CN110821823A

CN110821823A - Rotor pump

Info

Publication number: CN110821823A
Application number: CN201911137594.XA
Authority: CN
Inventors: 陈宝琛; 李儒金
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-02-21

Abstract

The invention discloses a rotor pump, which comprises a pump body, wherein a pump shaft is arranged in the pump shaft, a horizontal cycloid cylindrical surface cam is installed on the pump shaft through a flat key, a rhombic outlet A and a rhombic outlet B are processed at the position of the horizontal cycloid cylindrical surface cam on the front side wall of the pump body, a rhombic inlet B ' and a rhombic inlet A ' are processed at the position of the horizontal cycloid cylindrical surface cam on the rear side wall of the pump body, the outlet A is opposite to the inlet B ', the outlet B is opposite to the inlet A ', the inlet A ' and the outlet A are completely opened when the horizontal cycloid cylindrical surface cam rotates 180 degrees, the inlet B ' and the outlet B are completely closed, the inlet B ' and the outlet B are completely opened when the horizontal cycloid cylindrical surface cam rotates 360 degrees, and the inlet A and the outlet A are completely closed. The invention cancels the piston in the traditional pump, so that the rotor has no friction, and can be suitable for multiple working conditions and variable working conditions, such as pumping oil, gas, water, sand and the like.

Description

Rotor pump

Technical Field

The invention relates to a pump, in particular to a rotor pump.

Background

Self-priming pumps are currently common pumps in the industrial field. The volume self-priming pump in the prior art is generally a screw pump and a roots pump. The screw pump has the defects of high energy consumption, low efficiency and extremely high maintenance cost in the use process of oil fields, so the screw pump cannot be selected. Most of the secondary crude oil transportation in oil fields is centrifugal pumps, and the centrifugal pumps have no self-absorption capacity and do no help to the thick oil.

Therefore, the oil field urgently needs a pump which is suitable for multiple working conditions and variable working conditions.

Disclosure of Invention

According to the technical problems, the invention provides a rotor pump which has the advantages of scientific structure, fewer parts, small volume, strong suction force, small cavitation, small vibration, low noise, energy conservation, environmental protection, stable performance, adaptation to multiple working conditions and variable working conditions (pumping oil, gas, water and sand), and is a professional high-end rotor pump for conveying crude oil for one time in an oil field. The technical means adopted by the invention are as follows:

a rotor pump comprises a pump body, wherein a pump shaft and a sealing device are arranged in the pump body, the pump shaft is coaxially arranged with the pump body, the sealing device is arranged in the pump body and used for sealing the pump body, the pump shaft is connected with a driving device for driving the pump shaft to rotate, a flat cycloid cylindrical surface cam is installed on the pump shaft through a flat key, a rhombic outlet A and a rhombic outlet B are processed at the position of the flat cycloid cylindrical surface cam on the front side wall of the pump body, a rhombic inlet B ' and a rhombic inlet A ' are processed at the position of the flat cycloid cylindrical surface cam on the rear side wall of the pump body, the outlet A is opposite to the inlet B ', the outlet B is opposite to the inlet A ', the inlet A ' and the outlet A ' are completely opened when the flat cycloid cylindrical surface cam rotates 180 degrees, the inlet B ' and the outlet B are completely closed, when the flat cycloid cam rotates 360 degrees, the inlet B 'and the outlet B are completely opened, and the inlet A' and the outlet A are completely closed.

The cam with the flat cycloid cylindrical surface is of an integrated structure consisting of three parts, namely a central cylinder and flow guide curved surfaces which are arranged on two sides of the central cylinder in a conjugate and symmetrical mode; the outlet A and the inlet B 'are opposite to one of the flow guide curved surfaces, and the outlet B and the inlet A' are opposite to the other flow guide curved surface.

The profile line of the cam with the cylindrical surface with the horizontal cycloid is an intersection curve of an annular space curved surface formed by connecting two conjugate symmetrical horizontal cycloid lines end to end and the central cylinder, and the flow guide curved surface is formed by a straight bus which is vertical, rotates 360 degrees around the axis of the central cylinder and goes up and down along the profile line.

The extending direction of the short shaft of the rhombus is parallel to the axial direction of the cycloidal cylindrical surface cam.

The driving device can be a driving motor and a coupling, and the driving motor is connected with the pump shaft through the coupling. The pump body and the driving device can be arranged on the pump base.

The cam with the cycloid cylindrical surface is made of nano-scale ceramics and silicon carbide.

The sealing device comprises large framework sealing seats which are respectively arranged at two ends of the pump body and penetrate into the pump body, each large framework sealing seat comprises a main body, a large framework which is arranged on the main body and is close to one end of the horizontal cycloid cylindrical surface cam, and a sealing seat which is arranged on the main body and is far away from one end of the horizontal cycloid cylindrical surface cam, the outer diameters of the sealing seat and the large framework are matched with the inner diameter of the pump body, and the outer edge of the sealing seat on one side close to the end face of the pump body extends outwards and is fixedly connected with the end face of the pump body; a bearing seat and a bearing seat end cover matched with the pump shaft are arranged in one side of the sealing seat close to the end face of the pump body;

the main body is arranged between the sealing seat and the large framework and between the large framework and the horizontal cycloid cylindrical surface cam, mechanical sealing elements sleeved on the pump shaft are arranged on the main body, and small framework sealing elements sleeved on the pump shaft are arranged between the two mechanical sealing assemblies on the main body.

The inner surface of the pump body is subjected to electrochemical treatment or nitriding treatment of chemical indium and then mirror honing treatment, so that the corrosion resistance, wear resistance and durability of the pump body are ensured.

The principle of the invention is as follows: when the cam on the cylindrical surface of the horizontal cycloid rotates, the inlet and the outlet of the pump body generate pressure difference (the inlet pressure is large and the outlet pressure is small) due to the combined action of the volume change and the atmospheric pressure in the pump body; due to the relative motion of the flat cycloid cylindrical surface cam and the rhombic inlet and outlet, the opening degrees of the rhombic outlet A, the rhombic outlet B, the rhombic inlet A 'and the rhombic inlet B' are continuously changed, so that the reverse cyclic change of two pairs of inlet and outlet pressures from zero to the maximum for sucking media, sealing the outlet pressure building and changing the pressure from the maximum to the zero (the inlet A 'is high in pressure, the outlet B is low in pressure, the inlet B' is low in pressure, the outlet A is high in pressure and vice versa) is realized, the driving media are output through the pump body, the high pressure and the low pressure alternately realize the cyclic change of the pressure from zero to the maximum for sucking the media and the pressure from the maximum to the zero for discharging the media; the cycloid cylindrical surface cam rotates 180 degrees to suck a medium once, and rotates 360 degrees to suck the medium twice to form a male and female hole, so that the medium flows in respective channels, and the rotating speed is in direct proportion to the flow. .

The outlet A, the outlet B, the inlet A 'and the inlet B' provided by the invention are in a rhombus shape, and if the outlet A, the outlet B, the inlet A 'and the inlet B' are not in a rhombus shape, the effect of sucking out the medium can not be achieved. Observing the track of the cycloidal cylindrical cam, finding that the rotor (the cycloidal cylindrical cam) can pump out the medium without a baffle (a piston) but has no friction, but the inlet and the outlet are diamond-shaped openings, and only the diamond-shaped openings are the natural track.

The invention has the following advantages:

1. the pump can idle under the condition of no medium, has the working principle of a vacuum pump, 960 revolutions per minute under the condition of medium and the working principle of a centrifugal pump, and 300 revolutions per minute is the working principle of a volumetric pump. Realizes the multi-purpose of one pump.

2. The cam with the cycloid cylindrical surface adopts a conjugate double-end curved surface cycloid molded line, so that the suction force is naturally increased, and the flow is increased.

3. The large-framework sealing seat and the mechanical seal are arranged on the inner side of the pump body, so that the problem of leakage of the pump is solved.

4. The motor shaft is directly connected with the pump shaft through the coupler, the transmission chain is short, the pump efficiency is high, the structure is simple, pump parts are few, the noise is low, the energy is saved, the environment is protected, and the performance is stable.

5. The bearing seat is arranged independently, so that the bearing is completely isolated from the medium, the service life of the bearing is prolonged, the bearing is suitable for multiple working conditions, the bearing is used under variable working conditions, and the reliability and stability of the system are improved.

6. The invention has the advantages of high pump efficiency, small volume, strong suction, large flow, small cavitation, small vibration, low noise, environmental protection, high reliability, good stability and the like.

7. The components such as the piston and the like in the traditional pump are eliminated, so that the rotor can not generate friction with the piston in the rotation process.

For the reasons, the invention can be widely popularized in the fields of rotor pumps and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a cross-sectional view of a pump body in accordance with an embodiment of the present invention.

FIG. 2 is a top view of the pump body in accordance with an embodiment of the present invention.

FIG. 3 is a front view of the pump body in an embodiment of the present invention.

FIG. 4 is a side view of a pump body in accordance with an embodiment of the present invention.

Fig. 5 is a schematic structural view of a large frame seal seat according to an embodiment of the present invention.

FIG. 6 is a semi-sectional view of a trochoidal cylindrical cam in accordance with an embodiment of the present invention.

FIG. 7 is a top view of a trochoidal cylindrical cam in accordance with an embodiment of the present invention.

FIG. 8 is a front view of a trochoidal cylindrical cam in accordance with an embodiment of the present invention.

FIG. 9 is a back view of a trochoidal cylindrical cam in accordance with an embodiment of the present invention.

Fig. 10 is a development view of a hypocycloidal cylindrical cam in accordance with an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 10, a rotor pump includes a pump body 1, a pump shaft 2 coaxially disposed with the pump body and a sealing device 5 disposed in the pump body 1 for sealing the pump body 1 are disposed in the pump body 1, the pump shaft 2 is connected to a driving device for driving the pump shaft 2 to rotate, a planar cycloidal cylindrical cam 4 is mounted on the pump shaft 1 through a flat key 3, a rhombic outlet a and a rhombic outlet B are formed at a position of the planar cycloidal cylindrical cam 4 on a front side wall of the pump body 1, a rhombic inlet B 'and a rhombic inlet a' are formed at a position of the planar cycloidal cylindrical cam 4 on a rear side wall of the pump body 1, the outlet a is opposite to the inlet B ', the outlet B is opposite to the inlet a', and the inlet a and the outlet a are completely opened when the planar cycloidal cylindrical cam 4 rotates 180 degrees, the inlet B ' and the outlet B are completely closed, when the hypocycloid cylindrical surface cam 4 rotates 360 degrees, the inlet B ' and the outlet B are completely opened, and the inlet a ' and the outlet a are completely closed.

The cam 4 with the flat cycloid cylindrical surface is an integrated structure consisting of three parts, namely a central cylinder 41 and flow guide curved surfaces 42 which are arranged on two sides of the central cylinder 41 and are in conjugate symmetry; the outlet A and the inlet B 'are opposite to one of the flow guide curved surfaces 42, and the outlet B and the inlet A' are opposite to the other flow guide curved surface 42.

The profile line of the cam 4 with the hypocycloid cylindrical surface is an intersection curve of an annular space curved surface formed by connecting two conjugate symmetrical hypocycloids end to end and the central cylinder, and the flow guide curved surface is formed by a straight bus which is vertical, rotates 360 degrees around the axis of the central cylinder and goes up and down along the profile line.

The extending direction of the minor axis of the rhombus is parallel to the axial direction of the hypocycloid cylindrical surface cam 4.

The cam 4 with the flat cycloid cylindrical surface is made of nano-scale ceramics and silicon carbide.

The sealing device 5 comprises large framework sealing seats 51 which are respectively arranged at two ends of the pump body 1 and penetrate into the pump body 1, each large framework sealing seat 51 comprises a main body 52, a large framework 53 which is arranged on the main body 52 and is close to one end of the cycloidal cylindrical surface cam 4, and a sealing seat 54 which is arranged on the main body 52 and is far away from one end of the cycloidal cylindrical surface cam 4, the outer diameters of the sealing seat 54 and the large framework 53 are matched with the inner diameter of the pump body 1, and the outer edge of the sealing seat 54 at one side close to the end surface of the pump body 1 extends outwards and is fixedly connected with the end surface of the pump body 1; a bearing seat 55 and a bearing seat end 56 cap which are matched with the pump shaft 2 are arranged in one side of the sealing seat 54 close to the end face of the pump body 1;

mechanical sealing elements 57 sleeved on the pump shaft 2 are arranged between the sealing seat 54 and the large framework 53 and between the large framework 53 and the hypocycloidal cylindrical surface cam 4 of the main body 51, and a small framework sealing element 58 sleeved on the pump shaft 2 is arranged between the two mechanical sealing elements 57 of the main body 51.

The inner surface of the pump body 1 is subjected to electrochemical treatment or nitriding treatment of chemical indium and then mirror honing treatment, so that the corrosion resistance, wear resistance and durability of the pump body are ensured.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotor pump comprises a pump body, wherein a pump shaft and a sealing device are arranged in the pump body, the pump shaft and the sealing device are coaxially arranged in the pump body, the sealing device is arranged in the pump body and seals the pump body, the pump shaft is connected with a driving device which drives the pump shaft to rotate, and the rotor pump is characterized in that: the pump shaft is provided with a flat cycloid cylindrical surface cam through a flat key, the front side wall of the pump body is provided with a rhombic outlet A and a rhombic outlet B at the position of the flat cycloid cylindrical surface cam, the rear side wall of the pump body is provided with a rhombic inlet B 'and a rhombic inlet A' at the position of the flat cycloid cylindrical surface cam, the outlet A is opposite to the inlet B ', the outlet B is opposite to the inlet A', the inlet A 'and the outlet A are completely opened when the flat cycloid cylindrical surface cam rotates for 180 degrees, the inlet B' and the outlet B are completely closed, the inlet B 'and the outlet B are completely opened when the flat cycloid cylindrical surface cam rotates for 360 degrees, and the inlet A' and the outlet A are completely closed.

2. A rotary pump according to claim 1, wherein: the cam with the flat cycloid cylindrical surface is of an integrated structure consisting of three parts, namely a central cylinder and flow guide curved surfaces which are arranged on two sides of the central cylinder in a conjugate and symmetrical mode; the outlet A and the inlet B 'are opposite to one of the flow guide curved surfaces, and the outlet B and the inlet A' are opposite to the other flow guide curved surface.

3. A rotary pump according to claim 2, wherein: the profile line of the cam with the cylindrical surface with the horizontal cycloid is an intersection curve of an annular space curved surface formed by connecting two conjugate symmetrical horizontal cycloid lines end to end and the central cylinder, and the flow guide curved surface is formed by a straight bus which is vertical, rotates 360 degrees around the axis of the central cylinder and goes up and down along the profile line.

4. A rotary pump according to claim 2, wherein: the extending direction of the short shaft of the rhombus is parallel to the axial direction of the cycloidal cylindrical surface cam.

5. A rotary pump according to claim 1, wherein: the cam with the cycloid cylindrical surface is made of nano-scale ceramics and silicon carbide.

6. A rotary pump according to claim 1, wherein: the sealing device comprises large framework sealing seats which are respectively arranged at two ends of the pump body and penetrate into the pump body, each large framework sealing seat comprises a main body, a large framework which is arranged on the main body and is close to one end of the horizontal cycloid cylindrical surface cam, and a sealing seat which is arranged on the main body and is far away from one end of the horizontal cycloid cylindrical surface cam, the outer diameters of the sealing seat and the large framework are matched with the inner diameter of the pump body, and the outer edge of the sealing seat on one side close to the end face of the pump body extends outwards and is fixedly connected with the end face of the pump body; a bearing seat and a bearing seat end cover matched with the pump shaft are arranged in one side of the sealing seat close to the end face of the pump body;

7. A rotary pump according to claim 1, wherein: the inner surface of the pump body is subjected to mirror honing treatment after electrochemical treatment or nitridation treatment of chemical indium.