An assembly tool for coaxial adjustable expander and a method of using the same

Abstract

The present application relates to the technical field of expander, and particularly relates to coaxiality adjustable expander assembly tool and using method thereof, the coaxiality adjustable expander assembly tool includes special false shaft, special false shaft rotating plate, first false bearing support, second false bearing support, third false bearing support, special bearing lifting ring frame, special mechanical seal lifting ring frame, special extension cylinder shaft, special shaft locking cylinder frame and special shaft locking fixed cylinder;Through special false shaft, special false shaft rotating plate, first false bearing support, second false bearing support and third false bearing support, cooperate with dial gauge, complete coaxiality adjustment of expander, use special mechanical seal lifting ring frame to hoist mechanical seal assembly, use special bearing lifting ring frame to hoist bearing assembly;So coaxiality adjustment can be carried out during assembly process, and the problem of expander key part assembly difficulty is solved.

Description

Technical Field

[0001] This invention relates to the field of expander technology, and in particular to an assembly fixture for an expander with adjustable coaxiality and its usage method. Background Technology

[0002] An organic working fluid expander is a rotary power machine that converts the energy of organic working fluid into mechanical work, and is mainly used for low-temperature heat recovery.

[0003] The size of the dynamic and static seal clearance is one of the key factors affecting the aerodynamic efficiency of an expander. Excessive interstage seal clearance will significantly reduce aerodynamic efficiency. Using an expander with adjustable coaxiality can improve the coaxiality of the dynamic and static seal clearance assembly, reducing airflow losses during unit operation. However, this type of expander requires coaxiality adjustment during commissioning, and the axial positions of key components such as mechanical seals and bearings are close to the cylinder body cavity, presenting assembly difficulties. Therefore, a dedicated assembly fixture is needed. Summary of the Invention

[0004] The purpose of this invention is to provide a coaxiality adjustable expander assembly fixture and its usage method, which can perform coaxiality adjustment during the assembly process and solve the problem of difficult assembly of key expander components.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a coaxiality adjustable expander assembly fixture, including a dedicated dummy shaft, a dedicated dummy shaft rotating plate, a first dummy bearing support, a second dummy bearing support, a third dummy bearing support, a dedicated bearing lifting ring frame, a dedicated mechanical seal lifting ring frame, a dedicated extension cylinder shaft, a dedicated locking cylinder frame, and a dedicated locking cylinder fixing cylinder.

[0006] The dedicated dummy shaft rotating plate is detachably mounted on one side of the dedicated dummy shaft; the first dummy bearing support, the second dummy bearing support, and the third dummy bearing support are used to cooperate with the dedicated dummy shaft to achieve coaxiality adjustment during the assembly process of the coaxiality adjustable expander; the dedicated bearing lifting ring frame is used for lifting the bearing during the assembly and disassembly of the coaxiality adjustable expander bearing; the dedicated mechanical seal lifting ring frame is used for lifting the mechanical seal during the assembly and disassembly of the coaxiality adjustable expander mechanical seal; the dedicated extension cylinder shaft is used for auxiliary guidance during the assembly and disassembly of the coaxiality adjustable expander mechanical seal and bearing; the dedicated locking cylinder frame is used for locking the radial relative position of the rotor assembly in the nozzle ring seat during the overall hoisting assembly and disassembly of the coaxiality adjustable expander nozzle ring seat and rotor assembly; the dedicated locking cylinder fixing cylinder is detachably mounted on one side of the dedicated locking cylinder frame.

[0007] The special dummy shaft rotating plate includes a circular plate and a handle; the handle is fixedly connected to the circular plate and is located on one side of the circular plate.

[0008] The special bearing lifting ring frame includes two arc-shaped connecting plates and two L-shaped plates; the two L-shaped plates are fixedly connected to the two arc-shaped connecting plates respectively, and are located on one side of the two arc-shaped connecting plates respectively.

[0009] The special mechanical seal lifting ring frame includes an annular connecting plate, two cuboid support rods, and two cylindrical push-pull rods; the two cuboid support rods are respectively fixedly connected to the annular connecting plate and are located on the side of the annular connecting plate; the two cylindrical push-pull rods are respectively fixedly connected to the two cuboid support rods and are located on one side of the two cuboid support rods.

[0010] The special locking cylinder frame includes an intermediate cylinder and two support frames; the two support frames are fixedly connected to the intermediate cylinder and are symmetrically arranged on both sides of the intermediate cylinder.

[0011] Secondly, the present invention also provides a method for using a coaxiality adjustable expander assembly fixture, the specific steps of which include:

[0012] Assemble the intake and exhaust cylinders together, and install the center-parting seam pin.

[0013] Securely install the first dummy bearing support, the second dummy bearing support, the special dummy shaft, and the bearing housing;

[0014] Install the dial indicator onto the end face of the dedicated dummy shaft;

[0015] The special dummy shaft rotating plate is installed on the end face of the special dummy shaft with bolts. The special dummy shaft is rotated by the special dummy shaft rotating plate, and the circular runout of the first bearing mounting surface of the bearing housing is measured. The bearing housing axis is adjusted by adjusting the number of specially made adjusting shims of the bearing housing.

[0016] Securely install the third dummy bearing support, and remove the exhaust cylinder and the second dummy bearing support; securely install the lower half of the nozzle ring seat, which consists of the interstage air seal, nozzle ring, nozzle ring positioning key, nozzle ring adjusting block, nozzle ring pressure block, and nozzle ring special adjusting shim.

[0017] The nozzle ring seat of the grinding mill is assembled with the saddle pin, and the coaxiality and clearance value of the interstage air seal and rotor assembly are adjusted.

[0018] Disassemble the lower half of the nozzle ring seat, install the rotor assembly into the lower half of the nozzle ring seat, assemble the upper half of the nozzle ring in sequence, and then assemble the upper and lower halves of the nozzle ring seat together.

[0019] The dedicated locking shaft cylinder frame is securely installed on the corresponding position of the nozzle ring seat using a detachable bolt structure, and the dedicated locking shaft fixing cylinder is securely installed on the dedicated locking shaft cylinder frame using a detachable bolt structure.

[0020] The rotor assembly and the nozzle ring seat are positioned radially by the radial positioning screws on the upper and lower sides of the circumference of the rotating special locking cylinder frame, and then the rotor assembly and the nozzle ring seat are positioned axially by the axial positioning screws.

[0021] The nozzle ring seat and rotor assembly are hoisted and assembled to the corresponding position of the intake cylinder. The nozzle ring seat is then reassembled with the saddle pin and the standard fasteners are tightened.

[0022] Assemble the exhaust cylinder and intake cylinder together, reinstall the center-parting seam pin for positioning, and tighten the standard fasteners.

[0023] The dedicated extension cylinder shaft can be detachably connected to the end face of the rotor assembly using connecting bolts;

[0024] The special mechanical seal lifting ring frame is detachably connected to the mechanical seal with bolts. The lifting ring is installed to the lifting ring hole. The mechanical seal is then moved along the special extension cylinder shaft to the mechanical seal assembly position inside the exhaust cylinder using the special mechanical seal lifting ring frame. The standard fasteners of the mechanical seal are tightened, and then the special mechanical seal lifting ring frame is removed.

[0025] The special bearing lifting ring frame is detachably connected to the bearing with bolts. The lifting ring is installed to the lifting hole of the lifting ring. The bearing is moved along the special extension cylinder shaft to the bearing assembly position in the inner cavity of the exhaust cylinder through the special bearing lifting ring frame. The standard fasteners of the bearing are tightened. Finally, the special bearing lifting ring frame is removed.

[0026] This invention discloses a coaxiality adjustable expander assembly fixture and its usage method. Using a dedicated dummy shaft, a dedicated dummy shaft rotating plate, a first dummy bearing support, a second dummy bearing support, and a third dummy bearing support, along with a dial indicator, the coaxiality of the expander is adjusted. With the auxiliary guidance of a dedicated extension cylinder shaft, a dedicated mechanical seal lifting ring is used to lift the mechanical seal to the mechanical seal installation position inside the exhaust cylinder and secure it. The dedicated bearing lifting ring is then used to rotate the bearing along the dedicated extension cylinder shaft to the bearing assembly position inside the exhaust cylinder, completing the assembly of key expander components. This allows for coaxiality adjustment during assembly and solves the problem of difficult assembly of key expander components. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0028] Figure 1 This is a general sectional view of the expander.

[0029] Figure 2 This is a schematic diagram of the assembly of the bearing housing.

[0030] Figure 3This is a schematic diagram of the bearing housing.

[0031] Figure 4 yes Figure 3 A cross-sectional view along the AA direction.

[0032] Figure 5 This is a schematic diagram of the structure of a special dummy shaft rotating plate.

[0033] Figure 6 This is an assembly sectional view of the lower half of the nozzle ring seat.

[0034] Figure 7 yes Figure 6 A cross-sectional view along the BB direction.

[0035] Figure 8 This is a schematic diagram of the lower half of the nozzle ring seat disassembled.

[0036] Figure 9 This is a schematic diagram of the assembly of a special locking shaft sleeve frame and a special locking shaft fixing sleeve.

[0037] Figure 10 This is a schematic diagram of the assembly direction of the nozzle ring seat and the rotor assembly.

[0038] Figure 11 This is a structural diagram of a special locking shaft sleeve frame.

[0039] Figure 12 This is a structural diagram of a special locking shaft fixing cylinder.

[0040] Figure 13 This is a schematic diagram showing the assembly direction of the mechanical seal and the bearing.

[0041] Figure 14 This is a cross-sectional view of the mechanical seal and bearing assembly.

[0042] Figure 15 This is a structural schematic diagram of a dedicated extension cylinder shaft.

[0043] Figure 16 This is a structural schematic diagram of a special mechanical seal lifting ring frame.

[0044] Figure 17 This is a structural schematic diagram of a special bearing lifting ring frame.

[0045] Figure 18 This is a partial flowchart of the method of using a coaxial adjustable expander assembly fixture according to the present invention.

[0046] Figure 19 This is another part of the flowchart of the method of using a coaxial adjustable expander assembly tooling of the present invention.

[0047] 101-Dedicated dummy shaft, 102-Dedicated dummy shaft rotating plate, 103-First dummy bearing support, 104-Second dummy bearing support, 105-Third dummy bearing support, 106-Dedicated bearing lifting ring frame, 107-Dedicated mechanical seal lifting ring frame, 108-Dedicated extension cylinder shaft, 109-Dedicated locking shaft cylinder frame, 110-Dedicated locking shaft fixing cylinder, 111-Circular plate, 112-Handle, 113-Arc connecting plate, 114-L-shaped plate, 115-Annular connecting plate, 116-Cuboid support rod, 117-Cylindrical push-pull rod, 118-Intermediate cylinder, 119-Support frame, 201-Intake cylinder, 202-Exhaust cylinder, 203-Nozzle ring, 204-Nozzle ring seat, 205-Bearing seat, 206-First Bearing, 207-Second Bearing, 208-First Mechanical Seal, 209-Second Mechanical Seal, 210-Main Shaft, 211-Turbine, 212-Bearing Housing First Bearing Mounting Surface, 213-Dial Indicator, 214-Bearing Housing Special Adjusting Shim, 215-Bearing Housing Adjusting Block, 216-Fastener, 217-Interstage Seal, 218-Interstage Seal Split Face Locating Pin, 219-Nozzle Ring Split Face Locating Pin, 220-Nozzle Ring Pressing Block, 221-Nozzle Ring Adjusting Block, 222-Nozzle Ring Adjusting Shim, 223-Nozzle Ring Locating Key, 224-Split Face Seam Pin, 225-Nozzle Ring Seat Assembly Seam Pin, 226-Radial Locating Screw, 227-Axial Locating Screw, 228-Connecting Bolt. Detailed Implementation

[0048] Please see Figures 1-19 In a first aspect, the present invention provides a coaxiality adjustable expander assembly fixture:

[0049] It includes a dedicated dummy shaft 101, a dedicated dummy shaft rotating plate 102, a first dummy bearing support 103, a second dummy bearing support 104, a third dummy bearing support 105, a dedicated bearing lifting ring frame 106, a dedicated mechanical seal lifting ring frame 107, a dedicated extension cylinder shaft 108, a dedicated locking cylinder frame 109, and a dedicated locking cylinder fixing cylinder 110.

[0050] The dedicated dummy shaft rotating plate 102 is detachably mounted on one side of the dedicated dummy shaft 101; the first dummy bearing support 103, the second dummy bearing support 104, and the third dummy bearing support 105 are used to cooperate with the dedicated dummy shaft 101 to achieve coaxiality adjustment during the assembly process of the coaxiality adjustable expander; the dedicated bearing lifting ring 106 is used to lift the bearing during the assembly and disassembly of the coaxiality adjustable expander bearing; the dedicated mechanical seal lifting ring 107 is used to lift the mechanical seal during the assembly and disassembly of the coaxiality adjustable expander mechanical seal; the dedicated extension cylinder shaft 108 is used for auxiliary guidance during the assembly and disassembly of the coaxiality adjustable expander mechanical seal and bearing; the dedicated locking cylinder 109 is used to lock the radial relative position of the rotor assembly in the nozzle ring seat 204 during the overall hoisting assembly and disassembly of the coaxiality adjustable expander nozzle ring seat 204 and rotor assembly; the dedicated locking cylinder 110 is detachably mounted on one side of the dedicated locking cylinder 109.

[0051] In this embodiment, the special dummy shaft 101 is used for coaxiality adjustment during the assembly of the coaxiality adjustable expander. The special dummy shaft 101 is an optical shaft, and two threaded holes evenly distributed around its circumference are provided on one end face for rotational assistance of the special dummy shaft 101.

[0052] The dedicated dummy shaft rotating plate 102 is used for coaxiality adjustment during the assembly process of the coaxiality adjustable expander.

[0053] The first dummy bearing support 103, the second dummy bearing support 104, and the third dummy bearing support 105 are used for coaxiality adjustment during the assembly of the coaxiality adjustable expander; the first dummy bearing support 103, the second dummy bearing support 104, and the third dummy bearing support 105 are hollow outer circular flange connection structures, and the coaxiality between the inner circle and the outer mating circle is within 0.02mm.

[0054] The special bearing lifting ring 106 is used for lifting the bearing during the assembly and disassembly of the expander bearing.

[0055] The special mechanical seal lifting ring 107 is used for lifting the mechanical seal during the assembly and disassembly of the expander mechanical seal;

[0056] The dedicated extension cylinder shaft 108 is used for auxiliary guidance during the assembly and disassembly of the mechanical seal and bearing of the expander; an annular step is provided on one side of the dedicated extension cylinder shaft 108 for installation and positioning with the main shaft 210 of the expander, and a through hole is provided in the middle of the annular step for bolt connection between the extension cylinder shaft and the main shaft 210 of the expander; the other side of the dedicated extension cylinder shaft 108 is set as a hollow cylinder to facilitate the installation of the dedicated extension cylinder shaft 108 and the main shaft 210 of the expander with the connecting bolt 228.

[0057] The dedicated locking cylinder 109 is used to lock the radial relative position of the rotor assembly in the nozzle ring seat 204 when the expander nozzle ring seat 204 and rotor assembly are hoisted, assembled and disassembled as a whole.

[0058] The dedicated locking shaft fixing cylinder 110 is used to assist in locking the axial relative position of the rotor assembly in the nozzle ring seat 204 during the overall hoisting, assembly and disassembly of the expander nozzle ring seat 204 and the rotor assembly. The dedicated locking shaft fixing cylinder 110 is a hollow cylinder. One end of the dedicated locking shaft fixing cylinder 110 has an outer circular flange connection structure for bolting to the dedicated locking shaft cylinder frame 109. The other end of the dedicated locking shaft fixing cylinder 110 has a through hole in the middle for axial positioning with the rotor assembly.

[0059] Using the dedicated dummy shaft 101, the dedicated dummy shaft rotating plate 102, the first dummy bearing support 103, the second dummy bearing support 104, and the third dummy bearing support 105, in conjunction with the dial indicator 213, the coaxiality adjustment of the expander is completed. With the auxiliary guidance of the dedicated extension cylinder shaft 108, the dedicated mechanical seal lifting ring 107 is used to lift the mechanical seal to the mechanical seal installation position inside the exhaust cylinder 202 and tighten it. The dedicated bearing lifting ring 106 is used to rotate the bearing along the dedicated extension cylinder shaft 108 to the bearing assembly position inside the exhaust cylinder 202, completing the assembly of the key components of the expander. Thus, coaxiality adjustment can be performed during the assembly process, and the problem of difficult assembly of key components of the expander is solved.

[0060] Furthermore, the dedicated dummy shaft rotating plate 102 includes a circular plate 111 and a handle 112; the handle 112 is fixedly connected to the circular plate 111 and is located on one side of the circular plate 111.

[0061] In this embodiment, the circular plate 111 and the handle 112 are connected by welding in a non-detachable manner. The end face of the circular plate 111 is provided with two threaded holes evenly distributed around the circumference for detachable connection with the special dummy shaft 101 bolt.

[0062] Furthermore, the special bearing lifting ring 106 includes two arc-shaped connecting plates 113 and two L-shaped plates 114; the two L-shaped plates 114 are respectively fixedly connected to the two arc-shaped connecting plates 113 and are respectively located on one side of the two arc-shaped connecting plates 113.

[0063] In this embodiment, the special bearing lifting ring frame 106 is a split mirror matching structure, and the connection and mounting holes with the parts can be set to be compatible with the lifting of bearings with different pitches. Each special bearing lifting ring frame 106 includes the arc connecting plate 113 and the L-shaped plate 114, which are connected by welding in a non-detachable manner. The L-shaped plate 114 is provided with lifting ring mounting holes for lifting ring installation.

[0064] Furthermore, the special mechanical seal lifting ring 107 includes an annular connecting plate 115, two cuboid support rods 116, and two cylindrical push-pull rods 117; the two cuboid support rods 116 are respectively fixedly connected to the annular connecting plate 115 and are respectively located on the side of the annular connecting plate 115; the two cylindrical push-pull rods 117 are respectively fixedly connected to the two cuboid support rods 116 and are respectively located on one side of the two cuboid support rods 116.

[0065] In this embodiment, the special mechanical seal lifting ring frame 107 is an integral structure, including the annular connecting plate 115, two cuboid support rods 116, and two cylindrical push-pull rods 117. The two cuboid support rods 116 are symmetrically distributed on both sides of the annular connecting plate 115 and are connected by welding in a non-detachable manner. The two cylindrical push-pull rods 117 are respectively set at the ends of the two cuboid support rods 116 by welding in a non-detachable manner. Lifting ring mounting holes are provided on the upper part of the cuboid support rods 116 for lifting ring installation, and the cylindrical push-pull rods 117 are provided for easy operation.

[0066] Furthermore, the dedicated locking cylinder frame 109 includes an intermediate cylinder 118 and two support frames 119; the two support frames 119 are respectively fixedly connected to the intermediate cylinder 118 and are symmetrically arranged on both sides of the intermediate cylinder 118.

[0067] In this embodiment, the intermediate cylinder 118 has a through hole in the middle for the main shaft 210 to pass through, and the end face of the intermediate cylinder 118 has a threaded through hole for the bolt connection between the special locking shaft cylinder frame 109 and the special locking shaft fixing cylinder 110. The circumference of the intermediate cylinder 118 has a threaded through hole for the radial positioning of the special locking shaft cylinder frame 109 and the rotor assembly. The support frame 119 has threaded through holes on both sides for detachable bolt connection with the nozzle ring seat 204. The intermediate cylinder 118 and the support frame 119 are connected by welding in a non-detachable manner, and reinforcing ribs connected by welding in a non-detachable manner are provided on both sides to enhance the connection strength. This invention ensures the gap value of the interstage air seal 217 of the expander by using a special tooling assembly kit, avoiding the deviation of the dynamic and static air seal gap caused by machining errors, and greatly ensuring pneumatic efficiency. At the same time, it also solves the problem of difficult assembly of the mechanical seal and bearing, which are key components of the expander, and ensures the high coaxiality assembly accuracy of the mechanical seal and bearing.

[0068] The coaxiality adjustable expander includes an intake cylinder 201, an exhaust cylinder 202 fixedly mounted on the intake cylinder 201, and a rotor assembly with a turbine 211 fixedly mounted on it. The exhaust cylinder 202 has an inner shell and an outer shell. A split nozzle ring seat 204 is provided inside the exhaust cylinder 202. A nozzle ring 203 is provided on the nozzle ring seat 204. A coaxiality adjustable bearing seat 205 is fixed on the intake shell. One end of the rotor assembly is supported by a first bearing 206 mounted on the bearing seat 205, and the other end of the rotor assembly is supported by a bearing mounted on the inner shell of the exhaust shell. The intake cylinder 201 and exhaust cylinder 202 are fitted with a split-face seam pin 224 to ensure the reassembly of the intake cylinder 201 and exhaust cylinder 202. The nozzle ring seat 204 is designed with a split face, with the upper and lower halves connected by screws and fixed to the intake cylinder 201 as a whole. The nozzle ring seat 204 and the intake cylinder 201 are fitted with a nozzle ring seat seam pin 225 to ensure the reassembly of the nozzle ring seat 204 and the cylinder body. The bearing seat 205 is provided with three bearing seat adjusting blocks 215 and a special bearing seat adjusting shim 214 to adjust the coaxiality of the bearing seat 205 and the bearing seat 205 of the exhaust cylinder 202, which are two horizontally symmetrical and one directly below. The bearing seat adjusting blocks 215 are connected to the bearing seat 205 by fasteners 216. Between the nozzle ring 203 and the nozzle ring seat 204, there is a nozzle ring positioning key 223, a nozzle ring adjusting block 221, a nozzle ring pressing block 220, and a nozzle ring adjusting shim 222. The nozzle ring 203 and the nozzle ring seat 204 are connected by standard fasteners of corresponding specifications to adjust the coaxiality of the interstage air seal 217 and the cylinder block.

[0069] Secondly, the present invention also provides a method for using a coaxiality adjustable expander assembly fixture, the specific steps of which include:

[0070] The S1 assembly includes an intake cylinder 201 and an exhaust cylinder 202, and is fitted with a center-parting seam pin 224.

[0071] S2 securely installs the first dummy bearing support 103, the second dummy bearing support 104, the special dummy shaft 101, and the bearing housing 205;

[0072] S3 mounts the dial indicator 213 onto the end face of the dedicated dummy shaft 101;

[0073] S4 The special dummy shaft rotating plate 102 is installed on the end face of the special dummy shaft 101 by bolts. The special dummy shaft 101 is rotated by the special dummy shaft rotating plate 102 to measure the circular runout of the first bearing mounting surface 212 of the bearing seat. The axis of the bearing seat 205 is adjusted by adjusting the number of special adjusting shims 214 of the bearing seat.

[0074] S5 securely installs the third dummy bearing support 105, removes the exhaust cylinder 202 and the second dummy bearing support 104; securely installs the lower half of the nozzle ring seat 204, which consists of the interstage air seal 217, nozzle ring 203, nozzle ring positioning key 223, nozzle ring adjusting block 221, nozzle ring pressing block 220, and a special adjusting shim for the nozzle ring 203.

[0075] S6 is equipped with the nozzle ring seat assembly and the saddle pin 225, and the interstage air seal 217 is adjusted to be coaxial and clearance value of the rotor assembly.

[0076] S7 removes the lower half of the nozzle ring seat 204, installs the rotor assembly into the lower half of the nozzle ring seat 204, assembles the upper half of the nozzle ring 203 in sequence, and then assembles the upper and lower halves of the nozzle ring seat 204 together.

[0077] S8 securely installs the special locking shaft cylinder 109 to the corresponding position of the nozzle ring seat 204 through a detachable bolt structure, and securely installs the special locking shaft fixing cylinder 110 to the special locking shaft cylinder 109 through a detachable bolt structure.

[0078] The S9 rotary special locking cylinder frame 109 uses radial positioning screws 226 on both sides of the circumference to position the rotor assembly and the nozzle ring seat 204 radially, and then uses axial positioning screws 227 to position the rotor assembly and the nozzle ring seat 204 axially.

[0079] S10 hoists and assembles the nozzle ring seat 204 and the rotor assembly as a whole to the corresponding position of the intake cylinder 201, reassembles the nozzle ring seat assembly with the saddle pin 225, and tightens the standard fasteners.

[0080] S11 combines the exhaust cylinder 202 with the intake cylinder 201, reinstalls the center-parting seam pin 224 for positioning, and tightens the standard fasteners.

[0081] S12 can be detachably connected to the end face of the rotor assembly via connecting bolts 228;

[0082] S13 connects the special mechanical seal lifting ring 107 to the mechanical seal detachably with bolts, installs the lifting ring to the lifting ring hole, and moves the mechanical seal along the special extension cylinder shaft 108 to the mechanical seal assembly position inside the exhaust cylinder 202 through the special mechanical seal lifting ring 107. Tighten the standard fasteners of the mechanical seal, and then remove the special mechanical seal lifting ring 107.

[0083] The mechanical seal refers to the first mechanical seal 208 and the second mechanical seal 209.

[0084] S14 connects the special bearing lifting ring 106 to the bearing detachably with bolts, installs the lifting ring to the lifting ring hole, and moves the bearing along the special extension cylinder shaft 108 to the bearing assembly position inside the exhaust cylinder 202 through the special bearing lifting ring 106. Tightens the standard bearing fasteners, and finally disassembles the special bearing lifting ring 106.

[0085] The bearings refer to the first bearing 206 and the second bearing 207.

[0086] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A coaxiality-adjustable expander assembly fixture, characterized in that, It includes a dedicated dummy shaft, a dedicated dummy shaft rotating plate, a first dummy bearing support, a second dummy bearing support, a third dummy bearing support, a dedicated bearing lifting ring frame, a dedicated mechanical seal lifting ring frame, a dedicated extension cylinder shaft, a dedicated locking cylinder frame, and a dedicated locking cylinder fixing cylinder; The dedicated dummy shaft rotating plate is detachably mounted on one side of the dedicated dummy shaft; the first dummy bearing support, the second dummy bearing support, and the third dummy bearing support are used to cooperate with the dedicated dummy shaft to achieve coaxiality adjustment during the assembly process of the coaxiality adjustable expander; the dedicated bearing lifting ring frame is used for lifting the bearing during the assembly and disassembly of the coaxiality adjustable expander bearing; the dedicated mechanical seal lifting ring frame is used for lifting the mechanical seal during the assembly and disassembly of the coaxiality adjustable expander mechanical seal; the dedicated extension cylinder shaft is used for auxiliary guidance during the assembly and disassembly of the coaxiality adjustable expander mechanical seal and bearing; the dedicated locking cylinder frame is used for locking the radial relative position of the rotor assembly in the nozzle ring seat during the overall hoisting assembly and disassembly of the coaxiality adjustable expander nozzle ring seat and rotor assembly; the dedicated locking cylinder fixing cylinder is detachably mounted on one side of the dedicated locking cylinder frame.

2. The coaxiality adjustable expander assembly fixture as described in claim 1, characterized in that, The special dummy shaft rotating plate includes a circular plate and a handle; the handle is fixedly connected to the circular plate and is located on one side of the circular plate.

3. The coaxiality adjustable expander assembly fixture as described in claim 2, characterized in that, The special bearing lifting ring frame includes two arc-shaped connecting plates and two L-shaped plates; the two L-shaped plates are fixedly connected to the two arc-shaped connecting plates respectively, and are located on one side of the two arc-shaped connecting plates respectively.

4. The coaxiality adjustable expander assembly fixture as described in claim 3, characterized in that, The special mechanical seal lifting ring frame includes an annular connecting plate, two cuboid support rods, and two cylindrical push-pull rods; the two cuboid support rods are respectively fixedly connected to the annular connecting plate and are located on the side of the annular connecting plate; the two cylindrical push-pull rods are respectively fixedly connected to the two cuboid support rods and are located on one side of the two cuboid support rods.

5. The coaxiality adjustable expander assembly fixture as described in claim 4, characterized in that, The special locking cylinder frame includes an intermediate cylinder and two support frames; the two support frames are respectively fixedly connected to the intermediate cylinder and symmetrically arranged on both sides of the intermediate cylinder.

6. A method of using a coaxiality adjustable expander assembly fixture, applied to the coaxiality adjustable expander assembly fixture as described in any one of claims 1-5; characterized in that, The specific steps include: Assemble the intake and exhaust cylinders together, and install the center-parting seam pin. Securely install the first dummy bearing support, the second dummy bearing support, the special dummy shaft, and the bearing housing; Install the dial indicator onto the end face of the dedicated dummy shaft; The special dummy shaft rotating plate is installed on the end face of the special dummy shaft with bolts. The special dummy shaft is rotated by the special dummy shaft rotating plate, and the circular runout of the first bearing mounting surface of the bearing housing is measured. The bearing housing axis is adjusted by adjusting the number of specially made adjusting shims of the bearing housing. Securely install the third dummy bearing support, and remove the exhaust cylinder and the second dummy bearing support; securely install the lower half of the nozzle ring seat, which consists of the interstage air seal, nozzle ring, nozzle ring positioning key, nozzle ring adjusting block, nozzle ring pressure block, and nozzle ring special adjusting shim. The nozzle ring seat of the grinding mill is assembled with the saddle pin, and the coaxiality and clearance value of the interstage air seal and rotor assembly are adjusted. Disassemble the lower half of the nozzle ring seat, install the rotor assembly into the lower half of the nozzle ring seat, assemble the upper half of the nozzle ring in sequence, and then assemble the upper and lower halves of the nozzle ring seat together. The dedicated locking shaft cylinder frame is securely installed on the corresponding position of the nozzle ring seat using a detachable bolt structure, and the dedicated locking shaft fixing cylinder is securely installed on the dedicated locking shaft cylinder frame using a detachable bolt structure. The rotor assembly and the nozzle ring seat are positioned radially by the radial positioning screws on the upper and lower sides of the circumference of the rotating special locking cylinder frame, and then the rotor assembly and the nozzle ring seat are positioned axially by the axial positioning screws. The nozzle ring seat and rotor assembly are hoisted and assembled to the corresponding position of the intake cylinder. The nozzle ring seat is then reassembled with the saddle pin and the standard fasteners are tightened. Assemble the exhaust cylinder and intake cylinder together, reinstall the center-parting seam pin for positioning, and tighten the standard fasteners. The dedicated extension cylinder shaft can be detachably connected to the end face of the rotor assembly using connecting bolts; The special mechanical seal lifting ring frame is detachably connected to the mechanical seal with bolts. The lifting ring is installed to the lifting ring hole. The mechanical seal is then moved along the special extension cylinder shaft to the mechanical seal assembly position inside the exhaust cylinder using the special mechanical seal lifting ring frame. The standard fasteners of the mechanical seal are tightened, and then the special mechanical seal lifting ring frame is removed. The special bearing lifting ring frame is detachably connected to the bearing with bolts. The lifting ring is installed to the lifting hole of the lifting ring. The bearing is moved along the special extension cylinder shaft to the bearing assembly position in the inner cavity of the exhaust cylinder through the special bearing lifting ring frame. The standard fasteners of the bearing are tightened. Finally, the special bearing lifting ring frame is removed.

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