RU2307955C1 - Oil system float chamber of natural gas charger - Google Patents

Abstract

FIELD: mechanical engineering; turbines and compressors.

SUBSTANCE: invention can be used in sealing systems of natural gas chargers. Proposed float chamber of oil system of natural gas charger contains housing with intake and outlet branch pipes and lever with float arranged in housing and connected with shutoff member made in form of spool installed on outlet branch pipe with valve interacting with float through strip of lever and spring-loaded in direction of opening. According to invention, float chamber is furnished with mechanism for independent lifting of float. Said mechanism for independent lifting of float in float chamber can be made in form of cam mounted on axle arranged parallel to axle of float turning and provided with elements for coupling with drive. Use of mechanism for independent lifting of float in float chamber of charger improves reliability in operation.

EFFECT: improved reliability in operation.

2 cl, 3 dwg

Description

The invention relates to turbocompressor engineering, and in particular to devices for sealing systems of rotors of natural gas blowers.

Known float chamber of the oil system of a natural gas supercharger, comprising a housing with inlet and outlet nozzles, a lever with a float disposed in it, connected to a shut-off element made in the form of a spool mounted on the outlet nozzle with a valve interacting with the float through the lever bar and spring-loaded opening side (AS No. 1345004, z. No. 4030458 / 25-08, publ. 15.10.87) - the invention is selected as a prototype.

When the camera is in steady state, the oil flow rate through the hole in the shut-off element is constant. There are no movements of the spool with the float. Around the spool appears a plaque from the products of the interaction of natural gas with oil, which makes it difficult to move the spool, resulting in an increase in the oil level in the float chamber, which leads to the release of oil through the gas outlet pipe. This factor reduces the reliability of the float chamber.

An object of the invention is to eliminate this drawback, namely improving the reliability of the float chamber.

The technical result is achieved in that in the float chamber of the oil system of the natural gas supercharger, comprising a housing with inlet and outlet nozzles and a lever with a float located therein, connected to a shut-off element made in the form of a spool mounted on the outlet nozzle with a valve interacting with the float according to the invention, the float chamber is equipped with a mechanism for independently lifting the float.

In this case, the mechanism for autonomous lifting of the float can be made in the form of a cam mounted on an axis located parallel to the axis of rotation of the float and having elements for communication with the drive.

Figure 1 presents a General view of the float chamber in longitudinal section.

Figure 2 presents a cross section aa of the camera.

Figure 3 presents the remote element B with a spool.

The float chamber of the oil system of the natural gas supercharger on its housing 1 has a cover 2 with a stand 3 and a seat 4. On the axis 5 in the stand 3, a lever 6 with a float 7 is installed, a slider 8 is fixed on the lever 6 with screws 9 connected to a locking element made in in the form of a spool 10, blocking the hole 11 in the seat 4. A spring 12 is fixed on the cover 2, partially balancing the weight of the float 7. At the end of the outlet pipe 13 there is a ball valve 14, spring-loaded in the opening direction by spring 15 and equipped with a pusher 16, which can be installed with Tew interaction with the lever 6 via a bracket 17 at low pressure in the cavity of the float chamber.

For the supply of gas contaminated oil into the chamber has an inlet pipe 18. The pipe 19 is used to exhaust gas. A cam 20 is placed in the housing 1 of the float chamber, the end of which is in contact with the float 7. The cam 20 is mounted on an axis 21, a shoulder 22 is mounted outside the housing 1 on the same axis 21. The axis 21 is mounted in the housing 1 with a seal 23.

To monitor the oil level in the float chamber is a water meter tube 24.

The installation of the float chamber near the supercharger is carried out by two brackets 25.

The camera operates as follows. When oil and gas are supplied under pressure through the inlet pipe 18 into the chamber cavity, the ball valve 14 is closed from the differential pressure. As the oil level rises, the float 7 pops up, by means of the lever 6 and the slider 8 fixed on it, displaces the flat spool 10. This opens (partially) the hole 11 in the seat 4, the oil drains into the outlet pipe 13. The bar 17 moves away from the pusher 16, the spring 15 unable to open the ball valve 14, which is closed from the pressure drop in the chamber, the oil consumption is minimal, since only the spool 10 with the seat 4 is involved. The oil level is reduced, the float 7 is lowered, the spring 12 is pulled, the slider 8 moves the spool 10, cat the second one closes the hole 11, the bar 17 abuts against the pusher 16, compresses the spring 15.

At low pressure in the float chamber, which happens at the starting conditions of the supercharger, and the oil level rises, which means that the float 7 together with the spool 10, the spring 15 also opens the ball valve 14.

At small pressure drops, both valves are involved in the oil drain, which ensures the required flow rate with a small bore in the seat under the spool.

With a decrease in oil level, lack of pressure, the ball valve 14 is closed by a float 7 through the strap 17 and the pusher 16, which eliminates the possibility of a breakthrough of the gas filling the supercharger.

During long-term operation in the steady state, the resulting plaque from the products of the interaction of natural gas with oil on the surface of the saddle 4 is removed by forced temporary lifting of the float 7, displacement of the spool 10.

Pressing on the shoulder 22 with the cam 20, the float 7 is shifted, increasing the hole 11, which increases oil consumption and reduces the level, providing free movement of the spool 10.

This ensures a check of the mobility of the locking element (spool + seat), sticking of the spool is eliminated, oil is eliminated in the gas outlet pipe, and the reliability of the float chamber is increased.

Claims (2)

1. The float chamber of the oil system of the natural gas supercharger, comprising a housing with an inlet and outlet nozzles and a lever with a float disposed therein, connected to a shut-off element made in the form of a spool mounted on the outlet nozzle with a valve interacting with the float through the lever bar, and spring-loaded towards the opening, characterized in that the float chamber is equipped with a mechanism for autonomous lifting of the float. 2. The float chamber according to claim 1, characterized in that in it the mechanism for independently lifting the float is made in the form of a cam mounted on an axis located parallel to the axis of rotation of the float and having elements for communication with the drive.

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