Polyacrylamide devices screw bearing and chain modification research

Polyacrylamide device 2018 - screw bearing and chain modification research 12 - Every 20 Wang Fengwei abstract: polyacrylamide device production line of the pre grinding machine 2 sets, cushion material box, each device is included in the eight screw and the corresponding chain with up tight organization. In the process of practical production because of the existing screw bearing seal is lax, often appear medium into the bearing, in turn, result in bearing damage; Chain due to frequent in the process of screw and reversing impact when tight organization cause damage frequently. Now the screw bearing and chain up tight organization reform experiment, with the premise of meeting the production requirement, increase the operation cycle. Key words: the pre grinding; Buffer hopper; Up tight round one, the overview of polyacrylamide three main device for oilfield eor poly propylene amide chemical additives. Opened in December 2002, the design capacity of 1. 30000 tons/year. Workshop for two production lines, with a total of 93 sets of equipment, static equipment 68 units, equipment localization rate of more than 95%. Since construction, has experienced four major overhaul, larger than 10 technology. The equipment localization rate is high, and in the process of production equipment load is bigger, due to the long period operation is very difficult to guarantee. Therefore proposed equipment modification direction is: under the condition of existing equipment, from the increasing use of operation cycle of equipment, shorten maintenance time, reduce the equipment failure caused by the impact on production. Second, the reform scheme and analysis of 1. For bearing seat into the medium led to failure and grease and bearing failure problem, a total of three retrofit scheme is put forward, test results are as follows: experiment 1: bearing directly to the back plate made & Phi; 80 aperture, at the same time, the use of double row angular contact bearings, and the taper sleeve mounted to the screw ( As shown in figure 1) 。 After a week after installation, found that the bearing seat body temperature. Two weeks after dismantled found side panel the block badly worn. Bearing internal no wear and tear, grease to normal. Figure 1 test analysis: the experiments in the purpose to prevent water vapor into the bearing and pipe. Field test shows that the test can prevent water vapor into the bearing, extend the service life of bearing. But due to the large screw's axial thrust, the taper sleeve can't lock screw, caused by the screw displacement before and after the back plate and screw spacer sleeve bearing wear and tear, reduce the service life of the bearing as a whole. Experiment 2: cancel the bearing directly instead of hard nylon sleeve, nylon sets of inner ring and screw interference installation, outer ring directly supported by bearing wall cavity, including cavity with nylon sets of contact surface filling lubricating oil ( As shown in figure 2) 。 After the installation commissioning when the current normal, normal operation; A week after the operation has not found the nylon liner and the screw rotate, but the current normal; Running a month removed nylon inner ring close to the screw set below the serious wear and tear, and screw have some wear and tear. Figure 2 test analysis: the purpose of this test is to use the wear resistance of nylon sleeve, between nylon set of outer ring and bearing wall add lubricant, nylon sets rotate around the box inner chamber. Field test shows that in the long run, drive end with nylon sleeve screw shaft easy to loosen when interference fit for a long time, nylon sets and dry grinding screw shaft, eventually leading to nylon sleeve wear serious, axis at the same time also to have certain wear and tear. Experiment 2: the inner change for steel, nylon used on steel with screw top silk, and the inside of the bearing support client and main side instead to hard nylon sleeve. Used in the lateral bearing lubricating oil, and add oil on steel trajectory way ( As shown in figure 3) 。 Through field test, found that appeared in the process of screw reversed falls off in steel, forward ShiGang directly with the nylon sleeve, nylon sets of damage. Figure 3 test analysis: this test is mainly consider nylon sleeve and wear-resisting characteristics between nylon sleeve, but after a study found that, without considering the screw and reversing, the axial displacement of the problem. Second, in view of the chain in the process of screw and reversing shock of frequent up tight organization loose chain, in turn, damage problem, a total of two retrofit scheme is put forward, the test results are as follows: experiment 1: slide up tight round push end to link directly, with & Phi; 4 spring, with the top wire direct role in promoting the plate clamp top silk, found in the process of the experiment is to turn the time can play a role when tight, Figure 4) 。 A week later, the chain extension, when tight round by spring force to chain up tight. But in the reverse process, because there is no thrust action, when tight round of compression, the chain is loose. Experiment three weeks later, chain operating normally. Figure 4 test 2: on the basis of the first time, join the push rod, a spring diameter instead & Phi; 6, in the process of inversion, can do reverse the process of functioning, but found in the experiment, the elastic size slants big, when tight round cannot be installed on all the chain organization. Figure 5 3, conclusion of screw bearing and chain up through the reform of experiment, to say the preliminary has obtained certain achievement, also clear the direction of the next reform experiment. The next step will be taken from external bearing structure and chain installation, maintenance, when tight round continue to do the feasibility test study. Long period operation of polyacrylamide devices, in order to guarantee the smooth production of the device make its own contribution. References: 1] The chemical machinery, oil chemical industry press