CN116255298A

CN116255298A - Double-inlet positive displacement turbine booster pump

Info

Publication number: CN116255298A
Application number: CN202310540489.0A
Authority: CN
Inventors: 王晓晖; 蒋虎忠; 苗森春; 史凤霞; 祁炳; 王东伟
Original assignee: Lanzhou University of Technology
Current assignee: Lanzhou University of Technology
Priority date: 2023-05-15
Filing date: 2023-05-15
Publication date: 2023-06-13
Anticipated expiration: 2043-05-15
Also published as: CN116255298B

Abstract

The invention discloses a double-inlet positive-displacement turbine booster pump, which comprises a turbine side, a pump side and a main shaft for energy recovery, wherein the pump body on the turbine side is elliptical, a rotor is arranged in the pump body, the rotor is connected with the pump side through the main shaft, a sliding vane is arranged on the rotor in a sliding manner, an inlet channel is arranged at the top of the pump body, an outlet channel is arranged on the side surface of the pump body, an inlet I, an inlet II, an outlet I and an outlet II are respectively arranged on the pump body, a second inlet is connected with the inlet II through an inlet transition flow channel, the outlet II is connected with the second outlet through an outlet transition flow channel, the double-inlet positive-displacement turbine structure has higher efficiency in recovering high-temperature high-viscosity liquid, the turbine side pump body is elliptical, and two inlets are arranged in a diagonal arrangement mode, so that the radial force generated by the rotor can be self-balanced, and the unit can run stably; the double inlets are all positioned at the maximum position of the turbine working cavity, so that the recovery efficiency of the turbine is highest, and the rotors are subjected to two action moments at the same time, so that the unit is easier to start.

Description

Double-inlet positive displacement turbine booster pump

Technical Field

The invention relates to a turbo booster pump, in particular to a double-inlet positive displacement turbo booster pump.

Background

In the industrial process flows of synthetic ammonia decarburization, petrochemical hydrocracking, reverse osmosis sea water desalination system and the like, a large amount of high-pressure liquid exists, the traditional operation mode is to reduce the pressure of the liquid through components such as a pressure reducing valve and the like, so that part of energy is directly wasted, and a turbine booster pump is used as a liquid residual pressure energy recovery device, so that the liquid residual pressure energy in the industrial process flows can be effectively recovered. The turbine booster pump is composed of a main shaft, an energy recovery turbine side and a pump side, and a turbine rotor is connected with a pump impeller through the main shaft. The high-pressure liquid enters from the inlet of the energy recovery turbine side, drives the turbine rotor to rotate, and drives the coaxial and directly-connected pump impeller, so that the pressurization of the low-pressure liquid at the pump inlet is completed.

In most industrial process flows, the high-pressure liquid is usually high-temperature high-viscosity liquid, and the efficiency of the existing centrifugal turbine booster pump is greatly reduced when the high-temperature high-viscosity liquid is recovered due to the limitation of the existing centrifugal turbine booster pump, so that the requirements of industrial production are difficult to meet.

Disclosure of Invention

The technical task of the present invention is to provide a dual inlet volumetric turbo booster pump which aims at the defects of the prior art.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a two import positive displacement turbo booster pumps, includes turbine side, pump side and the main shaft that are used for energy recuperation, wherein the pump body of turbine side is oval be equipped with the rotor in the pump body, the rotor passes through the main shaft and is connected with the pump side the sliding vane is equipped with on the rotor the top of the pump body is equipped with the inlet channel be equipped with the import baffle in the inlet channel, be the second import that is located import baffle top, be located import baffle below be equipped with the export passageway the side of the pump body be equipped with the export baffle in the export passageway, be located export baffle top for first export, be located export baffle below be the second export be equipped with import first, import second, export first and export second on the pump body respectively, first import is connected with import first export, import second is located the below of the pump body, export first and export is connected with first export, export second is located the opposite position of export, export two passes through export transition runner and second export connection.

Further improvement: the upper edge of the first inlet and the lower edge of the second inlet are tangential to the long axis of the pump body.

Further improvement: and the outer diameter of the rotor is set to be D, the long axis of the pump body is set to be a= (1.55-1.75) D, the short axis length is set to be b= (1.05-1.10) D, and the radial heights of the inlet I and the inlet II are set to be h= (0.25-0.30) D.

The invention has the advantages that: the double-inlet positive-displacement turbine structure has higher efficiency in recovering high-temperature high-viscosity liquid, the pump body at the turbine side is elliptical, and two inlets are formed, and the double-inlet diagonal arrangement mode can self-balance the radial force generated by the rotor, so that the unit operates stably; the double inlets are all positioned at the maximum position of the turbine working cavity, so that the recovery efficiency of the turbine is highest, and the rotors are subjected to two action moments at the same time, so that the unit is easier to start.

Drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Figure 2 is a cross-sectional view of A-A of figure 1 in accordance with the present invention.

Fig. 3 is a cross-sectional view of B-B of fig. 1 in accordance with the present invention.

Fig. 4 is a schematic view of the structure of the right side of the pump body of the present invention.

Fig. 5 is a schematic view of the left side of the pump body of the present invention.

Fig. 6 is a schematic view of the dimensions of the internal structure of the pump body of the present invention.

In the figure: turbine side a, main shaft B, pump side C, pump body 1, rotor 11, slide 2, inlet channel 3, inlet partition 30, first inlet 31, second inlet 32, first inlet 41, second inlet 42, inlet transition flow passage 51, outlet transition flow passage 52, first outlet 61, second outlet 62, outlet channel 7, outlet partition 70, first outlet 71, second outlet 72.

Detailed Description

The present invention will be described in detail below with reference to the drawings attached to the specification.

As shown in fig. 1 to 6, a dual-inlet positive displacement turbo pump comprises a turbine side a, a pump side C and a main shaft B for energy recovery, wherein a pump body 1 of the turbine side a is elliptical, a rotor 11 is arranged in the pump body 1, the rotor 11 is connected with the pump side C through the main shaft B, a sliding vane 2 is slidably arranged on the rotor 11, an inlet channel 3 is arranged at the top of the pump body 1, an inlet partition plate 30 is arranged in the inlet channel 3, a second inlet 32 is arranged above the inlet partition plate 30, a first inlet 31 is arranged below the inlet partition plate 30, an outlet channel 7 is arranged on the side surface of the pump body 1, an outlet partition plate 70 is arranged in the outlet channel 7, a first outlet 71 is arranged above the outlet partition plate 70, a second outlet 72 is arranged below the outlet partition plate 70, an inlet 41, an inlet second 42, an outlet 61 and an outlet 62 are respectively arranged on the pump body 1, the inlet second 42 is arranged below the pump body 1, the inlet 32 is connected with the inlet 42 through a transition channel 51, the outlet 61 is connected with the outlet 62 through the transition channel 51, and the outlet 62 is arranged at the position opposite to the outlet 72.

The upper edge of the first inlet 41 and the lower edge of the second inlet 42 are tangential to the long axis of the pump body 1; let the outer diameter of the rotor be D, the long axis of the pump body 1 be a= (1.55-1.75) D, the short axis length be b= (1.05-1.10) D, wherein the radial height of the inlet one 41 and the inlet two 42 is h= (0.25-0.30) D.

The working principle is as follows: the high-pressure liquid enters from the inlet channel 3 of the energy recovery turbine side A, the liquid is divided into two flows to enter from the first inlet 31 and the second inlet 32 respectively under the action of the inlet partition plate 30, wherein the liquid in the first inlet 31 enters into the upper part of the pump body 1 from the first inlet 41, and the liquid in the second inlet 32 enters into the lower part of the pump body 1 after reaching the second inlet 42 through the inlet transition flow channel 51.

In the process of rotation of the rotor 11, the outer sides of the sliding sheets 2 are always kept in contact with the inner wall of the pump body 1, the sliding sheets 2 can slide and stretch on the rotor 11 according to the shape of the pump body 1, thus, the side plates of two adjacent sliding sheets 2, the rotor 11, the pump body 1 and the two ends of the pump body 1 form a working cavity, and when the hydraulic pressure of one side of the working cavity is higher than that of the other side, the torque generated by the sliding sheets 2 drives the main shaft B to rotate, and the main shaft B drives the impeller in the pump side C to rotate.

With the rotation of the rotor 11, the liquid in the upper part of the pump body 1 enters the first outlet 71 through the first outlet 61, the liquid in the lower part of the pump body 1 enters the second outlet 72 through the second outlet 62 through the outlet transition flow passage 52, and finally the liquid in the first outlet 71 and the second outlet 72 flow out after being converged in the outlet passage 7, so that the conversion from pressure energy to rotary mechanical energy is completed.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. A dual inlet volumetric turbo booster pump comprising a turbo side for energy recovery, a pump side and a main shaft, characterized in that: the turbine pump comprises a turbine pump body, a rotor, a sliding vane, an inlet channel, an inlet partition plate, an outlet channel, an outlet partition plate, an inlet first outlet, an outlet first inlet, an outlet first outlet and an outlet second outlet, wherein the rotor is arranged in the turbine pump body and connected with the turbine pump side through a main shaft, the sliding vane is arranged on the rotor in a sliding mode, the top of the pump body is provided with the inlet channel, the inlet partition plate is arranged in the inlet channel, the outlet partition plate is arranged below the inlet partition plate, the outlet channel is arranged on the side face of the pump body, the outlet partition plate is arranged above the outlet channel, the outlet partition plate is arranged below the outlet channel, the inlet first outlet, the outlet first outlet and the outlet second outlet are respectively arranged on the pump body, the first inlet is connected with the inlet first outlet, the second inlet is arranged below the pump body, the outlet first outlet is connected with the first outlet through an inlet transition flow passage, the outlet is arranged at the opposite position of the outlet first outlet, and the outlet is connected with the second outlet through an outlet transition flow passage.

2. A dual inlet volumetric turbo booster pump as defined in claim 1, wherein: the upper edge of the first inlet and the lower edge of the second inlet are tangential to the long axis of the pump body.

3. A dual inlet volumetric turbo booster pump as defined in claim 1, wherein: and the outer diameter of the rotor is set to be D, the long axis of the pump body is set to be a= (1.55-1.75) D, the short axis length is set to be b= (1.05-1.10) D, and the radial heights of the inlet I and the inlet II are set to be h= (0.25-0.30) D.