External high-pressure ethanol fuel pump
By using fully covered armature, sealing rings and carbon brushes made of ethanol resistant materials, the corrosion problem of ethanol fuel on traditional fuel pumps is solved, and the durability and performance of the fuel pump are improved.
Patent Information
- Application Number
- CN202422646843.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-31
AI Technical Summary
When traditional fuel pumps use ethanol fuel, rubber seals and commutators are easily corroded, resulting in a shortening of the pump life.
The ethanol-resistant fuel pump is designed with fully covered armature, ethanol-resistant sealing ring and carbon brush, combined with silicone rubber or nitrile rubber sealing ring.
The durability and performance of the fuel pump in an ethanol fuel environment meet environmental protection needs.
Smart Images
Figure CN223164619U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an improved invention of an automotive fuel pump, and particularly to an improved invention of an external high-pressure ethanol fuel pump. Background Art
[0002] Traditional external fuel pumps have some significant limitations in design and application, especially when using ethanol fuel (E85). With the increasing awareness of environmental protection and the growing demand for renewable energy, ethanol fuel (E85) has gradually gained attention as an alternative fuel. However, ethanol has strong corrosiveness, which can erode the rubber seals and commutators in traditional fuel pumps, resulting in a shortened pump body life. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an external high-pressure ethanol fuel pump.
[0004] To solve the above technical problem, the utility model is implemented by adopting the following technical solution: The external high-pressure ethanol fuel pump includes a housing. An impeller assembly, a stator, a rotor and its connecting shaft are arranged inside the housing. A fully enclosed armature is arranged on the rotor. It is characterized in that: the housing is cylindrical, and an oil inlet nozzle is integrally formed at the left end of the housing. A pump head assembly is encapsulated at the right end of the housing. A first O-ring seal is arranged between the pump head assembly and the housing. The first O-ring seal is made of ethanol-resistant material. Positive and negative connectors, an oil outlet nozzle and a check valve are arranged on the pump head assembly. A filter screen is arranged between the oil inlet nozzle and the impeller assembly. A second O-ring seal is arranged between the impeller assembly and the housing. The second O-ring seal is made of ethanol-resistant material. A commutator, a wear-reducing plate and a snap ring are sequentially arranged on the connecting shaft corresponding to the right end of the rotor. The brush of the commutator is a carbon brush.
[0005] Each of the positive and negative connectors includes a conductive column. The conductive column is sealed and passes through the pump head assembly. A limit head and a threaded joint are arranged at the outer end of the conductive column. The limit head is in limit fit with the outer end of the pump head assembly. The threaded joint is located outside the limit head. A threaded section and an open joint are arranged at the inner end of the conductive column. A nut is arranged on the threaded section. The nut is in limit fit with the inner end of the pump head assembly. The open joint is located inside the threaded section.
[0006] A press-fitting step is arranged between the outer circle of the impeller assembly and the inner circle of the housing. The corresponding second O-ring seal is arranged between the press-fitting steps.
[0007] Both the first O-ring seal and the second O-ring seal are made of silicone rubber or nitrile rubber.
[0008] The beneficial effects of the present utility model are as follows: The improved external high-pressure ethanol fuel pump adopts a fully encapsulated armature, an ethanol-resistant sealing ring and a carbon brush, realizing an external fuel pump that can withstand high pressure and is resistant to ethanol fuel (E85), enabling the fuel pump to meet environmental protection and performance requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The specific embodiments of the present utility model will be further described in detail below in conjunction with the accompanying drawings.
[0010] Figure 1 It is a structural schematic diagram of the present utility model. SPECIFIC EMBODIMENTS
[0011] The accompanying drawings show the structure of the present utility model, and its relevant details will be further described below in conjunction with the accompanying drawings. In this embodiment, the external high-pressure ethanol fuel pump includes a housing 1. Inside the housing 1, there are an impeller assembly 2, a stator 3, a rotor 4 and its connecting shaft 5. The rotor 4 is provided with a fully encapsulated armature 6, that is, the armature is coated with polyoxymethylene plastic. The housing 1 is cylindrical, and an oil inlet nozzle 7 is integrally formed at the left end of the housing 1. A pump head assembly 8 is encapsulated at the right end of the housing 1. A first O-ring seal is provided between the pump head assembly 8 and the housing 1. The first O-ring seal 9 is made of ethanol-resistant material. The pump head assembly 8 is provided with positive and negative connectors 10, an oil outlet nozzle 11 and a check valve 12. A filter screen 13 is provided between the oil inlet nozzle 7 and the impeller assembly 2. A second O-ring seal 14 is provided between the impeller assembly 2 and the housing 1. The second O-ring seal 14 is made of ethanol-resistant material. A commutator 15, a wear-reducing plate 16 and a snap ring 17 are successively arranged on the connecting shaft 5 corresponding to the right end of the rotor 4. The wear-reducing plate 16 is limited to the right end of the commutator 15 by the snap ring 17. The brush of the commutator 15 is a carbon brush, and the carbon brush has ethanol resistance. The above uses a fully encapsulated armature 6, an ethanol-resistant sealing ring and a carbon brush to realize the ethanol resistance of the fuel pump.
[0012] As a specific embodiment of further improvement, the positive and negative connectors 10 each include a conductive column 18. The conductive column 18 is hermetically penetrated through the pump head assembly 8. A sealing ring is provided between the corresponding conductive column 18 and the pump head assembly 8. A limit head 19 and a threaded joint 20 are provided at the outer end of the conductive column 18. The limit head 19 is in limit fit with the outer end of the pump head assembly 8. The threaded joint 20 is located outside the limit head 19. The threaded joint 20 is used to connect an external power supply. A threaded section 21 and an open joint 22 are provided at the inner end of the conductive column 18. A nut 23 is provided for the threaded section 21. The nut 23 is in limit fit with the inner end of the pump head assembly 8. The open joint 22 is located inside the threaded section 21. The open joint 22 is used to connect the carbon brush.
[0013] As a specific implementation of further improvement, a fitting press - fit step 15 is provided between the outer circle of the impeller assembly 2 and the inner circle of the housing 1. Correspondingly, the second O - ring seal 14 is arranged between the press - fit steps 24 and is limited and fitted to the outer circle of the impeller assembly 2 and the inner circle of the housing 1 by the press - fit steps 24.
[0014] As a specific implementation of further improvement, both the first O - ring seal 9 and the second O - ring seal 14 are made of silicone rubber or nitrile rubber and have the characteristic of ethanol resistance.
[0015] In summary, the above is only the preferred embodiment of the present utility model and is not used to limit the protection scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. External high-pressure ethanol fuel pump, comprising a housing, wherein an impeller assembly, a stator, a rotor and its connecting shaft are arranged in the housing, and a fully-covered armature is arranged on the rotor, characterized in that: The housing is cylindrical, and an oil inlet nozzle is integrally formed at the left end of the housing. A pump head assembly is encapsulated at the right end of the housing. A first O-ring seal is provided between the pump head assembly and the housing. The first O-ring seal is made of ethanol-resistant material. The pump head assembly is provided with positive and negative connectors, an oil outlet nozzle and its check valve. A filter screen is provided between the oil inlet nozzle and the impeller assembly. A second O-ring seal is provided between the impeller assembly and the housing. The second O-ring seal is made of ethanol-resistant material. A commutator, a wear-reducing plate and a snap ring are sequentially provided on the connecting shaft corresponding to the right end of the rotor. The brush of the commutator is a carbon brush.
2. The external high-pressure ethanol fuel pump according to claim 1, wherein: Each of the positive and negative connectors includes a conductive column. The conductive column is sealed and passes through the pump head assembly. A limit head and a threaded joint are provided at the outer end of the conductive column. The limit head is in limit fit with the outer end of the pump head assembly. The threaded joint is located outside the limit head. A threaded section and an open joint are provided at the inner end of the conductive column. A nut is provided for the threaded section. The nut is in limit fit with the inner end of the pump head assembly. The open joint is located inside the threaded section.
3. The external high-pressure ethanol fuel pump according to claim 1, characterized in that: A mating press-fit step is provided between the outer circle of the impeller assembly and the inner circle of the housing. The corresponding second O-ring seal is provided between the press-fit steps.
4. The external high-pressure ethanol fuel pump according to claim 1, characterized in that: Both the first O-ring seal and the second O-ring seal are made of silicone rubber or nitrile rubber.