CN-121976957-A - Radial split type multi-stage pump overhauling device and overhauling method

Abstract

The invention discloses a radial split type multi-stage pump overhauling device and an overhauling method, which belong to the field of overhauling and comprise a bracket, a jack, a steel ball and a dial indicator, wherein the bracket is used for supporting an external pump body, the external pump body is vertically placed, the jack is arranged in the bracket, the steel ball is arranged at the top of the jack, the dial indicator is arranged on the pump body, and the shaking amount of a bearing seat of the pump body is measured. The detection means adopted by the invention can effectively eliminate the installation accumulated error caused by the factors such as gravity action, pump body spigot fit clearance and the like in the stage-by-stage assembly process of the segmental pump body, and solves the technical pain point that the bearing cannot accurately position the radial center of the rotor.

Inventors

• SONG CHENGCAI
• YANG WEIDONG
• FAN CHANGHAI
• SHE XINGJIN
• LIU WEI
• WU CHENGBIN
• ZHANG DONG

Assignees

• 连云港石化有限公司

Dates

Publication Date

20260505

Application Date

20260205

Claims (3)

1. 1. The radial split type multi-stage pump overhauling device is characterized by comprising a bracket, a jack, a steel ball and a dial indicator; The support is used for supporting the external pump body, realizes that the external pump body is placed perpendicularly, sets up the jack in the support, and the jack top sets up the steel ball, and the dial indicator setting is on the pump body, measures pump body bearing frame and shakes the volume.
2. 2. The service method of the radial split multi-stage pump service device according to claim 1, wherein: step one: The radial split pump body F is vertically arranged on the bracket, the driving end faces downwards, and the rotor F is jacked up by a jack pad steel ball below; step two: the radial split pump body F and the impeller F are installed step by step, the clearance uniformity of the impeller ring F is checked by using a clearance gauge at 360 degrees during installation, the accumulated error caused by gravity and the clearance fit of the spigot is directly reduced, and the balance drum F, the impeller ring F, the bushing F and the peripheral clearance of the rotor F are ensured to be uniform; Thirdly, jacking the rotor F from the lowest part to the highest part by using a jack pad steel ball, measuring the total channeling amount of the rotor F, jacking the rotor F to a position which is half of the total channeling amount, putting a dial indicator 4 on a non-driving end bearing seat F, horizontally pushing the non-driving end bearing seat F, and measuring the shaking amounts of the non-driving end bearing seat F in two vertical directions; east-west non-driving end bearing seat F a shake measurement value c1; north-south direction non-driving end bearing seat F a shake measurement value c2; Step four, calculating the shaking amount of the bearing seat F: d=a min +b wherein: d- -calculating the shaking amount of the bearing seat F; b- -radial bearing F gap; a min , wherein the time of measuring the non-driving end represents the minimum clearance between the non-driving end balancing drum F and the impeller ring F, and the time of measuring the driving end represents the minimum clearance between the driving end balancing drum F and the impeller ring F; The radial bearing clearance b of the non-driving end, the clearance a min of the balancing drum F, the calculated value d=a min +b of the shaking quantity of the bearing seat F of the non-driving end, the deviation between the calculated value d and the measured values c1 and c2 of the shaking quantity of the bearing seat F of the non-driving end is less than or equal to 0.02mm, and the measured value is true and accurate; step five, adjusting a non-driving end bearing seat F in two vertical directions, positioning a rotor F to a d/2 position, easily and non-jamming a disc-driven rotor F, and tightening a connecting bolt F of the non-driving end bearing seat F and a radial split pump body F; turning over the radial split pump body F, enabling the non-driving end to face downwards, and measuring the shaking amounts of the driving end bearing seat F in two vertical directions by the same method; East-west driving end bearing seat F a shake measurement value c3; bearing seat for driving end in north-south direction F a shake amount measurement value c4; calculating the shaking amount of the driving end bearing seat F: The radial bearing clearance b of the driving end, the clearance a min of the impeller ring F and the calculated value d=a min +b of the shaking quantity of the driving end bearing seat F, and the deviation between the calculated value d and the measured values c3 and c4 of the shaking quantity of the driving end bearing seat F is less than or equal to 0.02mm, so that the measured value is true and accurate; And adjusting the driving end bearing seat F in two vertical directions, positioning the rotor F to the d/2 position, easily and without jamming the disc-driven rotor F, and tightening the connecting bolt F between the driving end bearing seat F and the radial split pump body F to finish the radial center positioning of the rotor F.
3. 3. The method for overhauling a radial split type multistage pump according to claim 2, wherein the dial indicator measures the shaking amount of the bearing seat F, and the rotor F is positioned at the center of the radial gap by using the radial bearings F at two ends.

Description

Radial split type multi-stage pump overhauling device and overhauling method Technical Field The invention belongs to the technical field of chemical cleaning equipment, and particularly relates to a radial split type multi-stage pump overhauling device and an overhauling method. Background The radial split type multistage pump is used as an important fluid machine, is widely applied to a plurality of industrial fields at present, including the electric power industry, the petroleum and natural gas industry, the general industry and the like, and has the characteristics of small volume, relatively small volume due to the design characteristics of the radial split type multistage pump, and convenient installation and transportation. The radial split type multistage pump has the advantages of good sealing performance, fewer sealing surfaces, relatively good sealing performance and reduced leakage risk. The maintenance is convenient, and the radial split design ensures that the maintenance of certain parts is more convenient and the whole pump body does not need to be disassembled although the maintenance of the multistage pump is relatively complex. The device has the characteristics of wide application range, high efficiency, stability and durability, and has higher flow and lift range. Radial split type multistage pumps are adopted for high-pressure and high-flow fluid transportation at abroad and at home, but horizontal assembly technology is still used, jigger jamming phenomenon often occurs in the assembly process, problems of bearing bush abrasion, shaft breakage, large vibration and the like often occur after the mechanical pump is assembled, and the assembly quality is very unstable. I often encounter such problems during routine maintenance, such as high wear accidents of the 1 day bush temperature of the PE device mother liquor pump after assembly. The ethylene device ethylene delivery pump is assembled for 6 times by the same pump, and fault problems such as jigger jamming, large vibration, abrasion of a guide bearing, abrasion of an interstage seal and the like occur in each test run after assembly. The operation vibration of the ethylene device after the hot well pump is assembled is large. The thermoelectric device is assembled for 2 times by the same temperature reduction water pump, and the problems of jigger jamming, large running vibration, abrasion of a mouth ring and the like occur after the assembly. The horizontal assembly radial split multistage pump generates accumulated errors when the segmental pump body is installed step by step due to the reasons of gravity, pump body spigot fit clearance and the like, the clearance of the impeller mouth ring is uneven and is eccentrically worn, and the pump body which is clamped by a jigger is dismounted and reinstalled while the jigger is jigged. After the assembly is completed, the phenomenon that the positioning pin of the bearing seat is inserted into the jigger is frequently caused, the bearing seat fixing bolt is tightened when the jigger is assembled to be free of jamming by adjusting the bearing seat, and the positioning pin hole is reprocessed. The assembly method can only ensure the diameter gaps of the balance drum, the mouth ring and the bushing, can not ensure the uniform gaps around, and the equipment vibrates greatly when the equipment is started or stopped or the working condition changes, so that the small gaps of the balance drum, the mouth ring and the bushing are bumped and ground due to vibration, and the pump breaks the main shaft, the bearing bush, the internal parts are worn and the like due to friction. I have developed a radial split type multi-stage pump service device and service method to replace the prior art. Disclosure of Invention The invention aims to provide a radial split type multi-stage pump overhauling device and an overhauling method, aiming at the problems in the background technology, the invention adopts a detection means, the method can effectively eliminate the installation accumulated error caused by factors such as gravity action, pump body spigot fit clearance and the like in the step-by-step assembly process of the segmental pump body, and solves the technical pain point that the bearing cannot accurately position the radial center of the rotor. In order to achieve the above purpose, the present invention provides the following technical solutions: the radial split type multi-stage pump overhauling device is characterized by comprising a bracket, a jack, a steel ball and a dial indicator; The support is used for supporting the external pump body, realizes that the external pump body is placed perpendicularly, sets up the jack in the support, and the jack top sets up the steel ball, and the dial indicator setting is on the pump body, measures pump body bearing frame and shakes the volume. A radial split type multi-stage pump overhauling method is characterized in that: step one: The radial split pump