CN216229168U - Circumferential pull rod stretching device - Google Patents
Circumferential pull rod stretching device Download PDFInfo
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- CN216229168U CN216229168U CN202122793995.XU CN202122793995U CN216229168U CN 216229168 U CN216229168 U CN 216229168U CN 202122793995 U CN202122793995 U CN 202122793995U CN 216229168 U CN216229168 U CN 216229168U
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- stretching device
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Abstract
The utility model discloses a circumferential pull rod stretching device which comprises a connecting ring, twelve connecting rods and a pressure pump, wherein the connecting ring is fixedly connected with the connecting rod; twelve connecting rods are uniformly distributed on the end surface of the connecting ring along the circumferential direction, the upper end surface and the lower end surface of the connecting ring are communicated, and the bottom of each connecting rod is provided with an internal thread hole with the same size as the circumferential pull rod; every connecting rod top sealing connection has the casing bottom, and the connecting rod top has linked firmly and has rotated the piece, and the casing top is provided with the opening, is provided with the baffle in the casing, baffle and shells inner wall sealing connection, and the baffle links firmly at the connecting rod top, and the baffle is located and rotates the piece below, and the casing is located the baffle below position and is provided with the oil inlet, and the force pump all is connected with the oil inlet of every casing. The pretightening force can be applied to all the circumferential draw-bar bolts simultaneously, the number of workers required in the traditional pretightening force applying process is effectively reduced, and the operation process is simplified.
Description
Technical Field
The utility model belongs to the field of mechanical fixation, and relates to a circumferential pull rod stretching device.
Background
Because the pull rod type rotor has the advantages of light weight, quick start, good thermal expansion performance, easy assembly and the like, heavy-duty gas turbine manufacturers generally adopt a pull rod type rotor structure. The tie rod type rotors are classified into a center tie rod type and a circumferential tie rod type. Wherein, circumference pull rod formula rotor has reduced the manufacturing degree of difficulty owing to need not set up complicated terminal surface tooth between the rim plate, and simultaneously, many pull rods can improve advantages such as the whole security of rotor, have received most gas turbine manufacturer's favor.
The peripheral pull rod rotor tightly presses the multi-stage wheel discs together through a plurality of peripheral pull rod bolts (generally 12), and the wheel discs are in plane contact. In the assembling and disassembling process of the gas turbine rotor, pretightening force needs to be applied to the circumferential pull rod bolt, the reasonable and accurate pretightening force is applied to ensure the integral rigidity of the rotor, the tight fit among the wheel discs of the gas turbine is ensured, and meanwhile, the pretightening force of the pull rod has important influence on the dynamic characteristic of the gas turbine. The application of the pre-tightening force has important significance for the safe and stable operation of the gas turbine.
Because twelve circumferential pull rod bolts of the gas turbine are distributed along the circumferential direction, in order to ensure that the applied pretightening force is consistent, the pretightening force needs to be applied to the twelve pull rod bolts as much as possible, the traditional device for applying the pretightening force is complex in structure and needs to be operated and matched by a plurality of workers, the requirement on operators is high for ensuring that the twelve pull rod bolts are uniformly stressed by the experience of the workers, and the consumed time is long.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a circumferential pull rod stretching device which can apply pretightening force to all circumferential pull rod bolts simultaneously, effectively reduce the number of workers required in the traditional pretightening force application process and simplify the operation process.
In order to achieve the purpose, the utility model adopts the following technical scheme to realize the purpose:
a circumferential pull rod stretching device comprises a connecting ring, twelve connecting rods and a pressure pump;
twelve connecting rods are uniformly distributed on the end surface of the connecting ring along the circumferential direction, the upper end surface and the lower end surface of the connecting ring are communicated, and the bottom of each connecting rod is provided with an internal thread hole with the same size as the circumferential pull rod;
every connecting rod top sealing connection has the casing bottom, and the connecting rod top has linked firmly and has rotated the piece, and the casing top is provided with the opening, is provided with the baffle in the casing, baffle and shells inner wall sealing connection, and the baffle links firmly at the connecting rod top, and the baffle is located and rotates the piece below, and the casing is located the baffle below position and is provided with the oil inlet, and the force pump all is connected with the oil inlet of every casing.
Preferably, the rotating member is a hexagonal nut.
Further, be provided with hexagonal pole spanner in the casing, hexagonal pole spanner bottom is connected with hexagon nut, and casing open-top is stretched out at hexagonal pole spanner top.
Preferably, the output end of the pressure pump is connected with two six-channel shunt input ends, and twelve output ends of the two shunts are respectively connected with oil inlets of twelve shells.
Furthermore, a three-way valve is connected between the pressure pump and the two six-channel flow splitters.
Still further, a pressure gauge is connected between the pressure pump and the three-way valve.
Preferably, the connecting ring comprises an upper ring and a lower ring, the connecting rod is used for communicating the upper ring with the lower ring, and a plurality of connecting plates are connected between the upper ring and the lower ring.
Preferably, the number of the connecting plates is twelve, and the twelve connecting plates and the twelve connecting rods are arranged in a staggered mode.
Preferably, a seal ring is provided on the circumferential surface of the partition plate.
Compared with the prior art, the utility model has the following beneficial effects:
according to the utility model, the connecting rod is connected with the circumferential pull rod, the pressure pump introduces hydraulic oil into the shell through the oil inlet, the partition plate drives the connecting rod to move towards the top end of the shell along with the pressure rise of the hydraulic oil, twelve circumferential pull rod bolts can be simultaneously stretched, the simultaneous application of pre-tightening force to the circumferential pull rod can be ensured, the number of workers required in the traditional pre-tightening force application process can be effectively reduced, and the operation process is simplified.
Further, adopt hexagonal stock spanner cooperation hexagon nut, the convenient rotation to conveniently acquire the pivoted number of turns.
Furthermore, the flow divider can ensure the consistency of hydraulic oil flowing into each shell, and the consistency of pre-tightening force application is ensured.
Furthermore, the pressure gauge can be used for accurately judging the pressure of the hydraulic oil, and the magnitude of the applied pretightening force can be accurately judged.
Furthermore, the connection plate can ensure the stability of the whole connection ring and improve the rigidity of the connection ring.
Drawings
FIG. 1 is a schematic view of a partial structure of a stretching apparatus according to the present invention;
fig. 2 is a top view of the stretching apparatus of the present invention.
Wherein: 1-connecting ring; 2-connecting plates; 3-a connecting rod; 4-a shell; 5-a hexagonal nut; 6-oil inlet; 7-an oil pipe; 8-a flow divider; 9-three-way valve; 10-pressure gauge; 11-a pressure pump; 12-hexagonal long-rod wrench; 13-a separator.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the circumferential pull rod stretching device of the present invention includes a connection ring 1, a connection plate 2, a connection rod 3, a housing 4, a hexagonal nut 5, an oil inlet 6, an oil pipe 7, a flow divider 8, a three-way valve 9, a pressure gauge 10, a pressure pump 11, and a hexagonal long rod wrench 12.
The connecting ring 1 is divided into an upper ring and a lower ring which are fixedly connected through a connecting plate 2 and made of cast iron. The bottom surface of the connecting ring 1 is a plane, so that twelve shells 4 are ensured to be vertically arranged.
Twelve connecting rods 3 are evenly distributed on the connecting ring 1 along the circumferential direction, the upper ring and the lower ring of the connecting ring 1 are communicated, and an internal thread hole with the same size as the circumferential pull rod is formed in the bottom of each connecting rod 3.
The side surface of the connecting rod 3 is not contacted with the connecting ring 1, the connecting rod 3 can rotate in the connecting ring 1, and the size of the internal thread at the lower part is matched with the thread of the circumferential pull rod.
Every 3 top seals of connecting rod set up in 4 bottoms of casing, 3 tops of connecting rod have linked firmly and have rotated the piece, 4 tops of casing are provided with the opening, be provided with baffle 13 in the casing 4, baffle 13 and 4 inner wall sealing connection of casing, baffle 13 links firmly at 3 tops of connecting rod, baffle 13 is located and rotates the piece below, it adopts hexagon nut 5 to rotate the piece in this embodiment, casing 4 is located baffle 13 below position and is provided with oil inlet 6, force pump 11 all is connected with the oil inlet 6 of every casing 4.
The shells 4 are arranged on the upper ring of the connecting ring 1, and twelve shells 4 are uniformly distributed on the end face of the connecting ring 1 along the circumferential direction. The hexagonal long-rod wrench 12 can extend into the shell 4 and be matched with the hexagonal part of the hexagon nut 5 in the shell 4, and the top of the hexagonal long-rod wrench 12 extends out of the top opening of the shell 4.
The hexagonal long-rod wrench can rotate the hexagonal nut 5, thereby driving the connecting rod 3. After the connecting rod 3 and the circumferential pull rod are matched, the hexagonal long-rod wrench 12 can be taken down.
The hexagonal nut 5 is fixedly connected with the connecting rod 3. The hexagonal nut 5 can drive the connecting rod 3 to move up and down and rotate. When the oil inlet 6 is filled with oil, the hexagonal nut 5 is driven by the partition 13 to move upward.
The 2 six-channel flow dividers 8 have twelve outlets which are respectively connected to oil inlets 6 on the twelve shells 4 through oil pipes 7, the output end of the pressure pump 11 is connected with the input ends of the two six-channel flow dividers 8, and a pressure gauge 10 and a three-way valve 9 are connected between the pressure pump 11 and the two six-channel flow dividers 8.
The pressure pump 11 is connected with the pressure gauge 10 through an oil pipe 7, and the pressure gauge 10 is connected with the three-way valve 9 through the oil pipe 7. Two outlets of the three-way valve 9 are connected to an inlet of the multi-channel flow divider 8 through an oil pipe 7. The oil pipe 7 has a non-return function, so that the whole oil supply system can be protected.
The working process of the circumferential pull rod stretching device is as follows.
The assembly and disassembly of the circumferential pull rod rotor need to be carried out on a special rotor precision inspection table, and during assembly, the rotor needs to be erected on the inspection table. Taking the application of the pretightening force of the tie rod bolt at the turbine end as an example, the connecting ring 1 penetrates through the shaft head to be installed on the last-stage wheel disc at the turbine end, the bottom surface of the connecting ring 1 falls on the convex shoulder of the shaft head, the level of the connecting ring 1 is ensured, and meanwhile, the vertical directions of the twelve connecting rods 3 are ensured. The circumferential direction is adjusted so that the twelve connecting rods 3 are opposite to twelve stay bolts which need to apply pretightening force. The hexagonal nut 5 is turned by using a hexagonal long-rod wrench, thereby driving the connecting rod 3 to be matched with the pull rod bolt. The twelve hexagon nuts 5 rotate for the same number of turns, so that the sizes of the pull rod bolt fitting pieces and the pull rod bolt fitting pieces are consistent.
Twelve oil pipes 7 led out from a multi-channel flow divider 8 are connected into oil inlets 6 on twelve shells 4, a pressure pump 11 is started, oil in the pressure pump 11 enters the multi-channel flow divider 8 through a three-way valve 9 and finally enters the oil inlets 6 on twelve shells 4, the twelve stretching devices can be simultaneously pressurized along with the lifting of oil supply pressure, and a hexagon nut 5 moves upwards along with a partition plate 13 to drive a connecting rod 3 to move upwards, so that the stretching of a circumferential pull rod is realized, and the same pretightening force is applied to each pull rod bolt. Meanwhile, the relation between the oil supply pressure and the applied pretightening force can be calculated, and the pretightening force can be monitored according to the value of the pressure gauge 10.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the utility model without departing from the spirit and scope of the utility model, which is to be covered by the claims.
Claims (9)
1. A circumferential pull rod stretching device is characterized by comprising a connecting ring (1), twelve connecting rods (3) and a pressure pump (11);
twelve connecting rods (3) are uniformly distributed on the end surface of the connecting ring (1) along the circumferential direction, the upper end surface and the lower end surface of the connecting ring (1) are communicated, and the bottom of each connecting rod (3) is provided with an internal thread hole with the same size as the circumferential pull rod;
every connecting rod (3) top sealing connection has casing (4) bottom, connecting rod (3) top has linked firmly the rotation piece, casing (4) top is provided with the opening, be provided with baffle (13) in casing (4), baffle (13) and casing (4) inner wall sealing connection, baffle (13) link firmly at connecting rod (3) top, baffle (13) are located and rotate the piece below, casing (4) are located baffle (13) below position and are provided with oil inlet (6), force pump (11) all are connected with oil inlet (6) of every casing (4).
2. A peripheral draw-bar stretching device according to claim 1, wherein the rotating member is a hexagonal nut (5).
3. A circumferential draw bar stretching device as claimed in claim 2, wherein a hexagonal long bar wrench (12) is provided in the housing (4), the bottom of the hexagonal long bar wrench (12) is connected with the hexagonal nut (5), and the top of the hexagonal long bar wrench (12) extends out of the top opening of the housing (4).
4. A peripheral tie rod stretching device according to claim 1, characterized in that the output of the pressure pump (11) is connected with the input of two six-channel flow dividers (8), the twelve output ends of the two flow dividers (8) being connected with the oil inlets (6) of the twelve shells (4), respectively.
5. A circumferential tie-rod stretching device according to claim 4, characterized in that a three-way valve (9) is connected between the pressure pump (11) and the two six-way diverters (8).
6. A circumferential tie rod stretching device according to claim 5, characterized in that a pressure gauge (10) is connected between the pressure pump (11) and the three-way valve (9).
7. A peripheral tie rod stretching device according to claim 1, characterized in that the connecting ring (1) comprises an upper ring and a lower ring, the connecting rods (3) communicating the upper ring with the lower ring, between which a plurality of connecting plates (2) are connected.
8. A peripheral tie rod stretching device according to claim 1, characterized in that the number of tie plates (2) is twelve, and twelve tie plates (2) are staggered with twelve connecting rods (3).
9. A peripheral tie rod stretching device according to claim 1, characterized in that the diaphragm (13) is provided with a sealing ring on its peripheral surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122793995.XU CN216229168U (en) | 2021-11-15 | 2021-11-15 | Circumferential pull rod stretching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122793995.XU CN216229168U (en) | 2021-11-15 | 2021-11-15 | Circumferential pull rod stretching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216229168U true CN216229168U (en) | 2022-04-08 |
Family
ID=80941169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122793995.XU Active CN216229168U (en) | 2021-11-15 | 2021-11-15 | Circumferential pull rod stretching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216229168U (en) |
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2021
- 2021-11-15 CN CN202122793995.XU patent/CN216229168U/en active Active
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