American Journal of Science and Technology 2018; 5(4): 49-55 http://www.aascit.org/journal/ajst ISSN: 2375-3846 The Shortfalls of the Vacuum Valve Cotton Separator Salokhiddinova Makhliyo Nurmukhammad qizi 1,* , Muradov Rustam Muradovich 1 , Karimov Abdusamat Ismonovich 1 , Mardonov Botir Mardanovich 2 1 Department of Technology of the Initial Processing of Natural Fibers (Cotton), Namangan of Engineering and Technology Institute, Namangan, Uzbekistan 2 Department of Technology of the Initial Processing of Natural Fibers, Tashkent institute of Textile and Light Industry, Tashkent, Uzbekistan Email address Citation Salokhiddinova Makhliyo Nurmukhammad qizi, Muradov Rustam Muradovich, Karimov Abdusamat Ismonovich, Mardonov Botir Mardanovich. The Shortfalls of the Vacuum Valve Cotton Separator. American Journal of Science and Technology. Vol. 5, No. 4, 2018, pp. 49-55. Received: June 2, 2018; Accepted: July 2, 2018; Published: October 19, 2018 Abstract: Working principles of the separators used in cotton processing enterprises have been studied in the article. The parameters of the separator which negatively impact on the quality indicators of cotton have been analyzed. On the basis of studied parameters, a new construction of the separator was suggested which has inclined mesh surface and separates the air from cotton. The movements of raw cotton in an inclined surface are considered. The differential equation of motion is compiled and the necessary results obtained. Keywords: Cotton Separator, Pneumatic Transport, Vacuum Valve, Mesh Surface, Scrubber, Working Camera, Cotton 1. Introduction In present cotton cleaning plants pneumatic transport is widely being used for delivering the cotton to the manufacturing process and for carrying the separated cotton fiber, lint and fibrous waste materials. The reasons of the widespread usage of pneumatic transport in cotton-cleaning plants are the simplified constructions of details of pneumatic transport, easiness in separating out and installing, occupation of little place, preserving of particular natural qualities and preventing from destruction while carrying the good to places located in any difficult directions, cleaning of raw cotton, being carried, from different contaminants and not interfering with the movement of transport inside the enterprise. [1-2, 4-8]. The main element of the pneumatic transport is the separator. A separator is required to separate air from the raw cotton. While using of pneumatic method of transporting the raw cotton moving at the high speed winds up around the propeller of ventilator, consequently it may be the cause for the damage to fibers and seeds. For this reason separator is installed before ventilator in pneumatic transports in order to separate the air from the raw cotton. Therefore, there is the impact of cotton movement on force of gravity, mass inertia and ax fugal power of operating stream. It’s known that the separators have been installed either in movable or stationary way in cotton cleaning plants and they include two main parts: separation and release. In turn, these parts also divide into structural elements. For instance, separating part consist of mesh surface and scrubber but releasing part (vacuum valve) consists of cylindrical surface and blades of drum. The vacuum valve, which is the main part of the separator, has a big importance in a proper functional operation. The main function of the vacuum valve in the operation camera of separator is to bring out separated from air raw cotton on time. 2. Method 2.1. The Shortcomings of Vacuum Valve of Cotton Separator As in many other spheres, the separator has also its own shortfalls.