RU204731U1 - AIR PREPARATION UNIT FOR VEHICLE PNEUMATIC SYSTEM - Google Patents

Abstract

The utility model relates to mechanical engineering, namely to structures for drying compressed air inflated by a compressor for a pneumatic brake drive. The air preparation unit of the pneumatic system of the vehicle contains a moisture-oil separator (1), an adsorbent dryer (2) with a built-in pressure regulator, and the adsorbent dryer (2) with a moisture-oil separator (1) is fixed by means of a pipeline (3) through a fitting (4) located on the moisture-oil separator (one). The unit also contains a regeneration receiver (5) and a condensation receiver (6), which are connected to the adsorbent dryer (2) using polyamide pipelines (7) and (8), respectively. On the regeneration receiver (5) and on the condensation receiver (6) in the lower part there is a drain valve (9) to check the presence of moisture condensate. In this case, all the elements of the unit moisture-oil separator (1), adsorbent dryer (2), receiver (5) regeneration and receiver (6) condensation are placed on the rigid frame of the bracket (10), forming a single module, and the bracket (10) is made of several components bolted together. In this case, the moisture-oil separator (1) and the adsorbent desiccant (2) are fixed in the upper part of the bracket frame by means of a bolted connection, and the regeneration receiver (5) and the condensation receiver (6) are fixed in the lower part of the bracket frame by means of a bolted connection. The condensing receiver (6) provides additional collection of moisture contained in the compressed air after the adsorbent dryer (2), thereby increasing the reliability of the entire pneumatic system of the vehicle. In addition, an emergency release valve (11) is installed on one of the outer wall of the bracket (10) by means of a bolted connection, and a tire inflation valve (12) is installed through the fitting on the adsorbent dryer (2). In this case, the frame of the bracket allows, together with all the elements of the block, to fix other units of the vehicle, for example, a coarse fuel filter (13). A technical solution was created that made it possible to increase the reliability of the pneumatic system of the vehicle by improving the quality of compressed air drying. 3 ill.

Description

The utility model relates to mechanical engineering, namely to structures for drying compressed air inflated by a compressor for a pneumatic brake drive.

With an increase in the tonnage of a car, as well as in accordance with the environmental conditions in which they are operated, the requirements for the performance of certain vehicle systems increase. In particular, the requirements for the quality of compressed air drying in pneumatic drives of heavy vehicles are also increasing. In special harsh operating conditions, those elements of the air preparation unit that are included in it may not cope with their functionality. Also, as practice shows, the delay in replacing the filter elements of the air preparation unit and its improper maintenance leads to breakdown and failure of such important vehicle systems as the brake system, automatic transmission, tire inflation system.

There is a known compressed air drying unit containing two alternately operating vertically arranged adsorbers, each of which contains a housing with an inlet and outlet and with a fixed bed of adsorbent placed in the housing, air supply and exhaust pipelines connected to the inlets and outlets of each adsorber, and controlled valves, the body of each adsorber is made of a transparent material, and indicator silica gel is used as an adsorbent (see patent for a useful model RU No. 163643, IPC B01D 53/04 (2006.01), B01J 20/34 (2006.01), F16K 31/02 (2006.01) , published on July 27, 2016).

Known is a compressed air drying unit containing two alternately operating adsorbers, to the inputs and outputs of each of which are connected air supply and exhaust pipelines with pneumatically controlled valves installed on them, where the unit additionally contains an air heater installed after the adsorbers, directed for the regeneration of adsorbers (see patent for utility model RU No. 179036, IPC B01D 53/02 (2006.01), published on 25.04.2018).

Known pneumatic braking system of a vehicle, which contains an air preparation unit with a pressure regulator and a check valve at the outlet, a safety valve with resistance to bypass of compressed air, consisting of bypass valves with resistance to bypass of the service brake circuits and powered through check valves from the service brake circuits, bypass valves with resistance to bypassing the brake accumulator circuit and the consumer circuit, receivers of the service brake circuits, receivers of the energy accumulator circuit and consumer circuit, the brake accumulator control valve, the accelerator valve of the energy accumulators, power accumulators, the supply pipelines of the power accumulator control valve and the accelerating valve, two-section diaphragm brake valve and Invention patent RU No. 21455555, IPC В60Т 13/38 (2000.01), published on 20.02.2000).

Known compressed air dryer, containing a housing with inlet and outlet, the housing is made of metal and is made in the form of a hollow product of an oblong shape, the inlet and outlet of which are located on opposite sides, while the inlet to the housing is made in the form of a connecting fitting, around which a heat-insulating sleeve is located , on the inner side of which a heating cable is laid, transverse metal capacitor plates with holes and cutouts are installed inside the case between the inlet and outlet (see patent for utility model RU No. 179320, IPC B01D 53/26 (2006.01), published on 05/08/2018) ...

It is known a device for mounting receivers, containing lodgments, rigidly connected to each other and attached to the base to the frame, clamps for receivers associated with the lodgments, equipped with a tie resting on the end part of the lodgments, and with a threaded end connected with an interference fit to the frame, and pins attached to the longitudinal edges of the lodgements (see ed. wit. SU No. 1234703, IPC ⁴ F17C 13/08, published on 05/30/86).

These technical solutions do not ensure the reliability of the pneumatic system, since it increases due to the operation of the air dryer itself, in addition, the elements of the pneumatic system, namely the elements of the air preparation unit, are installed in different places of the vehicle system, which leads to a decrease in ergonomics.

It is also known a device for attaching air receivers to a vehicle, comprising two brackets fixed at one end on the frame and projecting outwardly in the transverse direction, a floor panel connected to the lower ends of the brackets, and holes are made in the brackets for which hooks formed on the lower ends of the two bolts for clamping, and on the other end of the bolts there is a thread on which the nut is fixed, and the receivers are supported from below on the floor panel and brackets using U-shaped fasteners (see patent for invention JP No. 3520768, IPC B62D 49 / 00, published 04.19.2004).

The disadvantage of this technical solution lies in the fact that the device is intended specifically for the brake drive circuits, in addition, two receivers, which are attached together with the battery box, are voluminous and are designed to work in the general pneumatic drive system to perform the car braking function, and not for preparation of air and supplying it to the pneumatic drive system.

Also known is an air preparation unit for a KAMAZ car, which contains a moisture-oil separator, an adsorbent dryer with a built-in pressure regulator connecting their pipelines, a receiver and brake valves. (https: // kav 101.ru/dauto/group/50093-blok-podgotovki-vozduha-6460-3511001/).

The disadvantage of this technical solution is that the elements of the unit are installed in different places of the frame, as a result of which the length of the connecting pipelines for their connection increases, which leads to the complexity of maintenance and timely replacement of elements, which, as a result, affects the reliability of the pneumatic system.

The prototype to the claimed technical solution in terms of a set of essential features and the achieved technical result is a pneumatic brake drive of a vehicle, which uses an air preparation unit, which includes a moisture-oil separator connected by a pipeline with an adsorbent desiccant, regeneration receivers, connected through pipelines with an adsorbent desiccant, while the adsorbent dryer has a built-in pressure regulator, while the block elements are all located in different parts of the drive system, connected by pipelines (see utility model patent RU No. 36650, MPK V60T 13/24 (2000.01), V60T 13/38 (2000.01) , published 20.03.2004).

The disadvantage of this technical solution is that compressed air flows from the compressor into the thermodynamic moisture-oil separator, from which it enters the adsorbent dryer, where it undergoes final drying, in addition, with increasing humidity and low temperatures, the air preparation unit cannot cope with drying and removing condensate. which affects the negative operation of the system, and the scatter of all elements affecting the cleaning and drying of compressed air over the chassis, depending on the layout, can play a negative role in the preparation of dry compressed air.

The problem to be solved by the claimed technical solution is to increase the reliability of the pneumatic system of the vehicle by improving the quality of compressed air drying.

The problem is solved by the fact that the air preparation unit for the pneumatic system of the vehicle, containing a moisture-oil separator, an adsorbent dryer with a built-in pressure regulator connected to the moisture-oil separator by a pipeline, a regeneration receiver connected to an adsorbent dryer by means of a polyamide pipeline, the unit additionally contains a condensation receiver connected to an adsorbent polyamide pipeline, while the moisture-oil separator, adsorbent dryer, regeneration receiver and condensation receiver are placed on the rigid frame of the bracket, forming a single module, and the bracket is made of components fixed to each other by a bolted connection, where the moisture-oil separator and the adsorbent dryer are fixed in the upper part of the bracket with the upper part of the bracket using a bolted connection, and the regeneration receiver and condensation receiver - in the lower part of the bracket frame using a bolted connection.

The set of distinctive features, consisting in the fact that the preparation unit additionally contains a condensation receiver connected to the adsorbent dehumidifier by a polyamide pipeline, while the moisture-oil separator, the adsorbent dehumidifier, the regeneration receiver and the condensation receiver are placed on a rigid frame of the bracket, forming a single module, and the bracket parts fixed to each other with a bolted connection, where the moisture-oil separator and the adsorbent dryer are fixed in the upper part of the bracket frame by means of a bolted connection, and the regeneration receiver and condensation receiver - in the lower part of the bracket frame by means of a bolted connection, allows to ensure the reliability of the pneumatic system.

The utility model is illustrated by drawings:

fig. 1 - air preparation unit, general front view (rotated in isometric view);

fig. 2 - the same, general rear view (rotated in isometric view);

fig. 3 - the same, general view assembled with a coarse filter, general front view (rotated in isometric view).

The air preparation unit of the pneumatic system of the vehicle contains a moisture-oil separator 1, an adsorbent dryer 2 with a built-in pressure regulator, and an adsorbent dryer 2 with a moisture-oil separator 1 is fixed by means of a pipeline 3 through a fitting 4 located on a moisture-oil separator 1. The unit also contains a regeneration receiver 5 and a condensing receiver 6 , which are connected to the desiccant dryer 2 using polyamide pipelines 7 and 8, respectively. On the regeneration receiver 5 and on the condensation receiver 6, a drain valve 9 is installed in the lower part to check the presence of moisture condensate. In this case, all the elements of the unit moisture-oil separator 1, adsorbent dehumidifier 2, regeneration receiver 5 and condensation receiver 6 are placed on the rigid frame of the bracket 10, forming a single module, and the bracket 10 is made of several components connected by a bolted connection. In this case, the moisture-oil separator 1 and the adsorbent dehumidifier 2 are fixed in the upper part of the bracket frame using a bolted connection, and the regeneration receiver 5 and the condensing receiver 6 are in the lower part of the bracket frame using a bolted connection.

The condensation receiver 6 provides additional collection of moisture contained in the compressed air after the adsorbent dryer 2, and the regeneration receiver 6 is designed to blow the adsorbent dryer 2 and clean the granulant from impurities and moisture through the atmospheric outlet of the adsorbent dryer. Thus, the use of a condensation receiver 6 is justified by the fact that often the change of the filter element of the adsorbent dryer 2 is untimely, which can lead to damage to the pneumatic drive elements up to their complete failure. Moisture settles in the condensation receiver 6 and the output quality increases, and, consequently, the reliability of the entire pneumatic system of the vehicle increases. There is also an additional opportunity to check the performance of the moisture-oil separator 1 and the adsorbent dryer 2, purification of compressed air, the purpose of which is to prevent moisture and oil from entering the pneumatic system of the car.

In addition, on one of the outer wall of the bracket 10, an emergency release valve 11 is installed by means of a bolted connection, which allows compressed air to be supplied to the accelerating valve and the brake system control valve; the fitting on the adsorbent dryer is equipped with a tire inflation valve 12, which makes it possible to easily connect a return line to it for inflation of tires.

The bracket frame, together with the air preparation unit, is attached to the frame side members using a bolt connection or rivets.

In this case, the frame of the bracket allows, together with the elements of the block, to fix other units of the vehicle, for example, a coarse fuel filter 13.

The air preparation unit works as follows.

The air pumped from the compressor of the pneumatic system through the pipeline connected to it through the nozzle 4 enters the moisture-oil separator 1, where the condensate settles, which is formed as a result of the temperature drop and is discharged into the atmosphere through the relief valve. Then the air through the pipeline 3 enters the adsorbent dryer 2 with a built-in pressure regulator, designed to maintain the working pressure of compressed air in the pneumatic drive system. Also, the adsorbent dryer 2 serves for additional condensate separation and purification of compressed air from oil impurities. Further, the purified air enters simultaneously into the regeneration receiver 5 and into the condensation receiver 6, where moisture is collected. The finally cleaned and dry air enters the pneumatic system of the vehicle through the fitting 14 of the condensing receiver 6. Thus, the introduction of a condensation receiver allows at the final stage to collect the remaining moisture contained in the compressed air after the adsorbent dryer and thereby increase the reliability of the pneumatic system of the vehicle.

There is also an additional opportunity to check the performance of the moisture-oil separator 1 and the adsorbent dryer 2, purification of compressed air, the purpose of which is to prevent moisture and oil from entering the pneumatic system of the car.

In addition, the compact arrangement of the elements of the air preparation unit on one frame, as well as freeing up direct access to the tire inflation valve 12 and the emergency release valve 11, makes it possible to increase the ergonomics of the car, the convenience of their use, to make timely replacement of the filter elements, which has a positive effect on the reliability of operation. the entire pneumatic system.

In this case, if necessary, other vehicle components, for example, a coarse fuel filter 13, can be jointly attached to the bracket frame.

Thus, the proposed technical solution allows to ensure the reliability of the pneumatic system of the vehicle by improving the quality of compressed air drying.

The claimed technical solution meets the requirement of industrial applicability and is possible for implementation on standard technological equipment using previously mastered technologies.

Claims (1)

The air preparation unit of the pneumatic system of the vehicle, containing a moisture-oil separator, an adsorbent dryer with a built-in pressure regulator connected to the moisture-oil separator by a pipeline, a regeneration receiver connected to an adsorbent dryer by means of a polyamide pipeline, characterized in that the unit additionally contains a condensation receiver connected to the adsorbent dryer pipeline , while the moisture-oil separator, adsorbent dehumidifier, regeneration receiver and condensation receiver are placed on the rigid frame of the bracket, forming a single module, and the bracket is made of component parts fixed to each other with a bolt connection, where the moisture-oil separator and adsorbent desiccant are fixed in the upper part of the bracket by means of a bolt connections, and the regeneration receiver and condensation receiver - in the lower part of the bracket frame using a bolted connection.

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