CN208651148U - A kind of water lubrication twin-screw compressor screw structure - Google Patents

Abstract

The utility model discloses a kind of water lubrication twin-screw compressor screw structures, are made of the driving of stainless steel male rotor in the mother rotor that high rigidity PEEK engineering plastics are inlayed in section garden position.To make large-scale water spray screw compression function reach biggish capacity and guaranteeing that compressor is run steadily in the long term, driving side and sealed sides of the screw rotor structure using stainless steel male rotor and mother rotor in section garden position inlay PEEK engineering plastic structure.Finally, again the mother rotor fine grinding of PEEK will be inlayed in place with special purpose grinder.For the binding force for improving section garden position high rigidity PEEK engineering plastics and stainless steel mother rotor, spy is processing a spiral groove in mother rotor each tooth form section garden position two sides respectively.The manufacture difficulty of large-scale water spray rotor of helical lobe compressor can be greatly reduced in the utility model, and it is very beneficial for the helical-lobe compressor structure using water-spraying control lubrication, and the manufacturing cost of water lubrication helical-lobe compressor can be finally reduced, greatly improve large-scale water spray helical-lobe compressor service life.

Description

A kind of water lubrication twin-screw compressor screw structure

Technical field

The utility model relates to water lubrication double-screw compressor, in particular to a kind of water lubrication twin-screw compressor screw knot Structure.

Background technique

Currently, oil-free lubrication screw air compressor is broadly divided into water lubrication oil free screw compressor and dry type oil free screw Two class of compressor.

Wherein, it is cooled down and is lubricated without any liquid in the compression chamber of dry type oil-free screw compressor；But in axis Holding in chamber and synchronous gear box has lubricating oil to be cooled down and lubricated.Therefore, bearing bore and compression chamber are needed through sealing dress It sets and is isolated, to realize the not oil-containing of compressor air-discharging 100%.Due to being free of in the compression chamber of dry type oil-free screw compressor Any liquid, male and female rotor do not contact, and internal leakage is big, and volumetric efficiency is low.To make up the big disadvantage of internal leakage, dry type oil free screw Compressor rotary speed designs very high, and the delivery temperature of dry-pressing contracting leads to the single-stage pressure at expulsion of the type close to 200 DEG C in this way It is low, need two-stage series connection to compress, it is high so as to cause unit gas production energy consumption.In dry screw compressor, due to not lubricating The lubrication of oil and molecule is taken away, gas can generate corrosion to rotor, inner walls, air flue, therefore in traditional exhaust end base of oil injection threaded bolt On the basis of rotor material, it will usually which spraying corrosion resistant coating, such as spraying polytetrafluoroethylene (PTFE), molybdenum disulfide, Teflon reach guarantee The effect that rotor is indeformable, is not corroded.The technique of anticorrosion with painting coating is one of difficult point.It was verified that dry type is oil-free at present The service life of helical-lobe compressor is short, and averagely only more than 3 years, the coating corrosion of mainly rotor surface falls off and causes.

Wherein, water lubrication oil free screw compressor includes two classes: the first kind is in above-mentioned dry type oil-free screw compressor Water-spraying control and sealed engagement gap are carried out, remaining structure and dry type are without whelk other than rotor material is aluminium bronze and stainless steel Bar compressor is consistent；Second class is that have self-lubricating and wear-resisting special formulation work in rotor profile of screw compressor surface cladding Engineering plastics, so as to realize that male rotor driving mother rotor realizes the compression process of gas, and using complete water lubrication Transverse bearing and complete water lubricating thrust bearing, entire compressor host and system structure are very simple.

The common feature of aforementioned two classes water lubrication oil free screw compressor is the intracavitary carry out water-spraying control of compressor operating, water Also the sealing fluid as back lash between rotor, inter-tooth volume is high-efficient, and can the oil-free compressed air of output 100%.By There was only 45 DEG C or so of water in spraying into temperature in compression chamber, compression process is isotherm compression, and dry type may be implemented in single-stage pressure ratio The gas pressure of oil free screw air compressor machine two stages of compression.Therefore, water lubrication oil free screw compressor is than dry type oil free screw pneumatics Engine efficiency improves 30%.Water profit is low without cunning screw air compressor maintenance cost, only needs to change water, water filter and air filtration Device.

Currently, the second class water lubrication double-screw compressor on domestic and international market mainly has the Atlas Copco of Sweden With the German AQUAAIR of Germany.The parts of tooth of the water lubrication rotor of helical lobe compressor of above-mentioned two company is using valuableness The rotor that processes of engineering plastics bar.Prime cost among these is modified PE EK engineering plastics dosage and molding and note Modeling expense, one ton of high-quality modified PE EK engineering plastics price is 800,000 yuans, especially in large-scale water lubrication screw compression Increased costs is more in machine.

In conclusion the structural advantage of the complete water lubrication double-screw compressor of the second class under the conditions of state of the art is non- Chang Mingxian, but the engineering plastics of valuableness keep its material cost very high in the rotor, especially compress in large-scale water lubrication twin-screw Machine cost is more obvious, it would be highly desirable to which the screw rotor structure for having one kind new is to solve the above problems.

Utility model content

The technical issues of the utility model solves is to provide a kind of solution water lubrication double-screw compressor rotor coating can not By a kind of water lubrication twin-screw compressor screw structure of problem.

The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of water lubrication twin-screw compressor screw Structure, including male rotor and mother rotor, mother rotor each tooth form section garden position two sides are processed respectively for female turn to be arranged The spiral groove of sub- sealed sides high rigidity PEEK helical plastic and mother rotor driving side high rigidity PEEK helical plastic, the revolution Son is bonded with mother rotor driving side high rigidity PEEK helical plastic outer surface, so that mother rotor be driven to rotate.

Further, the opening of the stainless steel mother rotor spiral groove from internal rotor to rotor outer surface direction by It is big successively to successively decrease to small.

Further, the helical-lobe compressor male rotor is stainless steel and mother rotor material of main part is stainless steel.

Further, the spiral groove can be tooth form groove, spiral groove or trapezoidal groove.

The beneficial effects of the utility model are: compared with prior art, a kind of double spiral shells of water lubrication described in the utility model Bar compressor, mainly sealed sides and driving side open up spiral groove to add high rigidity PEEK on the line of mother rotor tooth form section garden Helical plastic and form nonmetallic driving band and band, considerably reduce expensive PEEK engineering plastics dosage, while Reduce molding and injection molding difficulty and cost.It can be subtracted using the screw rod mother rotor structure or revolution minor structure of the utility model The material cost of small screw rotor improves the volumetric efficiency of screw rod mechanism, especially reduces large-scale water lubrication double-screw compressor Manufacturing cost, very have market value.

Detailed description of the invention

Fig. 1 is the stainless steel mother rotor tomograph using the utility model；

Fig. 2 is the stainless steel mother rotor main view using the utility model；

Fig. 3 is the stainless steel mother rotor teethed end faces view using the utility model；

Fig. 4 is the stainless steel mother rotor tooth form partial enlarged view using the utility model；

Fig. 5 is the stainless steel mother rotor tooth form three-dimensional partial enlarged view using the utility model；

Fig. 6 is stainless steel mother rotor tooth form the second conceptual schematic drawing of groove using the utility model；

Fig. 7 is the stainless steel mother rotor tooth form groove third conceptual schematic drawing using the utility model；

Appended drawing reference in figure are as follows: 1-mother rotor；2-sealed sides high rigidity PEEK helical plastics；3-driving side high rigidity PEEK helical plastic；4-sealed sides round screw thread grooves；5-driving side round screw thread grooves；6-sealed sides trapezoid spirals are recessed Slot；7-driving side trapezoid spiral grooves；21-sealed sides PEEK helical plastic outer surfaces；22-sealed sides PEEK helical plastics Inner surface；31-driving side PEEK helical plastic outer surfaces；32-driving side PEEK helical plastic inner surfaces.

Specific embodiment

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

The utility model discloses a kind of water lubrication twin-screw compressor screw structure, including male rotor and mother rotor 1, institutes 1 each tooth form section garden position two sides of mother rotor are stated to be processed respectively for mother rotor sealed sides high rigidity PEEK helical plastic to be arranged The spiral groove of 2 and mother rotor driving side high rigidity PEEK helical plastic 3, the male rotor and mother rotor driving side high rigidity PEEK helical plastic outer surface 31 is bonded, so that mother rotor 1 is driven to rotate, the opening of 1 spiral groove of stainless steel mother rotor Successively successively decrease from large to small from internal rotor to rotor outer surface direction, the helical-lobe compressor male rotor is stainless steel and female turn Sub- material of main part is stainless steel.

In the helical-lobe compressor course of work, it is in male rotor section garden position that male rotor driving mother rotor, which is rotated, Driving band drive the driving band of mother rotor section garden position, remaining position of rotor is not contact condition.Therefore, from aforementioned screw rod The contact situation of the compressor drum course of work is set out, and the utility model proposes following design scheme, which is not only answered It drives at band and band, is equally applicable at male rotor section garden driving band and band for mother rotor section garden.This is practical new The structure of type water lubrication double-screw compressor mainly inlays high rigidity PEEK work in section garden position by the driving of stainless steel male rotor The mother rotor of engineering plastics forms.The utility model is particularly suitable for large-scale water spray helical-lobe compressor (capacity 30m³/ min with On).

Specifically, 1 each tooth form section garden position two sides of stainless steel mother rotor process a spiral groove respectively, and And said spiral slot opening be it is mouthful small to rotor outer surface direction, spiral groove opening be it is big to internal rotor opening, The spiral groove opening direction can fix high rigidity PEEK plastics well.1 tooth form sealed sides high rigidity of stainless steel mother rotor Sealing function, the sealed sides high rigidity PEEK spiral shell are played when compressor runs well in the outer surface 21 of PEEK helical plastic 2 The use for revolving the outer surface 21 of plastics 2 can be such that the back lash between both of the aforesaid rotor reduces, so as to improve screw rod pressure The volumetric efficiency of contracting machine.It is compressing the outer surface 21 of the 1 tooth form sealed sides high rigidity PEEK helical plastic 2 of stainless steel mother rotor Play the role of protecting stainless steel male rotor sealing lateral tooth flank when machine variable working condition and shutdown.The stainless steel male rotor passes through driving The outer surface 31 of 1 tooth form driving side high rigidity PEEK helical plastic 3 of stainless steel mother rotor and move mother rotor 1, and always Power transfer is carried out on the outer surface 31 of high rigidity PEEK helical plastic 3.Therefore, in the water-lubricated compressor of the utility model Male rotor and mother rotor three-dimensional body material are stainless steel, are only sealed in the section garden that stainless steel mother rotor 1 plays the role of band Side increases high rigidity PEEK helical plastic 2 and stainless steel mother rotor 1 plays the role of the section garden driving side increase high rigidity of driving band PEEK helical plastic 3, this structure of aforementioned stainless steel mother rotor 1 have greatly saved the modified engineering of expensive high rigidity PEEK Quantity of plastics.

Compared with prior art, a kind of water lubrication double-screw compressor described in the utility model, mainly in mother rotor Sealed sides and driving side open up spiral groove to add high rigidity PEEK helical plastic and form nonmetallic drive on the line of tooth form section garden Dynamic band and band considerably reduce expensive PEEK engineering plastics dosage, at the same also reduce molding and injection molding difficulty and Cost.It can reduce the material cost of screw rotor using the screw rod mother rotor structure or revolution minor structure of the utility model, The volumetric efficiency for improving screw rod mechanism, especially reduces the manufacturing cost of large-scale water lubrication double-screw compressor, has very much city Field value.

The production method of above structure are as follows:

It as shown in Figure 1, Figure 2 and Figure 3, is the stainless steel mother rotor tomograph for using the utility model in figure, first The stainless steel bar being heat-treated is subjected to roughing, mother rotor parts of tooth is processed, has stayed grinding allowance 30~50；

Secondly, as shown in Figure 4, Figure 5, it is recessed to process spiral shown in earlier figures using the Four-axis milling center with indexing Slot, the spiral groove are located on the section garden of mother rotor, and the advantage that said spiral groove is located at section garden is that male rotor driving is female The driving band of rotor does pure rolling in section garden position two rotor surface, avoids and inlay in spiral groove just in section garden position The abrasion of high rigidity PEEK engineering plastics, improves the service life of rotor；

Again, as shown in Figure 4 and Figure 5, particular groove milling cutter, the opening of 1 spiral groove of stainless steel mother rotor are customized Successively successively decrease from large to small from internal rotor to rotor outer surface direction, the slot opening direction can fix high rigidity well PEEK plastics；

I.e. as shown in Figure 4 and Figure 5, such high-temperature injection into 1 sealed sides high rigidity PEEK spiral of stainless steel mother rotor modeling 21 width of outer surface of material 2 is less than 22 width of inner surface；Same high-temperature injection into 1 driving side high rigidity of stainless steel mother rotor 31 width of outer surface of PEEK helical plastic 3 is less than 32 width of inner surface, the high rigidity PEEK spiral modeling in the spiral groove Material can be combined with stainless steel mother rotor 1 securely.Finally, again the mother rotor fine grinding of PEEK will be inlayed in place with special purpose grinder.

As shown in fig. 6,1 spiral groove of stainless steel mother rotor of the utility model may be sealed sides round screw thread groove 4 and driving side round screw thread groove 5.

As shown in fig. 7,1 spiral groove of stainless steel mother rotor of the utility model may be sealed sides trapezoid spiral groove 6 and driving side trapezoid spiral groove 7.

Particular embodiments described above has carried out into one the purpose of this utility model, technical scheme and beneficial effects Step is described in detail, it should be understood that being not limited to this foregoing is merely specific embodiment of the utility model Utility model, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done should all wrap Containing being within the protection scope of the utility model.

Claims (4)

1. a kind of water lubrication twin-screw compressor screw structure, including male rotor and mother rotor (1), it is characterised in that: the mother Rotor (1) each tooth form section garden position two sides are processed respectively for mother rotor sealed sides high rigidity PEEK helical plastic to be arranged (2) and the spiral groove of mother rotor driving side high rigidity PEEK helical plastic (3), the male rotor and mother rotor driving side are high hard PEEK helical plastic outer surface (31) fitting is spent, so that mother rotor (1) be driven to rotate.

2. a kind of water lubrication twin-screw compressor screw structure as described in claim 1, it is characterised in that: the mother rotor (1) opening of spiral groove is successively successively decreased from large to small from internal rotor to rotor outer surface direction.

3. a kind of water lubrication twin-screw compressor screw structure as claimed in claim 1 or 2, it is characterised in that: the screw rod Compressor male rotor is stainless steel and mother rotor material of main part is stainless steel.

4. a kind of water lubrication twin-screw compressor screw structure as claimed in claim 1 or 2, it is characterised in that: the spiral Groove is tooth form groove, spiral groove or trapezoidal groove.