US 12,435,757 B1
Wind power main-shaft sliding bearing with bidirectional stresses and wind power generation system
Jianhua Xu, Wuxi (CN); and Zhen Hu, Wuxi (CN)
Assigned to JIANGSU ZHENJIANG NEW ENERGY EQUIPMENT CO., LTD., Wuxi (CN)
Filed by Jiangsu Zhenjiang New Energy Equipment Co., Ltd., Jiangyin (CN)
Filed on Jun. 17, 2025, as Appl. No. 19/239,986.
Application 19/239,986 is a continuation of application No. PCT/CN2024/128027, filed on Oct. 29, 2024.
Claims priority of application No. 202411025902.0 (CN), filed on Jul. 30, 2024.
Int. Cl. F16C 17/10 (2006.01); F16C 33/10 (2006.01)
CPC F16C 17/10 (2013.01) [F16C 33/103 (2013.01); F16C 2360/31 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A wind power main-shaft sliding bearing with bidirectional stresses, comprising an outer ring, an inner ring and tile blocks, wherein:
where the inner ring slides on the outer ring, the outer ring has a cross-section with an isosceles trapezoidal shape,
the inner ring has a groove therein with a trapezoidal cross-section, matching the isosceles trapezoidal shape of the outer ring at the interface of the outer ting and the inner ring,
the trapezoidal groove has sloping faces with symmetrical chutes therein,
each of the chutes contains one of the tile blocks,
each of the tile blocks has a spherical face facing the inner ring,
each of the tile blocks has a working face facing the outer ring,
each of the tile blocks separates a first oil cavity and a second oil cavity, the first oil cavity is between the outer ring and the tile blocks, the second oil cavity is between the inner ring and the tile blocks, the first oil cavity includes a lubricant, and the second oil cavity includes an oil,
the inner ring includes a first oil supply passage and a second oil supply passage, the first oil supply passage is in communication with the first oil cavity, and the second oil supply passage is in communication with the second oil cavity, and
each of the tile blocks includes a first oil supply passage comprising a first flow channel in the inner ring, a second flow channel in the corresponding tile block, and a communicating component, the second flow channel is in a radial direction of the spherical face, the second flow channel has one end in communication with the communicating component on the spherical face and another end that passes through the working face of the tile block and is in communication with the first oil cavity, the communicating component is in the second oil cavity and is in communication with the first flow channel, and the communicating component is flexible.
 
5. A wind power main-shaft sliding bearing with bidirectional stresses, comprising an outer ring, an inner ring, tile blocks and a guide seat, wherein:
where the inner ring slides on the outer ring, the outer ring has a cross-section with an isosceles trapezoidal shape,
the inner ring has a groove therein with a trapezoidal cross-section, matching the isosceles trapezoidal shape of the outer ring at the interface of the outer ting and the inner ring,
the trapezoidal groove has sloping faces with symmetrical chutes therein,
each of the chutes contains one of the tile blocks,
each of the tile blocks has a spherical face facing the inner ring,
each of the tile blocks has a working face facing the outer ring,
each of the tile blocks separates a first oil cavity and a second oil cavity, the first oil cavity is between the outer ring and the tile blocks, the first oil cavity includes a lubricant, and the second oil cavity includes an oil,
the inner ring includes a first oil supply passage and a second oil supply passage, the first oil supply passage is in communication with the first oil cavity, and the second oil supply passage is in communication with the second oil cavity, and
each of the tile blocks includes a first oil supply passage comprising a first flow channel in the inner ring,
the guide seat is constructed or adapted to the chute;
the guide seat and the chute form a moving pair in a depth direction of the chute;
the second oil cavity is between a lower end of the guide seat and the chute;
the guide seat has an inner concave face that is spherical and adapted to the spherical face of the tile block;
the tile block is mounted on the inner concave face of the guide seat;
the spherical face of the tile block and the inner concave face of the guide seat form a spherical face pair;
the first oil supply passage comprises a first flow channel in the inner ring, a vertical flow channel in an inside wall of the chute, a transverse flow channel in the guide seat, a circular groove in the inner concave face, and at least four second flow channels in the tile block;
the vertical flow channel is in a depth direction of the chute;
the first flow channel is in communication with the vertical flow channel;
the transverse flow channel has one end in a side wall of the guide seat that forms an inlet in the side wall of the guide seat;
the inlet corresponds to the vertical flow channel and is in communication with the vertical flow channel;
the circular groove is at a center of the inner concave face;
the transverse flow channel has another end in communication with the circular groove;
ends of each of the second flow channels open through the working face and the spherical face of the tile block, respectively;
each of the second flow channels is in communication with the circular groove;
one of the second flow channels is at a center of the tile block, the remaining second flow channels are uniformly distributed in a circumferential direction around the one second flow channel, and spacings between the second flow channels gradually increase along a direction from the guide seat to the first oil cavity;
the vertical flow channel has an upper end opening through an outer annular face of the inner ring; and
the guide seat includes a limiting protrusion at a side thereof, adapted to the vertical flow channel and movably constrained in the vertical flow channel.
 
9. A wind power main-shaft sliding bearing with bidirectional stresses, comprising an outer ring, an inner ring, tile blocks and a guide seat, wherein:
where the inner ring slides on the outer ring, the outer ring has a cross-section with an isosceles trapezoidal shape,
the inner ring has a groove therein with a trapezoidal cross-section, matching the isosceles trapezoidal shape of the outer ring at the interface of the outer ting and the inner ring,
the trapezoidal groove has sloping faces with symmetrical chutes therein,
each of the chutes contains one of the tile blocks,
each of the tile blocks has a spherical face facing the inner ring,
each of the tile blocks has a working face facing the outer ring,
each of the tile blocks separates a first oil cavity and a second oil cavity, the first oil cavity is between the outer ring and the tile blocks, the first oil cavity includes a lubricant, and the second oil cavity includes an oil,
the inner ring includes a first oil supply passage and a second oil supply passage, the first oil supply passage is in communication with the first oil cavity, and the second oil supply passage is in communication with the second oil cavity, and
each of the tile blocks includes a first oil supply passage comprising a first flow channel in the inner ring,
the guide seat is constructed or adapted to the chute;
the guide seat and the chute form a moving pair in a depth direction of the chute;
the second oil cavity is between a lower end of the guide seat and the chute;
the guide seat has an inner concave face that is spherical and adapted to the spherical face of the tile block;
the tile block is mounted on the inner concave face of the guide seat;
the spherical face of the tile block and the inner concave face of the guide seat form a spherical face pair;
the first oil supply passage comprises a first flow channel in the inner ring, a vertical flow channel in an inside wall of the chute, a transverse flow channel in the guide seat, a circular groove in the inner concave face, and a second flow channel in the tile block;
the vertical flow channel is in a depth direction of the chute;
the first flow channel is in communication with the vertical flow channel;
the transverse flow channel has one end in a side wall of the guide seat that forms an inlet in the side wall of the guide seat;
the inlet corresponds to the vertical flow channel and is in communication with the vertical flow channel;
the circular groove is at a center of the inner concave face;
the transverse flow channel has another end in communication with the circular groove;
ends of the second flow channel open through the working face and the spherical face of the tile block, respectively;
the second flow channel is in communication with the circular groove;
the chute contains an elastic member;
the guide seat has a spherical lower end or face;
the wind power main-shaft sliding bearing further comprises a follower member at a bottom of the guide seat;
the follower member comprises a first circular body adapted to and inside the chute, a second circular body adapted to the spherical face of the tile block, and a support circle;
the first circular body and the second circular body are connected to the support circle;
the first circular body, the second circular body, and the support circle jointly enclose an annular receiving cavity;
the first circular body comprises a first sealing face fitting an inner surface of the chute and a beveled or arc face away from the first sealing face;
the second circular body comprises a second sealing face fitting the spherical face of the guide seat; and
the elastic member has an upper end in a receiving cavity of the follower member, contacting (i) the support circle or (ii) the first circular body and the second circular body, and a lower end contacting a bottom of the chute.