CN108799103B - Pump body assembly, fluid machinery and heat exchange equipment - Google Patents

Pump body assembly, fluid machinery and heat exchange equipment Download PDF

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Publication number
CN108799103B
CN108799103B CN201810791306.1A CN201810791306A CN108799103B CN 108799103 B CN108799103 B CN 108799103B CN 201810791306 A CN201810791306 A CN 201810791306A CN 108799103 B CN108799103 B CN 108799103B
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CN
China
Prior art keywords
pump body
hole
body assembly
cylinder
rotating shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810791306.1A
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Chinese (zh)
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CN108799103A (en
Inventor
董明珠
胡余生
杜忠诚
徐嘉
任丽萍
杨森
孔令超
陈娟娟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Original Assignee
Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Gree Green Refrigeration Technology Center Co Ltd of Zhuhai filed Critical Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority to CN201810791306.1A priority Critical patent/CN108799103B/en
Publication of CN108799103A publication Critical patent/CN108799103A/en
Application granted granted Critical
Publication of CN108799103B publication Critical patent/CN108799103B/en
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Classifications

    • 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
    • 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
    • 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
    • F04C2240/00—Components
    • F04C2240/10—Stators
    • 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
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • 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
    • F04C2240/00—Components
    • F04C2240/60—Shafts
    • 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
    • F04C2240/00—Components
    • F04C2240/80—Other components

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

The application provides a pump body assembly, a fluid machine and heat exchange equipment. Wherein, pump body subassembly includes: a rotating shaft; the rotating shaft penetrates through the air cylinder; the lower flange is positioned below the cylinder, a protruding part is arranged on the end face, facing the cylinder, of the lower flange, and the protruding part is provided with a through hole for the rotating shaft to pass through. The application effectively solves the problems that the rotating shaft of the pump body assembly is easy to deform and the working performance of the pump body assembly is influenced in the prior art.

Description

Pump body assembly, fluid machinery and heat exchange equipment
Technical Field
The application relates to the technical field of pump body components, in particular to a pump body component, a fluid machine and heat exchange equipment.
Background
In the prior art, as shown in fig. 1, the length H1 of the short shaft section 11' of the rotary shaft 10' of the pump body assembly extending into the cylinder 20' and the lower flange 30' is determined by the heights of the limiting plate 40' and the lower flange 30', resulting in a longer short shaft section 11' and a longer span. Under the same stress condition, the short shaft section 11' of the rotating shaft 10' is easy to deform, so that the contact stress between the short shaft section 11' and the lower flange 30' is increased, structural abrasion is easy to occur at the contact position of the short shaft section 11' and the lower flange, and the working performance and the structural reliability of the pump body assembly are affected.
Disclosure of Invention
The application mainly aims to provide a pump body assembly, a fluid machine and heat exchange equipment, so as to solve the problem that the rotating shaft of the pump body assembly is easy to deform and the working performance of the pump body assembly is influenced in the prior art.
In order to achieve the above object, according to one aspect of the present application, there is provided a pump body assembly comprising: a rotating shaft; the rotating shaft penetrates through the air cylinder; the lower flange is positioned below the cylinder, a protruding part is arranged on the end face, facing the cylinder, of the lower flange, and the protruding part is provided with a through hole for the rotating shaft to pass through.
Further, the protruding portion is a circular boss, the outer circle axis of the circular boss and the outer circle axis of the lower flange are coaxially arranged, and the through hole is formed in the circular boss.
Further, the through hole is eccentrically arranged on the circular boss, and the distance between the axis of the through hole and the outer circle axis of the circular boss is the eccentric distance e.
Further, the pump body assembly further includes: the piston sleeve is arranged in the air cylinder in a pivotable manner, is provided with a through hole for the rotating shaft to pass through, and the protruding part extends into the piston sleeve through the through hole; the piston is arranged in the piston sleeve in a sliding manner to form a variable volume cavity, and a preset distance is reserved between the protruding part and the piston along the axis direction of the rotating shaft.
Further, the piston sleeve includes the body and with body coupling's reducing section, the reducing section is located between body and the lower flange, and pump body subassembly still includes: and the limiting plate is positioned above the lower flange and sleeved outside the reducing section, and is matched with the body stop so as to limit the piston sleeve.
Further, the limiting plate is provided with a central through hole, the diameter-reducing section stretches into the central through hole and then is matched with the limiting plate, a preset gap A is formed between the diameter-reducing section and the hole wall of the central through hole, and the preset gap A is larger than or equal to 0.5mm.
Further, the roughness Ra value of the wall of the via hole is less than 0.5mm.
Further, the rotating shaft comprises a long shaft section, a sliding section and a short shaft section which are sequentially connected, the sliding section is positioned in the piston sleeve, and the short shaft section is arranged in the through hole in a penetrating mode.
Further, the lateral wall of cylinder has the exhaust hole, and pump body subassembly still includes: and the exhaust valve assembly is arranged on the outer surface of the cylinder and corresponds to the position of the exhaust hole.
According to another aspect of the present application, there is provided a fluid machine comprising the pump body assembly described above.
According to another aspect of the present application there is provided a heat exchange device comprising a fluid machine as described above.
By applying the technical scheme of the application, the pump body assembly comprises a rotating shaft, an air cylinder and a lower flange. Wherein, the pivot passes the cylinder. The lower flange is located the below of cylinder, is provided with the protruding portion on the terminal surface of lower flange towards the cylinder, and the protruding portion has the through-hole that supplies the pivot to pass. Like this, the pivot passes cylinder and part pivot and passes the protruding portion on the lower flange, and this part pivot cooperates with the protruding portion, reduces the structural span of pivot in pump body subassembly, prevents that this part pivot from taking place deformation, and then prevents because the pivot takes place the stress concentration phenomenon between the pivot and the lower flange that deformation arouses, avoids pivot and lower flange to appear structural wear.
In the operation process of the pump body component, the rotating shaft is matched with the protruding part of the lower flange, so that the rotating shaft is prevented from being deformed, the contact stress between the rotating shaft and the lower flange caused by the deformation of the rotating shaft is prevented from being increased, the rotating shaft and the lower flange are prevented from being structurally worn, the service life of the pump body component is prolonged, the working performance and the working reliability of the pump body component are improved, and the energy loss is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 shows a cross-sectional view of a pump body assembly of the prior art with an upper flange removed;
FIG. 2 shows a cross-sectional view of an embodiment of a pump body assembly according to the present application;
FIG. 3 shows an exploded view of the pump body assembly of FIG. 2;
FIG. 4 shows a cross-sectional view of the pump body assembly of FIG. 2 with the upper flange removed;
FIG. 5 shows a schematic perspective view of the lower flange of the pump body assembly of FIG. 3;
FIG. 6 shows a top view of the lower flange of FIG. 5;
FIG. 7 shows a cross-sectional view of the lower flange of FIG. 5;
FIG. 8 shows a schematic perspective view of the shaft of the pump body assembly of FIG. 3;
FIG. 9 shows a schematic perspective view of a piston sleeve of the pump body assembly of FIG. 3;
FIG. 10 shows a schematic perspective view of a stop plate of the pump body assembly of FIG. 3; and
fig. 11 shows a schematic diagram of the pump body assembly of fig. 2.
Wherein the above figures include the following reference numerals:
10', a rotating shaft, 11', a short shaft section; 20', a cylinder; 30', a lower flange; 40', a limiting plate; 10. a rotating shaft; 11. a long axis section; 12. a slip segment; 13. a short axis section; 20. a cylinder; 21. an exhaust hole; 30. a lower flange; 31. a protruding portion; 311. a through hole; 40. a piston sleeve; 41. a via hole; 42. a body; 43. a reducing section; 50. a piston; 60. a limiting plate; 61. a central through hole; 70. an exhaust valve assembly; 80. and (5) an upper flange.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used generally with respect to the orientation shown in the drawings or to the vertical, vertical or gravitational orientation; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present application.
The application provides a pump body assembly, a fluid machine and heat exchange equipment, and aims to solve the problem that a rotating shaft of the pump body assembly is easy to deform and the working performance of the pump body assembly is influenced in the prior art.
As shown in fig. 2 to 4, the pump body assembly includes a rotary shaft 10, a cylinder 20, and a lower flange 30. Wherein the rotary shaft 10 passes through the cylinder 20. The lower flange 30 is located under the cylinder 20, a protrusion 31 is provided on an end surface of the lower flange 30 facing the cylinder 20, and the protrusion 31 has a through hole 311 through which the rotation shaft 10 passes.
By applying the technical scheme of the embodiment, the rotating shaft 10 passes through the cylinder 20, a part of the rotating shaft 10 passes through the protruding part 31 on the lower flange 30, the part of the rotating shaft 10 is matched with the protruding part 31, the structural span of the rotating shaft 10 in the pump body assembly is reduced, the part of the rotating shaft 10 is prevented from being deformed, and further, the stress concentration phenomenon between the rotating shaft 10 and the lower flange 30 caused by the deformation of the rotating shaft 10 is prevented, and structural abrasion between the rotating shaft 10 and the lower flange 30 is avoided.
In the operation process of the pump body component, the rotating shaft 10 is matched with the protruding part 31 of the lower flange 30, so that the rotating shaft 10 is prevented from being deformed, the contact stress between the rotating shaft 10 and the lower flange 30 caused by deformation of the rotating shaft 10 is prevented from being increased, the rotating shaft 10 and the lower flange 30 are prevented from being structurally worn, the service life of the pump body component is prolonged, the working performance and the working reliability of the pump body component are improved, and the energy loss is reduced.
As shown in fig. 2 to 4, the protruding portion 31 is a circular boss, an outer circumferential axis of which is coaxially disposed with an outer circumferential axis of the lower flange 30, and the through hole 311 is disposed on the circular boss. Specifically, the protruding portion 31 extends into the cylinder 20, and the rotary shaft 10 passes through the cylinder 20 and the protruding portion 31 and then passes out of the lower flange 30. The circular boss-shaped protruding portion 31 enables the assembly of the lower flange 30 and the cylinder 20 to be easier and more convenient, and enables the processing of the protruding portion 31 to be easier and simpler, so that the labor intensity of workers is reduced, the processing time is shortened, and the processing cost of the pump body assembly is further reduced.
As shown in fig. 5 to 7, the through hole 311 is eccentrically provided on the circular boss, and a distance between an axis of the through hole 311 and an outer circumferential axis of the circular boss is an eccentricity e. Wherein the cylinder 20 is arranged coaxially with said lower flange 30. Specifically, the rotary shaft 10 passes through the protruding portion 31 on the lower flange 30 through the through hole 311, so that the rotary shaft 10 can rotate in the cylinder 20 and the lower flange 30, and the suction, compression and exhaust actions of the cylinder 20 are realized. The rotating shaft 10 and the circular boss are eccentrically arranged to ensure that the eccentricity of the pump body assembly is e, so that the normal operation of the pump body assembly is realized, and the operation stability of the pump body assembly is ensured.
Compared with the prior art, the eccentricity of the pump body assembly is determined by the distance between the center of the circle formed by the flange screw holes and the axis of the shaft hole, and in the embodiment, the eccentricity of the pump body assembly is determined by the outer circle axis of the circular boss and the axis of the through hole 311, so that the pump body assembly is simple and reliable.
In the embodiment, the eccentricity e of the pump body assembly is determined through the structure, so that the control mode of the eccentricity e is easier to ensure, and the pump is simple and reliable.
As shown in fig. 2-4, the pump body assembly further includes a piston sleeve 40 and a piston 50. The piston sleeve 40 is pivotally disposed in the cylinder 20, the piston sleeve 40 has a through hole 41 through which the rotating shaft 10 passes, and the protrusion 31 extends into the piston sleeve 40 through the through hole 41. The piston 50 is slidably disposed in the piston housing 40 to form a variable volume chamber with a predetermined distance between the protrusion 31 and the piston 50 in the axial direction of the rotation shaft 10. In this way, the above-mentioned predetermined distance is set in the process of the piston 50 running in the piston sleeve 40, so that the structural interference between the piston 50 and the protruding portion 31 can be prevented, and further the structural reliability of the pump body assembly is improved, and the pump body assembly can be ensured to run normally. The structure is simple and easy to process.
As shown in fig. 9, the piston sleeve 40 includes a body 42 and a reduced diameter section 43 connected to the body 42, the reduced diameter section 43 being located between the body 42 and the lower flange 30, and the pump body assembly further includes a limiting plate 60. The limiting plate 60 is located above the lower flange 30 and sleeved outside the reducing section 43, and the limiting plate 60 is in stop fit with the body 42 to limit the piston sleeve 40. Specifically, the reduced diameter section 43 extends toward the lower flange 30 and is embedded in the limiting plate 60, and the body 42 of the piston sleeve 40 is in stop fit with the limiting plate 60 to prevent the piston sleeve 40 from penetrating out of the cylinder 20. The structure is simple and easy to process and realize.
Specifically, the reducing section 43 is of an annular structure, the body 42 is provided with a through hole 41 arranged along the axial direction of the reducing section, the reducing section 43 is coaxially arranged with the through hole 41, the body 42 is in stop fit with the limiting plate 60, and the end face of the reducing section 43 facing the lower flange 30 is in clearance fit with the lower flange 30. In this way, the above assembly mode can avoid large-area friction, reduce friction between the piston sleeve 40 and the lower flange 30, reduce friction power loss, and improve working efficiency of the pump body assembly.
Specifically, the piston sleeve 40 is disposed in the cylinder 20 and then rotated by the rotation of the piston 50 under the driving of the rotation shaft 10. Because the piston 50 is in stop fit with the limiting plate 60 and in clearance fit with the lower flange 30 in the axial direction of the rotating shaft 10, the contact area between the piston sleeve 40 and the limiting plate 60 or the lower flange 30 is effectively reduced, the abrasion of the piston sleeve 40 in the rotating process is further reduced, the friction power consumption loss is reduced, and the working efficiency of the pump body assembly is improved.
In the present embodiment, the body 42 has a guide hole therethrough in a radial direction thereof, and the piston 50 is slidably disposed in the guide hole to perform a reciprocating linear motion. Because the piston 50 is slidably arranged in the guide hole, when the piston 50 moves left and right in the guide hole, the volume of the variable volume cavity can be continuously changed, so that the air suction and exhaust stability of the pump body assembly is ensured.
In the present embodiment, the rotation shaft 10 is eccentrically disposed with respect to the lower flange 30, and the cylinder 20 is eccentrically disposed with respect to the rotation shaft 10 with the eccentricity fixed as e. The cylinder 20, the limiting plate 60 and the lower flange 30 are concentrically arranged. Like this, the cylinder 20 of above-mentioned mode installation can guarantee that the eccentricity of cylinder 20 and pivot 10 is fixed, and then makes piston sleeve 40 and piston 50 have the characteristics that motion stability is good, improves pump body subassembly's working property, job stabilization nature.
Specifically, a cross slide mechanism is formed among the piston 50, the piston sleeve 40, the cylinder 20 and the rotating shaft 10, and the piston 50 slides in the piston sleeve 40 along the direction perpendicular to the axis of the rotating shaft 10, so that the piston 50 slides in the piston sleeve 40 to change the volume of the variable volume cavity, and then the cylinder 20 performs the actions of air suction, compression and air exhaust. The above structure makes the movement of the piston 50 and the piston sleeve 40 in the cylinder 20 more stable and continuous, effectively relieves the vibration of the pump body assembly, ensures the volume change of the variable volume cavity to have regularity, reduces the clearance volume, thereby improving the operation stability of the pump body assembly and further improving the working reliability of the pump body assembly.
As shown in fig. 3, the piston 50 has a sliding hole penetrating along the axial direction of the rotary shaft 10, the rotary shaft 10 passes through the sliding hole, the piston 50 is driven by the rotary shaft 10 to rotate along with the rotary shaft 10 and simultaneously slide reciprocally in the piston sleeve 40 along the axial direction perpendicular to the rotary shaft 10, and the piston 50 moves linearly rather than rotationally reciprocally with respect to the rotary shaft 10, so that the eccentric mass is effectively reduced, the lateral force applied to the rotary shaft 10 and the piston 50 is reduced, the abrasion of the piston 50 is reduced, and the sealing performance of the piston 50 is improved. Meanwhile, the operation stability and reliability of the pump body assembly are guaranteed, the vibration risk of the fluid machinery is reduced, and the structure of the fluid machinery is simplified.
The piston 50 in the present application is cylindrical. Preferably, the piston 50 is cylindrical or non-cylindrical.
As shown in fig. 3, the pump body assembly also includes an upper flange 80 located above the cylinder 20. Wherein, the cylinder 20 is located between the upper flange 80 and the lower flange 30, and the upper and lower flanges are fixedly connected with the cylinder 20 by fasteners. Like this, above-mentioned mounting means makes the structure of pump body subassembly compacter, prevents that gas in the cylinder 20 from taking place to leak, improves the work efficiency of pump body subassembly, promotes the working property of pump body subassembly.
As shown in fig. 3, 4 and 10, the limiting plate 60 has a central through hole 61, the reduced diameter section 43 extends into the central through hole 61 and then cooperates with the limiting plate 60, and a predetermined gap a is provided between the reduced diameter section 43 and the wall of the central through hole 61, and the predetermined gap a is greater than or equal to 0.5mm. Specifically, the reduced diameter section 43 extends into the central through hole 61, and the limiting plate 60 can be kept flush with the outer surface of the cylinder 20, so that the pump body assembly is more attractive in appearance and convenient to process and manufacture. Compared with the prior art that the gap between the diameter-reduced section 43 and the hole wall of the central through hole 61 is smaller, in the embodiment, the central through hole 61 of the limiting plate 60 and the diameter-reduced section 43 have larger gap, so that the limiting plate 60 is prevented from contacting the piston sleeve 40, and the influence of friction between the limiting plate 60 and the piston sleeve on the service life of the pump body assembly is avoided.
As shown in fig. 9, the roughness Ra value of the wall of the via hole 41 is less than 0.5mm. In this way, the above arrangement ensures that a certain roughness exists in the through hole 41, so that a friction pair is formed between the wall of the through hole 41 and the protruding portion 31 of the lower flange 30, and the piston sleeve 40 is ensured to be rotatable in the cylinder 20.
As shown in fig. 4 and 8, the rotating shaft 10 includes a long shaft section 11, a sliding section 12 and a short shaft section 13 connected in sequence, the sliding section 12 is located in the piston sleeve 40, and the short shaft section 13 is inserted into the through hole 311. Like this, slide section 12 and piston 50 cooperation are connected, slide section 12 is located through-hole 311, and then has reduced the span of the minor axis section 13 of pivot 10, has shortened the length of minor axis section 13, and then prevent that minor axis section 13 from taking place deformation, avoid taking place stress concentration and influence the structural stability of two between minor axis section 13 and the protruding portion 31 to improve the operational reliability of pump body subassembly, improve the work efficiency of pump body subassembly.
The length H2 of the stub shaft section 13 in this embodiment is shorter than the length H1 of the stub shaft section 13 in the prior art, which is advantageous in saving production costs. In this way, the above arrangement is advantageous in reducing the deformation of the stub shaft section 13 (the rotating shaft 10), preventing the stress concentration of the stub shaft section 13 (the rotating shaft 10) and the lower flange 30 from being reduced, and further improving the wear condition of the stub shaft section 13 (the rotating shaft 10) and the lower flange 30.
As shown in fig. 3, the sidewall of the cylinder 20 has a vent hole 21, and the pump body assembly further includes a vent valve assembly 70. Wherein the exhaust valve assembly 70 is disposed on the outer surface of the cylinder 20 and corresponds to the position of the exhaust hole 21. In this way, the exhaust valve assembly 70 can effectively avoid a great deal of leakage of gas in the variable-volume cavity, and ensures the compression efficiency of the variable-volume cavity. Specifically, the exhaust valve assembly 70 includes an exhaust valve plate and a valve plate baffle, the exhaust valve plate shields the exhaust hole 21, the valve plate baffle is overlapped on the exhaust valve plate, and only the gas pressure at the exhaust hole 21 is greater than the acting force of the valve plate baffle, the gas in the cylinder 20 can be exhausted, so that the working reliability of the pump body assembly is improved.
In this embodiment, the assembly process of the pump body assembly is as follows: the piston 50 is installed in the guiding hole of the piston sleeve 40, the diameter reduction section 43 is installed on the limiting plate 60, the limiting plate 60 is fixedly connected with the lower flange 30, the cylinder 20 is coaxially installed with the piston sleeve 40, the lower flange 30 is fixedly connected with the cylinder 20, the sliding matching surface of the rotating shaft 10 is matched with a pair of parallel surfaces of the sliding hole of the piston 50, the upper flange 80 is used for fixing the long shaft section 11 of the rotating shaft 10, and the upper flange 80 is fixedly connected with the cylinder, so that the assembly of the pump body assembly is completed. Wherein the slip segment 12 of the spindle 10 is located in the cylinder 20 and the stub shaft segment 13 is located in the projection 31 of the lower flange 30.
As shown in fig. 11, the pump body assembly operates on the principle of a cross slide mechanism, wherein a piston 50 is used as a slide, and a sliding mating surface of a rotating shaft 10 is used as a first connecting rod l 1 The guide hole of the piston bush 40 serves as a second link l 2 . The guide hole and the sliding matching surface are perpendicular to each other, the piston 50 can only reciprocate relative to the guide hole, and the piston 50 can only reciprocate relative to the sliding matching surface. After the piston 50 is simplified to the mass center, the running track of the piston can be found to be circular movement, and the circle is formed by the axis O of the cylinder 20 2 With the axis O of the rotary shaft 10 1 Is a circle of diameter.
When the second connecting rod l 2 The slide block can move along the second connecting rod 2 Reciprocating; at the same time, the sliding block can be arranged along the first connecting rod l 1 And (3) reciprocating. First connecting rod l 1 And a second connecting rod l 2 Always keep vertical, so that the slide block is along the first connecting rod l 1 The reciprocating motion direction and the sliding block are along the second connecting rod l 2 The reciprocating directions are mutually perpendicular. First connecting rod l 1 And a second connecting rod l 2 And the relative movement of the piston 50, form the principle of a cross slide mechanism.
The application also provides a fluid machine (not shown) comprising a pump body assembly as described above. Alternatively, the fluid machine is a compressor.
In the present embodiment, the operation process of the compressor is as follows: the motor drives the rotating shaft 10 to rotate, the rotating shaft 10 drives the piston 50 to rotate, and the piston 50 drives the piston sleeve 40 to rotate. During the above-described movement, the rotation shaft 10 rotates around the center of the through hole 311, the piston sleeve 40 rotates around the center of the circular boss of the lower flange 30, the piston 50 reciprocates only with respect to the piston sleeve 40, the piston 50 reciprocates with respect to the rotation shaft 10, and the two reciprocations are perpendicular to each other. With the reciprocating motion between the piston 50 and the piston sleeve 40, the head cambered surface of the piston 50, the inner surface of the cylinder 20, and the two cavity volumes formed between the guide holes of the piston sleeve 40 gradually change, thus completing the air suction, compression and exhaust processes.
The application also provides a heat exchange device (not shown) comprising a fluid machine as described above.
From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:
the pivot passes cylinder and part pivot and passes the protruding portion on the lower flange, and this part pivot cooperates with the protruding portion, reduces the structural span of pivot in pump body subassembly, prevents that this part pivot from taking place deformation, and then prevents because the pivot takes place the stress concentration phenomenon between pivot and the lower flange that deformation arouses, avoids pivot and lower flange to appear structural wear.
In the operation process of the pump body component, the rotating shaft is matched with the protruding part of the lower flange, so that the rotating shaft is prevented from being deformed, the contact stress between the rotating shaft and the lower flange caused by the deformation of the rotating shaft is prevented from being increased, the rotating shaft and the lower flange are prevented from being structurally worn, the service life of the pump body component is prolonged, the working performance and the working reliability of the pump body component are improved, and the energy loss is reduced.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (9)

1. A pump body assembly, comprising:
a rotating shaft (10);
a cylinder (20), the rotating shaft (10) passing through the cylinder (20);
a lower flange (30) positioned below the cylinder (20), wherein a protruding part (31) is arranged on the end surface of the lower flange (30) facing the cylinder (20), and the protruding part (31) is provided with a through hole (311) for the rotating shaft (10) to pass through;
a piston sleeve (40) pivotally disposed within the cylinder (20), the piston sleeve (40) having a through hole (41) through which the rotating shaft (10) passes, and the protruding portion (31) protruding into the piston sleeve (40) through the through hole (41);
a piston (50) slidably disposed within the piston housing (40) to form a variable volume chamber, the protrusion (31) having a predetermined distance from the piston (50) along an axial direction of the rotating shaft (10);
the piston sleeve (40) comprises a body (42) and a diameter-reducing section (43) connected with the body (42), the diameter-reducing section (43) is positioned between the body (42) and the lower flange (30), and the pump body assembly further comprises:
the limiting plate (60), limiting plate (60) are located the top of lower flange (30) and cover are established outside reducing section (43), limiting plate (60) with body (42) backstop cooperation is in order to right piston sleeve (40) is spacing.
2. Pump body assembly according to claim 1, characterized in that the projection (31) is a circular boss, the outer circular axis of which is arranged coaxially with the outer circular axis of the lower flange (30), and in that the through hole (311) is arranged on the circular boss.
3. Pump body assembly according to claim 2, characterized in that the through hole (311) is arranged eccentrically on the circular boss, and the distance between the axis of the through hole (311) and the outer circular axis of the circular boss is the eccentricity e.
4. Pump body assembly according to claim 1, characterized in that the limiting plate (60) has a central through hole (61), the reduced diameter section (43) is fitted with the limiting plate (60) after extending into the central through hole (61), and a predetermined gap a is provided between the reduced diameter section (43) and the wall of the central through hole (61), and the predetermined gap a is equal to or greater than 0.5mm.
5. Pump body assembly according to claim 1, characterized in that the roughness Ra value of the walls of the through holes (41) is less than 0.5mm.
6. Pump body assembly according to claim 1, characterized in that the rotating shaft (10) comprises a long shaft section (11), a sliding section (12) and a short shaft section (13) which are connected in sequence, the sliding section (12) is located in the piston sleeve (40), and the short shaft section (13) is arranged in the through hole (311) in a penetrating mode.
7. Pump body assembly according to any one of claims 1 to 6, characterized in that the side wall of the cylinder (20) has a vent hole (21), the pump body assembly further comprising:
and a vent valve assembly (70), the vent valve assembly (70) being disposed on an outer surface of the cylinder (20) and corresponding to a position of the vent hole (21).
8. A fluid machine comprising a pump body assembly according to any one of claims 1 to 7.
9. A heat exchange device comprising the fluid machine of claim 8.
CN201810791306.1A 2018-07-18 2018-07-18 Pump body assembly, fluid machinery and heat exchange equipment Active CN108799103B (en)

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Publication number Priority date Publication date Assignee Title
CN109488592B (en) * 2018-12-17 2024-08-30 珠海格力节能环保制冷技术研究中心有限公司 Pump body structure of rotary cylinder piston compressor and rotary cylinder piston compressor
CN109555692B (en) * 2018-12-18 2024-07-12 珠海格力电器股份有限公司 Piston limit structure, compressor and heat exchange equipment

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CN106704182A (en) * 2015-08-07 2017-05-24 珠海格力节能环保制冷技术研究中心有限公司 Fluid machine, heat exchange equipment and running method of fluid machine
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JPH11132173A (en) * 1997-10-23 1999-05-18 Toshiba Corp Fluid compressor
JPH11257268A (en) * 1998-03-10 1999-09-21 Toshiba Corp Helical blade type compressor
JP2000136783A (en) * 1998-11-02 2000-05-16 Toshiba Corp Fluid machine
CN103147987A (en) * 2013-01-29 2013-06-12 珠海格力电器股份有限公司 Double-cylinder rotary compressor and eccentric assembly method thereof
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