CN202158014U

CN202158014U - High-temperature high-inlet-pressure single stage pump hydraulic power part structure

Info

Publication number: CN202158014U
Application number: CN2011202709688U
Authority: CN
Inventors: 胡未东; 王天周; 赵兴英
Original assignee: Chongqing Pump Industry Co Ltd
Current assignee: Chongqing Pump Industry Co Ltd
Priority date: 2011-07-28
Filing date: 2011-07-28
Publication date: 2012-03-07
Anticipated expiration: 2021-07-28

Abstract

A high-temperature high-inlet-pressure single stage pump hydraulic power part structure, which comprises a pump body and a pump cover which are forged in forging molding mode. The pump cover is arranged on the pump body to form an annular pressurized-water chamber. The high-temperature high-inlet-pressure single stage pump hydraulic power part structure further comprises a shaft connected with a power mechanism, the shaft penetrates through the pump cover to be connected with a rotating shaft of an impeller arranged in the pump body, a back-blade-free radial guide vane is arranged between the impeller and the annular pressurized-water chamber, and the back-blade-free radial guide vane is provided with spiral through holes communicated with the annular pressurized-water chamber. By means of the structural form of the pump body and the pump cover which are formed in forging mode, the structure is high-temperature resistant and high-pressure resistant. Liquid flow which flows out from the impeller is collected through match of the back-blade-free radial guide vane and the annular pressurized-water chamber, accordingly liquid flow speed is reduced, kinetic energy of liquid is converted into pressure energy, rotating motion and radial speed circular rector of the liquid flow which flows out from an impeller outlet is removed, radial force during the running process is balanced, alternating stress born by the shaft and directional deflection generated by the shaft are eliminated, heating is even, flowing in the pressurized-water chamber is guaranteed to be in the axial symmetry mode, hydraulic loss is reduced, and the running is more stable and efficient.

Description

Single-stage pump hydraulic part structure is pressed in the high import of a kind of high temperature

Technical field

The utility model relates to the single stage centrifugal pump parts, the especially a kind of high import pressure of high temperature single stage centrifugal pump hydraulic part structure that is applicable to.

Background technique

Before the eighties in 20th century, single stage single suction volute pump is main with Type B and BA type pump mainly; Begin from the mid-80; Unit organizations such as Ministry of Machine-Building Industry by have at that time been developed the single stage single suction volute pump that meets the some patterns of international standard ISO2858; Like IS, IB, IH and IR type etc.; It is mainly used in fields such as industry, agricultural, chemical industry and hot water, mainly is divided into four big types of clean waterpump, hot water pump, chemical flow-process pump and sewage pumps etc.IS and IB type pump are pumped the clear water that temperature is not higher than 80 ℃ clear water or contains small quantities of particles, and IR type pump is pumped the hot water that temperature is not higher than 150 ℃, and IH type pump is used to pump temperature and is chemical mediums such as-20 ~ 105 ℃ nitric acid, sulfuric acid, phosphoric acid, alkali.The structure of its hydraulic part adopts impeller to add the structure of casting spiral volute chamber or annular volute chamber usually, can realize the application of operating mode through the size of adjustment impeller and volute chamber, and such single-stage pump is mainly used in middle cryogenic media, middle low discharge operating conditions.Because the pump housing and the pump cover of the type pump are all casting, existing casting technique and level have the limit at thickness, have restricted single-stage pump thereupon and have told the inlet pressure of fed sheet of a media and the limit value of running temperature.Growth requirement along with modern industry and high and new technology; Promoting single stage single suction volute pump develops toward complex dielectrics such as high temperature, high pressure, thermal shock, low radial force, low alternating stress, high efficiency and requirements at the higher level operating conditions direction; Especially use in some safety and the high place of performance requirement; Like fields such as nuclear power, thermoelectricity, oil, the structural type of existing single stage centrifugal pump hydraulic part and intensity just are difficult to satisfy the applying working condition requirement.

The model utility content

To above-mentioned technical problem; The utility model provides a kind of medium that can carry the high import of high temperature to press; Radial force in the balance movement process and the high import pressure of the high temperature that reduces alternating stress single-stage pump hydraulic part structure, this modular construction also has the advantage of high pressure-bearing and heat shock resistance.

In order to solve the problems of the technologies described above, the utility model provides the high import of a kind of high temperature to press single-stage pump hydraulic part structure, comprises the pump housing and is installed in the pump cover on the pump housing; Also comprise the axle that power mechanism connects; The rotating shaft of the impeller in this passes said pump cover and is arranged on the said pump housing is connected, and said pump housing set inside has annular pumping chamber, it is characterized in that; Radially stator of no back blade is set between said impeller and annular pumping chamber; Said no back blade radially evenly has the spiral through hole that is communicated with said annular pumping chamber on the stator, eliminates the radial vector and collection drainage, the radial force in the balance movement of impeller outlet flow whereby.

Further characteristic, the said pump housing and pump cover forging molding, and be processed to form accurate, bright and clean annular pumping chamber through simple and mechanical, effectively solve pump inlet medium temperature height and the high transport requirement of pressure.

Compared with prior art, the remarkable result of the utility model is:

1. increase radially stator of a no back blade between outlet through being employed in the impeller current and the annular pumping chamber, cooperate annular pumping chamber structure, the flow collection that impeller is flowed out; Reduce flow rate of liquid; Make the kinetic energy of flow of fluid change pressure energy into, the flow behind the elimination impeller outlet rotatablely moves and the radial velocity circular rector radial force in the balance movement process; Eliminate the suffered alternating stress of axle and the directed amount of deflection of generation; Guarantee the axis of flow symmetry in the pumping chamber, reduce hydraulic loss simultaneously, raise the efficiency.

2. the annular pumping chamber that forms of the annular pumping chamber of the forging molding pump housing and pump cover; Eliminate and adopt the defective that causes heavy wall to bring to reduce cost of production simultaneously; Satisfy the operating conditions of high temperature (pressure for vaporization thereupon), high pressure and heat shock resistance; Temperature distortion simultaneously is even, improves the feasibility of processing technology and the reliability of use.

Description of drawings

The structural representation of Fig. 1 the utility model.

Embodiment

Below in conjunction with specific embodiment the utility model is done further explain.

As shown in Figure 1; The utility model; Single-stage pump hydraulic part structure is pressed in the high import of high temperature, comprises the pump housing 1 and pump cover 2 of the method forging of adopting forging molding, and pump cover 2 is installed in and forms annular pumping chamber 5 on the pump housing 1; Also comprise the axle 3 that power mechanism connects; This 3 rotating shaft of passing pump cover 2 and being arranged on the impeller 4 in the pump housing 1 is connected, and radially stator 6 of no back blade is set between impeller 4 and annular pumping chamber 5, and this no back blade radially evenly has the spiral through hole that is communicated with annular pumping chamber 5 on the stator 6.

The utility model is that traditional hydraulic part structural type such as single stage single suction volute pumps such as IS, IB, IH and IR types is optimized and reforms.Adopt the pump housing 1 and pump cover 2 structural types of forging molding; Eliminate to adopt and to cause the defective that heavy wall brings and to have reduced cost of production; Satisfy the operating conditions of high temperature, high pressure and heat shock resistance, temperature distortion simultaneously is even, improves the feasibility of processing technology and the reliability of use.No back blade radially evenly is furnished with spiral through hole on the stator 6, make through no back blade radially stator 6 flow that impeller 4 is flowed out collect and deliver to annular pumping chamber 5, the reduction flow stream velocity; Make the kinetic energy of liquid change pressure energy into, the flow of eliminating the impeller outlet outflow rotatablely moves and the radial velocity circular rector radial force in the balance movement process; Eliminate the axle 3 suffered alternating stress and the directed amount of deflection of generation, be heated evenly, guarantee that the axis of flow in the pumping chamber is symmetrical; Reduce hydraulic loss; Under the prerequisite that guarantees safety and performance, operation is more steadily with efficient, and integral processing is more feasible.

The foregoing description of the utility model only is to give an example for what explanation the utility model was done, and is not to be the qualification to the mode of execution of the utility model.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation and changes.Here can't give exhaustive to all mode of executions.Conspicuous variation that every technological scheme that belongs to the utility model is amplified out or change still are in the row of the protection domain of the utility model.

Claims

1. single-stage pump hydraulic part structure is pressed in the high import of high temperature; Comprise the pump housing (1) and be installed in the pump cover (2) on the pump housing (1); Also comprise the axle (3) that power mechanism connects; The rotating shaft of the impeller (4) in this axle (3) passes said pump cover (2) and is arranged on the said pump housing (1) is connected, and the said pump housing (1) set inside has annular pumping chamber (5), it is characterized in that; Radially stator (6) of no back blade is set between said annular pumping chamber (5) and impeller (4), and said no back blade radially evenly has the spiral through hole that is communicated with said annular pumping chamber (5) on the stator (6).

2. single-stage pump hydraulic part structure is pressed in the high import of high temperature according to claim 1, it is characterized in that, and the said pump housing (1) and pump cover (2) forging molding, and form said annular pumping chamber (5).