CN218991856U - Radial distributed high-pressure variable oil injection pump lubricated by engine oil - Google Patents
Radial distributed high-pressure variable oil injection pump lubricated by engine oil Download PDFInfo
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- CN218991856U CN218991856U CN202223514592.8U CN202223514592U CN218991856U CN 218991856 U CN218991856 U CN 218991856U CN 202223514592 U CN202223514592 U CN 202223514592U CN 218991856 U CN218991856 U CN 218991856U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model discloses a radial distributed high-pressure variable oil injection pump lubricated by engine oil, which comprises a pump body, a driving shaft and a bidirectional framework oil seal, wherein the bidirectional framework oil seal divides the interior of the pump body into a working cavity and a lubricating oil cavity which are mutually independent; a plurality of pump oil systems arranged along the circumferential direction of the pump body and an oil delivery pump arranged on the pump body; the driving shaft is provided with a cam, the cam is abutted against a plurality of tappet bodies, the upper end of each tappet body corresponds to a pump oil system, and the pump oil system is arranged on the pump body through a fastener; the pump body is provided with pressure balance oil channels along the radial direction, and the pressure balance oil channels are respectively communicated with the lubricating oil cavity; a lubricating oil joint seat is arranged at an inlet on the pump body; the oil delivery pump is arranged on the working cavity of the pump body, and the driving shaft in the pump body is connected with the transmission shaft of the oil delivery pump through a coupling. The oil way is reasonably arranged, so that interference and oil way communication in a limited volume are avoided.
Description
Technical Field
The utility model belongs to the technical field of high-pressure variable oil injection pumps of common rail systems of diesel engines, and particularly relates to a radial distributed high-pressure variable oil injection pump lubricated by engine oil.
Background
The high-pressure variable oil injection pump (hereinafter referred to as high-pressure pump) of the common rail system of the diesel engine is a core component of the fuel injection system, the oil supply capacity of the high-pressure variable oil injection pump directly determines the platform pressure and the application range of the common rail system, the existing high-pressure pump is mainly distributed in an in-line mode and a radial distributed mode according to the arrangement mode, the in-line high-pressure pump is mainly lubricated by engine oil due to the arrangement characteristics and the technological route, the radial distribution is mainly lubricated by diesel oil due to the lubrication mode, and the applicable engines and the arrangement on the whole engine are different due to the different lubrication modes.
Due to the inherent lubrication characteristic of the engine oil lubrication type high-pressure pump, the material requirements and cleanliness requirements of parts of the high-pressure pump are reduced, and larger load can be borne under the same conditions, so that higher oil pressure and better oil supply capacity can be provided, but the engine oil lubrication type high-pressure pump is provided with one more lubricating oil way, so that the high-pressure pump oil way is more complex and is more difficult to realize under the limited space and cost constraint.
Therefore, the oil way arrangement scheme for oil lubrication on the radially distributed high-pressure pump and the reasonable arrangement of the diesel oil way avoid interference and oil way communication in a limited volume, thereby providing the radially distributed high-pressure variable oil injection pump adopting oil lubrication.
Disclosure of Invention
Aiming at the problems existing in the prior art, the utility model provides a radial distributed high-pressure variable oil injection pump which is used for avoiding interference in a limited volume and oil way communication and is lubricated by engine oil.
The present utility model has been achieved in such a way that,
the utility model provides an adopt radial distributed formula high pressure variable injection pump of machine oil lubrication which characterized in that: the oil pump comprises a pump body (1) and a driving shaft (7), wherein a bidirectional framework oil seal (22) is arranged in the pump body, and the bidirectional framework oil seal divides the pump body into a working cavity (22-1) and an lubricating oil cavity (22-2) which are mutually independent;
a plurality of pump oil systems (9) arranged along the circumferential direction of the pump body and an oil delivery pump (19) arranged on the pump body; the two ends of the driving shaft are arranged in the pump body through bearings;
a cam (6-1) is arranged on the driving shaft between the two bearings, the cam is abutted with a plurality of tappet bodies (6-2), the upper end of each tappet body corresponds to a pumping oil system, and the pumping oil system is arranged on the pump body through a fastener; the bearing, the cam and the tappet body are positioned in the lubricating oil cavity; the pump body is provided with a pressure balance oil duct along the radial direction; the pump body is provided with an inlet for forced lubrication pressure of lubricating oil and is provided with a lubricating oil joint seat (10);
an oil delivery pump (19) is arranged on a working cavity of the pump body, and the driving shaft (7) in the pump body is connected with a transmission shaft (20) of the oil delivery pump through a coupling (21); an oil inlet (11) and an oil outlet (15) are arranged on the pump body, and a proportional valve (16) for controlling the oil quantity entering the pump oil system is also arranged on the pump body; and the pump body is provided with an overflow valve (12), and the overflow valve is communicated with the oil outlet.
Preferably, the oil transfer pump (19) comprises an oil transfer pump body (51), a driving gear (56) arranged on the oil transfer pump body, wherein the driving gear (56) is arranged on the transmission shaft (20), the driving gear is meshed with a driven gear (55), and a pump cover (53) is arranged on the oil transfer pump body through a fastening bolt (54).
Preferably, a pressure limiting valve (57) for preventing oil pressure overload and a plug (52) for sealing the processing process oil duct are arranged on the oil delivery pump body.
Preferably, an exhaust valve (13) communicated with the exhaust oil duct of the pump body is arranged on the pump body.
Preferably, the transmission shaft of the oil delivery pump adopts an integrated structure and comprises a gear driving part (62) and a coupler pusher dog (61) connected with the coupler (21).
The utility model has the advantages and technical effects that: the utility model provides an oil way arrangement solution for lubricating engine oil for the radial distributed high-pressure pump, and a pressure balance oil way is independently designed for each cylinder, so that the radial distributed high-pressure pump or the in-line high-pressure pump with multi-cylinder distribution can be applied; in addition, the functional oil duct, the mounting hole and the fastening bolt hole of the pump body are staggered in the pump body, most of the functional oil duct is parallel or perpendicular to the main functional surface, the processing technology is simple, and the processing of a processing center is convenient; the high-pressure pump with the distributed structure adopts the roller bearing, and adopts engine oil lubrication, thereby effectively providing the service life of the oil pump.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of the pump body of the present utility model;
FIG. 3 is an oil circuit layout of the present utility model;
FIG. 4 is a schematic diagram of the oil transfer pump;
FIG. 5 is a schematic view of a drive shaft configuration;
fig. 6 is a schematic diagram of the oil passage control of the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1 to 5, a radial distributed high-pressure variable injection pump lubricated by engine oil is characterized in that: the two-way framework oil seal is arranged in the pump body and divides the pump body into a working cavity 22-1 and a lubricating oil cavity 22-2 which are mutually independent;
a plurality of pump oil systems 9 arranged along the circumferential direction of the pump body and an oil delivery pump 19 arranged on the pump body; the two ends of the driving shaft are arranged in the pump body through bearings; the bearings adopt tapered roller bearings 2 and 3, wherein a shaft 2 is arranged in a pump body 1, a bearing 3 is arranged in a bearing seat 5, and the bearing seat 5 is fastened on the pump body 1 through a screw assembly 4.
A cam 6-1 is arranged on the driving shaft between the two bearings and is abutted against a plurality of tappet bodies 6-2, the upper end of each tappet body corresponds to a pump oil system, and the pump oil systems 9 are distributed around the driving shaft 7 at a certain included angle in the circumferential direction; the pump oil system is arranged on the pump body through a fastening piece 8; the driving shaft 7 drives the tappet body 6 to reciprocate up and down in the pump body 1 through a cam mechanism by rotating to drive the pump oil system 9 to pump fuel; the bearing, the cam and the hearing cylinder are positioned in the lubricating oil cavity; the pump body is provided with a pressure balance oil duct along the radial direction; the inlet provided with the forced lubrication pressure of the lubricating oil on the pump body is provided with a lubricating oil joint seat 10; the lubricating oil joint seat is used for connecting forced lubricating oil conveyed by an engine to lubricate a bearing, a tappet body and the like, the pressure balance oil duct is the pressure balance requirement of an engine oil cavity of the oil pump, and the lubricating oil enters the lubricating oil duct of the pump body through the lubricating oil joint seat to lubricate the tappet body 6, the bearings 2 and 3 and the driving shaft 7.
An oil delivery pump 19 is arranged on a working cavity of the pump body, and the driving shaft 7 in the pump body is connected with a transmission shaft 20 of the oil delivery pump through a coupler 21; an oil inlet 11 and an oil outlet 15 are arranged on the pump body, the driving shaft 7 drives a transmission shaft 20 of an oil delivery pump 19 fastened on the pump body 1 through a screw group 18 to rotate, so that the oil delivery pump 19 sucks fuel oil into the pump body 1 from the inlet 11, and a proportional valve 16 for controlling the oil quantity of the oil system entering the pump is also arranged on the pump body through a screw assembly 14; and the pump body is provided with an overflow valve 12 which is communicated with the oil outlet, and redundant oil flows back from the oil outlet 15 after being regulated by the overflow valve 12.
Preferably, the oil transfer pump 19 comprises an oil transfer pump body 51, a driving gear 56 arranged on the oil transfer pump body, the driving gear 56 is arranged on the transmission shaft 20, the driving gear is meshed with a driven gear 55, and a pump cover 53 is arranged on the oil transfer pump body through a fastening bolt 54.
Preferably, a pressure limiting valve 57 for preventing oil pressure overload and a plug 52 for sealing the processing oil passage are arranged on the oil delivery pump body.
Preferably, an exhaust valve 13 communicated with the exhaust oil duct of the pump body is arranged on the pump body.
Preferably, the transmission shaft of the oil transfer pump adopts an integrated structure, and comprises a gear driving part 62 and a coupling pusher dog 61 connected with the coupling 21. Therefore, the oil transfer pump can be clamped on a machine tool once to finish machining, and unstable and even failure of the oil transfer pump caused by the asymmetry of the coupler finger 61 to the coupler finger 62 is avoided.
The working oil supply control process comprises the following steps:
pump body diesel oil duct: after entering the pump body from the joint seat 11, the oil outlet of the oil transfer pump 19 enters the oil duct 32 through the mounting hole 31 of the proportional valve 16, then enters the oil duct 34, and enters the pump oil system through the oil duct 34 to form high-pressure oil.
Pump body lubricating oil duct: lubricating oil enters the pump body from the joint seat 10, a pressure oil cavity is formed in the cavity 41, the lubricating oil enters the tappet body and the driving shaft through the oil duct 42 for lubrication, and after lubrication, the pressure relief flows into the cavity of the pump body through the oil duct 43 and then flows out of the bearing seat.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (5)
1. The utility model provides an adopt radial distributed formula high pressure variable injection pump of machine oil lubrication which characterized in that: the oil pump comprises a pump body (1) and a driving shaft (7), wherein a bidirectional framework oil seal (22) is arranged in the pump body, and the bidirectional framework oil seal divides the pump body into a working cavity (22-1) and an lubricating oil cavity (22-2) which are mutually independent;
a plurality of pump oil systems (9) arranged along the circumferential direction of the pump body and an oil delivery pump (19) arranged on the pump body; the two ends of the driving shaft are arranged in the pump body through bearings;
a cam (6-1) is arranged on the driving shaft between the two bearings, the cam is abutted with a plurality of tappet bodies (6-2), the upper end of each tappet body corresponds to a pumping oil system, and the pumping oil system is arranged on the pump body through a fastener; the bearing, the cam and the tappet body are positioned in the lubricating oil cavity; the pump body is provided with a pressure balance oil duct along the radial direction; the pump body is provided with an inlet for forced lubrication pressure of lubricating oil and is provided with a lubricating oil joint seat (10);
an oil delivery pump (19) is arranged on a working cavity of the pump body, and the driving shaft (7) in the pump body is connected with a transmission shaft (20) of the oil delivery pump through a coupling (21); an oil inlet (11) and an oil outlet (15) are arranged on the pump body, and a proportional valve (16) for controlling the oil quantity entering the pump oil system is also arranged on the pump body; and the pump body is provided with an overflow valve (12), and the overflow valve is communicated with the oil outlet.
2. The radially distributed high-pressure variable injection pump using oil lubrication according to claim 1, wherein: the oil transfer pump (19) comprises an oil transfer pump body (51), a driving gear (56) arranged on the oil transfer pump body, the driving gear (56) is arranged on the transmission shaft (20), the driving gear is meshed with a driven gear (55), and a pump cover (53) is arranged on the oil transfer pump body through a fastening bolt (54).
3. The radially distributed high-pressure variable injection pump using oil lubrication according to claim 1, wherein: the oil delivery pump body is provided with a pressure limiting valve (57) for preventing oil pressure overload and a plug (52) for sealing the oil passage of the processing technology.
4. The radially distributed high-pressure variable injection pump using oil lubrication according to claim 1, wherein: an exhaust valve (13) communicated with the exhaust oil duct of the pump body is arranged on the pump body.
5. The radially distributed high-pressure variable injection pump using oil lubrication according to claim 1, wherein: the transmission shaft of the oil delivery pump adopts an integrated structure and comprises a gear driving part (62) and a coupler pusher dog (61) connected with the coupler (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223514592.8U CN218991856U (en) | 2022-12-28 | 2022-12-28 | Radial distributed high-pressure variable oil injection pump lubricated by engine oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223514592.8U CN218991856U (en) | 2022-12-28 | 2022-12-28 | Radial distributed high-pressure variable oil injection pump lubricated by engine oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218991856U true CN218991856U (en) | 2023-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223514592.8U Active CN218991856U (en) | 2022-12-28 | 2022-12-28 | Radial distributed high-pressure variable oil injection pump lubricated by engine oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218991856U (en) |
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2022
- 2022-12-28 CN CN202223514592.8U patent/CN218991856U/en active Active
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