CN205036583U - Rotary compressor - Google Patents

Abstract

The utility model discloses a rotary compressor. A rotary compression mechanism part and a motor are accommodated in a sealed casing composed of a cylindrical casing and an end plate for sealing the opening end. The motor includes a stator and a rotor, and the compression mechanism The part includes: a cylinder assembly, the cylinder assembly includes at least one cylinder, each cylinder has a compression chamber and a piston eccentrically rotatably arranged in the compression chamber, and each cylinder has a sliding plate. The first sealing plate and the second sealing plate are arranged on both sides of the cylinder assembly, the center of the first sealing plate has a first protrusion, and the center of the second sealing plate has a second protrusion; driven by the rotor to drive the piston eccentrically The crankshaft; the outer circumference of the compression mechanism part is connected to the inner circumference of the cylindrical shell, and the first protrusion is supported by a corresponding end plate. According to the rotary compressor of the present invention, the fixed rigidity of the compression mechanism part can be increased, the rotation speed of the rotor and the crankshaft can be increased, and the noise caused by the vibration of the end plate can be reduced.

Description

rotary compressor

technical field

The utility model relates to the field of compressors, in particular to a rotary compressor.

Background technique

Rotary compressors, which are widely used as the main parts of air conditioners, aim to improve the APF (seasonal operation efficiency) by reducing the volume of the compression chamber while improving the heating and air-conditioning capacity, and use inverter motors to operate at high speeds of 150rps or 200rps. focus on. In order to achieve high-speed operation, it is necessary to improve the fixing strength of the compression mechanism and improve the bearing performance of the crankshaft.

Utility model content

The utility model aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the utility model proposes a rotary compressor, which enlarges the fixed rigidity of the compression mechanism part.

According to the rotary compressor of the present invention, a rotary compression mechanism and an electric motor are accommodated in a sealed casing composed of a cylindrical casing and an end plate that seals its open end, and the electric motor includes a stator and a rotor. The compression mechanism part includes: a cylinder assembly, the cylinder assembly includes at least one cylinder, each of the cylinders has a compression chamber and a piston eccentrically rotatably arranged in the compression chamber, and each of the cylinders has a sliding plate; On the first sealing plate and the second sealing plate on both sides of the cylinder assembly, the center of the first sealing plate has a first protrusion, and the center of the second sealing plate has a second protrusion; a crankshaft driven to eccentrically drive the piston; the outer circumference of the compression mechanism part is connected to the inner circumference of the cylindrical case, and the first protrusion is supported by a corresponding one of the end plates.

According to the rotary compressor of the present invention, since the outer circumference of the compression mechanism part is connected to the cylindrical case, and the first protrusion is supported by one of the end plates, the fixing rigidity of the compression mechanism part can be increased, and the rotor and the rotor can be improved. The rotation speed of the crankshaft reduces the noise caused by the vibration of the end plate.

In some embodiments of the present utility model, the first protrusion is welded and fixed on the corresponding end plate; or the first protrusion is along the first The axial direction of the protrusion is supported by sliding fit.

In some embodiments of the present invention, the crankshaft includes a secondary shaft that is slidably engaged with the first protrusion and a main shaft that is slidably engaged with the second protrusion.

In some embodiments of the present utility model, the cylinder assembly includes two cylinders and a middle partition, and the middle partition is arranged between the two cylinders and cooperates with the two cylinders.

In some specific embodiments of the present utility model, the crankshaft includes an eccentric shaft that respectively drives the two pistons, an intermediate shaft connected to the two eccentric shafts, and a main shaft, and the intermediate shaft and the intermediate shaft The first rolling bearing provided in the plate slides, and the main shaft is slidingly engaged with the second rolling bearing provided in the second protrusion.

In some specific embodiments of the present utility model, the crankshaft includes an eccentric shaft that respectively drives the two pistons, a main shaft and a secondary shaft connected to the two eccentric shafts, and the secondary shaft is connected to the second 1. The first rolling bearing provided on the protrusion is in sliding fit, and the main shaft is in sliding fit with the second rolling bearing provided in the second protrusion, or the main shaft is in sliding fit with the second rolling bearing and the second rolling bearing provided in the second protrusion. 3 rolling bearings for sliding fit.

In some embodiments of the present invention, the oil supply passage provided inside the first protrusion communicates with the oil supply passage provided inside the crankshaft.

Description of drawings

Fig. 1 is related to embodiment 1 of the present utility model, shows the longitudinal sectional view of the internal structure of twin-cylinder rotary compressor;

Fig. 2 is related to this embodiment 1, shows the detailed diagram of compression mechanism part;

Fig. 3 is related to this embodiment 1, shows the figure that improves the fixed strength of compression mechanism part;

Fig. 4 is related to this embodiment 1, the application case to the horizontal rotary compressor;

Fig. 5 is related to this embodiment 1, the application case to the single-cylinder rotary compressor;

Fig. 6 is related to embodiment 2 of the present utility model, shows the longitudinal sectional view of the internal structure of the double-cylinder rotary compressor;

Fig. 7 is related to this embodiment 2, shows the detailed diagram of compression mechanism part;

Fig. 8 is related to this embodiment 3, shows the longitudinal sectional view of the inner structure of the twin-cylinder rotary compressor;

Fig. 9 is a vertical cross-sectional view showing the internal structure of a two-cylinder rotary compressor related to Embodiment 4 of the present invention.

Reference signs:

Two-cylinder rotary compressor 1, shell 2, cylindrical shell 2a, first end plate 2b, second end plate 2c, oil storage chamber 8,

Compression mechanism part 5, first seal plate 40, flange 42, first protrusion 41, cylindrical hole 41a, oil hole 41c, oil supply chamber 41b, second seal plate 45, second protrusion 46, first cylinder 11. Second cylinder 21, intermediate partition 50, piston 61 (62), first compression chamber 11a, second compression chamber 21a, crankshaft 30, main shaft 35, counter shaft 36, intermediate shaft 33, first eccentric shaft 31 , the second eccentric shaft 32, thrust plate 37, oil supply hole 37a, shaft center hole 36a, spiral plate 36b,

Motor 4, stator 4a, rotor 4b,

The first suction pipe 12, the second suction pipe 22, the muffler 40b, the muffler 45b, the first rolling bearing 15, the second rolling bearing 16, the third rolling bearing 17, the oil suction pipe 38, and the bracket 55.

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" The orientation or positional relationship indicated by , "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying the referred device Or elements must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrated; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components , unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

The rotary compressor according to the embodiment of the present utility model will be described in detail below with reference to FIGS. machine.

According to the rotary compressor of the embodiment of the present invention, the sealed casing 2 composed of the cylindrical casing 2a and the end plate that seals its open end accommodates the rotary compression mechanism part 5 and the electric motor 4, that is to say, The rotary compressor includes a casing 2 , a rotary compression mechanism 5 , and an electric motor 4 . The compression mechanism part 5 and the motor 4 are provided in the casing 2, and the casing 2 includes a cylindrical casing 2a and two end plates (namely, a first end plate 2b and a second end plate 2c described below). Both ends of the cylindrical case 2a are opened to form an open end, and two end plates respectively seal the two open ends of the cylindrical case 2a.

The motor 4 includes a stator 4 a and a rotor 4 b, and the stator 4 a may be fixed on the inner peripheral wall of the housing 2 . The compression mechanism unit 5 includes a cylinder assembly, a first seal plate 40 and a second seal plate 45 provided on both sides of the cylinder assembly, and a crankshaft 30 .

The cylinder assembly includes at least one cylinder, each cylinder has a compression chamber and a piston eccentrically rotatably arranged in the compression chamber, and each cylinder has a sliding plate. It can be understood that when the rotary compressor is a single-cylinder rotary compressor, the cylinder assembly includes one cylinder. When the rotary compressor is a double-cylinder rotary compressor, the cylinder assembly includes two cylinders and a middle partition 50, and the middle partition 50 is arranged between the two cylinders and cooperates with the two cylinders.

The first sealing plate 40 has a first protrusion 41 at its center, and the second sealing plate 45 has a second protrusion 46 at its center. The first sealing plate 40 and the second sealing plate 45 are provided on both sides of the cylinder assembly, and both the first sealing plate 40 and the second sealing plate 45 have flanges provided on the cylinder.

The crankshaft 30 is driven by the rotor 4b to eccentrically drive the pistons.

The outer periphery of the compression mechanism part 5 is connected to the inner periphery of the cylindrical case 2a, and the first protrusion part 41 is supported by the corresponding one end plate. Among them, at least one of the cylinder, the first sealing plate 40 and the second sealing plate 45 may be fixed to the inner peripheral wall of the cylindrical case 2a. The first protrusion 41 is supported by a corresponding one of the end plates. Therefore, the figure formed along the ridge line connecting the outer periphery of the compression mechanism part 5 with the housing 2 and the connection between the first protrusion 41 and the end plate is an inverted cone.

According to the rotary compressor of the embodiment of the present invention, the outer circumference of the compression mechanism part 5 is connected to the cylindrical shell 2a, and the first protrusion 41 is supported by one of the end plates, so the fixing rigidity of the compression mechanism part 5 can be enlarged. , so that the rotation speed of the rotor 4b and the crankshaft 30 can be increased, and the noise caused by the vibration of the end plate can be reduced.

In a specific embodiment of the present utility model, the first protrusion 41 is welded and fixed on the corresponding end plate; Slip fit support. That is to say, the first protrusion 41 can be supported by the end plate in the following manner, for example, as shown in Figures 1-8, the first protrusion 41 can be welded on the first end plate 2b, or as shown in Figure 9, A bracket 55 is disposed on the first end plate 2b, and the first protruding portion 41 protrudes into the bracket 55 and is slidably engaged with the bracket 55 .

In some specific embodiments of the present invention, the crankshaft 30 includes a secondary shaft 36 that is slidably engaged with the first protrusion 41 and a main shaft 35 that is slidably engaged with the second protrusion 46 .

In some embodiments of the present invention, as shown in FIG. 7 , the crankshaft 30 includes an eccentric shaft that drives two pistons respectively, an intermediate shaft 33 connected to the two eccentric shafts, a main shaft 35, and the intermediate shaft 33 and the middle partition The first rolling bearing 15 equipped in 50 slides, and the main shaft 35 is slidingly fitted with the second rolling bearing 16 equipped in the second protrusion 46 . Wherein the crankshaft 30 may not be provided with a secondary shaft.

In some embodiments of the present utility model, the crankshaft 30 includes an eccentric shaft that drives two pistons respectively, a main shaft 35 and a secondary shaft 36 connected to the two eccentric shafts, the secondary shaft 36 and the first protruding part 41 are equipped with The first rolling bearing 15 is slidably fitted, the main shaft 35 is slidably fitted with the second rolling bearing 16 equipped in the second protruding portion 46 , or the main shaft 35 is slidably fitted with the second rolling bearing 16 and the third rolling bearing 17 equipped in the second protruding portion 46 .

According to some embodiments of the present invention, the oil supply passage provided inside the first protrusion 41 communicates with the oil supply passage provided inside the crankshaft 30 . Thereby, oil can be supplied stably to the crankshaft 30 .

Rotary compressors according to several specific embodiments of the present utility model will be described in detail below with reference to FIGS. 1-9 .

Example 1:

FIG. 1 shows a cross-section of a two-cylinder rotary compressor 1 , and FIG. 2 shows details of a compression mechanism unit 5 . The outer periphery of the stator 4 a of the electric motor 4 and the outer periphery of the second seal plate 45 provided in the compression mechanism unit 5 are fixed to the inner periphery of the housing 2 . The casing 2 is composed of a cylindrical casing 2a, a first end plate 2b and a second end plate 2c welded to the lower end and the upper end thereof. However, the cylindrical case 2a and the first end plate 2b may be an integrated deep-drawn case. In addition, the lubricating oil enclosed in the oil storage chamber 8 formed at the bottom of the housing 2 is not shown in the figure. Normally, oil is sealed up to the height of the intermediate partition plate 50 .

In the rotary compression mechanism part 5, it is provided with: the first air cylinder 11 and the second air cylinder 21, the piston 61 and the piston 62 accommodated in these two air cylinders, and the slide plate (not shown) which reciprocates synchronously with the rotation of these pistons. ), the first sealing plate 40 and the second sealing plate 45 connected to the opening surfaces of the first compression chamber 11a and the second compression chamber 21a provided in the first cylinder 11 and the second cylinder 21, and the middle sealing plate 45 connected to the above two cylinders The separator 50 and the crankshaft 30 are slidably engaged with the first seal plate 40 and the second seal plate 45 .

The crankshaft 30 includes a main shaft 35 , a counter shaft 36 , and a first eccentric shaft 31 and a second eccentric shaft 32 that drive the two pistons to operate eccentrically. A rotor 4 b constituting the motor 4 is fixed to a main shaft 35 . In addition, the first suction pipe 12 and the second suction pipe 22 are connected to each of the two cylinders. The first sealing plate 40 and the second sealing plate 45 are provided with a muffler 40b and a muffler 45b, respectively.

Fig. 2 omits the identification of the muffler 45b and the muffler 40b. The outer periphery of the second seal plate 45 is fixed to the inner periphery of the cylindrical case 2a by six-point spot welding between the inner peripheries of the cylindrical case 2a. On the other hand, the first sealing plate 40 is composed of a flange 42 connected to the first cylinder 11 and a first protrusion 41 formed integrally at the center. The lower end surface of the first protrusion 41 is fixed to the central portion of the first end plate 2b by spot welding. Moreover, the arc welding 7 of the 1st protrusion part 41 is performed from the outer side of the 1st end plate 2b after welding the 1st end plate 2b to the outer periphery of the cylindrical case 2a.

The first protrusion 41 in the oil storage chamber 8 is provided with a cylindrical hole 41a as a bearing for sliding engagement with the subshaft 36, and an oil supply chamber 41b having four oil holes 41c. The thrust plate 37 fixed in the cylindrical hole 41 a acts as a thrust to support the rotational load of the crankshaft 30 . In addition, at the center of the thrust plate 37, there is an oil supply hole 37a.

As the crankshaft 30 rotates, the oil in the oil reservoir 8 flows toward the outer periphery of the crankshaft 30 from the shaft center hole 36a opened to the lower end of the countershaft 36 through the oil hole 41c, the oil supply chamber 41b, and the oil supply hole 37a. And oil is distributed from the crankshaft 30 to each sliding part. In addition, the screw plate 36b pressed into the shaft bore 36a increases the effect of the oil pump.

Especially in the rotary compressor installed in the air conditioner, due to the high-speed rotation of the rotor and the discharge of a large amount of high-pressure gas from the two compression chambers, the oil level in the oil storage chamber is greatly disturbed, and a large number of refrigerant bubbles are generated in the oil. As a result, the oil level will be violently disturbed. This phenomenon occurs under unstable conditions such as high-speed operation of the compressor, after startup, or during defrosting operation.

However, in the oil, the oil supply chamber 41b provided in the inside of the first protrusion 41 is isolated from the above-mentioned turbulent flow and air bubbles, so it is not affected by the above-mentioned phenomenon, and it can be carried out into the shaft center hole 36a. Stable necessary oil supply. This is the effect that the oil supply passage formed inside the first protrusion 41 communicates with the oil supply passage of the crankshaft 30 .

In this way, the utility model constitutes the first protrusion 41 in the first sealing plate 40, and its bottom surface and the first end plate 2b improve the fixing rigidity of the housing 2 and the compression mechanism part 5 through arc welding 7, and the first The protruding portion 41 serves as a bearing for the crankshaft 30 and has the characteristic of having an oil supply introduction passage.

FIG. 3 illustrates the principle of improving the fixing rigidity of the casing 2 and the compression mechanism part 5 related to the above-mentioned first protrusion 41 . The ridge line connecting the outer periphery of the second sealing plate 45 welded and fixed along the inner periphery of the housing 2 to the welding point of the first protrusion 41 has an inverted conical shape.

That is, with respect to the conventional method in which only the outer periphery of the compression mechanism part is fixed to the housing, by adding the fixation of the first protrusion 41 at the apex of the reverse conical shape, the rotation axis of the rotor 4b and the crankshaft 30 and the swinging direction at right angles , the fixing rigidity of the compression mechanism part 5 is greatly enlarged.

This increase in fixing rigidity can increase the rotational speeds of the rotor 4 b and the crankshaft 30 . Since the first end plate 2b is coupled with the first protrusion 41, a mass effect is obtained, so that the conventional problem of noise due to the vibration of the first end plate 2b can be reduced.

In order to increase the welding strength between the first protrusion 41 and the first end plate 2b, the number of arc welding may be increased. In addition, if the material of the first protrusion 41 is not a casting, laser welding can be used to improve welding strength and welding accuracy. As one of these means, different materials may be used for the flange 42 of the first sealing plate 40 and the first protrusion 41 .

The technology disclosed in Embodiment 1 is not limited to the vertical two-cylinder rotary compressor, but can also be applied to the horizontal type shown in FIG. 4 or the vertical single-cylinder rotary compressor shown in FIG. 5 . In addition, the internal pressure of the casing 2 may be a high pressure type or a low pressure type. These application examples are also the same in Embodiments 2 to 4 disclosed below.

Example 2:

In embodiment 2 and the following embodiment 3, the rigidity effect of the inverted conical fixing of the compression mechanism part 5 obtained in embodiment 1 is applied to the high-speed operation of the rotary compressor, and rolling bearings are used.

In Embodiment 2 shown in FIG. 6 , the main differences from Embodiment 1 are: (1) The middle partition 50 is fixed on the inner periphery of the casing 2 . (2) The first rolling bearing 15 and the second rolling bearing 16 are respectively provided on the second protrusion 46 provided at the center of the middle partition plate 50 and the second seal plate 45 . (3) The auxiliary shaft 36 is eliminated, and the oil suction pipe 38 is connected to the shaft center hole 36 a opened on the lower end surface of the first eccentric shaft 31 . In addition, the thrust surface of the crankshaft 30 in the second embodiment is the lower end surface of any eccentric shaft.

FIG. 7 is a detailed view of the compression mechanism unit 5 . As described above, the outer diameter of the first rolling bearing 15 is press-fitted or shrink-fitted into the central hole of the intermediate partition plate 50 fixed to the inner periphery of the housing 2 . In addition, the second rolling bearing 16 is fixed to the upper side of the second protrusion 46 provided at the center of the second seal plate 45 . The suction pipe 28 connected to the middle partition 50 is divided into two compression chambers.

In addition, in order to arrange the first rolling bearing 15 in the middle partition plate 50, the first eccentric shaft 31 should be separated and combined. After fixing the first rolling bearing 15 in the center hole of the middle partition plate 50, the shaft end of the crankshaft 30 is passed through the above-mentioned rolling bearing. Afterwards, the shaft end of the crankshaft 30 is connected with the first eccentric shaft 31.

The intermediate shaft 33 connecting the two eccentric shafts is in sliding fit with the first rolling bearing 15 , and the main shaft 35 is in sliding fit with the second rolling bearing 16 . There is a gap of about 0.1 to 0.5 mm between the main shaft 35 and the inner diameter of the second protrusion 46 . This gap can be used as an oil supply passage to the second rolling bearing 16 .

The tip of the oil suction pipe 38 that rotates in the first protrusion 41 has an oil suction hole. The oil sucked from the oil suction pipe 38 passes through the shaft center hole 36a to lubricate the above two rolling bearings and the first eccentric shaft 31 and the second eccentric shaft. 32. The first piston 61 and the second piston 62 running eccentrically. These oil supply methods can be the same as before. In addition, compared with the sliding bearing used in Example 1, the rolling bearing can perform sliding fit without abnormality with a small amount of oil, and has the characteristic of being resistant to insufficient oil supply for a short time.

After the compressor is started, both the first cylinder 11 and the second cylinder 21 suck low-pressure gas from the suction pipe 28 and discharge high-pressure gas to the inside of the casing 2 . The compressive load on the intermediate shaft 33 due to this compressive action is mainly due to the sliding fit of the first rolling bearing 15, and the second rolling bearing 16 plays an auxiliary role.

At the same time, the centrifugal load on the main shaft 35 due to the rotation of the rotor 4 b is mainly supported by sliding fit through the second rolling bearing 16 , and the first rolling bearing 15 plays an auxiliary role. That is to say, in the second embodiment, due to the effect of the fixed rigidity of the compression mechanism part 5 and the synergistic effect of the optimized arrangement of the two rolling bearings, the compression load during high-speed operation and the centrifugal load of the rotor 4b can be slidably supported reliably.

In addition, in the second embodiment, the fixed positions of the casing 2 and the compression mechanism part 5 are not only the second sealing plate 45 and the intermediate partition plate 50 of the first embodiment, or the second cylinder 21 and the first cylinder 11 whose outer circumferences are rounded. also can.

Example 3:

In FIG. 8, the auxiliary shaft 36 is slidingly fitted with the first rolling bearing 15 fixed in the inner diameter of the first protrusion 41, and the main shaft 35 is respectively fixed with the second rolling bearing 16 on the lower side and upper side of the inner diameter of the second protrusion 46. Slidingly fit with the third rolling bearing 17. Therefore, the crankshaft 30 is in sliding fit with the three rolling bearings.

In terms of the functions of the bearings, the compression load generated by the first cylinder 11 and the second cylinder 21 is mainly slidably supported by the first rolling bearing 15 and the second rolling bearing 16, and the third rolling bearing 17 plays an auxiliary role. At the same time, the centrifugal load on the main shaft 35 due to the rotation of the rotor 4 b is mainly slidably fitted by the third rolling bearing 17 and assisted by the second rolling bearing 16 . As a result, the same bearing effect as in Example 2 can be achieved.

In addition, in an application with a low rotational speed or an application with a small operating load, the second rolling bearing 16 or the third rolling bearing 17 may be omitted, and the arrangement thereof may be optimized in the inner diameter of the second protrusion 46 .

Example 4:

Embodiment 4 is a solution to the pressure deformation of the first end plate 2b. In FIG. 9 , during operation of the compressor, the internal pressure of the housing 2 may sometimes reach 4 MPa or more, for example. Due to the influence of the thickness and shape of the first end plate 2b, the above-mentioned pressure will cause a small deformation of the central part of the first end plate 2b to the outside. In order to prevent the deformation from propagating to the first protrusion 41 and the flange 42 constituting the first sealing plate 40 , a bracket 55 is added.

The first protruding portion 41 is supported by the bracket 55 connected to the first end plate 2b and is slidably fitted in the vertical direction. There is a gap (C) of about 0.5 to 2 mm inside the bracket 55 and the lower end surface of the first protrusion 41, so even if the first end plate 2b moves up and down due to the internal pressure change of the housing 2, it will not be transmitted to the first end plate 2b. In the protrusion 41 .

Since the first protrusion 41 is normally supported by the bracket 55, there is no change in the fixing rigidity of the compression mechanism 5 against the centrifugal load due to the high-speed operation of the rotor 4b and the crankshaft 30. The bracket 55 may be a stamped sheet metal part with an oil hole 41c at the bottom. If necessary, additional machining or molding of the inner diameter of the bracket 55 is required. In addition, laser welding can be selected for the first end plate 2b and the bracket 55 .

In addition, in the assembly process of the housing 2 and the compression mechanism part 5, in order to ensure the concentricity of the first protrusion 41 and the bracket 55, it is necessary to insert the bracket 55 into the first protrusion 41 in advance and insert it at the first end plate 2b. Weld on the bracket 55. In addition, in order to maintain the gap (C) before and after assembly, it is necessary to add a leaf spring to the portion of the gap (C).

The double-cylinder rotary compressor of the utility model can be mounted on an air conditioner, a refrigeration device, a water heater, a vehicle-mounted refrigerator or an air conditioner, and the like. In addition, it can also be used in a horizontal two-cylinder rotary compressor.

As can be seen from the above analysis, a problem to be solved by the utility model is:

In order to operate a compact rotary compressor at high speed, it is necessary to improve the rigidity of the compression mechanism and the performance of the bearing of the crankshaft that fixes the motor rotor.

A specific means adopted in the utility model to solve the above-mentioned problems is:

The outer periphery of the second seal plate 45 of the compression mechanism unit 5 is fixed to the inner periphery of the casing 2 by arc welding ( 7 ) at six locations. On the other hand, the first protrusion 41 provided at the center of the first sealing plate 40 is fixed to the first end plate 2b by arc welding (7) on the bottom surface thereof. The ridge line connecting these upper and lower welding points is in the shape of an inverted cone, the fixing strength of the housing 2 and the compression mechanism part 5 is improved, and it meets the necessary conditions for high-speed operation.

The beneficial effects that adopt above-mentioned specific means to bring for the utility model are:

(1) The rotary compressor can be operated at a high speed by improving the fixed rigidity of the compression mechanism. In addition, due to the synergistic effect of this improvement in fixing rigidity and the adoption of ball bearings, high-speed operation of, for example, 200 rps or higher is possible. As a result, APF (seasonal efficiency) can be improved by increasing the heating and air conditioning capacity and reducing the volume of the compression chamber.

(2) Based on the application design based on the previous design, the utility model is easy to import.

(3) Including horizontal and low-pressure rotary compressors, single-cylinder to double-cylinder rotary compressors can be applied.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature through an intermediary indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary, and should not be construed as limitations of the present invention, and those of ordinary skill in the art are within the scope of the present invention. Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (7)

1. a rotary compressor, is characterized in that, received revolving compression mechanical part and motor in the housing of the sealing be made up of with the end plate of its opening end of sealing circular cylindrical shell, described motor comprises stators and rotators, and described compression mechanical part comprises:

Cylinder assembly, described cylinder assembly comprises at least one cylinder, and each described cylinder has compression chamber and the eccentric piston be located at rotationally in described compression chamber, and each described cylinder has slide plate;

Be located at the 1st sealing plate and the 2nd sealing plate of described cylinder assembly both sides, described 1st sealing plate central authorities there is the 1st jut, described 2nd sealing plate central authorities there is the 2nd jut;

Driven by described rotor with the bent axle described piston being carried out to eccentric drive;

The periphery of described compression mechanical part is connected with the inner circumferential of described circular cylindrical shell, and described 1st jut is supported by a corresponding described end plate.

2. rotary compressor according to claim 1, is characterized in that, described 1st jut is weldingly fixed on corresponding described end plate; Or the support that described 1st jut is possessed by corresponding described end plate carries out along the axis of described 1st jut the support that is slidably matched.

3. rotary compressor according to claim 1, is characterized in that, described bent axle comprises the countershaft be slidably matched with described 1st jut and the main shaft be slidably matched with described 2nd jut.

4. rotary compressor according to claim 1, is characterized in that, described cylinder assembly comprises 2 cylinders and central diaphragm, and described central diaphragm to be located between described 2 cylinders and to coordinate with described 2 cylinders.

5. rotary compressor according to claim 4, it is characterized in that, described bent axle comprises the torque-transmitting axle driving 2 described pistons respectively, the jack shaft, the main shaft that are connected with 2 described eccentric shafts, and the 1st rolling bearing be equipped with in described jack shaft and described central diaphragm carries out sliding, the 2nd rolling bearing that is equipped with in described main shaft and described 2nd jut is slidably matched.

6. rotary compressor according to claim 4, it is characterized in that, described bent axle comprises the torque-transmitting axle driving 2 described pistons respectively, the main shaft be connected with 2 described torque-transmitting axles and countershaft, the 1st rolling bearing that described countershaft and described 1st jut are equipped with is slidably matched, and the 2nd rolling bearing that described main shaft and described 2nd jut are equipped with is slidably matched or the 2nd rolling bearing that is equipped with in described main shaft and described 2nd jut and the 3rd rolling bearing are slidably matched.

7. rotary compressor according to claim 1, is characterized in that, the oil supply gallery that the inside of described 1st jut possesses is communicated with the oil supply gallery that described bent axle inside possesses.