摘要:
A swash plate compressor is disclosed which is provided with a compression capacity control apparatus capable of returning an output pressure of a high pressure chamber of one cover to a low pressure chamber of the same cover. The control apparatus comprises a delivery chamber which is communicated with a high pressure chamber of the other cover, isolated from the high pressure chamber of the one cover and connected to a delivery conduit. The control apparatus also comprises a compression capacity control passageway providing communication between the delivery chamber and the low pressure and high pressure chambers of the one cover. A rotary three-way valve member is disposed in the control passageway to interrupt the communication between the delivery chamber and the high pressure chamber of the one cover while establishing communication between the low pressure and high pressure chambers of the one cover. A relief valve is provided to communicate to the delivery chamber an elevated pressure in the compression chamber of the one cover while the rotary valve member shifts from one position to another.
摘要:
A vane compressor has a suction connector and a discharge connector arranged at a rear portion thereof. A rear suction chamber is formed at a rear side of the rear side block and communicates with pump working chambers. A passage means directly communicates the above rear suction chamber with an annular front suction chamber formed in the front head in a manner surrounding a sealing chamber accommodating a shaft-seal means.
摘要:
A cylinder has at least one valve seating surface-forming portion which has an outer surface formed therein with at least one recess, the bottom surface of which serves as a valve seating surface. A discharge valve is arranged on the valve seating surface-forming portion to close or open outlet holes each formed in corresponding ones of the valve seating surface. The discharge valve has at least one valve body formed of an elastic plate member disposed in close contact with a corresponding one of the valve seating surface. Preferably, the valve seating surface is arcuately concavely curved and the corresponding valve body has a correspondingly curved surface. The outlet holes are each formed in a thinnest portion of the valve seating surface-forming portion.
摘要:
A vane compressor has a vane back pressure adjustment device including back-pressure chambers defined in a vane-supporting rotor and surrounded by vanes and side blocks secured to axial ends of a cylinder. The back-pressure chamber has axial ends disposed to follow a path against each of the side blocks when the rotor rotates. The path is divided into at least one high-pressure zone in which the vanes move across a pump outlet defined in the cylinder, and at least one normal-pressure zone which is the remainder of the path. In the normal-pressure zone, oil grooves defined in surfaces of the side blocks which face the rotor and supplied with oil from an oil sump in the vane compressor are in communication with the back-pressure chambers, to thereby maintain the oil pressure in the back-pressure chambers at a pressure level in the oil sump. In the high-pressure zone, the back-pressure chambers are out of communication with the oil grooves so that the oil fed into the back-pressure chambers is confined therein, except through a restrictor means. When the vanes move across the pump outlet, the vanes enter the high-pressure zone to trap oil in the back-pressure chambers to thereby elevate the oil pressure in the back-pressure chambers to a high level. Therefore, the vanes are prevented from being retracted deeply into vane slits in the rotor and then popping out into hitting engagement with the cylinder.
摘要:
A vane compressor has a vane back pressure adjustment device including back-pressure chambers defined in a vane-supporting rotor and surrounded by vanes and side blocks secured to axial ends of a cylinder. The back-pressure chamber has axial ends disposed to follow a path against each of the side blocks when the rotor rotates. The path is divided into at least one high-pressure zone in which the vanes move across a pump outlet defined in the cylinder, and at least one normal-pressure zone which is the remainder of the path. In the normal-pressure zone, oil grooves defined in surfaces of the side blocks which face the rotor and supplied with oil from an oil sump in the vane compressor are in communication with the back-pressure chambers, to thereby maintain the oil pressure in the back-pressure chambers at a pressure level in the oil sump. In the high-pressure zone, the back-pressure chambers are out of communication with the oil grooves so that the oil fed into the back-pressure chambers is confined therein, except through a restrictor means. When the vanes move across the pump outlet, the vanes enter the high-pressure zone to trap oil in the back-pressure chambers to thereby elevate the oil pressure in the back-pressure chambers to a high level. Therefore, the vanes are prevented from being retracted deeply into vane slits in the rotor and then popping out into hitting engagement with the cylinder.
摘要:
A swash plate compressor is disclosed which is provided with a compression capacity control apparatus capable of returning an output pressure of a high pressure chamber of one cover to a low pressure chamber of the same cover. The control apparatus comprises a delivery chamber which is communicated with a high pressure chamber of the other cover, isolated from the high pressure chamber of said one cover and connected to a delivery conduit. The control apparatus also comprises a compression capacity control passageway providing communication between the delivery chamber and the low pressure and high pressure chambers of said one cover. A valve member is disposed in the control passageway to interrupt the communication between the delivery chamber and the high pressure chamber of said one cover while establishing communication between the low pressure and high pressure chambers of said one cover.
摘要:
A rotor is operatively provided in a bore of a cylinder which is formed with an inlet and an outlet. The cylinder is enclosed by a housing with an annular chamber being defined between the cylinder and the housing. The housing has an inlet which is connected to the inlet of the cylinder. The outlet of the cylinder is provided at an upper portion thereof. An oil sump is defined by a lower portion of the annular chamber of the housing. A partition divides the interior of the housing into the annular chamber within which the cylinder is disposed and an outlet chamber which communicates with an outlet of the housing. The lower portion of the partition is cut away to communicate the annular chamber with the outlet chamber. An oil passageway leads from the oil sump through the rotor to the inlet of the housing in such a manner that oil flows through the oil passageway to lubricate the internal parts of the rotor and is entrained in operating fluid at the inlet of the housing, passing through the cylinder to lubricate areas of sliding contact between the rotor and the inner periphery of the cylinder. The operating fluid and oil expand and change direction in the annular chamber so that the operating fluid passes to the outlet chamber but the entrained oil is precipitated and returns to the oil sump.
摘要:
A vane compressor has a vane back pressure adjustment device including back-pressure chambers defined in a vane-supporting rotor and surrounded by vanes and side blocks secured to axial ends of a cylinder. The back-pressure chamber has axial ends disposed to follow a path against each of the side blocks when the rotor rotates. The path is divided into at least one high-pressure zone in which the vanes move across a pump outlet defined in the cylinder, and at least one normal-pressure zone which is the remainder of the path. In the normal-pressure zone, oil grooves defined in surfaces of the side blocks which face the rotor and supplied with oil from an oil sump in the vane compressor are in communication with the back-pressure chambers, to thereby maintain the oil pressure in the back-pressure chambers at a pressure level in the oil sump. In the high-pressure zone, the back-pressure chambers are out of communication with the oil grooves so that the oil fed into the back-pressure chambers is confined therein, except through a restrictor means. When the vanes move across the pump outlet, the vanes enter the high-pressure zone to trap oil in the back-pressure chambers to thereby elevate the oil pressure in the back-pressure chambers to a high level. Therefore, the vanes are prevented from being retracted deeply into vane slits in the rotor and then popping out into hitting engagement with the cylinder.
摘要:
In an electric motor, its motor frame has a shaft hole, a shaft is fitted in the shaft hole in such a manner that its one end potion is in the shaft hole while the other end portion is extended outside the motor frame. The motor frame includes a bearing-receiving portion extended therefrom in such a manner that the bearing-receiving portion confronts with the inner race of a rolling bearing fitted on the end portion of the shaft, and has a wall surface which merges with the wall surface of the shaft hole. The shaft has a groove which is covered by a part of the inner cylindrical surface of the inner race of the ball bearing and by the wall surface of the protruded portion. The inner raced is fixedly secured to the shaft with adhesive.
摘要:
A rotary polygon mirror type light deflecting system including a mirror, a hub, and a fixed shaft made of materials whose coefficients of linear expansion are equal to one another. A fixed shaft is erected integrally with a frame. Inner races of ball bearings are secured to the fixed shaft. A stator has a coil wound around a stator core formed contiguously with the frame. A drive magnet annularly surrounding the outer circumferential surface of the stator core and a yoke are fixed to a polygon mirror with a clamper and screws through a hub. The drive magnet, the yoke, and the hub are secured to the fixed shaft and made rotatable by the outer races of the ball bearings secured to the fixed shaft.