CN112797002A

CN112797002A - Pump body assembly and fluid machine

Info

Publication number: CN112797002A
Application number: CN202011590386.8A
Authority: CN
Inventors: 李直; 张培林; 杜忠诚; 宋雪威; 于瑞波; 任丽萍
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-05-14

Abstract

The invention provides a pump body assembly and a fluid machine. The pump body component comprises a rotating shaft; the piston, the piston has the sliding hole, and at least a part of pivot is worn to establish in the sliding hole, and the piston is along with pivot pivoted in-process, sliding hole wall and the pivot sliding fit of sliding hole, and the pivot is located and is provided with pivot circulation passageway on the shaft part in the sliding hole, and the pivot circulation passageway extends along the slip direction of piston. The pump body assembly solves the problem that a rotating shaft of a rotary cylinder compressor in the prior art obstructs oil liquid circulation in a piston in the use process.

Description

Pump body assembly and fluid machine

Technical Field

The invention relates to the technical field related to a rotary cylinder compressor, in particular to a pump body assembly and a fluid machine.

Background

Taking a rotary cylinder compressor as an example, the rotary cylinder compressor is a novel positive displacement compressor. The cylinder and the rotating shaft rotate around respective centers, and the piston reciprocates simultaneously relative to the cylinder and the rotating shaft. The piston realizes the periodical enlargement and reduction of the volume cavity relative to the reciprocating motion of the cylinder; the cylinder moves circularly relative to the cylinder sleeve, so that the volume cavity is communicated with the air suction channel and the exhaust channel respectively; the above two composite movements realize the processes of air suction, compression and air exhaust of the compressor.

With the increasing requirements on the high efficiency and energy conservation of the compressor, the structure of the rotary cylinder compressor needs to be optimally designed, so that the efficiency of the compressor is further improved, and energy conservation and emission reduction are realized. At present, in the operation process of a rotary cylinder compressor, when a rotating shaft of a pump body assembly slides relative to a piston, at least one part of area of the rotating shaft obstructs the flow of oil, so that the oil obstructs the movement of the piston and the rotating shaft, and the power consumption of the pump body assembly is increased.

Therefore, the problem that the rotating shaft blocks oil liquid in the piston to circulate exists in the existing rotary cylinder compressor in the using process.

Disclosure of Invention

The invention mainly aims to provide a pump body assembly and a fluid machine, and aims to solve the problem that a rotating shaft of a rotary cylinder compressor in the prior art obstructs oil liquid circulation in a piston in the use process.

In order to achieve the above object, according to one aspect of the present invention, there is provided a pump body assembly including: a rotating shaft; the piston, the piston has the sliding hole, and at least a part of pivot is worn to establish in the sliding hole, and the piston is along with pivot pivoted in-process, sliding hole wall and the pivot sliding fit of sliding hole, and the pivot is located and is provided with pivot circulation passageway on the shaft part in the sliding hole, and the pivot circulation passageway extends along the slip direction of piston.

Furthermore, the rotating shaft circulation channels are multiple and are arranged at intervals along the axial direction of the rotating shaft.

Furthermore, the number of the rotating shaft flow channels is less than 4.

Furthermore, the sliding hole is provided with a group of sliding hole walls which are oppositely arranged, the shaft section of the rotating shaft in the sliding hole is provided with a sliding matching surface matched with the sliding hole walls, and the rotating shaft circulation channel is a rotating shaft circulation channel and is arranged on the sliding matching surface.

Further, the sliding fit surface is a plane.

Further, the width t1 of the rotating shaft flow groove accounts for 5% -20% of the diameter R1 of the shaft section of the rotating shaft in the sliding hole.

Furthermore, the depth h1 of the rotating shaft flow groove accounts for 5% -20% of the diameter R1 of the shaft section of the rotating shaft in the sliding hole.

Furthermore, the sliding hole is provided with a group of sliding hole walls which are oppositely arranged, the shaft section of the rotating shaft in the sliding hole is provided with a sliding matching surface matched with the sliding hole walls, the shaft section of the rotating shaft in the sliding hole is also provided with a group of connecting surfaces which are opposite to each other and used for connecting the two sliding matching surfaces, the rotating shaft circulation channel is a rotating shaft circulation hole, and the rotating shaft circulation hole is communicated with the two connecting surfaces.

Further, the sliding matching surfaces are plane surfaces, so that the distance L1 between the two sliding matching surfaces is 2mm larger than the diameter of the rotating shaft flow hole.

Furthermore, the diameter of the rotating shaft flow hole is more than or equal to 1 mm.

Furthermore, the rotating shaft comprises a long shaft section and a short shaft section which are connected in sequence, the length of the long shaft section is larger than that of the short shaft section, a sliding matching surface is arranged on the long shaft section, and at least one part of the long shaft section extends into the sliding hole.

Further, the diameter of the shaft section is larger than the diameter of the short shaft section.

Further, a cylinder liner; the cylinder is rotatably arranged in the cylinder sleeve, and a piston hole is formed in the cylinder along the radial direction of the cylinder; the piston is arranged in the piston hole in a sliding mode, the rotating shaft penetrates through the piston and drives the piston to reciprocate along the extending direction of the piston hole, and the air cylinder rotates to drive the piston to rotate.

According to another aspect of the present invention, there is provided a fluid machine including a pump body assembly.

According to the technical scheme, the pump body assembly comprises a rotating shaft and a piston, the piston is provided with a sliding hole, at least one part of the rotating shaft penetrates through the sliding hole, in the process that the piston rotates along with the rotating shaft, the sliding hole wall of the sliding hole is in sliding fit with the rotating shaft, a rotating shaft circulation channel is arranged on a shaft section of the rotating shaft, which is located in the sliding hole, and the rotating shaft circulation channel extends along the sliding direction of the piston.

From the above description, it can be seen that, in the above embodiments of the present invention, the flow passage is provided on the shaft section of the rotating shaft located inside the sliding hole of the piston, so as to increase the smoothness of oil flow and reduce the power consumption of the pump assembly. At present, when a rotating shaft of a pump body assembly slides relative to a piston in the operation process of a rotary cylinder compressor, the area of the rotating shaft, which is positioned inside the piston, blocks the flow of oil, so that the oil blocks the movement of the piston and the rotating shaft, and the power consumption of the pump body assembly is increased.

Specifically, the rotating shaft penetrates through a sliding hole in the piston to divide the interior of the piston into two cavities, the piston moves back and forth relative to the rotating shaft in the movement process of the pump body assembly, the two cavities increase periodically and decrease to press oil, and oil is extruded by a shaft section of the rotating shaft located in the sliding hole of the piston to transfer the oil in the two cavities. Through set up pivot circulation passageway on the shaft part that the pivot is located the inside of sliding hole, reduce the pivot and to the hindrance of fluid, reduced the consumption of piston and pivot at the pressure oil in-process to reduce pump body assembly's consumption.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view showing the installation relationship of the various components in the pump block assembly of the present invention; and

FIG. 2 shows a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 shows a schematic view of a shaft of the present invention with a shaft flow channel;

fig. 4 shows an enlarged view at b in fig. 3;

FIG. 5 is a schematic view of a shaft of the present invention with shaft flow holes formed therein;

fig. 6 shows a schematic view of a shaft section of the rotating shaft of the present invention located in the slide hole.

Wherein the figures include the following reference numerals:

10. a cylinder; 106. a piston bore; 20. a piston; 2011. a sliding hole; 30. a rotating shaft; 3011. a sliding fit surface; 3012. a rotating shaft circulation hole; 3013. a rotating shaft circulation groove; 3014. a long shaft section; 3015. a short shaft section; 3016. a connecting surface; 40. a cylinder liner.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

In order to solve the problem that the rotating shaft of the rotary cylinder compressor in the prior art obstructs the circulation of oil in the piston in the using process, the application provides a pump body assembly and a fluid machine.

The fluid machine includes a pump body assembly described below. In particular, the fluid machine is a compressor. Further, the compressor is a rotary cylinder compressor.

As shown in fig. 1 to 6, the pump body assembly includes a rotating shaft 30 and a piston 20, the piston 20 has a sliding hole 2011, at least a portion of the rotating shaft 30 is inserted into the sliding hole 2011, in the process that the piston 20 rotates along with the rotating shaft 30, a sliding hole wall of the sliding hole 2011 is in sliding fit with the rotating shaft 30, a rotating shaft circulation channel is provided on a shaft section of the rotating shaft 30 located in the sliding hole 2011, and the rotating shaft circulation channel extends along the sliding direction of the piston 20.

From the above description, it can be seen that, in the above embodiments of the present invention, the flow passage is provided on the shaft section of the rotating shaft 30 located inside the sliding hole 2011 of the piston 20, so as to enhance the smoothness of oil flow and reduce the power consumption of the pump body assembly. At present, when a rotating shaft of a pump body assembly slides relative to a piston in the operation process of a rotary cylinder compressor, the area of the rotating shaft, which is positioned inside the piston, blocks the flow of oil, so that the oil blocks the movement of the piston and the rotating shaft, and the power consumption of the pump body assembly is increased.

Specifically, the rotating shaft 30 penetrates through the sliding hole 2011 in the piston 20 to divide the interior of the piston 20 into two cavities, in the process of movement of the pump body assembly, the piston 20 reciprocates relative to the rotating shaft 30, the two cavities are periodically increased and decreased to realize the process of pressing oil, and the shaft section of the rotating shaft 30 located inside the sliding hole 2011 of the piston 20 extrudes oil to transfer the oil in the two cavities. Through set up pivot circulation channel on the shaft part that pivot 30 is located slide opening 2011 inside, reduce the hindrance of pivot 30 to fluid, reduced piston 20 and pivot 30 at the consumption of pressing oil in-process to the consumption of reduction pump body subassembly.

As shown in fig. 3 and 5, the number of the rotary shaft flow passages is plural, and the plural rotary shaft flow passages are provided at intervals in the axial direction of the rotary shaft 30. By arranging the rotating shaft 30 with a plurality of spaced rotating shaft circulation channels, oil can be transferred through the rotating shaft circulation channels in the oil pressing process, so that the circulation path is increased, and the power consumption of the piston 20 and the rotating shaft 30 in the oil pressing process is reduced.

Furthermore, the number of the rotating shaft flow channels is less than 4. When the number of the flow channels is larger than 4, the strength of the rotating shaft 30 is reduced due to the excessive number of the flow channels of the rotating shaft, and the rotating shaft 30 is easily broken due to the strength reduction of the rotating shaft 30 in the relative operation process of the rotating shaft 30 and the piston 20. The number of the rotating shaft circulation channels is less than 4, so that the strength of the rotating shaft 30 is not influenced while the circulation path of the oil liquid is increased.

It should be noted that in the embodiment shown in fig. 1 to 6, the rotating shaft flow passage is a passage provided in the rotating shaft 30 to enlarge the oil flow path. In the embodiments, the specific structure of the rotating shaft flow passage is various, so as to achieve the purpose of reducing the obstruction of the rotating shaft 30 to the oil transfer inside the sliding hole 2011 of the piston 20, which is not listed here.

Hereinafter, the following embodiments are provided to explain the structure of the flow channel of the rotary shaft.

In the embodiment shown in fig. 3 to 4, the sliding hole 2011 has a set of sliding hole walls disposed oppositely, the shaft section of the rotating shaft 30 located in the sliding hole 2011 has a sliding engagement surface 3011 engaged with the sliding hole walls, and the rotating shaft circulation channel is the rotating shaft circulation channel 3013 and disposed on the sliding engagement surface 3011.

Specifically, when the rotating shaft 30 moves relative to the sliding hole 2011 of the piston 20, the sliding fit surface 3011 on the rotating shaft 30 is in relative sliding fit with the sliding hole wall of the sliding hole 2011. The rotating shaft circulation groove 3013 is arranged on the sliding matching surface 3011, the sliding matching surface 3011 and the sliding hole wall extrude oil in the relative sliding process, the oil can be transferred through the rotating shaft circulation groove 3013, the resistance between the rotating shaft 30 and the piston 20 and the oil is reduced, and the power consumption of the pump body assembly is reduced.

Note that the slip fitting surface 3011 is a plane, that is, the slip hole wall is a plane. The sliding matching surface 3011 and the sliding hole wall slide back and forth relatively, and the rotating shaft circulation groove 3013 is provided on the surface of the sliding matching surface 3011.

As shown in fig. 4 and 6, the width t1 of the shaft passing groove 3013 accounts for 5% -20% of the diameter R1 of the shaft section of the shaft 30 located in the slide moving hole 2011. When the width t1 of the rotating shaft circulation slot 3013 is too small, the smoothness of oil liquid transfer in the oil pressing process cannot be effectively improved, and the effect of reducing the power consumption of the pump body assembly cannot be achieved. When the width t1 of the rotating shaft circulation groove 3013 is too large, the strength of the rotating shaft 30 is affected, and the rotating shaft 30 is easily broken during the movement of the rotating shaft 30 relative to the piston 20.

It should be noted that the width t1 of the rotating shaft circulation slot 3013 may be changed with the type of the rotating shaft 30, so as to improve the smoothness of the oil and reduce the power consumption of the pump assembly in the oil pressing process.

As shown in fig. 4 and 6, the depth h1 of the shaft flow groove 3013 is 5% -20% of the diameter R1 of the shaft section of the shaft 30 located in the slide-moving hole 2011.

Specifically, when the depth h1 of the rotating shaft circulation groove 3013 is too small, the smoothness of oil transfer in the oil pressing process cannot be effectively improved, and the effect of reducing the power consumption of the pump body assembly cannot be achieved. When the depth h1 of the rotating shaft flowing groove 3013 is too large, the strength of the rotating shaft 30 is affected, and the rotating shaft 30 is easily broken during the movement of the rotating shaft 30 relative to the piston 20.

It should be noted that the depth h1 of the rotating shaft circulation slot 3013 can be changed with the type of the rotating shaft 30, so as to improve the smoothness of the oil and reduce the power consumption of the pump body assembly in the oil pressing process.

In the specific embodiment shown in fig. 5, the sliding hole 2011 has a set of sliding hole walls disposed opposite to each other, a shaft section of the rotating shaft 30 located in the sliding hole 2011 has a sliding matching surface 3011 matched with the sliding hole wall, a shaft section of the rotating shaft 30 located in the sliding hole 2011 further has a set of connecting surfaces 3016 opposite to each other for connecting the two sliding matching surfaces 3011, the rotating shaft circulation channel is a rotating shaft circulation hole 3012, and the rotating shaft circulation hole 3012 penetrates through the two connecting surfaces 3016.

Specifically, the pivot 30 wears to establish the hole 2011 that slides of piston 20, divide into two cavitys with the hole 2011 that slides, presses oil in-process fluid to shift between two cavitys, through connecting face 3016 at two and set up pivot opening 3012 within a definite time to the realization improves the smooth and easy nature of fluid circulation, reduces the hindrance of fluid to pivot 30 and piston 20, reduces the consumption of pressing oil process pump body subassembly.

The slide fit surfaces 3011 are flat surfaces, and the distance L1 between the two slide fit surfaces 3011 is 2mm larger than the diameter of the shaft flow hole 3012. The sliding matching surfaces 3011 and the sliding hole walls slide relatively, friction is reduced by virtue of a planar design, and meanwhile, the distance L1 between the two sliding matching surfaces 3011 is 2mm larger than the diameter of the rotating shaft circulation hole 3012, so that the strength of the rotating shaft 30 is ensured, and the problem that the rotating shaft 30 is damaged and broken in the operation process due to the fact that the diameter of the rotating shaft circulation hole 3012 is too large is solved.

Further, the diameter of the rotating shaft flow hole 3012 is greater than or equal to 1 mm. When the diameter of the rotating shaft circulation hole 3012 is smaller than 1mm, the effect of reducing the pump body assembly cannot be achieved, and for improving the circulation smoothness of oil, the diameter of the circulation through hole needs to be larger than or equal to 1 mm.

As shown in fig. 3 and 5, the rotating shaft 30 includes a long axis section 3014 and a short axis section 3015 connected in sequence, the length of the long axis section 3014 is greater than that of the short axis section 3015, a sliding fitting surface 3011 is disposed on the long axis section 3014, and at least a portion of the long axis section 3014 extends into the sliding hole 2011.

Specifically, the sliding matching surface 3011 on the long shaft section 3014 is matched with a sliding hole wall inside the piston 20 to slide, and the rotating shaft circulation channel is arranged on the long shaft section 3014 to reduce power consumption of the rotating shaft 30 and the piston 20 in a pressure oil process.

As shown in fig. 3, 5, and 6, the diameter of the shaft segment located in the slip bore 2011 is greater than the diameter of the short shaft segment 3015. The junction between the end face of the shaft section and the short shaft section 3015 forms a step shape, and the junction between the end face of the shaft section and the short shaft section 3015 forms a support surface.

The pump body assembly further comprises a cylinder sleeve 40, the cylinder 10 is rotatably arranged in the cylinder sleeve 40, a piston hole 106 is formed in the cylinder 10 along the radial direction of the cylinder, the piston 20 is slidably arranged in the piston hole 106, the rotating shaft 30 penetrates through the piston 20 and drives the piston 20 to reciprocate along the extending direction of the piston hole 106, and the cylinder 10 rotates to drive the piston 20 to rotate.

Specifically, in the process that the rotating shaft 30 drives the piston 20 to reciprocate along the extending direction of the piston hole 106, the piston 20 extrudes oil to realize the oil pressing process of the pump body assembly, the oil is transferred inside two cavities formed by the rotating shaft 30, the piston 20 and the cylinder 10, and through arranging a rotating shaft circulation channel on the shaft section of the rotating shaft 30, the obstruction of the rotating shaft 30 to oil transfer in the oil flowing process is reduced, and the power consumption of the pump body assembly in the oil pressing process is reduced.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

through set up the circulation passageway on the shaft part of the inside pivot 30 of slide hole 2011 that is located piston 20 to the smoothness nature of reinforcing fluid circulation reduces pump body assembly's consumption. At present, in the process of operation of the rotary cylinder compressor, when the rotating shaft 30 of the pump body assembly slides relative to the piston 20, the area of the rotating shaft 30 inside the piston 20 blocks the flow of oil, so that the oil blocks the movement of the piston 20 and the rotating shaft 30, and the power consumption of the pump body assembly is increased.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pump body assembly, comprising:

a rotating shaft (30);

piston (20), piston (20) have slip bore (2011), at least some of pivot (30) are worn to establish in slip bore (2011), piston (20) follow pivot (30) pivoted in-process, the slip pore wall of slip bore (2011) with pivot (30) sliding fit, pivot (30) are located be provided with pivot circulation passageway on the axial region in slip bore (2011), just pivot circulation passageway is followed the slip direction of piston (20) extends.

2. The pump body assembly according to claim 1, wherein the rotary shaft flow passage is plural in number, and plural rotary shaft flow passages are provided at intervals in an axial direction of the rotary shaft (30).

3. The pump body assembly of claim 2, wherein the number of spindle flow passages is less than 4.

4. The pump body assembly according to claim 1, wherein the sliding hole (2011) has a set of oppositely disposed sliding hole walls, the shaft section of the rotating shaft (30) located in the sliding hole (2011) has a sliding mating surface (3011) mated with the sliding hole walls, and the rotating shaft circulation channel is a rotating shaft circulation channel (3013) and is disposed on the sliding mating surface (3011).

5. The pump body assembly according to claim 4, wherein the slip mating face (3011) is planar.

6. The pump body assembly according to claim 4, characterized in that the width t1 of the spindle flow channel (3013) is 5% -20% of the diameter R1 of the section of the spindle (30) located in the slide-moving hole (2011).

7. The pump body assembly according to claim 4, characterized in that the depth h1 of the spindle flow channel (3013) is 5% -20% of the diameter R1 of the shaft section of the spindle (30) located in the slide-moving hole (2011).

8. The pump body assembly according to claim 1, wherein the sliding hole (2011) has a set of sliding hole walls arranged oppositely, the shaft section of the rotating shaft (30) in the sliding hole (2011) has a sliding matching surface (3011) matched with the sliding hole walls, the shaft section of the rotating shaft (30) in the sliding hole (2011) further has a set of connecting surfaces (3016) opposite to each other for connecting the two sliding matching surfaces (3011), the rotating shaft circulation channel is a rotating shaft circulation hole (3012), and the rotating shaft circulation hole (3012) penetrates through the two connecting surfaces (3016).

9. The pump body assembly according to claim 8, wherein the slip fit surfaces (3011) are planar such that a distance L1 between the slip fit surfaces (3011) is 2mm greater than a diameter of the shaft flow hole (3012).

10. The pump body assembly according to claim 9, wherein the shaft flow holes (3012) have a diameter equal to or greater than 1 mm.

11. The pump body assembly according to claim 1, wherein the rotating shaft (30) comprises a long shaft section (3014) and a short shaft section (3015) which are connected in sequence, the length of the long shaft section (3014) is greater than that of the short shaft section (3015), a sliding matching surface (3011) is arranged on the long shaft section (3014), and at least one part of the long shaft section (3014) extends into the sliding hole (2011).

12. The pump body assembly according to claim 11, wherein the long shaft section (3014) has a diameter greater than a diameter of the short shaft section (3015).

13. The pump body assembly according to any one of claims 1 to 12, further comprising:

a cylinder liner (40);

the cylinder (10), the cylinder (10) rotationally sets up in the cylinder jacket (40), piston hole (106) have been seted up along its radial on the cylinder (10), piston (20) slide and set up in the piston hole (106), pivot (30) pass the piston (20) and drive the piston (20) along the extending direction reciprocating motion of piston hole (106), the cylinder (10) rotate in order to drive the piston (20) rotate.

14. A fluid machine, characterized by comprising a pump body assembly according to any one of claims 1 to 13.