CN209868429U - Nut force limiting tool - Google Patents
Nut force limiting tool Download PDFInfo
- Publication number
- CN209868429U CN209868429U CN201920657171.XU CN201920657171U CN209868429U CN 209868429 U CN209868429 U CN 209868429U CN 201920657171 U CN201920657171 U CN 201920657171U CN 209868429 U CN209868429 U CN 209868429U
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- nut
- supporting seat
- wrench head
- locking plate
- force
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Abstract
An object of the utility model is to provide a nut limit for force frock, its assembly efficiency that can effectively improve gland nut. The nut force limiting tool for achieving the purpose comprises a wrench head and a supporting seat, wherein one end of the wrench head is provided with a wrench head clamping jaw and an identification device, the wrench head clamping jaw is used for being in butt joint with a clamping groove in the end face of the compression nut to transmit torque, and the other end of the wrench head clamping jaw is provided with a transfer hole of a torque multiplier. The circumference of the supporting seat is provided with an observation window, one end of the supporting seat is used for fixing the outer sleeve on the periphery of the hollow shaft, and the other end of the supporting seat is arranged as a supporting base of the spanner head. When the compression nut is screwed, the supporting seat is fixed on the periphery of the hollow shaft, the spanner head is inserted into the supporting seat, the clamping jaw at the spanner head is in butt joint with the clamping groove at the end face of the compression nut, and the recognition device is aligned with the notch at the end face of the compression nut; through the observation window, the locking plate clamping jaw arranged on the locking plate and the identification device can be observed.
Description
Technical Field
The utility model relates to a nut limit for force frock.
Background
The high-pressure and low-pressure rotors of an engine are one of the important parts of an aircraft engine. As shown in fig. 1, an adapter shaft 7 of a low-pressure and high-pressure rotor of an aircraft engine is fixed in a journal bore 9 of the rotor by a compression nut 8. Because the high-pressure rotor of the engine is long and limited by space, horizontal assembly is required. The tightening torque of the compression nut 8 is between 600 and 900N.m, the torque is large, and the auxiliary tightening needs to be carried out by means of a torque multiplier in the tightening process.
After the compression nut 8 is screwed up, the compression nut 8 needs to be prevented from loosening. The conventional anti-loosening operation is performed by a locking piece 81 as shown in fig. 1. The locking plate 81 is installed in the shaft groove of the turbine shaft, a clamping groove is formed in the end face of the compression nut 8 corresponding to the locking plate 81, the compression nut 8 is prevented from being loosened in a mode that the locking plate 81 is bent and clamped into the clamping groove, therefore, in the force limiting process of the compression nut 81, the locking plate 81 needs to be aligned with the notch of the clamping groove in the end face of the compression nut 8, and the locking plate 81 is clamped into the clamping groove in the subsequent process.
However, the inventor finds that, in the existing nut force-limiting tool, the relative position of the locking plate 81 and the notch of the clamping groove on the end surface of the compression nut 8 cannot be directly identified in the force-limiting process of the compression nut 8, and the two conditions which must be met when the nut is screwed down are that the locking plate 81 is aligned with the notch of the clamping groove on the end surface of the compression nut 8 and the screwing torque is within the range of 600 + 900n.m, so that after the force-limiting tool needs to be removed, whether the locking plate 81 is aligned with the notch can be observed and wiped, the times of assembling and disassembling of the repeated tool are increased, and the assembling efficiency is.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a nut limit for force frock, its assembly efficiency that can effectively improve gland nut.
For realizing the nut limit for force frock of aforementioned purpose for in screwing the hollow shaft with gland nut to compress tightly the flange limit of a root axis on the downthehole flange of this hollow shaft inside, the axial trough of hollow shaft is provided with and is used for locking plate, locking plate has the locking plate jack catch, gland nut's terminal surface is provided with the notch that is used for the locking plate jack catch of impressing, and this nut limit for force frock includes:
the wrench head is a hollow cylinder, one end of the wrench head is provided with a wrench head clamping jaw and an identification device, the wrench head clamping jaw is used for being in butt joint with a clamping groove on the end face of the compression nut so as to transmit torque, and the other end of the wrench head is provided with a switching hole of the torque multiplier;
the supporting seat is a hollow sleeve, an observation window is arranged in the circumferential direction of the cylinder body, one end of the supporting seat is used for fixing the outer sleeve on the periphery of the hollow shaft, and the other end of the supporting seat is arranged as a supporting base of the wrench head;
when the compression nut is screwed down, the supporting seat is fixed on the periphery of the hollow shaft, the spanner head is inserted into the supporting seat, the clamping jaw of the spanner head is in butt joint with the clamping groove of the end face of the compression nut, the identification device is aligned with the notch, and the other end of the spanner head is supported by the supporting foundation; through the observation window, the locking plate clamping jaw arranged on the locking plate and the identification device can be observed.
In one or more embodiments, the one end of the support base has an internal thread for threaded connection with an outer circumference of the hollow shaft.
In one or more embodiments, the identification device is a notch.
In one or more embodiments, the supporting seat is provided with two observation windows at intervals on the circumference of the barrel body.
In one or more embodiments, the inner hole of the other end of the supporting seat is in clearance fit with the other end of the spanner head, and the fit clearance is 0.05-0.1 mm.
In one or more embodiments, the other end of the wrench head has a circumferential flange that is a clearance fit with the internal bore of the support seat.
In one or more embodiments, the other end of the support seat is provided with a stopper hole on an outer circumference for disposing an anti-torque stopper of a torque multiplier.
In one or more embodiments, the support seat is provided with a plurality of stopper holes in a circumferential direction on an end surface of the other end.
The beneficial effects of the utility model reside in that:
through setting up observation window in the frock for can observe the inside visualization of realization frock under the condition of not demolising nut limit force frock, thereby the operator is at the limit force in-process to gland nut 8, can guarantee to screw up under the condition of moment 600 in the standard range of adding food 900N.m, align the notch of draw-in groove and locking plate's locking plate jack catch on the gland nut terminal surface, the reliability and the degree of accuracy of gland nut assembly have been improved, gland nut's assembly efficiency has been promoted simultaneously.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a prior art high pressure rotor nut locking arrangement;
FIG. 2 is a schematic cross-sectional view of the nut force limiting tool in an assembled state;
FIG. 3 illustrates a perspective view of one embodiment of a nut force limiting tool;
fig. 4 shows an exploded view of the nut force limiting tool.
Detailed Description
The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and are not intended to limit the scope of the present invention. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.
It should be noted that, where used, the following description of upper, lower, left, right, front, rear, top, bottom, positive, negative, clockwise, and counterclockwise are used for convenience only and do not imply any particular fixed orientation. In fact, they are used to reflect the relative position and/or orientation between the various parts of the object.
Fig. 2 is a schematic sectional view of the nut force-limiting tool in an assembled state, in which the compression nut 8 is screwed in the hollow shaft 2 by the nut force-limiting tool 1 and is pressed against the flange 20 in the bore inside the hollow shaft 2 from a flange edge 30 of the shaft 3 assembled therewith. A locking plate 22 for preventing loosening is provided in the axial groove 21 of the hollow shaft 2, the locking plate 22 has a plate claw (not shown), and correspondingly, a notch (not shown) into which the plate claw can be pressed is provided on the end surface of the gland nut 8, and the gland nut 8 is prevented from loosening by press-bending the locking plate 22 and clamping the locking plate into the clamping groove (not shown) on the end surface of the gland nut 8.
Fig. 3 shows a perspective view of one embodiment of the nut force limiting tool, and fig. 4 shows an exploded view of the nut force limiting tool. The nut force limiting tool 1 comprises a wrench head 10 and a supporting seat 11.
The wrench head 10 is in the form of a hollow cylinder provided at one end with wrench head jaws 100 and identification means 101 and at the other end with an adapter hole 102 for connection of the torque multiplier 4. The wrench head jaws 100 are capable of interfacing with end surface slots (not shown) of the compression nut 8 and transmitting torque to drive the compression nut 8 to rotate together when the wrench head 10 is rotated. The torque multiplier 4 is connected with the wrench head 10 through the transfer hole 102, in the process of limiting the force of the compression nut 8, after the compression nut 8 is aligned through the wrench head 10, the compression nut 8 is screwed through rotating the torque multiplier 4, a screwing wrench 5 is further arranged at the end part of the torque multiplier 4, the torque generated by rotating the screwing wrench 5 is transmitted to the compression nut 8 through the torque multiplier 4, and the screwing torque of the compression nut 8 is ensured to be within the standard range of 600 plus 900 N.m.
The support base 11 is a hollow sleeve, one end of which is fixed on the hollow shaft 2 by being externally sleeved on the outer peripheral side of the hollow shaft 2, and the other end of which is used for supporting the wrench head 10. An observation window 110 is arranged on the circumference of the barrel body of the supporting seat 11 so as to realize the visualization of the inside of the tool in the screwing process.
When the compression nut 8 is tightened, the support seat 11 is fixed to the outer peripheral side of the hollow shaft 2, and the spanner head 10 is inserted into and supported by the support seat 11. At this time, the wrench head jaws 100 are abutted against the engaging grooves (not shown) on the end surface of the gland nut 8, the identification device 101 is aligned with the notches (not shown), and the locking plate jaws of the locking plate 22 and the identification device 101 can be observed through the observation window 110 in the force limiting process of the nut force limiting tool 1.
Through setting up observation window 110, can observe the inside visualization of realization frock under the condition of not demolising nut limit force frock 1 to the operator is at the limit force in-process to gland nut 8, can guarantee to screw up under the condition of moment in 600 supplyes 900 N.m's standard range, align the notch of draw-in groove and locking plate 22's locking plate jack catch on gland nut 8 terminal surface, the reliability and the degree of accuracy of gland nut 8 assembly have been improved, the assembly efficiency of gland nut 8 has been promoted simultaneously.
While one embodiment of the present nut force limiting tool is described above, in other embodiments of the present nut force limiting tool, the nut force limiting tool and its components may have more details in many respects than the embodiments described above, and at least some of these details may vary widely. At least some of these details and variations are described below in several embodiments.
Referring to fig. 3, in an embodiment of the nut force-limiting tool, an internal thread is disposed at one end of the supporting seat 11 fixed to the hollow shaft 2, and an external thread is disposed at one end of the hollow shaft 2 connected to the supporting seat 11, and the supporting seat 11 and the hollow shaft 2 are connected to each other by the internal thread and the external thread in a matching manner. In other embodiments of the nut force-limiting tool, the hollow shaft 2 and the supporting seat 11 may also be connected in a snap fit or a key-groove fit manner.
With continued reference to fig. 4, in one embodiment of the nut force limiting tool, the identification device 101 on the wrench head 10 is a notch disposed on an end surface of the wrench head 10, and the notch identifies the position of the notch on the compression nut 8. In other embodiments, the identification device 101 of the wrench head 10 may be a mark provided on the barrel of the wrench head 10, such as a marking hole or a mark made by using a marker pen.
In one embodiment of the nut force limiting tool, two locking pieces 22 for pressing in end face notches of the compression nut 8 are arranged in a shaft groove 21 of the hollow shaft 2, and correspondingly, two observation windows 110 are arranged on the circumference of the barrel body of the supporting seat 11 at intervals.
In one embodiment of the nut force-limiting tool, the inner hole 111 of the support seat 11 at the end where the support plate hand 10 is located is in clearance fit with the outer peripheral side of the supported end of the wrench head 10, and the fit clearance is 0.05 to 0.1 mm. Specifically, the outer periphery of the supported end of the spanner head 10 is provided with a circumferential flange 103, and the circumferential flange 103 is in clearance fit with the inner hole 111, so that the consistency of the axes of the spanner head 10 and the compression nut 8 is ensured, and the stability of torque output is improved.
In one embodiment of the nut force limiting tool, a stopper hole 112 is provided on the outer periphery of the end of the support base 11 where the support plate hand 10 is located, and the anti-torque stopper 41 of the torque multiplier 4 is provided in the stopper hole 112. In one embodiment, the stop lever holes 112 are provided in a plurality along the circumferential direction on the end surface of the support base 11 where the hand 10 is supported. After the torque multiplier 4 is connected to the wrench head 10 through the coupling hole 102, the anti-torque bar 41 is inserted into the bar hole 112 corresponding to the tail bar 42 of the torque multiplier 4, so that the rotation of the tail bar 42 of the torque multiplier 4 can be limited at the corresponding position during the force limiting process of the compression nut 8, thereby limiting the rotation direction of the torque multiplier 4.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention, all without departing from the content of the technical solution of the present invention, fall within the scope of protection defined by the claims of the present invention.
Claims (8)
1. The utility model provides a nut limit for force frock for in screwing the hollow shaft with gland nut to compress tightly the flange limit of a root axis on the downthehole flange of this hollow shaft inside, the axial trough of hollow shaft is provided with and is used for locking plate, locking plate has the locking plate jack catch, gland nut's terminal surface is provided with the notch that is used for the locking plate jack catch of impressing, its characterized in that, this nut limit for force frock includes:
the wrench head is a hollow cylinder, one end of the wrench head is provided with a wrench head clamping jaw and an identification device, the wrench head clamping jaw is used for being in butt joint with a clamping groove on the end face of the compression nut so as to transmit torque, and the other end of the wrench head is provided with a switching hole of the torque multiplier;
the supporting seat is a hollow sleeve, an observation window is arranged in the circumferential direction of the cylinder body, one end of the supporting seat is used for fixing the outer sleeve on the periphery of the hollow shaft, and the other end of the supporting seat is arranged as a supporting base of the wrench head;
when the compression nut is screwed down, the supporting seat is fixed on the periphery of the hollow shaft, the spanner head is inserted into the supporting seat, the clamping jaw of the spanner head is in butt joint with the clamping groove of the end face of the compression nut, the identification device is aligned with the notch, and the other end of the spanner head is supported by the supporting foundation; through the observation window, the locking plate clamping jaw arranged on the locking plate and the identification device can be observed.
2. The nut force limiting tool according to claim 1, wherein the one end of the support seat is provided with an internal thread for being in threaded connection with an outer periphery of the hollow shaft.
3. The nut force limiting tool of claim 1, wherein the identification device is a notch.
4. The nut force-limiting tool according to claim 1, wherein the supporting seat is provided with two observation windows at intervals on the circumference of the cylinder body.
5. The nut force-limiting tool according to claim 1, wherein an inner hole at the other end of the supporting seat is in clearance fit with the other end of the spanner head, and the fit clearance is 0.05-0.1 mm.
6. The nut force limiting tool of claim 5, wherein said other end of said wrench head has a circumferential flange, said circumferential flange being in clearance fit with said inner bore of said support seat.
7. The nut force-limiting tool according to claim 1, wherein the other end of the support seat is provided with a stopper hole on an outer periphery, and the stopper hole is used for arranging an anti-torque stopper of the torque multiplier.
8. The nut force-limiting tool according to claim 7, wherein a plurality of the stopper holes are circumferentially provided in the end surface of the other end of the support base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920657171.XU CN209868429U (en) | 2019-05-09 | 2019-05-09 | Nut force limiting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920657171.XU CN209868429U (en) | 2019-05-09 | 2019-05-09 | Nut force limiting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209868429U true CN209868429U (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920657171.XU Active CN209868429U (en) | 2019-05-09 | 2019-05-09 | Nut force limiting tool |
Country Status (1)
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| CN (1) | CN209868429U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112729683A (en) * | 2021-03-30 | 2021-04-30 | 中国航发上海商用航空发动机制造有限责任公司 | Dynamic balance process and driving device thereof |
| CN113386079A (en) * | 2020-03-11 | 2021-09-14 | 中国航发商用航空发动机有限责任公司 | Mounting method, tool and fastening kit for special-shaped lock ring |
| CN113442088A (en) * | 2020-03-27 | 2021-09-28 | 中国航发商用航空发动机有限责任公司 | High-pressure rotor compression nut tightening assembly and force application device thereof |
| CN113492308A (en) * | 2020-03-20 | 2021-10-12 | 中国航发商用航空发动机有限责任公司 | Assembly system of gland nut and screwing positioning tool thereof |
| CN113635265A (en) * | 2021-08-26 | 2021-11-12 | 中国航发沈阳黎明航空发动机有限责任公司 | Bearing compression nut tightening process device and method |
| CN113894731A (en) * | 2021-10-10 | 2022-01-07 | 中国航发沈阳发动机研究所 | Deep shaft cavity compression nut screwing force limiting tool |
-
2019
- 2019-05-09 CN CN201920657171.XU patent/CN209868429U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113386079A (en) * | 2020-03-11 | 2021-09-14 | 中国航发商用航空发动机有限责任公司 | Mounting method, tool and fastening kit for special-shaped lock ring |
| CN113386079B (en) * | 2020-03-11 | 2022-11-25 | 中国航发商用航空发动机有限责任公司 | Mounting method, tool and fastening kit for special-shaped lock ring |
| CN113492308A (en) * | 2020-03-20 | 2021-10-12 | 中国航发商用航空发动机有限责任公司 | Assembly system of gland nut and screwing positioning tool thereof |
| CN113492308B (en) * | 2020-03-20 | 2022-03-29 | 中国航发商用航空发动机有限责任公司 | Assembly system of gland nut and screwing positioning tool thereof |
| CN113442088A (en) * | 2020-03-27 | 2021-09-28 | 中国航发商用航空发动机有限责任公司 | High-pressure rotor compression nut tightening assembly and force application device thereof |
| CN112729683A (en) * | 2021-03-30 | 2021-04-30 | 中国航发上海商用航空发动机制造有限责任公司 | Dynamic balance process and driving device thereof |
| CN113635265A (en) * | 2021-08-26 | 2021-11-12 | 中国航发沈阳黎明航空发动机有限责任公司 | Bearing compression nut tightening process device and method |
| CN113894731A (en) * | 2021-10-10 | 2022-01-07 | 中国航发沈阳发动机研究所 | Deep shaft cavity compression nut screwing force limiting tool |
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