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2 Air compressor parameters The air compressor is the product of Liuzhou Second Air Compressor Plant, model VW22/7, which is 45° for the V-structure cylinder and the horizontal plane. The technical parameters are: the compressor weight is 35kN motor power; 132kW type; ¥ type, double cylinder, double acting, water cooling, fixed piston type harmonic horizontal disturbance; P=3kN two harmonic horizontal disturbance harmonic vertical disturbance two harmonic vertical disturbance: mouth=0 3 air compressor basic design Ideas and methods Due to the tight schedule, the geological survey was not carried out before the basic design. The design only refers to the basic map size provided by the manufacturer according to the “Power Basic Design Specification†and “hereinafter referred to as the standard for verification. The basic dimensions provided by the manufacturer: length x width x height is 2400xl840x 1200, the actual design size is adjusted to 2600x0x 195011 as shown in Figure 1. The design requires the bearing layer to be the original ± hard plastic layer, and the ground endurance reaches fL30.15Pa.
2 2 0.64 is the distance from the base top to the foundation. The unit frequency: sub-reality air compressor is the basis of the field. The amplitude of the vertical disturbance to the field, the amplitude of the X-axis and the level of the disturbance: 4 Reason analysis From the calculation point of view, if the foundation strength meets the design requirements, ie, the margin. At that time, we exchanged the design situation with the technicians of the manufacturers. They also said that the basic design is feasible.
Asked where to draw it, according to the situation of the excavation of the adjacent air compressor foundation, it can be seen that the actual foundation bearing layer is soft plastic ± layer, ± weak and weak, even the wall of the hole dig can not stand , the endurance can only be taken to £, = 0.08Pa, according to the "motion rules", the compressive stiffness is, = 15000kN / 2, far two, the design considers the shock absorber, and the sand layer with a thickness of about 1501 is set on the vertical wall of the foundation. After the foundation is applied, the cement mortar is not covered in time. The construction water infiltrates the bottom and the periphery of the foundation, which makes the foundation softer, the bearing capacity and rigidity are reduced, and the damping ratio is reduced.
5 Decrease measures The foundation is built in the original machine room, and the base area is limited. The main force direction of the foundation is only l from the inner wall. It is impossible to increase the ceiling area and strengthen the base stiffness. To reduce the dexterity, it is necessary to improve the basic compressive stiffness, shear stiffness and damping ratio. According to the situation of the site, the supervisory company's chief engineer proposed the method of adding and surrounding the beam, and the parties agreed. The specific method is: the depth of the excavation 00 in the original base four corners is 6000, and the steel cages are arranged in length, between skill and dryness. Use four steel bars to coagulate ± beam sectioning "connection, when constructing the beam, cut the coagulation ± protective layer at the joint of the original foundation and the beam, and weld the vertical reinforcement of the original foundation with the beam of the beam, so that the beam and The foundation is combined into a whole.
After the foundation reinforcement, the base compression stiffness avoids the resonance zone of the unit, effectively reducing the amplitude of the foundation; in addition, the use of the planting force and the end bearing force of the six underground masses is a hard plastic layer, effectively The basic bearing capacity is smashed. After the basic treatment, the amplitude reached the specified requirements. Although the wall of the surrounding beam is only 2001, the influence of the wall foundation is very small. So far, the air compressor has been running for many years, and all aspects are normal, which proves that the basic vibration reduction is successful.
6 Conclusion Air compressors are piston compressors. For the design of this power foundation, first complete raw materials should be obtained, such as the model, speed, weight and weight position of the machine, the harmonic interference, the disturbance torque and its effect. Location, especially to obtain accurate geological survey data. The speed of the large and medium-sized piston compressors is at the bottom of such machines. The frequency of the machine's disturbance is often close to the natural frequency of the foundation, which makes the unit operate in the resonance zone, thus causing a large resonance amplitude. Be careful to open the resonance area as much as possible.
Air compressor basic design and shock absorption treatment
Air compressor basic design and shock absorption treatment Jiangzhou Guangzhou Iron and Steel Group Design Institute skillfully wants to describe the basic design process of air compressors in this paper, analyzes the reasons for its excessive amplitude, proposes vibration reduction methods, and summarizes the basics of piston compressors. Design issues and design ideas should be noted.
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