The flow of fluid

 

(57) Abstract:

Usage: refrigeration appliances, in particular in devices for maintaining fluid flow through the object with a variable hydraulic resistance. The inventive regulator includes a housing 8 made in the form of thin-walled shells. Inside are hollow rod 7 connected to the housing by means of a spring 5 and pins 6 having a needle valve 9 and the seat 11. The inner surface of the rod 7 and the inner surface of the housing 8 is formed an axial grooved channel, and the housing is located inside the pipeline 1 in his section. 1 C. p. F.-ly, 1 Il.

The invention relates to refrigeration, and controls the flow of liquid or gas passing through the heat exchangers, mainly refrigeration equipment and systems.

In the chambers of the cooling and freezing refrigerators installed coolers connected in parallel to the collector supply of liquid ammonia and removal of vapors of ammonia or ammonia vapor-liquid mixture. Due to a complex of factors (different configurations of channels, different thermal loads, and so on), the liquid refrigerant may not be distributed evenly across all of vzducholod what ozdoravlivleniem put or throttle washer or valve. These funds have little effect on the uniformity of ammonia, as in the process change the load on each cooler in its own way. So you want an automatic device that provides a constant fluid flow through each device when changing the characteristics of the latter in the process, or significantly 10-20-fold increase in the rate of circulation of the ammonia through the heat exchanger by a pump. Thus, throttle washer and valve are analogous to control fluid flow respectively constant and adjust manually. Their main disadvantage is the complexity and the complexity of control the distribution of liquid ammonia in the air.

This disadvantage is not present in known regulator of fluid flow, comprising a housing with a device for fastening in the context of the pipeline inside the casing are with valve stem, saddle and spring, and the outer surface of the rod and the inner surface of the housing to form a channel. This regulator is used to regulate the flow of cooling water through the condenser. The signal serves as the condensing pressure of the refrigerant vapor. However, this control is not applicable for poderia food as pressure in the reservoir connected to the coolers, are maintained constant. The specified control fluid flow is the closest analogue of the device and is taken as a prototype.

The aim of the invention is the provision of automated maintenance of a constancy of flow of liquid refrigerant through connected in series with the regulator heat exchanger when changing the hydraulic resistance of the device in the process.

Comparative analysis with the prototype shows that the proposed control fluid flow differs in that the controller is equipped with pins, which are spring, the rod is made hollow and is connected to the casing using studs and the body is made in the form of thin shells, the valve has a needle placed in the saddle, which is installed in the end of the channel along the flow, and the mounting device is a flange, on which a connector of a cantilever housing-side shaft, and the channel is axial and calibrated that the housing is located inside the pipe, and the connector is made in the form of a threaded connection.

Thus, the proposed control fluid flow from the>The study of other technical solutions, for example, means increasing the frequency of the circulation pump circulation cooling systems found that they do not provide a reliable constant refrigerant mass flow through the cooler in comparison with the proposed device, reduce the reliability of the whole system and lead to increased consumption of electricity to drive circulation pumps.

The drawing shows the flow of the fluid section.

The flow of fluid is installed in the section of the pipeline 1 with flanges and consists of a flange 2 control fluid flow, threaded connection 3 of the flange 2 with the housing 8, the studs 4, springs 5, the studs 6, the hollow shaft 7, the housing of the regulator in the form of thin shell 8, the cylindrical part of the valve 9, the valve of variable cross-section (needle) 10 and seat 11.

The needle 10 may be made conical or other special profile (parabolic composed of different cones, in the form of a body of rotation or square, multi-faceted, and so on ) depending on the operating modes over temperature, costs and types of liquid (single phase, multiphase, water, ammonia, oil, oil mixture and ammonia and so on ).

The controller operates as follows. When the flow of liquid in the calibrated channel between the housing 8 and the shaft 7 under the action of viscous forces the rod 7 is moved in the direction of the fluid. The rod 7 is also affected by the pressure drop in the pipe 1 before and after the regulator. The rod 7 with the valve 9 and the needle 10 in the equilibrium state is retained by the spring 5. When increasing the liquid flow rate through the regulator (decreased hydraulic resistance of the cooler), viscous forces and pressure drop are promoting the valve 9 with the needle 10 to the fluid flow and increase the hydraulic resistance of the regulator on the numerical value falling in the cooler.

When increasing the hydraulic resistance of the air cooler, for example, with increasing heat load on the cooler, at first decreases the fluid flow, and then it is restored by reducing the hydraulic resistance of the flow (change the position of the rod 7 with the needle 10 relative to the seat 11).

The prototype nasty.

Console mount housing 8 of the regulator on the flange 2 allows the same flange mounted regulators, designed to maintain different nominal flow, i.e. to unify mount controls fluid flow.

Cantilever mounting of the flow regulator allows you to ensure reliable operation of the regulator and bending of the pipeline after 1 flange 2 within the gap between the valve seat 11 (or the end of the needle 10 and the inner surface of the pipeline 1. In addition, facilitated maintenance of the regulator because of the availability for inspection of the main working parts - seat, needle, rod, spring.

Performance and reliability regulator tested in experiments with water. Proven its ability to maintain constant water flow when changing the hydraulic resistance of the air cooler at 2.5 kg/sq., see (56) Uman C. C. automation of refrigeration units. M : Food industry, 1973, S. 171, Fig. 110A.

1. The FLOW of FLUID, comprising a housing with a device for fastening in the context of the pipeline inside the casing are with valve stem, saddle and spring, and the outer surface of the rod and the inner surface the stem are hollow and connected to the housing by means of springs and pins, and the body is made in the form of thin shells, the valve has a needle placed in the saddle, which is installed in the end of the channel along the flow, and the mounting device is a flange, on which a connector of a cantilever housing-side shaft, and the channel is axial and calibrated.

2. The regulator under item 1, characterized in that the housing is located inside the pipe, and the connector is made in the form of a threaded connection.

 

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