RU192187U1 - DEVICE FOR SELF-REGULATED AIR SUPPLY AT APPLICATION OF THE GAS-DYNAMIC REGULATOR IN THE MECHANICAL VENTILATION SYSTEM - Google Patents

Abstract

The utility model relates to the field of mechanical ventilation of forced type, namely, devices for automatic control of air flow. The purpose of the utility model is to automatically control the air flow during operation of the mechanical ventilation network through the use of a self-adjusting gas flow regulator of gas-dynamic type. Self-regulating mechanical ventilation network with automatic control the air flow rate includes an external air intake device, a fan, an air self-adjusting gas flow type regulators, the principle of which is based on the characteristics of the distribution of air flows in the tee, are used instead of existing devices and methods for regulating the air flow in the main and in branches of the duct network. providing automatic regulation of air flow.

Description

The model of the device relates to the field of mechanical ventilation of forced type, namely, devices for automatic control of air flow.

The purpose of the proposed utility model is to automatically control the air flow during the operation of the mechanical ventilation network through the use of a self-adjusting gas flow type air flow regulator.

Manual configuration of devices for controlling the flow rate of the supplied air into the main branch of the ventilation network requires the participation of qualified specialists and appropriate tooling.

Automatic control implies the installation of additional automation elements (servos, flow sensors, automation system).

Of the above setup methods, in the first case, organizational problems arise, and in the second case, significant capital investments are required.

Therefore, in place of existing devices and methods for regulating air flow, a self-adjusting gas flow type air flow regulator is proposed, the principle of which is based on the characteristics of the distribution of air flows in the tee.

The essence of the invention: during the operation of the ventilation network there is a need to control the amount of air supplied in the room. The schematic diagram of the air supply to the premises is shown in figure 1. The schematic diagram contains: 1 - a device for intake of outdoor air; 2 - fan; 3 - air distributor; 4 - served premises; 5 - a device for controlling the flow rate of the supplied air; 6 - tee; 7 - trunk branch; 8 - branch. In this case, devices are used, the adjustment of which is done manually or by automatic regulation [1].

A self-adjusting gas flow regulator of gas-dynamic type, the circuit diagram of which is shown in Figures 2, 3 and 4. Depending on the magnitude and direction of the resulting aerodynamic moment created by the air flow, the angle of rotation of the axis 10 with the clutch changes and thereby automatically adjusts the air flow.

A fragment of an air duct with a self-adjusting gas-dynamic air flow regulator is shown in Figure 5, and the design of the device is shown in Figure 6. In the tee - 23 on the axis - 25 are firmly seated: plate - 26, impeller - 27 and transmission clutch - 24. Axis - 25 is fixed to 2 sliding bearings - 23, which are located in the wall of the tee - 1 and in the branch of the tee 28.

The claimed effect of the self-adjusting gas-dynamic air flow controller is as follows.

According to the scheme of air movement (see figure 2,3,4 and 6), the air flow, acting on the plate-26, creates a torque M1 relative to the axis - 25 equal

- коэффициент аэродинамической формы пластины;

- радиус пластины;

- плотность воздуха;

- осевая скорость потока в стволе тройника;

- угол поворота пластины на оси.Where

- coefficient of aerodynamic shape of the plate;

- radius of the plate;

- air density;

- axial flow rate in the tee barrel;

- the angle of rotation of the plate on the axis.

, создаваемого крыльчаткой -27 на оси, равна:The rotational component of the flow moment of momentum -

created by the impeller -27 on the axis is:

плотность воздуха;

- вращательная составляющая скорости потока, создаваемая потоком в ответвлении тройника при осевой скорости V3.where R is the radius of the channel; r is the current radius;

air density

is the rotational component of the flow velocity created by the flow in the tee branch at axial speed V3.

When the air moves in the tee, the impeller -27 and the plate -26, rigidly set on the axis -25, create oppositely directed torques M1 and M2.

If the torques M1 and M2 are equal, the axis with the transmission clutch -24 will be in a stationary position. Changing the relationship between the torques will cause the -25 axis to rotate with the -24 gearbox to the side with high torque. By turning the transfer clutch, you can adjust the air flow in other parts of the serviced ventilation network or in another system by either directly turning the throttle valve or by changing the magnitude of the electrical signal on the servo drive of the control device.

This design allows you to replace the more complex and expensive automatic control systems of ventilation systems with sensors, etc.

Depending on the magnitude and direction of the resulting moment, the angle of rotation of the axis -25 changes with the transfer clutch -24 and allows you to create a control signal to regulate the ventilation system.

The experimental setup shown in figure 7, successfully passed the test and confirmed its performance.

Literature

1. Blumenkrants B.A. and other reference book of the installer. Installation of ventilation systems / under. ed. Staroverova I.G. Vol. 3, revised. - M.: Stroyizdat, 19778.- 591s.

Claims (1)

A self-regulating mechanical ventilation network with a gas-dynamic type air flow regulator, comprising a device for intake of external air, a fan, air distributors, air-supply flow control devices, tees, a main branch, characterized in that it has a self-adjusting gas-dynamic type air flow regulator, depending on the size and the direction of the resulting aerodynamic moment of change of the angle of rotation of the axis with the transmission clutch and allow s generate a control signal for adjusting the ventilation system is structurally self-adjusting air flow regulator is a vent tee circular cross section, wherein the rotating axis is set free with a transfer clutch plate fixedly planted on the axis in a transit flow and impeller on a branch.

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