<<
>>

definition of rational is constructive-technological parametres of the shower mixer rotornogo a type on the basis of experimental researches

The analysis of influence of factors on response function has shown, that at an estimation of their sizes in joint influence, such as quality of a ready product and the minimum/maximum values of the basic specific indicators, in our case of the specific expense of the electric power answer to the purpose and the problems put in work (fig.

4.27).

One of indicators of quality of concrete is its durability. As well as at all gravels, an ultimate strength of concrete at compression it is considerable (in 10... 15 times) above, than at a tensioning and a bending down. Therefore in building designs concrete, as a rule, works on compression. Distinctive feature of concrete — considerable heterogeneity of its properties. It speaks variability as raw materials (sand, a coarse aggregate and
Cement), infringement of a mode of a preparation of concrete, its transportation, packing (degree of compaction) and conditions tverdenija. All it leads to scatter of durability of concrete of one class. I.e. the above culture of manufacture (quality of preparation of materials is better, preparations, etc.), the will be possible vacillatings of its durability less.

Drawing 4.27. The schedules showing a parity of least (mixture in a current 67с) and the greatest (mixture in a current 50с) an ultimate strength on compression of the sample and expenses of the electric power corresponding to them for all range of change of values of length of blades and a rotor rotating speed of equal 26-27 mines-1

Changes of value of an ultimate strength have ubyvajushche-increasing character, and the electric power expense decreasing with increase in length of the blade. Desirable values of an ultimate strength (more than 19 MPa at mixing time in 50) are characteristic as at use of the blade of the smaller size of 0,14 m, and for the blade bolshego the size of 0,18 m. And, the specific expense of the electric power at mixing by blades of the smaller size is a little bit more. That it is possible to explain to that blades of the small size, having the same geometrical parametres, as blades bolshego the size, do not provide desirable circulation of a mix from an external wall to internal and back in a shower mixer bowl (fig. 4.28, 4.29).

Drawing 4.28. An example of loss of a material from circulation at hashing

I.e., behind the blade there is a part of a material which drops out of mix circulation on one turn of a rotor, further the circulation cycle repeats with loss of a part of a material that has continuous character, and it essentially reduces efficiency of mixing.

Key parametres of process of mixing at which concrete samples by durability more than 19 MPa are received at concentration of the coarse aggregate changing within 49,4-52 %, at the specific expense of the electric power 0,2 кВт*ч/т are defined, namely the rotor rotating speed is equal 27 mines-1, time of mixing 50 with, length of blades 0,18м.

Drawing 4.29. An example of loss of a material from circulation at hashing (top view)

4.4.

<< | >>
A source: MATUSOV MICHAEL GENNADEVICH. PERFECTION of PROCESSES of LOADING And MIXING In ROTORNOM the SHOWER MIXER With TYPE BLADES GELIKOIDNOGO. The DISSERTATION on scientific degree competition Cand.Tech.Sci. Belgorod - 2018. 2018

More on topic definition of rational is constructive-technological parametres of the shower mixer rotornogo a type on the basis of experimental researches:

  1. definition of the purpose and problems of experimental researches rotornogo the shower mixer with blades gelikoidnogo a type
  2. results of experimental researches of influence of constructive and technological parametres of the shower mixer on quality indicators of process of mixing
  3. CHAPTER 3. SUBSTANTIVE PROVISIONS ON CARRYING OUT OF EXPERIMENTAL RESEARCHES OF PROCESS OF MIXING AND DESIGN ROTORNOGO OF THE SHOWER MIXER WITH TYPE BLADES GELIKOIDNOGO
  4. CHAPTER 4. EXPERIMENTAL RESEARCHES OF INFLUENCE OF IS CONSTRUCTIVE-TECHNOLOGICAL PARAMETERS OF THE SHOWER MIXER WITH THE HIGH-SPEED OPERATING MODE ON EFFICIENCY OF PROCESSOF MIXING
  5. 4.3.1. Research of dependence of the specific expense of the electric power of the shower mixer from its constructive and technological parametres
  6. interrelation definition between design data of a drum head of the shower mixer and technological parametres
  7. CHAPTER 4. EXPERIMENTAL RESEARCHES OF INFLUENCE OF IS CONSTRUCTIVE-TECHNOLOGICAL PARAMETERS OF THE PLANETARY MIXER ON EFFICIENCY OF PROCESS OF MIXING
  8. 4.4. Definition of rational operating modes of the shower mixer on the basis of the analysis of influence of major factors on response function
  9. dependence of an ultimate strength of concrete on compression from konstruktivnoyotehnologicheskih parametres rotornogo the shower mixer σ =f (n, t, l)
  10. the analysis of techniques of definition of the basic is constructive-technological parametres in high-speed shower mixers with a vertical arrangement lopastnogo the bulwark
  11. experimental researches of change of the specific expense of electric energy and quality indicators of process of mixture from is constructive-technological parametres
  12. an offered design rotornogo the shower mixer