CN108590805B

CN108590805B - Engine lubricating system, oil supplementing method and assembly method thereof, and engine

Info

Publication number: CN108590805B
Application number: CN201810280226.XA
Authority: CN
Inventors: 张洪战
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2018-03-29
Filing date: 2018-03-29
Publication date: 2020-02-21
Anticipated expiration: 2038-03-29
Also published as: CN108590805A

Abstract

The embodiment of the application provides an engine lubricating system and an oil supplementing and assembling method thereof, and an engine, and relates to the technical field of communication equipment, the engine lubricating system comprises a crankcase, an auxiliary oil tank, a cold oil pipe, a hot oil pipe and an air pressure balance pipe, wherein an oil pan for containing engine oil is formed at the lower part of the crankcase, a first port of the cold oil pipe is communicated with the auxiliary oil tank, a second port of the cold oil pipe is communicated with the oil pan, a first port of the hot oil pipe is communicated with the oil pan, a second port of the hot oil pipe is communicated with the auxiliary oil tank, a first port of the cold oil pipe is lower than a second port of the hot oil pipe, the oil level in the oil pan is higher than the second port of the cold oil pipe and the first port of the hot oil pipe, the oil level in the auxiliary oil tank is higher than the first port of the cold oil pipe and the second port of the hot oil pipe, for balancing the gas pressure between the crankcase and the auxiliary tank.

Description

Engine lubricating system, oil supplementing method and assembly method thereof, and engine

Technical Field

The application relates to the technical field of communication equipment, in particular to an engine lubricating system, an oil supplementing method and an assembling method thereof and an engine.

Background

Since a considerable part of the communication base stations are located in remote areas, traffic is inconvenient and the cost of entering stations is high. Prolonging the maintenance interval and reducing the operation cost of the client are one of the main competitive forces of the communication base station. The generator set for providing electric energy for the communication base station is a main object of maintenance, an engine in the generator set is a main power component, and items requiring regular maintenance of the engine are as follows: engine oil, oil filter, air cleaner, diesel oil filter, coolant, fan, belt etc. above project all can influence the maintenance interval of generating set. The engine oil is arranged in an oil pan of the engine, lubrication is provided for the engine, the maintenance period of the engine oil and the engine oil filter is shortest, and the influence on the operation cost is greatest.

The basic requirements of the engine on the lubricating system mainly include the following two points: first, the oil level in the oil pan should be between the upper and lower limits during a specified maintenance cycle. If the engine oil level exceeds the upper limit, the running resistance of the engine is increased, the efficiency is reduced, the pressure of a crankcase is increased, oil leakage of an oil seal is easy, excessive engine oil enters the combustion chamber of the engine, the engine burns the engine oil, carbon deposition in the combustion chamber is increased, and the performance of the engine is affected. If the oil level of the engine oil is lower than the lower limit, the oil temperature is increased due to the small oil amount, the engine oil is easy to deteriorate, and the oil pressure is reduced, so that the lubrication and the sealing performance among all parts of the engine are poor. Secondly, the quality of the engine oil, such as viscosity, moisture, insoluble content, total base number, etc., should be ensured, if the quality of the engine oil is reduced too fast, the oil filter will be blocked, and the engine oil cannot be filtered normally.

Fig. 1 shows a lubricating system capable of automatically supplementing oil, which comprises an oil storage tank 01, a float switch 02 and an oil pan 03 which are connected in sequence, wherein an air pressure balance pipe 04 and an oil supplementing pipe 05 are connected between the float switch and the oil pan, and the working principle is as follows: the float switch 02 can detect the oil level of the oil in the oil pan 03, when the oil level is reduced to a lower limit set value, the float switch 02 is turned on, the oil in the oil storage tank flows into the float switch 02 by virtue of gravity, and then flows into the oil pan 03 through the oil supplementing pipe 05, and when the oil level is increased to an upper limit set value, the float switch 02 is turned off, and oil supplementing is stopped.

Although the scheme shown in fig. 1 can maintain the oil level in the oil pan, due to the adoption of the float switch for oil supplement control, once the float switch fails, the oil supplement is not timely performed or excessive oil supplement is performed, so that the oil level of the oil pan exceeds the upper limit. Also, the above-described scheme cannot improve the quality of the oil, and thus cannot extend the maintenance period of the quality of the oil.

Disclosure of Invention

The embodiment of the application provides an engine lubricating system, oil supplementing method and assembly method thereof, and an engine, which can maintain the oil level in an oil pan and improve the quality of the oil in the oil pan, thereby greatly prolonging the maintenance period of the lubricating system and reducing the operation cost of customers.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, the present application provides an engine lubrication system, including a crankcase, an auxiliary oil tank, a cold oil pipe, a hot oil pipe and an air pressure balance pipe, wherein an oil pan for containing engine oil is formed at a lower portion of the crankcase, a first port of the cold oil pipe is communicated with the auxiliary oil tank, a second port of the cold oil pipe is communicated with the oil pan, a first port of the hot oil pipe is communicated with the oil pan, a second port of the hot oil pipe is communicated with the auxiliary oil tank, a first port of the cold oil pipe is lower than a second port of the hot oil pipe, an engine oil level in the oil pan is higher than the second port of the cold oil pipe and the first port of the hot oil pipe, the engine oil level in the auxiliary oil tank is higher than the first port of the cold oil pipe and the second port of the hot oil pipe, the air pressure balance pipe is connected between the crankcase and the auxiliary oil tank, for balancing the gas pressure between the crankcase and the auxiliary tank.

The engine lubrication system that the embodiment of this application provided, because cold oil pipe's first port with the auxiliary oil tank intercommunication, cold oil pipe's second port with the oil pan intercommunication, hot oil pipe's first port with the oil pan intercommunication, hot oil pipe's second port with the auxiliary oil tank intercommunication, and cold oil pipe's first port is less than hot oil pipe's second port, pressure balance pipe is used for maintaining the atmospheric pressure in crankcase and the auxiliary oil tank equal all the time, makes oil pan and auxiliary oil tank pass through hot oil pipe and cold oil union coupling formation airtight return circuit, thereby makes the oil pan keep balance all the time with the interior machine oil liquid level of auxiliary oil tank, when the machine oil volume in the oil pan reduces, in the machine oil in the auxiliary oil tank can automatic mend the oil pan, thereby realizes automatic mends oil, makes the maintenance cycle extension of mending oil to this scheme need not set up valve or oil pump and can accomplish mends oil, therefore, excessive oil supplement or insufficient oil supplement caused by the failure of a valve or an oil pump can be avoided, and the cost of the oil supplement device is reduced. When the engine runs, the temperature of the engine oil in the oil pan continuously rises, the temperature difference between the engine oil and the engine oil in the auxiliary oil tank is larger and larger, according to the principle of natural convection of fluid, when the temperature difference reaches a certain value, the power of the natural convection exceeds the pipeline resistance, the engine oil in the oil pan and the engine oil in the auxiliary oil tank start natural circulation convection, namely, the engine oil in the oil pan floats upwards and flows into the auxiliary oil tank through the hot oil pipe, and the engine oil in the auxiliary oil tank is supplemented into the oil pan through the cold oil pipe. The greater the temperature difference, the faster the speed of the circulating convection, which continues for a while due to the temperature difference of the engine oil even if the engine is shut down. From this, circulation convection can take out the machine oil impurity in the oil pan to the auxiliary oil tank in, because the machine oil in the auxiliary oil tank flows steadily relatively, consequently is favorable to the impurity to deposit to improve the machine oil quality in the oil pan, made the maintenance cycle extension of machine oil quality, thereby prolonged lubricating system's maintenance cycle by a wide margin.

In a possible implementation, the second port of the cold oil pipe and the first port of the hot oil pipe may be below a lower oil level limit of the oil pan. Therefore, when the oil level in the oil pan is low, the continuous circulation convection can still be ensured.

In a possible implementation mode, the oil pan is provided with two oil holes, the positions of the two oil holes are both located below the oil level of the oil pan, the first port of the hot oil pipe is connected with one of the oil holes, and the second port of the cold oil pipe is connected with the other oil hole. Therefore, heat conduction between the cold oil pipe and the hot oil pipe can be prevented, and convection circulation is prevented from being influenced.

In a possible implementation mode, the oil pan is provided with two oil holes, the positions of the two oil holes have a height difference, a first port of the hot oil pipe is connected with the oil hole positioned above, and a second port of the cold oil pipe is connected with the oil hole positioned below. Therefore, the lengths of the cold oil pipe and the hot oil pipe are shorter, and the circulating resistance is smaller.

In a possible implementation mode, the oil pan is provided with an oil hole, the oil hole is connected with a switching pipe, the switching pipe comprises an outer layer pipe and an inner layer pipe penetrating through the outer layer pipe, an annular oil duct is formed between the outer layer pipe and the inner layer pipe, one end of the inner layer pipe is communicated with the oil hole of the oil pan, one end of the annular oil duct is communicated with the oil hole of the oil pan, the other end of the annular oil duct is closed, the other end of the inner layer pipe is communicated with a second port of the cold oil pipe, and a first port of the hot oil pipe is communicated with the annular oil duct; or the other end of the inner pipe is communicated with the first port of the hot oil pipe, and the second port of the cold oil pipe is communicated with the annular oil duct. Therefore, the manufacturing process of the oil pan is simple and the sealing performance is better.

In a possible implementation, the inner pipe and the cold oil pipe are integrally formed under the condition that the other end of the inner pipe is communicated with the second port of the cold oil pipe.

In a possible implementation manner, the inner pipe and the hot oil pipe are integrally formed under the condition that the other end of the inner pipe is communicated with the first port of the hot oil pipe. The pipeline manufactured by integral molding has better sealing performance.

In a possible implementation manner, a pipe joint is arranged on the side wall of the outer layer pipe, and the first port of the hot oil pipe can be communicated with the annular oil duct through the pipe joint under the condition that the first port of the hot oil pipe is communicated with the annular oil duct; under the condition that the second port of the cold oil pipe is communicated with the annular oil duct, the second port of the cold oil pipe can be communicated with the annular oil duct through the pipe joint. Therefore, the hot oil pipe is connected with the pipe joint only, so that the connection is convenient and the operation is easy.

In a possible implementation manner, the end part of the inner layer pipe penetrates out of the end part of the outer layer pipe and extends into the oil pan. Therefore, the flowing interference of the low-temperature engine oil and the high-temperature engine oil at the oil hole can be prevented, and the convection circulation is influenced.

In a possible implementation manner, the part of the inner pipe, which is positioned in the outer pipe, is made of an insulating material or is coated with an insulating layer. Therefore, the heat exchange between the high-temperature engine oil and the low-temperature engine oil in the annular oil duct can be reduced, and the continuity of the convection circulation is ensured.

In a possible implementation, the hot oil pipe is made of an insulating material or coated with an insulating layer. Thus, the temperature of oil in the hot oil pipe can be prevented from dropping to maintain the speed of natural circulation.

In a possible implementation manner, the auxiliary oil tank is provided with two oil holes, the two oil holes on the auxiliary oil tank have a height difference and are both located below the oil level in the oil pan, the second port of the hot oil pipe is connected with the oil hole located above, and the first port of the cold oil pipe is connected with the oil hole located below.

In a possible implementation manner, a position of the auxiliary oil tank near the top is provided with an oil filling hole for supplying engine oil into the auxiliary oil tank, and a position of the auxiliary oil tank near the bottom is provided with an oil drain hole for discharging waste engine oil in the auxiliary oil tank.

In a possible implementation, the second port of the cold oil pipe is higher than the first port of the cold oil pipe, and the second port of the hot oil pipe is higher than the first port of the hot oil pipe. Thereby, the rising and discharging of the bubbles at the outlet can be facilitated.

In a possible implementation mode, the auxiliary oil tank is connected with a liquid level sensor, the liquid level sensor is used for detecting the engine oil liquid level in the auxiliary oil tank, the liquid level sensor is connected with a control unit, when the liquid level sensor detects that the engine oil liquid level in the auxiliary oil tank is lower than a preset lower limit value, the control unit outputs information for prompting to refuel, and when the liquid level sensor detects that the engine oil liquid level in the auxiliary oil tank is higher than a preset upper limit value, the control unit outputs information for prompting to stop refuel. Thereby, intelligent management of the lubrication system can be implemented.

In a possible implementation, the engine lubrication system further comprises a cooling device for cooling the auxiliary oil tank. Thereby ensuring the continuous convection circulation.

In possible implementations, the cooling device may employ an air cooling device or a liquid cooling device.

In a second aspect, the present application provides an oil replenishing method for an engine lubrication system, comprising the steps of: the engine oil temperature in the oil pan risees gradually after the engine starts, and the engine oil come-up in the oil pan flows into auxiliary oil tank through hot oil pipe, and the engine oil in the auxiliary oil tank sinks and flows into the oil pan through cold oil pipe to make engine oil form natural circulation between oil pan and auxiliary oil tank.

The engine lubricating system's that this application embodiment provided mends oily method, the engine starts the operation of natural circulation convection current after the certain time, and natural circulation convection current can be with the machine oil impurity in the oil pan take out to the auxiliary oil tank in, because the machine oil in the auxiliary oil tank flows steadily relatively, consequently is favorable to the impurity to deposit to improve the machine oil quality in the oil pan, made the maintenance cycle extension of machine oil quality, thereby prolonged lubricating system's maintenance cycle by a wide margin.

In a third aspect, the present application provides an assembling method of an engine lubrication system including a crankcase, an auxiliary oil tank, a cold oil pipe, a hot oil pipe, and a pneumatic balance pipe, a lower portion of the crankcase forming an oil pan for containing engine oil, the assembling method including the steps of: communicating a first port of the cold oil pipe with the auxiliary oil tank, and communicating a second port of the cold oil pipe with the oil pan; communicating a first port of the hot oil pipe with the oil pan, and communicating a second port of the hot oil pipe with the auxiliary oil tank; connecting the air pressure balancing pipe between the crankcase and the auxiliary oil tank for balancing the air pressure between the crankcase and the auxiliary oil tank; causing both the second port of the cold oil pipe and the first port of the hot oil pipe to be below an oil level within the oil pan; and enabling the first port of the cold oil pipe and the second port of the hot oil pipe to be lower than the oil level in the auxiliary oil tank, and enabling the first port of the cold oil pipe to be lower than the second port of the hot oil pipe.

The assembly method of engine lubrication system that this application embodiment provided, the device of automatic mend oil has been connected on the crankcase, auxiliary oil tank promptly, cold oil pipe, hot oil pipe and atmospheric pressure balance pipe, make oil pan and auxiliary oil tank pass through hot oil pipe and cold oil union coupling and form airtight return circuit, thereby make the oil pan keep balance with the interior machine oil liquid level of auxiliary oil tank all the time, thereby when the machine oil volume in the oil pan reduces, machine oil in the auxiliary oil tank can mend in the oil pan automatically, thereby realize automatic mend oil, make the maintenance cycle extension of mended oil, and this scheme need not set up valve or oil pump and can accomplish mended oil, thereby can avoid leading to mended oil excessive or mended oil not enough because of valve or oil pump trouble, and reduced the cost of mended oil device. And can make machine oil form natural circulation between oil pan and auxiliary oil tank when the engine starts, natural circulation can take out the machine oil impurity in the oil pan to the auxiliary oil tank in, because the machine oil in the auxiliary oil tank flows steadily relatively, consequently is favorable to the impurity to deposit to improve the machine oil quality in the oil pan, made the maintenance cycle extension of machine oil quality, thereby lengthened lubricating system's maintenance cycle by a wide margin.

In a possible implementation manner of the third aspect, the oil pan is provided with two oil holes, the positions of the two oil holes are both below an oil level in the oil pan, the communicating the second port of the cold oil pipe with the oil pan, and the communicating the first port of the hot oil pipe with the oil pan includes: connecting the second port of the cold oil pipe with one of the two oil holes, and connecting the first port of the hot oil pipe with the other of the two oil holes.

In a possible implementation manner of the third aspect, positions of the two oil holes have a height difference, and the connecting the second port of the cold oil pipe with one of the two oil holes and the connecting the first port of the hot oil pipe with the other of the two oil holes includes: and connecting the second port of the cold oil pipe with the oil hole positioned below, and connecting the first port of the hot oil pipe with the oil hole positioned above.

In a possible implementation manner of the third aspect, the oil pan is provided with an oil hole, the oil hole is connected with a switching pipe, the switching pipe includes an outer pipe and an inner pipe penetrating through the outer pipe, the inner pipe is communicated with the oil hole, an annular oil passage is formed between the outer pipe and the inner pipe, one end of the annular oil passage is communicated with the oil hole of the oil pan, the other end of the annular oil passage is sealed, the second port of the cold oil pipe is communicated with the oil pan, and the first port of the hot oil pipe is communicated with the oil pan, and the switching pipe includes: communicating a second port of the cold oil pipe with the inner pipe, and communicating a first port of the hot oil pipe with the annular oil passage; or the second port of the cold oil pipe is communicated with the annular oil passage, and the first port of the hot oil pipe is communicated with the inner-layer pipe.

In a possible implementation manner of the third aspect, the method further includes the following steps: and enabling the end part of the inner layer pipe to penetrate out of the end part of the outer layer pipe and extend into the oil pan.

In a possible implementation manner of the third aspect, a pipe joint is disposed on a side wall of the outer pipe, and communicating the first port of the hot oil pipe with the annular oil passage includes: and communicating the first port of the hot oil pipe with the annular oil duct through the pipe joint.

In a possible implementation manner of the third aspect, the method further includes the following steps: and integrally forming the inner layer pipe and the cold oil pipe.

In a possible implementation manner of the third aspect, the method further includes the following steps: and manufacturing the part of the inner-layer pipe, which is positioned in the outer-layer pipe, by using a heat-insulating material.

In a possible implementation manner of the third aspect, the method further includes the following steps: and the part of the inner layer pipe, which is positioned in the outer layer pipe, is coated with an insulating layer.

In a possible implementation manner of the third aspect, the method further includes the following steps: and manufacturing the hot oil pipe by using a heat insulation material.

In a possible implementation manner of the third aspect, the method further includes the following steps: and the thermal insulation layer is coated outside the hot oil pipe.

In a possible implementation manner of the third aspect, the auxiliary oil tank is opened with two oil holes, the two oil holes on the auxiliary oil tank are located at different heights and are both located below an oil level in the oil pan, and the communicating the first port of the cold oil pipe with the auxiliary oil tank and the communicating the second port of the hot oil pipe with the auxiliary oil tank includes: and connecting a first port of the cold oil pipe with the oil hole positioned below, and connecting a second port of the hot oil pipe with the oil hole positioned above.

In a possible implementation manner of the third aspect, the method further includes the following steps: and the auxiliary oil tank is provided with an oil filling hole for replenishing the engine oil into the auxiliary oil tank at a position close to the top, and an oil drain hole for discharging the waste engine oil in the auxiliary oil tank at a position close to the bottom.

In a possible implementation manner of the third aspect, the method further includes the following steps: the second port of the cold oil pipe is arranged to be higher than the first port of the cold oil pipe, and the second port of the hot oil pipe is arranged to be higher than the first port of the hot oil pipe, so that air bubbles can be conveniently discharged.

In a possible implementation manner of the third aspect, the assembly method further includes a liquid level sensor and a control unit, and the assembly method further includes the following steps: and a liquid level sensor is arranged in the auxiliary oil tank and used for detecting the engine oil level in the auxiliary oil tank and connecting the liquid level sensor with the control unit. Therefore, when the liquid level sensor detects that the oil level in the auxiliary oil tank is lower than a preset lower limit value, the control unit outputs information for prompting oiling, and when the liquid level sensor detects that the oil level in the auxiliary oil tank is higher than a preset upper limit value, the control unit outputs information for prompting stopping oiling. So that intelligent management of the lubrication system can be implemented.

In a possible implementation manner of the third aspect, the assembling method further includes the following steps: and arranging a cooling device, and cooling the auxiliary oil tank through the cooling device.

In a fourth aspect, the present application provides an engine, including the engine lubrication system according to any one of the above technical solutions, an engine crankshaft is disposed in a crankcase of the engine lubrication system, and the engine crankshaft is located above the oil pan.

In a fifth aspect, the present application provides a generator set, including a generator and the engine of the above technical solution, wherein the generator can convert mechanical energy generated by the engine into electric energy.

In a sixth aspect, the present application provides a communication base station, including the generator set according to the above technical solution.

According to the engine, the generator set and the communication base station provided by the embodiment of the application, because the engine adopts any one of the technical schemes, the maintenance period of the engine, the generator set and the communication base station can be prolonged, and the operation cost of customers is reduced.

Drawings

FIG. 1 is a schematic diagram of a lubricating system with automatic oil replenishment;

FIG. 2 is a schematic structural diagram of an engine lubrication system according to an embodiment of the present application;

FIG. 3 is an equivalent schematic diagram of an engine lubrication system according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of another embodiment of an engine lubrication system according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a connection between a transfer pipe and a cold oil pipe in an engine lubrication system according to an embodiment of the present application.

Detailed Description

The embodiment of the application relates to an engine lubricating system, an engine, a generator set and a communication base station, and the concepts related to the embodiment are simply explained as follows:

an engine: an engine is a machine that can convert other forms of energy into mechanical energy, such as an internal combustion engine, an external combustion engine, an electric motor, and the like.

A generator: generators are mechanical devices that convert other forms of energy into electrical energy.

A generator set: a generator set refers to a power generation device that can convert mechanical energy or other renewable energy sources into electrical energy. For example, an engine and a generator may be included that is capable of converting mechanical energy generated by the engine into electrical energy.

The engine oil, namely engine lubricating oil, can play roles in lubricating, antifriction, auxiliary cooling, temperature reduction, sealing, leakage prevention, rust prevention, corrosion prevention, shock absorption, buffering and the like for the engine.

The oil pan, which is the lower half of the engine crankcase, is also known as the lower crankcase. The function is to close the crankcase as the housing of the oil sump, prevent impurities from entering, and to collect and store the lubricating oil flowing back from the friction surfaces of the diesel engine, to dissipate part of the heat and to prevent the lubricating oil from being oxidized.

As shown in fig. 2, the present embodiment provides an engine lubrication system, which includes a crankcase 1, an auxiliary oil tank 2, a cold oil pipe 3, a hot oil pipe 4 and an air pressure balance pipe 5, wherein an oil pan 11 for containing engine oil is formed at a lower portion of the crankcase 1, a first port 31 of the cold oil pipe is communicated with the auxiliary oil tank, a second port 32 of the cold oil pipe is communicated with the oil pan 11, a first port 41 of the hot oil pipe is communicated with the oil pan 11, a second port 42 of the hot oil pipe is communicated with the auxiliary oil tank, the first port 31 of the cold oil pipe is lower than the second port 42 of the hot oil pipe, an oil level in the oil pan 11 is higher than the second port 32 of the cold oil pipe and the first port 41 of the hot oil pipe, an oil level in the auxiliary oil tank is higher than the first port 31 of the cold oil pipe and the second port 42 of the hot oil pipe, the air pressure balance pipe is connected between the crankcase 1 and the auxiliary oil tank, that is, the air pressure balance pipe 5 is used for communicating the upper air part of the crankcase 1 and the upper air part of the auxiliary oil tank 2, so that the air pressure between the crankcase 1 and the auxiliary oil tank is balanced.

The lubricating system that this application embodiment provided, because cold oil pipe's first port 31 with the auxiliary oil tank intercommunication, cold oil pipe's second port 32 with oil pan 11 intercommunication, hot oil pipe's first port 41 with oil pan 11 intercommunication, hot oil pipe's second port 42 with the auxiliary oil tank intercommunication, and cold oil pipe's first port 31 is less than hot oil pipe's second port 42, and the pressure balance pipe is used for maintaining the atmospheric pressure in oil pan 11 and the auxiliary oil tank 2 and equals all the time, makes oil pan 11 and auxiliary oil tank 2 pass through hot oil pipe 4 and cold oil pipe 3 and is connected and form airtight return circuit to make the oil level in oil pan 11 and the auxiliary oil tank 2 keep balance all the time, when the machine oil volume in oil pan 11 reduces, the machine oil in the auxiliary oil tank 2 can be mended in oil pan 11 automatically, thereby realizes automatic mended oil, makes the maintenance cycle extension of mended oil, and this scheme need not set up valve or oil pump and can accomplish the benefit oil to can avoid leading to the benefit oil to be excessive or the benefit oil is not enough because of valve or oil pump trouble, and reduced the cost of benefit oil device. After the engine is running, the temperature of the engine oil in the oil pan 11 gradually rises, the temperature difference between the engine oil and the engine oil in the auxiliary oil tank 2 is larger and larger, according to the principle of natural convection of fluid, when the temperature difference reaches a certain value, the power of the natural convection exceeds the pipeline resistance, the engine oil in the oil pan 11 and the engine oil in the auxiliary oil tank 2 start circulating convection, the equivalent schematic diagram of the embodiment is shown in fig. 3, the high-temperature engine oil in the oil pan 11 flows into the auxiliary oil tank 2 through the hot oil pipe 4, and the low-temperature engine oil in the auxiliary oil tank 2 is supplemented into the oil pan 11 through the cold oil pipe 3. The greater the temperature difference, the faster the speed of the circulating convection, which continues for a while due to the temperature difference of the engine oil even if the engine is shut down. Therefore, the circulation convection can bring out the engine oil impurities in the oil pan 11 to the auxiliary oil tank 2, and the engine oil in the auxiliary oil tank 2 flows relatively stably and is small in fluctuation, so that the impurities are precipitated, the quality of the engine oil in the oil pan 11 is improved, the maintenance period of the quality of the engine oil is prolonged, and the maintenance period of a lubricating system is greatly prolonged.

Specifically, the second port 32 of the cold oil pipe and the first port 41 of the hot oil pipe may be lower than the lower limit of the oil level in the oil pan 11, so that when the oil level in the oil pan 11 is low, the continuous circulation convection can be ensured.

Specifically, when the oil pan 11 has two oil holes, the two oil holes are both located below the oil level of the oil pan 11, the first port 41 of the hot oil pipe 4 is connected to one of the oil holes, and the second port 32 of the cold oil pipe 3 is connected to the other oil hole. Therefore, the cold oil pipe 3 and the hot oil pipe 4 are respectively and independently connected, and a gap is formed between the two oil pipes, so that the cold oil pipe 3 and the hot oil pipe 4 can be prevented from generating heat conduction and influencing convection circulation.

As shown in fig. 2, the two oil holes (a, b) may have a height difference at positions below the liquid level of the oil pan 11, and a first port of the hot oil pipe 4 may be connected to the oil hole a located above and a second port of the cold oil pipe 3 may be connected to the oil hole b located below. Further, the first port of the hot oil pipe 4 may be connected to the oil hole b located below, and the second port of the cold oil pipe 3 may be connected to the oil hole a located above. However, in the scheme shown in fig. 2, the lengths of the cold oil pipe and the hot oil pipe are shorter, and the circulation resistance is smaller.

Correspondingly, the auxiliary oil tank 2 is also provided with two oil holes, the positions of the two oil holes on the auxiliary oil tank 2 have height difference and are both positioned below the oil level in the oil pan 11, the oil hole a is connected with the oil hole above the auxiliary oil tank 2 through a hot oil pipe 4, and the oil hole b is connected with the oil hole below the auxiliary oil tank 2 through a cold oil pipe 3.

When only one oil hole c is formed in the oil pan 11, as shown in fig. 4 and 5, the oil hole c is connected with an adapter tube 6, the adapter tube 6 includes an outer layer tube 62 and an inner layer tube 63 penetrating the outer layer tube 62, one end of the inner layer tube 63 is communicated with the oil hole c of the oil pan 11, an annular oil passage 61 is formed between the outer layer tube 62 and the inner layer tube 63, a first end 611 of the annular oil passage 61 is communicated with the oil hole c of the oil pan 11, a second end 612 of the annular oil passage 61 is closed, the other end of the inner layer tube 63 is communicated with the second port 32 of the cold oil pipe 3, and a first port 41 of the hot oil pipe 4 is communicated with the annular oil passage. Thus, when the convection cycle is turned on, the low-temperature oil in the auxiliary oil tank 2 flows into the oil pan 11 through the cold oil pipe 3 and the inner pipe 63 in order, and the high-temperature oil in the oil pan 11 enters the annular oil passage 61 and flows into the auxiliary oil tank 2 through the hot oil pipe 4. In this embodiment, only one oil hole is formed in the oil pan 11, so that the manufacturing process of the oil pan 11 is simple and the sealing performance is better.

The inner layer pipe 63 and the cold oil pipe can be manufactured in a split mode and then connected, and the inner layer pipe 63 and the cold oil pipe can be directly and integrally formed and manufactured. The sealing performance of the integrally formed pipeline is better.

In order to facilitate connection between the hot oil pipe 4 and the annular oil gallery 61, as shown in fig. 5, a pipe joint 64 may be provided on a side wall of the outer pipe 62, and a pipe hole of the pipe joint 64 is communicated with the annular oil gallery 61, so that only the first port of the hot oil pipe 4 needs to be connected with the pipe joint 64, which is convenient to connect and easy to operate.

In another possible implementation, the inner tube 63 may be further communicated with the first port 41 of the hot oil tube, and the second port 32 of the cold oil tube may be communicated with the annular oil passage. In this case, the inner tube 63 and the hot oil tube may be formed integrally. When the pipe joint 64 is provided on the side wall of the outer pipe 62, the second port 32 of the cold oil pipe can be connected to the pipe joint 64.

In the scheme shown in fig. 4, because the oil pan 11 has only one oil hole, both the low-temperature engine oil and the high-temperature engine oil need to pass through the oil hole, and in order to prevent the low-temperature engine oil and the high-temperature engine oil from flowing and interfering at the oil hole, the end of the inner pipe 63 may penetrate through the end of the outer pipe 62 and extend into the oil pan 11, so that the outlet of the inner pipe 63 is far away from the inlet of the annular oil passage 61, and the low-temperature engine oil and the high-temperature engine oil are prevented from flowing and interfering at the oil hole to affect the convection circulation.

Because a part of the inner tube 63 is inserted into the outer tube 62, the low-temperature engine oil in the section of the inner tube 63 can exchange heat with the high-temperature engine oil in the annular oil passage 61 to a certain extent, and in order to reduce the heat exchange of the part, the part of the inner tube 63 located in the outer tube 62 can be made of heat-insulating material or coated with a heat-insulating layer. Thus, heat exchange between the high-temperature engine oil and the low-temperature engine oil in the annular oil passage 61 can be reduced to ensure continuity of the convection circulation.

In addition, the hot oil pipe can be made of heat-insulating materials or coated with heat-insulating layers. Thus, the temperature of oil in the hot oil pipe can be prevented from dropping to maintain the speed of natural circulation.

The oil hole of the oil pan 11 may be an oil drain hole provided in the oil pan 11 itself, or may be an oil hole additionally formed when the oil pan 11 is manufactured, and is not limited herein.

In order to facilitate the periodic maintenance of the lubricating system, an oil filling hole (not shown in the figure) can be formed in the position, close to the top, of the auxiliary oil tank 2, and an oil drain hole (not shown in the figure) is formed in the position, close to the bottom, of the auxiliary oil tank 2. Thus, the used oil can be discharged through the oil drain hole, and the new oil can be supplied into the auxiliary oil tank 2 through the filler hole. The whole maintenance process only needs to be operated on the auxiliary oil tank 2, and the operation is convenient.

To facilitate the venting, the second port 32 of the cold oil pipe may be made higher than the first port 31 of the cold oil pipe, and the second port 42 of the hot oil pipe may be made higher than the first port 41 of the hot oil pipe. Thereby, the rising and discharging of the bubbles at the outlet can be facilitated.

As shown in fig. 2 and 4, the auxiliary oil tank 2 may be connected to a liquid level sensor 7, and the liquid level sensor 7 may be connected to a control unit to monitor the oil level in the auxiliary oil tank 2 in real time, and since the oil level in the auxiliary oil tank 2 is the same as the oil level in the oil pan 11, it may be determined from this whether the oil level in the oil pan 11 is between the upper limit and the lower limit, and once the oil level exceeds the upper limit or is lower than the lower limit, an alarm signal may be sent out in time, thereby implementing intelligent management.

Since the temperature of the engine oil in the auxiliary oil tank 2 can be raised by the high-temperature engine oil flowing into the auxiliary oil tank 2, a cooling device for cooling the auxiliary oil tank 2 can be provided. Therefore, the oil temperature in the auxiliary oil tank 2 can be always kept at a low temperature, and continuous operation of convection circulation is guaranteed. Specifically, the cooling device may be an air cooling device or a liquid cooling device, for example, a fan may be used to blow air to the auxiliary oil tank 2 for cooling, or a liquid cooling heat pipe may be disposed on the outer wall of the auxiliary oil tank 2 for heat dissipation.

The embodiment of the application also provides an oil supplementing method of the engine lubricating system, which comprises the following steps: the temperature of the engine oil in the oil pan 11 rises gradually after the engine is started, the engine oil in the oil pan 11 floats up and flows into the auxiliary oil tank through the hot oil pipe, and the engine oil in the auxiliary oil tank sinks and flows into the oil pan 11 through the cold oil pipe, so that the engine oil forms natural circulation between the oil pan 11 and the auxiliary oil tank.

The oil supplementing method of the engine lubricating system provided by the embodiment of the application has the advantages that the natural circulation convection starts to operate after the engine is started for a certain time, the natural circulation convection can bring out the engine oil impurities in the oil pan 11 into the auxiliary oil tank, and the engine oil in the auxiliary oil tank flows relatively stably, so that the impurities are favorably precipitated, the quality of the engine oil in the oil pan 11 is improved, the maintenance period of the quality of the engine oil is prolonged, and the maintenance period of the lubricating system is greatly prolonged.

The embodiment of the present application further provides an assembly method of an engine lubrication system, as shown in fig. 2, the engine lubrication system includes a crankcase 1, an auxiliary oil tank 2, a cold oil pipe 3, a hot oil pipe 4, and an air pressure balance pipe 5, an oil pan 11 for containing engine oil is formed at a lower portion of the crankcase 1, and the assembly method includes the following steps: communicating a first port 31 of the cold oil pipe 3 with the auxiliary oil tank 2, and communicating a second port 32 of the cold oil pipe 3 with the oil pan 11; communicating a first port 41 of the hot oil pipe 4 with the oil pan 11, and communicating a second port 42 of the hot oil pipe 4 with the auxiliary oil tank 2; connecting the air pressure balancing pipe 5 between the crankcase 1 and the auxiliary oil tank 2 for balancing the air pressure between the crankcase 1 and the auxiliary oil tank 2; the second port 32 of the cold oil pipe 3 and the first port 41 of the hot oil pipe 4 are both below the oil level in the oil pan 11; the first port 31 of the cold oil pipe 3 and the second port 42 of the hot oil pipe 4 are both below the oil level in the auxiliary oil tank 2, and the first port 31 of the cold oil pipe 3 is below the second port 42 of the hot oil pipe 4.

The assembling method of the engine lubricating system provided by the embodiment of the application, the automatic oil supplementing device is connected to the crankcase 1, namely the auxiliary oil tank 2, the cold oil pipe 3, the hot oil pipe 4 and the air pressure balance pipe 5, the oil pan 11 and the auxiliary oil tank 2 are connected with the cold oil pipe 3 through the hot oil pipe 4 to form a closed loop, so that the oil levels of the oil pan 11 and the auxiliary oil tank 2 are always kept balanced, when the oil amount in the oil pan 11 is reduced, the oil in the auxiliary oil tank 2 can be automatically supplemented into the oil pan 11, automatic oil supplementing is realized, the maintenance period of oil supplementing is prolonged, and the oil supplementing can be completed without arranging a valve or an oil pump in the scheme, so that the excessive oil supplementing or insufficient oil supplementing caused by the fault of the valve or the oil pump can be avoided, and the cost of the oil supplementing device is reduced. And can make machine oil form natural circulation between oil pan 11 and auxiliary oil tank 2 when the engine starts, natural circulation can take out the machine oil impurity in the oil pan 11 to auxiliary oil tank 2 in, because the machine oil flow in the auxiliary oil tank 2 is relatively steady, consequently is favorable to the impurity to deposit to improve the machine oil quality in the oil pan 11, make the maintenance cycle extension of machine oil quality, thereby prolonged lubricating system's maintenance cycle by a wide margin.

In the embodiment shown in fig. 2, the oil pan 11 is provided with two oil holes, and the positions of the two oil holes are both below the oil level in the oil pan 11, and the "communicating the second port 32 of the cold oil pipe 3 with the oil pan 11 and the first port 41 of the hot oil pipe 4 with the oil pan 11" in the above method specifically includes: the second port 32 of the cold oil pipe 3 is connected to one of the two oil holes, and the first port 41 of the hot oil pipe 4 is connected to the other of the two oil holes. This makes it possible to apply the assembly method to the oil pan 11 having only one oil hole.

In the embodiment shown in fig. 4, the oil pan 11 is provided with an oil hole c, the oil hole is connected with an adapter tube 6, the adapter tube 6 includes an outer layer tube 62 and an inner layer tube 63 penetrating through the outer layer tube 62, the inner layer tube 63 is communicated with the oil hole, an annular oil passage 61 is formed between the outer layer tube 62 and the inner layer tube 63, a first end 611 of the annular oil passage 61 is communicated with the oil hole c of the oil pan 11, and a second end 612 of the annular oil passage 61 is closed, where the above-mentioned "communicating the second port 32 of the cold oil pipe 3 with the oil pan 11, and communicating the first port 41 of the hot oil pipe 4 with the oil pan 11" in the above-mentioned method specifically includes: communicating the second port 32 of the cold oil pipe 3 with the inner pipe 63, and communicating the first port 41 of the hot oil pipe 4 with the annular oil passage 61; or the second port 32 of the cold oil pipe 3 is communicated with the annular oil passage 61, and the first port 41 of the hot oil pipe 4 is communicated with the inner pipe 63. This makes it possible to apply the assembling method to the oil pan 11 opened with two oil holes.

The embodiment of the present application further provides an engine, including the engine lubrication system in any one of the above embodiments of the engine lubrication system, as shown in fig. 2, an engine crankshaft 8 is disposed in a crankcase 1 of the engine lubrication system, and the engine crankshaft 8 is located above the oil pan 11.

The embodiment of the application also provides a generator set, which comprises a generator and the engine, wherein the generator can convert mechanical energy generated by the engine into electric energy.

The embodiment of the application also provides a communication base station which comprises the generator set in the embodiment.

According to the engine, the generator set and the communication base station provided by the embodiment of the application, because the engine adopts the engine lubricating system in the embodiment, the maintenance period of the engine, the generator set and the communication base station can be prolonged, and the operation cost of customers is reduced.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. An engine lubrication system, comprising a crankcase, an auxiliary oil tank, a cold oil pipe, a hot oil pipe and an air pressure balance pipe, wherein an oil pan for containing engine oil is formed at the lower part of the crankcase, a first port of the cold oil pipe is communicated with the auxiliary oil tank, a second port of the cold oil pipe is communicated with the oil pan, a first port of the hot oil pipe is communicated with the oil pan, a second port of the hot oil pipe is communicated with the auxiliary oil tank, a first port of the cold oil pipe is lower than a second port of the hot oil pipe, an engine oil level in the oil pan is higher than the second port of the cold oil pipe and the first port of the hot oil pipe, an engine oil level in the auxiliary oil tank is higher than the first port of the cold oil pipe and the second port of the hot oil pipe, the air pressure balance pipe is connected between the crankcase and the auxiliary oil tank, for balancing the gas pressure between the crankcase and the auxiliary tank.

2. The engine lubrication system according to claim 1, wherein the oil pan is provided with two oil holes each located below an oil level in the oil pan, a first port of the hot oil pipe is connected to one of the two oil holes, and a second port of the cold oil pipe is connected to the other of the two oil holes.

3. The engine lubrication system according to claim 2, wherein the two oil holes have a height difference in position, a first port of the hot oil pipe is connected to the oil hole located above, and a second port of the cold oil pipe is connected to the oil hole located below.

4. The engine lubrication system according to claim 1, wherein the oil pan is provided with an oil hole, the oil hole is connected with an adapter tube, the adapter tube comprises an outer layer tube and an inner layer tube penetrating the outer layer tube, an annular oil passage is formed between the outer layer tube and the inner layer tube, one end of the inner layer tube is communicated with the oil hole of the oil pan, one end of the annular oil passage is communicated with the oil hole of the oil pan, and the other end of the annular oil passage is closed;

the other end of the inner pipe is communicated with a second port of the cold oil pipe, and a first port of the hot oil pipe is communicated with the annular oil duct; or

The other end of the inner pipe is communicated with the first port of the hot oil pipe, and the second port of the cold oil pipe is communicated with the annular oil duct.

5. The engine lubrication system according to claim 4, wherein the inner tube is integrally formed with the cold oil pipe with the other end of the inner tube communicating with the second port of the cold oil pipe; or

And under the condition that the other end of the inner-layer pipe is communicated with the first port of the hot oil pipe, the inner-layer pipe and the hot oil pipe are integrally formed.

6. The engine lubrication system according to claim 4 or 5, wherein a pipe joint is provided on a side wall of the outer pipe, and the first port of the hot oil pipe is communicated with the annular oil passage comprises: the first port of the hot oil pipe is communicated with the annular oil duct through the pipe joint;

the second port of the cold oil pipe is communicated with the annular oil passage and comprises: and the second port of the cold oil pipe is communicated with the annular oil duct through the pipe joint.

7. The engine lubrication system of claim 4 or 5, wherein the end of the inner tube passes out of the end of the outer tube and into the oil pan.

8. Engine lubrication system according to claim 4 or 5, characterised in that the portion of the inner tube located inside the outer tube is made of a heat insulating material or is coated with a heat insulating layer.

9. The engine lubrication system according to any one of claims 1-5, wherein the auxiliary oil tank is opened with two oil holes, the two oil holes on the auxiliary oil tank are positioned with a height difference and are both located below the oil level in the oil pan, the second port of the hot oil pipe is connected with the oil hole located above, and the first port of the cold oil pipe is connected with the oil hole located below.

10. The engine lubrication system according to any one of claims 1 to 5, wherein a filler hole for replenishing oil into the auxiliary oil tank is opened near a top portion of the auxiliary oil tank, and an oil drain hole for draining used oil from the auxiliary oil tank is opened near a bottom portion of the auxiliary oil tank.

11. Engine lubrication system according to any of claims 1-5, characterised in that the second port of the cold oil pipe is higher than the first port of the cold oil pipe and the second port of the hot oil pipe is higher than the first port of the hot oil pipe.

12. Engine lubrication system according to any one of claims 1-5, characterised in that a level sensor is connected to the auxiliary oil tank for detecting the oil level in the auxiliary oil tank, the level sensor being connected to a control unit,

when the liquid level sensor detects that the engine oil liquid level in the auxiliary oil tank is lower than a preset lower limit value, the control unit outputs information for prompting oiling, and when the liquid level sensor detects that the engine oil liquid level in the auxiliary oil tank is higher than a preset upper limit value, the control unit outputs information for prompting stopping oiling.

13. Engine lubrication system according to any one of claims 1-5, characterised in that it further comprises cooling means for cooling the auxiliary oil tank.

14. An engine comprising an engine lubrication system according to any one of claims 1 to 13, wherein an engine crankshaft is provided in a crankcase of the engine lubrication system, the engine crankshaft being located above the oil sump.

15. An oil supplementing method of an engine lubricating system is characterized by comprising the following steps:

the engine oil temperature in the oil pan risees gradually after the engine starts, and the engine oil come-up in the oil pan flows into auxiliary oil tank through hot oil pipe, and the engine oil in the auxiliary oil tank sinks and flows into the oil pan through cold oil pipe to make engine oil form natural circulation between oil pan and auxiliary oil tank.

16. An assembling method of an engine lubrication system including a crankcase, an auxiliary oil tank, a cold oil pipe, a hot oil pipe, and a pneumatic pressure balance pipe, a lower portion of the crankcase forming an oil pan for containing engine oil, the assembling method comprising the steps of:

communicating a first port of the cold oil pipe with the auxiliary oil tank, and communicating a second port of the cold oil pipe with the oil pan;

communicating a first port of the hot oil pipe with the oil pan, and communicating a second port of the hot oil pipe with the auxiliary oil tank;

connecting the air pressure balancing pipe between the crankcase and the auxiliary oil tank for balancing the air pressure between the crankcase and the auxiliary oil tank;

causing both the second port of the cold oil pipe and the first port of the hot oil pipe to be below an oil level within the oil pan; and enabling the first port of the cold oil pipe and the second port of the hot oil pipe to be lower than the oil level in the auxiliary oil tank, and enabling the first port of the cold oil pipe to be lower than the second port of the hot oil pipe.

17. The method of assembling of claim 16, wherein the oil pan is provided with two oil holes each located below an oil level in the oil pan, the communicating the second port of the cold oil pipe with the oil pan, and the communicating the first port of the hot oil pipe with the oil pan comprises:

connecting the second port of the cold oil pipe with one of the two oil holes, and connecting the first port of the hot oil pipe with the other of the two oil holes.

18. The assembling method according to claim 16, wherein the oil pan is provided with an oil hole, the oil hole is connected with an adapter tube, the adapter tube comprises an outer layer tube and an inner layer tube arranged in the outer layer tube in a penetrating manner, the inner layer tube is communicated with the oil hole, an annular oil passage is formed between the outer layer tube and the inner layer tube, one end of the annular oil passage is communicated with the oil hole of the oil pan, the other end of the annular oil passage is closed, the communicating the second port of the cold oil pipe with the oil pan, and the communicating the first port of the hot oil pipe with the oil pan comprises:

communicating the second port of the cold oil pipe with the inner pipe, and communicating the first port of the hot oil pipe with the annular oil passage, or

And communicating the second port of the cold oil pipe with the annular oil passage, and communicating the first port of the hot oil pipe with the inner-layer pipe.