CN112610490A

CN112610490A - Pump body assembly and fluid machine

Info

Publication number: CN112610490A
Application number: CN202011590559.6A
Authority: CN
Inventors: 任丽萍; 杜忠诚; 李直; 张培林; 宋雪威; 于瑞波
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: 2021-04-06
Anticipated expiration: 2040-12-29
Also published as: CN112610490B

Abstract

The invention provides a pump body assembly and a fluid machine. The pump body assembly comprises a cylinder, the cylinder is rotatably arranged, and a limiting convex ring is arranged along the axial direction of the cylinder; the rotating shaft penetrates through the limiting convex ring and extends into the cylinder, and a clearance concave part is arranged on the inner ring surface of the limiting convex ring facing one side of the rotating shaft, so that a circulation gap is formed between the rotating shaft and the clearance concave part. The pump body assembly can solve the problem that in the prior art, the gap between the rotating shaft and the limiting convex ring on the cylinder is too small, so that the oil liquid flow is blocked.

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. The flow clearance formed by the rotating shaft in the existing pump body assembly and the inner wall of the limiting convex ring on the cylinder is too small, and the piston and the rotating shaft are blocked by oil in the moving process, so that the power consumption of pressing oil of the piston and the rotating shaft is increased, and the stability of the rotating shaft and the piston is influenced.

Therefore, the problem that the oil liquid flow is blocked due to the fact that the gap between the rotating shaft and the limiting convex ring on the air cylinder is too small exists in the use process of the existing rotary cylinder compressor.

Disclosure of Invention

The invention mainly aims to provide a pump body assembly and a fluid machine, and aims to solve the problem that in the prior art, the gap between a rotating shaft and a limiting convex ring on a cylinder is too small, so that the oil liquid flow is blocked.

In order to achieve the above object, according to one aspect of the present invention, there is provided a pump body assembly including a cylinder rotatably provided with a retainer collar along an axial direction thereof; the rotating shaft penetrates through the limiting convex ring and extends into the cylinder, and a clearance concave part is arranged on the inner ring surface of the limiting convex ring facing one side of the rotating shaft, so that a circulation gap is formed between the rotating shaft and the clearance concave part.

Further, the clearance concave part extends to the two side edges of the limit convex ring in the axial direction of the rotating shaft.

Furthermore, the clearance concave part is a clearance groove arranged on the inner ring surface, and the wall thickness of the limiting convex ring at the position of the clearance groove is thinner than that of the limiting convex ring without the clearance groove.

Further, the flow-through gap is larger than 1mm and smaller than 3 mm.

Further, the width of the clearance concave part along the circumferential direction of the inner ring surface is 2% -5% of the diameter of the inner ring surface.

Further, the flow gap is 2% -30% of the diameter of the inner ring surface.

Further, the minimum wall thickness t of the limiting convex ring at the position of the clearance concave part is larger than or equal to 1 mm.

Furtherly, seted up the piston hole along its is radial on the cylinder, the interior anchor ring of spacing bulge loop has relative first face section and second face section, the line perpendicular to piston hole's of first face section and second face section extending direction, and first face section and second face section all have the recess of keeping away.

Further, the pump body assembly further comprises a piston, the piston is provided with a sliding hole, the rotating shaft penetrates through the sliding hole, and a group of surface sections of the inner ring surface of the limiting convex ring in the extending direction of the sliding hole are provided with clearance concave parts.

Further, the pump body assembly still includes: a cylinder liner having a volume chamber; the cylinder is rotatably arranged in the volume cavity; the piston is arranged in a piston hole of the cylinder in a sliding mode, the rotating shaft penetrates through a sliding hole of the piston and drives the piston to reciprocate along the extending direction of the piston hole, and the 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 the air cylinder and the rotating shaft, the air cylinder is rotatably arranged, the air cylinder is provided with the limiting convex ring along the axial direction of the air cylinder, the rotating shaft penetrates through the limiting convex ring and extends into the air cylinder, and the inner ring surface of one side, facing the rotating shaft, of the limiting convex ring is provided with the clearance concave part, so that a circulation gap is formed between the rotating shaft and the clearance concave part.

From the above description, it can be seen that, in the above embodiments of the present invention, the clearance gap between the rotating shaft and the cylinder is increased by providing the clearance concave portion on the inner annular surface of the limiting convex ring on the cylinder, which faces one side of the rotating shaft, so as to reduce the resistance of the rotating shaft and the piston to the oil and improve the operation stability. At present, the flow clearance formed by the rotating shaft in the existing pump body assembly and the inner wall of the limiting convex ring on the cylinder is too small, and the piston and the rotating shaft are blocked by oil in the moving process, so that the power consumption of the piston and the rotating shaft for pressing the oil is increased, and the stability of the rotating shaft and the piston is influenced.

Specifically, the cylinder is passed in the pivot, forms the circulation clearance between the interior anchor ring of the spacing bulge loop of pivot and cylinder, through set up on the interior anchor ring of spacing bulge loop and keep away the empty concave part to enlarge the circulation clearance between pivot and cylinder, make fluid conveniently flow and shift, reduced the resistance of pivot and the fluid that the piston received at the rotation in-process effectively, avoid appearing the pivot and the piston receives the hindrance of fluid, lead to the consumption increase and the unstable phenomenon of pivot and piston.

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 is a schematic view of a cylinder with a clearance recess according to the present invention;

FIG. 4 shows a top view of FIG. 3;

fig. 5 shows an enlarged view at a in fig. 4.

Wherein the figures include the following reference numerals:

10. a cylinder; 106. a piston bore; 1011. a limit convex ring; 1012. a clearance recess; 1013. a first face section; 1014. a second face segment; 20. a piston; 2011. a sliding hole; 30. a rotating shaft; 40. a cylinder liner; 4001. a volume chamber.

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 gap between the rotating shaft 30 and the limiting convex ring 1011 on the cylinder 10 in the use process of the rotary cylinder compressor in the prior art is too small, so that the oil liquid flow is blocked, 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 5, the pump body assembly includes a cylinder 10 and a rotating shaft 30, the cylinder 10 is rotatably disposed, and the cylinder 10 has a limit convex ring 1011 along its axial direction; the rotating shaft 30 passes through the limit convex ring 1011 to extend into the cylinder 10, and the inner annular surface of the limit convex ring 1011 facing the rotating shaft 30 is provided with a clearance 1012, so that a flow gap is formed between the rotating shaft 30 and the clearance 1012.

As can be seen from the above description, in the above embodiment of the present invention, the clearance-avoiding recess 1012 is provided on the inner annular surface of the limit protruding ring 1011 on the cylinder 10, which faces the rotating shaft 30, so as to increase the flow gap between the rotating shaft 30 and the cylinder 10, reduce the resistance of the rotating shaft 30 and the piston 20 to the oil, and improve the operation stability. At present, the flow gap formed between the rotating shaft 30 in the existing pump body assembly and the inner wall of the limiting convex ring 1011 on the cylinder 10 is too small, and the piston 20 and the rotating shaft 30 are obstructed by oil liquid in the moving process, so that the power consumption of pressing oil of the piston 20 and the rotating shaft 30 is increased, and the stability of the rotating shaft 30 and the piston 20 is influenced.

Specifically, the rotating shaft 30 penetrates through the cylinder 10, a circulation gap is formed between the rotating shaft 30 and the inner annular surface of the limiting convex ring 1011 of the cylinder 10, and the clearance-avoiding concave part 1012 is arranged on the inner annular surface of the limiting convex ring 1011 to enlarge the circulation gap between the rotating shaft 30 and the cylinder 10, so that oil can conveniently flow and transfer, the resistance of the oil received by the rotating shaft 30 and the piston 20 in the rotating process is effectively reduced, and the phenomena that the power consumption of the rotating shaft 30 and the piston 20 is increased and is unstable due to the fact that the rotating shaft 30 and the piston 20 are blocked by the oil are avoided.

As shown in fig. 2 to 5, the clearance recess 1012 extends to both side edges of the stopper convex ring 1011 in the axial direction of the rotating shaft 30.

Specifically, clearance channels are formed at the edges of two sides of the clearance concave portion 1012 extending to the limit convex ring 1011 to enlarge the circulation gap, improve the smoothness of oil liquid when the circulation gap flows, reduce the obstruction of the oil liquid to the rotating shaft 30, and reduce the power consumption of the pump body assembly.

As shown in fig. 2 to 5, the clearance recess 1012 is a clearance groove provided on the inner annular surface, and the clearance groove makes the wall thickness of the stopper convex ring 1011 where it is located thinner than the wall thickness of the stopper convex ring 1011 where it is not provided.

Specifically, the clearance recess 1012 is a clearance groove formed in the inner annular surface, and the clearance groove is formed to increase a circulation gap at the clearance groove.

In the present invention, the flow gap is greater than 1mm and less than 3 mm. The circulation clearance is controlled within the range of 1mm to 3mm, so that the smoothness of oil liquid circulation can be effectively improved, and the power consumption of the pump body assembly is reduced. When the circulation clearance is less than 1mm, the smoothness of oil liquid when flowing through the circulation clearance can not be improved to the undersize of the circulation clearance, can not reach the effect of reducing the consumption of pump body subassembly. When the circulation clearance is greater than 3mm, too big circulation clearance can influence the intensity of the spacing bulge loop 1011 department of cylinder 10, causes the damage of spacing bulge loop 1011 easily, leads to cylinder 10 to appear the problem of slope and oil leak easily in the operation process, influences the steady operation of pump body subassembly simultaneously.

Specifically, the width of clearance recess 1012 in the circumferential direction of the inner ring surface is 2% -5% of the diameter of the inner ring surface. When the width of the clearance recess 1012 in the circumferential direction of the inner ring surface is too small, the width of the flow gap formed at the clearance recess 1012 is too small, which cannot effectively improve the smoothness of the oil flowing through the flow gap, and cannot achieve the effect of reducing the power consumption of the pump body assembly. When the width of the clearance concave portion 1012 along the circumferential direction of the inner ring surface is too large, the stability of the limit convex ring 1011 of the cylinder 10 is affected, so that the problems of inclination and oil leakage of the cylinder 10 are easily caused in the operation process, and the stable operation of the pump body assembly is affected.

It should be noted that the circumferential width of the clearance concave portion 1012 along the inner circumferential surface may vary with the size of the limit convex ring 1011 on the cylinder 10, and different types of cylinders 10 may have different widths of clearance concave portions 1012 on the inner circumferential surface of the limit convex ring 1011 corresponding to the cylinders 10.

As shown in fig. 4 to 5, the flow gap is 2% to 30% of the diameter of the inner ring surface. Specifically, when the pump body assembly presses oil, the oil can flow through the circulation gap to reduce the obstruction of the limiting convex ring 1011 to the oil, so that the smoothness of oil circulation is improved, and the power consumption of the pump body in the oil pressing process is reduced. When the flow clearance is too small, the smoothness of the oil flowing through the flow clearance cannot be improved due to too small flow clearance, and the effect of reducing the power consumption of the pump body assembly cannot be achieved. When the circulation clearance was too big, the intensity of the spacing bulge loop 1011 department of cylinder 10 can be influenced in too big circulation clearance, causes the damage of spacing bulge loop 1011 easily, leads to cylinder 10 to appear the problem of slope and oil leak easily in the operation process, influences the steady operation of pump body subassembly simultaneously.

It should be noted that the circulation gap may be changed with the size of the limit protruding ring 1011 on the cylinder 10, and different circulation gaps may be formed on the inner annular surface of the limit protruding ring 1011 of the cylinder 10 corresponding to cylinders 10 of different models.

As shown in fig. 5, the minimum wall thickness t of the stop collar 1011 at the clearance recess 1012 is greater than or equal to 1 mm. The wall thickness more than or equal to 1mm of spacing bulge loop 1011 department, at the cylinder 10 rotation process, spacing bulge loop 1011 has the positioning action, and spacing bulge loop 1011 influences the stability of cylinder 10, avoids cylinder 10 slope. The stopper convex ring 1011 has strength, and therefore the minimum wall thickness t of the stopper convex ring 1011 is 1mm or more. So as to ensure the strength of the limit convex ring 1011 and enable the cylinder 10 to operate stably.

As shown in fig. 1, 3, 4 and 5, the cylinder 10 is provided with a piston hole 106 along a radial direction thereof, the inner ring surface of the retainer collar 1011 has a first surface 1013 and a second surface 1014 which are opposite to each other, a connecting line between the first surface 1013 and the second surface 1014 is perpendicular to an extending direction of the piston hole 106, and the first surface 1013 and the second surface 1014 both have clearance recesses 1012.

Specifically, the connecting line of the first surface 1013 and the second surface 1014 of the limit convex ring 1011 of the cylinder 10 is perpendicular to the extending direction of the piston hole 106 on the cylinder 10, oil circulates at the first surface and the second surface, and the first surface 1013 and the second surface 1014 are both provided with the clearance concave 1012, so that the smoothness of the oil in the circulation gap can be increased, the oil can be conveniently transferred, and the power consumption of the pump body assembly can be reduced.

It should be noted that, in the process of installing the pump body assembly, the rotating shaft 30 may be close to the first section surface or the second section surface, and the clearance concave portion 1012 is disposed on both the first section surface and the second section surface, so that the technical effects achieved when the rotating shaft 30 is close to the first section surface or the rotating shaft 30 is close to the second section surface are the same, the smoothness of the oil can be improved, and the installation is facilitated.

As shown in fig. 1 to 5, the pump body assembly further includes a piston 20, the piston 20 has a sliding hole 2011, the rotating shaft 30 passes through the sliding hole 2011, and a group of surface sections of the inner ring surface of the limit convex ring 1011 in the extending direction of the sliding hole 2011 are provided with clearance recesses 1012.

Specifically, the piston 20 is provided with the sliding hole 2011, the piston 20 moves in the cylinder 10 to press oil, the piston 20 extrudes oil to transfer the oil, the oil can flow through a group of section surfaces of the limiting convex ring 1011 in the extending direction of the sliding hole 2011 after being extruded by the piston 20, the clearance concave part 1012 is arranged on the section surface, the resistance of the oil extruded by the piston 20 can be reduced, the vibration of the piston 20 is reduced, the problem of damage to the piston 20 is avoided, meanwhile, the clearance concave part 1012 improves the smoothness of oil circulation, the resistance between the rotating shaft 30 and the oil is reduced, and the power consumption of the pump body assembly is reduced. Here, the extending direction of the piston bore 106 and the extending direction of the sliding bore 2011 are referred to, wherein the extending direction of the piston bore 106 and the extending direction of the sliding bore 2011 may be the same or perpendicular. Specifically in fig. 2, it is apparent that the piston bore 106 extends in a direction perpendicular to the direction of extension of the slip bore 2011.

As shown in fig. 1, the pump body assembly further includes a cylinder sleeve 40, the cylinder sleeve 40 has a volume cavity 4001, the cylinder 10 is rotatably disposed in the volume cavity 4001, the piston 20 is slidably disposed in the piston hole 106 of the cylinder 10, the rotating shaft 30 passes through the sliding hole 2011 of 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, the cylinder 10 and the shaft 30 rotate, and the cylinder 10 can rotate the piston 20. The rotating shaft 30 penetrates through the sliding hole 2011 of the piston 20 and divides the cylinder 10 and the volume cavity 4001 inside the piston 20 into two cavities, the piston 20 reciprocates inside the piston hole 106 along the extending direction of the piston hole 106 under the action of the rotating shaft 30, the reciprocating motion of the piston 20 causes the two cavities to become large and small periodically, and meanwhile, the piston 20 extrudes oil inside the cylinder 10 so as to realize periodic transfer of the oil inside the two cavities. The clearance concave part 1012 is arranged on the inner ring surface of the limiting convex ring 1011 of the cylinder 10, so that the obstruction of oil liquid by the limiting convex ring 1011 in the transferring process can be reduced, the smoothness of oil liquid transfer is improved, and the power consumption of the pump body assembly is reduced.

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

the clearance concave part 1012 is arranged on the inner ring surface of the limiting convex ring 1011 on the cylinder 10, which faces to one side of the rotating shaft 30, so that the circulation gap between the rotating shaft 30 and the cylinder 10 is increased, the resistance of the rotating shaft 30 and the piston 20 to oil is reduced, and the operation stability is improved. At present, the flow gap formed between the rotating shaft 30 in the existing pump body assembly and the inner wall of the limiting convex ring 1011 on the cylinder 10 is too small, and the piston 20 and the rotating shaft 30 are obstructed by oil liquid in the moving process, so that the power consumption of pressing oil of the piston 20 and the rotating shaft 30 is increased, and the stability of the rotating shaft 30 and the piston 20 is influenced.

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:

the air cylinder (10), the air cylinder (10) can be rotationally arranged, and the air cylinder (10) is provided with a limit convex ring (1011) along the axial direction thereof;

the rotating shaft (30) penetrates through the limiting convex ring (1011) to extend into the cylinder (10), and an empty avoiding concave part (1012) is arranged on the inner annular surface of one side, facing the rotating shaft (30), of the limiting convex ring (1011), so that a circulation gap is formed between the rotating shaft (30) and the empty avoiding concave part (1012).

2. The pump body assembly according to claim 1, wherein the clearance recess (1012) extends to both side edges of the stopper collar (1011) in the axial direction of the rotary shaft (30).

3. The pump body assembly according to claim 1, wherein the clearance recess (1012) is a clearance groove provided on the inner ring surface, the clearance groove being such that a wall thickness of the stopper convex ring (1011) where it is located is thinner than a wall thickness of the stopper convex ring (1011) where the clearance groove is not provided.

4. The pump body assembly according to claim 1, wherein the flow gap is greater than 1mm and less than 3 mm.

5. The pump body assembly according to claim 1, wherein the width of the clearance recess (1012) in the circumferential direction of the inner annular surface is 2-5% of the diameter of the inner annular surface.

6. The pump body assembly of claim 1, wherein the flow gap is 2% -30% of the diameter of the inner annular surface.

7. The pump body assembly according to claim 1, characterized in that the minimum wall thickness t of the stop collar (1011) at the clearance recess (1012) is greater than or equal to 1 mm.

8. The pump body assembly according to claim 1, wherein the cylinder (10) is provided with a piston hole (106) along a radial direction thereof, the inner annular surface of the retainer collar (1011) is provided with a first surface section (1013) and a second surface section (1014) which are opposite to each other, a connecting line of the first surface section (1013) and the second surface section (1014) is perpendicular to an extending direction of the piston hole (106), and the first surface section (1013) and the second surface section (1014) are provided with the clearance concave portion (1012).

9. The pump body assembly according to claim 1, further comprising a piston (20), wherein the piston (20) has a sliding hole (2011), the rotating shaft (30) passes through the sliding hole (2011), and a group of surface sections of an inner ring surface of the limit convex ring (1011) in an extending direction of the sliding hole (2011) are provided with the clearance concave portion (1012).

10. The pump body assembly according to any one of claims 1 to 9, further comprising:

a cylinder liner (40), the cylinder liner (40) having a volume cavity (4001);

a cylinder (10), said cylinder (10) rotatably disposed within said volume (4001);

the piston (20), piston (20) slide to set up in piston hole (106) of cylinder (10), pivot (30) pass slide hole (2011) of piston (20) and drive piston (20) are followed the extending direction reciprocating motion of piston hole (106), cylinder (10) rotate in order to drive piston (20) rotate.

11. A fluid machine, characterized by comprising a pump body assembly according to any one of claims 1 to 10.