CN101408170A

CN101408170A - Mechanical seal gear pump

Info

Publication number: CN101408170A
Application number: CNA2007100469828A
Authority: CN
Inventors: 胡涛; 胡侃; 黄姚林; 周游
Original assignee: SHANGHAI HEYNEW PUMP INDUSTRY Co Ltd
Current assignee: SHANGHAI HEYNEW PUMP INDUSTRY Co Ltd
Priority date: 2007-10-12
Filing date: 2007-10-12
Publication date: 2009-04-15

Abstract

The invention relates to technical field of a gear pump, in particular to a mechanical sealing gear pump, comprising a rear shell, a middle shell, a front shell, gears, a bearing, an active shaft and a driven shaft. The gear pump is characterized in that shell bodies at the front and the rear sides of the middle shell 5 are respectively provided with an inlet and an outlet; the shaft hole of an active gear 11 is sheathed on the active shaft 10 in the cavity body of the middle shell 5; the shaft hole of a driven gear 11' is sheathed on the driven shaft 10' in the cavity body of the middle shell 5; and the active gear 11 is mutually meshed with the driven gear 11'. Compared with the prior art, the gear pump has the advantages of simple structure, light weight, small volume, good self-absorbing performance, reliable operation and easy maintenance, and uses the fixing gaps of gears for accurately measuring the medium flow, thus avoiding pulse.

Description

Mechanical seal gear pump

[technical field]

The present invention relates to the gear pump technical field, specifically a kind of mechanical seal gear pump.

[background technique]

Gear pump in the market adopts pulse to come the interior fluid flow of metering pump mostly, and join pulsed damper reduce to be measured medium acceleration and reduce loss of pressure head, make to produce and approach flowing of laminar flow, but pulsed damper can not be eliminated pulse fully.

[summary of the invention]

Purpose of the present invention overcomes the deficiencies in the prior art exactly, determines the flow of metering pump by the precise gaps between driving gear and the driven gear.

For achieving the above object, the sealing gear pump designs a mechanism, comprise back cover, mesochite, fore shell, gear, bearing, it is characterized in that: fore shell 9 connects mesochite 5 right-hand members, mesochite 5 left ends with bolt connection back cover 1 with bolt, both sides, mesochite 5 front and back are made as import and outlet respectively, cavity in the mesochite 5 is that driving gear 11 intersects the shape that forms with driven gear 11 ', driving gear 11 is installed on the driving shaft 10 in mesochite 5 cavitys, driven shaft 10 ' in mesochite 5 cavitys is gone up driven gear 11 ' is installed, and driving gear 11 is meshing with each other with driven gear 11 '.Be equipped with two jump ring grooves on driving shaft 10 in described mesochite 5 cavitys and the driven shaft 10 ', be provided with a keyway radially between the jump ring groove on two, jump ring 12, fitting key 13 in the keyway are installed in the jump ring groove.Be set with on the driving shaft of described back cover 1 and mesochite 5 connecting parts and the bearing 2 of driven shaft that a sheathed housing O encircles 4 on the bearing 2 of 3, two wear plates of a wear plate 3 and mesochite 5 connecting parts.On the driving shaft of described fore shell 9 and mesochite 5 connecting parts and the bearing of driven shaft a wear plate 7 is installed respectively, wear plate 7 is provided with a housing O ring 6 with mesochite 5 connecting parts.

The present invention compares with prior art, and is simple in structure, in light weight, volume is little, self-priming performance good, reliable operation, easy to maintenance, with gear fixed interval (FI) accurate measurement rate-of flow, has avoided pulse.

[description of drawings]

Fig. 1 is a decomposing schematic representation of the present invention.

Appointment Fig. 1 is a Figure of abstract.

Referring to accompanying drawing 1,1 is back cover; 2 is bearing; 3 is wear plate; 4 are housing O ring; 5 is mesochite; 6 are housing O ring; 7 is wear plate; 8 is bearing, is equipped with bearing on driving shaft and the driven shaft; 9 is fore shell; 10 is driving shaft; 11 is driving gear; 10 ' is driven shaft; 11 ' is driven gear; 12 is jump ring; 13 is key.

[embodiment]

The invention will be further described below in conjunction with accompanying drawing.

On the driving shaft 10 in mesochite 5 He on the driven shaft 10 ' processing precise is installed respectively, driving gear 11 and driven gear 11 ' that the engagement degree is complete, and fix driving gear 11 and driven gear 11 ' by driving shaft 10 that is equipped with two jump rings and a key and driven shaft 10 ', and by the housing O of mesochite 5 rear and front ends ring 4,6 and wear plate 3,7 guarantee sealing and prevent wearing and tearing, be equipped with two annular spring grooves on driving shaft 10 in mesochite 5 cavitys and the driven shaft 10 ', be provided with a keyway radially between two jump ring grooves, jump ring 12 is enclosed within the jump ring groove, key 13 embeds in the keyway, play the purpose of fixed gear, when driving shaft 10 rotates, the bearing that drives on the driving shaft 10 rotates, bearing drives driving gear 11 again and rotates, driving gear 11 drives driven gear 11 ' and rotates, each driving gear is rotated by driven by motor, the driven gear that is engaged with also rotates, when two teeth separate gradually, produce the gap, the volume of working space is increased gradually, form partial vacuum, liquid is under atmospheric effect, suck through the front end water intake of suction pipe from mesochite 5, the liquid that sucks is released the rear end water outlet of mesochite 5 by the gear extruding along pump housing inwall, work as the master, driven gear constantly rotates, pump just constantly sucks and drain, realize that pump reaches the purpose of fed sheet of a media, again owing to the gap between gear is fixed, just the purpose of calculation medium flow be can reach by clearance space, and the validity of measuring and the loss of having avoided pulse to produce guaranteed by the machining accuracy of gear.

Be applicable to that conveying does not contain solid particle and fiber, non-corrosiveness, temperature is not higher than 80 ℃, and viscosity is the lubricant oil of 5-1500cst or other liquid of similar lubricant oil, is mainly used in industries such as iron and steel, oil, petrochemical industry, metallurgy, chemical fibre, machinery, glass, pharmacy.

Claims

1, a kind of mechanical seal gear pump, comprise back cover, mesochite, fore shell, gear, bearing, driving shaft, driven shaft, it is characterized in that: fore shell (9) connects back cover (1) with bolt connection mesochite (5) right-hand member, mesochite (5) left end with bolt, be respectively equipped with import and outlet on the housing of both sides before and after the mesochite (5), the driving shaft (10) of the shaft hole sleeve of driving gear (11) in mesochite (5) cavity, on the driven shaft (10 ') of the shaft hole sleeve of driven gear (11 ') in mesochite (5) cavity, driving gear (11) is meshing with each other with driven gear (11 ').

2, a kind of mechanical seal gear pump as claimed in claim 1, it is characterized in that: be equipped with two annular spring grooves on driving shaft (10) in described mesochite (5) cavity and the driven shaft (10 '), be provided with a keyway radially between two jump ring grooves, jump ring (12) is enclosed within the jump ring groove, and key (13) embeds in the keyway.

3, a kind of mechanical seal gear pump as claimed in claim 1, it is characterized in that: be set with a wear plate (3) on the driving shaft of described back cover (1) and mesochite (5) connecting part and the bearing (2) of driven shaft, wear plate (3) is gone up sheathed housing O ring (4) with mesochite (5) connecting part bearing (2).

4, a kind of mechanical seal gear pump as claimed in claim 1, it is characterized in that: a difference sheathed wear plate (7) on the driving shaft of described fore shell (9) and mesochite (5) connecting part and the bearing of driven shaft is arranged with a housing O ring (6) on the bearing of wear plate (7) and mesochite (5) connecting part.