CN204941960U - For rotary compressor compressing mechanism and there is its rotary compressor - Google Patents

Abstract

The utility model discloses a compression mechanism for a rotary compressor and a rotary compressor with the same. The compression mechanism comprises: a lower bearing and a crankshaft, the crankshaft has an eccentric part, and the lower end of the eccentric part is formed with The thrust surface against which the upper end surface abuts is provided with an oil groove on the thrust surface and/or the upper end surface, and the oil inlet of the oil groove has the largest width. According to the compression mechanism for rotary compressors of the present invention, an oil groove is provided on the thrust surface and/or the upper end surface of the lower bearing, and the width of the oil inlet of the oil groove is the largest, that is to say, the oil inlet of the oil groove The direction is opposite to the rotation direction of the crankshaft, so that the lubricating oil on the thrust surface of the crankshaft can be increased, and the lubrication of the thrust surface of the rotary compressor can be effectively improved, thereby reducing the power consumption of the rotary compressor and improving the performance of the rotary compressor. work reliability.

Description

Compression mechanism for rotary compressor and rotary compressor having same

technical field

The utility model relates to the field of compressor equipment, in particular to a compression mechanism for a rotary compressor and a rotary compressor with the same.

Background technique

The thrust surface of the crankshaft of the compressor supports the crankshaft, the motor rotor and its assembled balance weight and other components. Poor lubrication of the thrust directly leads to increased power consumption of the compressor, and the condition of the thrust friction pair is even worse, which will lead to power consumption of the compressor. Increase, reliability failure and other issues. The lubricating oil of the thrust method in the related art cannot lubricate the thrust well, and the power consumption of the compressor is large. With the prolongation of the running time, the wear of the thrust part will lead to deterioration of reliability. Therefore, improving the lubricity of the thrust surface is of great significance to improving the energy efficiency and reliability of the compressor.

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 compression mechanism for a rotary compressor, and the compression mechanism has the advantage that the thrust surface of the crankshaft is well lubricated.

The utility model also proposes a rotary compressor with the above-mentioned compression mechanism for the rotary compressor.

A compression mechanism for a rotary compressor according to an embodiment of the present invention includes: a lower bearing; and a crankshaft, the crankshaft has an eccentric portion, and the lower end of the eccentric portion is formed to abut against the upper end surface of the lower bearing The thrust surface, the thrust surface and/or the upper end surface is provided with an oil groove, and the oil inlet of the oil groove has the largest width.

According to the compression mechanism for the rotary compressor of the embodiment of the present invention, an oil groove is provided on the thrust surface and/or the upper end surface of the lower bearing, and the width of the oil inlet of the oil groove is the largest, that is to say, the width of the oil groove The oil inlet direction is opposite to the rotation direction of the crankshaft, so that the lubricating oil on the thrust surface of the crankshaft can be increased, and the lubrication of the thrust surface of the rotary compressor can be effectively improved, thereby reducing the power consumption of the rotary compressor and improving the performance of the rotary compressor. Compressor reliability.

In some embodiments of the present invention, the oil groove includes: a first groove section, one end of the first groove section forms the oil inlet, and the width of the first groove section gradually increases along the oil inlet direction. Reduction; the second slot segment, one end of the second slot segment is connected to the other end of the first slot segment.

Further, the width of the second groove segment is a constant value.

In some embodiments of the present invention, the oil groove extends along the circumferential direction of the crankshaft.

Further, part of the side wall of the crankshaft is configured as a side wall of the oil groove.

In some embodiments of the present utility model, the oil groove is formed on the thrust surface.

Further, a recessed portion is formed at a portion of the crankshaft close to the thrust surface, and the recessed portion extends along the circumferential direction of the crankshaft.

Further, the bottom wall of the recessed portion is flush with the side wall of the oil groove.

In addition, the utility model also proposes a rotary compressor, which includes the above-mentioned compression mechanism for the rotary compressor.

Description of drawings

Fig. 1 is a schematic structural view of a rotary compressor according to an embodiment of the present invention;

Fig. 2 is a perspective view of a crankshaft in a compression mechanism for a rotary compressor according to an embodiment of the present invention;

Fig. 3 is a top view of the thrust surface of the crankshaft in the compression mechanism for the rotary compressor shown in Fig. 2;

Fig. 4 is A-A sectional schematic diagram shown in Fig. 3;

Fig. 5 is a schematic structural view of a double-cylinder rotary compressor according to an embodiment of the present invention;

Fig. 6 is a perspective view of a crankshaft in a compression mechanism for a dual-cylinder rotary compressor according to an embodiment of the present invention;

Fig. 7 is a top view of the thrust surface of the crankshaft in the compression mechanism of the rotary compressor shown in Fig. 6;

Fig. 8 is a schematic cross-sectional view of A-A shown in Fig. 7;

Reference signs:

Rotary compressor 1000;

compression mechanism 100;

Lower bearing 11; upper bearing 12; upper end face 13;

crankshaft 2; eccentric part 21; thrust surface 22;

Oil tank 3; oil inlet 31; first tank section 32; second tank section 33;

Depression 4;

Upper housing 51; Lower housing 52; Main housing 53;

Sliding plate 61; Cylinder 62; Piston 63;

Stator 71; rotor 72.

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.

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 if the first feature is "on" or "under" the second feature 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.

The following describes a compression mechanism 100 for a rotary compressor 1000 according to an embodiment of the present invention with reference to FIGS. 1-8 . It should be noted that the rotary compressor 1000 may include a casing, a compression mechanism 100 and a driving motor, where the driving motor generally includes a stator 71 and a rotor 72 . Wherein, as shown in FIG. 1, the housing may include a main housing 53, an upper housing 51 and a lower housing 52, wherein the main components of the rotary compressor 1000 such as the compression mechanism 100, the driving motor, etc. are arranged on the housing. inside the cavity, thereby facilitating the installation of the rotary compressor 1000. It should be understood that the structure of the housing according to the embodiment of the present invention is not limited thereto, for example, the main housing 53 and the upper housing 51 may be integrally formed, or the main housing 53 and the lower housing 52 may be integral The molded parts can meet the service strength of the rotary compressor 1000 .

As shown in Figures 1-4, the compression mechanism 100 for a rotary compressor 1000 according to an embodiment of the present invention includes: an upper bearing 12, a lower bearing 11, a cylinder 62, a crankshaft 2, a piston 63, and a sliding plate 61 , crankshaft 2, etc. Wherein, the compression mechanism 100 is arranged inside the casing.

Referring to Fig. 2, the crankshaft 2 has an eccentric part 21. Specifically, the rotation of the crankshaft 2 drives the eccentric part 21 to rotate, and then the eccentric part 21 can quickly drive the movement of the piston 63 to compress the refrigerant in the cylinder 62, realizing the transformation of the refrigerant from low pressure to for high pressure process.

Referring to Figures 1-4, the lower end of the eccentric part 21 is formed with a thrust surface 22 that abuts against the upper end surface 13 of the lower bearing 11, and an oil groove is provided on the thrust surface 22 and/or the upper end surface 13 of the lower bearing 11 3. That is to say, the oil groove 3 can be arranged only on the thrust surface 22, or only on the upper end surface 13 of the lower bearing 11, or can be arranged on the thrust surface 22 and the upper end surface 13 of the lower bearing 11 at the same time. Specifically, during the operation of the rotary compressor 1000, due to the high-speed rotation of the eccentric portion 21, a large amount of friction will be generated on the thrust surface 22 at the contact portion between the lower end surface of the eccentric portion 21 and the upper end surface 13 of the lower bearing 11. Therefore, reasonably setting the oil groove 3 on the thrust surface 22 and/or the upper end surface 13 of the lower bearing 11 can increase the lubricating oil entering the thrust surface 22 of the crankshaft 2, reduce the loss caused by friction, and make the thrust surface 22 The lubrication effect of the friction pair is improved, effectively improving the lubrication of the thrust surface 22 of the rotary compressor 1000, thereby reducing the power consumption of the rotary compressor 1000 and improving the working reliability of the rotary compressor 1000.

Referring to Fig. 3, the width of the oil inlet 31 of the oil groove 3 is the largest, specifically, the oil inlet direction of the oil groove 3 is opposite to the direction of rotation of the crankshaft 2, so that the width of the oil inlet 31 of the oil groove 3 is the largest, effectively The amount of oil entering the oil groove 3 is greatly increased, thereby further improving the lubrication effect of the thrust surface 22 of the crankshaft 2, reducing the loss of the thrust surface 22, and improving the working reliability of the rotary compressor 1000.

According to the compression mechanism 100 for the rotary compressor 1000 of the embodiment of the present invention, the oil groove 3 is provided on the thrust surface 22 and/or the upper end surface 13 of the lower bearing 11, and the width of the oil inlet 31 of the oil groove 3 Maximum, thus can increase the lubricating oil entry of the thrust surface 22 of the crankshaft 2, effectively improve the lubrication situation of the thrust surface 22 of the rotary compressor 1000, thereby reducing the power consumption of the rotary compressor 1000, and improving the rotary compressor 1000% working reliability.

In some embodiments of the present invention, as shown in FIG. The width of the groove decreases gradually along the oil inlet direction, and one end of the second groove segment 33 is connected with the other end of the first groove segment 32 . Specifically, the width of the end of the first groove section 32 forming the oil inlet 31 is the largest, thereby facilitating lubricating oil to enter the first groove section 32, and further, the second groove section 33 is connected to the first groove section 32 , lubricating oil can flow from the first groove segment 32 into the second groove segment 33 . In addition, lubricating oil first enters from the oil inlet 31, and gradually fills up the entire thrust surface 22 during the rotation of the eccentric part 21, thereby improving the lubricating effect of the thrust surface 22, and the width of the first groove segment 32 is along the oil inlet direction. Gradual reduction, on the one hand, can improve the utilization rate of lubricating oil, on the other hand, also facilitates the processing of the oil tank 3, and reduces labor intensity.

In some embodiments of the present invention, the width of the second groove section 33 can be fixed, which can facilitate the processing of the second groove section 33 on the one hand, and play a good guiding role on the lubricating oil on the other hand. In some embodiments of the present utility model, referring to Fig. 3, the oil groove 3 can extend along the circumferential direction of the crankshaft 2, so that the lubricating oil in the oil groove 3 can be filled with the thrust surface 22 of the eccentric part 21 of the crankshaft 2, increasing The oil intake amount of lubricating oil can effectively improve the lubricating effect of the thrust surface 22 , reduce the friction loss of the thrust surface 22 , and improve the working reliability and energy efficiency of the rotary compressor 1000 .

Further, part of the side wall of the crankshaft 2 is configured as a side wall of the oil groove 3, as shown in FIG. On the one hand, the processing and slotting of the oil groove 3 can be facilitated; on the other hand, the width of the oil inlet 31 can be maximized, effectively increasing the amount of oil entering the lubricating oil, and improving the lubricating effect of the thrust surface 22.

In some embodiments of the present utility model, as shown in Fig. 2-Fig. 4, the oil groove 3 is formed on the thrust surface 22. In this way, on the one hand, the structure of the lower bearing 11 does not need to be modified, and the lower bearing capacity is reduced. 11 processing steps to improve production efficiency. On the other hand, the integral molding of the oil groove 3 and the crankshaft 2 can facilitate production and processing, and ensure that the oil groove 3 is accurately arranged between the thrust surface 22 and the upper end surface 13 of the lower bearing 11, effectively The lubricating precision of the lubricating oil is improved, thereby effectively improving the lubricating effect, reducing friction loss, and improving the working efficiency of the rotary compressor 1000 .

In some embodiments of the present utility model, as shown in FIG. 4 , a recessed portion 4 is formed near the thrust surface 22 of the crankshaft 2, and the recessed portion 4 extends along the circumferential direction of the crankshaft 2, thereby facilitating the precise positioning of the oil groove 3. processing. Preferably, the bottom wall of the recess 4 is flush with the side wall of the oil groove 3 .

In addition, the utility model also proposes a rotary compressor 1000 , which includes the above-mentioned compression mechanism 100 for the rotary compressor 1000 .

It should be noted that the above-mentioned embodiments of the present invention are all described based on the rotary compressor 1000 with a single cylinder 62. In practical applications, the rotary compressor 1000 can also be multi-cylinder 62, such as double cylinders 62 rotary compressor 1000, as shown in Figures 5-8, the compression mechanism 100 of the double-cylinder 62 rotary compressor 1000 is composed of two cylinders 62, and the crankshafts 2 located in the two cylinders 62 are respectively provided with eccentric parts 21 That is to say, two eccentric parts 21 are arranged on the crankshaft 2 according to the positions of the two cylinders 62, and an oil groove 3 is arranged on the thrust surface 22 of each eccentric part 21, and the width of the oil inlet 31 of the oil groove 3 is the largest That is to say, the oil inlet direction of the oil groove 3 is opposite to the rotation direction of the crankshaft 2, thereby increasing the lubricating oil entering the thrust surface 22 of the crankshaft 2, effectively improving the lubrication situation of the thrust surface 22 of the rotary compressor 1000, and then The power consumption of the rotary compressor 1000 can be reduced, and the working reliability of the rotary compressor 1000 can be improved.

In the description of this specification, descriptions referring 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 (9)

1. for a compressing mechanism for rotary compressor, it is characterized in that, comprising:

Lower bearing; And

Bent axle, described bent axle has eccentric part, and the lower end of described eccentric part is formed with the thrust surface only supported with the upper-end surface of described lower bearing, and described thrust surface and/or described upper-end surface are provided with oil groove, and the width of the filler opening of described oil groove is maximum.

2. the compressing mechanism for rotary compressor according to claim 1, is characterized in that, described oil groove comprises:

First groove section, one end of described first groove section forms described filler opening, and the width of described first groove section reduces gradually along oil-feed direction;

Second groove section, one end of described second groove section is connected with the other end of described first groove section.

3. the compressing mechanism for rotary compressor according to claim 2, is characterized in that, the width of described second groove section is definite value.

4. the compressing mechanism for rotary compressor according to claim 1, is characterized in that, described oil groove extends along the circumferential direction of described bent axle.

5. the compressing mechanism for rotary compressor according to claim 4, is characterized in that, the partial sidewall of described bent axle is configured to a sidewall of described oil groove.

6. the compressing mechanism for rotary compressor according to any one of claim 1-5, is characterized in that, described oil groove is formed on described thrust surface.

7. the compressing mechanism for rotary compressor according to claim 6, is characterized in that, the position of the close described thrust surface of described bent axle is formed with depressed part, and described depressed part extends along the circumferential direction of described bent axle.

8. the compressing mechanism for rotary compressor according to claim 7, is characterized in that, the diapire of described depressed part is concordant with the sidewall of described oil groove.

9. a rotary compressor, is characterized in that, comprises the compressing mechanism for rotary compressor according to any one of claim 1-8.