Pump body structure of constant-temperature and high-efficiency roots pump

A high-efficiency, constant temperature technology, applied in the components of pumping devices for elastic fluids, rotary piston/oscillating piston pump components, pumps, etc., can solve the problem of poor heat transfer effect, condensation of liquid or dust accumulation, Burns and other problems, to achieve the effect of improving heat exchange effect, realizing cooling effect and strengthening strength

Active Publication Date: 2019-12-20
兑通真空技术(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, although the heat dissipation area of ​​the pump casing is increased by adding ribs, it still belongs to natural radiation heat dissipation or convection air cooling, and the heat transfer effect is relatively poor, especially the surface temperature of the pump casing near the exhaust port is very high, sometimes exceeding 100 °C, can cause burns if not protected
Secondly, since both sides of the exhaust port at the bottom of the existing Roots pump casing are horizontal, condensed liquid or dust is easier to form and accumulate at the bottom during use

Method used

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  • Pump body structure of constant-temperature and high-efficiency roots pump
  • Pump body structure of constant-temperature and high-efficiency roots pump
  • Pump body structure of constant-temperature and high-efficiency roots pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment one, such as Figure 1-5 As shown, a pump body structure of a constant temperature and high-efficiency Roots pump, the upper end of the pump casing 1 is provided with an air inlet 2, the lower end of the pump casing 1 is provided with an exhaust port 3, the inner cavity of the pump casing 1 is installed with a Roots rotor, and the pump casing 1 There is a jacket layer 4 inside the casing, and a number of reinforcing ribs 5 are fixedly installed in the jacket layer 4, and an oval through hole 6 for circulation is opened on the side of each reinforcing rib 5; A number of liquid outlets 7 and liquid inlets 8 are opened, and the liquid outlets 7 and liquid inlets 8 are all connected to the jacket layer 4; the jacket layer 4 is not only covered on both sides of the pump casing 1, but also on the Around the intake port 2 and the exhaust port 3.

[0027] When in use, the cooling water enters the jacket layer 4 through the liquid inlet 8 on the end face of the pump ...

Embodiment 2

[0030] Embodiment 2, based on a further improvement of Embodiment 1, at least one casting hole 13 is opened on both sides of the pump casing 1 , and each casting hole 13 is located between two reinforcing ribs 5 . The outer surface of the casting hole 13 is provided with a first sealing groove 9, and a first O-shaped sealing ring is installed in the first sealing groove 9, and the outer surface of the casting hole 13 is fixed with a jacket water layer panel by screws. By placing each casting hole 13 just between the two reinforcing ribs 5, it is ensured that the casting holes 13 will not affect the strength of the pump casing 1 and the jacket layer 4, and there is more space for casting Convenience; then seal the surface of the casting hole 13 by installing the jacket water layer panel and the first O-shaped sealing ring, so that a sealed cavity is formed in the jacket layer 4 .

Embodiment 3

[0031] Embodiment 3, based on the further improvement of Embodiment 1, the end face of the pump casing 1 corresponding to the liquid outlet 7 and the liquid inlet 8 is uniformly provided with several bolt holes 10, and the bolt holes 10 are connected with the liquid outlet 7 and the liquid inlet 8. Phase staggered. The inner chamber of the pump casing 1 is provided with a second sealing groove 11 along the circumference of the outer end surface, and a second O-ring is installed in the second sealing groove 11 . Therefore, during actual operation, the cooling liquid can enter or flow out of the jacket layer 4 of the pump casing 1 from the end cover adjacent to the pump casing 1, without resetting the liquid inlet or liquid outlet on the surface of the pump casing 1; and By installing a second O-ring seal between the inner cavity of the pump casing 1 and the liquid inlet 8 and the liquid outlet 7 of the jacket layer 4 , the coolant can be effectively prevented from penetrating i...

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PUM

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Abstract

A pump body structure of a constant-temperature and high-efficiency roots pump comprises a pump shell. A gas inlet is formed in the upper end of the pump shell. An exhaust port is formed in the lowerend of the pump shell. A jacket layer is formed in the middle of the pump shell. Multiple reinforcing ribs are fixedly installed in the jacket layer. Circulation ellipse through holes are formed in the side face of each reinforcing rib. Multiple liquid inlets and liquid outlets are formed in the end faces of the two sides of the pump shell. The liquid outlets and the liquid inlets all communicatewith the jacket layer. The pump body structure overcomes the defects in the prior art, and the jacket layer of the whole pump is rapidly filled with cooling liquid or compressed air through the liquidinlets in the end faces of the pump shell; and because the specific heat capacity of liquid is far higher than that of gas, the compressed air conducts forced-convection heat exchange, the outlet flow of a cooling medium can also be controlled, or constant temperature or temperature rise of the pump shell is achieved by injecting a hot medium, the wall of the pump shell reaches the assigned temperature, the cooling effect can be improved, and constant-temperature control can also be achieved.

Description

technical field [0001] The invention relates to the technical field of Roots pumps, in particular to a pump body structure of a constant temperature and high-efficiency Roots pump. Background technique [0002] Roots vacuum pump (referred to as Roots pump) is a rotary variable displacement vacuum pump, which evolved from Roots blower. The ultimate vacuum of the Roots pump depends not only on the structure and manufacturing accuracy of the pump itself, but also on the ultimate vacuum of the backing pump. In order to improve the ultimate vacuum of the pump, Roots pumps can be used in series. The working principle of the Roots pump is that through the continuous rotation of the rotor, the pumped gas is sucked from the air inlet into the space v0 between the rotor and the pump casing, and then discharged through the exhaust port. [0003] In the pump casing of all Roots vacuum pumps or Roots blowers on the market, a pair of Roots rotors can be placed in the pump chamber. The ...

Claims

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Application Information

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IPC IPC(8): F04C29/00F04C29/04F04C18/12
CPCF04C18/126F04C29/00F04C29/042F04C2240/30
Inventor 荣易李悦沈淼乐
Owner 兑通真空技术(上海)有限公司
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