阅读说明：本技术 一种适用于超高真空及强磁场条件下的光学镜调节机构 (Optical lens adjusting mechanism suitable for conditions of ultrahigh vacuum and strong magnetic field ) 是由 童云华 李�诚 肖昌祥 刘晓铭 于北乐 于 2021-09-01 设计创作，主要内容包括：本发明涉及磁约束受控核聚变研究技术领域,特别涉及一种适用于超高真空及强磁场条件下的光学镜调节机构,包括支撑板、径向旋转支撑座和牵引件,径向旋转支撑座上转动连接有一径向旋转轴,径向旋转轴的两端设有极向旋转支撑座,平面镜可转动的布置在极向旋转支撑座上；所述牵引件设置平面镜和极向旋转支撑座上,且该牵引件的上端向上延伸出天线腔体,并与设置在天线腔体上方的驱动机构连接,且在驱动机构的驱动下带动平面镜在极向上转动,或带动极向旋转支撑座使平面镜在径向上转动；本发明可适用于超高真空及强磁场环境下光学镜的调节需求,具有保持高真空的能力,并具有抵御强磁场环境的变化带来的电磁力对平面镜转向结构的影响。(The invention relates to the technical field of magnetic confinement controlled nuclear fusion research, in particular to an optical lens adjusting mechanism suitable for ultrahigh vacuum and high-intensity magnetic field conditions, which comprises a supporting plate, a radial rotary supporting seat and a traction piece, wherein the radial rotary supporting seat is rotatably connected with a radial rotary shaft, two ends of the radial rotary shaft are provided with polar rotary supporting seats, and a plane mirror is rotatably arranged on the polar rotary supporting seats; the traction part is arranged on the plane mirror and the polar direction rotating supporting seat, the upper end of the traction part extends upwards to form an antenna cavity and is connected with a driving mechanism arranged above the antenna cavity, and the plane mirror is driven to rotate in the polar direction under the driving of the driving mechanism or the polar direction rotating supporting seat is driven to rotate in the radial direction; the invention can be suitable for the adjustment requirement of the optical mirror under the environment of ultrahigh vacuum and strong magnetic field, has the capability of keeping high vacuum and can resist the influence of electromagnetic force on the plane mirror steering structure caused by the change of the environment of strong magnetic field.)

1. The utility model provides an optical lens adjustment mechanism suitable for under ultrahigh vacuum and the strong magnetic field condition for adjust level crossing (2) of setting in antenna cavity (1), its characterized in that, adjustment mechanism includes:

the antenna comprises a supporting plate (10) and a plurality of antenna elements, wherein the supporting plate is provided with two parallel and spaced antenna cavities (1);

the radial rotating support seats (20) are arranged at the lower ends of the two support plates (10), a radial rotating shaft (21) is rotatably connected onto the radial rotating support seats (20), polar rotating support seats (30) are respectively arranged at two ends of the radial rotating shaft (21), and the plane mirror (2) is rotatably arranged on the polar rotating support seats (30); and the number of the first and second groups,

draw piece (40), draw piece (40) setting on level crossing (2) and the utmost point that are located radial rotation axis (21) both ends to rotation support seat (30), and the upper end of this draw piece (40) upwards extends antenna cavity (1) to be connected with the actuating mechanism who sets up in antenna cavity (1) top, and drive level crossing (2) and rotate in the utmost point around its articulated shaft to rotation support seat (30) with the utmost point under actuating mechanism's drive, or drive the utmost point to rotation support seat (30) and make level crossing (2) at the radial direction rotation.

2. The adjusting mechanism for optical mirrors under ultrahigh vacuum and strong magnetic field conditions as claimed in claim 1, wherein said driving mechanism comprises:

a driving source (50) arranged above the antenna cavity (1) and used for providing power;

the vacuum welding corrugated pipe (60) is arranged above the antenna cavity (1) in a vertically extending mode, the upper end of the vacuum welding corrugated pipe (60) is fixedly assembled to the output end of the driving source (50) through a sealing copper ring (61) and a sealing blind flange (62), and the bottom end of the vacuum welding corrugated pipe (60) is fixedly assembled with the sealing blind flange (62) on the antenna cavity (1) through the sealing copper ring (61);

the upper end of the traction piece (40) is fixed on the inner side of the upper end of the vacuum welding corrugated pipe (60), and the vacuum welding corrugated pipe (60) is driven by the driving source to stretch and retract and the traction piece (40) is driven to ascend or descend.

3. The adjusting mechanism of optical lens suitable for ultra-high vacuum and strong magnetic field conditions as claimed in claim 2, wherein the driving source (50) is a driving motor, the side of the vacuum welding corrugated pipe (60) is provided with a supporting base (70) extending vertically, the side of the supporting base (70) is provided with an optical axis (80) extending vertically, the upper end of the optical axis (80) is fixed to the upper end of the supporting base (70) via an optical axis seat (81), and the bottom end of the optical axis (80) is fixed to the top of the antenna cavity (1) via the optical axis seat (81);

a screw rod (71) is rotatably arranged on the supporting seat (70), and the screw rod (71) is in transmission connection with an output shaft of the driving motor; a connecting plate (90) is in threaded connection with the rod body of the screw rod (71), one end of the connecting plate (90) is sleeved on the optical axis (80), and the other end of the connecting plate is fixed at the upper end of the vacuum welding corrugated pipe (60).

4. The adjusting mechanism for optical mirrors under ultrahigh vacuum and strong magnetic field conditions as claimed in claim 3, wherein the upper end of the screw rod (71) is mounted on the supporting base (70) via a bearing cover plate (711) and a bearing (712), and the bottom end is mounted on the top of the antenna cavity (1) via the bearing (712) and a supporting bottom plate (713).

5. The adjusting mechanism of optical lens suitable for ultra-high vacuum and strong magnetic field conditions as claimed in claim 3, wherein the lead screw (71) is fixed to the connecting plate (90) via a lead screw nut (714), and the connecting plate (90) is sleeved on the optical axis (80) via an optical axis bushing (91).

6. The adjusting mechanism of optical lens suitable for ultra-high vacuum and strong magnetic field condition as claimed in claim 2, wherein the upper end of the pulling member (40) passes through the protective sheath (101) disposed on the top of the antenna cavity (1) and extends to be fixed inside the upper end of the vacuum welding corrugated pipe (60).

7. The adjusting mechanism for optical mirrors under ultrahigh vacuum and high magnetic field conditions as claimed in claim 1, wherein two ends of the polar rotation support base (30) respectively extend to one side away from the radial rotation support base (20) to form polar rotation support blocks (31), two sides of the plane mirror (2) are respectively fixedly connected with the polar rotation member (201) through bolts, and then are sleeved on the polar rotation support blocks (31) at two ends of the polar rotation support base (30) together with the first bearing assembly (202).

8. The adjusting mechanism of optical lens suitable for ultra-high vacuum and strong magnetic field condition as claimed in claim 7, wherein the bottom end of the pulling member (40) is connected to the polar rotation support block (31) at one end of the polar rotation support base (30) by bolts;

preferably, the supporting plate (10) is provided with a limit shaft sleeve (11), and a traction piece (40) fixed on the polar rotation supporting block (31) and the plane mirror (2) passes through the limit shaft sleeve (11) and extends upwards.

9. The adjusting mechanism for optical lens under ultrahigh vacuum and strong magnetic field conditions as claimed in claim 1, wherein a pressing plate (22) is sleeved on the shaft body of the radial rotating shaft (21), and the pressing plate (22) is locked and fixed to the radial rotating support base (20) through bolts.

10. The adjusting mechanism for optical mirrors under ultrahigh vacuum and strong magnetic field conditions as claimed in claim 9, wherein the radial rotating shaft (21) is provided with washer sleeves (23) at both ends, the polar rotating support base (30) is fixed to the washer sleeves (23) via a second bearing assembly (32), and washers (24) are lockingly fixed to both sides by bolts.

Technical Field

The invention relates to the technical field of magnetic confinement controlled nuclear fusion research, in particular to an optical mirror adjusting mechanism suitable for conditions of ultrahigh vacuum and strong magnetic field.

Background

In the field of magnetic confinement controlled nuclear fusion research, Electron Cyclotron Resonance Heating (ECRH) is a heating method with a remarkable effect, and is widely applied to secondary heating to realize local heating of electrons. An ECRH system is used as a main heating mode in international Tokamak devices and international thermonuclear fusion experimental reactors.

In the ECRH system, the main functions of the antenna system comprise the emission of electron cyclotron waves and the coupling of electron cyclotron waves after specular reflection, and the direct microwave power deposition distribution and the driving current distribution are distributed, so the structural design of the antenna system is one of the important links of the whole high-power radio-frequency heating unit.

The antenna system in the ECRH system adopts a quasi-optical principle, and emits electron cyclotron waves to plasma in a designated area by using two groups of ellipsoidal mirrors and plane mirrors in a combined manner, so that the optimal effect of plasma heating is obtained. Considering that the ellipsoidal mirror mainly plays a focusing role, in order to realize that the electron cyclotron wave can be accurately emitted to different positions of a plasma region, a polar and annular adjusting and rotating mechanism needs to be added to the plane mirror. Therefore, multi-directional position adjustment for these optical elements is an important condition in antenna system design.

Aiming at the multidirectional position adjustment design of the plane mirror, the requirement of high vacuum protection must be met at the same time. Meanwhile, due to the size limitation of the antenna system and the requirement that the adjustment range of the plane mirror is large enough, in order to avoid interference in the antenna cavity, higher requirements are also put forward on the compactness of the structure in the design process. Since the conditions under which a person performs a direct contact operation to perform adjustment are limited under the environmental conditions of high vacuum and strong magnetic field, it is required to operate through an automation device, which imposes a requirement on the compatibility of remote operation of the product.

Disclosure of Invention

In view of the problems in the prior art, an object of the present invention is to provide an optical lens adjusting mechanism suitable for use under ultra-high vacuum and strong magnetic field conditions, so as to meet the requirement of electron cyclotron resonance heating.

In order to achieve the purpose, the invention adopts the following technical scheme:

an optical lens adjustment mechanism suitable for under ultrahigh vacuum and high magnetic field condition for adjust the level crossing of setting in the antenna cavity, adjustment mechanism includes:

the two supporting plates are arranged in the antenna cavity at intervals in parallel;

the radial rotating supporting seats are arranged at the lower ends of the two supporting plates, a radial rotating shaft is rotatably connected onto the radial rotating supporting seats, polar rotating supporting seats are respectively arranged at two ends of the radial rotating shaft, and the plane mirror is rotatably arranged on the polar rotating supporting seats; and the number of the first and second groups,

the traction part is arranged on the plane mirror and the polar direction rotating support seat which are positioned at two ends of the radial rotating shaft, the upper end of the traction part upwards extends out of the antenna cavity and is connected with a driving mechanism arranged above the antenna cavity, and the plane mirror is driven to rotate in the polar direction around a hinge shaft of the plane mirror and the polar direction rotating support seat under the driving of the driving mechanism or to rotate in the radial direction of the plane mirror.

In a further aspect, the drive mechanism includes:

the driving source is arranged above the antenna cavity and used for providing power;

the vacuum welding corrugated pipe is vertically arranged above the antenna cavity in an extending mode, the upper end of the vacuum welding corrugated pipe is fixedly assembled to the output end of the driving source through a sealing copper ring and a sealing blind flange, and the bottom end of the vacuum welding corrugated pipe is fixedly assembled to the sealing blind flange on the antenna cavity through the sealing copper ring;

the upper end of the traction piece is fixed on the inner side of the upper end of the vacuum welding corrugated pipe, and the vacuum welding corrugated pipe is driven by the driving source to stretch and contract and the traction piece is driven to ascend or descend.

In a further technical scheme, the driving source is a driving motor, a supporting seat which is vertically extended is arranged beside the vacuum welding corrugated pipe, an optical axis which is vertically extended is arranged beside the supporting seat, the upper end of the optical axis is fixed to the upper end of the supporting seat through an optical axis seat, and the bottom end of the optical axis is fixed to the top of the antenna cavity through the optical axis seat;

a screw rod is rotatably arranged on the supporting seat and is in transmission connection with an output shaft of the driving motor; and a connecting plate is in threaded connection with the rod body of the screw rod, one end of the connecting plate is sleeved on the optical axis, and the other end of the connecting plate is fixed at the upper end of the vacuum welding corrugated pipe.

In a further technical scheme, the upper end of the lead screw is installed on the supporting seat through a bearing cover plate and a bearing, and the bottom end of the lead screw is installed at the top of the antenna cavity through the bearing and a supporting bottom plate.

In a further technical scheme, the lead screw is fixed on the connecting plate through a lead screw nut, and the connecting plate is sleeved on the optical axis through an optical axis bushing.

In a further technical scheme, the upper end of the traction piece penetrates through a protective sleeve arranged at the top of the antenna cavity and extends to be fixed to the inner side of the upper end of the vacuum welding corrugated pipe.

In a further technical scheme, two ends of the polar rotation support seat respectively extend to one side far away from the radial rotation support seat to form polar rotation support blocks, two sides of the plane mirror are respectively fixedly connected with the polar rotation piece through bolts, and then the plane mirror and the first bearing assembly are sleeved on the polar rotation support blocks at two ends of the polar rotation support seat together.

In a further technical scheme, the bottom end of the traction piece is connected to a polar rotation supporting block at one end of the polar rotation supporting seat through a bolt.

In a further technical scheme, a limit shaft sleeve is arranged on the supporting plate, and a traction piece fixed on the polar rotation supporting block and the plane mirror penetrates through the limit shaft sleeve and then extends upwards.

In a further technical scheme, a pressing plate is sleeved on a shaft body of the radial rotating shaft and is fixed to the radial rotating supporting seat through a bolt lock.

In a further technical scheme, the two ends of the radial rotating shaft are provided with gasket sleeves, the polar rotating support seat is fixed to the gasket sleeves through a second bearing assembly, and the gaskets are locked and fixed to the two sides through bolts.

Compared with the prior art, the invention has the following technical effects:

1. the optical mirror adjusting mechanism provided by the invention can meet the adjusting requirement of the optical mirror under the environment of ultrahigh vacuum and strong magnetic field, has the capability of keeping high vacuum, and can resist the influence of electromagnetic force on a plane mirror steering structure caused by the change of the environment of strong magnetic field;

2. according to the optical mirror adjusting mechanism provided by the invention, the plane mirror and the polar direction rotating support seat are connected through the traction piece, namely different mounting points of the traction piece are used for converting the rotation of the plane mirror into the up-and-down movement of the traction piece, and the up-and-down reciprocating movement of the traction piece is completed by combining the deformation adaptability of the vacuum welding corrugated pipe; the requirements of driving the multiple groups of plane mirrors to rotate and adjust in multiple directions are met by adopting the pulling of the multiple groups of traction pieces;

3. in the field of future magnetic confinement controlled nuclear fusion research, the structural design can be developed towards compactness, the space reserved for an electron cyclotron resonance heating antenna part is smaller and smaller, the optical mirror adjusting mechanism provided by the invention adopts the simplest traction piece pulling structure in the mechanism design process, and the optical mirror adjusting mechanism has great advantages in spatial arrangement.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

FIG. 1 is a cross-sectional view of an optical lens adjusting mechanism suitable for use under ultra-high vacuum and high magnetic field conditions, according to an embodiment of the present invention;

FIG. 2 is a schematic view showing the construction of a driving mechanism according to the present invention;

FIG. 3 is a schematic diagram of the components of the present invention that rotate the flat mirrors;

FIG. 4 is a schematic diagram of the components of the present invention that rotate the plane mirror in polar directions;

FIG. 5 is a schematic view of the components of the present invention that rotate the flat mirrors in a radial direction;

the reference numbers in the figures illustrate: 1. an antenna cavity; 101. a protective sleeve; 2. a plane mirror; 201. a polar rotating member; 202. a first bearing assembly; 10. a support plate; 11. a limiting shaft sleeve; 20. radially rotating the supporting seat; 21. a radial rotation axis; 22. pressing a plate; 23. a washer sleeve; 24. a gasket; 30. polar direction rotating the supporting seat; 31. polar rotation support block; 32. a second bearing assembly; 40. a traction member; 50. a drive source; 60. vacuum welding the corrugated pipe; 61. sealing the copper ring; 62. sealing the blind flange; 70. a supporting seat; 71. a screw rod; 711. a bearing cover plate; 712. a bearing; 713. a support base plate; 714. a feed screw nut; 80. an optical axis; 81. a light axis seat; 90. a connecting plate; 91. optical axis bush.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further clarified by combining the specific drawings.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As described above, referring to fig. 1 and 3, the present invention provides an optical mirror adjusting mechanism suitable for use under ultra-high vacuum and high magnetic field conditions, for adjusting a plane mirror 2 disposed in an antenna cavity 1, wherein the adjusting mechanism includes a support plate 10, a radial rotation support 20 and a traction member 40;

the support plate 10 is provided with two parallel and spaced antenna cavities 1; specifically, the two ends of the two support plates 10 are provided with mounting plates, which are fastened to the inner side wall of the antenna cavity 1 by bolt locks.

The radial rotary supporting seats 20 are arranged at the lower ends of the two supporting plates 10, a radial rotary shaft 21 is rotatably connected to the radial rotary supporting seats 20, two ends of the radial rotary shaft 21 are respectively provided with a polar rotary supporting seat 30, and the plane mirror 2 is rotatably arranged on the polar rotary supporting seats 30;

the traction part 40 is arranged on the plane mirror 2 and the polar direction rotation support seat 30 which are positioned at two ends of the radial rotation shaft 21, the upper end of the traction part 40 extends upwards to form the antenna cavity 1 and is connected with a driving mechanism arranged above the antenna cavity 1, and the plane mirror 2 is driven by the driving mechanism to rotate in the polar direction around a hinge shaft of the plane mirror 2 and the polar direction rotation support seat 30, or the polar direction rotation support seat 30 is driven to enable the plane mirror 2 to rotate in the radial direction.

In the invention, the traction element 40 can specifically adopt a steel wire rope; in addition, because the antenna is in a high vacuum and strong magnetic field environment, relevant parts arranged in the antenna cavity 1 to drive the plane mirror 2 to rotate all need to be made of nonmagnetic materials, such as 304 aluminum, 6061 aluminum and copper.

In the field, considering that the plane mirrors in the antenna cavity 1 are generally two symmetrical group of plane mirrors 2, by disposing the radial rotation axis 21 between the two group of plane mirrors 2 and disposing the polar rotation support bases 30 at both ends of the radial rotation axis 21, the two group of plane mirrors 2 are correspondingly disposed on the polar rotation support bases 30 at both ends of the radial rotation axis 21, and then the plane mirrors 2 and the polar rotation support bases 30 are respectively connected with the traction members 40, so as to convert the rotation of the plane mirrors 2 in the radial direction and the polar direction into the vertical movement of the traction members 40. Specifically, the plane mirror 2 is directly pulled to realize the rotation in the polar direction by moving the traction piece 40 up and down, or the plane mirror 2 is rotated in the radial direction by pulling the polar direction rotating support base 30, so that the operation is simple and convenient; in addition, the plurality of traction pieces 40 are arranged, so that the rotation of the two groups of plane mirrors 2 is not influenced mutually.

Further, according to the present invention, the driving mechanism includes a driving source 50 and a vacuum welding bellows 60, the driving source 50 is disposed above the antenna chamber 1 for providing power; the vacuum welding corrugated pipe 60 is vertically arranged above the antenna cavity 1 in an extending manner, the upper end of the vacuum welding corrugated pipe 60 is fixedly assembled to the output end of the driving source 50 through a copper sealing ring 61 and a blind sealing flange 62, and the bottom end of the vacuum welding corrugated pipe 60 is fixedly assembled to the blind sealing flange 62 on the antenna cavity 1 through a copper sealing ring 61;

through the installation structure, the vacuum welding corrugated pipe 60 communicated with the inside of the antenna cavity 1 can meet the vacuum condition, wherein the upper end of the traction piece 40 is fixed on the inner side of the upper end of the vacuum welding corrugated pipe 60, and the vacuum welding corrugated pipe 60 is driven by the driving source to stretch and contract and the traction piece 40 is driven to ascend or descend.

Further, in the present invention, the driving source 50 is a driving motor, a supporting seat 70 extending vertically is disposed beside the vacuum welding corrugated tube 60, an optical axis 80 extending vertically is disposed beside the supporting seat 70, an upper end of the optical axis 80 is fixed to an upper end of the supporting seat 70 via an optical axis seat 81, and a bottom end of the optical axis 80 is fixed to a top of the antenna cavity 1 via the optical axis seat 81;

a screw rod 71 is rotatably arranged on the support seat 70, the screw rod 71 is in transmission connection with an output shaft of the driving motor, and specifically, the driving motor is concentrically connected to the screw rod 71 through a coupler. A connecting plate 90 is connected to the shaft body of the screw rod 71 in a threaded manner, one end of the connecting plate 90 is sleeved on the optical axis 80, and the other end of the connecting plate is fixed to the upper end of the vacuum welding corrugated pipe 60.

In the invention, the screw rod 71 in transmission connection with the driving motor is used for driving the vacuum welding corrugated pipe 60 to extend and retract in the axial direction, so as to drive the traction piece 40 arranged on the inner side of the upper end of the screw rod to move up and down, no special vacuum requirement exists for the screw rod 71 and the optical axis 80 matched with the screw rod 71, and the screw rod optical axis assembly is integrally assembled with the driving motor and then arranged on the top of the antenna cavity 1, particularly on a backboard connecting plate of the antenna cavity 1 in consideration of the installation and later maintenance of the screw rod optical axis assembly.

In the present invention, as shown in fig. 2, the upper end of the lead screw 71 is mounted on the support base 70 via the bearing cover 711 and the bearing 712, and the bottom end is mounted on the top of the antenna cavity 1 via the bearing 712 and the support bottom plate 713.

In the present invention, the lead screw 71 is fixed to the connecting plate 90 via a lead screw nut 714, and the connecting plate 90 is sleeved on the optical axis 80 via an optical axis bushing 91.

In the present invention, the center line of the lead screw 71, the center line of the optical axis 80, and the center line of the vacuum welding bellows 60 are parallel to each other and on the same plane.

In the present invention, the upper end of the pulling member 40 passes through the protective sheath 101 disposed on the top of the antenna chamber 1 and extends and is fixed to the inner side of the upper end of the vacuum welding bellows 60.

According to the present invention, as shown in fig. 4, in the present invention, two ends of the polar rotation support base 30 respectively extend to one side away from the radial rotation support base 20 to form polar rotation support blocks 31, two sides of the plane mirror 2 are respectively fixedly connected to the polar rotation members 201 through bolts, and then are sleeved on the polar rotation support blocks 31 at two ends of the polar rotation support base 30 together with the first bearing assembly 202.

Further, the bottom end of the pulling member 40 is connected to the polar rotation supporting block 31 at one end of the polar rotation supporting seat 30 by a bolt.

The supporting plate 10 is provided with a limiting shaft sleeve 11, and a traction piece 40 fixed on the polar rotation supporting block 31 and the plane mirror 2 extends upwards after penetrating through the limiting shaft sleeve 11.

According to the invention, as shown in fig. 5, a pressing plate 22 is sleeved on the shaft body of the radial rotating shaft 21, and the pressing plate 22 is locked and fixed to the radial rotating support base 20 through bolts. The radial rotary shaft 21 is provided at both ends thereof with washer sleeves 23, and the polar rotary support base 30 is fixed to the washer sleeves 23 via second bearing units 32, and washers 24 are lockingly fixed to both sides by bolts.

Through above-mentioned mounting structure, the effectual radial rotation axle 21 that has prevented takes place the not hard up problem of axial in the shaft hole of radial rotation supporting seat 20, has improved the stability of equipment use.

In the invention, the optical lens adjusting mechanism is also provided with a remote operation interface, so that the operation process of the optical lens adjusting mechanism can be operated by remote control equipment. The optical lens adjusting mechanism provided by the invention belongs to mechanical products in the nuclear industry application environment generally, has the functions of multidirectional adjustment and remote operation, and can be used for multidirectional position adjustment of parts under the vacuum isolation condition in the general industry.

The foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.