Vacuum pump rotor dismounting tool

Abstract

The utility model relates to a vacuum pump rotor dismounting tool, a vacuum pump comprises a pump shell, and a cavity used for placing a rotor is arranged in the pump shell; the rotor is positioned in the cavity; the rotor dismantling tool comprises a supporting frame, two bolt holes are formed in the bottom of the supporting frame, the supporting frame is placed on the top of a rotor, bolts penetrate through the bolt holes and then are screwed into the rotor, and the supporting frame is connected with the rotor; the top of the supporting frame is connected with a lifting ring, and the lifting ring is used for lifting the supporting frame. In the maintenance process, the vacuum pump rotor dismounting tool plays a role in fixing the rotor and pulling the rotor away from the vacuum pump. The tool can effectively assist the dismantling work of the vacuum pump rotor, and in the overhauling process, on one hand, the working process of dismantling the rotor is optimized, and on the other hand, the rotor is effectively protected.

Description

Technical Field

[0001] The utility model relates to the field of tooling, and particularly to a tooling for removing a vacuum pump rotor. Background Art

[0002] There is a strong magnetic force between the rotor of the vacuum pump and the motor. Therefore, during the process of removing the rotor, the rotor is extremely likely to be damaged or cannot be easily removed, resulting in damage to the motor. At the same time, the process of removing the rotor using the existing technology is very troublesome and the removal efficiency is low. Summary of the Utility Model

[0003] The utility model aims to overcome the above technical defects and provides a tooling for removing a vacuum pump rotor, which has the functions of fixing the rotor and pulling the rotor away from the vacuum pump.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a tooling for removing a vacuum pump rotor, the vacuum pump includes a pump housing, and a cavity for placing the rotor is provided in the pump housing; the rotor is located in the cavity;

[0005] The rotor removal tooling includes: a support frame, two bolt holes are provided at the bottom of the support frame, the support frame is placed on the top of the rotor, and after the bolt passes through the bolt hole, it is screwed into the rotor, and the support frame is connected to the rotor; the top of the support frame is connected to a lifting ring, and the lifting ring is used to lift the support frame. The top of the support frame is fixedly connected to the lifting ring, and at the same time, the support frame is connected to the rotor through bolts. When the support frame is lifted, the rotor and the support frame are lifted together, and the structure of the rotor will not be damaged.

[0006] Further, the support frame is composed of a U-shaped frame and a lifting ring mounting plate. The cross-section of the U-shaped frame is U-shaped. The U-shaped frame includes a first support arm and a second support arm arranged in parallel. There is an opening between the first support arm and the second support arm. One end of the first support arm far from the bottom surface of the U-shaped frame and one end of the second support arm far from the bottom surface of the U-shaped frame are fixedly connected through the lifting ring mounting plate.

[0007] Further, the rotor removal tooling further includes: 2 centering bushings and 4 centering pins. The rotor is composed of 2 rotor monomers. Among them, 2 centering pins are placed at the bottom of 1 rotor monomer, and 1 centering bushing is placed outside the 2 centering pins. First place the centering pins, and then place the centering bushing, which can ensure the centering of the rotor monomer and the centering bushing.

[0008] Further, the centering bushing is of an annular structure and is located under the rotor. After the rotor is slightly lifted through the support frame, the centering bushing can be placed under the rotor to play a role in protecting the rotor.

[0009] Further, each of the centering bushings is formed by splicing two semi-circular bushings.

[0010] Further, the centering bushing is made of polytetrafluoroethylene.

[0011] Further, it further includes a support plate for removing the pump casing. The support plate is composed of a bottom plate and four connecting plates. The bottom plate is provided with mounting holes penetrating through the bottom plate around it, and each of the connecting plates is provided with a through hole in the middle. The four connecting plates include two long plates and two short plates. The two long plates are arranged parallel to each other and perpendicular to the support plate. The two long plates are connected by the two short plates, and the two short plates are parallel to each other. The through holes on the two long plates are used to install long screws for lifting the support plate. Placing the support plate on the top of the pump casing and lifting the support plate can separate the pump casing from the pump housing part without damaging the structure of the pump casing.

[0012] This application also provides a method for using the above-mentioned vacuum pump rotor removal tooling:

[0013] Step 1: Remove the pump casing: Remove the hexagon socket head cap screws on the pump casing, place the support plate on the pump casing, pass the screws through the mounting holes and then screw them into the pump casing to connect the support plate to the top of the pump casing. Use long screws to connect the through holes in the middle of the two long plates on the support plate, tighten the nuts, and lift the long screws to lift the vacuum pump casing. Attention should be paid not to damage the sealing surface when lifting the pump casing. Before placing the pump casing, it is necessary to use a pin puller to pull out the pins, and the seals cannot be damaged during the process, and the exhaust flange should be disassembled.

[0014] Step 2: Remove the rotor: Remove the resolver screws and pull the resolver rotor. Place the support frame on the rotor. One of the bolt holes on the support frame is located at the center of the top of one rotor unit, and the other bolt hole is located at the center of the top of the other rotor unit. Pass the bolts through the bolt holes and then screw them into the rotor, slightly lift the rotor, place the centering pin under the rotor, place the centering bushing outside the centering pin, disassemble the centering pin, and extract the rotor. During this process, the rotor needs to be centered with the stator bushing. During the removal of the rotor, the space between the rotor and the rotor seat is strongly magnetic, and it is easy to fall off during the maintenance process. When reinstalling, it is easy to cause damage to the rotor (strong magnetic adsorption). Using the centering bushing can avoid damage to the rotor during the removal process.

[0015] Step 3: Reinstall the rotor. Before reinstalling the rotor, it is necessary to check whether all pipelines and coolant are clean. All sealing components used during the maintenance process must be lubricated with special lubricating oil for vacuum pumps, and new sealing components should be replaced. Place an O-ring on the vacuum pump housing, install the new rotor and the support frame, and screw in the positioning pin. Remove the positioning bushing, let the rotor drop completely, remove the positioning pin, replace the new washer, reinstall the rotor with a torque wrench, remove the support frame, install an O-ring on the rotor screw cover, reinstall the bolts and tighten them. The screws should rotate easily and freely without any noise.

[0016] Step 4: Assemble the pump housing: Replace the new sealing component at the position of the sealing component, install the support plate, lift the rotor pump housing, reinstall the bolts at the lower end of the rotor, fix the rotor on the screw, turn the rotor in the correct direction. If the rotor pump housing gets stuck on the screw, lift the rotor pump housing again and shake the rotor pump housing during the next lowering into the well. The rotor and the pump housing must be aligned, and remove the support plate from the rotor pump housing. Reinstall the O-ring and the exhaust flange, reinstall the socket head cap screws on the rotor pump housing, measure the clearance between the rotor pump housing and the rotor. If the clearance is outside the range value, reinstall it. Then assemble the rotor pump cover. First, install an O-ring on the top of the rotor, then install 16 M12×40 bolts and tighten them with an 87NM torque wrench. Finally, reinstall the vacuum pump motor assembly.

[0017] The vacuum pump is the 1288-P-1310 vacuum pump for the C9 separation unit. The tooling described in this application is applicable to the Flowserve vacuum pump and is used for the maintenance work of replacing the rotor for the rotor unit with a wheelbase of 180mm.

[0018] Compared with the prior art, the beneficial effects of the present utility model are:

[0019] During the maintenance process, the vacuum pump rotor removal tooling plays a role in fixing the rotor and removing the rotor from the vacuum pump. Using this tooling can effectively assist in the removal work of the vacuum pump rotor. During the maintenance process, on the one hand, it optimizes the work process of removing the rotor, and on the other hand, it effectively protects the rotor. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Among them:

[0022] Figure 1 It is a schematic structural diagram of the support plate;

[0023] Figure 2 is Figure 1 the top view of;

[0024] Figure 3 is the structural schematic diagram of the support frame;

[0025] Figure 4 is Figure 3 the top view of;

[0026] Figure 5 is the structural schematic diagram of the centering bushing;

[0027] Figure 6 is the top view of the centering bushing;

[0028] Figure 7 is the side view of the centering pin;

[0029] Figure 8 is the structural schematic diagram of the cooperation between the tooling and the vacuum pump;

[0030] Figure 9 is the structural schematic diagram of the pump housing;

[0031] In the figure: 1 is the rotor; 2 is the support frame; 21 is the U-shaped frame; 22 is the lifting ring mounting plate; 23 is the bolt hole; 3 is the bolt; 4 is the centering bushing; 5 is the lifting ring; 6 is the support plate; 61 is the bottom plate; 62 is the connecting plate; 63 is the mounting hole; 64 is the through hole; 7 is the centering pin; 10 is the pump housing. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0033] As Figures 1-9 shown, a tooling for removing the rotor of a vacuum pump, the vacuum pump includes a pump housing 10, and a cavity for placing the rotor 1 is provided in the pump housing 10; the rotor 1 is located in the cavity;

[0034] The rotor removal tooling includes: a support frame 2, two bolt holes 23 are provided at the bottom of the support frame 2, the support frame 2 is placed on the top of the rotor 1, and the bolt 3 passes through the bolt hole 23 and is screwed into the rotor 1, and the support frame 2 is connected to the rotor 1; the top of the support frame 2 is connected to the lifting ring 5, and the lifting ring 5 is used to lift the support frame 2. The top of the support frame 2 is fixedly connected to the lifting ring 5, and at the same time, the support frame 2 is connected to the rotor by bolts. When the support frame 2 is lifted, the rotor 1 and the support frame 2 are lifted together, and the structure of the rotor 1 will not be damaged.

[0035] Further, the support frame 2 is composed of a U-shaped frame 21 and a sling mounting plate 22. The cross-section of the U-shaped frame 21 is U-shaped. The U-shaped frame 21 includes a first support arm and a second support arm arranged in parallel. There is an opening between the first support arm and the second support arm. One end of the first support arm away from the bottom surface of the U-shaped frame 21 and one end of the second support arm away from the bottom surface of the U-shaped frame 21 are fixedly connected through the sling mounting plate 22.

[0036] Further, the rotor removal tooling further includes: 2 centering bushings 4 and 4 centering pins 7. The rotor 1 is composed of 2 rotor monomers. Among them, 4 centering pins 7 are placed at the bottom of 1 rotor monomer, and 1 centering bushing 4 is placed outside the 4 centering pins 7. First place the centering pins 7, and then place the centering bushings 4, which can ensure the centering of the rotor monomer center and the centering bushing.

[0037] Further, the centering bushing 4 is of an annular structure and is located below the rotor 1. After the rotor is slightly lifted by the support frame, the centering bushing 4 can be placed below the rotor 1 to play a role in protecting the rotor 1.

[0038] Further, each centering bushing 4 is formed by splicing two semi-circular bushings.

[0039] Further, the material of the centering bushing is polytetrafluoroethylene.

[0040] Further, it further includes a support plate 6, and the support plate 6 is used to remove the pump casing 10; the support plate 6 is composed of a bottom plate 61 and 4 connecting plates 62. Installation holes 63 penetrating the bottom plate 61 are provided around the bottom plate 61, and through holes 64 are provided in the middle of each connecting plate; the 4 connecting plates 62 include 2 long plates and 2 short plates. The 2 long plates are arranged parallel to each other and perpendicular to the support plate 6. The 2 long plates are connected by the 2 short plates, and the 2 short plates are parallel to each other. The through holes 64 on the two long plates are used to install long screws, and the long screws are used to lift the support plate 6. Place the support plate 6 on the top of the pump casing 10, and lifting the support plate 6 can realize the separation of the pump casing 10 and the pump housing part without damaging the structure of the pump casing 10.

[0041] The present application also provides a method for using the above-mentioned vacuum pump rotor removal tooling:

[0042] Step 1: Remove the pump housing 10: Remove the socket head cap screws on the pump housing 10, place the support plate 6 on the pump housing 10, pass the screws through the mounting holes 63 and then screw them into the pump housing to connect the support plate 6 to the top of the pump housing 10. Connect the through holes 64 in the middle of the two long plates on the support plate 6 with long screws, tighten the nuts, and lift the long screws to lift the vacuum pump housing 10. When lifting the pump housing 10, care should be taken not to damage the sealing surface. Before placing the pump housing 10, it is necessary to use a pin puller to pull out the pins, and the seals must not be damaged during the process, and the exhaust flange should be disassembled.

[0043] Step 2: Remove the rotor 1: Remove the resolver screws and pull the resolver rotor. Place the support frame 2 on the rotor 1. One bolt hole 23 on the support frame 2 is located at the center of the top of one rotor unit, and the other bolt hole 23 is located at the center of the top of the other rotor unit. Pass the bolt 3 through the bolt hole 23 and then screw it into the rotor 1. Slightly lift the rotor 1, place the centering pin 7 under the rotor 1, place the centering bushing 4 outside the centering pin 7, remove the centering pin 7, and pull out the rotor 1. During this process, the rotor 1 needs to be centered with the nail bushing 4. During the removal of the rotor 1, the space between the rotor 1 and the rotor seat is strongly magnetic, and it is easy to fall off during maintenance. During reinstallation, it is easy to cause damage to the rotor 1 (strong magnetic adsorption). The centering bushing 4 can be used to avoid damage to the rotor during removal.

[0044] Step 3: Reinstall the rotor 1. Before reinstalling the rotor 1, it is necessary to check whether all pipelines and coolant are clean. All sealing components used during the maintenance process must be lubricated with special vacuum pump lubricating oil, and new sealing components should be replaced. Place an O-ring on the vacuum pump housing, install the new rotor and the support frame 2, and screw in the positioning pin 7. Remove the positioning bushing 4, let the rotor 1 drop completely, remove the positioning pin 7, replace the new washer, reinstall the rotor with a torque wrench, remove the support frame 2, place an O-ring on the rotor screw and reinstall it, then reinstall the bolt and tighten it. The screw should rotate easily and freely without any noise.

[0045] Step 4: Assemble the pump housing: Replace the new sealing components at the sealing component position, install the support plate 6, lift the rotor pump housing, reinstall the bolts at the lower end of the rotor, fix the rotor on the screws, turn the rotor in the correct direction. If the rotor pump housing gets stuck on the screws, lift the rotor pump housing again and shake the rotor pump housing during the next lowering. The rotor and the pump housing must be aligned. Remove the support plate 6 from the rotor pump housing. Reinstall the O-ring and the exhaust flange, reinstall the socket head cap screws on the rotor pump housing, measure the clearance between the rotor pump housing and the rotor. If the clearance is outside the range value, reinstall it. Then assemble the rotor pump cover. First, install an O-ring on the top of the rotor, then install 16 M12×40 bolts and tighten them with an 87NM torque wrench. Finally, reinstall the vacuum pump motor assembly.

[0046] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will change accordingly.

[0047] In addition, the descriptions involving "first", "second", etc. in this application are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the said features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by this application.

[0048] The above-disclosed are only the preferred embodiments of this application, and of course, the scope of rights of this application cannot be limited thereby. Therefore, equivalent changes made according to the claims of this application still fall within the scope covered by this application.

Claims

1. A tool for removing a vacuum pump rotor, characterized in that, The vacuum pump includes a pump housing, and a cavity for placing a rotor is provided in the pump housing; The rotor is located inside the cavity; The rotor removal tooling includes: a support frame. Two bolt holes are provided at the bottom of the support frame. The support frame is placed on the top of the rotor, and bolts are screwed into the rotor after passing through the bolt holes, and the support frame is connected to the rotor; the top of the support frame is connected to a lifting ring, and the lifting ring is used to lift the support frame.

2. The rotor removal tooling for a vacuum pump according to claim 1, characterized in that, The support frame is composed of a U-shaped frame and a lifting ring mounting plate. The cross-section of the U-shaped frame is U-shaped. The U-shaped frame includes a first support arm and a second support arm arranged in parallel. There is an opening between the first support arm and the second support arm. One end of the first support arm away from the bottom surface of the U-shaped frame and one end of the second support arm away from the bottom surface of the U-shaped frame are fixedly connected through the lifting ring mounting plate.

3. The rotor removal tooling for a vacuum pump according to claim 1, characterized in that, The rotor removal tooling further includes: 2 centering bushings and 4 centering pins. The rotor is composed of 2 rotor monomers. Among them, 2 centering pins are placed at the bottom of 1 rotor monomer, and 1 centering bushing is placed outside the 2 centering pins.

4. The rotor removal tooling for a vacuum pump according to claim 3, characterized in that The centering bushing is of an annular structure and is located below the rotor.

5. A vacuum pump rotor removal tooling according to claim 3, characterized in that, Each centering bushing is formed by splicing two semi-circular bushings.

6. A tool for removing a vacuum pump rotor according to claim 3, characterized in that, The centering bushing is made of polytetrafluoroethylene.

7. A vacuum pump rotor removal tooling according to claim 1, characterized in that It further includes a support plate for removing the pump housing; the support plate is composed of a bottom plate and 4 connecting plates. Mounting holes penetrating the bottom plate are provided around the bottom plate, and through holes are provided in the middle of each connecting plate; the 4 connecting plates include 2 long plates and 2 short plates. The 2 long plates are arranged parallel to each other and perpendicular to the support plate. The 2 long plates are connected by the 2 short plates, and the 2 short plates are parallel to each other; The through holes on the two long plates are used to install long screws, and the long screws are used to lift the support plate.

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