CN101149052A - A pressurization and recovery combined pump with asymmetric cavity - Google Patents

Abstract

The invention discloses a pressurization and recovery combined pump with an asymmetric shape cavity, which comprises a left pump body, a right pump body, a cylinder arranged between the axial direction of the left pump body and the right pump body, and a rotor in the cylinder. It is characterized in that the cylinder is provided with a roughly elliptical pump chamber, and the rotor divides it into two crescent-shaped and opposite boost chambers and recovery chambers, and their small arc radii r are equal, that is, the rotor The radius of the arc; the large arc radius R1 of the boost chamber is greater than the large arc radius R2 of the recovery chamber; the left pump body is provided with a raw material liquid inlet and a treatment liquid outlet; the right pump body is provided with a raw material liquid The outlet and the treatment liquid inlet; the raw material liquid inlet and the raw material liquid outlet are connected to the boost chamber; the treatment liquid inlet and the treatment liquid outlet are connected to the recovery chamber; at least 4 blades that can expand and contract in the radial direction of the rotor are evenly distributed on the circumference of the rotor. The combined pump of the invention has the advantages of simple and compact structure, low noise, etc., and is widely used in the fields of reverse osmosis water treatment and petroleum and chemical production.

Description

A pressurization and recovery combined pump with asymmetric cavity

technical field

The invention relates to a fluid machine, in particular to a combination pump for pressurizing and recovering fluid.

Background technique

In many processes in reverse osmosis water treatment and petroleum and chemical production fields, it is necessary to pressurize the fluid to high pressure before proceeding to the next step of treatment, and the remaining liquid after treatment has high pressure energy. Recovering the pressure energy in the remaining fluid is of great significance to reduce energy consumption and product cost.

The main forms of fluid machinery currently used for liquid pressure energy recovery are: (1) Turbine type, similar in structure to centrifugal pumps, and opposite in function to pumps. It is generally used coaxially with the centrifugal pump. In the case of small fluid flow, the efficiency is low, and the structure of the main moving parts is complex. (2) Piston type, the processing capacity of a single machine is low, and special valves are required to be used in the system, which causes the complexity of the system operation.

Contents of the invention

The technical problem to be solved by the present invention is to provide a pressurization-recovery combination pump with an asymmetric cavity, which has the advantages of simple and compact structure, low noise, and easy implementation in the system.

To achieve the above object, the present invention is achieved by taking the following technical solutions:

A pressurization and recovery combination pump with an asymmetric cavity, comprising a left pump body, a right pump body, a cylinder arranged between the axial direction of the left pump body and the right pump body, and a rotor in the cylinder, the characteristics of which are: The cylinder body has a roughly elliptical pump chamber, and the rotor divides it into two crescent-shaped and opposite boost chambers and recovery chambers, and their small arc radii r are equal, that is, the radius of the rotor; The large arc radius R1 of the pressure chamber is greater than the large arc radius R2 of the recovery chamber; the left pump body is provided with a raw material liquid inlet and a treatment liquid outlet; the right pump body is provided with a raw material liquid outlet and a treatment liquid outlet The inlet; the raw material liquid inlet and the raw material liquid outlet are connected to the boost chamber; the treatment liquid inlet and the treatment liquid outlet are connected to the recovery chamber; at least 4 blades that can expand and contract along the radial direction of the rotor are evenly distributed on the circumference of the rotor.

In the above scheme, the left side of the left pump body relative to the cylinder body is provided with a booster chamber inlet distribution groove and a recovery chamber outlet distribution groove respectively connected to the raw material liquid inlet and the treatment liquid outlet; the right pump body is opposite to the right side of the cylinder body The plane is provided with a flow distribution groove at the outlet of the booster chamber and an inlet distribution groove of the recovery chamber respectively connected to the outlet of the raw material liquid and the inlet of the treatment liquid; the circumference of the rotor is provided with uniformly distributed blade grooves, and the bottom of the blade grooves is provided with springs to connect the blades. Set in the vane groove, when the rotor rotates to the large arc radius R1 and R2 of the booster chamber and the recovery chamber, the blades are fully extended; when the rotor rotates to the small arc radius r of the booster chamber and the recovery chamber , the blades are all indented.

The fluid enters the booster chamber from the raw material liquid inlet of the left pump body through the distribution groove at the inlet of the booster chamber. processing unit. After passing through the treatment unit, the remaining high-pressure treatment liquid enters the recovery chamber of the same pump chamber in the cylinder body from the treatment liquid inlet of the right pump body through the inlet distribution groove of the recovery chamber connected to it, and pushes the rotor through the blades in the recovery chamber. , and discharge from the treatment liquid outlet through the outlet distribution groove of the recovery cavity of the left pump body.

The feature of the present invention is that the dual characteristics of the vane pump and the vane motor are combined, and the recovery chamber and the boosting chamber are arranged in the same pump chamber of the cylinder body. The high-pressure treatment liquid in the process is used to do work on the blades of the recovery chamber, output continuous rotary motion and torque, and recover pressure energy, thereby reducing the load of the pump and saving pump energy consumption. The energy recovery rate of the pump is 70%-80%, and there is no need for special valves to work together. The structure of the pump body is simple, the operation is simple and convenient, and the operation is reliable. Compared with other types of pumps, the required weight per unit power is small.

Description of drawings

Fig. 1 is a structural sectional view of the present invention.

Fig. 2 is a sectional view along line E-E of Fig. 1 .

Fig. 3 is a sectional view taken along line F-F of Fig. 1 .

Fig. 4 is a G-G sectional view of Fig. 1 .

In the picture:

1---Left pump body; 2---Shaft; 3, 9---Bearing; 4---Key; 5---Rotor; 6---Cylinder body; 7---Blade; 8-- -Right pump body; 10---oil seal; 11---shaft seal; 12---bolt; 13---left distribution groove; 14---right distribution groove; among them: 13a, 14c are booster Chamber inlet and outlet distribution grooves; 14d and 13b are recovery chamber inlet and outlet distribution grooves; A: raw material liquid inlet, B: raw material liquid outlet, C: processing liquid outlet, D: processing liquid inlet; V1: boost chamber V2: Recovery cavity

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings. Fig. 1 is a structural sectional view of a pressurization and recovery combination pump with an asymmetric cavity, which mainly includes a left pump body 1, a rotor 5, a cylinder body 6, blades 7, a right pump body 8 and a shaft 2, etc. Cylinder 6 is set between left pump body 1 and right pump body 8 axially; shaft 2 is installed on the pump body through bearing 3 on left pump body 1 and bearing 9 on right pump body 8, and rotor 5 is installed on the pump body through key 4 Connected to axis 2. A shaft seal 11 is arranged between the bearing 9 and the oil seal 10 to keep sealing, and the oil seal 10 is connected with the right pump body 8 by the screw at the outer end. Two opposite surfaces on the outside of the left pump body 1 are respectively provided with an interface: raw material liquid inlet A and treatment liquid outlet C; the two opposite surfaces on the outer side of the right pump body 8 are respectively provided with an interface: raw material liquid outlet B and treatment liquid inlet D.

As shown in Figure 2, the cylinder block 6 of the present invention has a substantially elliptical pump chamber, and the rotor 5 divides it into two crescent-shaped and opposite boost chamber V1 and recovery chamber V2, their small arc radius r is equal, that is, the radius of the rotor 5; the large arc radii of the boost chamber V1 and the recovery chamber V2 are not equal, which are R1 and R2 respectively, and R1 is greater than R2. The circumference of the rotor 5 is provided with circumferentially evenly distributed vane slots, the vanes 7 are arranged in the vane slots, the bottom of the vane slots is provided with a spring (not shown) to connect the vanes 7, and the vanes 7 can rotate with the rotor 2 in the position of the springs. Under the action, it extends or retracts radially along the rotor 5. When the rotor 5 rotates to the large arc radii R1 and R2 of the boost chamber V1 and the recovery chamber V2, the blades 7 are fully extended; when the rotor 5 rotates to the boost chamber At the small arc radius r of the chamber V1 and the recovery chamber V2, the blades 7 are all retracted, thereby further ensuring the sealing isolation between the boost chamber V1 and the recovery chamber V2.

As shown in FIG. 3 : the left pump body 1 , the cylinder body 6 and the right pump body 8 are connected by bolts 12 . On the left side of the left pump body 1 facing the cylinder body 6, there are four left distribution grooves 13 with a waist shape in the middle and semicircular ends at both ends. The flow distribution tank 13a is in communication with the raw material liquid inlet A, and the flow distribution tank 13b is in communication with the treatment liquid outlet C.

As shown in Figure 4: on the right side of the right pump body 8 facing the cylinder body 6, there are four right distribution grooves 14 with a waist shape in the middle and semicircular ends at both ends. Wherein the distribution channel 14c is connected with the outlet B of the raw material liquid, and the distribution channel 14d is connected with the inlet D of the treatment solution.

As shown in Figure 3 and Figure 4: when the shaft 2 drives the rotor 5 and blade 7 to rotate counterclockwise, the fluid enters the boost chamber V1 from the raw material liquid inlet A of the left pump body 1 through the flow distribution groove 13a, and the rotor 5 and blade 7 The rotation of the pump increases the pressure of the fluid, and the high-pressure fluid passes through the right pump body 8, and is output to the processing unit from the raw material liquid outlet B through the flow distribution groove 14c. After passing through the processing unit, the remaining high-pressure processing liquid enters the recovery chamber V2 of the same pump chamber in the cylinder body 5 from the processing liquid inlet D of the right pump body 8 through the flow distribution groove 14d, and pushes the rotor 5 through the blade 7 in the recovery chamber V2 to perform work. Afterwards, it is discharged from the treatment liquid outlet C through the flow distribution groove 13b of the left pump body 1.

A specific embodiment of the present invention is as follows; for example, when the motor 12 rotates at a standard speed of 1450 rpm, the blades 3 are arranged in 6 pieces in the radial direction, and the width of the blades 3 is 2.2mm. The large arc radius R1 of the boost chamber V1 is 63.3mm, the large arc radius R2 of the recovery chamber V2 is 61.3mm, the small arc radius r of the boost chamber V1 and the recovery chamber V2 are both 60mm, the boost chamber V1 The flow rate is 2.5m3/h; the flow rate of recovery chamber V2 is: 1.5m3/h. When the inlet pressure of the raw material liquid is 0.1-0.3Mpa, the outlet pressure is 7-10Mpa, and the inlet pressure of the treatment liquid is 5-9Mpa, the energy recovery efficiency is 70%-80%.

Claims (4)

1. the pressurization in an asymmetric shape chamber and reclaim unipump, comprise the left pump housing, the right pump housing, be arranged on the left pump housing and the right pump housing between axially cylinder body and the rotor in the cylinder body, it is characterized in that, described cylinder body has one and is roughly oval pump chamber, rotor is divided into two crescent shape and relative boost chamber and recovery chamber with it, their roundlet arc radius r equates, also is the radius of rotor; Boost the large circular arc radius R1 in chamber greater than the large circular arc radius R2 of recovery chamber; The described left pump housing is provided with material liquid import and treatment fluid outlet; The described right pump housing is provided with material liquid outlet and treatment fluid import; Material liquid import and material liquid outlet are communicated with the chamber of boosting; Treatment fluid import and treatment fluid outlet are communicated with recovery chamber; At least being evenly equipped with 4 on the described rotor circumference can be along the flexible blade of rotor radial.

2. the pressurization in asymmetric shape according to claim 1 chamber and reclaim unipump is characterized in that, the plane, left side of the relative cylinder body of the described left pump housing is provided with boost chamber import flow groove and recovery chamber outlet flow groove and is communicated with material liquid import and treatment fluid outlet respectively; The plane, right side of the relative cylinder body of the right pump housing is provided with boost chamber outlet flow groove and recovery chamber import flow groove and is communicated with material liquid outlet and treatment fluid import respectively.

3. the pressurization in asymmetric shape according to claim 1 and 2 chamber and recovery unipump is characterized in that, have circumferentially uniform blade groove on the circumference of described rotor, and described blade is arranged in this blade groove.

4. the pressurization in asymmetric shape according to claim 3 chamber and recovery unipump is characterized in that, described blade groove bottom is provided with spring and connects blade.

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