SU1237751A1 - Apparatus for controlling load-handling and earth-moving mechanisms - Google Patents

Description

This invention relates to pneumatic control systems for excavators and cranes operating under negative temperature conditions.

The aim of the invention is to increase the reliability of the device and its efficiency.

The drawing shows a control device for lifting and digging mechanisms. .

The device consists of a piping system connected in series (air ducts) 1 of compressor 2, oil separator 3, receiver 4, two adsorbers 5 and 6 that work, as it were, heaters 7 with thermostats 8 fixed on each element of the preheater 7.

The device works as follows.

The humid compressed air from compressor 2 through the air duct 1 through the oil separator 3, the receiver A enters the drying in adsorber 5. The dried compressed air is supplied to the pneumatic equipment of the control system. At the same time, part of the dried air is directed to the second adsorber 6, which is in regeneration mode. The first in the course of the regenerating air-, spirit element of the heater includes-ChC and CHM

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tt

Editor M. Tsitkina

Compiled by A.Vinogradov

Tehred I. Gaidoga Proofreader M. Sharoshi

Order 3265/33 Circulation 641Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 4/5

Production and printing company, Uzhgorod, st. Project, 4

with thermostat and warms the air.

To the second element of the preheater, the regenerating air flows from

temperature The power consumed by the second element of the preheater is lower than the power of the first and consists of the cost of loss of the adsorber's body of a given volume into the environment and the necessary heat for regeneration. The remaining elements of the preheater work similarly, each of which has an individual connection to the power source g

through thermoregulator

The placement of the elements of the preheater on the height of the adsorbent layer reduces its heated mass, which leads to a decrease in air consumption for regeneration, and consequently, of electricity. As a result, the volume of dried air entering the consumer increases.

The final number of heaters,

dispersed throughout the volume of the adsorber is determined by economic considerations. Saving energy by increasing the number of heaters should

exceed the cost and installation of heaters in the adsorber.

fto / npfSi / fnffrfo

Claims (1)

LIFTING-DRIVING MECHANISM CONTROL DEVICE, comprising a compressor, an oil separator and a receiver, pneumatically connected in series with each other, and the receiver output is pneumatically connected to the inputs of the adsorbers with thermostatically controlled heaters, and the outputs of the adsorbers are pneumatically connected to the consumer, therefore in order to increase the reliability of the device and its efficiency, temperature-controlled heaters are located uniformly along the height of the adsorber, while their number is selected by nshey total electric power. consumed by temperature-controlled heaters, according to the formula V s r per r ^{r g + k} (Lod-L I, kW., Where ν _{Ρ <} -Γ is the air flow rate for regeneration (m ³ / min), is determined from the equation ® _eg = ^V ₽er R ^S r ^G per ' 60, kJ; K is the number of heaters placed in the layer; With _p - isobaric heat capacity of air, kJ / kg.grad; P is the density of air, kg / m ^e ; I - temperature at the inlet to the regenerator, ° C; ' - air temperature at the outlet of the layer element, ° C; t ₀ - ambient temperature, ° C; (k + 1) - the number of layers is adsorbed. that; <reg ^_ regeneration time, h; Q _per - the amount of heat generated during regeneration. ω s: to GO m m si f