Improved structure of water pump for automobile cooling system

Abstract

The utility model discloses an improved structure's water pump structure for automobile cooling system, including pump body and pump base, pump body and pump base fixed mounting, there is centrifugal pump cavity in the pump base, and the water supply channel and the water outlet are processed in this pump base cavity, its characterized in that: the water supply channel processing formation has in the pump base cavity inner whirl annular channel and slide -type flow channel, and inner whirl annular channel and slide -type flow channel smooth transition, and the outlet of slide -type slide -way and the bottom of water outlet form height difference, and the width of slide -type flow channel gradually increases from the butt joint of inner whirl annular channel to the water outlet direction flow channel, and forms the structure of inside narrow and lower wide. The design cancels the assembly structure of pump head column body and the counterbore in the pump base, and directly processes the inner whirl annular channel and slide -type flow channel in the pump base cavity, fundamentally eliminates the difficult problem of sealing ring aging replacement, simultaneously optimizes flow channel structure, and improves the flow efficiency of coolant and the working performance of pump.

Description

Technical Field

[0001] This utility model relates to the field of automotive engine water pumps, and in particular to an improved structure for an automotive cooling system water pump. Background Technology

[0002] The automotive engine cooling system is a crucial component ensuring the engine operates efficiently and stably within a suitable temperature range. The coolant pump, as the core power component of this system, is responsible for driving the coolant (usually a mixture of water and antifreeze) to circulate between high-temperature components such as the engine block and cylinder head, and the radiator, continuously removing excess heat. Its reliability, efficiency, and durability directly affect the overall performance and lifespan of the engine.

[0003] On March 3, 2026, the company filed a patent application with application number 202620251962.2 and publication number CN224093584U. This utility model discloses a water pump assembly for an automotive cooling system, including a pump head, a pump base, and an impeller installed inside the pump head. An integrally formed column is assembled on one side of the pump head, and the inside of the column is cast with a docking flow channel. The pump base has a centrifugal pump chamber, and a water supply channel and a water outlet are machined in the pump base chamber. There is an inner countersunk hole for mounting the column between the water supply channel and the water outlet. After the pump head column assembly is installed, one side of the column's docking flow channel is smoothly connected to the water supply channel, and the other side is smoothly connected to the water outlet, forming an unobstructed internal flow channel structure.

[0004] The pump head has an integrally formed column on one side, and an inner countersunk hole for mounting the column is machined between the water supply channel and the outlet. The disadvantage of this structure is that a sealing ring needs to be installed in the inner countersunk hole. However, the sealing ring will age over time and needs to be replaced. The main problem is that the sealing ring in the inner countersunk hole is difficult to replace and remove, which makes maintenance inconvenient. There is an urgent need in the art for a new type of automotive engine cooling water pump structure that can fundamentally solve the above problems.

[0005] To address the aforementioned shortcomings, this utility model proposes an improvement. Utility Model Content

[0006] This utility model proposes an improved water pump structure for automotive cooling systems. It eliminates the assembly structure of the pump head column and the inner countersunk hole of the pump seat, and directly processes the inner spiral annular channel and the slide-type flow channel in the pump seat cavity. This fundamentally eliminates the problem of difficult replacement of aging seals, while optimizing the flow channel structure and improving the flow efficiency of coolant and the working performance of the pump.

[0007] The technical solution of this utility model is implemented as follows: An improved automotive cooling system water pump structure includes a pump body and a pump base, with the pump body and pump base fixedly installed. The pump base contains a centrifugal pump chamber, within which a water supply channel and an outlet are machined. The water supply channel within the pump base chamber is characterized by forming an inner swirling annular channel and a slide-type channel, with a smooth transition between the inner swirling annular channel and the slide-type channel. A height difference is formed between the outlet of the slide-type channel and the bottom of the outlet. The width of the slide-type channel gradually increases from the junction of the inner swirling annular channel towards the outlet, forming a structure that is narrower at the inside and wider at the bottom.

[0008] Preferably, the inner spiral annular channel has a U-shaped or V-shaped structure.

[0009] Preferably, the sides of the slide-type flow channel and / or the inner spiral annular channel are arc-shaped to form arc-shaped sidewalls.

[0010] In summary, the beneficial effects of this utility model are as follows: the original split flow regulation structure, which includes an independent movable valve core and a valve chamber cover, is improved into an integrated fixed flow channel that is directly machined inside the pump body. Cancel the dynamic sealing ring between the movable valve core and the valve cavity, and the static sealing ring between the valve cavity end cover and the pump body; The shape of the fixed flow channel is optimized to make its inner wall transition smoothly and eliminate internal steps.

[0011] Compared with the prior art, this utility model has the following advantages: This invention eliminates the assembly structure of the pump head column and the inner countersunk hole in the prior art, and eliminates the need to install a sealing ring between the column and the inner countersunk hole. This completely eliminates the technical defects of inconvenient maintenance and difficulty in replacement caused by the aging of the sealing ring, greatly reduces maintenance costs and difficulty, and improves the service life and reliability of the water pump.

[0012] By directly machining an inner spiral annular channel and a slide-type flow channel inside the pump seat cavity and making the transition between the two smoothly, fluid resistance is reduced, and the flow of coolant is made smoother. The width of the slide-type flow channel gradually increases from the joint of the inner spiral annular channel towards the outlet, forming a structure that is narrow at the inside and wide at the bottom. This is conducive to the smooth diffusion and accelerated discharge of coolant under the action of centrifugal force, thus improving pump efficiency.

[0013] The slide-type track creates a height difference between the bottom of the outlet and the water outlet, using gravity to assist in the discharge of coolant, reducing liquid accumulation and further improving the smoothness of the flow channel and the working efficiency of the pump.

[0014] The sides of the slide-type flow channel and / or the inner swirling annular channel are treated with arc shape to form arc-shaped sidewalls, which effectively reduces eddy currents and impact losses during fluid flow, reduces noise and vibration, and improves the overall performance and operational stability of the water pump.

[0015] In summary, this utility model integrates the flow channel directly into the pump seat cavity in a single process, reducing the number of parts and assembly steps, simplifying the production process, and helping to reduce manufacturing costs and improve product consistency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the water pump structure of the improved automotive cooling system according to this utility model; Figure 2 This is a schematic diagram of the water outlet of this utility model; Figure 3 This utility model Figure 2 A magnified view of a portion of point I in the middle; Figure 4 This is a schematic diagram of the water supply channel.

[0018] In the diagram: 1. Pump body; 2. Pump base; 3. Centrifugal pump chamber; 4. Water supply channel; 5. Water outlet; 6. Inner swirling annular channel; 7. Slide-type channel; 8. Arc-shaped sidewall; 71. Outlet. Detailed Implementation

[0019] The following will refer to the appendix in the embodiments of this utility model. Figure 1-4 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Example

[0020] like Figures 1-4 As shown in the figure, this embodiment discloses an improved water pump structure for an automotive cooling system, including a pump body 1 and a pump base 2. The pump body 1 and the pump base 2 are fixedly installed by bolts or other conventional fixing methods. The pump base 2 is provided with a centrifugal pump chamber 3, and a water supply channel 4 and a water outlet 5 are machined in the pump base 2 chamber.

[0021] The core improvement of this utility model lies in the fact that the water supply channel 4 inside the pump base 2 cavity is machined into an inner swirling annular channel 6 and a slide-type channel 7, with a smooth transition connection between the inner swirling annular channel 6 and the slide-type channel 7. A certain height difference A is formed between the outlet 71 of the slide-type channel 7 and the bottom of the outlet 5. This height difference facilitates the smooth discharge of coolant under gravity, reducing liquid accumulation. Simultaneously, the width of the slide-type channel 7 gradually increases from the joint of the inner swirling annular channel 6 towards the outlet 5, forming a narrow inner and wide lower structure. This structural design conforms to the fluid dynamics characteristics of a centrifugal pump, enabling the coolant to gradually diffuse and smoothly accelerate during flow, effectively reducing flow resistance and improving water output efficiency.

[0022] In this embodiment, the inner swirling annular channel 6 has a U-shaped or V-shaped structure, which can guide the coolant from the impeller to smoothly transition to the slide-type flow channel 7 along the annular path, reducing fluid impact and energy loss.

[0023] To further optimize fluid performance, the sides of the slide-type flow channel 7 and / or the inner swirling annular channel 6 are curved to form curved sidewalls 8. The design of the curved sidewalls 8 can effectively eliminate sharp corners in the flow channel, reduce eddy current generation, reduce flow noise and vibration, and make the coolant flow smoother and more efficient.

[0024] This invention eliminates the assembly structure of the pump head column and the countersunk hole in the pump seat, thus eliminating the need for a sealing ring and fundamentally solving the technical problems of difficult replacement and maintenance of the aging sealing ring. Simultaneously, by optimizing the flow channel structure within the pump seat cavity, it achieves efficient, low-resistance, and low-noise coolant delivery, significantly improving the performance and service life of the automotive engine coolant pump.

[0025] The above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. An improved automotive cooling system water pump structure, comprising a pump body and a pump base, wherein the pump body and the pump base are fixedly installed, and the pump base contains a centrifugal pump chamber, within which a water supply channel and a water outlet are machined, characterized in that: The water supply channel inside the pump seat cavity is machined into an inner swirling annular channel and a slide-type channel. The inner swirling annular channel and the slide-type channel transition smoothly. The outlet of the slide-type channel and the bottom of the water outlet form a height difference. The width of the slide-type channel gradually increases from the joint of the inner swirling annular channel towards the water outlet, forming a structure that is narrow at the inside and wide at the bottom.

2. The improved automotive cooling system water pump structure according to claim 1, characterized in that: The inner spiral annular channel has a U-shaped or V-shaped structure.

3. The improved automotive cooling system water pump structure according to claim 1 or 2, characterized in that; The sides of the slide-type flow channel and / or the inner spiral annular channel are curved to form arc-shaped sidewalls.

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