A bearing seat assembly for a roller assembly, comprising: a bearing seat; a bearing, arranged inside the bearing seat; a first seal, including at least two sealing lips; wherein, the first seal is installed on the bearing seat and arranged on a first axial outer side of the bearing, and wherein at least one sealing lip of the at least two sealing lips of the first seal is arranged around the inner or outer circumference of the first seal, wherein the bearing is a sealed bearing, wherein when the at least one sealing lip is arranged on the inner circumference of the first seal, a first sealing sleeve is configured to be arranged between the at least one sealing lip and the roller assembly, and wherein the first sealing sleeve radially extends as far as an inner diameter of an outer ring of the bearing, wherein bearing seat assembly further comprising a second seal, which includes at least two sealing lips and is installed on the bearing seat and arranged on a second axial outer side of the bearing; wherein, the first axial outer side is the side close to the roller assembly, and the second axial outer side is the side away from the roller assembly; and wherein at least one sealing lip of the at least two sealing lips of the second seal is configured to directly contact the roller assembly, or a second sealing sleeve is configured to be arranged between at least one sealing lip of the at least two sealing lips of the second seal and the roller assembly, wherein the bearing seat assembly further comprises a shield which is configured to be located between the first seal and the roller assembly in the axial direction, and wherein at least one part of the top of the bearing seat is formed in a curved shape, and a cooling channel is formed in the at least one part; and wherein the width of at least one part of the cooling channel is at least half of the width of the bearing. a bearing seat; a bearing, arranged inside the bearing seat; a first seal, including at least two sealing lips; wherein, the first seal is installed on the bearing seat and arranged on a first axial outer side of the bearing, and wherein at least one sealing lip of the at least two sealing lips of the first seal is arranged around the inner or outer circumference of the first seal, wherein the bearing is a sealed bearing, wherein when the at least one sealing lip is arranged on the inner circumference of the first seal, a first sealing sleeve is configured to be arranged between the at least one sealing lip and the roller assembly, and wherein the first sealing sleeve radially extends as far as an inner diameter of an outer ring of the bearing, wherein bearing seat assembly further comprising a second seal, which includes at least two sealing lips and is installed on the bearing seat and arranged on a second axial outer side of the bearing; wherein, the first axial outer side is the side close to the roller assembly, and the second axial outer side is the side away from the roller assembly; and wherein at least one sealing lip of the at least two sealing lips of the second seal is configured to directly contact the roller assembly, or a second sealing sleeve is configured to be arranged between at least one sealing lip of the at least two sealing lips of the second seal and the roller assembly, wherein the bearing seat assembly further comprises a shield which is configured to be located between the first seal and the roller assembly in the axial direction, and wherein at least one part of the top of the bearing seat is formed in a curved shape, and a cooling channel is formed in the at least one part; and wherein the width of at least one part of the cooling channel is at least half of the width of the bearing.