A device for dismounting and mounting a rotor of an inner cylinder of a marine natural gas compressor

Abstract

The utility model discloses a kind of for offshore natural gas compressor inner cylinder rotor dismounting device, including shell positioning part, shell positioning part one end connects arc connecting plate, arc connecting plate is replaced according to the size of compressor volume, arc connecting plate of different radian, shell positioning part other end connects tail end balance support seat, the lower part of oil cylinder support seat is movably connected in shell positioning part middle part, the one end of oil cylinder support seat upper part is connected two-way oil cylinder, the other end of oil cylinder support seat upper part is connected adjustment block one end through movable joint, adjustment block other end welds auxiliary device top plate, guide wheel group is fixed after passing through adjustment block. The utility model device satisfies the modularization quick dismounting demand of offshore platform limited operating space, has multi-dimension constraint compensation function in assembly process, improves assembly efficiency and assembly quality, avoids the major quality hidden danger possibly existing in assembly process.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical structure technology, and in particular relates to a disassembly and assembly device for the inner cylinder rotor of an offshore natural gas compressor. Background Technology

[0002] In the field of high-end equipment manufacturing for offshore platform natural gas compressor units, existing centrifugal compressor products adopt a horizontally split main structure. The newly developed cylindrical integral structure model consists of three core modules: a fully enclosed forged cylindrical casing, detachable and slidable diaphragm assemblies, and a cantilevered rotor system. The assembly process requires the pre-balanced and calibrated rotor and diaphragm assemblies to be axially inserted into the cylindrical chamber. However, traditional vertical assembly processes have revealed technical bottlenecks in this compact natural gas compressor application scenario. Therefore, there is an urgent need to find a new assembly process and equipment that can accurately position the rotor and diaphragm assemblies in six degrees of freedom, adapt to the modular and rapid assembly / disassembly requirements of the limited operating space on offshore platforms, and possess multi-dimensional constraint compensation functions.

[0003] The existing assembly method is vertical assembly. This assembly technology, a typical process for traditional cylindrical structure products, relies on vertical suspension to achieve axial alignment and installation of internal components with the outer cylinder. However, this method creates an unlimited surface area between the rotor assembly and the partition assembly, leading to uncontrolled axial displacement of the rotor system during assembly. This dynamic instability directly causes the following technical risks: 1. Contact friction damage occurs between the diaphragm sealing teeth and the rotor journal surface; 2. Interference and collision occur between the moving blades of the impeller and the stationary parts.

[0004] The aforementioned failure modes will severely affect the unit's aerodynamic performance and operational reliability, posing significant potential assembly quality risks. Utility Model Content

[0005] The problem this utility model aims to solve is to provide a disassembly and assembly device for the inner cylinder rotor of an offshore natural gas compressor, which addresses the need for modular and rapid disassembly and assembly in the limited working space of offshore platforms, improves assembly efficiency, and eliminates potential assembly quality issues.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a disassembly and assembly device for the inner cylinder rotor of an offshore natural gas compressor, including a housing positioning part, one end of which is connected to an arc connecting plate. The arc connecting plate is replaced with an arc connecting plate of different curvatures according to the size of the compressor. The other end of the housing positioning part is connected to a tail end balance support seat. The middle part of the housing positioning part is movably connected to the lower part of a hydraulic cylinder support seat. One end of the upper part of the hydraulic cylinder support seat is connected to a bidirectional hydraulic cylinder. The other end of the upper part of the hydraulic cylinder support seat is connected to one end of an adjusting block through a movable joint. The other end of the adjusting block is welded with an auxiliary device top plate. The guide wheel assembly passes through the adjusting block and is then fixed.

[0007] Furthermore, the housing positioning part includes a square tube, one end of which is welded with a transition connecting plate, and the other end of which is welded with a head cover plate. The square tube has a plurality of evenly distributed strip-shaped mounting holes on a pair of parallel surfaces.

[0008] Furthermore, multiple reinforcing ribs are welded at the connection between the transition connecting plate and the square tube.

[0009] Furthermore, the arc-shaped connecting plate is a square plate, and a guide arc surface is provided on the upper part of the arc-shaped connecting plate. The arc-shaped connecting plate is generally stepped, and the thickness of the guide arc surface is greater than that of the lower plane of the arc-shaped connecting plate. The plane of the arc-shaped connecting plate is provided with a plurality of first connecting holes and round holes. The transition connecting plate is provided with a plurality of second connecting holes. The first connecting holes are aligned with the second connecting holes and are fixed by a plurality of first bolts. The round holes are connected and fixed to the first threaded holes on the end face of the housing by second bolts.

[0010] Furthermore, the tail end balance support includes a base plate, which is perpendicularly welded to the end cap plate. The base plate has a second threaded hole at its center, and a third bolt is placed in the second threaded hole. Rotating the third bolt allows for tail end height adjustment.

[0011] Furthermore, the cylinder support includes a base with an H-shaped side. The upper part of the front of the base is an isosceles trapezoidal shape, and the lower part is rectangular. Holes are provided at both ends of the rectangular section at the bottom of the base. These holes are aligned with any two adjacent strip-shaped mounting holes on the square tube and are fixed by pins. A through hole is provided at the center of the trapezoidal plate above the base. The mounting plate is circular and has several third threaded holes on its outer circumference. Two symmetrical pin holes are provided on both ends of the outer circle of the mounting plate along a diameter direction. The through holes are aligned with the pin holes and are fixed by positioning pins. Pressure blocks are provided on both sides of the mounting plate at the positioning pin fixing points on the top of the base, and the pressure blocks limit the position of the mounting plate.

[0012] Furthermore, the bidirectional hydraulic cylinder includes an oil pump and an oil cylinder. The oil cylinder has two oil injection holes, front and rear, and has a push-pull effect, achieving versatility in disassembly and assembly. The flange face of the oil cylinder is connected to the third threaded hole of the mounting plate by a fourth bolt, thereby connecting and fixing the oil cylinder to the oil cylinder support seat.

[0013] Furthermore, the movable joint has a threaded hole at one end near the cylinder support seat, which is connected to the bidirectional hydraulic cylinder push rod. The other end of the movable joint has a first groove at its center, and there are matching holes on both sides of the first groove.

[0014] Furthermore, one end of the adjustment block is welded to the top plate of the auxiliary device, and the other end of the adjustment block has a hole that is embedded in the first groove. The movable joint is hinged to the adjustment block by a screw.

[0015] Furthermore, the guide wheel assembly includes rollers and a support block. The adjustment block passes through the guide wheel assembly and is connected to the movable joint. The adjustment block is provided with a second groove and a fourth threaded hole. The guide wheel assembly is placed in the second groove and fixed to the adjustment block by bolts.

[0016] The advantages and positive effects of this utility model are: 1. The device of this utility model meets the modular and rapid assembly and disassembly requirements of the limited working space of offshore platforms, has multi-dimensional constraint compensation function in the assembly process, improves assembly efficiency and assembly quality, and avoids major quality hazards that may exist in the assembly process.

[0017] 2. This utility model realizes the feasibility of rapid disassembly and assembly of the inner cylinder rotor of the compact natural gas compressor on offshore platforms, breaking the traditional assembly method and effectively meeting the requirements of high-quality assembly and reliable operation of the unit. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram of the housing positioning part of an embodiment of the present utility model.

[0020] Figure 3 This is a schematic diagram of the arc-shaped connecting plate structure according to an embodiment of the present utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the hydraulic cylinder support seat according to an embodiment of the present utility model.

[0022] In the picture: 1. Housing positioning part; 1-1. Transition connecting plate; 1-2. Square tube; 1-3. Head cover plate; 1-4. Reinforcing rib plate; 1-5. Strip mounting hole; 1-6, Second connecting hole; 2, Arc-shaped connecting plate; 2-1, Circular hole; 2-2. Guide arc surface; 2-3. First connecting hole; 3. Tail end balance support seat; 3-1. Base plate; 3-2. Third bolt; 4. Hydraulic cylinder support seat; 4-1. Base; 4-2. Mounting plate; 4-3. Pressure block; 4-4. Hole position; 4-5. Third threaded hole; 4-6. Pin hole; 4-7. Through hole; 5. Two-way hydraulic cylinder; 6. Movable joint; 7. Guide wheel assembly; 8. Adjusting block; 9. Auxiliary device top plate. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The embodiments of this utility model will be further described below with reference to the accompanying drawings: like Figure 1As shown, a disassembly and assembly device for the inner cylinder rotor of an offshore natural gas compressor includes a housing positioning part 1. One end of the housing positioning part 1 is connected to an arc connecting plate 2. The arc connecting plate 2 is replaced with an arc connecting plate 2 of different curvatures according to the size of the compressor. The other end of the housing positioning part 1 is connected to a tail end balance support seat 3. The middle part of the housing positioning part 1 is movably connected to the lower part of a hydraulic cylinder support seat 4. One end of the upper part of the hydraulic cylinder support seat 4 is connected to a bidirectional hydraulic cylinder 5. The other end of the upper part of the hydraulic cylinder support seat 4 is connected to one end of an adjusting block 8 through a movable joint 6. The other end of the adjusting block 8 is welded with an auxiliary device top plate 9. The guide wheel assembly 7 passes through the adjusting block 8 and is fixed.

[0027] like Figure 2 As shown, the housing positioning part 1 includes a square tube 1-2, a transition connecting plate 1-1 welded to one end of the square tube 1-2, and a head cover plate 1-3 welded to the other end of the square tube 1-2. The square tube 1-2 has a plurality of evenly spaced strip-shaped mounting holes 1-5 on a pair of parallel surfaces. Preferably, multiple reinforcing ribs 1-4 are welded at the connection between the transition connecting plate 1-1 and the square tube 1-2.

[0028] like Figure 3 As shown, the arc connecting plate 2 is a square plate. A guide arc surface 2-2 is provided on the upper part of the arc connecting plate 2 to guide it. The arc connecting plate 2 is generally stepped. The thickness of the guide arc surface 2-2 is greater than that of the lower plane of the arc connecting plate 2. Several first connecting holes 2-3 and round holes 2-1 are provided on the plane of the arc connecting plate 2. Several second connecting holes 1-6 are provided on the transition connecting plate 1-1. The first connecting holes 2-3 and the second connecting holes 1-6 are aligned and fixed by several first bolts. The round hole 2-1 is connected and fixed to the first threaded hole on the end face of the housing by second bolts.

[0029] In order to ensure that the auxiliary device maintains balance with the product during assembly and provides partial support, this utility model designs a tail end balance support seat 3 and a hydraulic cylinder support seat 4.

[0030] like Figure 1 As shown, the tail end balance support 3 includes a base plate 3-1, which is vertically welded to the end cap 1-3. The base plate 3-1 has a second threaded hole in the center, and a third bolt 3-2 is placed in the second threaded hole. By rotating the third bolt 3-2, the tail end height can be adjusted.

[0031] like Figure 4As shown, the cylinder support 4 includes a base 4-1. The side of the base 4-1 has an H-shaped structure. The upper part of the front of the base 4-1 is an isosceles trapezoidal shape, and the lower part is rectangular. Both ends of the rectangular part of the lower part of the base 4-1 are provided with holes 4-4. The holes 4-4 are aligned with any two adjacent rectangular mounting holes 1-5 on the square tube 1-2 and are fixed by pins. The center of the trapezoidal plate above the base 4-1 is provided with through holes 4-7, which are aligned with the noodle-shaped mounting holes 1-5 on both sides of the square tube 1-2 of the housing positioning part 1 and are fixed by pins. The mounting plate 4-2 is a circular plate. Several third threaded holes 4-5 are provided on the outer circumference of the circular surface of the mounting plate 4-2. Two symmetrical pin holes 4-6 are provided on both ends of the outer circle of the mounting plate 4-2 in one diameter direction. The through holes 4-7 are aligned with the pin holes 4-6 and are connected and fixed by positioning pins. Pressure blocks 4-3 are provided at the positioning pin fixing points on both sides of the mounting plate 4-2 and the top of the base 4-1. The pressure blocks 4-3 limit the mounting plate 4-2. Preferably, this can be replaced according to product requirements.

[0032] To ensure that the inner cylinder rotor can enter the machine housing smoothly and at a constant speed, a drive device is designed, which specifically includes a two-way hydraulic cylinder 5, a guide wheel assembly 7, an auxiliary device top plate 9, an adjusting block 8, and a movable joint 6.

[0033] like Figure 1 As shown, the bidirectional hydraulic cylinder 5 includes an oil pump and a cylinder. The cylinder has two oil injection holes at the front and rear, which have a push-pull effect and realize the versatility of disassembly and assembly. The flange face of the cylinder is connected to the third threaded hole 4-5 of the mounting plate 4-2 by the fourth bolt, so as to realize the connection and fixation of the cylinder and the cylinder support 4.

[0034] The movable joint 6 has a structure similar to the hinged seat. One end of the movable joint 6 near the cylinder support 4 has a threaded hole that mates with the push rod of the bidirectional hydraulic cylinder 5. The other end of the movable joint 6 has a first groove at its center, with holes on both sides of the first groove. One end of the adjusting block 8 is welded to the top plate 9 of the auxiliary device, and the other end of the adjusting block 8 has a hole that fits into the first groove. The movable joint 6 and the adjusting block 8 are hinged together by a screw. The guide wheel assembly 7 includes rollers and a support block. The adjusting block 8 passes through the guide wheel assembly 7 and connects to the movable joint 6. The adjusting block 8 has a second groove and a fourth threaded hole. The guide wheel assembly 7 is placed in the second groove and fixed to the adjusting block 8 by bolts.

[0035] The working principle of this utility model includes the following steps. S1: After installing the rotor and inner partition into the outer partition, lock the upper and lower outer partition assemblies, and install the lifting ring onto the inner cylinder rotor. Lift the inner cylinder rotor as a whole to the assembly site. At this time, the cylindrical casing has been leveled and fixed completely.

[0036] S2: Weld the transition connecting plate 1-1 in the housing positioning part 1 to one end of the square tube 1-2, weld the end cap 1-3 to the other end of the square tube 1-2, weld the bottom plate 3-1 to the end cap 1-3 at a 90° angle, attach the reinforcing rib plate 1-4 to the stress position, and install one end of the transition connecting plate 1-1 onto the connecting plate.

[0037] S3: Install the mounting plate 4-2 and pressure block 4-3 in the cylinder support 4 onto the base 4-1, align the holes of the base 4-1 and the square tube 1-2, and use the pin to install the whole onto the square tube 1-2.

[0038] S4: Weld the top plate 9 of the auxiliary device to the adjusting block 8 at a 90° angle. Pass the adjusting block 8 through the guide wheel assembly 7, ensuring that the groove of the adjusting block 8 is locked in the guide wheel assembly 7. Insert the screw from the upper hole of the guide wheel assembly 7 and screw it into the threaded hole of the adjusting block 8. Connect the adjusting block 8 to the movable joint 6.

[0039] S5: Connect and fix the cylinder flange face to the mounting plate 4-2 of the cylinder support 4, and connect the push rod of the bidirectional hydraulic cylinder 5 through the mounting plate 4-2 to the movable joint 6.

[0040] S6: Connect and fix the arc connecting plate 2 to the non-motorized end face of the housing, ensuring that the arc surface of the arc connecting plate 2 is flush with the arc surface of the inner cavity of the housing.

[0041] S7: Hoist the inner cylinder rotor assembly to the non-motorized end of the machine housing, and slowly move the inner cylinder rotor assembly laterally into the machine housing until the arc surface of the inner cylinder rotor is on the same vertical line as the inner cavity surface of the machine housing. Slowly push the inner cylinder rotor assembly in and stop after contact.

[0042] S8: Readjust the position of the cylinder support seat 4 according to the actual position, and adjust the height of the tail end balance support seat 3 to ensure that the bolts achieve the support effect.

[0043] S9: Install the oil pump onto the oil cylinder and perform pressurization. Pressurization should be slow and stepwise until the top plate 9 of the auxiliary device is in contact with the rear end face of the inner cylinder rotor. Measure the movement gap using a laser rangefinder to form "real gap feedback" of the inner cylinder rotor's movement, improving the accuracy and quality control of the movement process. Adjust the screws on the pulley block and the tail bolts according to the gap until the top plate 9 of the auxiliary device is fully in contact. After contact, apply pressure. During the movement, pay close attention to the feeding situation. Remove the inner cylinder rotor hoisting position when it is about to interfere with the machine casing as the feeding distance increases. After the first push, pull it out to check the contact position. Only after confirming there are no issues can it be assembled into place.

[0044] S10: After assembly, tighten the bolts connecting the housing and the inner cylinder rotor, disassemble the auxiliary device and perform corresponding tests.

[0045] S11: When disassembling, install the auxiliary device according to the above method, pull it outward with the hydraulic cylinder, and gradually install the lifting lugs on the inner cylinder rotor for hoisting and disassembly.

[0046] The advantages and positive effects of this utility model are: 1. The device of this utility model meets the modular and rapid assembly and disassembly requirements of the limited working space of offshore platforms, has multi-dimensional constraint compensation function in the assembly process, improves assembly efficiency and assembly quality, and avoids major quality hazards that may exist in the assembly process.

[0047] 2. This utility model realizes the feasibility of rapid disassembly and assembly of the inner cylinder rotor of the compact natural gas compressor on offshore platforms, breaking the traditional assembly method and effectively meeting the requirements of high-quality assembly and reliable operation of the unit.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A disassembly and assembly device for the inner cylinder rotor of an offshore natural gas compressor, characterized in that: The device includes a housing positioning part, one end of which is connected to an arc-shaped connecting plate. The arc-shaped connecting plate can be replaced with different arcs depending on the size of the compressor. The other end of the housing positioning part is connected to a tail end balance support seat. The middle part of the housing positioning part is movably connected to the lower part of a hydraulic cylinder support seat. One end of the upper part of the hydraulic cylinder support seat is connected to a bidirectional hydraulic cylinder. The other end of the upper part of the hydraulic cylinder support seat is connected to one end of an adjusting block through a movable joint. The other end of the adjusting block is welded to an auxiliary device top plate. The guide wheel assembly passes through the adjusting block and is then fixed.

2. The disassembly and assembly device for the inner cylinder rotor of an offshore natural gas compressor according to claim 1, characterized in that: The housing positioning part includes a square tube, one end of which is welded with a transition connecting plate, and the other end of which is welded with a head cover plate. The square tube has a plurality of evenly distributed strip-shaped mounting holes on a pair of parallel surfaces.

3. The disassembly and assembly device for the inner cylinder rotor of an offshore natural gas compressor according to claim 2, characterized in that: Multiple reinforcing ribs are welded at the connection between the transition connecting plate and the square tube.

4. A disassembly and assembly device for the inner cylinder rotor of an offshore natural gas compressor according to claim 2 or 3, characterized in that: The arc-shaped connecting plate is a square plate with a guide arc surface on its upper part. The arc-shaped connecting plate is stepped in shape. The thickness of the guide arc surface is greater than that of the lower plane of the arc-shaped connecting plate. The plane of the arc-shaped connecting plate is provided with a plurality of first connecting holes and round holes. The transition connecting plate is provided with a plurality of second connecting holes. The first connecting holes are aligned with the second connecting holes and are fixed by a plurality of first bolts. The round holes are connected and fixed to the first threaded holes on the end face of the housing by second bolts.

5. A disassembly and assembly device for the inner cylinder rotor of an offshore natural gas compressor according to claim 2 or 3, characterized in that: The tail end balance support includes a base plate, which is welded perpendicularly to the end cap plate. The base plate has a second threaded hole in the center, and a third bolt is placed in the second threaded hole. Rotating the third bolt allows for tail end height adjustment.

6. A disassembly and assembly device for the inner cylinder rotor of an offshore natural gas compressor according to claim 2 or 3, characterized in that: The cylinder support includes a base with an H-shaped side. The upper part of the front of the base is an isosceles trapezoidal shape, and the lower part is rectangular. Holes are provided at both ends of the rectangular part of the lower part of the base. The holes are aligned with any two adjacent strip-shaped mounting holes on the square tube and fixed by pins. Through holes are provided at the center of the trapezoidal plate above the base. The mounting plate is a circular plate with several third threaded holes on its outer circumference. Two symmetrical pin holes are provided on both ends of the outer circle of the mounting plate along a diameter direction. The through holes are aligned with the pin holes and fixed by positioning pins. Pressure blocks are provided on both sides of the mounting plate at the positioning pin fixing points on the top of the base. The pressure blocks limit the position of the mounting plate.

7. A disassembly and assembly device for the inner cylinder rotor of an offshore natural gas compressor according to claim 6, characterized in that: The bidirectional hydraulic cylinder includes an oil pump and an oil cylinder. The oil cylinder has two oil injection holes, front and rear, and has a push-pull effect, achieving versatility in disassembly and assembly. The flange face of the oil cylinder is connected to the third threaded hole of the mounting plate by a fourth bolt, thereby connecting and fixing the oil cylinder to the oil cylinder support.

8. A disassembly and assembly device for the inner cylinder rotor of an offshore natural gas compressor according to any one of claims 1 to 3, characterized in that: The movable joint has a threaded hole at one end near the cylinder support seat. The threaded hole is connected to the push rod of the bidirectional hydraulic cylinder. The other end of the movable joint has a first groove at its center, and there are matching holes on both sides of the first groove.

9. A disassembly and assembly device for the inner cylinder rotor of an offshore natural gas compressor according to claim 8, characterized in that: One end of the adjustment block is welded to the top plate of the auxiliary device, and the other end of the adjustment block has a hole that is embedded in the first groove. The movable joint is hinged to the adjustment block by a screw.

10. A disassembly and assembly device for the inner cylinder rotor of an offshore natural gas compressor according to any one of claims 1 to 3, characterized in that: The guide wheel assembly includes rollers and a support block. The adjustment block passes through the guide wheel assembly and is connected to the movable joint. The adjustment block is provided with a second groove and a fourth threaded hole. The guide wheel assembly is placed in the second groove and fixed to the adjustment block by bolts.

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