Engine mechanical water pump shell

Abstract

The utility model discloses an engine mechanical water pump shell which comprises a water pump shell body, a shaft hole is formed in the front end of the water pump shell body, and a water storage cavity is formed in the rear end of the water pump shell body. An axial water vapor flow channel groove is formed in the position, close to the water storage cavity, of the hole wall of the shaft hole, a radial drain hole is formed in the hole wall of the shaft hole, the drain hole is communicated with the water vapor flow channel groove, and an expansion groove is formed in the position, close to the water vapor flow channel groove, of the bottom of the drain hole. The evaporation rate of the water storage cavity of the mechanical water pump is effectively improved, meanwhile, the problem that an existing water leakage observation hole structure is prone to being blocked by dust is solved, the failure rate of the bearing can be reduced, and benefits of a company are improved.

Description

Technical Field

[0001] This utility model belongs to the field of engine mechanical water pumps, and in particular to an engine mechanical water pump housing. Background Technology

[0002] like Figure 1 As shown, the existing engine mechanical water pump structure mainly includes a water pump housing 1, an impeller shaft 2, a water seal 3, an impeller 4, and a pulley 5. The impeller shaft is installed in the front shaft hole 6 of the water pump housing. An annular water storage cavity 7 is provided in the rear end of the water pump housing. A water seal for sealing the opening of the water storage cavity is fitted onto the impeller shaft. The rear end of the impeller shaft passes through the water storage cavity and connects to the impeller. The front end of the impeller shaft connects to the pulley. A leakage observation hole 8 is provided on the front end face of the water pump housing, which is a through hole communicating with the water storage cavity. To reduce the false leakage rate, a larger water storage cavity volume structure is currently commonly used in water pump housing designs, and the leakage observation hole is hidden inside the pulley. For more compact water pumps, the water storage cavity is designed as an annular structure; the leakage observation hole is designed as a cylinder. Although the annular structure of the water storage cavity increases the effective storage volume, it also leads to a higher concentration of water vapor generated by the coolant in the water storage cavity.

[0003] The design of the leakage observation hole must simultaneously meet the requirements of venting water vapor from the water storage chamber and reducing the entry of environmental dust into the pump. Therefore, the hole diameter cannot be designed to be too large (generally φ5~φ8mm). This results in a slower rate of steam emission from the water storage chamber to the environment. Consequently, the rubber seals on the bearing end face of the impeller shaft are constantly exposed to high concentrations of coolant water vapor, leading to aging of the bearing rubber seals, reduced sealing performance, and water vapor entering the bearing. This causes the grease to gradually deteriorate, lose its lubricating properties, and the bearing rolling elements to wear and fail, increasing the after-sales compensation for the pump. At the same time, the round hole leakage observation hole is easily blocked by dust, preventing water vapor from escaping and accelerating this process. Utility Model Content

[0004] This invention proposes a mechanical water pump housing for an engine, which solves the problems of slow water vapor emission rate and easy clogging by dust in existing water leakage observation holes.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: an engine mechanical water pump housing, including a water pump housing, a shaft hole provided in the front end of the water pump housing, and a water storage cavity provided in the rear end of the water pump housing; characterized in that: an axial water vapor flow channel groove is provided on the wall of the shaft hole near the water storage cavity, a radial drain hole is provided on the wall of the shaft hole, the drain hole is connected to the water vapor flow channel groove, and an expansion groove is provided at the bottom of the drain hole near the water vapor flow channel groove.

[0006] The above technical solution is further specified in that the diameter of the discharge hole is 9-10 mm.

[0007] To further define the above technical solution, the bottom of the expansion tank is inclined.

[0008] A further improvement to the above technical solution is that a raised reinforcing part is provided on the outer side of the front end of the water pump housing along the periphery of the drain hole.

[0009] Beneficial effects: 1) This utility model adopts a radial discharge hole, which effectively controls the amount of dust entering; 2) The expansion groove in the discharge hole can further increase the internal space of the hole, making it less prone to dust blockage and easier for water vapor to be discharged; 3) This utility model effectively improves the evaporation rate of the water storage chamber of the mechanical water pump, while solving the problem that the existing leakage observation hole structure is easily blocked by dust, and can reduce the failure rate of bearings and improve the company's efficiency. Attached Figure Description

[0010] Figure 1 This is a structural diagram from the background technology.

[0011] Figure 2 This is a structural diagram of the utility model.

[0012] Figure 3 yes Figure 2 A sectional view.

[0013] Figure 4 This utility model is a three-dimensional Figure 1 .

[0014] Figure 5 This utility model is a three-dimensional Figure 2 .

[0015] Figure 6 This is an assembly drawing of this utility model. Detailed Implementation

[0016] like Figure 2 , Figure 3 ,and Figure 4 As shown, an engine mechanical water pump housing includes a water pump housing 1, a shaft hole 6 is provided in the front end of the water pump housing, and a water storage cavity 7 is provided in the rear end of the water pump housing; an axial water vapor flow channel groove 9 is provided on the shaft hole wall near the water storage cavity, and a radial drain hole 10 is provided on the shaft hole wall, the drain hole communicating with the water vapor flow channel groove, and a concave expansion groove 11 is provided on the bottom of the drain hole near the water vapor flow channel groove;

[0017] like Figure 2 , Figure 3 ,and Figure 4 As shown, the diameter of the discharge hole 10 is 9-10 mm; the radial arrangement can increase the diameter of the discharge hole, which is beneficial for the discharge of water vapor.

[0018] like Figure 2 , Figure 3 ,and Figure 4 As shown, the bottom of the expansion tank 11 is inclined; the inclined surface guides the water vapor, making it easier for the water vapor to be discharged; through evaporation tests, the evaporation rate is about 0.8 mL / h.

[0019] like Figure 5 As shown, furthermore, a raised reinforcing part 12 is provided on the outer side of the front end of the water pump housing along the periphery of the drain hole. This is to prevent cracks from appearing around the drain hole and to extend the service life.

[0020] Furthermore, the common right-angle side of the expansion tank, the water vapor flow channel, and the drain hole all adopt a rounded transition design.

[0021] like Figure 6 As shown, the water pump housing 1 designed according to this utility model is combined with the impeller shaft 2, water seal 3, impeller 4 and pulley 5 to form an engine water pump.

Claims

1. A mechanical water pump housing for an engine, comprising a water pump housing, a shaft hole provided in the front end of the water pump housing, and a water storage chamber provided in the rear end of the water pump housing; characterized in that: An axial water vapor flow channel groove is provided on the wall of the shaft hole near the water storage cavity. A radial discharge hole is provided on the wall of the shaft hole, which is connected to the water vapor flow channel groove. An expansion groove is provided at the bottom of the discharge hole near the water vapor flow channel groove.

2. The engine mechanical water pump housing according to claim 1, characterized in that: The diameter of the drain hole is 9-10 mm.

3. The engine mechanical water pump housing according to claim 1, characterized in that: The bottom of the expansion tank is inclined.

4. The engine mechanical water pump housing according to claim 1, characterized in that: The pump housing has a raised reinforcing part on the outer side of the front end, around the drain hole.

Images