JPH08338379A - Scroll chip seal of scroll fluid machine - Google Patents

Abstract

PURPOSE: To squeeze a chip seal to an opposing scroll end plate surface sufficinetly, by providing a pressure fluid leading-in groove at the deep part of a chip seal groove, and composing a pressure fluid leading-in port to the side surface of a scroll tooth, in the structure to insert the chip seal in order to prevent a flow-by from the scroll tooth contact surface of a scroll fluid machine. CONSTITUTION: A pressure fluid leading-in groove 4 is provided along a chip seal groove 3' at its deep part, a pressure fluid leading-in port 5 is composed near the central discharge port of a scroll, and a chip seal is squeezed to an opposing scroll end plate surface, by the pressure fluid entered from the leading-in port.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll tip seal for a scroll fluid machine in which a pressure fluid introduction groove is formed in a tip seal groove for inserting a scroll tip seal.

[0002]

2. Description of the Related Art In a conventional scroll tooth tip seal structure, a scroll-like tip seal is slightly fixed to the scroll tooth surface so as to be fixed, and the tip seal is brought into contact with a corresponding end plate surface. Then, a method of preventing blow-by was constructed, but in this method, the tip seal was integrated with the scroll teeth, and leakage occurred without conforming to the state of the corresponding surface. As a method different from this, in order to improve the contact property of the scroll chip seal, an elastic cushioning material is attached to the back surface of the self-lubricating chip seal. However, this method is extremely expensive, and accidents such as peeling of the cushioning material occur.

[0003]

Although the structure of the conventional scroll tip seal has the above-mentioned problems built-in, it is necessary to use an elastic cushioning material as a backing and to swing it closely to the corresponding scroll end plate. However, considering a high-cost structure and a low-cost structure that exceeds reliability, and how to solve the blow-by of the fluid, which is a drawback of the solid-integrated type, with a simple structure, it is a subject to be solved.

[0004]

Means for Solving the Problems In the means for solving the above problems according to the present invention, the groove for inserting the tip seal along the vortex of the scroll tooth is constructed in the conventional manner. Further, a means for forming a pressure fluid introduction port along the tip seal groove and forming a pressure fluid introduction port on the side surface of the scroll tooth near the discharge port of the scroll compression mechanism is adopted.

[0005]

First, the tip seal is inserted into the tip seal groove of the scroll tooth provided with the pressure fluid introduction groove and the introduction port. The tip seals are loosely fitted so that the tip seals are freely adapted to the contact surface of the corresponding scroll end plate. When the assembly operation is started with this configuration, the fluid sucked from the outside of the scroll vortex is compressed toward the center, and the compressed fluid is discharged from the discharge port at the center scroll end edge. At this time, the pressure fluid introduction port provided on the side surface of the scroll tooth near the discharge port becomes the discharge pressure, the discharge pressure is introduced from this pressure fluid introduction port, and this pressure fluid flows into the pressure fluid introduction groove, The tip seal is pressed against the entire back surface of the tip seal, and the tip seal is pressed against the corresponding scroll mirror plate contact surface and rocks while contacting, preventing leakage from between the chip seal surface and the scroll mirror plate contact surface. .

[0006]

Embodiments of the present invention will be described with reference to FIGS. Reference numeral 1 denotes a spiral scroll tooth, which is attached to the corresponding scroll end plate 2 so as to contact and swing. A tip seal 3 is loosely fitted in the scroll tooth surface and the tip seal groove 3 '. Reference numeral 4 is a pressure fluid introduction groove, which is formed on the back surface of the tip seal of the above-mentioned 3. Reference numeral 5 denotes a fluid introduction port, which is provided on the side of the scroll tooth near the central portion discharge port and the vortex of the scroll tooth.

The inflow fluid sucked from the outer periphery of the scroll is compressed by the meshing oscillation of the fixed scroll and the orbiting scroll of the scroll having the above-described structure, and the compressed pressure fluid is swirled by one scroll tooth, and the compressed fluid of the central portion It is discharged to the discharge port. At this time, the discharge fluid becomes a compressed pressure fluid, and the pressure fluid is introduced from the fluid introduction port 5 and enters the pressure fluid introduction groove 4 to pressurize the entire back surface of the tip seal 3 Press the chip seal against the scroll end plate 2 evenly. In this state, the scroll tooth 1 swings,
Although it is compressed, since the three-chip seal is pressed against the scroll end plate 2, no blow-through occurs during the compression process, and efficient compression is performed.

[0008]

EFFECTS OF THE INVENTION By providing a pressure fluid introduction groove for injecting a pressurized fluid on the back surface of the tip seal, the pressurized fluid is introduced into the introduction groove and the tip seal is pressed against the corresponding scroll end plate. Since the blow-by is eliminated and the volumetric efficiency is improved, the total adiabatic efficiency of the fluid machine is improved and the required power per unit flow rate is also reduced.

[Brief description of drawings]

[Figure 1] Three-dimensional view of scroll and tip seal installation

[Fig. 2] Cross-sectional view of scroll tooth tip seal installation

FIG. 3 is a cross-sectional view of scroll teeth

[Explanation of symbols]

1 ... Scroll teeth 2 ... Scroll end plate
3 ... Tip seal 4 ... Pressure fluid inlet groove 5 ... Pressure fluid inlet
3 '... Chip seal groove

Claims (1)

[Claims] 1. In a rotating or fixed scroll, a scroll-shaped tip seal is inserted into a tip seal groove of a scroll tooth surface which is in contact with a corresponding scroll end plate, and a scroll-shaped tip seal is inserted into a deep portion of the insert groove of the tip seal. A scroll of a scroll fluid machine, characterized in that a pressure fluid introduction groove is formed along the tip seal groove, and the pressure fluid introduction groove is provided with a pressure fluid introduction port on the side surface of the scroll tooth near the discharge port of the scroll. Tip seal structure.