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Lubricated automotive vacuum pump

A technology for vacuum pumps and automobiles, applied in the direction of pumps, parts of pumping devices for elastic fluids, pump components, etc., can solve the problems of non-realization of the opening torque of the check valve, damage, noise of the mechanical check valve, etc., and achieve simple structure, improved fluid dynamics, effects of cost-effective production

Inactive Publication Date: 2018-04-17
PIERBURG PUMP TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, check valves usually open at the same pressure difference, so that an optimized opening torque of the check valve cannot be achieved under all pressure conditions
Mechanical check valves are noisy and often damaged

Method used

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  • Lubricated automotive vacuum pump
  • Lubricated automotive vacuum pump
  • Lubricated automotive vacuum pump

Examples

Experimental program
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Effect test

Embodiment Construction

[0025] The drawing shows a lubricated automotive vacuum pump 10 for providing pneumatic low pressure to automotive actuators. The vacuum pump 10 is a mechanical vacuum pump which is mechanically driven by the vehicle engine.

[0026] The vacuum pump 10 is provided with a metallic pump housing 12 substantially defined by two housing parts, namely a pot-shaped outer housing 20 and a cover 14 . The pump housing 12 surrounds the pumping chamber 16 and defines a cylindrical stator friction bearing surface 52 of a rotor friction bearing 50 .

[0027] The vacuum pump 10 is provided with a pump rotor 30 which rotates about an axial axis of rotation 13 . The pump rotor 30 is provided with a cylindrical rotor body 32 provided with radial vane slots 34 supporting vanes 36 movable radially in the vane slots 34 . The rotor body 32 is also provided with a cylindrical rotor friction bearing surface 51 which together with the stator friction bearing surface 52 delimits a friction bearing 50...

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Abstract

The invention refers to a lubricated automotive vacuum pump (10) for providing low-pressure for an automotive actuator, comprising a pump housing (12) housing a pump chamber (16) which is radially defined by a circumferential chamber surface (22), a pump rotor (30) rotating around an axial rotation axis (13), the pump rotor (30) being provided with a rotor body (32) with a vane slit (34) wherein ashiftable vane (36) is shiftably supported which separates the pump chamber (16) into rotating compartments (161, 162), a friction bearing (50) for rotatably supporting the pump rotor (30) at the static pump housing (12), the friction bearing (50) being defined by a cylindrical stator friction bearing surface (52) of the pump housing (12) and a corresponding cylindrical rotor bearing surface (51)of the rotor (30), a pump gas inlet (15) and a separate pump gas outlet (38), an oil inlet channel (60) for providing lubrication oil to the pump rotor (30), and a separate oil outlet opening (411, 412) at the rotor body (32) and an automatic mechanical switchover valve (40) for temporarily connecting the oil outlet opening (411, 412) with an oil drain (70).

Description

technical field [0001] The present invention relates to a lubricated automotive vacuum pump for providing low pressure to automotive actuators. [0002] Automotive vacuum pumps provide a low pressure of less than 500 mbar absolute (mbar) to one or more automotive actuators, for example, a pneumatic brake booster. The vacuum pump is lubricated with oil to reduce mechanical wear, improve aerodynamic efficiency and heat dissipation. Background technique [0003] Liquid lubricant flows into a pump chamber where at least one rotating vane divides the pump chamber into a plurality of rotating compartments. The pump chamber of a conventional vacuum pump is provided with an air outlet fluidly connected to the pump air outlet. If the pump chamber is not provided with a separate oil outlet opening, the liquid lubricant is pumped out of the pump chamber together with the compressed air. Alternatively, the vacuum pump can be provided with a separate static oil outlet opening on the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C25/02F04C18/344F04C29/02
CPCF04C25/02F04C18/3441F04C29/028F04C2220/10
Inventor G.佩罗尼R.斯夸尔奇尼
Owner PIERBURG PUMP TECH
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