CN111075721B - Pump body subassembly and variable volume compressor - Google Patents

Pump body subassembly and variable volume compressor Download PDF

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Publication number
CN111075721B
CN111075721B CN201911365940.XA CN201911365940A CN111075721B CN 111075721 B CN111075721 B CN 111075721B CN 201911365940 A CN201911365940 A CN 201911365940A CN 111075721 B CN111075721 B CN 111075721B
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China
Prior art keywords
pin
hole
cylinder
vent
pump body
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CN201911365940.XA
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Chinese (zh)
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CN111075721A (en
Inventor
胡余生
魏会军
翟元彬
阙沛祯
胡艳军
苗旺
赵逸
马舒院
周艳
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Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
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Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
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Priority to CN201911365940.XA priority Critical patent/CN111075721B/en
Publication of CN111075721A publication Critical patent/CN111075721A/en
Priority to PCT/CN2020/111241 priority patent/WO2021128905A1/en
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Publication of CN111075721B publication Critical patent/CN111075721B/en
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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
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
    • 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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • 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
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • 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
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/18—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the volume of the working chamber
    • 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
    • F04C29/06—Silencing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

The invention relates to the technical field of compressors, in particular to a pump body device and a variable capacity compressor, wherein a pump body assembly is applied to the variable capacity compressor and comprises a plurality of air cylinder pieces, sliding pieces and pin pieces, the air cylinder pieces are provided with pin holes, the pin pieces are arranged in the pin holes and can move along the axial direction of the pin holes, the air cylinder pieces are also provided with sliding piece grooves, the sliding pieces are arranged in the sliding piece grooves, and the pin holes are communicated with the sliding piece grooves.

Description

Pump body subassembly and variable volume compressor
Technical Field
The invention relates to the technical field of compressors, in particular to a pump body device and a variable displacement compressor.
Background
Double-cylinder or multi-cylinder variable volume compressor, its variable volume cylinder generally sets up to lower cylinder, and lower cylinder lower extreme has the lower flange, and the pin is placed in lower flange pin hole, but current variable volume compressor, wherein there is lower gleitbretter in the lower cylinder gleitbretter inslot, and the lower extreme of gliding piece is provided with pin locking groove, and the pin sets up in lower flange pin hole, and the pin lower extreme has sealed apron, this double-cylinder compressor, because the pin hole is seted up on the lower flange, and then there is the structure complicacy, the problem that the assembly process degree of difficulty is high.
Disclosure of Invention
In view of this, the present invention aims to avoid the disadvantages in the prior art and provide a pump body assembly, which solves the problem of complex structure of the conventional variable displacement compressor lower flange due to the arrangement of the pin holes, and makes the structure and the assembly process of the pump body assembly simpler.
The embodiment of the invention provides a pump body assembly which comprises a plurality of air cylinder pieces, sliding pieces and pin pieces, wherein the air cylinder pieces are provided with a plurality of pin holes, the pin pieces are arranged in the pin holes and can move along the axial direction of the pin holes, the air cylinder pieces are also provided with sliding piece grooves, the sliding pieces are arranged in the sliding piece grooves, and the pin holes are communicated with the sliding piece grooves.
Furthermore, the pin hole is perpendicular to the end face of the slide sheet groove, one end of the pin hole is communicated with the slide sheet groove, and the end far away from the slide sheet groove is parallel to the slide sheet groove.
Furthermore, a slide piece locking hole used for limiting the position of the slide piece is formed in the slide piece.
Furthermore, the pin piece comprises a pin column, a pin head is fixed at one end of the pin column, a spring hole is formed in the other end of the pin column, a vent groove is formed between the spring hole and the pin column and is arranged on one side far away from the pin head, a vent hole is further formed between the spring hole and the vent groove, and the vent hole is communicated with the spring hole and the vent groove respectively.
Further, still including spring and the sealed apron of pin, the spring is fixed in the spring hole, seal assembly set up in the pin hole is kept away from the one end in slide groove, the sealed apron of pin passes through the bolt fastening in on the cylinder spare.
Further, still including a plurality of baffle pieces, it is single baffle piece is fixed in two between the cylinder piece, varactor air vent and gleitbretter afterbody air vent have been seted up on the baffle piece, communicate through varactor air vent groove between varactor air vent and the gleitbretter afterbody air vent, gleitbretter afterbody air vent still with communicate each other between the gleitbretter groove of cylinder piece.
Further, still including a plurality of baffle pieces, it is single baffle piece is fixed in two between the cylinder piece, varactor air vent and gleitbretter afterbody air vent have been seted up on the baffle piece, communicate through varactor air vent groove between varactor air vent and the gleitbretter afterbody air vent, gleitbretter afterbody air vent still with communicate each other between the gleitbretter groove of cylinder piece.
Furthermore, a low-pressure communicating hole and a pin tail communicating hole are formed in the partition plate, and the low-pressure communicating hole is connected with the pin tail communicating hole through a low-pressure vent groove.
Further, the side surface of the cylinder part is also provided with an air suction hole, the end surface of the cylinder part is provided with a low-pressure vent hole, one end of the low-pressure vent hole is communicated with the air suction hole, and the other end of the low-pressure vent hole is communicated with the low-pressure communication hole of the partition plate part;
the end face of the cylinder part is also provided with a pin tail vent hole, one end of the pin tail vent hole is communicated with the pin hole, and the other end of the pin tail vent hole is communicated with the pin tail communicating hole of the partition plate assembly;
the low-pressure vent hole and the pin tail vent hole are formed in the same end face of the cylinder piece, and the partition plate assembly low-pressure communication hole, the low-pressure vent groove and the pin tail communication hole are communicated with each other.
Furthermore, the device also comprises an upper flange and a lower flange, wherein at least one or more of the upper flange, the lower flange and the partition plate is/are provided with variable-volume vent holes, and the variable-volume vent grooves are respectively communicated with the slide sheet groove and the variable-volume vent holes;
and a lower silencer is fixed at the lower end of the lower flange.
Further, at least one or more of the upper flange, the lower flange and the partition plate is/are provided with a low-pressure communication hole, and the low-pressure vent groove is respectively communicated with the pin tail vent hole and the low-pressure communication hole.
The embodiment of the invention also provides a variable capacity compressor, which comprises a variable capacity liquid distributor, an air suction liquid distributor and the pump body assembly, wherein the inlet end of the variable capacity liquid distributor is respectively communicated with the air suction liquid distributor through a first electromagnetic valve, and the inlet end of the variable capacity liquid distributor is respectively communicated with the exhaust pipe of the pump body assembly through a second electromagnetic valve.
Furthermore, the variable-volume compressor is a double-cylinder compressor, and the cylinder part is an upper cylinder or a lower cylinder in the double-cylinder compressor;
the variable-capacity compressor is a multi-cylinder compressor, and the cylinder parts are any one cylinder part or combination of a plurality of cylinder parts in the multi-cylinder compressor.
Compared with the prior art, the invention has the following beneficial effects:
(1) the cylinder part is provided with the pin hole and the slide sheet groove, and the pin hole structure is communicated with the side surface of the slide sheet groove, so that the lower flange in the prior art is not required to be provided with the pin hole, and the structure and the assembly process of the pump body assembly are simpler and more convenient;
(2) because the pin sealing cover plate is arranged at the tail part of the pin hole on the side surface of the cylinder part, the sealing effect can be effectively achieved through the sealing mode of the pin sealing cover plate, and a lower cover plate ventilation and sealing device in the prior art is omitted, so that the pump body assembly is more compact in structure and simpler in assembly process;
(3) because the partition plate is provided with the communication channel for the pressure of the head part and the tail part of the pin, and the lower silencer is assembled at the lower end of the lower flange, the noise of the compressor is more excellent than that of the conventional variable-capacity compressor;
(4) because the function of pin action switching variable volume is integrated to single cylinder spare, can realize the variable volume function on arbitrary cylinder.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
Fig. 1 is a schematic view of a variable displacement compressor according to the present invention.
Fig. 2 is a schematic structural diagram of a pump body assembly according to an embodiment of the invention.
Fig. 3 is an exploded view of an assembly of a cylinder assembly in accordance with an embodiment of the present invention.
FIG. 4 is a schematic structural diagram of a cylinder assembly according to an embodiment of the present invention.
FIG. 5 is a schematic view of a slider structure according to an embodiment of the present invention.
FIG. 6 is a schematic view of a partition structure according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of a pin structure according to an embodiment of the present invention.
FIG. 8 is a schematic diagram of a single cylinder mode pressure distribution and structure according to an embodiment of the present invention.
FIG. 9 is a schematic diagram of a dual cylinder mode pressure distribution and structure according to an embodiment of the present invention.
FIG. 10 is a schematic structural diagram of a second pump body assembly according to an embodiment of the present invention.
FIG. 11 is a schematic structural diagram of a three-pump body assembly according to an embodiment of the present invention
The figure includes: an upper cover assembly 11, a middle cylinder 111, a middle partition plate 112, a middle slide vane 113, a rotor assembly 12, a stator assembly 13, a shell assembly 14, a pump body assembly 15, a variable-volume liquid distributor 16, a lower cover assembly 17, a suction liquid distributor 18, a crankshaft 201, an upper silencer 202, an upper flange 203, an upper cylinder 204, an upper partition plate 205, a lower partition plate 206, a low-pressure communication hole 2061, a variable-volume vent hole 2062, a slide-vane tail vent hole 2063, a variable-volume vent groove 2064, a pin tail communication hole 2065, a low-pressure vent groove 2066, a lower cylinder 207, a low-pressure vent hole 2071, a suction hole 2072, a pin hole 2073, a seal screw hole 2074, a pin tail vent hole 2075, a slide-vane groove 2076, a lower flange 208, a pin member 209, a pin head 2091, a pin post 2092, a spring hole 2093, a vent pin 2094, a pin vent groove 2095, a spring 210, a pin seal cover plate 211, a lower silencer 212, a slide vane 213, a slide-vane lock hole 2131, a cover plate 214, a lower roller 215, a first solenoid valve 31, a second battery valve 32.
Detailed Description
The invention is further described with reference to the following examples.
Example one
As shown in fig. 1, the present embodiment provides a variable capacity compressor, which includes an upper cover assembly 11, a shell assembly 14, and a lower cover assembly 17, wherein the shell assembly 14 is fixed between the upper cover assembly 11 and the lower cover assembly 17 and forms a closed space; the motor also comprises a rotor assembly 12 and a stator assembly 13, wherein a power supply is connected to provide driving force; the stator assembly 13 is fixed on the inner circumferential wall of the shell assembly 14; the pump body assembly 15 is fixed on the inner circumferential wall of the shell assembly 14 and is connected with the rotor assembly 12; the pump body assembly 15 is driven by the rotor assembly 12 to perform periodic compression work; the refrigerant pump further comprises a suction gas dispenser 18, wherein the outlet end of the suction gas dispenser 18 is connected with the pump body assembly 15 and provides low-temperature and low-pressure refrigerant gas for the pump body assembly 15; the variable-capacity liquid distributor 16 is further included, an outlet end of the variable-capacity liquid distributor 16 is connected with the pump body assembly 15, and an inlet end of the variable-capacity liquid distributor 16 is communicated with suction pressure through a first electromagnetic valve 31 and communicated with discharge pressure through a second electromagnetic valve 32.
As shown in fig. 2, the pump body assembly 15 has at least two cylinder members, and at least one of the cylinder members is a variable displacement cylinder assembly having both an operating mode and an unloading mode. The cylinder member includes an upper cylinder 204 and a lower cylinder 207, or any one or more of a plurality of cylinders. This embodiment illustrates the present invention by taking the lower cylinder 207 as a cylinder member, but is not limited to the embodiment in which the lower cylinder is a variable displacement cylinder member. The pump body assembly 15 includes: an upper silencer 202, an upper flange 203, an upper cylinder 204 and the like are sequentially connected to form an upper cylinder part; the lower cylinder device comprises an upper partition plate 205, a lower partition plate 206, a lower cylinder 207, a lower flange 208, a pin 209, a spring 210, a pin sealing cover plate 211, a lower silencer 212, a sliding sheet 213 and the like. A crankshaft 201 is included to connect the upper and lower cylinder members in series, forming a periodic working volume with the cylinder members.
As shown in fig. 3, the upper partition plate 205 and the lower partition plate 206 constitute a partition plate member, which is disposed at the upper end of the lower cylinder 207, and the lower flange 208 and the lower muffler 212 are disposed at the lower end of the lower cylinder 207. The lower cylinder 207 further comprises a slide sheet 213 and a lower roller 215, the lower roller 215 is nested on the outer circle of the eccentric part of the crankshaft 201, and the head part of the slide sheet 213 is always attached to the outer circle surface of the lower roller 215 in the working state; the lower roller 215, the lower cylinder 207 and the slide plate 213 form a working volume of the lower cylinder 207, divide the inner circumference of the lower cylinder 207 into an air suction cavity and a compression cavity, and form periodic change through the rotation of the crankshaft 201, so as to realize the processes of air suction, compression and exhaust of the lower cylinder 207.
As shown in fig. 4, a slide slot 2076 is formed on the lower cylinder 207, and the slide 213 is placed in the slide slot 2076 to reciprocate; the lower cylinder 207 is also provided with a pin hole 2073, and the pin 209 is placed in the pin hole 2073; the pin hole 2073 is disposed at one side of the lower cylinder 207 near the exhaust port, one end of the pin hole 2073 is communicated with the slide groove 2076 and is perpendicular to the end surface of the slide groove 2076, that is, the pressure at the tail of the slide 213 is the same as the pressure at the head of the pin hole 2073. One end of the pin hole 2073, which is far away from the slide groove 2076, is parallel to the end surface of the slide groove 2076, and is provided with a plurality of sealing screw holes 2074. Lower cylinder spare still includes sealed apron 211 of pin and apron locking screw 214, sealed apron 211 of pin set up in pin hole 2073 is provided with the one end of sealing screw hole 2074, locks in sealing screw hole 2074 through a plurality of apron locking screw 214, and the realization is right the tail end of pin hole 2073 is sealed. The lower cylinder 207 comprises an air suction hole 2072, a low pressure vent hole 2071 and a pin tail vent hole 2075. The low-pressure vent 2071 and the pin tail vent 2074 are disposed on the same end surface of the lower cylinder 207. The low pressure vent 2071 is communicated with the air suction hole 2072, and the pin tail vent 2072 is communicated with the pin hole 2073 and is disposed at one end far away from the slide groove 2076.
As shown in fig. 5, the slide 213 has a slide lock hole 2131, and the slide lock hole 2131 is provided in an end surface of the slide 213 in the width direction at a position: when the slide 213 is completely retracted into the slide slot 2076, the slide locking hole 2131 corresponds to the pin hole 207 c. The slide locking hole can be designed to be cylindrical, prismatic, conical or pyramidal. The sliding piece locking hole 2131 is a blind hole and cannot be designed as a through hole. When the vane 213 is extended out of the vane groove 2076 by the maximum distance, the vane lock hole 2131 is a through hole, which may cause the refrigerant in the compression chamber in the cylinder to leak into the suction chamber through the gap between the through holes, thereby preventing the performance of the compressor from being deteriorated.
As shown in fig. 6, the lower diaphragm 206 is installed at the upper end of the lower cylinder 207, includes a variable volume vent 2062, a variable volume vent groove 2064, and a slider tail vent 2063, and is connected in sequence. The inlet end of the positive displacement vent 2062 communicates with the outlet end of the positive displacement liquid distributor 16. The slide tail vent 2063 is communicated with the slide groove 2074 of the lower cylinder 207, that is, the pressure at the tail of the slide 213 and the pressure at the head of the pin hole 2073 are both from the gas pressure provided by the variable volume liquid distributor 16. The lower partition 206 further includes: it has a low pressure communicating hole 2061, a low pressure vent groove 2066 and a pin tail communicating hole 2065, which are communicated in sequence. The low pressure communicating hole 2061 is communicated with a low pressure vent hole 2071 arranged on the lower cylinder 207, the pin tail communicating hole 2065 is communicated with a pin tail vent hole 2075 arranged on the lower cylinder 207, namely, the pressure at the tail of the pin hole 2073 is always the same as that of the air suction port 2072 of the lower cylinder 207.
As shown in fig. 7, the pin 209 is disposed in a pin hole 2073 of the lower cylinder 207 and is movable in an axial direction of the pin hole 2073. The pin 209 has a pin head 2091 and a pin post 2092, and the pin 209 is disposed in the pin hole 2073 in a direction such that the pin head 2091 is close to the slider slot 2076 and the pin post 2092 is far from the slider slot 2076. The pin head 2091 may be cylindrical, prismatic, conical, or pyramidal in shape, and may have a shape corresponding to the lower slide lock hole 2131. The pin post 2092 and the pin hole 2073 are clearance fit, and the single-side clearance is designed to be 0.01mm, so as to ensure that the pin 209 moves smoothly in the pin hole 2073 and isolate the pressure of the pin head 2091 and the tail of the pin. The pin 209 also includes a pin spring hole 2093, a pin vent hole 2094, and a pin vent slot 2095. The pin spring hole 2093 is a blind tail hole of the pin 209, and the spring 210 is disposed inside the pin spring hole 2093. The pin vent 2094 communicates between the pin spring aperture 2093 and the pin vent groove 2094. The pin vent groove 2095 is communicated with a pin tail vent hole 2074 arranged on the lower cylinder 207; i.e., the pressure of the pin spring hole 2093 is always the same as the suction port 2072 of the lower cylinder 207.
The variable capacity compressor has a variable capacity liquid separator 16, the inlet end of the variable capacity liquid separator 16 being in communication with suction pressure via a first solenoid valve 31 and with discharge pressure via a second solenoid valve 32, respectively. The outlet end of the positive displacement liquid distributor 16 is communicated with the positive displacement vent 2062 of the lower baffle 206 and finally communicated to the tail of the slide groove 2076. The double-cylinder variable-capacity compressor has two operation modes of a single cylinder and double cylinders. When the air conditioning system needs to run at full load, the variable-capacity compressor runs in a double-cylinder mode; when the air conditioning system runs at low load, the refrigerating capacity reduced to the lowest running frequency in the double-cylinder mode is still larger than the requirement of the air conditioning system, and the energy efficiency attenuation of the low-frequency running compressor is larger, so that the compressor runs in the single-cylinder mode, the discharge capacity of the compressor is reduced, and the running frequency can be improved compared with the same refrigerating capacity output in the double-cylinder mode, so that the energy efficiency of the compressor is improved.
The operation mode of the variable capacity compressor in this embodiment is as follows:
single cylinder mode: as shown in fig. 8, when the first solenoid valve 31 is opened and the second solenoid valve 32 is closed, the positive displacement liquid distributor 16 is connected to the suction pressure, the pressure at the tail of the slide groove 2076 is also the suction pressure, and the pressure at the pin head 2091 of the pin 209 is also the suction pressure. Because the pressure at the tail of the pin is always the same as that of the air suction port 2072 of the lower cylinder 207, namely the tail of the pin is also the air suction pressure, the pressure at the two ends of the pin 209 is balanced. The pressure at the tail of the slide 213, i.e. the pressure at the slot 2076, is also the suction pressure, and the pressure inside the lower cylinder 207 is also the suction pressure, i.e. the pressure at the head and tail of the slide 213 is balanced. The pin 209 is provided with a spring 210 inside, and when the pressure at both ends of the pin 209 is balanced, the spring 210 jacks up the pin 209 to move towards the slide slot 2076. When the pressure of the vane 213 is balanced, the vane is retracted into the vane groove 2076 by the centrifugal force of the lower roller 215. When the slide lock hole 2131 of the slide 213 corresponds to the pin head 2091 of the pin 209, the pin head 2091 is inserted into the slide lock hole 2131 to fix the slide 213 in the slide groove 2076. The lower roller 215 idles in the lower cylinder 207, which is now unloaded. Only the upper cylinder works normally, which is a single-cylinder operation mode.
A double-cylinder mode: as shown in fig. 9, when the first solenoid valve 31 is closed and the second solenoid valve 32 is opened, the variable displacement liquid separator 16 communicates the discharge pressure. Namely, the pressure at the tail of the slide groove 2076 and the pressure at the pin head 2091 of the pin 209 are exhaust pressures. Because the pressure at the tail of the pin 209 is always the suction pressure, there is a large pressure difference across the pin 209, which is enough to overcome the spring force of the spring 210, so that the pin 209 is separated from the slide 213 and retreats to the bottom of the pin hole 2073. Meanwhile, the sliding sheet 213 is tightly attached to the outer circle of the lower roller 215 under the action of high pressure at the tail part to form an air suction cavity and a compression cavity, and the lower air cylinder is in a normal working state at the moment. The upper cylinder and the lower cylinder are in normal working states, and at the moment, the two-cylinder operation mode is adopted.
Therefore, by controlling the closing and opening of the first solenoid valve 31 and the second solenoid valve 32, the locking and the disengagement of the slide 213 and the pin 209 can be controlled, thereby controlling the unloading and the working mode of the lower cylinder 207.
Example two
When the pump body assembly 15 is provided with two cylinder pieces, the variable-capacity cylinder piece can be an upper cylinder piece or a lower cylinder piece. The first embodiment is a lower cylinder assembly as a variable displacement cylinder assembly, and as shown in fig. 10, the second or more cylinder assemblies are as variable displacement cylinder assemblies, which are different from the first embodiment in that:
1. the pin 209 and the spring 210 are installed in a pin hole of the upper cylinder 204, the upper slide plate is provided with a slide plate locking hole 213a, and the pin sealing cover plate 211 is locked on the upper cylinder 204.
2. The upper flange 203 is provided with a variable-volume vent hole and a variable-volume vent channel which are communicated with the tail part of the sliding sheet.
3. The upper baffle 205 is provided with a low pressure vent hole and a low pressure vent channel which are communicated with the tail of the pin.
EXAMPLE III
The invention is a multi-cylinder variable capacity compressor having three or more cylinder members. As shown in fig. 11, the difference from the first and second embodiments is that:
1. the pump body assembly 15 further includes a middle cylinder 111, a middle partition 112 and a middle slide sheet 113.
2. The variable-capacity cylinder part can be one or more of a plurality of cylinders, and the variable-capacity compressor has a plurality of operation modes such as single cylinder, double cylinders, multi-cylinder and the like.
3. At least one or more of the plurality of clapboard components is/are provided with a variable volume vent hole and a variable volume vent channel which are communicated with the tail part of the sliding sheet.
4. At least one or more of the clapboard component, the upper flange and the lower flange is/are provided with a low-pressure vent hole and a low-pressure vent channel which are communicated with the tail part of the pin.
Compared with the prior art, the invention has the following beneficial effects:
(1) the cylinder part is provided with the pin hole and the slide sheet groove, and the pin hole structure is communicated with the side surface of the slide sheet groove, so that the lower flange in the prior art is not required to be provided with the pin hole, and the structure and the assembly process of the pump body assembly are simpler and more convenient;
(2) because the pin sealing cover plate is arranged at the tail part of the pin hole on the side surface of the cylinder part, the sealing effect can be effectively achieved through the sealing mode of the pin sealing cover plate, and a lower cover plate ventilation and sealing device in the prior art is omitted, so that the pump body assembly is more compact in structure and simpler in assembly process;
(3) because the partition plate is provided with the communication channel for the pressure of the head part and the tail part of the pin, and the lower silencer is assembled at the lower end of the lower flange, the noise of the compressor is more excellent than that of the conventional variable-capacity compressor;
(4) because the function of pin action switching variable volume is integrated to single cylinder spare, can realize the variable volume function on arbitrary cylinder.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (11)

1. The utility model provides a pump body subassembly, is applied to varactor compressor which characterized in that: including cylinder spare, gleitbretter and pin spare, cylinder spare is provided with a plurality ofly, the round pin hole has been seted up on the cylinder spare, pin spare set up in the round pin is downthehole and can follow the axis direction motion in round pin hole, the gleitbretter groove has still been seted up on the cylinder spare, the gleitbretter set up in the gleitbretter inslot, the round pin hole with communicate each other between the gleitbretter groove, pin spare is including the round pin post, the one end of round pin post is fixed with the round pin fin head, and the spring hole has been seted up to the other end, the spring hole with be provided with the pin air vent between the round pin post, the pin air vent sets up and is keeping away from one side of round pin fin head, the spring hole with still be provided with the pin air vent between the pin air vent, the pin air vent respectively with spring hole and air vent intercommunication.
2. The pump body assembly of claim 1, wherein: the pin hole is perpendicular to the end face of the sliding sheet groove, one end of the pin hole is communicated with the sliding sheet groove, and the end far away from the sliding sheet groove is parallel to the sliding sheet groove.
3. The pump body assembly of claim 1, wherein: and a slide sheet locking hole for limiting the position of the slide sheet is formed in the end face of one side of the slide sheet in the width direction.
4. The pump body assembly of claim 1, wherein: the sliding piece groove is characterized by further comprising a spring and a pin sealing cover plate, the spring is fixed in the spring hole, the sealing assembly is arranged at one end, far away from the sliding piece groove, of the pin hole, and the pin sealing cover plate is fixed on the air cylinder piece through a bolt.
5. The pump body assembly of claim 1, wherein: still including a plurality of baffle pieces, it is single baffle piece is fixed in two between the cylinder piece, varactor air vent and gleitbretter afterbody air vent have been seted up on the baffle piece, communicate through varactor air channel between varactor air vent and the gleitbretter afterbody air vent, gleitbretter afterbody air vent still with communicate each other between the gleitbretter groove of cylinder piece.
6. The pump body assembly of claim 5, wherein: and the partition plate is also provided with a low-pressure communicating hole and a pin tail communicating hole which are connected through a low-pressure vent groove.
7. The pump body assembly of claim 6, wherein:
the side surface of the cylinder part is also provided with an air suction hole, the end surface of the cylinder part is provided with a low-pressure vent hole, one end of the low-pressure vent hole is communicated with the air suction hole, and the other end of the low-pressure vent hole is communicated with a low-pressure communication hole of the partition plate part; the end face of the cylinder part is also provided with a pin tail vent hole, one end of the pin tail vent hole is communicated with the pin hole, and the other end of the pin tail vent hole is communicated with the pin tail communicating hole of the partition plate assembly;
the low-pressure vent hole and the pin tail vent hole are formed in the same end face of the cylinder piece, and the partition plate assembly low-pressure communication hole, the low-pressure vent groove and the pin tail communication hole are communicated with each other.
8. The pump body assembly of claim 5, wherein: the variable-capacity air vent structure is characterized by further comprising an upper flange and a lower flange, wherein at least one or more of the upper flange, the lower flange and the partition plate is/are provided with variable-capacity air vents, and the variable-capacity air vents are respectively communicated with the slide sheet groove and the variable-capacity air vents;
and a lower silencer is fixed at the lower end of the lower flange.
9. The pump body assembly of claim 8, wherein: at least one or more of the upper flange, the lower flange and the partition plate is/are provided with a low-pressure communication hole, and the low-pressure vent groove is respectively communicated with the pin tail vent hole and the low-pressure communication hole.
10. A variable capacity compressor, characterized by: the pump comprises a variable-volume liquid distributor, an air suction liquid distributor and a pump body assembly as claimed in any one of claims 1 to 9, wherein the inlet end of the variable-volume liquid distributor is communicated with the air suction liquid distributor through a first electromagnetic valve respectively, and the inlet end of the second electromagnetic valve is communicated with an exhaust pipe of the pump body assembly.
11. A variable capacity compressor as claimed in claim 10, wherein: the variable-volume compressor is a double-cylinder compressor, and the cylinder part is an upper cylinder or a lower cylinder in the double-cylinder compressor;
the variable-capacity compressor is a multi-cylinder compressor, and the cylinder parts are any one cylinder part or combination of a plurality of cylinder parts in the multi-cylinder compressor.
CN201911365940.XA 2019-12-26 2019-12-26 Pump body subassembly and variable volume compressor Active CN111075721B (en)

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