Slip sheet expander

Abstract

The invention discloses a slip sheet expander. The slip sheet expander comprises a stator comprising an air cylinder and a rotor which is eccentrically mounted inside the air cylinder of the stator, wherein an exhaust end cover is arranged on one side of the stator, and an output shaft end cover is mounted on the other side of the stator; a bearing positioning groove is formed in the inner side of the exhaust end cover; a bearing sleeve is mounted inside the bearing positioning groove; one end of a rotor shaft movably sleeves the bearing sleeve, and the other end of the rotor shaft extends out of the output shaft end cover so as to output power; slip sheets sliding in the radial direction are mounted inside rotor grooves; a fluid through hole is formed in the bearing positioning groove of the exhaust end cover; a fluid passage is formed in a rotor shaft end face positioned inside the bearing positioning groove in the axial direction; one or more branch passages are formed in the bottom of each rotor groove in the radial direction; the branch passages are communicated with the fluid passage. The slip sheet expander has the advantages that the slip sheets are controlled by a high pressure fluid under the condition that the rotor is free of initial speed and can automatically stretch out of the rotor grooves at the right moment, so that normal startup of the slip sheet expander is realized, the slip sheet expander is reliable to use, and miniaturization is realized.

Description

technical field [0001] The invention belongs to a mechanical device for realizing energy conversion by using a fluid medium, in particular to a sliding vane expander. Background technique [0002] An expander is a device that converts the pressure energy contained in high-pressure gas, liquid or gas-liquid mixture into mechanical energy. [0003] The structure of the sliding vane expander is as follows figure 1 As shown, it has a stator 1 including a cylinder, a rotor 2 is installed in the stator cylinder, the axis of the rotor 2 deviates from the axis of the stator cylinder, and a plurality of axial rotor slots 3 are opened on the outer circumference of the rotor 2, and the rotor slot 3 A slide plate 4 that slides radially is placed inside. Due to the eccentric configuration of the rotor in the cylinder, the space volume formed by the inner wall of the cylinder and the outer surface of the rotor is asymmetrical, and the space volume of one arc section is narrow while that...

AI Technical Summary

Problems solved by technology

[0005] 1. Since the rotor speed of the sliding vane expander is 1500-3000r / min, the stretching frequency of the spring is also 1500-3000 times / min. Usually, the service life of the spring cannot withstand such high-speed motion damage, and the spring is very easy to fail or break , the spring needs to be replaced frequently

[0006] 2. The spring at the bottom of the sliding plate will generate high temperature due to high-frequency, rapid and long-term friction, and the elastic modulus of all springs will change, resulting in uneven height at both ends of the sliding plate, thereby damaging the sliding plate, chute, and even straining Cylinder

[0007] 3. When the rotor is moving at high speed, due to the action of centrifugal force, there is already friction between the slide plate and the cylinder body and the useful work is lost. After the spring plate or spring is installed, the friction power consumption of the slide plate will further increase due to the pre-tightening force of the spring. Reduced the mechanical power output of the sliding vane expander

[0011] 1. On the one hand, because the slider is close to the air inlet, the slider is pressed back into the rotor slot, and the gap at the bottom of the rotor slot is very small, no more than 3mm; on the other hand, because the rotor rotates at a high speed, the speed is generally 1500-3000r / min. It rotates 25-50 times per second, the time for the gap at the bottom of the rotor slot to pass through the groove on the end face is extremely short, and the high-pressure gas cannot pass into the gap at the bottom of the rotor slot, and this structure cannot use high-pressure gas to lift up the sliding vane. Therefore, the technology recorded in this patent document The proposal cannot solve the technical problems raised in the specification;

[0012] 2. Since the end face groove engraved on the inner wall of the left end cover is only a small arc segment, if the high-pressure gas is introduced when the rotor is not moving, the bottom of most slides that do not stay in the end face groove will not have the force of high-pressure gas, and the slides cannot be moved from the bottom of the end face groove. The rotor slot slides out, so it cannot achieve the start of the vane expander without the initial rotation down

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