CN114688002A

CN114688002A - Split diaphragm compressor

Info

Publication number: CN114688002A
Application number: CN202210169401.4A
Authority: CN
Inventors: 贾晓晗; 任省栋; 蒋佳成; 彭学院
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2022-07-01

Abstract

The application discloses split type diaphragm compressor relates to diaphragm compressor technical field. The centering performance of the oil cylinder and the middle body is easy to guarantee, the middle body is not easy to deform, the membrane head assembly is not easy to vibrate, and the single flow of the diaphragm compressor is large. The split diaphragm compressor comprises a crankcase assembly, a middle body assembly and an oil cylinder which are connected in sequence; the oil cylinder is communicated with the oil cavity of at least one membrane head assembly through an oil pipeline; a crank connecting rod component is arranged in the crank case component and the middle body component; a piston assembly is arranged in the oil cylinder; the piston assembly is connected with the crank connecting rod assembly; the crank connecting rod assembly can drive the piston assembly to reciprocate in the oil cylinder; the piston assembly can push hydraulic oil in the oil cylinder to enter the membrane head assembly through an oil pipeline, so that a membrane in the membrane head assembly is forced to make reciprocating bending deformation. The application is used for improving the performance of the diaphragm compressor.

Description

Split diaphragm compressor

Technical Field

The application relates to the technical field of diaphragm compressors, in particular to a split type diaphragm compressor.

Background

The diaphragm compressor is a positive displacement compressor, and is widely applied to the petrochemical field such as a hydrogen station and the like for compressing and conveying various high-purity gases, precious and rare gases, toxic and harmful gases and corrosive gases due to good sealing performance, wide pressure range and large compression ratio.

In the diaphragm compressor in the prior art, a crank-link mechanism drives a piston to move so as to push hydraulic oil to force a diaphragm to deform to complete gas compression, wherein the crank-link mechanism is arranged in a crankcase and a middle body, the piston is arranged in a diaphragm head assembly, and the diaphragm head assembly and the middle body are connected into a whole. In order to ensure the sealing performance of the piston, the membrane head assembly and the middle body need to be well aligned. Especially for a high-flow or high-pressure diaphragm compressor, as the weight of the diaphragm head assembly is extremely large, the centering property between the diaphragm head assembly and the middle body in the assembly is difficult to guarantee. In addition, the overweight membrane head assembly is directly connected with the middle body, and the middle body is easy to deform due to the gravity of the membrane head assembly, so that the requirement on the rigidity of the middle body is high, and meanwhile, the membrane head assembly vibrates violently.

In addition, in the structure of the existing diaphragm compressor, a row of crank connecting rods generally only drive one diaphragm head assembly to work, the diaphragm compressor is limited in diaphragm diameter by the characteristic that a diaphragm deforms and compresses working media, and the volume of a compression cavity of a single diaphragm head cannot be too large, so that the single-machine flow of the diaphragm compressor is generally small.

Disclosure of Invention

In order to solve the technical problem, the embodiment of the application provides a split type diaphragm compressor, the centering performance of the oil cylinder and the middle body is easy to guarantee, the middle body is not easy to deform, the membrane head assembly is not easy to vibrate, and the single flow of the diaphragm compressor is large.

In order to achieve the above object, an embodiment of the present application provides a split diaphragm compressor, which includes a crankcase assembly, a middle body assembly, and an oil cylinder, which are connected in sequence; the oil cylinder is communicated with the oil cavity of at least one membrane head assembly through an oil pipeline; a crank connecting rod component is arranged in the crankcase component and the middle body component; a piston assembly is arranged in the oil cylinder; the piston assembly is connected with the crank connecting rod assembly; the crank connecting rod assembly can drive the piston assembly to reciprocate in the oil cylinder; the piston assembly can push hydraulic oil in the oil cylinder to enter the membrane head assembly through an oil pipeline, so that a membrane in the membrane head assembly is forced to make reciprocating bending deformation.

Further, the membrane head assembly is multiple.

Furthermore, the oil cylinder is a double-acting oil cylinder, and the piston assembly is a differential piston; the membrane head assembly comprises at least one primary membrane head assembly and at least one secondary membrane head assembly; and two oil ports of the oil cylinder are respectively communicated with the primary membrane head assembly and the secondary membrane head assembly.

Furthermore, the number of the primary membrane head assemblies and the number of the secondary membrane head assemblies are multiple.

Further, the oil lines include a primary oil line and a secondary oil line; the oil cylinder is connected with the primary membrane head assembly through a primary oil pipeline; the oil cylinder is connected with the secondary membrane head assembly through a secondary oil pipeline; and the oil cylinder, the primary oil pipeline and the secondary oil pipeline are externally provided with enhanced heat exchange devices.

Further, the heat exchange enhancement device is a fin or a water jacket.

Further, the oil line is a hydraulic hose or a metal line.

Further, a fin or a water jacket is arranged outside the oil pipeline.

Further, the membrane head assembly is fixed to the compressor sled.

Compared with the prior art, the application has the following beneficial effects:

1. the hydro-cylinder that this application embodiment diaphragm compressor will install piston assembly separates from the membrane head subassembly, from this, can only with the hydro-cylinder that weight is lighter and well body coupling, compare need be with whole membrane head subassembly and well body centering among the prior art, the hydro-cylinder that weight is lighter guarantees with the centering nature of well body more easily, and piston assembly's leakproofness is also better.

2. The hydro-cylinder in this application embodiment is direct to be connected with well body, compares among the prior art whole membrane head subassembly all with well body coupling, because the quality of hydro-cylinder is lighter, from this, well body also is difficult for taking place to warp, also reduces by a wide margin to the rigidity requirement of body.

3. A row of crank connecting rods in the embodiment of the application can drive a plurality of membrane head assemblies, and the single flow of a single diaphragm compressor can be greatly improved.

4. The membrane head assembly in the embodiment of the application is independently fixed on the compressor sledge and is communicated with the oil cylinder through an oil pipeline, and the vibration problem of the membrane head assembly is solved.

5. The hydro-cylinder in this application embodiment and oil line all are provided with intensive heat transfer device outward, can strengthen the hydraulic oil heat transfer better, reduce the oil temperature, slow down the ageing of hydraulic oil.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

FIG. 2 is a schematic structural diagram of another embodiment of the present application;

fig. 3 is a schematic structural diagram of another embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

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 otherwise specified.

Referring to fig. 1, an embodiment of the present application provides a split diaphragm compressor including a crankcase assembly 1, a middle body assembly 2, a cylinder 3, and a diaphragm head assembly 4. Wherein, crankcase subassembly 1, midbody subassembly 2 and hydro-cylinder 3 connect gradually, and membrane head subassembly 4 is fixed alone on the compressor sledge or on other stable bases. This prevents the membrane head assembly 4 from vibrating. The oil cylinder 3 can be a single-acting oil cylinder or a double-acting oil cylinder. The oil cylinder 3 communicates with the oil chamber 41 of the die head assembly 4 through an oil line 5. The oil line 5 is a hydraulic hose or a metal line. A crank connecting rod component 6 is arranged in the crank box component 1 and the middle body component 2. And a piston assembly 7 is arranged in the oil cylinder 3, and the piston assembly 7 is connected with the crank connecting rod assembly 6. The crank connecting rod assembly 6 can drive the piston assembly 7 to reciprocate in the oil cylinder 3, the piston assembly 7 can push hydraulic oil in the oil cylinder 3 to further push the hydraulic oil in the oil cavity 41 to enter the membrane head assembly 1 through the oil pipeline 5, and the membrane 42 in the membrane head assembly 4 is forced to make reciprocating bending deformation to realize compression and exhaust of working media.

For the high-pressure diaphragm compressor, because high-pressure oil can generate a large amount of heat in the compression process, and the traditional diaphragm compressor structure cannot effectively exchange heat for the hydraulic oil, the temperature of the hydraulic oil can reach 100 ℃ or even higher, and the aging of the hydraulic oil can be accelerated by overhigh oil temperature. For this reason, in some embodiments, referring to fig. 1, the oil cylinder 3 and the oil line 5 may be provided with an enhanced heat exchange device, and the enhanced heat exchange device may be a fin 8 or a water jacket 9, or may be another heat exchange device, which is not limited herein. Therefore, the heat exchange of the hydraulic oil can be better enhanced, the oil temperature can be reduced, and the aging of the hydraulic oil can be slowed down.

Because the existing diaphragm compressor is generally only used for driving one diaphragm head assembly to work by one crank connecting rod, the diaphragm compressor is limited in diaphragm diameter by the characteristic that a diaphragm deforms and compresses working media, and the volume of a compression cavity of a single diaphragm head cannot be too large, so that the single-machine flow of the existing diaphragm compressor is generally small. To this end, in some embodiments, referring to fig. 2, the membrane head assembly 4 is multiple, e.g., three. It should be noted that the number of the membrane head assemblies 4 may also be two or four, and may be specifically selected according to actual needs, and is not limited herein. The three membrane head assemblies 4 are arranged in parallel, and oil chambers 41 of the three membrane head assemblies are communicated with the oil cylinder 3 through an oil pipeline 5. Thus, since the membrane head assemblies 4 in the embodiment of the present application are individually fixed without being directly connected to the middle body assembly 2, one middle body assembly 2 can correspond to a plurality of membrane head assemblies 4. I.e. a row of crank-link assemblies 6 can drive the movement of the sets of membrane head assemblies 4. This makes it possible to multiply the flow rate of the single diaphragm compressor.

In other embodiments, referring to fig. 3, the cylinder 3 is a double-acting cylinder and the piston assembly 7 is a stepped piston. The membrane head assembly 4 includes at least one primary membrane head assembly 43 and at least one secondary membrane head assembly 44. It should be noted that the number of the primary membrane head assemblies 43 and the secondary membrane head assemblies 44 may be one or more, for example, two, and is not limited herein. The oil line 5 comprises a primary oil line 51 and a secondary oil line 52. One of the oil ports of the oil cylinder 3 is connected with the two primary membrane head assemblies 43 through a primary oil pipeline 51, and the other oil port of the oil cylinder 3 is connected with the two secondary membrane head assemblies 44 through a secondary oil pipeline 52. Therefore, the reciprocating motion of the piston can drive the membrane in the corresponding membrane head assembly 4 to do reciprocating flexural deformation, and the single-machine flow of the membrane compressor can be further increased.

The above is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A split diaphragm compressor is characterized by comprising a crankcase assembly, a middle body assembly and an oil cylinder which are connected in sequence; the oil cylinder is communicated with the oil cavity of at least one membrane head assembly through an oil pipeline;

a crank connecting rod component is arranged in the crankcase component and the middle body component; a piston assembly is arranged in the oil cylinder; the piston assembly is connected with the crank connecting rod assembly; the crank connecting rod assembly can drive the piston assembly to reciprocate in the oil cylinder; the piston assembly can push hydraulic oil in the oil cylinder to enter the membrane head assembly through an oil pipeline, so that a membrane in the membrane head assembly is forced to make reciprocating bending deformation.

2. The split diaphragm compressor of claim 1, wherein the diaphragm head assembly is plural.

3. The split diaphragm compressor of claim 1, wherein the cylinder is a double acting cylinder and the piston assembly is a stepped piston; the membrane head assembly comprises at least one primary membrane head assembly and at least one secondary membrane head assembly; and two oil ports of the oil cylinder are respectively communicated with the primary membrane head assembly and the secondary membrane head assembly.

4. The split diaphragm compressor of claim 3, wherein the number of the primary and secondary diaphragm head assemblies is plural.

5. The split diaphragm compressor of claim 3, wherein the oil line comprises a primary oil line and a secondary oil line; the oil cylinder is connected with the primary membrane head assembly through a primary oil pipeline; the oil cylinder is connected with the secondary membrane head assembly through a secondary oil pipeline.

6. The split type diaphragm compressor according to claim 1, wherein a heat-transfer enhancement device is provided outside the oil cylinder and the oil pipeline.

7. The split diaphragm compressor of claim 6, wherein the enhanced heat exchange means is a fin or a water jacket.

8. The split diaphragm compressor of claim 1, wherein the oil line is a hydraulic hose or a metal line.

9. The split diaphragm compressor of claim 1, wherein the membrane head assembly is secured to a compressor skid.