CN104594961B - The compressor end of a kind of turbocharger seals structure - Google Patents
The compressor end of a kind of turbocharger seals structure Download PDFInfo
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- CN104594961B CN104594961B CN201410168577.3A CN201410168577A CN104594961B CN 104594961 B CN104594961 B CN 104594961B CN 201410168577 A CN201410168577 A CN 201410168577A CN 104594961 B CN104594961 B CN 104594961B
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Abstract
The invention discloses the compressor end of a kind of turbocharger and seal structure, compressor end seals structure and includes back of the body dish or oil sealing cap, axle big envelope, and the middle part of back of the body dish or oil sealing cap is provided with the cylindrical body matched with axle big envelope; Back of the body dish is provided with dam, the direction of oil circuit formed between dam and axle big envelope be axially into. Dam annular is arranged at the outer rounded ends of cylindrical body and forms oil return groove on cylindrical, and the outer rim of axle big envelope is provided with gets rid of oil structure. The present invention is not only simple in structure, cost is low, sealing is strong, and anti-leakage of oil ability is strong. Specifically, oil return groove on back of the body dish (monoblock type) or oil sealing cap (split type), dam are effectively cut off and stop that the machine oil that has pressure when supercharger works is to the flowing of gap inlet, and the machine oil gathered when getting rid of oil structure by work that the axle big envelope of high speed rotating is arranged on it is centrifugal throws away, effectively stop the lubricating oil entrance from gap.
Description
Technical field
The present invention relates to a kind of turbocharger, the compressor end particularly relating to a kind of turbocharger seals structure.
Background technology
Internal combustion engine is the mobile dynamic power machine that thermal effect that the current mankind can grasp is the highest, it meets the demand of various supporting machinery with excellent dynamic property, reliability, economy, the feature of environmental protection, be widely used in supporting the use of industrial or agricultural, road/vessel traffic transport, geology/oil drilling, generating and national defence special type power, for the capital construction of China, transportation, industrial or agricultural and the modernization of national defense and promotion and promote economic development, the aspect such as uplift the people's living standard plays huge effect.
Reinforcement along with the in short supply and environmental conservation of international petroleum class resource; internal combustion engine is efficient, energy-conservation, low emission becomes now or even the main target of Future Development; and internal combustion engine adopts refrigeration technique in turbocharging to be one of its maximally efficient and requisite important means, it is more and more universal as standard configuration that the compressor end of turbocharger seals structure.
The compressor end of existing turbocharger seals the operation principle of structure: booster turbine absorbs the exhaust energy (high-temperature fuel gas, pulsed pressure wave, high-speed fuel gas are in the expansion of turbine channel) of electromotor and runs up, coaxial compressor impeller is driven to do work, suck and compress fresh air and send into engine chamber, promote that air-fuel mixture burns completely, and then more powerful power is exported when not changing electromotor volume, weight, save fuel oil reduction and discharge pollutants;The compressor end of turbocharger seals structure and relies only on the turbine shaft of the pressure lubrication oil input TC bearings body hydrodynamic lubrication of since engine main oil gallery offer, carrying, cooling high speed rotating, transitive relation due to supercharger and electromotor only oil, gas, without any Mechanical Driven, the power of its not consumption of engine.
The problem that the compressor end of existing turbocharger seals structure in use maximum is exactly leakage of oil, and the leakage permeability of compressor end relatively seriously enjoys the concern of people. the mechanism of supercharger leakage of oil is: first, the compressor end of turbocharger seals structure after engine startup operation, when idle operating mode, owing to electromotor does not load load, exhaust energy is limited, the speed driving supercharger operating is very low, it is not enough so that supercharger normally plays adherence pressure and increases the effect of density of the induced air, and the now reciprocating motion of engine piston really makes air inlet pipeline form negative pressure, such supercharger air compressor end is at negative pressure state, if long-time so idling work, when negative pressure more than supercharger air compressor end seal resistance that structure produces will in sucking-off bearing body lubricating oil and occur--the roof leaking of anti-negative pressure scarce capacity. the second, when electromotor enters normal operating conditions on-load rotating speed, pressure lubrication oil enters after the turbine shaft of TC bearings body hydrodynamic lubrication, carrying, cooling high speed rotating by gravity reflux, requirement due to fuel delivery, lubricating oil is bound to assemble and have certain pressure in oil pocket, and first oil thrown away by the gap location cooperatively formed at each parts by the part moved, secondly like labyrinth, sealing structure cooperates and prevents the seepage of lubricating oil, several typical supercharger structure layouts from current home and abroad, supercharger air compressor structural design be back of the body dish (monoblock type) or oil sealing cap (split type) and axle big envelope coordinate single order seal (radially into, directly axially stream arrives sealing ring place), gap is radial arrangement, when the lubricating oil thrust bearing in bearing body of supercharger air compressor end and the gap with axle big envelope spray, through oil back chamber by gravity oil return, this makes supercharger when handing over variable working condition, radial gap (has width to limit) in design have the change of width, the lubricating oil do not thrown away is made to have pumping to be pressed into the possibility in gap, when the leakage of oil that will produce supercharger more than sealing ring after the resistance that the lubricating oil entered by suction pressure is constituted under the effect of pumping pressure, and oil return smooth time leakage of oil probability will be significantly increased, here it is often there is the reason of leakage permeability when supercharger runs up.
Summary of the invention
The technical problem to be solved in the present invention is to provide the compressor end of a kind of turbocharger and seals structure, to overcome turbocharger in prior art to have the defect of leakage permeability when running up.
For reaching above-mentioned purpose, the present invention provides the compressor end of a kind of turbocharger to seal structure, and described compressor end seals structure and includes back of the body dish or oil sealing cap, axle big envelope, and the middle part of described back of the body dish or oil sealing cap is provided with the cylindrical body matched with axle big envelope; Described back of the body dish or oil sealing cap are provided with dam, the direction of oil circuit formed between described dam and axle big envelope be axially into. Described dam annular is arranged at the outer rounded ends of described cylindrical body and forms oil return groove on described cylindrical, the outer rim of described axle big envelope is provided with gets rid of oil structure, described oil structure of getting rid of includes the first ladder, the second ladder, is provided with gets rid of oil groove at described first ladder and the second ladder junction;Described axle big envelope and back of the body dish or oil sealing cap assemble the position formed and the sealing labyrinth of gap composition " Z " font.
Wherein, described in get rid of oil structure include the first ladder, the second ladder, described first ladder and the second ladder junction be provided with get rid of oil half slot.
Wherein, described in get rid of oil structure and include the first ladder, the second ladder, described first ladder and the second ladder do not set and get rid of oil groove, but connect relative to axially oil oblique angle transition of getting rid of for acute angle by one.
Wherein, described in get rid of oil structure include the first ladder, the second ladder, described first ladder and the second ladder junction be provided with get rid of oil square groove.
Compared with prior art, the invention has the beneficial effects as follows be not only simple in structure, cost is low, sealing is strong, and can effectively stop compressor end lubricating oil to ooze from the leakage of pressure side fit clearance when supercharger works, also can effectively promote supercharger ability of anti-negative pressure leakage of oil when engine idle operation simultaneously. Specifically, oil return groove on back of the body dish (monoblock type) or oil sealing cap (split type), dam are effectively cut off and stop that the machine oil that has pressure when supercharger works is to the flowing of gap inlet, and the machine oil gathered when getting rid of oil structure by work that the axle big envelope of high speed rotating is arranged on it is centrifugal throws away, effectively stop the lubricating oil entrance from gap.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of turbocharger in prior art (monoblock type);
Fig. 2 is the partial enlargement structural representation that in Fig. 1, compressor end seals structure;
Fig. 3 is the sectional structure schematic diagram of turbocharger in prior art (split type);
Fig. 4 is the partial enlargement structural representation that in Fig. 3, compressor end seals structure;
Fig. 5 is the sectional structure schematic diagram of turbocharger of the present invention (monoblock type);
Fig. 6 is the partial enlargement structural representation that in Fig. 5, compressor end seals structure;
Fig. 7 is the first the sectional structure schematic diagram after back of the body dish of the present invention coordinates with axle big envelope;
Fig. 8 is the second sectional structure schematic diagram after back of the body dish of the present invention coordinates with axle big envelope;
Fig. 9 is the sectional structure schematic diagram of turbocharger of the present invention (split type);
Figure 10 is the partial enlargement structural representation that in Fig. 9, compressor end seals structure;
Figure 11 is the first the sectional structure schematic diagram after oil sealing cap of the present invention coordinates with axle big envelope;
Figure 12 is the second sectional structure schematic diagram after oil sealing cap of the present invention coordinates with axle big envelope.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail. Following example are used for illustrating the present invention, but are not limited to the scope of the present invention.
In prior art, turbocharger (monoblock type) is as shown in Figure 1, 2, including compressor end and intake and exhaust regulation and control system 004. Compressor end 001 seal structure for loading onto floating bearing 024, floating bearing back-up ring 020, turbine shaft 025, thrust plate 07, thrust bearing 08, spacer sleeve 06, grease baffle 016 constitute bearing body, pressure side sealing ring 04 is loaded onto axle big envelope 03 reinstall the assembly constituted in the hole of back of the body dish 012 and load in turbine shaft 025, be connected with bearing body with four sunk screws 09 and fasten. Above-mentioned compressor end seals structure and is further equipped with: compressor impeller 01, locking nut 02, sealing ring 013, compressor volute 05, pressure side pressing plate 014, bolt 015, turbine box 023, whirlpool end sealing ring 022, heat shield 021, whirlpool end clamp plate 019, alignment pin 017, resistance to thermal screw 018 constitute complete turbocharger.
In prior art, turbocharger (split type) is as shown in Figure 3,4, and supercharger moving component includes turbine shaft assembly, turbine shaft assembly by: turbine shaft 21, thrust plate 13, axle big envelope 12, impeller 3, locking nut 2 combine; Turbine utilizes high temperature that electromotor discharges, high-speed exhaust gas to drive and run up, and drives coaxial compressor impeller 3 synchronous high-speed to operate, and sucks and compresses fresh air and is input in motor intake manifold; And intermediate 15 utilizes oil inlet passage thereon (including oil-in 22, oil return opening 23), the electromotor lubricating oil that comes of input is delivered to the both sides of floating bearing 17, stop collar 16 inside and outside circle and thrust bearing 11, is used for supporting, lubricates, cool down turbine shaft high speed, steady operation;
Turbine box 20, whirlpool end nut 14, heat shield 18, intermediate 15, whirlpool end sealing ring 19 are constituted the gas circuit of whirlpool end and oil circuit and are separated by whirlpool end sealing ring 19; Equally, pressure shell 1, pressure side nut 10, pressing plate 9, sunk screw 5, sealing ring 7, O RunddichtringO 8, impeller 3, intermediate 15, oil sealing cap 6, axle big envelope 12, pressure side sealing ring 4 and thrust plate 13, thrust bearing 11 are constituted the gas circuit of pressure side and oil circuit and are kept apart by pressure side sealing ring 4; Thus ensureing relatively independent, the reliably working of each several part.
Embodiment one:
As shown in Fig. 5,6,7, the present embodiment is essentially identical with turbocharger (monoblock type) in prior art, institute the difference is that, described compressor end 0001 includes back of the body dish 0012, axle big envelope 003, and the middle part 1.4 of described back of the body dish 0012 is provided with the cylindrical body 1.5 matched with axle big envelope 003; Dam 1.6 annular is arranged at cylindrical 1.7 end of described cylindrical body 1.5 and forms oil return groove 1.8 on described cylindrical, on back of the body dish 1.2 arrange oil return groove, dam can be casting composition can also be constituted by machining, and the oil partition tank that oil return groove 1.8 is identical with implication, oil interceptor are equivalent, oil protection wall, oil scraper ring that dam 1.6 is identical with implication are equal to. The outer rim 1.9 of described axle big envelope 003 is provided with gets rid of oil structure 2.0. Described oil structure 2.0 of getting rid of includes first ladder the 2.1, second ladder 2.2, is provided with at described first ladder 2.1 and the second ladder 2.2 junction and gets rid of oil square groove 2.3. Design has the axle big envelope getting rid of oil structure 2.0, is contained in design as assembly and makes in the back of the body dish mider hole having oil return groove and dam after loading onto pressure side sealing ring 04, then is contained on the bearing body of equipped good turbine shaft 025 with sunk screw 09; Axle big envelope and back of the body dish assemble the position formed and the sealing labyrinth of gap composition " Z " font 1.1.
The operation principle of the present embodiment is as follows: on the back of the body dish constituting oil back chamber, one dam of design is to form oil return groove, on axle big envelope, oil structure is got rid of in design, the fit clearance place of axle big envelope and back of the body dish it is directly entered by the oil return groove on back of the body dish, dam isolation lubricating oil, and " Z " font gap of the rigging position of dam and axle big envelope and composition constitutes second order and seals, change the flow path of Lou permeability simultaneously, by oil by be radially directly entered change into axially into, constitute second order seal; And cover dam and reach back of the body dish with axle big envelope fit clearance (without design width limit value, wider than existing structure, eliminating the Axial changes impact on it) lubricating oil at place got rid of that oil structure high-speed is centrifugal to be thrown away on the axle big envelope of high speed rotating again, lubricating oil in such oil back chamber is through deadweight oil return, can being substantially reduced the probability of Lou permeability, the size in " Z " font gap simultaneously controlled well also can improve the ability of the supercharger anti-negative pressure leakage of oil of compressor end under idling operation.
Oil structure 2.0 of getting rid of in the present embodiment one is not limited to said structure, this gets rid of oil structure and may be arranged as shown in Figure 8, described oil structure of getting rid of includes first ladder the 2.4, second ladder 2.5, gets rid of oil oblique angle 2.6 transition by one and connect between described first ladder and the second ladder.
In the present embodiment one get rid of oil structure be not limited to said structure, described in get rid of oil structure include the first ladder, the second ladder, described first ladder and the second ladder junction be provided with get rid of oil half slot.
Embodiment two:
As shown in Fig. 9,10,11, the present embodiment is essentially identical with turbocharger (split type) in prior art, institute the difference is that, described compressor end seals structure and includes oil sealing cap 006, axle big envelope 0012, and the middle part 1.11 of described oil sealing cap is provided with the cylindrical body 1.12 matched with axle big envelope; Dam 1.13 annular is arranged at cylindrical 1.14 end of described cylindrical body and forms oil return groove 1.15 on described cylindrical 1.14, on oil sealing cap arrange oil return groove, dam can be casting composition can also be constituted by machining, and the oil partition tank that oil return groove 1.15 is identical with implication, oil interceptor are equivalent, oil protection wall, oil scraper ring that dam 1.13 is identical with implication are equal to. The outer rim 1.16 of described axle big envelope is provided with gets rid of oil structure 1.17. Described oil structure of getting rid of includes first ladder the 1.18, second ladder 1.19, is provided with at described first ladder and the second ladder junction and gets rid of oil square groove 1.20. Design has the axle big envelope getting rid of oil structure, is contained in design as assembly and makes in the oil sealing cap mider hole having oil return groove and dam after loading onto pressure side sealing ring 4, then is contained on the bearing body of equipped good turbine shaft 21 with sunk screw 5; Axle big envelope and oil sealing cap assemble the position formed and the sealing labyrinth of gap composition " Z " font 1.21.
The operation principle of the present embodiment is as follows: on the oil sealing cap constituting oil back chamber, one dam of design is to form oil return groove, on axle big envelope, oil structure is got rid of in design, the fit clearance place of axle big envelope and oil sealing cap it is directly entered by the oil return groove on oil sealing cap, dam isolation lubricating oil, and " Z " font gap of the rigging position of dam and axle big envelope and composition constitutes second order and seals, change the flow path of Lou permeability simultaneously, by oil by be radially directly entered change into axially into, constitute second order seal; And cover dam and reach oil sealing cap with axle big envelope fit clearance (without design width limit value, wider than existing structure, eliminating the Axial changes impact on it) lubricating oil at place got rid of that oil structure high-speed is centrifugal to be thrown away on the axle big envelope of high speed rotating again, lubricating oil in such oil back chamber is through deadweight oil return, can being substantially reduced the probability of Lou permeability, the size in " Z " font gap simultaneously controlled well also can improve the ability of the supercharger anti-negative pressure leakage of oil of compressor end under idling operation.
Oil structure 1.17 of getting rid of in the present embodiment two is not limited to said structure, this gets rid of oil structure and may be arranged as shown in figure 12, described oil structure of getting rid of includes first ladder the 100, second ladder 200, gets rid of oil oblique angle 300 transition by one and connect between described first ladder and the second ladder.
In the present embodiment two get rid of oil structure be not limited to said structure, described in get rid of oil structure include the first ladder, the second ladder, described first ladder and the second ladder junction be provided with get rid of oil half slot.
Compressor end of the present invention seals structure, internal oil pocket local every, hinder, get rid of oil structure, by above-mentioned design, throw the lubricating oil being pooled to fit-up gap place to greatest extent away, effectively guide the flow direction of lubricating oil, cut off and change the path of oil leak, increase labyrinth seal progression and improve the ability stoping oil leak oil.So be not only simple in structure, cost is low, sealing is strong, and can effectively stop compressor end lubricating oil to ooze from the leakage of pressure side fit clearance when supercharger works, and simultaneously also can effectively promote supercharger ability of anti-negative pressure leakage of oil when engine idle operation. Specifically, oil return groove on back of the body dish (monoblock type) or oil sealing cap (split type), dam are effectively cut off and stop that the machine oil that has pressure when supercharger works is to the flowing of gap inlet, and the machine oil gathered when getting rid of oil structure by work that the axle big envelope of high speed rotating is arranged on it is centrifugal throws away, effectively stop the lubricating oil entrance from gap.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the technology of the present invention principle; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (4)
1. the compressor end of a turbocharger seals structure, described compressor end seals structure and includes back of the body dish or oil sealing cap, axle big envelope, the middle part of described back of the body dish or oil sealing cap is provided with the cylindrical body matched with axle big envelope, it is characterized in that: described back of the body dish or oil sealing cap are provided with dam, the direction of oil circuit formed between described dam and axle big envelope be axially into, described dam annular is arranged at the outer rounded ends of described cylindrical body and forms oil return groove on described cylindrical, the outer rim of described axle big envelope is provided with gets rid of oil structure, described oil structure of getting rid of includes the first ladder, second ladder, it is provided with gets rid of oil groove at described first ladder and the second ladder junction, described axle big envelope and back of the body dish or oil sealing cap assemble the position formed and the sealing labyrinth of gap composition " Z " font.
2. turbocharger according to claim 1 compressor end seal structure, it is characterised in that: described in get rid of oil structure include the first ladder, the second ladder, described first ladder and the second ladder junction be provided with get rid of oil half slot.
3. the compressor end of turbocharger according to claim 1 seals structure, it is characterized in that: described in get rid of oil structure include the first ladder, the second ladder, do not set between described first ladder and the second ladder and get rid of oil groove, but connect relative to the oil oblique angle transition of getting rid of being axially acute angle by one.
4. turbocharger according to claim 1 compressor end seal structure, it is characterised in that: described in get rid of oil structure include the first ladder, the second ladder, described first ladder and the second ladder junction be provided with get rid of oil square groove.
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| CN201410168577.3A CN104594961B (en) | 2014-04-24 | 2014-04-24 | The compressor end of a kind of turbocharger seals structure |
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| CN201410168577.3A CN104594961B (en) | 2014-04-24 | 2014-04-24 | The compressor end of a kind of turbocharger seals structure |
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| CN104594961B true CN104594961B (en) | 2016-06-15 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102017202687A1 (en) * | 2017-02-20 | 2018-08-23 | BMTS Technology GmbH & Co. KG | Bearing housing and a Abgasturoblader with such a housing |
| CN109026361A (en) * | 2018-09-18 | 2018-12-18 | 湖南天雁机械有限责任公司 | A kind of New type gland cover used in turbocharger |
| JP7317596B2 (en) * | 2019-06-28 | 2023-07-31 | 新明和工業株式会社 | Guidance device, mechanical parking equipment, and guidance method |
| CN112922721B (en) * | 2021-04-09 | 2022-08-05 | 常州市佳科汽车零部件有限公司 | Timely response turbocharger for automobile engine |
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| EP2066886B1 (en) * | 2006-09-29 | 2013-05-15 | BorgWarner Inc. | Sealing system between bearing and compressor housing |
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| CN200955435Y (en) * | 2006-09-18 | 2007-10-03 | 江津增压器厂 | Anti-oil-leakage device for air-compression end of vehicle pressure booster |
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Effective date of registration: 20210830 Address after: 315800 No. 18, Tianlongshan Road, Daqi, Beilun, Ningbo, Zhejiang Patentee after: Ningbo moduo import and Export Co.,Ltd. Address before: 315804 c10-9f, No. 299, Guanghua Road, high tech Zone, Ningbo, Zhejiang Patentee before: NINGBO MODO AUTO PARTS Co.,Ltd. |