Centrifuge running wheel

Abstract

The invention discloses a centrifuge running wheel, comprising a running wheel body and a composite material outer wheel; the outer circle of the running wheel body is provided with a plurality of key slots, and the cross-sectional profile of each key slot is a smooth arc; the inner circle of the composite material outer wheel is provided with a plurality of keys that are closely matched with the key slots of the running wheel body; a fastening retaining ring is closely provided on both sides of the running wheel body, and the fastening retaining ring is fastened to the running wheel body by bolts to limit the movement of the composite material outer wheel on the axis of the running wheel body; the key is embedded in the key slot, and a gap is formed between the key and the inner side of the key slot. The centrifuge running wheel provided by the invention has the following significant effects: the noise is reduced by 15-20dB; the noise frequency becomes lower, and the stimulation to the human body is weakened; the propagation distance is reduced; and the noise blocking effect of the sound insulation facilities on the noise is particularly significant.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete centrifuges, and in particular relates to a centrifuge running wheel. Background Art

[0002] With the deepening of environmental supervision, the improvement of people's living standards, the enhancement of everyone's self-protection awareness, the quality of the employment environment, and whether it meets the national occupational health licensing standards have become important factors affecting whether an enterprise can develop healthily and sustainably.

[0003] As far as reinforced concrete pole and pipe pile enterprises are concerned, the first two of the three major environmental killers, air, water and noise, are not polluting and are relatively easy to solve. Only the noise, because the centrifugal forming process of the 1950s and 1960s is still used, and the centrifuge runner and steel mold are made of steel, when the steel mold rotates at high speed on the centrifuge, due to dynamic balance and parabola, the steel mold and the centrifuge runner will collide violently, and there will also be intermittent knocking sounds and friction sounds. The sound can reach 110 decibels when it is loud, far exceeding the provisions of the occupational health license standards. Summary of the invention

[0004] The purpose of the present invention is to provide a centrifuge running wheel in view of the deficiencies of the prior art, so as to solve the problem of noise pollution caused by collision between the existing steel mold and the centrifuge running wheel.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] Provided is a centrifuge running wheel, comprising a running wheel body and a composite material outer wheel; the outer circle of the running wheel body is provided with a plurality of key slots, and the cross-sectional profile of each key slot is a smooth arc; the inner circle of the composite material outer wheel is provided with a plurality of protruding keys that are closely matched with the key slots of the running wheel body; a fastening retaining ring is tightly provided on both side surfaces of the running wheel body, and the fastening retaining ring is fastened to the running wheel body by bolts to limit the movement of the composite material outer wheel on the axis of the running wheel body; the key is embedded in the key slot, and a gap is formed between the key and the inner side of the key slot.

[0007] Preferably, the running wheel body is made of steel material, which is processed from cast steel or steel billet, and a plurality of key slots are provided on the outer circle, and a plurality of screw holes evenly distributed around the circumference are provided on the two side surfaces.

[0008] Preferably, the gap width between the key and the keyway is 5 mm.

[0009] Preferably, the key of the composite material outer wheel is embedded in the keyway of the running wheel body by extrusion assembly to achieve the connection between the inner circle of the composite material outer wheel and the outer circle of the running wheel body; the keyway and the key are rounded at the tip.

[0010] Preferably, the fastening retaining ring is provided with bolt through holes corresponding to the running wheel body, and is fixed to the running wheel body by bolts.

[0011] Preferably, the radius R1 corresponding to the inner arc of the key is 6 mm, and the radius R2 corresponding to the outer arc of the key is 10 mm.

[0012] A composite material outer wheel formula for centrifuge running, which includes the following parts by weight:

[0013] 8-10 parts of polyetheretherketone, 10-20 parts of polyoxymethylene, 90-110 parts of polyamide, 15-19 parts of polypropylene fiber, 10-30 parts of engineering plastics, 7-13 parts of polyethylene glycol, 2-5 parts of carbon fiber, 35-40 parts of glass fiber, 5-8 parts of cellulose whiskers, 1-2 parts of antioxidant, 1-5 parts of urea, 2-5 parts of dimethylethanolamine, 12-20 parts of polyphenylene sulfide, and 15-20 parts of wear-resistant additive.

[0014] Preferably, the engineering plastic includes: one or a mixture of two or more of glass fiber, carbon fiber reinforced polycarbonate, polyamide, polyphenylene ether, polyphenylene sulfide, and polytetrafluoroethylene.

[0015] Preferably, the wear-resistant additive includes: 5-6 parts of polytetrafluoroethylene resin, 3-5 parts of molybdenum disulfide, 2-6 parts of graphite, 1-2 parts of fluoroplastic fine powder and 4-5 parts of organosilicon fine powder.

[0016] Preferably, the method for preparing the composite outer wheel formula comprises:

[0017] Polyetheretherketone, polyoxymethylene, polyamide, polypropylene fiber, engineering plastics and polyethylene glycol are mixed according to weight ratio, heated and stirred for 20-30 minutes, and when the temperature reaches 52-67°C, carbon fiber, glass fiber and antioxidant are added according to weight ratio, heated and stirred for 10-20 minutes, and when the temperature reaches 110-120°C, stirring is stopped, and the mixture is cooled to obtain a mixture A;

[0018] Mix urea, dimethylethanolamine and polyphenylene sulfide according to weight ratio, heat and stir for 14-25 minutes, add mixture A when the temperature reaches 70-80°C, continue heating and stirring for 10-20 minutes, add wear-resistant additive and cellulose whisker when the temperature reaches 90-95°C, heat and stir for 15-30 minutes, stop heating and stirring when the temperature reaches 100-120°C, cool to 30-40°C to obtain mixture B;

[0019] Put the pasty mixture B after the polymerization reaction into the casting mold designed and made according to the shrinkage rate of 2%, and centrifuge it for 25 minutes. After the material is densely solidified, remove it from the mold to obtain the blank of the composite material outer wheel. The blank is humidified in boiling water or saturated potassium acetate solution for 24 hours to eliminate its internal stress.

[0020] The centrifuge running wheel provided by the present invention has the following beneficial effects:

[0021] The centrifuge running wheel provided by the present invention has the following remarkable effects: noise is reduced by 15-20dB; noise frequency becomes lower and stimulation to human body is weakened; propagation distance is reduced; and the noise blocking effect of sound insulation facilities on noise is particularly remarkable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of the centrifuge wheel.

[0023] Figure 2 This is a structural diagram of the longitudinal section of the centrifuge wheel.

[0024] Figure 3 This is a structural diagram of the composite outer wheel of a centrifuge running wheel.

[0025] Figure 4 This is a structural diagram of the centrifuge running wheel body.

[0026] Figure 5 This is the exploded view of the centrifuge wheel assembly.

[0027] Figure 6 Tighten the retaining ring for the centrifuge wheel.

[0028] Among them, 1. running wheel body; 2. composite material outer wheel; 3. fastening retaining ring; 4. bolt; 5. key; 6. key position fillet; 7. keyway; 8. keyway fillet; 9. screw hole; 10. bolt through hole. DETAILED DESCRIPTION

[0029] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0030] According to one embodiment of the present application, referring to Figure 1 , Figure 2 and Figure 5 The centrifuge running wheel of the present invention comprises a running wheel body 1 and a composite outer wheel 2. The composite outer wheel 2 is squeezed and embedded into the running wheel body 1, and fastening retaining rings 3 of exactly the same shape and size are fixed on both sides of the running wheel body 1. After the composite outer wheel 2 is used many times, its width will increase and extend to the edges on both sides, and the fastening retaining ring 3 can prevent it from expanding outward, thereby increasing its service life.

[0031] refer to Figure 3The inner circle of the composite outer wheel 2 is provided with twelve protruding keys 5, and the sharp corners of the keys 5 are rounded to eliminate stress concentration, improve the fracture strength of the outer wheel, and meet the requirements of working load and service life. The cross section of the key 5 is a straight key or an involute spline, and the side of the key is a key position fillet 6, which is set in an arc shape to increase the fit with the keyway.

[0032] refer to Figure 6 The fastening retaining ring 3 is processed from a cast steel blank or a steel plate blank according to the design requirements, and is formed by turning and drilling the bolt through hole 4. Conventional mechanical processing technology can be completed, the material is easy to purchase, and it is suitable for large-scale production according to this application.

[0033] refer to Figure 5 , lay the running wheel body 1 flat, press the composite outer wheel 2 into the press, align the key 5 with the keyway 7, and the matching grade is H8 / s7. The running wheel body 1 and the composite outer wheel 2 are combined into a whole without relative movement. A keyway fillet 8 is provided in the keyway 7. When the key 5 is matched with the keyway 7, a 5mm gap is left between the key 5 and the keyway 7. After multiple uses, the composite outer wheel 2 is deformed. The gap can accommodate the deformation of the composite outer wheel 2 to avoid bulging of the composite outer wheel 2, which seriously affects its practical effect.

[0034] According to one embodiment of the present application, a formula for a composite outer wheel 2 includes the following parts by weight:

[0035] 8-10 parts of polyetheretherketone, 10-20 parts of polyoxymethylene, 90-110 parts of polyamide, 15-19 parts of polypropylene fiber, 10-30 parts of engineering plastics, 7-13 parts of polyethylene glycol, 2-5 parts of carbon fiber, 35-40 parts of glass fiber, 5-8 parts of cellulose whiskers, 1-2 parts of antioxidant, 1-5 parts of urea, 2-5 parts of dimethylethanolamine, 12-20 parts of polyphenylene sulfide, and 15-20 parts of wear-resistant additive.

[0036] Engineering plastics include: glass fiber, carbon fiber reinforced polycarbonate, polyamide, polyphenylene ether, polyphenylene sulfide, polytetrafluoroethylene, one or a mixture of two or more thereof.

[0037] The wear-resistant additive comprises: 5-6 parts of polytetrafluoroethylene resin, 3-5 parts of molybdenum disulfide, 2-6 parts of graphite, 1-2 parts of fluoroplastic fine powder and 4-5 parts of organic silicon fine powder.

[0038] The method for making the composite material outer wheel 2 formula comprises:

[0039] Polyetheretherketone, polyoxymethylene, polyamide, polypropylene fiber, engineering plastics and polyethylene glycol are mixed according to weight ratio, heated and stirred for 20-30 minutes, and when the temperature reaches 52-67°C, carbon fiber, glass fiber and antioxidant are added according to weight ratio, heated and stirred for 10-20 minutes, and when the temperature reaches 110-120°C, stirring is stopped, and the mixture is cooled to obtain a mixture A;

[0040] Mix urea, dimethylethanolamine and polyphenylene sulfide according to weight ratio, heat and stir for 14-25 minutes, add mixture A when the temperature reaches 70-80°C, continue heating and stirring for 10-20 minutes, add wear-resistant additive and cellulose whisker when the temperature reaches 90-95°C, heat and stir for 15-30 minutes, stop heating and stirring when the temperature reaches 100-120°C, cool to 30-40°C to obtain mixture B;

[0041] The paste mixture B after polymerization reaction is put into the casting mold designed and manufactured according to 2% shrinkage rate, and centrifuge for 25 minutes. After the material is densely solidified, it is demoulded to obtain the blank of the composite material outer wheel 2. The blank is humidified in boiling water or saturated potassium acetate solution for 24 hours to eliminate its internal stress.

[0042] The composite outer wheel 22 obtained by the above process has the following performance characteristics:

[0043] Tensile strength ≥220MPa;

[0044] Bending strength ≥350MPa;

[0045] Flexural modulus ≥ 22GPa;

[0046] Notched impact strength ≥100J / m;

[0047] Rockwell hardness ≥95M scale;

[0048] Friction coefficient ≤ 0.25;

[0049] Wear ≤3.0mg

[0050] The composite material outer wheel 2 adopts ultra-high molecular polymer and is reinforced with glass fiber and fiber whisker (nanoscale), and wear-resistant additives are added to make the composite material into a microscopic porous, high-strength, and highly wear-resistant organizational structure. This organizational structure has the ability to absorb the impact of the steel mold, thereby reducing noise; and the frequency of the noise is much lower than that of the noise emitted by the steel wheel, which reduces the harm to the environment and humans, and the propagation of noise is significantly controlled; due to the use of high-strength fiber reinforcement, the outer wheel meets the use requirements in terms of strength and service life.

[0051] In addition, when the composite material outer wheel 2 is just in operation, its surface is sintered. Due to the extrusion of the surface, the molecular structure of its surface becomes compact, and a wear-resistant layer is formed on the surface, thereby increasing the wear resistance of the composite material outer wheel 2.

[0052] The centrifuge running wheel provided by the present invention has the following remarkable effects: noise is reduced by 15-20dB; noise frequency becomes lower and stimulation to human body is weakened; propagation distance is reduced; and the noise blocking effect of sound insulation facilities on noise is particularly remarkable.

[0053] Although the specific implementation of the invention is described in detail in conjunction with the drawings, it should not be understood as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A centrifuge running wheel, characterized in that: The invention comprises a running wheel body and a composite material outer wheel; the outer circle of the running wheel body is provided with a plurality of key grooves, and the cross-sectional profile of each key groove is a smooth arc; the inner circle of the composite material outer wheel is provided with a plurality of protruding keys that are closely matched with the key grooves of the running wheel body; a fastening retaining ring is closely provided on both sides of the running wheel body, and the fastening retaining ring is fastened to the running wheel body by bolts to limit the movement of the composite material outer wheel on the axis of the running wheel body; the key is embedded in the key groove, and a gap is formed between the key and the inner side of the key groove; The running wheel body is made of steel material, which is processed from cast steel or steel billet, with a plurality of key slots on the outer circle and a plurality of screw holes evenly distributed on the two sides; The width of the gap between the key and the keyway is 5 mm; By extrusion assembly, the key of the composite material outer wheel is embedded in the keyway of the running wheel body to achieve the connection between the inner circle of the composite material outer wheel and the outer circle of the running wheel body; the keyway and the key are designed with rounded corners at the sharp points; The fastening retaining ring is provided with bolt holes corresponding to the running wheel body and is fixed to the running wheel body by bolts; The composite material outer wheel is extruded and embedded in the running wheel body, and fastening retaining rings with exactly the same shape and size are fixed on both sides of the running wheel body; the fastening retaining rings prevent the composite material outer wheel from expanding outwards; Lay the running wheel body flat, press the composite outer wheel into the press, align the key with the keyway, and the matching grade is H8 / s7; the running wheel body and the composite outer wheel are combined into a whole without relative movement; the keyway is provided with a keyway fillet, and when the key and the keyway are matched, the gap between the key and the keyway accommodates the deformation of the composite outer wheel; The radius R1 corresponding to the inner arc of the key is 6 mm, and the radius R2 corresponding to the outer arc is 10 mm; The composite outer wheel formula includes the following parts by weight: 8-10 parts of polyetheretherketone, 10-20 parts of polyoxymethylene, 90-110 parts of polyamide, 15-19 parts of polypropylene fiber, 10-30 parts of engineering plastics, 7-13 parts of polyethylene glycol, 2-5 parts of carbon fiber, 35-40 parts of glass fiber, 5-8 parts of cellulose whisker, 1-2 parts of antioxidant, 1-5 parts of urea, 2-5 parts of dimethylethanolamine, 12-20 parts of polyphenylene sulfide, and 15-20 parts of wear-resistant additive; The engineering plastics include: one or a mixture of two or more of glass fiber, carbon fiber reinforced polycarbonate, polyamide, polyphenylene ether, polyphenylene sulfide, and polytetrafluoroethylene; The wear-resistant additive comprises: 5-6 parts of polytetrafluoroethylene resin, 3-5 parts of molybdenum disulfide, 2-6 parts of graphite, 1-2 parts of fluoroplastic fine powder and 4-5 parts of organic silicon fine powder; The method for preparing the composite outer wheel formula comprises: Polyetheretherketone, polyoxymethylene, polyamide, polypropylene fiber, engineering plastics and polyethylene glycol are mixed according to weight ratio, heated and stirred for 20-30 minutes, and when the temperature reaches 52-67°C, carbon fiber, glass fiber and antioxidant are added according to weight ratio, heated and stirred for 10-20 minutes, and when the temperature reaches 110-120°C, stirring is stopped, and the mixture is cooled to obtain a mixture A; Mix urea, dimethylethanolamine and polyphenylene sulfide according to weight ratio, heat and stir for 14-25 minutes, add mixture A when the temperature reaches 70-80°C, continue heating and stirring for 10-20 minutes, add wear-resistant additive and cellulose whisker when the temperature reaches 90-95°C, heat and stir for 15-30 minutes, stop heating and stirring when the temperature reaches 100-120°C, cool to 30-40°C to obtain mixture B; Put the pasty mixture B after the polymerization reaction into the casting mold designed and made according to the shrinkage rate of 2%, and centrifuge it for 25 minutes. After the material is densely solidified, remove it from the mold to obtain the blank of the composite material outer wheel. The blank is humidified in boiling water or saturated potassium acetate solution for 24 hours to eliminate its internal stress.

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