CN215090627U - Cooling device for casting engine cylinder barrel - Google Patents
Cooling device for casting engine cylinder barrel Download PDFInfo
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- CN215090627U CN215090627U CN202120735952.3U CN202120735952U CN215090627U CN 215090627 U CN215090627 U CN 215090627U CN 202120735952 U CN202120735952 U CN 202120735952U CN 215090627 U CN215090627 U CN 215090627U
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- blind hole
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Abstract
The utility model provides a cooling device of casting engine cylinder, including the cylinder mandrel, the casing of cylinder mandrel is blind hole form barrel, set up a runner core in the casing, the runner core extends along casing blind hole axial, runner core upper end circumference is equipped with the flange, and form sealedly through flange and blind hole interference fit, runner core periphery is equipped with the helicla flute, the notch lateral wall and the laminating of blind hole inner wall of helicla flute form the spiral runner, the upper reaches end of helicla flute is located the flange below, communicate with the entry of the coolant that runner core up end was equipped with, set up the outflow runner that an axial link up in the runner core, helicla flute lower extreme and outflow runner lower extreme intercommunication, the export of outflow runner is located runner core up end.
Description
Technical Field
The utility model relates to a mould casting field, in particular to cooling device of casting engine cylinder.
Background
In the existing motorcycle, a box body and a cylinder body are important components in an engine and play important roles in combustion work and power transmission of the engine, and the cylinder barrel is used as a motion field for reciprocating motion of a piston and has high requirements and cannot have casting defects such as pinholes, slag holes, shrinkage porosity and the like. However, the cylinder has a relatively thick wall and a relatively deep cylinder, so that pinholes, shrinkage porosity and the like are often formed in the middle section, and the solution is very difficult. Cooling the cylinder barrel is one of the effective means to make the temperature of the cylinder barrel transition from low to high from the upper end to the lower end so as to achieve the purpose of sequential solidification. At present, a cylinder core die (9) is used for forming a cylinder barrel, the cylinder barrel core die (9) is required to be cooled when a cylinder barrel (10) is cooled, a blind hole is formed in the cylinder barrel core die (9), a cooling core (11) for cooling is arranged in the blind hole, a cooling medium channel (12) is arranged in the cooling core (11), the cooling medium channel (12) axially extends along the cylinder barrel (10), two channel openings are formed in the top of the cooling core (11), one channel opening leads to the side surface, the other channel opening leads to the axially extending cooling medium channel (12), and cooling medium can enter the cooling core (11) in two modes, namely, as shown in figure 5, one mode is that the cooling medium enters from one channel opening in the top of the cooling core (11), flows to the side surface of the cooling core (11), flows through the axial channel between the outer periphery of the cooling core (11) and the side wall of the blind hole, and flows out in a circulating mode through the axially extending cooling medium channel (12) in the cooling core (11) along the bottom. However, after the cooling medium enters from the top, the cooling medium directly falls to the bottom under the action of gravity and pressure, and less heat is taken away from the side wall of the blind hole, so that the aim of cooling the side wall of the cylinder barrel (10) cannot be achieved, and the cooling medium directly falls to the bottom, and since the molten metal flows from bottom to top, the influence on the temperature of the molten metal is large, certain influence is caused on the molding and feeding of the upper part of the cylinder barrel (10), and the molding can be seriously or even cannot be performed. The other one is that the molten metal enters from the other channel opening at the top of the cooling core (11) and flows through the axially extending cooling medium channel (12) in the cooling core (11) to reach the bottom, so that the bottom is cooled seriously, the heat loss of the molten metal is serious, the temperature field of the cylinder barrel (10) is lower at the lower end and higher at the upper end, the purpose of sequential solidification is not achieved, and more serious results are caused, namely, because the temperature of the molten metal at the bottom is too low at the cylinder barrel core mold (9), the temperature of the molten metal at the bottom is reduced too fast, so that a feeding channel is closed in advance, and pinholes and shrinkage porosity in the cylinder barrel are more serious.
Disclosure of Invention
The utility model discloses a solve the problem that above prior art exists, provide a cooling device of casting engine cylinder, can make the cylinder from the upper end to the temperature of lower extreme transition from low to high, realize the purpose that the order solidifies, the technical scheme of the utility model as follows:
a cooling device for casting an engine cylinder comprises a cylinder core die, wherein a shell (3) of the cylinder core die is a blind hole-shaped cylinder body, a flow channel core (1) is arranged in the shell (3), the flow channel core (1) axially extends along the blind hole of the shell (3), a flange (2) is arranged on the circumference of the upper end of the flow channel core (1) and is sealed by interference fit of the flange (2) and the blind hole, a spiral groove (4) is arranged on the periphery of the flow channel core (1), the side wall of a groove opening of the spiral groove (4) is attached to the inner wall of the blind hole to form a spiral flow channel, the upstream end of the spiral groove (4) is positioned below the flange (2) and is communicated with an inlet (6) of a cooling medium arranged on the upper end face of the flow channel core (1), an axially through outflow flow channel (5) is arranged in the flow channel core (1), and the lower end of the spiral groove (4) is communicated with the lower end of the outflow channel (5), and an outlet (7) of the outflow channel (5) is arranged on the upper end surface of the channel core (1).
The section of the spiral groove (4) is semicircular.
The radius of the semicircle is 5-7 mm.
And a space for passing a cooling medium is reserved between the bottom end of the flow channel core (1) and the bottom of the blind hole.
And the side wall of the notch of the spiral groove (4) is in clearance fit with the inner wall of the blind hole.
And the shell (3) is provided with a limiting step for limiting a casting die.
Adopt above-mentioned technical scheme: comprises a cylinder core mould, a shell (3) of the cylinder core mould is a blind hole-shaped cylinder body, a runner core (1) is arranged in the shell (3), the flow channel core (1) extends axially along the blind hole of the shell (3), a flange (2) is arranged on the circumference of the upper end of the flow channel core (1), and the flange (2) is in interference fit with the blind hole to form sealing, a spiral groove (4) is arranged on the periphery of the runner core (1), the side wall of the notch of the spiral groove (4) is attached to the inner wall of the blind hole to form a spiral flow channel, the upstream end of the spiral groove (4) is positioned below the flange (2), is communicated with a cooling medium inlet (6) arranged on the upper end surface of the runner core (1), an axially through outflow channel (5) is arranged in the channel core (1), the lower end of the spiral groove (4) is communicated with the lower end of the outflow channel (5), and an outlet (7) of the outflow channel (5) is formed in the upper end face of the channel core (1). The cooling medium flows in from the spiral flow channel, flows down along the side wall of the blind hole along the shape of the thread, flows out through the outflow flow channel (5) after reaching the bottom of the blind hole, effectively ensures that the low-temperature cooling medium flows down along the side wall from the upper part of the blind hole all the time, and takes away the heat of the side wall for the second time, so that the temperature of the cylinder barrel from the upper end to the lower end is transited from low to high, the purpose of sequentially solidifying molten metal is realized, and when the cooling medium reaches the bottom of the blind hole of the shell (3), the temperature is higher, the influence on the temperature of the bottom is smaller, no influence is caused on the filling and feeding of the molten metal, and the finally solidified cylinder barrel cannot have the defects of pinholes, shrinkage porosity and the like.
The side wall of the notch of the spiral groove (4) is in clearance fit with the inner wall of the blind hole, so that the flow channel core (1) and the shell (3) can be assembled conveniently.
The invention is further described with reference to the drawings and the specific embodiments.
Drawings
FIG. 1 is a schematic view of a cylinder barrel;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic structural view of a runner core;
FIG. 4 is a schematic view of an upper end surface of a flow channel core;
FIG. 5 illustrates two ways of entering the cooling medium of a cooling device according to the prior art;
fig. 6 is a schematic view of a structure of a cooling core of the related art.
Detailed Description
The utility model discloses an embodiment of cooling device of casting engine cylinder:
referring to fig. 1-6, a cooling device for casting an engine cylinder comprises a cylinder core mold, wherein a shell (3) of the cylinder core mold is a blind hole-shaped cylinder body, a flow channel core (1) is arranged in the shell (3), the flow channel core (1) axially extends along the blind hole of the shell (3), a flange (2) is arranged on the circumference of the upper end of the flow channel core (1), the flange (2) is in interference fit with the blind hole to form sealing, when a cooling medium is liquid, the flange (2) is in interference fit with the blind hole and then welded to ensure sealing, and when the cooling medium is gas, only the flange (2) is in interference fit with the blind hole. The runner core (1) periphery is equipped with helicla flute (4), the notch lateral wall and the laminating of blind hole inner wall of helicla flute (4) form the spiral runner, and the notch lateral wall and the blind hole inner wall clearance fit of helicla flute (4) are convenient for the assembly of runner core (1) and casing (3). The section of the spiral groove (4) is semicircular, the radius of the semicircular is 5-7 mm, and in the embodiment, the radius of the semicircular is 6 mm. The upper reaches end of helicla flute (4) is located flange (2) below, and with the entry (6) intercommunication of the coolant that runner core (1) up end was equipped with, set up an axial through's outflow runner (5) in runner core (1), helicla flute (4) lower extreme and outflow runner (5) lower extreme intercommunication, the export (7) of outflow runner (5) are located runner core (1) up end. And a space for passing a cooling medium is reserved between the bottom end of the flow channel core (1) and the bottom of the blind hole. Be equipped with spacing step on casing (3) and be used for with casting mould spacing, be convenient for casing (3) location on casting mould. The spiral groove (4) arranged on the periphery of the flow channel core (1) can be a double-head spiral groove, and a single-head spiral groove is arranged in the embodiment. The cooling medium flows in from the spiral flow channel, flows down along the side wall of the blind hole along the shape of the thread, flows out through the outflow flow channel (5) after reaching the bottom of the blind hole, effectively ensures that the low-temperature cooling medium flows down along the side wall from the upper part of the blind hole all the time, and takes away the heat of the side wall for the second time, so that the temperature of the cylinder barrel (8) is transited from low to high from the upper end to the lower end, the purpose of sequentially solidifying molten metal is realized, and when the cooling medium reaches the bottom of the blind hole of the shell (3), the temperature is higher, the influence on the temperature of the bottom is smaller, no influence is caused on the filling type feeding of the molten metal, and the finally solidified cylinder barrel (8) cannot have the defects of pinholes, shrinkage porosity and the like.
The utility model discloses the during operation, coolant gets into from entry (6) of runner core (1) up end, then flows in spiral runner, along the blind hole lateral wall and down along the shape of screw thread, passes through outflow runner (5) again behind the blind hole bottom, flows from export (7), so circulation.
Claims (6)
1. The utility model provides a cooling device of casting engine cylinder, includes the cylinder mandrel, casing (3) of cylinder mandrel are blind hole form barrel, set up a runner core (1), its characterized in that in casing (3): runner core (1) is along casing (3) blind hole axial extension, runner core (1) upper end circumference is equipped with flange (2), and forms sealedly with blind hole interference fit through flange (2), runner core (1) periphery is equipped with helicla flute (4), the notch lateral wall and the laminating of blind hole inner wall of helicla flute (4) form the spiral runner, the upper reaches end of helicla flute (4) is located flange (2) below, and entry (6) the intercommunication of the coolant that is equipped with runner core (1) up end, set up the outflow runner (5) that an axial link up in runner core (1), helicla flute (4) lower extreme and outflow runner (5) lower extreme intercommunication, the export (7) of outflow runner (5) are located runner core (1) up end.
2. The cooling apparatus for casting an engine cylinder as defined in claim 1, wherein: the section of the spiral groove (4) is semicircular.
3. The cooling apparatus for casting an engine cylinder as defined in claim 2, wherein: the radius of the semicircle is 5-7 mm.
4. The cooling apparatus for casting an engine cylinder as defined in claim 1, wherein: and a space for passing a cooling medium is reserved between the bottom end of the flow channel core (1) and the bottom of the blind hole.
5. The cooling apparatus for casting an engine cylinder as defined in claim 1, wherein: and the side wall of the notch of the spiral groove (4) is in clearance fit with the inner wall of the blind hole.
6. The cooling apparatus for casting an engine cylinder as defined in claim 1, wherein: and the shell (3) is provided with a limiting step for limiting a casting die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120735952.3U CN215090627U (en) | 2021-04-12 | 2021-04-12 | Cooling device for casting engine cylinder barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120735952.3U CN215090627U (en) | 2021-04-12 | 2021-04-12 | Cooling device for casting engine cylinder barrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215090627U true CN215090627U (en) | 2021-12-10 |
Family
ID=79264890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120735952.3U Active CN215090627U (en) | 2021-04-12 | 2021-04-12 | Cooling device for casting engine cylinder barrel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215090627U (en) |
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2021
- 2021-04-12 CN CN202120735952.3U patent/CN215090627U/en active Active
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