JPS603493A - Screw compressor - Google Patents

Abstract

PURPOSE:To increase a clearance setting range to aim at enhancing and stabilizing the productivity and the sealing ability, by disposing a seal plate between a rear side plate and both male and female rotors, contactably and separatably to and from the rear side end faces of both rotors. CONSTITUTION:A seal plate 19 is disposed between a male rotor 7 and a female rotor 8 such that the seal plate 3 may longitudinally reciprocate along a drive shaft 11 and a driven shaft 12 through a through-hole 19a to contact to and separate from the rear side end faces of both rotors 7, 8. During compressing operation discharged gas which has passed through a discharge port in the seal plate 19 flows into a clearance G2 formed between the seal plate 19 and the rear side plate 3. Therefore the seal plate 19 moves toward the rear side end faces 7a, 8b of both rotors 7, 8. As a result a first clearance G1 between both rotors 7, 8 and the seal plate 19 is made small so that the strength of an oil film therebetween is increased, thereby the sealing ability and the sliding ability are enhanced.

Description

Detailed Description of the Invention [Technical Field] The present invention relates to a male rotor having a convex helically cut tooth profile and a female rotor having a concave helically cut tooth profile that are engaged with each other in a housing. The screen is designed to perform compression while avoiding rotation of the reconnaissance pole.

Prior Art Conventional screw 0 [1ii
The sealing performance is ensured by making the clearance formed between the female rotor glue 17 side end facing At-1 nod plate as small as possible.

This clearance was set at around 20 microliters, but this clearance management was extremely difficult and became an obstacle to improving production. Also, since the clearance changes due to thermal deformation, if the clearance increases, the sealing performance will decrease, and conversely, if the clearance increases by a small amount of 4 cm, a burnout will occur and the pressure will increase.
There was a defect in that the 1+ii number was locked.

OBJECT OF THE INVENTION The present invention 1 has been made in order to eliminate the above-mentioned conventional defects, and [1] the present invention 1 is a male stator and a female female 1.
-Tatori' (7 lead plays between 1 and iii*
By interposing the rotor glue 1) in contact with the side end surface to the seal plate 1, it is possible to increase the setting width of the 7 lances and improve productivity. In order to stabilize the seal 11, the screw cover should be removed (the number of screws should be the same).

EXAMPLE Below, an example embodying the present invention is shown in FIG. 1 and FIG. A housing 4 (17) is fixed to the beam (71) through night plates 1 to 3 (1'f, 'r).Inside the center housing 1 are cylindrical housings. Valley spaces 5 and 6 are formed parallel to the front-rear direction and slightly overlapped in the left-hand direction.One accommodation space 5 has a Δ slow tough hole cut in a convex helical shape. A female rotor 8 is accommodated in the housing space 6 of the other rotor, which has concave helical-cut teeth 1. like]
[-''N1~Housing2 and A7''Idbrae i
-C (negative (47 times: Ii7: liJ
1 drive shaft 11, which is supported by an IR (all 1.-1 fixed, and the other female rotor 8 is fixed in the same way).
．． + by radial needle bearing 10 times Ql/
; The degree is fixed on the driven i1'llll 12 supported by the 'l' function.

A shirt 1-sealing machine 41G I J is installed in the shaft hole 2a.
1f'F are installed, and a sealing chamber S is formed.

Further, blinds ζ, 114 are provided at both ends of the shaft hole 2+1, forming a front bear link 1fiF. moreover,
The driving shaft 11 and the driven shaft 12) 7 side are each fitted with a bolt 1 (
J to 'I', tighten A (J is fixed, and the rear end surface of the above-mentioned 1 antride play 1 to 3 has the above-mentioned slus I to heno' link 1.
The cover 17 that covers 5 is joined and fixed to form a sun hair link chamber.

On the other hand, in the upper part of the center housing 1 on the side facing the fluorocarbon 1, as shown in FIGS. A suction port 1a communicating with an external circuit is formed on the upper side of the suction chamber '18 and faces the meshing portion of the A-throttle and female rotor 81, it.13.1) The front housing 2 includes the suction chamber 18 and the seal seedling S.
and the front bearing '+M F are provided with an oil filler port (not shown) that communicates with each other.
Ll 1!7. 3 Said male rotor 7 and female rotor 8 glue) 7 side end 7a
, 8a and the above-mentioned A71J-side brake 1 to 3 side end face 3C, a predetermined gap is provided as shown in FIG. As shown in Fig. 5, the seal plates 1 and 19, each having a through hole 'IOa through which the drive shaft 11 and driven shaft '12 of the Δ slow tough and female 1. '11 and a driven shaft 12 to enable reciprocating movement in the front-rear direction. The outer circumferential edge of the seal plate 1/'19 is approximately 8 in diameter so as to come as close to and cover the inner circumferential surfaces of the accommodation spaces 5 and 6 as possible.
The discharge bow 191) is formed in the shape of a square, and a cutout is formed in the central part of the discharge bow 1.

Above ＼11 Night brake 1 to 3 A7 housing 1
The discharge chamber 20 formed by It communicates with the compression chamber 22 formed by, specifically, the I7'1i'1 chamber 22 of 1111 after the compression process. The cover 17 has a discharge valve 2 (, 1 corresponding to the 111 outlet 21).
3 and Resono 271 are fixed. In the discharge chamber 20, a filter 25 for ff1li for 1A is provided, and a discharge port 26 is provided in the relay housing 4.

By the way, the discharge bows 1 to 1 of the seal play 1-19
9b is () (2 leads 1 note J3σ Month 11 []2
The refrigerant gas Ij, 81+1 is guided from the DI Ni1i chamber 22 through the discharge port 21. In this embodiment, the seal plate 19 is Front surface and rear width measurement of both rotors 7.8: surface 7a.

8a is called the first clearance G1, and the gap formed between the seal plate 1-19 glue 17 and the reed brake 1 and 3 between the freon 1 and surface 3c is called the second clearance 02. Tsuru.

Next, the operation of the screw compaction machine constructed as described above will be explained.

Now, when the drive ii'i 41''l (not shown) is rotated in one direction as shown in FIG. The inhaled gas flows through the tooth gap of the male rotor 7 and the accommodation space 5.
The child is taken into the space formed by the recess of the female rotor 8 and the inner peripheral surface of the housing space 6, and then the child is taken into the space formed by the inner peripheral surface of the housing space 5.
, 6 at the boundary d3 and are compressed and moved toward the rear side in FIG. 1. Then, at the end of the compression stroke, d
3, and is pumped from the compression chamber 22 to the discharge chamber 20 via the discharge ports 1 to 191) of the seal plates 1 to 19 and the discharge port 21. 1 During the compression operation, the odor (discharge force that has passed through the Tagawa boat 19b of the seal plays 1-19 flows into the second clearance G2 formed between the seal plays 1-19 and the rear side play 1-3, As a result, reseal plays 1 to 19 are moved to both L routers 7 and 8, side \'il!
The first clearance G1 formed between seal plates 1 to 19 becomes smaller and the oil film becomes stronger.
Sealing performance and sliding performance (11 improved).

Incidentally, in this embodiment, a protrusion P was formed on the discharge ball l-1911 of one seal plate in accordance with the end face shape of the constriction plate 7.8 as shown in FIG.
The rotational force is transmitted to the front part 1 and the protrusion P.

There is a possibility that it may get caught between the two rotors 7 and 8. 1.
), and in order to improve the sliding properties of the end surface of the rotor 7.8, the A quality of the seal plate 19 may be made of steel such as SK or J of fluorinated ethylene or fluorinated ethylene and a vinyl compound. (Using a resin made of a polymer, coating the surface of the seal plates 1 to 19 made of SK forceps I etc. with the copolymer J: It is desirable that the thickness of the L seal plate 1 be less than a predetermined thickness.The present invention can also be specifically implemented in the following embodiments.

(1) As shown in Fig. 6, the discharge bows 1 to 19b of the seal plates 1 to 19 are made into two holes to eliminate the protrusion 1], and the rotation of the rotor 7.8 To prevent I7.

(2) As shown in FIG. 7, the ports 1 to 19L for the seal plate 1 to 1, the discharge ports 1 to 19L for the seal plate 1 to 1, and the ports 1 to 19L for the release of the sea urchin seal plate 1 to 19B are separated and provided transparently, and Lead the gas from 19c to 2nd clearance G2 J
, to cover the sea urchin. In this case, seal play 1 to 19
The force pushing η toward both rotors 7 and 8 increases, and the compression chamber 22
gas leakage from the through hole 19a of the seal plate '19 toward the suction side via the second clearance G2 and the gas leakage from the through hole 19a of the seal plate '19 to the radial needle bearings 9, 10 side, further improving sealing performance.1. I can do that.

(3) As shown in Figure 8, J-like (2 lead play-1-3
A passage 27 is formed in the separator part 1 (1 oil A 1 which oil pressure is applied to the seal plays 1 to 19 and A7 lead oil play 1
~ 33 into the second clearance G2 <,
”, to do something. In this case, seal play 1 to 19
By increasing the pressure applied to the end faces of both rotors 7 and 8, the seal 1 can be made more convex by 1 convex J-L.
Re-seal play 1~19' for leaking oil! i
Ll) H"1"1 It is possible to improve the lubricity.

Effects of the Invention As detailed above, the present invention increases the setting range of the clearance compared to the conventional bandai, which sets a fixed lance between the side end face of the rotor and the retainer plate 1. In addition to improving productivity, it also has the effect of ensuring stable sealing performance even when thermal deformation and re-reliance change, and preventing burnout accidents on the rotor end face.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of the central part showing an embodiment embodying the present invention, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Fig. 3 is a cross-sectional view taken along line B-B in Fig. 1. [1) i-side view, Figure 4 is C-C in Figure 2
Line...I side view, Figure 5 is the front view of Seal Play 1 only,
6 and 7 are front views of other examples of the seal plate 1 to 1, and FIG. 8 is a sectional view showing another example of the present invention. υ~7 Zide play 1~3, male I-tough, female rotor 8, seal play 1~19, discharge ball l~191). 19b', first (second) clearance G1 (G2) special
1. ′[Applicant Yutaka Co., Ltd.
Person Patent Attorney ra [J:l H.7 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] 1. A male rotor with a convex helically cut tooth pattern on the right and a female rotor with a concave helical tooth pattern on the right inside the housing (in mesh with each other) , By actively slowing down the rotation of both eyes, a 41+1 screw compression m is formed so that the compression action can be performed separately.
In the gap between the rear side end surface of the cylinder]-ri and the rear side plate 1~, the rotor glue r' It is particularly noted that, with the plate interposed, a discharge port was formed on the seal plate (upward A7) and a corresponding C discharge port 1 was formed in the J-id brake 1. 2. The screw compressor according to claim 1, in which two discharge ports 1 are transparently provided in the seal brake. (The screw compressor according to claim 1 is characterized in that ports 1 to 1 for over-niving imbrication relief are transparent F+Q independently of the discharge boat.) 4. separator molecule fl
Transfer the hydraulic pressure such as ll itl+ to seal plate 1 A
7. The screw compression according to claim 1, in which an Oj passage (for introduction into which clearance of the 7-Leight plate) is formed.