CN2537835Y

CN2537835Y - Double screw pump

Info

Publication number: CN2537835Y
Application number: CN 02231964
Authority: CN
Inventors: 朱红渭
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-22
Filing date: 2002-04-22
Publication date: 2003-02-26
Anticipated expiration: 2012-04-22

Abstract

A hydraulic pump. A screw rod is inserted into the screw thread of another screw rod which have different rotating directions, the inserting is parallel and closed, and the two screw rods are assembled in to the pump body with a small gap with the pump casing, to perform synchronous reverse rotation, the fluid flow enters into the high pressure cavity from the low pressure cavity along the screw thread of the screw rod under the screw thread function of the screw rod, to accomplish the purpose of very high fluid pressure, and the utility model is suitable for the media of water, water solution, oil and dense fluid.

Description

Two screw pump

The utility model relates to a kind of new pump class that is formed hydraulic pressure by two screw rods cooperation rotations in the pump class.

At present, the kind of oil hydraulic pump has plunger pump, gear pump, vane pump, and its characteristics are respectively plunger pump: the pressure height, and compact structure, the efficient height, the convenient but complex structure of Flow-rate adjustment, cost is higher; External gear pump: simple in structure, easily manufactured, cheap, reliable operation, suction capacity is strong, but is difficult to reach high pressure, and noise is bigger, and transfusion is uneven, and is easy to wear; Crescent gear pump: noise is less, and amount of infusion is even, and volume is little, and is in light weight, but makes complexity, and cost is higher; Vane pump: it is low to have a noise, and flow is even, and volume is little, and the life-span is long, and but to the liquid contamination sensitivity, suction capacity is poor, complex structure, technological requirement height, cost height.Sum up all types of oil hydraulic pump characteristics, the contrast of advantage and defect part, not perfect type.

The purpose of this utility model provides a kind of two screw pump, it can not only low noise, long-life, high pressure, high efficiency, be suitable for that broad spectrum activity, suction capacity are strong, Flow-rate adjustment is worked easily, and simple in structure, easily manufactured, cheap, the newtype pump of reliable operation.

The purpose of this utility model be achieved in that two isometrical, uniform pitch, etc. helical pitch, etc. screwing length, the square type screw rod of different rotation directions, each key is connected with the same number of teeth in the same side of screw rod, with the identical straight toothed spur gear in footpath in modulus standard pitch diameter and the screw rod, two screw rods are tangent by footpath circle in tapered roller bearing and deep groove ball bearing supporting and the two screw rods, the gear compound graduation circle is tangent, screw rod external diameter and pump housing inwall are less gap, rotatable cooperation is assemblied in the pump case, the height of pump, seal by seal ring between low-pressure cavity and the bearing, between the high low pressure chamber of pump, because between the two screw rods, thread and alveolus are meshing with each other and are closed state, screw rod external diameter and pump housing inner arm also are very little gap simultaneously, the rotatable cooperation, then every circle alveolus of two screw rods is except that the space of engagement the position, it all is the hydraulic work chamber, during work, a screw rod is rotatablely moved as orientation by the external force transmission, by gear transmission another screw rod is rotatablely moved as reverse sync, in the motion, liquid stream flows into the hydraulic work chamber in the low-pressure cavity, by the effect of the other side's screw rod thread, along the mobile pressure that forms in being pressed into hyperbaric chamber of screw rod alveolus.

Since adopt such scheme, can be by screw speed control pump flow, because of its kinematic pair is high secondary motion, so its life-span is long, noise is low, and it adopts helix transmission carrier fluid stream simultaneously, so can hanging down the power input, it finishes high pressure output ground work, and flow is even, and suction capacity is strong, reliable operation, its member is few in addition, simple in structure, easily manufactured, cheap.

Below in conjunction with drawings and Examples, the utility model is described in further detail:

Fig. 1 is a longitudinal section of the present utility model tectonic maps.

Fig. 2 is the I-I sectional view among Fig. 1.

Among the figure: 1. 9. delivery outlets, 10. low-pressure cavity, 11. hyperbaric chambers, 12. flat keys, 13. hydraulic work chambeies, pump case 2. right handed screw axles 3. left handed screw axles 4. cylindric straight-tooth gears, 5. seal rings, 6. deep groove ball bearings, 7. tapered roller bearings, 8. inlet openings

See Fig. 1, Fig. 2, right handed screw axle (2) all is connected with cylindric straight-tooth gear (4) by flat key (12) with the same side of left handed screw axle (3), the thread of two screw rods axle respectively inserts in the other side's alveolus, parallel driving fit, be assemblied in the pump case (1) by deep groove ball bearing (6) and tapered roller bearing (7) supporting, every circle alveolus of two screw axiss and pump case (1) inwall form a hydraulic work chamber (13), the inwall of two screw axis screw thread both sides unthreaded portions and pump case (1) forms low-pressure cavity (10) and hyperbaric chamber (11), low-pressure cavity (10) is by inlet opening (8) and outer communications and liaison, hyperbaric chamber (11) is sealed by seal ring (5) between low-pressure cavity (10) and hyperbaric chamber (11) and each bearing by delivery outlet (9) and outer communications and liaison.

Claims

A kind of two screw pump, it is characterized in that: two different rotation directions, etc. the screw rod of helical pitch, uniform pitch, thread inserts parallel driving fit in the other side's alveolus mutually, the bearing supporting, be less gap with housing and be assemblied in movingly in the pump case, two screw rods are made synchronous backward by gear transmission and are rotated.