CN205064284U

CN205064284U - High -pressure single -stage cantilever type centrifugal pump of resistant entry

Info

Publication number: CN205064284U
Application number: CN201520788135.9U
Authority: CN
Inventors: 左传玺; 肖兴均; 马强; 魏红满; 王新成
Original assignee: LIAONING CHANGZHI PUMP Co Ltd
Current assignee: LIAONING CHANGZHI PUMP Co Ltd
Priority date: 2015-09-29
Filing date: 2015-09-29
Publication date: 2016-03-02
Anticipated expiration: 2025-09-29

Abstract

The utility model provides a high -pressure single -stage cantilever type centrifugal pump of resistant entry which it is streamlined that the constitutional features is that pump body outside both wings are, and the cross section of splice bar be T type structure, and radially the cross section of strengthening rib is oblate type structure, the fixed stationary flow grid tray in pump body entrance is personally submitted 45 with the level and is arranged, thereby arrange for this kind to have reduced prewhirling of entry, the anti -cavitation who has improved the pump can, the hole of fixing the nockbush on the pump cover is regular water conservancy inslot pore structure, adopt regular water conservancy inslot pore structure to strengthen the throttle effect, reduced the pressure in sealed chamber. The back shroud of impeller is equipped with the thickening boss that increases impeller strength, and its boss has not only increased the physical strength of back shroud of impeller, and still effective balancing axial thrust has improved the efficiency of pump, reduce the casting degree of difficulty of impeller simultaneously, reduced the fluid to the wearing and tearing of part, improved the life of impeller. Be equipped with the series connection bearing in the tail end bearing body of pump shaft, the series connection bearing is supplementary undertakes partial axial force, the abundant axial force that has balance.

Description

The single-stage cantilever of resistance to inlet high pressure formula centrifugal pump

One, technical field

The utility model relates to mechanical engineering pump class technical field, is a kind of single-stage cantilever of resistance to inlet high pressure formula centrifugal pump specifically.

Two, background technique

Current, China's single-stage cantilever of resistance to inlet high pressure formula centrifugal pump, its pump housing Strengthening Design adopts conventional stiffening rib, causes the profile of pump stiff, unsightly; The ingress current stabilization screen of pump, horizontal by vertical layout, to be prewhirled, improves the poor effect of anti-cavitation performance to reducing entrance; The nockbush endoporus at the impeller place of pump is cylndrical surface unthreaded hole, and this kind of structure restriction effect is poor, and Seal cage pressure is excessive; Impeller is with back of the body choma and equalizing orifice, this kind of structure is unfavorable for the axial force balancing inlet high pressure generation, and due to the back of the body gap, choma place wash away by medium, corrode and denude cause the back of the body choma life-span very short, once be damaged, to make a big impact to pump performance, carry on the back choma different from cover plate intersection thickness simultaneously, easily occur that waste product affects casting yield, easily cracked for high hard material; The single-stage cantilever of resistance to inlet high pressure formula centrifugal pump suction pressure is high, and impeller and pump bearing are by very large axial force, and pump shaft tail end adopts single rack bearing can not offset very large to back pressure.

Three, summary of the invention

In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of life-span that can extend pump component, carries the high performance single-stage cantilever of resistance to inlet high pressure formula centrifugal pump.

The technological scheme realizing the purpose of this utility model employing is: this centrifugal pump is primarily of the pump housing, impeller, pump cover, and pump shaft, bearing support, series connection bearing, current stabilization screen and nockbush are formed; Outside the pump housing, both wings are streamlined, and the transverse section of the connecting tendon of both wings and pump housing joint is T-type structure, and the transverse section of pump housing radial reinforced rib is flat round structure; The current stabilization screen that pump housing ingress is fixed is horizontal by 45 ° of layouts; The endoporus being fixed on the nockbush on pump cover between impeller tail end and pump cover is regular water channel inner hole structure; Back shroud of impeller is provided with the thickening boss increasing impeller intensity; The tail end bearing support of pump shaft is provided with series connection bearing.

The beneficial effects of the utility model are: due to the design of the streamlined both wings of this pump, T-shaped connecting tendon and oblate type stiffening rib, can not only meet pump housing requirement of strength, and make the profile of pump more attractive in appearance; The current stabilization screen of the ingress of pump horizontal by 45 ° of layouts, thus reduces prewhirling of entrance, improves the anti-cavitation performance of pump; Nockbush adopts regular water channel inner hole structure to enhance restriction effect, reduces the pressure of Seal cage; The boss of back shroud of impeller not only adds the physical strength of back shroud of impeller, and also effective balancing axial thrust, improves pump efficiency; Remove impeller back of the body choma can eliminate and produce the wearing and tearing of back of the body choma thus and cause and frequent change the shortcoming short with hydraulic performance decline, life-span, improve high hard material yield rate with lowering and cast difficulty; The series connection bearing that the tail end of pump shaft is provided with, realize front end roller bearing and bear radial force, the separation mode of high thrust backward born by rear end parallel series bearing, bears the forward thrust in possibility situation simultaneously, can not assist completely bear part axial force as thrust-bearing thrust.

Four, accompanying drawing explanation

Fig. 1 is the sectional structure chart of the utility model single-stage cantilever of resistance to inlet high pressure formula centrifugal pump.

Fig. 2 is the utility model single-stage cantilever of resistance to inlet high pressure formula centrifugal pump inlet end elevation.

Fig. 3 is Fig. 2 A-A sectional drawing.

Fig. 4 is Fig. 2 B-B sectional drawing.

Fig. 5 is the partial enlarged drawing at I place in Fig. 1.

In the accompanying drawings: 1. the pump housing, 2. impeller, 3. pump cover, 4. pump shaft, 5. bearing support, 6. connect bearing, 7. current stabilization screen, 8. nockbush, 9. connecting tendon, 10. both wings, 11. stiffening ribs.

Five, embodiment

In the accompanying drawings, the utility model single-stage cantilever of resistance to inlet high pressure formula centrifugal pump is primarily of the pump housing, impeller, pump cover, and pump shaft, bearing support, series connection bearing, current stabilization screen and nockbush are formed; Outside the pump housing 1, both wings 10 are in streamlined, and both wings 10 are T-type structure with the transverse section of the connecting tendon 9 of pump housing joint, and the transverse section of the pump housing 1 radial reinforced rib 11 is flat round structure; The form structure of the pump housing can not only meet pump housing requirement of strength, and makes the profile of pump more attractive in appearance.The current stabilization screen 7 that the pump housing 1 ingress is fixed is horizontal by 45 ° of layouts; This kind is arranged thus is reduced prewhirling of entrance, improves the anti-cavitation performance of pump; The endoporus being fixed on the nockbush 8 on pump cover 3 between impeller 2 tail end and pump cover 3 is regular water channel inner hole structure; Adopt regular water channel inner hole structure to enhance restriction effect, reduce the pressure of Seal cage.Impeller 2 back shroud is provided with the thickening boss increasing impeller intensity; The boss of back shroud of impeller not only adds the physical strength of back shroud of impeller, and also effective balancing axial thrust, improves pump efficiency; Reduce the casting difficulty of impeller simultaneously, reduce fluid to the wearing and tearing of part, improve the working life of impeller.Be provided with series connection bearing 6 in the tail end bearing support 5 of pump shaft 4, series connection bearing is auxiliary bears part axial force, balances axial force fully.

Claims

1. the single-stage cantilever of a resistance to inlet high pressure formula centrifugal pump, this pump is primarily of the pump housing, impeller, pump cover, and pump shaft, bearing support, series connection bearing, current stabilization screen and nockbush are formed; It is characterized in that: the pump housing (1) outside both wings (10) is in streamlined, and both wings (10) are T-type structure with the transverse section of the connecting tendon (9) of pump housing joint, the transverse section of the pump housing (1) radial reinforced rib (11) is flat round structure; The current stabilization screen (7) that the pump housing (1) ingress is fixed is horizontal by 45 ° of layouts; The endoporus being fixed on the nockbush (8) on pump cover (3) between impeller (2) tail end and pump cover (3) is regular water channel inner hole structure; Impeller (2) back shroud is provided with the thickening boss increasing impeller intensity; Series connection bearing (6) is provided with in the tail end bearing support (5) of pump shaft (4).