CN211059196U

CN211059196U - Novel double-arc self-adjusting tilting pad

Info

Publication number: CN211059196U
Application number: CN201922225839.6U
Authority: CN
Inventors: 黄利明
Original assignee: Zhuji Jiyang Sliding Bearing Co ltd
Current assignee: Zhuji Jiyang Sliding Bearing Co ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-07-21
Anticipated expiration: 2029-12-13

Abstract

The utility model discloses a novel double-arc self-adjusting tilting pad, which belongs to the technical field of bearings and comprises a bearing pad body and a tilting pad, wherein the tilting pad is positioned at the inner side of the bearing pad body and is abutted against the inner end of an adjusting nut, a plurality of adjusting holes are drilled on the bearing pad body, a threaded lead screw is arranged in each adjusting hole, the adjusting nut is connected on the threaded lead screw in a threaded manner, a pair of symmetrically distributed connecting rods are fixedly connected at the outer end of the adjusting nut, a pushing plate is arranged between the threaded lead screw and the tilting pad and is fixedly connected with the pair of connecting rods, a connecting block is fixedly connected at one end of the pushing plate close to the tilting pad, an adjusting cushion block is fixedly connected at one end of the connecting block close to the tilting pad, counter bores matched with the adjusting cushion block are drilled at the outer end of the tilting pad, so that the anti-loosening effect after adjustment can be improved on the basis of accurately adjusting the tilting pad, the operation is simple, the stability is high, and the bearing is suitable for large-scale bearings.

Description

Novel double-arc self-adjusting tilting pad

Technical Field

The utility model relates to a bearing technical field, more specifically say, relate to a novel biarc self-interacting tilting pad piece.

Background

Nowadays, as machines such as steam turbines, centrifugal compressors, generators, and exciters are developed to high speed and high power, tilting pad bearings with high stability are applied more and more widely.

The tilting pad bearing utilizes that each pad can slightly swing around an acting force point to adapt to a proper working position, so that each pad can form a convergent oil wedge, the oil wedge formed by the pad and a shaft neck can be automatically adjusted under the condition that operating parameters (load, speed, lubricating oil viscosity and the like) are changed, oil film force generated on each pad passes through a fulcrum and the shaft neck center, namely, external load is always kept to be crossed to one point, and thus, a tangential component force for whirling the shaft neck is not generated. When the bearing works, a bearing oil film is formed between the tile surface and the journal surface under the action of the fluid pressure of the lubricating oil film, so that the two surfaces are prevented from being in direct contact, the bearing has higher stability, and the oil film can be completely prevented from vibrating. The tilting pad bearing is most advantageous in all radial bearings (including three-oil-wedge, four-oil-wedge, elliptical bearing and cylindrical bearing) in the aspects of stability, bearing capacity, power consumption, temperature rise and other performances. However, the position of the tilting pad in the existing tilting pad bearing cannot be accurately adjusted, and the lubricating effect of an oil wedge between the pad and a journal can be effectively improved by realizing accurate adjustment.

Chinese Utility model No. CN207777403U discloses a radial tilting pad sliding bearing with adjustable gap, which comprises an annular bearing pad body and tilting pads, wherein the tilting pads are distributed on the inner side of the bearing pad body, the side walls of the tilting pads are abutted against a baffle, a counter bore is formed in the middle of the outer wall of the tilting pad, an adjusting bolt opposite to the tilting pads is screwed on the bearing pad body, a cylindrical plug is formed at the bottom end of the adjusting bolt, the plug is inserted in the counter bore of the tilting pad, an adjusting cushion block is inserted in the counter bore of the tilting pad, two end faces of the adjusting cushion block are respectively abutted against the bottom face and the plug of the counter bore of the tilting pad, a concave platform is formed on the outer wall of the bearing pad body at the outer end of the adjusting bolt, scales are inserted and fixed in the concave platform, the scale cushion block is inserted and sleeved on the adjusting bolt, a scale groove with annular distribution is formed on the scale cushion block, a ring platform is formed on the outer end of the adjusting bolt, the ring table is provided with a pointer groove opposite to the scale groove.

Although the above scheme can realize accurate adjustment of the tilting pad and improve the lubricating effect of an oil wedge between the tilting pad and a journal, in the working process of the tilting pad, besides the adjustment of the swing between the cushion block and the tilting pad, a certain loosening error exists in a non-fixed mode of the adjusting bolt, and especially under the conditions of high-vibration working conditions and high-precision requirements, once the adjusting bolt loosens, the tilting pad is easy to fail and even the bearing runs and fails.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

To the problem that exists among the prior art, the utility model aims to provide a novel biarc self-interacting tilting pad piece, it can realize on the basis of accurate adjustment tilting pad piece, improves the locking effect of moving after adjusting, easy operation, and stability is high, is applicable to bigger bearing.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

A novel double-arc self-adjusting tilting pad comprises a pad body and a tilting pad, wherein the tilting pad is positioned on the inner side of the pad body and is abutted against the inner end of an adjusting nut, a plurality of adjusting holes are formed in the pad body, a threaded lead screw is arranged in each adjusting hole, the threaded lead screw is in threaded connection with an adjusting nut, the outer end of the adjusting nut is fixedly connected with a pair of symmetrically distributed connecting rods, a push plate is arranged between the threaded lead screw and the tilting pad and is fixedly connected with the pair of connecting rods, one end of the push plate close to the tilting pad is fixedly connected with a connecting block, one end of the connecting block close to the tilting pad is fixedly connected with an adjusting cushion block, the outer end of the tilting pad is provided with a counter bore matched with the adjusting cushion, one end of the threaded lead screw far away from the push plate is fixedly connected with a rotating rod, the outer end of the pad is fixedly connected with a plurality of stabilizing rings matched with the adjusting holes, the utility model discloses a tilting pad, including stabilizer ring, dwang, elastic telescopic rod, stabilizer ring outer end fixedly connected with control ring, and the dwang runs through the stabilizer ring and extends to in the control ring, the annular wave groove has been dug to the control ring inner end, annular wave groove includes a plurality of interval distribution's concave part and bellying, dwang outer end fixedly connected with elastic telescopic rod, elastic telescopic rod keeps away from dwang one end fixedly connected with and concave part assorted hemisphere fixture block, can realize on the basis of accurate regulation tilting pad, improves the locking effect of moving after adjusting, easy operation, and stability is high, is applicable to bigger bearing.

Further, the equal fixedly connected with T type slider in both ends about the slurcam, all open on the regulation hole both ends pore wall chisel have with T type slider assorted spout, and sliding connection between T type slider and the spout, guide effect when the slurcam removes can be realized to cooperation between T type slider and the spout on the one hand, and then indirectly promotes the regulation precision of adjusting the cushion, and on the other hand plays the limiting displacement to adjusting nut, makes it be horizontal migration under the rotary action of threaded lead screw, improves driven stability.

Further, the control ring outer end is excavated there is a plurality of evenly distributed's screw hole, and the screw hole is linked together with concave part, screw hole female connection has locking screw, the dwang one end is kept away from to the hemisphere fixture block and is excavated have with locking screw assorted thread groove, through twist the control ring into realize the fixed to the hemisphere fixture block to the thread groove in, make it unable continuation removal, the indirect effect of splining that realizes the dwang accomplishes the fixed after the accurate regulation of tilting pad.

Further, dwang outer end fixedly connected with swivel becket, the inner division of stabilizer ring have with swivel becket assorted ring channel, cooperation between swivel becket and the ring channel improves dwang pivoted stability on the one hand, including the screw lead screw, on the other hand can carry on spacingly to the swivel becket, avoids it not hard up sliding in the stabilizer ring.

Furthermore, the tilting pads are at least provided with 3 tilting pads, and the tilting pads are distributed around the central axis of the bearing pad body in an annular array, so that the balance among loads can be kept, and the working stability of the bearing is improved.

Furthermore, the inner end of the bearing bush body is fixedly connected with a lining, the cross section of the lining is arc-shaped, the consistency of the thickness of an oil film is improved, and the matching degree of the tilting pad and the shaft clearance fit is further improved.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

(1) the tilting pad adjusting mechanism has the advantages that the anti-loosening effect after adjustment is improved on the basis of accurately adjusting the tilting pads, the operation is simple, the stability is high, and the tilting pad adjusting mechanism is suitable for large bearings.

(2) The equal fixedly connected with T type slider in both ends about the slurcam, all open on the regulation hole both ends pore wall chisel have with T type slider assorted spout, and sliding connection between T type slider and the spout, guide effect when the slurcam is removed can be realized on the one hand in cooperation between T type slider and the spout, and then the indirect regulation precision that promotes the regulation cushion, on the other hand plays the limiting displacement to adjusting nut, make it be horizontal migration under the rotary action of screw lead screw, improve driven stability.

(3) The control ring outer end is excavated there is a plurality of evenly distributed's screw hole, and the screw hole is linked together with concave part, and screw hole female connection has locking screw, and the dwang one end is kept away from to the hemisphere fixture block chisel have with locking screw assorted thread groove, through twist the control ring into realize the fixed to the hemisphere fixture block to the thread groove in, make it unable continuation removal, and indirect realization is to the effect of splining of dwang, and the completion is fixed after the accurate regulation of tilting pad.

(4) Dwang outer end fixedly connected with rotating ring, the opening chisel have with rotating ring assorted ring channel in the stabilizer ring, cooperation between rotating ring and the ring channel improves dwang pivoted stability on the one hand, including the screw lead screw, on the other hand can carry on spacingly to the dwang, avoids its not hard up slip in the stabilizer ring.

(5) The tilting pads are at least provided with 3 tilting pads, and the tilting pads are distributed around the central axis of the axle bush body in an annular array, so that the balance among loads can be kept, and the working stability of the bearing is improved.

(6) The inner end of the bearing bush body is fixedly connected with a lining, the cross section of the lining is arc-shaped, the thickness consistency of an oil film is improved, and the matching degree of the tilting pad and the shaft in clearance fit is further improved.

Drawings

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

FIG. 2 is a schematic view of the structure at A in FIG. 1;

fig. 3 is a schematic structural diagram of the control ring part of the present invention.

The reference numbers in the figures illustrate:

the device comprises a bearing bush body 1, a tilting pad 2, a counter bore 3, an adjusting cushion block 4, a threaded lead screw 5, an adjusting nut 6, a connecting block 7, a pushing plate 8, a connecting rod 9, a rotating rod 10, a rotating ring 11, a stabilizing ring 12, a control ring 13, a sliding block 14T, an annular wave groove 15, an elastic telescopic rod 16, a hemispherical clamping block 17, a locking screw 18 and a lining 19.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-2, a novel double-arc self-adjusting tilting pad comprises a pad body 1 and a tilting pad 2, the tilting pad 2 is located inside the pad body 1, the tilting pad 2 abuts against the inner end of an adjusting nut 6, a plurality of adjusting holes are drilled on the pad body 1, threaded screws 5 are arranged in the adjusting holes, the adjusting nuts 6 are connected to the threaded screws 5 through threads, the rotating motion of the threaded screws 5 can be converted into the horizontal movement of the adjusting nuts 6 through the cooperation between the threaded screws 5 and the adjusting nuts 6, a pair of symmetrically distributed connecting rods 9 are fixedly connected to the outer ends of the adjusting nuts 6, a pushing plate 8 is arranged between the threaded screws 5 and the tilting pad 2, the pushing plate 8 is fixedly connected to the pair of connecting rods 9, T-shaped sliders 14 are fixedly connected to the left end and the right end of the pushing plate 8, chutes matched with the T-shaped sliders 14 are drilled on the hole walls of the two ends of the adjusting holes, and the T-shaped sliding block 14 is connected with the sliding chute in a sliding manner, the T-shaped sliding block 14 and the sliding chute are matched to realize a guiding effect when the pushing plate 8 moves so as to indirectly promote the adjustment accuracy of the adjusting cushion block 4, and the T-shaped sliding block 14 and the sliding chute are matched to play a role in limiting the adjusting nut 6 so as to enable the pushing plate to horizontally move under the rotating action of the threaded screw 5 so as to improve the transmission stability, one end, close to the tilting pad 2, of the pushing plate 8 is fixedly connected with a connecting block 7, one end, close to the tilting pad 2, of the connecting block 7 is fixedly connected with the adjusting cushion block 4, the outer end of the tilting pad 2 is provided with a counter bore 3 matched with the adjusting cushion block 4, the adjusting cushion block 4 is matched with the counter bore 3 so as to realize the accurate adjustment of the tilting pad 2, one end, far away from the pushing plate 8, of the threaded screw 5 is fixedly connected with a rotating rod 10, dwang 10 outer end fixedly connected with rotating ring 11, the chisel have with rotating ring 11 assorted ring channel in the stabilizer ring 12 inner, cooperation between rotating ring 11 and the ring channel improves dwang 10 pivoted stability on the one hand, including threaded lead screw 5, on the other hand can carry on spacingly to dwang 10, avoids it not hard up in stabilizer ring 12 to slide, stabilizer ring 12 outer end fixedly connected with control ring 13, and dwang 10 runs through stabilizer ring 12 and extends to in the control ring 13.

Referring to fig. 3, an inner end of the control ring 13 is cut with an annular wave groove 15, the annular wave groove 15 includes a plurality of groove portions and protruding portions which are distributed at intervals, an outer end of the rotating rod 10 is fixedly connected with an elastic telescopic rod 16, can stretch and contract to meet the requirement that the hemispherical fixture block 17 moves from the groove part to the bulge part, one end of the elastic telescopic rod 16 far away from the rotating rod 10 is fixedly connected with the hemispherical fixture block 17 matched with the groove part, the outer end of the control ring 13 is provided with a plurality of threaded holes which are uniformly distributed, and the threaded hole is communicated with the groove part, the threaded hole is internally connected with a locking screw 18, one end of the hemispherical fixture block 17 far away from the rotating rod 10 is provided with a threaded groove matched with the locking screw 18, the control ring 13 is screwed into the thread groove to fix the hemispherical fixture block 17, so that the hemispherical fixture block cannot move continuously, the rotation stopping effect on the rotating rod 10 is indirectly realized, and the tilting pad 2 is fixed after being accurately adjusted.

Referring to fig. 1, at least 3 tilting pads 2, in this embodiment 4 tilting pads 2 are provided, and the tilting pads 2 are distributed in an annular array around the central axis of the bearing bush body 1, so as to maintain the balance between loads and improve the stability of the bearing operation, the inner end of the bearing bush body 1 is fixedly connected with a lining 19, and the cross section of the lining 19 is in an arc shape, so as to improve the consistency of the oil film thickness, and further improve the matching degree of the tilting pads 2 and the shaft clearance fit.

During adjustment, a user can indirectly drive the threaded lead screw 5 to rotate by rotating the rotating rod 10 according to actual conditions, the adjusting nut 6 starts to move along with the threaded lead screw, and after the linkage action of the connecting rod 9, the pushing plate 8 and the connecting block 7, the adjusting cushion block 4 is matched with the counter bore 3 to realize the gap adjustment of the tilting pad 2, in the adjusting process, under the telescopic action of the elastic telescopic rod 16, the hemispherical fixture block 17 reaches the next groove part from the groove part through the bulge part, the rotating angle is an adjusting unit, the adjusting gap of the adjusting cushion block 4 is fixed at the moment, so the user can determine the rotating number of the groove part according to the gap to be adjusted, the user can conveniently and accurately adjust the gap, finally, the fixing of the hemispherical fixture block 17 is realized by screwing the locking screw 18 to be inserted into the threaded groove, the fixing after the adjustment is finished, compared with the prior art, the utility model can realize the accurate adjustment of the tilting pad, the anti-loosening effect after adjustment is improved, the operation is simple, the stability is high, and the anti-loosening device is suitable for large bearings.

The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims

1. The utility model provides a novel biarc self-interacting tilting pad piece, includes axle bush body (1) and tilting pad piece (2), tilting pad piece (2) are located the inboard of axle bush body (1), and tilting pad piece (2) and adjusting nut (6) inner offset, its characterized in that: a plurality of adjusting holes are drilled in the bearing block body (1), threaded screws (5) are arranged in the adjusting holes, adjusting nuts (6) are connected to the threaded screws (5) in a threaded mode, a pair of symmetrically distributed connecting rods (9) are fixedly connected to the outer ends of the adjusting nuts (6), a pushing plate (8) is arranged between the threaded screws (5) and the tilting pads (2), the pushing plate (8) is fixedly connected with a pair of connecting rods (9), the pushing plate (8) is close to one ends of the tilting pads (2), connecting blocks (7) are close to one ends of the tilting pads (2) and are fixedly connected with adjusting cushion blocks (4), counter bores (3) matched with the adjusting cushion blocks (4) are drilled in the outer ends of the tilting pads (2), and rotating rods (10) fixedly connected with one ends of the pushing plate (8) are far away from the threaded screws (5), the bearing bush body (1) outer end fixedly connected with a plurality of and regulation hole assorted stabilizer ring (12), stabilizer ring (12) outer end fixedly connected with control ring (13), and dwang (10) run through stabilizer ring (12) and extend to in control ring (13), control ring (13) inner is opened and is dug there is annular wave groove (15), annular wave groove (15) include a plurality of interval distribution's concave part and bellying, dwang (10) outer end fixedly connected with elastic telescopic rod (16), dwang (10) one end fixedly connected with and concave part assorted hemisphere fixture block (17) are kept away from in elastic telescopic rod (16).

2. A novel bi-arc self-adjusting tilting pad according to claim 1 and wherein: the equal fixedly connected with T type slider (14) in both ends about kickboard (8), all open on the pore wall of regulation hole both ends and chisel and have with T type slider (14) assorted spout, and sliding connection between T type slider (14) and the spout.

3. A novel bi-arc self-adjusting tilting pad according to claim 1 and wherein: the utility model discloses a lock nut, including control ring (13), screw hole and concave part, the screw hole has a plurality of evenly distributed's screw hole to control ring (13) outer end chisel, and the screw hole is linked together with concave part, screw hole female connection has locking screw (18), dwang (10) one end is kept away from in hemisphere fixture block (17) is chisel have with locking screw (18) assorted thread groove.

4. A novel bi-arc self-adjusting tilting pad according to claim 1 and wherein: dwang (10) outer end fixedly connected with rotating ring (11), the opening has the annular groove with rotating ring (11) assorted in stabilizing ring (12) inner.

5. A novel bi-arc self-adjusting tilting pad according to claim 1 and wherein: the tilting pads (2) are at least provided with 3 tilting pads, and the tilting pads (2) are distributed in an annular array around the central axis of the axial pad body (1).

6. A novel bi-arc self-adjusting tilting pad according to claim 1 and wherein: the inner end of the bearing bush body (1) is fixedly connected with a lining (19), and the section of the lining (19) is arc-shaped.