CN214092002U

CN214092002U - Engine oil primary supply device of agricultural diesel engine

Info

Publication number: CN214092002U
Application number: CN202023170580.9U
Authority: CN
Inventors: 李厚贵; 袁玉龙; 贾彪
Original assignee: Suihua Institute Of Agricultural Mechanization Heilongjiang Academy Of Agricultural Mechanical Engineering
Current assignee: Suihua Institute Of Agricultural Mechanization Heilongjiang Academy Of Agricultural Mechanical Engineering
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-08-31
Anticipated expiration: 2030-12-25

Abstract

The utility model discloses an engine oil primary supply device of an agricultural diesel engine, which belongs to the technical field of agricultural machinery, and is characterized in that a set of engine oil primary supply device is connected in parallel in the lubricating system of the original agricultural diesel engine, the main part of the engine oil primary supply device is an engine oil primary supply pump, the lower end of the engine oil primary supply pump extends into the bottom of an oil pan through an oil pipe and an engine oil primary supply pump filter, and the upper end of the engine oil primary supply pump is connected in parallel with the engine oil pump of the original agricultural diesel engine at the oil inlet end of an engine oil rough filter through a one-way valve; the control circuit controls the starting circuit and the engine oil primary pump circuit to work through the normally open type and normally closed type engine oil pressure switch before the agricultural diesel engine is started, so that good lubrication is guaranteed after the diesel engine is stopped, particularly during cold starting after the diesel engine is stopped for a long time, and the service life of the diesel engine is prolonged.

Description

Engine oil primary supply device of agricultural diesel engine

Technical Field

The utility model belongs to the technical field of agricultural machine, concretely relates to machine oil for a while device of agricultural diesel engine.

Background

At present, all agricultural diesel engines are lubricated by oil pumps driven by crankshafts, the oil pumps stop working at the same time after the agricultural diesel engines are shut down, the oil on each lubricated surface flows back to an oil pan uniformly within a certain time, a period of time is required for the oil to reach each lubricated surface of the agricultural diesel engines from the oil pumps when the agricultural diesel engines are started, each lubricated surface is in a severe abrasion state of semi-dry friction or dry friction within the period of time, and researches show that 60-80% of abrasion of the agricultural diesel engines comes from the lubricated surfaces; particularly, agricultural machinery is seasonally operated, the agricultural machinery using the agricultural diesel engine needs to be stopped for a long time when in idle, so that an inorganic oil lubricating film is not arranged on the surface of each lubricating part before restarting, and engine oil can not reach each lubricating surface of the diesel engine in time when restarting, particularly, the viscosity of the engine oil is increased and the flow is poor when starting at low temperature or freezing, so that the engine oil is in a non-lubricating or poor lubricating state when starting, the abrasion is aggravated, the damage to a crankshaft bearing bush and a turbocharger bearing of the agricultural diesel engine is the greatest, and the service life of the agricultural diesel engine and each part is greatly reduced.

Disclosure of Invention

The utility model discloses an to the problem that above-mentioned exists, provide an agricultural diesel engine's machine oil give device for a first time to do not have lubricated or lubricated harmfully lead to dry friction, half dry friction to arouse the problem of violent wearing and tearing when solving original agricultural diesel engine start-up.

The technical scheme of the utility model as follows: an engine oil primary supply device of an agricultural diesel engine comprises an agricultural diesel engine lubricating system and a related circuit system, wherein the agricultural diesel engine lubricating system consists of an oil sump, an engine oil pump strainer, a crankshaft, a main oil duct pressure regulating valve, a main oil duct, a cylinder body and a cylinder cover vertical oil duct, a camshaft, an engine oil pump, a safety valve, an engine oil rough filter bypass valve, an engine oil rough filter, a low-pressure limiting valve, a turbocharger, an engine oil fine filter, an engine oil cooler bypass valve, an engine oil cooler and a piston cooling nozzle oil duct; the engine oil primary supply device is connected in parallel in the lubricating system of the agricultural diesel engine, the main part of the engine oil primary supply device is the engine oil primary supply pump, the lower end of the engine oil primary supply pump extends into the bottom of the oil sump through an oil pipe and the engine oil primary supply pump collecting filter, the upper end of the engine oil primary supply pump is connected in parallel with the engine oil pump of the original agricultural diesel engine at the oil inlet end of the engine oil rough filter through the one-way valve, and the upper end of the engine oil primary supply pump is connected in parallel with the engine oil pressure limiting valve; the control circuit controls the on-off of the starting circuit and the engine oil primary pump circuit through the normally open type and normally closed type engine oil pressure switches.

A relevant circuit system of an engine oil primary supply device of an agricultural diesel engine comprises a storage battery, a fuse, an engine oil pressure gauge, an ignition switch, a starting relay, a starter and relevant circuits; the engine oil primary supply device control circuit is additionally arranged on the basis of the related circuit system and consists of a normally closed engine oil pressure switch, an engine oil primary supply pump relay, an engine oil primary supply pump motor, a normally open engine oil pressure switch and related circuits; one end of a normally closed engine oil pressure switch in the control circuit is connected with a preheating gear H of the ignition switch, and the other end of the normally closed engine oil pressure switch is grounded through an engine oil primary pump relay coil; one end of the normally open type engine oil pressure switch is connected with a starting gear ST of the ignition switch through a starting relay coil, and the other end of the normally open type engine oil pressure switch is grounded; the motor end of the engine oil priming pump is connected with the fuse and the storage battery through the relay contact of the engine oil priming pump, and the other end of the engine oil priming pump is bonded.

The utility model adds a normally open type engine oil pressure switch with a closing value of 49kpa on the original starting control circuit of the agricultural diesel engine to control the on-off of the starting circuit, so as to solve the problem that the driver of the agricultural engine directly starts the engine oil without performing engine oil primary lubrication; the normally closed type oil pressure switch with the cutoff value of 98kpa is connected in series in an oil primary pump control circuit, so that the problems that an oil primary pump motor is ablated and damaged due to overlong working time and electric energy is wasted are solved.

In addition, the machine oil of beating for preventing the oil pump of the agricultural diesel engine after the start-up passes through the pipeline pressure release of machine oil primary feed device, the utility model discloses the outlet end of machine oil primary feed pump has set up the check valve.

Contrast original technique, the beneficial effects of the utility model are that: the utility model discloses under the prerequisite that does not change, does not influence the original structure of agricultural diesel engine lubricating system and function, connect in parallel one set of machine oil for the first time device in original agricultural diesel engine lubricating system. Before starting, a main part of an engine oil primary supply device is communicated with an engine oil primary supply pump through a control circuit, the engine oil primary supply pump supplies oil to a lubricating system of the diesel engine and establishes engine oil pressure for each lubricating surface in advance, so that each lubricating surface is fully lubricated before starting the agricultural diesel engine; meanwhile, the normally open type and normally closed type engine oil pressure switches are adopted to automatically control the on-off of the starting circuit and the engine oil primary supply circuit, the purpose that a forced driver must use the engine oil primary supply pump to perform primary supply lubrication before starting is achieved, and the problems that an electric motor of the engine oil primary supply pump is ablated and damaged due to overlong working time and wastes electric energy are solved. The utility model discloses fundamentally has solved the agricultural diesel engine that the prior art exists and has not lubricated or lubricated badly when starting and lead to dry friction, half dry friction to arouse the problem of violent wearing and tearing.

Drawings

Fig. 1 is a schematic structural diagram of an oil supply device of an agricultural diesel engine provided by the utility model.

Fig. 2 is a schematic circuit diagram of the engine oil primary supply device of the agricultural diesel engine provided by the utility model.

In FIG. 1, the labels: 1-oil bottom shell, 2-oil primary pump strainer, 3-oil pump strainer, 4-oil primary pump, 5-crankshaft, 6-main oil gallery pressure regulating valve, 7-main oil gallery, 8-cylinder block and cylinder cover vertical oil gallery, 9-camshaft, 10-oil primary pump pressure limiting valve, 11-one-way valve, 12-oil pump, 13-safety valve, 14-oil rough filter bypass valve, 15-oil rough filter, 16-low pressure limiting valve, 17-turbocharger, 18-oil fine filter, 19-oil cooler bypass valve, 20-oil cooler through, 31-piston cooling nozzle oil gallery.

In FIG. 2, the notation: 21-storage battery, 22-fuse, 23-normally closed engine oil pressure switch, 24-engine oil priming pump relay, 25-engine oil priming pump motor, 26-engine oil pressure gauge, 27-ignition switch, 28-normally open engine oil pressure switch, 29-start relay and 30-starter.

Detailed Description

The engine oil priming pump 4 of the utility model is of an electric gear type and is driven by a direct current motor through a control circuit, and in order to prevent the engine oil priming pump 4 from overloading, the pump is provided with an engine oil priming pump pressure limiting valve 10; at a speed of 3000 rpm and a nominal voltage of 24 v, the motor 25 can generate 500 w.

The utility model provides an agricultural diesel engine's machine oil is for just device, its embodiment is as follows:

as shown in fig. 1, the prior art lubricating system of the agricultural diesel engine comprises: the oil-gas engine comprises an oil pan 1, an oil pump strainer 3, a crankshaft 5, a main oil gallery pressure regulating valve 6, a main oil gallery 7, a cylinder block and cylinder cover vertical oil gallery 8, a camshaft 9, an oil pump 12, a safety valve 13, an oil coarse filter bypass valve 14, an oil coarse filter 15, a low-pressure limiting valve 16, a turbocharger 17, an oil fine filter 18, an oil cooler bypass valve 19, an oil cooler 20 and a piston cooling nozzle oil gallery 31, which are connected and mounted with each other by taking the main oil gallery 7 as a main line according to the figure 1, wherein the cylinder block and cylinder cover vertical oil gallery 8 mainly supplies oil to an oil injection pump and a gas distribution mechanism on a cylinder cover, and the piston cooling nozzle oil gallery 31 mainly supplies oil to a piston cooling nozzle; on the basis of not damaging the original structure of the agricultural diesel engine, an engine oil primary supply device is connected in parallel in the original lubricating system of the agricultural diesel engine, and comprises an engine oil primary supply pump 4, an engine oil primary supply pump strainer 2, an engine oil primary supply pump pressure limiting valve 10, a one-way valve 11 and related pipelines; the main parts of the engine oil primary supply device are an engine oil primary supply pump 4, the lower end of the engine oil primary supply pump 4 extends into the bottom of an oil pan 1 through an oil pipe and an engine oil primary supply pump filter 2, the upper end of the engine oil primary supply pump 4 is connected with an engine oil pump of an original agricultural diesel engine in parallel at the oil inlet end of an engine oil coarse filter 15 through a one-way valve 11, and the upper end of the engine oil primary supply pump is connected with an engine oil primary supply pump pressure limiting valve 10 in parallel for the purpose of avoiding the overload of the engine oil primary supply pump 4; as shown in fig. 2, the control circuit controls the on-off of the starting circuit and the oil priming circuit through a normally open type oil pressure switch 28 and a normally closed type oil pressure switch 23.

The function of the check valve 11 described in fig. 1 is to prevent the oil pumped by the oil pump 12 of the agricultural diesel engine after starting from being discharged through the line of the oil priming device.

As shown in fig. 2, the related circuit system in the prior art of the agricultural diesel engine includes: the battery 21, the fuse 22, the oil pressure gauge 26, the ignition switch 27, the starting relay 29, the starter 30 and the related circuits are connected through electric wires according to fig. 2; the control circuit of the engine oil primary supply device is added on the basis of the related circuit system of the prior art, and comprises: a normally closed type engine oil pressure switch 23, an engine oil primary pump relay 24, an engine oil primary pump motor 25, a normally open type engine oil pressure switch 28 and related circuits; one end of a normally closed engine oil pressure switch 23 in the control circuit is connected with a preheating gear H of an ignition switch 27, and the other end of the normally closed engine oil pressure switch is bonded through a coil of an engine oil primary pump relay 24; one end of the normally open type engine oil pressure switch 28 is connected with a starting gear ST of the ignition switch 27 through a coil of the starting relay 29, and the other end is grounded; one end of an engine oil priming pump motor (25) is connected with the fuse (22) and the storage battery (21) through a contact of an engine oil priming pump relay (24), and the other end is grounded.

The utility model discloses a working process and principle: as shown in fig. 2, before starting the agricultural diesel engine, the ignition switch 27 is screwed to the preheating gear H, the current of the control circuit reaches the coil of the oil primary feed pump relay 24 through the ignition switch 27 and the normally closed oil pressure switch 23 by the storage battery 21 and the fuse 22, the contact of the relay 24 is closed, and the oil primary feed pump motor 25 starts to work, as shown in fig. 1, the oil primary feed pump 4 starts to suck the oil from the oil pan 1 through the oil pipe and the oil primary feed pump filter 2, then the pressurized oil is sent to the oil inlet end of the oil coarse filter 15 through the check valve 11, and finally reaches each lubricating surface of the agricultural diesel engine, so that the problem of no lubrication or poor lubrication during cold starting of the agricultural diesel engine in the prior art is solved; as shown in fig. 2, when the engine oil priming pressure of the agricultural diesel engine reaches 49kpa, the normally open engine oil pressure switch 28 senses that the oil pressure is automatically closed, and a starting circuit is switched on, so that the purpose that a driver must perform priming lubrication by using the engine oil priming pump 4 before starting is realized; when the engine oil pressure of the agricultural diesel engine reaches 98kpa, the normally closed engine oil pressure switch 23 senses that the oil pressure is automatically cut off, and the engine oil primary pump motor 25 stops working, so that the problems of ablation damage and electric energy waste of the engine oil primary pump motor 25 due to overlong working time are solved.

When the agricultural diesel engine starts to rotate after the starting circuit is connected, as shown in fig. 1, the engine oil pump 12 is driven by the crankshaft gear to generate suction force, the engine oil reaches the engine oil coarse cleaner 15 through the engine oil collecting filter 3 through the pipeline of the engine oil cooler 20 and then reaches the main oil gallery 7, and the engine oil is distributed to all lubricating surfaces through the main oil gallery 7. The functions of the oil strainer bypass valve 14 and the oil cooler bypass valve 19 are: when the front-back pressure difference of the engine oil rough filter 15 and the engine oil cooler 20 exceeds a certain value, part of the engine oil passes through the engine oil rough filter and the engine oil cooler and directly enters the rear-end oil passage through the bypass valve; the oil pressure of the lubricating system is adjusted through a main oil gallery pressure regulating valve 6, and a safety valve 13 is mainly used for preventing the oil pump 12 from overloading; the fine oil filter 18 and the coarse oil filter 15 are connected in parallel in the lubricating oil circuit, and 10% of the oil entering the lubricating system is filtered by the fine oil filter 18 through the low-pressure limiting valve 16 and then returns to the oil pan 1. After the agricultural diesel engine is started, the agricultural diesel engine enters a normal working state, the ignition switch 27 returns to an ON gear, and starting and initial lubrication are finished.

The utility model discloses it is effective to accord with agricultural machine's reality, control are simple, practical, but wide application is on using agricultural diesel engine's agricultural machine.

Claims

1. The utility model provides an agricultural diesel engine's machine oil is device for first time, include by oil pan (1), oil pump strainer (3), bent axle (5), main oil gallery pressure-regulating valve (6), main oil gallery (7), cylinder block and cylinder head vertical oil duct (8), camshaft (9), oil pump (12), relief valve (13), machine oil coarse filter bypass valve (14), machine oil coarse filter (15), low pressure limit valve (16), turbo charger (17), machine oil fine filter (18), machine oil cooler bypass valve (19), machine oil cooler (20) and lead to agricultural diesel engine lubricating system and relevant circuit system that piston cooling nozzle oil duct (31) constitute, its characterized in that: the lubricating system also comprises an engine oil primary supply device and a control circuit, wherein the engine oil primary supply device consists of an engine oil primary supply pump (4), an engine oil primary supply pump strainer (2), an engine oil primary supply pump pressure limiting valve (10), a one-way valve (11) and related pipelines, the engine oil primary supply device is connected in parallel in the lubricating system of the agricultural diesel engine, the main part of the lubricating system is the engine oil primary supply pump (4), the lower end of the engine oil primary supply pump (4) extends into the bottom of the oil sump (1) through an oil pipe and the engine oil primary supply pump strainer (2), the upper end of the engine oil primary supply pump is connected in parallel with an oil pump (12) of the original agricultural diesel engine at the oil inlet end of the engine oil rough filter (15) through the one-way valve (11), and the upper end of the engine oil primary supply pump pressure limiting valve (10) is connected in parallel; the control circuit controls the on-off of the starting circuit and the engine oil primary pump circuit through a normally open type engine oil pressure switch (28) and a normally closed type engine oil pressure switch (23).

2. The oil supply device of the agricultural diesel engine according to claim 1, wherein the related circuit system comprises a storage battery (21), a fuse (22), an oil pressure gauge (26), an ignition switch (27), a starting relay (29), a starter (30) and related circuits, and further comprises an oil supply device control circuit which is additionally arranged on the basis of the related circuit system and consists of a normally closed oil pressure switch (23), an oil supply pump relay (24), an oil supply pump motor (25), a normally open oil pressure switch (28) and related circuits, wherein one end of the normally closed oil pressure switch (23) in the control circuit is connected with a preheating gear H of the ignition switch (27), and the other end of the normally closed oil pressure switch is connected with a coil of the oil supply pump relay (24); one end of a normally open type engine oil pressure switch (28) is connected with a starting gear ST of an ignition switch (27) through a coil of a starting relay (29), and the other end of the normally open type engine oil pressure switch is connected with a grounding; one end of an engine oil priming pump motor (25) is connected with the fuse (22) and the storage battery (21) through a contact of an engine oil priming pump relay (24), and the other end is grounded.