CN202125717U

CN202125717U - NSE type rotor oil pump

Info

Publication number: CN202125717U
Application number: CN2011202118527U
Authority: CN
Inventors: 许仲秋; 刘光明; 佘笑梅
Original assignee: Hunan Oil Pump Co Ltd
Current assignee: Hunan Oil Pump Co Ltd
Priority date: 2011-06-21
Filing date: 2011-06-21
Publication date: 2012-01-25
Anticipated expiration: 2021-06-21

Abstract

The utility model discloses an NSE type rotor oil pump, which comprises a pump body, a pump cover, an inner rotor, an outer rotor, a transmission shaft, a chain wheel and a pressure-limiting valve accessory. A valve cavity, a valve hole and a circulation oil channel are arranged in the pump body, the valve hole and the circulation oil channel are arranged on a lateral side of the valve cavity, one end of the circulation oil channel is communicated with the valve cavity, and the other end of the circulation oil channel is communicated with the valve hole through a pressure discharging oil hole arranged at the bottom of the valve hole. A decompression oil hole connecting the valve cavity and the valve hole is arranged on a lateral side of the valve hole close to the bottom. The transmission shaft is arranged in shaft holes of the pump body and the pump cover through a shaft, the middle of the oil pump is connected with the inner rotor and driven by the transmission shaft, and the chain wheel is arranged at the input end of the transmission shaft through keys. The inner rotor and the outer rotor are arranged in the valve cavity, the outer rotor is sleeved on the inner rotor and driven by the inner rotor, and the pressure-limiting valve accessory is arranged in the valve hole. The NSE type rotor oil pump adopts a chain wheel transmission mode with simple structure, and simultaneously adopts a pressure-limiting valve structure which uses a bottom hole and the lateral side to decompress, thereby improving safety and reliability of the oil pump, and prolonging service life of the oil pump.

Description

NSE type rotor engine oil pump

Technical field

The utility model relates to a kind of rotor engine oil pump, particularly with the supporting NSE type rotor engine oil pump of a kind of new work engine.

Background technique

At present, do not have supporting oil pump, and technical parameter such as the relevant rotating speed of existing other oil pump and NSE type motorcar engine, engine oil pressure, flow is complementary with NSE type motorcar engine.

The model utility content

The utility model technical problem to be solved is to provide a kind of NSE type rotor engine oil pump that matches with NSE type motorcar engine, with the NSE type rotor engine oil pump in Security, reliability and working life of improving motor.

The utility model technical problem to be solved can realize through following technological scheme:

A kind of NSE type rotor engine oil pump; It comprises the pump housing, pump cover, internal rotor, external rotor, transmission shaft, sprocket wheel and pressure-limit valve duplicate; In the said pump housing, be provided with valve pocket, valve opening and circulation oil duct, said valve opening and circulation oil duct are arranged on the side of valve pocket, and an end of said circulation oil duct is communicated with said valve pocket; The other end is communicated with valve opening through the row pressure oilhole that is arranged on said valve opening bottom, and said valve opening is provided with the pressure release oilhole that is communicated with valve pocket and valve opening near the side of bottom; Said pump cover is installed in said transmission shaft, internal rotor, external rotor in the said pump housing; Wherein transmission shafts is located in the axis hole of the pump housing and pump cover; The middle part of transmission shaft is connected by transmission shaft with internal rotor and drives; One end of transmission shaft extends the input end that pump cover forms transmission shaft outward, and steering sprocket key is located on the input end of said transmission shaft, and inside and outside rotor is arranged in the said valve pocket and external rotor is enclosed within on the internal rotor and is driven by internal rotor; Said pressure-limit valve duplicate is installed in the said valve opening.

The pressure-limit valve duplicate of the utility model comprises in order to open and close pressure-limit valve plunger, spring and the plug screw of row pressure oilhole, pressure release oilhole; Wherein plug screw is installed in pressure-limit valve plunger, spring in the said valve opening, and said spring is between plug screw and pressure-limit valve plunger.

Said NSE type rotor engine oil pump, with the supporting relevant technologies parameter that should reach of motor be: as oil pump per minute 1905 ± 10r/min, its oil pump outlet pressure is 3.77bar, flow >=17lpm; Oil pump per minute 5236r/min is 3.77bar at the oil pump outlet pressure, and its flow is >=54lpm.

The utlity model has following characteristics:

The utility model is according to the engine lubrication performance demands, and the specific condition of transmission system and technical parameter, adopts sprocket driving mode simple in structure; Simultaneously, offer space and Placement that oil pump is installed during according to designed engines, adopt the pressure-limit valve structure of bottom outlet row pressure and side pressure release, the Security that has improved oil pump, reliability and working life; Because the pressure oil that excretes from pressure-limit valve leaks into oil suction chamber again, therefore, can reduce oil pump self energy consumption, improve pump oil efficient and reduce the engine power loss.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is Figure 1A-A pressure-limit valve generalized section.

Embodiment

Further describe below in conjunction with accompanying drawing and embodiment detailed structure the utility model.

As depicted in figs. 1 and 2, a kind of NSE type rotor engine oil pump, it comprises the pump housing 1, pump cover 2, internal rotor 3 and external rotor 4, transmission shaft 5, sprocket wheel 6 and pressure-limit valve duplicate.

In the pump housing 1, be provided with valve pocket 13, valve opening 14 and circulation oil duct 15; Valve opening 13 and circulation oil duct 15 are arranged on the side of valve pocket 13; One end of circulation oil duct 15 is communicated with valve pocket 13; The other end is communicated with valve opening 13 through the row pressure oilhole 11 that is arranged on valve opening 13 bottoms, and valve opening 13 is provided with the pressure release oilhole 12 that is communicated with valve pocket 13 and valve opening 14 near the side of bottom.

Pump cover 2 is installed in transmission shaft 5, internal rotor 3, external rotor 4 in the pump housing 1; Wherein transmission shaft 5 is located in the axis hole of the pump housing 1 and pump cover 2; The middle part of transmission shaft 5 is connected with internal rotor 3 by transmission shaft 5 drivings; One end of transmission shaft 5 extends the pump cover 2 outer input ends that form transmission shaft 5, and sprocket wheel 6 keys are located on the input end of transmission shaft 5, and inside and outside rotor 3,4 is arranged in the valve pocket 13 and external rotor 4 is enclosed within on the internal rotor 3 by internal rotor 3 drivings.

The pressure-limit valve duplicate comprises that wherein plug screw 9 is installed in pressure-limit valve plunger 7, spring 8 in the valve opening 14, and spring 8 is between plug screw 9 and pressure-limit valve plunger 7 in order to open and close pressure-limit valve plunger 7, spring 8 and the plug screw 9 of row pressure oilhole 11, pressure release oilhole 12.

When in the oil pump during oil pressure superelevation; Pressure oil gets in the valve opening 14 from circulation oil duct 15, row pressure oilhole 11, and behind pressure-limit valve plunger 7 outside promotion certain distances, pressure oil is immediately through pressure release oilhole 12; Enter and implement circulation for the second time in the valve pocket 13, this is that spring 8 is compressed accumulation of energy.After oil pressure in the oil pump was up to standard, spring 8 discharged, and pressure-limit valve plunger 7 was inwardly promoted, to close row pressure oilhole 11 and pressure release oilhole 12.

Claims

1. NSE type rotor engine oil pump; It is characterized in that; Comprise the pump housing, pump cover, internal rotor, external rotor, transmission shaft, sprocket wheel and pressure-limit valve duplicate; In the said pump housing, be provided with valve pocket, valve opening and circulation oil duct, said valve opening and circulation oil duct are arranged on the side of valve pocket, and an end of said circulation oil duct is communicated with said valve pocket; The other end is communicated with valve opening through the row pressure oilhole that is arranged on said valve opening bottom, and said valve opening is provided with the pressure release oilhole that is communicated with valve pocket and valve opening near the side of bottom; Said pump cover is installed in said transmission shaft, internal rotor, external rotor in the said pump housing; Wherein transmission shafts is located in the axis hole of the pump housing and pump cover; The middle part of transmission shaft is connected by transmission shaft with internal rotor and drives; One end of transmission shaft extends the input end that pump cover forms transmission shaft outward, and steering sprocket key is located on the input end of said transmission shaft, and inside and outside rotor is arranged in the said valve pocket and external rotor is enclosed within on the internal rotor and is driven by internal rotor; Said pressure-limit valve duplicate is installed in the said valve opening.

2. NSE type rotor engine oil pump as claimed in claim 1; It is characterized in that; Described pressure-limit valve duplicate comprises in order to open and close pressure-limit valve plunger, spring and the plug screw of row pressure oilhole, pressure release oilhole; Wherein plug screw is installed in pressure-limit valve plunger, spring in the said valve opening, and said spring is between plug screw and pressure-limit valve plunger.