CN215257385U

CN215257385U - Tilting pad bearing

Info

Publication number: CN215257385U
Application number: CN202121543757.7U
Authority: CN
Inventors: 魏志峡; 何剑; 王承东; 贺正华; 周勇; 张涛; 陶传武; 王成龙; 张勇; 卢国荣
Original assignee: Chengdu Zhongkeji Pump Co ltd
Current assignee: Chengdu Zhongkeji Pump Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2021-12-21
Anticipated expiration: 2031-07-07

Abstract

The utility model relates to a tilting pad bearing, set up cyclic annular slot in the axle housing, the at least three tilting pads of arranging along the circumferencial direction of cyclic annular ditch inslot installation, the nearly heart side of tilting pads sets up the circular arc recess, the clearance is kept somewhere with cyclic annular slot tank bottom in the back of tilting pads, the back of tilting pads sets up outer mounting hole, install the bearing in the outer mounting hole, bearing telecentric side sets up the ball mortar, the cooperation of the sphere portion that ball mortar and ball spare upper end set up, the lower extreme of ball spare sets up face of a column, face of a column portion cooperates with the outer mounting hole of cyclic annular slot tank bottom, set up the adjusting shim between the bottom of face of a column portion and the hole bottom of outer mounting hole, ball spare passes through the fastener and is connected with the axle housing.

Description

Tilting pad bearing

Technical Field

The utility model relates to a bearing, concretely relates to tilting pad bearing.

Background

At present, a tilting pad bearing for a high-speed rotating unit generally comprises a plurality of pad blocks, wherein an arc pad back eccentric to a rotating shaft is arranged on each pad block, so that the arc pad back is in line contact with a bearing shell, and therefore the pad blocks can swing in the circumferential direction, a wedge angle formed between the pad blocks and the surface of a shaft neck is changed, and the tilting pad bearing is suitable for different working conditions. When the radial bearing of the tilting pad works, the hydrodynamic pressure of a lubricating oil film acts on the pad surface and the journal surface to form a bearing oil wedge, and the bearing oil wedge completely separates the two surfaces from contact. Along with the change of the working condition of the bearing, the inclination of the tile surface and the thickness of an oil film can be changed, but the clearance ratio is not changed, and the oil wedge structure enables the tilting pad bearing to be an important structure for normal operation.

Disclosure of Invention

The utility model aims at prior art's not enough, provide a tilting pad bearing, it can be fast conveniently adjust radial clearance between the rotating surface of tilting pad bearing surface and pivot, helps forming the high-pressure oil film on the whole bearing surface of tilting pad, can make the oil film supporting structure of a plurality of tilting pads remain stable simultaneously.

The purpose of the utility model is realized like this: a tilting pad bearing, includes axle housing, its characterized in that: the novel tilting pad is characterized in that an annular groove is formed in the axle housing, at least three tilting pads arranged in the circumferential direction are arranged in the annular groove, an arc groove is formed in the side, close to the center, of each tilting pad, a gap is reserved between the back of each tilting pad and the bottom of the annular groove, an inner mounting hole is formed in the back of each tilting pad, a bearing seat is arranged in the inner mounting hole, a ball socket is arranged on the side, far away from the bearing seat, the ball socket is matched with a spherical part arranged at the upper end of a ball head piece, a column surface part is arranged at the lower end of the ball head piece, the column surface part is matched with an outer mounting hole at the bottom of the annular groove, an adjusting gasket is arranged between the bottom of the column surface part and the bottom of the outer mounting hole, and the ball head piece is connected with the axle housing through a fastener.

The ball head piece is provided with a connecting hole facing to the outer mounting hole, the shaft shell is provided with a first connecting bolt extending centripetally, and the inner extending end of the first connecting bolt penetrates through the adjusting gasket and is connected with the ball head piece connecting hole.

The shaft shell is provided with a stepped hole corresponding to the outer mounting hole, the large-diameter section of the stepped hole is communicated with the outer mounting hole through the small-diameter section of the stepped hole, the head of the first connecting bolt is matched in the large-diameter section of the stepped hole, and the rod of the first connecting bolt penetrates through the small-diameter section of the stepped hole.

The novel tilting pad is characterized in that a plurality of fan-shaped pads are mounted in the annular groove, the radial extending height of each fan-shaped pad is smaller than the radial extending height of the tilting pad, the fan-shaped pads and the tilting pads are arranged on the circumference alternately, gaps are reserved between the two sides of the circumference of each fan-shaped pad and the edges of the tilting pads respectively, a plurality of axially-arranged oil outlets are formed in the proximal end of the inner cavity of each fan-shaped pad, and the distal end of each fan-shaped pad is communicated with the oil inlet on the shaft shell through the oil inlet.

The shell area of the shaft shell corresponding to each fan-shaped tile is at least provided with two bolt counter bores, the bolt counter bores are matched with second connecting bolts, and the inward extending ends extending into the shaft shell in the second connecting bolts are in threaded connection with the fan-shaped tiles.

And a recess is arranged on the inner spherical surface of the ball socket.

The clearance between the outer edge of the adjusting gasket and the outer mounting hole is smaller than the clearance between the inner hole edge of the adjusting gasket and the rod part of the first connecting bolt.

The inner mounting hole is a stepped hole, and a stepped shaft matched with the inner mounting hole is arranged at the top of the supporting seat.

And the inner spherical surface of the ball socket and/or the outer spherical surface of the spherical surface part are/is provided with a wear-resistant layer.

By adopting the scheme, the tilting pad bearing device has the advantages that the tilting pads arranged along the circumferential direction support the rotating shaft on the circumference, the mounting seats in the inner mounting holes can be replaced in time after being worn, the radial gap tolerance caused by wear is prevented from being out of tolerance, the back of the tilting pads cannot be worn, the tilting pads can be self-adjusted according to working conditions by the cooperation of the ball sockets and the spherical parts, the tilting pads can freely swing along with the difference of rotating speed, load and bearing temperature, a plurality of oil wedges are formed around the rotating shaft, each oil film pressure always points to the center, and the tilting pad bearing device has high stability. The cooperation of the outer mounting hole of face of a column and cyclic annular slot tank bottom can fix a position the bulb spare, can bear the great load in the circumferencial direction simultaneously, can carry out quick and accurate regulation face of a sphere portion according to the actual demand through the gasket that uses different specifications, the radial position of mount pad and tilting pad, can be fast conveniently adjust radial clearance between the rotating surface of tilting pad bearing surface and pivot, help forming the high-pressure oil film on the whole bearing surface of tilting pad, can make the oil film bearing structure of a plurality of tilting pads remain stable simultaneously. The utility model discloses simple structure is convenient for make, and the equipment and the dismantlement of the bearing of being convenient for, and the maintenance cost is low, has higher economic nature.

The invention will be further explained with reference to the drawings and the specific embodiments.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic sectional view of the present invention.

In the drawing, 100 is a shaft housing, 110 is an annular groove, 111 is an outer mounting hole, 200 is a tilting pad, 210 is an arc groove, 220 is an inner mounting hole, 221 is a bump, 300 is a supporting seat, 310 is a ball socket, 400 is a ball head piece, 410 is a spherical part, 420 is a cylindrical part, 500 is a joint gasket, 600 is a first connecting bolt, 700 is a fan-shaped pad, 710 is a gap, 720 is an oil outlet, 730 is an oil inlet, 740 is a bolt counterbore, and 750 is a second connecting bolt.

Detailed Description

Specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 2, an embodiment of a tilting pad bearing, includes a shaft housing 100, which may be a unitary structure or a split structure, for example, two semicircular shells are assembled together to form a shaft housing structure, and an annular groove 110 is disposed in the shaft housing 100, and provides a mounting space for a tilting pad, and also prevents the tilting pad from slipping axially. At least three tilting pads 200 arranged along the circumferential direction are mounted in the annular groove 110, an arc groove 210 is formed on the side close to the center of each tilting pad 200, a gap is reserved between the back of each tilting pad 200 and the bottom of the annular groove 110, an inner mounting hole 220 is formed in the back of each tilting pad 200, a supporting seat 300 is mounted in each inner mounting hole 220, each inner mounting hole 220 can be a stepped hole 221, a stepped shaft matched with each inner mounting hole is arranged at the top of each supporting seat 300, and by adopting the matching structure, the inner mounting holes 220 can be supported, and meanwhile, the strength weakening phenomenon caused by machining of the inner mounting holes of the tilting pads can be reduced. Bearing 300 telecentric side sets up ball socket 310, ball socket 310 cooperates with spherical portion 410 that bulb piece 400 upper end set up, set up on the interior sphere of ball socket 310 and cave in, should cave in and can be the through-hole, also can the blind hole, sets up sunken frictional area that can reduce, can be convenient for the nimble swing of ball socket and spherical portion. The inner spherical surface of the ball socket 310 and/or the outer spherical surface of the spherical part 410 are provided with a wear-resistant layer, which can be made of copper-based alloy; of course, the inner spherical surface and/or the spherical surface portion may be integrally made of a wear-resistant material, and the surface of the inner spherical surface and/or the spherical surface portion includes a wear-resistant layer. The lower extreme of bulb 400 sets up face of a column portion 420, face of a column portion 420 and the cooperation of the outer mounting hole 111 of annular slot 110 tank bottom, set up adjusting shim 500 between the bottom of face of a column portion 420 and the hole bottom of outer mounting hole 111, bulb 400 is connected with axle housing 100 through the fastener. In this embodiment, the shaft housing 100 is provided with a first connecting bolt extending centripetally, the first connecting bolt is a fastener, the shaft housing 100 may be provided with a stepped hole corresponding to the outer mounting hole 111, a major diameter section of the stepped hole is communicated with the outer mounting hole 111 through a minor diameter section of the stepped hole, a head of the first connecting bolt 600 is fitted in the major diameter section of the stepped hole, and a rod of the first connecting bolt 600 passes through the minor diameter section of the stepped hole; the ball piece 400 is provided with a connecting hole facing the outer mounting hole 111, the inner extending end of the first connecting bolt penetrates through the adjusting gasket 500 and is connected with the connecting hole of the ball piece 400, and the ball piece is fixed through the first connecting bolt. Further, the gap 710 between the outer edge of the adjusting washer 500 and the outer mounting hole 111 is smaller than the gap 710 between the inner hole edge of the adjusting washer 500 and the rod part of the first connecting bolt, and by adopting the structure, the interference between the inner hole of the adjusting washer and the thread of the first connecting bolt can be prevented, and the thread can be prevented from being damaged.

Further, a plurality of fan-shaped pads 700 are mounted in the annular groove 110, the radial extension height of the fan-shaped pads 700 is smaller than the radial extension height of the tilting pad, the fan-shaped pads 700 and the tilting pad 200 are alternately arranged on the circumference, gaps 710 are respectively reserved between the two sides of the circumference of the fan-shaped pads 700 and the edge of the tilting pad 200, a plurality of axially-arranged oil outlets 720 are arranged at the proximal end of the inner cavity of the fan-shaped pads 700, the distal end of the fan-shaped pads 700 is communicated with the oil inlet 730 on the shaft housing 100 through the oil inlet 730, and the provision of the fan-shaped pads 700 can facilitate the supply of lubricating oil and is also beneficial to the formation of oil films in the inner hole of the tilting pad bearing. The casing region of every fan-shaped tile 700 that axle housing 100 corresponds sets up two bolt counter bores 740 at least, cooperate second connecting bolt 750 in the bolt counter bore 740, the end that stretches into of axle housing 100 in the second connecting bolt 750 is connected with fan-shaped tile 700 threaded connection, realizes the detachable of fan-shaped tile 700 and axle housing and is connected.

When the scheme is adopted for supporting the rotating shaft, the rotating shaft is supported on the circumference through the tilting pads 200 arranged along the circumferential direction, the mounting seats in the inner mounting holes can be replaced in time after being worn, the radial clearance overproof caused by wear is prevented, the tilting pads can be self-adjusted according to working conditions by matching the ball sockets and the spherical parts, the tilting pads can freely swing along with the difference of rotating speed, load and bearing temperature, and a plurality of oil wedges are formed around the rotating shaft. The radial positions of the spherical surface part, the mounting seat and the tilting pad can be quickly and accurately adjusted according to actual requirements by using gaskets with different specifications, namely, the radial clearance between the tilting pad bearing surface and the rotating surface of the rotating shaft can be quickly and conveniently adjusted, a high-pressure oil film is formed on the whole bearing surface of the tilting pad, and the oil film bearing structures of a plurality of tilting pads can be kept stable at the same time. The utility model discloses simple structure is convenient for make, and the equipment and the dismantlement of the bearing of being convenient for, and the maintenance cost is low, has higher economic nature.

It should be understood that any modification, equivalent replacement, and improvement made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. A tilting pad bearing comprising a shaft housing (100), characterized in that: the novel tilting pad is characterized in that an annular groove (110) is arranged in the shaft shell (100), at least three tilting pads (200) arranged along the circumferential direction are installed in the annular groove (110), an arc groove (210) is formed in the proximal side of each tilting pad (200), a gap is reserved between the back of each tilting pad (200) and the bottom of the annular groove (110), an inner installation hole (220) is formed in the back of each tilting pad (200), a supporting seat (300) is installed in each inner installation hole (220), a ball socket (310) is arranged on the far side of each supporting seat (300), the ball socket (310) is matched with a spherical surface portion (410) arranged at the upper end of a ball head piece (400), a column surface portion (420) is arranged at the lower end of the ball head piece (400), the column surface portion (420) is matched with an outer installation hole (111) at the bottom of the annular groove (110), an adjusting gasket (500) is arranged between the bottom of the column surface portion (420) and the bottom of the outer installation hole (111), the ball piece (400) is connected to the axle housing (100) by a fastener.

2. A tilting pad bearing according to claim 1, wherein: the ball head piece (400) is provided with a connecting hole facing the outer mounting hole (111), the shaft shell (100) is provided with a first connecting bolt extending centripetally, and the inner extending end of the first connecting bolt penetrates through the adjusting gasket (500) and is connected with the connecting hole of the ball head piece (400).

3. A tilting pad bearing according to claim 2, wherein: the shaft shell (100) is provided with a stepped hole corresponding to the outer mounting hole (111), the large-diameter section of the stepped hole is communicated with the outer mounting hole (111) through the small-diameter section of the stepped hole, the head of the first connecting bolt (600) is matched in the large-diameter section of the stepped hole, and the rod of the first connecting bolt (600) penetrates through the small-diameter section of the stepped hole.

4. A tilting pad bearing according to claim 1, wherein: the clearance (710) between the outer edge of the adjusting gasket (500) and the outer mounting hole (111) is smaller than the clearance (710) between the inner hole edge of the adjusting gasket (500) and the rod part of the first connecting bolt.

5. A tilting pad bearing according to claim 1, wherein: a plurality of fan-shaped pads (700) are installed in the annular groove (110), the height of radial extension of the fan-shaped pads (700) is smaller than the height of radial extension of the tilting pad, the fan-shaped pads (700) and the tilting pad (200) are arranged on the circumference in an alternating mode, gaps (710) are respectively reserved between the two sides of the circumference of the fan-shaped pads (700) and the edge of the tilting pad (200), a plurality of axially-arranged oil outlets (720) are arranged at the proximal end of the inner cavity of the fan-shaped pads (700), and the distal end of the fan-shaped pads (700) is communicated with the oil inlet (730) on the shaft shell (100) through the oil inlet (730).

6. A tilting pad bearing according to claim 5, wherein: the shaft shell (100) is provided with at least two bolt counter bores (740) corresponding to the shell area of each fan-shaped tile (700), the bolt counter bores (740) are matched with second connecting bolts (750), and the inward extending ends extending into the shaft shell (100) in the second connecting bolts (750) are in threaded connection with the fan-shaped tiles (700).

7. A tilting pad bearing according to claim 1, wherein: and a recess is arranged on the inner spherical surface of the ball socket (310).

8. A tilting pad bearing according to claim 1, wherein: the inner mounting hole (220) is a stepped hole, and a stepped shaft matched with the inner mounting hole is arranged at the top of the supporting seat (300).

9. A tilting pad bearing according to claim 1, wherein: the inner spherical surface of the ball socket (310) and/or the outer spherical surface of the spherical surface part (410) are/is provided with a wear-resistant layer.