CN109026703B - Variable capacity pump body assembly and compressor with same - Google Patents
Variable capacity pump body assembly and compressor with same Download PDFInfo
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- CN109026703B CN109026703B CN201811069981.XA CN201811069981A CN109026703B CN 109026703 B CN109026703 B CN 109026703B CN 201811069981 A CN201811069981 A CN 201811069981A CN 109026703 B CN109026703 B CN 109026703B
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- sliding vane
- cavity
- assembly
- accommodating cavity
- pump body
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- 238000007906 compression Methods 0.000 claims abstract description 48
- 230000006835 compression Effects 0.000 claims abstract description 45
- 238000004891 communication Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 16
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000006872 improvement Effects 0.000 description 4
- 230000000737 periodic effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
- F04C18/3566—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along more than line or surface
-
- 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
-
- 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
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention provides a variable capacity pump body assembly and a compressor with the same, which solves the technical problems that a single compressor cylinder in the prior art can not improve the energy efficiency of the compressor according to load change, and the technical scheme comprises the following steps: a pump body assembly, comprising: the cylinder assembly is provided with a second exhaust port communicated with the sliding vane accommodating cavity, and the first end and the second end are respectively communicated with the sliding vane accommodating cavity and the low-pressure cavity. According to the invention, the new compression cavity formed by the sliding vane accommodating cavity can be unloaded or loaded according to the requirement of the pump body working load, so that the variable capacity operation of a single cylinder body is realized, and the energy of the compressor is improved.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a variable capacity pump body assembly and a compressor with the same.
Background
The rotary compressor is widely applied to household room air conditioners due to good refrigeration performance, small volume, simple structure and high reliability, and the air conditioners with high performance, low noise, safety and electricity saving are increasingly popular with people along with the progress of technology and continuous rising of energy prices. A significant portion of the improvement in air conditioner efficiency is in the compressor. The improvement of compressor efficiency and the production of high efficiency compressors has become one of the main means of product competition for all compressor manufacturers at present.
The existing rotary compressor mainly comprises a shell, a pump body assembly, a motor assembly and an oil pool. A stator cavity is formed between a stator of the motor assembly, the shell and the pump body assembly, wherein the upper space of the stator is a motor upper cavity, and the lower space of the stator is a motor lower cavity. The pump body assembly mainly comprises a cylinder, a crankshaft, rollers and a sliding vane assembly. The upper end and the lower end of the cylinder are respectively provided with an upper flange and a lower flange which form a closed volume in the cylinder, the sliding vane assembly is limited in a sliding vane groove on the wall of the cylinder, the roller rotates in the cylinder cavity along the cavity wall of the cylinder, the sliding vane is tightly attached to the roller under the action of the spring so as to divide the cylinder cavity into an air suction cavity and a compression cavity, and the sliding vane moves in a straight reciprocating mode along with the rotation of the roller, so that the rotary compressor completes the air suction, compression and exhaust process.
In the prior art, a compressor pump body is a single-cylinder compressor or a multi-cylinder compressor, generally one cylinder is provided with only one compression cavity, and particularly the single-cylinder compressor cannot improve the energy efficiency of the compressor through capacity variation when the working load of the compressor changes.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the technical defect that a single compressor cylinder in the prior art cannot improve the compressor energy according to load change, so as to provide a variable capacity pump body assembly and a compressor with the same.
In order to achieve the above object, the present invention adopts the technical scheme that:
a variable capacity pump body assembly comprising: the cylinder assembly is provided with an inner cavity, and a sliding vane accommodating cavity is formed in the inner wall of the inner cavity; the eccentric rotating assembly is arranged in the inner cavity; the sliding vane assembly is arranged in the sliding vane accommodating cavity and comprises a sliding vane, the head of the sliding vane is kept in contact with the eccentric rotating assembly, and the sliding vane divides the inner cavity into a high-pressure cavity with an exhaust port and a low-pressure cavity with an air suction port; a second air suction port is additionally arranged on the side wall of the sliding vane facing the low-pressure cavity; the cylinder assembly is provided with a second exhaust port communicated with the sliding vane accommodating cavity, and an exhaust valve assembly is arranged at the second exhaust port; the controllable valve assembly comprises a first end communicated with the sliding vane accommodating cavity, a second end communicated with the low-pressure cavity and a valve which is arranged between the first end and the second end and can control the on-off of the first end and the second end; when loading and capacity increasing are carried out, the controllable valve component cuts off the communication between the first end and the second end, and the sliding vane accommodating cavity is closed; when the sliding vane extends out of the sliding vane accommodating cavity to the position where the second air suction port is partially exposed, the second air suction port communicates the low-pressure cavity with the sliding vane accommodating cavity; when the eccentric rotating assembly drives the sliding vane to retract to the position that the second air suction port is completely positioned in the sliding vane accommodating cavity, the communication between the low-pressure cavity and the sliding vane accommodating cavity is cut off, the second air suction port, the sliding vane accommodating cavity and the second air exhaust port form an additional compression cavity, and low-pressure gas in the sliding vane accommodating cavity is compressed along with the continuous retraction of the sliding vane to form high-pressure gas until reaching the drainage pressure for opening the exhaust valve assembly, and the high-pressure gas is exhausted through the second air exhaust port; when the sliding vane is unloaded and the volume is reduced, the controllable valve component is communicated with the first end and the second end, the sliding vane accommodating cavity is communicated with the low-pressure cavity, low-pressure gas in the sliding vane accommodating cavity continuously retracts along with the sliding vane, and flows back into the low-pressure cavity through the sliding vane accommodating cavity and the controllable valve component.
The cylinder assembly includes: the inner wall of the cylinder is provided with a sliding vane groove; the first end sealing piece and the second end sealing piece are arranged at two axial ends of the air cylinder, and the inner cavity is defined by the first end sealing piece and the air cylinder, and the sliding piece accommodating cavity is defined by the first end sealing piece and the second end sealing piece and the sliding piece groove.
The trailing end of the sliding vane groove is communicated with the first end of the controllable valve component.
The second end of the controllable valve assembly is in communication with the suction port.
The valve comprises a controllable solenoid valve.
The control output end of the management circuit is connected with the valve controlled end in the controllable valve assembly.
The second exhaust port is disposed on the first end seal.
The high pressure chamber side exhaust port is disposed on the first end seal.
The slider assembly further comprises: and the elastic piece is arranged in the sliding piece accommodating cavity, and the biasing force of the elastic piece acts on the sliding piece to enable the sliding piece to keep contact with the outer circumferential surface of the eccentric rotating assembly.
The slip sheet includes: the sliding vane body, sliding vane body afterbody is equipped with spacing portion, the flexible free end of elastic component with spacing portion connects.
The limiting part is a groove, and the telescopic free end of the elastic piece is arranged in the groove.
The tail end of the second air suction port is communicated with the groove.
The second air suction port is a strip-shaped long groove which is arranged along the extending or retracting direction of the sliding sheet in the length direction.
Setting the eccentric amount of the eccentric rotating assembly as e, setting the distance between the head of the second air suction port and the head of the sliding blade as X, and when the sliding blade stretches out of the sliding blade accommodating cavity to be longest, setting the dimension of the second air suction port, which is exposed out of the sliding blade accommodating cavity side and is along the extending or retracting direction of the sliding blade, as H, wherein H=2e-X is satisfied.
The value range of H is 0.1-0.2 mm.
The air suction port is arranged on the inner cavity wall of the air cylinder.
The eccentric rotation assembly includes: a crankshaft extending through the cylinder assembly and having an eccentric portion thereon; the roller is sleeved on the eccentric part.
The sliding vane groove is a through cavity formed on the air cylinder.
A compressor comprising a pump body assembly according to any one of the preceding claims.
The technical scheme of the invention has the following advantages:
1. the invention provides a pump body assembly, comprising: the cylinder assembly is provided with an inner cavity, and a sliding vane accommodating cavity is formed in the inner wall of the inner cavity; the eccentric rotating assembly is arranged in the inner cavity; the sliding vane assembly is arranged in the sliding vane accommodating cavity and comprises a sliding vane, the head of the sliding vane is kept in contact with the eccentric rotating assembly, and the sliding vane divides the inner cavity into a high-pressure cavity with an exhaust port and a low-pressure cavity with an air suction port; a second air suction port is additionally arranged on the side wall of the sliding vane facing the low-pressure cavity; the cylinder assembly is provided with a second exhaust port communicated with the sliding vane accommodating cavity, and an exhaust valve assembly is arranged at the second exhaust port; the controllable valve assembly comprises a first end communicated with the tail end of the sliding vane accommodating cavity, a second end communicated with the low-pressure cavity and a valve which is arranged between the first end and the second end and can control the on-off of the first end and the second end.
The above structure is the core structure of the present invention, which serves as the structural basis for implementing the loading or unloading of a new compression chamber. For ease of understanding, the volume increases and decreases, and by "volume" is meant the effective compression volume of the cylinder, not the natural volume of the cylinder in its inactive state.
When the pump body work load is higher, the new compression cavity formed by the sliding vane accommodating cavity needs to be loaded to realize capacity expansion so as to improve energy efficiency, and the specific steps comprise: the controllable valve component is used for switching off the communication between the first end and the second end, the sliding vane accommodating cavity is closed, and the sliding vane accommodating cavity is loaded to form a new compression cavity, so that the capacity expansion of the air cylinder is realized. After capacity expansion, the specific working process of the new compression cavity is as follows: when the sliding vane extends out of the sliding vane accommodating cavity to the position where the second air suction port is partially exposed, the second air suction port communicates the low-pressure cavity with the sliding vane accommodating cavity; when the eccentric rotating assembly drives the sliding vane to retract to the position that the second air suction port is completely positioned in the sliding vane accommodating cavity, the communication between the low-pressure cavity and the sliding vane accommodating cavity is cut off, the second air suction port, the sliding vane accommodating cavity and the second air exhaust port form an additional compression cavity, and low-pressure gas in the sliding vane accommodating cavity is compressed along with the continuous retraction of the sliding vane to form high-pressure gas until reaching the drainage pressure for opening the exhaust valve assembly, and is exhausted through the second air exhaust port.
When the pump body work load is lower, no extra slide sheet accommodating cavity space is needed to be additionally loaded, and a new compression cavity is needed to be unloaded at the moment so as to improve the energy efficiency, and the specific steps comprise: the controllable valve component is communicated with the first end and the second end, the sliding vane accommodating cavity is communicated with the low-pressure cavity, low-pressure gas entering the sliding vane accommodating cavity through the second air suction port continuously retracts along with the sliding vane, and flows back to the low-pressure cavity through the sliding vane accommodating cavity and the controllable valve component without being compressed, so that a new compression cavity cannot be formed in the sliding vane accommodating cavity, and the operation of compressing the gas is not participated, thereby achieving the purpose of unloading the new compression cavity for volume reduction.
The tail part of the accommodating cavity of the sliding vane of the air cylinder is connected with a controllable valve assembly, when the controllable valve assembly is closed, a closed space is formed, and a second air suction port which can communicate the closed space with the low pressure cavity is arranged on the side of the sliding vane facing the low pressure cavity. Along with the periodic reciprocating motion of the sliding vane, air enters the airtight space through the second air suction port, when the second air suction port is closed along with the retraction of the sliding vane, the sliding vane compressed air forms high-pressure air, and when the discharge pressure of the opening of the exhaust valve assembly is reached, the air is discharged through the second air discharge port, so that the periodic air suction, compression and exhaust processes of the sliding vane tail space are realized, and the compression volume is increased. When the controllable valve component is opened, the tail part of the sliding vane accommodating cavity is connected with the low-pressure cavity to form a passage, the pressure is balanced, the sliding vane accommodating cavity is not sealed at the moment, the compression process is not carried out, and the whole compression volume is reduced at the moment. According to the invention, the new compression cavity formed by the sliding vane accommodating cavity can be unloaded or loaded according to the requirement of the pump body working load, the variable capacity operation of a single cylinder body is realized, and the energy of the compressor is improved.
2. The pump body component comprises a controllable electromagnetic valve, a management circuit which is suitable for controlling the off or on state of the controllable valve component is arranged in the pump body component in a matching way, the control output end of the management circuit is connected with the valve controlled end in the controllable valve component, and the valve is opened or closed according to the control instruction of the management circuit.
3. According to the pump body assembly provided by the invention, the tail end of the sliding vane groove is open in the prior art, in the invention, the first end of the controllable valve assembly can be directly communicated with the tail end of the sliding vane groove, the tail end of the sliding vane groove can also be closed, a connecting hole is additionally formed in the first end sealing piece or the second end sealing piece at the position corresponding to the sliding vane groove, and the first end of the controllable valve assembly is communicated with the connecting hole. This embodiment preferably employs a controllable valve assembly in communication with the trailing end of the slider groove. The design of the new compression cavity can be realized without making more improvements to the existing sliding vane groove structure, and the structure is simple and easy to realize.
4. The second end of the controllable valve component is communicated with the low-pressure cavity, and can be communicated with the low-pressure cavity through the air suction port 12, or additionally provided with a vent hole on the cylinder wall, so that the second end of the controllable valve component is preferably communicated with the air suction port 12, and the pump body component is simple in structure and easy to realize.
5. According to the pump body assembly provided by the invention, the eccentric amount of the eccentric rotating assembly is set as e, the distance between the head of the second air suction port and the head of the sliding vane is set as X, when the sliding vane extends out of the sliding vane accommodating cavity to the longest extent, the dimension of the second air suction port, which is exposed out of the sliding vane accommodating cavity side, along the extending or retracting direction of the sliding vane is set as H, and H=2e-X is met. The value range of H is 0.1-0.2 mm. The second air suction port gradually exposes the sliding vane accommodating cavity along with the action that the sliding vane extends out of the sliding vane accommodating cavity, the size of the exposed sliding vane accommodating cavity cannot be too large or too small, and the exposed size range of the second air suction port needs to be reasonably set.
6. The compressor provided by the invention comprises the pump body assembly, and has all the advantages of the pump body assembly.
In summary, the invention effectively utilizes the space of the cylinder sliding vane accommodating cavity by controlling the opening and closing of the control channel of the cylinder sliding vane accommodating cavity, so that the loading and unloading of the new compression cavity are realized under different working conditions, and the capacity output according to the need is realized.
The present invention will be described in detail with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is an exploded view of a pump body assembly according to embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view of the pump body assembly of FIG. 1 taken along the radial direction of the cylinder (the controllable valve assembly is not shown);
reference numerals illustrate:
1-a cylinder; 11-a sliding vane groove; 111-a second exhaust port; 112-exhaust port; 12-air suction port; 13-a high pressure chamber; 14-a low pressure chamber; 15-a first end seal; 16-a second end seal; 2-a crankshaft; 31-sliding sheets; 311-a second suction port; 32-an elastic member; 4-a roller; 5-muffler.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Examples
A compressor is described that includes a variable capacity pump body assembly. The pump body component can be single-cylinder, double-cylinder or multi-cylinder.
As shown in fig. 1 and 2, the variable displacement pump body assembly in this embodiment includes: the cylinder assembly is provided with an inner cavity, and a sliding vane accommodating cavity is formed in the inner wall of the inner cavity; the eccentric rotating assembly is arranged in the inner cavity; the sliding vane assembly is arranged in the sliding vane accommodating cavity and comprises a sliding vane 31 with the head part kept in contact with the eccentric rotating assembly, and the sliding vane 31 divides the inner cavity into a high-pressure cavity 13 with an exhaust port 112 and a low-pressure cavity 14 with an air suction port 12; a second air suction port 311 is additionally arranged on the side wall of the sliding vane 31 facing the low-pressure cavity 14; the cylinder assembly is provided with a second exhaust port 111 communicated with the sliding vane accommodating cavity, and an exhaust valve assembly is arranged at the second exhaust port 111; the controllable valve assembly comprises a first end communicated with the sliding vane accommodating cavity, a second end communicated with the low-pressure cavity 14 and a valve which is arranged between the first end and the second end and can control the on-off of the first end and the second end.
The structure is a core structure of the invention and is used as a structural basis for loading or unloading a new compression cavity formed by the sliding vane accommodating cavity. For ease of understanding, the volume increases and decreases, and by "volume" is meant the effective compression volume of the cylinder, not the natural volume of the cylinder in its inactive state.
When the pump body work load is higher, the new compression cavity formed by the sliding vane accommodating cavity needs to be loaded to realize capacity expansion so as to improve energy efficiency, and the specific steps comprise: the controllable valve component is used for switching off the communication between the first end and the second end, the sliding vane accommodating cavity is closed, and the sliding vane accommodating cavity is loaded to form a new compression cavity, so that the capacity expansion of the air cylinder is realized. After capacity expansion, the specific working process of the new compression cavity is as follows: when the slide 31 extends out of the slide accommodating chamber to the second air suction port 311, the second air suction port 311 communicates the low pressure chamber 14 with the slide accommodating chamber; when the eccentric rotation assembly drives the sliding vane 31 to retract until the second air suction port 311 is completely positioned in the sliding vane accommodating cavity, the communication between the low pressure cavity 14 and the sliding vane accommodating cavity is cut off, the second air suction port 311, the sliding vane accommodating cavity and the second air exhaust port 111 form an additional compression cavity, and low pressure gas in the sliding vane accommodating cavity is compressed to form high pressure gas along with the continuous retraction of the sliding vane 31 until reaching the drainage pressure for opening the air exhaust valve assembly, and is exhausted through the second air exhaust port 111.
When the pump body work load is lower, no additional sliding vane accommodating cavity needs to be loaded, and a new compression cavity needs to be unloaded at the moment to improve the energy efficiency, and the specific steps comprise: the controllable valve assembly is communicated with the first end and the second end, the sliding vane accommodating cavity is communicated with the low-pressure cavity 14, low-pressure gas entering the sliding vane accommodating cavity through the second air suction port continuously retracts along with the sliding vane 31, flows back to the low-pressure cavity 14 through the sliding vane accommodating cavity and the controllable valve assembly and is not compressed, so that a new compression cavity cannot be formed in the sliding vane accommodating cavity, the operation of compressing the gas is not participated, and the purpose of unloading the new compression cavity for volume reduction is achieved.
The tail part of the accommodating cavity of the sliding vane of the air cylinder is connected with a controllable valve assembly, when the controllable valve assembly is closed, a closed space is formed, and a second air suction port which can communicate the closed space with the low pressure cavity is arranged on the side of the sliding vane facing the low pressure cavity. Along with the periodic reciprocating motion of the sliding vane, air enters the airtight space through the second air suction port, when the second air suction port is closed along with the retraction of the sliding vane, the sliding vane compressed air forms high-pressure air, and when the discharge pressure of the opening of the exhaust valve assembly is reached, the air is discharged through the second air discharge port, so that the periodic air suction, compression and exhaust processes of the sliding vane tail space are realized, and the compression volume is increased. When the controllable valve component is opened, the tail part of the sliding vane accommodating cavity is connected with the low-pressure cavity to form a passage, the pressure is balanced, the sliding vane accommodating cavity is not sealed at the moment, the compression process is not carried out, and the whole compression volume is reduced at the moment. According to the invention, the new compression cavity formed by the sliding vane accommodating cavity can be unloaded or loaded according to the requirement of the pump body working load, the variable capacity operation of a single cylinder body is realized, and the energy of the compressor is improved. In addition, the invention can fully utilize the space structure of the original sliding vane groove on the original cylinder structure by adding the second air suction port and the design of the second air exhaust port, can additionally increase the compression volume, improves the effective volume and the efficiency of the pump body, and has simple structure and good reliability of the new compression cavity.
In the present invention, a cylinder assembly includes: the inner wall of the cylinder 1 is provided with a sliding vane groove 11; the first end seals 15 and the second end seals 16 are disposed at two axial ends of the cylinder 1, and define the inner cavity with the cylinder 1, and define the slide accommodating cavity with the slide groove 11. In the present invention, the first end of the controllable valve assembly may be directly connected to the tail end of the sliding vane groove 11, or the tail end of the sliding vane groove may be closed, and a connection hole is additionally formed on the first end sealing member or the second end sealing member at a position corresponding to the sliding vane groove, so that the first end of the controllable valve assembly is connected to the connection hole. This embodiment preferably employs a controllable valve assembly in communication with the trailing end of the slider groove 11. The design of the new compression cavity can be realized without making more improvements to the existing sliding vane groove structure, and the structure is simple and easy to realize.
As a variant embodiment, the slide receiving cavity may also be formed by a strip-shaped blind hole directly formed in the wall of the cylinder 1 and radially opened along the cylinder, and the slide is placed in the strip-shaped blind hole to slide.
In the present invention, as shown in fig. 1, the second exhaust port 111 and the exhaust port 112 on the high-pressure chamber 13 side are provided on the first end seal 15. When the slide sheet accommodating cavity is formed by the strip-shaped blind hole, a communication hole is formed in the upper end face of the strip-shaped blind hole and the upper end face of the cylinder, and the second exhaust port 111 formed in the first end sealing member 15 is communicated with the strip-shaped blind hole through the communication hole. As another embodiment, the second exhaust port 111 may also be directly disposed on the cylinder 1, for example, the tail end of the sliding vane groove 11 is set as the second exhaust port 111, specifically, the tail end of the sliding vane groove 11 may be made into a stepped hole structure, the elastic member is disposed on the step of the stepped hole to limit, and the tail end of the stepped hole is provided with the exhaust valve assembly. The exhaust valve assembly comprises a valve block baffle and a valve block which are arranged on the first end sealing piece 15 or the air cylinder 1 through rivets. The pump body assembly in this embodiment further includes a muffler 15 disposed above the first end seal 15.
The second end of the controllable valve component is communicated with the low-pressure cavity, and can be communicated with the low-pressure cavity through the air suction port 12, or can be additionally provided with a vent hole on the cylinder wall to be communicated with the low-pressure cavity.
The valve comprises a controllable electromagnetic valve, a management circuit which is suitable for controlling the turn-off or turn-on state of the controllable valve component is arranged in the pump body component in a matched mode, the control output end of the management circuit is connected with the valve controlled end in the controllable valve component, and the valve is turned on or turned off according to a control instruction of the management circuit.
As shown in fig. 1, the second suction port 311 is a long, elongated slot provided in the longitudinal direction along the extending or retracting direction of the slide 31. When designing the maximum length of the second air suction port 311 exposing the slide receiving chamber side, first, setting the dimension of the second air suction port 311 exposing the slide receiving chamber side along the extending or retracting direction of the slide 31 as H when the slide 31 extends out of the slide receiving chamber to the longest, and setting the eccentric amount of the eccentric rotation assembly as e, and setting the distance between the head of the second air suction port 311 and the head of the slide 31 as X, h=2e-X. According to the actual operation requirement, the value range of H can be set to be 0.1-0.2 mm. The size of H cannot be too large or too small, and the exposed size range needs to be set reasonably.
On the basis of the above, the process of the second suction port 311 from the about-to-extend slider accommodating chamber to the about-to-fully-retract slider accommodating chamber will be described in further detail. The eccentric rotating assembly is used for completely compressing the sliding vane to the sliding vane accommodating cavity as a rotating origin, when the eccentric rotating assembly rotates to 128 degrees from the origin, the second air suction port 311 starts to extend out of the sliding vane accommodating cavity, and the 128-degree rotating angle of the eccentric rotating assembly is the opening angle of the air suction channel. When the eccentric rotating assembly continues to rotate to 180 degrees, the distance that the sliding vane 31 extends out of the sliding vane accommodating cavity is longest, the distance that the second air suction port 311 exposes out of the sliding vane accommodating cavity is also longest, the size is preferably between 0.1 and 0.2mm, and the specific size is determined according to design requirements. When the eccentric rotating component continues to rotate, the sliding vane starts to retract, so that the distance of the second air suction port exposing the sliding vane accommodating cavity is gradually reduced, and when the eccentric rotating component continues to rotate to 232 degrees, the second air suction port 311 is closed, and the 232-degree corner of the eccentric rotating component is the closing angle of the air suction channel. Thus, the suction angle range of the slide receiving chamber can be calculated to be α=232° -128 ° =104°. The above is merely a distance to illustrate the suction angle of the second suction passage, and is not limited thereto, and the opening angle and the closing angle of the suction passage may be changed according to design requirements.
As shown in fig. 2, the slide groove 11 is a through cavity formed on the cylinder 1, and the upper end surface and the lower end surface of the slide groove are subjected to finish machining and are matched with the upper flange and the lower flange to seal so as to form a slide accommodating cavity.
In this embodiment, the sliding vane assembly further includes: the elastic member 32 is disposed in the slide accommodating chamber, and the biasing force thereof acts on the slide 31 to keep the slide 31 in contact with the outer circumferential surface of the eccentric rotating assembly. The elastic member 32 is a compression spring or a pagoda spring. The present embodiment is preferably a compression spring.
In the present embodiment, the slide 31 includes: the gleitbretter body, gleitbretter body afterbody is equipped with spacing portion, and the flexible free end and the spacing portion of elastic component 32 are connected. The limiting part is a groove, and the telescopic free end of the elastic piece 32 is arranged in the groove. The position and connection of the slide body and the elastic member 32 can be more firmly positioned. As shown in fig. 1, the tail end of the second air suction port 311 is communicated with the groove.
In the present embodiment, the suction port 12 is provided on the inner cavity wall of the cylinder 1. The eccentric rotation assembly includes: a crankshaft 2, wherein the crankshaft 2 penetrates through the cylinder assembly, and the crankshaft 2 is provided with an eccentric part; the roller 4, the roller 4 is sleeved on the eccentric part.
The working process of the variable capacity pump body component comprises the following steps:
loading a new compression chamber: when the working load of the pump body is higher, the controllable valve component cuts off the communication between the first end and the second end, the sliding vane accommodating cavity is closed, and in this state, when the sliding vane 31 extends out of the sliding vane accommodating cavity to the second air suction port 311 gradually exposes, the second air suction port 311 gradually communicates the low pressure cavity 14 with the sliding vane accommodating cavity; when the eccentric rotating assembly drives the sliding vane 31 to retract until the second air suction port 311 is completely positioned in the sliding vane accommodating cavity, the communication between the low-pressure cavity 14 and the sliding vane accommodating cavity is cut off, the second air suction port 311, the sliding vane accommodating cavity and the second air discharge port 111 form a closed additional compression cavity, low-pressure gas in the sliding vane accommodating cavity is compressed along with the continuous retraction of the sliding vane 31 to form high-pressure gas until the pressure of the high-pressure gas reaches the discharge pressure for opening the exhaust valve assembly, and the compressed high-pressure gas is discharged through the second air discharge port 111, so that the compression process of a new compression cavity is completed.
Unloading the new compression chamber: when the working load of the pump body is lower, the controllable valve component is communicated with the first end and the second end, the sliding vane accommodating cavity is communicated with the low-pressure cavity 14, low-pressure gas in the sliding vane accommodating cavity enters from the second air suction port, and flows back to the low-pressure cavity 14 through the tail end of the sliding vane accommodating cavity and the controllable valve component along with the continuous retraction of the sliding vane 31, so that the sliding vane accommodating cavity cannot form a new compression cavity and does not participate in the operation of compressed gas, and the purposes of unloading the new compression cavity to reduce the volume are achieved.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (19)
1. A variable capacity pump body assembly, comprising:
the cylinder assembly is provided with an inner cavity, and a sliding vane accommodating cavity is formed in the inner wall of the inner cavity;
the eccentric rotating assembly is arranged in the inner cavity;
the sliding vane assembly is arranged in the sliding vane accommodating cavity and comprises a sliding vane (31) with the head part kept in contact with the eccentric rotating assembly, and the sliding vane (31) divides the inner cavity into a high-pressure cavity (13) with an exhaust port (112) and a low-pressure cavity (14) with an air suction port (12);
a second air suction port (311) is additionally arranged on the side wall of the sliding sheet (31) facing the low-pressure cavity (14);
the cylinder assembly is provided with a second exhaust port (111) communicated with the sliding vane accommodating cavity, and an exhaust valve assembly is arranged at the second exhaust port (111);
the controllable valve assembly comprises a first end communicated with the sliding vane accommodating cavity, a second end communicated with the low-pressure cavity (14) and a valve which is arranged between the first end and the second end and can control the on-off of the first end and the second end;
when loading and capacity increasing are carried out, the controllable valve component cuts off the communication between the first end and the second end, and the sliding vane accommodating cavity is closed; when the sliding vane (31) extends out of the sliding vane accommodating cavity to the second air suction port (311), the second air suction port (311) communicates the low-pressure cavity (14) with the sliding vane accommodating cavity; when the eccentric rotating assembly drives the sliding vane (31) to retract to the position that the second air suction port (311) is completely positioned in the sliding vane accommodating cavity, the communication between the low-pressure cavity (14) and the sliding vane accommodating cavity is cut off, the second air suction port (311), the sliding vane accommodating cavity and the second air exhaust port (111) form an additional compression cavity, and low-pressure gas in the sliding vane accommodating cavity is continuously retracted along with the sliding vane (31) to be compressed to form high-pressure gas until reaching the discharge pressure for opening the exhaust valve assembly, and the high-pressure gas is exhausted through the second air exhaust port (111);
when the volume is reduced by unloading, the controllable valve component is communicated with the first end and the second end, the sliding vane accommodating cavity is communicated with the low-pressure cavity (14), low-pressure gas in the sliding vane accommodating cavity continuously retracts along with the sliding vane (31), and flows back into the low-pressure cavity (14) through the sliding vane accommodating cavity and the controllable valve component.
2. The variable capacity pump body assembly of claim 1, wherein the cylinder assembly comprises:
the inner wall of the cylinder (1) is provided with a sliding vane groove (11);
the first end sealing piece (15) and the second end sealing piece (16) are arranged at two axial ends of the air cylinder (1), and the inner cavity is defined by the first end sealing piece and the air cylinder (1), and the sliding piece accommodating cavity is defined by the first end sealing piece and the second end sealing piece and the sliding piece groove (11).
3. A variable displacement pump assembly according to claim 2, wherein the trailing end of the vane slot (11) communicates with the first end of the controllable valve assembly.
4. A variable displacement pump assembly according to claim 1, wherein the second end of the controllable valve assembly is in communication with the suction port (12).
5. The variable capacity pump body assembly of claim 1, wherein the valve comprises a controllable solenoid valve.
6. A variable displacement pump assembly as claimed in claim 1, further comprising a management circuit adapted to control the off or on state of the controllable valve assembly, a control output of the management circuit being connected to a valve controlled end in the controllable valve assembly.
7. Variable displacement pump body assembly according to claim 2, characterized in that the second exhaust (111) is provided on the first end seal (15).
8. Variable displacement pump body assembly according to claim 2, characterized in that the high-pressure chamber (13) side exhaust (112) is provided on the first end seal (15).
9. The variable capacity pump body assembly of claim 1, wherein the slide assembly further comprises:
and the elastic piece (32) is arranged in the sliding piece accommodating cavity, and the biasing force of the elastic piece acts on the sliding piece (31) to enable the sliding piece (31) to keep contact with the outer circumferential surface of the eccentric rotating assembly.
10. Variable displacement pump body assembly according to claim 9, wherein the slide (31) comprises: the sliding vane body, sliding vane body afterbody is equipped with spacing portion, flexible free end of elastic component (32) with spacing portion connects.
11. A variable displacement pump body assembly according to claim 10, wherein the stop is a recess in which the flexible free end of the resilient member (32) is disposed.
12. A variable displacement pump body assembly according to claim 11, wherein the trailing end of the second suction port (311) communicates with the recess.
13. A variable capacity pump body assembly as claimed in any one of claims 1 to 12, wherein the second suction port (311) is a long elongated slot provided in a length direction along the extending or retracting direction of the slide (31).
14. The variable capacity pump body assembly according to claim 13, wherein the eccentric amount of the eccentric rotation assembly is set to be e, the distance between the head of the second suction port (311) and the head of the vane (31) is set to be X, and when the vane (31) protrudes out of the vane accommodating chamber to the longest extent, the dimension of the second suction port (311) on the side of the vane accommodating chamber along the extending or retracting direction of the vane (31) is set to be H, H = 2e-X is satisfied.
15. A variable displacement pump assembly as claimed in claim 14, wherein H is in the range 0.1 to 0.2mm.
16. Variable displacement pump body assembly according to claim 2, characterized in that the suction opening (12) is provided in the inner chamber wall of the cylinder (1).
17. The variable capacity pump body assembly of claim 1, wherein the eccentric rotation assembly includes:
-a crankshaft (2), said crankshaft (2) extending through said cylinder assembly, and said crankshaft (2) having an eccentric portion thereon;
and the roller (4) is sleeved on the eccentric part.
18. Variable displacement pump body assembly according to claim 2, characterized in that the slide slot (11) is a through cavity formed in the cylinder (1).
19. A compressor comprising a pump body assembly according to any one of claims 1-18.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811069981.XA CN109026703B (en) | 2018-09-13 | 2018-09-13 | Variable capacity pump body assembly and compressor with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811069981.XA CN109026703B (en) | 2018-09-13 | 2018-09-13 | Variable capacity pump body assembly and compressor with same |
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| CN109026703A CN109026703A (en) | 2018-12-18 |
| CN109026703B true CN109026703B (en) | 2024-03-22 |
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| KR20140131744A (en) * | 2013-05-06 | 2014-11-14 | 삼성전자주식회사 | Rotary compressor |
| CN208996947U (en) * | 2018-09-13 | 2019-06-18 | 珠海凌达压缩机有限公司 | A kind of variable capacity pump assembly and the compressor with the pump assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0579480A (en) * | 1991-09-17 | 1993-03-30 | Daikin Ind Ltd | Rotary compressor |
| KR100816656B1 (en) * | 2006-12-27 | 2008-03-26 | 엘지전자 주식회사 | Modulation type rotary compressor |
| CN102037216A (en) * | 2008-05-19 | 2011-04-27 | 松下电器产业株式会社 | Two-stage rotary expander, expander-integrated compressor, and refrigeration cycle device |
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| CN109026703A (en) | 2018-12-18 |
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