on the side where the telescopic rod 3.2 extends out of the fixed column 3.1. The locking mechanism 3.8 adopts an electromagnetic locking device to ensure the stability of the telescopic section.

[0036] The telescopic center shaft is provided with adapter heads 3.9 at both ends, that is, a replaceable adapter head 3.9 is connected to the bottom of the fixed column 3.1 and the top of the telescopic rod 3.2, which supports tapered, flange and keyway connections;

[0037] The adapter 3.9 adopts a quick-release structure and is fixed by a spring clip, allowing replacement to be completed within 3 seconds.

[0038] The telescopic centering shaft is equipped with a wireless displacement sensor to measure radial / axial deviation in real time. The data is transmitted to a handheld terminal via Bluetooth. After receiving the command from the handheld terminal, the hydraulic cylinder 1 automatically adjusts its height with an accuracy of ±0.05mm.

[0039] The surfaces of the fixed column 3.1 and the telescopic rod 3.2 are coated with tungsten carbide to improve wear resistance.

[0040] The displacement sensor is connected to a digital feedback module, which generates adjustment suggestions by combining the sensor data with the digital feedback module, thereby reducing manual intervention. Example 2

[0041] See Figure 3 , Figure 3A schematic diagram of a high-precision alignment device for a steam turbine-type cargo oil pump unit of an Aframax oil tanker is shown in Embodiment 1. As shown in the figure, the high-precision alignment device for a steam turbine-type cargo oil pump unit of an Aframax oil tanker involved in Embodiment 2 differs from Embodiment 1 in that a temporary alignment shaft is provided between the intermediate shaft 2 and the cargo oil pump 4. High-precision mating surfaces (such as tapered fits or flange connections) are machined at both ends of the temporary alignment shaft to ensure seamless connection with the turbine / pump unit coupling. The pump unit base is finely adjusted using lifting bolts until the alignment error is ≤0.2mm.

[0042] The top of the temporary center axis is connected to a vertically installed axial dial indicator 6, and the axial dial indicator 6 is connected to a horizontally installed radial dial indicator 5 via a U-shaped bracket;

[0043] Place the temporary centering shaft on the inlet flange of the cargo oil pump 4, and measure the radial / axial deviation using the radial dial indicator 5 and the axial dial indicator 6.

[0044] Working principle:

[0045] This utility model provides a high-precision alignment device for a steam turbine-type cargo oil pump unit for an Aframax oil tanker. Installation process:

[0046] 1. Adjust and lock the length of the telescopic centering shaft according to the pump set spacing;

[0047] 2. Select the appropriate adapter and install it onto both ends of the telescopic centering shaft;

[0048] 3. Connect the telescopic centering shaft to the turbine and pump body coupling, and start the sensor to measure the deviation;

[0049] 4. Use a handheld terminal to control the hydraulic drive device to fine-tune the base until the error is ≤0.1mm.

[0050] Maintenance process:

[0051] 1. Remove the quick-release adapter and clean the coated surface;

[0052] 2. Check the hydraulic pressure of the hydraulic mechanism to ensure that the telescopic function is normal.

[0053] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model. All technical solutions formed by equivalent transformations or equivalent substitutions fall within the scope of protection of this utility model.

Claims

1. A high precision centering device for steam turbine type cargo oil pump set of Aframax type tanker, for cargo oil pump set, characterized in that: The cargo oil pump unit includes a cargo oil pump steam turbine (1), a compartment packing intermediate shaft (2), and a cargo oil pump (4) arranged from top to bottom. An alignment device (3) is provided between the intermediate shaft (2) and the cargo oil pump (4). The alignment device (3) includes a telescopic alignment shaft, which includes a fixed column (3.1) and a telescopic rod (3.2). The telescopic rod (3.2) is telescopically installed inside the fixed column (3.1). The fixed column (3.1) is equipped with a hydraulic cylinder (3.3), and a piston (3.4) is movably connected inside the hydraulic cylinder (3.3) for hydraulic oil propulsion; the bottom of the telescopic rod (3.2) is connected above the piston (3.4), and a locking mechanism (3.8) is provided at the top of the fixed column (3.1). The locking mechanism (3.8) is located on the side where the telescopic rod (3.2) extends out of the fixed column (3.1); the telescopic centering shaft is equipped with adapter heads (3.9) at both ends, that is, a replaceable adapter head (3.9) is connected to the bottom of the fixed column (3.1) and the top of the telescopic rod (3.2), supporting tapered, flange and keyway connections; The telescopic centering shaft is equipped with a wireless displacement sensor to measure radial and axial deviations in real time. The data is transmitted to the control terminal, and the hydraulic cylinder (3.3) automatically adjusts its height after receiving the command from the control terminal.

2. A high precision centering device for a steam turbine type cargo oil pump set of an Aframax type tanker according to claim 1, characterized in that: The piston (3.4) divides the interior of the cylinder (3.3) into an upper oil chamber (3.5) and a lower oil chamber (3.6). The upper oil chamber (3.5) is located inside the cylinder (3.3) and near the top, while the lower oil chamber (3.6) is located inside the cylinder (3.3) and near the bottom. The upper oil chamber (3.5) and the lower oil chamber (3.6) are separated by the piston (3.4), which facilitates sealing and blocking.

3. A high precision centering device for a steam turbine type cargo oil pump set of an Aframax type tanker according to claim 1, characterized in that: A shock-absorbing spring (3.7) is provided below the piston (3.4) to reduce vibration.

4. A high precision centering device for a steam turbine type cargo oil pump set of an Aframax type tanker according to claim 3, characterized in that: The top end of the shock-absorbing spring (3.7) is connected to the bottom surface of the piston (3.4), and the bottom end of the shock-absorbing spring (3.7) is connected to the bottom surface of the lower oil chamber (3.6), which facilitates positioning and connection.

5. A high precision centering device for a steam turbine type cargo oil pump set of an Aframax type tanker according to claim 1, characterized in that: The locking mechanism (3.8) uses an electromagnetic locking device to ensure the stability of the telescopic section position.

6. The high-precision alignment device for an Aframax tanker steam turbine-type cargo oil pump set according to claim 1, characterized in that: A sealing ring is provided at the contact point between the top surface of the hydraulic cylinder (3.3) and the telescopic rod (3.2). The inner surface of the sealing ring is movably connected to the surface of the telescopic rod (3.2) to improve the sealing performance of the hydraulic cylinder (3.3).

7. A high precision centering device for a steam turbine cargo pump set of an Aframax tanker according to claim 1, characterized in that: The adapter (3.9) adopts a quick-release structure and is fixed by a spring clip.

8. A high precision centering device for a steam turbine type cargo oil pump set of an Aframax type tanker according to claim 1, characterized in that: The surfaces of the fixed column (3.1) and the telescopic rod (3.2) are coated with tungsten carbide to improve wear resistance.

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