CN206830524U - Cavitation-preventive water pump cover for engine water pump - Google Patents

Abstract

The utility model discloses an anti-cavitation water pump cover for an engine water pump, which comprises a water pump cover body on which an anti-cavitation component is arranged; the anti-cavitation component communicates with water circulation for storing the water pump The air bubbles generated by the internal liquid circulation; by setting the anti-cavitation components on the water pump cover, the small air bubbles in the water channel will enter the anti-cavitation components during the rotation of the pump, so as to avoid damage to the flow-passing parts and avoid noise and vibration, effectively guarantee the performance of the water pump, and at the same time, it is also beneficial to improve the heat exchange law of the cooling water. Servicing the engine.

Description

Anti-cavitation water pump cover for engine water pump

technical field

The invention relates to an engine water pump, in particular to an anti-cavitation water pump cover for the engine water pump.

Background technique

During the working process of the engine, the water pump needs to run to circulate the coolant continuously, and take away the heat of the engine, so as to avoid excessive temperature, damage parts, and cause the engine to not work normally. However, during the operation of the pump, cavitation will occur under certain conditions. The cavitation of the water pump is caused by the vaporization of water. Vaporization is the process by which water changes from a liquid state to a gaseous state. The pressure when the liquid vaporizes is the vaporization pressure of the liquid (saturated vapor pressure), and the vaporization pressure of the liquid is related to the temperature. The higher the temperature, the more intense the molecular motion. The higher its vapor pressure is. The vaporization pressure of water at room temperature at 20°C is 233.8Pa, while that of water at 100°C is 101296P8 (1 atmosphere). Therefore, when the pressure drops to 233.8Pa, clear water at normal temperature (20°C) will start to vaporize. It can be seen that at a certain temperature, pressure is an external factor that promotes the vaporization of a liquid. When the liquid is at a certain temperature and the pressure is reduced to the vaporization pressure at that temperature, the liquid will produce bubbles. This phenomenon of generating bubbles is called cavitation. However, the gas in the bubble is actually not completely steam, but also includes the gas (mainly air) in the form of dissolution or nucleation. The gas dissolved in the liquid enters the bubbles due to diffusion, which will promote the growth of the bubbles. When the bubbles generated during cavitation flow to a high pressure place, their volume decreases so that they burst. This phenomenon of gas bubbles disappearing in a liquid due to pressure rise is called cavitation collapse. After the cavitation of the water pump, in addition to the damage to the flow-passing parts, it will also generate noise and vibration, and cause the performance of the water pump to decline. In severe cases, the liquid in the water pump will be interrupted and cannot work normally, so that the engine cannot effectively dissipate heat. , Accident damage occurred. In the prior art, in order to prevent cavitation, the following measures are adopted in the mechanism of the water pump: 1. Adopt double-suction impeller; 2. Increase the impeller inlet area; 3. Increase the blade inlet side width; 4. Increase the impeller The radius of curvature at the turning point of the front and rear cover plates; 5. The inlet edge of the blade extends to the suction side; 6. The first stage of the impeller is made of anti-cavitation material; 7. A front inducer is provided. For the existing water pumps, the measures to prevent cavitation are: 1. The rate of change of the cross-section of the flow part should be as small as possible, and the wall surface should be smooth; 2. The resistance of the suction pipe should be small, and it should be short and straight; Cavitation areas are patched with epoxy paint. The above-mentioned measures all have the problems of complex structure, insignificant anti-cavitation effect, and high improvement cost.

Contents of the invention

In view of this, the object of the present invention is to provide an anti-cavitation water pump cover for an engine water pump. By setting an anti-cavitation member on the water pump cover, the small air bubbles in the water channel can enter the anti-cavitation pump during the rotation of the water pump. In the component, avoid damage to the flow-passing parts, avoid noise and vibration, and effectively ensure the performance of the water pump. At the same time, it is also conducive to improving the heat exchange law of the cooling water. The structure is simple and the effect is obvious, which can effectively prevent and reduce Water pump cavitation guarantees the quality and performance of the engine water pump and provides better service for the engine.

The anti-cavitation water pump cover for the engine water pump of the present invention comprises a water pump cover body, and an anti-cavitation member is arranged on the water pump cover body;

Further, the anti-cavitation component communicates with the water circulation for storing the air bubbles generated by the liquid circulation in the water pump;

Further, the anti-cavitation component includes an anti-cavitation groove and a gas storage chamber communicating with the anti-cavitation groove for storing air bubbles;

Further, the anti-cavitation groove is arranged at the water outlet of the water pump cover body;

Further, the anti-cavitation groove and the air storage chamber are integrally located on the top of the water circulation channel;

Further, the anti-cavitation groove, the side wall of the air storage chamber and the water pump casing jointly form a closed cavity connected with water circulation;

Further, the air bubbles in the anti-cavitation groove enter the gas storage chamber along a horizontal slope;

Further, the diameter of the anti-cavitation groove is set smaller than that of the gas storage chamber;

Further, the cross-sectional diameter of the air inlet end of the air storage chamber is set larger than the cross-sectional diameter of the blind end of the air storage chamber;

Further, chamfers are provided at the connecting ends of the anti-cavitation groove and the water circulation channel.

Beneficial effects of the present invention: the anti-cavitation water pump cover body used for the engine water pump of the present invention, by setting the anti-cavitation member on the water pump cover body, the small air bubbles in the water channel can enter the anti-cavitation member during the rotation of the water pump Inside, avoid damage to the flow-passing parts, avoid noise and vibration, and effectively ensure the performance of the water pump. At the same time, it is also conducive to improving the heat exchange law of the cooling water. The structure is simple and the effect is obvious, which can effectively prevent and reduce the water pump. Cavitation ensures the quality and performance of the engine water pump and provides better service for the engine.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the water circulation structure of the water pump of the present invention.

detailed description

Fig. 1 is a schematic structural view of the present invention; Fig. 2 is a schematic view of the water circulation structure of the water pump of the present invention, as shown in the figure: the anti-cavitation water pump cover body for the engine water pump of the present invention includes the water pump cover body 1, in the The water pump cover body 1 is provided with an anti-cavitation component; by arranging the anti-cavitation component on the water pump cover body 1, cavitation can be avoided and reduced.

In this embodiment, the anti-cavitation component communicates with the water circulation to store the air bubbles generated by the liquid circulation in the water pump; during the rotation of the water pump, the small air bubbles in the water channel enter the anti-cavitation component to avoid damage to the flow-through components. It will have a destructive effect, avoid noise and vibration, and effectively ensure the performance of the water pump. At the same time, it is also conducive to improving the heat exchange law of the cooling water.

In this embodiment, the anti-cavitation component includes an anti-cavitation tank 2 and an air storage chamber 3 communicating with the anti-cavitation tank 2 for storing air bubbles; the anti-cavitation tank 2 is connected with the water channel of the water pump, and the liquid in the pump generates The water bubbles enter the air storage chamber 3 with the anti-cavitation groove 2. During the rotation of the pump, the small air bubbles in the water channel will gradually be stored in the air storage chamber 3 of the water pump cover body 1 through the anti-cavitation groove 2, which is beneficial Improve the heat exchange law of cooling water.

In this embodiment, the anti-cavitation groove 2 is arranged at the water outlet of the water pump cover body 1 to avoid cavitation.

In this embodiment, the anti-cavitation groove 2 and the air storage chamber 3 are located on the top of the water circulation channel as a whole; that is, after the engine water pump is installed, the anti-cavitation groove 2 and the air storage chamber 3 are located on the top of the water circulation channel as a whole Therefore, the liquid in the water pump will not enter the anti-cavitation groove 2 and the air storage chamber 3, and only the air bubbles generated by the internal circulation of the water pump will enter the anti-cavitation groove 2 and the air storage chamber 3, so as to avoid It will have a destructive effect on the flow-through parts, effectively guarantee the performance of the water pump, and at the same time, it is also beneficial to improve the heat exchange law of the cooling water.

In this embodiment, the anti-cavitation groove 2 and the side wall of the air storage chamber 3 together with the water pump housing form a closed cavity connected with water circulation; the anti-cavitation groove 2 and the air storage chamber 3 form a closed air flow Channels can effectively ensure the tightness of the water pump, effectively reduce and avoid the occurrence of cavitation, avoid damage to the flow-passing parts, and avoid noise and vibration.

In this embodiment, the air bubbles in the anti-cavitation groove 2 enter the gas storage chamber 3 obliquely horizontally; the gas outlet end of the anti-cavitation groove 2 and the opposite side of the gas storage chamber 3 have an included angle of an acute angle , so that no backflow will occur after the water bubbles enter the air storage chamber 3, and the water bubbles enter the air storage chamber 3 with a certain inclination and then quickly contact the side wall of the air storage chamber 3, so that the water bubbles are eliminated or continue to move towards the tail of the air storage chamber 3, avoiding The air bubbles in the air storage chamber 3 flow back into the water circulation channel. In order to strengthen the structural strength of the gas storage chamber 3, reinforcing ribs can be provided on the side walls of the gas storage chamber 3, and the reinforcing ribs are distributed vertically at equal intervals along the side walls.

In this embodiment, the diameter of the anti-cavitation groove 2 is smaller than that of the gas storage chamber 3 ; it is convenient for the circulation of air bubbles and also prevents the air bubbles from flowing back into the circulation channel.

In this embodiment, the cross-sectional diameter of the air inlet end of the air storage chamber 3 is set larger than the cross-sectional diameter of the blind end of the air storage chamber 3; the flow rate of the air inlet of the air storage chamber 3 is accelerated, and the air inlet of the air storage chamber 3 is effectively reduced. resistance to avoid backflow.

In this embodiment, the connecting end of the anti-cavitation groove 2 and the water circulation channel is provided with a chamfer, so that the air bubbles generated by the water circulation can enter the flow channel of the anti-cavitation groove 2 and reduce the resistance of circulation.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (8)

1. An anti-cavitation water pump cover for an engine water pump, characterized in that: it comprises a water pump cover body, on which an anti-cavitation member is provided; said anti-cavitation member includes an anti-cavitation groove and The air storage chamber communicates with the anti-cavitation tank for storing air bubbles; the anti-cavitation component communicates with the water circulation for storing air bubbles generated by the liquid circulation in the water pump. 2. The anti-cavitation water pump cover for an engine water pump according to claim 1, wherein the anti-cavitation groove is arranged at the water outlet of the water pump cover body. 3. The anti-cavitation water pump cover for the engine water pump according to claim 2, characterized in that: the anti-cavitation groove and the air storage chamber are integrally located on the top of the water circulation channel. 4. The anti-cavitation water pump cover for the engine water pump according to claim 3, characterized in that: the anti-cavitation groove, the side wall of the air storage chamber and the water pump housing together form a closed cavity communicated with water circulation . 5 . The anti-cavitation water pump cover for an engine water pump according to claim 4 , wherein the air bubbles in the anti-cavitation groove enter the air storage chamber along a horizontal slope. 6 . 6. The anti-cavitation water pump cover for an engine water pump according to claim 5, characterized in that: the diameter of the anti-cavitation groove is smaller than that of the air storage chamber. 7 . The anti-cavitation water pump cover for an engine water pump according to claim 6 , characterized in that: the cross-sectional diameter of the air inlet end of the air storage chamber is set larger than the cross-sectional diameter of the blind end of the air storage chamber. 8 . The anti-cavitation water pump cover for an engine water pump according to claim 7 , wherein the connecting end between the anti-cavitation groove and the water circulation channel is provided with a chamfer.