CN112355281A

CN112355281A - Rotary pull-down device for directional solidification of high-temperature alloy

Info

Publication number: CN112355281A
Application number: CN202011259198.7A
Authority: CN
Inventors: 李守忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-02-12

Abstract

The invention discloses a rotary pull-down device for directional solidification of high-temperature alloy, which comprises a lower supporting plate and an upper supporting plate, wherein the upper supporting plate is arranged right above the lower supporting plate, a plurality of lower connecting pipe sleeves are symmetrically and fixedly connected to one side wall of the lower supporting plate close to the upper supporting plate, and a plurality of upper connecting pipe sleeves are symmetrically and fixedly connected to one side wall of the upper supporting plate close to the lower supporting plate. The invention can complete the rotation movement and the pull-down movement required by the rotation pull rod at the same time only by using a single motor, remarkably reduces the cost by reducing the using number of the motors, and combines a mechanism of uniform stress by adopting an interference fit mode of carrying out transmission by depending on friction force and combining with friction resistance feedback regulation, so that when the rotation speed of the rotation pull rod is changed by adjusting the rotation speed of the driving motor according to the requirement of controlling the temperature gradient, the pull-down movement of the rotation pull rod can not be influenced, and the pull-down can be continuously completed at a fixed speed.

Description

Rotary pull-down device for directional solidification of high-temperature alloy

Technical Field

The invention relates to the technical field of directional solidification of high-temperature alloy, in particular to a rotary pull-down device for directional solidification of high-temperature alloy.

Background

The rotary pull-down device is used in a high-temperature alloy directional solidification process, and can drive a metal solidification casting blank to rotate while the metal solidification casting blank is pulled down, so that a liquid phase and a solid phase at a solidification interface are subjected to displacement friction motion, a radial temperature gradient is eliminated, a single temperature gradient along a casting flow direction is formed, the bent liquid-solid interface is straightened, defects are reduced, and the efficiency is improved. Compared with the equiaxial crystal casting blade obtained by a common casting method, the high-temperature strength, creep resistance, durability and thermal fatigue performance of the directionally solidified high-temperature alloy columnar crystal and the single crystal blade are greatly improved, and the blade becomes the first choice and development trend of the use of important parts of advanced aviation and gas engines in recent years.

When the existing rotary pull-down device for directional solidification of high-temperature alloy is used, because the rotary pull rod needs to simultaneously bear the motions in two different directions, namely the rotary motion and the pull-down motion, two motors are usually needed to be arranged, although the effect of driving the rotary pull rod to simultaneously perform the rotary motion and the pull-down motion can also be realized through the matching of a single motor and a transmission structure, in actual operation, the rotating speed of the rotary motion sometimes needs to be adjusted according to the requirement of controlling the temperature gradient, but for the pull-down motion of the rotary pull rod, the speed does not need to be adjusted generally, the pull-down motion can be performed at a fixed speed, and therefore, the problem to be solved is that how to only adjust the rotating speed of the rotary motion without influencing the pull-down motion under the driving of the single motor.

Disclosure of Invention

The invention aims to solve the defects in the prior art, such as: when the existing rotary pull-down device for directional solidification of high-temperature alloy is used, because the rotary pull rod needs to simultaneously bear the motions in two different directions, namely the rotary motion and the pull-down motion, two motors are usually needed to be arranged, although the effect of driving the rotary pull rod to simultaneously perform the rotary motion and the pull-down motion can also be realized through the matching of a single motor and a transmission structure, in actual operation, the rotating speed of the rotary motion sometimes needs to be adjusted according to the requirement of controlling the temperature gradient, but for the pull-down motion of the rotary pull rod, the speed does not need to be adjusted generally, the pull-down motion can be performed at a fixed speed, and therefore, the problem to be solved is that how to only adjust the rotating speed of the rotary motion without influencing the pull-down motion under the driving of the single motor.

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

the utility model provides a rotatory device that pulls down for directional solidification of superalloy, includes bottom suspension fagging and last backup pad, it sets up directly over the bottom suspension fagging to go up the backup pad, a plurality of lower connecting pipe box of symmetry fixedly connected with on the lateral wall that the bottom suspension fagging is close to last backup pad, go up on the lateral wall that the backup pad is close to the bottom suspension fagging on the symmetry fixedly connected with a plurality of connecting pipe box, every two are just to setting up all rotate between lower connecting pipe box and the last connecting pipe box and be connected with the threaded rod, threaded connection has the screwed pipe on the threaded rod, and is a plurality of fixedly connected with mount table between the screwed pipe, be equipped with rotary motion drive arrangement on the mount table, be equipped with the pull-down motion transmission on the bottom suspension fagging.

Preferably, the rotary motion driving device comprises a driving motor, the driving motor is fixedly connected to the bottom side wall of the mounting table, a first helical gear is fixedly connected to the output end of the driving motor, a first ball bearing is arranged in the mounting table, a rotary pull rod is connected to the first ball bearing in a rotating mode, a second helical gear meshed with the first helical gear is fixedly connected to the bottom end of the rotary pull rod, a second ball bearing is arranged in the upper supporting plate, a linear bearing is arranged in the second ball bearing, and one end, far away from the mounting table, of the rotary pull rod is fixedly connected to the linear bearing.

Preferably, the pull-down motion transmission device comprises a switching pipe sleeve, the switching pipe sleeve is fixedly connected to the lower supporting plate, a connecting rod is connected to the switching pipe sleeve in a rotating mode, an end, far away from the switching pipe sleeve, of the connecting rod is fixedly connected with a driving wheel, a square sliding groove is formed in the rotating pull rod, a square sliding rod is connected to the square sliding groove in a sliding mode, the bottom end of the square sliding rod is fixedly connected with the driving wheel, the threaded rod is close to a fixed pipe fixedly connected to the outer side wall of one end of the lower connecting pipe sleeve, a clamping groove is formed in the fixed pipe, a driven wheel is connected to the clamping groove.

Preferably, the pull-down movement speed limiting device comprises a rotary table, the rotary table is fixedly connected to a fixed pipe, a plurality of empty grooves are symmetrically and fixedly connected to the inside of the rotary table, sliders are connected to the inside of the empty grooves in a sliding mode, a reset spring is fixedly connected to the inside walls of the sliders and the empty grooves, one end, far away from the reset spring, of each slider is fixedly connected to a top plate, a blocking cover is fixedly connected to the lower connecting pipe sleeve, a cavity is formed in the blocking cover, and the rotary table is located in the cavity.

Preferably, both the driving wheel and the driven wheel are provided with grooves, and the transmission belt is positioned in the grooves.

Compared with the prior art, the invention has the beneficial effects that:

1. the rotary pull rod can simultaneously complete the rotary motion and the pull-down motion required by the rotary pull rod only by using a single motor, and compared with the traditional mode that two motors, namely the rotary motor and the pull-down motor, are used for driving, the cost is obviously reduced by reducing the number of the motors.

2. When the rotary table rotates along with the fixed pipe, the slide block extends out of the empty groove under the action of centrifugal force, when the rotary table reaches a certain rotating speed, the top plate is abutted against the inner side wall of the cavity, the top plate is subjected to resistance due to friction with the cavity, when the resistance is consistent with the friction driving force given by the driven wheel, the rotary table keeps rotating at a constant speed and keeps the state continuously, so that the threaded rod can rotate at a constant speed, the mounting table and the rotary pull rod are driven to pull down at a fixed speed, and the uniform stress mechanism is achieved by adopting the interference fit mode of transmission according to the friction force and combining with the friction resistance feedback regulation, so that the pull-down motion of the rotary pull rod can be unaffected when the rotating speed of the rotary pull rod is changed by adjusting the rotating speed of the driving motor according to the requirement of controlling the temperature gradient under the condition that a single driving motor is adopted to simultaneously to drive the rotary, the pull-down continues to be completed at a fixed speed.

Drawings

FIG. 1 is a schematic front view of a rotary downdraw apparatus for directional solidification of superalloys according to the present invention;

FIG. 2 is a cross-sectional view of the internal structure of a rotary downdraw apparatus for directional solidification of superalloys in accordance with the present invention;

fig. 3 is an enlarged view of the structure a in fig. 2.

In the figure: the device comprises a lower supporting plate 1, an upper supporting plate 2, a lower connecting pipe sleeve 3, an upper connecting pipe sleeve 4, a threaded rod 5, a threaded pipe 6, a mounting table 7, a driving motor 8, a first bevel gear 9, a first ball bearing 10, a rotary pull rod 11, a second bevel gear 12, a second ball bearing 13, a linear bearing 14, a switching pipe sleeve 15, a connecting rod 16, a driving wheel 17, a square sliding groove 18, a square sliding rod 19, a fixed pipe 20, a clamping groove 21, a driven wheel 22, a driving belt 23, a rotating disc 24, a hollow groove 25, a sliding block 26, a return spring 27, a top plate 28, a retaining cover 29 and a cavity 30.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, a rotatory device that pulls down for directional solidification of superalloy, including bottom suspension fagging 1 and last backup pad 2, it sets up directly over bottom suspension fagging 2 to go up backup pad 2, a plurality of lower connecting pipe box 3 of symmetry fixedly connected with on the lateral wall that bottom suspension fagging 1 is close to last backup pad 2, go up backup pad 2 and a plurality of connecting pipe box 4 of symmetry fixedly connected with on the lateral wall that is close to bottom suspension fagging 1, every two are just all to rotate between lower connecting pipe box 3 and the last connecting pipe box 4 that set up and be connected with threaded rod 5, threaded connection has screwed pipe 6 on threaded rod 5, fixedly connected with mount table 7 between a plurality of screwed pipe 6.

Be equipped with rotary motion drive arrangement on mount table 7, rotary motion drive arrangement includes driving motor 8, driving motor 8 fixed connection is on the bottom side wall of mount table 7, the first helical gear 9 of fixedly connected with on driving motor 8's the output, be equipped with first ball bearing 10 in the mount table 7, first ball bearing 10 internal rotation is connected with rotatory pull rod 11, fixedly connected with and the second helical gear 12 of first helical gear 9 meshing connection on rotatory pull rod 11's the bottom, upward be equipped with second ball bearing 13 in the backup pad 2, be equipped with linear bearing 14 in the second ball bearing 13, the one end fixed connection that mount table 7 was kept away from to rotatory pull rod 11 is in linear bearing 14.

Be equipped with the pull-down motion transmission on the bottom suspension fagging 1, pull-down motion transmission includes switching pipe box 15, switching pipe box 15 fixed connection is on bottom suspension fagging 1, switching pipe box 15 internal rotation is connected with connecting rod 16, connecting rod 16 keeps away from one of switching pipe box 15 and serves fixedly connected with action wheel 17, be equipped with square spout 18 in the swing link 11, sliding connection has square slide bar 19 in the square spout 18, square slide bar 19's bottom and action wheel 17 fixed connection, threaded rod 5 is close to fixedly connected with fixed pipe 20 on the lateral wall of connecting pipe box 3 one end down.

Be equipped with draw-in groove 21 on the fixed pipe 20, the internal rotation of draw-in groove 21 is connected with from driving wheel 22, action wheel 17 and from driving wheel 22 pass through the transmission of drive belt 23 and connect, action wheel 17 all is equipped with the recess on the driving wheel 22, drive belt 23 is located the recess, be equipped with the pull-down motion speed limiting device on the lower connecting pipe box 3, the pull-down motion speed limiting device includes carousel 24, carousel 24 fixed connection is on fixed pipe 20, a plurality of dead slots 25 of symmetry fixedly connected with in carousel 24, equal sliding connection has slider 26 in a plurality of dead slots 25, fixedly connected with reset spring 27 between slider 26 and the inside wall of dead slot 25, slider 26 keeps away from one of reset spring 27 and serves fixedly connected with roof 28, fixedly connected with keeps off the cover 29 on the lower connecting pipe box 3, be equipped with cavity.

When the invention is used, the driving motor 8 is started, the output end of the driving motor 8 drives the first bevel gear 9 to rotate, the first bevel gear 9 drives the second bevel gear 12 to rotate through the meshing connection effect, the second bevel gear 12 drives the rotary pull rod 11 to rotate to provide the rotary motion required by rotary pull-down, when the rotary pull rod 11 rotates, because the square sliding groove 18 and the square sliding rod 19 are both square, the square sliding groove 18 has a limiting effect on the square sliding rod 19, the square sliding rod 19 can rotate along with the rotary pull rod 11, the square sliding rod 19 drives the driving wheel 17 to rotate, and the driving wheel 17 drives the driven wheel 22 to rotate along with the driving wheel 17 through the transmission belt 23.

Follow driving wheel 22 and rotate to be connected in draw-in groove 21, carry out interference transmission by frictional force between driven wheel 22 and the fixed pipe 20, it is rotatory with fixed pipe 20 of frictional force drive between the draw-in groove 21 inside wall to rely on from driving wheel 22 promptly, fixed pipe 20 drives threaded rod 5 rotatory, utilize the threaded connection effect between threaded rod 5 and the screwed pipe 6, drive mount table 7 drives rotatory pull rod 11 and moves down along vertical direction, the pull-down motion in the rotatory pull-down is provided, to the rotary motion of rotatory pull rod 11, can adjust the rotatory speed of rotatory pull rod 11 through control driving motor 8.

In the present invention, when the rotary disc 24 rotates with the fixed pipe 20, the sliding block 26 will extend out of the empty slot 25 under the action of centrifugal force, when the rotary disc 24 reaches a certain rotation speed, the top plate 28 will abut against the inner side wall of the cavity 30, the top plate 28 will receive resistance due to friction with the cavity 30, and when the resistance is consistent with the friction driving force given by the driven wheel 22, the rotary disc 24 will maintain constant rotation and keep the state.

The threaded rod 5 is ensured to rotate at a constant speed, the mounting table 7 and the rotary pull rod 11 are driven to pull down at a fixed speed, and the interference fit mode of driving by friction is adopted, and a mechanism of uniform stress is achieved by combining friction resistance feedback adjustment, so that the pull-down movement of the rotary pull rod 11 can be unaffected when the rotating speed of the rotary pull rod 11 is changed by adjusting the rotating speed of the driving motor 8 according to the requirement of controlling the temperature gradient under the condition that the single driving motor 8 is adopted to drive rotation and pull-down movement at the same time, and the pull-down movement is continuously completed at the fixed speed.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a rotatory device that pulls down for superalloy directional solidification, includes backup pad (1) and last backup pad (2), its characterized in that, go up backup pad (2) and set up directly over backup pad (1), a plurality of lower connecting pipe box (3) of symmetry fixedly connected with on the lateral wall that backup pad (2) is close to in backup pad (1) are gone up in backup pad (1), go up backup pad (2) and be close to on the lateral wall of backup pad (1) a plurality of connecting pipe box (4) of symmetry fixedly connected with, every two be just to setting up all be connected with threaded rod (5) between lower connecting pipe box (3) and last connecting pipe box (4), threaded rod (5) go up threaded connection has screwed pipe (6), a plurality of fixedly connected with mount table (7) between screwed pipe (6), be equipped with rotary motion drive arrangement on mount table (7), the lower supporting plate (1) is provided with a downward-pulling motion transmission device, and the lower connecting pipe sleeve (3) is provided with a downward-pulling motion speed limiting device.

2. A rotary pulldown device for directional solidification of a superalloy according to claim 1, it is characterized in that the rotary motion driving device comprises a driving motor (8), the driving motor (8) is fixedly connected on the bottom side wall of the mounting table (7), the output end of the driving motor (8) is fixedly connected with a first helical gear (9), a first ball bearing (10) is arranged in the mounting table (7), a rotary pull rod (11) is rotationally connected in the first ball bearing (10), the bottom end of the rotary pull rod (11) is fixedly connected with a second bevel gear (12) which is meshed and connected with the first bevel gear (9), a second ball bearing (13) is arranged in the upper supporting plate (2), a linear bearing (14) is arranged in the second ball bearing (13), one end of the rotary pull rod (11) far away from the mounting table (7) is fixedly connected in the linear bearing (14).

3. The rotary pulling-down device for directional solidification of high-temperature alloy according to claim 2, wherein the pulling-down motion transmission device comprises a switching pipe sleeve (15), the switching pipe sleeve (15) is fixedly connected to the lower support plate (1), a connecting rod (16) is rotatably connected to the switching pipe sleeve (15), a driving wheel (17) is fixedly connected to one end, far away from the switching pipe sleeve (15), of the connecting rod (16), a square sliding groove (18) is formed in the rotary pulling rod (11), a square sliding rod (19) is slidably connected to the square sliding groove (18), the bottom end of the square sliding rod (19) is fixedly connected to the driving wheel (17), a fixing pipe (20) is fixedly connected to the outer side wall of one end, close to the lower connecting pipe sleeve (3), of the threaded rod (5), and a clamping groove (21) is formed in the fixing pipe (20), the draw-in groove (21) internal rotation is connected with from driving wheel (22), driving wheel (17) and follow driving wheel (22) are through drive belt (23) transmission connection.

4. The rotary pull-down device for directional solidification of high-temperature alloy according to claim 3, wherein the pull-down movement speed limiting device comprises a rotary table (24), the rotary table (24) is fixedly connected to the fixed pipe (20), a plurality of empty grooves (25) are symmetrically and fixedly connected to the inside of the rotary table (24), a plurality of sliding blocks (26) are slidably connected to the inside of the empty grooves (25), a return spring (27) is fixedly connected between the sliding blocks (26) and an inner side wall of the empty grooves (25), a top plate (28) is fixedly connected to one end, away from the return spring (27), of each sliding block (26), a blocking cover (29) is fixedly connected to the lower connecting pipe sleeve (3), a cavity (30) is arranged in each blocking cover (29), and the rotary table (24) is located in each cavity (30).

5. A rotary pulldown device for directional solidification of superalloy according to claim 3, wherein the driving pulley (17) and the driven pulley (22) are each provided with a groove, and the transmission belt (23) is located in the groove.