U.S. patent application number 13/871667 was filed with the patent office on 2014-03-06 for casing of a turbocharger.
This patent application is currently assigned to Tan Xin Technology Development Inc.. The applicant listed for this patent is TAN XIN TECHNOLOGY DEVELOPMENT INC.. Invention is credited to Ching-Chung KO, Chun-An LAI.
Application Number | 20140064940 13/871667 |
Document ID | / |
Family ID | 48193668 |
Filed Date | 2014-03-06 |
United States Patent
Application |
20140064940 |
Kind Code |
A1 |
LAI; Chun-An ; et
al. |
March 6, 2014 |
CASING OF A TURBOCHARGER
Abstract
A casing of a turbocharger has a main body and a heat
dissipating layer disposed on an outer surface of the main body.
When heat inside the main body is conducted to the outer surface of
the main body, the heat dissipating layer dissipates the heat
quickly. Since the heat does not accumulate in the main body,
temperature of the main body is low and the casing does not oxidize
under high temperature. Therefore, the casing of the turbocharger
has low manufacturing cost and is economical.
Inventors: |
LAI; Chun-An; (Keelung City,
TW) ; KO; Ching-Chung; (Keelung City, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
TAN XIN TECHNOLOGY DEVELOPMENT INC. |
Keelung City |
|
TW |
|
|
Assignee: |
Tan Xin Technology Development
Inc.
Keelung City
TW
|
Family ID: |
48193668 |
Appl. No.: |
13/871667 |
Filed: |
April 26, 2013 |
Current U.S.
Class: |
415/177 |
Current CPC
Class: |
F02C 6/12 20130101; F01D
25/145 20130101 |
Class at
Publication: |
415/177 |
International
Class: |
F01D 25/14 20060101
F01D025/14 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 4, 2012 |
TW |
101216996 |
Claims
1. A casing of a turbocharger comprising: a main body being hollow
and having an outer surface; and a heat dissipating layer disposed
on the outer surface of the main body.
2. The casing of the turbocharger as claimed in claim 1, wherein
the heat dissipating layer is coated on the outer surface of the
main body.
3. The casing of the turbocharger as claimed in claim 1, wherein
the outer surface of the main body is rough.
4. The casing of the turbocharger as claimed in claim 2, wherein
the outer surface of the main body is rough.
5. The casing of the turbocharger as claimed in claim 1, wherein
the heat dissipating layer comprises multiple carbon nanocapsules
(CNCs).
6. The casing of the turbocharger as claimed in claim 2, wherein
the heat dissipating layer comprises multiple carbon nanocapsules
(CNCs).
7. The casing of the turbocharger as claimed in claim 3, wherein
the heat dissipating layer comprises multiple carbon nanocapsules
(CNCs).
8. The casing of the turbocharger as claimed in claim 4, wherein
the heat dissipating layer comprises multiple carbon nanocapsules
(CNCs).
9. The casing of the turbocharger as claimed in claim 6, wherein an
amount of the CNCs is 7 weight percent (wt %) of the heat
dissipating layer.
10. The casing of the turbocharger as claimed in claim 8, wherein
an amount of the CNCs is 7 wt % of the heat dissipating layer.
11. The casing of the turbocharger as claimed in claim 9, wherein a
thickness of the heat dissipating layer is 20 .mu.m to 80
.mu.m.
12. The casing of the turbocharger as claimed in claim 10, wherein
a thickness of the heat dissipating layer is 20 .mu.m to 80
.mu.m.
13. The casing of the turbocharger as claimed in claim 11, wherein
a thickness of the heat dissipating layer is 50 .mu.m.
14. The casing of the turbocharger as claimed in claim 12, wherein
a thickness of the heat dissipating layer is 50 .mu.m.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a casing of a turbocharger,
especially to a casing of a turbocharger of a vehicle engine.
[0003] 2. Description of the Prior Art(s)
[0004] An engine is the core of a vehicle. Increasing performance
of the engine is necessary for improving overall performance of the
vehicle. To increase the performance of the engine, more fuel and
air should be fed into the engine. As more fuel is burned, more
power is generated.
[0005] A conventional turbocharger comprises a compressing unit, a
turbine unit, and a central shaft. The central shaft has two ends
respectively connected to the compressing unit and the turbine
unit. Exhaust gas discharged from the engine drives an impeller of
the turbine unit such that the central shaft and an impeller of the
compressing unit rotate accordingly. Thus, a great mass of air is
compressed by the compressing unit and is fed to the engine to
enhance the performance of the engine.
[0006] However, when the conventional turbocharger operates, a
great deal of heat is generated such that temperature of the
conventional turbocharger is raised. Since a casing of the
conventional turbocharger is made of metal, the metal casing is
oxidized easily under high temperature. In order to avoid
oxidation, the casing of the conventional turbocharger may be
anodized or may be made of heat resistant materials, such as
ceramic material, composite material, heat resistant steel, or the
like, but both of said technical means increase manufacturing cost
of the casing and are not economical.
[0007] To overcome the shortcomings, the present invention provides
a casing of a turbocharger to mitigate or obviate the
aforementioned problems.
SUMMARY OF THE INVENTION
[0008] The main objective of the present invention is to provide a
casing of a turbocharger. The casing has a main body and a heat
dissipating layer disposed on an outer surface of the main
body.
[0009] When heat inside the main body is conducted to the outer
surface of the main body, the heat dissipating layer dissipates the
heat quickly. Since the heat does not accumulate in the main body,
temperature of the main body is low and the casing does not oxidize
under high temperature. Therefore, the casing of the turbocharger
has low manufacturing cost and is economical.
[0010] Other objectives, advantages and novel features of the
invention will become more apparent from the following detailed
description when taken in conjunction with the accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 is a side view in partial section of a first
embodiment of a casing of a turbocharger in accordance with the
present invention;
[0012] FIG. 2 is an enlarged cross-sectional side view of the first
embodiment of the casing in FIG. 1;
[0013] FIG. 3 is an enlarged cross-sectional side view of a second
embodiment of a casing of a turbocharger in accordance with the
present invention;
[0014] FIG. 4 is a schematic perspective view of an experimental
apparatus for the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0015] With reference to FIGS. 1 to 3, a casing of a turbocharger
in accordance with the present invention comprises a main body 10,
10A and a heat dissipating layer 20.
[0016] The main body 10, 10A is hollow and has an outer surface.
With reference to FIG. 2, the outer surface of the main body 10 may
be smooth. With reference to FIG. 3, the outer surface of the main
body 10A may be rough.
[0017] The heat dissipating layer 20 is disposed on the outer
surface of the main body 10, 10A, is coated on the outer surface of
the main body 10, 10A and comprises multiple carbon nanocapsules
(CNCs).
[0018] Specifically, the CNCs are mixed with aqueous based
inorganic resins to form a fluid heat dissipating coating, wherein
an amount of the CNCs is 2 weight percent (wt %) and an amount of
the aqueous based inorganic resins is 98 wt % of the fluid heat
dissipating coating. After the fluid heat dissipating coating is
coated on the outer surface of the main body 10, 10A and is dried,
the amount of the CNCs becomes 7 wt % of the dried heat dissipating
coating. Moreover, a thickness of the dried heat dissipating
coating, i.e. the heat dissipating layer 20, is 20 .mu.m to 80
.mu.m. Preferably, the thickness of the heating dissipating layer
20 is 50 .mu.m.
[0019] With reference to FIG. 1, the turbocharger further has a
compressing unit 30, a turbine unit 50 and a central shaft 40. The
compressing unit 30, the turbine unit 50 and the central shaft 40
are all mounted in the casing. The central shaft 40 is disposed
between the compressing unit 30 and the turbine unit 50 and has two
ends respectively connected to the compressing unit 30 and the
turbine unit 50. When an impeller 51 of the turbine unit 50
rotates, the central shaft 40 and an impeller 31 of the compressing
unit 30 rotate accordingly. When the compressing unit 30, the
turbine unit 50 and the central shaft 40 operate, a great deal of
heat is generated. The heat is sequentially conducted to the main
body 10, 10A and the heat dissipating layer 20, and then is
dissipated from the heat dissipating layer 20.
[0020] Specifically, an experiment in heat dissipating effect of
the heat dissipating layer 20 to the casing is carried out as
follows.
[0021] A control group: a casing of a turbocharger without a heat
dissipating layer, which is the same as the main body 10, 10A of
the present invention.
[0022] An experimental group: the casing of the turbocharger in
accordance with the present invention.
[0023] Experimental Procedures:
[0024] (1) With reference to FIG. 4, a thermocouple thermometer is
provided. The casing is divided into an area A, an area B, and an
area C. The thermocouple thermometer has multiple junctions
respectively connecting to the area A, the area B, and the area
C.
[0025] (2) Provide a heating device. The heating device comprises a
jet burner 70 corresponding to an interior of the casing.
[0026] (3) Switch on the heating device to allow the jet burner 70
to continuously and steadily heat the casing, and measure and
record beginning times and initial temperatures when temperatures
of the area A, the area B and the area C of the casing begin
rising.
[0027] (4) Switch off the heating device to stop heating the casing
when the temperatures of the area A, the area B and the area C of
the casing stop rising and the area A, the area B and the area C
the casing achieve their respective highest temperatures.
[0028] Experiment Result: as Shown in Table 1.
TABLE-US-00001 TABLE 1 Control Group Experimental Group A B C A B C
Beginning 15:24:26 15:24:26 15:24:26 13:47:09 13:47:09 13:47:09
Time of Temperature Rise (hh:mm:ss) Initial 37.5 36.5 39.5 38.0
58.3 34.5 Temperature of Temperature Rise (.degree. C.) Time of
15:37:17 15:43:07 15:36:59 14:11:02 14:11:02 14:11:01 Achieving
Highest Temperature (hh:mm:ss) Heating 00:12:51 00:18:41 00:12:33
00:23:53 00:23:53 00:23:52 Time (hh:mm:ss) Heating 12.85 18.68
12.55 23.88 23.88 23.86 Time (min) Highest 901.9 906.2 867.7 761.9
788.8 710.1 Temperature (.degree. C.) Heating 67.3 46.5 66.0 30.3
30.6 28.3 Rate (.degree. C./min) Average 59.9 29.7 Heating Rate
(.degree. C./min)
[0029] As shown in Table 1, the average heating rate of the control
group is 59.9.degree. C./min. The average heating rate of the
experimental group is 29.7.degree. C./min, which is slower than the
average heating rate of the control group, and the two groups
differ from each other by the heat dissipating layer 20 of the
experimental group. When the casing of the experimental group is
heated and the temperature of the casing of the experimental group
rises, the heat dissipating layer 20 is efficiently helpful in
dissipating heat.
[0030] Furthermore, in the above mentioned experiment, the heating
device respectively heats the casings of the experimental group and
the control group until the casings achieve their respective
highest temperatures and the temperatures of the casings stop
rising. When the casings of the experimental and control groups are
heated, the heat is dissipated from the casings of the experimental
and control groups simultaneously. Therefore, according to the
highest temperatures and the heating times of the casings of the
experimental and control groups, the heat dissipating effects of
the casings of the experimental and control groups can be measured.
As shown in Table 1, the highest temperatures of the casing of the
experimental group range from 710.1.degree. C. to 761.9.degree. C.
. The highest temperatures of the casing of the control group range
from 867.7.degree. C. to 906.2.degree. C., which are higher than
the highest temperatures of the casing of the experimental group.
The heating times of the experimental group range from 23.88 min to
23.86 min. The heating times of the control group range from 12.55
min to 18.68 min, which are shorter than the heating times of the
experimental group. The experiment demonstrates that it takes more
time to heat the casing of the experimental group to allow the
casing of the experimental group to achieve its highest
temperatures than to heat the casing of the control group to allow
the casing of the control group to achieve its highest
temperatures, and the highest temperatures of the casing of the
experimental group are lower than the highest temperatures of the
casing of the control group. Therefore, the casing of the
experimental group has better heat dissipating effect than the
casing of the control group.
[0031] The casing of the turbocharger in accordance with the
present invention has the following advantages. With the heat
dissipating layer 20 disposed on the outer surface of the main body
10, 10A, when the heat inside the main body 10, 10A is conducted to
the outer surface of the main body 10, 10A, the heat dissipating
layer 20 dissipates the heat quickly. Since the heat does not
accumulate in the main body 10, 10A, the temperature of the main
body 10, 10A is low and the casing does not oxidize under high
temperature. The heating dissipating layer 20 may be coated on the
outer surface of the main body 10, 10A. Coating the heat
dissipating layer 20 on the outer surface of the main body 10, 10A
is easy and cost effective. Therefore, the casing of the
turbocharger of the present invention has low manufacturing cost
and is economical. Moreover, as each of the CNCs of the heat
dissipating layer 20 is formed as a carbon sphere encapsulated in a
hollow carbon sphere, structure of the CNC allows the CNC to have a
good heat dissipating effect. Consequently, the heating dissipating
layer 20 has improved heat dissipating effect.
[0032] Even though numerous characteristics and advantages of the
present invention have been set forth in the foregoing description,
together with details of the structure and features of the
invention, the disclosure is illustrative only. Changes may be made
in the details, especially in matters of shape, size, and
arrangement of parts within the principles of the invention to the
full extent indicated by the broad general meaning of the terms in
which the appended claims are expressed.
* * * * *