CN114233469A - Method and device for preventing engine oil leakage of turbocharger, engine and engineering vehicle - Google Patents

Method and device for preventing engine oil leakage of turbocharger, engine and engineering vehicle Download PDF

Info

Publication number
CN114233469A
CN114233469A CN202111501840.2A CN202111501840A CN114233469A CN 114233469 A CN114233469 A CN 114233469A CN 202111501840 A CN202111501840 A CN 202111501840A CN 114233469 A CN114233469 A CN 114233469A
Authority
CN
China
Prior art keywords
bearing body
air pressure
pressure
inner cavity
condition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202111501840.2A
Other languages
Chinese (zh)
Other versions
CN114233469B (en
Inventor
周成尧
丁树峰
王坚钢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Deutz Power Co Ltd
Original Assignee
Hunan Deutz Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hunan Deutz Power Co Ltd filed Critical Hunan Deutz Power Co Ltd
Priority to CN202111501840.2A priority Critical patent/CN114233469B/en
Publication of CN114233469A publication Critical patent/CN114233469A/en
Application granted granted Critical
Publication of CN114233469B publication Critical patent/CN114233469B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/14—Lubrication of pumps; Safety measures therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/057—Bearings hydrostatic; hydrodynamic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/06—Lubrication
    • F04D29/063—Lubrication specially adapted for elastic fluid pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Supercharger (AREA)

Abstract

The invention provides a method and a device for preventing engine oil leakage of a turbocharger, an engine and an engineering vehicle, wherein the method for preventing the engine oil leakage of the turbocharger comprises the following steps: acquiring vortex end air pressure, pressure end air pressure and bearing body inner cavity air pressure; when at least one condition of a first condition and a second condition is determined to be met, starting a fan communicated with the inner cavity of the bearing body to reduce the air pressure of the inner cavity of the bearing body, wherein the first condition is that the pressure difference between the air pressure of the vortex end and the air pressure of the inner cavity of the bearing body is lower than a first threshold value, and the second condition is that the pressure difference between the air pressure of the pressure end and the air pressure of the inner cavity of the bearing body is lower than a second threshold value. The method and the device for preventing the engine oil leakage of the turbocharger, the engine and the engineering vehicle can effectively prevent the engine oil from leaking into the vortex end and the pressure end of the turbocharger, and further avoid the problem of increased engine oil consumption of the engine.

Description

Method and device for preventing engine oil leakage of turbocharger, engine and engineering vehicle
Technical Field
The invention relates to the technical field of turbochargers, in particular to a method and a device for preventing engine oil leakage of a turbocharger, an engine and an engineering vehicle.
Background
In the prior art, a turbocharger includes a bearing body, a turbine, an impeller and a connecting shaft, wherein the bearing body is provided with an inner cavity, two ends of the bearing body are respectively a pressure end and a vortex end, the pressure end is communicated with an air inlet channel of an engine, the vortex end is communicated with an exhaust channel of the engine, the turbine and the impeller are respectively arranged at the vortex end and the pressure end, the turbine and the impeller are connected through the connecting shaft, and the connecting shaft penetrates through the inner cavity of the bearing body. Machine oil can be guided into in the inner cavity of the bearing body to realize the lubricating effect on the connecting shaft, and in order to avoid the machine oil from entering the vortex end and the pressure end, the vortex end and the pressure end are separated from the inner cavity of the bearing body through a sealing piece.
Under normal working conditions, the wheel backs (the impeller back and the turbine back) at the two ends of the supercharger have certain gas pressure, so that the engine oil cannot flow from the low-pressure area to the high-pressure area, namely, the fault of engine oil leakage cannot occur.
However, when the gas pressure in the inner cavity of the bearing body is greater than the gas pressure at the vortex end or the pressure end, an oil leakage fault can occur, so that the oil consumption of the engine is increased, the lubrication of the engine is affected, and the engine can be damaged in severe cases.
Disclosure of Invention
The invention provides a method and a device for preventing engine oil leakage of a turbocharger, an engine and an engineering vehicle, which can effectively prevent engine oil from leaking into a vortex end and a pressure end of the turbocharger, and further avoid the problem of increased engine oil consumption of the engine.
A first aspect of the present invention provides a method of preventing oil leakage from a turbocharger, including:
acquiring vortex end air pressure, pressure end air pressure and bearing body inner cavity air pressure;
when at least one condition of a first condition and a second condition is determined to be met, starting a fan communicated with the inner cavity of the bearing body to reduce the air pressure of the inner cavity of the bearing body, wherein the first condition is that the pressure difference between the air pressure of the vortex end and the air pressure of the inner cavity of the bearing body is lower than a first threshold value, and the second condition is that the pressure difference between the air pressure of the pressure end and the air pressure of the inner cavity of the bearing body is lower than a second threshold value.
According to the method for preventing the engine oil leakage of the turbocharger, provided by the invention, the condition that at least one of a first condition and a second condition is met is determined, and when the duration time for meeting the condition exceeds the preset time, alarm information is sent out.
According to the method for preventing the engine oil leakage of the turbocharger, the fan is controlled to be in a stop state when the first condition is determined not to be met and the second condition is determined not to be met.
According to the method for preventing the engine oil leakage of the turbocharger, provided by the invention, the pressure end air pressure is obtained, and the method comprises the following steps: acquiring air pressure at the back of the impeller;
obtaining vortex end air pressure, comprising: acquiring air pressure at the back of the turbine;
obtain bearing body inner chamber atmospheric pressure, include: acquiring air pressure of the inner cavity of the bearing body close to the pressure end sealing ring and acquiring air pressure of the inner cavity of the bearing body close to the vortex end sealing ring;
the first condition is that the pressure difference between the air pressure at the back of the turbine and the air pressure at the position, close to the vortex-end sealing ring, of the inner cavity of the bearing body is lower than a first threshold value; and the second condition is that the pressure difference between the air pressure at the back of the impeller and the air pressure at the position, close to the pressure end sealing ring, of the inner cavity of the bearing body is lower than a second threshold value.
A second aspect of the present invention provides an oil leakage preventing device for a turbocharger, comprising:
the vortex end sensor is used for acquiring vortex end air pressure;
the pressure end sensor is used for acquiring the pressure of the pressure end;
the bearing body inner cavity sensor is used for acquiring the inner cavity air pressure of the bearing body;
the fan is used for driving the air in the inner cavity of the bearing body to be discharged;
the controller, with whirlpool end inductor, pressure end inductor, bearing body inner chamber inductor and the fan electricity is connected, the controller is used for: when at least one condition of a first condition and a second condition is determined to be met, controlling to start a fan communicated with the inner cavity of the bearing body so as to reduce the air pressure of the inner cavity of the bearing body, wherein the first condition is that the pressure difference between the air pressure of the vortex end and the air pressure of the inner cavity of the bearing body is lower than a first threshold value, and the second condition is that the pressure difference between the air pressure of the pressure end and the air pressure of the inner cavity of the bearing body is lower than a second threshold value.
The device for preventing the engine oil leakage of the turbocharger further comprises an alarm module, the alarm module is electrically connected with the controller, the controller determines that at least one of the first condition and the second condition is met, and when the duration time of meeting the conditions exceeds preset time, the alarm module is controlled to send alarm information.
According to the device for preventing the engine oil leakage of the turbocharger, the pressure end sensor is arranged at the back of the impeller, the vortex end sensor is arranged at the back of the turbine, the bearing body inner cavity sensor comprises a first bearing body inner cavity sensor and a second bearing body inner cavity sensor, the first bearing body inner cavity sensor is used for acquiring the air pressure of the inner cavity of the bearing body close to the position of the vortex end sealing ring, and the second bearing body inner cavity sensor is used for acquiring the air pressure of the inner cavity of the bearing body close to the position of the pressure end sealing ring; the first condition is that the pressure difference between the air pressure at the back of the turbine and the air pressure at the position, close to the vortex-end sealing ring, of the inner cavity of the bearing body is lower than a first threshold value; and the second condition is that the pressure difference between the air pressure at the back of the impeller and the air pressure at the position, close to the pressure end sealing ring, of the inner cavity of the bearing body is lower than a second threshold value.
A third aspect of the invention provides an engine including a turbocharger and an oil leakage prevention device as defined in any one of the above.
According to the engine provided by the invention, the inner cavity of the crankcase of the engine is communicated with the inner cavity of the bearing body of the turbocharger, and the fan is arranged at the position of the ventilation opening of the crankcase.
A fourth aspect of the invention provides an engineering vehicle, which comprises a machine body and an engine arranged on the machine body, wherein the engine is the engine as described in any one of the above aspects.
Has the advantages that:
in the technical scheme provided by the invention, when the pressure difference between the air pressure of the vortex end and the air pressure of the inner cavity of the bearing body is lower than a first threshold value and/or when the pressure difference between the air pressure of the pressure end and the air pressure of the inner cavity of the bearing body is lower than a second threshold value, a fan communicated with the inner cavity of the bearing body is started to reduce the air pressure of the inner cavity of the bearing body. And the pressure difference between the vortex end and the pressure end and the inner cavity of the bearing body is utilized to prevent the engine oil in the inner cavity of the bearing body from leaking into the vortex end and the pressure end.
Therefore, the method for preventing the engine oil of the turbocharger provided by the invention can effectively prevent the engine oil from leaking into the vortex end and the pressure end of the turbocharger, thereby avoiding the problem of increased engine oil consumption of an engine.
In a further technical scheme provided by the invention, when the pressure difference between the air pressure of the vortex end and the air pressure in the inner cavity of the bearing body is lower than a first threshold value and the duration time exceeds the preset time, and/or when the pressure difference between the air pressure of the vortex end and the air pressure in the inner cavity of the bearing body is lower than a second threshold value and the duration time exceeds the preset time, alarm information is sent. Therefore, the engine user is reminded through alarming, and the engine is prevented from being damaged.
Thirdly, in a further technical scheme provided by the invention, acquiring the pressure of the pressure end comprises the following steps: acquiring air pressure at the back of the impeller;
obtaining vortex end air pressure, comprising: acquiring air pressure at the back of the turbine;
obtain bearing body inner chamber atmospheric pressure, include: acquiring air pressure of the inner cavity of the bearing body close to the pressure end sealing ring and acquiring air pressure of the inner cavity of the bearing body close to the vortex end sealing ring;
the first condition is that the pressure difference between the air pressure at the back of the turbine and the air pressure at the position, close to the vortex-end sealing ring, of the inner cavity of the bearing body is lower than a first threshold value; and the second condition is that the pressure difference between the air pressure at the back of the impeller and the air pressure at the position, close to the pressure end sealing ring, of the inner cavity of the bearing body is lower than a second threshold value.
Therefore, when the pressure difference between the air pressure at the back of the turbine and the air pressure at the position, close to the vortex end sealing ring, of the inner cavity of the bearing body is lower than a first threshold value, and/or when the pressure difference between the air pressure at the back of the impeller and the air pressure at the position, close to the pressure end sealing ring, of the inner cavity of the bearing body is lower than a second threshold value, the fan communicated with the inner cavity of the bearing body is started, and the air pressure of the inner cavity of the bearing body is reduced. The air pressure of the back position of the turbine and the air pressure of the inner cavity of the bearing body close to the position of the vortex end sealing ring can more accurately feed back the pressure on two sides of the inner cavity of the bearing body close to the vortex end sealing ring, and similarly, the air pressure of the back position of the impeller and the air pressure of the inner cavity of the bearing body close to the position of the pressure end sealing ring can more accurately feed back the pressure on two sides of the inner cavity of the bearing body close to the pressure end sealing ring, so that the engine oil in the inner cavity of the bearing body can be further prevented from leaking into the vortex end and the pressure end.
The turbocharger engine oil leakage prevention device, the engine and the engineering vehicle can effectively prevent engine oil from leaking into a vortex end and a pressure end of the turbocharger, and further avoid the problem of increased engine oil consumption of the engine. The derivation process of the beneficial effect is substantially similar to the derivation process of the beneficial effect brought by the method for preventing the engine oil leakage of the turbocharger, and the details are not repeated here.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a method for preventing oil leakage of a turbocharger according to an embodiment of the invention;
FIG. 2 is a schematic view of a turbocharger in an embodiment of the present invention;
FIG. 3 is a schematic view of an oil leakage preventing device of a turbocharger according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of an engine system according to an embodiment of the present invention;
1: a turbocharger; 1 a: an impeller; 1 b: a bearing body;
1 c: a pressure end sealing ring; 1 d: a vortex end seal ring; 1 e: a turbine;
2 a: a pressure end sensor; 2 b: a second bearing body inner cavity inductor; 2c, a first bearing body inner cavity inductor;
2d, a vortex end inductor; 3: a controller; 4: a fan;
5: and an alarm module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following describes, with reference to fig. 1 to 4, a method, an apparatus, an engine, and an engineering vehicle for preventing oil leakage from a turbocharger in an embodiment of the present invention, which can effectively prevent oil from leaking into a vortex end and a pressure end of the turbocharger 1, thereby avoiding a problem of increased oil consumption of the engine.
Referring to fig. 1, the method for preventing oil leakage of a turbocharger according to the present embodiment includes the steps of:
s11, acquiring vortex end air pressure, pressure end air pressure and bearing body inner cavity air pressure;
and S12, when at least one condition of a first condition and a second condition is determined to be met, starting the fan 4 communicated with the inner cavity of the bearing body to reduce the air pressure of the inner cavity of the bearing body, wherein the first condition is that the pressure difference between the air pressure of the vortex end and the air pressure of the inner cavity of the bearing body is lower than a first threshold value, and the second condition is that the pressure difference between the air pressure of the pressure end and the air pressure of the inner cavity of the bearing body is lower than a second threshold value.
It should be noted that the bearing body 1b is provided with an inner cavity, two ends of the bearing body 1b are respectively a pressure end and a vortex end, a pressure end sealing ring 1c is arranged between the pressure end and the inner cavity of the bearing body, a vortex end sealing ring 1d is arranged between the vortex end and the inner cavity of the bearing body, the pressure end is communicated with an air inlet channel of the engine, an impeller 1a is arranged in the pressure end, and the impeller 1a can compress air and improve the air inlet pressure of the engine. The vortex end is communicated with an exhaust passage of the engine, the turbine 1e is arranged in the vortex end, the turbine 1e can be driven to rotate when the engine exhausts, the turbine 1e is connected with the impeller 1a through a connecting shaft penetrating through an inner cavity of the bearing body, and the impeller 1a is driven to rotate through the turbine 1 e. The engine oil of the engine enters the inner cavity of the bearing body and can play a role in lubricating the connecting shaft. And the sealing rings are respectively arranged between the pressure end and the inner cavity of the bearing body and between the vortex end and the inner cavity of the bearing body and used for preventing engine oil from entering the pressure end or the vortex end.
In the technical scheme provided by this embodiment, when the pressure difference between the vortex end air pressure and the bearing body inner cavity air pressure is lower than the first threshold value, and/or when the pressure difference between the vortex end air pressure and the bearing body inner cavity air pressure is lower than the second threshold value, the fan 4 communicated with the bearing body inner cavity is started to reduce the bearing body inner cavity air pressure. And the pressure difference between the vortex end and the pressure end and the inner cavity of the bearing body is utilized to prevent the engine oil in the inner cavity of the bearing body from leaking into the vortex end and the pressure end.
Therefore, the method for preventing the engine oil leakage of the turbocharger provided by the embodiment can effectively avoid the engine oil from leaking into the vortex end and the pressure end of the turbocharger 1, and further avoid the problem of increased engine oil consumption of the engine.
According to the method for preventing the engine oil leakage of the turbocharger, provided by the invention, the condition that at least one of the first condition and the second condition is met is determined, and when the duration time of the condition meeting exceeds the preset time, alarm information is sent out.
Namely, when the pressure difference between the vortex end air pressure and the bearing body inner cavity air pressure is lower than a first threshold value and the duration time exceeds the preset time, and/or when the pressure difference between the pressure end air pressure and the bearing body inner cavity air pressure is lower than a second threshold value and the duration time exceeds the preset time, alarm information is sent.
The preset time may be specifically set according to actual conditions, and for example, may be specifically set to 1 minute, 2 minutes, and the like. The above alarm information sending may be specifically a mode of sending an alarm sound or turning on an alarm lamp.
Therefore, the engine user can be reminded in an alarming mode, and the engine is prevented from being damaged.
In a further embodiment, the present embodiment provides a method for preventing oil leakage of a turbocharger, which controls the fan 4 to be in a stopped state when it is determined that the first condition is not satisfied and the second condition is not satisfied.
That is, when the pressure difference between the vortex end air pressure and the bearing body cavity air pressure is not lower than the first threshold, and when the pressure difference between the pressure end air pressure and the bearing body cavity air pressure is not lower than the second threshold, the blower 4 is controlled to be in the shutdown state. When no risk of oil leakage exists, the fan 4 is controlled to be in a stop state, and energy consumption can be saved.
Further, in the method for preventing the oil leakage of the turbocharger,
obtaining tip air pressure, comprising: acquiring the air pressure at the back of the impeller 1 a;
obtaining vortex end air pressure, comprising: acquiring air pressure at the back of the turbine 1 e;
obtain bearing body inner chamber atmospheric pressure, include: acquiring air pressure of the inner cavity of the bearing body close to the pressure end sealing ring 1c and acquiring air pressure of the inner cavity of the bearing body close to the vortex end sealing ring 1 d;
the first condition is that the pressure difference between the air pressure at the back of the turbine 1e and the air pressure at the position of the inner cavity of the bearing body close to the vortex-end sealing ring 1d is lower than a first threshold value; the second condition is that the pressure difference between the air pressure at the back of the impeller 1a and the air pressure at the position of the bearing body inner cavity close to the pressure end sealing ring 1c is lower than a second threshold value.
Therefore, when the pressure difference between the air pressure at the back of the turbine 1e and the air pressure at the position, close to the vortex end sealing ring 1d, of the inner cavity of the bearing body is lower than a first threshold value, and/or when the pressure difference between the air pressure at the back of the impeller 1a and the air pressure at the position, close to the pressure end sealing ring 1c, of the inner cavity of the bearing body is lower than a second threshold value, the fan 4 communicated with the inner cavity of the bearing body is started to reduce the air pressure of the inner cavity of the bearing body.
The atmospheric pressure of turbine 1e back position and the atmospheric pressure that the bearing body inner chamber is close to vortex end sealing ring 1d position can more accurately react the both sides pressure that the bearing body inner chamber is close to vortex end sealing ring 1d, and is same, the atmospheric pressure of impeller 1a back position and the atmospheric pressure that the bearing body inner chamber is close to pressure end sealing ring 1c position, can more accurately react the both sides pressure that the bearing body inner chamber is close to pressure end sealing ring 1c, can further prevent that the machine oil in the bearing body inner chamber from holding and pressing the end internal leakage to the vortex.
In the embodiment of the invention, the invention also provides an engine oil leakage prevention device for the turbocharger, which comprises a vortex end inductor 2d, a pressure end inductor 2a, a bearing body inner cavity inductor, a fan 4 and a controller 3.
The vortex end sensor 2d is used for acquiring vortex end air pressure; it should be noted that the vortex end sensor 2d may adopt an air pressure sensor in the prior art, and the specific structure thereof may refer to the air pressure sensor in the prior art, which is not described herein again. In some embodiments, the vortex end sensor 2d may be disposed at the wheel back of the turbine 1e, and in other embodiments, since the vortex end is communicated with the exhaust passage of the engine, the air pressure of the vortex end is approximately equal to the air pressure of the exhaust passage, so the vortex end sensor 2d may be disposed at any position of the exhaust passage of the engine, such as on the exhaust manifold.
The pressure end sensor 2a is used for acquiring pressure end air pressure; similarly, the end-pressure sensor 2a may be a prior art air pressure sensor. In some embodiments, the pressure end sensor 2a may be disposed at the wheel back of the impeller 1a, and in other embodiments, since the pressure end is communicated with the air intake passage of the engine, the air pressure of the pressure end is approximately equal to the air pressure of the air intake passage, therefore, the pressure end sensor 2a may also be disposed at any position of the air intake passage of the engine, such as on the air intake manifold;
the bearing body inner cavity sensor is used for acquiring the inner cavity air pressure of the bearing body 1 b; in some embodiments, the bearing body cavity sensor is disposed in the bearing body cavity, and since the bearing body cavity is in communication with the engine crankcase, the air pressure in the bearing body cavity is substantially equal to the air pressure in the engine crankcase, and thus in other embodiments, the bearing body cavity sensor may also be disposed in the engine crankcase.
The fan 4 is used for driving air in the inner cavity of the bearing body to be discharged; in some embodiments, the fan 4 may be disposed at a ventilation opening of the crankcase, when the fan 4 is turned on, air in the crankcase is exhausted through the ventilation opening, and since the crankcase is communicated with the inner cavity of the bearing body, air pressure in the inner cavity of the bearing body may be reduced;
controller 3 is connected with vortex end inductor 2d, pressure end inductor 2a, bearing body inner chamber inductor and fan 4 electricity, and controller 3 is used for: and when at least one condition of a first condition and a second condition is determined to be met, controlling to start the fan 4 communicated with the inner cavity of the bearing body so as to reduce the air pressure of the inner cavity of the bearing body, wherein the first condition is that the pressure difference between the air pressure of the vortex end and the air pressure of the inner cavity of the bearing body is lower than a first threshold value, and the second condition is that the pressure difference between the air pressure of the pressure end and the air pressure of the inner cavity of the bearing body is lower than a second threshold value.
With the arrangement, the turbocharger oil leakage prevention device provided by the embodiment of the invention can effectively prevent oil from leaking into the vortex end and the pressure end of the turbocharger 1, so that the problem of increased engine oil consumption of an engine is avoided. The derivation process of the beneficial effect is substantially similar to the derivation process of the beneficial effect brought by the method for preventing the engine oil leakage of the turbocharger, and the details are not repeated here.
In a further embodiment, the device for preventing engine oil leakage of the turbocharger further comprises an alarm module 5, the alarm module 5 is electrically connected with the controller 3, the controller 3 determines that at least one of the first condition and the second condition is met, and when the duration time of the condition meeting exceeds a preset time, the alarm module 5 is controlled to send out alarm information.
The alarm module 5 may be specifically configured as an audio alarm or an alarm light, and when the pressure difference between the vortex end air pressure and the bearing body inner cavity air pressure is lower than a first threshold and the duration time exceeds the preset time, and/or when the pressure difference between the vortex end air pressure and the bearing body inner cavity air pressure is lower than a second threshold and the duration time exceeds the preset time, the alarm module 5 sends out an alarm sound or the alarm light is turned on. The preset time can be specifically set according to actual conditions, and for example, can be specifically set to 1 minute, 2 minutes and the like.
In a further embodiment, the pressure end sensor 2a is arranged at the back of the impeller 1a, the vortex end sensor 2d is arranged at the back of the turbine 1e, the bearing body inner cavity sensor comprises a first bearing body inner cavity sensor 2c and a second bearing body inner cavity sensor 2b, the first bearing body inner cavity sensor 2c is used for acquiring the air pressure of the inner cavity of the bearing body close to the position of the vortex end sealing ring 1d, and the second bearing body inner cavity sensor 2b is used for acquiring the air pressure of the inner cavity of the bearing body close to the position of the pressure end sealing ring 1 c; the first condition is that the pressure difference between the air pressure at the back of the turbine 1e and the air pressure in the inner cavity of the bearing body close to the vortex-end sealing ring 1d is lower than a first threshold value; the second condition is that the pressure difference between the air pressure at the back of the impeller 1a and the air pressure at the position of the bearing body inner cavity close to the pressure end sealing ring 1c is lower than a second threshold value.
So set up, when the atmospheric pressure of turbine 1e back position and the atmospheric pressure that the bearing body inner chamber is close to the position of vortex end sealing ring 1d were less than first threshold value, and/or, when the atmospheric pressure of impeller 1a back position and the atmospheric pressure that the bearing body inner chamber is close to the position of pressure end sealing ring 1c were less than the second threshold value, then started the fan 4 that is linked together with the bearing body inner chamber to reduce bearing body inner chamber atmospheric pressure. The atmospheric pressure of turbine 1e back position and the atmospheric pressure that the bearing body inner chamber is close to vortex end sealing ring 1d position can feed back the both sides pressure that the bearing body inner chamber is close to vortex end sealing ring 1d more accurately, and is same, the atmospheric pressure of impeller 1a back position and the atmospheric pressure that the bearing body inner chamber is close to pressure end sealing ring 1c position can feed back the both sides pressure that the bearing body inner chamber is close to pressure end sealing ring 1c more accurately, can further prevent that the machine oil in the bearing body inner chamber from leaking to vortex end and pressure end.
The embodiment of the invention also provides an engine, which comprises a turbocharger 1 and an oil leakage prevention device, wherein the oil leakage prevention device is the oil leakage prevention device in any embodiment.
In some embodiments, the crankcase cavity of the engine is communicated with the bearing body cavity of the turbocharger 1, and the fan 4 is arranged at the ventilation opening position of the crankcase. So set up, fan 4 starts the back, not only can play bent axle ventilation radiating effect, moreover because crankcase inner chamber and bearing body inner chamber are linked together, fan 4 can provide the negative pressure for bearing body inner chamber simultaneously, and then avoids machine oil to leak to pressure end or whirlpool end.
The embodiment of the invention also provides an engineering vehicle which comprises a machine body and the engine arranged on the machine body, wherein the engine is the engine.
The engine and the engineering vehicle provided by the embodiment of the invention can effectively prevent engine oil from leaking into the vortex end and the pressure end of the turbocharger 1, thereby avoiding the problem of increased engine oil consumption of the engine. The derivation process of the beneficial effect is substantially similar to the derivation process of the beneficial effect brought by the method for preventing the engine oil leakage of the turbocharger, and the details are not repeated here.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A method for preventing oil leakage of a turbocharger, comprising:
acquiring vortex end air pressure, pressure end air pressure and bearing body inner cavity air pressure;
when at least one condition of a first condition and a second condition is determined to be met, starting a fan communicated with the inner cavity of the bearing body to reduce the air pressure of the inner cavity of the bearing body, wherein the first condition is that the pressure difference between the air pressure of the vortex end and the air pressure of the inner cavity of the bearing body is lower than a first threshold value, and the second condition is that the pressure difference between the air pressure of the pressure end and the air pressure of the inner cavity of the bearing body is lower than a second threshold value.
2. The method of claim 1, wherein it is determined that at least one of the first condition and the second condition is satisfied, and when a duration in which the condition is satisfied exceeds a preset time, a warning message is issued.
3. The method of claim 1, wherein the blower is controlled to be in a stopped state when it is determined that the first condition is not satisfied and the second condition is not satisfied.
4. The method of claim 1, wherein obtaining tip air pressure comprises: acquiring air pressure at the back of the impeller;
obtaining vortex end air pressure, comprising: acquiring air pressure at the back of the turbine;
obtain bearing body inner chamber atmospheric pressure, include: acquiring air pressure of the inner cavity of the bearing body close to the pressure end sealing ring and acquiring air pressure of the inner cavity of the bearing body close to the vortex end sealing ring;
the first condition is that the pressure difference between the air pressure at the back of the turbine and the air pressure at the position, close to the vortex-end sealing ring, of the inner cavity of the bearing body is lower than a first threshold value; and the second condition is that the pressure difference between the air pressure at the back of the impeller and the air pressure at the position, close to the pressure end sealing ring, of the inner cavity of the bearing body is lower than a second threshold value.
5. An oil leakage preventing device for a turbocharger, comprising:
the vortex end sensor is used for acquiring vortex end air pressure;
the pressure end sensor is used for acquiring the pressure of the pressure end;
the bearing body inner cavity sensor is used for acquiring the inner cavity air pressure of the bearing body;
the fan is used for driving the air in the inner cavity of the bearing body to be discharged;
the controller, with whirlpool end inductor, pressure end inductor, bearing body inner chamber inductor and the fan electricity is connected, the controller is used for: when at least one condition of a first condition and a second condition is determined to be met, controlling to start a fan communicated with the inner cavity of the bearing body so as to reduce the air pressure of the inner cavity of the bearing body, wherein the first condition is that the pressure difference between the air pressure of the vortex end and the air pressure of the inner cavity of the bearing body is lower than a first threshold value, and the second condition is that the pressure difference between the air pressure of the pressure end and the air pressure of the inner cavity of the bearing body is lower than a second threshold value.
6. The turbocharger oil leakage prevention device according to claim 5, further comprising an alarm module electrically connected to the controller, wherein the controller determines that at least one of the first condition and the second condition is satisfied, and controls the alarm module to send out alarm information when a duration of satisfaction of the condition exceeds a preset time.
7. The device of claim 5, wherein the pressure sensor is disposed at a back of the impeller, the vortex sensor is disposed at a back of the turbine, the bearing body cavity sensor comprises a first bearing body cavity sensor and a second bearing body cavity sensor, the first bearing body cavity sensor is configured to obtain air pressure in the bearing body cavity near the vortex seal ring, and the second bearing body cavity sensor is configured to obtain air pressure in the bearing body cavity near the pressure seal ring; the first condition is that the pressure difference between the air pressure at the back of the turbine and the air pressure at the position, close to the vortex-end sealing ring, of the inner cavity of the bearing body is lower than a first threshold value; and the second condition is that the pressure difference between the air pressure at the back of the impeller and the air pressure at the position, close to the pressure end sealing ring, of the inner cavity of the bearing body is lower than a second threshold value.
8. An engine comprising a turbocharger and an oil leakage prevention device according to any one of claims 5 to 7.
9. The engine of claim 8, wherein a crankcase chamber of the engine is in communication with a bearing body chamber of the turbocharger, and the fan is disposed at a vent of the crankcase.
10. A working vehicle, characterized by comprising a machine body and an engine arranged on the machine body, wherein the engine is the engine according to claim 8 or 9.
CN202111501840.2A 2021-12-09 2021-12-09 Method and device for preventing engine oil leakage of turbocharger, engine and engineering vehicle Active CN114233469B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111501840.2A CN114233469B (en) 2021-12-09 2021-12-09 Method and device for preventing engine oil leakage of turbocharger, engine and engineering vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111501840.2A CN114233469B (en) 2021-12-09 2021-12-09 Method and device for preventing engine oil leakage of turbocharger, engine and engineering vehicle

Publications (2)

Publication Number Publication Date
CN114233469A true CN114233469A (en) 2022-03-25
CN114233469B CN114233469B (en) 2023-03-28

Family

ID=80754423

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111501840.2A Active CN114233469B (en) 2021-12-09 2021-12-09 Method and device for preventing engine oil leakage of turbocharger, engine and engineering vehicle

Country Status (1)

Country Link
CN (1) CN114233469B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202255886U (en) * 2011-10-12 2012-05-30 湖南天雁机械有限责任公司 Turbocharger self-circulation low-cycle fatigue testing device
CN102777232A (en) * 2011-05-13 2012-11-14 通用汽车环球科技运作有限责任公司 Blowby flow control system for a turbocharged engine
CN105332792A (en) * 2015-10-27 2016-02-17 潍柴动力股份有限公司 Turbocharger device and control method for reducing oil leakage risk of turbocharger
CN211174333U (en) * 2019-11-21 2020-08-04 宁波威孚天力增压技术股份有限公司 Turbo charger oil leak risk assessment device
CN113266460A (en) * 2021-06-08 2021-08-17 湖南道依茨动力有限公司 Abnormality monitoring method, control device, turbocharger, and engine system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102777232A (en) * 2011-05-13 2012-11-14 通用汽车环球科技运作有限责任公司 Blowby flow control system for a turbocharged engine
CN202255886U (en) * 2011-10-12 2012-05-30 湖南天雁机械有限责任公司 Turbocharger self-circulation low-cycle fatigue testing device
CN105332792A (en) * 2015-10-27 2016-02-17 潍柴动力股份有限公司 Turbocharger device and control method for reducing oil leakage risk of turbocharger
CN211174333U (en) * 2019-11-21 2020-08-04 宁波威孚天力增压技术股份有限公司 Turbo charger oil leak risk assessment device
CN113266460A (en) * 2021-06-08 2021-08-17 湖南道依茨动力有限公司 Abnormality monitoring method, control device, turbocharger, and engine system

Also Published As

Publication number Publication date
CN114233469B (en) 2023-03-28

Similar Documents

Publication Publication Date Title
US6722129B2 (en) Crank case ventilation system
JP6741583B2 (en) How to identify compressor surge limits
US9187073B2 (en) Negative pressure forming device for brake of vehicle
JP2001289192A (en) Seal assembly
CN111224130A (en) Fuel cell and air supply system thereof
CN105649759B (en) Turbocharger protection systems
CN114233469B (en) Method and device for preventing engine oil leakage of turbocharger, engine and engineering vehicle
CN111120078B (en) Exhaust gas turbocharging control system and control method thereof
US8539936B2 (en) Supercharger rotor shaft seal pressure equalization
CN2276084Y (en) Negative pressure Roots blower
CN112282988B (en) Air filter of turbocharger of diesel engine
JP2019203505A (en) Device equipped with turbocharger for charging fuel cell
JPH05256155A (en) Electric rotary machine protective device in turbocharger for two-cycle engine
CN205172724U (en) Turbo charger compensates lubricating arrangement
CN212583814U (en) Successive supercharging system, engine assembly and vehicle
CN110578611B (en) Engine brake control system and vehicle
JP2016156300A (en) Bearing seal mechanism of mechanical supercharger for vehicle
KR100264437B1 (en) Apparatus for limiting of maximum speed of turbo charger
CN104819050A (en) Turbo intelligent protector and protection method
CN220036775U (en) Series engine supercharging system and vehicle
US11808177B1 (en) Recessed compressor wheel for turbocharger oil leakage mitigation
CN2522630Y (en) Turbo supercharger lubricating-oil sealing apparatus
CN213016540U (en) Turbocharged engine assembly
CN210135018U (en) Fuel pump assembly
CN218563940U (en) Turbo-charging fan

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant