Double-oil-leakage-prevention high-integration water pump for internal combustion engine
The dual-seal design for internal combustion engine pumps addresses oil leakage issues by integrating a bone arch oil seal and optimized oil channels, improving reliability and reducing maintenance costs through enhanced lubrication and sealing.
Patent Information
- Application Number
- CN202422542856.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-10-21
AI Technical Summary
The existing internal combustion engine water pumps have oil leakage problems in the bearing structure design, especially the split and integral structures have shortcomings in sealing and lubricity, resulting in problems such as dry grinding of oil seals, wear of metal particles and high-temperature oil leakage.
The double oil leakage protection design is adopted, including the installation of bearings and impellers in the water pump housing, and the design of oil discharge holes and oil inlet holes through the bearing chamber. Combined with the skeleton oil seal and O-ring seal, it is fixed through interference fit to form a multi-layer oil leakage protection barrier, optimized lubrication and heat dissipation conditions.
It improves the installation and disassembly efficiency of the water pump, reduces the probability of oil leakage, enhances operating reliability, reduces maintenance and replacement costs, and improves the energy efficiency and stability of the internal combustion engine system.
Smart Images
Figure CN223104853U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of preventing oil leakage of internal combustion engine water pumps, in particular to a highly integrated water pump with double oil leakage prevention for internal combustion engines. Background Technique
[0002] The bearing structures of conventional internal combustion engine water pumps are mainly divided into two types. One is a split type, that is, two bearings are distributed on both sides of the shaft. In terms of preventing oil leakage, it mainly relies on the sealing covers of the bearings. Occasionally, a structure with a separate skeleton oil seal arranged behind the lower bearing can be seen, and it can be further subdivided into a structure with a bearing with a sealing cover and a skeleton oil seal and a structure with a bearing without a sealing cover and a skeleton oil seal; the other is an integral type, that is, the bearing outer ring, cage, steel balls, and shaft are together. Preventing oil leakage mainly relies on the self - contained sealing ring of the bearing, but there are pressure relief holes on the sealing ring.
[0003] However, for the split - type bearing with a sealing cover + skeleton oil seal structure, since a sealed cavity is formed between the lower bearing and the oil seal, the oil seal cannot be lubricated by circulating grease, and the situation of dry running of the oil seal is likely to occur, which cannot achieve the effect of preventing oil; moreover, for the split - type bearing without a sealing cover and a skeleton oil seal structure, since the bearing cavity is open, when metal particles enter the gearbox, the bearing raceway is easily damaged, and the lip of the oil seal is easily worn by the particles, resulting in oil leakage. For the integral structure, due to the pressure in the inner cavity of the shaft - connected bearing at high temperatures, when the pressure relief hole of the sealing ring discharges pressure, grease and engine oil will also be carried out, resulting in oil leakage. Content of the Utility Model
[0004] The purpose of the utility model is to provide a highly integrated water pump with double oil leakage prevention for internal combustion engines aiming at the defects existing in the prior art, achieving the effects of improving the installation and disassembly efficiency of the water pump, solving the risk of dry running of the oil seal, reducing the probability of oil leakage, improving the operation reliability of the water pump, and at the same time reducing the cost.
[0005] In order to achieve the above - mentioned purpose, the technical solution adopted by the utility model is: a highly integrated water pump with double oil leakage prevention for internal combustion engines, including a water pump housing, a bearing, an impeller, and a gear; the bearing is arranged in the water pump housing and is fixedly fitted with the water pump housing; the impeller is arranged in the water pump housing and is fixedly fitted with the bearing; an oil discharge hole penetrating through the bearing chamber is provided.
[0006] Furthermore, a skeleton oil seal is provided, the skeleton oil seal is arranged inside the bearing, and the skeleton oil seal can exist independently without the oil discharge hole.
[0007] Furthermore, an oil inlet hole penetrating through the bearing chamber is provided, and the oil inlet hole penetrates through the bearing chamber and leads directly to the position of the skeleton oil seal.
[0008] Furthermore, the oil unloading hole passes through the bearing chamber and directly reaches the skeleton oil seal position.
[0009] Furthermore, a plurality of oil inlet holes are provided.
[0010] Furthermore, the oil unloading holes are provided in plurality.
[0011] Furthermore, an O-ring seal is provided, and the O-ring seal seals the water pump housing and its outer pump cover.
[0012] Furthermore, a mechanical seal is provided, and the cooperation between the static ring of the mechanical seal and the water pump housing is an interference fit, and the cooperation between the dynamic ring of the mechanical seal and the bearing is an interference fit.
[0013] Furthermore, the bearing is arranged in the water pump housing and is fixed with the water pump housing by interference fit, and the impeller is arranged in the water pump housing and is fixed with the bearing by using one of interference fit, keyway and thread.
[0014] Furthermore, the fit between the outer circle of the skeleton oil seal and the water pump housing is an interference fit, and the fit between the inner lip of the skeleton oil seal and the bearing is an interference fit.
[0015] The invention comprises a water pump housing, a bearing, an impeller and a gear; the bearing is arranged in the water pump housing and is fixed with the water pump housing; the impeller is arranged in the water pump housing and is fixed with the bearing; and a structure is provided with an oil unloading hole penetrating the bearing chamber, so as to improve the assembly and disassembly efficiency of the water pump, solve the risk of dry grinding of the oil seal, reduce the probability of oil leakage, improve the reliability of the water pump operation, and reduce the cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 A schematic diagram of a highly integrated water pump with double oil leakage prevention for an internal combustion engine;
[0018] Figure 2 A cross-sectional view of a highly integrated water pump with double oil leakage prevention for an internal combustion engine;
[0019] Figure 3 A side view of a highly integrated water pump with double oil leakage prevention for an internal combustion engine;
[0020] Figure 4 Rear view of a highly integrated water pump with double oil leakage prevention for an internal combustion engine;
[0021] Figure 5 Cross-sectional view of a highly integrated water pump with double oil leakage prevention for an internal combustion engine in a non-sealed form;
[0022] Reference numerals:
[0023] Water pump housing 1, bearing 2, impeller 3, gear 4, oil drain hole 5, skeleton oil seal 6, oil inlet hole 7, O-ring seal 8, pump cover 9, mechanical seal 10. Detailed implementation manner
[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.
[0025] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.
[0026] A highly integrated water pump with double oil leakage prevention for an internal combustion engine, as Figure 1 、 2 shown, includes a water pump housing 1, a bearing 2, an impeller 3 and a gear 4; the bearing 2 is arranged in the water pump housing 1 and is fixedly fitted with the water pump housing 1; the impeller 3 is arranged in the water pump housing 1 and is fixedly fitted with the bearing 2; an oil drain hole 5 penetrating the bearing chamber is also provided.
[0027] Specifically, by adding an oil discharge hole 5 that runs through the bearing chamber, the grease and oil that may be brought out when the pressure relief hole of the sealing ring is discharged can be effectively discharged to prevent them from accumulating outside the bearing chamber, thereby preventing oil leakage. The existence of the oil discharge hole 5 constitutes an anti-leakage barrier, which significantly improves the anti-leakage performance of the water pump. By optimizing the matching mode of the bearing and the water pump housing and adding the oil discharge hole 5, the overall structure of the water pump is made more compact and reasonable, reducing the downtime caused by faults such as oil leakage and bearing damage, and improving the reliability and durability of the water pump. Due to the improvement of the anti-leakage performance, the maintenance frequency and cost of the water pump can be reduced accordingly. The cost of grease replenishment and replacement caused by oil leakage, as well as the maintenance and replacement cost caused by bearing damage are reduced, and the integral bearing structure has good lubrication and anti-leakage design, which helps to reduce friction loss and energy loss during the operation of the water pump, thereby improving the energy efficiency of the entire internal combustion engine system.
[0028] As a preferred embodiment of the above, Figure 2 As shown, a skeleton oil seal 6 is provided. The skeleton oil seal 6 is provided inside the bearing 2 . The skeleton oil seal 6 can exist alone without providing the oil discharge hole 5 .
[0029] Specifically, by designing a precise matching and fixing method between the bearing and the water pump housing, combining the sealing ring of the bearing and the additional skeleton oil seal 6, the first anti-oil leakage barrier is formed, and then the oil discharge hole 5 is combined to form a multi-layer anti-oil leakage barrier, thereby greatly enhancing the anti-oil leakage performance of the water pump. The addition of the skeleton oil seal 6 makes the overall structure of the water pump more perfect and reduces the risk of failure caused by oil leakage. This helps to improve the stability and reliability of the water pump during operation and ensure the normal operation of the internal combustion engine system.
[0030] As a preferred embodiment of the above, Figure 2 As shown, an oil inlet hole 7 penetrating the bearing chamber is also provided, and the oil inlet hole 7 penetrates the bearing chamber and directly reaches the skeleton oil seal 6.
[0031] Specifically, the design of the oil inlet hole 7 enables the lubricating oil mist to directly enter the lip seal 6 through the bearing chamber, providing necessary lubrication for the seal, which helps reduce the dry friction between the seal and the shaft, lower the friction resistance, and thus extend the service life of the seal. At the same time, the oil mist forms a dense oil film on the shaft surface, which can also improve the sealing performance of the seal and further enhance the anti-oil leakage ability of the water pump. The circulating oil and gas can also carry away the heat generated by the friction between the seal and the shaft. By optimizing the lubrication and heat dissipation conditions, the design of the oil inlet hole 7 helps reduce the risk of bearing and seal failures, improve the overall reliability and durability of the water pump, contribute to ensuring the stable operation of the internal combustion engine system, and reduce the downtime and maintenance costs caused by water pump failures. The oil inlet hole 7 also makes the replenishment and replacement of lubricating grease more convenient. The operator does not need to externally connect and force-feed the water pump bearing chamber or add grease nipples, nor does it need to disassemble other components of the water pump, which simplifies the maintenance and servicing of the water pump and reduces the maintenance costs and time.
[0032] As a preference of the above embodiment, as Figure 2 shown, the oil drain hole 5 penetrates through the bearing chamber and directly leads to the lip seal 6.
[0033] Specifically, with the structure that the oil drain hole 5 penetrates through the bearing chamber and directly leads to the lip seal 6, the oil drain hole 5 not only serves as a channel for discharging excess grease and oil, but also realizes additional lubrication for the seal through direct connection with the lip seal 6, and the oil drain hole 5 undertakes dual functions simultaneously.
[0034] As a preference of the above embodiment, as Figure 1 shown, a plurality of oil inlet holes 7 are provided.
[0035] As a preference of the above embodiment, as Figure 1 shown, a plurality of oil drain holes 5 are provided.
[0036] Specifically, multiple oil inlet holes 7 can ensure that the lubricating grease is more evenly distributed on the bearing and the lip seal 6, reduce the wear and failure risks caused by uneven lubrication, increase the inflow channels of the lubricating grease, enable the grease to enter the bearing chamber and the seal part faster, and improve the lubrication efficiency. Multiple oil drain holes 5 can discharge the excess grease and oil in the bearing chamber faster, reduce the risks of grease accumulation and leakage. Similar to the oil inlet holes, multiple oil drain holes 5 also help ensure that the seal part is fully lubricated, while discharging the excess grease and keeping the seal clean and in good working condition.
[0037] As a preference of the above embodiment, as Figure 2 shown, an O-ring seal 8 is provided, and the O-ring seal 8 seals the water pump housing 1 and its outer pump cover 9.
[0038] Specifically, the O-ring seal 8 is used to seal the water pump housing 1 and the outer pump cover 9 outside it, so as to prevent liquid from leaking through the gap between the water pump housing 1 and the pump cover 9. Thus, the normal operation of the pump can be effectively ensured, the efficiency of the pump can be improved, and equipment damage or safety accidents caused by leakage can be prevented.
[0039] As a preference of the above embodiment, as Figure 1 shown, a mechanical seal 10 is further provided. The fit between the stationary ring of the mechanical seal 10 and the water pump housing is an interference fit, and the fit between the rotating ring of the mechanical seal 10 and the bearing is an interference fit.
[0040] Specifically, the interference fit can provide a tight sealing effect to prevent fluid from leaking through the gap between the stationary ring and the water pump housing. At the same time, this fit method can also enhance the stability of the stationary ring, making it not easy to loosen or fall off during operation.
[0041] As a preference of the above embodiment, as Figure 2 shown, the bearing 2 is arranged inside the water pump housing 1 and is fixed to the water pump housing 1 by an interference fit. The impeller 3 is arranged inside the water pump housing 1 and is fixed to the bearing 2 by one of the forms of interference fit, keyway, or thread.
[0042] Specifically, the interference fit can provide good radial and axial support to ensure the stability and reliability of the bearing during the operation of the water pump. It can reduce the relative movement between the bearing and the housing, thereby reducing wear and noise. The tight connection helps to prevent the bearing from loosening or falling off due to vibration or impact. Different impeller fit methods can meet different water pump design requirements and usage conditions, ensuring the efficient and stable operation of the water pump, facilitating disassembly and maintenance, and being applicable to water pumps that require frequent replacement of impellers or bearings.
[0043] As a preference of the above embodiment, as Figure 2 shown, the fit between the outer circle of the skeleton oil seal 6 and the water pump housing 1 is an interference fit, and the fit between the inner lip of the skeleton oil seal 6 and the bearing 2 is an interference fit.
[0044] Specifically, the interference fit can ensure an effective seal is formed between the inner lip of the skeleton oil seal 6 and the bearing 2, preventing lubricating grease from leaking through the gap between the bearing 2 and the skeleton oil seal 6, reducing the relative movement between the skeleton oil seal 6 and the bearing 2, thereby reducing wear and extending the service life.
[0045] Specifically, each structural member in this solution can also be arranged in a mirror-symmetrical manner.
[0046] Specifically, as Figure 5As shown, in the oil seal-free form, the oil discharge hole 5 changes its position and also penetrates through the bearing chamber and the water pump housing 1.
[0047] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.
Claims
1. A highly integrated water pump with double anti-oil leakage for internal combustion engines, characterized in that: It includes a water pump housing (1), a bearing (2), an impeller (3) and a gear (4); The bearing (2) is arranged in the water pump housing (1) and is fixedly fitted with the water pump housing (1); The impeller (3) is arranged in the water pump housing (1) and is fixedly fitted with the bearing (2); An oil drain hole (5) penetrating the bearing chamber is provided.
2. The highly integrated water pump with double anti-oil leakage for internal combustion engines according to claim 1, characterized in that, A skeleton oil seal (6) is provided. The skeleton oil seal (6) is arranged in the water pump housing (1), and the skeleton oil seal (6) can exist independently without the oil drain hole (5).
3. The highly integrated water pump with double oil leakage prevention for internal combustion engines according to claim 2, characterized in that, An oil inlet hole (7) penetrating the bearing chamber is provided. The oil inlet hole (7) penetrates the bearing chamber and leads directly to the position of the skeleton oil seal (6).
4. The highly integrated water pump for internal combustion engines with double oil leakage prevention according to claim 3, characterized in that, The oil drain hole (5) penetrates the bearing chamber and leads directly to the position of the skeleton oil seal (6).
5. The highly integrated water pump with double anti-oil leakage for internal combustion engines according to claim 4, characterized in that, A plurality of the oil inlet holes (7) are provided.
6. The highly integrated water pump with double oil leakage prevention for internal combustion engines according to claim 1, characterized in that, A plurality of the oil drain holes (5) are provided.
7. The highly integrated water pump for internal combustion engines with double oil leakage prevention according to claim 1, characterized in that, An O-ring seal (8) is provided. The O-ring seal (8) seals the water pump housing (1) and its outer pump cover (9).
8. The highly integrated water pump for internal combustion engines with double oil leakage prevention according to claim 1, characterized in that, A mechanical seal (10) is provided. The static ring of the mechanical seal (10) is in an interference fit with the water pump housing (1), and the dynamic ring of the mechanical seal (10) is in an interference fit with the bearing (2).
9. The highly integrated water pump with double anti-oil leakage for internal combustion engines according to claim 1, characterized in that, The bearing (2) is arranged in the water pump housing (1) and is fixedly fitted with the water pump housing (1) by interference fit. The impeller (3) is arranged in the water pump housing (1) and is fixedly fitted with the bearing (2) by one of the forms of interference fit, keyway or thread.
10. The highly integrated water pump with double anti-oil leakage for internal combustion engines according to claim 2, characterized in that, The outer circle of the skeleton oil seal (6) is in an interference fit with the water pump housing (1), and the inner lip of the skeleton oil seal (6) is in an interference fit with the bearing (2).