초록 ▼

An improved hydraulic motor system, suitable for driving an automotive cooling fan or the like. The system is driven by grade gerotor set and an idle gerotor set which are stacked between a center plate and against a rear wall of a cylindrical cavity in a front face of a manifold. A fluid-tight cham

An improved hydraulic motor system, suitable for driving an automotive cooling fan or the like. The system is driven by grade gerotor set and an idle gerotor set which are stacked between a center plate and against a rear wall of a cylindrical cavity in a front face of a manifold. A fluid-tight chamber is established by securing an end frame can around the stacked gerotor sets and against the perimeter of the manifold cavity. Tightness of the seal is controlled by positioning a resilient cover plate against the end frame can from a position opposite the manifold, and adjustably clamping the resilient cover against the manifold until the resilient cover has undergone a predetermined amount of elastic deformation.

대표청구항 ▼

An improved hydraulic motor system, suitable for driving an automotive cooling fan or the like. The system is driven by grade gerotor set and an idle gerotor set which are stacked between a center plate and against a rear wall of a cylindrical cavity in a front face of a manifold. A fluid-tight cham

An improved hydraulic motor system, suitable for driving an automotive cooling fan or the like. The system is driven by grade gerotor set and an idle gerotor set which are stacked between a center plate and against a rear wall of a cylindrical cavity in a front face of a manifold. A fluid-tight chamber is established by securing an end frame can around the stacked gerotor sets and against the perimeter of the manifold cavity. Tightness of the seal is controlled by positioning a resilient cover plate against the end frame can from a position opposite the manifold, and adjustably clamping the resilient cover against the manifold until the resilient cover has undergone a predetermined amount of elastic deformation. n of the high pressure buffer gas entering the second bearing chamber; releasing the oil in the first bearing chamber and the portion of the low pressure buffer gas from the first bearing chamber to maintain the low bearing chamber pressure wherein the oil in the first bearing chamber and the portion of the low pressure buffer gas are returned to a first reservoir for separation of the buffer gas from the oil; and releasing the oil in the second bearing chamber and the portion of the high pressure buffer gas from the second bearing chamber to maintain the high bearing chamber separate pressure, wherein the oil in the second bearing chamber and the portion of the high pressure buffer gas are returned to a second reservoir for separation of the buffer gas from the oil at the high bearing chamber pressure, and further returning oil to the first reservoir at the low bearing chamber pressure. 2. The method of claim 1, wherein providing a low bearing chamber pressure to a first bearing chamber comprises providing a low pressure buffer gas at a first predetermined flow rate to the seals adjacent the first bearing chamber, a first portion of the low pressure buffer gas entering the first bearing chamber and connecting the first bearing chamber to a first enclosed and pressurized oil reservoir at the low bearing chamber pressure; and wherein providing a high bearing chamber pressure to a second bearing chamber comprises providing a high pressure buffer gas at a second predetermined flow rate to the seals adjacent the second bearing chamber, a first portion of the high pressure buffer gas entering the second bearing chamber and connecting the second bearing chamber to a second enclosed and pressurized oil reservoir at the high bearing chamber pressure. 3. The method of claim 1, further comprising: introducing oil into the working chamber so that the first end of the seals are exposed to the introduced oil. 4. The method of claim 1, wherein the seals for sealing the first and second bearing chambers from the working chamber comprises labyrinth seals, the labyrinth seals having labyrinth ribs positioned around each rotor shaft of the bore. 5. The method of claim 1, further comprising: controlling the low chamber pressure in the first reservoir by controlling the release of buffer gas from the first reservoir; and controlling the high bearing chamber pressure in the second reservoir by controlling the release of buffer gas from the second reservoir. 6. The method of claim 5, further comprising: maintaining a constant level of oil in the second reservoir; and recirculating the oil returned to the first reservoir. 7. A method for lubricating and sealing the bearings and gears associated with a plurality of rotors of a screw compressor and isolating a process fluid to be compressed from a lubricant for the bearings and gears, the compressor having a process fluid and the rotors in a working chamber, the rotors having shafts supported by the bearings, the bearings contained in a plurality of bearing chambers, the shafts passing from the working chamber to the bearings in the bearing chambers, the working chamber having a low pressure inlet end and a high pressure outlet end for the compressible fluid, comprising: providing a first bearing chamber adjacent the low pressure inlet end of the working chamber; providing a second bearing chamber adjacent the high pressure outlet end of the working chamber; pumping oil to the bearings in the plurality of bearing chambers under pressure; sealing the first and second bearing chambers from the working chamber by seals having a bore around each rotor shaft, the seals comprising a body having a first end adjacent the working chamber and a second end adjacent a bearing chamber and an inner groove in the bore intermediate to the ends, the inner groove of each seal connected to a source of buffer gas; providing a low pressure buffer gas at a first predetermined flow rate to the seals ad