Middle body assembly of diaphragm compressor

Abstract

The utility model discloses a middle body assembly of a diaphragm compressor, which relates to the technical field of diaphragm compressors, and comprises a main body, a sleeve and a crosshead assembly, and the main body is provided with a fixing hole along the axial direction of the main body; the sleeve is mounted in the fixing hole; the crosshead assembly comprises a cross-shaped body and sliding shoes, the sliding shoes are arranged on the two sides of the cross-shaped body, the outer walls of the sliding shoes are in sliding fit with the radial inner wall of the sleeve, the cross-shaped body is provided with an installation part, the installation part extends in the length direction of the cross-shaped body, and the sliding shoes are installed on the cross-shaped body. The sleeve is installed in the fixing hole of the body, the crosshead assembly is slidably connected to the sleeve, and the outer wall of the sliding shoe is slidably matched with the radial inner wall of the sleeve. In the using process, after the sleeve is abraded, the sleeve can be independently replaced without replacing the main body, maintenance and replacement are convenient, and the maintenance cost is saved. Due to the fact that the cross-shaped body and the sliding shoe of the crosshead assembly are in a split type, the sliding shoe or the cross-shaped body can be replaced independently after being abraded, the whole crosshead assembly does not need to be replaced, maintenance and replacement of the crosshead assembly are facilitated, and maintenance cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm compressors, and particularly relates to a middle body assembly of a diaphragm compressor. Background Art

[0002] A diaphragm compressor is a positive displacement compressor that separates the oil chamber and the gas chamber by means of a diaphragm. With the continuous improvement of the performance requirements of diaphragm compressors, realizing their high-speed development is an important research direction. At present, the middle body and the crosshead body are important parts of the diaphragm compressor. The main function of the middle body is to support and fix other key components, and the crosshead body reciprocates within the middle body. In high-speed application scenarios, the middle body and the crosshead assembly are prone to wear. After the middle body and the crosshead assembly are damaged, they need to be replaced as a whole, which is not conducive to cost savings. Content of the Utility Model

[0003] An object of the utility model is to at least solve one of the technical problems existing in the prior art, and provide a middle body assembly of a diaphragm compressor, which is convenient for the maintenance and replacement of the middle body and the crosshead assembly, and saves the maintenance cost.

[0004] According to an embodiment of the utility model, a middle body assembly of a diaphragm compressor is provided, including: a main body, a sleeve and a crosshead assembly. The main body is provided with a fixing hole along its axial direction; the sleeve is installed in the fixing hole; the crosshead assembly includes a cross body and slippers. Slippers are provided on both sides of the cross body. The outer wall of the slipper is slidably matched with the radial inner wall of the sleeve. The cross body is provided with an installation part, and the installation part extends along the length direction of the cross body. The slipper is installed on the cross body.

[0005] The middle body assembly of a diaphragm compressor according to the utility model has at least the following beneficial effects: the sleeve is installed in the fixing hole of the main body, the crosshead assembly is slidably connected to the sleeve, and the outer wall of the slipper is slidably matched with the radial inner wall of the sleeve. During use, after the sleeve is worn, the sleeve can be replaced separately without replacing the main body, which is convenient for maintenance and replacement and saves the maintenance cost. Since the cross body and the slippers of the crosshead assembly are separated, after the slipper or the cross body is worn, they can be replaced separately without replacing the whole, which is convenient for the maintenance and replacement of the crosshead assembly and saves the maintenance cost.

[0006] According to the middle body assembly of a diaphragm compressor described in the utility model, the installation part is provided with a first through hole, the wall surface of the slipper facing away from the sleeve is provided with an installation hole, and fasteners are arranged in the installation hole and the first through hole.

[0007] A middle body assembly of a diaphragm compressor according to the present utility model, wherein a main oil passage and a plurality of sub-oil passages are provided on an outer wall surface of the sliding shoe, the main oil passage communicates with the plurality of sub-oil passages, the main oil passage extends along a length direction of the sliding shoe, the sub-oil passages extend along a width direction of the sliding shoe, and the plurality of sub-oil passages are arranged at intervals along the length direction of the sliding shoe.

[0008] A middle body assembly of a diaphragm compressor according to the present utility model, wherein the sliding shoe is provided with an oil drain hole, the oil drain hole communicates with one of the sub-oil passages, the cross body is provided with a lubrication passage, and two ends of the lubrication passage communicate with the oil drain holes of the two sliding shoes respectively.

[0009] A middle body assembly of a diaphragm compressor according to the present utility model, wherein the cross body is provided with a connection hole for installing a connecting rod. Along a height direction of the cross body, the lubrication passage includes a first passage, an annular groove and a second passage which are sequentially communicated, and the annular groove is located on an inner wall of the connection hole.

[0010] A middle body assembly of a diaphragm compressor according to the present utility model, wherein the main body is provided with a first oil inlet hole, the sleeve is provided with a second oil inlet hole, the first oil inlet hole and the second oil inlet hole are conducted, and the second oil inlet hole and the main oil passage of one of the sliding shoes are conducted.

[0011] A middle body assembly of a diaphragm compressor according to the present utility model, wherein the main body is provided with a third oil inlet hole, the sleeve is provided with a fourth oil inlet hole, the third oil inlet hole and the fourth oil inlet hole are conducted, and along a circumferential direction of the main body, the first oil inlet hole and the third oil inlet hole are arranged at intervals.

[0012] A middle body assembly of a diaphragm compressor according to the present utility model, wherein an oil drain passage is provided on an inner wall of the fixing hole, the oil drain passage extends along an axial direction of the main body to an end face of the main body, the sleeve is provided with an oil drain port, and the oil drain port communicates with the oil drain passage.

[0013] A middle body assembly of a diaphragm compressor according to the present utility model, wherein the main body is provided with a first window, the sleeve is provided with a first communication port, the first communication port corresponds to the first window, and the first window is covered with a transparent cover plate.

[0014] A middle body assembly of a diaphragm compressor according to the present utility model, wherein the main body is provided with a second window, the sleeve is provided with a second communication port, the second communication port corresponds to the second window, and a breather is installed in the second window, and the breather is used to maintain pressure balance.

[0015] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Brief Description of the Drawings

[0016] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0017] Figure 1 Is an axonometric view of the middle body assembly of a diaphragm compressor in an embodiment of the present utility model;

[0018] Figure 2 Is an exploded view of the middle body assembly of a diaphragm compressor in an embodiment of the present utility model;

[0019] Figure 3 Is a structural schematic diagram of the middle body assembly of a diaphragm compressor in an embodiment of the present utility model;

[0020] Figure 4 Is Figure 3 A partial enlarged view of part A in

[0021] Figure 5 Is an exploded view of the crosshead assembly in an embodiment of the present utility model;

[0022] Figure 6 Is a top view of the crosshead assembly in an embodiment of the present utility model;

[0023] Figure 7 Is Figure 6 A sectional view taken along B-B in

[0024] Figure 8 Is an axonometric view of the main body in an embodiment of the present utility model;

[0025] Figure 9 Is an axonometric view of the sleeve in an embodiment of the present utility model.

[0026] Reference Numerals:

[0027] Main body 100; fixing hole 101; first oil inlet hole 102; third oil inlet hole 103; oil discharge channel 104; first window 105; second window 106; mounting groove 107;

[0028] Sleeve 200; second oil inlet hole 201; fourth oil inlet hole 202; oil discharge port 203; first communication port 204; second communication hole 205; circumferential groove 206; mounting ring 207;

[0029] Crosshead assembly 300; crosshead body 310; mounting part 311; first through hole 312; lubrication channel 313; first channel 3131; annular groove 3132; second channel 3133; connecting hole 314; slipper 320; mounting hole 321; main oil passage 322; sub-oil passage 323; oil drain hole 324;

[0030] Transparent cover plate 400;

[0031] Breather 500. Detailed implementation manners

[0032] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.

[0033] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the present utility model.

[0034] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or the sequence relationship of the indicated technical features.

[0035] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0036] Refer to Figure 1 、 Figure 2 and Figure 3, an embodiment of the present utility model provides a middle body assembly of a diaphragm compressor, including a main body 100, a sleeve 200, and a crosshead assembly 300. The main body 100 is provided with a fixing hole 101 along its axial direction, and the sleeve 200 is installed in the fixing hole 101. The crosshead assembly 300 includes a cross body 310 and slippers 320. Slippers 320 are provided on both sides of the cross body 310. The crosshead assembly 300 is slidably connected to the inner wall of the sleeve 200, and the outer wall of the slipper 320 is slidably fitted to the radial inner wall of the sleeve 200. The cross body 310 is provided with an installation portion 311, and the installation portion 311 extends along the length direction of the cross body 310. The slipper 320 is installed on the cross body 310. Since the sleeve 200 is installed in the fixing hole 101 and the crosshead assembly 300 is slidably fitted to the sleeve 200, after the sleeve 200 is worn and damaged, the sleeve 200 can be replaced separately without replacing the main body 100, which is convenient for the maintenance and replacement of the middle body assembly and saves the maintenance cost. By installing the slipper 320 on the cross body 310, that is, the cross body 310 and the slipper 320 of the crosshead assembly 300 are split type. After the slipper 320 or the cross body 310 is worn and damaged, the slipper 320 or the cross body 310 can be replaced separately without replacing the entire crosshead assembly 300, which is convenient for the maintenance and replacement of the crosshead assembly 300 and saves the maintenance cost.

[0037] Referring to Figure 2 and Figure 5 , in some embodiments of the present utility model, the cross body 310 is provided with an installation portion 311, the installation portion 311 extends along the length direction of the cross body 310, the installation portion 311 is provided with a first through hole 312, the wall surface of the slipper 320 facing away from the sleeve 200 is provided with an installation hole 321, and fasteners are provided in the installation hole 321 and the first through hole 312 to install the slipper 320 on the cross body 310, realizing the detachable installation of the slipper 320 on the cross body 310. It can be understood that the installation hole 321 is a blind hole, and the orifice of the installation hole 321 is located on the wall surface of the slipper 320 facing away from the sleeve 200. Since the installation hole 321 is located on the wall surface of the slipper 320 facing away from the sleeve 200, the installation hole 321 is far from the wear surface of the slipper 320, avoiding the deformation of the installation portion 311 of the slipper 320 and the cross body 310 caused by the wear and deformation of the slipper 320 and the sleeve 200, and further avoiding the difficulty of detaching the damaged slipper 320, which is convenient for the maintenance and disassembly of the cross body 310 and the slipper 320 and saves the maintenance cost.

[0038] It can be understood that the inner walls of the first through hole 312 and the installation hole 321 are respectively provided with threads, the fastener is a bolt, and the fastener is threadedly connected to the first through hole 312 and the installation hole 321 respectively. The fastener can also be a pin, and the fastener and the first through hole 312 and the installation hole 321 are in interference fit. The connection method of the fastener to the first through hole 312 and the installation hole 321 can be selected according to the implementation application, and the present application does not limit it here.

[0039] Reference Figure 5 and Figure 6 In some embodiments of the present utility model, a main oil passage 322 and a plurality of sub - oil passages 323 are provided on the outer wall surface of the slipper 320. The main oil passage 322 communicates with the plurality of sub - oil passages 323. The main oil passage 322 extends along the length direction of the slipper 320, and the sub - oil passages 323 extend along the width direction of the slipper 320. The plurality of sub - oil passages 323 are arranged at intervals along the length direction of the slipper 320. Since the main oil passage 322 communicates with the plurality of sub - oil passages 323, the main oil passage 322 and the plurality of sub - oil passages 323 are interconnected. Since the main oil passage 322 extends along the length direction of the slipper 320 and the sub - oil passages 323 extend along the width direction of the slipper 320, it ensures the full lubrication of the outer wall surface of the slipper 320 and improves the lubrication efficiency.

[0040] Reference Figure 4 and Figure 7 In some embodiments of the present utility model, an oil drain hole 324 is provided on the slipper 320 along its height direction. The oil drain hole 324 communicates with one of the sub - oil passages 323. The cross body 310 is provided with a lubrication passage 313. The two ends of the lubrication passage 313 communicate with the oil drain holes 324 of the two slippers 320 respectively, so as to ensure the lubrication of the outer wall surfaces of the two slippers 320, and further ensure the lubrication of the crosshead assembly 300 and the sleeve 200.

[0041] Reference Figure 4 and Figure 7 In some embodiments of the present utility model, a connection hole 314 is provided on the cross body 310 along its width direction. The connection hole 314 is used for installing the connecting rod. Along the height direction of the cross body 310, the lubrication passage 313 includes a first passage 3131, an annular groove 3132 and a second passage 3133 which are connected in sequence. The annular groove 3132 is located on the inner wall of the connection hole 314. It can be understood that the connecting rod is provided with a connection passage which is connected to the annular groove 3132. Lubricating oil can enter the connection passage through the lubrication passage 313 to lubricate other components connected by the connecting rod and ensure the lubrication of the components. By arranging the annular groove 3132 on the inner wall of the connection hole 314, it ensures that the lubrication enters the connection passage. At the same time, it enables the lubricating oil of the two slippers 320 to communicate with each other, facilitating the communication between the lubrications of the crosshead assembly 300 and ensuring the lubrication effect and improving the lubrication efficiency.

[0042] Reference Figure 3 、 Figure 8 and Figure 9, in some embodiments of the present utility model, the main body 100 is provided with a first oil inlet hole 102, the sleeve 200 is provided with a second oil inlet hole 201, the first oil inlet hole 102 and the second oil inlet hole 201 are in communication, and the second oil inlet hole 201 is in communication with the main oil passage 322 of one of the slippers 320. Since the first oil inlet hole 102 and the second oil inlet hole 201 are in communication, the oil can enter the inner wall of the sleeve 200 from the first oil inlet hole 102 and the second oil inlet hole 201. Since the second oil inlet hole 201 is in communication with the main oil passage 322 of one of the slippers 320, the lubricating oil enters the main oil passage 322 from the second oil inlet hole 201, and then the lubricating oil reaches the outer wall surface of the slipper 320 to ensure the lubrication between the slipper 320 and the sleeve 200. It can be understood that the main oil passage 322 communicates with a plurality of sub-oil passages 323, the lubricating oil enters the main oil passage 322 from the second oil inlet hole 201, and the lubricating oil flows into the plurality of sub-oil passages 323 through the main oil passage 322, improving the flow efficiency of the lubricating oil and facilitating the distribution of the lubricating oil.

[0043] Referring to Figure 3 , Figure 8 and Figure 9 , in some embodiments of the present utility model, the main body 100 is provided with a third oil inlet hole 103, the sleeve 200 is provided with a fourth oil inlet hole 202, the third oil inlet hole 103 and the fourth oil inlet hole 202 are in communication, and along the circumferential direction of the main body 100, the first oil inlet hole 102 and the third oil inlet hole 103 are arranged at intervals. Since the third oil inlet hole 103 and the fourth oil inlet hole 202 are in communication, the oil can enter the inner wall of the sleeve 200 from the third oil inlet hole 103 and the fourth oil inlet hole 202. Since along the circumferential direction of the main body 100, the first oil inlet hole 102 and the third oil inlet hole 103 are arranged at intervals, the lubricating oil enters the inner wall of the sleeve 200 from the fourth oil inlet hole 202, increasing the lubrication of the inner wall of the sleeve 200, ensuring the lubrication between the sleeve 200 and the crosshead assembly 300, and improving the lubrication efficiency.

[0044] Referring to Figure 8 and Figure 9 , in some embodiments of the present utility model, an oil drain passage 104 is provided on the inner wall of the fixing hole 101, the oil drain passage 104 extends along the axial direction of the main body 100 to the end face of the main body 100, and the sleeve 200 is provided with an oil drain port 203, and the oil drain port 203 communicates with the oil drain passage 104. The lubricating oil enters the oil drain passage 104 through the oil drain port 203, and then is discharged from the main body 100 through the oil drain passage 104, realizing the circulation of the lubrication in the middle body assembly, so that the lubricating oil containing wear impurities can be discharged from the main body 100 to maintain the good lubrication state of the middle body assembly and prevent the accumulation of wear impurities.

[0045] It can be understood that the number of oil drainage channels 104 can be multiple. The multiple oil drainage channels 104 are arranged at intervals along the circumferential direction of the main body 100, and the oil drainage ports 203 are communicated with the multiple oil drainage channels 104. The number of the oil drainage channels 104 can be selected according to actual production applications, and the present application does not limit this here.

[0046] Referring to Figure 3 、 Figure 8 and Figure 9 , in some embodiments of the present utility model, the main body 100 is provided with a first window 105, the sleeve 200 is provided with a first connection port, the first connection port corresponds to the first window 105, and a transparent cover plate 400 is installed to cover the first window 105. Through the transparent cover plate 400, the state inside the sleeve 200 and the crosshead assembly 300 can be observed, the state of the lubricating oil can be observed, which is convenient for timely replacement after the crosshead assembly 300 and the sleeve 200 are damaged, and is also convenient for the replacement of the lubricating oil, improving the maintenance and repair efficiency.

[0047] Referring to Figure 3 、 Figure 8 and Figure 9 , in some embodiments of the present utility model, the main body 100 is provided with a second window 106, the sleeve 200 is provided with a second connection port, the second connection port corresponds to the second window 106, and a breather 500 is installed on the second window 106. The breather 500 is used to maintain pressure balance. By installing the breather 500 through the second window 106, when the diaphragm compressor is in a high-speed state, it is convenient for the pressure balance inside the sleeve 200, avoiding a sharp change in the pressure inside the sleeve 200 and ensuring the stability of the system.

[0048] Referring to Figure 9 , in some embodiments of the present utility model, a circumferential groove 206 is provided on the outer peripheral wall of the sleeve 200, and the circumferential groove 206 is arranged along the circumferential direction of the sleeve 200. By providing the circumferential groove 206 on the outer peripheral wall of the sleeve 200, it is convenient to install the sleeve 200 in the fixing hole 101, improving the installation convenience of the sleeve 200.

[0049] Referring to Figure 8 and Figure 9 , in some embodiments of the present utility model, one end of the sleeve 200 is provided with an installation ring 207, the installation ring 207 is arranged along the circumferential direction of the sleeve 200, the main body 100 is provided with an installation groove 107, and the installation ring 207 is located in the installation groove 107 to achieve positioning during the installation of the sleeve 200, facilitating the installation of the sleeve 200. It can be understood that the installation groove 107 and the installation ring 207 are connected by bolts to fix and install the sleeve 200 on the main body 100.

[0050] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0051] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A mid-body assembly of a diaphragm compressor, characterized in that: include: A main body, provided with a fixing hole along its axial direction; A sleeve, mounted in the fixing hole; The crosshead assembly comprises a cross body and a sliding shoe, the sliding shoe is provided on both sides of the cross body, the outer wall of the sliding shoe is slidably matched with the radial inner wall of the sleeve, the cross body is provided with a mounting portion, the mounting portion extends along the length direction of the cross body, and the sliding shoe is installed on the cross body; the outer wall surface of the sliding shoe is provided with a main oil channel and a plurality of branch oil channels, the main oil channel is connected to a plurality of branch oil channels, the main oil channel extends along the length direction of the sliding shoe, the branch oil channel extends along the width direction of the sliding shoe, and the plurality of branch oil channels are arranged at intervals along the length direction of the sliding shoe; the sliding shoe is provided with an oil drain hole, the oil drain hole is connected to one of the branch oil channels, the cross body is provided with a lubrication channel, and the two ends of the lubrication channel are respectively connected to the oil drain holes of the two sliding shoes; the cross body is provided with a connecting hole, the connecting hole is used to install a connecting rod, and along the height direction of the cross body, the lubrication channel comprises a first channel, an annular groove and a second channel that are connected in sequence, and the annular groove is located on the inner wall of the connecting hole.

2. A middle body assembly of a diaphragm compressor according to claim 1, characterized in that: The mounting portion is provided with a first through hole, the wall surface of the sliding shoe away from the sleeve is provided with a mounting hole, and fasteners are provided in the mounting hole and the first through hole.

3. A middle body assembly of a diaphragm compressor according to claim 1, characterized in that: The main body is provided with a first oil inlet hole, the sleeve is provided with a second oil inlet hole, the first oil inlet hole is communicated with the second oil inlet hole, and the second oil inlet hole is communicated with the main oil passage of one of the sliding shoes.

4. A middle body assembly of a diaphragm compressor according to claim 3, characterized in that: The main body is provided with a third oil inlet hole, the sleeve is provided with a fourth oil inlet hole, the third oil inlet hole is communicated with the fourth oil inlet hole, and along the circumference of the main body, the first oil inlet hole and the third oil inlet hole are arranged at intervals.

5. A middle body assembly of a diaphragm compressor according to claim 1, characterized in that: The inner wall of the fixing hole is provided with an oil drainage passage, and the oil drainage passage extends along the axial direction of the main body to the end surface of the main body. The sleeve is provided with an oil drainage port, and the oil drainage port is connected to the oil drainage passage.

6. A middle body assembly of a diaphragm compressor according to claim 1, characterized in that: The main body is provided with a first window, the sleeve is provided with a first communication port, the first communication port corresponds to the first window, and the first window is covered with a transparent cover plate.

7. A middle body assembly of a diaphragm compressor according to claim 1, characterized in that: The main body is provided with a second window, the sleeve is provided with a second communication port, the second communication port corresponds to the second window, a respirator is installed on the second window, and the respirator is used to maintain pressure balance.

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