CN114810604B - Fluid control assembly, oil supply control mechanism and rotary compressor - Google Patents
Fluid control assembly, oil supply control mechanism and rotary compressor Download PDFInfo
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- CN114810604B CN114810604B CN202210505862.4A CN202210505862A CN114810604B CN 114810604 B CN114810604 B CN 114810604B CN 202210505862 A CN202210505862 A CN 202210505862A CN 114810604 B CN114810604 B CN 114810604B
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- 239000012530 fluid Substances 0.000 title claims abstract description 123
- 230000007246 mechanism Effects 0.000 title claims abstract description 24
- 230000009471 action Effects 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 135
- 239000010687 lubricating oil Substances 0.000 claims description 15
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000005086 pumping Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000002301 combined effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/028—Means for improving or restricting lubricant flow
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a fluid control assembly, an oil supply control mechanism and a rotary compressor, wherein the fluid control assembly comprises a plurality of control pieces, a plurality of oil supply control pieces and a plurality of oil supply control pieces, wherein the control pieces are used for movably penetrating through the wall of a fluid passage in different radial directions at different circumferential positions of the fluid passage; the control piece comprises a head part and a tail part, the head part extends into the fluid channel to form a fluid control surface, and the tail part is used for extending out of the fluid channel to form a feedback action surface; when the force acting on the feedback acting surface of the control member is changed, the control member can be moved relative to the wall of the fluid passage, so that the distance of the head part extending into or withdrawing from the fluid passage is changed; the flow area of the fluid passage defined by the closed annular flow control surfaces is minimized when the plurality of control members are moved to positions where the flow control surfaces circumferentially surround a closed annular flow control surface. Throttling is achieved by providing a flow control assembly and varying the flow area of the fluid passage during movement of the plurality of control members in a radial direction of the fluid passage.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a fluid control assembly, an oil supply control mechanism and a rotary compressor.
Background
Rotary compressors, also known as rolling rotor compressors, have been widely used in refrigeration/heat pump systems in the fields of air conditioners, dehumidifiers, refrigerators, heating, automobiles, and the like. The rotor compressors in these fields can be further classified into conventional speed compressors, high speed compressors, and high speed compressor systems are often proposed to achieve energy saving and high efficiency, or multi-functional combined effects. Compared with a conventional rotating speed compressor, the high-speed compressor has the advantages of rapid refrigeration, high heating capacity, simplicity, compactness, concentrated energy consumption, reduction of equipment cost and the like. Compared with a conventional rotating speed compressor, the high-speed compressor with the same displacement and the same series can have higher refrigerating capacity, and the high-speed compressor is easier to realize that the motor runs at a high-efficiency rotating speed and realizes high speed and high efficiency. However, a larger amount of oil is supplied with the high speed operation of the compressor, and the excessive amount of oil affects the compressor energy efficiency.
Disclosure of Invention
In view of this, the present invention provides a fluid control assembly, an oil supply control mechanism and a rotary compressor, which are at least used for solving the technical problem in the prior art that the oil pumping amount of the compressor is large under high-speed operation, and specifically:
a first aspect of the invention provides a fluid control assembly for a fluid passageway, the fluid control assembly comprising a plurality of control members; a plurality of the control members are movably arranged on the wall of the fluid passage in different radial directions at different circumferential positions of the fluid passage; each control member comprises a head part and a tail part, the head part is used for extending into the fluid channel to form a fluid control surface, and the tail part is used for extending out of the fluid channel to form a feedback action surface; when the force acting on the feedback acting surface of the control member is changed, the control member can be moved relative to the wall of the fluid passage, and the distance of the head part extending into or out of the fluid passage is changed; when the distance of the head part extending into or out of the fluid channel is changed, the flow area of the fluid channel is changed; the flow area of the fluid passage defined by the closed annular flow control surfaces is minimized when the control members are moved to positions where the flow control surfaces circumferentially surround a closed annular flow control surface.
Further optionally, the control member further comprises a connecting portion connected between the head portion and the tail portion, the connecting portion being used for penetrating the control member on the fluid passage.
Further optionally, the head of the control member comprises a top surface, a bottom surface, and left and right side surfaces and front and rear side surfaces arranged in pairs between the top surface and the bottom surface; wherein the top surface is connected with the connecting portion; said bottom surface forming said fluid control surface; the fluid control surfaces of the control members are distributed circumferentially, and the opposite side surfaces of every two adjacent control members are provided with adaptive shapes; when the fluid control surfaces of the control members move in the converging direction, the closed annular fluid control surface is formed, the left side surface and the right side surface of every two adjacent control members are abutted together, and the front side surface and the rear side surface of the control members on the fluid side facing the channel are positioned on the same plane.
Further optionally, the bottom surface of the control member is an arc surface with the same circle center and the same radian.
Further optionally, when the plurality of control members are moved to a first predetermined position nearest to the center of the flow channel, the flow area formed is a minimum, being the closed annular flow control surface; when the control pieces move to a second preset position which is farthest away from the center of the fluid channel, the formed flow area is the largest and is a flow surface with a radial gap.
Further optionally, the central axes of the plurality of control members extend along different radial directions of the fluid passage and have a common intersection point; the intersection coincides with the center of the fluid channel; the fluid control surfaces of the control pieces have the same radian and are uniformly distributed in the same circumferential direction by taking the intersection point as the center of a circle.
The invention provides an oil supply control mechanism for a compressor, which comprises the fluid control assembly provided by the first aspect, wherein the fluid control assembly is arranged at the lower part of a compressor rotor, an oil supply channel is formed in the compressor rotor, and the oil supply control mechanism adjusts the flow area of the oil supply channel of the compressor rotor according to the rotating speed of the rotor.
Further optionally, the fluid control assembly adaptively adjusts the flow area of the compressor rotor oil supply channel according to the compressor rotation speed in a negative feedback manner, that is: the fluid control assembly reduces a flow area of an oil supply passage of the rotor when a rotational speed of the rotor increases.
Further optionally, a first cylinder is arranged at the lower part of the rotor; a first cylinder cavity is formed in the first cylinder body, an oil outlet of the first cylinder cavity is communicated with an oil supply channel inlet of the rotor, and an oil inlet of the first cylinder cavity is communicated with a pump oil port of the rotor; the oil supply control mechanism also comprises a second cylinder body sleeved on the outer peripheral side of the first cylinder body; an oil cavity is formed between the inner wall of the second cylinder body and the outer wall of the first cylinder body, and the oil cavity is also communicated with a pump oil port of the rotor; the control pieces are movably arranged on the first cylinder body in different radial directions at different circumferential positions of the first cylinder cavity in a penetrating mode; and the head of the control piece extends into the first cylinder cavity to form the fluid control surface, and the tail of the control piece extends into the oil cavity to form the feedback action surface. When the rotating speed of the rotor is increased, the amount of the lubricating oil pumped into the oil cavity is increased, the oil pressure generated on the feedback acting surface of the control piece is increased, and when the pressure difference is larger than the centrifugal force of the control piece at the rotating speed, the control pieces move in a converging manner towards the axis direction of the first cylinder cavity, so that the flow area of the oil supply channel is reduced.
Further optionally, the first cylinder has a channel formed thereon corresponding to the plurality of control members; when the control members converge toward the axial direction of the first cylinder chamber under the oil pressure of the oil chamber, the control members slide along the corresponding channels.
The third aspect of the invention provides a rotary compressor, the compressor is provided with the oil supply control mechanism of the third aspect, the bottom of the rotor is provided with an oil pool, and the oil pumping port of the rotor is communicated with the oil pool.
According to the invention, the fluid control assembly is arranged at the lower part of the compressor rotor, so that the fluid control assembly can change the flow area of the oil supply channel according to the rotating speed of the rotor, and particularly, when the rotating speed of the rotor is higher, the flow area of the oil supply channel is smaller, thus the oil pumping quantity is reduced, the phenomenon that the energy efficiency of the compressor is influenced by the overhigh oil pumping quantity in the high-speed operation process of the compressor is avoided, and the operation stability of the compressor can be ensured by arranging the fluid control assembly.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely some embodiments of the present disclosure, and other drawings may be derived from those drawings by those of ordinary skill in the art without inventive effort.
Fig. 1 is a schematic view showing a structure of a compressor in the related art;
FIG. 2 is a schematic view showing a structure of a compressor in the embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the open state of a control member in an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the closed state of the control member in an embodiment of the present invention;
FIG. 5 shows a schematic structural view of an oil pumping assembly in an embodiment of the present invention;
fig. 6 is a schematic view showing a structure of the compressor in the embodiment of the present invention when the compressor is operated at a high speed.
FIG. 7 shows one of the schematic structural views of a control member in an embodiment of the present invention;
FIG. 8 is a second schematic structural view of a control member according to an embodiment of the present invention;
fig. 9 is a third schematic structural diagram of a control member according to an embodiment of the present invention.
In the figure:
2 oil supply control mechanism, 21 second cylinder;
3 compressor, 31 first cylinder, 31a channel, 32 pump oil assembly, 33 crankshaft;
3, compressor, 33, crankshaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrases "comprising one of \8230;" does not exclude the presence of additional like elements in an article or system comprising the element.
Example 1:
in a first aspect, the present invention provides a fluid control assembly for a fluid passage, comprising a plurality of control members 1, wherein the control members 1 are movably arranged in different radial directions on the wall of the fluid passage at different axial positions of the fluid passage. Each control member 1 comprises a head portion 11 and a tail portion 12, the head portion 11 extends into the fluid channel to form a fluid control surface 14, and the tail portion 12 is used for extending out of the fluid channel to form a feedback action surface 15; when the force acting on the feedback surface 15 of the control member 1 changes, the control member 1 is caused to move relative to the wall of the fluid passage, and the distance the head 11 extends into or out of the fluid passage changes; when the control elements 1 are moved to such an extent that their flow control surfaces 14 enclose a closed annular flow control surface 14 in the circumferential direction, the flow area of the flow channel defined by the closed annular flow control surface 14 is at a minimum.
In particular, the change of the flow area is achieved by different movement positions of the control element 1. The fluid control assembly comprises the control part 1, namely, the throttling function is realized by a plurality of control parts 1 together, and the control part 1 is arranged on the pipe wall of the fluid passage in a penetrating way and can move along the position close to or far from the center of the passage, and it can be understood that when a plurality of control parts 1 move along the circumferential position of the fluid passage and the radial position of the fluid passage.
As shown in fig. 7, 8 and 9, the control member 1 includes a head portion 11 and a tail portion 12, wherein the head portion 11 is located in the fluid passage, and the head portion 11 is formed with a fluid control surface 14, and the tail portion 12 is located outside the fluid passage, and a feedback action surface 15 is formed at the tail portion 12. The control member 1 is radially displaceable along the flow passage in response to a change in the force acting on the feedback surface 15 of the trailing portion 12 of the control member 1, and the head portion 11 located in the flow passage changes in relation to the centre position of the flow passage during the radial displacement of the control member 1 along the flow passage.
Wherein, when the acting force acting on the tail part of the control member 1 changes, the control member 1 can move along the radial direction of the fluid channel, that is, under different acting forces, the radial movement displacement of the control member 1 along the fluid channel is different.
When the control elements 1 are moved to such an extent that their mutual heads 11 abut against each other and form a closed annular flow control surface 14, the fluid flows through the annular throttling surface, which has the smallest flow area in the fluid passage, so that the throttling effect is achieved.
It should be noted that the passage assembly provided in this embodiment may include many different types, and may be used in different applications where throttling is required. Wherein the flow-through passage may be a different type of flow-through, such as a lubrication passage of a compressor. For example, in a compressor, an oil supply passage for lubricating oil may be provided inside the rotor, so that the change in the area of the fluid passage is achieved by the movement of the control member 1. When the pressure of the lubricating oil in the rotor is different, different pressures act on the tail part 12 of the control part 1, so that the control part 1 moves to different positions along the radial direction of the rotor, and the control part 1 has a self-adaptive condition on the rotating speed of the rotor, namely the flow area is changed in a self-adaptive manner.
Preferably, in this embodiment, the control member 1 further includes a connecting portion 13 connected between the head portion 11 and the tail portion 12, the connecting portion 13 is disposed on the fluid passage, that is, the connecting portion 13 penetrates through a wall of the fluid passage, an installation groove for moving the connecting portion 13 is opened on the wall of the fluid passage, the connecting portion 13 can move in the installation groove toward or away from a central position of the fluid passage, and when the connecting portion 13 moves closest to the central position of the fluid passage, the head portions 11 of the plurality of control members 1 can form a closed annular acting surface in a circumferential direction, at which a flow area of the fluid passage is minimum.
Preferably, in the present embodiment, the head portion 11 of the control member 1 includes a top surface and a bottom surface, and two opposite left and right sides and front and rear sides provided between the top surface and the bottom surface. Wherein the top surface is connected to the connection part 13, and when the connection part 13 moves to the farthest distance from the fluid channel, part of the top surface abuts against the fluid channel, and the bottom surface opposite to the top surface forms a fluid control surface 14, and when the bottom surfaces of the control members 1 are connected, the bottom surfaces form a closed ring shape, so that a throttling effect is achieved.
Specifically, the top surface and the bottom surface are also provided with a left side surface, a right side surface, a front side surface and a rear side surface in front, wherein the left side surface and the right side surface are oppositely arranged, and the front side surface and the rear side surface are oppositely arranged. The left side and the right side are sides located at left and right positions, the front side and the rear side are sides located in the front and rear directions, when the control pieces 1 move in the direction of converging throttling and the control pieces 1 abut against each other to form a closed annular throttling surface, the adjacent left side and the right side abut against each other, and meanwhile, the shapes of the left side and the right side opposite to the control pieces 1 are the same, so that when the control pieces 1 abut against each other, a closed throttling channel can be formed better, meanwhile, when the left side and the right side abut against each other, the front side and the rear side opposite to each other among the control pieces 1 can be connected together, and are located on the same plane to form an annular plane together.
Preferably, in the present embodiment, the bottom surfaces of the plurality of control members 1 have the same curvature, so that when the plurality of bottom surfaces are enclosed together, an annular throttle passage can be formed. The left and right side surfaces and the front and rear side surfaces are planes.
Specifically, when the control pieces 1 abut against each other to form the annular throttling channel, the left side face and the right side face can be tightly matched together, the phenomenon that liquid leakage occurs at a gap with poor matching due to poor matching is avoided, and therefore the sealing effect is guaranteed. And a plurality of bottom surfaces can enclose a circular flow channel together, thereby better realizing the throttling effect.
Preferably, in the present embodiment, the plurality of control members 1 includes a first preset position and a second preset position, wherein the first preset position is a position in which the control member 1 moves toward the center of the fluid passage to a position closest to the center of the fluid passage, that is, a position in which the plurality of control members 1 can form an annular throttle surface with a smallest flow area. The second preset position is a position opposite to the first preset position, when the control member 1 is located at the second preset position, the farthest distance from the center position of the fluid passage of the control member 1 is the second preset position, and the flow area is the largest at the moment. When the control pieces 1 move from the second preset position to the first preset position, the flow area is gradually reduced until the control pieces 1 move to the first preset position, and the throttle area is the minimum at the moment and the flow area is provided with a radial gap.
The control pieces 1 are installed on the fluid passage, the control pieces 1 are in an axisymmetric shape, the central axes of the control pieces 1 are along different radial directions of the fluid passage, and the central axes of the control pieces 1 intersect at the center of the fluid passage, that is, the control pieces 1 are equidistantly arranged along the circumferential direction of the fluid passage, meanwhile, the fluid control surfaces 14 have the same radian and are distributed in the circumferential direction, and by arranging the control pieces 1 equidistantly arranged in the circumferential direction, each control piece 1 can be uniformly stressed in the throttling process, and the throttling effect is better realized.
Example 2:
in a second aspect, an embodiment of the present invention provides an oil supply control mechanism 2, which includes the fluid control assembly described in embodiment 1, and therefore has all the beneficial technical effects of the fluid control assembly provided in embodiment 1, and details are not repeated herein.
Preferably, in the present embodiment, the oil supply control mechanism 2 is disposed in the compressor, specifically, at the lower part of the rotor, and is connected with the rotor. An oil supply channel is formed in the rotor, and the flow area of the oil supply channel of the rotor is adjusted through the rotating speed of the rotor. It can be understood that the rotor is connected to the crankshaft 33, the crankshaft 33 drives the rotor to rotate all the time during the operation of the compressor, that is, the rotor has different rotation speeds, for example, high-speed rotation and low-speed rotation, and the oil supply control mechanism 2 is connected to the rotor and adjusts the flow area of the oil supply passage of the rotor through the rotation speed, so as to be capable of adapting to the flow area of the oil supply passage needed by the compressor at different rotation speeds.
Specifically, the flow control assembly adaptively adjusts the flow area of the oil supply channel of the compressor according to the rotating speed of the compressor in a negative feedback mode, namely, the flow area of the oil supply channel is smaller when the rotating speed of the rotor is higher.
It can be understood that, in the rotor compressor, there is often a problem that the amount of oil pumped is large during high-speed operation, and an excessively large amount of oil pumped will affect the amount of oil discharged from the compressor and the energy efficiency of the compressor, and it is also possible that lubricating oil enters the system to affect the heat exchange of the heat exchanger to generate a negative effect. Therefore, by providing the oil supply control mechanism 2 in the compressor, the amount of oil pumped can be relatively reduced during high-speed operation of the compressor, and the energy efficiency of the compressor can be ensured.
Preferably, in this embodiment, a first cylinder block 31 is disposed at a lower portion of the rotor, a first cylinder chamber is formed in the first cylinder block 31, and an oil outlet of the first cylinder chamber is communicated with an inlet of an oil supply channel of the compressor, so that in a loop path, lubricating oil passes through the first cylinder chamber and then passes through the oil supply channel of the compressor, and is communicated with a pump oil port of the rotor through an oil inlet of the first cylinder chamber, thereby implementing that the lubricating oil passes through the first cylinder chamber from an oil sump and then is conducted from the inside of the rotor to the oil supply channel of the compressor.
Specifically, the oil supply control mechanism 2 further comprises a second cylinder 21, the second cylinder 21 is sleeved outside the first cylinder 31, an oil cavity is formed between the second cylinder 21 and the inner wall of the first cylinder 31, the oil cavity is communicated with the pump oil port of the rotor, and oil in the oil cavity can enter the oil cavity. The plurality of fluid restrictions are provided at circumferential positions of the first cylinder 31, and the plurality of fluid restrictions are provided so as to penetrate through the wall thickness of the first cylinder 31 and are movable toward or away from a center position of the first cylinder 31, that is, in a radial direction of the first cylinder 31.
It can be understood that, when the rotation speed of the rotor is higher, the oil amount of the lubricating oil pumped into the oil cavity is increased, after the lubricating oil enters the oil cavity, the oil pressure acting on the feedback acting surface 15 at the tail part 12 of the control part 1 is increased, and when the pressure difference is greater than the centrifugal force of the control part 1 at the rotation speed, the control parts 1 are converged towards the center direction of the first cylinder body 31, so that the head parts 11 of the control parts 1 are converged together to form a throttling channel, and the flow area of the oil supply channel is reduced.
Specifically, as shown in fig. 5 and 6, an oil pumping assembly 32 is further disposed inside the compressor, the oil pumping assembly 32 is provided with a connector connected to the rotor, the oil pumping assembly 32 is disposed on the upper portion of the oil pool, and the lubricating oil in the oil pool is pumped to the compressor through the oil pumping assembly 32, wherein two oil pumping flows of the oil pumping assembly 32 are provided, one oil pumping flow is used for pumping the lubricating oil to a first cavity inside the rotor and communicated with the oil supply channel through the oil pumping assembly 32, and the other oil pumping flow is used for communicating an oil cavity between the inner wall of the second cylinder 21 and the outer wall of the first cylinder 31 through the oil pumping assembly 32.
It can be understood that the oil pump assembly 32 is provided with an inner ring and an outer ring. Specifically, the upper end of the rotor is connected with the short shaft of the crankshaft 33, the connector drives the inner ring and the outer ring of the oil pump to pressurize the lubricating oil under the driving of the crankshaft 33, the pressurized lubricating oil enters the oil cavity between the inner wall of the second cylinder 21 and the outer wall of the first cylinder 31, and the high-pressure oil enters the oil cavity through the oil inlet of the oil cavity, specifically, the oil cavity is an annular oil cavity.
In fig. 6, the black part is a flow path of the lubricant.
As shown in fig. 9, the areas of the head 11 and the tail 12 of the throttle body contacting with the lubricating oil are different, the effective area S1 of the left tail 12 is subjected to a force Fa, the effective area S2 of the right head 11 is subjected to a force Fb, and the liquid pressures are the same, and when the compressor is in normal operation, the resultant force F of the liquid pressures is directed in the axial direction along the radial direction, wherein the resultant force F of the liquid pressures here is the above-mentioned pressure difference, that is, F = Fa-Fb. Centrifugal force F Separating from Direction along radial direction and back to axial center direction, centrifugal force F at low frequency Separating from F, the control member 1 is moved radially outward of the first cylinder 31 by centrifugal force, as shown in fig. 3, and the fluid control assembly is in an open state. When the compressor reaches a certain rotating speed and runs at high speed, the resultant force F under the pressure of liquid points to the axial center along the radial direction, the centrifugal force direction is opposite to the axial center along the radial direction, and F is at high speed Separating from < F, the control member 1 is moved radially inwards of the rotor by the centrifugal force, as shown in figure 4, and the fluid control assembly is in a closed state.
The number of the control members 1 in fig. 3 and 4 is three, and in a specific application, the number of the control members 1 is not specifically limited and can be flexibly set, and the number can be adaptively adjusted according to the size of a rotor and the use working condition of the compressor.
Preferably, in the present embodiment, the first cylinder 31 is provided with a channel 31a corresponding to the control member 1, and specifically, the channel 31a is shaped to fit the tail portion 12 and the connecting portion 13 of the control member 1, so that the connecting portion 13 and the tail portion 12 can move in the channel 31a during the movement of the control member 1, and when the plurality of control members 1 are pushed and move toward the central position of the first cylinder 31 by the high-pressure lubricating oil in the oil chamber, the tail portion 12 and the connecting portion 13 of the control member 1 move in the channel 31 a.
Example 3
The invention provides a rotary compressor, which comprises an oil supply control mechanism 2 provided by embodiment 2, so that all beneficial technical effects of the oil supply control mechanism 2 in embodiment 2 are included, and details are not repeated herein.
Preferably, in this embodiment, the compressor is further provided with an oil sump, the oil sump is located at the bottom of the compressor, and the pump oil port of the rotor is communicated with the oil sump, through which oil is supplied to the compressor.
Wherein, fig. 1 is a schematic oil supply diagram in the related art, generally, the compressor 3 is immersed in an oil sump by a short shaft, and the crankshaft 33 rotates to pump oil upwards, and then the crankshaft 33 is used to pump oil into a position to be lubricated by an oil hole in the compressor.
And fig. 2 and 6 are schematic structural views of an internal oil passage of the rotary compressor 3 according to the present invention.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the disclosure is not limited to the precise construction, arrangements, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. A fluid control assembly disposed on a fluid passage,
the fluid control assembly comprises a plurality of control members (1); a plurality of control members (1) are movably arranged on the wall of the fluid passage in different radial directions at different circumferential positions of the fluid passage;
each control member (1) comprises a head part (11) and a tail part (12), the head part (11) is used for extending into the fluid channel to form a fluid control surface (14), and the tail part (12) is used for extending out of the fluid channel to form a feedback action surface (15);
when the force acting on the feedback acting surface of the control part (1) is changed, the control part (1) can be moved relative to the wall of the fluid passage, and the distance of the head part (11) extending into or out of the fluid passage is changed;
when the distance of the head (11) extending into or out of the fluid channel is changed, the flow area of the fluid channel is changed; -when the control elements (1) are moved to such an extent that their flow control surfaces (14) circumferentially enclose a closed annular flow control surface (14), the flow area of the flow channel defined by the closed annular flow control surface (14) is minimal;
the control part (1) further comprises a connecting part (13) connected between the head part (11) and the tail part (12), and the connecting part is used for penetrating the control part (1) on the fluid channel.
2. The fluid control assembly of claim 1,
the head (11) of the control part (1) comprises a top surface, a bottom surface and a side surface arranged between the top surface and the bottom surface in a surrounding way; wherein the top surface is connected to the connection portion; said bottom surface forming said fluid control surface (14);
the fluid control surfaces (14) of the plurality of control elements (1) are circumferentially distributed;
the opposite side surfaces of every two adjacent control members (1) have adaptive shapes;
the control elements (1) are located on the same plane on the side facing the direction of fluid inflow of the fluid channel.
3. The fluid control assembly of claim 2,
the bottom surfaces of the control pieces (1) are arc surfaces with the same circle center and the same radian.
4. The fluid control assembly of claim 3,
when the control members (1) are moved to a first preset position nearest to the center of the fluid passage, the formed flow area is the smallest and is the closed annular fluid control surface (14);
when the control pieces (1) move to a second preset position farthest away from the center of the fluid channel, the formed flow area is the largest and is a flow surface with a radial gap.
5. The fluid control assembly according to claim 1, wherein the central axes of a plurality of said control members (1) extend along different radial directions of said fluid passage and have a common intersection point; the intersection coincides with the center of the fluid channel; the fluid control surfaces (14) of the control pieces (1) have the same radian and are uniformly distributed in the same circumferential direction by taking the intersection point as the center of a circle.
6. An oil supply control mechanism for a compressor, characterized by being provided with the fluid control assembly as claimed in any one of claims 1 to 5; the fluid control assembly is arranged at the lower part of the compressor rotor, an oil supply channel is formed in the compressor rotor, and the oil supply control mechanism adjusts the flow area of the oil supply channel of the compressor rotor according to the rotating speed of the rotor.
7. The compression oil supply control mechanism according to claim 6,
the flow control assembly adjusts the flow area of an oil supply channel of a compressor rotor in a negative feedback mode in a self-adaptive mode according to the rotating speed of the compressor, namely: the fluid control assembly reduces a flow area of an oil supply passage of the rotor when a rotational speed of the rotor increases.
8. The oil supply control mechanism (2) according to claim 7,
the lower part of the rotor is provided with a first cylinder body (31); a first cylinder cavity is formed in the first cylinder body (31), an oil outlet of the first cylinder cavity is communicated with an oil supply channel inlet of the rotor, and an oil inlet of the first cylinder cavity is communicated with a pump oil port of the rotor;
the oil supply control mechanism (2) further comprises a second cylinder body (21) sleeved on the outer peripheral side of the first cylinder body (31); an oil cavity is formed between the inner wall of the second cylinder body (21) and the outer wall of the first cylinder body (31), and the oil cavity is also communicated with a pump oil port of the rotor;
the control pieces (1) are movably arranged on the first cylinder body (31) in different radial directions at different circumferential positions of the first cylinder cavity in a penetrating mode; the head (11) of the control part (1) extends into the first cylinder cavity to form the fluid control surface (14), and the tail (12) thereof extends into the oil cavity to form the feedback action surface (15);
when the rotating speed of the rotor is increased, the amount of the lubricating oil pumped into the oil cavity is increased, the oil pressure generated on a feedback acting surface (15) of the control piece (1) is increased, and when the pressure difference is larger than the centrifugal force of the control piece (1) at the rotating speed, the control pieces (1) converge towards the axis direction of the first cylinder cavity to move, so that the flow area of the oil supply channel is reduced.
9. The oil supply control mechanism (2) according to claim 8,
the first cylinder (31) is formed with a channel (31 a) corresponding to the plurality of control members (1); when the control pieces (1) are subjected to converging movement in the axial direction of the first cylinder chamber under the action of oil pressure of the oil chamber, the control pieces (1) slide along the corresponding channel (31 a).
10. A rotary compressor, characterized in that the compressor (3) is provided with the oil supply control mechanism (2) of any one of claims 6 to 9, and the bottom of the rotor is provided with an oil sump, and the pump oil port of the rotor is communicated with the oil sump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210505862.4A CN114810604B (en) | 2022-05-10 | 2022-05-10 | Fluid control assembly, oil supply control mechanism and rotary compressor |
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| CN202210505862.4A CN114810604B (en) | 2022-05-10 | 2022-05-10 | Fluid control assembly, oil supply control mechanism and rotary compressor |
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| CN114810604A CN114810604A (en) | 2022-07-29 |
| CN114810604B true CN114810604B (en) | 2023-03-31 |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0713516B2 (en) * | 1986-02-25 | 1995-02-15 | 松下冷機株式会社 | Scroll type compressor |
| JP2583944B2 (en) * | 1988-02-26 | 1997-02-19 | 松下冷機株式会社 | Compressor |
| JPH08200253A (en) * | 1995-01-30 | 1996-08-06 | Sanyo Electric Co Ltd | Scroll compressor |
| KR200147711Y1 (en) * | 1996-06-11 | 1999-06-15 | 윤종용 | Oil supply apparatus of an inverter compressor |
| KR100186465B1 (en) * | 1996-12-18 | 1999-05-01 | 구자홍 | Oil feeding device of a scroll compressor |
| CN105464989B (en) * | 2015-12-24 | 2018-03-23 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of fueller, there is its screw compressor and control method |
| CN111089057A (en) * | 2018-10-24 | 2020-05-01 | 艾默生环境优化技术(苏州)有限公司 | Oil supply mechanism for rotary machine and rotary machine |
| CN111946621A (en) * | 2020-09-14 | 2020-11-17 | 松下压缩机(大连)有限公司 | Oil supply mechanism of variable frequency compressor |
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