CN114986135A

CN114986135A - Gas bearing dismounting device and dismounting method thereof

Info

Publication number: CN114986135A
Application number: CN202210766880.8A
Authority: CN
Inventors: 张晓华; 霍志勇; 柯长磊; 李空荣; 董斌; 彭楠
Original assignee: Technical Institute of Physics and Chemistry of CAS
Current assignee: Technical Institute of Physics and Chemistry of CAS
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-09-02

Abstract

The invention relates to a gas bearing dismounting device and a dismounting method thereof, wherein the gas bearing dismounting device comprises a support main body and a dismounting module, the support main body is used for being connected with a machine core, the dismounting module comprises a plurality of studs, a tension plate, a thrust bearing, a plurality of springs, a spring bin and a screw rod, the gas bearing dismounting device can be connected with the machine core of a small-sized turbo expander through the support main body, and the deformation generated by self-adaption due to compression of the plurality of springs can be fed back to the tension plate in the dismounting process, so that the end face of a gas bearing can be ensured to be uniformly stressed in the dismounting process, the gas bearing can be kept in good parallelism with the machine core, and finally the gas bearing can be smoothly dismounted from the machine core.

Description

Gas bearing dismounting device and dismounting method thereof

Technical Field

The invention relates to the technical field of gas bearing disassembly, in particular to a gas bearing disassembly device of a small-sized turbo expander and a disassembly method thereof.

Background

A small turboexpander is a high-speed rotating machine, wherein gas is used as a lubricant between bearing rotor systems, and the gas film gap reaches the order of microns and tens of microns. The precision of the bearing rotor system is required to be extremely high, and the clearance between the gas bearing and the movement of the small turboexpander is required to be extremely small, so that the parallelism is extremely high. Therefore, the bearing rotor system can be ensured to have good stability, and the small turboexpander can stably operate at high speed. In a small turboexpander, in order to ensure a stable pressure of a lubricating gas in a gas bearing and to ensure a sealing property of the small turboexpander, an O-ring seal is generally provided in an outer groove of the gas bearing.

Therefore, when the gas bearing needs to be detached from the movement of the small-sized turboexpander, because the clearance of only tens of micrometers is formed between the outer diameter of the gas bearing and the inner diameter of the movement, when the gas bearing is detached from the movement, if the parallelism of the bearing and the movement is not good, the jamming is very easy to occur; and the O-ring increases the damping effect during disassembly. Therefore, the gas bearing is difficult to disassemble from the movement, and if the gas bearing is failed, the disassembling operation is delayed, and even parts are damaged. There is a need for an apparatus and method that allows for smooth removal of the gas bearing from the cartridge of a small turboexpander.

Disclosure of Invention

The invention aims to provide a gas bearing dismounting device and a dismounting method thereof, wherein the gas bearing dismounting device can ensure that the end face of a gas bearing is uniformly stressed in the dismounting process, so that the gas bearing and the machine core of a small-sized turbine expander keep good parallelism, and the gas bearing can be smoothly dismounted from the machine core.

The invention provides a gas bearing dismounting device, which is used for dismounting a gas bearing from a movement of a small-sized turboexpander and comprises:

the support body is used for being connected with the movement; and

the disassembly module comprises a plurality of studs, tension plates, thrust bearings, a plurality of springs, a spring bin and a screw, the screw is provided with a wide head part positioned at the top of the spring bin and a connecting part which extends from the wide head part and penetrates through the spring bin and the tension plates, the connecting part is used for being connected with the gas bearing, the plurality of springs are sleeved on the corresponding studs, two ends of each spring are respectively propped against the tension plates and the spring bin, a rod body of the screw is connected with the support main body, and the tail end of the screw is connected with the tension plates through the thrust bearings;

when the screw rod is rotated to move upwards, the plurality of studs are driven by the tensile force of the gas bearing to drive the spring bin to compress the spring, the spring adaptively generates corresponding deformation according to the corresponding tensile force of the gas bearing to the corresponding studs and reacts on the tension plate, and the tension plate adaptively adjusts the tensile force applied to the end face of the gas bearing by the studs through the deformation generated by the spring adaptively, so that the end face of the gas bearing is uniformly stressed, and finally the gas bearing is smoothly detached from the movement.

In an embodiment of the invention, the number of the studs is three, the number of the springs is three, the tension plate has three circular holes for installing the corresponding studs, and the radius size of the three circular holes is larger than the inner diameter size of the gas bearing and is close to the outer diameter size of the gas bearing.

In an embodiment of the present invention, an outer side surface of the tension plate is spherical, that is, the tension plate is a spherical three-hole tension plate.

In an embodiment of the invention, the detaching module further includes a handle disposed at a top end of the screw, and the handle is configured to rotate to drive the screw to move upward.

In an embodiment of the present invention, the support body includes a base for connecting with the movement and a bracket connected and supported on the base, the bracket is provided with a threaded hole in threaded connection with a shaft of the screw, and the gas bearing detaching apparatus further includes a fastening nut sleeved on the screw and located on the bracket.

In an embodiment of the present invention, the base includes a circular base and three columns connected to the circular base, the base supports the bracket through the three columns, and the base is fixedly connected to the movement through bolts.

The invention also provides a disassembling method of the gas bearing disassembling device in another aspect, which comprises the following steps:

s1, connecting the base of the support main body with the movement;

s2, screwing a plurality of studs of the disassembly module into corresponding threaded holes of the gas bearing respectively; and

s3, a handle is rotated to drive a screw rod to move upwards, a plurality of studs drive a spring bin to compress springs under the pulling force of a gas bearing, the plurality of springs adaptively generate corresponding deformation according to the corresponding pulling force of the gas bearing on the corresponding studs and react on a tension plate, and the tension plate adaptively adjusts the pulling force applied by the studs on the end face of the gas bearing through the deformation generated by the springs adaptively, so that the end face of the gas bearing is uniformly stressed, and finally the gas bearing is smoothly detached from the movement.

In an embodiment of the present invention, in step S1, the base and the movement are fixedly connected by a bolt.

In an embodiment of the present invention, in the step S2, there are three studs; in step S3, the number of springs is three.

The gas bearing dismounting device can be connected with the machine core of the small-sized turbine expander, the gas bearing can be dismounted from the machine core, and the end face of the gas bearing can be uniformly stressed in the dismounting process, so that the gas bearing can keep good parallelism with the machine core and can be finally and smoothly dismounted from the machine core.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

Drawings

Fig. 1 is a schematic cross-sectional view of the gas bearing disassembly apparatus according to a preferred embodiment of the present invention.

Fig. 2 is a schematic structural view of the gas bearing removing apparatus according to the above preferred embodiment of the present invention, which illustrates a state in which the gas bearing removing apparatus is mounted to a core of a small turboexpander.

Fig. 3 is a plan view of the gas bearing removing apparatus shown in fig. 2.

The reference numbers indicate: the gas bearing disassembly apparatus 100; a base 1; a bracket 2; a stud 3; a tension plate 4; a thrust bearing 5; a spring 6; a spring chamber 7; a fastening nut 8; a screw 9; a handle 10; a nut 11; a gas bearing 12; a movement 13.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "vertical," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and simplicity in description, but do not indicate or imply that the device or component being referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus, the terms are not to be construed as limiting the invention.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The invention mainly aims to design a gas bearing dismounting device of a small-sized turbo expander, which can quickly and smoothly dismount a gas bearing from a machine core of the small-sized turbo expander. As shown in fig. 1 to 3, a detailed structure of the gas bearing disassembly apparatus 100 according to a preferred embodiment of the present invention is illustrated.

Specifically, the gas bearing removing apparatus 100 is used to remove the gas bearing 12 from the movement 13 of the small turboexpander, the gas bearing dismantling device 100 comprises a support body for connection with the cartridge 13 and a dismantling module, the disassembling module comprises a plurality of studs 3, a tension plate 4, a thrust bearing 5, a plurality of springs 6, a spring bin 7 and a screw 9, the screw 9 is provided with a wide head part positioned at the top of the spring bin 7 and a connecting part which extends from the wide head part and is arranged through the spring bin 7 and the tension plate 4, the connecting part is used for connecting with the gas bearing 12, a plurality of springs 6 are sleeved on the corresponding studs 3, two ends of each spring are respectively propped against the tension plate 4 and the spring bin 7, the shank of the screw 9 is connected to the support body and the end is connected to the tension plate 4 through the thrust bearing 5.

It can be understood that, when the screw 9 is rotated, the thrust bearing 5 makes the screw 9 freely rotate in the spring bin 7 and the tension plate 4, and the screw 9 can only move up and down under the constraint action of the support body, wherein when the screw 9 is rotated and moves up, the plurality of studs 3 drive the spring bin 7 to compress the spring 6 under the pulling force of the gas bearing 12, the spring 6 adaptively generates a corresponding deformation amount according to the corresponding pulling force of the gas bearing 12 on the corresponding stud 3 and reacts against the tension plate 4, the tension plate 4 adaptively adjusts the pulling force applied by the stud 3 on the end face of the gas bearing 12 through the deformation amount adaptively generated by the spring 6, so as to make the end face of the gas bearing 12 uniformly stressed, eventually, the gas bearing 12 is smoothly removed from the movement 13.

Specifically, in this preferred embodiment, there are three studs 3 and correspondingly three springs 6, and the specification and the type of the springs 6 must be selected, that is, the material, the stiffness coefficient, the length, the thickness and the like of the springs are ensured to be the same, so as to ensure the accuracy of the self-adaptive adjustment of the tension of the gas bearing 12.

It can be understood that three studs 3 are used to connect the gas bearing 12, if the gas bearing 12 is not parallel to the movement 13, different distances result in different tensile forces being transmitted to the three studs 3, the spring chamber 7 has different compression amounts to the corresponding spring 6, and the spring 6 can adaptively generate corresponding deformation amounts according to the different tensile forces, so as to feed back corresponding reaction forces to the tension plate 4, and finally, the tension plate 4 has adaptive adjustment forces on the gas bearing 12, so as to adjust the gas bearing 12 in place and smoothly detach the gas bearing 12 from the movement 13.

Correspondingly, the tension plate 4 is provided with three round holes for installing the corresponding studs 3, the radius sizes of the positions of the three round holes are larger than the inner diameter size of the gas bearing 12 and are close to the outer diameter size of the gas bearing 12, and the three round holes are adopted for installing the three studs 3 to play a stable role.

It should be understood that, in some embodiments of the present invention, the number of the circular holes of the stud 3, the spring 6 and the tension plate 4 may be other numbers, such as three or more, and the present invention is not limited thereto.

In particular, the outer side surface of the tension plate 4 is spherical, that is, the tension plate 4 is a spherical three-hole tension plate 4, so that the spherical three-hole tension plate 4 can freely rotate in multiple dimensions in the spring chamber 7 without radial displacement.

Further, the disassembling module further comprises a handle 10 arranged at the top end of the screw rod 9, and the handle 10 is used for rotating to drive the screw rod 9 to move upwards. The handle 10 can be in a straight-line shape, a cross shape or a polygonal structure, the shape of the handle 10 is not limited, and the handle 10 can be conveniently rotated to drive the screw rod 9 to rotate.

Further, the support main body comprises a base 1 used for being connected with the movement 13 and a support 2 connected and supported on the base 1, the support 2 is provided with a threaded hole in threaded connection with a rod body of the screw 9, the gas bearing disassembling device 100 further comprises a fastening nut 8, and the fastening nut 8 is sleeved on the screw 9 and located on the support 2.

Furthermore, the base 1 comprises a circular base and three columns connected to the circular base, the base 1 supports the bracket 2 through the three columns, the base 1 is in concave contact with the movement 13, and the base 1 and the movement 13 are fixedly connected through bolts, so that stable operability between the support body and the movement 13 is ensured.

The mounting process of the gas bearing dismounting device 100 is as follows: the gas bearing dismounting device 100 is based on the base 1, and assembles each part according to fig. 1, wherein the base 1 is fixed, and the support 2 is connected with the base 1 through bolts; the tension plate 4 is connected with the spring bin 7 through the three studs 3, the three springs 6 are respectively sleeved on the corresponding studs 3, and the screw rod 9 is limited in the tension plate 4 through the thrust bearing 5; the screw rod 9 is in threaded connection with the bracket 2 and the fastening nut 8; the screw 9 and the handle 10 are fixedly connected through a nut.

The working process of the gas bearing dismounting device 100 for dismounting the gas bearing 12 is as follows: assembling all parts of the gas bearing disassembly device 100 as required; the base 1 and the movement 13 are installed in place and fixed by bolts, and the three studs 3 are screwed into threaded holes of the gas bearing 12;

rotating the handle 10, wherein the handle 10 drives the screw 9 to rotate for 360 degrees; the screw 9 only moves up and down under the constraint action of the fastening nut 8 and the bracket 2; the screw rod 9 rotates in the spherical three-hole tension plate 4 to play a role of upward lifting force, and the spring bin 7 and the spherical three-hole tension plate 4 cannot rotate; three stud 3 feels the pulling force of gas bearing 12 drives spring storehouse 7 compresses three spring 6, spring 6 takes place different deformation volume, acts on tension plate 4 produces corresponding reaction force, tension plate 4 feels gas bearing 12 is dismantling the pulling force of in-process difference, makes in the spring storehouse 7 spring 6 has different deformation volume, finally makes spherical three hole tension plate 4 to gas bearing 12 has self-adaptation regulating energy power, will gas bearing 12 is followed smoothly the core 13 is dismantled out.

It is understood that the present invention also provides in another aspect a disassembling method of the gas bearing disassembling apparatus 100, including the steps of:

s1, connecting the base 1 of the support main body with the movement 13;

s2, screwing the studs 3 of the disassembly module into corresponding threaded holes of the gas bearing 12 respectively; and

s3, rotating the handle 10 to drive the screw 9 to move upward, driving the spring bin 7 to compress the springs 6 by the plurality of studs 3 under the pulling force of the gas bearing 12, adaptively generating corresponding deformation amounts by the plurality of springs 6 according to the corresponding pulling force of the gas bearing 12 on the corresponding studs 3, and reacting on the tension plate 4, adaptively adjusting the pulling force applied to the end face of the gas bearing 12 by the studs 3 by the tension plate 4 through the deformation amounts generated by the springs 6, so that the end face of the gas bearing 12 is uniformly stressed, and finally the gas bearing 12 is smoothly detached from the movement 13.

It should be noted that, in the step S1, the base 1 and the movement 13 are fixedly connected by a bolt.

It should be noted that, in step S2, there are three studs 3; correspondingly, in step S3, there are three springs 6.

In summary, the invention provides a gas bearing dismounting device and a dismounting method thereof, which can smoothly dismount a gas bearing from a machine core of a small-sized turbo expander.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only express preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A gas bearing removing apparatus for removing a gas bearing from a cartridge of a small turboexpander, comprising:

the support body is used for being connected with the movement; and

the disassembly module comprises a plurality of studs, tension plates, thrust bearings, a plurality of springs, a spring bin and a screw rod, wherein the screw rod is provided with a wide head part at the top of the spring bin and extends from the wide head part to penetrate through the spring bin and a connecting part of the tension plates, the connecting part is used for connecting and connecting the gas bearing, the spring sleeve is arranged on the stud and the two ends of the spring sleeve respectively support the tension plates and the spring bin, and a rod body of the screw rod is connected with the support main body and the tail end of the support main body through the thrust bearings and is connected with the tension plates.

2. The gas bearing disassembly apparatus of claim 1, wherein the number of the studs is three, the number of the springs is three, the tension plate has three circular holes for mounting the corresponding studs, and the three circular holes are located at a radial dimension greater than an inner diameter dimension of the gas bearing and close to an outer diameter dimension of the gas bearing.

3. The gas bearing disassembly apparatus of claim 2, wherein the outer side surface of the tension plate is spherical, i.e., the tension plate is a spherical three-hole tension plate.

4. The gas bearing disassembly apparatus of any of claims 1 to 3, wherein the disassembly module further comprises a handle disposed at a top end of the screw, the handle configured to drive the screw to rotate.

5. The gas bearing demounting device as claimed in any one of claims 1 to 3, wherein the support body includes a base for connection with the movement and a bracket connectively supported above the base, the bracket being provided with a threaded hole in threaded connection with the shank of the screw, the gas bearing demounting device further including a fastening nut sleeved on the screw and located above the bracket.

6. The gas bearing disassembly apparatus of claim 5, wherein the base comprises a circular base and three uprights connected to the circular base, the base supports the bracket through the three uprights, and the base and the movement are fixedly connected through bolts.

7. A disassembling method of a gas bearing disassembling apparatus according to any one of claims 1 to 6, characterized by comprising the steps of:

s1, connecting the base of the support main body with the movement;

s3, a handle is rotated to drive a screw rod to move upwards, a plurality of studs drive a spring bin to compress springs under the pulling force of a gas bearing, the springs generate corresponding deformation in a self-adaptive mode according to the corresponding pulling force of the gas bearing on the corresponding studs and react on a tension plate, the tension plate adjusts the pulling force applied to the end face of the gas bearing by the studs in a self-adaptive mode through the deformation generated by the springs in a self-adaptive mode, and therefore the end face of the gas bearing is stressed uniformly, and finally the gas bearing is detached from the machine core smoothly.

8. The gas bearing disassembly method of claim 7, wherein in the step S1, the base and the movement are fixedly connected by a bolt.

9. The gas bearing disassembly method of claim 7, wherein in the step S2, the number of the studs is three; in step S3, the number of springs is three.