Automatic temperature rise control device for crankshaft and bearing bushes of mechanical press

Abstract

An automatic temperature rise control device for a crankshaft and bearing bushes of a mechanical press comprises a machine body, the crankshaft, a first supporting sleeve, a second supporting sleeve, a connecting rod cover, a connecting rod, a first shaft end bearing bush, a second shaft end bearing bush and a connecting rod bush; an air circuit temperature control system and a temperature detection and control system are arranged on the machine body; the air circuit temperature control system comprises an air cooling machine arranged on the machine body; the air cooling machine is connected with an air distributor; the air distributor communicates with spiral grooves formed in inner walls of the first supporting sleeve, the second supporting sleeve, the connecting rod cover and the connecting rod through multiple air inlet pipes; the temperature detection and control system comprises a controller and multiple temperature sensors for detecting the temperatures of the first shaft end bearing bush, the second shaft end bearing bush and the connecting rod bush; the temperature sensors are connected with the controller through circuits; and the controller is connected with the air cooling machine through a circuit. The control device has the advantages that the working temperature of the bearing bushes is automatically controlled, the design clearance is reduced, the service life of the crankshaft and the service life of the bearing bushes are prolonged, the operation speed and precision of the crankshaft is improved, the production efficiency is high, the product quality is high, and the like.

Description

Technical field: [0001] The invention relates to the technical field of mechanical presses, in particular to an automatic control device for temperature rise of crankshafts and bearing bushes of mechanical presses. Background technique: [0002] Such as Figure 1-2 As shown, the relative motion between the crankshaft of the existing crankshaft-type mechanical press and the bearing pad at the shaft end and the connecting rod pad is a sliding friction pair, and the bearing pad at the shaft end and the connecting rod pad are generally collectively referred to as the bearing pad. The bearing bush at the shaft end adopts manual multi-point grease lubrication pump to manually lubricate as needed, and the connecting rod bush adopts electric grease lubrication pump and quantitative distributor to automatically supply oil intermittently according to the setting. Lubricating machines with low mechanical performance requirements can basically meet the requirements, but cannot meet the ...

AI Technical Summary

Problems solved by technology

[0004] There is sliding friction between the crankshaft and the bearing bush. When the crankshaft rotates rapidly and continuously for a long time, it will generate friction and heat. The gap between the crankshaft and the bearing bush will decrease, and the wear degree of the bearing bush will increase, which will further accelerate the wear of the bearing bush, and even cause the bearing bush to be damaged. Or maintenance affects production

Sometimes in order to avoid wear and tear, in the design and manufacture, the clearance of the thermal expansion of the crankshaft and the bearing bush is reserved in advance, but this will inevitably reduce the precision of the crankshaft movement and the precision of the mechanical press.

Or generally increase the oil supply to reduce the friction coefficient between the crankshaft and the bearing bush. Although the increase in oil can indirectly reduce part of the heat, a large amount of oil is likely to cause waste, pollute the environment, and increase the work for workers to clean up the oil. quantity

None of the above technical solutions can fundamentally solve the problem of continuous temperature rise caused by the high-speed rotation of the crankshaft and bearing bush

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