  Spin-1 Weyl point is formed by three bands touching at a single point in the
three dimensional (3D) momentum space, with two of which show cone-like
dispersion while the third band is flat. Such a triply degenerate point carries
higher topological charge $\pm2$2 and can be described by a three-band
Hamiltonian. We first propose a tight-binding model of a 3D Lieb lattice with
chiral interlayer coupling to form the Spin-1 Weyl point. Then we design a
chiral phononic crystal that carries these spin-1 Weyl points and special
straight-type acoustic Fermi arcs. We also computationally demonstrate the
robust propagation of the topologically protected surface states that can
travel around a corner or defect without reflection. Our results pave a new way
to manipulate acoustic waves in 3D structures and provide a platform for
exploring energy transport properties in 3D spin-1 Weyl systems.
