Pump body assembly and rotor compressor

Abstract

The invention provides a pump body assembly and a rotor compressor. The pump body assembly comprises an air cylinder and a flange. The air cylinder is provided with a compression cavity provided with a roller and a sliding groove provided with a sliding piece. The head of the sliding groove communicates with the compression cavity, and the tail of the sliding groove is provided with an air storage cavity communicating with the sliding groove. The flange is arranged at one axial end of the cylinder, and an exhaust cavity is formed in one side, away from the cylinder, of the flange; the flange and the air cylinder jointly form a first flow path and a second flow path, and the first flow path communicates with the compression cavity and the exhaust cavity and is used for exhausting compressed gas to the exhaust cavity; the second flow path is communicated with the exhaust cavity and the gas storage cavity and is used for conveying part of gas in the exhaust cavity to the gas storage cavity; gas in the gas storage cavity acts on the tail part of the slip sheet, so that the head part of the slip sheet is kept abutting against the roller; compared with a conventional roller and slip sheet hinged structure, the self-rotation motion of the roller is not limited, and abnormal abrasion between the end face of the roller and the partition plate is remarkably reduced; and gas leakage from the high-pressure cavity to the low-pressure cavity is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of compressors, and particularly relates to a pump body assembly and a rotary compressor. BACKGROUND

[0002] Rotary compressors are widely used in air treatment equipment due to their simple structure and low cost. In the pump body assembly of a rotary compressor, a roller is arranged in a compression chamber of a cylinder, and a sliding vane is arranged in a sliding slot of the cylinder. The sliding vane usually slides along the sliding slot under the joint action of the roller and a spring, so as to realize the functions of air suction and air exhaust of the cylinder.

[0003] With the development of rotary compressors towards high efficiency, the cylinder tends to be flat in design. At the same time, in order to reduce the cost, the outer diameter of the cylinder tends to be small. These design trends seriously limit the axial and radial space of the sliding slot, making it difficult for the traditional structure relying on the spring to push the sliding vane to be realized. If the sliding vane is designed to be too short, it is easy to be separated from the spring when it is fully extended. If the sliding vane is designed to be too long, it is easy to interfere with the edge of the cylinder when it is fully retracted. In the prior art, a way of hinging or swing connecting the sliding vane and the roller has been proposed to solve the sliding vane stroke problem, but this way has high processing technology requirements and high manufacturing cost, and when the sliding vane needs a long stroke, the rotation of the roller is limited, which is easy to cause abnormal wear between the partition plate and the end face of the roller. SUMMARY

[0004] In view of this, the present application provides a pump body assembly and a rotary compressor to solve the problems of high processing technology requirements and high cost of the prior art of hinging or swing connecting the sliding vane and the roller, and the rotation of the roller being limited when the sliding vane needs a long stroke, and abnormal wear between the partition plate and the end face of the roller.

[0005] The present application provides a pump body assembly for a rotary compressor; the pump body assembly comprises:

[0006] a cylinder having a compression chamber and a sliding slot; the compression chamber is provided with a rotatable roller; the head of the sliding slot is communicated with the compression chamber, and the tail of the sliding slot is provided with a gas storage chamber communicated with the sliding slot; the sliding slot is provided with a slidable sliding vane;

[0007] a flange arranged at one axial end of the cylinder; the side of the flange away from the cylinder is provided with an exhaust chamber;

[0008] the flange and the cylinder jointly form a first flow path and a second flow path; the first flow path communicates the compression chamber and the exhaust chamber, and is used for exhausting the compressed gas to the exhaust chamber; the second flow path communicates the exhaust chamber and the gas storage chamber, and is used for conveying part of the gas in the exhaust chamber to the gas storage chamber;

[0009] The gas in the gas storage cavity acts on the tail of the sliding vane, so that the head of the sliding vane and the roller abut.

[0010] Further optionally, the flange comprises a first flange end face away from the gas cylinder and a second flange end face close to the gas cylinder, and the flange forms a flange passage between the first flange end face and the second flange end face;

[0011] The gas cylinder comprises a cylinder end face close to the flange, and the gas cylinder forms a cylinder passage between the cylinder end face and the gas storage cavity;

[0012] The flange passage and the cylinder passage communicate to form the second flow path.

[0013] Further optionally, the gas cylinder forms a plurality of cylinder passages with different extension directions, and the plurality of cylinder passages communicate to form the cylinder passage, and the cylinder passage is close to the sliding groove.

[0014] Further optionally, the plurality of cylinder passages comprise a first cylinder passage, a second cylinder passage and a third cylinder passage connected in sequence, and the first cylinder passage, the second cylinder passage and the third cylinder passage are all linear structures.

[0015] Further optionally, the extension direction of the flange passage is parallel to the axial direction of the flange.

[0016] The extension direction of the first cylinder passage is collinear with the extension direction of the flange passage, the extension direction of the second cylinder passage is parallel to the radial direction of the gas cylinder, and the extension direction of the third cylinder passage is parallel to the tangential direction of the gas cylinder.

[0017] Further optionally, the inner diameter of the flange passage is a, the inner diameter of the first cylinder passage is b, the inner diameter of the second cylinder passage is c, and the inner diameter of the third cylinder passage is d, and the a, b, c and d satisfy: a≥2mm, b≥2mm, c≥2mm, d≥2mm.

[0018] Further optionally, the gas cylinder comprises a cylinder body, and the cylinder body surrounds the compression cavity; a part of the side wall of the cylinder body protrudes outward along the radial direction of the cylinder body to form a flange, and the side wall corresponding to the cylinder body and the flange jointly form the sliding groove.

[0019] The flange is circular arc-shaped and coaxially arranged with the cylinder body; an axial end surface of the flange is formed with an axial end surface opening, the first cylinder passage is formed by extending from the axial end surface opening to the inside of the flange; a radial outer side wall of the flange is formed with a radial side wall opening, the second cylinder passage is formed by extending from the radial side wall opening to the first cylinder passage; one end of the second cylinder passage away from the radial side wall opening and one end of the first cylinder passage away from the axial end surface opening are communicated; a circumferential side wall of the flange is formed with a circumferential side wall opening, the third cylinder passage is formed by extending from the circumferential side wall opening to the gas storage cavity; the third cylinder passage and the second cylinder passage are cross-arranged and communicated at the intersection.

[0020] The radial side wall opening and the circumferential side wall opening are both sealed by sealing members.

[0021] Further optionally, the flange is formed with a flange exhaust hole, the cylinder is formed with a cylinder exhaust hole, the flange exhaust hole and the cylinder exhaust hole are communicated to form the first flow path;

[0022] The flange passage is close to the flange exhaust hole, and the cylinder passage is close to the cylinder exhaust hole.

[0023] Further optionally, the tail portion of the sliding sheet is formed with a groove recessed towards the head portion of the sliding sheet, the groove is open at one end close to the tail portion of the sliding groove and is closed at one end away from the tail portion of the sliding groove; in the thickness direction of the sliding sheet, the groove penetrates through the sliding sheet.

[0024] Further optionally, the cylinder is an upper cylinder, and the flange is an upper flange; the compression cavity formed by the upper cylinder is an upper compression cavity, and the sliding groove formed by the upper cylinder is an upper sliding groove; the roller arranged in the upper compression cavity is an upper roller, and the sliding sheet arranged in the upper sliding groove is an upper sliding sheet.

[0025] The pump body assembly further comprises a partition plate, a lower cylinder and a lower flange; the upper flange, the upper cylinder, the partition plate, the lower cylinder and the lower flange are sequentially arranged from top to bottom; the upper flange, the tail portion of the upper sliding groove and the partition plate jointly enclose the gas storage cavity;

[0026] One side of the upper sliding groove close to the upper flange is formed with an upper opening, and one side of the upper sliding groove close to the partition plate is formed with a lower opening; a part of the end surface of the upper flange close to the upper cylinder closes the upper opening, and a part of the end surface of the partition plate close to the upper cylinder closes the lower opening.

[0027] Further optionally, the lower cylinder has a lower compression cavity and a lower sliding groove communicated with the lower compression cavity; a lower roller rotatable is arranged in the lower compression cavity, and a lower sliding sheet slidable is arranged in the lower sliding groove.

[0028] The head of the lower sliding sheet abuts against the lower roller, and the tail of the lower sliding sheet and the tail of the lower sliding groove are both away from the lower roller.

[0029] The head of the lower sliding sheet abuts against the lower roller, and the tail of the lower sliding sheet and the tail of the lower sliding groove are both away from the lower roller.

[0030] The application also provides a rotor compressor comprising a shell and the pump body assembly.

[0031] Compared with the prior art, the application has the following beneficial effects:

[0032] (1) Provide stable sliding sheet driving force to ensure reliable operation and high compression efficiency: by setting the second flow path connecting the exhaust cavity and the gas storage cavity, the compressed high-pressure gas is introduced into the gas storage cavity; the high-pressure gas continuously acts on the tail of the sliding sheet, providing stable and sufficient driving force for the head of the sliding sheet to abut against the roller; this effectively prevents the compression cavity from being sealed due to the separation of the sliding sheet and the roller during variable working conditions or high-speed operation, improving the compression efficiency and operation reliability of the pump body assembly;

[0033] (2) Optimize structural space adaptability to realize miniaturization and flattening of the pump body assembly: using high-pressure gas driving instead of traditional mechanical spring structure, the problem of insufficient sliding groove axial space caused by the reduction of the outer diameter of the cylinder and the flattening of the structure is fundamentally solved; this design allows the sliding sheet to be designed shorter, avoiding the risk of interference between the sliding sheet and the edge of the cylinder when fully retracted, providing key technical support for the development of more compact and efficient rotor compressors;

[0034] (3) Reduce wear and energy consumption, and improve compressor life and performance: compared with the existing hinged or swing connection method, the sliding sheet and the roller remain in abutment in this scheme, without limiting the rotation of the roller, thereby significantly reducing the abnormal wear between the roller end face and the partition plate caused thereby; at the same time, the stable abutment state enhances the sealing of the compression chamber, effectively reducing the gas leakage from the high-pressure chamber to the low-pressure chamber, reducing the leakage loss, thereby improving the volumetric efficiency and energy efficiency of the compressor;

[0035] (4) Simplify the structure and reduce the manufacturing cost: the special spring and its installation structure are omitted, simplifying the machining and assembly process of the cylinder and the sliding sheet, and reducing the risk of failure and maintenance cost caused by spring fatigue and failure; the entire driving system utilizes the gas pressure generated by the compressor itself, without the need for additional complex motion mechanisms, and the structure is simple, the requirements for machining precision and process are relatively lower, which is conducive to controlling the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0037] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and are not used to limit the limiting conditions that the present application can be implemented, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that the present application can produce, should still fall within the scope of the technical content disclosed by the present application.

[0038] Figure 1 The embodiment cross-sectional structure schematic diagram of the flange and the cylinder provided by the present application when assembled together (including the first flow path and the second flow path);

[0039] Figure 2 The embodiment cross-sectional structure schematic diagram of the flange, the cylinder and the partition plate provided by the present application when assembled together (including the sliding groove and the sliding piece);

[0040] Figure 3a And Figure 3b The embodiment structure schematic diagram of the cylinder provided by the present application;

[0041] Figure 3c The embodiment structure schematic diagram of the flange (including the sliding groove and the cylinder passage) provided by the present application;

[0042] Figure 4 The embodiment structure schematic diagram of the flange provided by the present application;

[0043] Figure 5a And Figure 5b The embodiment structure schematic diagram of the sliding piece provided by the present application;

[0044] Figure 6 The embodiment structure schematic diagram of the partition plate provided by the present application;

[0045] Figure 7 The embodiment structure schematic diagram of the rotor compressor provided by the present application;

[0046] 1 - cylinder; 11 - cylinder body; 111 - compression chamber; 112 - cylinder exhaust port; 12 - flange; 121 - first cylinder passage; 122 - second cylinder passage; 1221 - radial inner passage segment; 123 - third cylinder passage; 1231 - circumferential inner passage segment; 1241 - first circumferential side wall; 1242 - second circumferential side wall; 125 - radial side wall; 1261 - first axial end face; 1262 - second axial end face; 127 - axial end face opening; 128 - radial side wall opening; 129 - circumferential side wall opening; 13 - sliding slot;

[0047] 21 - flange; 211 - first flange end face; 212 - second flange end face; 213 - flange passage; 214 - flange exhaust port; 22 - exhaust chamber;

[0048] 31 - sliding vane; 311 - groove; 32 - gas storage chamber; 33 - screw;

[0049] 41 - housing; 411 - mounting cavity; 42 - motor; 43 - upper cover; 44 - lower cover; 45 - base; 46 - gas-liquid separator; 47 - air suction pipe; 48 - exhaust pipe;

[0050] 51 - upper flange; 52 - lower flange; 53 - crankshaft; 531 - long shaft; 532 - eccentric shaft; 533 - short shaft; 54 - partition plate; 541 - protrusion; 542 - partition plate hole. DETAILED DESCRIPTION

[0051] The embodiments of the present application will be described in detail with specific examples, and other advantages and effects of the present application will be easily understood by those skilled in the art from the disclosure. It is obvious that the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0052] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Plural" generally includes at least two, but does not exclude the case of including at least one.

[0053] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0054] It is also important to note that the terms "comprising", "including", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a product or process that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such product or process. Without further limitation, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the product or process comprising the stated element.

[0055] The rotor compressor is widely used due to its simple structure and low cost. In order to improve energy efficiency and reduce cost, the cylinder design is increasingly flattened and the outer diameter is reduced, but this leads to a serious limitation of the sliding groove space, making it difficult for the traditional "sliding vane-spring" driving structure to be implemented: the sliding vane is too short to be separated from the spring, and too long to interfere with the cylinder. The existing scheme of hinging or swinging connection of the sliding vane and the roller can alleviate the stroke problem, but has problems such as complex processing technology, high cost, limiting the rotation of the roller, and aggravating the end face wear;

[0056] The present application creatively provides a pump body assembly for a rotor compressor; the pump body assembly comprises a cylinder and a flange, the cylinder has a compression chamber provided with a roller and a sliding groove provided with a sliding vane; the tail of the sliding groove is provided with a gas storage chamber communicated with the sliding groove; the flange is arranged at one axial end of the cylinder, and the side of the flange away from the cylinder is provided with an exhaust chamber; the flange and the cylinder jointly form a first flow path and a second flow path, the first flow path communicates the compression chamber and the exhaust chamber, and is used for discharging the compressed gas to the exhaust chamber; the second flow path communicates the exhaust chamber and the gas storage chamber, and is used for conveying part of the gas in the exhaust chamber to the gas storage chamber; the gas in the gas storage chamber acts on the tail of the sliding vane, so that the head of the sliding vane and the roller are kept in abutment; the compression efficiency and the operation reliability of the pump body assembly are improved, the rotation of the roller is not limited, the abnormal wear between the roller end face and the partition plate is significantly reduced; the gas leakage from the high-pressure chamber to the low-pressure chamber is effectively reduced, the leakage loss is reduced, and a special spring is saved.

[0057] < Pump body assembly >

[0058] As shown in Figures 1 to 6 The present application provides a pump body assembly for a rotor compressor; it can be used for a single-cylinder rotor compressor and a double-cylinder rotor compressor; preferably, it is used for a double-cylinder rotor compressor; the pump body assembly comprises:

[0059] The cylinder 1 has a compression chamber 111 and a sliding groove 13; the compression chamber 111 is provided with a rotatable roller, the head of the sliding groove 13 is communicated with the compression chamber 111, and the tail of the sliding groove 13 is provided with a gas storage chamber 32 communicated with the sliding groove 13; the sliding groove 13 is provided with a slidable sliding vane 31;

[0060] A flange 21 is arranged at one axial end of the cylinder 1, and an exhaust cavity 22 is arranged at a side of the flange 21 away from the cylinder 1.

[0061] The flange 21 and the cylinder 1 jointly form a first flow path and a second flow path, the first flow path connecting the compression cavity 111 and the exhaust cavity 22 and used for discharging the compressed gas to the exhaust cavity 22, and the second flow path connecting the exhaust cavity 22 and the gas storage cavity 32 and used for conveying part of the gas in the exhaust cavity 22 to the gas storage cavity 32.

[0062] The gas in the gas storage cavity 32 acts on the tail of the sliding vane 31, so that the head of the sliding vane 31 abuts against the roller; that is, part of the compressed gas entering the exhaust cavity 22 through the first flow path enters the gas storage cavity 32 through the second flow path, and the part of the gas acts on the tail of the sliding vane 31, so that the head of the sliding vane 31 always abuts against the roller, avoiding the disengagement of the sliding vane 31 and the roller, significantly reducing the noise during the operation of the compressor, and improving the reliability of the operation of the compressor; the use of high-pressure gas driving instead of the traditional mechanical spring structure simplifies the machining and assembly process of the cylinder 1 and the sliding vane 31, and reduces the cost; the design allows the sliding vane 31 to be designed to be shorter, and provides key technical support for the development of the rotor compressor to a more compact and more efficient design direction; the self-rotation movement of the roller is not limited, which significantly reduces the abnormal wear between the end face of the roller and the partition plate 54; and the sealing performance of the compression cavity 111 is enhanced, effectively reducing the gas leakage from the high-pressure cavity to the low-pressure cavity.

[0063] Specifically, the inside of the cylinder 1 forms a compression cavity 111, and the compression cavity 111 is a cylindrical cavity; a sliding groove 13 is formed in the side wall of the cylinder 1, and the extension direction of the sliding groove 13 is parallel or collinear to the radial direction of the cylinder 1; the sliding vane 31 and the roller abut against each other and separate the compression cavity 111 into a high-pressure cavity and a low-pressure cavity; the cylinder 1 further forms a cylinder gas suction hole and a cylinder gas discharge hole 112, the cylinder gas suction hole is communicated with the low-pressure cavity, and the cylinder gas discharge hole 112 is communicated with the high-pressure cavity; with the rotation of the roller, the low-pressure cavity sucks in gas through the cylinder gas suction hole, and the high-pressure cavity discharges gas through the cylinder gas discharge hole 112, realizing the functions of gas suction and discharge;

[0064] The tail of the sliding vane 31 forms a groove 311 recessed toward the head of the sliding vane 31, the groove 311 is open at one end close to the tail of the sliding groove 13, and the other end of the groove 311 away from the tail of the sliding groove 13 is closed; in the thickness direction of the sliding vane 31, the groove 311 penetrates through the sliding vane 31; the groove 311 increases the acting area of the gas and the sliding vane 31, so that the sliding vane 31 is subjected to the force of the gas at different positions in the length direction of the sliding vane 31, thereby more stably sliding in the sliding groove 13, and the head of the sliding vane 31 abuts against the roller; the groove 311 is rectangular or semicircular.

[0065] The flange 21 includes a first flange end surface 211 away from the cylinder 1 and a second flange end surface 212 close to the cylinder 1, and the flange 21 is formed with a flange passage 213 between the first flange end surface 211 and the second flange end surface 212;

[0066] The cylinder 1 includes a cylinder end surface close to the flange 21, and the cylinder 1 is formed with a cylinder passage between the cylinder end surface and the gas storage cavity 32;

[0067] The flange passage 213 and the cylinder passage communicate to form a second flow path; that is, part of the gas in the exhaust cavity 22 enters the cylinder passage through the flange passage 213, and then enters the gas storage cavity 32.

[0068] Further, the cylinder passage is formed with a plurality of cylinder channels with different extension directions, and the plurality of cylinder channels communicate to form the cylinder passage; the gas channel can flow through the gas, and the structure is simple and the processing cost is low;

[0069] The cylinder passage is close to the chute 13, which shortens the length of the cylinder passage, reduces the gas flow resistance, and enables the gas to quickly enter the gas storage cavity 32;

[0070] Further, the plurality of cylinder channels include a first cylinder channel 121, a second cylinder channel 122 and a third cylinder channel 123 which are sequentially communicated, and the first cylinder channel 121, the second cylinder channel 122 and the third cylinder channel 123 are all linear structures; the first cylinder channel 121, the second cylinder channel 122 and the third cylinder channel 123 are perpendicular to each other.

[0071] Preferably, the extension direction of the flange passage 213 is parallel to the axial direction of the flange 21; the extension direction of the first cylinder channel 121 is collinear with the extension direction of the flange passage 213, the extension direction of the second cylinder channel 122 is parallel to the radial direction of the cylinder 1, the extension direction of the third cylinder channel 123 is parallel to the tangential direction of the cylinder 1, and the extension direction of the first cylinder channel 121, the extension direction of the second cylinder channel 122 and the extension direction of the third cylinder channel 123 are perpendicular to each other.

[0072] Further, the size of the flange passage 213 and the cylinder passage is described as follows: the inner diameter of the flange passage 213 is a, the inner diameter of the first cylinder channel 121 is b, the inner diameter of the second cylinder channel 122 is c, and the inner diameter of the third cylinder channel 123 is d, and a, b, c and d satisfy: a≥2mm, b≥2mm, c≥2mm, d≥2mm; the slide 31 and the roller are abutted, the influence on the rotation of the roller is reduced, and abnormal noise caused by the disengagement of the slide 31 and the roller is avoided.

[0073] The specific structure of the cylinder 1 will be described below. The cylinder 1 comprises a cylinder body 11, which is provided with a compression chamber 111. A portion of the side wall of the cylinder body 11 protrudes outward in the radial direction of the cylinder body 11 to form a flange 12. The side wall of the cylinder body 11 corresponding to the flange 12 and the flange 12 jointly form the sliding groove 13.

[0074] The flange 12 is in the shape of a circular arc and coaxially arranged with the cylinder body 11. An axial end surface of the flange 12 is provided with an axial end surface opening 127. The first cylinder passage 121 is formed by extending from the axial end surface opening 127 to the inside of the flange 12. A radial outer side wall 125 of the flange 12 is provided with a radial side wall opening 128. The second cylinder passage 122 is formed by extending from the radial side wall opening 128 to the first cylinder passage 121. One end of the second cylinder passage 122 away from the radial side wall opening 128 is in communication with one end of the first cylinder passage 121 away from the axial end surface opening 127. A circumferential side wall of the flange 12 is provided with a circumferential side wall opening 129. The third cylinder passage 123 is formed by extending from the circumferential side wall opening 129 to the gas storage chamber 32. The third cylinder passage 123 and the second cylinder passage 122 are arranged in a cross manner and are in communication at the intersection. The gas passage can flow through the gas, and the structure is simple and the processing cost is low.

[0075] The radial side wall opening 128 and the circumferential side wall opening 129 are both sealed by sealing members to avoid gas leakage through the radial side wall opening 128 and the circumferential side wall opening 129.

[0076] Specifically, the flange 12 comprises a first circumferential side wall 1241, a second circumferential side wall 1242, a radial outer side wall 125, a first axial end surface 1261, and a second axial end surface 1262. The first circumferential side wall 1241 and the second circumferential side wall 1242 are arranged opposite to each other in the circumferential direction of the flange 12. The radial outer side wall 125 is located on the radial outer side of the flange 12. The first axial end surface 1261 and the second axial end surface 1262 are arranged opposite to each other in the axial direction of the flange 12. The first axial end surface 1261 is provided with the axial end surface opening 127. The radial outer side wall 125 is provided with the radial side wall opening 128. The first circumferential side wall 1241 is provided with the circumferential side wall opening 129.

[0077] The inner part of the flange 12 is formed with a first cylinder passage 121, a second cylinder passage 122 and a third cylinder passage 123; the upper end of the first cylinder passage 121 extends to an axial end face opening 127, and the first cylinder passage 121 communicates with the flange passage 213 through the axial end face opening 127; one end of the second cylinder passage 122 extends to a radial side wall opening 128, and the other end extends to the lower end of the first cylinder passage 121, and the second cylinder passage 122 communicates with the other end away from the radial side wall opening 128 and the lower end of the first cylinder passage 121; one end of the third cylinder passage 123 extends to a circumferential side wall opening 129, and the other end extends to the gas storage cavity 32; the second cylinder passage 122 includes a radial inner passage section 1221 close to the first cylinder passage 121, and the third cylinder passage 123 includes a circumferential inner passage section 1231 close to the gas storage cavity 32; the first cylinder passage 121, the radial inner passage section 1221 and the circumferential inner passage section 1231 communicate in sequence to form a cylinder passage, that is, part of the gas in the exhaust cavity 22 flows through the flange passage 213, the first cylinder passage 121, the radial inner passage section 1221 and the circumferential inner passage section 1231 in sequence, and enters the gas storage cavity 32;

[0078] The sealing member is a screw 33, which is locked and sealed by the screw 33.

[0079] Next, the formation of the first flow path is described. The flange 21 is formed with a flange exhaust hole 214, and the cylinder 1 is formed with a cylinder exhaust hole 112. The flange exhaust hole 214 and the cylinder exhaust hole 112 communicate to form the first flow path.

[0080] The flange passage 213 is close to the flange exhaust hole 214, and the cylinder passage is close to the cylinder exhaust hole 112. After the high-pressure gas in the compression cavity 111 is discharged to the exhaust cavity 22, part of the gas enters the flange passage 213 through a shorter path, and then enters the gas storage cavity 32 through the cylinder passage. The pressure loss of the gas is small, and the effective force acting on the tail of the vane 31 is large, so that there is a pressure difference between the head and the tail of the vane 31, and the cylinder 1 realizes gas suction and exhaust. The pressure of this part of the gas is reduced, so the pressure difference acting on the vane 31 is larger than that of a conventional compressor, so that the vane 31 is always in contact with the roller, reducing the leakage between the vane 31 and the roller, effectively improving the efficiency of the pump body assembly. At the same time, it reduces the problem of limited self-rotation of the roller caused by the hinged or swing connection of the vane 31 and the roller, and reduces the wear of the end face of the partition plate 54 and the roller. The spring in the prior art is cancelled, the structure of the vane 31 is simplified, the machining process is optimized, and the machining cost is reduced.

[0081] Preferably, the pump body assembly is a double-cylinder pump body assembly; the above-mentioned cylinder 1 is an upper cylinder, and the above-mentioned flange 21 is an upper flange 51; the compression cavity 111 formed by the above-mentioned upper cylinder is an upper compression cavity, and the sliding groove 13 formed by the upper cylinder is an upper sliding groove; the roller arranged in the upper compression cavity is an upper roller, and the vane 31 arranged in the upper sliding groove is an upper vane.

[0082] The pump body assembly further comprises a partition plate 54, a lower cylinder and a lower flange 52; the upper flange 51, the upper slide groove, the tail of the upper slide groove and the partition plate 54 are sequentially arranged from top to bottom; the upper flange 51, the tail of the upper slide groove and the partition plate 54 jointly enclose the gas storage cavity 32;

[0083] The upper slide groove is formed with an upper opening on one side close to the upper flange 51, and is formed with a lower opening on one side close to the partition plate 54; a part of the end face of the upper flange 51 close to the upper cylinder closes the upper opening, that is, the end face of the upper flange 51 close to the upper cylinder has no step, effectively sealing the upper opening; a part of the end face of the partition plate 54 close to the upper cylinder closes the lower opening, that is, the partition plate 54 is formed with a protruding portion 541 at the corresponding position of the flange 12 of the upper cylinder, and the protruding portion 541 effectively seals the lower opening.

[0084] The driving mode of the sliding vane 31 in the upper cylinder is different from the driving mode of the sliding vane 31 in the lower cylinder; the driving mode of the sliding vane 31 in the lower cylinder will be described below; the lower cylinder has a lower compression cavity and a lower slide groove in communication with the lower compression cavity; the lower compression cavity is provided with a rotatable lower roller, and the lower slide groove is provided with a slidable lower sliding vane;

[0085] The head of the lower sliding vane abuts against the lower roller, and the tail of the lower sliding vane and the tail of the lower slide groove are provided with an elastic member, so that the head of the lower sliding vane abuts against the lower roller under the action of the elastic member; or, the head of the lower sliding vane and the lower roller are hinged or swing-connected, and the lower roller rotates while the lower sliding vane slides in the lower slide groove.

[0086] In summary, under the action of high-pressure gas, the sliding vane 31 always abuts against the roller, avoiding the separation of the sliding vane 31 and the roller, and improving the efficiency of the pump body; the self-rotation of the roller is not limited, significantly reducing the abnormal wear between the end face of the roller and the partition plate 54; the special spring is omitted, the machining and assembly process of the cylinder 1 and the sliding vane 31 are simplified, the cost is reduced, and the development of the pump body assembly towards miniaturization and flattening is facilitated.

[0087] <rotary compressor>

[0088] As shown in Figure 7 The embodiment provides a rotary compressor, which comprises a shell 41 and the pump body assembly described in any one of the above embodiments; the shell 41 is formed with a mounting cavity 411, the pump body assembly is arranged in the mounting cavity 411, and the pump body assembly further comprises a crankshaft 53; the part of the mounting cavity 411 above the upper flange 51 is the exhaust cavity 22;

[0089] The upper flange 51 is formed with an upper flange hole, and the lower flange 52 is formed with a lower flange hole; the crankshaft 53 comprises a long shaft 531, an upper eccentric shaft 532, an intermediate shaft, a lower eccentric shaft 532 and a short shaft 533 arranged in sequence from top to bottom, the long shaft 531 is rotatably connected with the upper flange hole, the upper eccentric shaft 532 is drivingly connected with the upper roller, the intermediate shaft is rotatably arranged in a partition plate hole 542 formed in the partition plate 54, the lower eccentric shaft 532 is drivingly connected with the lower roller, and the short shaft 533 is rotatably connected with the lower flange hole;

[0090] When the crankshaft 53 is controlled to rotate, the upper eccentric shaft 532 can rotate with the upper roller, and under the action of high-pressure gas, the upper slide and the upper roller are always in abutment; the lower eccentric shaft 532 can rotate with the lower roller, and under the action of the elastic member or the lower roller, the lower slide and the lower roller are in abutment.

[0091] Further, the rotary compressor further comprises a motor 42, which is arranged in the mounting cavity 411 and above the pump body assembly; the motor 42 comprises a rotor and a stator, and the rotor is drivingly connected with the long shaft 531;

[0092] The stator comprises a stator core and a stator winding, the stator core is arranged on the side wall of the mounting cavity 411, and the stator winding is wound on the stator core; the rotor is rotatably arranged in the mounting cavity 411 and comprises a rotor core; the stator winding is connected with alternating current, so that the rotor rotates.

[0093] The rotary compressor further comprises an upper cover 43 and a lower cover 44, the upper cover 43 is arranged at the axial upper end of the shell 41, the lower cover 44 is arranged at the axial lower end of the shell 41, and the upper cover 43, the shell 41 and the lower cover 44 jointly enclose the sealed mounting cavity 411; the lower end of the shell 41 is provided with a base 45, and the rotary compressor is fixedly arranged through the base 45; the upper cover 43 is provided with an exhaust pipe 48, and the exhaust pipe 48 is in communication with the exhaust cavity 22;

[0094] One side of the rotary compressor is provided with a gas-liquid separator 46, which is formed with a gas-liquid separator outlet; the upper cylinder and the lower cylinder are both formed with a cylinder suction hole and a cylinder exhaust hole 112, the cylinder suction hole is in communication with the gas-liquid separator outlet through a suction pipe 47, and the cylinder exhaust hole 112 is in communication with the exhaust cavity 22;

[0095] When the upper cylinder and the lower cylinder are suctioned, the gas in the gas-liquid separator 46 enters the upper cylinder and the lower cylinder through the suction pipe 47; the gas in the upper compression chamber and the lower compression chamber is discharged to the exhaust cavity 22, and then discharged through the exhaust pipe 48.

[0096] The above specifically illustrates and describes the exemplary embodiments of the present disclosure. It should be understood that the present disclosure is not limited to the detailed structure, arrangement or implementation method described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent arrangements within the spirit and scope of the appended claims.

Claims

1. A pump body assembly for a rotary compressor; characterized in that, The pump assembly includes: A cylinder (1) has a compression chamber (111) and a slide groove (13); a rotatable roller is provided in the compression chamber (111); the head of the slide groove (13) is connected to the compression chamber (111); the tail of the slide groove (13) is provided with an air storage chamber (32) connected to the slide groove (13); a slidable slide plate (31) is provided in the slide groove (13); A flange (21) is provided at one axial end of the cylinder (1); an exhaust chamber (22) is provided on the side of the flange (21) away from the cylinder (1); The flange (21) and the cylinder (1) together form a first flow path and a second flow path. The first flow path connects the compression chamber (111) and the exhaust chamber (22) and is used to discharge the compressed gas to the exhaust chamber (22). The second flow path connects the exhaust chamber (22) and the gas storage chamber (32) and is used to transport part of the gas in the exhaust chamber (22) to the gas storage chamber (32). The gas in the gas storage chamber (32) acts on the tail of the slide (31), causing the head of the slide (31) to come into contact with the roller.

2. The pump body assembly according to claim 1, characterized in that, The flange (21) includes a first flange end face (211) away from the cylinder (1) and a second flange end face (212) close to the cylinder (1), and the flange (21) forms a flange passage (213) between the first flange end face (211) and the second flange end face (212); The cylinder (1) includes a cylinder end face near the flange (21), and the cylinder (1) forms a cylinder passage between the cylinder end face and the air storage chamber (32); The flange passage (213) and the cylinder passage are connected to form the second flow path.

3. The pump body assembly according to claim 2, characterized in that, The cylinder (1) has multiple cylinder channels with different extension directions. The multiple cylinder channels are connected to form the cylinder passage, which is close to the slide groove (13).

4. The pump body assembly according to claim 3, characterized in that, The plurality of cylinder passages include a first cylinder passage (121), a second cylinder passage (122), and a third cylinder passage (123) connected in sequence, wherein the first cylinder passage (121), the second cylinder passage (122), and the third cylinder passage (123) are all linear structures.

5. The pump body assembly according to claim 4, characterized in that, The flange passage (213) extends in a direction parallel to the axial direction of the flange (21); The extension direction of the first cylinder passage (121) is collinear with the extension direction of the flange passage (213), the extension direction of the second cylinder passage (122) is parallel to the radial direction of the cylinder (1), and the extension direction of the third cylinder passage (123) is parallel to the tangential direction of the cylinder (1).

6. The pump body assembly according to claim 4, characterized in that, The inner diameter of the flange passage (213) is a, the inner diameter of the first cylinder passage (121) is b, the inner diameter of the second cylinder passage (122) is c, and the inner diameter of the third cylinder passage (123) is d. a, b, c and d satisfy: a≥2mm, b≥2mm, c≥2mm, d≥2mm.

7. The pump body assembly according to claim 4, characterized in that, The cylinder (1) includes a cylinder body (11) which surrounds the compression chamber (111); a portion of the side wall of the cylinder body (11) protrudes outward along the radial direction of the cylinder body (11) to form a flange (12), and the side wall of the cylinder body (11) and the flange (12) together form the groove (13); The flange (12) is arc-shaped and coaxially arranged with the cylinder body (11); the upper axial end face of the flange (12) forms an axial end face opening (127), which extends into the flange (12) to form the first cylinder passage (121); the outer radial side wall (125) of the flange (12) forms a radial side wall opening (128), which extends into the first cylinder passage (121) to form the second cylinder passage (12). 2); The end of the second cylinder passage (122) away from the radial sidewall opening (128) and the end of the first cylinder passage (121) away from the axial end face opening (127) are connected; a circumferential sidewall of the flange (12) is formed with a circumferential sidewall opening (129), and the third cylinder passage (123) is formed by extending from the circumferential sidewall opening (129) to the air storage cavity (32); the third cylinder passage (123) and the second cylinder passage (122) are intersected and connected at the intersection; Both the radial sidewall opening (128) and the circumferential sidewall opening (129) are sealed by a seal.

8. The pump body assembly according to claim 2, characterized in that, The flange (21) has a flange vent hole (214), and the cylinder (1) has a cylinder vent hole (112). The flange vent hole (214) and the cylinder vent hole (112) are connected to form the first flow path. The flange passage (213) is close to the flange vent (214), and the cylinder passage is close to the cylinder vent (112).

9. The pump body assembly according to claim 1, characterized in that, The tail of the slide (31) is formed with a groove (311) that is recessed toward the head of the slide (31). The end of the groove (311) near the tail of the slide groove (13) is open, and the end of the groove (311) away from the tail of the slide groove (13) is closed. In the thickness direction of the slide (31), the groove (311) penetrates the slide (31).

10. The pump body assembly according to any one of claims 1 to 8, characterized in that, The cylinder (1) is an upper cylinder, and the flange (21) is an upper flange (51); the compression chamber (111) formed by the upper cylinder is an upper compression chamber, and the slide groove (13) formed by the upper cylinder is an upper slide groove; the rollers provided in the upper compression chamber are upper rollers, and the slide plates (31) provided in the upper slide groove are upper slide plates; The pump body assembly also includes a partition (54), a lower cylinder and a lower flange (52); the upper flange (51), upper cylinder, partition (54), lower cylinder and lower flange (52) are arranged in order from top to bottom; the upper flange (51), the tail of the upper slide groove and the partition (54) together form the air storage chamber (32); The upper slide groove has an upper opening on the side near the upper flange (51), and a lower opening on the side near the partition (54); a portion of the end face of the upper flange (51) near the upper cylinder closes the upper opening, and a portion of the end face of the partition (54) near the upper cylinder closes the lower opening.

11. The pump body assembly according to claim 10, characterized in that, The lower cylinder has a lower compression chamber and a lower sliding groove communicating with the lower compression chamber; a rotatable lower roller is provided in the lower compression chamber, and a slidable lower sliding plate is provided in the lower sliding groove; The head of the sliding plate abuts against the lower roller, and an elastic element is provided between the tail of the sliding plate and the tail of the sliding groove; or, the head of the sliding plate and the lower roller are hinged or oscillatingly connected.

12. A rotary compressor, characterized in that, It includes a housing (41) and a pump body assembly as described in any one of claims 1 to 11; the housing (41) is formed with a mounting cavity (411) and the pump body assembly is disposed within the mounting cavity (411).

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