CN112283072B - Method and system for testing oil quantity of variable frequency compressor pump - Google Patents

Method and system for testing oil quantity of variable frequency compressor pump Download PDF

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Publication number
CN112283072B
CN112283072B CN202011163357.3A CN202011163357A CN112283072B CN 112283072 B CN112283072 B CN 112283072B CN 202011163357 A CN202011163357 A CN 202011163357A CN 112283072 B CN112283072 B CN 112283072B
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China
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oil
crankshaft
hole
pipe
level
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CN202011163357.3A
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CN112283072A (en
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于海鹏
孙备
张亚飞
张建伟
赵金金
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Qingdao Wanbao Compressor Co ltd
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Qingdao Wanbao Compressor Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/12—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F04B39/0207—Lubrication with lubrication control systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Compressor (AREA)

Abstract

The invention discloses a method and a system for testing the oil pumping quantity of a variable frequency compressor, wherein the technical scheme is as follows: inserting a communicating pipe into the tail hole of the crankshaft from the bottom end of the oil suction pipe until one end of the communicating pipe is flush with the oil hole at the lower part and the other end of the communicating pipe is led out of the crankshaft; the oil level is observed through a transparent pipe section positioned outside the crankshaft to determine the difference of the oil pumping capacity of the oil suction pipe and the crankshaft oil groove. According to the invention, the difference of the oil pumping capacities of the oil suction pipe and the crankshaft spiral oil groove is judged by testing the height of the oil level of the refrigerating machine oil stored in the crankshaft tail hole, so that the bottleneck link of an oil pumping system can be identified, and an improvement direction is provided for the improvement of the oil pumping system.

Description

Method and system for testing oil quantity of variable frequency compressor pump
Technical Field
The invention relates to the field of variable frequency compressors, in particular to a method and a system for testing the oil pumping quantity of a variable frequency compressor.
Background
The variable frequency compressor oil pumping system is formed by connecting an oil suction pipe at the bottom and a crankshaft spiral oil groove in series, the oil pump system is a basic guarantee for the lubricating capacity of the variable frequency compressor, refrigerating machine oil is oiled through the oil pump system to lubricate moving parts of the whole machine core, and the size of the oil pumping amount influences the abrasion condition of each part.
The currently adopted oil pumping quantity testing method is a whole machine core testing method, the oil pumping quantity of the whole oil pump in a certain time period is measured in a timing mode, and the design rationality of an oil pump system is judged through the oil pumping quantity. The inventor finds that the good performance of the whole system can be identified through the measurement of the oil pumping quantity of the whole oil pumping system, but the respective oil pumping capacities of an oil suction pipe and a crankshaft spiral oil groove in the oil pumping system cannot be identified, the limiting position for limiting the oil pumping quantity of the oil pumping system cannot be judged, and a clear direction cannot be provided for the improvement of the oil pumping system.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method and a system for testing the pump oil quantity of a variable frequency compressor, which are used for judging the difference of the oil pumping capacities of an oil suction pipe and a crankshaft spiral oil groove by testing the height of the oil level of refrigerating machine oil stored in a crankshaft tail hole, so that the bottleneck link of an oil pumping system can be identified, and the improvement direction is provided for the improvement of the oil pumping system.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, an embodiment of the invention provides a method for testing the oil quantity of a variable-frequency compressor pump, wherein a communicating pipe is inserted into a tail hole of a crankshaft from the bottom end of an oil suction pipe until one end of the communicating pipe is flush with an oil hole at the lower part, and the other end of the communicating pipe is led out of the crankshaft; the oil level is observed through a transparent pipe section positioned outside the crankshaft to determine the difference of the oil pumping capacity of the oil suction pipe and the crankshaft oil groove.
As a further implementation, when the oil pumping capacity of the crankshaft oil groove is smaller than the oil quantity entering from the crankshaft tail hole, the oil level in the crankshaft and the oil level in the transparent pipe section are kept at the same height.
As a further implementation mode, the oil level height of the transparent pipe section is measured through a caliper or the transparent pipe section with scales and is compared with the reference liquid level height.
As a further implementation, the oil outlet position is used as the base liquid level.
As a further implementation manner, when the oil pumping capacity of the oil suction pipe is less than or equal to that of the crankshaft oil groove, the oil level height in the Qu Zhouwei hole is flush with the oil hole at the lower part of the crankshaft; when the oil pumping capacity of the oil suction pipe is larger than that of the crankshaft oil groove, the oil level in the Qu Zhouwei hole is higher than that of the lower oil hole.
In a second aspect, an embodiment of the present invention further provides a system for testing an oil pumping amount of a variable frequency compressor, including an oil pumping system and a communicating pipe, where one end of the communicating pipe extends into a crankshaft of the oil pumping system.
As a further implementation manner, the communicating pipe comprises an observation pipe and a connecting pipe which are connected into a whole, the connecting pipe is connected with the oil suction pipe core, and the observation pipe is positioned outside the crankshaft and is parallel to the crankshaft.
As a further implementation, the viewing tube is a transparent tube.
As a further implementation, the sight tube has a scale.
As a further implementation, the viewing tube is a plastic tube.
The embodiment of the invention has the following beneficial effects:
(1) According to one or more embodiments of the invention, by adding a test mode of the communicating pipe in the oil suction pipe core, the oil level height in the outer transparent pipe is observed in the oil quantity test process of the compressor pump, so that the oil pumping quantity of the oil pump system can be judged according to the total oil pumping quantity, and the oil pumping capacity of the oil suction pipe and the crankshaft oil groove can be judged according to the oil level height of the transparent pipe, so that a direction is provided for improving the oil pumping system;
(2) The transparent tube of one or more embodiments of the present invention has low cost and is easy to replace.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic illustration of the internal structure of an inverter compressor according to one or more embodiments of the present invention;
FIG. 2 is a schematic illustration of a crankshaft configuration according to one or more embodiments of the present disclosure;
wherein, 1, communicating pipe, 2, bent axle oil groove, 3, upper portion oilhole, 4, lower part oilhole, 5, bent axle tail hole.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, 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 invention belongs.
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 invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
The terms "mounted", "connected", "fixed", and the like in the present invention should be understood broadly, and for example, the terms "mounted", "connected", "fixed", and the like may be fixedly connected, detachably connected, or integrated; the two components can be connected mechanically, electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the specific meaning of the terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows:
the embodiment provides a method for testing the oil quantity of a variable frequency compressor pump, as shown in fig. 1 and 2, a communicating pipe 1 is inserted into a tail hole 5 of a crankshaft from the bottom end of an oil suction pipe until one end of the communicating pipe is flush with an oil hole at the lower part, and the other end of the communicating pipe is led out of the crankshaft; the oil level is observed through a transparent section of the tube located outside the crankshaft to determine the difference in pumping capacity between the suction tube and the crankshaft sump 2.
Specifically, the variable frequency compressor oil pumping system belongs to two-stage series oil pump oil supply, and the oil pumping amount of the oil pumping system is equal to that of a bottom oil suction pipe. Because the oil pumping capacity is different due to different structures of two oil pumps connected in series, the following two situations can occur:
when the oil pumping capacity of the bottom oil suction pipe is less than or equal to the oil pumping capacity of the crankshaft oil groove 2 (spiral oil groove), the refrigerating machine oil pumped to the tail end of the crankshaft oil groove 2 by the oil suction pipe can be taken away by the crankshaft oil groove 2, and the oil level in the crankshaft tail hole 5 is flush with the crankshaft lower oil hole 4 (as shown in fig. 2, the oil hole at the upper end of the spiral oil groove 2 is the upper oil hole 3, and the oil hole at the lower end is the lower oil hole 4).
When the oil pumping capacity of the oil suction pipe is larger than that of the crankshaft oil groove 2, the refrigerating machine oil pumped to the tail end of the crankshaft oil groove 2 cannot be taken away by the crankshaft oil groove 2 in time, the oil level height in the crankshaft tail hole 5 can be increased, the increase of the oil level height can change a negative oil pressure of the bottom spiral oil suction pipe to reduce the oil pumping capacity of the bottom oil suction pipe, and meanwhile, a positive oil pressure is supplied to the inlet of the crankshaft oil groove 2 to increase the oil pumping capacity of the crankshaft oil groove 2. Thereby equalizing the amount of oil pumped between the two. At the moment, the height of the oil level in the tail hole 5 of the crankshaft of the oil suction pipe is higher than that of the oil hole 4 at the lower part of the crankshaft.
Therefore, the difference of the oil pumping capacities of the oil suction pipe and the crankshaft oil groove 2 can be determined by testing the height of the oil level at the bottom of the crankshaft tail hole 5 relative to the lower oil hole 4.
Because the crankshaft is not transparent, the oil level height at the bottom of the crankshaft tail hole 5 cannot be directly observed, so that the communicating pipe 1 is inserted into the crankshaft tail hole 5 from the bottom end of the oil suction pipe, and the oil level height in the crankshaft tail hole 5 is observed according to the principle of a communicating vessel.
One end of the communicating pipe 1 is flush with the lower oil hole 4 in the crankshaft, and the other end of the communicating pipe is led out of the crankshaft to observe the height of the oil liquid level; the pipe section positioned outside the crankshaft is a transparent pipe section. In the rotation process of the compressor, the refrigerating machine oil enters from the crankshaft tail hole 5, and when the oil level reaches the lower oil hole 4 of the crankshaft oil groove 2, the refrigerating machine oil enters the crankshaft oil groove 2 through the lower oil hole 4, so that oil is supplied for lubrication of the whole compressor.
Because frequency conversion compressor rotational speed scope is wide, along with the rising of rotational speed, when the refrigerator oil mass that the bent axle oil groove 2 pump oil ability got into is less than the bent axle afterbody, the oil liquid level in the bent axle tail hole 5 can rise, along with the oil liquid level in the bent axle tail hole 5 rises, communicating pipe 1 is because the effect of pressure, the oil liquid level in the bent axle can keep at the same height with the oil liquid level in the transparent pipeline section of outside, through slide caliper rule or transparent pipeline section from taking the scale measurement transparent pipeline section oil liquid level height and with the contrast of benchmark liquid level height, reflect the pump oil ability difference of compressor two-stage screw pump.
Further, the pipe orifice of the pipe section connected with the oil pumping system of the communicating pipe 1 is flush with the oil suction pipe core, and the zero point is judged by taking the position of the oil outlet as the basic liquid level.
The testing method of the embodiment can judge the oil pumping amount of the oil pumping system through the total oil pumping amount, and can judge the oiling capacity of the oil suction pipe and the crankshaft oil groove according to the oil level height of the transparent pipe section, so that the direction is provided for improving the oiling system.
Example two:
this embodiment provides a frequency conversion compressor pump oil mass test system, as shown in fig. 1, including pump oil system and communicating pipe 1, the one end of communicating pipe 1 stretches into inside the bent axle of pump oil system.
Furthermore, the communicating pipe 1 is a bent pipe and comprises an observation pipe and a connecting pipe which are connected into a whole, the connecting pipe is provided with a horizontal section and a vertical section, one end of the horizontal section of the connecting pipe is connected with the observation pipe, and the observation pipe is perpendicular to the horizontal section; the observation tube is positioned outside the crankshaft and is parallel to the crankshaft; the other end of the horizontal section is connected with the oil suction pipe core.
In this embodiment, the observation tube is a transparent tube, and the observation tube has scales; and judging the oiling capacity of the oil suction pipe and the spiral oil groove through the height of the oil level in the transparent pipe. Preferably, the observation tube is a plastic tube, and the plastic tube is low in cost and easy to replace and operate.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. A method for testing the oil mass of a variable frequency compressor pump is characterized in that a communicating pipe is inserted into a tail hole of a crankshaft from the bottom end of an oil suction pipe until one end of the communicating pipe is flush with an oil hole at the lower part, and the other end of the communicating pipe is led out of the crankshaft; observing the oil level height through a transparent pipe section positioned outside the crankshaft to determine the difference of oil pumping capacities of the oil suction pipe and the crankshaft oil groove;
when the oil pumping capacity of the crankshaft oil groove is smaller than the oil amount entering the crankshaft tail hole, the oil level in the crankshaft and the oil level in the transparent pipe section are kept at the same height;
an oil pumping system of the variable frequency compressor belongs to two-stage series oil pumps for supplying oil, and the oil pumping quantity of the oil pumping system is equal to that of a bottom oil suction pipe;
because the oil pumping capacity is different due to different structures of the two-stage series oil pumps, the following two situations can occur:
when the oil pumping capacity of the oil suction pipe is less than or equal to that of the crankshaft oil groove, the height of the oil level in the Qu Zhouwei hole is flush with the oil hole at the lower part of the crankshaft; when the oil pumping capacity of the oil suction pipe is larger than that of the crankshaft oil groove, the height of the oil level in the Qu Zhouwei hole is higher than that of the lower oil hole.
2. The method for testing the pumping capacity of the variable-frequency compressor as claimed in claim 1, wherein the oil level of the transparent pipe section is measured by a caliper or the transparent pipe section with scales and compared with a reference level.
3. The variable frequency compressor pump oil quantity test method according to claim 2, characterized in that the oil outlet position is used as a reference liquid level.
CN202011163357.3A 2020-10-27 2020-10-27 Method and system for testing oil quantity of variable frequency compressor pump Active CN112283072B (en)

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CN202011163357.3A CN112283072B (en) 2020-10-27 2020-10-27 Method and system for testing oil quantity of variable frequency compressor pump

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Application Number Priority Date Filing Date Title
CN202011163357.3A CN112283072B (en) 2020-10-27 2020-10-27 Method and system for testing oil quantity of variable frequency compressor pump

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CN112283072B true CN112283072B (en) 2022-10-14

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2341850A1 (en) * 1976-02-19 1977-09-16 Siers Liquid level measurement compensating manometer - applies density correction for differing liquids by varying area manometric liquid to maintain constant volume
US9404488B2 (en) * 2013-02-19 2016-08-02 Wabtec Holding Corp. Pressurized oil delivery system for a reciprocating air compressor
CN104422489A (en) * 2013-08-23 2015-03-18 标致雪铁龙(中国)汽车贸易有限公司 Measuring device for measuring oil consumption of oil lubricating equipment
CN108980026B (en) * 2018-09-27 2023-09-12 青岛万宝压缩机有限公司 Oil quantity testing device for crankshaft of refrigerator compressor

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