RU76105U1 - STARTING SYSTEM FOR GAS PISTON UNIT MINI-CHP - Google Patents

Abstract

In the proposed solution, when starting the engine, a standard oil pump of the lubrication system is used, and there is no need to install an additional hydropneumatic pressure accumulator, which improves operating conditions. The starting hydraulic pump is used simultaneously as a pump for starting oil pumping, while the overall dimensions of the installation are reduced. The piping system with shutoff valves ensures reliable operation.

Through the use of standard equipment, universalization of the system is achieved. 1 s.p. f-ly, 1 ill.

Description

The solution relates to the field of power engineering - the operation of a mini-combined heat and power plant with reciprocating internal combustion engines and is designed to start a gas piston unit.

A device for facilitating the starting of an internal combustion engine is described, described by RF patent No. 2151906, F02N 17/04, F01M 5/02, publ. 2000.06.27, comprising an oil pump driven by a starting engine, suction and discharge oil lines with an outlet to the oil pan, a switch connecting the discharge and input oil lines, a heat accumulator installed in the suction oil line. Although it is close in design, its function is limited only by pre-bleeding and lubrication.

A known start-up system for a gas-piston unit of a mini-CHP plant, comprising a starter in the form of a gear hydraulic motor having a mechanical connection with the engine crankshaft, an oil supply system for prestarting pumping and engine lubrication, including shut-off valves and pipelines: suction, discharge, return and drain. The engine start-up system consists of a starter - a hydraulic motor and a hydropneumatic pressure accumulator, while the latter uses a sealed reservoir filled with working fluid and air with an elastic membrane between them // Internal combustion engines. In 3 book Prince 2. Dynamics and design / V.N. Lukanin, I.V. Alekseev, M.G. Shatrov and others. - M .: Higher. school, 1995, p. 287. - prototype.

As a hydraulic motor, gear, screw, sliding (vane) and piston (radial and axial) pumps can be used.

At the same time, an additional source of compressed air is required to fill and pump the air cavity of the tank, which leads to an increase in the overall dimensions of the mini-CHP and a decrease in the safety of operation (pneumatic pressure vessels are controlled by Rostekhnadzor).

These shortcomings are eliminated by the proposed solution.

The task at hand is to increase the operational safety of the mini-CHP, reduce injuries to service personnel, improve working conditions and reduce its overall dimensions.

The technical result is the exclusion of the use of compressed air, the use of standard engine equipment for starting, i.e. system universalization.

This technical result is achieved by the fact that in the start-up system of the gas-piston unit of the mini-CHP, containing a starter in the form of a gear hydraulic motor, which is mechanically connected to the engine crankshaft, an oil supply system for prestarting pumping and engine lubrication, including shut-off valves and pipelines: suction, discharge , reverse and drain, a standard engine lubrication pump was used as a starter, and a hydraulic pump was used as a starter drive, a standard pre-launch pump was used as a starter An electric motor mounted on a suction pipe connected to a discharge pipe, a bypass pipe with a shut-off valve is located between the suction and return pipes at the inlet of the hydraulic motor and the hydraulic pump, the outlet of the drain pipe is located in front of the bypass pipe in the hydraulic motor, and the shut-off valves are installed on the return and discharge pipelines, two in series in front of and behind the hydraulic motor with the inclusion of a drain and suction pipe between them, respectively rovodov, and the suction line - for the hydraulic pump and in front of him after the bypass line.

In the proposed solution, when starting the engine using a hydraulic motor - a standard oil pump of the lubrication system, there is no need to install an additional hydropneumatic pressure accumulator, which improves operating conditions, and when using a starting hydraulic pump at the same time as a pre-start oil pump, the overall dimensions of the installation are reduced. The system of connecting pipelines with shutoff valves ensures reliable operation of the system. System universalization is achieved through the use of standard equipment.

The proposed engine starting system is shown in the drawing. It includes a hydraulic motor 1, which is used as a regular gear pump of the engine lubrication system, connected by a mechanical link 2 (system of gears) with the crankshaft of the engine, reverse 3 and pressure 4 pipelines of the lubrication system with shut-off valves 5, 6 and 7 installed sequentially on them, 8, respectively, a hydraulic pump 9, which is used as a regular gear pump for engine oil pre-start pumping, connected by mechanical connection 10 (quick coupler coupling) to the drive electrode drive, the suction pipe 11 for supplying oil from the crankcase to the hydraulic pump 9 with installed

in front of and behind the hydraulic pump 9, shutoff valves 12 and 13, pipeline 14 for draining oil into the crankcase, bypass pipe 15 with a shutoff valve installed 16. Pipeline 11 is connected to pipeline 4 at a point between valves 7 and 8, pipeline 14 is connected to pipeline 3 at a point between valves 5 and 6, pipe 15 is connected to pipe 11 at a point in front of valve 12, and to pipe 3 at a point between hydraulic motor 1 and valve 6.

The engine starting system operates as follows.

During pre-start oil pumping, valves 6, 7 and 16 are closed, the rest are open. The hydraulic pump 9, driven through a mechanical link 10 by a drive motor, supplies oil from the crankcase through a pipe 11 to a pipe 4, while the friction of the idle engine is lubricated. Engine oil is drained through lines 3 and 14 back to the crankcase.

When starting the engine, valves 5, 8 and 16 are closed, the rest are open. The hydraulic pump 9 delivers oil from the crankcase to the hydraulic motor 1, which is then driven into rotation by oil pressure, and through a mechanical connection 2 untwists the crankshaft of the engine and starts the latter, the oil after the hydraulic motor 1 is discharged through line 14 into the crankcase. After start-up, the hydraulic pump 9 is disconnected by a mechanical link 2 from the switch-off motor, the valves 6, 12 and 13 are closed, the remaining valves must be open. Oil from the crankcase through the pipelines 11 and 15 is sucked in by the pump 1, through the pipeline 4 is pumped through the engine lubrication units and drains back to the crankcase through the pipelines 3 and 14.

Checking the technical solution for known sources of information shows that the proposal meets the criterion of "novelty."

Providing a new technical result with a new set of features indicates an inventive step.

Technical analysis indicates the industrial applicability of the system.

Claims (1)

The start-up system of the gas-piston unit of the mini-CHP, containing a starter in the form of a gear hydraulic motor, which is mechanically connected with the engine crankshaft, an oil supply system for prestarting pumping and engine lubrication, including shut-off valves and pipelines: suction, discharge, return and drain, characterized in that a regular engine lubrication system pump was used as a starter, and a hydraulic pump was used to drive the starter, which was used as a standard engine starting pump with electric drive water installed on the suction pipe connected to the discharge pipe, between the suction and return pipes at the inlet of the hydraulic motor and the hydraulic pump there is a bypass pipe with a shut-off valve, the outlet of the drain pipe is located in front of the bypass pipe in the hydraulic motor, and the shut-off valves are installed on the return and discharge pipes two in succession in front of and behind the hydraulic motor with the inclusion of drain and suction pipelines between them, respectively, and on the suction pipe water pipe - behind the hydraulic pump and in front of it after the bypass pipeline exits.