초록 ▼

Horizontal Crankshaft Hermetic Compressor for use in refrigeration appliances. According to the present invention the compressor is fitted out with an oil pump having features of positive displacement, which ensures even at start up moments of the compressor an efficient lubrication of the bearings.

Horizontal Crankshaft Hermetic Compressor for use in refrigeration appliances. According to the present invention the compressor is fitted out with an oil pump having features of positive displacement, which ensures even at start up moments of the compressor an efficient lubrication of the bearings. The oil pump proposed has low energy consumption and supplies a continuous and adequate oil flow for lubricating the compressor without affecting in any perceivable manner its efficiency. According to the invention, the oil pump comprises a cylindric and eccentric portion (23) of the crankshaft (7) which is disposed with a flexible blade (25) within a cylindrical housing (26). This cylindrical housing (26) is provided in one of the bearings (5,6) supporting the crankshaft (7) or in a front cover (37) of the sub bearing (6). The blade (25) defines with the housing (26) an admission (29) and a pressure chamber (30) of the oil pump which are in fluid communication respectively with the oil sump (34) and the parts of the compressor unit requiring lubrication.

대표청구항 ▼

A Horizontal Crankshaft Hermetic Compressor, comprising a compressor unit having a cylinder which houses a piston, the piston being driven by a crankshaft which is supported by a main bearing and a sub bearing; an oil pump defined around a portion of the crankshaft and in fluid communication with a

A Horizontal Crankshaft Hermetic Compressor, comprising a compressor unit having a cylinder which houses a piston, the piston being driven by a crankshaft which is supported by a main bearing and a sub bearing; an oil pump defined around a portion of the crankshaft and in fluid communication with a lubricant oil sump and with parts of the unit requiring lubrication; and a hermetic shell enclosing the compressor unit, the electric motor, the oil pump and the lubricant oil sump, said oil pump comprising a cylindrical and eccentric portion (23) of the crankshaft (7) which is disposed in such a way as to slip within a cylindrical housing (26), said housing (26) being concentric to the geometric axis of the crankshaft (7); at least a curved and lengthened blade element (25) with a width corresponding to an axial length of the cylindrical housing (26), said blade element (25) having at least one edge attached at an attachment location (31) in an interior surface of the housing (26) and being inserted at an area of contact (28) between the cylindrical housing (26) and the eccentric portion (23) so as to define an admission chamber (29) and a pressure chamber (30) in each space of the cylindrical housing (26) defined between the attachment location (31) of the blade element (25) and the area of contact (28), the admission chamber (29) and the pressure chamber (30) being in fluid communication respectively with the lubricant oil collected in the oil sump and with the part of the crankshaft (7) and bearings (5 and 6) requiring lubrication.