CN217912878U - Single-drive machine tool tailstock mechanism for gas turbine blade - Google Patents

Abstract

The utility model provides a singly drive lathe tailstock mechanism for gas turbine blade, it can be when processing the gas turbine blade, and the blade crown is in time with changeing to realize the effect of similar two lathe of driving, improve the equipment utilization ratio of singly driving the lathe. The tail stock comprises a tail stock body, a tip seat, a tip shaft, a sliding cylinder, a front end bearing, a thrust bearing, a rear end bearing and a thrust oil cylinder; a through hole is formed in the middle of the tailstock body, the front end of the sliding cylinder extends into the through hole and is coaxially connected with the center seat, and the rear end of the sliding cylinder is connected with the propulsion oil cylinder; the center shaft and the center seat are coaxially arranged, the front end of the center shaft extends out of the center seat, and the front end bearing, the thrust bearing and the rear end bearing are respectively sleeved at the front, middle and rear parts of the center shaft.

Description

Single-drive machine tool tailstock mechanism for gas turbine blade

Technical Field

The utility model relates to a blade machine tool technical field specifically is a single lathe tailstock mechanism that drives for combustion engine blade.

Background

The turbine blade shown in fig. 1 has a short length and a wide profile compared to a conventional turbine blade. When five-axis rotary milling is carried out on a single-drive machine tool, the phenomena that the root profile A is qualified and the crown profile B is over-cut seriously occur, but the five-axis rotary milling can be well carried out on a double-drive machine tool with a headstock and a tailstock capable of being synchronously driven.

The single-drive machine tool tailstock has no rotary power, is provided with a dead center, realizes rotation by reducing friction by coating butter, has wide blade profile of a combustion engine and large rotary swing amplitude, increases the friction between the blade rotation and the tailstock center, causes the rotation of the crown of the blade contacted with the tailstock center of the machine tool to be untimely and the torsional deformation of the profile of the crown, so that the single-drive machine tool has very low qualification rate of processing the combustion engine blade and long debugging period. The double-drive machine tool is expensive and limited in quantity, and the limitation of the single-drive machine tool limits the improvement of the capacity of the gas turbine blade.

SUMMERY OF THE UTILITY MODEL

When processing the gas turbine blade to single lathe that drives, the problem that crown profile torsional deformation can appear, the utility model provides a single lathe tailstock mechanism that drives for gas turbine blade, it can be when processing the gas turbine blade, and the blade crown follows with to change in time to realize the effect of similar two lathes that drive, improve the rate of equipment utilization that the lathe was driven alone.

The technical scheme is as follows: the utility model provides a single-driven lathe tailstock mechanism for combustion engine blade, its includes tailstock body, apex seat, apex axle, its characterized in that: the device also comprises a sliding cylinder, a front end bearing, a thrust bearing, a rear end bearing and a thrust oil cylinder; a through hole is formed in the middle of the tailstock body, the front end of the sliding cylinder extends into the through hole and is coaxially connected with the center seat, and the rear end of the sliding cylinder is connected with the propulsion oil cylinder; the center shaft and the center seat are coaxially arranged, the front end of the center shaft extends out of the center seat, and the front end bearing, the thrust bearing and the rear end bearing are respectively sleeved at the front, middle and rear parts of the center shaft.

It is further characterized in that:

an end cover is arranged between the front end of the center seat and the center shaft, the end cover is annular, a counter bore and a through hole I are formed in the middle of the interior of the end cover from front to back, a sealing ring is embedded in the counter bore, the sealing ring is sleeved on the center shaft, and the rear end face of the end cover abuts against the front end bearing;

the center shaft comprises a center with one conical end and a stepped shaft behind the center, the stepped shaft sequentially comprises a head outer circular surface, a shaft shoulder, a neck outer circular surface, a small outer circular surface and a tail outer circular surface from front to back, the outer diameter of the shaft shoulder is larger than the diameters of the head outer circular surface and the neck outer circular surface, the sealing ring is sleeved on the head outer circular surface, the large outer circular surface in the circumferential direction of the shaft shoulder is used for interference fit with the inner diameter of the front end bearing, a shaft shoulder surface towards the back of the shaft shoulder is used for abutting against the front end surface of the inner ring of the thrust bearing, the neck outer circular surface is in interference fit with the inner ring of the thrust bearing, and the tail outer circular surface is used for interference fit with the inner diameter of the rear end bearing;

the center seat is internally provided with a through hole used for placing the center shaft, the through hole comprises a head part and a tail part, the head part is located at the front end and protrudes outwards, the tail part is located at the rear end, a step hole is formed in the head part and comprises a first step surface and a second step surface which face the front end, the head part is further provided with a first assembly hole and a second assembly hole, the tail part is internally provided with a third step surface which faces the rear end, the first step surface is used for installing the front end bearing, the second step surface is used for abutting against the rear end surface of an outer ring of the thrust bearing, the first assembly hole is matched with a avoidance hole in the end cover to install a first connecting piece, the first connecting piece is used for connecting the center seat with the sliding barrel, the second assembly hole is matched with a third assembly hole in the end cover to install a second connecting piece, the second connecting piece is used for connecting the center seat with the end cover, and the third step surface is used for installing the rear end bearing;

a first accommodating hole used for accommodating the head of the tip seat and a second accommodating hole used for accommodating the tail of the tip seat are formed in the sliding barrel, the inner diameter of the first accommodating hole is larger than that of the second accommodating hole, the inner wall of the first accommodating hole is in transition fit with the head of the tip seat, the inner bottom surface of the first accommodating hole abuts against the rear end surface of the head of the tip seat, a third assembling hole is formed in the first accommodating hole, and the third assembling hole is matched with the first assembling hole and used for installing the first connecting piece;

the tailstock structure further comprises a locking sleeve positioned between the tailstock body and the sliding barrel, oil passages which are communicated with each other are respectively arranged in the tailstock body and between the tailstock body and the locking sleeve, and the oil passages are connected with a supercharger.

By adopting the structure, the tip of the single-drive machine tool can rotate along with the shaft A of the machine tool, the smooth operation of the tip shaft can be ensured by respectively arranging the front end bearing and the rear end bearing at the front, middle and rear sections, and the tip shaft can bear larger thrust by the thrust bearing, so that the problem of torsional deformation of the molded surface of the crown part of the blade to be processed due to untimely rotation is avoided, the effect similar to that of a double-drive machine tool is realized, and the variety of products which can be processed by the single-drive machine tool is expanded; when the tailstock is used, the position of the tip can be changed through the propelling oil cylinder, the tailstock is convenient to use, when the tailstock is integrally transformed from an original tailstock structure, the device transformation cost is low, the period is short, the tailstock is economical and applicable, and the performance of the machine tool is improved with the lowest cost.

Drawings

FIG. 1 is a schematic view of a gas turbine blade configuration;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic view of a slide cartridge;

FIG. 4 is a front cross-sectional view of the tip seat;

FIG. 5 is a left side view of the tip seat;

FIG. 6 is a front cross-sectional schematic view of the end cap;

FIG. 7 is a left side view of the end cap;

FIG. 8 is a schematic view of the configuration of the tip shaft;

in the figure, A-root profile; b-crown profile; 1-a tailstock body; 2-a slide cylinder; 3-rear end bearing; 4-a tip seat; 5-a thrust bearing; 6-front end bearing; 7-end cap; 8-a tip shaft; 9-sealing ring; 10-a fastening screw; 11-a locking sleeve; 12-oil way; 13-a supercharger; 14-a propulsion oil cylinder; 2 a-inner wall one; 2 b-inner bottom surface; 2 c-assembly hole III; 2 d-inner wall two; 4 a-a head; 4 b-head rear end face; 4 c-tail; 4 d-step surface I; 4 e-step surface two; 4 f-assembly hole II; 4 g-step surface III; 4h, assembling the first hole; 7 a-a counter bore; 7 b-a first through hole; 7 c-avoiding holes; 7 d-end cover rear end face; 7 e-assembly hole III; 8 a-the outer circular surface of the head; 8 b-shaft shoulder; 8 c-shoulder surface I; 8 d-the external circular surface of the neck; 8 e-the outer circular surface of the tail part; 8 f-small external circular surface.

Detailed Description

As shown in fig. 2, the single-drive machine tool tailstock mechanism for the blades of the combustion engine comprises a tailstock body 1, a sliding cylinder 2, a rear end bearing 3, a center seat 4, a thrust bearing 5, a front end bearing 6, an end cover 7, a center shaft 8, a sealing ring 9 and a thrust oil cylinder 14; a through hole is formed in the middle of the tailstock body 1, the front end of the sliding cylinder 2 extends into the through hole and is coaxially connected with the center seat 4, and the rear end of the sliding cylinder 2 is connected with the thrust cylinder 14, so that the sliding cylinder can extend and retract under the action of the thrust cylinder 14 and can move forward or backward to a proper position relative to the tailstock body 1; the center shaft 8 and the center seat 4 are coaxially arranged, the front end of the center shaft extends out of the center seat 4, and the front end bearing 6, the thrust bearing 5 and the rear end bearing 3 are respectively sleeved on the front middle rear part of the center shaft 8.

Specifically, an end cover 7 is arranged between the front end of the center seat 4 and the center shaft 8, and with the combination of fig. 6 and fig. 7, the end cover 7 is annular, a counter bore 7a and a through hole 7b are formed in the middle of the interior of the end cover from front to back, a sealing ring 9 is embedded in the counter bore 7a, the sealing ring 9 is sleeved on the center shaft 8, scrap iron and cutting fluid can be prevented from entering the center shaft, the center shaft is damaged, the through hole 7b is not in contact with the center shaft 8, and the rear end face 7d of the end cover abuts against the outer ring of the front end bearing 6.

Referring to fig. 8, the center shaft 8 includes a center with a tapered end and a stepped shaft behind the center, the stepped shaft includes a head outer circular surface 8a, a shoulder 8b, a neck outer circular surface 8d, a small outer circular surface 8f and a tail outer circular surface 8e sequentially from front to back, the outer diameter of the shoulder 8b is larger than the diameters of the head outer circular surface 8a and the neck outer circular surface 8d, a seal ring 9 is sleeved on the head outer circular surface 8a to form a seal therewith, the large outer circular surface of the shoulder 8b in the circumferential direction is used for interference fit with the inner diameter of the front end bearing 6, the shoulder surface 8c of the shoulder 8b facing the back is used for abutting against the front end face of the inner ring of the thrust bearing 5, the neck outer circular surface 8d is in interference fit with the inner ring of the thrust bearing 5, the tail outer circular surface 8e is used for interference fit with the inner diameter of the rear end bearing 3, and the center shaft 8 and the inner rings of the three sets of bearings are integrated to maintain rotational balance.

Referring to fig. 4 and 5, a through hole for inserting the center shaft is formed in the center seat 4, the through hole includes a head portion 4a located at the front end and protruding outward and a tail portion 4c located at the rear end, a stepped hole is formed in the head portion 4a and includes a first stepped surface 4d and a second stepped surface 4e facing the front end, the head portion 4a further includes a first assembly hole 4f and a second assembly hole 4h, the tail portion 4c includes a third stepped surface 4g facing the rear end, the first stepped surface 4d is used for mounting the front end bearing 6, the second stepped surface 4e is used for abutting against the rear end surface of the outer ring of the thrust bearing 5, so as to form an axial force line from the center shaft 8 to the bearing to the center seat 4, the first assembly hole 4h (a forward assembly hole) is used for mounting a first connecting member 10 (e.g., a fastening screw) in cooperation with a relief hole 7c on the end cover 7 shown in fig. 7, the first connecting member 10 is used for connecting the center seat 4 with the sliding barrel 2, the second assembly hole 4f (a reverse assembly hole) in cooperation with a relief hole 7e (a fastening screw) on the end cover 7, and the second assembly hole 7 e.g, the second assembly hole is used for connecting member 3, and the second assembly hole is used for connecting member 3.

The thrust bearing 5 is a cylindrical thrust roller bearing, is high in rigidity and impact-resistant, is arranged on the second step surface 4e of the center seat, can well bear the thrust from the center shaft 8, is low in rotating speed and accords with the characteristics of five-axis rotary milling; the front end bearing 6 is a precise needle bearing without an inner ring, is arranged on the step surface one 4d of the center seat 4 and is not in contact with the thrust bearing 5, so that the center shaft 8 rotates more stably in the radial direction without the inner ring, and the center shaft 8 can be thicker in a limited space. The rear end bearing 3 is specifically two needle roller bearings which are arranged side by side and arranged on the step surface three 4g of the center seat 4, so that the tail swing phenomenon of the center shaft 8 is prevented; the front end bearing 6, the thrust bearing 5 and the rear end bearing 3, the outer rings of the three groups of bearings are all forced on the tip seat 4, and the stability is good.

With reference to fig. 3, a first accommodating hole for accommodating the head 4a of the center seat 4 and a second accommodating hole for accommodating the tail 4c of the center seat 4 are formed in the sliding barrel, the center seat 4 is embedded into the sliding barrel 2 to ensure good bottom contact, the inner diameter of the first accommodating hole is larger than that of the second accommodating hole, the inner wall 2a of the first accommodating hole is in transition fit with the head 4a of the center seat 4, the inner bottom surface 2b of the first accommodating hole abuts against the rear end surface 4b of the head of the center seat 4, and an assembling hole three 2c (threaded hole) is formed in the first accommodating hole, the assembling hole three 2c is matched with the assembling hole one 4h to install a first connecting piece 10, a fastening screw is fixedly installed with the assembling hole three 2c of the sliding barrel through the assembling hole one 4h of the center seat 4, and the tail 4c is not in contact with the inner wall two 2d of the second accommodating hole.

The novel tailstock further comprises a locking sleeve 11 positioned between the tailstock body 1 and the sliding barrel 2, oil ways 12 which are communicated with each other are respectively arranged in the tailstock body 1 and between the tailstock body 1 and the locking sleeve 11, and the oil ways 12 are connected with a supercharger 13. After the sliding cylinder 2 stretches to a proper position, the supercharger 13 pressurizes hydraulic oil in the oil way 12 to drive the locking sleeve 11 to lock the sliding cylinder 2, otherwise, the oil way 12 is decompressed, the locking sleeve 11 releases the sliding cylinder 2, and the sliding cylinder 2 can slide back and forth.

The total length of the center shaft of the device can be set to be 77mm, the diameter of the center seat can be set to be phi 50mm, and the length allowed by the installation inner hole of the sliding cylinder is fully utilized; the center shaft can extend out of the front end face of the sliding cylinder by 27mm, and the machine tool is guaranteed to have enough stroke, so that the tailstock center is short, short and thick in a limited space, the machining process can bear larger thrust, the distance of the center extending out of the sleeve is short, and the machine tool is guaranteed to have enough stroke.

When the device is used, the following steps are adopted, namely, the thrust bearing 5 is pressed into the second step surface 4e of the tip seat 4 after being frozen, the front end bearing 6 is pressed into the first step surface 4d of the tip seat 4 after being frozen, and the rear end bearing 3 is pressed into the third step surface 4g of the tip seat 4 after being frozen.

And step two, inserting the refrigerated tip shaft 8 into the assembled bearing of the tip seat 4, wherein the inner diameter of the front end bearing 6, the inner ring of the thrust bearing 5 and the inner diameter of the rear end bearing 3 are sequentially arranged, and ensuring that the first shaft shoulder surface 8c is in abutting connection with the upper end surface of the inner ring of the thrust bearing 5.

And thirdly, embedding a sealing ring 9 into a front end counter bore 7a of the end cover 7, sleeving the end cover 7 on a tip shaft 8 on the tip seat 4 in a sleeving manner, enabling the sealing ring 9 to be in tight contact with an outer circular surface 8a of the head of the tip shaft 8 to form sealing, attaching a rear end face 7d of the end cover 7 to an upper end face of an outer ring of the front end bearing 6, and enabling a fastening screw to pass through a second assembling hole 4f in the top of the tip seat 4 and be fixedly installed with a third assembling hole 7e of the end cover 7.

And step four, the center seat 4 is plugged into the sliding barrel 2, the rear end face 4b of the head of the center seat 4 is ensured to be in good contact with the inner bottom face 2b of the sliding barrel 2, and the fastening screw 10 penetrates through the assembly hole 4h at the front end of the center seat 4 and is fixedly installed with the assembly hole three 2c of the sliding barrel 2.

And step five, the sliding cylinder 2 is pushed forwards by the propelling oil cylinder 14, the tip is pushed into a central hole of the crown part of the blade of the combustion engine, the oil way 12 is pressurized, the locking sleeve 11 is tightly held by the sliding cylinder 2, and the tip is locked at the moment, so that normal machining can be realized.

After the embodiment is adopted, the over-cutting phenomenon is improved, the profile and the gas inlet and outlet edge profile are changed to be very smooth, the gas turbine blade processed on the double-drive machine tool can be placed on the single-drive machine tool for processing, the bottleneck of a workshop in the aspect of the double-drive machine tool is released, and the equipment utilization rate of the single-drive machine tool is improved.

The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (6)

1. The utility model provides a single-driven lathe tailstock mechanism for combustion engine blade, its includes tailstock body, apex seat, apex axle, its characterized in that: the device also comprises a sliding cylinder, a front end bearing, a thrust bearing, a rear end bearing and a thrust oil cylinder; a through hole is formed in the middle of the tailstock body, the front end of the sliding cylinder extends into the through hole and is coaxially connected with the center seat, and the rear end of the sliding cylinder is connected with the propulsion oil cylinder; the center shaft and the center seat are coaxially arranged, the front end of the center shaft extends out of the center seat, and the front end bearing, the thrust bearing and the rear end bearing are respectively sleeved at the front, middle and rear parts of the center shaft.

2. The tailstock mechanism of a single-drive machine tool for a combustion engine blade as claimed in claim 1, wherein: an end cover is arranged between the front end of the center seat and the center shaft, the end cover is annular, a counter bore and a through hole I are formed in the middle of the inner portion of the end cover from front to back, a sealing ring is embedded in the counter bore and sleeved on the center shaft, and the rear end face of the end cover abuts against the front end bearing.

3. The tailstock mechanism of a single-drive machine tool for a combustion engine blade as claimed in claim 2, wherein: the center shaft comprises a center with one conical end and a stepped shaft behind the center, the stepped shaft sequentially comprises a head outer circular surface, a shaft shoulder, a neck outer circular surface, a small outer circular surface and a tail outer circular surface from front to back, the outer diameter of the shaft shoulder is larger than the diameters of the head outer circular surface and the neck outer circular surface, the sealing ring is sleeved on the head outer circular surface, the large outer circular surface in the circumferential direction of the shaft shoulder is used for being in interference fit with the inner diameter of the front end bearing, a shaft shoulder surface towards the back of the shaft shoulder is used for abutting against the front end face of the inner ring of the thrust bearing, the neck outer circular surface is in interference fit with the inner ring of the thrust bearing, and the tail outer circular surface is used for being in interference fit with the inner diameter of the rear end bearing.

4. The single-drive machine tool tailstock mechanism for the blades of the combustion engine as claimed in claim 3, wherein: the utility model discloses a thrust bearing, including the tip seat, the tip seat is inside to be offered and to be used for putting into the through-hole of tip axle, its afterbody including being located the outside bellied head of front end and being located the rear end, the inside shoulder hole of having seted up of head and including the step face one and the step face two towards the front end, pilot hole one and pilot hole two have still been seted up to the head, the inside step face three towards the rear end that includes of afterbody, step face one is used for the installation the front end bearing, step face two be used for with thrust bearing's outer lane rear end face offsets, pilot hole one with dodge on the end cover hole cooperatees and is used for erection joint spare one, connecting piece one be used for the tip seat with the smooth section of thick bamboo is connected, pilot hole two with pilot hole three-phase cooperation on the end cover is used for erection joint spare two, connecting piece two is used for the tip seat with the end cover is connected, step face three is used for the installation the rear end bearing.

5. The single-drive machine tool tailstock mechanism for the blades of the combustion engine as claimed in claim 4, wherein: the sliding barrel is internally provided with a first accommodating hole used for accommodating the head of the center seat and a second accommodating hole used for accommodating the tail of the center seat, the inner diameter of the first accommodating hole is larger than that of the second accommodating hole, the first inner wall of the first accommodating hole is in transition fit with the head of the center seat, the inner bottom surface of the first accommodating hole is abutted to the rear end face of the head of the center seat and is provided with a third assembling hole, and the third assembling hole is matched with the first assembling hole and is used for installing the first connecting piece.

6. The tailstock mechanism of a single-drive machine tool for a blade of a combustion engine as claimed in any one of claims 1 to 5, wherein: the tailstock body is provided with a tail seat body and a sliding cylinder, the tail seat body is provided with a locking sleeve, the sliding cylinder is arranged in the tail seat body, the tail seat body is provided with a locking sleeve, the locking sleeve is arranged in the tail seat body, the tail seat body and the locking sleeve are respectively provided with an oil way which is communicated with each other, and the oil way is connected with a supercharger.

Images