JPH0247280Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an impeller for a water pump for an internal combustion engine using a water-cooled system, and specifically, an impeller that does not protect the bearing part and can increase the liquid discharge flow rate. It concerns shape improvement.

[Prior Art] Conventionally, impellers for water pumps inside automobile engines, etc., are mostly made of thin metal plates that are press-tightened and provided with vane pawls 1, as shown in Fig. 5. Feather member A and modeling/
It is formed by combining a flat disc 4 with a simple shape that is easy to assemble and weld, and the role of the flat disc 4 here is to integrate with the blade member A in order to withstand the strong water pressure that the rotating impeller receives. It has the purpose of reinforcing the blade to increase its strength and preventing water flow from escaping from the notch 3 where the blade pawl 1 was formed, thereby increasing the flow rate.

[Problems to be Solved by the Invention] However, the provision of the flat disc 4 has resulted in more inconveniences. In the above structure, the flat disk 4 is often provided on the mechanical seal E side of the sealing material between the shaft 5 and the housing 6 in order to adjust the flow of liquid, as shown in Fig. 5. The structure is such that the mechanical seal E is covered by the flat disk 4, so that the liquid near the mechanical seal E hardly flows during operation. In this case, the same liquid stays in the same place and absorbs the frictional heat generated by the sliding part _E1 of the rotating mechanical seal E, so the sliding part _E1 is forced to operate at a high temperature, significantly shortening its lifespan. I shorten it.

In addition, foreign matter and the like tend to accumulate in this retention area, and the operating conditions in which the sliding portion _E1 is placed are extremely severe.

The present invention eliminates these drawbacks and provides an impeller that increases the liquid discharge flow rate and greatly improves the life of the mechanical seal.

[Means for Solving the Problems] As shown in FIGS. 1 and 2, the present invention includes a blade member A formed by cutting and bending a disc material to form a plurality of blade claws 1 at equal intervals; An impeller D for a water pump is made by overlapping the blade member A with an auxiliary disk B that assists, and combining these with a boss portion C, in which the auxiliary disk B is drawn and protrudes from one or both sides thereof. It is characterized in that a plurality of convex portions 2 are provided.

At this time, as shown in FIGS. 3 and 4, it is preferable for the convex portion 2 to overlap at a position where it fits into the notch 3, which is the formation mark of the wing claw 1, as this will produce the excellent effect described later. .

[Function] The above structure prevents water from stagnation in the entire vicinity of the impeller D, and greatly improves the discharge flow rate.

That is, when the convex part 2 is provided, the convex part 2 that protrudes as the impeller D rotates acts as a blade and stirs the liquid on that surface side. The agitated liquid reaches the mechanical seal E located in the vicinity and causes the liquid to flow not only through the sliding portion _E1 but also at the inner part.

In order to make this agitation a single flow, the shape of the convex portions 2 can be arranged in a spiral or radial manner, for example, to easily provide directionality, and to create a flow that allows foreign matter to be discharged from the mechanical seal E. That's easy.

When joining these, if the convex portion 2 is provided on the opposite side of the blade member A as shown in Fig. 1, it is joined so that it is at the same position as the notch 3 of the blade member A where the blade pawl 1 is formed. As a result, the concave space formed on the back side of the convex portion 2 has a great effect of increasing the space volume between the blade claws 1 and therefore increasing the discharge amount.

[Example] The convex portion 2 is fitted into the notch portion 3 formed by the protruding blade claw 1 on the side of the blade member A.
When the blade member A comes into close contact with the notch portion 3, the blade claw 1 has a structure that meshes and engages with the notch portion 3, so that even if the blade pawl 1 is subjected to strong water pressure, it exhibits a strong anti-rotation action. If the vane member A and the auxiliary disk B can be fixed together, another advantage arises in that it is not necessary to even fix the two members A and B together.

[Effects of the invention] As explained above, this invention has a simple structure that constantly stirs the liquid near the mechanical seal to promote heat dissipation, and also increases the discharge flow rate, which is the original role of the pump. This is a revolutionary and ideal impeller that has been extremely successful.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the impeller of the present invention. FIG. 2 is a sectional view of FIG. 1. FIG. 3 is a plan view showing another embodiment of the impeller of the present invention. FIG. 4 is a sectional view of FIG. 3. FIG. 5 is a sectional view of a conventional water pump with an impeller. A...Blade member, B...Auxiliary disk, D...Impeller,
E... Mechanical seal, 1... Feather claw, 2... Convex part,
3...Notch part.

Claims (1)

[Claims for Utility Model Registration] (1) A blade member A, which is formed by forming a plurality of blade claws 1 at equal intervals on a disc material, and an auxiliary disc B that assists the blade member A are overlapped, and this is formed into a boss part. In the impeller D for a water pump combined with C; the auxiliary disk B is subjected to a drawing process and a plurality of convex portions 2 protruding from one or both sides thereof are provided,
An impeller characterized in that the convex portion 2 is overlapped with the notch portion 3 formed by the blade claw 1 of the blade member A so as to be in the same position. (2) The impeller according to claim 1, wherein the convex portion 2 of the auxiliary disk B on the side of the blade member A is meshed and overlapped with the notch portion 3, thereby eliminating the need for fixation.