Rotor type compressor pump body and manufacturing method

Abstract

The invention relates to a rotor type compressor pump body and a manufacturing method, the rotor type compressor pump body comprises a cylinder body, the cylinder body is internally provided with a compression cavity, and the inner peripheral wall is radially provided with a sliding vane seat for accommodating a sliding vane and an air suction seat; a crankshaft; a piston; an upper bearing cover; a lower bearing cover; and at least one of the cylinder body, the upper bearing cover and the lower bearing cover is formed by compounding an insert and a light material. The insert made of the same material in the prior art and the light material are formed through injection or die casting, and the insert is in contact with the crankshaft or the piston or the slip sheet, so that the wear resistance of the pump body is ensured, and the light weight of the pump body of the compressor is also ensured; in addition, compared with conventional casting production of iron castings and steel castings or production of other metallurgical materials, the composite part formed by combining the insert and the base body can reduce the cost and also can be beneficial to energy conservation and environmental protection. And for the insert, large-scale production and processing can be carried out.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, in particular to a rotor type compressor pump body and a manufacturing method thereof. Background Art

[0002] Rotary refrigeration compressors are widely used in air conditioners for household and similar purposes due to their high refrigeration efficiency, compact structure and small size.

[0003] The compressor pump body is an important component of the rotor refrigeration compressor, which is mainly composed of a cylinder body, a piston, a vane, a crankshaft, an upper bearing cover and a lower bearing cover. The upper bearing cover, the piston and the lower bearing cover are sequentially sleeved on the crankshaft along the axial direction of the crankshaft to form a dynamic seal with the cylinder body, dividing the interior of the cylinder body into two air chambers of high and low pressure. The tail of the vane presses the end face tightly against the outer wall of the piston, dividing the space into an intake chamber and a compression chamber. Driven by the crankshaft, the process of intake, compression and exhaust is completed.

[0004] At present, most of the components of the compressor pump body are cast iron parts or metallurgical parts, and the existing components have the disadvantages of heavy weight and large rotational inertia.

[0005] If cast iron parts or metallurgical parts are replaced with low-density materials, the weight and rotational inertia of the whole machine will be greatly reduced, thereby reducing the vibration and noise of the whole machine and improving the performance of the compressor; however, low-density materials often cannot meet the strength requirements, or the wear resistance cannot meet the use needs of the compressor.

[0006] In summary, achieving lightweight design of compressor pump body while meeting the wear resistance of compressor pump body has become an urgent problem that researchers in this field need to solve. Summary of the invention

[0007] The technical problem to be solved by the present invention is: to realize lightweight design of compressor pump body while satisfying the wear resistance of compressor pump body; In order to solve the above technical problems, the technical solution adopted by the present invention is: The present invention is a rotor compressor pump body, comprising: a cylinder body, the cylinder body has a compression chamber inside, the inner peripheral wall is radially opened with a vane seat and an air suction seat for accommodating a vane; a crankshaft, which is composed of a long axis part, an eccentric shaft and a short axis part; a piston; an upper bearing cover, which is arranged at the top of the cylinder body and has an upper shaft sleeve for the long axis part of the crankshaft to pass through; a lower bearing cover, which is arranged at the bottom of the cylinder body and has a lower shaft sleeve for the short axis part of the crankshaft to pass through; the upper bearing cover, the piston and the lower bearing cover are sequentially sleeved on the crankshaft along the axial direction of the crankshaft to form a dynamic seal with the cylinder body; at least one of the cylinder body, the upper bearing cover and the lower bearing cover is composited with an inlay and a light material.

[0008] Furthermore, when there are a plurality of cylinder bodies arranged vertically, partition plates are provided between the cylinder bodies.

[0009] Furthermore, the upper bearing cover includes the upper shaft sleeve and the upper flange plate; the inlay is an upper shaft hole inlay, and its outer dimensions are consistent with those of the upper shaft sleeve.

[0010] Furthermore, the inlay component also includes an exhaust portion inlay component.

[0011] Furthermore, the upper bearing cover is formed by integrally injecting or die-casting the exhaust part insert and the upper shaft hole insert with a lightweight material. Furthermore, the exhaust part insert has a curved surface on the side thereof that fits the outer wall of the upper shaft hole insert.

[0012] Furthermore, the lower bearing cover includes a lower shaft sleeve and a lower flange plate; the inlay is a lower shaft hole inlay, and its outer dimensions are consistent with those of the lower shaft sleeve.

[0013] Furthermore, the lower bearing cover is formed by integrally injecting or die-casting the lower shaft hole insert and the lightweight material.

[0014] Furthermore, the inlay is a slide seat inlay and / or an air suction seat inlay.

[0015] Furthermore, when the inlay in the cylinder body is a vane seat inlay, the vane seat inlay has the vane seat that moves relative to the end of the vane.

[0016] Furthermore, when the inlay in the cylinder body is a suction seat inlay with a hollow structure, the suction seat inlay has a through suction seat, and the suction seat is connected to the compression chamber in the cylinder body.

[0017] Furthermore, when the inlays in the cylinder body are vane seat inlays and suction seat inlays, the suction seat inlay has an inclined slope, and the suction seat inlay slope is fitted with the outer wall of one side of the vane seat inlay. The axis of the suction seat inlay intersects with the center line of the vane seat inlay at one point, which is the center of the cross section of the cylinder body compression chamber.

[0018] Furthermore, the cylinder body is formed by integrally injecting or die-casting the suction seat insert, the vane seat insert and a lightweight material.

[0019] Furthermore, the inlay is made of cast iron, cast steel or other metallurgical profiles.

[0020] Furthermore, the lightweight material is aluminum alloy, magnesium alloy, titanium alloy or engineering plastic.

[0021] Furthermore, an upper shaft hole annular groove is formed on the outer peripheral wall of the upper shaft hole insert, and an upper shaft hole protrusion is arranged in the upper shaft hole annular groove.

[0022] Furthermore, a lower shaft hole annular groove is formed on the outer peripheral wall of the lower shaft hole insert, and a lower shaft hole protrusion is provided in the lower shaft hole annular groove.

[0023] Furthermore, two side planes of the slide seat inlay are provided with horizontally and vertically intersecting grooves.

[0024] Furthermore, the axial outer peripheral wall of the suction seat insert is provided with a circumferential annular groove and a circumferential protrusion.

[0025] The present invention also relates to a method for manufacturing a rotor compressor pump body, characterized in that it comprises the following steps: (1) Injection or die-casting molds for making upper bearing caps, cylinder blocks or lower bearing caps; (2) Making upper shaft hole inlays, exhaust part inlays, vane seat inlays, suction seat inlays or lower shaft hole inlays; (3) placing and fixing the above-mentioned inlay in the corresponding above-mentioned mold; (4) Injecting or pressing a lightweight material as a base material into a mold, and taking it out after cooling and forming, thereby obtaining an upper bearing cover, a cylinder block or a lower bearing cover containing the above-mentioned insert; (5) The upper bearing cover, cylinder block or lower bearing cover containing the above-mentioned insert are assembled in sequence with the crankshaft and piston to form the rotor compressor pump body.

[0026] Beneficial effects of the invention: The present invention relates to a rotor compressor pump body, which is formed by injection or die-casting an inlay made of the same material as that in the prior art with a lightweight material, and the inlay is in contact with a crankshaft or a piston or a vane, which not only ensures the wear resistance of the pump body, but also ensures the lightweight of the compressor pump body; in addition, the composite part formed by combining the inlay and the base can reduce costs and is beneficial to energy conservation and environmental protection compared to the casting production of conventional cast iron parts, cast steel parts or the production of other metallurgical materials; for the vane seat, exhaust components, upper shaft hole of the upper bearing cover, lower shaft hole of the lower bearing cover, etc. in the cylinder body, the prior art can only process them one by one, while for inlays, such as the vane seat inlay, more than ten or even more than twenty pieces can be processed at a time, and large-scale production and processing can be carried out, which can not only improve production efficiency but also ensure the consistency of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 It is a structural schematic diagram of a single-cylinder compressor pump body of the present invention; Figure 2 This is a schematic diagram of the structure of the double-cylinder compressor pump body of the present invention. Figure 3 is a horizontal cross-sectional view of the upper bearing cover of the present invention; Figure 4 is a vertical cross-sectional view of the upper bearing cover of the present invention; Figure 5 It is a schematic structural diagram of the upper shaft hole insert in the upper bearing cover of the present invention; Figure 6 It is a schematic diagram of the structure of the exhaust part inlay in the upper bearing cover of the present invention; Figure 7 It is a structural schematic diagram of another exhaust part insert in the upper bearing cover of the present invention; Figure 8 It is a structural schematic diagram of an annular structure cylinder body with an air suction seat insert and a vane seat insert of the present invention; Fig. 9 , Fig.10 , Fig.11 They are respectively a right view, a front view and a left view of the slide seat inlay of the present invention; Fig.12 It is a structural schematic diagram of the suction seat inlay of the present invention; Fig.13 , Fig.14 , Fig.15 , Fig.16 It is a right side view, a front view, a vertical cross-sectional view, and a left side view of another slide seat inlay of the present invention; Fig.17 It is a structural schematic diagram of an annular structure cylinder body with an integrated inlay of a suction seat and a sliding vane seat according to the present invention; Fig.18 It is a structural schematic diagram of another annular structure cylinder body with an integrated inlay of a suction seat and a sliding vane seat according to the present invention; Fig.19 , Fig. 20 , Fig.21 It is a right view, a front view and a left view of the integrated inlay of the suction seat and the slide seat of the present invention; Fig. 22 , Fig.23 , Fig.24 , Fig.25 It is a right view, a front view, a cross-sectional view and a left view of another inlay of an air suction seat and a sliding vane seat of the present invention; Fig.26 is a horizontal cross-sectional view of the lower bearing cover of the present invention; Fig. 27 is a vertical cross-sectional view of the lower bearing cover of the present invention; Fig.28 It is a schematic structural diagram of the lower shaft hole inlay of the present invention; Fig.29 , Fig.30 They are schematic diagrams of the structure of a single-protrusion cylinder body containing the inlay of the present invention; Fig.31 , Fig.32 They are schematic diagrams of the double-protrusion cylinder structure containing the inlay of the present invention; Fig.33 It is a schematic diagram of the compressor pump body structure of the prior art. DETAILED DESCRIPTION

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0030] The compressor pump body of the prior art is as follows Fig.33 As shown, the compressor pump body includes a cylinder body 11, the eccentric shaft 22 of the crankshaft 2 is located in the cylinder body 11, the eccentric shaft 22 is outerly provided with a piston 3, the top of the cylinder body 11 is provided with an upper bearing cover 4, the upper bearing cover 4 is composed of an upper sleeve 41 and an upper flange plate 42, an exhaust portion 421 (not shown) is provided on the upper flange plate 42, and the exhaust portion 421 is connected to an external exhaust pipe, a lower bearing cover 5 is provided at the bottom of the cylinder body 11, the lower bearing cover 5 is composed of a lower sleeve 51 and a lower flange plate 52, the major axis 21 of the crankshaft 2 is partially located in the upper shaft hole portion of the upper sleeve 41, and the minor axis 23 of the crankshaft 2 is located in the lower shaft hole portion of the lower sleeve 51; the inner peripheral wall of the cylinder body 11 is provided with an intake seat 6 (not shown) for intake, and the intake seat is connected to the intake pipe; and a vane seat 7 is provided, a vane 8 is provided in the vane seat, and the end of the vane 8 is sealed with the piston 3.

[0031] The compressor pump body and its components of the present invention are described in detail below with reference to the accompanying drawings.

[0032] The compressor pump body and its components of the present invention are as follows Figure 1 As shown, for a conventional compressor pump body, the upper shaft hole portion 411 of the upper shaft sleeve 41 is in friction contact with the outer peripheral wall of the major shaft 21, the lower shaft hole portion 511 of the lower shaft sleeve 51 is in friction contact with the outer peripheral wall of the minor shaft 23, the slide vane 8 is in friction contact with the slide vane seat 7, and the suction seat 6 needs to be externally connected to an intake pipe, and the exhaust portion 421 needs to be externally connected to an exhaust pipe.

[0033] In order to ensure the wear resistance of the upper shaft hole portion 411 or the lower shaft hole portion 511 or the vane seat 7, or to ensure the wear resistance and coaxial connection between the intake pipe and the suction seat 6, or to ensure the wear resistance and coaxial connection between the exhaust pipe and the exhaust portion 421, the upper shaft hole portion 411 and the exhaust portion 421 of the upper bearing cover 4, the lower shaft hole portion 511 of the lower bearing cover 5, the vane seat 7 and the suction seat 6 of the cylinder body 11 can be set as inlays different from the base material; the inlays are made of cast iron, cast steel or other metallurgical materials, and the inlays here can meet the requirements of wear resistance or coaxiality.

[0034] Figure 1It is a cross-sectional view of the pump body, the cylinder body 11 includes a cylinder body base 1-11, an intake seat insert (not shown) and a vane seat insert (not shown) are arranged in the cylinder body base 1-11, and the eccentric shaft 22 of the crankshaft 2 is arranged in the cylinder body 11; an upper bearing cover 4 is provided on the top of the cylinder body 11, and the upper bearing cover 4 includes an upper shaft hole insert 2-41, an upper flange plate base 1-42, and an exhaust part insert (not shown), and friction occurs between the major axis 21 of the crankshaft 2 and the inner wall of the upper shaft hole insert 2-41; a lower bearing cover 5 is provided at the bottom of the cylinder body 11, and the lower bearing cover 5 includes a lower shaft hole insert 2-51 and a lower flange plate base 1-52, and friction occurs between the minor axis 23 of the crankshaft 2 and the inner wall of the lower shaft hole insert 2-51.

[0035] Figure 3 It is a horizontal cross-sectional view of the upper flange plate base 1-42 of the upper bearing cover 4, showing the positions of the exhaust section inlay 2-43 and the upper shaft hole inlay 2-41 in the upper flange plate base 1-42. The exhaust section inlay 2-43 is roughly in the shape of a bent finger, with the bent portion facing the upper shaft hole inlay 2-41.

[0036] Figure 4 It is a vertical cross-sectional view of the upper flange plate base 1-42 of the upper bearing cover 4, showing the position of the upper shaft hole insert 2-41 in the upper flange plate base 1-42.

[0037] Figure 5 It is a vertical cross-sectional view of the upper shaft hole insert 2-41. As shown in the figure, the upper shaft hole insert 2-41 is a hollow cylindrical component, and the hollow part constitutes the upper shaft hole portion 411. The lower part of the upper shaft hole insert 2-41 that contacts the upper flange plate base 1-42 of the upper bearing cover 4 is provided with a circumferential upper shaft hole annular groove 45 and an upper shaft hole protrusion 46. The upper shaft hole annular groove 45 and the upper shaft hole protrusion 46 are used to increase the bonding force with the upper flange plate base 1-42, and can prevent axial displacement between the upper flange plate base 1-42 and the upper shaft hole insert 2-41; the outer surface of the upper shaft hole protrusion 46 is provided with a vertical texture (not shown), and the vertical texture is also used to increase the bonding force with the upper flange plate base 1-42, and can prevent circumferential displacement between the upper flange plate base 1-42 and the upper shaft hole insert 2-41.

[0038] Figure 6 It is a schematic diagram of the structure of the exhaust portion inlay 2-43. As shown in the figure, the exhaust portion 421 is provided on the exhaust portion inlay 2-43, and the exhaust portion 421 is provided in the exhaust portion inlay 2-43 perpendicular to the direction of the paper surface; in order to ensure the positioning of the exhaust portion inlay 2-43 and the upper shaft hole inlay 2-41 during injection or die casting, in a preferred embodiment, the side of the exhaust portion inlay 2-43 has a curved surface 44 that fits the outer wall of the upper shaft hole inlay 2-41.

[0039] Figure 7Another exhaust part insert of the present invention can be formed by injection or die casting of the exhaust part insert 2-43 and the upper bearing cover base material through subsequent machining. Figure 7 The exhaust section 421 in the embodiment of the present invention.

[0040] Figure 8 It is a horizontal cross-sectional view of an air suction seat inlay and a vane seat inlay in a ring-shaped cylinder body. The air suction seat and the vane seat are arranged on corresponding inlays.

[0041] Fig. 9 , Fig.10 , Fig.11 The right view, the front view and the left view of the slide seat inlay; the slide seat inlay 2-7 includes a slide seat 7 for accommodating the slide 8, and the slide seat 7 is provided with an opening that passes through the slide seat 7 vertically (perpendicular to the paper surface). On the outer surface of the slide seat inlay 2-7, there are grooves 71 that cross horizontally and vertically. The grooves 71 are used to increase the bonding force between the slide seat inlay 2-7 and the base material, and ensure that the slide seat inlay 2-7 is firmly bonded to the cylinder base material; from the direction perpendicular to the paper surface, Fig.10 The left side surface is an inclined surface, which forms a certain angle with the longitudinal center line of the slide seat inlay 2-7.

[0042] Fig.12 It is a vertical cross-sectional view of the suction seat insert 2-6; the suction seat insert 2-6 is roughly a hollow cylindrical component, the hollow part is the suction seat 6, and the outer circumference of the cylindrical component is provided with a circumferential annular groove 62 and a circumferential protrusion 63, which have the same function as the vane seat insert 2-7, and are used to increase the bonding force between the suction seat insert 2-6 and the base material, and ensure the firm bonding between the suction seat insert 2-6 and the cylinder base 1-11 material. From the direction perpendicular to the paper, Fig.12 As shown, the right side surface of the suction seat inlay 2-6 is an inclined surface, which forms a certain angle with the longitudinal center line of the suction seat inlay 2-6.

[0043] like Figure 8 As shown, after the suction seat inlay 2-6 and the vane seat inlay 2-7 are placed in the mold or the cylinder body 11 containing the above-mentioned inlays is injection or die-cast, the inclined surface on the right side of the suction seat inlay 2-6 contacts and cooperates with the inclined surface on the left side of the vane seat inlay 2-7, and the longitudinal center line of the suction seat inlay 2-6 intersects with the longitudinal center line of the vane seat inlay 2-7 at the center of the cylinder body 11.

[0044] During injection or die casting, the circumferential annular groove 62 of the suction seat insert 2-6 and the groove 71 of the vane seat insert 2-7 are filled with the lightweight material forming the cylinder body 11, and the triangular parts adjacent to the suction seat insert 2-6 and the vane seat insert 2-7 are also filled with the lightweight material forming the cylinder body 11, thereby ensuring that the above-mentioned inserts are firmly combined with the cylinder body base 1-11, which can prevent the suction seat insert 2-6 from axial relative displacement in the cylinder body base 1-11, and can also prevent the suction seat insert 2-6 from circumferential relative displacement in the cylinder body base 1-11.

[0045] In a preferred embodiment, Fig.13 , Fig.14 , Fig.15 , Fig.16 As shown, the right side view, front view, vertical cross-sectional view, and left side view of another slide seat inlay, the slide seat inlay 2-7 can be replaced by Fig. 9 , Fig.10 , Fig.11 The slide seat inlay 2-7 includes a slide seat 7 for accommodating a slide 8, and an opening is provided in the slide seat 7 for passing through the slide seat 7 vertically and horizontally. On the outer surface of the slide seat inlay 2-7, there are grooves 71 intersecting horizontally and vertically, and the grooves 71 are used to increase the bonding force between the slide seat inlay 2-7 and the base material, and ensure that the slide seat inlay 2-7 is firmly bonded to the cylinder base material; from the direction perpendicular to the paper surface, Fig.14 The left side surface is an inclined surface, which forms a certain angle with the longitudinal center line of the slide seat inlay 2-7; Fig.14 As shown, a countersunk hole 73 is formed downwardly through the top of the slide seat inlay, and the countersunk hole 73 is used to accommodate the elastic member.

[0046] In a preferred embodiment, Fig.17 The schematic diagram of the structure of the annular cylinder body with an integrated inlay of the suction seat and the slide seat, wherein the integrated inlay 2-9 is replaceable Figure 8 The suction seat inlay 2-6 and the slide seat inlay 2-7 are arranged in such a way that the suction seat 6 and the slide seat 7 are both arranged on an integrated inlay 2-9, and the integrated inlay 2-9 is provided with a recessed groove hole 73 extending downward from the top of the slide seat 7, and the function of the recessed groove hole 73 is to accommodate the elastic member; the integrated inlay 2-9 can facilitate the machining of the suction seat 6 and the slide seat 7, and multiple integrated inlays 2-9 can be processed in one machining, and large-scale production and processing can be carried out, which can not only improve production efficiency but also ensure the consistency of product quality.

[0047] In a preferred embodiment, Fig.18 The schematic diagram of another annular cylinder body with an integrated inlay of an air suction seat and a vane seat is shown in FIG. Fig.17 The structure of the integrated inlay 2-9 is similar, except that the top of the outer peripheral surface of the integrated inlay 2-9 located at the slide seat 7 is closed.

[0048] Fig.19 , Fig. 20 , Fig.21 correspond Fig.18 The right view, front view and left view of the integrated inlay 2-9; the integrated inlay 2-9 is provided with a slide seat 7 and an air suction seat 6 for accommodating the slide 8, the slide seat 7 has an opening that runs through the top and bottom (perpendicular to the paper surface), and on the outer surface of the inlay 2-9 (i.e., the first side surface 95 on the right side and the second side surface 96 on the left side), there are grooves 91 that cross horizontally and vertically, and the grooves 91 are used to increase the bonding force between the inlay 2-9 and the cylinder body base 1-11 material, and ensure that the inlay 2-9 and the cylinder body base 1-11 are firmly bonded; from the direction perpendicular to the paper surface, Fig. 20 The second side surface 96 on the left side and the first side surface 95 on the right side are both vertical surfaces. The second side surface 96 is inclined to the axis of the suction seat 6, and the first side surface 95 is parallel to the center line of the slide seat 7. The corners of the second side edge 96 and the inner peripheral surface of the cylinder base 1-11 are provided with a rounded structure of the avoidance portion 93, the purpose of the avoidance portion 93 is to allow the connection piece to pass through, and the connection piece connects the upper bearing cover 4, the cylinder 11, and the lower bearing cover 5; Fig. 20 As shown, the outer circumference of the integrated insert 2-9 slide seat 7 away from the center of the cylinder body is closed.

[0049] Fig. 22 , Fig.23 , Fig.24 , Fig.25 correspond Fig.17 The right side view, front view, sectional view and left side view of the integrated inlay; the integrated inlay 2-9 and Fig.19 , Fig. 20 , Fig.21 The integrated inlay 2-9 is substantially the same, except that a recessed hole 73 is provided on the outer peripheral surface of the integrated inlay 2-9 and on the top of the slide seat 7, and the recessed hole 73 is used to accommodate an elastic member such as a spring.

[0050] Fig.26 is a horizontal cross-section of the lower bearing cover. Fig.26 The position of the lower shaft hole insert 2-51 in the lower flange plate base 1-52 is shown.

[0051] Fig.26 It is a vertical cross-sectional view of the lower bearing cover, in which the lower shaft hole insert 2-51 is a hollow cylinder, and the hollow part of the lower shaft hole insert 2-51 forms the lower shaft hole portion 511.

[0052] Fig.28It is a cross-sectional view of the lower shaft hole inlay. A plurality of circumferential lower shaft hole annular grooves 54 and at least one lower shaft hole protrusion 55 are arranged on the outer peripheral surface of the cylinder. By arranging the lower shaft hole annular grooves 54 and the lower shaft hole protrusions 55, a better combination of the lower shaft hole inlay 2-51 and the lower flange plate base 1-52 can be achieved. Part of the lower flange plate base 1-52 will be filled in the gap between the lower shaft hole protrusion 55 and the lower shaft hole annular groove 54 to prevent the lower flange plate base 1-52 and the lower shaft hole inlay 2-51 from axial relative displacement.

[0053] Fig.29 It is a cross-sectional view of the combination of the cylinder base, the suction seat insert 2-6, and the slide seat insert 2-7. The cylinder base 1-11 is different from Figure 8 The cylinder body base 1 - 11 has a middle annular structure, and the cover body base 1 - 11 has an arc-shaped protrusion protruding from the annular structure. The arc-shaped protrusion is used to increase the axial length of the suction seat 6 and the center length of the sliding vane seat 7.

[0054] Fig.30 It is a cross-sectional view of the cylinder base and the integrated insert 2-9. The cylinder base 1-11 is different from Fig.18 The cylinder body base has a middle annular structure, and the cover body base 1 - 11 has an arc-shaped protrusion protruding from the outside of the annular structure. The arc-shaped protrusion is used to increase the axial length of the suction seat 6 and the center length of the sliding vane seat 7.

[0055] Fig.31 It is a cross-sectional view of the combination of the cylinder base, the suction seat insert 2-6, and the slide seat insert 2-7. The cylinder base 1-11 is different from Fig.29 The middle cylinder body base 1-11 and the cover body base 1-11 are also provided with a connecting portion 98 on the opposite side of the arc-shaped protrusion. The connecting portion 98 has a connecting hole through which a connecting piece passes. The connecting piece is used to connect the cylinder body, the upper bearing cover and the lower bearing cover.

[0056] Fig.32 It is a cross-sectional view of the cylinder base and the integrated insert 2-9. The cylinder base 1-11 is different from Fig.30 The middle cylinder body base 1-11 and the cover body base 1-11 are also provided with a connecting portion 98 on the opposite side of the arc-shaped protrusion. The connecting portion 98 has a connecting hole through which a connecting piece passes. The connecting piece connects the cylinder body, the upper bearing cover and the lower bearing cover.

[0057] In a preferred embodiment of the upper bearing cap 4, as Figure 1 , 2 , 3, 4, 5, 6, first, make Figure 1 , 2 The injection or die-casting mold of the upper bearing cover 4 shown in FIG. Figure 5 The upper shaft hole insert 2-41 shown, and Figure 6The exhaust section inlay 2-43 shown; third, the upper shaft hole inlay 2-41 and the exhaust section inlay 2-43 are placed and fixed in the above-mentioned mold; fourth, a lightweight material such as aluminum alloy, magnesium alloy, titanium alloy or engineering plastic is injected or pressed into the mold as a matrix material, and taken out after cooling and forming, so as to obtain the upper bearing cover 4 containing the above-mentioned inlay.

[0058] The material and shape of the upper shaft hole insert 2-41 are consistent with those of the upper shaft sleeve 41 in the prior art. The upper shaft hole insert 2-41 is provided with an upper shaft hole portion 411, so that the long axis 21 of the crankshaft 2 directly contacts the upper shaft hole portion 411 of the upper shaft hole insert 2-41 by friction. Figure 6 The finger-shaped object shown has an exhaust portion 421 extending therethrough, or the upper bearing cover 4 is processed with the exhaust portion 421 according to specific requirements after injection or die casting, and the exhaust portion 421 is connected to the exhaust pipe, so that the exhaust portion 421 can be coaxially connected to the exhaust hole. In summary, replacing the material of the upper bearing cover 4 except the insert with a lightweight material can achieve a lightweight design of the upper bearing cover 4 while meeting the requirements of wear resistance and coaxiality.

[0059] In a preferred embodiment of the cylinder 11, Figure 1 , 2 , 8, 9, 10, 11, 12, first, make Figure 1 , 2 The injection or die-casting mold of the cylinder body 11 shown in FIG. 1 is as follows: Fig. 9 , Fig.10 , Fig.12 The slide seat insert 2-7 shown, Fig.12 The suction seat insert 2-6 shown; third, the slide seat insert 2-7 and the suction seat insert 2-6 are placed and fixed in the above-mentioned mold; fourth, a lightweight material such as aluminum alloy, magnesium alloy, titanium alloy or engineering plastic is injected or pressed into the mold as a matrix material, and taken out after cooling and forming, so as to obtain a cylinder body 11 containing the above-mentioned inserts.

[0060] A vane seat 7 is formed in the vane seat insert 2-7 to meet the wear-resistant requirements of the vane 8 when moving in the vane seat 7, and an intake seat 6 is formed in the intake seat insert 2-6 to meet the coaxiality requirements of the intake seat 6 and the intake pipe; in summary, replacing the materials of the cylinder body 11 except the insert with lightweight materials can achieve a lightweight design of the cylinder body 11 while meeting the requirements of wear resistance and coaxiality.

[0061] In a preferred embodiment of the lower bearing cap 5, Figure 1 , 2 , 26, 27, and 28, first, make Figure 1 , 2, 26, 27 as shown in the injection or die-casting mold of the lower bearing cover 5; secondly, make Fig.28 The lower shaft hole inlay 2-51 shown in the figure; third, the lower shaft hole inlay 2-51 is placed and fixed in the above-mentioned mold; fourth, a lightweight material such as aluminum alloy, magnesium alloy, titanium alloy or engineering plastic is injected or pressed into the mold as a matrix material, and taken out after cooling and forming, so as to obtain the lower bearing cover 5 containing the above-mentioned inlay.

[0062] The material and shape of the lower shaft hole inlay 2-51 are consistent with those of the lower shaft sleeve 51 in the prior art, and a lower shaft hole portion 511 is provided through the lower shaft hole inlay 2-51, so that the short shaft 23 is in direct frictional contact with the lower shaft hole portion 511 in the lower shaft hole inlay 2-51; in summary, replacing the material of the lower bearing cover 5 except the inlay with a lightweight material and replacing it with the lower flange plate base 1-52 can achieve a lightweight design of the lower bearing cover 5 while meeting the requirements of wear resistance and coaxiality.

[0063] For the compressor pump body of the present invention, except for the inlays, namely the upper shaft hole inlay 2-41, the exhaust part inlay 2-43, the suction seat inlay 2-6, the vane seat inlay 2-7 and the lower shaft hole inlay 2-51, the upper bearing cover 4, the cylinder body 11 or the lower bearing cover 5 are replaced with lightweight materials, and the upper bearing cover 4, the cylinder body 11 and the lower bearing cover 5 with the above-mentioned inlays are manufactured by injection or die casting, thereby realizing a lightweight design of the compressor pump body while meeting the requirements of wear resistance or coaxiality.

[0064] In other words, in the present invention, the crankshaft 2, piston 3, and vane 8 as moving parts are cast iron parts, steel castings, or other metallurgical parts of the prior art; at least one of the upper bearing cover 4, lower bearing cover 5, and cylinder body 11 as fixed parts is a composite part formed by a lightweight material as a base material and an inlay, that is, the relative friction part between the composite part and the moving part or the part that needs to be connected to the external air inlet and outlet pipes is provided with an inlay, and the remaining parts of the composite part are made of lightweight material as a base; the composite part is formed by the inlay fixed in the mold by injection or die-casting of a lightweight material, and the lightweight material is preferably an aluminum alloy or a magnesium alloy or a titanium alloy or an engineering plastic. Therefore, the composite part can meet both the lightweight requirements of the pump body and the wear resistance requirements of the moving parts.

[0065] In a preferred embodiment, Figure 2As shown, in this embodiment, a double-cylinder compressor pump body is provided. The difference between the double-cylinder compressor pump body and the single-cylinder compressor pump body in embodiment 1 is that the compressor pump body in embodiment 2 has two cylinder bases 1-11, a partition 12 is arranged between the two cylinder bases 1-11, the crankshaft 2 has two eccentric shafts 22, and the two eccentric shafts 22 are arranged in the corresponding cylinder bases 1-11. The number of upper bearing caps 4 and lower bearing caps 5 is the same as that of upper bearing caps 4 and lower bearing caps 5 in embodiment 1; the number of sliding vane seats 7 and suction seats 6 is the same as that of cylinder 11 in embodiment 2, both of which are 2; Therefore, for the compressor pump body with two cylinders, at least one of the upper bearing cover 4, the lower bearing cover 5, and the two cylinder bodies 11 as fixing parts is made of a composite of an inlay and a lightweight material.

[0066] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A rotor compressor pump body, comprising: A cylinder body, wherein a compression chamber is provided inside the cylinder body, and a vane seat and an air suction seat for accommodating a vane are radially opened on the inner peripheral wall; The crankshaft consists of a long shaft portion, an eccentric shaft and a short shaft portion; piston; An upper bearing cap is arranged on the top of the cylinder body and has an upper sleeve for the long axis portion of the crankshaft to pass through; A lower bearing cap is arranged at the bottom of the cylinder body and has a lower sleeve for the short shaft portion of the crankshaft to pass through; The upper bearing cover, the piston and the lower bearing cover are sequentially sleeved on the crankshaft along the axial direction of the crankshaft to form a dynamic seal with the cylinder body; The invention is characterized in that at least one of the cylinder body, the upper bearing cover and the lower bearing cover is formed by a composite of an insert and a light material.

2. A rotor compressor pump body according to claim 1, characterized in that: When there are a plurality of cylinder bodies arranged vertically, a partition plate is arranged between the cylinder bodies.

3. A rotor compressor pump body according to claim 1 or 2, characterized in that: The upper bearing cover comprises the upper sleeve and the upper flange plate; The inlay is an upper shaft hole inlay, and its outer dimensions are consistent with those of the upper shaft sleeve.

4. A rotor compressor pump body according to claim 3, characterized in that: The inserts also include exhaust inserts.

5. A rotor compressor pump body according to claim 4, characterized in that: The upper bearing cover is formed by integrally injecting or die-casting the exhaust portion insert and the upper shaft hole insert with a lightweight material.

6. A rotor compressor pump body according to claim 4, characterized in that: The side edge of the exhaust part insert has an arc surface that fits the outer wall of the upper shaft hole insert.

7. A rotor compressor pump body according to claim 1 or 2, characterized in that: The lower bearing cover comprises a lower sleeve and a lower flange plate; The inlay is a lower shaft hole inlay, and its outer dimensions are consistent with those of the lower shaft sleeve.

8. A rotor compressor pump body according to claim 7, characterized in that: The lower bearing cover is formed by integrally injecting or die-casting the lower shaft hole insert and the light material.

9. A rotor compressor pump body according to claim 1 or 2, characterized in that: The inlay is a slide seat inlay and / or an air suction seat inlay.

10. A rotor compressor pump body according to claim 9, characterized in that: When the insert in the cylinder body is a slide seat insert, the slide seat insert has the slide seat which moves relative to the end of the slide.

11. A rotor compressor pump body according to claim 9, characterized in that: When the insert in the cylinder body is a suction seat insert with a hollow structure, the suction seat insert has a through suction seat, and the suction seat is communicated with the compression chamber in the cylinder body.

12. A rotor compressor pump body according to claim 11, characterized in that: When the inlays in the cylinder body are vane seat inlays and suction seat inlays, the suction seat inlay has an inclined slope, and the suction seat inlay slope is fitted with the outer wall of one side of the vane seat inlay. The axis of the suction seat inlay intersects with the center line of the vane seat inlay at one point, which is the center of the cross section of the cylinder body compression chamber.

13. A rotor compressor pump body according to claim 9, characterized in that: The cylinder body is formed by integrally injecting or die-casting the suction seat insert and / or the vane seat insert with a lightweight material.

14. A rotor compressor pump body according to claim 1, characterized in that: The inlay is made of cast iron, cast steel or other metallurgical profiles.

15. A rotary compressor pump body according to claim 1, characterized in that: The lightweight material is aluminum alloy, magnesium alloy, titanium alloy or engineering plastic.

16. A rotor compressor pump body according to claim 3, characterized in that: An upper shaft hole annular groove is formed on the outer peripheral wall of the upper shaft hole insert, and an upper shaft hole protrusion is arranged in the upper shaft hole annular groove.

17. A rotary compressor pump body according to claim 7, characterized in that: The outer peripheral wall of the lower shaft hole insert is provided with a lower shaft hole annular groove, and the lower shaft hole protrusion is arranged in the lower shaft hole annular groove.

18. A rotary compressor pump body according to claim 9, characterized in that: The two side planes of the slide seat inlay are provided with horizontally and vertically intersecting grooves.

19. A rotor compressor pump body according to claim 9, characterized in that: The axial outer peripheral wall of the suction seat insert is provided with a circumferential annular groove and a circumferential protrusion.

20. A method for manufacturing a rotary compressor pump body according to any one of claims 1 to 19, characterized in that: The steps include: (1) Injection or die-casting molds for making upper bearing caps, cylinder blocks or lower bearing caps; (2) Making upper shaft hole inlays, exhaust part inlays, vane seat inlays, suction seat inlays or lower shaft hole inlays; (3) placing and fixing the above-mentioned inlay in the corresponding above-mentioned mold; (4) Injecting or pressing a lightweight material as a base material into a mold, and taking it out after cooling and forming, thereby obtaining an upper bearing cover, a cylinder block or a lower bearing cover containing the above-mentioned insert; (5) The upper bearing cover, cylinder block or lower bearing cover containing the above-mentioned insert are assembled in sequence with the crankshaft and piston to form the rotor compressor pump body.

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