CN203394756U

CN203394756U - Novel gear pump

Info

Publication number: CN203394756U
Application number: CN201320253209.XU
Authority: CN
Inventors: 张志雄; 王相白
Original assignee: Ningbo Dahongying University
Current assignee: Ningbo Dahongying University
Priority date: 2013-04-22
Filing date: 2013-04-22
Publication date: 2014-01-15
Anticipated expiration: 2023-04-22

Abstract

The utility model discloses a novel gear pump. An internal thread suction port and an external thread discharge port are formed in two outer sides of a pump body; a dynamic sealing disk is arranged among a master metallurgical gear, a slave alloy gear and a front outer end cover; a circular ring of a ring spoke master spring is fixed at a dynamic disk master concave ring on the back surface of the dynamic sealing disk; a spoke of the ring spoke master spring is pressed against the inner side surface of the front outer end cover; a circular ring of a ring spoke slave spring is fixed at a dynamic disk slave concave ring on the back surface of the dynamic sealing disk; a spoke of the ring spoke slave spring is pressed against the inner side surface of the front outer end cover; an outer sealing ring is arranged in a dynamic disk outer groove at the dynamic disk outer edge of the dynamic sealing disk; a dynamic disk master hole and a dynamic disk slave hole are formed in the dynamic sealing disk; an inner sealing ring is arranged in each of dynamic disk hole grooves, of the same size, on the dynamic disk master hole and the dynamic disk slave hole; a static sealing disk is arranged among the master metallurgical gear, the slave alloy gear and a rear outer end cover; the master metallurgical gear and the slave alloy gear are made of two different materials; the dynamic sealing disk and the static sealing disk are respectively made of a composite material formed by a Fe/Al inter-metallic compound and Al2O3.

Description

A kind of gear pump

Technical field

The utility model relates to a kind of transformation of energy rotary volume pump that mechanical energy is converted to fluid pressure energy, refers to especially a kind of gear pump.

Background technique

Rotary volume pump has advantages of that efficiency is high, but after all there are long-time running wearing and tearing, its efficiency obviously reduces, and causes the main cause of above-mentioned defect to be that the end face activity isolation between hyperbaric chamber and low-pressure cavity could not play the effect of effective sealing.The all conditions that is difficult in engineering find a kind of material can meet specific operation has good cost performance simultaneously, and therefore people often adopt the way of various cover coats to solve this problem in the past; The binding ability that namely makes full use of two or more materials realizes, or is realized and compared with low body material, replaced high price material to reduce costs by price by certain surface Hardening Treatment.The too hard easily fracture of material, cross and softly cannot process high-precision surface, the undersized easy heat expansion of end face fit tolerance is stuck firmly, end face fit tolerance is oversize can not effective sealing, and after long-time running wearing and tearing, sealing effect is poorer, the production line of having to stop is changed pumping unit, causes very large direct or indirect loss.

Summary of the invention

To achieve these goals, the utility model provides following technological scheme:

, internal thread suction port and outside thread exhaust port are positioned at the pump housing two outsides; The both ends of the surface of the described pump housing are mutually vertical with two semicircle orifices, be stamped respectively front outer end cap and rear outer end cap, and have end cap screw fastening in both ends of the surface; The protecgulum active axis hole of described front outer end cap and the bonnet active axis hole of rear outer end cap and driving shaft are on same axis; The driven axis hole of protecgulum of described front outer end cap and the driven axis hole of bonnet of rear outer end cap and driven shaft are on same axis; Material is the main metallurgical gear of ferrous alloy and driving shaft secure fit between described front outer end cap and described rear outer end cap; Material be Nb (niobium) microalloy from alloy gear and driven shaft secure fit described between outer end cap and described rear outer end cap; Described main metallurgical gear and described intermeshing from alloy gear; Described main metallurgical gear and described from alloy gear and described to have material between outer end cap be Fe/Al intermetallic compounds and Al ₂o ₃pottery forms the motive sealing dish of composite material; Described main metallurgical gear and described from alloy gear and described to have material between outer end cap be Fe/Al intermetallic compounds and Al ₂o ₃pottery forms the static seal dish of composite material, it is characterized in that: the main scrobicular ring of the Moving plate place at the motive sealing dish back side is fixed wtih the annulus of ring spoke main spring, and the spoke of ring spoke main spring is pressed against the inboard face of front outer end cap; The Moving plate at the motive sealing dish back side is fixed wtih ring spoke from the annulus of spring from scrobicular ring, the inboard face of ring spoke outer end cap from the spoke of spring is pressed against; In the Moving plate outer rim of described motive sealing dish, have Moving plate water jacket filling an outer seal ring, described motive sealing dish has Moving plate main aperture and Moving plate from hole, and described Moving plate main aperture and Moving plate have respectively measure-alike Moving plate hole slot filling an inner seal ring from hole; In the quiet dish outer rim of described static seal dish, have quiet dish water jacket filling an outer seal ring, described static seal dish has quiet dish main aperture He Jingpancong hole, on described quiet dish main aperture He Jingpancong hole, has respectively measure-alike quiet dish hole slot filling an inner seal ring; Described motive sealing dish has Moving plate main aperture and protecgulum active axis hole and bonnet active axis hole on same axis; Described motive sealing dish have Moving plate from hole and the driven axis hole of protecgulum and the driven axis hole of bonnet in same axis; The Moving plate outer rim of described motive sealing dish is slidably matched with two semicircle orifices; Described Moving plate main aperture and described Moving plate are from there being the spacing of 50 to 60 millimeters between hole; Described static seal dish has quiet dish main aperture and protecgulum active axis hole and bonnet active axis hole on same axis; Described static seal dish You Jingpancong hole and the driven axis hole of protecgulum and the driven axis hole of bonnet are on same axis; The quiet dish outer rim of described static seal dish is slidably matched with two semicircle orifices; Between described quiet dish main aperture and described Jing Pancong hole, there is the spacing of 50 to 60 millimeters; Described driving shaft and protecgulum initiatively axis hole and bonnet initiatively between axis hole for being slidably matched; Between the driven axis hole of described driven shaft and protecgulum and the driven axis hole of bonnet for being slidably matched; Described Moving plate main aperture and driving shaft Spielpassung; Described Moving plate is from hole and driven shaft Spielpassung; Described quiet dish main aperture and driving shaft Spielpassung; Described Jing Pancong hole and driven shaft Spielpassung.

The beneficial effects of the utility model are:

Common the produced axial rebounding force of inboard face by means of the spoke of ring spoke main spring and ring spoke outer end cap from the spoke of spring is pressed against respectively, make the horizontal frontal plane of composite material compensating disc be close to main metallurgical gear and from a side plane of alloy gear, force main metallurgical gear and from the opposite side Transverse plane of alloy gear, be close to the inner side plane of static seal dish, form axial end wear compensation gap control technology, guarantee that gear pump is all the time in high-efficiency operation.

Accompanying drawing explanation

Fig. 1 is that the utility model is whole by the sectional drawing of two main axiss.

Fig. 2 is the back side stereogram of the motive sealing dish 40 in Fig. 1.

Fig. 3 is the P～P sectional view in Fig. 1.

Fig. 4 is the sectional view in Q～Q cross section in Fig. 1.

Fig. 5 is the stereogram of the static seal dish 50 in Fig. 1.

Fig. 6 is R～R echelon sectional view in Fig. 4.

Embodiment

In conjunction with the accompanying drawings and embodiments, further structure of the present utility model and working principle are elaborated:

In Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, a kind of gear pump, internal thread suction port 86 and outside thread exhaust port 84 are positioned at 80 liang of outsides of the pump housing; The both ends of the surface of the described pump housing 80 are mutually vertical with two semicircle orifices 85, be stamped respectively front outer end cap 60 and rear outer end cap 90, and have end cap screw 70 fastening in both ends of the surface; The protecgulum active axis hole 61 of described front outer end cap 60 and the bonnet active axis hole 91 of rear outer end cap 90 and driving shaft 11 are on same axis; The driven axis hole 62 of protecgulum of described front outer end cap 60 and the driven axis hole 92 of bonnet of rear outer end cap 90 and the driven shaft 12 main metallurgical gear 45 that material is ferrous alloy on same axis and driving shaft 11 secure fit are between described front outer end cap 60 and described rear outer end cap 90; Material be Nb niobium micro-alloy from alloy gear 54 and driven shaft 12 secure fit described between outer end cap 60 and described rear outer end cap 90; Described main metallurgical gear 45 is with described intermeshing from alloy gear 54; Described main metallurgical gear 45 and described from alloy gear 54 and described to have material between outer end cap 60 be Fe/Al intermetallic compounds and Al ₂o ₃pottery forms the motive sealing dish 40 of composite material; Described main metallurgical gear 45 and described from alloy gear 54 and described to have material between outer end cap 90 be Fe/Al intermetallic compounds and Al ₂o ₃pottery forms the static seal dish 50 of composite material, it is characterized in that: the main scrobicular ring of Moving plate 41 places at the described motive sealing Pan40 back side are fixed wtih the annulus of ring spoke main spring 31, and the spoke of ring spoke main spring 31 is pressed against the inboard face of front outer end cap 60; The Moving plate at the motive sealing Pan40 back side is fixed wtih ring spoke from the annulus of spring 32 from scrobicular ring 42, the inboard face of ring spoke outer end cap 60 from the spoke of spring 32 is pressed against; In the Moving plate outer rim 48 of described motive sealing dish 40, there is Moving plate water jacket 47 filling an outer seal ring 78, described motive sealing dish 40 has Moving plate main aperture 41 and Moving plate from hole 42, and described Moving plate main aperture 41 and Moving plate have respectively measure-alike Moving plate hole slot 44 filling an inner seal ring 74 from hole 42; In the quiet dish outer rim 58 of described static seal dish 50, there is quiet dish water jacket 57 filling an outer seal ring 78, described static seal dish 50 has quiet dish main aperture 51 He Jingpancong holes 52, on described quiet dish main aperture 51 He Jingpancong holes 52, has respectively measure-alike quiet dish hole slot 55 filling an inner seal ring 74; Described motive sealing dish 40 has Moving plate main aperture 41 and protecgulum active axis hole 61 and bonnet active axis hole 91 on same axis; Described motive sealing dish 40 have Moving plate from hole 42 with the driven axis hole 62 of protecgulum and the driven axis hole 92 of bonnet in same axis; The Moving plate outer rim 48 of described motive sealing dish 40 is slidably matched with two semicircle orifices 85; Described Moving plate main aperture 41 and described Moving plate are from there being the spacing of 50 to 60 millimeters between hole 42; Described static seal dish 50 has quiet dish main aperture 51 and protecgulum active axis hole 61 and bonnet active axis hole 91 on same axis; Described static seal dish 50 You Jingpancong holes 52 and the driven axis hole 62 of protecgulum and the driven axis hole 92 of bonnet are on same axis; The quiet dish outer rim 58 of described static seal dish 50 is slidably matched with two semicircle orifices 85; Between described quiet dish main aperture 51 and described Jing Pancong hole 52, there is the spacing of 50 to 60 millimeters; Described driving shaft 11 and protecgulum initiatively axis hole 61 and bonnet initiatively between axis hole 91 for being slidably matched; Between the driven axis hole 62 of described driven shaft 12 and protecgulum and the driven axis hole 92 of bonnet for being slidably matched; Described Moving plate main aperture 41 and driving shaft 11 Spielpassung; Described Moving plate from hole 42 with driven shaft 12 Spielpassung; Described quiet dish main aperture 51 and driving shaft 11 Spielpassung; Described Jing Pancong hole 52 and driven shaft 12 Spielpassung.

Provide a most preferred embodiment of the present utility model below:

The composition of the ferrous alloy of main metallurgical gear 45 by weight percentage (wt%) is; Sintered-aluminium power 18%, nickel-molybdenum alloy powder 21%, cobalt-based alloy powder 2.5%, silicon carbide 1.5%, oiling agent 1.5%, all the other are fe-based alloy powder; From the composition of the Nb niobium micro-alloy of alloy gear 54 by weight percentage (wt%) be; NbCl40.07, plumbago 0.8%, zine stearate 1.7%, all the other are iron powder.

Motive sealing dish 40 and static seal dish 50 all adopt Fe/Al intermetallic compounds and Al ₂o ₃pottery forms composite material, and each constituent element by weight percentage (wt%) is; Al ₂o ₃78%, Fe/Al intermetallic compounds 32%; Described Fe/Al intermetallic compounds self weight percentages of components (wt%) is: Al (aluminium) 18.2,, Mo (molybdenum) 0.3, Ni (nickel) 1.4,, Co (cobalt) 0.4,, WC (Tungsten carbite) 0.6, all the other are Fe (iron); Described inner seal ring 74 materials are chloroprene rubber composition, and the composition of this chloroprene rubber composition by weight percentage (wt%) is; Neoprene 84, acrylate rubber 12, benzimidazole age resister 2.6, butyl aminodithioformic acid nickel 2.3, carbodiimides 2.2, paraffin 3.3, Active agent 3.3, stearic acid 1.4, reinforcing agent 7.7, plasticizing agent 3.7, vulcanzing agent 1.6 and assistant crosslinking agent 4.3.

The proportioning of Fe～Al base-material (wt%): the Al=18.2 that is weight percentage, Fe=81.8, W=1.0.The proportioning of composite material is weight percentage (wt%): Fe～Al base-material 14, Al ₂o ₃(aluminium oxide) fine powder 86; First in the accurate weighing of ratio of Fe～Al base-material, use high speed ball mill ball milling 20 hours, obtain Fe～Al intermetallic compound base material; Ratio batching in composite material, adds anhydrous alcohol ball milling 2 hours, and slurry is dry, powder process in vacuum drying oven; Powder packs in black lead mould, sintering in gas-protecting sintering stove, and shielding gas is H2,1360 ℃ of firing temperatures, pressure 30MPa, heat-insulation pressure keeping 15 minutes.Make alumina base Fe～Al Intermetallics Ceramics Composites.After fine finishing, the inner side plane of the horizontal frontal plane of motive sealing dish and static seal dish between 0.0002 to 0.0004 millimeter, realizes super mirror surface through precision grinding rear surface roughness, guarantees that operation steady in a long-term is without wear-out failure.

Installation steps are as follows:

In Fig. 1, it is 17 numbers of teeth that embodiment selects main metallurgical gear 45, from alloy gear 54, is also 17 numbers of teeth.End cap screw 70 numbers of each side of the pump housing 80 are 6.On a side end face of the pump housing 80, place gasket seal, with 6 end cap screws 70, rear outer end cap 90 is fixed on a side end face of the pump housing 80.In the groove of bonnet active axis hole 91, put into driving shaft seal ring 21; In the groove of the driven axis hole 92 of bonnet, put into driven shaft seal ring 22.On motive sealing dish 40 and static seal dish 50, install in advance outer seal ring 78 and inner seal ring 74.In the groove of protecgulum active axis hole 61 and in the groove of the driven axis hole 62 of protecgulum, put into respectively driving shaft seal ring 21 and driven shaft seal ring 22.

Static seal dish 50 is put into the pump housing 80, allow the outer side plane of static seal dish 50 paste rear outer end cap 90 inner side plane.By the static driving shaft 11 appropriate location that is fixed on of main metallurgical gear 45; Will be from the static driven shaft 12 appropriate location that is fixed on of alloy gear 54.The shaft rear end of driving shaft 11 being passed through to Moving plate main aperture 41 inserts in bonnet active axis hole 91 again; The shaft rear end of driven shaft 12 passed through Moving plate and inserted the driven axis hole 92 of bonnet from hole 42, main metallurgical gear 45 with from the metallurgical gear 45 of the intermeshing ，Shi of alloy gear 54 winner and the inner side plane of pasting static seal dish 50 from a side end face of alloy gear 54.By the horizontal frontal plane of front-end face composite material compensating disc 40 towards main metallurgical gear 45 with from alloy gear 54, allow Moving plate main aperture 41 be inserted in the axle front end of driving shaft 11, allow Moving plate from hole the 42 axle front ends that are inserted in driven shaft 12, make the metallurgical gear 45 of winner and from the opposite side end face of alloy gear 54, pasting the horizontal frontal plane of front-end face composite material compensating disc 40, Moving plate outer rim 48 is slidably matched with two semicircle orifices 85.The annulus of ring spoke main spring 31 is fixed on to the main scrobicular ring of Moving plate 49 places; Again ring spoke is fixed on to Moving plate from scrobicular ring 46 from the annulus of spring 32.

On the opposite side end face of the pump housing 80, place gasket seal, with 6 end cap screws 70, front outer end cap 60 is fixed on the opposite side end face of the pump housing 80, make the axle front end of driving shaft 11 pass through initiatively axis hole 61 of protecgulum, driving shaft keyway 17 is outside front outer end cap 60; The axle front end of driven shaft 12 passed through the driven axis hole 62 of protecgulum.

As follows during work operation:

In Fig. 5 and Fig. 6, external force, by 17 inputs of driving shaft keyway, by related main metallurgical gear 45 rotations of driving shaft 11, meshes by master and slave alloy gear, order about from 54 opposite spins of alloy gear main metallurgical gear 45 cylindricals and being all slidably matched with two semicircle orifices 85 from alloy gear 54 cylindricals.

Main metallurgical gear 45 and from alloy gear 54 when rotated by adjacent two tooth working spaces, constantly brings liquid working media into adjacent two tooth working spaces from internal thread suction port 86, after rotation semi-circumference, squeezes outside thread exhaust port 84, goes round and begins again.

The main scrobicular ring of Moving plate 49 places are fixed wtih the annulus of ring spoke main spring 31, and the spoke of ring spoke main spring 31 is pressed against the inboard face of front outer end cap 60; Moving plate is fixed wtih ring spoke from the annulus of spring 32 from scrobicular ring 46, the inboard face of ring spoke outer end cap 60 from the spoke of spring 32 is pressed against.Common the produced axial rebounding force of inboard face by means of the spoke of ring spoke main spring 31 and ring spoke outer end cap 60 from the spoke of spring 32 is pressed against respectively, make the horizontal frontal plane of composite material compensating disc 40 be close to main metallurgical gear 45 and from a side plane of alloy gear 54, force main metallurgical gear 45 and from the opposite side Transverse plane of alloy gear 54, be close to the inner side plane of static seal dish 50, form axial end wear compensation gap control technology, Fe/Al intermetallic compounds and Al ₂o ₃form all conditions that composite material friction ferrous alloy and Nb niobium micro-alloy can meet specific operation, guarantee that gear pump is all the time in efficient sealed situation operation.

Claims

1. a gear pump, internal thread suction port (86) and outside thread exhaust port (84) are positioned at the pump housing (80) two outsides; The both ends of the surface of the described pump housing (80) are mutually vertical with two semicircle orifices (85), be stamped respectively front outer end cap (60) and rear outer end cap (90), and have end cap screw (70) fastening in both ends of the surface; The protecgulum active axis hole (61) of described front outer end cap (60) and the bonnet active axis hole (91) of rear outer end cap (90) and driving shaft (11) are on same axis; The driven axis hole of protecgulum (62) of described front outer end cap (60) and the driven axis hole of bonnet (92) of rear outer end cap (90) and driven shaft (12) are on same axis; Material is that the main metallurgical gear (45) of ferrous alloy and driving shaft (11) secure fit are positioned between described front outer end cap (60) and described rear outer end cap (90); Material is being positioned between described outer end cap (60) and described rear outer end cap (90) from alloy gear (54) and driven shaft (12) secure fit of Nb (niobium) microalloy; Described main metallurgical gear (45) is with described intermeshing from alloy gear (54); Described main metallurgical gear (45) and described from alloy gear (54) and described to have material between outer end cap (60) be Fe/Al intermetallic compounds and Al ₂o ₃pottery forms the motive sealing dish (40) of composite material; Described main metallurgical gear (45) and described from alloy gear (54) and described to have material between outer end cap (90) be Fe/Al intermetallic compounds and Al ₂o ₃pottery forms the static seal dish (50) of composite material, it is characterized in that: the main scrobicular ring of Moving plate (41) at motive sealing dish (40) back side locates to be fixed wtih the annulus of ring spoke main spring (31), the spoke of ring spoke main spring (31) is pressed against the inboard face of front outer end cap (60); The Moving plate at motive sealing dish (40) back side is fixed wtih ring spoke from the annulus of spring (32) from scrobicular ring (42), the inboard face of ring spoke outer end cap (60) from the spoke of spring (32) is pressed against; In the Moving plate outer rim (48) of described motive sealing dish (40), there is Moving plate water jacket (47) filling an outer seal ring (78), described motive sealing dish (40) has Moving plate main aperture (41) and Moving plate from hole (42), and described Moving plate main aperture (41) and Moving plate have respectively measure-alike Moving plate hole slot (44) filling an inner seal ring (74) from hole (42); In the quiet dish outer rim (58) of described static seal dish (50), there is quiet dish water jacket (57) filling an outer seal ring (78), described static seal dish (50) has quiet dish main aperture (51) He Jingpancong hole (52), has respectively measure-alike quiet dish hole slot (55) filling an inner seal ring (74) on described quiet dish main aperture (51) He Jingpancong hole (52); Described motive sealing dish (40) has Moving plate main aperture (41) and protecgulum active axis hole (61) and bonnet active axis hole (91) on same axis; Described motive sealing dish (40) have Moving plate from hole (42) and the driven axis hole of protecgulum (62) and the driven axis hole of bonnet (92) in same axis; The Moving plate outer rim (48) of described motive sealing dish (40) is slidably matched with two semicircle orifices (85); Described Moving plate main aperture (41) and described Moving plate have the spacing of 50 to 60 millimeters between hole (42); Described static seal dish (50) has quiet dish main aperture (51) and protecgulum active axis hole (61) and bonnet active axis hole (91) on same axis; Described static seal dish (50) You Jingpancong hole (52) and the driven axis hole of protecgulum (62) and the driven axis hole of bonnet (92) are on same axis; The quiet dish outer rim (58) of described static seal dish (50) is slidably matched with two semicircle orifices (85); Between described quiet dish main aperture (51) and described Jing Pancong hole (52), there is the spacing of 50 to 60 millimeters; Described driving shaft (11) and protecgulum initiatively axis hole (61) and bonnet initiatively between axis hole (91) for being slidably matched; Between described driven shaft (12) and the driven axis hole of protecgulum (62) and the driven axis hole of bonnet (92) for being slidably matched; Described Moving plate main aperture (41) and driving shaft (11) Spielpassung; Described Moving plate is (42) and driven shaft (12) Spielpassung from hole; Described quiet dish main aperture (51) and driving shaft (11) Spielpassung; Described Jing Pancong hole (52) and driven shaft (12) Spielpassung.