CN2750077Y

CN2750077Y - Melting pump

Info

Publication number: CN2750077Y
Application number: CNU2004201159873U
Authority: CN
Inventors: 王庆锋; 张克锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-01
Filing date: 2004-12-01
Publication date: 2006-01-04
Anticipated expiration: 2014-12-01

Abstract

The utility model relates to a melting pump, particularly a centrifugal pump having an auxiliary impeller. The utility model comprises a pump casing 7, a pump cover 9, an impeller 5, the auxiliary impeller 6, the work fluid cavity body 8 of the auxiliary impeller, a packing seal assembly 12, a shaft coupling and a bearing bracket 10. The utility model is characterized in that the pump cover 9 is provided with bolt holes 93, the bearing bracket 10 has through holes 101 and the pump cover 9 and the bearing bracket 10 are movably connected through screws 11 or screw bolts 11. The cross section of a connecting part between the pump cover 9 and the work fluid cavity body 8 of the auxiliary impeller has a circumferential groove 91, and the convex end 81 of the work fluid cavity body 8 of the auxiliary impeller can be clamped into the groove 91 to position the work fluid cavity body 8 of the auxiliary impeller. The circumferential outer wall of the pump cover 9 has screw holes 92 leading to the groove 91, and screws 19 are penetrated through the screw holes 92 to fix the work fluid cavity body 8 of the auxiliary impeller and the pump cover 9. The utility model has the advantages that the structures can be intuitively measured during the course of assembly, and thus, the assembling success rate is high. The leakage is few. Cooling water is prevented from contacting packing, and thus, the normal and safe production can be assured.

Description

Melting pump

Technical field

The utility model Melting pump relates generally to a kind of centrifugal pump with sub-propeller.

Background technique

In present urea production process, the structural type that the urea melting pump is commonly used at present is: see shown in Figure 1, fit between pump cover 9, bearing bracket 10, sub-propeller working solution cavity 8 and the pump case 7 is by the processing location between pump bearing carriage 10 and the pump case 7, pump cover 9, sub-propeller working solution cavity 8 sink in the groove that pump case 7 shapes, and pump case 7, pump bearing carriage 10, pump cover 9 and sub-propeller working solution cavity 8 can not be as integral body assemblings; The sealing of running sealing, sub-propeller 6 and the sub-propeller working solution cavity 8 of impeller 5 and pump case 7 inlets guarantees by the original machining accuracy of impeller 5, pump case 7, sub-propeller 6 and sub-propeller working solution cavity 8 fully; Melting pump filler chamber packing seal structure 12 adopts the seal cage water quench, and water directly contacts with filler, axle; There are following several point defects in the Melting pump of this structure: (1) pump case 7, pump bearing carriage 10, pump cover 9 and sub-propeller working solution cavity 8 can not be as integral body assemblings; Gap between impeller 5 and the sub-propeller working solution cavity 8, the gap between sub-propeller 6 and sub-propeller working solution cavity 8, the pump cover 9 can not be measured in assembly process intuitively; Assembly yield is relatively poor, expends time in, and can not guarantee the quality of overhauling; (2) Melting pump does not have impeller ring and wear ring, no sub-propeller seal ring and wear ring, because sluicing abrasion in the pump operation process, matching gap between pump case 7 and impeller 5, sub-propeller 6 and the pump cover 9 is increased, cause the working efficiency of pump to reduce, leak increase; (3) the Melting pump operating temperature generally is higher than normal temperature more than 50 ℃, because pump case bearing 71 foundation slabs direct and pump link, pump case 7 and pump case bearing 71 expanded by heating, generally can cause the coupling coaxality of pump and motor to change, the vibration of pump will strengthen like this, and then the life-span of parts such as pump bearing, coupling is reduced; (4) because pump structure is the centrifugal pump that has sub-propeller, generally filler chamber is micro-vacuum state by pump side in the pump operation process, adopt seal cage to encrypt under the situation of water shutoff cooling in the cooling of the filler of pump and very easily cause moisture to enter in the pump case, and then cause that moisture content of finished products increases with quality of product and descend.

Summary of the invention

The purpose of this utility model provides a kind of novel Melting pump, and it has overcome above-described defective, the assembling accurately and reliably, the success rate height, save time; Reveal and lack, the efficient height, proper functioning is long service cycle; The shaft packing chamber does not intake, and guarantees the safe transport of raw material.

The technological scheme of the utility model Melting pump is: comprise by pump cover 9, impeller 5, sub-propeller 6, the sub-propeller working solution cavity 8 of the pump case 7 that has insulation jacket, carrying vapour chuck insulating structure and filler cooling water jecket structure, have but filler chamber's packing seal structure 12 of structure of Forced water cooling, bearing bracket 10, it is characterized in that screw 93 is arranged on pump cover 9, through hole 101 is arranged on bearing bracket 10, pump cover 9, bearing bracket 10 are by screw or bolt 11 removable connections, so structure is linked together pump cover 9 and bearing bracket 10; On pump cover 9, with on the transverse section that sub-propeller working solution cavity 8 connects circumferential recess 91 is arranged, the nose 81 of sub-propeller working solution cavity 8 can snap in groove 91, carry out spacing to sub-propeller working solution cavity 8, on the peripheral outer wall of pump cover 9, there is screw 92 to lead to groove 91, screw 19 passes screw 92, fixed joint impeller working solution cavity 8 and pump cover 9.

Above-mentioned Melting pump, pump cover 9, bearing bracket 10 are along several screws 93, through hole 101 are upwards arranged in week.

Above-mentioned Melting pump is equipped with impeller ring 4 and wear ring 3 between impeller 5 and pump case 7, sub-propeller seal ring 1 and wear ring 2 are housed between sub-propeller 6 and pump cover 9.

Above-mentioned Melting pump, packing seal structure 12 are stuffing box formula water cooling chuck seal case.

Above-mentioned Melting pump, the packing seal casing 121 that has circumferential groove 120 is arranged between pump cover 9 and Gland 13, water intake 123 and water outlet 122 are arranged on the packing seal casing 121, water intake 123 communicates with circumferential groove 120 with water outlet 122, packing seal casing 121 cooperates with pump cover 9, make circumferential groove 120 form a sealed cavity, on the packing seal casing 121 through hole is arranged, can be fixed on the pump cover 9 by screw.

Above-mentioned Melting pump has circumferential O RunddichtringO between packing seal casing 121 and pump cover 9.

Since adopted above structure, impeller and pump case, sub-propeller work sap cavity wallboard gap, and the gap between sub-propeller and sub-propeller work sap cavity wallboard, the pump cover can be measured in assembly process intuitively; The assembly yield height is saved time; Reveal and lack the efficient height; The pump shaft envelope adopts the packing box seal casing, the contact of cooling water discord filler, the safe transport of assurance raw material.

Description of drawings

Fig. 1 is urea melting pump sectional arrangement drawing commonly used.

Fig. 2 is the utility model Melting pump sectional arrangement drawing.

Fig. 3 is that Melting pump assembling-impeller abrasion-proof ring shown in Figure 2 and impeller ring cooperate partial enlarged drawing.

Fig. 4 is Melting pump assembling-pump case shown in Figure 2, sub-propeller working solution cavity, pump cover, pump bearing carriage cooperation partial enlarged drawing.

Fig. 5 is the packing seal structure partial enlarged drawing of Melting pump assembling-band water cooling chuck shown in Figure 2.

Fig. 6 is that Melting pump assembling-sub-propeller seal ring shown in Figure 2 and wear ring cooperate partial enlarged drawing.

Fig. 7 is an A-A view shown in Figure 5.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

The technological scheme of the utility model Melting pump is: see shown in Figure 2, comprise by pump cover 9, impeller 5, sub-propeller 6, the sub-propeller working solution cavity 8 of the pump case 7 that has insulation jacket, carrying vapour chuck insulating structure and filler cooling water jecket structure, have but filler chamber's packing seal assembly 12 of structure of Forced water cooling, bearing bracket 10; Screw 93 is arranged on pump cover 9, through hole 101 is arranged on bearing bracket 10, pump cover 9, bearing bracket 10 are by screw or bolt 11 removable connections; On pump cover 9, with on the transverse section that sub-propeller working solution cavity 8 connects circumferential recess 91 is arranged, the nose 81 of sub-propeller working solution cavity 8 can snap in groove 91, carry out spacing to sub-propeller working solution cavity 8, have screw 92 to lead to groove 91 on the peripheral outer wall of pump cover 9, see shown in Figure 4ly, screw 19 passes screw 92, thereby can fixed joint impeller working solution cavity 8 with pump cover 9, it is become one.Adopt this kind structure, at first can cooperate the back to be assembled into an integral body by machining gap Melting pump bearing bracket 10 and pump cover 9 with bolt or screw 11 connections, see shown in Figure 4ly, load onto sub-propeller 6 back at the pump end and firmly can measure gap between sub-propeller 6 and the pump cover 9 toward motor side push-tight sub-propeller 6; Load onto then in the groove 91 that sub-propeller working solution cavity 8 tightly is pressed into pump cover 9, four Cock screws 19 are also promptly arranged on the peripheral outer wall of pump cover 9, make pump cover 9 as a whole with 8 one-tenth of sub-propeller working solution cavitys in the groove outer rim; Can measure gap between sub-propeller 6 and the sub-propeller working solution cavity 8 easily at pump side; Load onto impeller 5 at last, tighten impeller nut 17, can measure the gap between impeller 5 and the sub-propeller working solution cavity 8, see shown in Figure 2.Like this, matching gap can guarantee the coaxality of each processing component, and the parts of compositions such as pump bearing carriage 10, pump cover 9, sub-propeller working solution cavity 8 can become as a whole the mounting or dismounting.Certainly, can fix with screw or bolt 11 at pump cover 9, bearing bracket 10 along several screws 93, through hole 101 are upwards arranged in week.

Further form can be equipped with impeller ring 4 and wear ring 3 between impeller 5 and pump case 7, and sub-propeller seal ring 1 and wear ring 2 are housed between sub-propeller 6 and pump cover 9, sees Fig. 2, Fig. 3, shown in Figure 6.

The packing seal assembly 12 of the utility model Melting pump is a stuffing box formula water cooling chuck sealing configuration.See Fig. 2, Fig. 5, shown in Figure 7, the packing seal casing 121 that has circumferential groove 120 is arranged between pump cover 9 and Gland 13, this packing seal casing 121 cooperates with pump cover 9, make circumferential groove 120 form a sealed cavity, water intake 123 and water outlet 122 are arranged on packing seal casing 121, water intake 123 communicates with circumferential groove 120 with water outlet 122, and so, the sealing cavity has just formed the circulating water chuck; On the packing seal casing 121 through hole is arranged, can be fixed on the pump cover 9 by screw.Like this structure, the water quench stuffing box is taken away axle and the fricative heat of filler and the filler of getting along well, is coupling and touches, and has avoided water to enter and has caused quality of product decline in the pump case.Further form can have circumferential O RunddichtringO 26, sealing gasket 25 between packing seal casing 121 and pump cover 9, is sealed better.

Adopt the utility model Melting pump, when assembling, can adopt following steps: the assembling of first step pump cover 9; See shown in Figure 5ly, at first,, load onto Gland 13, then, sealing gasket 25 and O-ring seals 26 are contained on the sealing surface of packing seal casing correspondence the filler 34 packing seal assembly 12 of packing into, last, the packing seal assembly 12 that assembles is packed in the pump cover 9.The assembling of the second step sub-propeller working solution cavity 8; See shown in Figure 6ly, at first, key 23 and axle sleeve 21 are installed on the pump shaft 24, sub-propeller wear ring 2 is pressed into pump cover 9, then sealing gasket 22 is installed in the deep gouge of pump shaft cover 21, last, sub-propeller seal ring 1 is pressed into is assembled on the sub-propeller 6.The assembling of the 3rd step pump cover 9, sub-propeller working solution cavity 8, pump bearing carriage 10; See shown in Figure 2, at first, the pump cover 9 that assembles in first and second step is assembled on the pump bearing carriage 10, as a whole with bolt 11 then pump cover 9 and 10 connections of pump bearing carriage, then, the sub-propeller 6 that assembles is contained on the axle 24,, pad 16 be encased in the groove 91 of pump cover 9 in, again sub-propeller working solution cavity 8 be pressed in the groove 91 of pump cover 9 thereafter, be screwed in the pump cover 9 with Cock screw 19, fasten sub-propeller working solution cavity 8.The whole assembling of the 4th step pump; See Fig. 2, shown in Figure 3, on the basis in the 3rd step, at first impeller abrasion-proof ring 3 is pressed in the pump case 7, simultaneously impeller ring 4 is pressed on the impeller 5, then, impeller 5, pad 18 and impeller nut 17 are contained on the axle 24 successively, last, pad 15 is encased in the pump case 7, then pump bearing carriage 10 and 20 connections of pump case 7 usefulness bolts is tightened.

Aborning, we are applied in the utility model Melting pump under the following operating mode:

Through using, verified that the utility model Melting pump has assembling accurately, reliably; The pump overall operation is steady, vibration is little; The failure-free operation cycle is long; Easy to operate; The Melting pump high working efficiency; The pump cooling water can not enter advantages such as influencing quality of product in the pump.

Claims

1, a kind of novel melting pump, comprise the pump case (7), carrying vapour chuck insulating structure and the filler cooling water jecket structure that have insulation jacket pump cover (9), impeller (5), sub-propeller (6), sub-propeller working solution cavity (8), have but filler chamber's packing seal structure (12) of structure of Forced water cooling, bearing bracket (10), it is characterized in that axial screw (93) is arranged on the end face of pump cover (9), axial hole (101) is arranged on bearing bracket (10), and pump cover (9), bearing bracket (10) are by the removable connection of screw (11); On pump cover (9), with on the transverse section that sub-propeller working solution cavity (8) is connected circumferential recess (91) is arranged, the nose (81) of sub-propeller working solution cavity (8) can snap in the groove (91), on the peripheral outer wall of pump cover (9), there is screw (92) to lead to groove (91), screw (19) passes screw (92), fixed joint impeller working solution cavity (8) and pump cover (9).

2, Melting pump according to claim 1 is characterized in that pump cover (9), bearing bracket (10) are along several screws (93), through hole (101) are upwards arranged in week.

3, Melting pump according to claim 1 is characterized in that impeller ring (4) and wear ring (3) are housed between impeller (5) and pump case (7), and sub-propeller seal ring (1) and wear ring (2) are housed between sub-propeller (6) and pump cover (9).

4,, it is characterized in that packing seal structure (12) is stuffing box formula water cooling chuck seal case according to claim 1 or 2 or 3 described Melting pumps.

5, Melting pump according to claim 4, it is characterized in that the packing seal casing (121) that has circumferential groove (120) is arranged between pump cover (9) and Gland (13), water intake (123) and water outlet (122) are arranged on the packing seal casing (121), and water intake (123) communicates with circumferential groove (120) with water outlet (122); Packing seal casing (121) cooperates with pump cover (9), makes circumferential groove (120) form a sealed cavity; The packing seal casing has through hole on (121), can be fixed on the pump cover (9) by screw.

6, Melting pump according to claim 5 is characterized in that between packing seal casing (121) and pump cover (9) circumferential O RunddichtringO being arranged.