CN201351612Y

CN201351612Y - Single-stage double-sucking centrifugal liquid pump

Info

Publication number: CN201351612Y
Application number: CNU2009201109114U
Authority: CN
Inventors: 张宝华
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-10
Filing date: 2009-02-10
Publication date: 2009-11-25
Anticipated expiration: 2019-02-10

Abstract

The utility model relates to a single-stage double-sucking centrifugal liquid pump which comprises a pump body, a pump cover, a main shaft, an impeller, a bearing body and a bearing; the impeller is mounted on the main shaft and arranged in the pump body; the main shaft is supported by the bearing body and the bearing; the single-stage double-sucking centrifugal liquid pump is characterized in that a water inlet flow passage and a water outlet flow passage are arranged on the pump body; the pump cover connected with the pump body is provided with the water inlet flow passage connected with the pump body; the impeller is an impeller with double water sucking holes; and a mechanical envelope is arranged in the cooling room of the pump cover. The single-stage double-sucking centrifugal liquid pump overcomes the defect of a single-stage single-sucking cantilever type centrifugal pump: a double-sucking impeller effectively reduces the axial force, and the bearings arranged at the two ends can fully bear the remained and little axial force, which leads the water pump to run stably, and simultaneously ensures sealing parts to run within a normal abrasion scope. A large cooling room is arranged on the pump cover, which can effectively reduce the heat transmitted in the outside through the cooling of an outside water source, prolong the service life of mechanical sealing and the bearing, and lead the mechanical sealing to have no leakage, thus leading the liquid in the pump to not drain, and greatly reducing the occupied area.

Description

A kind of single-stage double-suction centrifugar liquid pump

Technical field

The utility model relates to the single-stage double-suction centrifugar liquid pump of pumping liquid in a kind of industrial production (as media such as syrup, paper pulp, bucks).

Background technique

Use single stage single suction cantilever type centrifugal pump widely in the existing industrial production, general axial force is bigger.Though the vent through the impeller back side has reduced section axial power, but most of axial force is to be born by bearing, thereby causes bearing weak point in working life, water pump vane and sealed member quick abrasion, has directly influenced the working life of water pump, has improved maintenance cost.Next is not have cooling chamber or cooling chamber volume less than normal, and cooling effect is poor, only adapt to≤80 ℃ of water temperature conditions and use down, and a lot of liquid of carrying in the industrial production all has temperature requirement.There is following defective as S type liquid pump: 1, do not have cooling chamber, can not effectively fall the heat that fluid temperature transmits, cause bearing running hot, influence the normal operation of bearing, shortened the working life of bearing; 2, if be used for the syrup liquid pump, the liquid of carrying in the pump then will be improved to single-ended mechanical seal as oiling agent,, its functional reliability is relatively poor; 3, the design of pump is the water inlet of front end substantially horizontal, and rear end substantially horizontal water outlet, cooling hand over fruit poor, and the installation floor space is bigger.

Summary of the invention

It is little that the purpose of this utility model provides a kind of axial force, adaptive temperature scope≤150 ℃, stable performance, long service life, the single-stage double-suction centrifugar liquid pump that maintenance cost is low (syrup paper pulp dedicated pump).

The technical solution of the utility model is: the single-stage double-suction centrifugar liquid pump is made up of parts such as the pump housing, pump cover, main shaft, impeller, machine big envelope, bearing support, bearings; It is characterized in that the pump housing is provided with into water, water outlet two-part runner, establish the water inlet flow channel that connects the pump housing on the pump cover, impeller is a double suction mouth of a river impeller, and the machine big envelope is installed in the cooling chamber of pump cover.

The utility model has overcome the shortcoming of single stage single suction cantilever type centrifugal pump: double-entry impeller has effectively reduced axial force, the bearing that is placed in two ends can bear a spot of axial force of residue fully, make the smooth running of water pump energy, also guarantee that sealed member is turning round simultaneously in normal wear range.Pump cover is provided with big cooling chamber; cooling by extraneous water source can effectively reduce the outside heat that transmits; protection mechanical seal and bearing are not subjected to the influence of the high heat of high temperature; the life-span of prolonged mechanical sealing and bearing; mechanical seal does not have leakage; both made the interior liquid of pump not have loss, the environment around having protected again is not contaminated, also alleviates the pressure of effluent discharge.The simple and clear compact result of the highly versatile of component, conveniently dismounting.Axially the pump housing of water-exit vertically can reduce floor space greatly.

Description of drawings

Fig. 1 is an internal structure sectional view of the present utility model.

Fig. 2 is a pump housing plan view of the present utility model

Fig. 3 is the A-A sectional view of Fig. 2.

Fig. 4 is a pump cover structural representation of the present utility model.

Fig. 5 is B-B (rotation) sectional view of Fig. 4.

Fig. 6 is a profile plan view of the present utility model.

Fig. 7 is that the C of Fig. 6 is to side view.

Among the figure, 1-bearing cap first, 2-round nut, 3-bearing support, 4-bearing interstage sleeve, 5-mechanical seal end cap, 6-pump cover, 7-main shaft, the 8-pump housing, 9-seal ring, 10-double-entry impeller, 11-impeller interstage sleeve, 12-machine big envelope, 13-mechanical seal, 14-axle sleeve, 15-bearing support, 16-bearing cap second, 17-locking nut, 18-coupling, the 19-supporting frame, D-water inlet flow channel, E-cooling chamber.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing, but be not limited to shown in the accompanying drawing.

As shown in Figure 1, the utility model is made up of parts such as the pump housing 8, pump cover 6, double-entry impeller 10, main shaft 7, axle sleeve 14, machine big envelope 12, mechanical seal 13,

bearing support

3,15, coupling 18; Double-entry impeller 10 is the double suction mouth of a river, be installed on the pump housing inner main axis 7, the double-entry impeller two ends are impeller interstage sleeve 11, impeller interstage sleeve outer end is mechanical seal 13 and machine big envelope 12, the machine big envelope is installed in the cooling chamber of pump cover, machine big envelope outside again is bearing

support

3,15 and bearing cap, and pump cover 6 is connected with the pump housing 8.

Shown in Fig. 2,3, the water inlet of the pump housing is in substantially horizontal, and water outlet is a Vertical direction.The water inlet flow channel branch both sides of the pump housing enter the pump cover water inlet flow channel.Shown in Fig. 4,5, the runner of pump cover is the semi-circular double-entry impeller water intake that enters, and is exported by pump housing outlet passage after the double-entry impeller pressurization.Machine big envelope 12 is packed in the pump cover cooling chamber, and cooling chamber is risen and reduced the heat of carrying liquid transfer by external water source supply cooling water, and mechanical seal and bearing support inner bearing are not subjected to the influence of the high heat of high temperature in the protection machine big envelope.As be replaced by the filler cover when using packing seal and get final product.The influence that the transient vibration feed water pump that produces when preventing starting of pump station brings is being strengthened supporting by having added a supporting frame 19 on the bearing support of coupling end, and as shown in Figure 6, remaining part connects as shown in Figure 1.

Claims

1, a kind of single-stage double-suction centrifugar liquid pump, comprise the pump housing, pump cover, main shaft, impeller, bearing support, bearing, impeller is loaded on the main shaft, and put in the pump housing, main shaft is characterized in that by the supporting of bearing support and bearing the pump housing is provided with into water, water outlet two-part runner, with the water inlet flow channel of establishing the connection pump housing on the pump cover that the pump housing is connected, impeller is a double suction mouth of a river impeller, and the machine big envelope is installed in the cooling chamber of pump cover.

2, single-stage double-suction centrifugar liquid pump according to claim 1, the water inlet that it is characterized in that the pump housing is in substantially horizontal, and water outlet is a Vertical direction.

3, single-stage double-suction centrifugar liquid pump according to claim 1 is characterized in that the runner of pump cover is semi-circular.