CN114251176B

CN114251176B - Bolt mounting method and mounting top tool for compressor rotor

Info

Publication number: CN114251176B
Application number: CN202010993824.9A
Authority: CN
Inventors: 李艳开; 赵姝涵
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2023-01-17
Anticipated expiration: 2040-09-21
Also published as: CN114251176A

Abstract

A bolt mounting method for a compressor rotor comprises the steps that a plurality of bolts respectively penetrate through a plurality of mounting holes of a compressor drum and are placed on a radial plate of the drum; placing a plurality of lifters on the position, corresponding to the plurality of bolts, of the radial plate of the disc drum, pushing a plurality of cams of the plurality of lifters, and tightly jacking the plurality of bolts on the compressor disc drum; assembling the compressor disc drum; and operating a plurality of actuating parts of the plurality of lifters to drive the plurality of lifters to leave a radial plate of the first disk drum of the compressor. The invention also provides a bolt mounting jacking tool which comprises a support, a jacking block, a cam and an actuating part and can be applied to the bolt mounting method of the gas compressor rotor. The bolt installation method and the installation top tool of the compressor rotor can effectively realize bolt installation in a deep-cavity narrow different-surface space, improve the installation efficiency and reduce the process cost.

Description

Bolt mounting method and mounting top tool for compressor rotor

Technical Field

The invention mainly relates to engine assembly, in particular to a bolt mounting method and a mounting top tool for a compressor rotor.

Background

The high-pressure compressor rotor is an important component of an aircraft engine and consists of a plurality of stages of disk drums with disk center holes. As shown in fig. 1, the high-pressure compressor rotor 10 is composed of three stages of disc drums, namely a first disc drum 11, a second disc drum 12 and a third disc drum 13.

Wherein, the upper mounting edge of the first disk drum 11 contacts with the lower mounting edge of the second disk drum 12, and the first disk drum 11 is connected with the second disk drum 12 through a plurality of bolts 14; the third drum 13 includes a lower drum 131 and an upper drum 132, and the third drum 13 is connected to the second drum 120 via the lower drum 131.

As shown in fig. 1, the disc center diameter Φ of the high-pressure compressor rotor 10 assembled from three stages of disc drums is small, the distance a between the bolt mounting position and the disc center is large, the axial distance H2 between the adjacent disc drums is small, and the axial distance H1 between the bolt mounting position and the rear end face of the multi-stage disc drum of the rotor (i.e., the upper mounting edge of the upper disc drum 132 of the third disc drum 13) is large. On the basis, each stage of disk drum of the rotor is in an inverted cone shape, and the connecting position of the disk drum inner wall (such as the inner wall 113 of the first disk drum 11) and the disk drum spoke plate (such as the spoke plate 110 of the first disk drum 11) is provided with a fillet, so that the plane which can be reached by the bottoms of the bolts 14 is a fillet-type irregular plane, and belongs to a typical deep-cavity narrow different-plane space.

Under the process of conventional manual assembly, when a plurality of bolts are installed in the narrow different-surface space of the deep cavity, workers need to manually convey the bolts to the installation holes from the disc center and manually fix the bolts until the nuts are screwed down. However, the number of bolts to be installed is large, and the diameter phi of the disk center can only approximately meet the size of a space required by a worker when a forearm of the worker extends, so that the condition of the bottom surface of the bolt in the installation process is invisible, the difficulty in installing the bolt of the rotor of the gas compressor is high, the worker needs to keep the bolt in a fixed posture for a long time, the labor is extremely consumed, and the installation of a whole circle of bolts needs to be completed for a long time.

Disclosure of Invention

In order to solve the technical problems, the invention provides a bolt installation method of a compressor rotor, which is used for effectively realizing bolt installation in a deep-cavity narrow different-surface space, improving the installation efficiency and reducing the process cost. The bolt mounting method of the compressor rotor comprises the following steps: respectively penetrating a plurality of bolts through a plurality of mounting holes of a first disc drum of the compressor and placing the bolts on a radial plate of the first disc drum of the compressor; providing a plurality of lifters, placing the plurality of lifters on a web of the compressor first drum at positions corresponding to the plurality of bolts, each lifter comprising: the support is provided with a guide groove and an accommodating part communicated with the guide groove, the guide groove extends along a first direction, and the accommodating part is provided with an open side; the top block is slidably arranged in the guide groove; the cam is pivotally arranged in the accommodating part and is abutted against the top block, the cam is provided with a top part and a side part, a first distance is reserved between the top part and the axis of the cam, a second distance is reserved between the side part and the axis of the cam, and the first distance is greater than the second distance; and an actuating portion connected to the cam from the open side; pushing the cams of the lifters to enable the tops of the cams to abut against the ejector blocks to drive the ejector blocks to ascend, and tightly ejecting the bolts to the lower end face of the upper mounting edge of the first disc drum of the compressor; penetrating a plurality of mounting holes of a second disc drum of the compressor through the plurality of bolts, and screwing the plurality of nuts to finish the assembly of the second disc drum of the compressor; and operating a plurality of actuating portions of the plurality of lifters so that side portions of a plurality of cams of the plurality of lifters face the plurality of ejector blocks to drop the plurality of ejector blocks and drive the plurality of lifters to leave a web of the first disc drum of the compressor.

In an embodiment of the method for installing bolts on a compressor rotor according to the present invention, each of the lifters further includes a pin adapted to connect the support and the cam, and the pin drives the cam to rotate when the steps of pushing the cams of the plurality of lifters and operating the actuating portions of the plurality of lifters are performed.

In an embodiment of the method for installing bolts of a compressor rotor according to the present invention, the holder of each of the lifters further includes two pin shaft holes oppositely provided at both sides of the receiving portion, an axis of the pin shaft hole is perpendicular to the first direction, and when the steps of pushing the plurality of cams of the plurality of lifters and operating the plurality of actuating portions of the plurality of lifters are performed, the cams rotate along the axis of the pin shaft hole.

In an embodiment of the method for mounting bolts of a compressor rotor according to the present invention, each of the plurality of lifters further includes an anti-rotation pin adapted to pass through the cam and the pin shaft, the anti-rotation pin limiting rotation of the cam with respect to the pin shaft when the steps of pushing the plurality of cams of the plurality of lifters and operating the plurality of actuating portions of the plurality of lifters are performed.

In an embodiment of the bolt mounting method for the compressor rotor according to the present invention, the top block of each of the lifters has a saddle portion and a body portion, the saddle portion and the body portion form an inverted L-shape, and the length of the saddle portion is adapted to extend beyond the support in a direction perpendicular to the body portion, for abutting the bolts against the lower end surface of the upper mounting edge of the compressor first disk drum by contacting the saddle portion with the bottom portions of the bolts when performing the operation step of abutting the bolts against the lower end surface of the upper mounting edge of the compressor first disk drum.

In an embodiment of the method for installing bolts of the compressor rotor according to the present invention, after placing the plurality of bolts on the web plate of the compressor first drum and before placing the plurality of lifters on the web plate of the compressor first drum, the method further includes lifting the plurality of bolts upward in advance, respectively.

In an embodiment of the method of bolting a compressor rotor of the invention, the actuating portion comprises a flexible cable.

In an embodiment of the method for installing bolts in a compressor rotor according to the present invention, when the plurality of ejectors are placed at positions on the web plate of the compressor first drum corresponding to the plurality of bolts, the method further includes placing the plurality of actuating portions in the disk center holes of the compressor first drum so that the plurality of ejectors are pulled out of the disk cavities of the compressor first drum through the disk center holes of the compressor first drum after the plurality of ejectors are driven away from the web plate of the compressor first drum.

In an embodiment of the method for installing bolts on the compressor rotor according to the present invention, after completing the assembling of the second disk drum of the compressor and before operating the actuating portions of the plurality of lifters, the method further includes placing a third disk drum of the compressor on the second disk drum and completing the assembling of the third disk drum of the compressor.

In order to solve the above technical problem, another aspect of the present invention further provides a bolt mounting jacking device, including: the support is provided with a guide groove and an accommodating part communicated with the guide groove, the guide groove extends along a first direction, and the accommodating part is provided with an open side; the top block is slidably arranged in the guide groove; a cam having a top portion and a side portion, the top portion being a first distance from the cam axis, the side portion being a second distance from the cam axis, the first distance being greater than the second distance; and an actuating portion connected to the cam from the open side.

In an embodiment of the bolt mounting jacking device of the present invention, the bolt mounting jacking device further includes a pin adapted to connect the support and the cam and drive the cam to rotate.

In an embodiment of the installation jacking device for the bolt, the support further includes two pin shaft holes oppositely arranged at two sides of the accommodating portion, and an axis of each pin shaft hole is perpendicular to the first direction and is suitable for enabling the cam to rotate along the axis of each pin shaft hole when the pin shaft drives the cam to rotate.

In an embodiment of the installation top tool for a bolt of the present invention, the installation top tool further includes an anti-rotation pin adapted to pass through the cam and the pin shaft and limit rotation of the cam relative to the pin shaft.

In an embodiment of the installation top of the bolt of the present invention, the actuating portion includes a flexible cable.

In an embodiment of the bolt mounting plug of the present invention, the top block has a saddle portion and a body portion, the saddle portion and the body portion form an inverted L-shape, and the length of the saddle portion is adapted to extend beyond the support in a direction perpendicular to the body portion.

Compared with the prior art, the bolt mounting method and the bolt mounting top tool for the compressor rotor have the following beneficial effects:

the bolt is tightly jacked on the drum in advance through the jacking tool, the bolt placing process is visible, the situation that workers place the bolt in the blind cavity by hand feeling is avoided, and the energy consumption of the workers is greatly reduced;

moreover, the installation method is easy to operate, the installation jacking tool is simple in structure and low in production cost, the installation efficiency is improved, and the process cost is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the principle of the invention. In the drawings:

FIG. 1 is a schematic cross-sectional view of a compressor rotor;

FIG. 2 is a schematic flow chart of a method for installing bolts on a compressor rotor according to an embodiment of the invention;

FIG. 3 is a schematic diagram illustrating the effect of the bolt mounting method of the compressor rotor according to an embodiment of the present invention;

FIG. 4 is a schematic view of a partial cross-section of a compressor rotor during installation in accordance with a method of bolting according to one embodiment of the invention;

FIG. 5 is a schematic view of a partial cross-section of another installation of a method of bolting a compressor rotor according to an embodiment of the invention;

FIG. 6a is a schematic external view of a bolt mounting device according to an embodiment of the present invention;

fig. 6b is a schematic cross-sectional view of a bolt mounting head according to an embodiment of the present invention.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only examples or embodiments of the application, from which the application can also be applied to other similar scenarios without inventive effort for a person skilled in the art. Unless otherwise apparent from the context, or otherwise indicated, like reference numbers in the figures refer to the same structure or operation.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230," "upper surface," "above," and the like may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood, not simply by the actual terms used but by the meaning of each term lying within.

It will be understood that when an element is referred to as being "on," "connected to" or "contacting" another element, it can be directly on, connected or coupled to, or contacting the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly contacting" another element, there are no intervening elements present.

The embodiment of the invention provides a bolt mounting method of a compressor rotor, which can effectively realize bolt mounting in a narrow and non-coplanar space with a deep cavity, improve the mounting efficiency and reduce the process cost.

Fig. 2 is a flow chart of a method of installing bolts for a compressor rotor according to an embodiment of the present invention, and fig. 2 uses the flow chart to illustrate operations performed by a method 20 of installing bolts for a compressor rotor according to an embodiment of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, various steps may be processed in reverse order or simultaneously. At the same time, other operations are either added to or removed from these processes.

Fig. 3 is a schematic view showing the effect of the bolt mounting method of the compressor rotor according to the embodiment of the present invention. In order to more clearly show the top tool required by the bolt mounting method of the compressor rotor, fig. 3 is an enlarged view ofbase:Sub>A part of the compressor rotor shown in fig. 1, which is cut away, as shown inbase:Sub>A-base:Sub>A in fig. 1, specifically,base:Sub>A part between an upper mounting edge 111 andbase:Sub>A lower mounting edge 112 of the first disk drum 11 in fig. 1. Fig. 4 is a schematic view of a bolt mounting method for a compressor rotor according to an embodiment of the present invention. Fig. 5 is a schematic view of a bolt mounting method for a compressor rotor according to another embodiment of the present invention in a partial cross-section.

Fig. 6a and 6b are an external schematic view and a cross-sectional schematic view of a bolt mounting top 60 according to an embodiment of the present invention. A bolt mounting head shown in fig. 6a and 6b may be applied to a head used in a bolt mounting method of a compressor rotor according to an embodiment of the present invention shown in fig. 2, and therefore, a bolt mounting method of a compressor rotor according to an embodiment of the present invention will be described below with reference to fig. 6a and 6 b. In fig. 6a and 6b and fig. 2 to 5, the same reference numerals are used to designate the same components.

It should be understood that while the structure of a compressor rotor as shown in fig. 1 has been described above, in order to better understand the technical effects that can be achieved by the bolt mounting method of a compressor rotor according to the present invention, in fig. 2 to 5, the same reference numerals are used to designate the same structures as those shown in fig. 1.

A method for mounting bolts to a compressor rotor according to an embodiment of the present invention will be described with reference to fig. 2 to 6 b.

As shown in fig. 2, step 21 is to place bolts, and referring to fig. 3, step 21 is to insert a plurality of bolts 14 through a plurality of mounting holes 140 of the compressor first disk drum 11, respectively, and place them on the web 110 of the compressor first disk drum 11. It will be understood that reference numerals for other bolts and mounting holes are omitted in fig. 2, only one set of bolts 14 and mounting holes 140 being labeled, and that other unlabeled bolts and mounting holes all have the same structure.

Further, as shown in fig. 2, step 22 is to place a plurality of jacks 60, and referring to fig. 3, step 22 is to place a plurality of jacks 60 on the web 110 of the compressor first drum 11 at positions corresponding to the plurality of bolts 14.

For example, when a plurality of the jacks 60 are placed, the bolts at corresponding positions may be lifted upwards in advance by a certain distance to ensure that the jacks 60 can be placed on the web 110 of the compressor first drum 11 with sufficient space.

The following description will be made with reference to fig. 6a and 6b for a top tool required in a bolt mounting method for a compressor rotor according to an embodiment of the present invention shown in fig. 2.

As shown in fig. 6a, the top member 60 includes a support 61, and the support 61 has a guide groove 611 and a receiving portion 612 communicating with the guide groove 611. As shown in fig. 6b, the guiding groove 611 extends along the first direction a, and the accommodating portion 612 has an open side X.

As shown in fig. 6a, the top member 60 further includes a top block 62, and the top block 62 is slidably disposed in the guiding groove 611 and can slide in the guiding groove 611 along the first direction a and the opposite direction as shown in fig. 6 b.

As shown in fig. 6a, the top device 60 further includes a cam 63, and the cam 63 is pivotally disposed in the accommodating portion 612 and abuts against the top block 62. As shown in fig. 6b, the cam 63 has a top portion 633 and a side portion 634, the top portion 633 has a first distance 631 with the cam axis O, the side portion has a second distance 632 with the cam axis O, and the first distance 631 is greater than the second distance 632. When the cam 63 rotates in the accommodating portion 612, the top block 62, which abuts thereon, can slide in the guide groove 611 along the first direction a and the opposite direction.

As shown in fig. 6a, the lifting device 60 further comprises an actuating portion 64 connected to the cam 23 from the above-mentioned open side X. It is to be understood that the present invention is not limited to the manner in which the actuating portion 64 and cam 23 are connected, and may be connected, for example, by a latching arrangement of a protruding structure 640 with a circular hole disposed on the cam 23 as shown in fig. 6a and 6 b. Any selection and adjustment of the above-described connection means for the purpose of achieving the connection of the actuating portion and the cam of the present invention is within the spirit and scope of the present invention.

In the embodiment shown in fig. 6a and 6b, the lifting device 60 further comprises a pin 65, and the pin 65 is used for connecting the support 61 and the cam 63 and driving the cam 63 to rotate. Furthermore, the supporting base 61 of the top tool 60 shown in fig. 6a further includes two pin shaft holes oppositely arranged at two sides of the accommodating portion 612, namely, the connecting positions of the pin shafts 65 and the supporting base 61. It will be appreciated that reference numeral 65 in figure 6a represents a pin 65 disposed outside the support 61 through the pin hole. In order to keep the figures clear and tidy, no reference numerals are given to the two pin holes in fig. 6a and 6b, but it will be understood from the illustration of fig. 6a and 6b that the axes of the pin holes are perpendicular to the first direction a and the cam 63 rotates along the axis of the pin holes when the pin 65 rotates the cam 63.

In the embodiment shown in fig. 6a and 6b, the lifting tool 60 further comprises an anti-rotation pin 66 for passing through the cam 63 and the pin 64 to limit the rotation of the cam 63 relative to the pin 64.

In the embodiment shown in fig. 6a and 6b, the top block 62 has a stand portion 621 and a body portion 622, and as shown in fig. 6a, the stand portion 621 and the body portion 622 form an inverted L-shape, and the length of the stand portion 621 may extend beyond the support 61 in a direction perpendicular to the body portion 622.

Further, as shown in fig. 2, in step 23, the jacking cams are pushed to jack the bolts, and referring to fig. 3, the cams 63 of the jacks 60 are pushed, so that the respective tops 633 of the cams 63 abut against the respective jacking blocks 62 to drive the respective jacking blocks 62 to ascend along the respective sliding grooves 611, and thereby the bolts 14 are jacked on the lower end surface of the upper mounting edge 111 of the first disk drum 11 of the compressor.

As shown in fig. 6a and 6b, when the operation of pushing the cams 63 of the plurality of lifters 60 is performed in step 23, the pin 65 of each lifter 60 rotates each cam 63, each cam 63 rotates along the axis of the pin hole, and each rotation preventing pin 66 limits the rotation of each cam 63 relative to each corresponding pin 65.

Having described the reverse tapered structure of the drum 11 in the above background art, referring to fig. 4, the inner wall 113 of the first drum 11 is provided with a round corner at the connection with the web 110 of the first drum 11, thereby forming a narrow out-of-plane space. In the operation of abutting the plurality of bolts 14 against the lower end surface of the upper mounting edge of the compressor first disc drum 11 in step 23, the length of the saddle portion 621 of each of the ejector blocks 62 extends beyond each of the holders 61 in the direction perpendicular to each of the body portions 622, so that even in the above-described narrow irregular surface space, the saddle portion 621 of each of the ejectors 60 extending beyond each of the holders 61 can come into contact with the bottom portions of the corresponding plurality of bolts 14, thereby abutting the plurality of bolts 14 against the lower end surface of the upper mounting edge 111 of the compressor first disc drum 11.

Further, as shown in fig. 2, step 24 is to assemble the disc drum, and as shown in fig. 3, step 24 is to pass a plurality of mounting holes of the compressor second disc drum 12 through the plurality of bolts 14, respectively, and tighten a plurality of nuts necessary to match the plurality of bolts 14 to complete the assembly of the compressor second disc drum 12. It will be appreciated that the second drum 12 is not shown in fig. 3, and reference may be made to the schematic structural diagram of the second drum 12 after being assembled on the first drum 11 as shown in fig. 1 for better understanding of this step 24.

In an embodiment of the present invention, referring to fig. 1, after the assembling of the second disk drum 12 is completed, the assembling of the third disk drum 13 may be continued, so as to assemble a complete compressor rotor.

Finally, as shown in fig. 2, step 25 is to operate the ejector actuating portion to move the ejector away from the drum, and referring to fig. 6a and 6b, the actuating portion 64 may be pulled to make the side portion 634 of the cam 63 of each of the plurality of ejectors 60 face the corresponding ejector block 62 to drop the plurality of ejector blocks 62, and the plurality of ejectors 60 may be moved away from the web 110 of the compressor first drum 11 by pulling the actuating portion 64.

In an embodiment of the present invention, after pulling the actuating portion 64, the side portions 634 of the plurality of cams 63 may abut the top blocks 62 after the plurality of top blocks 62 are lowered.

As shown in fig. 6a and 6b, when a plurality of the lifters 60 are operated in step 25, the pin 65 of each lifter 60 rotates each cam 63 again, each cam 63 rotates again along the axis of the pin shaft hole, and each rotation-preventing pin 66 restricts the rotation of each cam 63 relative to each corresponding pin 65.

In one embodiment of the invention, the actuation portion 64 comprises a flexible cable.

Illustratively, as shown in fig. 3, the plurality of actuating portions 64 are disposed in the hub holes 114 of the compressor first drum 11, and after the plurality of ejectors 60 are pulled away from the web 110 of the compressor first drum 11 by pulling the actuating portions 64, the plurality of ejectors 60 may be further pulled out of the disc cavities of the compressor first drum 11 through the hub holes 114 of the compressor first drum 11, thereby completely detaching the assembled compressor rotor.

Referring to fig. 5, for example, in order to make it easier for a plurality of the ejectors 60 to be pulled out of the disc cavities of the first disc drum 11 after completing the assembly of the compressor rotor, the dimensions may be selected such that when the side portion 634 of the cam 63 of each ejector 60 faces the ejector block 62, the overall height of the ejector 60 is smaller than the axial distance H2 of the adjacent disc drum, so as to be pulled out of the disc cavities of the first disc drum 11 more easily under the traction of the actuating portion 64, but the invention is not limited thereto.

The bolt installation method of the compressor rotor can effectively realize bolt installation in a deep-cavity narrow different-surface space, greatly reduce the installation difficulty of workers for installing bolts, improve the installation efficiency and reduce the process cost.

The invention further provides a bolt mounting jacking tool which is suitable for the bolt mounting method of the compressor rotor, so that the purposes of improving the mounting efficiency and reducing the process cost are achieved together.

A bolt mounting head 60 of the present invention is shown in fig. 6a and 6 b.

As shown in fig. 6a, a bolt mounting head 60 of the present invention has a support 61, a top block 62, a cam 63 and an actuating portion 64. Wherein, the support 61 has a guiding groove 611 and a receiving portion 612 communicating with the guiding groove 611. As shown in fig. 6b, the guiding groove 611 extends along a first direction a, and the accommodating portion 612 has an open side X; the top block 62 is slidably disposed in the guide groove 611, and can slide along a first direction a and an opposite direction as shown in fig. 6 b; the cam 63 is pivotally disposed in the accommodating portion 612 and abuts against the top block 62, and the cam 63 has a top portion 633 and a side portion 634, a first distance 631 is between the top portion 633 and the cam axis O, a second distance 632 is between the side portion 634 and the cam axis O, and the first distance 631 is greater than the second distance 632; and an actuating part 64 connected to the cam 23 from the open side surface X.

In the embodiment shown in fig. 6a and 6b, the lifting device 60 further comprises a pin 65, and the pin 65 is used for connecting the support 61 and the cam 63 and driving the cam 63 to rotate. Furthermore, the support 61 of the lifting device 60 shown in fig. 6a further includes two pin shaft holes oppositely disposed at two sides of the accommodating portion 612, that is, where the pin shaft 65 is connected with the support 61. Although the pin holes are not identified in fig. 6a and 6b, with the structure shown in fig. 6a and 6b, the axis of the pin hole is perpendicular to the first direction a, and when the pin 65 rotates the cam 63, the cam 63 rotates along the axis of the pin hole.

In the embodiment shown in fig. 6a and 6b, the lifting device 60 further comprises an anti-rotation pin 66 for passing through the cam 63 and the pin 64 to limit the rotation of the cam 63 relative to the pin 64.

In the embodiment shown in fig. 6a and 6b, the top block 62 has a saddle portion 621 and a body portion 622, as shown in fig. 6a and 6b, the saddle portion 621 and the body portion 622 form an inverted L-shape, and the length of the saddle portion 621 may extend beyond the seat 61 in a direction perpendicular to the body portion 622.

For a better understanding of the structure of a bolt-mounted top tool of the present invention, the assembling manner of a bolt-mounted top tool of the present invention will be explained and explained below with reference to fig. 6a and 6 b. First, the cam 63 is fixed to the support 61 by the pin 65, and after aligning the pin hole, the rotation preventing pin 66 is installed, so that the cam 63 and the pin 64 are connected as a whole and do not rotate relatively. The top block 62 is then inserted into the guide groove 611 of the holder 61, and the actuating portion 64 is connected into the open side X of the cam 63.

Other details and methods related to the bolt mounting jacking device of the present invention may refer to the related descriptions in the bolt mounting method of the compressor rotor according to the embodiment of the present invention, and are not repeated herein.

Having thus described the basic concept, it should be apparent to those skilled in the art that the foregoing disclosure is by way of example only, and is not intended to limit the present application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, though not expressly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.

Also, this application uses specific language to describe embodiments of the application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means a feature, structure, or characteristic described in connection with at least one embodiment of the application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

Aspects of the present application may be embodied entirely in hardware, entirely in software (including firmware, resident software, micro-code, etc.) or in a combination of hardware and software. The above hardware or software may be referred to as "data block," module, "" engine, "" unit, "" component, "or" system. The processor may be one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital signal processing devices (DAPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, or a combination thereof. Furthermore, aspects of the present application may be represented as a computer product, including computer readable program code, embodied in one or more computer readable media. For example, computer-readable media can include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, magnetic tape \8230;), optical disks (e.g., compact disk CD, digital versatile disk DVD \8230;), smart cards, and flash memory devices (e.g., card, stick, key drive \8230;).

The computer-readable medium may comprise a propagated data signal with the computer program code embodied therein, for example, on a baseband or as part of a carrier wave. The propagated signal may take any of a variety of forms, including electromagnetic, optical, and the like, or any suitable combination. The computer readable medium can be any computer readable medium that can communicate, propagate, or transport the program for use by or in connection with an instruction execution system, apparatus, or device. Program code on a computer readable medium may be propagated over any suitable medium, including radio, electrical cable, fiber optic cable, radio frequency signals, or the like, or any combination of the preceding.

Similarly, it should be noted that in the preceding description of embodiments of the application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single disclosed embodiment.

Where numerals describing the number of components, attributes or the like are used in some embodiments, it is to be understood that such numerals used in the description of the embodiments are modified in some instances by the modifier "about", "approximately" or "substantially". Unless otherwise indicated, "about", "approximately" or "substantially" indicates that the number allows a variation of ± 20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximations that may vary depending upon the desired properties of the individual embodiments. In some embodiments, the numerical parameter should take into account the specified significant digits and employ a general digit preserving approach. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the range are approximations, in the specific examples, such numerical values are set forth as precisely as possible within the scope of the application.

Although the present application has been described with reference to the present specific embodiments, it will be appreciated by those skilled in the art that the above embodiments are merely illustrative of the present application and that various equivalent changes or substitutions may be made without departing from the spirit of the application, and therefore, it is intended that all changes and modifications to the above embodiments within the spirit of the application fall within the scope of the claims of the application.

Claims

1. The bolt mounting method of the compressor rotor is characterized by comprising the following steps of:

respectively penetrating a plurality of bolts through a plurality of mounting holes of a first disc drum of the compressor and placing the bolts on a radial plate of the first disc drum of the compressor;

providing a plurality of lifters, placing the plurality of lifters on a web of the compressor first drum at positions corresponding to the plurality of bolts, each lifter comprising:

the support is provided with a guide groove and an accommodating part communicated with the guide groove, the guide groove extends along a first direction, and the accommodating part is provided with an open side;

the top block is slidably arranged in the guide groove;

the cam is pivotally arranged in the accommodating part and is abutted against the top block, the cam is provided with a top part and a side part, a first distance is reserved between the top part and the axis of the cam, a second distance is reserved between the side part and the axis of the cam, and the first distance is greater than the second distance; and

an actuating portion connected to the cam from the open side;

pushing the cams of the lifters to enable the tops of the cams to abut against the ejector blocks to drive the ejector blocks to ascend, and tightly ejecting the bolts to the lower end face of the upper mounting edge of the first disc drum of the compressor;

penetrating a plurality of mounting holes of a second disc drum of the compressor through the plurality of bolts, and screwing a plurality of nuts to complete the assembly of the second disc drum of the compressor; and

and operating the actuating parts of the lifters to enable the side parts of the cams of the lifters to face the ejector blocks to enable the ejector blocks to fall down and drive the lifters to leave the radial plate of the first disk drum of the compressor.

2. The method of installing as claimed in claim 1, wherein each of said plurality of lifting devices further comprises a pin adapted to connect said support and said cam, said pin driving said cam in rotation when the steps of pushing said plurality of cams of said plurality of lifting devices and operating said plurality of actuating portions of said plurality of lifting devices are performed.

3. The mounting method according to claim 2, wherein the holder of each of the lifters further includes two pin shaft holes oppositely provided at both sides of the receiving portion, an axis of the pin shaft holes is perpendicular to the first direction, and when the steps of pushing the plurality of cams of the plurality of lifters and operating the plurality of actuating portions of the plurality of lifters are performed, the cams are rotated along the axis of the pin shaft holes.

4. The installation method according to claim 2 or 3, wherein each of said plurality of lifting tools further comprises an anti-rotation pin adapted to pass through said cam and said pin, said anti-rotation pin limiting the rotation of said cam with respect to said pin when the steps of pushing said plurality of cams of said plurality of lifting tools and operating said plurality of actuating portions of said plurality of lifting tools are performed.

5. The mounting method as set forth in claim 1, wherein the top block of each of the jacks has a saddle portion and a body portion, the saddle portion and the body portion constituting an inverted L-shape, and the length of the saddle portion being adapted to extend beyond the support in a direction perpendicular to the body portion for bringing the saddle portion into contact with the bottom portions of the plurality of bolts when performing the step of abutting the plurality of bolts against the lower end surface of the upper mounting rim of the compressor first disk drum, thereby abutting the plurality of bolts against the lower end surface of the upper mounting rim of the compressor first disk drum.

6. The method of installing as set forth in claim 1, further including pre-lifting each of a plurality of bolts upwardly after placing the plurality of bolts on the web of the compressor first disk drum and before placing the plurality of lifters on the web of the compressor first disk drum.

7. The installation method of claim 1, wherein the actuation portion comprises a flexible cable.

8. The method of installation according to claim 1 or 7, further comprising placing the plurality of actuators in the disc center holes of the compressor first disc drum when placing the plurality of ejectors in positions on the web of the compressor first disc drum corresponding to the plurality of bolts, such that the plurality of ejectors are pulled out of the disc cavities of the compressor first disc drum through the disc center holes of the compressor first disc drum after driving the plurality of ejectors away from the web of the compressor first disc drum.

9. The method of installation of claim 1, further comprising placing a compressor third disk drum on top of the second disk drum and completing assembly of the compressor third disk drum after completing assembly of the compressor second disk drum and before operating the actuating portions of the plurality of lifters.

10. An installation jacking tool of a bolt, comprising:

the top block is slidably arranged in the guide groove;

the cam is pivotally arranged in the accommodating part and is abutted against the top block, the cam is provided with a top part and a side part, a first distance is formed between the top part and the axis of the cam, a second distance is formed between the side part and the axis of the cam, and the first distance is greater than the second distance; and

an actuating portion connected to the cam from the open side.

11. The installation top tool of claim 10, further comprising a pin adapted to connect the support and the cam and drive the cam to rotate.

12. The installation top tool of claim 11, wherein the support further comprises two pin shaft holes oppositely arranged at two sides of the accommodating portion, and an axis of each pin shaft hole is perpendicular to the first direction and is suitable for enabling the cam to rotate along the axis of each pin shaft hole when the pin shaft drives the cam to rotate.

13. The installation top of claim 11 or 12, further comprising an anti-rotation pin adapted to pass through the cam and the pin and limit rotation of the cam relative to the pin.

14. The installation jack of claim 10, wherein the actuation portion comprises a flexible cable.

15. The mounting top of claim 10, wherein the top block has a pallet portion and a body portion, the pallet portion and the body portion forming an inverted L-shape, and the length of the pallet portion being adapted to extend beyond the pedestal in a direction perpendicular to the body portion.