Special suction device for thin oil lubricating equipment

Abstract

The invention discloses a special absorption-assisting device for thin-oil lubricating equipment, comprising an oil storage tank, an oil absorbing pipe, an oil outlet pipe and an emptying device, wherein the top end of the oil storage tank is provided with an oil filling cap, and the side surface of the oil storage tank is provided with an oil vernier window; the oil absorbing pipe is connected with a flange at the bottom part of the oil storage tank, one end of the oil absorbing pipe is arranged in the oil storage tank, an end opening of the oil absorbing pipe is upward and is higher than the scale mark on the vernier window; the other end of the oil absorbing pipe is arranged in lubricating oil liquid stored in the oil tank; one end of the oil outlet pipe is arranged in the oil storage tank, an end opening of the oil outlet pipe is downward and is positioned at the low position of the oil storage tank; the other end of the oil outlet pipe is arranged outside the oil storage tank and is connected with an oil inlet pipeline of an thin-oil lubricating oil-delivery pump; and the emptying device is communicated with the top of the oil storage tank and a pipe body of the oil inlet pipeline. In the special absorption-assisting device, self absorption is achieved by utilizing negative pressure in the sealed oil storage tank, a high-low position design is adopted for the oil openings of the oil absorbing pipe and the oil outlet pipe in the tank, the oil supply to the oil-delivery pump is ensured, the emptying device is arranged for protecting the negative pressure, so that the long-term normal operation of the thin-oil lubricating equipment is fundamentally met, and simultaneously the service life of the oil-delivery pump of the thin-oil lubricating equipment is also greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of thin oil lubricating equipment, in particular to a special suction device for thin oil lubricating equipment. Background technique [0002] Thin oil lubrication equipment mainly transports the lubricating oil to the friction parts of the machine equipment through the oil delivery pump, and forms an oil film between the machine parts that are running relatively, thereby reducing the friction and wear of the parts, and at the same time flushing the friction parts and taking away the heat , to ensure long-term normal operation of equipment and prolong the service life of machinery and equipment. [0003] To ensure long-term continuous and uninterrupted oil supply to machinery and equipment, the basic requirements are: the oil delivery pump must be equipped with a backup oil delivery pump, and at the same time, a check valve is installed at the outlet of the two pumps, that is, one is working and the other is...

AI Technical Summary

Problems solved by technology

When the oil delivery pump works, it mainly relies on the rotation of the gear (gear pump) or vane (vane pump) or screw (screw pump) to form a certain negative pressure to absorb oil. After the pump works for a long time, its sealing surface will be worn to a certain extent. After the sealing surface is worn, the gap of the sealing surface will increase, and its self-priming ability will decrease, so that the next time it starts up, it will not be able to absorb oil due to long-term idling, which will aggravate the wear of the sealing surface and damage the oil delivery pump.

Especially in the case of using a high-level oil tank to supply oil, when the oil delivery pump is restarted after a period of time in the standby state, the following problems will occur: there is no residual oil in the pump cavity to form an oil film that can generate sufficient suction vacuum, and the oil from the high level The oil at the oil level of the oil tank creates a static pressure head on the check valve at the pump outlet, and the gas discharged from the pump rotates and empties because it cannot push the check valve to accelerate internal leakage. Therefore, even if the sealing surface of the pump has not been worn, it will Due to the assembly clearance problem of the pump during the manufacturing process, the oil delivery pump cannot work normally

[0004] The traditional solution is firstly to select the type, by adopting a screw type oil pump with good self-priming ability, more stable operation and less affected by wear, etc., and secondly, to minimize the suction distance of the oil pump and shorten the oil pump. The emptying time when the oil pump is started, and the separate setting of the oil delivery pump and the oil tank, so that the liquid level of the oil tank is higher than the pump inlet and flows into the oil delivery pump by itself. The above two methods have improved the service life of the pump, but still It cannot meet the long-term normal use of the oil pump, and the third treatment method cannot meet the requirements of most working conditions

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