Water pump shell of engine

Abstract

The utility model provides a water pump shell of an engine, and belongs to the technical field of engines. The technical problem that the service life of a water pump shell of an existing engine is short is solved. The water pump shell of the engine comprises a barrel-shaped shell body, one end of the shell body is provided with a through shaft hole, the other end of the shell body is provided with an annular disc-shaped flange part which is arranged in the circumferential direction of the shaft hole, and the side face of the flange part is provided with an inclined guide part used for changing the water outlet direction. The periphery of the shell is further provided with a first exhaust hole parallel to the shaft hole, the inner wall of the shaft hole is provided with a first inclined hole obliquely formed in the direction away from the side where the flange part is located from inside to outside in the radial direction, and the outer end of the first inclined hole communicates with the first exhaust hole. And the inner end of the inclined hole I can penetrate out of the opening at the end part of the shaft hole along an axial extension line. The utility model has the advantages of low process cost and guaranteed service life.

Description

Technical Field

[0001] This utility model belongs to the field of engine technology and relates to a water pump housing for an engine. Background Technology

[0002] During engine operation, parts that come into contact with high-temperature combustion gases or exhaust are intensely heated, requiring a cooling system to dissipate the excess heat from these parts. The water pump is a key component of the water-cooled engine cooling system and plays a crucial role.

[0003] For example, the patent with authorization announcement number CN217354907U discloses a cooling pump for automobile engines, including a cooling pump body disposed on one side of the engine body. The engine body is provided with an inlet and an outlet. The cooling pump body includes a volute-shaped shell. One end of the shell is provided with an inlet section connected to the inlet. A turbine blade is installed in the inlet section as a water-drawing power source. The other end of the shell is provided with an outlet section connected to the outlet. A flow channel is provided in the outlet section.

[0004] The aforementioned pump casing can alleviate the eddy current phenomenon inside the pump and reduce the pump's outlet resistance, and can also reduce the size requirements of the water seal structure inside the shaft hole. However, it still has shortcomings: a small amount of coolant will inevitably enter the inner cavity of the shaft hole from the water seal of the impeller drive shaft, causing erosion and affecting the service life. Summary of the Invention

[0005] This utility model addresses the aforementioned problems in existing technologies by providing a water pump housing for an engine. The technical problem this utility model aims to solve is that existing water pumps have a limited service life.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A water pump housing for an engine includes a cylindrical housing with a through shaft hole at one end and a flange portion arranged in an annular disc shape around the shaft hole at the other end. The flange portion has an inclined guide portion on its side for changing the water outlet direction. The housing is characterized in that the outer periphery has an exhaust hole parallel to the shaft hole, and the inner wall of the shaft hole has an oblique hole arranged radially from the inside out towards the side opposite to the flange portion. The outer end of the oblique hole is connected to the exhaust hole, and the axial extension line of the inner end of the oblique hole can pass through the end opening of the shaft hole.

[0008] The shaft hole allows the drive shaft to extend into and drive the impeller inside the water pump to rotate, thus circulating the coolant. The flange is used to connect to the engine, forming a cavity between the housing and the engine to accommodate components such as the impeller. The inclined guide has an inclined, raised guide surface. The direction of the raised guide surface is different from the direction of water flow at that point, allowing the guide surface to smoothly guide the water flow thrown out by the water pump impeller into the outlet channel, avoiding excessive outlet resistance that would affect energy efficiency and water seal performance. An exhaust port is provided on the housing, arranged parallel to the shaft hole, and the inner wall of the shaft hole... An inclined hole is made to connect with an exhaust port, and the inner extension line of the inclined hole is not interfered with the inner wall of the shaft hole. In this way, the demolding direction of the shaft hole and the exhaust port is consistent during the casting and demolding process of the pump casing, which helps to reduce the process cost. At the same time, when drilling the inclined hole, the drill bit can be directly and conveniently inserted from the outside of the shaft hole for opening operation without interfering with other structures of the casing, which greatly reduces the process cost. In addition, a small amount of coolant that enters through the water seal can enter the exhaust port through the inclined hole and finally be discharged in the form of steam to avoid corrosion and ensure the service life.

[0009] In the water pump housing of the aforementioned engine, the edge of the shaft hole opening is chamfered. This facilitates the avoidance of the drill bit used to machine the first inclined hole, ensuring machining safety. It also allows for a deeper inner end of the first inclined hole, ensuring sufficient space for the water seal component and guaranteeing the water seal effect.

[0010] In the water pump housing of the aforementioned engine, the outer periphery of the housing also has a second exhaust port parallel to the shaft hole. The inner wall of the shaft hole has a second oblique hole arranged radially from the inside out towards the side away from the flange. The outer end of the second oblique hole communicates with the second exhaust port, and the axial extension line of the inner end of the second oblique hole can pass through the end opening of the shaft hole. This similar arrangement of the second oblique hole and thus the second exhaust port effectively controls process costs while providing balanced air pressure to the first exhaust port, ensuring smooth discharge of internal coolant vapor and extending service life.

[0011] In the water pump housing of the aforementioned engine, the first and second inclined holes are arranged axially spaced along the shaft hole. This arrangement facilitates the design of alternating the vertical arrangement of the first and second inclined holes during installation, thereby reducing airflow interference and ensuring stable and smooth steam depressurization.

[0012] In the water pump housing of the aforementioned engine, the side of the flange has a water outlet channel arranged in a figure-6 shape around the shaft hole. The inclined guide is located at the outlet of the water outlet channel, and the inclined guide has a guide arc surface that curves upwards in the direction of water flow from the outlet channel away from the flange. The slope of the guide arc surface changes smoothly, allowing the water flow to deflect smoothly.

[0013] In the water pump casing of the aforementioned engine, the width of the guide arc surface gradually increases along the water outlet direction of the outlet channel. This not only changes the coolant flow direction but also achieves a diffusion effect, making the flow more stable and helping to protect the impeller structure.

[0014] Compared with the prior art, the advantages of this utility model are as follows:

[0015] The water pump housing of this engine has a low cost for demolding and subsequent processing while ensuring its service life, thus balancing the water pump's service life and manufacturing cost. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of this embodiment.

[0017] Figure 2 yes Figure 1 A schematic diagram of the AA cross-sectional structure.

[0018] Figure 3 This is a schematic diagram of the rear view structure in this embodiment.

[0019] Figure 4 yes Figure 3 A schematic diagram of the BB cross-sectional structure.

[0020] In the figure, 1 is the shell; 11 is the shaft hole; 12 is the flange; 121 is the inclined guide; 1211 is the guide arc surface; 122 is the water outlet channel; 13 is the first vent hole; 14 is the first inclined hole; 15 is the second vent hole; and 16 is the second inclined hole. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] like Figure 1-2As shown, the water pump housing of this engine includes a cylindrical housing 1, which is a casting. One end of the housing 1 has an axially penetrating shaft hole 11, and the other end of the housing 1 has a flange portion 12 arranged in an annular disc shape around the shaft hole 11. The side of the flange portion 12 has an inclined guide portion 121 for changing the water outlet direction. The outer periphery of the housing 1 also has an exhaust hole 13 parallel to the shaft hole 11. The inner wall of the shaft hole 11 has an inclined hole 14 that is radially inclined from the inside to the outside towards the side opposite to the flange portion 12. The outer end of the inclined hole 14 is connected to the exhaust hole 13. The axial extension line of the inner end of the inclined hole 14 can pass through the end opening of the shaft hole 11. Furthermore, the outer periphery of the housing 1 also has a second vent 15 parallel to the shaft hole 11. The inner wall of the shaft hole 11 has a second oblique hole 16 that is radially inclined from the inside out toward the side opposite to the flange portion 12. The outer end of the second oblique hole 16 communicates with the second vent 15, and the axial extension line of the inner end of the second oblique hole 16 can also pass through the end opening of the shaft hole 11. The first oblique hole 14 and the second oblique hole 16 are arranged symmetrically around the center of the shaft hole 11, and their centerlines intersect to form an angle of 120 degrees. Preferably, the open edge of the shaft hole 11 is chamfered.

[0023] like Figure 3-4 As shown, the side of the flange 12 has a water outlet channel 122 arranged in a figure-6 shape around the shaft hole 11. The inclined guide 121 is located at the outlet of the water outlet channel 122. The surface of the inclined guide 121 has a guide arc surface 1211 that is raised in the direction of water outlet of the water outlet channel 122 away from the side where the flange 12 is located. The width of the guide arc surface 1211 gradually increases along the direction of water outlet.

[0024] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A water pump housing for an engine, comprising a cylindrical housing (1), one end of which has a through shaft hole (11), and the other end of which has a flange portion (12) arranged circumferentially around the shaft hole (11) in an annular disc shape, the side of which has an inclined guide portion (121) for changing the water outlet direction, characterized in that, The outer periphery of the housing (1) also has an exhaust hole (13) parallel to the shaft hole (11). The inner wall of the shaft hole (11) has an inclined hole (14) that is radially inclined from the inside out toward the side away from the flange (12). The outer end of the inclined hole (14) is connected to the exhaust hole (13). The axial extension line of the inner end of the inclined hole (14) can pass through the end opening of the shaft hole (11).

2. The water pump housing of the engine according to claim 1, characterized in that, The open edge of the shaft hole (11) is chamfered.

3. The water pump housing of the engine according to claim 1 or 2, characterized in that, The outer periphery of the housing (1) also has an exhaust hole (15) parallel to the shaft hole (11). The inner wall of the shaft hole (11) has an inclined hole (16) that is radially inclined from the inside out toward the side away from the flange (12). The outer end of the inclined hole (16) communicates with the exhaust hole (15). The axial extension line of the inner end of the inclined hole (16) can pass through the end opening of the shaft hole (11).

4. The water pump housing of the engine according to claim 3, characterized in that, The first oblique hole (14) and the second oblique hole (16) are arranged circumferentially along the shaft hole (11).

5. The water pump housing of the engine according to claim 1, characterized in that, The flange (12) has a water outlet channel (122) arranged in a "6" shape around the shaft hole (11) on its side. The inclined guide (121) is located at the outlet of the water outlet channel (122). The inclined guide (121) has a guide arc surface (1211) that is raised in the direction of water outlet of the water outlet channel (122) away from the flange (12).

6. The water pump housing of the engine according to claim 5, characterized in that, The width of the guide arc surface (1211) gradually increases along the water outlet direction of the water outlet channel (122).

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