CN213838900U - Rotor compressor lubricating system and rotor compressor - Google Patents

Abstract

The utility model relates to a rotor compressor lubricating system, which comprises a compressor cylinder, a compressor roller, a slip sheet, a cylinder cover and a ball; the cylinder wall of the compressor cylinder is provided with a abdicating groove; the cylinder cover is provided with a lubricating oil hole, the lubricating oil hole comprises a first hole cavity and a second hole cavity, the projection of the first hole cavity in the second hole cavity falls into the second hole cavity, the ball is arranged in the second hole cavity and positioned outside the first hole cavity, and the surface of the ball is tangent to the opening edge of the first hole cavity facing the second hole cavity; the opening of the second hole cavity is located on the binding face of the compressor cylinder and the cylinder cover, and the compressor cylinder covers part of the opening of the second hole cavity. The utility model provides a rotor compressor lubricating system through set up mobilizable ball in the lubrication oil hole, realizes stepping down the sealed and open in groove space, can prevent on the one hand to get into the refrigerant along the lubrication oil hole seepage to the casing in the groove of stepping down, and on the other hand can be in good time through the lubrication oil hole to the inslot supplementary lubricating oil that steps down.

Description

Rotor compressor lubricating system and rotor compressor

Technical Field

The utility model relates to a refrigeration plant field especially relates to a rotor compressor lubricating system and rotor compressor.

Background

The compressor is a key part in refrigeration equipment, and with the continuous improvement of energy-saving and environment-friendly requirements, people need to be small in size, energy-saving and power-saving, and meanwhile, higher refrigeration efficiency needs to be kept. Among compressors, a rotor compressor is driven by an engine or a motor, particularly a sliding vane type rotor compressor, a compressor roller rolls along a cylinder wall, a sliding vane and the compressor roller are integrated, the sliding vane swings back and forth in the middle of a swinging sliding vane, and oil film sealing is formed by lubricating oil among moving parts. When the motor drives the crankshaft to move, the volume change of a containing cavity formed by the outer ring of the compressor roller, the cylinder hole of the cylinder, the sliding sheet and the like can be caused, and the air suction and exhaust process is completed.

In the sliding vane type rotor compressor, a working cavity with a special shape is formed among a rotor, a sliding vane and a cylinder, and the problem that a refrigerant leaks into the working cavity continuously exists in the compression process, so that the dosage of the refrigerant flowing in the compressor is reduced, the input power is increased, and the refrigeration efficiency is reduced. In addition, since the sliding vane continuously slides relative to the cylinder, good lubrication needs to be provided for the sliding vane, however, the refrigerant and the lubricating oil are both generally fluid, and when the lubricating oil is allowed to enter the working chamber, the refrigerant is easy to enter, so that the refrigerant leakage occurs.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a lubrication system for a rotor compressor and a rotor compressor, which address at least one of the above-mentioned problems.

In a first aspect, the present application provides a rotary compressor lubrication system comprising a compressor cylinder, a compressor roller, a slide vane, a cylinder head, and a ball;

the slip sheet is detachably connected to the compressor roller, the cylinder wall of the compressor cylinder is provided with an abdicating groove, and the slip sheet can periodically move in the abdicating groove;

the compressor cylinder is attached to the cylinder cover, a lubricating oil hole is formed in the cylinder cover and comprises a first hole cavity and a second hole cavity, the projection of the first hole cavity in the second hole cavity falls into the second hole cavity, the ball is arranged in the second hole cavity and located outside the first hole cavity, and the surface of the ball is tangent to the edge of an opening, facing the second hole cavity, in the first hole cavity;

the opening of the second hole cavity is located on the binding face of the compressor cylinder and the cylinder cover and located in the abdicating groove, and the compressor cylinder covers part of the opening of the second hole cavity.

In certain implementations of the first aspect, a cross-sectional shape of the oil hole in the axial direction of the hole is funnel-shaped, the first bore is cylindrical, and the second bore is truncated cone-shaped.

With reference to the first aspect and the implementations described above, in certain implementations of the first aspect, the compressor cylinder blocks one-half of an opening of the second bore; the diameter of the ball is larger than the diameter of the cross section of the first cavity in the radial direction, and the diameter of the ball is smaller than the diameter of the cross section of the second cavity in the radial direction.

With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, the abdicating groove includes a first groove body and a second groove body, the first groove body is close to the cylinder wall of the compressor cylinder, the second groove body is communicated with the first groove body, and symmetrical retracting necks are formed at a joint of the first groove body and the second groove body.

With reference to the first aspect and the foregoing implementations, in certain implementations of the first aspect, the slider further includes a swinging slider; the first groove body comprises a curved inner wall; the swinging sliding sheet is arranged in the first groove body and positioned on two sides of the sliding sheet; the cross section of the second groove body is in the shape of a motion track of the free end of the sliding sheet.

With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, the cross-sectional shape of the first groove body is a symmetrical curve shape; the swing sliding piece comprises a curved part and a plane part, the curved part is attached to the inner wall of the first groove body, and the plane part is attached to the sliding piece; the opening of the first groove body faces the compressor cylinder.

With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, a connection portion between the second groove body and the first groove body is a smooth transition connection.

With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the sliding piece is a strip shape, and two side surfaces of the sliding piece in the width direction form a preset included angle; the free end of the sliding piece is a round-angle end.

In a second aspect, the present application provides a rotary compressor comprising a rotary compressor lubrication system as described in the first aspect of the present application.

The embodiment of the utility model provides an in the technical scheme who provides bring following beneficial technological effect:

the utility model provides a rotor compressor lubricating system, tank bottom through the groove of stepping down at gleitbretter motion space sets up the lubrication hole, and set up mobilizable ball in the lubrication hole, realize stepping down the groove space sealed with open, can prevent on the one hand to get into the refrigerant along the lubrication hole seepage to the casing in the groove of stepping down, prevent to reduce the content of refrigerant, on the other hand can be in good time through the lubrication hole to the inslot supplementary lubricating oil that steps down, make the gleitbretter obtain fully lubricated, both ensure that rotor compressor has higher refrigeration efficiency, can guarantee again that rotor compressor is life.

Additional aspects and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic diagram of an explosion state of a three-dimensional structure of a lubrication system of a rotor compressor according to an embodiment of the present invention;

fig. 2 is a schematic assembly view of a three-dimensional structure of a lubrication system of a rotor compressor according to an embodiment of the present invention;

fig. 3 is a schematic plan view of a lubrication system of a rotor compressor according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a cylinder head of a rotary compressor according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Possible embodiments of the invention are given in the figures. The invention may, however, be embodied in many different forms and is not limited to the embodiments described herein by way of example only and with reference to the accompanying drawings. The embodiments described herein with reference to the drawings are illustrative for the purpose of providing a more thorough understanding of the present disclosure and are not to be construed as limiting the present disclosure. Furthermore, if a detailed description of known technologies is not necessary for illustrating the features of the present invention, such technical details may be omitted.

It will be understood by those within the relevant art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It is to be understood that the term "and/or" as used herein is intended to include all or any and all combinations of one or more of the associated listed items.

In the prior art, especially in a sliding vane type rotor compressor, a working cavity with a special shape is formed among a rotor, a sliding vane and a cylinder, and along with the change of a rotor corner, the volume of gas in the volume is continuously increased and decreased for circulation, so that the working process of the compressor is completed, and low-temperature and low-pressure refrigerant steam is changed into high-temperature and high-pressure refrigerant. The motor drives the crankshaft to rotate, the crankshaft drives the rotor to roll periodically along the inner wall of the cylinder through the eccentric shaft, and drives the sliding sheet to do reciprocating swing along the rotating shaft between the sliding sheet and the rotor, so that the refrigerating medium is pushed repeatedly to form a refrigerating cycle. Usually, for the sake of processing convenience, the working chamber is made into two mutually fused cylindrical shapes, however, the space of the cylindrical shape is large, and a large amount of refrigerant is accumulated.

In addition, the slip sheet does long-time periodic motion in the working cavity at high speed, and rubs with the cylinder, if good lubrication can not be obtained, the service life of the rotor compressor is seriously influenced, and the refrigeration efficiency of the rotor compressor is inevitably influenced. Generally, lubricating oil and refrigerant in the compressor are both fluid, and it is inconvenient to distinguish the flow.

The utility model provides a rotor compressor lubricating system and rotor compressor aims at solving prior art's above technical problem. The technical solution of the present invention and how to solve the above technical problems will be described in detail with specific embodiments.

The axial direction means a direction along the elongated object, and is a direction of a rotation center axis of a cylinder in the case of a cylindrical object, that is, a direction common to the center axis, and is a direction of a geometric center axis of a cubic column in the case of a cubic column object. Radial refers to the direction through the axis in a radial plane, being the linear direction along a diameter or radius, or perpendicular to the axis.

Embodiments of a first aspect of the present application provide a lubrication system of a rotary compressor, as shown in fig. 1 to 3, including a compressor cylinder 100, a compressor roller 200, a vane 300, a cylinder head 500, and a ball 600. The sliding vane 300 is detachably connected to the compressor roller 200, the cylinder wall of the compressor cylinder 100 is provided with a yielding groove 110, and the sliding vane 300 can periodically move in the yielding groove 110.

As shown in fig. 2 to 4, the compressor cylinder 100 is attached to the cylinder head 500, the cylinder head 500 is provided with a lubricating oil hole 510, the lubricating oil hole 510 includes a first bore 511 and a second bore 512, a projection of the first bore 511 in the second bore 512 falls into the second bore 512, the ball 600 is disposed in the second bore 512 and located outside the first bore 511, and a surface of the ball 600 is tangential to an opening edge of the first bore 511 facing the second bore 512. The opening of the second bore 512 is located on the abutting surface of the compressor cylinder 100 and the cylinder cover 500 and located in the relief groove 110, and the compressor cylinder 100 blocks a part of the opening of the second bore 512.

As shown in fig. 3 and 4, one end of the oil hole 510 generally extends into the oil in the oil pan and is soaked by the oil, and the other end is opened in the relief groove 110. The ball 600 is disposed in the second bore 512 of the oil hole 510, and the ball 600 is smaller than the second bore 512 in shape and size, can move in the second bore 512, and is larger than the first bore 511 in shape and size, and does not fall into the first bore 511. In the periodic movement of the slider 300, the ball 600 follows the periodic movement, although the movement patterns are different.

When the sliding sheet 300 enters the receding groove 110, most of the space of the receding groove 110 is filled, the receding groove 110 is a relatively sealed space under the sealing of the upper cylinder cover 500 and the lower cylinder cover 500 of the compressor cylinder 100, the internal air pressure is increased, the ball 600 can be pressed to abut against the opening of the first hole 511, and the lubricating oil hole 510 is sealed. At this time, the internal pressure of the relief groove 110 is high, and the refrigerant is not easily introduced into the relief groove 110.

When the sliding piece 300 is drawn out of the yielding groove 110, the air pressure in the yielding groove 110 is reduced, so that the lubricating oil is pressed into the yielding groove 110 from the lubricating oil hole 510 by the external air pressure, the ball 600 is not pressed at the opening of the first hole cavity 511, a small amount of lubricating oil can enter the yielding groove 110, the lubricating oil in the yielding groove 110 is continuously supplemented by a small amount, and the lubricating oil is provided for the relative motion between the sliding piece 300 and the compressor cylinder 100.

The utility model provides a rotor compressor lubricating system, the tank bottom through the groove 110 of stepping down in gleitbretter 300 motion space sets up lubricating oil hole 510, and set up mobilizable ball 600 in lubricating oil hole 510, realize stepping down the sealed and open in groove 110 space, can prevent on the one hand to get into the refrigerant along lubricating oil hole 510 seepage to the casing of groove 110 of stepping down, prevent to reduce the content of refrigerant, on the other hand can be in good time through lubricating oil hole 510 to the inslot supplementary lubricating oil of stepping down 110, make gleitbretter 300 obtain sufficient lubrication, both ensure that rotor compressor has higher refrigeration efficiency, can guarantee again that rotor compressor is life.

Alternatively, in certain implementations of the first aspect embodiment, as shown in fig. 4, the lubricating oil hole 510 has a funnel-shaped cross-sectional shape in the axial direction of the hole, the first bore 511 is cylindrical, and the second bore 512 is truncated cone-shaped. Through setting up lubricating oil hole 510 for cylindrical vestibule and round platform shape vestibule two kinds of forms, can enough satisfy holding and the restriction to ball 600, can reduce the processing degree of difficulty again, reduce manufacturing cost.

Alternatively, in certain implementations of the first aspect embodiment, as shown in fig. 3, the compressor cylinder 100 blocks one-half of the opening of the second bore 512; ball 600 has a diameter greater than the radial cross-sectional diameter of first bore 511 and ball 600 has a diameter less than the radial cross-sectional diameter of second bore 512.

Optionally, in some implementations of the first aspect embodiment, as shown in fig. 2 and 3, the abdicating groove 110 includes a first groove body 111 and a second groove body 112, the first groove body 111 is close to the cylinder wall of the compressor cylinder 100, the second groove body 112 is communicated with the first groove body 111, and the abdicating groove 110 is formed with symmetrical constrictions at a connection of the first groove body 111 and the second groove body 112. Optionally, the slider 300 further comprises a swinging slider 300; the first tank 111 includes a curved inner wall; the swinging sliding sheet 300 is arranged in the first groove body 111 and positioned at two sides of the sliding sheet 300; the cross section of the second slot 112 is the motion track of the free end of the sliding sheet 300.

Optionally, in certain implementations of embodiments of the first aspect of the present application, as shown in fig. 2 and 3, the cross-sectional shape of the first channel 111 is a symmetrical curve; the swinging sliding sheet 300 comprises a curved part and a plane part, wherein the curved part is attached to the inner wall of the first groove body 111, and the plane part is attached to the sliding sheet 300; the first groove 111 opens toward the compressor cylinder 100. Optionally, the joint of the second slot 112 and the first slot 111 is in smooth transition connection.

Accordingly, the rocking slide 300 includes a curved portion attached to the inner wall of the first slot 111 and a flat portion attached to the slide 300. The curve in the cross section of the curve part is also a unilateral hyperbolic curve, and the curve part and the plane part are in smooth transition, so that the friction effect of the swinging sliding piece 300 in the motion process is ensured to be as small as possible. The first slot 111 is preset to provide a space for the periodic movement of the sliding blade 300, and the hyperbolic cross-sectional shape is adopted to ensure that the inner wall of the first slot 111 is as close as possible to the most edge of the movement track of the sliding blade 300 in the first slot 111, that is, the space of the first slot 111 can be reduced as much as possible.

The technical effect brought by adopting the hyperbolic cross section shape is as follows: the first groove body 111 and the swinging sliding piece 300 are convenient to process and manufacture. Of course, the first groove 111 is a hyperbolic shape on one side of a hyperbolic curve, and the specific functional relationship corresponding to the hyperbolic curve is determined according to the actual production and manufacturing requirements of the rotor compressor cylinder 100. The curved surface of the first groove 111 may be a part of a cylinder, and the cross-sectional shape of the corresponding first groove 111 may be a part of a circle.

Optionally, in some implementations of the embodiments of the first aspect of the present application, the sliding piece 300 is a long strip, and two side surfaces of the sliding piece 300 in the width direction form a preset included angle; the free end of the slider 300 is a rounded end.

The vane 300 is disposed at a notch of the abdicating groove 110, and a part of the vane 300 is located in the compression cylinder, that is, within a moving trace range of the compressor roller 200. Specifically, as shown in fig. 2 and 3, the sliding piece 300 is detachably connected to the compressor roller 200, wherein a snap-fit connection may be specifically selected, for example, a dovetail groove is provided at a certain position of the compressor roller 200, and the end of the sliding piece 300 is provided as a shrink neck structure matching the dovetail groove. When the compressor roller 200 periodically moves, specifically, the compressor roller 200 moves close to the cylinder wall, the sliding vane 300 connected to the compressor roller 200 is driven to move.

The first groove 111 is internally provided with a swinging sliding sheet 300, and the two opposite swinging sliding sheets 300 can rotate around the geometric center of the first groove 111 under the limitation of the curved inner wall. Meanwhile, the swing slider 300 is disposed at both sides of the slider 300, and the slider 300 can freely slide between the two swing sliders 300, and particularly, slide with respect to the swing slider 300. The swinging sliding vane 300 can prevent the substance in the compressor cylinder 100 from entering the yielding groove 110, slow down the refrigerant from entering the yielding groove 110, and further improve the refrigeration efficiency of the rotor compressor.

Because the motion trail of the free end on the sliding piece 300 is not generally circular, rectangular or triangular but similar to a spindle shape according to the size of the rotor, the eccentric position, the length of the sliding piece 300, the connection position and the connection mode of the sliding piece 300 and the rotor, and the like, the cross section of the second slot body 112 is also in a spindle shape. In fact, due to the limitation of the assembly relationship, the cross-sectional shape of the second slot 112 is not completely equal to the movement track of the free end of the sliding piece 300, and the cross-sectional shape of the second slot 112 is slightly larger than the movement track of the free end, for example, the contour line of the cross-sectional shape is spaced from the outermost periphery of the movement track of the free end by 0.5mm to 1.5mm, so as to avoid the sliding piece 300 from directly contacting with the slot wall of the second slot 112 during the movement process to cause abrasion.

The utility model provides a cylinder among the rotor compressor lubricating system adopts the groove 110 of stepping down that has special shape, should step down groove 110 and include first cell body 111 and second cell body 112, second cell body 112 is set for according to the free end movement track of gleitbretter 300 among the rotor compressor cylinder 100, can be fully close the maximum motion range of gleitbretter 300, effectively reduce unnecessary space surplus, make the space of groove 110 of stepping down minimize, thereby reduce the space that can hold the refrigerant by a wide margin, consequently, the leakage of refrigerant has been reduced, the refrigerating output is improved, the input power is reduced, and the refrigerating efficiency is improved.

In a second aspect, the present application provides a rotary compressor comprising a rotary compressor cylinder as described in the first aspect of the present application. The rotor compressor may naturally further include other components, such as a liquid reservoir, a suction muffling chamber, a discharge valve plate, a limiting plate, a discharge muffling chamber, a labyrinth structure, and the like, which are well known to those skilled in the art and will not be described in further detail.

Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims (9)

1. A rotor compressor lubricating system is characterized by comprising a compressor cylinder, a compressor roller, a sliding vane, a cylinder cover and a ball;

the slip sheet is detachably connected to the compressor roller, the cylinder wall of the compressor cylinder is provided with an abdicating groove, and the slip sheet can periodically move in the abdicating groove;

the compressor cylinder is attached to the cylinder cover, a lubricating oil hole is formed in the cylinder cover and comprises a first hole cavity and a second hole cavity, the projection of the first hole cavity in the second hole cavity falls into the second hole cavity, the ball is arranged in the second hole cavity and located outside the first hole cavity, and the surface of the ball is tangent to the edge of an opening, facing the second hole cavity, in the first hole cavity;

the opening of the second hole cavity is located on the binding face of the compressor cylinder and the cylinder cover and located in the abdicating groove, and the compressor cylinder covers part of the opening of the second hole cavity.

2. The rotary compressor lubrication system as recited in claim 1, wherein a cross-sectional shape of the oil hole in an axial direction of the hole is funnel-shaped, the first bore is cylindrical, and the second bore is truncated cone-shaped.

3. The rotary compressor lubrication system of claim 2, wherein the compressor cylinder blocks one-half of the opening of the second bore; the diameter of the ball is larger than the diameter of the cross section of the first cavity in the radial direction, and the diameter of the ball is smaller than the diameter of the cross section of the second cavity in the radial direction.

4. The rotor compressor lubrication system according to claim 1, wherein the abdicating groove comprises a first groove body and a second groove body, the first groove body is close to the cylinder wall of the compressor cylinder, the second groove body is communicated with the first groove body, and symmetrical contracting necks are formed at the joint of the first groove body and the second groove body.

5. The rotor compressor lubrication system as recited in claim 4, wherein the vane further comprises a swinging vane; the first groove body comprises a curved inner wall; the swinging sliding sheet is arranged in the first groove body and positioned on two sides of the sliding sheet; the cross section of the second groove body is in the shape of a motion track of the free end of the sliding sheet.

6. The rotor compressor lubrication system as recited in claim 5, wherein the cross-sectional shape of the first slot is a symmetrical curve; the swing sliding piece comprises a curved part and a plane part, the curved part is attached to the inner wall of the first groove body, and the plane part is attached to the sliding piece; the opening of the first groove body faces the compressor cylinder.

7. The lubrication system of the rotor compressor as recited in claim 4, wherein the junction of the second groove and the first groove is in smooth transition connection.

8. The lubrication system of a rotor compressor of claim 1, wherein the sliding vane is a long bar shape, and two side surfaces of the sliding vane in a width direction form a preset included angle; the free end of the sliding piece is a round-angle end.

9. A rotary compressor comprising a rotary compressor lubrication system according to any one of claims 1 to 8.

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