Multistage pneumatic motor

Abstract

A multistage pneumatic motor includes a shell (1) and a power output main shaft (2). The shell (1) is provided with a gas inlet (3) and a gas outlet (4). Two or more pneumatic motor stages (11, 12, 13) are installed in the shell (1). The first pneumatic motor stage is communicated with the gas inlet (3), and the last pneumatic motor stage is communicated with the gas outlet (4). Compressed gas enters the shell (1) through the gas inlet (3), drives the first pneumatic motor stage, then drives the next pneumatic motor stage, and is exhausted from the shell (1) through the gas outlet (4) at last. Every pneumatic motor stage is provided with a power output shaft (112, 122, 132) which is connected to the power output main shaft (2), so that the powers produced by all pneumatic motor stages (11, 12, 13) are jointed together and then output by the power output main shaft (2). The multistage pneumatic motor improves working efficiency greatly, saves energy source and reduces noise.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a pneumatic motor which belongs to the field of mechanical engineering and is used on sites of industrial and mining operation, and particularly relates to an energy-saving and efficient multistage pneumatic motor.BACKGROUND OF THE INVENTION[0002]A pneumatic motor is a mechanical device which takes compressed air as a power source, and has been widely used due to advantages of being light and safe and etc., and is especially widely used on operation sites where electricity is not allowed as a power source and is also a must. Currently used pneumatic motors are all single stage motors. Wherein, the pneumatic motors have many forms of structures, comprising a gear-type motor, a plunger-type motor, a vane-type motor, a screw-type motor and etc., and the most widely used motor in industry such as coal mining is the gear-type motor. The single stage gear-type pneumatic motor is to provide a pair of gears engaging with each othe...

AI Technical Summary

Benefits of technology

The present invention provides a multistage pneumatic motor that has multiple pneumatic motor stages connected in series and used jointly, which maximizes the use of gas energy and reduces the noise of discharged gas. The efficiency of the three-stage pneumatic gear motor provided by the present invention can be enhanced by (40%-50%) compared with the current single-stage pneumatic gear motor, and the noise can be lowered at least 10 decibels based on the prior art. The working principle of the multistage pneumatic motor is as follows: after the compressed air enters the shell of the multistage motor, the gas pressure and volume change after passing each pneumatic motor stage. The present invention fully considers the changes of gas pressure and volume between the multistage motor and uses many methods to achieve that the rotating speeds delivered from the respective motor stages to the power output main shaft are substantially the same, which greatly enhances the total output power.

Problems solved by technology

However, current single stage pneumatic motors have a low working efficiency, the working efficiencies of usual pneumatic motors are not greater than 30%, and the compressed air passes a pair of motor gears and then is directly discharged to the air via the gas outlet, while the gas discharged through the gas outlet still has much energy, thus this results in large energy consumption and low efficiency, and the energy loss of current pneumatic motors is about 70%, which renders huge energy waste; also, discharging such gas with much energy through the shell of the motor would render much noise and even squeaking, which is a pollution to operating personnel and the environment, and does not comply with current requirements on low carbon, energy saving and environment protection.

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