Importance

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Abstract

A swing barrel type positive displacement pump using a cross shaft joint bearing includes a main shaft (1) for connecting with a motor. The upper part of the main shaft (1) is slantwise provided with a rotating barrel (2) which swings along with the rotation of the main shaft (1). The periphery of the rotating barrel (2) is evenly provided with more than three pin shafts (3). Each pin shaft (3) is sleeved with a cross shaft joint bearing (4). Each cross shaft joint bearing (4) includes a bearing (41) sleeved on the pin shaft (3). The outer ring of each bearing (41) is fixedly connected with a swing sleeve (42). Fixed shafts (421, 421′) with the same axis extend along the left and right sides of the swing sleeve (42), respectively. The fixed shafts (421,421′) are sleeved with a left and right bearing (43, 43′), respectively. The outer rings of the left and right bearings are fixedly connected with left and right cross shaft swing sleeves (44, 44′), respectively. The top ends of the left and right cross shaft swing sleeves (44, 44′) are fixedly connected with each other. The bottom ends of the left and right cross shaft swing sleeves (44, 44′) are fixedly connected with a connecting bar (5) which is hinged with a piston in a displacement chamber. The positive displacement pump has low wear, low energy consumption, sensitive rotation, high rotation speed, and long service life.

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First Claim