Diesel Engine Throttle Regulator for Mobile Screw Compressor

Abstract

The invention provides a diesel engine accelerator regulator of a movable screw compressor, which ensures that a diesel engine can normally and stably work under two states of no-load low speed and low speed with pressure unloading. The diesel engine accelerator regulator comprises a loading spring piston, a loading end spring, a rear cylinder body, an idling positioning ring, an accelerator synchronizing piston, an unloading end spring, a front cylinder body and an accelerator pull rod, wherein the idling positioning ring is arranged between installing contact surfaces of the front cylinder body and the rear cylinder body, the loading end spring is arranged in a working cavity formed between the accelerator synchronizing piston and the loading spring piston in an ejecting manner, the accelerator pull rod is arranged on the accelerator synchronizing piston through threads in a fastening manner, and the unloading end spring is sleeved on the part of the accelerator pull rod, which is positioned in the front cylinder body. The diesel engine accelerator regulator is characterized in that a low-speed positioning ring is arranged in a cavity between the loading spring piston and the accelerator synchronizing piston and is fastened on the loading spring piston, and the length of the low-speed positioning ring is less than that of the loading end spring under a pressure-free state.

Description

technical field [0001] The invention relates to a diesel engine oil circuit control structure of a mobile screw compressor, in particular to a diesel throttle regulator for a mobile screw compressor. Background technique [0002] Diesel engine-driven air compressors for general engineering applications have the following three specific working conditions: The unit starts with no load. 30% of the power; in the high-speed loading condition, the air supply pressure and air volume reach the rated value at this time, and the power reaches the rated power; Reduce the speed of the diesel engine to reduce the air supply. At this time, the load torque of the air compressor is slightly higher than the full load torque, which is almost equal, and the power accounts for about 60% of the rated power. [0003] The diesel engine governor of the existing mobile screw compressor, its structure is shown in figure 1 : It includes loading spring piston 1, loading end spring 2, rear cylind...

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Problems solved by technology

[0006] In actual use, there are the following defects: when the air compressor is loaded, high-pressure air enters chamber A, and the air pressure pushes the loading spring piston 1, compressing the loading end spring 2, which in turn pushes the loading spring piston 1 forward, and then pushes the throttle lever 8 forward , the diesel engine enters the high-speed gear ,See image 3 ; When the working pressure of the air compressor exceeds the rated pressure, the unloaded high-pressure air enters the C cavity, and the air pressure pushes the throttle synchronous piston 5 to overcome the spring force and drive the throttle rod 8 backward, so that the speed of the diesel engine decreases and the air supply volume is reduced. Stabilize the air supply pressure of the air compressor; when the unloaded high-pressure air continues to enter the C cavity, the throttle synchronization piston touches the idle speed positioning ring, the throttle lever 8 resets, and the diesel engine enters the low-speed gear ,See Figure 4 ,

[0007] This is because the throttle is at the same position at the low speed with no load and the low speed with pressure unloading. For the diesel engine, it can run stably at low speed with no load due to the small resistance torque, but at low speed with pressure unloading, due to the large resistance torque, At this time, the operation cannot be maintained, and it is easy to turn off the flame

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