CN109236746A - A kind of single-stage double-suction middle-opening that anti-seal ring falls off pump - Google Patents

Abstract

The present invention relates to the single-stage double-suction middle-opening pumps that anti-seal ring falls off, it includes that impeller and the pump housing are socketed in the middle part of pump shaft, seal member is provided between the pump housing and impeller, the two sides of the pump housing are provided with pump cover, it is combined with stuffing seal and mechanically-sealing apparatus respectively at the pump cover of two sides, stuffing seal and mechanically-sealing apparatus are cooperated by seal gusset and pump cover and impeller, and seal gusset with the gap of pump cover be 1.53mm, it is concordant when the side cooperated is with pump cover seam allowance with impeller inlet；Seal member includes the impeller ring being arranged on the outside of impeller, and impeller ring and impeller pass through the lock-screw being arranged radially and lock；Casing ring is provided on the outside of impeller ring, casing ring is arranged on the pump housing；The present invention realizes the effect of anti-cavitation by improving seal gusset, while preventing impeller ring from falling off by unique impeller sealing arrangement, ensure that water pump is safely and smoothly run.

Description

A kind of single-stage double-suction middle-opening that anti-seal ring falls off pump

Technical field

The present invention relates to middle-opening pump field, the single-stage double-suction middle-opening that specially anti-seal ring falls off is pumped.

Background technique

Single-stage double-suction middle-opening pump is also referred to as single-stage double-suction middle-opening formula centrifugal pump, and single-stage double-suction middle-opening pumps general action in needs Big flow operating area, flow is big, and lift does not need excessively high recirculated water and water supply application, such as large-scale steel mill's metallurgy row Plumbing, heating, plant drainage, farmland water drainage, air-conditioning system are irrigated in industry (Tang Gang, Anshan iron and steel plant, Mei Gang), steam power plant and power station, city System water supply, mine fire-fighting system water supply, refinery, mine, chemical plant, textile industry, paper mill, oil field, airport construction Etc. all kinds of hydraulic engineerings.Traditional single-stage double-suction middle-opening pump seal body gusset and pump cover, impeller inlet side have between enough overcurrents Gap, but according to model difference, cavitation performance also has biggish difference, some pump original anti-cavitation performance has with regard to fine, but also Pump anti-cavitation performance it is very poor, especially when inclined operating condition operation, pump is easy to happen cavitation.

Meanwhile in traditional design, the positioning method of impeller ring is the mode of junction of the edges of two sheets of paper screw fastened, junction of the edges of two sheets of paper screw Hole needs on the gap that impeller and impeller ring cooperate with making a hole, due to impeller and impeller ring material difference, There is definitely operation difficulty in this drilling；After junction of the edges of two sheets of paper screw fastened, due to impeller ring two sides in pump operation The effect of pressure difference and centrifugal force is easy to make junction of the edges of two sheets of paper toner screw, damages water pump so as to cause impeller ring abjection.

Summary of the invention

The object of the present invention is to provide the single-stage double-suction middle-opening pumps that anti-seal ring falls off, and are realized by improving seal gusset The effect of anti-cavitation, while preventing impeller ring from falling off by unique impeller sealing arrangement, it ensure that water pump safety and steady Ground operation.

In order to achieve the goal above, the technical solution adopted by the present invention are as follows: the single-stage double-suction middle-opening pump that anti-seal ring falls off, It includes front bearing block (2), rear bearings seat (11) and the pump shaft (10) through them, the middle part set of the pump shaft (10) It is connected to impeller and the pump housing (3) with impeller cooperation, and the pump housing (3) passes through fastener (1) and front bearing block (2) and rear bearings Seat (11) connection, is provided with seal member (7), the two sides of the pump housing (3) are set between the pump housing (3) and impeller (43) It is equipped with pump cover (5), is combined with stuffing seal (4) and mechanically-sealing apparatus (9) at the pump cover (5) of two sides respectively, it is described Stuffing seal (4) and mechanically-sealing apparatus (9) are cooperated by seal gusset (12) and pump cover (5) and impeller (43), and The gap of seal gusset (12) and pump cover (5) is 1.5-3mm, stops with the side of impeller (43) inlet side cooperation and pump cover (5) Mouth side is concordant；The flushing pipe (6) being arranged on the stuffing seal (4) and the pump housing (3) is connected to；The seal member It (7) include the impeller ring (42) being arranged on the outside of impeller (43), the impeller ring (42) and impeller (43) pass through diameter It is locked to the lock-screw (44) of setting；It is provided with casing ring (41) on the outside of the impeller ring (42), it is described Casing ring (41) be arranged on the pump housing (3).

Further, the impeller ring (42) and impeller (43) are interference fit, the impeller ring (42) and casing ring (41) is clearance fit.

Further, detection hole (4101) are offered on the casing ring (41).

Further, the lock-screw (44) includes main body (4401), main body (4401) and impeller ring (42) One layer of rubber layer (4402) is provided on the outside of the position of cooperation.

Further, limiting slot (4403), the limit are provided on the inside of the flange position of the lock-screw (44) The stop collar (4301) being arranged on position slot (4403) and impeller (43) cooperates.

Further, it is provided on the outside of the flange of the lock-screw (44) and tightens block (4404).

The invention has the benefit that

1, make seal on the basis of the original increasing is widened at the gusset on seal, the gap with pump cover is in 1.5- 3mm, it is concordant when the side of cooperation is with pump cover seam allowance with impeller inlet, improve the anti-cavitation performance of single-stage double-suction middle-opening pump.

2, impeller and impeller ring are locked by the clamping screw being arranged radially, pine will not occurs because of wheel rotation It is dynamic, impeller ring can be effectively prevented and fallen off, ensure that water pump is safely and smoothly run, and assembled simple；It simultaneously can be with It is not limited by the impeller of special substance.

3, sealing effect, impeller ring and pump housing sealing can be improved using interference fit in impeller ring and impeller Ring is gap-matched, and can reduce abrasion.

4, the design of detection hole can observe the gap between casing ring and impeller ring, and then realize more preferable Be coupled effect.

5, the design of rubber layer can be such that impeller ring and clamping screw cooperates even closer, further prevent impeller Sealing ring falls off.

6, the cooperation of stop collar and limiting slot further enhances the locking effect of lock-screw, prevents screw mobile, and And it will not influence the installation of screw.

7, the design for turning block greatly facilitates tightening for lock-screw, improves assembly efficiency.

Detailed description of the invention

Fig. 1 is the structural schematic diagram for the single-stage double-suction middle-opening pump that anti-seal ring falls off.

Fig. 2 is the structural schematic diagram of seal member.

Fig. 3 is the partial enlarged view of B in Fig. 2.

Fig. 4 is the structural schematic diagram of clamping screw.

Label character shown in figure indicates are as follows: 1, fastener；2, front bearing block；3, the pump housing；4, stuffing seal； 5, pump cover；6, flushing pipe；7, seal member；8, silk plug block；9, mechanically-sealing apparatus；10, pump shaft；11, rear bearings seat；12, Seal gusset；41, casing ring；42, impeller ring；43, impeller；44, lock-screw；4101, detection hole；4301, Stop collar；4401, bolt body；4402, rubber layer；4403, limiting slot；4404, block is tightened.

Specific embodiment

In order to make those skilled in the art more fully understand technical solution of the present invention, with reference to the accompanying drawing to the present invention into Row detailed description, the description of this part be only it is exemplary and explanatory, should not have any limitation to protection scope of the present invention Effect.

As Figure 1-Figure 4, structure of the invention are as follows: the single-stage double-suction middle-opening pump that anti-seal ring falls off, before it includes Portion's bearing block 2, rear bearings seat 11 and the pump shaft 10 through them, the middle part of the pump shaft 10 are socketed with impeller and and impeller The pump housing 3 of cooperation, and the pump housing 3 is connect by fastener 1 with front bearing block 2 and rear bearings seat 11, the pump housing 3 and leaf It is provided with seal member 7 between wheel 43, the two sides of the pump housing 3 are provided with pump cover 5, are combined with respectively at the pump cover 5 of two sides Stuffing seal 4 and mechanically-sealing apparatus 9, the stuffing seal 4 and mechanically-sealing apparatus 9 pass through seal gusset 12 cooperate with pump cover 5 and impeller 43, and the gap of seal gusset 12 and pump cover 5 is 1.5-3mm, cooperates with 43 inlet side of impeller Side it is concordant with 5 seam allowance side of pump cover；The flushing pipe 6 being arranged on the stuffing seal 4 and the pump housing 3 is connected to；Described Seal member 7 includes the impeller ring 42 being arranged on the outside of impeller 43, and the impeller ring 42 and impeller 43 pass through radial direction The lock-screw 44 of setting is locked；The outside of the impeller ring 42 is provided with casing ring 41, and the pump housing is close Seal ring 41 is arranged on the pump housing 3.

Preferably, the impeller ring 42 and impeller 43 are interference fit, the impeller ring 42 and the pump housing Sealing ring 41 is clearance fit.

Preferably, detection hole 4101 is offered on the casing ring 41.

Preferably, the lock-screw 44 includes main body 4401, the position that main body 4401 and impeller ring 42 cooperate Outside is provided with one layer of rubber layer 4402.

Preferably, limiting slot 4403, the limiting slot are provided on the inside of the flange position of the lock-screw 44 4403 cooperate with the stop collar 4301 being arranged on impeller 43.

Preferably, it is provided on the outside of the flange of the lock-screw 44 and tightens block 4404.

When specifically used, casing ring 41 has first been opened up into detection hole 4101, casing ring 41 is then loaded into pump Body 3 later by 42 sets of impeller ring on impeller 43, and cooperates corresponding hole location, later loads onto lock-screw 44, and It is fitted close rubber layer 4402 and impeller ring 42, is fitted close limiting slot 4403 and stop collar 4301, it then will dress Impeller 43 and the pump housing 3 after good are assembled, and are assembled entire single-stage double-suction middle-opening according to Fig. 1 and are pumped, in the operation process of pump, Good anti-cavitation can be played by the seal gusset 12 of specific setting.

It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic Element.

Used herein a specific example illustrates the principle and implementation of the invention, the explanation of above example It is merely used to help understand method and its core concept of the invention.The above is only a preferred embodiment of the present invention, it answers When pointing out due to the finiteness of literal expression, and objectively there is unlimited specific structure, for the common skill of the art For art personnel, without departing from the principle of the present invention, several improvement, retouching or variation can also be made, can also incited somebody to action Above-mentioned technical characteristic is combined in the right way；These improve retouching, variation or combination, or the not improved structure by invention Think and technical solution directly applies to other occasions, is regarded as protection scope of the present invention.

Claims (6)

1. the single-stage double-suction middle-opening pump that anti-seal ring falls off, which is characterized in that it includes front bearing block (2), rear bearings seat (11) and in the middle part of their pump shaft (10), the pump shaft (110) impeller and the pump housing with impeller cooperation are socketed with (3), and the pump housing (3) is connect by fastener (1) with front bearing block (2) and rear bearings seat (11), the pump housing (3) and It is provided between impeller (43) seal member (7), the two sides of the pump housing (3) are provided with pump cover (5), the pump cover (5) of two sides Place is combined with stuffing seal (4) and mechanically-sealing apparatus (9), the stuffing seal (4) and mechanical seal respectively Device (9) is cooperated by seal gusset (12) and pump cover (5) and impeller (43), and seal gusset (12) and pump cover (5) Gap is 1.5-3mm, the side cooperated with impeller (43) inlet side is concordant with pump cover (5) seam allowance side；The packing seal dress The flushing pipe (6) being arranged on (4) and the pump housing (3) is set to be connected to；The seal member (7) includes the leaf being arranged on the outside of impeller (43) It takes turns sealing ring (42), the impeller ring (42) and impeller (43) pass through the lock-screw (44) being arranged radially and lock；Institute It is provided with casing ring (41) on the outside of the impeller ring (42) stated, the casing ring (41) is arranged in the pump housing (3) on.

2. the single-stage double-suction middle-opening pump that anti-seal ring according to claim 1 falls off, which is characterized in that the impeller is close Seal ring (42) and impeller (43) are interference fit, and the impeller ring (42) and casing ring (41) are clearance fit.

3. the single-stage double-suction middle-opening pump that anti-seal ring according to claim 2 falls off, which is characterized in that the pump housing is close Detection hole (4101) are offered in seal ring (41).

4. the single-stage double-suction middle-opening pump that anti-seal ring according to claim 1 falls off, which is characterized in that the locking screw Nail (44) includes main body (4401), is provided with one layer of rubber layer on the outside of the position that main body (4401) and impeller ring (42) cooperate (4402)。

5. the single-stage double-suction middle-opening pump that anti-seal ring according to claim 4 falls off, which is characterized in that the locking screw It follows closely and is provided with limiting slot (4403) on the inside of the flange position of (44), the limit being arranged on the limiting slot (4403) and impeller (43) Position ring (4301) cooperates.

6. the single-stage double-suction middle-opening pump that anti-seal ring according to claim 5 falls off, which is characterized in that the locking screw It follows closely to be provided on the outside of the flange of (44) and tightens block (4404).