CN212337445U

CN212337445U - Forced cooling system of supercharger

Info

Publication number: CN212337445U
Application number: CN202020545902.4U
Authority: CN
Inventors: 余超; 叶双超; 盛利; 覃星念; 杨仕明; 陈小峰; 黎华文
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2021-01-12
Anticipated expiration: 2030-04-14

Abstract

The utility model belongs to the field of engines, in particular to a forced cooling system of a supercharger, which comprises a supercharger, a water inlet pipeline and a water return pipeline which are respectively arranged at two ends of the supercharger, an engine main water pump which is arranged on the water inlet pipeline, and an electronic water pump which is arranged at the downstream of the engine main water pump in series, wherein the electronic water pump is arranged on the water inlet pipeline, the electronic water pump comprises a shell and an impeller which is arranged inside the shell, an annular circulation gap is arranged between the impeller and the shell, the cross-sectional area of the circulation gap is larger than the minimum circulation area of the pipeline of the forced cooling system of the supercharger, and the water return pipeline is; the electronic water pump is adopted, so that the problems of dry grinding, high-temperature coking and the like of a supercharger rotor system are avoided, the running time of the electronic water pump is reduced, and the service life of the electronic water pump is prolonged.

Description

Forced cooling system of supercharger

Technical Field

The utility model belongs to the engine field specifically is a booster forced cooling system.

Background

Superchargers have been widely used in engines for their effectiveness in increasing engine power, reducing fuel consumption, and improving emissions. The turbocharger is connected with the exhaust pipe when in work, and the rotating speed of the turbocharger is up to hundreds of thousands of revolutions per minute when in normal work, so that the rotating shaft and the bearing of the turbocharger must be ensured to be good, and a large amount of heat in the turbocharger is taken away from the turbocharger through the flowing of cooling liquid, thereby playing a role in protection.

To the booster, certain machine oil and the machine oil pressure that traditional lubrication and cooling method provided through the water pump lubricate the booster of engine, utilize the flow of lubricating oil to bring the heat back to the oil pan simultaneously, play lubricated and cooling effect, shell booster in the middle of the present also wide use water-cooling, hydrologic cycle power derives from engine owner water pump. When the engine is normally stopped, the temperature of an exhaust system is reduced in a mode that the engine runs for 3-5 minutes at idle speed, so that the temperature of a bearing is reduced, and the protection of the supercharger is realized.

Traditional booster lubrication and cooling mode, like the turbo charger protection device that cuts off oil that chinese patent CN103184928A disclosed, includes a tee bend water pipe, and turbo charger is connected to the first branch road of this tee bend water pipe, and the lubricated oil circuit of engine is connected to the second branch road, and booster protection device that cuts off oil is connected to the third branch road, wherein: a one-way valve which is communicated from the engine to the three-way water pipe in one way is arranged in the first branch; the oil cut-off protection device stores lubricating oil when the engine is normally operated, and inputs the stored lubricating oil into the supercharger when the engine is stopped. The turbocharger oil-stop protection device can store lubricating oil when an engine runs, and can input the stored lubricating oil into the turbocharger for cooling and lubricating when the engine stops, so that the turbocharger oil-stop protection device can save energy and is suitable for the conditions of frequent starting and stopping and accidental stopping of the engine. However, it has the following disadvantages:

1. when the engine is normally stopped, the supercharger needs to be cooled, the engine needs to idle for a long enough time, and a lot of energy is wasted;

2. if the engine is suddenly stopped due to uncertain factors, the water pump and the water pump stop running at the moment, the engine oil and the cooling liquid cannot be continuously provided for the supercharger for cooling protection, a large amount of heat accumulated at a rotating shaft and a bearing of the supercharger cannot be dissipated in time, and after the engine is stopped, an impeller of the supercharger still continuously rotates for a period of time under the condition of no engine oil due to inertia, so that the local overheating of the supercharger can be caused, the rotating shaft and the bearing of the supercharger can be burnt, and the service life of the supercharger and even the whole engine can be shortened;

3. on some engines which are frequently started and stopped, such as diesel oil and electric power hybrid engines, there is not enough time to idle and dissipate heat, and the idling mode cannot meet the requirement of effectively protecting the supercharger.

For another example, chinese patent CN206158851U discloses a lubrication oil circuit for a supercharger of a hybrid power engine, which uses a motor water pump to pump oil continuously by an electronic water pump after the engine is stopped, so as to provide engine oil for lubrication and cooling of the supercharger of the hybrid power vehicle, but the electronic water pump needs to operate constantly to cool the supercharger, the working time of the motor water pump is long, the service life of the motor water pump is reduced, the damage of the electronic water pump easily blocks a water inlet pipeline of the supercharger, and the risk of rapid failure due to water shortage of the supercharger is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a forced cooling system of a supercharger, which adopts an electronic water pump, when an engine is shut down, the electronic water pump can continue to operate, takes away the heat of an exhaust system, reduces the temperature of a rotor system of a turbocharger, and solves the problems of high temperature coking and the like of the rotor system of the supercharger caused by frequent starting and stopping of the engine and special application of hybrid power; the electronic water pump is provided with the flow area, the electronic water pump does not need to be started, the cooling of the supercharger can be realized, the operation time of the electronic water pump is reduced, and the service life of the electronic water pump is prolonged.

The technical scheme of the utility model as follows: the electronic water pump is arranged on the water inlet pipeline, so that the heat load of the electronic water pump can be reduced, and the service life of the electronic water pump can be prolonged;

the electronic water pump comprises a shell and an impeller arranged in the shell, an annular circulation gap is formed between the impeller and the shell, the circulation gap is formed in the outer side of the circumference of the impeller, and when the electronic water pump stops working, cooling liquid can circulate from the circulation gap. The cross-sectional area of the circulation gap is larger than the minimum circulation area of a pipeline of the supercharger cooling system, and the water return pipeline is communicated with a water circulation passage of the engine to form cooling circulation.

The electronic water pump and the main water pump of the engine are arranged in series, so that the problems of dry grinding, high-temperature coking and the like of a supercharger rotor system caused by frequent starting and stopping of the engine, misoperation of a user and special application of hybrid power are solved; in addition, the electronic water pump is provided with a flow area, the electronic water pump does not need to be started, the cooling of the supercharger can be realized, the operation time of the electronic water pump is reduced, and the service life of the electronic water pump is prolonged.

Preferably, the utility model also comprises a bearing temperature sensor arranged on the supercharger, wherein the bearing temperature sensor forms closed-loop control according to the bearing temperature monitored by the bearing temperature sensor, and accurately controls the coolant flow of the electronic water pump and the bearing temperature of the supercharger;

furthermore, the utility model discloses also can not take bearing temperature sensor, electronic pump and engine owner water pump are markd according to the engine, define out safe coolant liquid flow.

Preferably, the cross-sectional area of circulation clearance is equivalent to the pipe diameter area that the internal diameter is 8 ~ 12mm, and the coolant circulation area in this scope can satisfy cooling system's flow requirement, also is favorable to the coolant liquid through in the impeller to pass through with higher speed, and the radiating block is difficult for damaging the water pump, prolongs electron water pump life greatly.

The utility model has the advantages that:

1. the series electronic water pump is adopted, so that the problems of high-temperature coking of a supercharger rotor system and the like caused by frequent starting and stopping of an engine, misoperation of a user and special application of hybrid power are solved.

2. The electronic water pump sets up on water inlet pipe to adopt special structural design, promptly the impeller with be provided with annular circulation clearance between the casing, reduced electronic water pump's operating duration, promoted electronic water pump's life, avoided simultaneously because electronic water pump damages and blocks up the booster pipeline, inefficacy risk when leading to the booster lack of water.

Drawings

Fig. 1 is a block diagram schematically illustrating a structure of a forced cooling system for a supercharger according to the present invention.

Fig. 2 is a schematic view of the electronic water pump of the present invention.

In the figure: 1-a supercharger, 2-a water inlet pipeline, 3-a water return pipeline, 4-a water circulation path, 5-an electronic water pump, 501-a shell, 502-an impeller, 503-a circulation gap, 6-an engine main water pump, 7-a bearing temperature sensor and 8-an engine controller.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

Example 1:

as shown in fig. 1 and 2, the forced cooling system for the supercharger comprises a supercharger 1, a water inlet pipeline 2 and a water return pipeline 3 which are respectively arranged at two ends of the supercharger 1, an engine main water pump 6 arranged on the water inlet pipeline 2, and an electronic water pump 5 which is arranged at the downstream of the engine main water pump 6 in series, wherein the electronic water pump 5 is arranged on the water inlet pipeline 2, and the water return pipeline 3 is communicated with a water circulation path 4 of an engine.

As shown in fig. 2, the electronic water pump 5 includes a housing 501 and an impeller 502 disposed inside the housing 501, an annular flow gap 503 is disposed between the impeller 502 and the housing 501, and a cross-sectional area of the flow gap 503 is larger than a minimum flow area of a pipeline of the forced cooling system of the supercharger.

Electronic pump 5 and engine main water pump 6 series arrangement, when the engine normal operating, because the inside circulation clearance 503 that is provided with of electronic pump 5, there is certain flow area, most engine operating mode need not to open electronic pump 5, rely on engine main water pump 6 can realize the cooling of booster, when engine main water pump 6 supplies the coolant liquid not enough to cool off booster 1, electronic pump 5 starts, provide higher coolant liquid flow, electronic pump 5 can be set to normally open state, can mark the open strategy who confirms electronic pump 5 according to the engine, the operating time of electronic pump 5 has been reduced in this design, the life of electronic pump 5 has been promoted, avoided simultaneously because electronic pump 5 damages to block up booster 1 cooling channel, lead to the risk of booster 1 water shortage quick failure.

Example 2:

The present embodiment further comprises a bearing temperature sensor 7 provided on the supercharger 1.

The cross-sectional area of the flow-through gap 503 corresponds to the area of a pipe diameter having an inner diameter of 8 mm.

The cooling liquid sequentially passes through a water inlet pipeline 2, an engine main water pump 6, an electronic water pump 5, a supercharger 1 and a water return pipeline 3, and finally enters a water circulation passage 4.

Electronic pump 5 arranges in the 1 side of intaking of booster, arrange with the 6 series connection of engine main water pump, pressure boost cooling system is in the water intaking of engine inner loop main water pump high pressure side, because there is certain flow area electronic pump 5 inside, most engine operating mode need not to open electronic pump 5, rely on the cooling that engine main water pump 6 can realize the booster, when engine main water pump 6 supplies the coolant liquid not enough to cool off booster 1, electronic pump 5 starts, provide higher coolant liquid flow. This design has reduced electronic pump 5's operating duration, has promoted electronic pump 5's life, has avoided simultaneously because electronic pump 5 damages and blocks up 1 inlet channel of booster, leads to the risk of 1 water shortage rapid failure of booster.

When the engine is stopped, the electronic water pump 5 continues to operate for a period of time, and the temperature of an exhaust system is reduced, so that the temperature of a bearing is reduced, and the supercharger 1 is protected; the electronic water pump 5 can supply cooling liquid at a fixed rotating speed and in a delayed time. The bearing temperature sensor 7 arranged on the supercharger 1 is additionally arranged, the bearing temperature sensor 7 and the electronic water pump 5 are electrically connected with the engine controller 8, and the time for supplying cooling liquid and the bearing temperature of the supercharger 1 are accurately controlled in a closed-loop mode according to the bearing temperature. The engine controller 8 is an ECU electronic control unit, also called a traveling computer, and is a special microcomputer controller for the engine.

Example 3:

the difference between this embodiment and embodiment 2 is that the cross-sectional area of the flow gap 503 corresponds to the pipe diameter area with an inner diameter of 12mm, the bearing temperature sensor 7 is not provided in this embodiment, and the electronic water pump 5 is calibrated according to the engine, so as to define a safe coolant flow.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. The utility model provides a cooling system is forced to booster, includes booster (1), sets up respectively water intake pipe (2) and return water pipeline (3) at booster (1) both ends set up engine owner water pump (6) on water intake pipe (2), its characterized in that: the engine water circulation system is characterized by further comprising an electronic water pump (5) which is arranged on the downstream of the engine main water pump (6) in a series mode, the electronic water pump (5) is arranged on the water inlet pipeline (2), the electronic water pump (5) comprises a shell (501) and an impeller (502) which is arranged inside the shell (501), an annular circulation gap (503) is arranged between the impeller (502) and the shell (501), the cross sectional area of the circulation gap (503) is larger than the minimum circulation area of a pipeline of the supercharger forced cooling system, and the water return pipeline (3) is communicated with a water circulation passage (4) of the engine.

2. A forced cooling system for a supercharger according to claim 1, wherein: the turbocharger also comprises a bearing temperature sensor (7) arranged on the supercharger (1).

3. A forced cooling system for a supercharger according to any one of claims 1 to 2, wherein: the cross-sectional area of the flow gap (503) is equivalent to the pipe diameter area with the inner diameter of 8-12 mm.