RU2582330C1 - Method of improving sliding skates - Google Patents

Abstract

FIELD: sport.

SUBSTANCE: invention relates to skating and is intended to improve sliding of skates on ice. Method of improving sliding of skates by wetting working surface of skate with liquid from a reservoir fixed above blade, from which liquid is supplied in two channels in head and middle part of working surface through oblique openings in slide on inner side, with output, maximum close to inner edge of skid. Input hole is inclined relative to output in direction of motion, and speed of liquid flow is controlled by jet at outlet of reservoir.

EFFECT: technical result consists in reduction of friction coefficient between ice and blades of skates.

1 cl

Description

 Several methods are known for improving skate slip. Among them: the insertion of a plastic strip along the middle of the working surface of the ridge, the application of sliding coatings on the working surface, etc.

 As a simpler and more reliable method, it is proposed to improve sliding by wetting the working surface of the ridge with liquid (in a particular case, water) from a reservoir (in a particular case, heated or thermally protected) fixed above the blade (skid), from which the liquid flows through two channels into the head and middle parts of the working surface through oblique holes made in the runner from the inside, with the exit as close as possible to the inner edge of the runner, and the hole entrance is inclined with respect to exit in the direction of motion and the speed of liquid outflow is adjustable restrictor at the outlet of the reservoir.

 The desire to wet the inner edge of the runner is due to the fact that during normal athlete run, only about a fifth of the runner comes into contact with ice.

 As a liquid, a weak solution of sodium chloride or other solvent reagent can be used to enhance the melting of ice.

 The beginning of the fluid flow occurs when the plug is pulled out of the hole located at the top of the tank.

шероховатостей поверхности льда. На хорошо подготовленной ледовой дорожке $$$$

$$\sigma$$

~50 мкм. Тогда при скорости конькобежца, равной 10 м/с, секундный расход воды составит: 0,2 х 3 мм х 0,05 мм х 5 м=0,15 см³ объема воды в резервуаре, равного 10 см³, хватит на 66 секунд - на 500-метровку.An approximate calculation of the effectiveness of the method is based on the assumption that the coefficient of friction of the ridge on ice decreases significantly (by 25-50%) when a wetting stream of water with a height equal to the rms value is applied (to the area of contact between the ridge and ice) $$\sigma$$

surface roughness ice. On a well-prepared ice track $$$$

$$\sigma$$

~ 50 microns. Then, at a skater speed of 10 m / s, the second water consumption will be: 0.2 x 3 mm x 0.05 mm x 5 m = 0.15 cm ^{3 the} volume of water in the tank equal to 10 cm ³ will last for 66 seconds - to the 500 meter.

 On the other hand, from the article of V.P. Danilov [1] it follows that the use of the composition “potassium acetate + potassium formate” as a reagent provides a melting capacity of 24 at an ice temperature of -6 ° C at a reagent concentration of 4%. This means that the reagent solution will last for 64 seconds. The results are close. A final assessment of the effectiveness of the method will be presented on the basis of test results before substantive examination.

 Literature

1. Article of Danilov V.P. and other Low-temperature deicing compositions in water-salt solutions, including acetates and formates // Chemical technology, 2011, No. 3.

Claims (1)

A way to improve the skate slip by wetting the working surface of the ridge with liquid (in the particular case, water) from a reservoir (in the particular case, heated or heat-proof) fixed above the blade (skid), from which the liquid flows through two channels into the head and middle part of the working surface through oblique holes made in the runner from the inside, with the exit as close as possible to the inner edge of the runner, and the entrance of the hole is inclined with respect to the exit in the direction of movement, and the speed eniya regulated fluid jet at the outlet of the reservoir.