Small direct-connect reciprocating piston air compressors mainly face the DIY (DoIt Yourself) home market, and some of them are limited to indoor use. Therefore, the market has the following requirements for several major performance parameters for such small air compressors: low temperature rise, low noise, and low vibration. The low temperature rise is a requirement for small air compressors from the perspective of energy conservation and environmental protection. It is required that such power tools should do less heat work (useless work), reduce waste energy, reduce unnecessary emissions, and reduce environmental impact. . The low noise is a requirement for small air compressors from the perspective of environmental protection. It is required that such power tools should reduce noise pollution while doing work, and create a comfortable and pleasant environment for operators. The small vibration is mainly required to have a good mechanical balance of the small direct-connected reciprocating piston air compressor. Generally speaking, it has to have good running stability. With the increasingly fierce competition in the international market today, with the gradual improvement of energy conservation and environmental awareness in the world, the requirements for the above three performances of small direct-connect reciprocating piston air compressors are becoming more and more rampant. Multi-directional fine-tuning platform mechanism 3 effect Compared with this special platform, it has strong flexibility and convenience. After being used by people, it provides great convenience for the installation and debugging of the isolation switch operating mechanism in the new and modified substation. It has gained valuable time, shortened the construction period, and achieved the purpose of multi-power supply. It solved the problem that the isolation switch operating mechanism is difficult to install and the installation takes a long time, and achieved good results. The effect pairs before and after using the platform are shown in Table 1. Table 1 before and after the use of dedicated platform effect comparison unit: min project before using a dedicated platform time-consuming use of a dedicated platform after the time is less than the time saved before the transportation positioning adjustment installation of fixed equipment clearing time requires time 1 combined with "mechanical balance" for product design machinery During operation, the unbalanced inertial forces generated by the components will cause additional dynamic pressure in the moving web. This not only increases the friction in the moving web and the internal stress in the component, but also reduces the mechanical efficiency and service life. Moreover, since these inertial forces generally change periodically, it will inevitably lead to forced vibration of the machine and its foundation. If the frequency is close to the natural frequency of the machine, it will not only affect the machine itself, but also affect or even destroy the nearby working machinery, plant, building, etc. Taking into account the above effects caused by "bad vibration", we must design the product in combination with mechanical balance in the early stage of mechanical design. The purpose of mechanical balancing is to try to balance the unbalanced inertial forces of the components, thereby reducing their adverse effects. The following analysis is carried out through specific cases. 1.1 Under the same cylinder diameter, the more the number of cylinders, the better the operation principle of the small direct-connected reciprocating piston air compressor is basically the same as that of the automobile engine. The circular motion of the connecting rod and the piston assembly is driven by the circular motion of the crank (). It can be seen from Table 1 that after using the dedicated platform, the installation time is reduced by about 61%, and the installation quality is improved, the work efficiency is improved, the installation time is saved, the power supply reliability is ensured, and the economy is improved. benefit. 4 Conclusion The completion of the special installation platform for the large isolation switch operating mechanism not only solves the problems of low precision caused by the installation of the operating mechanism at the present stage due to the lack of proprietary tools, but also saves time and effort in the use process, effectively ensuring the installation. The safety of the staff filled the blanks of the Wenzhou Electric Power Bureau and the bureaus of the bureaus. They were highly valued by the leaders of the work area and prepared for mass production and promotion. , China Electric Power Enterprise Association Standardization Department electrical installation engineering construction and acceptance specification programming. Beijing: China Electric Power Press, 1996 Du Fu, Dong Weihui, Wang Dunzheng, etc. Improvement of GW4-110 isolation switch maintenance method and production of maintenance tools. Jiangsu Electrical Engineering, 2007 (2) Cheng Shi, mainly engaged in substation maintenance work. Lei Huan (1979*), male, Chinese Taiwanese, senior technician, assistant engineer, mainly engaged in substation maintenance work. The operation principle of small direct-connected reciprocating piston air compressor 1* gas shear 2* piston 3* connecting rod 4 crank 5* intake valve 6 car using 4 cylinder or 6 cylinder engine, the grade is more awkward car useful 8 Cylinder or 12 cylinder. Why do manufacturers not use 1 or 2 cylinders, which saves money and saves trouble. Numerous times of practice have proved that under the same cylinder diameter, the more the cylinder number, the larger the displacement, the better the power of the machine and the smoother the operation. This is also true for small direct-connect reciprocating piston air compressors. 1.2 Under the same arrangement, the large stroke and small stroke are adopted. Whether for the automobile or for the small air compressor, the displacement is the primary parameter that directly determines the performance of the product. Under the same amount of exhaust, the diameter of the cylinder should be as large as possible, but the stroke of the cylinder should be as small as possible, and the motor should be configured with multi-pole and low-speed as much as possible. The calculation formula of the displacement is as follows:; N is the number of cylinders; n is the crankshaft speed (r/min). According to the above formula, suppose we increase the diameter of the cylinder to 2 hills under the condition that the displacement is constant, we can reduce the stroke of the cylinder to the speed of the crankshaft to n/2. At the same time, We reduce the stroke of the cylinder and the speed of the crankshaft by half, and the corresponding noise and vibration of the whole machine will be reduced accordingly. The reduction is generally on the order of 12 masses. 2 The solution to the actual problem, research combined with the above design concept, designed a 24L small direct-connect reciprocating piston air compressor. In the design process, the various components of the machine and the entire mechanical mechanism have undergone 3D simulation, simulation, analysis and calculation. However, due to factors such as uneven material quality, casting defects, manufacturing errors, and installation errors, the final machine has such problems, especially vibration problems. The analysis and calculation of 3D is purely theoretical, and the actual things that are actually made will inevitably be different from the theoretical "model". At first, this small air compressor was like this: (1) the hand could not be placed statically on any part of the machine; (2) the whole machine was circumferentially yawed with one of the wheels as a fulcrum. Through the following improvements, the mechanical balance of the machine has become better. 2.1 Control motor The dynamic balance motor is a component that generates a power source. While providing energy for the crank-and-rod mechanism, it also idles while generating some by-products such as heat and bad vibration. Therefore, the balance of the motor itself is also very important. Solving the problem of dynamic balance of the rotor of the motor can be detected and corrected by means of a dedicated dynamic balancer. Simply select the accuracy level and calculate the remaining unbalanced amount allowed by the rotor according to the following formula: the motor rotor of the small tool and equipment type generally selects the accuracy grade 6.3; the rotor speed (r/min) is the rotor mass (kg); r is the rotor radius (mm). 2.2 Adjusting the eccentric weight of the crankshaft The actual crankshaft produced by the crankshaft is generally heavier than the theoretical 3D mass. This aspect is due to the fact that the material actually used by the supplier is not pure enough, with a certain proportion of other impurities; The inertia of the business, they hope that the more materials, the better. Therefore, in this case, the weighting part we originally set can not meet the needs of the mechanical balance of the actual parts. We must adjust the weight accordingly to re-establish the new balance. (1) A “weighted weight†method can be used to sequentially add a weight of equal weight to the weight of the crankshaft until the vibration meets the requirements. As for the quality of the average code is generally 5g or 10g, it can also be determined according to the quality of the crankshaft. (2) It is also possible to remove the material uniformly and symmetrically by using the method of “removing the weightâ€. The closer the quality of the portion of material removed is the better the number of parts greater than 3D mass. 2.3 The problem of increasing the distance between the vibration source and the vibration source can also do some padding work in the initial stage of the air compressor design. Since the 3D simulation analysis is mainly for some rigid parts (more accurate), even if the design pays attention to the position of the air press foot pad and the wheel, because the wheel and the foot pad have rubber and vibration damping parts, So the actual product still has some shortcomings. Now take a small straight-through reciprocating piston air compressor as an example to illustrate the adjustment method for this problem, as shown. According to the general layout of the whole machine, the force is simplified. Figure A - Air compressor foot pad B - Air compressor wheel O - Whole machine vibration through the initial design of the product is probably as shown in (a) The position of the wheel frame is basically coincident with the vibration source point. At this time, the distance between point A and point O is the largest. Everyone knows the principle of leverage: the bigger the arm, the less force it needs. For the state shown in (a), it is only necessary to apply a small "vibration inertial force" to point A to cause a large vibration or even movement of the tripod. For this kind of problem, the following two solutions can be used to solve: (1) Move the vibration 0 point inward, as shown in (b). This solution is the best solution to solve this problem. On the one hand, the force arm of point A is reduced, and on the other hand, point B is truly involved in the force, and part of the vibration inertia force is shared. The force at point A is made smaller, and the vibration stability is improved. (2) Move the wheel frame B outward, as shown in Figure (c). This is the preferred solution to the vibration problem for a complete machine layout with limited space structure. This solution only decomposes the original vibration inertial force, indirectly makes the force at point A smaller, and the vibration stability becomes better. 3 Conclusion The vibration problem is not as terrible as we all imagined. As long as we do a rigorous and meticulous work from the beginning of the design, after the product is made, the product can be operated normally through trial and adjustment. R research direction. Air compressor. Double Cone Rotary Vacuum Dryer Double Cone Rotary Vacuum Dryer,Double-Cone Vacuum Drying Machine,Rotary Drying Machine,Double Cone Rotary Dryer Wuxi Zhanghua Pharmaceutical Equipment Co. Ltd , https://www.wxzhanghua.com