CN206092166U - Turbo charger's undervoltage protection and high -pressure drainage device - Google Patents

Abstract

The utility model relates to a turbo charger's undervoltage protection and high -pressure drainage device, the midbody of connecting turbine and compressor including both ends respectively, set up the first gas circuit that link up midbody both ends face on the midbody, the midbody lateral part seted up with the communicating second gas circuit of first gas circuit, be located second gas circuit lateral part and has still seted up the gas pocket, second gas circuit entrance is provided with the undervoltage protection ware, gas pocket channel qi pipe is linked together with internal of compressor casing, be provided with the relief valve on the trachea. The utility model discloses can eliminate under different work condition the oil pocket and be close to the pressure differential that forms between the compressor impeller end, stop the leakage of machine oil, the protection booster, when compressor pressure is too big, can play the pressure release effect, reduce the pressure release time, raise the efficiency, realize the function that steps down and protect.

Description

A kind of under-voltage protection of turbocharger and high pressure drainage system

Technical field

The utility model is related to a kind of under-voltage protection of turbocharger and high pressure drainage system.

Background technology

Such phenomenon of the failure can be run in driving：Tail gas emits blue smoke when idling is travelled, when it is light when weight, machine oil has Consume, main cause is armature spindle and the intermediate poor sealing of turbocharger, what oil leakage was caused, when machine oil is from calming the anger When generator terminal is leaked, because compressor connection air inlet pipe, so as to machine oil is brought in engine chamber burning, machine oil quilt are participated in Consume, produce blue smog.

Following point occurs when engine oil pressure and underfed：The lubrication shortage of oil of supply axle journal and thrust bearing： To make rotor journal and bearing journal keep the lubrication shortage of oil floated；Work as high engine load, when supercharger speed is very high, Even if the confession shortage of oil of several seconds will also result in the damage to TC bearings, at the same oil leakage cause machine oil waste and Machine oil can not effectively form oil film, cause armature spindle effectively to be lubricated, and ultimately result in the damage of whole booster.

When drive when to shift gears, emergency brake, closed throttle, turbo blade, compressor impeller under effect of inertia still It is old persistently to rotate.Now because blocking for air throttle is caused with the continuation supercharging of blade, in air inlet pipeline（Air throttle and turbine it Between）Air pressure can improve rapidly, pressure needs in time step-down in compressor, can otherwise cause turbocharger impairment.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of under-voltage protection and high pressure drainage dress of turbocharger Put, prevent oil leak, realize voltage-reducing protection function.

The utility model is realized using below scheme：A kind of under-voltage protection of turbocharger and high pressure drainage system, bag The intermediate that two ends connect respectively turbine and compressor is included, the first gas of insertion intermediate both ends of the surface is offered on the intermediate Road, intermediate sidepiece offers the second gas circuit communicated with the first gas circuit, and positioned at the second gas circuit sidepiece pore is further opened with, and second Gas circuit porch is provided with pressure-failure protector, and the pore transtracheal is connected with inside compressor housings, sets on the tracheae It is equipped with relief valve.

Further, the pressure-failure protector includes the pedestal that inner chamber is communicated with the second gas circuit, and the pedestal inner chamber is opened up There is a slotted eye, the pedestal sidepiece offers the air admission hole being connected with slotted eye, and pedestal inner chamber is additionally provided with reciprocating Rubber stopper, rubber stopper is coordinated with slotted eye by reciprocating motion or separates the disconnection to realize air admission hole and the second gas circuit or connect.

Further, it is provided with airstrainer in the air admission hole；It is also associated with through slotted eye simultaneously on the rubber stopper The pull bar for stretching out, pull bar outer end is provided with back-up ring, is arranged with the pull bar and heads on back-up ring pulling rubber stopper and slotted eye The spring A of cooperation, the pedestal is additionally provided with the end cap for covering on pull bar and spring A peripheries.

Further, the relief valve includes valve body, and body cavity has reciprocating rubber piston, valve body one end The pressure release entrance communicated with body cavity is offered, valve body-side has the pressure relief vent communicated with body cavity, the pressure release Entrance transtracheal is connected with inside compressor housings, and pressure relief vent transtracheal is connected with pore, and the body cavity has Promote rubber piston towards the end motion of pressure release entrance one to block the spring B of pressure release entrance.

Compared with prior art, the utility model has the advantages that：The utility model can be eliminated in different works Condition lower oil cavitie and the pressure differential formed between compressor impeller end, prevent the leakage of machine oil, protect booster；When calming the anger When machine pressure is excessive, pressure release effect can be played, reduce venting duration, improve efficiency, realize the function of step-down protection.

To make the purpose of this utility model, technical scheme and advantage become more apparent, below will be by specific embodiment And relevant drawings, the utility model is described in further detail.

Description of the drawings

Fig. 1 is the utility model embodiment organigram；

Fig. 2 is intermediate organigram in the utility model embodiment；

Fig. 3 is pressure-failure protector closed state schematic diagram in the utility model embodiment；

Fig. 4 is pressure-failure protector suction condition schematic diagram in the utility model embodiment；

Fig. 5 is relief valve organigram in the utility model embodiment；

Label declaration in figure：1- is near turbine end, 2- oil pockets, the gas circuits of 3- first, 4- pores, 5- compressor housings, 6- gas Pipe, 7- relief valves, 8- pressure-failure protectors, the gas circuits of 9- second, 10- intermediates, 11- oil circuits, 12- are near compressor impeller end, 13- Rubber stopper, 14- air admission holes, 15- pedestals, 16- back-up rings, 17- end caps, 18- spring A, 19- pull bars, 20- airstrainers, 21- grooves Hole, 22- valve bodies, 23- rubber pistons, 24- pressure release entrances, 25- pressure relief vents, 26- spring Bs.

Specific embodiment

As shown in Fig. 1 ~ 5, a kind of under-voltage protection of turbocharger and high pressure drainage system, including two ends connect respectively whirlpool The intermediate 10 of wheel and compressor, offers the first gas circuit 3 of insertion intermediate both ends of the surface, middle side on the intermediate 10 Portion offers the second gas circuit 9 communicated with the first gas circuit 3, and positioned at the sidepiece of the second gas circuit 9 pore 4 is further opened with, and the second gas circuit 9 enters Pressure-failure protector 8 is provided with mouthful, the pore transtracheal 6 is connected with inside compressor housings 5, is arranged on the tracheae 6 There is relief valve 7.

In the present embodiment, the pressure-failure protector 8 includes the pedestal 15 that inner chamber is communicated with the second gas circuit 9, the pedestal It is connected by screw and is installed on intermediate, the inner chamber of the pedestal 15 offers a slotted eye 21, the sidepiece of the pedestal 15 is offered The air admission hole 14 being connected with slotted eye 21, the inner chamber of pedestal 15 is additionally provided with reciprocating rubber stopper 13, and rubber stopper 13 passes through Reciprocating motion coordinates with slotted eye 21 or separates the disconnection to realize air admission hole 14 and the second gas circuit 9 or connects；When near compressor When negative pressure occurs in impeller end 12, can overcome the spring A of pressure-failure protector device is moved to the left rubber stopper 13, so as to empty with the external world Gas phase is led to, and prevents to form pressure differential with lubricating oil oil pocket 2 near compressor impeller end, prevents oil leak.

In the present embodiment, airstrainer 20 is provided with the air admission hole 14, to prevent impurity from entering system, is prevented The impeller of supercharger air compressor is damaged, it is ensured that booster reliability of operation；It is also associated with through slotted eye on the rubber stopper 13 And the pull bar 19 for stretching out, the outer end of pull bar 19 is provided with back-up ring 16, is arranged with the pull bar 19 and heads on back-up ring 16 and pull The spring A18 that rubber stopper coordinates with slotted eye, the pedestal 15 is additionally provided with the end cap 17 for covering on pull bar 19 and spring A18 peripheries.

In the present embodiment, the relief valve includes valve body 22, and the inner chamber of valve body 22 has reciprocating rubber piston 23, the one end of valve body 22 offers the pressure release entrance 24 communicated with the inner chamber of valve body 22, and the sidepiece of valve body 22 has and the inner chamber phase of valve body 22 Logical pressure relief vent 25, the pressure release entrance transtracheal is connected with inside compressor housings, pressure relief vent transtracheal and pore It is connected, the inner chamber of the valve body 22 has and promotes rubber piston towards the end motion of pressure release entrance one to block the spring of pressure release entrance 24 B26, when the certain threshold value of compressor housings air pressure inside superelevation, when overcoming the spring of relief valve, relief valve is opened, compressor high pressure Air-flow reaches the effect of protection supercharger systems to turbine end pressure release, reduces venting duration, improves efficiency.

The under-voltage protection of the utility model turbocharger and the course of work of high pressure drainage system are：

（1）When engine is in long-time idling operation, because now engine is in natural aspiration state, in cylinder Piston from top dead centre toward lower dead center move when, equivalent to being outwardly evacuated, go out to be formed certain true near compressor impeller end 12 Reciprocal of duty cycle（Air pressure is less than an atmospheric pressure, but air pressure is more than 0 Pa）, this operating mode long-play, the lubricating oil oil pressure of oil pocket 5 is for just Pressure（Usually 2 ~ 5 atmospheric pressure）, this just forms pressure differential and can then cause oil leakage；Near compressor impeller end 12 with The formation pressure differential of lubricating oil oil pocket 2, the pressure differential of formation is acted on pressure-failure protector by the first gas circuit and the second gas circuit, Make pressure-failure protector open air-breathing, make to be connected with outside air near compressor impeller end 12, eliminate negative pressure.

When high engine speeds running on the lower load, such as descending on gear, unclamps throttle, and engine towing astern is now leaned on Nearly compressor impeller end 12 is negative pressure（Air pressure is less than 0Pa）, and oil pump flow pressure is directly proportional with engine speed, rotating speed Increase necessarily cause lubricating oil oil pressure to raise, and with form bigger pressure differential near compressor impeller end 12, the pressure for being formed Power difference is acted on pressure-failure protector by the first gas circuit and the second gas circuit, makes to connect with outside air near compressor impeller end 12 It is logical, eliminate pressure differential.

When drive when to shift gears or emergency brake, closed throttle, turbo blade, compressor impeller under effect of inertia still It is old persistently to rotate, now because blocking for air throttle causes air inlet pipeline with the continuation supercharging of blade（Between air throttle and turbine） Air pressure improve rapidly, when in compressor casing body air pressure exceed certain threshold value when, overcome the bullet of the spring B in relief valve Power, pressure release entrance is connected with pressure relief vent, excessive gas is caused turbine end 25 from compressor housings and is discharged in ambient atmosphere （Now pressure-failure protector 7 is in closed state）, realize step-down protection function, this with by air inlet by-passing valve control turbine enter The aperture of gas port carrys out pressure release phase same-action, so as to reduce venting duration, improves efficiency, realizes the function of step-down protection.

Above-listed preferred embodiment, is further described to the purpose of this utility model, technical scheme and advantage, Should be understood that and the foregoing is only preferred embodiment of the present utility model, it is all not to limit the utility model Within spirit of the present utility model and principle, any modification, equivalent substitution and improvements made etc. should be included in this practicality Within new protection domain.

Claims (4)

1. a kind of under-voltage protection of turbocharger and high pressure drainage system, including two ends connect respectively in turbine and compressor Mesosome, it is characterised in that：The first gas circuit of insertion intermediate both ends of the surface is offered on the intermediate, intermediate sidepiece is offered The second gas circuit communicated with the first gas circuit, positioned at the second gas circuit sidepiece pore is further opened with, and the second gas circuit porch is provided with deficient Pressure protector, the pore transtracheal is connected with inside compressor housings, and on the tracheae relief valve is provided with.

2. the under-voltage protection of turbocharger according to claim 1 and high pressure drainage system, it is characterised in that：It is described to owe Pressure protector includes the pedestal that inner chamber is communicated with the second gas circuit, and the pedestal inner chamber offers a slotted eye, and the pedestal sidepiece is opened The air admission hole being connected with slotted eye is provided with, pedestal inner chamber is additionally provided with reciprocating rubber stopper, and rubber stopper is by reciprocal fortune It is dynamic to coordinate with slotted eye or separate the disconnection to realize air admission hole and the second gas circuit or connect.

3. the under-voltage protection of turbocharger according to claim 2 and high pressure drainage system, it is characterised in that：It is described enter Airstrainer is provided with pore；The pull bar for being also associated with the rubber stopper through slotted eye and stretching out, pull bar outer end Portion is provided with back-up ring, is arranged with the pull bar and heads on the spring A that back-up ring pulls rubber stopper to coordinate with slotted eye, and the pedestal also sets There is the end cap for covering on pull bar and spring A peripheries.

4. the under-voltage protection of turbocharger according to claim 1 and high pressure drainage system, it is characterised in that：It is described to let out Pressure valve includes valve body, and body cavity has reciprocating rubber piston, and valve body one end offers what is communicated with body cavity Pressure release entrance, valve body-side has the pressure relief vent communicated with body cavity, the pressure release entrance transtracheal and compressor housings Inside is connected, and pressure relief vent transtracheal is connected with pore, and the body cavity has promotion rubber piston towards pressure release entrance One end motion is blocking the spring B of pressure release entrance.