CN202833121U

CN202833121U - Circular gear pump

Info

Publication number: CN202833121U
Application number: CN 201220330398
Authority: CN
Inventors: 刘永霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-10
Filing date: 2012-07-10
Publication date: 2013-03-27
Anticipated expiration: 2022-07-10

Abstract

A circular gear pump comprises a pump cover, a small gear, a pump body, an inner gear ring, a seal, a driving shaft, a driven shaft, a rolling bearing, an oil press cavity and an oil absorbing cavity. The gear adopts a sublevel double circular gear, the connection mode is the parabola mode, and the inner gear ring and the small gear are mutually meshed and installed in the pump body. The tooth number of the small gear is 11, the tooth number of the inner gear ring is 13, and the driving tooth face of the small gear is closely combined with teeth of the inner gear ring to form the oil press cavity and the oil absorbing cavity. The shaft end seal is designed to be a mechanical seal. The pump is good in lubrication condition, even in abrasion, good in transmission effect, stable in running, free of liquid leakage, low in noise, long in service life, high in efficiency and free of interference. The parabola increases thickness of tooth roots of recessed teeth and improves bending strength.

Description

A kind of circular-arc gear pump

Technical field

The utility model relates to a kind of gear pump, particularly relates to a kind of circular-arc gear pump.

Background technique

Gear pump is a kind of metallurgical net oil hydraulic pump commonly used, and two kinds of structural types of outer gearing and interior engagement are arranged, in be engaged in the prior art more commonly used.To separate three chip architectures such as GB-B type gear pump, three refer to pump cover and the pump housing, be equipped with in the pump housing that a pair of number of teeth is identical, width and the pump housing equate and intermeshing gear, this forms a Seal cage to gear and two end cap and the pump housing, and by the tooth top of gear and the line of contact of the gear teeth Seal cage is divided into two-part, i.e. oil sucting cavity and pumping cavity.Two gears are keyed on respectively on the driving shaft and driven shaft by needle roller bearing support, and driving shaft is rotated by motor drives.Its major advantage is simple in structure, and is easily manufactured, cheap, and volume is little, lightweight, and self-priming performance is good, and is insensitive to oil contamination, reliable operation.Its shortcoming is that flow pulsation is large, and noise is large, flow non-adjustable (metering pump).The tooth of internal gear is to make an arc section substantially, and this tooth always is in the engagement, causes sizable problem in manufacturing and work engineering, and accuracy of manufacturing is high simultaneously.Wear and tear if be in operation, the oil sucting cavity of pump and the sealing effect between the pumping cavity descend, thereby reduce the efficient of pump.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of circular-arc gear pump is provided.

Circular-arc gear pump described in the utility model comprises pump cover, small gear, the pump housing, ring gear, sealing, driving shaft, driven shaft, rolling bearing, pumping cavity, oil sucting cavity.Gear adopts segment double circular arc gear, and Connecting format is parabolic, and ring gear and small gear are intermeshing, be contained in the pump housing, the small gear number of teeth is 11, and the ring gear number of teeth is 13, the driving flank of tooth of small gear and the tooth of ring gear are combined closely, and form pumping cavity and oil sucting cavity.Shaft end seal is designed to mechanical seal.

The utlity model has good beneficial effect, this pump lubrication condition is good, even wearing, and transmission is effective, smooth running, without the phenomenon of leakage, noise is low, the life-span is long, efficient is high, do not produce interference.Parabola has increased recessed tooth thickness at root of tooth, has improved flexural strength.

Description of drawings

Fig. 1 is the circular-arc gear pump structure diagram, and Fig. 2 is gear shape figure, among the figure:

1 pump cover; 2 screws; 3 small gears; 4 pump housings; 5 ring gears; 6 sealings; 7 driving shafts; 8 driven shafts; 9 rolling bearings; 10 pumping cavities; 11 oil sucting cavities

Embodiment

In conjunction with above-mentioned accompanying drawing the utility model is further described.

Circular-arc gear pump described in the utility model comprises pump cover 1, small gear 3, the pump housing 4, ring gear 5, sealing 6, driving shaft 7, driven shaft 8, rolling bearing 9, pumping cavity 10, oil sucting cavity 11.Gear adopts segment double circular arc gear, Connecting format is parabolic, ring gear 5 is intermeshing with small gear 3, be contained in the pump housing, the small gear number of teeth is 11, and the ring gear number of teeth is 13, and the driving flank of tooth of small gear 3 and the tooth of ring gear are combined closely, slide on the tooth top of pinion head and ring gear, form pumping cavity 10 and oil sucting cavity 11.Shaft end seal is designed to mechanical seal.

Claims

1. circular-arc gear pump, it is characterized in that: this circular-arc gear pump comprises pump cover, small gear, the pump housing, ring gear, sealing, driving shaft, driven shaft, rolling bearing, pumping cavity, oil sucting cavity, gear adopts segment double circular arc gear, Connecting format is parabolic, ring gear and small gear are intermeshing, are contained in the pump housing.

2. circular-arc gear pump according to claim 1, it is characterized in that: the small gear number of teeth is 11, and the ring gear number of teeth is 13, and the driving flank of tooth of small gear and the tooth of ring gear are combined closely.

3. circular-arc gear pump according to claim 1, it is characterized in that: shaft end seal is designed to mechanical seal.