Intermediate of variable cross-section turbocharger for vehicle
Technical Field
The utility model relates to an automobile engine technical field particularly, relates to an automobile-used variable cross section turbo charger's midbody.
Background
At present, many automobiles adopt engines with a turbocharger structure, the turbocharger is actually an air compressor, the turbine in a turbine chamber is pushed by the inertia force of exhaust gas discharged by the engine, the turbine drives a coaxial impeller, and the impeller pumps air sent by an air filter pipeline to enable the air to enter an air cylinder in a pressurized mode. The turbocharger comprises an intermediate body and a turbine assembly, wherein the intermediate body is connected with the turbine assembly through a turbine end flange arranged on the intermediate body, and a turbine shaft rotates at a high speed, so that the turbine end flange at the joint can generate high temperature, the temperature of the turbine end flange is too high, the problem that the turbine end flange cracks due to high temperature is solved, and engine oil is carbonized, so that an oil passage is blocked. In order to cool down the turbine end flange, the existing method is as follows: the cooling water channel with a closed annular structure is formed in the intermediate body, the water inlet channel and the water outlet channel which are respectively communicated with the annular water channel are arranged on the intermediate body, the water inlet channel and the water outlet channel are respectively communicated with any position of the cooling water channel, then the water inlet channel and the water outlet channel are communicated with a cooling water pipe of an engine, and the cooling water flows in the annular water channel to realize the integral cooling of the turbine end flange. However, the cooling water channel that is the closed loop configuration among the prior art still can the holistic cooling effect of turbine end flange, nevertheless is not good to the cooling effect of turbine end flange through-hole department, and the reason lies in: as the process needs, a rocker arm bushing is arranged in a through hole of the turbine end flange, and a rocker arm is rotatably connected on the rocker arm bushing; when the rocker arm swings back and forth at a high speed, the temperature of the turbine end flange positioned in the peripheral area of the through hole is higher than that of other positions of the turbine end flange; because the cooling water channel among the prior art is the annular structure of remaining silent, the cooling water that gets into in the cooling water channel via the inlet channel has two flow directions and flows through the outlet channel in the cooling water channel, this just leads to when the cooling water flows in the cooling water channel among the prior art, only partial cooling water flows through the cooling water channel of through-hole near region, there is partial cooling water not to flow through the reposition of redundant personnel problem of the cooling water channel of through-hole near region, this just makes the cooling water to the cooling effect greatly reduced of the turbine end flange of through-hole department, and then leads to current cooling water channel that is the annular structure of remaining silent can not solve the high temperature problem of turbine end flange in the through-hole peripheral region well, this leads to turbine end flange to appear often because of the phenomenon of high temperature fracture in the peripheral region position of through-hole, greatly shortened turbine end flange's life.
Therefore, how to optimize the structure of the intermediate body of the turbocharger to solve the problem of high temperature of the turbine end flange in the peripheral area of the through hole has been a technical problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem be: the defects in the prior art are overcome, and the cooling water channel with the optimized structure is provided, so that the intermediate body of the vehicle variable cross-section turbocharger with the turbine end flange can enable the peripheral area of the through hole to have a better cooling effect.
In order to solve the problems, the utility model provides an intermediate body of a variable cross-section turbocharger for a vehicle, which comprises an intermediate body, a turbine end flange connected on the intermediate body, and a cooling water channel which is arranged inside the intermediate body and is annular as a whole; a through hole for connecting the rocker arm bushing is formed in the turbine end flange; the top of the cooling water channel extends towards the direction of the turbine end flange and extends into the turbine end flange; the cooling water channel is of an open annular structure, and two open ends of the cooling water channel are respectively communicated with a water inlet channel and a water outlet channel and used for enabling cooling water flowing into the cooling water channel from the water inlet channel to flow along the cooling water channel and flow out from the water outlet channel.
Compared with the prior art, the utility model, useful part lies in: the utility model optimizes the structure of the cooling water channel in the prior art, optimizes the closed annular structure of the cooling water channel in the prior structure into an open annular structure, and when the optimized cooling water channel is used for cooling the turbine end flange, the cooling water flowing into the cooling water channel through the water inlet channel flows in the cooling water channel and flows out of the water outlet channel, and the cooling water completely flows through the cooling water channel near the through hole in the cooling water channel; the problem of shunting that part of cooling water does not flow through the cooling water channel in the area near the through hole when the cooling water flows in the cooling water channel in the prior art does not exist; therefore, when cooling water flows in the cooling water channel, the cooling water must flow through the area near the through hole, and the turbine end flange in the area near the through hole has better cooling effect.
As a modification, a blocking part is arranged between two open ends of the cooling water channel, the width of the blocking part is 4 mm-10 mm, and preferably, the width of the blocking part is 4mm. The arrangement of the blocking part ensures that the cooling water flowing into the cooling water channel does not flow from one open end to the other open end between the two open ends of the cooling water channel, so that the problem of shunting of part of the cooling water which does not flow through the cooling water channel in the area near the through hole is caused; meanwhile, the width of the blocking part is reduced as much as possible, and the cooling effect of the turbine end flange in the area near the blocking part can be ensured.
As an improvement, the through hole is close to the cooling water channel on one side of the cooling water channel, and the through hole is far away from the water inlet channel and the water outlet channel. After the structure is applied, the through hole is arranged close to the cooling water channel, so that the turbine end flange in the area near the through hole can obtain a better cooling effect; the through hole is far away from the structures of the water inlet channel and the water outlet channel, and the rocker arm bushing is conveniently connected in the through hole.
As an improvement, the cooling water channel comprises a C-shaped area with a C-shaped longitudinal section; the barrier part is formed between two end parts of the C-shaped area; the water inlet channel and the water outlet channel are respectively communicated with two ends of the C-shaped area. The structure can ensure that the cooling water channel has larger volume, and ensures that the flow of cooling water in the cooling water channel is larger and the detention time is longer, thereby ensuring that the turbine end flange obtains better cooling effect; meanwhile, the cooling water channel with the longitudinal section in the C-shaped structure is easier to realize in the process.
As an improvement, the cooling water channel comprises a first expanded cavity and a second expanded cavity which are respectively communicated with the main body of the C-shaped area; the first expansion cavity and the second expansion cavity are positioned on two sides of the through hole, and the communication section of the first expansion cavity and the second expansion cavity is positioned on the main body of the C-shaped area; the first capacity expansion cavity, the communicating section and the second capacity expansion cavity jointly form a semi-annular structure extending along the circumferential direction of the through hole. After the structure is applied, the volume of the cooling water channel can be enlarged through the first diffusion cavity and the second diffusion cavity, so that the flow of cooling water in the cooling water channel in the area near the through hole is ensured to be larger, and the turbine end flange in the area near the through hole can obtain a better cooling effect; meanwhile, the structure can provide an avoiding space for the arrangement of the through holes, and the process requirements are met.
As an improvement, the cooling water channel comprises a third expansion cavity which is communicated with one end of the C-shaped area and extends towards the water inlet channel; the third expanded cavity is positioned at the oblique lower part of one end of the C-shaped area and is communicated with the water inlet channel. The third diffusion cavity can be used for expanding the volume of the cooling water channel and ensuring that the flow of cooling water in the cooling water channel is larger, so that the turbine end flange can obtain a better cooling effect.
As an improvement, the cooling water channel also comprises a fourth expansion cavity which is communicated with the other end of the C-shaped area and extends towards the water outlet channel; the fourth expanded cavity is positioned obliquely below the other end of the C-shaped area and is communicated with the water outlet channel. The volume of the cooling water channel can be enlarged due to the arrangement of the fourth expansion cavity, and the flow of cooling water in the cooling water channel is ensured to be larger, so that the turbine end flange can obtain a better cooling effect.
As an improvement, a clearance groove is formed in the side wall of the intermediate body below the through hole. The arrangement of the clearance groove is that a rocker arm bushing is arranged in the through hole, and a space is provided for the rocker arm bushing to be rotatably connected with the rocker arm.
As an improvement, the side wall of the intermediate body is also provided with a process hole communicated with the cooling water channel, and a water plug used for sealing the process hole is connected in the process hole. The arrangement of the fabrication holes ensures that the cooling water channel is easier to process and manufacture in the intermediate body; after the process hole is sealed by the water plug, the cooling water in the cooling water channel is ensured not to flow out through the process hole, and the cooling effect of the turbine end flange is ensured not to be influenced.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
fig. 4 is a perspective view of the present invention;
fig. 5 is a schematic structural view of the turbine end flange of the present invention.
Description of reference numerals:
1. an intermediate body; 10. an empty avoiding groove; 11. a fabrication hole; 12. a water plug; 2. a turbine end flange; 20. a through hole; 3. a cooling water channel; 30. a C-shaped region; 31. a first expanded cavity; 310. a communicating section; 32. a second expanded cavity; 33. a third expanded cavity; 34. a fourth expansion cavity; 4. a water inlet channel; 5. a water outlet channel; 6. a blocking part.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1 to 5, in the present invention, the intermediate body of the variable cross-section turbocharger for a vehicle includes an intermediate body 1, a turbine end flange 2 connected to the intermediate body 1, and a cooling water channel 3 disposed inside the intermediate body 1 and having an annular shape as a whole; the turbine end flange 2 is provided with a through hole 20 for connecting the rocker arm bushing; the top of the cooling water channel 3 extends towards the direction of the turbine end flange 2 and extends into the turbine end flange 2; the cooling water channel 3 is of an open annular structure, and two open ends of the cooling water channel 3 are respectively communicated with a water inlet channel 4 and a water outlet channel 5, and are used for enabling cooling water flowing into the cooling water channel 3 from the water inlet channel 4 to flow along the cooling water channel 3 and flow out from the water outlet channel 5.
As shown in fig. 4 and 5, the turbine end flange 2 is integrally formed on the top of the intermediate body 1 in an inverted bowl-shaped structure.
Use respectively the utility model discloses in have opening annular structure's cooling water course 3 and use among the prior art having the cooling water course 3 of the annular structure that closes mouthful to cool down turbine end flange 2, the temperature contrast table that is located 20 peripheral region's of through-hole turbine end flange 2 is as follows:
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maximum temperature
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The utility model discloses
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427℃
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Prior Art
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523℃ |
Compared with the prior art, the utility model, useful part lies in: the utility model optimizes the structure of the cooling water channel 3 in the prior art, optimizes the closed annular structure of the cooling water channel 3 in the prior structure into an open annular structure, and when the optimized cooling water channel 3 is used for cooling the turbine end flange 2, the cooling water flowing into the cooling water channel 3 through the water inlet channel 4 flows in the cooling water channel 3 and flows out of the water outlet channel 5, and the cooling water flows through the cooling water channel 3 in the area near the through hole 20 in the cooling water channel 3;
the problem of the prior art that when cooling water flows in the cooling water channel 3, part of the cooling water does not flow through the cooling water channel 3 in the area near the through hole 20 is solved; this ensures that the cooling water flows through the cooling water channel 3 in the region near the through-opening 20, so that the turbine-end flange 2 in the region near the through-opening 20 has a better cooling effect.
As shown in fig. 2 and 3, a blocking portion 6 is provided between two open ends of the cooling water channel 3, the width of the blocking portion 6 is 4mm to 10mm, the width of the blocking portion 6 may be 4mm, 7mm or 10mm, and preferably, the width of the blocking portion 6 is 4mm. The provision of the blocking portion 6 ensures that the cooling water flowing into the cooling water passage 3 does not flow from one open end to the other open end between the two open ends of the cooling water passage 3, resulting in a problem of diversion in which part of the cooling water does not flow through the cooling water passage 3 in the vicinity of the through-hole 20; meanwhile, the width of the blocking part 6 is reduced as much as possible, so that the cooling effect of the turbine end flange 2 in the area near the blocking part 6 can be ensured.
As shown in fig. 2 to 4, the through-hole 20 is close to the cooling water passage 3 on one side of the cooling water passage 3, and the through-hole 20 is distant from the water inlet passage 4 and the water outlet passage 5. After the structure is applied, the through hole 20 is arranged close to the cooling water channel 3, so that the turbine end flange 2 in the area near the through hole 20 can obtain better cooling effect; the through hole 20 is far away from the structures of the water inlet channel 4 and the water outlet channel 5, and the rocker arm bushing is conveniently connected in the through hole 20.
As shown in fig. 2, the cooling water passage 3 includes a C-shaped region 30 having a C-shaped longitudinal section; the blocking portion 6 is formed between both end portions of the C-shaped region 30; the water inlet channel 4 and the water outlet channel 5 are respectively communicated with two ends of the C-shaped area 30. The structure can ensure that the cooling water channel 3 has larger volume, and ensures that the flow rate and the detention time of the cooling water in the cooling water channel 3 are longer, so that the turbine end flange 2 obtains better cooling effect; meanwhile, the cooling water channel 3 with the longitudinal section in the C-shaped structure is easier to realize in process.
As shown in fig. 3, the cooling water channel 3 includes a first enlarged cavity 31 and a second enlarged cavity 32 respectively communicating with the main body of the C-shaped region 30; the first diffusion cavity 31 and the second diffusion cavity 32 are located on two sides of the through hole 20, and the communication section 310 of the first diffusion cavity 31 and the second diffusion cavity 32 is located on the main body of the C-shaped area 30; the first diffusion chamber 31, the communicating section 310, and the second diffusion chamber 32 together form a semi-annular structure extending along the circumferential direction of the through hole 20. After the structure is applied, the volume of the cooling water channel 3 can be enlarged through the first diffusion cavity 31 and the second diffusion cavity 32, the flow of cooling water in the cooling water channel 3 in the area near the through hole 20 is ensured to be larger, and the turbine end flange 2 in the area near the through hole 20 obtains a better cooling effect; meanwhile, the structure can provide an avoiding space for the arrangement of the through holes 20, and the process requirements are met.
As shown in fig. 3, the cooling water channel 3 includes a third cavity 33 communicated with one end of the C-shaped region 30 and extending toward the water inlet channel 4; the third cavity 33 is located obliquely below one end of the C-shaped region 30 and is in communication with the inlet channel 4. The third expansion cavity 33 can expand the volume of the cooling water channel 3, and ensure that the flow of cooling water in the cooling water channel 3 is larger, so that the turbine end flange 2 obtains a better cooling effect.
As shown in fig. 3, the cooling water channel 3 further includes a fourth cavity 34 communicated with the other end of the C-shaped region 30 and extending toward the water outlet channel 5; the fourth cavity 34 is located obliquely below the other end of the C-shaped region 30 and communicates with the water outlet channel 5. The volume of the cooling water channel 3 can be enlarged due to the arrangement of the fourth expansion cavity 34, so that the flow of cooling water in the cooling water channel 3 is ensured to be larger, and the turbine end flange 2 can obtain a better cooling effect.
As shown in fig. 1, a clearance groove 10 is formed on a sidewall of the intermediate body 1 below the through hole 20. The provision of the clearance groove 10 provides space for mounting the rocker arm bushing in the through hole 20 and for the rocker arm bushing to be pivotally connected to the rocker arm.
As shown in fig. 1, a fabrication hole 11 communicated with the cooling water channel 3 is further formed in the side wall of the intermediate body 1, and a water plug 12 for sealing the fabrication hole 11 is connected in the fabrication hole 11. The arrangement of the fabrication holes 11 ensures that the cooling water channel 3 is easier to process and manufacture in the intermediate body 1; after the process hole 11 is sealed by the water plug 12, the cooling water in the cooling water channel 3 is ensured not to flow out through the process hole 11, and the cooling effect of the turbine end flange 2 is ensured not to be influenced.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.