CN209959449U - Quality control air bag type clearance stepless regulation actuating mechanism - Google Patents
Quality control air bag type clearance stepless regulation actuating mechanism Download PDFInfo
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- CN209959449U CN209959449U CN201920555536.8U CN201920555536U CN209959449U CN 209959449 U CN209959449 U CN 209959449U CN 201920555536 U CN201920555536 U CN 201920555536U CN 209959449 U CN209959449 U CN 209959449U
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Abstract
The utility model discloses a quality control gasbag formula clearance infinitely variable control actuating mechanism. This quality control gasbag formula clearance infinitely variable control actuating mechanism includes: a housing; the air bag assembly is arranged in the shell, and a shell inner cavity of the shell and the outer surface of the air bag assembly form a clearance volume cavity; and the gas control system is used for controlling the quality of the pre-filled gas in the air bag component. The gas control system includes: the main pipeline is communicated with the interior of the air bag assembly, an air bag cut-off valve and a gas mass flowmeter are arranged on the main pipeline, and the gas mass flowmeter is used for measuring the mass flow of gas passing through the air bag cut-off valve; according to the quality control air bag type clearance stepless adjusting actuating mechanism, the air bag is arranged in the shell, the air bag is pre-filled with a certain mass of gas medium, the gas control system is used for adjusting the mass of the pre-filled gas medium of the air bag, the clearance volume stepless adjustment can be achieved within a certain range, the displacement of the compressor is adjusted, and a piston driving system with a complex structure is not needed.
Description
Technical Field
The utility model belongs to the technical field of reciprocating compressor tolerance is adjusted, in particular to quality control gasbag formula clearance infinitely variable control actuating mechanism.
Background
The rated displacement of the reciprocating compressor is determined in the early stage of the structural design, however, in the actual production, the reciprocating compressor is not always in the full-load working state to meet the production operation requirements, and the displacement needs to be adjusted within a certain range. The clearance adjusting technology changes the volume coefficient of the compressor by adjusting the clearance volume of the compressor cylinder, so as to further realize the adjustment of the displacement of the compressor, and is a common air volume adjusting method with convenient adjustment and reliable performance. The clearance adjusting technology comprises two modes of fixed clearance adjustment and variable clearance adjustment, wherein the fixed clearance volume cavity is arranged on a cylinder cover of a compressor cylinder, and the clearance volume adjustment is controlled by controlling the opening and closing of a clearance valve; in the latter, the cylinder cover of the compressor cylinder is replaced by a clearance adjusting actuating mechanism, so that the stepless adjustment of the clearance volume can be realized, and further the stepless adjustment of the air quantity of the reciprocating compressor can be realized.
The existing clearance adjusting actuating mechanism mainly comprises an actuating mechanism shell, a clearance piston rod, a driving mechanism and the like, and the clearance piston is driven to change the position in a hydraulic, electric, pneumatic, manual and other modes so as to obtain a clearance volume with a proper size and lock the clearance volume. When the clearance piston moves and is adjusted towards the compressor cylinder side, the driving force of the clearance adjusting actuating mechanism needs to be designed according to the highest working pressure (exhaust pressure) of the compressor cylinder to overcome the system friction force and the force of medium pressure in the compressor cylinder acting on the clearance piston, for the clearance piston with a large diameter, the clearance piston rod needs a large driving force to realize clearance adjustment, and the driving mechanism is complex and heavy.
SUMMERY OF THE UTILITY MODEL
The utility model provides a simple structure, adjust convenient, need not to adopt the complicated piston actuating system's of structure quality control gasbag formula clearance infinitely variable control actuating mechanism, solved the problem that exists among the prior art.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be:
a quality control air bag type clearance stepless adjusting actuating mechanism, comprising:
a housing;
the air bag assembly is arranged in the shell, and a clearance volume cavity is formed between the inner cavity of the shell and the outer surface of the air bag assembly;
and the gas control system is used for controlling the mass of the pre-filled gas in the air bag component and adjusting the volume of the air bag by changing the mass of the pre-filled gas.
Preferably, the gas control system comprises:
the main pipeline is communicated with the interior of the air bag assembly, an air bag cut-off valve and a gas mass flowmeter are arranged on the main pipeline, and the gas mass flowmeter is used for measuring the mass flow of gas passing through the air bag cut-off valve;
the utility model discloses an air flow direction's pipeline and pipeline of disappointing with the trunk line intercommunication respectively, be equipped with inflation valve and inflation check valve on the inflation line, the upper reaches and the low reaches position of air flow direction are located respectively to inflation valve and inflation check valve, be equipped with disappointing valve and disappointing check valve on the pipeline of disappointing, the upper reaches and the low reaches position of air flow direction are located respectively to disappointing valve and disappointing check valve.
Preferably, still be equipped with restriction valve and manometer on the trunk line, still be equipped with first relief pressure valve on the gas charging line, still be equipped with the second relief pressure valve on the pipeline of disappointing, the effect is that the process of guaranteeing to fill and disappointing is slow steady.
Preferably, the housing comprises:
a barrel;
the end socket is arranged at one end of the cylinder body, the cylinder body and the end socket are assembled to form a shell inner cavity, and the other end of the cylinder body is communicated with the compressor cylinder.
Preferably, the cylinder body is provided with a mounting flange for connecting with a compressor cylinder; the seal head is provided with an air bag assembly mounting hole for mounting an air bag assembly.
Preferably, the air bag assembly comprises an air bag and an air bag nozzle, and the air bag nozzle is connected with the air bag assembly mounting hole on the sealing head through a sealing element and a locking element so as to fix the air bag in the inner cavity of the shell.
Preferably, the housing is connected to a cooling unit.
Preferably, the cooling unit comprises a jacket and/or fins arranged on the cylinder and/or the end enclosure, and the jacket is provided with a cooling water inlet and a cooling water outlet.
The utility model discloses quality control gasbag formula clearance stepless regulation actuating mechanism's theory of operation as follows:
let the mass of the gas medium for the pre-charging of the air bag be m and the volume of the air bag be V0Air bag pre-fill temperature T0Corresponding pre-charging pressure p of the airbag0The compression factor of the gas medium for the air bag pre-charging is Z0Then there is p0V0＝mZ0RT0。
During the operation of the reciprocating compressor, the pressure of the medium in the cylinder is at the inlet pressure psAnd the discharge pressure pdFluctuates with the minimum working pressure of the air bag being p1Corresponding to a bladder volume of V1(ii) a Maximum working pressure of the air bag is p2Corresponding to a bladder volume of V2. In the working process of the compressor, the pressure change speed of the gas medium pre-filled in the air bag is fast, and the gas medium pre-filled in the air bag is hundreds of times per minute, so that the compressor can be regarded as an adiabatic process.
Let the process index of the medium in the air bag be n, and the instantaneous working pressure of the medium in the air bag be p (p)1≤p≤p2) When the instantaneous working volume of the air bag is V and the corresponding medium compression factor is Z, there are pV ═ mZRT, pVn＝p0V0 n。
The volume V of the air bag can be controlled when the compressor exhausts by adjusting the mass m of the gas medium pre-filled in the air bag2. When the mass of the gas medium is m in the pre-charging of the air bagmaxWhen the compressor sucks air, the volume of the air bag is V1maxThe air bag volume is V when the compressor exhausts2maxThe clearance volume cavity is a minimum volumeProduct VcminCorresponding to the working condition under the initial clearance volume of the compressor.
Reducing the mass m of the pre-charged gaseous medium, which is equivalent to reducing the pre-charge pressure p of the medium0When the compressor is in air intake and exhaust, the air bag volume is reduced, and the volume V of the clearance volume cavitycBecomes larger. Volume change of clearance volume cavity corresponding to exhaust is delta Vc＝Vc-VcminThe volume of the clearance volume cavity influences the displacement of the compressor during the exhaust. The change of the effective volume of the air bag can influence the air suction quantity of the compressor, and the change of the effective volume of the air bag is
The smaller the mass m of the pre-filled gas medium is, the smaller the change of the effective volume of the air bag is; the larger the mass m of the pre-filled gas medium is, the larger the change of the effective volume of the air bag is; maximum change of effective volume of air bag is DeltaVmax＝V0[1-(p1/p2)1/n]。
The pressure in the compressor cylinder is at the inlet pressure p as the compressor piston movessAnd the discharge pressure pdChange in the volume of the air bag at V1And V2To change between.
According to the relevant parameters of the compressor operation condition, the flow regulation range and the like, the proper initial volume V of the air bag can be determined0The quality of the gas medium for the air bag pre-filling is controlled by a gas control system, and the clearance volume can be adjusted in a stepless manner by changing the volume of the air bag within a certain range.
The utility model adopts the above structure, have following advantage:
the utility model discloses do not adopt the piston structure, but at the inside gasbag that sets up of casing to the gaseous medium of certain quality of pre-charge in the gasbag, actuating mechanism's casing internal surface and gasbag surface form clearance volume chamber, and this chamber volume changes along with factors such as compressor cylinder's medium pressure, gasbag pre-charge gaseous medium quality, gasbag volume, operating temperature. The gas control system is utilized to adjust the quality of the gas medium pre-filled in the air bag without changing other factors, so that the stepless adjustment of the clearance volume can be realized within a certain range, the displacement of the compressor is further adjusted, and a piston driving system with a complex structure is not required.
Furthermore, the utility model discloses set up on actuating mechanism's casing and press from both sides the cover, utilize the cooling water to cool off actuating mechanism, can reduce the average temperature of gasbag, improve the isothermal efficiency of compressor.
The whole set of actuating mechanism has the advantages of simple structure, convenience in adjustment, high response speed, safety and reliability.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a housing in embodiment 1 of the present invention;
FIG. 3 is a schematic structural view of an airbag module according to embodiment 1 of the present invention;
fig. 4 is a schematic structural diagram of embodiment 2 of the present invention;
fig. 5 is a schematic structural view of a housing and a cooling unit in embodiment 2 of the present invention;
fig. 6 is a schematic structural diagram of a gas control system in embodiment 3 of the present invention;
fig. 7 is a schematic structural diagram of a gas control system in embodiment 4 of the present invention.
In the figure, 1, a gas control system; 2. a housing; 3. an airbag module; 4. a clearance volume cavity; 1-1, an inflation valve; 1-2, a first pressure reducing valve; 1-3, inflating one-way valves; 1-4, a pressure gauge; 1-5, a flow limiting valve; 1-6, an air bag cut-off valve; 1-7, a gas mass flow meter; 1-8, a gas release valve; 1-9, a second pressure reducing valve; 1-10, air escape one-way valve; 2-1, a shell inner cavity; 2-2, a cylinder body; 2-3, installing a flange; 2-4, sealing the head; 2-5, airbag module mounting holes; 3-1, air bags; 3-2, an air bag nozzle; 3-3, a sealing element; 3-4, a locking element; 5-1, a cooling water inlet; 5-2, a cooling water outlet; 5-3 and a jacket.
The specific implementation mode is as follows:
in order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings.
Example 1:
as shown in fig. 1-3, a quality control air bag type clearance stepless adjustment actuator includes:
a housing 2;
the air bag component 3 is arranged in the shell 2, and a shell inner cavity 2-1 of the shell 2 and the outer surface of the air bag component 3 form a clearance volume cavity 4, so that the clearance volume can be changed by changing the volume of the air bag because the volume of the shell inner cavity 2-1 is a fixed value;
the air bag is generally made by vulcanizing rubber and a fiber reinforced layer, and has high compressive strength, elasticity and air tightness.
The gas control system 1 is used for controlling the quality of the pre-filled gas inside the air bag component, and the quality of the pre-filled gas is changed through online quantitative air filling and air discharging of the air bag component 3, so that the volume of the air bag is adjusted.
The air bag component 3 is filled with a certain mass of pre-charging gas medium, and the pressure in the compressor cylinder is at the inlet pressure p along with the movement of the compressor pistonsAnd the discharge pressure pdChange in the volume of the air bag at V1And V2To change between. The air displacement of the compressor is taken as a feedback parameter, the gas control system 1 is utilized to adjust the quality of the pre-filled gas medium, and the volume of the air bag is changed, so that the clearance volume of the compressor is subjected to stepless adjustment.
The housing 2 includes:
2-2 parts of a cylinder body;
and the end enclosure 2-4 is arranged at one end of the cylinder body 2-2, the cylinder body 2-2 and the end enclosure 2-4 are assembled to form a shell inner cavity 2-1, and the other end of the cylinder body is communicated with a compressor cylinder.
The cylinder body 2-2 is provided with an installation flange 2-3 which is used for being connected with a compressor cylinder; and the end sockets 2-4 are provided with air bag component mounting holes 2-5 for mounting the air bag component 3.
The air bag component 3 comprises an air bag 3-1 and an air bag nozzle 3-2, the air bag nozzle 3-2 is connected with an air bag component mounting hole 2-5 on the seal head 2-4 through a sealing element 3-3 and a locking element 3-4, and the purpose is to fix the air bag 3-1 in the inner cavity 2-1 of the shell.
Specifically, the airbag 3-1 is fixed to the housing by a threaded connection, the sealing element 3-3 may be an O-ring or a gasket, and the locking element 3-4 may be a rubber ring, a support ring, a retainer ring, a compression ring, a lock nut, or the like.
Example 2:
as shown in fig. 4-5, on the basis of embodiment 1, the housing 2 of this embodiment is connected to a cooling unit, the cooling unit includes a jacket 5-3 or fins disposed on the cylinder 2-2 and/or the head 2-4, and the jacket 5-3 is provided with a cooling water inlet 5-1 and a cooling water outlet 5-2. Cooling water enters from the cooling water inlet 5-1 and flows out from the cooling water outlet 5-2, the flow rate of the cooling water and the temperature of the cooling water inlet are controlled to cool the shell of the actuating mechanism, the average temperature of the air bag can be reduced, and the isothermal efficiency of the compressor is improved.
Example 3:
as shown in fig. 6, on the basis of embodiment 1, the gas control system according to the present embodiment includes:
the main pipeline is communicated with the inside of the air bag assembly 3, an air bag cut-off valve 1-6 and a gas mass flowmeter 1-7 are arranged on the main pipeline and are communicated with the inside of the air bag assembly 3, the gas mass flowmeter 1-7 is used for metering the gas mass flow passing through the air bag cut-off valve 1-6, and the quality of the air bag filling and discharging gas can be obtained through integration;
the air charging pipeline is provided with an air charging valve 1-1 and an air charging check valve 1-3, the air charging valve 1-1 and the air charging check valve 1-3 are respectively arranged at the upstream position and the downstream position in the air flow direction, the air discharging pipeline is provided with an air discharging valve 1-8 and an air discharging check valve 1-10, and the air discharging valve 1-8 and the air discharging check valve 1-10 are respectively arranged at the upstream position and the downstream position in the air flow direction.
When the air bag 3 needs to be inflated, a pre-filled gas medium is inflated into the air bag 3-1 through the inflation valve 1-1, the inflation one-way valve 1-3, the gas mass flow meter 1-7 and the air bag cut-off valve 1-6, and the inflation quality is measured and controlled by the gas mass flow meter 1-7; when the air bag 3 needs to be deflated, the pre-filled gas medium is discharged from the air bag 3-1 through the air bag cut-off valve 1-6, the gas mass flow meter 1-7, the air escape valve 1-8 and the air escape one-way valve 1-10, and the air escape mass is measured and controlled by the gas mass flow meter 1-7; at other times, the inflation valve 1-1 and the deflation valve 1-8 are closed.
Example 4:
as shown in fig. 7, on the basis of embodiment 3, the main pipeline of this embodiment is further provided with a flow limiting valve 1-5 and a pressure gauge 1-4, the inflation pipeline is further provided with a first pressure reducing valve 1-2, and the deflation pipeline is further provided with a second pressure reducing valve 1-9, so as to ensure slow and stable inflation and deflation processes.
When the air bag 3 needs to be inflated, a pre-filled gas medium is inflated into the air bag 3-1 through an inflation valve 1-1, a pressure reducing valve 1-2, an inflation one-way valve 1-3, a gas mass flowmeter 1-7, a flow limiting valve 1-5 and an air bag cut-off valve 1-6; when the air bag 3 needs to be deflated, the pre-filled gas medium is discharged from the air bag 3-1 through the air bag cut-off valve 1-6, the flow limiting valve 1-5, the gas mass flowmeter 1-7, the air release valve 1-8, the pressure reducing valve 1-9 and the air release one-way valve 1-10.
The utility model also provides a quality control gasbag formula clearance infinitely variable control method: an air bag is arranged in an inner cavity of an actuating mechanism shell communicated with a compressor cylinder, the volume of the air bag changes along with the mass of pre-charged gas, and the volume of the air bag is adjusted by adjusting the mass of the pre-charged gas in the air bag, so that the size of the clearance volume outside the air bag is changed.
The gas filled in the air bag is working medium or nitrogen or argon in the compressor cylinder.
In the description of the present application, it is to be understood that the terms "central," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be non-detachably connected, or integral to one another; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned specific embodiments can not be regarded as the restriction to the scope of protection of the utility model, to technical personnel in this technical field, it is right the utility model discloses any replacement improvement or transform that embodiment made all fall within the scope of protection of the utility model.
The parts of the present invention not described in detail are the known techniques of those skilled in the art.
Claims (7)
1. A quality control air bag type clearance stepless regulation actuating mechanism is characterized by comprising:
a housing;
the air bag assembly is arranged in the shell, and a shell inner cavity of the shell and the outer surface of the air bag assembly form a clearance volume cavity;
a gas control system for controlling the quality of the pre-charge gas inside the airbag module;
the gas control system includes:
the main pipeline is communicated with the interior of the air bag assembly, an air bag cut-off valve and a gas mass flowmeter are arranged on the main pipeline, and the gas mass flowmeter is used for measuring the mass flow of gas passing through the air bag cut-off valve;
the utility model discloses an air flow direction's pipeline and pipeline of disappointing with the trunk line intercommunication respectively, be equipped with inflation valve and inflation check valve on the inflation line, the upper reaches and the low reaches position of air flow direction are located respectively to inflation valve and inflation check valve, be equipped with disappointing valve and disappointing check valve on the pipeline of disappointing, the upper reaches and the low reaches position of air flow direction are located respectively to disappointing valve and disappointing check valve.
2. The quality control air bag type clearance stepless regulation actuating mechanism is characterized in that a flow limiting valve and a pressure gauge are further arranged on the main pipeline, a first pressure reducing valve is further arranged on the inflation pipeline, and a second pressure reducing valve is further arranged on the deflation pipeline.
3. The mass control air pocket clearance infinitely variable adjustment actuator of claim 1, wherein the housing comprises:
a barrel;
the end socket is arranged at one end of the cylinder body, the cylinder body and the end socket are assembled to form a shell inner cavity, and the other end of the cylinder body is communicated with the compressor cylinder.
4. The mass control air pocket type clearance stepless adjustment actuator of claim 3, wherein a mounting flange is arranged on the cylinder body and is used for connecting with a compressor cylinder; the seal head is provided with an air bag assembly mounting hole for mounting an air bag assembly.
5. The quality control air bag type clearance stepless adjusting actuating mechanism is characterized in that the air bag assembly comprises an air bag and an air bag nozzle, and the air bag nozzle is connected with an air bag assembly mounting hole in the sealing head through a sealing element and a locking element.
6. The quality control air bag clearance stepless adjustment actuator of claim 3, wherein the housing is connected with a cooling unit.
7. The quality control air bag type clearance stepless adjusting actuating mechanism is characterized in that the cooling unit comprises a jacket and/or fins arranged on the cylinder body and/or the end socket, and a cooling water inlet and a cooling water outlet are formed in the jacket.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920555536.8U CN209959449U (en) | 2019-04-22 | 2019-04-22 | Quality control air bag type clearance stepless regulation actuating mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920555536.8U CN209959449U (en) | 2019-04-22 | 2019-04-22 | Quality control air bag type clearance stepless regulation actuating mechanism |
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| CN209959449U true CN209959449U (en) | 2020-01-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915353A (en) * | 2019-04-22 | 2019-06-21 | 山东易阳石化节能装备有限公司 | A kind of quality control gasbag-type clearance step-less adjustment executing agency and method |
-
2019
- 2019-04-22 CN CN201920555536.8U patent/CN209959449U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915353A (en) * | 2019-04-22 | 2019-06-21 | 山东易阳石化节能装备有限公司 | A kind of quality control gasbag-type clearance step-less adjustment executing agency and method |
| CN109915353B (en) * | 2019-04-22 | 2024-03-22 | 山东易阳石化节能装备有限公司 | Quality control air bag type clearance stepless adjustment executing mechanism and method |
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