Device for dismounting and mounting centrifugal pump shaft

Abstract

The invention provides a device for dismounting and mounting a centrifugal pump shaft, the device comprises a height adjusting part, a reverse pressure applying assembly, an elastic supporting assembly, a pump shaft supporting assembly and a base, the reverse pressure applying assembly, the elastic supporting assembly, the pump shaft supporting assembly and the base are mounted on the height adjusting part, and the pump shaft supporting assembly is used for supporting the pump shaft according to the length of the pump shaft. The height of the pump shaft supporting assembly is adjusted, so that the position of the pump shaft is adjusted, the elastic supporting assembly drives the jack to move, the end of the jack makes contact with the reverse pressure applying assembly, the reverse pressure applying assembly applies acting force towards the direction of the pump shaft to the jack, the bottom of the jack acts on the top end of the shaft rod, and the pump shaft supporting assembly supports the pump shaft. And if a new upper bearing or a new lower bearing is installed again, the upper bearing or the lower bearing is installed after being placed on the pump shaft supporting assembly.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal pump shaft disassembly, and in particular to a device for disassembling and installing a centrifugal pump shaft. Background Art

[0002] During the development of oil fields, the gathering and transportation joint station is a very important hub processing station, which mainly separates the three phases of oil, gas and water from the produced crude oil. Among them, the export of crude oil and sewage is carried out through single-stage or multi-stage centrifugal pumps. The basic structure of a multi-stage centrifugal pump is composed of six parts, namely the impeller, pump body, pump shaft, bearing, sealing ring and stuffing box. The function of the pump shaft is to connect with the motor through the coupling and transmit the torque of the motor to the impeller, so the pump shaft is the main component for transmitting mechanical energy. The bearing is a component that supports the pump shaft and is mounted on the pump shaft. There are two types of rolling bearings and sliding bearings. Rolling bearings use butter as a lubricant. The lubricant should be added to 2 / 3 to 3 / 4 of the volume. Too much will cause heat, and too little will cause noise and heat. The lubricant used for sliding bearings is transparent oil, which should be added to the oil level line. Too much oil will seep out along the pump shaft and float, while too little oil will overheat and burn the bearings, causing accidents. During the operation of the water pump, the bearing temperature is as high as 85 degrees and generally runs around 60 degrees. If the temperature is too high, the cause should be found to determine whether there are impurities, whether the oil is black, whether water has entered, and timely treatment should be carried out. At present, due to improper operation methods when disassembling and assembling the pump shaft and bearings used in production and operation, the service life of the centrifugal pump is greatly shortened.

[0003] Many problems were encountered during the on-site disassembly of bearings. The commonly used method for disassembling bearings is to use a three-jaw tensioner. When disassembling bearings, the pump shaft is fixed on a bench vise and a rubber cover is needed to prevent the bench vise from damaging the pump shaft. Then, the three-jaw tensioner's jackscrew is used to push the tail end of the pump shaft, and the three-jaw tensioner is buckled on the inner rail of the bearing. Then, an adjustable wrench is used for disassembly. Sometimes, due to the locking of the bearing, it is difficult to disassemble even with additional force, and injuries to hands or arms often occur due to improper operation.

[0004] There is also a technical difficulty when installing bearings. When the rolling bearing is assembled on the pump shaft, its inner ring and the shaft neck are matched with a small amount of interference: usually the interference value is 0.01-0.05mm. The smaller the diameter of the shaft neck, the smaller the interference amount; the larger the diameter of the shaft, the larger the interference amount. When the rolling bearing is assembled on the pump shaft, force should be applied to the inner ring so that the inner ring is pushed along the shaft neck until it reaches the shaft shrinkage or sleeve. Usually there are two ways to assemble the rolling bearing and the shaft neck: one is the hot-installation method, which is to put the rolling bearing into the engine oil and heat the engine oil so that the inner ring of the rolling bearing expands when it encounters heat, so that the rolling bearing can be smoothly sleeved on the shaft neck, and then it is naturally cooled to room temperature. When the engine oil is heated, the temperature is generally 80-100℃, not exceeding 120℃. When the temperature is too high, the rolling bearing is easy to anneal. When the temperature is too low, the expansion of the inner ring of the bearing is too small, which is not convenient for installation. In order to prevent the temperature of the engine oil from being too high, put the engine oil box in the sink and heat the water with a flame. When the rolling bearing is placed in the engine oil, the bearing should be supported by a screen so that it is heated more evenly and local overheating of the rolling bearing is avoided. The second is the cold installation method, which is to use a hand hammer and a copper rod to install the rolling bearing. When the interference between the inner ring of the rolling bearing and the shaft neck is small, the copper rod is used as a liner, so that one end of the copper rod is placed on the inner ring of the rolling bearing, and the other end of the copper rod is hit with a hand hammer. The inner ring of the bearing is symmetrically and evenly stressed, which makes the bearing smoothly advance along the shaft neck. Use a special sleeve to install the rolling bearing. First, vertically place the pump shaft or soft metal liner, put the rolling bearing on the shaft, and place it straight. Use a hammer to hit the sleeve until it reaches the shoulder of the shaft. Although the above methods of installing bearings can be installed, they are time-consuming and labor-intensive, and safety accidents often occur. The above methods of installation often cause bearing damage and pump shaft damage, which invisibly increases production costs. Summary of the invention

[0005] The invention provides a device for disassembling and installing a centrifugal pump shaft, which can conveniently and quickly install and disassemble the centrifugal pump shaft and avoid damage to bearings and the pump shaft.

[0006] In view of this, the present invention proposes a device for disassembling and installing a centrifugal pump shaft, comprising: a height adjustment assembly; a reverse pressure assembly for installing a jack and connected to one end of the height adjustment assembly; a base connected to the other end of the height adjustment assembly; an elastic support assembly connected to the reverse pressure assembly and arranged in the area between the reverse pressure assembly and the base; a pump shaft support assembly for installing a centrifugal pump shaft, detachably connected to the height adjustment assembly and arranged in the area between the reverse pressure assembly and the base.

[0007] In some optional embodiments, the height adjustment assembly includes a first height adjustment component and a second height adjustment component, and the first height adjustment component and the second height adjustment component are arranged face to face; the two ends of the reverse pressure assembly are respectively connected to the first height adjustment component and the second height adjustment component; the two ends of the pump shaft support assembly are respectively connected to the first height adjustment component and the second height adjustment component.

[0008] In some optional embodiments, the height adjustment assembly includes a fixing assembly, and the first height adjustment component and the second height adjustment component are both connected to the pump shaft support assembly via the fixing assembly.

[0009] In some optional embodiments, the fixing assembly includes a first fixing component, a second fixing component and a third fixing component; the first height adjustment component and the second height adjustment component are each provided with a plurality of the first fixing components in their own height directions; the second fixing component is provided at a position where the pump shaft support assembly is respectively connected to the first height adjustment component and the second height adjustment component; the third fixing component connects the first fixing component and the second fixing component.

[0010] In some optional embodiments, the first fixing component is a first through hole provided in the first height adjustment component and the second height adjustment component; the second fixing component is a second through hole provided in the pump shaft support assembly; and the third fixing component is a pin shaft, which passes through the first through hole and the second through hole.

[0011] In some optional embodiments, the elastic support assembly includes a first support component, a jack support plate, an elastic assembly and a pressure handle, the elastic assembly is respectively connected to the first support component and the reverse pressure assembly, the jack support plate is arranged on the first support component, and the jack and the pressure handle are arranged on the jack support plate.

[0012] In some optional embodiments, the reverse pressure assembly includes a first reverse pressure component and a second reverse pressure component, and the first reverse pressure component and the second reverse pressure component are arranged back to back and respectively connected to two sides of the height adjustment assembly.

[0013] In some optional embodiments, the pump shaft support assembly includes a second support component, a third support component, a disassembly support plate and an installation support plate, the second support component and the third support component are arranged back to back and respectively connected to two sides of the height adjustment assembly; the disassembly support plate can be arranged on the second support component and the third support component; the installation support plate can be arranged on the second support component and the third support component.

[0014] In some optional embodiments, the installation support plate includes a first splicing plate and a second splicing plate, one side of the first splicing plate is butt-jointed with one side of the second splicing plate, a first arc groove is provided on the side where the first splicing plate and the second splicing plate are butt-jointed, a second arc groove is provided on the side where the second splicing plate and the first splicing plate are butt-jointed, and the first arc groove and the second arc groove form a mounting hole; the disassembly support plate is provided with a clamping groove.

[0015] On the other hand, the present invention further provides a method for disassembling and installing a centrifugal pump shaft, which is achieved by using any of the above-mentioned devices for disassembling and installing a centrifugal pump shaft.

[0016] Compared with the prior art, the present invention has the following technical effects:

[0017] The present invention provides a device for disassembling and installing a centrifugal pump shaft, which comprises a height adjusting component, a reverse pressure component, an elastic support component, a pump shaft support component and a base. The reverse pressure component, the elastic support component, the pump shaft support component and the base are installed on the height adjusting component. The pump shaft support component adjusts the height of the pump shaft support component according to the length of the pump shaft, thereby adjusting the position of the pump shaft. The elastic support component drives the jack to move, and the end of the jack contacts the reverse pressure component, and the reverse pressure component applies a force to the jack in the direction of the pump shaft. The bottom of the jack acts on the top of the shaft rod, and the pump shaft support component supports the pump shaft, thereby achieving the purpose of disassembling the upper bearing and the lower bearing. If a new upper bearing or lower bearing is reinstalled, the upper bearing or the lower bearing is placed after the pump shaft support component for installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 A schematic diagram of the structure of a device for disassembling and installing a centrifugal pump shaft provided in one embodiment of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the installation of the pump shaft support assembly of the provided embodiment;

[0021] Figure 3 for Figure 1 A schematic diagram of installing a support plate of the provided embodiment;

[0022] Figure 4 for Figure 1 A schematic structural diagram of a disassembly support plate of the provided embodiment.

[0023] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names in the figure is:

[0024] 1-height adjustment assembly; 11-first height adjustment component; 12-second height adjustment component; 13-fixing assembly; 131-first fixing component; 132-second fixing component; 133-third fixing component; 2-reverse pressure assembly; 21-first reverse pressure component; 22-second reverse pressure component; 3-jack; 31-jack body; 32-jacking shaft; 4-base; 41-support seat; 42-reinforcement frame; 43-fastening rod; 44-fixing hole ;5-elastic support assembly;51-first support component;52-jack support plate;53-first elastic component;54-second elastic component;55-pressure handle;56-guide sleeve;57-spring;6-pump shaft support assembly;61-second support component;62-third support component;63-disassembly support plate;64-installation support plate;641-first splicing plate;642-second splicing plate;7-pump shaft;71-shaft rod;72-upper bearing;73-lower bearing. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0027] There are many difficulties in the process of disassembling bearings on site. The commonly used method of disassembling bearings is to use a three-jaw tensioner. When disassembling bearings, the pump shaft is fixed on a bench vise and a rubber is placed on it to prevent the bench vise from damaging the pump shaft. Then the three-jaw tensioner's jackscrew is used to push the tail end of the pump shaft, and the three-jaw tensioner is buckled on the inner rail of the bearing. Then, a movable wrench is used for disassembly. Sometimes, due to the locking of the bearing, it is difficult to disassemble even with additional force, and injuries to hands or arms often occur due to improper operation.

[0028] There is also a technical difficulty when installing bearings. When the rolling bearing is assembled on the pump shaft, its inner ring and the shaft neck are matched with a small amount of interference: usually the interference value is 0.01-0.05mm. The smaller the diameter of the shaft neck, the smaller the interference amount; the larger the diameter of the shaft, the larger the interference amount. When the rolling bearing is assembled on the pump shaft, force should be applied to the inner ring so that the inner ring is pushed along the shaft neck until it reaches the shaft shrinkage or sleeve. Usually there are two ways to assemble the rolling bearing and the shaft neck: one is the hot-installation method, which is to put the rolling bearing into the engine oil and heat the engine oil so that the inner ring of the rolling bearing expands when it encounters heat, so that the rolling bearing can be smoothly sleeved on the shaft neck, and then it is naturally cooled to room temperature. When the engine oil is heated, the temperature is generally 80-100℃, not exceeding 120℃. When the temperature is too high, the rolling bearing is easy to anneal. When the temperature is too low, the expansion of the inner ring of the bearing is too small, which is not convenient for installation. In order to prevent the temperature of the engine oil from being too high, put the engine oil box in the sink and heat the water with a flame. When the rolling bearing is placed in the engine oil, the bearing should be supported by a screen so that it is heated more evenly and local overheating of the rolling bearing is avoided. The second is the cold installation method, which is to use a hand hammer and a copper rod to install the rolling bearing. When the interference between the inner ring of the rolling bearing and the shaft neck is small, the copper rod is used as a liner, so that one end of the copper rod is placed on the inner ring of the rolling bearing, and the other end of the copper rod is hit with a hand hammer. The inner ring of the bearing is symmetrically and evenly stressed, which makes the bearing smoothly advance along the shaft neck. Use a special sleeve to install the rolling bearing. First, vertically place the pump shaft or soft metal liner, put the rolling bearing on the shaft, and place it straight. Use a hammer to hit the sleeve until it reaches the shoulder of the shaft. Although the above methods of installing bearings can be installed, they are time-consuming and labor-intensive, and safety accidents often occur. The above methods of installation often cause bearing damage and pump shaft damage, which invisibly increases production costs.

[0029] The present invention provides a device for disassembling and installing a centrifugal pump shaft, comprising: a height adjustment component 1; a reverse pressure component 2, used for installing a jack 3, connected to one end of the height adjustment component 1; a base 4, connected to the other end of the height adjustment component 1; an elastic support component 5, connected to the reverse pressure component 2, and arranged in the area between the reverse pressure component 2 and the base 4; a pump shaft support component 6, used for installing a centrifugal pump shaft 7, detachably connected to the height adjustment component 1, and arranged in the area between the reverse pressure component 2 and the base 4.

[0030] Specifically, the jack 3 includes a jack body 31 and a top shaft 32. One end of the top shaft 32 is connected to the jack body 31, and the other end passes through the elastic support assembly 5. The pump shaft 7 passes through the pump shaft support assembly 6. The pump shaft 7 includes a shaft 71, an upper bearing 72 and a lower bearing 73. The upper bearing 72 and the lower bearing 73 are sequentially arranged on the shaft 71. The upper bearing 72 and the lower bearing 73 are respectively located on the upper and lower sides of the pump shaft support assembly 6. The reverse pressure assembly 2, the elastic support assembly 5, the pump shaft support assembly 6 and the base 4 are sequentially arranged in the height direction of the height adjustment assembly 1. The elastic support assembly 5 is connected to the reverse pressure assembly 2. The elastic support assembly 5 is pressed hard, and the elastic support assembly 5 is stretched. After the force is canceled, the top of the elastic support assembly 5 contacts the reverse pressure assembly 2. The reverse pressure assembly 2 gives the elastic support assembly 5 a reverse force, and the elastic support assembly 5 drives the jack 3 to move toward the base 4. The pump shaft support assembly 6 is arranged on the height adjustment assembly 1. The pump shaft support assembly 6 can adjust its own height on the height adjustment assembly 1, so that the height of the pump shaft support assembly 6 can be adjusted according to the length of the pump shaft 7, thereby adjusting the position of the pump shaft 7. The elastic support assembly 5 drives the jack 3 to move, and the end of the jack 3 contacts the reverse pressure assembly 2. The reverse pressure assembly 2 applies a force to the jack 3 in the direction of the pump shaft 7. The bottom of the jack 3 acts on the top of the shaft 71. The pump shaft support assembly 6 supports the pump shaft 7, thereby achieving the purpose of disassembling the upper bearing 72 and the lower bearing 73. If a new upper bearing 72 or lower bearing 73 is reinstalled, the upper bearing 72 or lower bearing 73 is placed after the pump shaft support assembly 6 for installation.

[0031] In some optional embodiments, the height adjustment assembly 1 includes a first height adjustment component 11 and a second height adjustment component 12, and the first height adjustment component 11 and the second height adjustment component 12 are arranged face to face; the two ends of the reverse pressure assembly 2 are respectively connected to the first height adjustment component 11 and the second height adjustment component 12; the two ends of the pump shaft support assembly 6 are respectively connected to the first height adjustment component 11 and the second height adjustment component 12.

[0032] Specifically, the first height adjustment component 11 and the second height adjustment component 12 are arranged in parallel, and the reverse pressure component 2, the elastic support component 5, the pump shaft support component 6 and the base 4 are sequentially arranged in the height direction of the height adjustment component 1. The two ends of the reverse pressure component 2 in the length direction are respectively connected to the first height adjustment component 11 and the second height adjustment component 12. The two ends of the pump shaft support component 6 in the length direction are respectively connected to the first height adjustment component 11 and the second height adjustment component 12.

[0033] In some optional embodiments, the height adjustment assembly 1 includes a fixing assembly 13, and the first height adjustment component 11 and the second height adjustment component 12 are both connected to the pump shaft support assembly 6 through the fixing assembly 13. The fixing assembly 13 can install the pump shaft support assembly 6 on the height adjustment assembly 1, and can adjust the position of the pump shaft support assembly 6 in the height adjustment assembly 1, and can adjust the height of the pump shaft support assembly 6 according to the length of the pump shaft 7, thereby adjusting the position of the pump shaft 7, the elastic support assembly 5 drives the jack 3 to move, and the end of the jack 3 contacts the reverse pressure assembly 2, and the reverse pressure assembly 2 applies a force toward the pump shaft 7 to the jack 3, and the bottom of the jack 3 acts on the top of the shaft 71, and the pump shaft support assembly 6 supports the pump shaft 7, thereby achieving the purpose of disassembling the upper bearing 72 and the lower bearing 73. If a new upper bearing 72 or lower bearing 73 is reinstalled, the upper bearing 72 or lower bearing 73 is placed after the pump shaft support assembly 6 for installation.

[0034] Specifically, the fixing component 13 includes a first fixing component 131, a second fixing component 132 and a third fixing component 133; the first height adjustment component 11 and the second height adjustment component 12 are each provided with a plurality of first fixing components 131 in their own height direction; the second fixing component 132 is provided at the position where the pump shaft support component 6 is respectively connected to the first height adjustment component 11 and the second height adjustment component 12; the third fixing component 133 connects the first fixing component 131 and the second fixing component 132.

[0035] Optionally, the first fixing component 131 is a first through hole provided in the first height adjustment component 11 and the second height adjustment component 12; the second fixing component 132 is a second through hole provided in the pump shaft support assembly 6; the third fixing component 133 is a pin shaft, and the pin shaft passes through the first through hole and the second through hole.

[0036] Furthermore, the first height adjustment component 11 is evenly provided with a plurality of first through holes in its own height direction, and the second height adjustment component 12 is evenly provided with a plurality of second through holes in its own height direction, and a pin shaft is respectively provided corresponding to a first through hole and a second through hole. When in use, the pin shaft is passed through the first through hole and the second through hole, so as to realize the installation of the pump shaft support assembly 6 on the first height adjustment component 11 and the second height adjustment component 12.

[0037] In some optional embodiments, the elastic support assembly 5 includes a first support component 51, a jack support plate 52, an elastic component and a pressure handle 55, the elastic component is respectively connected to the first support component 51 and the reverse pressure assembly 2, the jack support plate 52 is arranged on the first support component 51, and the jack 3 and the pressure handle 55 are arranged on the jack support plate 52.

[0038] Specifically, the elastic component includes a first elastic component 53 and a second elastic component 54, and the two ends of the first elastic component 53 and the second elastic component 54 are respectively connected to the first support component 51 and the reverse pressure component 2, and the first support component 51. The jack 3 includes a jack body 31 and a top shaft rod 32, one end of the top shaft rod 32 is connected to the jack body 31, and the other end passes through the elastic support component 5. The jack 3 is arranged between the first elastic component 53 and the second elastic component 54. The first elastic component 53 and the second elastic component 54 can provide uniform elastic force on both sides of the jack 3.

[0039] In some optional embodiments, the reverse pressure assembly 2 includes a first reverse pressure component 21 and a second reverse pressure component 22, which are arranged back to back and respectively connected to two sides of the height adjustment assembly 1. The first elastic component 53 includes a spring 57 and a guide sleeve 56, both ends of the spring 57 are respectively connected to the guide sleeve 56, the spring 57 is connected to the reverse pressure assembly 2 through the guide sleeve 56, and the spring 57 is connected to the first support component 51 through the guide sleeve 56.

[0040] Specifically, the two ends of the first reverse pressure component 21 in the length direction are respectively connected to the first height adjustment component 11 and the second height adjustment component 12, and the two ends of the second reverse pressure component 22 in the length direction are respectively connected to the first height adjustment component 11 and the second height adjustment component 12. The elastic support component 5 is connected to the reverse pressure component 2, and the elastic support component 5 is pressed hard to stretch the elastic support component 5. After the force is removed, the top of the elastic support component 5 contacts the reverse pressure component 2, and the reverse pressure component 2 applies a reverse force to the elastic support component 5, and the elastic support component 5 drives the jack 3 to move toward the base 4. The pump shaft support assembly 6 is arranged on the height adjustment assembly 1. The pump shaft support assembly 6 can adjust its own height on the height adjustment assembly 1, so that the height of the pump shaft support assembly 6 can be adjusted according to the length of the pump shaft 7, thereby adjusting the position of the pump shaft 7. The elastic support assembly 5 drives the jack 3 to move, and the end of the jack 3 contacts the reverse pressure assembly 2. The reverse pressure assembly 2 applies a force to the jack 3 in the direction of the pump shaft 7. The bottom of the jack 3 acts on the top of the shaft 71. The pump shaft support assembly 6 supports the pump shaft 7, thereby achieving the purpose of disassembling the upper bearing 72 and the lower bearing 73. If a new upper bearing 72 or lower bearing 73 is reinstalled, the upper bearing 72 or lower bearing 73 is placed after the pump shaft support assembly 6 for installation.

[0041] In some optional embodiments, the pump shaft support assembly 6 includes a second support component 61, a third support component 62, a disassembly support plate 63 and an installation support plate 64, the second support component 61 and the third support component 62 are arranged back to back and respectively connected to the two sides of the height adjustment assembly 1; the disassembly support plate 63 can be arranged on the second support component 61 and the third support component 62; the installation support plate 64 can be arranged on the second support component 61 and the third support component 62.

[0042] Specifically, when disassembling the upper bearing 72 and the lower bearing 73, the disassembly support plate 63 is used. When disassembling the upper bearing 72, by applying force to the pressure handle 55, the jack 3 is pressed, and the top of the jack 3 contacts the reverse pressure component 2. Through the reaction force of the reverse pressure component 2, the top shaft rod 32 of the jack 3 pushes down the tail end of the pump shaft 71, and the reaction force of the upper bearing 72 is on the mounting support plate 64, so that the upper bearing 72 is disassembled. When disassembling the lower bearing 73, the position of the second support component 61 and the third support component 62 is readjusted, and the disassembly support plate 63 is placed on the second support component 61 and the third support component 62. By applying force to the pressure handle 55, the jack 3 is pressed, and the top of the jack 3 contacts the reverse pressure component 2. Through the reaction force of the reverse pressure component 2, the top shaft rod 32 of the jack 3 presses down the tail end of the pump shaft 71, and the reaction force of the lower bearing 73 is above the mounting support plate 64, thereby realizing the disassembly of the lower bearing 73.

[0043] Furthermore, when installing a new upper bearing 71, the positions of the second support component 61 and the third support component 62 are readjusted, and the mounting support plate 64 is set above the second support component 61 and the third support component 62. The new upper bearing 71 is first placed on the mounting support plate 64, and the pump shaft 7 is vertically aligned with the mounting hole of the mounting support plate 64. By applying force to the pressure handle 55, the jack 3 is pressed, and the top of the jack 3 contacts the reverse pressure component 2. Through the reaction force of the reverse pressure component 2, the top shaft rod 32 of the jack 3 pushes down the tail end of the pump shaft 71, and the reaction force of the upper bearing 72 is on the mounting support plate 64, thereby realizing the installation of the upper bearing 72. When reinstalling the lower bearing 73, readjust the positions of the second support component 61 and the third support component 62, set the installation support plate 64 above the second support component 61 and the third support component 62, place the new lower bearing 73 on the installation support plate 64, align the pump shaft 7 vertically with the installation support plate 64, apply force to the pressure handle 55, press the jack 3, the top of the jack 3 contacts the reverse pressure component 2, through the reaction force of the reverse pressure component 2, the top shaft rod 32 of the jack 3 presses down the tail end of the pump shaft 71, and the reaction force of the lower bearing 73 is on the installation support plate 64, so that the installation of the lower bearing 73 is achieved.

[0044] In some optional embodiments, the installation support plate 64 includes a first splicing plate 641 and a second splicing plate 642, one side of the first splicing plate 641 is connected to one side of the second splicing plate 642, a first arc groove is set on the side where the first splicing plate 641 and the second splicing plate 642 are connected, a second arc groove is set on the side where the second splicing plate 642 and the first splicing plate 641 are connected, and the first arc groove and the second arc groove form a mounting hole; a disassembly support plate 63 is provided with a clamping groove.

[0045] In some optional embodiments, the base 4 includes two, one of which is connected to the first height adjustment component 11, and the other base 4 is connected to the second height adjustment component 12, and the two bases 4 are connected by a fastening rod 43 to improve the stability of the base 4. Any base 4 includes a support seat 41, a reinforcement frame 42 and a fixing hole 44, the first height adjustment component 11 is connected to the support seat 41, the support seat 41 is connected to the first height adjustment component 11 through the reinforcement frame 42, and the support seat 41 is connected to the second height adjustment component 12 through the reinforcement frame 42, and the reinforcement frame 42 is triangular.

[0046] On the other hand, the present invention further provides a method for disassembling and installing a centrifugal pump shaft, which is achieved by any of the above devices for disassembling and installing a centrifugal pump shaft.

[0047] Specifically, the method for disassembling and installing the centrifugal pump shaft includes the following steps: installing or disassembling the pump shaft 7; checking the installation of the pump shaft 7 and whether the pump shaft 7 is assembled in place; and collecting tools and cleaning the site.

[0048] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for disassembling and installing a centrifugal pump shaft, characterized in that: include: Height adjustment assembly (1); A reverse pressure component (2), used for installing a jack (3), connected to one end of the height adjustment component (1); A base (4) connected to the other end of the height adjustment component (1); An elastic support component (5) connected to the reverse pressure component (2) and arranged in a region between the reverse pressure component (2) and the base (4); A pump shaft support assembly (6) is used to mount a centrifugal pump shaft (7), is detachably connected to the height adjustment assembly (1), and is disposed in the area between the reverse pressure assembly (2) and the base (4).

2. The device for disassembling and installing a centrifugal pump shaft according to claim 1, characterized in that: The height adjustment assembly (1) comprises a first height adjustment component (11) and a second height adjustment component (12), wherein the first height adjustment component (11) and the second height adjustment component (12) are arranged face to face; Two ends of the reverse pressure component (2) are respectively connected to the first height adjustment component (11) and the second height adjustment component (12); Both ends of the pump shaft support assembly (6) are respectively connected to the first height adjustment component (11) and the second height adjustment component (12).

3. The device for disassembling and installing a centrifugal pump shaft according to claim 2, characterized in that: The height adjustment assembly (1) comprises a fixing assembly (13), and the first height adjustment component (11) and the second height adjustment component (12) are both connected to the pump shaft support assembly (6) via the fixing assembly (13).

4. The device for disassembling and installing a centrifugal pump shaft according to claim 3, characterized in that: The fixing assembly (13) comprises a first fixing component (131), a second fixing component (132) and a third fixing component (133); The first height adjustment component (11) and the second height adjustment component (12) are both provided with a plurality of the first fixing components (131) in their own height directions; The second fixing component (132) is arranged at the position where the pump shaft support assembly (6) is connected to the first height adjustment component (11) and the second height adjustment component (12) respectively; The third fixing component (133) connects the first fixing component (131) and the second fixing component (132).

5. The device for disassembling and installing a centrifugal pump shaft according to claim 4, characterized in that: The first fixing component (131) is a first through hole provided on the first height adjustment component (11) and the second height adjustment component (12); the second fixing component (132) is a second through hole provided on the pump shaft support assembly (6); and the third fixing component (133) is a pin shaft, which passes through the first through hole and the second through hole.

6. The device for disassembling and installing a centrifugal pump shaft according to claim 1, characterized in that: The elastic support assembly (5) comprises a first support component (51), a jack support plate (52), an elastic assembly and a pressure handle (55); the elastic assembly (55) is respectively connected to the first support component (51) and the reverse pressure assembly (2); the jack support plate (52) is arranged on the first support component (51); and the jack (3) and the pressure handle (55) are arranged on the jack support plate (52).

7. The device for disassembling and installing a centrifugal pump shaft according to claim 1, characterized in that: The reverse pressure component (2) comprises a first reverse pressure component (21) and a second reverse pressure component (22); the first reverse pressure component (21) and the second reverse pressure component (22) are arranged back to back and are respectively connected to two sides of the height adjustment component (1).

8. The device for disassembling and installing a centrifugal pump shaft according to claim 5, characterized in that: The pump shaft support assembly (6) comprises a second support component (61), a third support component (62), a disassembly support plate (63) and an installation support plate (64); the second support component (61) and the third support component (62) are arranged back to back and are respectively connected to two sides of the height adjustment assembly (1); The disassembly support plate (63) can be arranged on the second support component (61) and the third support component (62); The mounting support plate (64) can be arranged on the second support member (61) and the third support member (62).

9. The device for disassembling and installing a centrifugal pump shaft according to claim 8, characterized in that: The mounting support plate (64) comprises a first splicing plate (641) and a second splicing plate (642), one side of the first splicing plate (641) and one side of the second splicing plate (642) are butted against each other, a first arc-shaped groove is arranged on the butted side of the first splicing plate (641) and the second splicing plate (642), a second arc-shaped groove is arranged on the butted side of the second splicing plate (642) and the first splicing plate (641), and the first arc-shaped groove and the second arc-shaped groove form a mounting hole; The disassembly support plate (63) is provided with a clamping groove.

10. A method for disassembling and installing a centrifugal pump shaft, which is achieved by using the device for disassembling and installing a centrifugal pump shaft according to any one of claims 1 to 9.

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