CN208442026U - A kind of list double suction mixed type middle open centrifugal pump - Google Patents

A kind of list double suction mixed type middle open centrifugal pump Download PDF

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Publication number
CN208442026U
CN208442026U CN201821036902.0U CN201821036902U CN208442026U CN 208442026 U CN208442026 U CN 208442026U CN 201821036902 U CN201821036902 U CN 201821036902U CN 208442026 U CN208442026 U CN 208442026U
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China
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impeller
bearing
sealing
pump
stage impeller
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CN201821036902.0U
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朱永斌
陈永波
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SHANGHAI PUMP MANUFACTURE CO Ltd
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SHANGHAI PUMP MANUFACTURE CO Ltd
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Abstract

The utility model discloses a kind of single double suction mixed type middle open centrifugal pumps, including pump case, rotary shaft, bearing arrangement, secondary impeller, the first first stage impeller, the second first stage impeller, sealing device, the first water inlet, the second water inlet, First Transition runner, the second transition runner and water outlet.Single double suction mixed type middle open centrifugal pump of a kind of big flow, high lift has been made by adopting the above technical scheme.Two first stage impellers are single-suction, alone hydrating structure, and secondary impeller is double-suction type, and such impeller matching structure can guarantee that the sealing of rotary shaft is in low-pressure area, and theoretical intake pressure is consistent, and axial force is negligible, is conducive to the Selection and Design of bearing;Impeller adjusting nut is directly exposed, can install entire rotor and carry out impeller adjusting again later, repairs, is all very convenient in installation;Without worrying to enter in bearing arrangement by the water exposed inside axle sleeve, bearing damage is caused.

Description

A kind of list double suction mixed type middle open centrifugal pump
Technical field
The utility model belongs to field of mechanical technique, is related to middle-opening pump field, in particular in a kind of single double suction mixed type Open centrifugal pump.
Background technique
In existing technology, middle-opening pump is generally single-stage double-suction form, by the pump housing, pump cover, impeller, axis, seal, axis The composition such as set, bearing body part, packing elements, mechanical sealing parts, the pump housing, pump cover are subject to impeller middle line, shape or so pair Claim, water outlet spiral case is bilayer, and pump import and export opens face in pump hereinafter, as base plane relative altitude;Impeller is that single-stage is double Suction, entrance are low-pressure area, and sealing, flushing water are generally confessed in left and right sealing, and sealing axle sleeve passes through two O-rings pair Water-stop, bearing are grease lubrication, and drive end bearing is positioned by retainer ring and axle sleeve, and non-driven-end bearing passes through the shaft shoulder, axle sleeve And round nut adds butterfly gasket to position.This centrifugal pump is mainly used for the fields such as water factory, petroleum, chemical industry, fire-fighting, field irrigation; Main use scope: flow about 75 arrives 2880m3/ h, lift about 10 arrive 220m, pumped (conveying) medium temperature≤105 DEG C.
Therefore need single double suction mixed type middle open centrifugal pump of a kind of big flow, high lift.
Utility model content
To solve the above-mentioned problems, the utility model provides single double suction mixed type middle open type of a kind of big flow, high lift Centrifugal pump.
One of the utility model list double suction mixed type middle open centrifugal pump, which is characterized in that including pump case, rotation Axis, bearing arrangement, secondary impeller, the first first stage impeller, the second first stage impeller, sealing device, the first water inlet, the second water inlet Mouth, First Transition runner, the second transition runner and water outlet, the pump case include the pump housing and pump cover, and the pump housing and pump cover connect It connects, rotary shaft is equipped between the pump housing, the rotating shaft terminal is respectively provided with a bearing arrangement, is equipped in the middle part of the pump housing secondary Grade impeller, the both ends of the secondary impeller are respectively provided with a first stage impeller, respectively the first first stage impeller and the second first stage impeller, First first stage impeller is located at the left side of secondary impeller, and second first stage impeller is located at the right side of secondary impeller, the rotation Shaft passes through pump case and connect with secondary impeller, the first first stage impeller and the second first stage impeller, the side of first first stage impeller Equipped with sealing device, the side of second first stage impeller is equipped with identical sealing device;
The first water inlet and the second water inlet are equipped with below the pump housing, first water inlet and the first first stage impeller connect It connects, second water inlet is connect with the second first stage impeller, and first first stage impeller and secondary impeller pass through First Transition stream Road connection, second first stage impeller are connect with secondary impeller by the second transition runner, and the secondary impeller connects water outlet.
In above scheme, the bearing arrangement includes bearing body cooling chamber, bearing body lubricating oil cavity, bearing body cooling water Entrance and bearing body cooling water outlet, the bearing body cooling chamber is set to bearing body lubricating oil containment portion, and wraps bearing Body lubricating oil cavity, the bearing body cooling water inlet are connect with bearing body cooling chamber, the bearing body cooling chamber and bearing body Cooling water outlet connection.
In above scheme, the sealing device is mechanical sealing parts, and the mechanical sealing parts include mechanical sealing member Gland and mechanical sealing member ontology, the mechanical sealing member gland and mechanical sealing member ontology axial restraint, the mechanical seal Fish paper pad is equipped between part gland and mechanical sealing member ontology.
In above scheme, the sealing device is filler sealing parts, and the filler sealing parts include packing seal pressure Lid, soft packing connects bolt with seal, the filling material seal gland and soft packing axial restraint, on the filling material seal gland Bolt is connected equipped with seal, the seal connection bolt protrudes into soft packing.
In above scheme, the pump housing and pump cover are horizontal middle open types, and fish paper pad is equipped between the pump housing and pump cover.
Advantages and beneficial effects of the utility model lie in that the utility model provides the Dan Shuan of a kind of big flow, high lift Persorption mould assembly middle open centrifugal pump.Two first stage impellers are single-suction, alone hydrating structure, and secondary impeller is double-suction type, this Kind impeller matching structure can guarantee that the sealing of rotary shaft is in low-pressure area, and theoretical intake pressure is consistent, and axial force is negligible, Be conducive to the Selection and Design of bearing;Impeller adjusting nut is directly exposed, can install entire rotor and carry out impeller tune again later Section repairs, is all very convenient in installation;Without worrying to enter in bearing arrangement by the water exposed inside axle sleeve, bearing is caused Damage.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of two kinds of sealing devices of the utility model;
Fig. 2 is the structural schematic diagram one of bearing arrangement;
Fig. 3 is the structural schematic diagram two of bearing arrangement.
In figure: 1, the pump housing 2, pump cover 3, rotary shaft 4, bearing arrangement 5, secondary impeller 6, the first first stage impeller 7, Two first stage impellers 8, mechanical sealing parts 9, filler sealing parts 41, bearing body cooling chamber 42, bearing body lubricating oil cavity 43, bearing body cooling water inlet 44, bearing body cooling water outlet 51, water outlet 61, the first water inlet 62, First Transition stream Road 71, the second water inlet 72, the second transition runner
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is further described.Implement below Example is only used for clearly illustrating the technical solution of the utility model, and cannot be used as a limitation the protection model of limitation the utility model It encloses.
As shown in Figure 1, the utility model is a kind of single double suction mixed type middle open centrifugal pump, use scope: flow is about 200 arrive 10000m3/ h, lift highest 360m, pumped (conveying) medium temperature≤165 DEG C.It can be used for building water supply, petroleum, chemical industry, disappear Anti-, heat supply network circulation draws Huang, the south water to north etc..Including pump case, rotary shaft 3, bearing arrangement 4, secondary impeller 5, the first first stage impeller 6, the second first stage impeller 7, sealing device, the first water inlet 61, the second water inlet 71, First Transition runner 62, the second transition flow Road 72 and water outlet 51, pump case include the pump housing 1 and pump cover 2, and the pump housing 1 is connect with pump cover 2, and rotary shaft 3, rotation are equipped between the pump housing 1 3 both ends of shaft are respectively provided with a bearing arrangement 4, are equipped with secondary impeller 5 in the middle part of the pump housing 1, the both ends of secondary impeller 5 are respectively provided with one First stage impeller, respectively the first first stage impeller 6 and the second first stage impeller 7, the first first stage impeller 6 are located at the left side of secondary impeller 5, Second first stage impeller 7 is located at the right side of secondary impeller 5, and rotary shaft 3 passes through pump case and secondary impeller 5, the first first stage impeller 6 and the The connection of two first stage impellers 7, the side of the first first stage impeller 6 are equipped with sealing device, and the side of the second first stage impeller 7 is equipped with identical Sealing device;Two sealing devices must use filler sealing parts with mechanical sealing parts or simultaneously simultaneously, can not one end fill out Material sealing, one end mechanical seal.
The first water inlet 61 and the second water inlet 71 are equipped with below the pump housing 1, the first water inlet 61 and the first first stage impeller 6 connect It connects, the second water inlet 71 is connect with the second first stage impeller 7, and the first first stage impeller 6 passes through First Transition runner 62 with secondary impeller 5 Connection, the second first stage impeller 7 are connect with secondary impeller 5 by the second transition runner 72, and secondary impeller 5 connects water outlet 51.
As shown in Figure 2 and Figure 3, bearing arrangement 4 is cold including bearing body cooling chamber 41, bearing body lubricating oil cavity 42, bearing body But water inlet 43 and bearing body cooling water outlet 44, bearing body cooling chamber 41 is set to outside bearing body lubricating oil cavity 42, and is wrapped Bearing body lubricating oil cavity 42 is wrapped, bearing body cooling water inlet 43 is connect with bearing body cooling chamber 41, bearing body cooling chamber 41 It is connect with bearing body cooling water outlet 44.Under normal circumstances, the temperature of bearing arrangement comes from two places: high-temperature medium and rotation Axis itself operates the temperature of generation.1, the temperature of high-temperature medium can be transferred to bearing arrangement outside by pump cover and axial rotary, then In addition temperature when bearing arrangement works itself, will exceed normal working temperature, and can be passed through by the heat of rotary shaft External flushing water reaches cooling effect, either packing seal or mechanical seal, requires to provide external flushing water, cause The heat water that is cooled substantially transmitted to bearing arrangement direction is taken away;Bearing arrangement itself operates the cooled water cavity of heat of generation Cooling water in body is taken away, and achievees the effect that reduce bearing working environment temperature.
Water flow is from two entrance location the first water inlets 61 of the pump housing 1 and the second water inlet 71, into the first first stage impeller 6 With the second first stage impeller 7, secondary leaf is flowed to by First Transition runner 62 and the second transition runner 72, water after doing work by chopped-off head Wheel 5, water flow reaches water outlet 51 after the pressurization of secondary impeller 5, and so far, liquid pressure process in pumping terminates.
The pump housing 1 and pump cover 2 are horizontal middle open types, fish paper pad are equipped between the pump housing 1 and pump cover 2, as gasket seal.
Pump cover delivery chamber runner is rectangularl runner, calculates distance between two-stage runner, runner by single-stage width of flow path Between thickness should guarantee bear pressure thickness, can not be too thick, one for guarantee castability, two for as far as possible reduce at This, transition runner position is the key that one of in this utility model, since chopped-off head delivery chamber eighth section, to secondary suction chamber For transition runner, principle of hydrodynamics is had followed in design, it then follows pump flow area changes principle, it then follows pump beautiful outline form Principle is seen, for cross sections in the case where equal length, area makes water flow laminar motion according to variation principle even variation, Guarantee that fluid linear loss when by transition runner is preferably minimized, guarantee also in need is a little exactly transition runner and secondary The position of delivery chamber will guarantee the thickness for having more than or equal to wall thickness axial, radial, it is ensured that runner is unable to intercommunication.Chopped-off head leaf Wheel selects optimal hydraulic model according to design parameter specific revolution, and the blade direction of rotation of first stage impeller is seen as the inverse time from impeller eye Needle, secondary impeller blade direction of rotation be it is clockwise, the position of keyway is needed to pay attention to when Impeller Machining keyway, makes two-stage The water outlet of impeller intermeshes.Intermediate bulkhead is housed among both stage impellers, makes independent mutually between two-stage delivery chamber, guarantee Single-stage lift as far as possible within theoretical scope of design, i.e., with mounting O-shaped rings on pump cover contact surface, having connecing for relative motion Contacting surface gap is controlled in minimum clearance standard, because this gap determines the axial force of this pump, gap is smaller, and axial force is smaller. Axle sleeve by sleeve nut position, come adjust impeller whether with runner centering.Sealing water can flow to position water receiving from chopped-off head, It is succinct convenient.For bearing arrangement in such a way that sliding and rolling bearing combine, slipper bears radial force, and rolling bearing is held By axial force, using thin oil lubricant mode, water cooling is carried out to oily domain external shell, guarantees bearing running temperature.
Embodiment one:
Wherein, sealing device is mechanical sealing parts 8, and mechanical sealing parts 8 include that mechanical sealing member gland and machinery are close Sealing ontology, mechanical sealing member gland and mechanical sealing member ontology axial restraint, mechanical sealing member gland and mechanical sealing member sheet Fish paper pad is equipped between body, as gasket seal, in order to prevent leak between seal ontology and mechanical seal cover.
Embodiment two:
Wherein, sealing device is filler sealing parts 9, and filler sealing parts include filling material seal gland, soft packing and close It seals body and connects bolt, filling material seal gland and soft packing axial restraint, filling material seal gland is equipped with seal and connects bolt, close Envelope body connection bolt protrudes into soft packing.Soft packing is adjusted by adjusting filling material seal gland and seal attachment bolt length Decrement reaches sealing purpose.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims (5)

1. a kind of list double suction mixed type middle open centrifugal pump, which is characterized in that including pump case, rotary shaft, bearing arrangement, secondary leaf Wheel, the first first stage impeller, the second first stage impeller, sealing device, the first water inlet, the second water inlet, First Transition runner, second Transition runner and water outlet, the pump case include the pump housing and pump cover, and the pump housing is connect with pump cover, and rotation is equipped between the pump housing Shaft, the rotating shaft terminal are respectively provided with a bearing arrangement, are equipped with secondary impeller in the middle part of the pump housing, the secondary impeller Both ends are respectively provided with a first stage impeller, respectively the first first stage impeller and the second first stage impeller, and first first stage impeller is located at The left side of secondary impeller, second first stage impeller are located at the right side of secondary impeller, and the rotary shaft passes through pump case and secondary leaf Wheel, the first first stage impeller and the connection of the second first stage impeller, the side of first first stage impeller are equipped with sealing device, and described second The side of first stage impeller is equipped with identical sealing device;
The first water inlet and the second water inlet are equipped with below the pump housing, first water inlet is connect with the first first stage impeller, Second water inlet is connect with the second first stage impeller, and first first stage impeller is connected with secondary impeller by First Transition runner It connects, second first stage impeller is connect with secondary impeller by the second transition runner, and the secondary impeller connects water outlet.
2. a kind of single double suction mixed type middle open centrifugal pump according to claim 1, which is characterized in that the bearing arrangement Including bearing body cooling chamber, bearing body lubricating oil cavity, bearing body cooling water inlet and bearing body cooling water outlet, the bearing Body cooling chamber is set to bearing body lubricating oil containment portion, and wraps bearing body lubricating oil cavity, and the bearing body cooling water enters Mouth is connect with bearing body cooling chamber, and the bearing body cooling chamber is connect with bearing body cooling water outlet.
3. a kind of single double suction mixed type middle open centrifugal pump according to claim 2, which is characterized in that the sealing device For mechanical sealing parts, the mechanical sealing parts include mechanical sealing member gland and mechanical sealing member ontology, and the machinery is close Sealing gland and mechanical sealing member ontology axial restraint are equipped with blueness between the mechanical sealing member gland and mechanical sealing member ontology Shell paper washer.
4. a kind of single double suction mixed type middle open centrifugal pump according to claim 2, which is characterized in that the sealing device For filler sealing parts, the filler sealing parts include that filling material seal gland, soft packing connect bolt with seal, described to fill out Expect that sealing gland and soft packing axial restraint, the filling material seal gland are equipped with seal and connect bolt, the seal connects Connecting bolt protrudes into soft packing.
5. a kind of single double suction mixed type middle open centrifugal pump according to claim 2, which is characterized in that the pump housing and pump Lid is horizontal middle open type, and fish paper pad is equipped between the pump housing and pump cover.
CN201821036902.0U 2018-07-02 2018-07-02 A kind of list double suction mixed type middle open centrifugal pump Active CN208442026U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821036902.0U CN208442026U (en) 2018-07-02 2018-07-02 A kind of list double suction mixed type middle open centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821036902.0U CN208442026U (en) 2018-07-02 2018-07-02 A kind of list double suction mixed type middle open centrifugal pump

Publications (1)

Publication Number Publication Date
CN208442026U true CN208442026U (en) 2019-01-29

Family

ID=65087503

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821036902.0U Active CN208442026U (en) 2018-07-02 2018-07-02 A kind of list double suction mixed type middle open centrifugal pump

Country Status (1)

Country Link
CN (1) CN208442026U (en)

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