Opening ring structure of water pump
By setting slots and insertion rings on the pump body and impeller port annular surface of the water pump, a water body reflow gap is formed, which solves the problems of water leakage and return hedging in the existing water pump mouth ring structure, improves the volume efficiency and head of the water pump, and ensures the performance of the small flow area.
Patent Information
- Application Number
- CN202421886967.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-08-06
AI Technical Summary
The existing water pump port ring structure has a lower head under large flow conditions, and under high pressure water flow, part of the water body falls back into the pump body suction port through the gap between the pump port annular surface and the impeller port annular surface, affecting the performance and cavitation resistance of the small flow area.
A water pump port ring structure is designed, with slots on the pump port annular surface of the pump body, and a insert ring adapted to the slot is arranged on the impeller port annular surface of the impeller to form a water return gap drained towards the inlet end of the water body of the impeller, increasing the water return path, reducing leakage, and further reducing the risk of water entering the suction port through the sealing ring.
It effectively reduces the leakage of water, improves the volume efficiency of the water pump and the head of the large flow area, and avoids hedging between the return water body and the suction water body of the pump body, ensuring the performance and cavitation resistance of the water pump in small flow areas.
Smart Images
Figure CN222894420U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water pump structures, in particular to a mouth ring structure of a water pump. Background Art
[0002] A water pump is a machine that transports liquid or pressurizes liquid. Generally, it transmits mechanical energy directly to the liquid through the rotation of the impeller inside the pump body to increase the static and dynamic pressure energy of the liquid. However, the structure of the water pump mouth ring is as follows Figure 1 and Figure 2 As shown, since the impeller needs to rotate inside the pump body, in order to avoid adhesion between the impeller and the pump body, the gap between the pump port ring surface and the impeller port ring surface will be increased, and then sealed by a sealing ring. However, this method will increase the leakage risk between the pump port ring surface and the impeller port ring surface due to the increase in the gap, thereby reducing the volumetric efficiency of the water pump and causing a serious drop in head under high flow conditions. In addition, the current pump port ring structure is relatively simple, especially in the case of high-pressure water flow, part of the falling water will still enter the pump body suction port through the gap between the pump port ring surface and the impeller port ring surface, and collide with the water at the pump body suction port, affecting the performance and anti-cavitation performance of the water pump in the small flow area. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a water pump mouth ring structure, which can improve the water leakage between the pump mouth ring surface and the impeller mouth ring surface, and avoid the collision of the backflow water and the water at the pump body suction port.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a mouth ring structure of a water pump, including a pump body and an impeller arranged inside the pump body, characterized in that: the pump body has a pump mouth ring surface facing the impeller, and a slot is arranged on the pump mouth ring surface of the pump body; the impeller has an impeller mouth ring surface facing the pump mouth ring surface, and an insert ring adapted to the slot is arranged on the impeller mouth ring surface of the impeller, and a water reflux gap for diverting water toward the water inlet end of the impeller is formed between the insert ring and the slot.
[0005] Furthermore, the slot width gradually decreases toward the slot bottom.
[0006] Furthermore, the slot is an annular groove with a right-angled trapezoidal cross section, and the inner side wall of the slot close to the water inlet end of the impeller is an inclined surface inclined toward the water inlet end of the impeller.
[0007] Furthermore, an inner side wall of the slot at the water inlet end close to the impeller forms an angle of 20 to 40 degrees with an inner side wall of the slot at the water inlet end away from the impeller.
[0008] Furthermore, an inner side wall of the slot at the water inlet end close to the impeller forms an angle of 30 degrees with an inner side wall of the slot at the water inlet end away from the impeller.
[0009] Furthermore, a sealing ring is provided between the insert ring and the inner side wall of the water inlet end of the insert slot away from the impeller.
[0010] The beneficial effect of the utility model is that, different from the prior art, a slot is provided on the pump port ring surface of the pump body while satisfying the gap size between the pump port ring surface and the impeller port ring surface, and an insert ring that can be inserted into the slot is provided on the impeller port ring surface of the impeller, which can increase the path of water backflow to the pump body suction port, making it difficult for water to flow back to the pump body suction port through the gap between the pump port ring surface and the impeller port ring surface, thereby reducing the leakage of water, thereby increasing the volumetric efficiency of the water pump and improving the head in the large flow area. At the same time, a water backflow gap is formed between the insert ring and the slot to divert water toward the water inlet end of the impeller, so that the water flowing back to the suction port of the pump body will not collide with the water flowing from the suction port of the pump body toward the water inlet end of the impeller, thereby ensuring the performance and anti-cavitation performance of the water pump in the small flow area. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a cross-sectional structural diagram of an existing water pump;
[0012] Figure 2 for Figure 1 An enlarged view of part A of the cross-sectional structure diagram of an existing water pump;
[0013] Figure 3 This is a cross-sectional structural diagram of a mouth ring structure of a water pump proposed by the utility model;
[0014] Figure 4 for Figure 3 An enlarged view of part B of a cross-sectional structural diagram of a mouth ring structure of a water pump;
[0015] Description of labels:
[0016] 1. Pump body; 11. Slot; 2. Impeller; 21. Insert ring. DETAILED DESCRIPTION
[0017] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.
[0018] Please refer to Figure 3 and Figure 4As shown, the utility model is a water pump mouth ring structure, including a pump body 1 and an impeller 2 arranged inside the pump body 1, characterized in that: the pump body 1 has a pump mouth ring surface facing the impeller 2, and a slot 11 is arranged on the pump mouth ring surface of the pump body 1; the impeller 2 has an impeller mouth ring surface facing the pump mouth ring surface, and an insert ring 21 adapted to the slot 11 is arranged on the impeller mouth ring surface of the impeller 2, and a water reflux gap for diverting water toward the water inlet end of the impeller 2 is formed between the insert ring 21 and the slot 11.
[0019] Working principle: A slot 11 is provided on the pump port annular surface of the pump body 1, and an insert ring 21 that can be inserted into the slot 11 is provided on the impeller port annular surface of the impeller 2, which can increase the path for the water to flow back to the pump body suction port, making it difficult for the water to flow back to the suction port of the pump body 1 through the gap between the pump port annular surface and the impeller port annular surface, thereby reducing the leakage of the water, thereby increasing the volumetric efficiency of the water pump and improving the head in the large flow area. At the same time, a water reflux gap is formed between the insert ring 21 and the slot 11 to divert the water toward the water inlet end of the impeller 2, so that the water flowing back to the suction port of the pump body 1 will not collide with the water flowing from the suction port of the pump body 1 toward the water inlet end of the impeller 2, thereby ensuring the performance and anti-cavitation performance of the water pump in the small flow area.
[0020] Please refer to Figure 4 As shown, further, the slot width of the slot 11 gradually decreases toward the bottom of the slot.
[0021] It can be seen from the above description that during the assembly process, the insert ring 21 can be easily inserted into the slot 11.
[0022] In an optional implementation, please refer to Figure 4 As shown, the slot 11 is an annular groove with a right-angle trapezoidal cross section, and the inner side wall of the slot 11 close to the water inlet end of the impeller 2 is an inclined surface inclined toward the water inlet end of the impeller 2. It is beneficial for the reflux water to flow toward the water inlet end of the impeller 2.
[0023] According to the above optional implementation, please refer to Figure 4 As shown, the inner side wall of the water inlet end of the slot 11 close to the impeller 2 forms an angle C with the inner side wall of the water inlet end of the slot 11 away from the impeller 2. The angle C is preferably 20 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, etc.
[0024] Furthermore, a sealing ring (not shown in the figure) is arranged between the insert ring 21 and the inner side wall of the insertion slot 11 away from the water inlet end of the impeller 2 .
[0025] It can be seen from the above description that the sealing ring is used to further reduce the water entering the suction port of the pump body 1 through the water reflux gap.
[0026] Embodiment 1
[0027] A water pump mouth ring structure, please refer to Figure 3 and Figure 4 As shown, it includes a pump body 1 and an impeller 2 arranged inside the pump body 1, characterized in that: the pump body 1 has a pump inlet ring surface facing the impeller 2, and a slot 11 is arranged on the pump inlet ring surface of the pump body 1; the impeller 2 has an impeller inlet ring surface facing the pump inlet ring surface, and an insert ring 21 adapted to the slot 11 is arranged on the impeller inlet ring surface of the impeller 2, and a water body reflux gap for diverting toward the water body inlet end of the impeller 2 is formed between the insert ring 21 and the slot 11. The groove width of the slot 11 gradually decreases toward the bottom of the groove. The slot 11 is an annular groove with a right-angle trapezoidal cross section, and the inner side wall of the slot 11 near the water body inlet end of the impeller 2 is an inclined surface inclined toward the water body inlet end of the impeller 2. The inner side wall of the slot 11 near the water body inlet end of the impeller 2 forms a 30-degree angle with the inner side wall of the slot 11 away from the water body inlet end of the impeller 2. A sealing ring (not shown in the figure) is arranged between the insert ring 21 and the inner side wall of the insertion slot 11 away from the water inlet end of the impeller 2 .
[0028] Working principle: A slot 11 is provided on the pump port annular surface of the pump body 1, and an insert ring 21 that can be inserted into the slot 11 is provided on the impeller port annular surface of the impeller 2, which can increase the path for the water to flow back to the pump body suction port, making it difficult for the water to flow back to the suction port of the pump body 1 through the gap between the pump port annular surface and the impeller port annular surface, thereby reducing the leakage of the water, thereby increasing the volumetric efficiency of the water pump and improving the head in the large flow area. At the same time, a water reflux gap is formed between the insert ring 21 and the slot 11 to divert the water toward the water inlet end of the impeller 2, so that the water flowing back to the suction port of the pump body 1 will not collide with the water flowing from the suction port of the pump body 1 toward the water inlet end of the impeller 2, thereby ensuring the performance and anti-cavitation performance of the water pump in the small flow area.
[0029] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.
Claims
1. A water pump ring structure, comprising a pump body and an impeller arranged inside the pump body, characterized in that: The pump body has a pump port ring surface facing the impeller, and a slot is arranged on the pump port ring surface of the pump body; the impeller has an impeller port ring surface facing the pump port ring surface, and an insert ring adapted to the slot is arranged on the impeller port ring surface of the impeller, and a water reflux gap is formed between the insert ring and the slot for diverting water toward the water inlet end of the impeller.
2. The mouth ring structure of the water pump according to claim 1, characterized in that: The slot width gradually decreases toward the slot bottom.
3. The mouth ring structure of the water pump according to claim 2, characterized in that: The slot is an annular groove with a right-angle trapezoidal cross section, and the inner side wall of the slot close to the water inlet end of the impeller is an inclined surface inclined toward the water inlet end of the impeller.
4. The mouth ring structure of the water pump according to claim 3, characterized in that: The inner side wall of the slot at the water inlet end close to the impeller forms an angle of 20 to 40 degrees with the inner side wall of the slot at the water inlet end far from the impeller.
5. The mouth ring structure of the water pump according to claim 4, characterized in that: The inner side wall of the slot at the water inlet end close to the impeller forms an angle of 30 degrees with the inner side wall of the slot at the water inlet end far from the impeller.
6. The mouth ring structure of the water pump according to claim 1, characterized in that: A sealing ring is arranged between the insert ring and the inner side wall of the water inlet end of the inserting slot away from the impeller.