Internal combustion engine water pump
By employing an interference fit and limiting design between the bearing and the housing in the internal combustion engine water pump, the problem of bearing movement was solved, achieving bearing stability and effective coolant circulation, thereby improving the operational reliability and lifespan of the internal combustion engine.
Patent Information
- Application Number
- CN202520888729.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-05-07
AI Technical Summary
Internal combustion engine water pump bearings are prone to movement under radial and axial loads, as well as changes in coolant pressure and temperature, leading to wear and coolant leakage, which affects system efficiency and internal combustion engine performance.
The bearing is designed with an interference fit between itself and the housing, and a limiting part is provided on the housing to prevent the bearing from moving axially and radially. Combined with a water seal design and a guide groove structure, coolant leakage is prevented.
It effectively slows down bearing movement, reduces wear and noise, improves system stability, prevents coolant leakage, and protects the performance and lifespan of the internal combustion engine.
Smart Images
Figure CN223952898U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of water pumps, in particular to an internal combustion engine water pump. BACKGROUND
[0002] As an important component of the internal combustion engine cooling system, the stable operation of the internal combustion engine water pump is crucial to ensure the normal working temperature of the internal combustion engine. During the operation of the internal combustion engine, the water pump circulates and delivers the coolant through the rotation of the impeller to achieve the cooling of the engine.
[0003] The bearing of the water pump is a key component that supports the rotation of the impeller, and its working state directly affects the performance and reliability of the water pump. However, in actual operation, due to the influence of the radial and axial loads from the impeller, as well as the pressure and temperature changes of the coolant, the bearing may experience runout. This runout not only causes the wear of the bearing to intensify, but also may cause the failure of the water pump seal, thereby leading to the leakage of the coolant. The leakage of the coolant not only reduces the efficiency of the cooling system, but also may cause damage to other components of the internal combustion engine, affecting the overall performance and life of the internal combustion engine. CONTENT OF THE UTILITY MODEL
[0004] The purpose of the present application includes, for example, providing an internal combustion engine water pump that can slow down the runout of the bearing.
[0005] Embodiments of the present application can be implemented as follows:
[0006] An embodiment of the present application provides an internal combustion engine water pump, which comprises a housing and a bearing, the housing is provided with a through hole, the bearing is arranged in the through hole, and the bearing is in interference fit with the through hole; the housing is provided with a limiting portion abutting against the bearing, and the limiting portion is used for preventing the bearing from moving along the axial direction of the bearing.
[0007] Optionally, the bearing is provided with opposite first and second limiting surfaces along the axial direction thereof, the limiting portion comprises first and second limiting portions, the first and second limiting portions are arranged in the axial direction of the bearing, and the first and second limiting portions abut against the first and second limiting surfaces, respectively.
[0008] Optionally, the first and second limiting portions are annular, the first limiting portion is arranged on the inner wall of the through hole, and the second limiting portion is arranged at one end of the through hole.
[0009] Optionally, the bearing is a shaft connecting bearing, the bearing is provided with a water seal, the housing is provided with a main flow guide groove and a sub-flow guide groove in communication with the main flow guide groove, and one end of the sub-flow guide groove away from the main flow guide groove faces the water seal.
[0010] Optionally, the water seal part is located in the through hole, the shell is provided with an overflow hole and a water outlet hole, the overflow hole is communicated between the through hole and the water outlet hole, and the overflow hole is close to the water seal part.
[0011] Optionally, the water outlet hole is provided with a water outlet end, and the water outlet end is provided with a cover.
[0012] Optionally, the water seal part is in interference fit with the bearing and the through hole.
[0013] Optionally, the water seal part is provided with a limiting ring, the shell is provided with an assembly surface, and the limiting ring is in abutment with the assembly surface.
[0014] Optionally, the bearing is provided with an impeller, the impeller is provided with blades, a first water baffle and a second water baffle, the blades are located between the first water baffle and the second water baffle, and the first water baffle is closer to the shell than the second water baffle.
[0015] Optionally, the shell is provided with a sealing groove along the circumferential direction of the shell, and the sealing groove is provided with a sealing strip.
[0016] The internal combustion engine water pump provided by the embodiment has the following beneficial effects, for example: in order to slow down the movement of the bearing, an internal combustion engine water pump is designed, which comprises a shell and a bearing. The shell is provided with a through hole, the bearing is arranged in the through hole, and the bearing is in interference fit with the through hole. The shell is provided with a limiting part in abutment with the bearing, and the limiting part is used to prevent the bearing from moving along the axial direction of the bearing.
[0017] By means of interference fit between the bearing and the through hole of the shell and abutment between the limiting part of the shell and the bearing, the movement of the bearing along the axial direction and the radial direction of the bearing can be prevented, and the movement of the bearing is slowed down. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.
[0019] Figure 1 It is an assembly diagram of the internal combustion engine water pump in the embodiment of the present application.
[0020] Figure 2 It is an exploded view of the internal combustion engine water pump in the embodiment of the present application.
[0021] Figure 3It is a sectional view of the water pump of the internal combustion engine in the embodiment of the present application.
[0022] Figure 4 It is a schematic view of the housing in the embodiment of the present application.
[0023] Figure 5 It is a schematic view of the impeller in the embodiment of the present application.
[0024] Icon: 1-housing; 11-through hole; 12-first limiting part; 13-second limiting part; 14-main guide groove; 15-sub guide groove; 16-overflow hole; 17-water outlet hole; 18-plug; 19-assembly surface; 2-bearing; 21-first limiting surface; 22-second limiting surface; 3-water seal; 31-limiting block ring; 4-impeller; 41-vane; 42-first water baffle; 43-second water baffle; 5-pulley; 6-sealing strip. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.
[0026] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts fall within the scope of protection of the present application.
[0027] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0028] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the utility model product in use, only for the convenience of describing the present application and simplifying the description, and it does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.
[0029] In addition, if the terms "first", "second" and the like appear, they are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.
[0030] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.
[0031] As disclosed in the background section, in the actual operation of the internal combustion engine, due to the radial and axial loads from the impeller and the influence of the pressure and temperature changes of the coolant on the water pump bearing, the bearing may be prone to runout. This runout not only causes the bearing to wear out more quickly, but also can cause the water pump seal to fail, which in turn leads to coolant leakage. Coolant leakage not only reduces the efficiency of the cooling system, but also can cause damage to other components of the internal combustion engine, affecting the overall performance and service life of the internal combustion engine. The embodiments of the present application provide an internal combustion engine water pump, at least to solve the above technical problems.
[0032] For reference Figures 1-5 The internal combustion engine water pump provided by the embodiments of the present application includes a housing 1 and a bearing 2, the housing 1 is provided with a through hole 11, the bearing 2 is arranged in the through hole 11, and the bearing 2 is in interference fit with the through hole 11; the housing 1 is provided with a limiting portion abutting against the bearing 2, and the limiting portion is used to prevent the bearing 2 from moving along the axial direction of the bearing 2.
[0033] It should be noted that the interference fit is a way to achieve close connection by generating a certain amount of interference between two components. In this embodiment, the interference fit between the bearing 2 and the through hole 11 can effectively prevent the bearing 2 from moving along its axial and radial directions. This mechanical connection not only improves the assembly accuracy, but also enhances the overall rigidity of the structure, thereby reducing the risk of loosening caused by vibration or external impact.
[0034] In addition, the limiting portion provided on the housing 1 further improves the stability of the system. The limiting portion abuts against the bearing 2, forming a mechanical constraint to prevent the bearing 2 from moving in the axial direction. The reduction of axial runout not only helps to reduce the wear of the bearing 2, but also reduces the noise and energy loss caused by irregular movement.
[0035] By interference fitting the bearing 2 with the through hole 11 of the housing 1, and abutting the limiting portion of the housing 1 with the bearing 2, the bearing 2 can be prevented from moving along its axial and radial directions, thereby reducing the runout of the bearing 2 in both axial and radial directions.
[0036] In this embodiment, the bearing 2 is provided with opposite first and second limiting surfaces 21 and 22 along its axial direction, and the limiting portion includes first and second limiting portions 12 and 13, which are arranged in the axial direction of the bearing 2. The first and second limiting portions 12 and 13 abut against the first and second limiting surfaces 21 and 22, respectively.
[0037] The first limiting portion 12 and the second limiting portion 13 are arranged at intervals along the axial direction of the bearing 2, and the first limiting portion 12 and the second limiting portion 13 abut against the first limiting surface 21 and the second limiting surface 22 respectively, thereby preventing the bearing 2 from moving along the axial direction of the bearing 2.
[0038] The first limiting portion 12 and the second limiting portion 13 are both annular, the first limiting portion 12 is arranged on the inner wall of the through hole 11, and the second limiting portion 13 is arranged on one end of the through hole 11.
[0039] The first limiting portion 12 is protruded inward from the inner wall of the through hole 11, and the inner diameter of the first limiting portion 12 is smaller than the inner diameter of the through hole 11; the second limiting portion 13 is arranged on the shell 1 and located at one end of the through hole 11, and the second limiting portion 13 is bent and extended towards the inside of the through hole 11 by roll riveting.
[0040] During the installation of the bearing 2, the bearing 2 is first inserted from one end of the through hole 11 until the first limiting surface 21 of the bearing 2 abuts against the first limiting portion 12, and then the part of the shell 1 located at one end of the through hole 11 is reversely wrapped by roll riveting to form the second limiting portion 13, and the second limiting portion 13 abuts against the second limiting surface 22 of the bearing 2, thereby limiting the axial movement of the bearing 2.
[0041] In the embodiment, the bearing 2 is a shaft coupling bearing, the bearing 2 is provided with a water seal 3 and an impeller 4, the shell 1 is provided with a main flow guide groove 14 and a sub-flow guide groove 15 connected with the main flow guide groove 14, and one end of the sub-flow guide groove 15 away from the main flow guide groove 14 faces the water seal 3.
[0042] It should be noted that the shaft coupling bearing is a mechanical component integrating the shaft and the bearing 2, the first limiting surface 21 and the second limiting surface 22 of the bearing 2 are located in the through hole 11, both ends of the bearing 2 extend out of the through hole 11, the impeller 4 is arranged at one end of the bearing 2, the water seal 3 is located between the impeller 4 and the first limiting surface 21 of the bearing 2, and the other end of the bearing 2 is further provided with a belt pulley 5, the engine can drive the belt pulley 5 to rotate through a belt, the belt pulley 5 drives the impeller 4 to rotate through the bearing 2, the coolant flows into the impeller 4 from the middle of the impeller 4, and is thrown out to the main flow guide groove 14 through the rotation of the impeller 4.
[0043] The sub-flow guide groove 15 is arc-shaped, one end of the sub-flow guide groove 15 communicates with the main flow guide groove 14, and the other end of the sub-flow guide groove 15 faces the water seal 3. When the coolant flows into the main flow guide groove 14, part of the coolant flows into the sub-flow guide groove 15 from the main flow guide groove 14, and then flows to the water seal 3 from the sub-flow guide groove 15, so that the water seal 3 is always immersed in the coolant, and dry friction does not occur when the water pump starts, so that the temperature of the water seal 3 is not too high, thereby avoiding the failure of the water seal 3.
[0044] In the embodiment, the water seal 3 is partially located in the through hole 11, the shell 1 is provided with an overflow hole 16 and a water outlet hole 17, the overflow hole 16 is communicated between the through hole 11 and the water outlet hole 17, and the overflow hole 16 is close to the water seal 3.
[0045] The water seal 3 allows a certain leakage during operation, and the leaked cooling liquid can flow into the water outlet hole 17 through the overflow hole 16, and then be discharged out of the shell 1 through the water outlet hole 17, thereby avoiding the accumulation of the cooling liquid in the through hole 11 and causing the bearing 2 to rust and fail.
[0046] Optionally, the shell 1 is provided with two overflow holes 16 and two water outlet holes 17, the two overflow holes 16 are respectively communicated with the two water outlet holes 17, and the two overflow holes 16 are all communicated with the through hole 11, and the leaked cooling liquid can flow into the corresponding water outlet hole 17 through any one of the overflow holes 16, and then be discharged out of the shell 1 through the water outlet hole 17.
[0047] It can be understood that the number of the overflow holes 16 and the water outlet holes 17 can be determined according to actual needs, and no limitation is made herein.
[0048] In the embodiment, the water outlet hole 17 has a water outlet end, and the water outlet end is provided with a cover 18.
[0049] The water outlet hole 17 is a blind hole, and only has one water outlet end, the water outlet end is provided with the cover 18, and the cover 18 shields part of the water outlet end, so that the water outlet hole 17 can normally drain water and play a dustproof role.
[0050] In the embodiment, the water seal 3 is in interference fit with the bearing 2 and the through hole 11.
[0051] The water seal 3 is sleeved on the bearing 2 and in interference fit with the bearing 2, the water seal 3 is partially embedded in the through hole 11 and in interference fit with the through hole 11, so that the water seal 3 can be relatively fixed with the bearing 2, and the stability of the water seal 3 is improved.
[0052] The water seal 3 is provided with a limiting stop ring 31, the shell 1 is provided with an assembly surface 19, and the limiting stop ring 31 abuts against the assembly surface 19.
[0053] The assembly surface 19 is located at one end of the through hole 11 away from the second limiting portion 13, in the process of installing the water seal 3, the water seal 3 is sleeved on the bearing 2 and the water seal 3 is pushed towards the inside of the through hole 11 until the limiting stop ring 31 on the water seal 3 abuts against the assembly surface 19 on the shell 1, so as to ensure that the water seal 3 is installed in place.
[0054] In the embodiment, the impeller 4 is provided with blades 41, a first water baffle 42 and a second water baffle 43, the blades 41 are located between the first water baffle 42 and the second water baffle 43, and the first water baffle 42 is closer to the shell 1 than the second water baffle 43.
[0055] The first water baffle 42 separates the blade 41 from the shell 1, which can reduce the cavitation erosion on the shell 1 during the operation of the water pump; the second water baffle 43 can help to control the distance between the external opponent and the impeller 4, i.e., the distance between the external opponent and the second water baffle 43, within a reasonable range, for example, the distance between the external opponent and the second water baffle 43 is controlled within 0.6mm-0.8mm, and the external opponent can be another shell.
[0056] In the embodiment, the shell 1 is provided with a sealing groove along the circumferential direction of the shell 1, and the sealing strip 6 is arranged in the sealing groove.
[0057] The sealing groove is arranged on the side surface of the shell 1 facing the impeller 4, and the extension direction of the sealing groove can be determined according to the contour of the shell 1, and the sealing strip 6 is embedded in the sealing groove to achieve sealing with the external opponent.
[0058] By arranging the sealing strip 6 in the sealing groove, when the shell 1 is assembled with the external opponent, the sealing strip 6 can reduce the planar size requirement of the shell 1 and the opponent, thereby reducing the production cost.
[0059] The technical effects of the internal combustion engine water pump provided by the embodiment of the application at least include: the bearing 2 is interference-fitted with the through hole 11 of the shell 1, and the first limiting portion 12 and the second limiting portion 13 are respectively in abutment with the first limiting surface 21 and the second limiting surface 22, so that the bearing 2 is prevented from moving in the axial direction and the radial direction, and the movement of the bearing 2 is slowed down in the axial direction and the radial direction; part of the cooling liquid is guided to the water seal 3 by the sub-flow guide groove 15, so that the water seal 3 is always soaked in the cooling liquid, dry friction does not occur when the water pump starts, the temperature of the water seal 3 is not too high, and the water seal 3 is prevented from being disabled; the cooling liquid leaked at the water seal 3 can flow into the water outlet hole 17 through the overflow hole 16, and then be discharged out of the shell 1 through the water outlet hole 17, so that the cooling liquid is prevented from accumulating in the through hole 11 and causing the bearing 2 to rust and be disabled; the first water baffle 42 and the second water baffle 43 are arranged on the impeller 4, which can reduce the cavitation erosion on the shell 1 and help to control the distance between the external opponent and the impeller 4 within a reasonable range.
[0060] In summary, the embodiment of the application provides an internal combustion engine water pump, which includes a shell 1 and a bearing 2. The bearing 2 is interference-fitted with the through hole 11 of the shell 1, and the limiting portion of the shell 1 is in abutment with the bearing 2, so that the bearing 2 is prevented from moving in the axial direction and the radial direction, and the movement of the bearing 2 is slowed down in the axial direction and the radial direction.
[0061] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. An internal combustion engine water pump characterized by comprising: The application relates to a bearing assembly, which comprises a shell (1) and a bearing (2), the shell (1) is provided with a through hole (11), the bearing (2) is arranged in the through hole (11), and the bearing (2) is in interference fit with the through hole (11); a limiting part is arranged on the shell (1) and abuts against the bearing (2), and the limiting part is used for preventing the bearing (2) from moving along the axial direction of the bearing (2).
2. The water pump of claim 1, wherein The bearing (2) is provided with opposite first and second limiting faces (21) and (22) along the axial direction of the bearing (2), the limiting part comprises a first limiting part (12) and a second limiting part (13), the first and second limiting parts (12) and (13) are arranged in the axial direction of the bearing (2) and are in abutment with the first and second limiting faces (21) and (22) respectively.
3. The water pump of claim 2, wherein The first and second limiting parts (12) and (13) are annular, the first limiting part (12) is arranged on the inner wall of the through hole (11), and the second limiting part (13) is arranged on one end of the through hole (11).
4. The water pump of claim 1, wherein The bearing (2) is a shaft coupling bearing, a water seal (3) is arranged on the bearing (2), a main flow guide groove (14) and a sub flow guide groove (15) are arranged on the shell (1), and one end of the sub flow guide groove (15) far away from the main flow guide groove (14) faces the water seal (3).
5. The water pump of claim 4, wherein The water seal (3) is partially arranged in the through hole (11), an overflow hole (16) and a water outlet hole (17) are arranged on the shell (1), the overflow hole (16) is arranged between the through hole (11) and the water outlet hole (17), and the overflow hole (16) is close to the water seal (3).
6. The water pump of claim 5, wherein The water outlet hole (17) has a water outlet end, and the water outlet end is provided with a cover (18).
7. The water pump of claim 5, wherein The water seal (3) is in interference fit with the bearing (2) and the through hole (11).
8. The water pump of claim 4, wherein A limiting block ring (31) is arranged on the water seal (3), and an assembly surface (19) is arranged on the shell (1), the limiting block ring (31) abuts against the assembly surface (19).
9. The water pump for an internal combustion engine according to claim 1, characterized by A vane (4) is arranged on the bearing (2), the vane (4) is provided with a blade (41), a first water baffle (42) and a second water baffle (43), the blade (41) is located between the first and second water baffles (42) and (43), and the first water baffle (42) is closer to the shell (1) than the second water baffle (43).
10. The water pump for an internal combustion engine according to claim 1, characterized by A sealing groove is arranged on the shell (1) along the circumferential direction of the shell (1), and a sealing strip (6) is arranged in the sealing groove.