Rotary fluid machinery and method for eliminating axial rotor displacement

Abstract

An externally-supported rotary fluid machinery and a method for eliminating axial rotor displacement. The fluid machinery includes a box body, an air cylinder and a rotor, wherein the rotor is eccentrically mounted in the air cylinder; the air cylinder is mounted in the box body; one end of a sliding plate is inserted in the rotor, and the other end is embedded in a wall of the air cylinder; a fluid inlet is provided on the box body, and a fluid outlet is provided on the air cylinder; a support end of the rotor protrudes out of the box body and is supported in a rotor bearing support structure; and a support end of the air cylinder also protrudes out of the box body and is supported in an air cylinder bearing support structure.

Claims

1. An externally-supported rotary fluid machinery, comprising a box body, an air cylinder and a rotor, wherein: the rotor is eccentrically mounted in the air cylinder; the air cylinder is mounted in the box body; one end of a sliding plate is inserted in the rotor, and the other end is embedded in a wall of the air cylinder; a fluid inlet is provided on the box body; a fluid inlet is provided on a working section of the air cylinder; and a fluid outlet is provided on a support section of the air cylinder, wherein a support end of the rotor protrudes out of the box body and is supported in a rotor bearing support structure, or a support section of the air cylinder also protrudes out of the box body and is supported in an air cylinder bearing support structure, and each of the rotor bearing support structure and the air cylinder bearing support structure consists of two bearings, a space ring located between the bearings, a sleeve and an end scaling plate.

2. The externally-supported rotary fluid machinery according to claim 1, wherein the rotor bearing support structure is mounted in an airtight space formed by a shaft sealing structure to improve a lubrication cooling effect, and prevent a high pressure high temperature fluid from polluting a bearing and a lubricant in the rotor bearing support structure.

3. The externally-supported rotary fluid machinery according to claim 1, wherein the air cylinder bearing support structure is mounted in an airtight space formed by the shaft sealing structure to improve a lubrication cooling effect, and prevent a high pressure high temperature fluid from polluting a bearing and a lubricant in the air cylinder bearing support structure.

4. The externally-supported rotary fluid machinery according to claim 2, wherein the shaft sealing structure consists of a threaded sealing structure and a shaft seal structure which reduces a high pressure generated during rotation.

5. The externally-supported rotary fluid machinery according to claim 1, wherein a power input end is a rotor or air cylinder.

6. The externally-supported rotary fluid machinery according to claim 1, wherein the externally-supported rotary fluid machinery is configured to apply of one or both of an externally-supported structure that forms an independently sealed bearing working cavity and a plane bearing structure that eliminates axial displacement in a rotary compressor, a liquid pump, a vacuum pump and a multiphase mixed transportation pump.

7. An externally-supported rotary fluid machinery, comprising a box body, an air cylinder and a rotor wherein: the rotor is eccentrically mounted in the air cylinder; the air cylinder is mounted in the box body; one end of a sliding plate is inserted in the rotor, and the other end is embedded in a wall of the air cylinder; a fluid inlet is provided on the box body; a fluid inlet is provided on a working section of the air cylinder; and a fluid outlet is provided on a support section of the air cylinder, wherein a support end of the rotor protrudes out of the box body and is supported in a rotor bearing support structure; or a support section of the air cylinder also protrudes out of the box body and is supported in an air cylinder bearing support structure, wherein the support end of the rotor is provided with a plane bearing configured to eliminate the axial displacement and reduce and eliminate the wear between the end surface of the rotor and a cylinder cover of the air cylinder; and each of the rotor bearing support structure and the air cylinder bearing support structure consists of two bearings, a space ring located between the bearings, a sleeve and an end sealing plate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a structural schematic diagram of an existing rotary compressor.

(2) FIG. 2 is a structural schematic diagram of the present invention.

(3) FIG. 3 is a structural schematic diagram showing the location of a fluid inlet.

DETAILED DESCRIPTION

(4) The present invention is further explained in combination with drawings and embodiments.

Embodiment 1

(5) As show in FIG. 2

(6) An externally-supported rotary compressor (or one of a fluid pump, a vacuum pump and a multiphase mixed transportation pump) comprises a box body 1, an air cylinder 2 and a rotor 3, wherein the rotor 3 is eccentrically mounted in the air cylinder 2, a power end of the rotor 3 protrudes out of the box body and is connected to a drive prime motor (for example a motor), as shown in the left end in FIG. 2, the air cylinder is mounted in the box body 1, one end of a sliding plate 5 is inserted in the rotor 3, and the other end is embedded in a wall of the air cylinder; a fluid inlet 4 is provided on the box body 1, a fluid inlet 100 (see FIG. 3) is provided on a working section 20 of the air cylinder, and a fluid outlet 6 (air or liquid discharging port) is provided on a support section 19 of the air cylinder; a support end of the rotor 3 protrudes out of the box body 1 and is supported in a rotor bearing support structure 7, a support section of the air cylinder 2 also protrudes out of the box body 1 and is supported in an air cylinder bearing support structure 8. Each of the rotor bearing support structure 7 and the air cylinder bearing support structure 8 consists of two bearings 12, a space ring 13 located between bearings, a sleeve 14 and 5 an end sealing plate 15. As shown in FIG. 2, the rotor bearing support structure 7 and the air cylinder bearing support structure 8 are both mounted in an airtight space formed by a shaft sealing structure to improve a lubrication cooling effect, and prevent a high pressure high temperature fluid from polluting a bearing and a lubricant in the rotor bearing support structure 7 and in the air cylinder bearing support structure 8, and the leakage of a fluid at the inlet and compression leakage are also obstructed. During specific implementation, the shaft sealing structure consists of a threaded sealing structure 9 and a shaft seal structure 18 which can reduce a high pressure generated during rotation. During specific implementation, the externally-supported structure can also be provided on one side of the rotor or the air cylinder, and the other side is still supported in a traditional manner.

Embodiment 2

(7) An externally-supported rotary compressor (or one of a fluid pump, a vacuum pump and a multiphase mixed transportation pump) comprises a box body 1, an air cylinder 2 and a rotor 3, wherein the rotor 3 is eccentrically mounted in the air cylinder 2, a power end of the rotor 3 protrudes out of the box body and is connected to a drive prime motor (for example a motor), as shown in the left end in FIG. 2, the air cylinder is mounted in the box body 1, one end of a sliding plate 5 is inserted in the rotor 3, and the other end is embedded in a wall of the air cylinder; a fluid inlet 4 is provided on the box body 1, a fluid inlet (not shown) is provided on a working section 20 of the air cylinder, and a fluid outlet 6 (gas or liquid) is provided on a support section 19 of the air cylinder; a support end of the rotor 3 protrudes out of the box body 1 and is supported in a rotor bearing support structure 7, a support section of the air cylinder 2 also protrudes out of the box body 1 and is supported in an air cylinder bearing support structure 8, and the support end of the rotor 3 is provided with a plane bearing 10 capable of eliminating the axial displacement and reducing and eliminating the wear between the end surface of the rotor and a cylinder end cover 11 of the air cylinder. Each of the rotor bearing support structure 7 and the air cylinder bearing support structure 8 consists of two bearings 12, a space ring 13 located between bearings, a sleeve 14 and an end sealing plate 15. As shown in FIG. 2, the rotor bearing support structure 7 and the air cylinder bearing support structure 8 are both mounted in an airtight space formed by a shaft sealing structure to improve a lubrication cooling effect, and prevent a high pressure high temperature fluid from polluting a bearing and a lubricant in the rotor bearing support structure 7 and in the air cylinder bearing support structure 8. During specific implementation, the shaft sealing structure consists of a threaded sealing structure 9 and a shaft seal structure 18 which can reduce a high pressure generated during rotation.

(8) Embodiment 2 differs from embodiment 1 in that the plane bearing 10 capable of eliminating a rotor axial gap is increased, one end of the plane bearing abuts against a step surface of a rotor support end (rotor shaft), the other end of the plane bearing abuts against an end sealing plate 17, and the end sealing plate 17 is connected to the box body 1 through a connector. From FIG. 2, it can be seen that the plane bearing can ensure that the rotation of the rotor is not affected, the counter-acting force transmitted from the step surface can be counteracted, such that the rotor does not generate axial movement due to a stress.

Embodiment 3

(9) An externally-supported rotary compressor (or one of a fluid pump, a vacuum pump and a multiphase mixed transportation pump) comprises a box body 1, an air cylinder 2 and a rotor 3, wherein the rotor 3 is eccentrically mounted in the air cylinder 2, a power end of the rotor 3 protrudes out of the box body and is connected to a drive prime motor (for example a motor), as shown in the left end in FIG. 2, the air cylinder is mounted in the box body 1, one end of a sliding plate 5 is inserted in the rotor 3, and the other end is embedded in a wall of the air cylinder; a fluid inlet 4 is provided on the box body 1, a fluid inlet (not shown) is provided on a working section 20 of the air cylinder, and a fluid outlet 6 is provided on a support section 19 of the air cylinder; a support end of the rotor 3 is provided with a plane bearing 10 capable of eliminating the axial displacement and reducing and eliminating the wear between the end surface of the rotor and a cylinder end cover 11 of the air cylinder, one end of the plane bearing abuts against a step surface of a rotor support end (rotor shaft), the other end of the plane bearing abuts against an end sealing plate 17, and the end sealing plate 17 is connected to the box body 1 through a connector. From FIG. 2, it can be seen that the plane bearing can ensure that the rotation of the rotor is not affected, the counter-acting force transmitted from the step surface can be counteracted, such that the rotor does not generate axial movement due to a stress.

(10) Embodiment 3 differs from embodiment 2 in that mo matter the bearing supports the air cylinder is a traditional built-in from or an external form in embodiment 2, the plane bearing structure of the present embodiment can be singly adopted to eliminate an axial displacement gap of the rotor, that is to say, one plane bearing can be mounted on one end of the rotor outside the box body, a resilience force of the plane bearing is used to counteract an axial thrust force applied to the rotor, such that a predetermined gap is maintained between the rotor and the inner end face of the air cylinder.

(11) During specific implementation, in embodiments 1-3 of the present invention, the rotor 3 can be an integral structure in FIG. 2, and can also be designed into a sectional combined structure, for example, the power input section and the working section are separately manufactured and then are combined into an integral structure. The air cylinder 2 can also be designed into a split structure, and the support section 19 (with an outlet passage) and the working section 20 in FIG. 2 are combined to form a complete air cylinder 2.

(12) In addition, during specific implementation, the power input end can be changed into a cylinder support section from a rotor support section, and both of them have the same technical effect.

(13) According to the difference of positions of shafts generating axial displacement, the plane bearing can be located on one or two ends of mounting equipment.

(14) The above is merely part of optimal embodiments of the present invention, those skilled in the art can apply part or all of the independent bearing sealing support structure and the plane bearing to similar rotary equipment according to the revelation of the present invention, which are all considered to be within a protective range of the present invention.

(15) Parts not involved in the present invention are same as the prior art or can be implemented by adopting the prior art.