CN210676898U - A cooling structure for low pressure casting of wheel hub - Google Patents

Abstract

The utility model discloses a cooling structure for low-pressure casting of a hub, which comprises a die body and a cooling cavity arranged on the die body and used for cooling, wherein the inner wall of the cooling cavity is provided with a heat exchange surface, a sealing cover is arranged at the opening at the upper end of the cooling cavity, and the upper end of the sealing cover is provided with a water inlet pipe convenient for cooling water to enter and a water outlet pipe used for discharging the water after heat exchange; the inlet tube lower extreme extends to the cooling chamber bottom, the port is close to the cooling chamber top on the outlet pipe, the utility model discloses the drawback to current device existence improves, through improving the inlet tube, does benefit to the kinetic energy with in the cooling water as power, and then drives the puddler disturbance liquid and flow, drives the continuous clearance of clearance brush to the cooling intracavity wall simultaneously to prevent the formation of dirt, guaranteed the heat transfer effect, the practicality is strong.

Description

A cooling structure for low pressure casting of wheel hub

technical field

The utility model relates to the technical field of automobile processing equipment, in particular to a cooling structure for low-pressure casting of wheel hubs.

Background technique

With the development of the industry, the precision of the parts used by many factories is also getting higher and higher, and the amount of use is also increasing. In order to quickly process the wheel hub, many mold processing factories have introduced a cooling structure for low-pressure casting of the wheel hub to cool the mold and accelerate the process. Its molding time has greatly accelerated its production rate.

However, the current cooling structure for low-pressure casting of wheel hubs generally passes cooling water into the mold during cooling to rapidly cool the mold to improve processing efficiency. A layer of dirt is formed on the surface, which will lead to a serious decline in the cooling effect in the later stage. During convection cooling, only the part of the cold water close to the cooling surface can conduct effective heat exchange, and the part of the water far away from the cooling surface cannot absorb enough heat, so The problem of unsatisfactory cooling effect.

In view of the above problems, a cooling structure for low pressure casting of a wheel hub is now proposed.

Utility model content

The purpose of the present utility model is to provide a cooling structure for low-pressure casting of a wheel hub, so as to solve the problem that the cooling structure for low-pressure casting of a wheel hub proposed in the above background technology will form a layer of dirt on the heat exchange surface after a long time of cooling water. In addition, during convection cooling, only part of the cold water close to the cooling surface can effectively exchange heat, and part of the water far from the cooling surface cannot absorb enough heat, resulting in an unsatisfactory cooling effect. question.

To achieve the above object, the utility model provides the following technical solutions:

A cooling structure for low-pressure casting of a wheel hub, comprising a mold body and a cooling cavity arranged thereon for cooling, the inner wall of the cooling cavity is provided with a heat exchange surface, the upper end opening of the cooling cavity is provided with a cover, the sealing The upper end of the cover is provided with a water inlet pipe for cooling water to enter and a water outlet pipe for draining the heat-exchanged water;

The lower end of the water inlet pipe extends to the bottom of the cooling chamber, and the upper port of the water outlet pipe is close to the top of the cooling chamber;

The water inlet pipe includes a water inlet section that is fixedly connected to the cover, the lower end of the water inlet section is connected to the connecting section through a conical section, and the diameter of the water inlet section is more than twice the diameter of the connecting section. The lower end is connected with a rotating section through a rotating assembly, and the lower end surface of the rotating section is a closed structure. The lower end of the rotating section is provided with a transmission assembly for converting the kinetic energy of the fluid into its own rotating torque. The stirring rod is disturbed by the cooling liquid in the cooling cavity, and the end of the stirring rod is provided with a cleaning brush that is in contact with the inner wall of the cooling cavity;

The transmission assembly includes a drive fan blade disposed at a port on the rotating segment.

As a further solution of the present invention, the cover is connected and fixed with the mold body by bolts, and a gasket for improving the connection and sealing performance is provided between the cover and the mold body.

As a further solution of the present invention, the transmission assembly includes a connecting sleeve arranged at the lower end of the connecting section, and the inner wall of the connecting sleeve is provided with a rotating bearing matched with the rotating section and a sealing ring for improving sealing.

As a further solution of the present invention, the transmission assembly further includes at least two drainage pipes arranged in an array outside the lower end of the rotating section, and the outer end of the drainage pipe is provided with a rotating water spray pipe arranged parallel to the tangent to the surface of the rotating section.

Compared with the prior art, the beneficial effects of the present utility model are: the utility model improves the disadvantages of the existing devices, and by improving the water inlet pipe, the kinetic energy in the cooling water is used as power, and then the stirring rod is driven to disturb the liquid. At the same time, it drives the cleaning brush to continuously clean the inner wall of the cooling cavity, thereby preventing the formation of dirt, ensuring the heat exchange effect, and having strong practicability.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

FIG. 2 is a schematic structural diagram of a water inlet pipe in the utility model.

FIG. 3 is a schematic structural diagram of a rotating water spray pipe in the utility model.

FIG. 4 is a partial enlarged view of the structure of the utility model.

Among them: mold body 1, water outlet pipe 2, cover 3, water inlet pipe 4, cooling cavity 5, heat exchange surface 6, water inlet section 41, conical section 42, rotating bearing 43, sealing ring 44, driving fan blade 45, The rotating water spray pipe 46 , the drain pipe 47 , the cleaning brush 48 , the stirring rod 49 , the rotating section 410 , the connecting sleeve 411 , and the connecting section 412 .

Detailed ways

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "horizontal", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility. The novel and simplified description does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", etc., may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Example 1

Referring to Figures 1-2, in an embodiment of the present invention, a cooling structure for low-pressure casting of a wheel hub includes a mold body 1 and a cooling cavity 5 arranged thereon for cooling, and the inner wall of the cooling cavity 5 is provided with a heat exchange Face 6, the upper opening of the cooling cavity 5 is provided with a cover 3, the cover 3 is connected and fixed with the mold body 1 by bolts, and there is a space between the cover 3 and the mold body 1 to improve the sealing performance of the connection This kind of bolt connection makes the device easy to disassemble and maintain in the later stage, and the upper end of the cover 3 is provided with a water inlet pipe 4 for cooling water to enter and a water outlet pipe 2 for draining the heat-exchanged water;

The lower end of the water inlet pipe 4 extends to the bottom of the cooling chamber 5, and the upper port of the water outlet pipe 2 is close to the top of the cooling chamber 5. This arrangement allows the incoming cold water to enter the bottom first, then flow upward along the cooling chamber 5, and then along the cooling chamber 5. The water outlet pipe 2 is discharged from the cooling chamber 5, which ensures that the cooling water has a sufficient heat exchange process, and also caters for the characteristics of low temperature sinking and high temperature floating.

The water inlet pipe 4 includes a water inlet section 41 that is fixedly connected to the cover 3 . The lower end of the water inlet section 41 is connected to the connecting section 412 through a conical section 42 , and the diameter of the water inlet section 41 is equal to the diameter of the connecting section 412 . More than twice, preferably three times, the speed of the liquid entering the connecting section 412 can be increased by the tapered section 42. The lower end of the connecting section 412 is connected with the rotating section 410 through the rotating assembly, and the lower end surface of the rotating section 410 is a closed structure, so The lower end of the rotating segment 410 is provided with a transmission assembly for converting the kinetic energy of the fluid into its own rotational torque, and the outside of the rotating segment 410 is provided with a plurality of sets of stirring rods 49 for disturbing the cooling liquid in the cooling chamber 5, so that there is no The liquid with lower temperature in contact with the heat exchange surface can have the opportunity to contact with the heat exchange surface 6, thereby improving the heat exchange effect; the end of the stirring rod 49 is provided with a cleaning brush 48 in contact with the inner wall of the cooling chamber 5. Under the action of the section 410 , the cleaning brush 48 at the end of the stirring rod 49 will clean the surface of the cooling chamber 5 , thereby avoiding the appearance of a dirt layer and ensuring the heat exchange effect of the heat exchange surface 6 .

The transmission assembly includes a driving fan blade 45 disposed at the upper port of the rotating section 410. Under the action of the fluid, the driving fan blade 45 will generate a rotating torque, thereby driving the rotating section 410 to rotate.

As shown in FIG. 4 , the transmission assembly includes a connecting sleeve 411 disposed at the lower end of the connecting section 412 , and the inner wall of the connecting sleeve 411 is provided with a rotating bearing 43 matched with the rotating section 410 and a sealing ring 44 for improving sealing. The rotating section 410 can be rotated by rotating the assembly, and the function of the sealing ring 44 is to improve the sealing performance between the two.

Example 2

As shown in FIG. 3 , the transmission assembly further includes at least two drainage pipes 47 distributed in an array on the outer side of the lower end of the rotating section 410 . 46. In this way, when the water in the rotating section 410 is discharged from the rotating water spray pipe 46, a reaction force will be generated, and the reaction force will generate a torque that makes the rotating section 410 rotate at a high speed, thereby acting together with the driving fan blade 45 to promote the rotating section. 410 turns.

The working principle of the utility model is as follows: when the water inlet pipe 4 enters cold water, the cold water enters along the water inlet section 41, and under the action of the conical section 42, the flow rate of the cold water is sharply accelerated, and then under the impact of the water flow, the fan is driven. The blade 45 will generate a rotating torque, thereby driving the rotating section 410 to rotate. When the cooling water flows out along the rotating section 410, after being sprayed from the rotating water spray pipe 46 during cooling, a rotating torque composed of a reaction force will be generated, thereby further driving The rotating section 410 rotates, and under the action of the rotating section 410, the stirring rod 49 will stir the rising cooling liquid, so that the liquid with lower temperature that is not in contact with the heat exchange surface can have the opportunity to contact the heat exchange surface 6, thereby In order to improve the heat exchange effect, the cleaning brush 48 at the end of the stirring rod 49 will clean the surface of the cooling cavity 5 , thereby avoiding the appearance of a dirt layer and ensuring the heat exchange effect of the heat exchange surface 6 .

To sum up, the sealing ring 44 is prepared by the following formula according to the following parts by weight: 25 parts of EPDM rubber, 8 parts of naphthenic rubber oil, 3 parts of paraffin oil, 5 parts of talc powder, 0.5 parts of antioxidant parts, 1.5 parts of vulcanizing agent, 2 parts of auxiliary vulcanizing agent, the antioxidant is formed by mixing and stirring diphenylamine and p-phenylenediamine, and the weight ratio of the diphenylamine and p-phenylenediamine is 0.9:1, and the Diphenylamine and p-phenylenediamine were mixed and stirred for 8 minutes, the stirring rate was 105 r/min, the vulcanizing agent was composed of sulfur and sulfur monochloride, and the weight ratio of the sulfur and sulfur monochloride was 1.1:0.85, Mixing and stirring for 20 minutes, mixing and stirring speed is 200r/min, the sealing ring made of the above raw materials has stable chemical properties, pressure resistance and wear resistance, good sealing performance and long service life.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention may be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments are to be considered in all respects as exemplary and not restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that the All changes within the meaning and range of the required equivalents are embraced within the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. A cooling structure for low-pressure casting of a hub comprises a die body (1) and a cooling cavity (5) arranged on the die body and used for cooling, wherein a heat exchange surface (6) is arranged on the inner wall of the cooling cavity (5), a sealing cover (3) is arranged at an opening at the upper end of the cooling cavity (5), and a water inlet pipe (4) facilitating the entering of cooling water and a water outlet pipe (2) used for discharging the water after heat exchange are arranged at the upper end of the sealing cover (3);

the water inlet pipe (4) is characterized by comprising a water inlet section (41) fixedly connected with the sealing cover (3), the lower end of the water inlet section (41) is connected with a connecting section (412) through a conical section (42), the diameter of the water inlet section (41) is more than twice of that of the connecting section (412), the lower end of the connecting section (412) is connected with a rotating section (410) through a rotating assembly, and the lower end face of the rotating section (410) is of a closed structure;

the lower end of the rotating section (410) is provided with a transmission assembly for converting fluid kinetic energy into self rotating torque;

a plurality of groups of stirring rods (49) used for disturbing cooling liquid in the cooling cavity (5) are arranged on the outer side of the rotating section (410), and cleaning brushes (48) in contact with the inner wall of the cooling cavity (5) are arranged at the end parts of the stirring rods (49);

the transmission assembly comprises a driving fan blade (45) arranged at the upper port of the rotating section (410).

2. The cooling structure for low-pressure hub casting according to claim 1, wherein the lower end of the water inlet pipe (4) extends to the bottom of the cooling cavity (5), and the upper port of the water outlet pipe (2) is close to the top of the cooling cavity (5).

3. The cooling structure for low-pressure hub casting according to claim 1, wherein the diameter of the water inlet section (41) is three times the diameter of the connecting section (412).

4. The cooling structure for low-pressure hub casting according to claim 1, wherein the cover (3) is fixedly connected with the mold body (1) through bolts, and a sealing gasket for improving the connection sealing performance is arranged between the cover (3) and the mold body (1).

5. The cooling structure for low-pressure hub casting according to any one of claims 1 to 4, wherein the transmission assembly comprises a connecting sleeve (411) arranged at the lower end of the connecting section (412), and the inner wall of the connecting sleeve (411) is provided with a rotating bearing (43) matched with the rotating section (410) and a sealing ring (44) for improving the sealing performance.

6. The cooling structure for low-pressure hub casting according to any one of claims 1 to 4, wherein the transmission assembly further comprises at least two water discharge pipes (47) distributed in an array on the outer side of the lower end of the rotating section (410), and the outer end of each water discharge pipe (47) is provided with a rotating water spray pipe (46) arranged in parallel with the surface tangent of the rotating section (410).

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