Upper bearing cover of rotor type compressor pump body and manufacturing method

Abstract

The invention relates to an upper bearing cover of a rotor type compressor pump body and a manufacturing method. The upper bearing cover is formed by compounding an insert and a light material. The insert is a shaft sleeve insert and / or an exhaust hole insert which form the upper shaft sleeve, the light material is aluminum alloy or magnesium alloy or titanium alloy or engineering plastic, and the light material forms the flange plate base body. The insert is made of an iron casting, a steel casting or a metal profile. The shaft sleeve insert ensures the wear resistance of the upper bearing cover, the exhaust hole insert and an external exhaust pipeline can meet the requirements of connection coaxiality and certain connection strength, and the flange plate base body made of a light material can reduce the overall weight of the upper bearing cover; and meanwhile, the overall production cost of the upper bearing cover can be reduced, and energy conservation and environmental protection are facilitated.

Description

Technical Field

[0001] The invention relates to a rotor compressor pump body, in particular to an upper bearing cover of the rotor compressor pump body, and also relates to a manufacturing method of the upper bearing cover. 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 rotary 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 conventional upper bearing cover is a cast iron part or a metallurgical part, which results in a large weight of the upper bearing cover, and thus a large weight and rotational inertia of the entire compressor pump body. However, replacing the upper bearing cover with a low-density material will greatly reduce the weight and rotational inertia of the entire machine, but the low-density material cannot meet the requirements of wear resistance; In summary, how to achieve a lightweight design for the upper bearing cover while meeting the requirements of wear resistance has become an urgent problem that researchers in this field need to solve. Summary of the invention

[0004] The technical problem to be solved by the present invention is: how to achieve lightweighting of the upper bearing cover while meeting the requirements of wear resistance; In order to solve the above technical problems, the technical solution adopted by the present invention is: The invention discloses an upper bearing cover of a rotor compressor pump body, comprising an upper shaft sleeve and an upper flange plate. The upper bearing cover is composited by an inlay and a light material.

[0005] Furthermore, the inlay is a sleeve inlay and / or an exhaust hole inlay constituting an upper sleeve, the lightweight material is an aluminum alloy or a magnesium alloy or a titanium alloy or an engineering plastic, and the lightweight material constitutes a flange plate matrix.

[0006] Furthermore, the inlay is made of cast iron, cast steel or metal profile.

[0007] Furthermore, the upper bearing cover is formed by integrally injecting or die-casting the insert and the lightweight material.

[0008] Furthermore, a plurality of circumferential annular grooves are provided at the junction between the outer peripheral wall of the lower part of the sleeve insert and the flange plate base, and a circumferential protrusion is provided in the annular groove.

[0009] Furthermore, the outer surface of the protrusion is provided with a plurality of vertical textures.

[0010] Furthermore, the exhaust hole inlay is provided with an exhaust hole, and the exhaust hole is communicated with the compression chamber in the cylinder body.

[0011] Furthermore, the exhaust hole inlay has an arc-shaped surface that fits with the shaft sleeve inlay.

[0012] A method for manufacturing an upper bearing cover of a rotor compressor pump body, characterized in that it comprises the following steps: (1) making an injection or die-casting mold for the upper bearing cover; (2) making a shaft sleeve insert and / or an exhaust hole insert; (3) placing and fixing the shaft sleeve insert and the exhaust hole insert in the above-mentioned mold; (4) injecting or pressing a lightweight material as a base material into the mold, and taking it out after cooling and forming, so as to obtain an upper bearing cover containing the above-mentioned inserts.

[0013] The beneficial effects of the present invention are as follows: the present invention is an upper bearing cover of a rotor compressor pump body, in which a shaft sleeve inlay and an exhaust hole inlay are formed with a lightweight material by injection or die-casting, the inlay adopts the material in the prior art, the shaft sleeve inlay ensures the wear resistance of the upper bearing cover, the exhaust hole inlay and the external exhaust pipe can also meet the connection coaxiality and certain connection strength requirements, and the flange plate substrate of the lightweight material can reduce the overall weight of the upper bearing cover; at the same time, the upper bearing cover of the present invention can also reduce the overall production cost of the upper bearing cover, and is also beneficial to energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a structural schematic diagram of a rotor compressor pump body in the prior art; Figure 2 is a vertical cross-sectional view of the upper bearing cap of the present invention; Figure 3 is a cross-sectional view of the shaft sleeve insert of the present invention; Figure 4 is a horizontal cross-sectional view of the upper bearing cover of the present invention; Figure 5 is a cross-sectional view of the vent insert of the present invention; Figure 6 It is a side view of the vent insert of the present invention. DETAILED DESCRIPTION

[0016] 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.

[0017] The rotor compressor pump body of the prior art is as follows Figure 1As shown, the compressor pump body includes a cylinder body 11, a crankshaft 2 having a long axis 21, an eccentric portion 22 and a short axis 23, an upper bearing cover 4 arranged on the top of the cylinder body 11, and a lower bearing cover 5 arranged on the bottom of the cylinder body 11; the eccentric portion 22 of the crankshaft 2 is located in the cylinder body 11, and a piston 3 is arranged on the outer sleeve of the eccentric portion 22; the upper bearing cover 4 is composed of an upper sleeve 41 and an upper flange plate 42, which is generally machined from a cast iron or cast steel blank, or machined from a suitable metal profile, and an exhaust hole 421 (not shown) is opened on the upper flange plate 42, and the exhaust hole 42 1 is connected to the external exhaust pipe; the lower bearing cover 5 is composed of a lower sleeve 51 and a lower flange plate 52, which is generally made of cast iron or cast steel material after casting a blank and then machined, or is machined from a suitable metal profile; the long axis 21 of the crankshaft 2 is located in the upper shaft hole of the upper sleeve 41, and the short axis 23 of the crankshaft 2 is located in the lower shaft hole of the lower sleeve 51; the inner peripheral wall of the cylinder body 11 is provided with an air intake portion (not shown) for air intake, and the air intake portion is connected to the air intake pipe; and a slide vane slot seat is provided, in which a slide vane 8 is arranged, and the end of the slide vane 8 is sealed with the piston 3.

[0018] The upper bearing cap of the present invention is as follows Figure 2 , Figure 4 As shown; Figure 2 is a vertical cross-sectional view of the upper bearing cover of the present invention, Figure 4 4 is a horizontal cross-sectional view of the upper bearing cover of the present invention. The upper bearing cover 4 of the present invention has the same structure and appearance as the upper bearing cover of the prior art, and is also composed of an upper sleeve 41 and an upper flange plate 42. The difference is that the upper sleeve 41 is composed of a sleeve insert 2-41 embedded in a flange plate substrate 1-42, and the upper flange plate 42 is composed of a flange plate substrate 1-42 and an exhaust hole insert 2-43 embedded in the flange plate substrate 1-42; in a preferred embodiment of the present invention, the sleeve insert 2-41 and the exhaust hole insert 2-43 are made of the same material as the upper bearing cover of the prior art, and the flange plate substrate 1-42 is made of a lightweight material such as aluminum alloy, magnesium alloy, titanium alloy or engineering plastic, so that the sleeve insert 2-41 and the long axis 21 of the crankshaft 2 can meet the wear resistance requirements, and the exhaust hole insert 2-43 and the exhaust pipe can also meet the connection coaxiality and a certain connection strength requirements, and the flange plate substrate 1-42 made of lightweight materials can meet the requirements of lightweight design of the upper bearing cover.

[0019] Figure 3It is a cross-sectional view of the shaft sleeve insert of the present invention, which shows the general structure of the shaft sleeve insert 2-41 of the present invention. The shaft sleeve insert 2-41 is a hollow cylindrical structure. The portion of the outer peripheral wall at the lower part of the shaft sleeve insert 2-41 connected to the flange plate base 1-42 is provided with circumferential upper shaft hole annular grooves 45 and upper shaft hole protrusions 46 located between the annular grooves 45. The upper shaft hole annular grooves 45 are at least two, and the outer surface of the upper shaft hole protrusion 46 is also provided with a plurality of vertical textures; the hollow portion of the shaft sleeve insert forms an upper shaft hole portion 411, and the major axis 21 of the crankshaft 2 passes through the upper shaft hole portion 411, and generates relative friction with the inner wall of the upper shaft hole portion 411.

[0020] See below Figure 4 , Figure 5 and Figure 6 , the vent insert is described in detail. Figure 4 is a horizontal cross-sectional view of the upper bearing cover of the present invention, Figure 5 is a cross-sectional view of the vent insert of the present invention, Figure 6 It is a side view of the vent insert of the present invention; the vent insert 2-43 is a thin sheet-shaped finger-shaped object, and its thickness is the same as the thickness of the flange plate base 1-42 of the upper bearing cover. The vent insert 2-43 is provided with a vent hole 421. In a preferred embodiment of the present invention, the vent insert 2-43 does not have a vent hole 421, and the vent hole 421 can be formed by processing after the upper bearing cover is injection or die-cast. In another preferred embodiment, the left side of the vent insert 2-43 has an arc surface 44 to ensure the positioning of the vent insert 2-43 and the sleeve insert 2-41 during injection or die-casting; Figure 4 As shown, the side of the vent inlay 2-43 has an arc surface 44 that fits the outer wall of the sleeve inlay 2-41. In another preferred embodiment, in order to ensure the connection strength between the flange plate base 1-42 and the vent inlay 2-43, a groove 47 is provided at the outer wall of the vent inlay 2-43, and the groove 47 is opened along the outer contour of the vent inlay 2-43.

[0021] The present invention also provides a method for manufacturing an upper bearing cap. First, a method for manufacturing an upper bearing cap is as follows: Figure 2 , 4 The injection or die casting mold of the upper bearing cover shown in FIG. Figure 3 The sleeve insert 2-41 shown, and Figure 5 , Figure 6The exhaust hole inlay 2-43 shown; third, the sleeve inlay 2-41 and the exhaust hole 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.

[0022] 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. An upper bearing cover of a rotor compressor pump body, comprising an upper sleeve and an upper flange plate, characterized in that: The upper bearing cover is composed of an inlay and a light material; the inlay is a sleeve inlay and / or an exhaust hole inlay constituting the upper sleeve.

2. The upper bearing cover according to claim 1, characterized in that: The lightweight material is aluminum alloy, magnesium alloy, titanium alloy or engineering plastic, and the lightweight material constitutes the flange plate matrix.

3. The upper bearing cover of a rotor compressor pump body according to claim 1, characterized in that: The inlay is made of cast iron, cast steel or metal profile.

4. The upper bearing cover of a rotor compressor pump body according to claim 2, characterized in that: The upper bearing cover is formed by integrally injecting or die-casting the insert and the lightweight material.

5. The upper bearing cover of a rotor compressor pump body according to claim 2, characterized in that: A plurality of circumferential annular grooves are arranged at the joint between the outer peripheral wall of the lower part of the sleeve insert and the flange plate base, and a circumferential protrusion is arranged in the annular groove.

6. The upper bearing cover of a rotor compressor pump body according to claim 5, characterized in that: The outer surface of the protrusion is provided with a plurality of vertical textures.

7. The upper bearing cover of a rotor compressor pump body according to claim 2, characterized in that: The exhaust hole inlay is provided with an exhaust hole, and the exhaust hole is communicated with the compression chamber in the cylinder body.

8. The upper bearing cover of a rotor compressor pump body according to claim 2, characterized in that: A groove body is arranged on the outer wall of the exhaust hole inlay, and the groove body is opened along the outer contour of the exhaust hole inlay.

9. The upper bearing cover of a rotor compressor pump body according to claim 7, characterized in that: The exhaust hole insert has an arc surface that fits with the shaft sleeve insert.

10. A method for manufacturing an upper bearing cover of a rotor compressor pump body according to any one of claims 1 to 9, characterized in that: The steps include: (1) Making the injection or die-casting mold for the upper bearing cover; (2) Making sleeve inserts and / or vent inserts; (3) placing and fixing the sleeve insert and the vent insert in the mold; (4) A lightweight material is injected or pressed into a mold as a base material, and after cooling and forming, it is taken out to obtain an upper bearing cover containing the above-mentioned insert.

Images