CN2241782Y

CN2241782Y - Double-pressure combined pump

Info

Publication number: CN2241782Y
Application number: CN 96227151
Authority: CN
Inventors: 王永清
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-01-18
Filing date: 1996-01-18
Publication date: 1996-12-04
Anticipated expiration: 2006-01-18

Abstract

The utility model relates to a double-pressure combined pump which comprises a high-pressure small flow CB-E1.50 type oil pump or a stable four-cylinder radial plunger piston P4GB2.5 type oil pump (1) and a low-pressure high flow CB-B type oil pump (6). The utility model is characterized in that an oil inlet (10) and a pressure oil outlet (11) are arranged at the CB-B type oil pump rear cover (5) or both sides of an oil pump cavity, the outer end surface of the shaft hole of the drive shaft of the rear cover is provided with a fix threaded hole (8) which is connected with the high-pressure oil pump (1), and a notch (2) is arranged at the rear end of the drive shaft of the CB-B type oil pump (6). The utility model has the advantages of compact structure, small size, light weight, low cost, good coaxiality, motive power saving, electric energy saving, convenience for installation and debugging, and steady running.

Description

Two pressure unipumps

The utility model relates to a kind of pump.

Along with hydraulics is widely used for multiple production field, requirement to hydraulic pressure installation also becomes varied, hydraulic pressure installation for example to using in the rubber machine, need the low pressure rapid movement when just requiring zero load, then require the high pressure low-speed motion during load, the someone adopts twin shaft to stretch motor for this reason, and its two ends are installed a high-pressure low-flow pump and a low pressure and mass flow pump respectively, also the someone makes off-gauge three cylinder crankshaft oil pumps by oneself, and it is connected with the low pressure fuel pump of standard; The somebody connects together vane pump and high-pressure gear pump CB03-4.The axial dimension that the unipump of these several patterns has is excessive, and the non-standard component that has is too much, and structure more complicated all, the cost height.

The purpose of this utility model provides a kind of pair of pressure unipump, and it can remedy the above-mentioned deficiency of existing unipump.

The utility model comprises that a high-pressure low-flow CB-E1.50 type oil pump or steady four cylinder diameters are to plunger P4GB2.5 type oil pump and a low pressure and mass flow CB-B type oil pump, it is characterized in that inlet port and pressure oil outlet place the both sides of CB-B type oil pump rear lid both sides or oil pump cavity, the fixing threaded hole that connects high pressure oil pump is arranged on the driving shaft axis hole exterior edge face of this bonnet, and the driving shaft rear end of CB-B type oil pump has notch.

The utility model has the advantages that compact structure, volume is little in light weight, and cost is low, and coaxality is good, saves power and electric energy during use, is convenient to Installation and Debugging, and running steadily.

Further specify the utility model below by embodiment and accompanying drawing.

Accompanying drawing 1 is a structural representation of the present utility model.

Accompanying drawing 2 is its side view.

The utility model combines a high-pressure low-flow CB-E1.50 type oil pump or steady four cylinder diameters to a plunger P4GB2.5 type oil pump (1) and a low pressure and mass flow CB-B type oil pump (6), inlet port (10) and pressure oil outlet (11) are placed the both sides of the bonnet (5) or oil pump (6) cavity of CB-B type oil pump (6), after this, be stamped the location stop ring oral pore (7) and the O type sealing platform (3) that process high pressure oil pump (1) on the exterior edge face of driving shaft (4) axis hole, on the exterior edge face, also process the fixing threaded hole (8) that connects high pressure oil pump (1), bonnet (5) is thickeied, suitably extended in driving shaft (3) rear end, so that process notch (2) in its rear end, the flat axle of high-pressure low-flow oil pump (1) is inserted in this notch (2), and high-pressure low-flow oil pump (1) is fixed on the bonnet (5) with screw (9).Like this, the coaxial rotation fuel feeding of high low pressure oil pump, two pumps fuel feeding simultaneously during low pressure, when working pressure is elevated to certain value, low pressure and mass flow oil pump (6) drain charge, high-pressure low-flow oil pump (1) specified pressure that then works on.

Claims

1. two pressure unipump, comprise that a high-pressure low-flow CB-E1.50 type oil pump or steady four cylinder diameters are to a plunger P4GB2.5 type oil pump (1) and a low pressure and mass flow CB-B type oil pump (6), it is characterized in that inlet port (10) and pressure oil outlet (11) place the both sides of CB-B type oil pump rear lid (5) or oil pump cavity, the fixing threaded hole (8) of connection high pressure oil pump (1) is arranged on the exterior edge face of the driving shaft axis hole of this bonnet, and the driving shaft rear end of CB-B type oil pump (6) has notch (2).

2. as claimed in claim 1 pair of pressure unipump is characterized in that having on the driving shaft axis hole exterior edge face of described bonnet (5) the location stop ring oral pore (7) of high pressure oil pump (1) and O shape to seal platform (3).