1. The utility model provides a radial and large-scale tilting pad bearing of circumference fulcrum coefficient adjustable, its characterized in that, including bearing frame a (2) and bearing frame b (5), bearing frame a (2) and bearing frame b (5) form annular structure, are located annular structure inner circle central point and put and be provided with axle journal (1), be equipped with a plurality of axle journals (16) along circumferencial direction evenly distributed between axle journal (1) and the bearing frame, axle journal (16) inner is through smooth arc surface and axle journal (1) partial contact, and axle journal (16) front and back terminal surface is connected with the bearing frame through peg (7) respectively, forms the revolute pair of spherical surface contact between peg (7) front end and axle journal (16), and peg (7) rear end is connected with the bearing frame through the screw thread, and the bearing frame is used through the cooperation of bolt an (6) and cylindric lock a (3) and is connected.

2. The large tilting pad bearing with adjustable radial and circumferential fulcrum coefficients as claimed in claim 1, wherein the bearing seat a (2) is welded with a bearing frame (8), the bearing frame (8) is fixedly supported on the worm (11) through a bearing a (21) and a bearing b (24), one end of the bearing a (21) is axially positioned through a blank cap (20), the blank cap (20) is connected with the bearing frame (8) and a gland a (10) through a bolt d (13), the bearing a (21) is radially positioned through the combined action of the gland a (10) and the bearing frame (8), the gland a (10) is connected with the bearing frame (8) through a bolt c (9), one end of the bearing b (24) is axially positioned through a transparent cap (22), the transparent cap (22) is connected with the bearing frame (8) and the gland b (12) through the bolt d (13), and carry out radial positioning to bearing b (22) through gland b (12) and bearing bracket (8) combined action, gland b (12) and bearing bracket (8) realize being connected through bolt c (9), worm (11) are close to through lid (22) one end card have pointer (23) and weld with hand wheel (14), worm (11) and worm wheel b (17), worm wheel a (19) carry out the transmission fit, two worm wheels are connected the cooperation through the form that bolt b (4) and cylindric lock b (18) cooperation were used.

3. A large tilting pad bearing with adjustable radial and circumferential fulcrum coefficients according to claim 2, characterized in that the worm wheel a (19) and the worm wheel b (17) are connected with the adjusting support pin (15) through threads, and one end of the adjusting support pin (15) is in spherical contact with the pad back of the bearing pad (16).

4. A large tilting pad bearing with adjustable radial and circumferential fulcrum coefficients according to claim 2, characterized in that the transparent cover (22) is provided with a dial for reading the circumferential rotation angle of the fulcrum when the circumferential position of the tilting pad bearing is adjusted.

5. A large tilting pad bearing with adjustable radial and circumferential fulcrum coefficients according to claim 2, characterized in that the worm wheel b (17) and the worm wheel a (19) are provided with scales for reading the fulcrum radial adjusting distance when the radial position of the tilting pad bearing is adjusted.

6. A large tilting pad bearing with adjustable radial and circumferential pivot coefficients according to claim 2, characterized in that the bearing pads (16) are formed with uniformly distributed pits, and the setting angles of the pits are adjusted according to the number and size of the bearing pads (16).

7. A large tilting pad bearing with adjustable radial and circumferential pivot coefficients as claimed in claim 2, wherein the bearing seat a (2) and the bearing seat b (5) are provided with asymmetric open slots, and the open slots are arranged corresponding to the pits on the bearing bush (16).

Background

The bearing bush of the tilting pad bearing can freely swing along with the changes of the rotating speed, the load and the oil temperature of the bearing, so that the tilting pad bearing is automatically adjusted to the optimal position for forming the oil wedge, and has the advantages of good stability and large bearing capacity, the tilting pad bearing has the advantages of unlimited size, convenience in installation and the like, and the tilting pad bearing is widely applied to large-scale rotating equipment such as a steam turbine, a water turbine and the like. However, due to the limitation of the severe working conditions, the overlarge volume and other conditions of the equipment, the size of the tilting pad bearing used on the equipment is correspondingly increased, and in order to improve the stability and the bearing capacity of the large tilting pad bearing, the position of the fulcrum of the tilting pad bearing can be adjusted to a certain extent.

At present, in a bearing bush of a large tilting-pad bearing, axial positioning is mostly carried out by screws or cylindrical pins, and radial and circumferential positions of a bearing bush fulcrum cannot be adjusted. Patent 201410217593.7 discloses a radial adjustable tilting pad bearing, which realizes radial adjustment during the installation of a bearing bush by changing the thickness and the number of adjusting washers, and this adjusting method can realize the radial position adjustment of the bearing bush, but is limited by the adjusting washers, and this adjusting method lacks certain flexibility, and for the circumferential position adjustment of a large tilting pad bearing, no relevant patent at present proposes a corresponding solution.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a large tilting pad bearing with adjustable radial and circumferential fulcrum coefficients, which is used for solving the problem of adjusting the position of a bearing pad fulcrum of the tilting pad bearing in large-scale rotating equipment so as to improve the stability and the bearing capacity of the tilting pad bearing.

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

a large tilting pad bearing with adjustable radial and circumferential fulcrum coefficients comprises a bearing seat a2 and a bearing seat b5, wherein the bearing seat a2 and the bearing seat b5 form an annular structure, a journal 1 is arranged at the center position of an inner ring of the annular structure, a plurality of bearing pads 16 which are uniformly distributed along the circumferential direction are arranged between the journal 1 and the bearing seat, the inner end of each bearing pad 16 is partially contacted with the corresponding journal 1 through a smooth arc surface, the front end surface and the rear end surface of each bearing pad 16 are respectively connected with the bearing seats through hanging pins 7, spherical contact revolute pairs are formed between the front ends of the hanging pins 7 and the bearing pads 16, the rear ends of the hanging pins 7 are connected with the bearing seats through threads, and the bearing seats are connected through the matching use of bolts a6 and cylindrical pins a 3.

The bearing seat a2 is welded with a bearing frame 8, the bearing frame 8 fixedly supports the worm 11 through a bearing a21 and a bearing b24, one end of the bearing a21 is axially positioned through a blank cap 20, the blank cap 20 is connected with the bearing frame 8 and a gland a10 through bolts d13, the bearing a21 is positioned radially under the combined action of the gland a10 and the bearing frame 8, the gland a10 is connected with the bearing frame 8 through a bolt c9, one end of the bearing b24 is positioned axially through the transparent cover 22, the transparent cover 22 is connected with the bearing frame 8 and the gland b12 through a bolt d13, the bearing b22 is positioned radially under the combined action of the gland b12 and the bearing frame 8, the gland b12 is connected with the bearing frame 8 through a bolt c9, one end of the worm 11, which is close to the transparent cover 22, is clamped with the pointer 23 and is welded with the hand wheel 14, the worm 11 is in transmission fit with the worm wheel b17 and the worm wheel a19, and the two worm wheels are connected and matched in a mode of matching with the cylindrical pin b18 through a bolt b 4.

The worm wheel a19 and the worm wheel b17 are connected with the adjusting support pin 15 through threads, and one end of the adjusting support pin 15 is in spherical contact with the pad back of the bearing pad 16.

The through cover 22 is provided with a dial scale for reading the circumferential rotation angle of the fulcrum when the circumferential position of the tilting pad bearing is adjusted.

And dial scales are processed on the worm wheel b17 and the worm wheel a19 and are used for reading the radial adjustment distance of the fulcrum when the radial position of the tilting pad bearing is adjusted.

Pits which are uniformly distributed are processed on the bearing bushes 16, and the setting angles of the pits are adjusted according to the number and the size of the bearing bushes 16.

Asymmetric open grooves are formed in the bearing seat a2 and the bearing seat b5 and are arranged corresponding to the concave pits in the bearing bush 16.

The invention has the beneficial effects that:

the adjusting mode has certain flexibility, simple and compact structure, low manufacturing cost and capability of reducing the installation difficulty and improving the stability and the bearing capacity of the tilting pad bearing.

Drawings

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

Fig. 2 is a schematic view of the internal structure of the present invention.

Fig. 3 is a schematic view of the structure of the transparent cover of the present invention.

Fig. 4 is a schematic view of the worm gear of the present invention.

Fig. 5 is a schematic structural view of the bearing bush of the present invention.

Fig. 6 is a schematic view of the bearing seat structure of the present invention.

In the figure, 1, a journal, 2, a bearing seat a, 3, a cylindrical pin a, 4, a bolt b, 5, a bearing seat b, 6, a bolt a, 7, a hanging pin, 8, a bearing frame, 9, a bolt c, 10, a gland a, 11, a worm, 12, a gland b, 13, a bolt d, 14, a hand wheel, 15, an adjusting support pin, 16, a bearing bush, 17, a worm wheel b, 18, a cylindrical pin b, 19, a worm wheel a, 20, a closed cover, 21, a bearing a, 22, a transparent cover, 23, a pointer and 24, and a bearing b are arranged.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The invention discloses a large tilting pad bearing with adjustable radial and circumferential fulcrum coefficients, which is structurally shown in fig. 1 and fig. 2, wherein a journal 1 is positioned at the central position of inner rings of a bearing seat a2 and a bearing seat b5, a plurality of bearing pads 16 uniformly distributed along the circumferential direction are arranged between the journal 1 and the bearing seats a2 and b5, the inner ends of the bearing pads 16 are partially contacted with the journal 1 through smooth arc surfaces, two end surfaces of each bearing pad 16 are respectively connected with the bearing seats a2 and b5 through a hanging pin 7, a spherical contact rotating pair is formed between the front end of the hanging pin 7 and the bearing pad 16, the rear end of the hanging pin 7 is connected with the bearing seats a2 and b5 through threads, and the bearing seats a2 and b5 are connected with a cylindrical pin a3 through the matching use of a bolt a 6.

A bearing frame 8 is welded on a bearing seat a2, a worm 11 is fixedly supported on the bearing frame 8 through a bearing a21 and a bearing b24, one end of the bearing a21 is axially positioned through a blank cap 20, the blank cap 20 is connected with the bearing frame 8 and a gland a10 through bolts d13, the bearing a21 is radially positioned through the combined action of the gland a10 and the bearing frame 8, the gland a10 is connected with the bearing frame 8 through bolts c9, one end of the bearing b24 is axially positioned through a transparent cover 22, the transparent cover 22 is connected with the bearing frame 8 and the gland b12 through bolts d13, the bearing b22 is radially positioned through the combined action of the gland b12 and the bearing frame 8, the gland b12 is connected with the bearing frame 8 through bolts c9, a pointer 23 is clamped at one end of the worm 11 close to the transparent cover 22 and is welded with the hand wheel 14, the worm 11 is in transmission fit with a worm wheel b and a worm wheel a19, and the worm wheel is divided into a worm wheel a19, The worm wheel b17 is in two parts, and the two worm wheels are connected and matched in a mode that a bolt b4 is matched with a cylindrical pin b 18.

The worm wheel a19 and the worm wheel b17 are connected with the adjusting support pin 15 through threads, and one end of the adjusting support pin 15 is in spherical contact with the shoe back of the bearing bush 16.

As shown in fig. 3, a dial is formed on the transparent cover 22 for reading the circumferential rotation angle of the fulcrum when the circumferential position of the tilting pad bearing is adjusted.

As shown in fig. 4, the worm wheel b and the worm wheel a19 are provided with dials for reading the radial adjustment distance of the fulcrum when the radial position of the tilting pad bearing is adjusted.

As shown in fig. 5, the bearing pads 16 are formed with uniformly distributed pits, and the setting angles of the pits are designed according to the number and size of the bearing pads 16, and the present invention sequentially designs the pit angles of 0.5, 0.55, 0.65, 0.75, and 0.8 according to the size and number of the bearing pads 16.

As shown in fig. 6, the bearing seat a2 and the bearing seat b5 are provided with asymmetric open grooves, and the design of the open grooves mainly depends on the number and size of the pits on the bearing shell 16.

The working principle of the invention is as follows:

step one, rotating an adjusting hand wheel 14 according to working conditions, and driving an adjusting support pin 15 to rotate to a proper circumferential position by means of the transmission action of a worm gear pair according to a dial on a transparent cover 22, so that the circumferential position of a bearing bush fulcrum of the tilting pad bearing is adjusted;

and step two, when the tilting pad bearing is adjusted to a proper circumferential position, the adjusting and supporting pin 15 is rotated, and the adjusting and supporting pin 15 is adjusted to a proper position according to dials on the worm wheel b17 and the worm wheel a19 under the transmission action of threads, so that the radial position of the tilting pad bearing bush is adjusted.

According to the large tilting pad bearing with the adjustable radial and circumferential fulcrum coefficients, the circumferential position of the fulcrum of the pad is adjusted through the transmission action of the worm and worm gear pair, and the radial position of the fulcrum of the pad is adjusted through thread transmission.