阅读说明：本技术 一种恒温高效罗茨泵的泵体结构 (Pump body structure of high-efficient lobe pump of constant temperature ) 是由 荣易 李悦 沈淼乐 于 2019-09-23 设计创作，主要内容包括：一种恒温高效罗茨泵的泵体结构,包括泵壳,泵壳上端开设进气口,泵壳下端开设排气口,泵壳中间开设有夹套层,夹套层内固定安装有若干加强筋,且每个加强筋的侧面上均开设有流通椭圆通孔；泵壳的两侧端面的开设多个进出液口,出液口和进液口均与夹套层相连通。本发明克服了现有技术的不足,冷却液或者压缩空气通过泵壳端面的进液口快速的填充整个泵的夹套层,由于液体的比热容远远高于气体,而压缩空气则是强制对流换热,从而相比于原有的辐射散热,均可以大幅提高了换热效果,还可以对冷却介质的出口流量进行控制,或是通入热的介质实现泵壳的恒温或者加温,泵壳壁达到指定温度,不仅能提升冷却效果,还能实现恒温控制。(A pump body structure of a constant-temperature high-efficiency roots pump comprises a pump shell, wherein an air inlet is formed in the upper end of the pump shell, an air outlet is formed in the lower end of the pump shell, a jacket layer is formed in the middle of the pump shell, a plurality of reinforcing ribs are fixedly arranged in the jacket layer, and a circulation oval through hole is formed in the side surface of each reinforcing rib; the end surfaces of the two sides of the pump shell are provided with a plurality of liquid inlet and outlet ports, and the liquid outlet and the liquid inlet are both communicated with the jacket layer. The invention overcomes the defects of the prior art, the cooling liquid or the compressed air rapidly fills the jacket layer of the whole pump through the liquid inlet on the end surface of the pump shell, the specific heat capacity of the liquid is far higher than that of the gas, and the compressed air is forced convection heat transfer, so that the heat transfer effect can be greatly improved compared with the original radiation heat dissipation, the outlet flow of the cooling medium can be controlled, or the heat medium is introduced to realize the constant temperature or heating of the pump shell, the wall of the pump shell reaches the specified temperature, the cooling effect can be improved, and the constant temperature control can be realized.)

1. The utility model provides a pump body structure of high-efficient lobe pump of constant temperature, includes pump case (1), air inlet (2) are seted up to pump case (1) upper end, gas vent (3) are seted up to pump case (1) lower extreme, lobe rotor, its characterized in that are installed to pump case (1) inner chamber: a jacket layer (4) is arranged in the shell of the pump shell (1), a plurality of reinforcing ribs (5) are fixedly arranged in the jacket layer (4), and the side surface of each reinforcing rib (5) is provided with an oval through hole (6) for circulation; the pump case (1) both sides terminal surface seted up a plurality of liquid outlets (7) and inlet (8), liquid outlet (7) and inlet (8) all are linked together with jacket layer (4).

2. The pump body structure of the constant-temperature high-efficiency roots pump as claimed in claim 1, wherein: the jacket layer (4) is coated on two sides of the pump shell (1) and also coated around the air inlet (2) and the air outlet (3).

3. The pump body structure of the constant-temperature high-efficiency roots pump as claimed in claim 1, wherein: at least one casting hole (13) is formed in each side face of the pump shell (1), and each casting hole (13) is located between the two reinforcing ribs (5).

4. The pump body structure of the constant-temperature high-efficiency roots pump as claimed in claim 3, wherein: the surface of casting hole (13) is provided with first seal groove (9), install first O type sealing washer in first seal groove (9), there is the jacket water layer panel casting hole (13) surface through screw fixed mounting.

5. The pump body structure of the constant-temperature high-efficiency roots pump as claimed in claim 1, wherein: the pump case (1) terminal surface that liquid outlet (7) and inlet (8) correspond evenly is provided with a plurality of bolt holes (10), bolt hole (10) stagger mutually with liquid outlet (7) and inlet (8).

6. The pump body structure of the constant-temperature high-efficiency roots pump as claimed in claim 5, wherein: the inner cavity of the pump shell (1) is provided with a second sealing groove (11) along the circumferential position of the outer end face, and a second O-shaped sealing ring is installed in the second sealing groove (11).

7. The pump body structure of the constant-temperature high-efficiency roots pump as claimed in claim 1, wherein: the upper side and the lower side of the inner cavity of the pump shell (1) close to the air inlet (2) and the air outlet (3) are respectively provided with a slope of 10-15 degrees.

8. The pump body structure of the constant-temperature high-efficiency roots pump as claimed in claim 1, wherein: the diameter of the section of the inner cavity of the pump shell (1) is gradually increased from the two ends of the inner cavity of the pump shell (1) to the center of the inner cavity of the pump shell (1).

9. The pump body structure of the constant-temperature high-efficiency roots pump as claimed in claim 1, wherein: the lower surface of the pump shell (1) is fixedly welded with a supporting and fixing frame (12).

Technical Field

The invention relates to the technical field of roots pumps, in particular to a pump body structure of a constant-temperature high-efficiency roots pump.

Background

A roots vacuum pump (roots pump for short) is a rotary positive displacement vacuum pump developed from roots blowers. The ultimate vacuum of a roots pump depends on the ultimate vacuum of a backing pump in addition to the structure and manufacturing precision of the pump. In order to improve the ultimate vacuum degree of the pump, the roots pump can be used in series. The roots pump operates on the principle that pumped gas is sucked into a space v0 between the rotor and the pump shell from an air inlet and then is discharged from an air outlet through the continuous rotation of the rotor.

In all the pump cases of the roots vacuum pumps or roots blowers on the market, a pair of roots rotors can be placed in the pump cavity. The pump cavity is formed by a plurality of reinforcing ribs, so that the pump shell is strengthened, and the heat dissipation area of the pump shell is increased. The pump shell of the Roots vacuum pump or the Roots blower is simple in structure and convenient to cast.

However, the heat dissipation area of the pump shell is increased by adding the reinforcing ribs, the pump shell still belongs to natural radiation heat dissipation or convection air cooling, the heat exchange effect is poor, particularly, the surface temperature of the pump shell measured close to the exhaust port is very high and sometimes exceeds 100 ℃, and scalding can be caused if no protective measures are taken. Secondly, because the two sides of the exhaust port at the bottom of the existing Roots pump shell are horizontal, condensed liquid or dust is easy to accumulate at the bottom in the using process.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a pump body structure of a constant-temperature high-efficiency roots pump, which overcomes the defects of the prior art, cooling water enters a jacket layer through a liquid inlet on the end surface of a pump shell, the jacket layer is coated on two sides of the pump shell and also coated around an air inlet and an air outlet so as to realize full coverage of the jacket, so that the jacket layer of the whole pump is quickly filled with the cooling liquid, and the specific heat capacity of the liquid is far higher than that of gas and belongs to forced convection, so that compared with the original radiation heat dissipation, the heat exchange effect is improved by 20-50 times, and the cooling effect can be effectively realized.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a pump body structure of a constant-temperature high-efficiency roots pump is characterized in that an air inlet is formed in the upper end of a pump shell, an air outlet is formed in the lower end of the pump shell, a roots rotor is installed in an inner cavity of the pump shell, a jacket layer is formed in the shell of the pump shell, a plurality of reinforcing ribs are fixedly installed in the jacket layer, and an oval through hole for circulation is formed in the side surface of each reinforcing rib; the pump case both sides terminal surface seted up a plurality of liquid outlets and inlet, liquid outlet and inlet all are linked together with pressing from both sides the jacket layer.

Preferably, the jacket layer covers both sides of the pump housing and also covers the periphery of the air inlet and the air outlet.

Preferably, at least one casting hole is formed in each of the two side faces of the pump shell, and each casting hole is located between the two reinforcing ribs.

Preferably, the surface in casting hole is provided with first seal groove, install first O type sealing washer in the first seal groove, there is the jacket water layer panel casting hole surface through screw fixed mounting.

Preferably, the pump case end face that liquid outlet and inlet correspond evenly is provided with a plurality of bolt holes, the bolt hole staggers mutually with liquid outlet and inlet.

Preferably, a second sealing groove is formed in the inner cavity of the pump shell along the circumference of the outer end face, and a second O-shaped sealing ring is installed in the second sealing groove.

Preferably, the upper side and the lower side of the inner cavity of the pump shell, which are close to the air inlet and the air outlet, are provided with slopes of 10-15 degrees.

Preferably, the cross-sectional diameter of the pump casing inner cavity is gradually increased from two ends of the pump casing inner cavity to the center of the pump casing inner cavity.

Preferably, a support fixing frame is fixedly welded on the lower surface of the pump shell.

The invention provides a pump body structure of a constant-temperature high-efficiency roots pump. The method has the following beneficial effects: cooling water enters the jacket layer through a liquid inlet on the end face of the pump shell, the jacket layer is coated on two sides of the pump shell and also coated around the air inlet and the air outlet so as to realize full coverage of the jacket, so that the cooling liquid can quickly fill the jacket layer of the whole pump, and the specific heat capacity of the liquid is far higher than that of gas and belongs to forced convection, so that compared with the original radiation heat dissipation, the heat exchange effect is improved by 20-50 times, and the cooling effect can be more effectively realized; meanwhile, by arranging the reinforcing ribs, the strength of the cavity of the pump shell can be enhanced, and the strength of the jacket layer is enhanced, so that the stability of the fully-covered jacket layer is ensured during use; and by arranging a slope of 10-15 degrees in the inner cavity of the pump shell, the condensed liquid drops formed by cooling in the working process can be ensured to flow out of the exhaust port through the slope without being accumulated in the pump cavity.

Drawings

In order to more clearly illustrate the present invention or the prior art solutions, the drawings that are needed in the description of the prior art will be briefly described below.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic radial cross-sectional view of the pump casing of the present invention;

FIG. 3 is a schematic horizontal cross-sectional view of the pump casing of the present invention;

FIG. 4 is a first axial cross-sectional view of the pump casing of the present invention;

FIG. 5 is a second schematic axial cross-sectional view of the pump casing of the present invention (as shown in FIG. 5, the diameter of the inner cavity of the pump casing gradually increases from the end surface of the pump casing to the center of the pump casing);

the reference numbers in the figures illustrate:

1. a pump housing; 2. an air inlet; 3. an exhaust port; 4. a jacket layer; 5. reinforcing ribs; 6. an elliptical through hole; 7. a liquid outlet; 8. a liquid inlet; 9. a first seal groove; 10. bolt holes; 11. a second seal groove; 12. supporting the fixed frame; 13. and (5) casting the hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings.