Engine water pump

Abstract

The utility model provides an engine water pump and relates to the technical field of internal combustion engines. The engine water pump comprises a water pump shell internally provided with a cavity, a rotating shaft is coaxially arranged on the water pump shell in a penetrating mode, an impeller is arranged at the end, extending out of the inner cavity of the water pump shell, of the rotating shaft, and the part, located in the cavity, of the rotating shaft is connected with the water pump shell through a coupling bearing and a water seal. At least four turbulent flow ribs are arranged on the end face of the side, close to the impeller, of the water pump shell around the cavity in an annular array mode. One end of the water seal extends to the position between the turbulent flow ribs, first flow guide grooves are formed in the turbulent flow ribs, second flow guide grooves are formed in the water pump shell and extend out of the impeller, and the first flow guide grooves are communicated with the second flow guide grooves. A flow guide boss is further arranged on the end face of the water pump shell, and first flow guide grooves are formed in the portions, close to the flow guide boss, of the flow disturbing ribs. The problems that when the plane where the water seal of the water pump is located is lower than the plane of a water pump shell, the cooling liquid pressure around the water seal is not enough, cooling liquid supply is insufficient, the water seal is subjected to dry grinding, and the service life of the water seal is short are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of internal combustion engines, in particular to an engine water pump. Background Art

[0002] Utility model patent publication number CN218439864U discloses an engine water pump comprising a hollow water pump housing with a shaft coupling bearing sealed within the housing. A flange is mounted on one end of the shaft coupling bearing, and the other end is sequentially connected to the water pump housing, water seal, and impeller. The water pump housing is provided with an overflow hole connected to the water pump housing cavity and a water reservoir connected to the overflow hole. Multiple flow-disrupting ribs are evenly distributed around the periphery of the water seal on the side of the water pump housing near the water seal. Balancing holes are also provided between the impeller blades. This solves the problems of low coolant pressure around the water pump seal and poor lubrication of the water seal.

[0003] However, the above technology still has the following problems in practical application:

[0004] Although there are spoiler ribs to intercept part of the coolant to the water seal, the existing water pump water seal is lower than the plane of the water pump housing, the cavity where the water seal is located is larger, the coolant pressure around the water seal is still insufficient, and the amount of coolant entering is still insufficient. The lubrication performance of the water seal is still poor, and dry grinding of the water seal is prone to occur. Utility Model Content

[0005] The purpose of the utility model is to provide an engine water pump, which solves the problems of insufficient coolant supply due to insufficient coolant pressure around the water seal when the plane of the water pump water seal is lower than the plane of the water pump housing, causing dry grinding of the water seal and shortening the life of the water seal.

[0006] The utility model is implemented through the following technical solutions: an engine water pump, comprising a water pump housing containing a cavity therein, a rotating shaft coaxially extending through the water pump housing, an impeller being provided at one end of the rotating shaft extending out of the inner cavity of the water pump housing, the portion of the rotating shaft located in the cavity being connected to the water pump housing via a shaft coupling bearing and a water seal, and at least four spoiler ribs being provided in an annular array around the cavity on an end surface of the water pump housing close to the impeller;

[0007] One end of the water seal extends between the plurality of spoiler ribs, a first guide groove is provided on the spoiler rib, a second guide groove is provided on the water pump housing, the second guide groove extends out of the impeller, and the first guide groove is connected to the second guide groove.

[0008] Furthermore, there is only one first guide groove and only one second guide groove.

[0009] Furthermore, a flow guide boss is provided on the end surface of the water pump housing, and the first flow guide groove is provided on the spoiler rib close to the flow guide boss.

[0010] Furthermore, a pulley is provided at one end of the rotating shaft away from the impeller.

[0011] Furthermore, a plurality of balancing holes are provided in a ring array on one side of the impeller close to the water seal.

[0012] Furthermore, a sealing groove connected end to end is provided on the side of the water pump housing close to the impeller, and a sealing ring is provided in the sealing groove.

[0013] Furthermore, a plurality of connection holes are provided on the water pump housing located outside the sealing groove, and bolts are provided in the connection holes to connect the water pump housing to the engine.

[0014] Furthermore, a water storage tank is provided on the water pump housing, and the water storage tank is communicated with the cavity between the shaft coupling bearing and the water seal through an overflow hole;

[0015] A sponge is arranged in the water storage tank, and a bowl-shaped plug is embedded in the notch of the water storage tank.

[0016] The technical solution of the utility model has at least the following advantages and beneficial effects:

[0017] 1. The pumped coolant can enter between the impeller and the water seal from the second guide groove and the first guide groove, increasing the supply of coolant around the water seal and cooperating with multiple spoiler ribs to increase the pressure of the coolant around the water seal, so that the water seal is in the coolant at a certain pressure, and thus the water seal is not prone to dry grinding.

[0018] 2. The coolant can enter between the impeller and the water seal through the balancing hole, and at the same time cooperate with the gap between the impeller and the water pump housing and the coolant entering from the second guide groove and the first guide groove to ensure the supply amount and supply pressure of the coolant around the water seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the three-dimensional structure of an engine water pump provided by the utility model;

[0021] Figure 2This is a schematic diagram of the three-dimensional structure of a water pump housing in an engine water pump provided by the utility model;

[0022] Figure 3 This is a structural diagram of an impeller in an engine water pump provided by the utility model;

[0023] Figure 4 A schematic diagram of the explosion structure of an engine water pump provided by the utility model;

[0024] Figure 5 A cross-sectional view of a water pump housing in an engine water pump provided by the utility model;

[0025] Icons: 1. Water pump housing, 11. Cavity, 12. Spoiler rib, 121. First guide groove, 13. Second guide groove, 14. Guide boss, 15. Sealing groove, 16. Sealing ring, 17. Connecting hole, 171. Bolt, 18. Water storage tank, 181. Overflow hole, 182. Sponge, 183. Bowl plug, 2. Rotating shaft, 21. Shaft coupling bearing, 22. Pulley, 3. Impeller, 31. Balance hole, 4. Water seal. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0028] Reference Figures 1 to 5 As shown, this embodiment provides an engine water pump, including a water pump housing 1 containing a cavity 11 therein, a rotating shaft 2 coaxially penetrates the water pump housing 1, an impeller 3 is provided at one end of the rotating shaft 2 extending out of the inner cavity of the water pump housing 1, and a pulley 22 is provided at the end of the rotating shaft 2 away from the impeller 3. When in use, the impeller 3 needs to be placed in a driving cavity on the engine, and the pulley 22 is driven to rotate by the fan belt, thereby pumping out the hot water in the water channel of the engine cylinder and pumping in the cold water at the same time.

[0029] The portion of the rotating shaft 2 located in the cavity 11 is rotatably and hermetically connected to the water pump housing 1 via a coupling bearing 21 and a water seal 4. The coupling bearing 21 primarily ensures coaxial rotation between the rotating shaft 2 and the water pump housing 1. The water seal 4 typically consists of a rotating ring (ceramic ring), a stationary ring (graphite ring), a clamping element (mechanical spring), and a sealing element (corrugated rubber seat). These components work together to form a reliable sealing structure.

[0030] When the water pump is operating, the rotating ring and the stationary ring fit tightly together, forming a friction pair. To prevent damage to components from overheating due to dry friction, a small amount of coolant enters the friction surface of water seal 4, forming a thin lubricating film. Simultaneously, a certain amount of coolant evaporates and leaks, dissipating the heat generated by friction.

[0031] More specifically, Figure 1 and Figure 2 As shown, at least four spoiler ribs 12 are arranged in a circular array around the cavity 11 on the end face of the water pump housing 1 close to the impeller 3; by placing multiple spoiler ribs 12 between the impeller 3 and the water pump housing 1, multiple chambers are formed on the end face of the water pump housing 1, and the multiple chambers are evenly distributed around the water seal 4 to ensure the pressure around the water seal 4.

[0032] One end of the water seal 4 extends to between the spoiler ribs 12, and a first guide groove 121 is provided on the end surface of the spoiler rib 12 close to the impeller 3. A second guide groove 13 is provided on the water pump housing 1, and the second guide groove 13 extends out of the impeller 3. The first guide groove 121 is connected to the second guide groove 13; in specific implementation, when the water pump is working, the coolant pumped through the impeller 3 can enter the chamber between the multiple spoiler ribs 12 through the gap between the impeller 3 and the water pump housing 1, and through the first guide groove 121 and the second guide groove 13, without affecting the structure of the multiple chambers and forming a stable pressure around the water seal 4, the coolant is easier to enter the multiple chambers, which helps to reduce the content of coolant around the water seal 4, and thus makes the water seal 4 less likely to produce dry grinding.

[0033] More specifically, Figure 1 and Figure 2 As shown, there is only one first guide groove 121 and one second guide groove 13. A guide boss 14 is also provided on the end face of the water pump housing 1. The first guide groove 121 is provided on the spoiler rib 12 near the guide boss 14. The guide boss 14 can form a complete guide channel with the cylinder block of the engine, thereby guiding the coolant into the cooling pipeline in the cylinder block. At the same time, the pumped coolant can enter between the impeller 3 and the water seal 4 from the second guide groove 13 and the first guide groove 121, increasing the supply of coolant around the water seal 4 while cooperating with multiple spoiler ribs 12 to increase the pressure of the coolant around the water seal 4, so that the water seal 4 is in the coolant at a certain pressure, and thus the water seal 4 is not prone to dry grinding.

[0034] More specifically, as shown in 1-3, a plurality of balancing holes 31 are provided in a circular array on the side of the impeller 3 close to the water seal 4. In specific implementation, there are 6 balancing holes 31, and the coolant can enter between the impeller 3 and the water seal 4 through the balancing holes 31. At the same time, the coolant cooperates with the gap between the impeller 3 and the water pump housing 1 and the coolant entering the second guide groove 13 and the first guide groove 121 to jointly ensure the supply amount and supply pressure of the coolant around the water seal 4.

[0035] As shown in FIG1 , the water pump housing 1 is provided with a sealing groove 15 connected end to end on the side near the impeller 3. An annular sealing ring 16 is installed in the sealing groove 15. Furthermore, the water pump housing 1 is provided with a plurality of connection holes 17 outside the sealing groove 15. Bolts 171 are installed in the connection holes 17 to connect the water pump housing 1 to the engine. After the water pump housing 1 and the engine are fixed with the bolts 171, a locating pin can be further provided to enhance the stability of the connection with the engine cylinder block. When the water pump housing 1 and the engine cylinder block are tightly connected, the sealing ring 16 seals the gap between the water pump housing 1 and the engine cylinder block.

[0036] like Figure 4 and 5 As shown, the water pump housing 1 is provided with a water tank 18, which communicates with the cavity 11 located between the coupling bearing 21 and the water seal 4 via an overflow hole 181. A sponge 182 is disposed within the water tank 18, and a bowl-shaped plug 183 is embedded in the notch of the water tank 18. In actual use, coolant inevitably leaks from the water pump housing 1 through the water seal 4. This leaked coolant is then directed through the overflow hole 181 and stored in the water tank 18. It evaporates as the engine temperature gradually rises, effectively preventing false positives for water pump leakage.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An engine water pump, comprising a water pump housing (1) containing a cavity (11) therein, a rotating shaft (2) coaxially passing through the water pump housing (1), an impeller (3) being provided at one end of the rotating shaft (2) extending out of the inner cavity of the water pump housing (1), the portion of the rotating shaft (2) located in the cavity (11) being connected to the water pump housing (1) via a shaft coupling bearing (21) and a water seal (4), at least four spoiler ribs (12) being provided in an annular array around the cavity (11) on an end surface of the water pump housing (1) close to the impeller (3), and characterized in that: One end of the water seal (4) extends between the plurality of spoiler ribs (12), a first guide groove (121) is provided on the spoiler rib (12), a second guide groove (13) is provided on the water pump housing (1), the second guide groove (13) extends out of the impeller (3), and the first guide groove (121) is communicated with the second guide groove (13).

2. An engine water pump according to claim 1, characterized in that: There is only one first guide groove (121) and one second guide groove (13).

3. An engine water pump according to claim 2, characterized in that: A flow guide boss (14) is further provided on the end surface of the water pump housing (1), and the first flow guide groove (121) is provided on the spoiler rib (12) near the flow guide boss (14).

4. The engine water pump according to claim 1, characterized in that: A pulley (22) is provided at one end of the rotating shaft (2) away from the impeller (3).

5. The engine water pump according to claim 3, characterized in that: A plurality of balancing holes (31) are provided in an annular array on one side of the impeller (3) close to the water seal (4).

6. The engine water pump according to claim 1, characterized in that: A sealing groove (15) connected end to end is provided on one side of the water pump housing (1) close to the impeller (3), and a sealing ring (16) is provided in the sealing groove (15).

7. The engine water pump according to claim 6, characterized in that: A plurality of connection holes (17) are provided on the water pump housing (1) outside the sealing groove (15), and bolts (171) are provided in the connection holes (17) to connect the water pump housing (1) to the engine.

8. The engine water pump according to claim 1, characterized in that: A water storage tank (18) is provided on the water pump housing (1), and the water storage tank (18) is communicated with the cavity (11) located between the shaft coupling bearing (21) and the water seal (4) through an overflow hole (181); A sponge (182) is provided in the water storage tank (18), and a bowl-shaped plug (183) is embedded in the notch of the water storage tank (18).

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