RU210819U1 - Oil pump of internal combustion engine - Google Patents

Abstract

Given that not all internal combustion engines after assembly, especially during repairs, oil pumps provide the necessary pressure, it becomes necessary to increase the performance of these pumps. An internal combustion engine oil pump is proposed, consisting of a split housing 12, 13 with wells for the drive and driven gears, the drive shaft, the axis of the driven gears, as well as placed in the wells of the leading 15, 17 and driven 16, 18 gears, made with the possibility of creating pressure and oil flow in the lubrication system due to the drive from the crankshaft. The wells of the driving 17 and driven 18 gears of the discharge section of the body 12 are deepened by 3 mm, and segments 19, 20 of gears 3 mm thick are additionally attached to the driving 17 and driven gears 18, cut off from the corresponding gears of the repair fund and machined by grinding from the side of the cut. the model makes it possible to increase the performance of oil pumps by modifying the existing design by processing the discharge section housing to the repair size and installing a set of repair parts. oil pump repair.

Description

FIELD OF TECHNOLOGY

The utility model relates to the field of mechanical engineering for the production of automobile and specialized vehicles, as well as the operation of such complex high-tech equipment as cars, transport, transport and technological machines and complexes (TTMiK), including agricultural, construction, road, loading and unloading machines and special machines. An important condition is the reduction of maintenance, repair and operation costs, achieved by improving the reliability of vehicles and TTMiK. The proposed device meets the condition of industrial applicability and the needs of ongoing research and development work in improving existing machines and designing new ones, as well as in the production and repair of engines in motor transport enterprises and car repair plants.

BACKGROUND OF THE INVENTION

The utility model is aimed at increasing the assigned engine life, preventing accidents by means of design and technological improvements based on research at the stage of product development in production. Manufacturers research and improve the design of internal combustion engines and its systems, improve production quality, ensure the reliability and service life of engines and their mechanisms and systems throughout the entire life cycle.

BACKGROUND TO CREATING A UTILITY MODEL

Reliable operation of parts and systems of an internal combustion engine (hereinafter - ICE) is achieved, among other things, by organizing the supply of oil to them. The connecting rod bearings are the furthest away from the oil pump. Oil flows to them through the main bearings and channels of the rotating crankshaft.

During operation, due to wear of the internal combustion engine, due to a decrease in pressure in the lubrication system, critical conditions arise in which the connecting rod bearings experience oil starvation due to a break in the flow in the supply channels.

Based on the analysis of oil pressure losses to the connecting rod bearings during engine wear, in order to ensure a constant oil flow to the connecting rod bearings and its continuity, it is necessary to constantly maintain an excess oil pressure in the lubrication system of at least 0.2 MPa, for example, by increasing the performance of the oil pump.

Maintaining the pressure in the lubrication system within the specified limits is possible by increasing the productivity of the oil pump, as well as by selecting the oil viscosity [1].

Given that not all internal combustion engines after assembly, especially during repairs, oil pumps provide the necessary pressure, there is a need to increase the performance of these pumps.

The lubrication system of the KAMAZ diesel engine is combined, with a "wet" sump (Fig. 1) [2] and includes: an oil pump (3), an oil sump (1), an oil filter (consisting of a full-flow (4) and a partial-flow ( 9) filter elements), oil-water heat exchanger (7), oil channels in the block and cylinder heads, front cover and flywheel housing, external oil lines, oil filler neck, valves (2, 5, 6, 10) to ensure the normal operation of the oil system and control devices (eight).

From the crankcase, through the oil receiver, oil enters the delivery and radiator sections of the oil pump; then it is fed into the oil filter, where it is cleaned by two filter elements, then it enters the main line, from where it is directed through the channels in the block and cylinder heads to the main and connecting rod bearings of the crankshaft (11), rocker arm bushings and upper tips of the pusher rods.

The oil pump is a separate unit installed on the platform of the stand or cylinder block, driven by a gear from the drive gear of the stand or the crankshaft. Inside the oil pump housing there are rocking gears that create pressure and a certain oil flow, and which supply oil to the main engine oil line, safety valve and lubrication system valve.

PATENT DOCUMENTS

As an analogue, you can bring a two-section pump (Patent No. 2633727 IPC F04C2 / 08 (2006.01), F04C11 / 00 (2006.01) [3]), containing two sections, each of which consists of a housing in which the driving and driven gears are located, the drive and driven rollers supported by rolling bearings, and an intermediate plate separating one pump section from another. The exclusion of axial movement of the drive shaft along the axis is provided by retaining rings installed in the grooves of the drive shaft located on opposite sides of one of the drive gears.

The disadvantage of the design is the impossibility, if necessary, to increase performance after assembly, especially when repairing the oil pump

In the analogue according to [4], one can cite the thickening of the crankshaft bearing shells in the internal combustion engine as these bearings wear out in operation. Inserts with an increased thickness of 0.05 mm are installed without regrinding the crankshaft journals, due to which there is a decrease in oil consumption through them and an increase in pressure in the lubrication system.

The proposed utility model makes it possible to prevent the occurrence of emergency failures by creating an oil pump device with increased productivity.

A remanufactured connecting rod [4] is considered as a prototype of an oil pump with increased productivity; if the hole of the lower head is worn more than the allowable size, the connecting rod and cap joint plane is milled by 0.25 mm, followed by boring. A piston with a bottom cut is also used to avoid possible contact between it and the cylinder head (the clearance between the piston and the cylinder head after tightening the bolts of its fastening should be more than 0.87 mm).

In the proposed device, the wells were deepened under the drive and driven gears of the discharge section of the oil pump housing to a depth of 3 mm by milling the surface of the bottom A (figure 2), with installation on the drive shaft and the axis of the driven gears of the segments, respectively, of the drive and driven gears of the injection section with a height of 3 mm (figure 3). The depth of milling is chosen from the conditions of the residual thickness and strength of the body, as well as sufficient to increase productivity. In this case, the segments of the driving and driven gears are made from the corresponding gears of the oil pump rejected during troubleshooting.

The technical result of the proposed device is to increase the performance of the oil pump by increasing the length of the working surface of the teeth of the rocking gears while maintaining the overall and landing dimensions of the oil pump.

According to the utility model, an oil pump for an internal combustion engine is proposed, consisting of a split housing with wells for the drive and driven gears, a drive shaft, an axle of the driven gears, and also placed in the wells of the drive and driven gears, made with the possibility of creating pressure and oil flow in the lubrication system due to the drive from the crankshaft, while the wells of the drive and driven gears of the discharge section of the housing are deepened by 3 mm, and the drive and driven gears are additionally attached to the segments of gears with a thickness of 3 mm, cut off from the corresponding gears of the repair fund and processed by grinding from the side of the cut.

BRIEF DESCRIPTION OF THE DRAWINGS AND OTHER MATERIALS

The essence of the utility model is illustrated by drawings and diagrams:

Fig.1 Scheme of the lubrication system of the KAMAZ engine [2];

Fig.2 The housing of the discharge section of the oil pump;

Fig.3 Oil pump of increased productivity.

POSITIONS ON THE SCHEMES

Table 1

Position Designation one oil crankcase 2 lubrication system valve 3 oil pump 4 full flow filter element 5 thermal valve 6 bypass valve 7 water-oil heat exchanger eight control devices nine partial flow filter element ten safety valve eleven oil supply to main and connecting rod journals BUT milled surface of the discharge section of the oil pump housing 12 oil pump delivery housing thirteen oil pump radiator housing fourteen oil pump spacer fifteen Radiator section drive gear sixteen gear driven radiator section 17 drive gear of the discharge section eighteen driven gear of the discharge section nineteen discharge section drive gear segment 20 driven gear segment of the discharge section

INFORMATION SOURCES

1. Dzherikhov V.B. Automotive operating materials: textbook. allowance. Part II., Oils and lubricants / V.B. Dzherikhov; St. Petersburg: St. Petersburg State University. architect.-builds. un-t, 2009. - 256 p. (55 pp.).

2. Operation manuals. KamAZ engines: 740.19-200, 740.58-300, 740.14-300, 740.19-3902002RE. Naberezhnye Chelny: OJSC KamAZ, 2006. -107 p. (25 pp.).

3. Patent 202696 Russian Federation, IPC G01L 7/00 (2006.01). A device for measuring oil pressure in the channels of lubrication systems for engines, machines and their units. Kulakov A.T., Shchigartsov I.M., Barylnikova E.P., Kulakov O.A. - 2020105115, dec. 03/02/2020; publ. 03/03/2021, bul. No. 7.

4. Kulakov A.T., Denisov A.S., Makushin A.A. Features of the design, operation, maintenance and repair of power units of trucks: Textbook. – M.: Infra-Engineering, 2013. – 448 p.

Claims (1)

Oil pump of an internal combustion engine, consisting of a split housing with wells for the drive and driven gears, a drive shaft, an axle of the driven gears, and also located in the wells of the driving and driven gears, made with the possibility of creating pressure and oil flow in the lubrication system due to the drive from crankshaft, characterized in that the wells of the drive and driven gears of the discharge section of the housing are deepened by 3 mm, and the drive and driven gears are additionally fitted with segments of gears 3 mm thick, cut off from the corresponding gears of the repair fund and machined by grinding from the side of the cut.

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