Plunger pump and fracturing device

The utility model discloses a plunger pump and a fracturing device, and relates to the field of oil and gas equipment. A plunger pump comprises a shell, a crankshaft and a plurality of bearings. The crankshaft comprises a plurality of supporting journals and a plurality of connecting journals, the supporting journals are arranged at intervals in the axial direction of the crankshaft, and every two adjacent supporting journals are connected through the corresponding connecting journal; the multiple bearings are all arranged on the shell, the multiple bearings are correspondingly arranged on the outer sides of the multiple supporting shaft necks in a sleeving mode, and in the axial direction of the crankshaft, the width size of the bearing located in the middle is larger than the width size of the bearings located at the two ends. The problem that the service life difference of bearings at all positions of the crankshaft is large can be solved. 本申请公开了一种柱塞泵及压裂装置，涉及油气装备领域。一种柱塞泵，包括：壳体、曲轴和多个轴承；所述曲轴包括多个支撑轴颈和多个连接轴颈，多