CN101153596A

CN101153596A - Compound spider piece used for single-screw compressor

Info

Publication number: CN101153596A
Application number: CNA2006101168664A
Authority: CN
Inventors: 李利剑
Original assignee: SHANGHAI KAILI WOPU MECHINE CO Ltd
Current assignee: SHANGHAI KAILI WOPU MECHINE CO Ltd
Priority date: 2006-09-29
Filing date: 2006-09-29
Publication date: 2008-04-02

Abstract

The invention relates to a compound star wheel sheet for single screw compressor, which is characterized in that the compound star wheel sheet comprises an alloy steel core plate in the inner layer (200) and a PEEK carbon fiber polymer (300) in the outer layer. The PEEK carbon fiber polymer (300) is covered on the alloy steel core plate (200) and is combined with the alloy steel core plate (200). The invention has the advantages that the star wheel sheet rigidity, strength and deformation resistance capability resistance are increased, the meshing precision of the star wheel sheet and the life-span of the host are improved, the producing cost is greatly reduced and the benefit is increased.

Description

The compound spider piece that is used for single screw compressor

Technical field

The present invention relates to a kind of single screw compressor, relate in particular to spider piece in this single screw compressor.

Background technique

Single screw compressor is a kind of broad-spectrum fluid machinery, is used for pressurized gas, so as to improving gas pressure.The gas that it is mainly used in chemical industry synthesizes; Catalysis in the petroleum refining, cracking, desulfurization, hydrogenation control; Industrial drilling well, oilfield gas injection recover the oil; Oven gas hydrogen branch in the Iron And Steel Industry; Air-conditioning in the refrigeration industry, freezing, refrigeration; Gas delivery, gas separation; And be used for the aerodynamic force field in a large number, as wind-powered machine, instrument control, car brakeing, spraying, spraying and military weapon system.

Single screw compressor has reliable operation, noise is low, vibration is little, energy-conservation, life-span long, maintenance less and series of advantages such as expense is low, be called " 21 century strategy product " abroad.

By Figure 1A, Figure 1B, Fig. 1 C as seen: single screw compressor mainly by the engagement that casing 4, screw rod 3 and a pair of spider piece 1 are formed pay, bearing enclosure 6, transmission shaft 2, transmission housing 5, coupling 7 etc. form.

As seen from Figure 2: the core of single screw compressor is that the engagement that screw rod 3 and a pair of spider piece 1 are formed is paid.

Single screw compressor mainly relies on the accurate gear motion of screw rod and star-wheel to realize its working procedure, it is the heart of single screw compressor that engagement is paid, because complex geometry is paid in engagement, therefore spider piece is subjected to the effect of heat and power and the control of the resiliently deformable that produces is most important at work, because resiliently deformable causes engagement to pay driving error, can make star-wheel produce additional acceleration-deceleration motion, the star-wheel tooth produces flutter in screw slot, engaging force increases, dynamic pressure oil film is destroyed, and gently then makes engagement pay the wearing and tearing aggravation, and the complete machine friction power loss increases, heavy then cause the star-wheel tooth to fracture compressor failure.Therefore guarantee that spider piece has certain rigid, the transmission accuracy that keeps engagement to pay has important engineering and is worth.

By Fig. 3 A, Fig. 3 B, Fig. 3 C as seen: widely used spider piece is integrated type engineering plastics, nylon phenolic acid resin or expensive poly-fragrant ether ketone PEEK thermoplastic resin 100 in the prior art.

Though these material friction factor are less, but Young's modulus is less, non-deformability is poor, can not keep the machining accuracy of spider piece for a long time, has influenced the engagement life-span of screw rod spider piece.In addition, the PEEK resin at present can only dependence on import, and it costs an arm and a leg, and up to 1,000,000/t, the material cost of every whole spider piece just reaches 1000 yuan-2000 yuan, and because of spider piece weares and teares easily, this has just increased manufacture cost and maintenance expenses greatly.

Summary of the invention

The technical issues that need to address of the present invention have provided a kind of compound spider piece that is used for single screw compressor, are intended to solve above-mentioned defective.

In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:

The present invention includes: internal layer is that alloyed steel central layer, skin are the fine polymer of PEEK carbon; The fine polymer of described PEEK carbon covers on the alloyed steel central layer and is combined with it solidly.

Compared with prior art, the invention has the beneficial effects as follows: increased rigidity, intensity and the non-deformability of spider piece, improved the accuracy of mesh and main frame working life of spider piece; Simultaneously also reduce cost of production significantly, increased benefit.

Description of drawings

Figure 1A is the structural representation of single screw compressor;

Figure 1B be among Figure 1A B-B to view;

Fig. 1 C be among Figure 1A A-A to view;

Fig. 2 is that schematic representation is paid in the engagement that screw rod and a pair of spider piece are formed among Figure 1A;

Fig. 3 A is a star-wheel chip architecture schematic representation in the prior art;

Fig. 3 B be among Fig. 3 A A-A to view;

Fig. 3 C be among Fig. 3 B B-B to view;

Fig. 4 A is a structural representation of the present invention;

Fig. 4 B be among Fig. 4 A A-A to view;

Fig. 4 C be among Fig. 4 B C-C to view;

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

By Fig. 4 A, Fig. 4 B, Fig. 4 C as seen: the present invention includes: internal layer is that alloyed steel central layer 200, skin are the fine polymer 300 of PEEK carbon; The fine polymer 300 of described PEEK carbon covers on the alloyed steel central layer 200 and is combined with it solidly.

The present invention is according to the surface of action of spider piece and screw rod, design and produce a steel core, central layer and heat treatment increase its rigidity, and make corresponding surface of action, at the fine polymer of the outside of central layer mold pressing one deck PEEK carbon, the preheating of central layer palpus makes the solidification point of temperature near the fine polymer of PEEK carbon as far as possible during mold pressing.Qualitative processing is also carried out in the back that make to be shaped, and qualitative temperature generally is equal to or greater than the operating temperature of making, and during qualitative processing, the time of the intensification of stove, insulation, cooling must generally be no less than 16 hours according to the strict process requirement.

Need carry out the test of physical property and mechanical property after making is carried out, main detected parameters is: density, typical degree of crystallinity, thermal expansion coefficient, tensile strength, tension elongation, Rockwell hardness etc.After making sampling Detection, promptly on special purpose machine tool, process surface of action with generating method.

In the middle of the present invention is the alloyed steel central layer, and the fine polymer of outside cladding one deck PEEK carbon is selected certain mould clamping force and injection force, guarantees the density of the fine polymer of PEEK carbon.Because the rigidity of steel core plate is better, not yielding, and bores 11 holes in advance the PEEK resin is injected wherein, guarantee the strong bonded of steel core plate and PEEK, can not misplace after stressed.This structure had both guaranteed rigidity and the intensity and the original machining accuracy of spider piece, had kept the high temperature resistant and wear-resistant self-lubricating characteristic of the fine polymer of PEEK carbon again.

Using the present invention can reduce production costs significantly.Because the used PEEK resin of the present invention has only 1/3rd of whole PEEK spider piece material, saved cost of production widely, as produce the producer of 2,000 single screw compressors per year, select for use compound spider piece just can save nearly 2,000,000 yuan of cost, so of the present invention promoting the use of has a great economic significance.

Claims

1. compound spider piece that is used for single screw compressor is characterized in that comprising: internal layer is that alloyed steel central layer (200), skin are the fine polymer (300) of PEEK carbon; The fine polymer of described PEEK carbon (300) covers alloyed steel central layer (200) and goes up and be combined with it solidly.