CN2761877Y - Scroll compressor axial seal structure - Google Patents

Abstract

An axial sealing structure of scroll compressor is composed of casing, scroll assembly and floating part. The shell comprises a first shell and a second shell. An accommodating chamber is formed in the first shell, and a separator is arranged in the accommodating chamber. In addition, the scroll component is composed of a static scroll and a dynamic scroll, a compression chamber is formed between the two scroll pieces, the static scroll is arranged in the first shell, a bulge part is arranged on the back surface of the static scroll, and a vent hole communicated with the compression chamber is arranged on the bulge part. A floating piece is arranged between the separating piece and the static scroll, the floating piece is provided with a communication hole and a concave part, the communication hole is arranged corresponding to the vent hole of the static scroll, the concave part is correspondingly matched with the convex part, a sealing component is arranged between the concave part and the convex part, and a back pressure chamber is formed; therefore, the assembly procedure can be simplified, the assembly easiness can be increased, the product quality can be improved, and the cost can be reduced.

Description

Scroll compressor axial seal structure

technical field

The utility model provides an axial sealing structure of a scroll compressor, in particular relates to a scroll compressor shaft which can simplify the assembly procedure of the scroll compressor and increase the ease of assembly, improve product quality and reduce assembly cost. To the sealing structure.

Background technique

The scroll compressor is mainly composed of two scroll-type scroll parts, one of which is fixed, called the fixed scroll, and the other scroll is corresponding to the fixed scroll for orbital motion , called Orbiting Scroll. The vortex blades of the two scroll parts mesh with each other to make the working fluid enter the compression chamber from its suction port, and then through the continuous rotation of the movable scroll, the working fluid is compressed and pushed, and then spit out from the vent hole of the static scroll. Thus, the compression stroke of the working fluid is completed. Because the volume of the working fluid decreases and the pressure increases during the compression stroke, axial air pressure, radial air pressure and tangential air pressure are generated between the two scroll members, wherein the axial air pressure will make the two scroll members Separation along the axial direction, while the radial air pressure and tangential air pressure will produce an overturning moment. In addition, the pressure difference between the compression chambers will cause the working fluid to leak from the end surfaces of the two scrolls or the side surfaces of the vanes, thereby reducing the volumetric efficiency of the compressor. In addition, when encountering abnormal high pressure (such as liquid compression) or foreign matter entering the compression chamber, the scroll blade will be deformed or the wall surface will be scratched; in addition, another reason that affects the service life and sealing effect of the compressor is that The assembly structure among the various components, so how to improve the volumetric efficiency of the compressor, reduce the damage of scroll parts and the assembly structure has become an important subject to be studied by those skilled in the art.

The well-known scroll compressor axial sealing structure, such as U.S. Patent Publication No. Re.35216, is mainly provided with an annular groove (Cavity) on the back of the static scroll, and an annular floating member is arranged in the groove. The component has at least two lip-shaped sealing rings, and each sealing ring abuts against the inner and outer walls of the groove respectively, and uses the scroll assembly to guide the working fluid and generate back pressure, so that the static scroll is close to the On the movable scroll, the effect of axial sealing is achieved.

However, the known axial sealing structure of the scroll compressor still has the following defects: when the floating member is installed downward into the groove of the fixed scroll, the sealing rings located inside and outside the floating member will The end is turned up following the installation of the floating part, so that the sealing ring abutting against the outer wall of the groove loses its blocking effect due to the reverse setting. In view of the defects in the above-mentioned prior art, in order to improve the assembly speed and ease of assembly, and meet the requirements of on-site assembly, those skilled in the art are provided with additional special tools, and first press the floating part into the tapered hole of the jig After shrinking and deforming the end of the sealing ring, put the floating part into the groove of the static scroll, so that the end of the sealing ring is closely attached to the wall of the groove of the static scroll, and then remove the tool from the groove. Due to the structural shape of the static scroll and the floating part, the assembly process is quite cumbersome and complicated, which greatly increases the assembly man-hours and makes it impossible to effectively improve the manufacturing cost.

In view of this, this design artificially improves and solves the defects in the above-mentioned prior art. After painstaking research and the application of theories, a utility model with reasonable design and effective improvement of the above-mentioned defects is finally proposed.

Contents of the utility model

One purpose of this utility model is to provide a scroll compressor axial sealing structure, which is to arrange the sealing assembly on the floating part and the static scroll in a forward direction, which can simplify the assembly procedure and increase the ease of assembly, greatly Improve product quality and reduce assembly costs.

Another object of the present utility model is to provide a scroll compressor axial sealing structure, which is that the floating part is arranged between the separator and the back of the static scroll, and a back is formed between the static scroll and the floating part. The pressure chamber is used to push the fixed scroll and the movable scroll to be in close contact, so as to improve the volumetric efficiency of the compressor.

Another object of the present utility model is to provide a scroll compressor axial sealing structure, which uses the setting of floating parts. When the liquid is compressed or foreign matter enters the compression chamber, the static scroll can produce axial retreat, thereby reducing The damage probability of the scroll assembly is reduced, and the end face of the floating part is equipped with automatic wear compensation, thereby greatly improving the reliability of the compressor.

In order to achieve the above purpose, the utility model provides an axial sealing structure of a scroll compressor, including:

A casing, including a first casing and a second casing, an accommodating chamber is formed inside the first casing, and a partition is provided in the accommodating chamber to separate the fluid inside the casing into High pressure area and low pressure area;

A scroll assembly is composed of a static scroll and a movable scroll below it, a compression chamber is formed between the two scroll parts, the static scroll is arranged in the first casing, and a a protruding portion opening with a vent hole communicating with the compression chamber; and

A floating part is arranged between the partition part and the static scroll, and the floating part is provided with a communication hole and a recessed part, the communication hole is arranged corresponding to the air hole of the static scroll, and the recessed part is connected with the static scroll The protruding part of the roll is matched accordingly, and a sealing assembly and a back pressure chamber are formed between the fixed scroll and the floating part, so as to achieve the above purpose.

The scroll compressor axial sealing structure of the utility model can simplify the assembly procedure and increase the ease of assembly, greatly improve the product quality and reduce the assembly cost; improve the volumetric efficiency of the compressor; reduce the friction loss between the two scrolls, so that The service life of the compressor is greatly improved.

Brief description of the drawings

Fig. 1 is the combined sectional view of the first embodiment of the utility model;

Fig. 2 is a partially enlarged view of part A in Fig. 1;

Fig. 3 is the use status diagram of the first embodiment of the utility model;

Fig. 4 is a combined sectional view of the second embodiment of the present invention.

In the accompanying drawings, the list of parts represented by each label is as follows:

10-shell

11-First shell 12-Second shell

13-Accommodating chamber 14-Separator

141-opening 15-high pressure zone

16-Low pressure zone 17-Exhaust port

18-drive shaft

20-Scroll assembly

21-static scroll 211-, 221-blade

22-moving scroll 23-bulge

24-vent hole 25-through hole

26-compression chamber 27-shaft hole

30-floating piece

31-First Ring 32-Second Ring

33-recessed part 34-communicating hole

35-Cylinder 36-Abutting part

37-Seal assembly 38-Back pressure chamber

Detailed ways

In order for those skilled in the art to further understand the features and technical contents of the present utility model, please refer to the following detailed description and accompanying drawings of the present utility model. The accompanying drawings are provided for reference and illustration only, and are not intended to limit the present utility model.

FIG. 1 and FIG. 2 are a combined cross-sectional view of the first embodiment of the present invention and a partial enlarged view of part A in FIG. 1, respectively. As shown in Figure 1 and Figure 2, the utility model provides a scroll compressor axial sealing structure, including a housing 10, a scroll assembly 20 and a floating member 30, wherein:

The housing 10 includes a first housing 11 and a second housing 12, each of which has a hollow cavity, and the first housing 11 and the second housing can be connected by bolts or other fixed components or by welding. 12 phase connections. An accommodating chamber 13 is formed inside the first casing 11 , and a partition 14 is disposed inside the accommodating chamber 13 for dividing the fluid inside the casing 10 into a high-pressure area 15 and a low-pressure area 16 . The partition 14 can be a circular flat plate, and a circular opening 141 is defined in the center of the flat plate; in addition, an exhaust port 17 is connected to one end of the accommodating chamber 13 . A working fluid inlet (not shown) is provided on the periphery of the second housing 12, and components such as a plurality of compressor assemblies, transmission mechanisms and motors are installed inside it, wherein a transmission shaft 18 is arranged at the center of the motor, Since the components and mechanisms are the same as those of the known technology, they will not be repeated here.

The scroll assembly 20 is disposed inside the casing 10 and consists of a fixed scroll 21 and a movable scroll 22 . The bottom of the static scroll 21 is provided with a spiral blade 211 , and the top is provided with a circular protrusion 23 . One or more vent holes 24 are provided at the center of the protruding portion 23, and the vent holes 24 are stepped circular holes that are large at the top and small at the bottom. Through holes 25 are respectively opened at an appropriate distance. A scroll blade 221 is also arranged above the movable scroll 22 , and the blade 221 is matched with the blade 211 of the fixed scroll 21 , and a plurality of compression chambers 26 are formed between the two blades 211 , 221 . A shaft hole 27 is provided below the movable scroll 22, and a bearing and an eccentric bushing are arranged inside the shaft hole 27, and the bushing is used for the transmission shaft 18 of the motor to pass through and connect.

The floating member 30 is arranged between the separator 14 of the first casing 11 and the fixed scroll 21 of the scroll assembly 20, and its bottom is composed of a first ring 31 and a second ring 32, and the interval between the rings is A concave portion 33 is formed at the position, and the concave portion 33 can be provided by the convex portion 23 of the fixed scroll 21 . A communication hole 34 is opened in the center of the first ring 31 , and the communication hole 34 is respectively arranged corresponding to the ventilation hole 24 of the protruding portion 23 and the opening 141 of the partition member 14 . A cylindrical body 35 protrudes from the top surface of the first circular ring 31 of the floating member 30 . The cylindrical body 35 can be inserted into the opening 141 of the partition 14 and fits with the inner edge of the opening 141 . An annular abutting portion 36 is disposed around the outer periphery of the barrel body 35 , and the abutting portion 36 can be attached to the bottom surface of the separator 14 .

Two sealing assemblies 37 are arranged between the protruding portion 23 of the fixed scroll 21 and the concave portion 33 of the floating member 30, and the sealing assemblies 37 can be lip seals, O-rings, or U-shaped seals. Ring (U-shaped section), mechanical seal (Mechanical Seal) or other forms of sealing components, this embodiment is a lip. One end of one of the sealing components 37 is fixed on the end face of the second circular ring 32, and is locked and fixed with components such as a fixing ring and screws, and the other end abuts against the outer periphery of the protruding portion 23 of the fixed scroll 21; the other sealing One end of the component 37 is fixed on the periphery of the vent hole 24 of the protruding portion 23, and is locked and fixed by components such as a fixing ring and screws, and the other end abuts against the outer periphery of the first ring 31. Therefore, a back pressure chamber 38 is formed around the recessed part 33, the protruding part 23 and the sealing assembly 37. The back pressure chamber 38 can communicate with the compression chamber 26 through the through hole 25 of the protruding part 23, and introduce medium-pressure work. fluid, thereby forming a form of a medium pressure back pressure chamber.

When assembling, the lip-shaped sealing assembly 37 is respectively fixed on the end faces of the second ring 32 and the periphery of the vent hole 24, and then the floating member 30 is directly inserted from top to bottom and connected with the static scroll 21. Because the ends of the sealing assembly 37 fixed on the second ring 32 and the periphery of the vent hole 24 are all set towards the inside, so that when the floating member 30 is moved and loaded, the ends of the sealing assembly 37 can be pushed away together, thereby generating a corresponding upward movement. As in the downward deformation, the deformation direction is exactly the same as the installation direction of the sealing assembly 37, thereby increasing the ease of assembly and simplifying the assembly procedure, and also omitting the design and operation of known fixtures, thereby greatly improving product quality and reduce assembly costs.

Fig. 3 is a diagram of the usage state of the first embodiment of the utility model. As shown in Figure 3, through the combination of the above components, when the movable scroll 22 is driven by the drive shaft 17 to rotate, the low-pressure working fluid is sucked from the inlet of the second casing 12 and enters the vanes of the fixed scroll 21 211 and the blades 221 of the movable scroll 22, in the compression chamber 26, with the orbital movement of the movable scroll 22, the working fluid will gradually move from the outer edge of the scroll assembly 20 to the central part, and its volume will gradually decrease. The pressure rises from a low pressure state to a medium pressure state, and the medium pressure fluid will enter the back pressure chamber 38 from the through hole 25 of the protrusion 23, thereby pushing the floating member 30 to move upward, and causing the static scroll 21 to generate downward pressure. The movement of the moving scroll closely fits with the movable scroll 22, so as to achieve the sealing effect.

Fig. 4 is a combined sectional view of the second embodiment of the present invention. As shown in Figure 4, a partition 14 extends inside the accommodation chamber 13 of the first casing 11. The partition 14 in this embodiment is a cylindrical column with a circular opening 141 in the center of the cylindrical column. 141 communicates with the exhaust port 17 of the first casing 11, and its inner diameter matches with the outer diameter of the cylinder body 35 of the floating member 30, and makes the bottom end surface of the cylindrical column and the abutting part of the floating member 30 36 correspond to fit each other.

The axial sealing structure of the scroll compressor of the utility model has the following advantages: the sealing assembly of the utility model is arranged on the floating member and the static scroll in a forward direction, which can simplify the assembly procedure and increase the ease of assembly, thereby greatly improving Product quality and lower assembly costs. In addition, the floating part is arranged between the separator and the back of the fixed scroll, and a back pressure chamber is formed between the fixed scroll and the floating part, so as to push the fixed scroll and the moving scroll to be closely bonded, thereby improving the performance of the compressor. volumetric efficiency. In addition, the medium-pressure working fluid is introduced into the back pressure chamber, and the working fluid is forced to push the back of the static scroll, so that the static scroll moves downward in the axial direction, so as to overcome the pressure exerted by the compression chamber on the static scroll during operation. The axial air pressure and overturning moment can reduce the friction loss between the two scrolls, so that the service life of the compressor is greatly improved.

To sum up, the scroll compressor axial sealing structure of the present utility model has practicality, novelty and creativity, and the structure of the utility model has never been seen in similar products and has been publicly used, and has not been published in any The publications fully meet the requirements for utility model patent applications.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the patent scope of the present utility model. All equivalent structural transformations made by using the description of the utility model and the contents of the accompanying drawings, or directly or indirectly used in other related Technical fields are all included in the patent scope of the present utility model in the same way.

Claims (10)

1. a scroll compressor axial seal structure is characterized in that, comprising:

One housing includes one first housing and one second housing, and described first enclosure interior is formed with a putting chamber, is provided with a divider in described putting chamber;

One scrollwork assembly is made up of a quiet scrollwork and a moving scrollwork, is formed with pressing chamber between described two scroll members, and described quiet scrollwork is arranged in described first housing, is provided with bump at its back side, and described bump offers the vent that communicates with pressing chamber; And

One buoyant member, be arranged between described divider and the quiet scrollwork, described buoyant member offers intercommunicating pore and reentrant part, the corresponding setting of vent of described intercommunicating pore and quiet scrollwork bump, cooperate and the female portion is corresponding with the bump of quiet scrollwork, and between described quiet scrollwork and buoyant member, be provided with black box and be formed with back pressure chamber.

2. scroll compressor axial seal structure according to claim 1, the divider that it is characterized in that described putting chamber is a flat board, described flat board is provided with an opening, the corresponding setting of intercommunicating pore of described opening and buoyant member.

3. scroll compressor axial seal structure according to claim 1, the divider that it is characterized in that described putting chamber is a flat board, described flat board is provided with an opening, and the intercommunicating pore end face of buoyant member is extended with a cylindrical shell, described cylindrical shell is corresponding with opening to be cooperated.

4. as scroll compressor axial seal structure as described in claim 2 or 3, it is characterized in that the intercommunicating pore outer peripheral edge of described buoyant member is provided with abutting part, the bottom surface of described abutting part and divider fits.

5. scroll compressor axial seal structure according to claim 1, the divider that it is characterized in that described putting chamber is from the extended cylindrical column of first housing, and described cylindrical column has an opening, the corresponding setting of intercommunicating pore of described opening and buoyant member.

6. scroll compressor axial seal structure according to claim 1, the divider that it is characterized in that described putting chamber is from the extended cylindrical column of first housing, described cylindrical column has an opening, and the intercommunicating pore end face of buoyant member is extended with a cylindrical shell, and described cylindrical shell is corresponding with opening to be cooperated.

7. as scroll compressor axial seal structure as described in claim 5 or 6, it is characterized in that the intercommunicating pore outer peripheral edge of described buoyant member is provided with abutting part, the end face of described abutting part and divider fits.

8. scroll compressor axial seal structure according to claim 1 is characterized in that formed back pressure chamber is to press back pressure chamber in one between described quiet scrollwork and the buoyant member.

9. scroll compressor axial seal structure according to claim 1, the inside and outside edge of reentrant part that it is characterized in that described buoyant member is formed with one first annulus and one second annulus respectively, the end face of described second annulus is fixed with a black box, and the other end of described black box is connected to the bump outer periphery of quiet scrollwork; And around the vent of quiet scrollwork, being fixed with another black box, the other end of described black box is connected to the outer periphery of first annulus.

10. scroll compressor axial seal structure according to claim 1 is characterized in that described black box is any of lip sheet, O shape ring, U-shaped seal ring or mechanical shaft seal.

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