Dry gas seal dismounting device for centrifugal compressor

Abstract

A dry gas seal dismounting device of a centrifugal compressor comprises a fixed disc, a middle ejector rod is arranged in the middle of the fixed disc, and outward pulling screws are arranged on the fixed disc on the two sides of the middle ejector rod and fastened to the fixed disc through fasteners. Threads are arranged on the middle ejector rod, a shaft head threaded hole is formed in the center of the fixing disc, and the shaft head threaded hole is matched with the threads of the middle ejector rod; the fixing disc is in an H shape, U-shaped through holes are formed in the two sides of the fixing disc, the U-shaped through holes are perpendicular to the fixing disc, and the U-shaped through holes are matched with threads of the outer pulling screw rods. According to the utility model, the limiting tool of the fixed disc is additionally arranged, and the connection mode of matching the screw rod and the nut is adopted, so that the stability and the man-machine adaptability can be obviously improved; the fixing disc is matched with dry gas sealing devices of different models and can be repeatedly used.

Description

Technical Field

[0001] This utility model relates to the field of dry gas seal maintenance technology, specifically to a dry gas seal disassembly device for centrifugal compressors. Background Technology

[0002] As a core component of natural gas pipeline compressors, the dry gas seal's working condition directly determines the compressor's operational safety. Changes in the amount of leaking gas in the seal are a direct reflection of a malfunction, requiring maintenance personnel to inspect and replace it. Due to its highly precise nature, it demands specialized installation and disassembly tools. Conventional disassembly of the dry gas seal often involves screwing a lead screw into the pre-drilled opening in the seal sleeve, slowly pulling the lead screw axially, and then using a crane to lift the seal sleeve's lifting ring. While this method is convenient, it inevitably leads to issues such as the bushing scraping against the main shaft, the adjusting seat scraping against the cylindrical housing, the cavity, and the seal itself, resulting in poor sealing performance. Therefore, this technical solution suffers from poor stability and low human-machine interface coordination. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a centrifugal compressor dry gas seal disassembly device, which can significantly improve stability and human-machine cooperation, is compatible with different models of dry gas seal devices, and can be reused.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A centrifugal compressor dry gas seal disassembly device includes a fixed plate 1, a central push rod 3 disposed in the middle of the fixed plate 1, and external pull screws 2 disposed on the fixed plate 1 on both sides of the central push rod 3. The external pull screws 2 are fastened to the fixed plate 1 by fasteners 5.

[0006] The central push rod 3 is provided with threads, and the center of the fixed plate 1 is provided with a shaft head threaded hole 7, which is threadedly engaged with the central push rod 3.

[0007] The fixed plate 1 is H-shaped, with U-shaped through holes 8 on both sides. The U-shaped through holes 8 are perpendicular to the fixed plate 1 and are connected to the external pull screw 2.

[0008] The external pull screws 2 are symmetrically distributed on both sides of the fixed plate 1. The external pull screws 2 are surrounded by fasteners 5 consisting of washers and nuts on both sides of the fixed plate 1. The fasteners 5 are tightly attached to the side of the U-shaped through hole 8.

[0009] The head of the central top rod 3 is a round bead 6.

[0010] The end of the central top rod 3 is a screw handle 4, which is hexagonal in shape.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. This utility model adds a limiting fixture for the fixed plate 1, which adopts a connection method of screw and nut to radially limit the disassembly of the seal, prevent the bushing from scratching the main shaft and the adjusting seat from scratching the cylindrical housing, and prevent the cavity and seal from being scratched, which can significantly improve stability and human-machine cooperation.

[0013] 2. The fixed plate 1 has an H-shaped open structure with U-shaped through holes on both sides, which can adapt to the multi-segment clamping distance. It replaces the previous configuration of one machine and one tooling, and can be adapted to different models of dry gas sealing devices, which is in line with the policy of green manufacturing and reuse. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model.

[0015] Figure 2 This is a schematic diagram of the fixed disk structure in an embodiment of the present utility model. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the embodiments and accompanying drawings.

[0017] Reference Figure 1 and Figure 2 A centrifugal compressor dry gas seal disassembly device includes a fixed plate 1, a central push rod 3 is arranged in the middle of the fixed plate 1, and external pull screws 2 are arranged on the fixed plate 1 on both sides of the central push rod 3. The external pull screws 2 are fastened to the fixed plate 1 by fasteners 5.

[0018] The central push rod 3 is provided with threads, and the center of the fixed plate 1 is provided with a shaft head threaded hole 7, which is threadedly engaged with the central push rod 3.

[0019] The fixed plate 1 is H-shaped with U-shaped through holes 8 on both sides. The U-shaped through holes 8 are perpendicular to the fixed plate 1 and are connected to the external pull screws 2. The U-shaped through holes 8 can be adapted to dry gas seals of different sizes, effectively saving resources. When disassembling the dry gas seal, there may be a misalignment of the shaft center. The external pull screws 2 on both sides can be adjusted to correct the misalignment.

[0020] The external pull screws 2 are symmetrically distributed on both sides of the fixed plate 1. The external pull screws 2 are surrounded by fasteners 5 consisting of washers and nuts on both sides of the fixed plate 1. The fasteners 5 are tightly attached to the side of the U-shaped through hole 8. The nuts and washers prevent the external pull screws 2 from moving accidentally.

[0021] The head of the central push rod 3 is a round bead 6, which can effectively reduce the damage caused by the force exerted by the central push rod 3 on the rotating shaft.

[0022] The end of the central top rod 3 is a screw handle 4, which is hexagonal and easy to adjust by hand.

[0023] The working principle of this utility model is as follows: the axial end of the external pull screw 2 is screwed parallel to the outer side of the truncated circle of the bushing of the dry gas seal; the middle push rod 3 passes through the fixed plate 1, and the top end contacts the rotating shaft; after confirming that the reference line on the seal and the main shaft are in the same vertical plane, the nuts on the two external pull screws 2 are rotated at the same time to slowly push the seal to the working position; when tightening the nuts, the force on both sides should be balanced to prevent uneven force from causing damage to the cavity and the seal; when disassembling the dry gas seal, the middle push rod 3 passes through the center hole of the fixed plate 1 and continues to screw in until it touches the center point of the rotating shaft; the external pull screw 2 passes through the U-shaped through hole 8 of the fixed plate 1 and tightens the four sets of nuts and washers; the top of the external pull screw 2 is screwed into the disassembly and assembly process hole of the dry gas seal, the external pull screw 2 is tightened, and then the two sets of nuts and washers far from the dry gas seal are disassembled, and the two external pull screws 2 are controlled to rotate at the same speed, and the dry gas seal is pulled out of the cavity under the reaction force.

Claims

1. A centrifugal compressor dry gas seal disassembly device, characterized by: It comprises a fixed disc (1), a middle top rod (3) is arranged in the middle of the fixed disc (1), and an outer pull screw (2) is arranged on the fixed disc (1) on both sides of the middle top rod (3), and the outer pull screw (2) is fastened on the fixed disc (1) through a fastener (5).

2. The apparatus of claim 1, wherein: A threaded hole is arranged on the middle top rod (3), and a shaft head threaded hole (7) is arranged at the center of the fixed disc (1), and the shaft head threaded hole (7) is threadedly connected with the middle top rod (3).

3. The apparatus of claim 1, wherein: The fixed disc (1) is in H shape, and a U-shaped through hole (8) is arranged on both sides, the U-shaped through hole (8) is perpendicular to the fixed disc (1), and the U-shaped through hole (8) is connected with the outer pull screw (2).

4. The apparatus of claim 1, wherein: The outer pull screw (2) is symmetrically arranged on both sides of the fixed disc (1), and the outer pull screw (2) is surrounded by a gasket and a nut to form a fastener (5) arranged on both sides of the fixed disc (1), and the fastener (5) is tightly attached to the side surface of the U-shaped through hole (8).

5. The apparatus of claim 1, wherein: The head of the middle top rod (3) is a round ball type top ball (6).

6. The apparatus of claim 1, wherein: The end of the middle top rod (3) is a screw handle (4), which is in hexagonal shape.

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