CN217354757U - Oil supply device for compressor and compressor - Google Patents

Abstract

The utility model belongs to the compressor field discloses an oil supply unit and compressor for compressor. The compressor comprises a shell provided with an installation cavity and a crankshaft, wherein two ends of the crankshaft are rotationally connected with the shell through a rotary supporting piece; the oil supply device comprises an oil pump positioned in the installation cavity, the oil pump is sleeved on one end of the crankshaft and divides the installation cavity into a first cavity and a second cavity, the outer peripheral surface of the oil pump and the inner wall of the installation cavity form the first cavity, and the end surface of the oil pump and the inner wall of the installation cavity form the second cavity; the shell is also provided with a lead-in through hole and a connecting through hole, the lead-in through hole is communicated with the first cavity and the oil cavity, and the connecting through hole is communicated with the second cavity and the first cavity; the crankshaft is provided with a central through hole communicated with the second cavity; the oil pump is driven by the crankshaft to bring oil in the oil cavity into the lead-in through hole, the first cavity, the connecting through hole, the second cavity and the central through hole in sequence, and oil is supplied to the compressor, so that the compressor can run more safely and reliably under the refrigeration high-speed working condition and the ultralow-temperature heating low-speed working condition.

Description

Oil supply device for compressor and compressor

Technical Field

The utility model relates to a compressor field especially relates to an oil supply unit and compressor for compressor.

Background

The compressor is widely applied in refrigeration and air-conditioning industries, is a driven fluid machine for lifting low-pressure gas into high-pressure gas, and is a heart of a refrigeration system.

The structure of the existing compressor generally includes a power part, a compression part, a control part, an electric part, a heat dissipation part, a structural part, other accessories and the like. In order to reduce the abrasion of the moving parts, in the prior art, a part of lubricating oil is attached to the moving parts in a manner of smearing the moving parts in the installation process, then the moving parts are assembled, and the lubricating oil is prevented from being lost by packaging the parts such as a shell, a cover plate and the like.

However, the moving parts can only be accompanied by limited lubricating oil in the above manner, and under the high-speed refrigeration working condition and the low-speed ultra-low-temperature heating working condition, the lubricating oil is easy to solidify, so that poor lubrication or failure is caused, and even the compressor fails.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil supply unit and compressor for compressor is at the high-speed operating mode of refrigeration and the super low temperature low-speed operating mode operation safe and reliable more.

To achieve the purpose, the utility model adopts the following technical proposal:

on one hand, the oil supply device for the compressor comprises an oil pump, wherein the shell is provided with a mounting cavity, the oil pump is sleeved on the outer side of one end of the crankshaft and is positioned in the mounting cavity, the oil pump separates the mounting cavity into a first cavity and a second cavity which are mutually independent, the first cavity is formed between the outer peripheral surface of the oil pump and the inner wall of the mounting cavity, and the second cavity is formed between the end surface of the oil pump and the inner wall of the mounting cavity;

the shell is also provided with a lead-in through hole and a connecting through hole, the first cavity is communicated with the outside of the shell through the lead-in through hole, and the second cavity is communicated with the first cavity through the connecting through hole; the crankshaft is provided with a central through hole which is communicated with the second cavity;

the oil pump sets firmly the connection arch, the inner wall of first cavity is equipped with the spread groove, the connection arch is inserted and is located the spread groove, with under the drive of bent axle, the outer peripheral wall of oil pump can periodically with the inner wall butt of first cavity to make outside fluid can loop through the leading-in through-hole, first cavity, connect the through hole, the second cavity, the central through hole and follow the other end of bent axle flows.

Optionally, the oil supply device further comprises a sealing cover plate, the sealing cover plate is arranged at one end, deviating from the second cavity, of the first cavity, and the sealing cover plate is provided with a cover plate through hole.

Optionally, the crankshaft comprises a first shaft section at an end of the crankshaft and a second shaft section connected to the first shaft section, an axis of the first shaft section being non-coincident with an axis of the second shaft section; the second shaft section is rotationally connected with the shell, and the oil pump is sleeved on the outer side of the first shaft section.

Optionally, in a circumferential direction of the oil pump, a width a1 of the coupling groove is greater than a width a2 of the coupling protrusion; in a radial direction of the oil pump, a depth b1 of the coupling groove is greater than a height b2 of the coupling protrusion.

Optionally, the axis of the second shaft section (22) coincides with the centre line of the central through hole (25).

Optionally, the connecting protrusion comprises a first side and a second side which are oppositely arranged along the circumferential direction of the oil pump, the introducing through hole is arranged close to the first side, and the connecting through hole is arranged close to the second side.

Optionally, the lead-in through hole includes:

a first introduction hole section, one end of which communicates with the outside;

one end of the second lead-in hole section is communicated with the first cavity; the aperture of the second lead-in hole section is smaller than that of the first lead-in hole section;

a transition inlet bore section connected between the first inlet bore section and the second inlet bore section.

Optionally, the transition inlet hole section is a tapered hole, a large diameter end of the tapered hole is connected to the first inlet hole section, and a small diameter end of the tapered hole is connected to the second inlet hole section.

Optionally, the connection through hole is a through groove formed in the side wall of the installation cavity.

In another aspect, a compressor is provided, which includes a housing and a crankshaft, wherein two ends of the crankshaft are respectively rotatably connected with the housing through a rotary support; and an oil supply apparatus for a compressor including any one of the above.

The beneficial effects of the utility model reside in that:

the utility model provides an oil supply unit of compressor, usable oil pump will breathe in the side refrigeration oil through leading-in through-hole, first cavity, connect the through-hole, the second cavity, the central through-hole flows from the other end of bent axle, the initiative fuel feeding through oil supply unit, make the bearing and the vortex side of compressor, no matter be at the high-speed operating mode of refrigeration or the ultra-low temperature heats the low-speed operating mode under all can obtain sufficient oil mass, guarantee the lubrication, thereby avoided bearing and vortex dish to take place the dead problem of wearing and tearing card because lack the fuel feeding, the security and the reliability of compressor operation under the high-speed operating mode of refrigeration or the low-speed operating mode of ultra-low temperature heating have been improved.

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a schematic view of the oil pump end of the present invention;

FIG. 3 is a schematic view showing the relationship between the connecting protrusions and the connecting grooves of the present invention;

fig. 4 is a schematic diagram of the internal structure of the eccentric end of the present invention.

In the figure:

1. a housing; 11. leading in the through hole; 111. a first lead-in hole section; 112. a second lead-in hole section; 113. a transition lead-in hole section; 12. a connecting through hole;

2. a crankshaft; 21. a first shaft section; 22. a second shaft section; 23. mounting a shaft section; 24. connecting the shaft sections; 25. a central through hole;

3. a rotating support;

41. an oil pump; 411. a connecting projection; 4111. a first side; 4112. a second side; 42. sealing the cover plate;

5. a movable scroll;

6. an eccentric assembly; 61. an installation part; 62. an eccentric portion;

7. a connecting assembly; 71. a connecting pin; 72. connecting sleeves;

8. a first cavity; 81. connecting grooves;

9. a second cavity.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

The mode that current compressor often scribbles the grease to the part during through the assembly lubricates the inside moving part of compressor, and the grease of scribbling is very limited, can't stabilize the fuel feeding under the operating mode that lasts, causes the inside moving part of compressor to take place wearing and tearing because of lacking oil then, reduces life.

In order to solve the above problems, the present embodiment provides an oil supply device for a compressor, which is exemplified by a scroll compressor including a housing 1, a crankshaft 2, an orbiting scroll 5, a fixed scroll, and an eccentric assembly 6. Both ends of the crankshaft 2 are respectively rotatably connected to the housing 1 through a rotary support 3, for convenience of description, both ends of the crankshaft 2 are respectively referred to as a first end and a second end, and the rotary support 3 may be a bearing.

Specifically, as shown in fig. 1 and 2, the oil supply device includes an oil pump 41, the housing 1 is provided with a mounting cavity, the oil pump 41 is sleeved outside the first end of the crankshaft 2 and is located in the mounting cavity, the oil pump 41 partitions the mounting cavity into a first cavity 8 and a second cavity 9 which are independent of each other, the first cavity 8 is formed between the outer peripheral surface of the oil pump 41 and the inner wall of the mounting cavity, and the second cavity 9 is formed between the end surface of the oil pump 41 and the inner wall of the mounting cavity; the shell 1 is also provided with a lead-in through hole 11 and a connecting through hole 12, the first cavity 8 is communicated with the outside of the shell 1 through the lead-in through hole 11, and the second cavity 9 is communicated with the first cavity 8 through the connecting through hole 12; the crankshaft 2 is provided with a central through hole 25, and the central through hole 25 is communicated with the second cavity 9; the oil pump 41 is fixedly provided with a connecting protrusion 411, the inner wall of the first cavity 8 is provided with a connecting groove 81, the connecting protrusion 411 is inserted into the connecting groove 81, the outer peripheral wall of the oil pump 41 can be periodically abutted against the inner wall of the first cavity 8 under the driving of the crankshaft 2, so that external oil can sequentially pass through the guide-in through hole 11, the first cavity 8, the connecting through hole 12, the second cavity 9 and the central through hole 25 and flow out from the second end of the crankshaft 2, the moving parts connected to the second end of the crankshaft 2 are lubricated, the abrasion between the moving parts is reduced, and the service life is prolonged.

Specifically, the crankshaft 2 is fixedly connected with the rotor of the motor and rotates together with the rotor, the oil pump 41 moves in the first cavity 8 under the driving of the crankshaft 2, oil is sucked into the first cavity 8 through the lead-in through hole 11, the oil in the first cavity 8 enters the second cavity 9 from the connecting through hole 12 under the driving of the oil pump 41, and then the moving part connected to the second end of the crankshaft 2 is lubricated through the central through hole 25 communicated with the second cavity 9.

Further, as shown in fig. 1, the oil supply device further includes a sealing cover plate 42, the sealing cover plate 42 is disposed in the installation cavity, and is disposed on a different step layer from the oil pump 41, and is located at an end of the first cavity 8 away from the second cavity 9, and is used for forming the first cavity 8 together with the outer peripheral surface of the oil pump 41 and the inner circular surface of the installation cavity, so as to ensure the sealing performance of the first cavity 8, the sealing cover plate 42 is provided with a cover plate through hole, so that oil can lubricate the first end of the crankshaft 2 through the cover plate through hole, but the range of the cover plate through hole is not interfered with the first cavity 8, so that the sealing performance of the first cavity 8 is ensured, and the oil can flow out through the second cavity 9 and the central through hole 25 on the crankshaft 2.

In this embodiment, the crankshaft 2 includes a first shaft section 21 disposed at the first end and a second shaft section 22 connected to the first shaft section 21, an axis of the second shaft section 22 coincides with a center line of the central through hole 25, and an axis of the first shaft section 21 does not coincide with an axis of the second shaft section 22; the central through hole 25 is thus eccentrically arranged in the first shaft section 21, so that the thickness of the inner wall of the first shaft section 21 is not uniform. The second shaft section 22 is rotatably connected to the housing 1, specifically, the second shaft section 22 is sleeved with a rotating support 3 such as a bearing, and the oil pump 41 is sleeved outside the first shaft section 21. Since the wall thickness of the first shaft section 21 is not uniform, the oil pump 41 is driven to perform a circular motion when the crankshaft 2 rotates.

Specifically, the oil pump 41 is sleeved on the outer side of the first shaft section 21, the inner diameter of the oil pump 41 is larger than the outer diameter of the first shaft section 21, when the motor drives the crankshaft 2 to rotate, the first shaft section 21 rotates, because the thickness of the inner wall of the first shaft section 21 is inconsistent, the thick portion of the inner wall can push the oil pump 41 to lean against the inner wall of the first cavity 8, and when the first shaft section 21 rotates for one circle, the thick portion of the hole wall can push the oil pump 41 to complete one circle of circular motion along the inner wall of the first cavity 8.

Further, as shown in fig. 3, in the circumferential direction of the oil pump 41, the width a1 of the coupling groove 81 is larger than the width a2 of the coupling protrusion 411; the depth b1 of the coupling groove 81 is greater than the height b2 of the coupling protrusion 411 in the radial direction of the oil pump 41. Both there is the clearance between spread groove 81 and the connection arch 411, guarantee that oil pump 41 realizes circular motion at first cavity 8, restrict oil pump 41 simultaneously, avoid oil pump 41 to carry out the rotation along with first shaft segment 21.

Further, as shown in fig. 2 and 3, the connecting protrusion 411 includes a first side 4111 and a second side 4112 disposed opposite to each other in the circumferential direction of the oil pump 41, the introduction through hole 11 is disposed near the first side 4111, and the connection through hole 12 is disposed near the second side 4112. The lead-in through hole 11 and the connecting through hole 12 are arranged on two sides of the connecting protrusion 411 and are as close to the connecting protrusion 411 as possible, so that the oil in the first cavity 8 can be pressed into the second cavity 9 through the connecting through hole 12 in the process that the oil pump 41 moves close to the connecting through hole 12; when the oil pump 41 is attached to the inner wall of the first cavity 8 near the connecting through hole 12, a large gap is formed between the oil pump 41 and the introducing through hole 11, so that oil outside the housing 1 can be conveniently sucked into the first cavity 8.

Further, as shown in fig. 2, the introduction through hole 11 includes a first introduction hole section 111, a second introduction hole section 112, and a transition introduction hole section 113, wherein one end of the first introduction hole section 111 communicates with the outside; one end of the second lead-in hole section 112 is communicated with the first cavity 8; the aperture of the second inlet hole section 112 is smaller than that of the first inlet hole section 111; the transition inlet section 113 is a tapered hole, the large diameter end of which is connected to the first inlet section 111 and the small diameter end of which is connected to the second inlet section 112. Since the first inlet hole section 111 has a larger hole diameter than the second inlet hole section 112, the external oil can flow into the first chamber 8 more easily, and when the oil is sucked into the first inlet hole section 111 due to the difference in air pressure, the impact is larger, so that the impact is relieved when the oil passes through the tapered transitional inlet hole section 113, and the oil flows into the first chamber 8 more smoothly.

Further, the connecting through hole 12 is disposed on the inner wall of the housing 1, and is a through groove that passes through the first cavity 8 and the second cavity 9, and is used for guiding the oil in the first cavity 8 into the second cavity 9. Exemplary through slots may be semi-circular or polygonal.

In this embodiment, the crankshaft 2 further includes a mounting shaft section 23 provided at the second end and a connecting shaft section 24 connected to the mounting shaft section 23. The eccentric assembly 6 is sleeved on the mounting shaft section 23, the rotary support member 3 at the second end is sleeved on the outer side of the mounting portion 61 of the eccentric assembly 6, the movable scroll 5 is sleeved on the outer side of the rotary support member 3, and the eccentric portion 62 of the eccentric assembly 6 is located on one side of the crankshaft 2.

The compressor also has the tendency that the eccentric part 62 of the eccentric component 6 collides with the crankshaft 2 in the starting and stopping processes, so that metal collides with metal to generate noise; and the eccentric component 6 has overlarge radial swing amplitude along the crankshaft 2 in the motion process, so that the compressor does not stably run, and the performance of the compressor is influenced. In order to solve the above problem, the present embodiment provides a connecting assembly 7 for a compressor, which is exemplified by a scroll compressor.

As shown in fig. 4, the connecting assembly 7 includes a connecting pin 71 and a connecting sleeve 72. One end of the connecting pin 71 is connected with the connecting shaft section 24 of the crankshaft 2, the other end is connected with the eccentric assembly 6, and a pin hole corresponding to the connecting pin 71 is arranged on the eccentric assembly 6 along the axial direction of the crankshaft 2. The connecting sleeve 72 is located between the inner wall of the pin hole and the connecting pin 71 and sleeved outside the connecting pin 71, and the connecting sleeve 72 can generate elastic deformation to provide a supporting force for the eccentric assembly 6 along the radial direction of the crankshaft 2. Like this when eccentric subassembly 6 bumps into bent axle 2, elastic deformation takes place for adapter sleeve 72 to cushion eccentric subassembly 6, thereby radial flexible compensation is carried out to eccentric subassembly 6 through the radial elastic deformation of adapter sleeve 72, thereby guarantees to move vortex dish 5 and all has suitable spiral shell radial contact force in high low-speed full rotational speed cycle, guarantees to move vortex dish 5 on theoretical exact mesh orbit.

Further, the connecting sleeve 72 is made of an elastic material, and for example, nylon or rubber may be used. So that the connecting sleeve 72 can generate elastic deformation when stressed, and further play a role of buffering.

More closely, a plurality of protrusions are distributed on the outer peripheral surface of the connecting sleeve 72, so that the buffering effect of the connecting sleeve 72 is enhanced. Preferably, a plurality of protrusions are uniformly distributed on the outer circumferential surface of the connection sleeve 72.

Further, in the axial direction of the crankshaft 2, the depth of the pin hole is greater than the length of the connecting sleeve 72, so that a deformation reserved space is generated for the connecting sleeve 72, a certain assembly room is reserved for the connecting sleeve 72 during assembly, and the problem that assembly cannot be performed due to the fact that the length of the connecting sleeve 72 is greater than the depth of the pin hole is avoided.

Further, one end of the connecting pin 71 passes through the connecting sleeve 72 and protrudes outside the connecting sleeve 72. One end of the connecting pin 71 is connected with the connecting shaft section 24 of the crankshaft 2, the other end is outside the connecting shaft section 24 of the crankshaft 2, and the end positioned outside the connecting shaft section 24 of the crankshaft 2 passes through the connecting sleeve 72 and extends out of the connecting sleeve 72, so that even if the connecting sleeve 72 is deformed to be long, the connecting pin 71 can support the connecting sleeve 72, and the problem that the connecting sleeve 72 falls off from the connecting pin 71 in the moving process can be prevented.

Furthermore, the connecting pin 71 is screwed to the connecting shaft section 24, an external thread is provided at the end of the connecting pin 71 connected to the connecting shaft section 24, and a threaded hole matched with the connecting shaft section 24 is provided on the connecting shaft section 24, so that the connecting pin 71 can be conveniently fixed on the connecting shaft section 24 of the crankshaft 2 through screwing, and adjustment is facilitated.

Further, a gap is provided between the eccentric assembly 6 and the side wall of the connecting shaft segment 24. Since the eccentric assembly 6 tends to collide with the crankshaft 2 during the start and stop of the compressor, a gap is left between the eccentric assembly 6 and the sidewall of the connecting shaft segment 24 to increase a buffer distance, thereby preventing the eccentric assembly 6 from colliding with the crankshaft 2.

Further, the connecting pin 71 is provided with a stopper portion for preventing the connecting sleeve 72 from coming off from the end of the connecting pin 71. In the axial direction of the crankshaft 2, a gap is provided between the connecting shaft section 24 and the eccentric assembly 6, so that oil in the central through hole 25 can lubricate the moving parts of the second end through the gap.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. An oil supply device for a compressor, the compressor comprises a shell (1) and a crankshaft (2), and two ends of the crankshaft (2) are respectively and rotationally connected with the shell (1) through a rotary support piece (3);

the oil supply device for the compressor is characterized by comprising an oil pump (41), wherein a mounting cavity is arranged on the shell (1), the oil pump (41) is sleeved on the outer side of one end of the crankshaft (2) and is positioned in the mounting cavity, the mounting cavity is separated into a first cavity (8) and a second cavity (9) which are independent of each other by the oil pump (41), the first cavity (8) is formed between the outer peripheral surface of the oil pump (41) and the inner wall of the mounting cavity, and the second cavity (9) is formed between the end surface of the oil pump (41) and the inner wall of the mounting cavity;

the shell (1) is further provided with a lead-in through hole (11) and a connecting through hole (12), the first cavity (8) is communicated with the outside of the shell (1) through the lead-in through hole (11), and the second cavity (9) is communicated with the first cavity (8) through the connecting through hole (12); the crankshaft (2) is provided with a central through hole (25), and the central through hole (25) is communicated with the second cavity (9);

oil pump (41) has set firmly and has connected arch (411), the inner wall of first cavity (8) is equipped with spread groove (81), connect arch (411) to insert and locate spread groove (81).

2. The oil supply arrangement according to claim 1, characterized in that the oil supply arrangement further comprises a sealing cover plate (42), the sealing cover plate (42) being arranged at an end of the first cavity (8) facing away from the second cavity (9), the sealing cover plate (42) being provided with a cover plate through hole.

3. The oil supply device according to claim 1, characterized in that the crankshaft (2) comprises a first shaft section (21) at the end of the crankshaft (2) and a second shaft section (22) connected to the first shaft section (21), the axis of the first shaft section (21) being non-coincident with the axis of the second shaft section (22); the second shaft section (22) is rotationally connected with the shell (1), and the oil pump (41) is sleeved on the outer side of the first shaft section (21).

4. The oil supply device according to claim 3, wherein a width a1 of the connection groove (81) is larger than a width a2 of the connection protrusion (411) in a circumferential direction of the oil pump (41); in a radial direction of the oil pump (41), a depth b1 of the coupling groove (81) is greater than a height b2 of the coupling protrusion (411).

5. The oil supply according to claim 4, characterized in that the axis of the second shaft section (22) coincides with the centre line of the central through hole (25).

6. The oil supply device according to claim 5, wherein the connecting protrusion (411) includes a first side (4111) and a second side (4112) which are circumferentially opposite to each other along the oil pump (41), the introduction through hole (11) is provided near the first side (4111), and the connection through hole (12) is provided near the second side (4112).

7. The oil supply device according to claim 1, wherein the introduction through hole (11) includes:

a first introduction hole section (111), one end of the first introduction hole section (111) communicating with the outside;

a second inlet hole section (112), wherein one end of the second inlet hole section (112) is communicated with the first cavity (8); the aperture of the second lead-in hole section (112) is smaller than that of the first lead-in hole section (111);

a transition lead-in hole section (113), the transition lead-in hole section (113) being connected between the first lead-in hole section (111) and the second lead-in hole section (112).

8. The oil supply device according to claim 7, characterized in that the transition inlet section (113) is a tapered bore, the large diameter end of which is connected to the first inlet section (111) and the small diameter end of which is connected to the second inlet section (112).

9. The oil supply device according to claim 1, characterized in that the connecting through hole (12) is a through groove opened on the side wall of the mounting cavity.

10. A compressor, characterized by comprising an oil supply apparatus for a compressor according to any one of claims 1 to 9.

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