Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Mechanism for reducing quantity of oil accumulated in pump cavity of vacuum pump

A vacuum pump and oil accumulation technology, which is applied to the components, pump components, mechanical equipment, etc. of the pumping device for elastic fluid, which can solve the problem of increasing the starting torque of the vacuum pump, increasing the viscosity of the lubricating oil, and increasing the resistance of the sliding vane. and other problems, to achieve the effect of reducing oil accumulation in the pump cavity, simple structure, and ensuring reliable and stable work.

Inactive Publication Date: 2016-04-27
WUXI MINGZHI PUMP IND
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the vacuum pump is working, in order to lubricate, seal and dissipate heat, it is necessary to introduce the engine oil from the engine oil outlet into the pump cavity from the vacuum pump oil inlet. When the vacuum pump stops rotating, there is negative pressure (close to vacuum state) in the pump cavity. When the lubricating oil in the engine oil passage is under the negative pressure of the pump chamber, it will be pumped into the pump chamber, and a lot of lubricating oil will accumulate in the pump chamber. The accumulated lubricating oil will increase the sliding vane resistance when the vacuum pump is started, and increase The starting torque of the large vacuum pump, especially at low temperature, the viscosity of the lubricating oil will increase. The accumulated lubricating oil will greatly increase the resistance of the sliding vane when the vacuum pump is started at a low temperature and cold, and may cause the vane to break in extreme cases. , causing the vacuum pump to fail

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Mechanism for reducing quantity of oil accumulated in pump cavity of vacuum pump
  • Mechanism for reducing quantity of oil accumulated in pump cavity of vacuum pump
  • Mechanism for reducing quantity of oil accumulated in pump cavity of vacuum pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] see figure 1 and figure 2 As shown, in this embodiment, a mechanism for reducing the amount of oil accumulated in the pump chamber of a vacuum pump includes a pump body 1 and an oil discharge hole 2, and the oil discharge hole 2 is opened on the pump body 1 and connected to the pump body The pump cavity is connected, and an oil baffle 3 is arranged on the pump body 1 in conjunction with the oil discharge hole 2. The oil discharge hole 2 is an arc-shaped structure, and the oil baffle 3 cooperates with the oil discharge The hole 2 is also arranged in a circular arc shape, the head end of the oil baffle 3 is fixed on the pump body 1 through the fixing screw 4 as a fixed end, and the tail end is attached to the oil discharge hole 2 as a non-fixed end. At the tail end, the pump body 1 at the tail end of the oil discharge hole 2 is provided with a vent groove 5 with a small section outside the oil baffle plate 3, and the vent groove 5 connects the oil discharge hole 2 with ...

Embodiment 2

[0024] see image 3 and Figure 4 As shown, the difference between the present embodiment and the first embodiment lies in that the opening positions of the ventilation slots 5 are different, and the other structures are the same. In this embodiment, the oil discharge hole 2 has an arc-shaped structure, and the vent groove 5 is opened on the pump body 1 outside the oil discharge hole 2 and is located at the head end of the oil discharge hole 2 .

Embodiment 3

[0026] see Figure 5 and Image 6 As shown, the difference between the present embodiment and the first embodiment lies in that the opening positions of the ventilation slots 5 are different, and the other structures are the same. In this embodiment, the oil discharge hole 2 has an arc-shaped structure, and the vent groove 5 is opened on the pump body 1 inside the oil discharge hole 2 and is located at the head end of the oil discharge hole 2 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a mechanism for reducing a quantity of oil accumulated in a pump cavity of a vacuum pump. The mechanism comprises a pump body and an oil discharge hole; the oil discharge hole is formed in the pump body, and is communicated with the pump cavity of the pump body; an oil baffle plate matched with the oil discharge hole is arranged on the pump body; and a ventilation tank for communicating the oil discharge hole with external atmosphere is formed in the pump body. The mechanism for reducing the quantity of the oil accumulated in the pump cavity of the vacuum pump is added with the small-section ventilation tank in the oil discharge hole of the pump body, so that the atmosphere and the pump cavity are communicated through a small-section channel; negative pressure in the pump cavity is timely reduced and eliminated after stop to prevent oil pumping to the pump cavity due to the negative pressure, so that the oil accumulated in the pump cavity is reduced; and the mechanism is simple, easy to realize and skillful in design, effectively reduces the quantity of the oil accumulated in the pump cavity of the vacuum pump, and guarantees working reliability and stability of the vacuum pump.

Description

technical field [0001] The invention relates to an automobile vacuum pump, in particular to a mechanism for reducing the amount of oil accumulated in the pump cavity of the vacuum pump. Background technique [0002] During the working process of the automotive vacuum pump, the rotor drives the sliding vane to rotate, and the volume of the pumping area of ​​the pump chamber increases to form a negative pressure. Increase, air and oil are discharged through the air outlet of the vacuum pump exhaust valve. [0003] However, when the vacuum pump is working, in order to lubricate, seal and dissipate heat, it is necessary to introduce the engine oil from the engine oil outlet into the pump cavity from the vacuum pump oil inlet. When the vacuum pump stops rotating, there is negative pressure (close to vacuum state) in the pump cavity. When the lubricating oil in the engine oil passage is under the negative pressure of the pump chamber, it will be pumped into the pump chamber, and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F04C29/02
CPCF04C29/02
Inventor 许明姚伟潘中生任宁濮思源崔盼
Owner WUXI MINGZHI PUMP IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com