SU503427A1 - Throttle - Google Patents

Description

The invention relates to hydraulic flow controllers and can be used, for example, in machine tools. A choke is known with at least one pass channel formed between a stationary body and a rotor driven in rotation, the proposed choke differs from what is known, that the passage channel is formed by the end of a rotor made in the form of a flat disk and rigidly fixed in the case a sleeve, the material of which has a linear expansion coefficient greater than the linear expansion coefficient of the material of the body, and the flow channels are formed at both ends of the rotor, and These sleeves are made annular grooves connected by radial channels. Such an embodiment of the throttles allows for temperature stabilization of the flow rate. Fig, 1 shows the proposed choke, a longitudinal section; FIG. 2 is a section A-D in FIG. one; Fig. 3 shows the design of the throttles with several channels; Fig, 4 - times cut BB on. Fig, 3 / Fig, 5 - Consolation of throttles with several channels at both ends of the rotor, Fig, choke, section BB, in Fig. 4,. The passageway 1 of the throttle is formed by the end of the rotor 2 and the sleeve 3, rigidly fixed in the housing 4, the sleeve is made of a material with a linear expansion coefficient greater than that of the material of the housing. The rotor 2 is coupled to the drive through shaft 5, the channel depth and its length are determined by the relationship

0ut2. where f is the dynamic viscosity coefficient t of the working fluid; 1i is the depth of the passage; L is the length of the passage; p is the mass / density of the fluid; P is the pressure drop across the throttle. The sleeve length is chosen in accordance with the ratio S iv4opn) (t-t,) where "is the coefficient depending on the size ratio of the passage channel; the temperature of the working fluid is minimal; . maximum temperature of working fluid; 1 is the exponent depending on the type of working fluid; coefficient of linear expansion of the sleeve material; the coefficient of linear expansion of the material of the body, limiting the flow channel along the circumference is set inset 6. The rotor is pressed, for example, by a spring-loaded ball 7 installed in the lid 8, the Liquid enters the inlet 9 and leaves the throttles through channel 10, For varying degrees A number of bushings can be installed with the formation of a series of through-channels, having autonomous inlet and outlet openings or connected through circular grooves 11 and channels 12, 13 and 14 (FIGS. -3-6), annular grooves ki 11 improves heat transfer from the working fluid to the material of the sleeve 3, Passage1} channels can be formed at both ends of the rotor 2, with; This sleeve 3 is installed in two housings 4 (Fig, 5). The work of the throttles is similar to that described,

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Claims (4)

1. THROTTLE, with at least one passage channel formed between the stationary body and placed inside it driven by a rotor, characterized in that, for the purpose of temperature stabilization of the flow, the passage channel is formed between the rotor and the liner rigidly fixed inside the housing, material which has a linear expansion coefficient greater than the linear expansion coefficient of the housing material. 2. Throttle in π. 1, which includes the fact that the rotor is made in the form of a flat disk, and the liner is in the form of a sleeve. 3. The throttle in paragraphs. 1 and 2, characterized in that the passage channels are formed from both ends of the rotor. 4. The throttle in paragraphs. 1-3, which is distinguished by the fact that on the outer surface of the bushings there are made g annular grooves interconnected by radial channels. imos ^{, u} ns