阅读说明：本技术 一种浮动式推力轴承 (Floating thrust bearing ) 是由 吕红卫 张晓红 贺达 于 2020-04-29 设计创作，主要内容包括：本发明公开了一种浮动式推力轴承,包括推力轴承本体,所述推力轴承本体的两侧面上均沿径向设有进油通道,所述进油通道的一端与所述推力轴承本体的内孔相连,另一端设有排污槽,所述排污槽与所述推力轴承本体的外周边相连,所述推力轴承本体的内孔侧壁上沿周向设有多个油楔,所述油楔连通所述推力轴承本体的两侧面,所述油楔的深度沿所述内孔的周向逐渐变深,且所有油楔的深度变化方向相同。本发明在推力轴承本体的内孔增加深度为梯度设置的油楔,使得推力轴承本体的内孔各处受力均匀,与转子轴间的耐磨损效果好。(The invention discloses a floating thrust bearing, which comprises a thrust bearing body, wherein oil inlet channels are arranged on two side surfaces of the thrust bearing body along the radial direction, one end of each oil inlet channel is connected with an inner hole of the thrust bearing body, the other end of each oil inlet channel is provided with a sewage discharge groove, the sewage discharge groove is connected with the outer periphery of the thrust bearing body, a plurality of oil wedges are arranged on the side wall of the inner hole of the thrust bearing body along the circumferential direction, the oil wedges are communicated with the two side surfaces of the thrust bearing body, the depths of the oil wedges are gradually increased along the circumferential direction of the inner hole, and the depth change directions of all the oil wedges are the same. According to the invention, the oil wedge with the gradient depth is added in the inner hole of the thrust bearing body, so that the inner hole of the thrust bearing body is uniformly stressed, and the wear-resistant effect between the inner hole of the thrust bearing body and the rotor shaft is good.)

1. A floating thrust bearing, characterized by: including thrust bearing body (1), all radially be equipped with oil feed passageway (2) on the both sides face of thrust bearing body (1), the one end of oil feed passageway (2) with hole (4) of thrust bearing body (1) link to each other, and the other end is equipped with blowdown groove (7), blowdown groove (7) with the outlying of thrust bearing body (1) links to each other, be equipped with a plurality of oil wedges (3) along circumference on hole (4) lateral wall of thrust bearing body (1), oil wedge (3) intercommunication the both sides face of thrust bearing body (1), the degree of depth of oil wedge (3) is followed the circumference of hole (4) becomes dark gradually, and the degree of depth change direction of all oil wedges (3) is the same.

2. A floating thrust bearing as claimed in claim 1, wherein: oil feed passageway (2) with the one end that hole (4) of thrust bearing body (1) link to each other is equipped with leads to oil groove (5), lead to oil groove (5) and run through thrust bearing body (1), the quantity of the oil feed passageway (2) of thrust bearing body (1) both sides is the same, lead to oil groove (5) intercommunication the oil feed passageway (2) that thrust bearing body (1) both sides correspond.

3. A floating thrust bearing as claimed in claim 2, wherein: the oil inlet channel (2) of thrust bearing body (1) both sides arrange the position the same, lead to oil groove (5) and be on a parallel with the axial of thrust bearing body (1), the quantity of oil wedge (3) with the oil inlet channel (2) quantity of thrust bearing body (1) one side is the same, and each oil wedge (3) all links to each other with adjacent two oil grooves (5) of leading to.

4. A floating thrust bearing as claimed in claim 3, wherein: the thrust bearing is characterized in that eight oil inlet channels (2) are arranged on two side faces of the thrust bearing body (1), and eight oil wedges (3) are uniformly arranged around an inner hole (4) of the thrust bearing body (1).

5. A floating thrust bearing as claimed in claim 3, wherein: the cross-section of oil wedge (3) and logical oil groove (5) is the arc, the degree of depth of oil wedge (3) is followed rather than adjacent one and is led to oil groove (5) to another direction of leading to oil groove (5) and become dark gradually.

6. A floating thrust bearing as claimed in claim 1, wherein: the installation direction of the thrust bearing body (1) is determined by the rotation direction of the rotor shaft (6), and the rotation direction of the rotor shaft (6) relative to the thrust bearing body (1) is the direction in which the depth of the oil wedge (3) becomes gradually shallow.

7. A floating thrust bearing as claimed in claim 1, wherein: the depth of the oil wedge (3) is 0.1-0.2 mm.

8. A floating thrust bearing as claimed in claim 1, wherein: the thickness of the thrust bearing body (1) is 8-12mm, and the gap between the thrust bearing body (1) and the rotor shaft (6) is 0.2-0.5 mm.

Technical Field

The invention relates to the technical field of bearings, in particular to a floating thrust bearing.

Background

The thrust bearing is a bearing mode generally adopted in the field of rotating machinery, is mainly used for axial stopping of rotor operation, reduces mechanical friction loss, improves mechanical efficiency of the rotor, and ensures high-speed rotation. As shown in fig. 1, for the application aspect of the conventional thrust bearing, it is difficult to maintain the rotor shaft at the exact center position of the thrust bearing when the rotor shaft rotates due to the gravity of the floating thrust bearing itself. When the rotor is particularly started under variable working conditions, the cylindrical surface of an inner hole of the thrust bearing is easy to contact with the rotor shaft, so that the thrust bearing damages the main rotor shaft, scrap iron damages the bearing, even the main shaft is broken, and the service life and reliability of the thrust bearing are also reduced.

Disclosure of Invention

Aiming at the problems, the invention researches and designs a floating thrust bearing to solve the defect that the inner hole cylindrical surface of the thrust bearing is easy to directly contact with a rotor shaft to cause strain on the rotor shaft and the thrust bearing.

The technical means adopted by the invention are as follows:

the utility model provides a floating thrust bearing, includes the thrust bearing body, all along radially being equipped with the oil feed passageway on the both sides face of thrust bearing body, the one end of oil feed passageway with the hole of thrust bearing body links to each other, and the other end is equipped with the blowdown groove, the blowdown groove with the periphery of thrust bearing body links to each other, be equipped with a plurality of oil wedges along circumference on the hole lateral wall of thrust bearing body, the oil wedge intercommunication the both sides face of thrust bearing body, the degree of depth of oil wedge is followed the circumference of hole is deepened gradually, and the degree of depth change direction of all oil wedges is the same.

Preferably, the oil inlet passageway with the one end that the hole of thrust bearing body links to each other is equipped with leads to the oil groove, it runs through to lead to the oil groove the thrust bearing body, the quantity of the oil inlet passageway of thrust bearing body both sides is the same, lead to the oil groove intercommunication the oil inlet passageway that thrust bearing body both sides correspond.

Preferably, the oil inlet channels on the two sides of the thrust bearing body are arranged at the same position, the oil passing grooves are parallel to the axial direction of the thrust bearing body, the number of the oil wedges is the same as that of the oil inlet channels on one side of the thrust bearing body, and each oil wedge is connected with two adjacent oil passing grooves.

Preferably, all be equipped with eight oil feed passageways on the both sides face of thrust bearing body, the hole of thrust bearing body evenly is equipped with eight oil wedges all around.

Preferably, the oil wedge and the oil through groove are both arc-shaped in cross section, and the depth of the oil wedge gradually becomes deeper along the direction from one oil through groove adjacent to the oil wedge to the other oil through groove.

Preferably, the installation direction of the thrust bearing body is determined by a rotation direction of the rotor shaft, and the rotation direction of the rotor shaft relative to the thrust bearing body is a direction in which the depth of the oil wedge becomes gradually shallower.

Preferably, the oil wedge has a depth of 0.1-0.2 mm.

Preferably, the thickness of the thrust bearing body is 8-12mm, and the clearance between the thrust bearing body and the rotor shaft is 0.2-0.5 mm.

Compared with the prior art, the floating thrust bearing has the advantages that: the oil wedges with the same number as the oil inlet channels of the thrust surface on one side are added in the inner hole of the thrust bearing body, the depth of the oil wedges gradually becomes deeper along the circumferential direction of the inner hole of the thrust bearing body, so that lubricating oil is uniformly distributed in a gap between the thrust bearing body and the rotor shaft, the inner hole of the thrust bearing body is uniformly stressed, and the wear-resistant effect between the inner hole of the thrust bearing body and the rotor shaft is good; lead to the oil groove and run through the thrust bearing body, play the effect of pump, can provide lubricating oil for keeping away from the thrust face (moving the thrust face) of advancing oil side, lead to the oil groove and establish to the arc, can make things convenient for the distribution of lubricating oil with the cooperation of arc oil wedge.

Drawings

FIG. 1 is a schematic view of a conventional thrust bearing body and rotor shaft.

FIG. 2 is a schematic structural diagram of a thrust bearing body and a rotor shaft according to an embodiment of the present invention.

Fig. 3 is an enlarged schematic view of a portion a of fig. 2.

In the figure, 1, a thrust bearing body; 2. an oil inlet channel; 3. an oil wedge; 4. an inner bore; 5. an oil groove is communicated; 6. a rotor shaft; 7. a sewage draining groove.

Detailed Description

As shown in fig. 2-3, a floating thrust bearing includes a thrust bearing body 1. The thrust surfaces on the two sides of the thrust bearing body 1 are respectively a static thrust surface and a dynamic thrust surface, the static thrust surface is contacted with the static surface, and the dynamic thrust surface is contacted with the rotating surface. The corresponding positions on the static thrust surface and the dynamic thrust surface are provided with oil inlet channels 2 with the same quantity, the oil inlet channels 2 are arranged along the radial direction of the thrust bearing body 1, one end of each oil inlet channel is connected with an inner hole 4 of the thrust bearing body 1, and the other end of each oil inlet channel is provided with a sewage discharge groove 7. The blowdown groove 7 is connected with the outer periphery of the thrust bearing body 1, the width of the blowdown groove 7 is smaller than that of the oil inlet channel 2, and small particles in lubricating oil can be discharged through the blowdown groove 7. The side wall of the inner hole 4 is circumferentially provided with a plurality of oil wedges 3, the number of the oil wedges 3 is the same as that of the oil channels 2 on the static thrust surface, and the oil wedges 3 are communicated with the static thrust surface and the dynamic thrust surface. Each oil wedge 3 is arranged between two adjacent oil inlet channels 2, and the oil wedge 3 is arc-shaped and gradually deepens along the direction from the first oil inlet channel 2 to the second oil inlet channel 2. All the oil wedges 3 are sequentially and circularly arranged, and when the inner hole 4 rotates along the same direction, the depth change of all the oil wedges 3 along the rotating direction is the same. After lubricating oil gets into the hole 4 of thrust bearing body 1 by oil feed passageway 2, can evenly fill up the space between thrust bearing body 1 and the rotor shaft 6 along the oil wedge 3 that has the depth gradient, the evenly distributed of the lubricating oil of being convenient for thrust bearing body 1 atress everywhere is even, and is stand wear and tear effectual.

And an oil through groove 5 is arranged at one end of the oil inlet channel 2 connected with the inner hole 4, the oil through groove 5 penetrates through the thrust bearing body 1 and is communicated with the corresponding oil inlet channel 2 on the static thrust surface and the dynamic thrust surface. This oil groove 5 can be set to semi-circular, and its arc side is laminated in oil feed passageway 2, leads to oil groove 5 and plays the effect of pump, provides lubricating oil for the thrust surface (moving thrust surface) of keeping away from the oil feed side. Lead to the oil groove 5 and be on a parallel with thrust bearing body 1's axial, each oil wedge 3 all links to each other with two adjacent logical oil grooves 5, can form even annular oil film along hole 4 circumference like this, can guarantee the steady operation of rotor shaft 6.

In this embodiment, all be equipped with eight oil feed passageways 2 on the both sides face of thrust bearing body 1, eight oil feed passageways 2 evenly distributed are on two sides of thrust bearing body 1, and all oil feed passageways 2 become central symmetry with the central point of thrust bearing body 1. Eight oil wedges 3 are uniformly arranged around an inner hole 4 of the thrust bearing body 1, and two ends of each oil wedge 3 are connected with adjacent oil through grooves 5. The 4 cylinders of hole of thrust bearing body 1 can form the repeated constitutional unit of round "logical oil groove + oil wedge" all around, and this repeated constitutional unit forms the one deck oil film after filling lubricating oil, and the bearing capacity that the oil film produced can support the weight of thrust bearing body 1, prevents thrust bearing body 1 and rotor shaft 6 contact and damage.

The deepest depth of the oil wedge 3 can be 0.1-0.2mm, the thickness of the thrust bearing body 1 is 8-12mm, the gap between the thrust bearing body 1 and the rotor shaft 6 is 0.2-0.5mm, and the formed oil film has good bearing capacity and stability.

The mounting direction of the thrust bearing body 1 is determined by the rotation direction of the rotor shaft 6, and the rotation direction of the rotor shaft 6 with respect to the thrust bearing body 1 is a direction in which the depth of the oil wedge 3 becomes gradually shallower. When the rotor shaft 6 rotates relative to the thrust bearing body 1, the lubricating oil entering from the oil inlet channel 2 moves from the deeper end to the shallower end of the oil wedge 3, and gradually fills the gap between the thrust bearing body 1 and the rotor shaft 6. The arrangement ensures that the lubricating oil is filled more uniformly, the thrust bearing body 1 is always in a uniform stress state from the first time of stress, and the abrasion is reduced.

The working principle of the invention is as follows: the rotor shaft 6 and the floating thrust bearing body 1 have relative speed when rotating (the rotating speed of the thrust bearing body is 40% -60% of the rotating speed of the rotor shaft 6), the oil wedges 3 with the same number as the oil inlet channels 2 on each thrust surface are arranged in the inner hole 4 of the thrust bearing, the oil wedges 3 in the inner hole 4 form an oil film to offset the gravity of the thrust bearing at the relative rotating speed, and the problem that the thrust bearing and the shaft are in contact friction due to the bearing force influence of the thrust bearing is avoided, so that the loss of the thrust bearing is increased.

The gravity calculation process of the thrust bearing main body comprises the following steps:

G＝ρ·v＝ρ·π(r₁ ²-r₂ ²)·h；

wherein rho-thrust bearing material density, kg/m³；

r₁-thrust bearing outer ring radius, m;

r₂-thrust bearing outer ring radius, m;

h-thrust bearing width, m;

after the thrust bearing prepared by the invention works for 2 hours, the abrasion traces of the bearing sleeve are found as follows: less than 0.01mm, and the condition that the bearing sleeve is worn by 1-3mm can occur in the case of the individual floating thrust bearing after the bearing sleeve runs for 3-5 ten thousand kilometers. Experiments prove that the thrust bearing main body of the floating thrust bearing is not easy to directly contact with the rotor shaft, and the thrust bearing has good abrasion resistance effect and is suitable for being applied to the actual production process.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.