Pump body assembly and rotary fluid equipment

Abstract

The invention provides a pump body assembly and rotary fluid equipment, the pump body assembly comprises an air cylinder, an air cylinder cavity is formed in the air cylinder, an air suction hole and a heat insulation groove are formed in the side wall of the air cylinder, the air suction hole communicates with the air cylinder cavity, and the heat insulation groove is located on the outer side of the air suction hole; a heat insulation piece is arranged in the heat insulation groove; the heat insulation piece is made of a ceramic heat insulation material, or the surface of the heat insulation groove and / or the surface of the heat insulation piece are / is coated with the ceramic heat insulation material; heat transfer from the cylinder body of the cylinder to the air suction hole is reduced, so that air suction heat is reduced, air suction loss is avoided, volume efficiency is improved, and operation energy efficiency of the pump body assembly is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of fluid equipment, and particularly relates to a pump body assembly and a rotary fluid equipment. Background Art

[0002] An air cylinder has an air cylinder cavity formed inside, and an air suction hole is formed in the cylinder block of the air cylinder; when the pump body assembly operates, low-temperature and low-pressure gas outside the air cylinder cavity enters the air cylinder cavity through the air suction hole, is compressed and then transformed into high-temperature and high-pressure gas and discharged from the air cylinder cavity; under the action of heat transfer, the temperature of the cylinder block rises synchronously; when the low-temperature gas flows through the air suction hole, it will be heated by the hole wall of the air suction hole, resulting in the expansion of the inhaled gas due to temperature rise, the reduction of the air suction volume, the decrease of the volumetric efficiency, and ultimately the decline of the operation energy efficiency of the pump body assembly. Summary of the Invention

[0003] In view of this, the present invention provides a pump body assembly and a rotary fluid equipment to solve the problem in the prior art that the temperature of the cylinder block is transmitted to the air suction hole, resulting in the expansion of the inhaled gas due to temperature rise, the reduction of the air suction volume, the decrease of the volumetric efficiency, and ultimately the decline of the operation energy efficiency of the pump body assembly.

[0004] The present invention provides a pump body assembly, including an air cylinder; an air cylinder cavity is formed inside the air cylinder, and an air suction hole communicating with the air cylinder cavity is formed in the side wall of the air cylinder;

[0005] An insulating groove is further formed in the side wall of the air cylinder outside the air suction hole, and an insulating member is arranged in the insulating groove;

[0006] The insulating member is made of ceramic insulating material; or,

[0007] The surface of the insulating groove and / or the surface of the insulating member is coated with ceramic insulating material.

[0008] Further optionally, the ceramic insulating material includes at least one of alumina, zirconia, silicon nitride, silicon carbide, mullite and silica aerogel.

[0009] Further optionally, the thermal conductivity of the ceramic insulating material is k, and the specific heat capacity of the ceramic insulating material is C;

[0010] The k and C satisfy: k≤52W / (m·K), C≥450J / (g·℃).

[0011] Further optionally, a rotatable roller is arranged in the air cylinder cavity; a sliding groove is further formed in the side wall of the air cylinder, and a slidable sliding piece is arranged in the sliding groove; one end of the sliding piece is connected in the sliding groove, and the other end abuts against the roller; the sliding piece divides the space between the outer peripheral wall of the roller and the inner peripheral wall of the air cylinder cavity into a suction cavity and an exhaust cavity;

[0012] The air intake hole communicates with the air intake cavity, and the air intake hole is arranged close to the sliding groove;

[0013] The heat insulation groove includes a first heat insulation groove; the first heat insulation groove is formed between the air intake hole and the sliding groove.

[0014] Further optionally, the heat insulation groove further includes a second heat insulation groove arranged opposite to the first heat insulation groove; the second heat insulation groove is formed on a side of the air intake hole away from the sliding groove.

[0015] Further optionally, the cylinder includes a cylinder block; the cylinder block encloses the cylinder cavity, and a side wall of the cylinder block includes an air intake end side wall; the air intake end side wall extends outwards along a direction away from the axis of the cylinder block to form an extension part;

[0016] The extension part and the air intake end side wall are formed with the air intake hole and the sliding groove.

[0017] Further optionally, the extension part is formed with the first heat insulation groove and the second heat insulation groove; along the circumferential direction of the cylinder block, the second heat insulation groove, the air intake hole, the first heat insulation groove and the sliding groove are arranged in sequence;

[0018] The extension part includes a first extension side wall and a second extension side wall arranged opposite to each other in the circumferential direction of the cylinder block, the first extension side wall is away from the second heat insulation groove, and the second extension side wall is close to the second heat insulation groove.

[0019] Further optionally, the minimum distance between the side wall of the first heat insulation groove and the hole wall of the air intake hole is d 11 , and the minimum distance between the side wall of the first heat insulation groove and the side wall of the sliding groove is d 12 ; the d 11 and d 12 satisfy: d 11 ≥ 1.5 mm, d 12 ≥ 1.5 mm;

[0020] The minimum distance between the side wall of the second heat insulation groove and the hole wall of the air intake hole is d 21 , and the minimum distance between the side wall of the second heat insulation groove and the second extension side wall is d 22 ; the d 21 and d 22 satisfy: d 21 ≥ 2.5 mm, d 22 ≥ 2.5 mm.

[0021] Further optionally, the distance between the bottom wall of the second heat insulation groove close to the air intake end side wall and the outer peripheral surface of the air intake end side wall is s, and the s satisfies: s > 0 mm.

[0022] Further optionally, both the first heat insulation groove and the second heat insulation groove communicate with both end faces of the cylinder in the axial direction.

[0023] Further optionally, both the heat insulation member and the heat insulation groove are in a cuboid structure; the length direction of the heat insulation member and the length direction of the heat insulation groove are both parallel to the radial direction of the cylinder, and the height direction of the heat insulation member and the height direction of the heat insulation groove are both parallel to the axial direction of the cylinder;

[0024] The length of the heat insulation member is E, the width of the heat insulation member is F, and the height of the heat insulation member is G; the length of the heat insulation groove is e, the width of the heat insulation groove is f, and the height of the heat insulation groove is g; the E, F, G, e, f, and g satisfy: E ≤ e, F < f, G = g.

[0025] Further optionally, the heat insulation groove is an annular groove, and the annular groove is arranged outside the suction hole;

[0026] The heat insulation member is in an annular structure; or, there are a plurality of heat insulation members, and the plurality of heat insulation members can be spliced into an annular structure.

[0027] Further optionally, the heat insulation groove is a circular ring groove, and the circular ring groove and the suction hole are coaxially arranged; the heat insulation member is in a circular ring structure.

[0028] The present invention further provides a rotary fluid device, and the rotary fluid device is a rotary expander or a sliding vane expander or a rotary compressor, and the rotary fluid device includes the pump body assembly described in any one of the above.

[0029] Further optionally, when the rotary fluid device is a rolling piston compressor, the rolling piston compressor further includes a housing; the housing forms an installation cavity, and the pump body assembly is arranged in the installation cavity; the pump body assembly further includes an upper flange, a lower flange, and a crankshaft, and the upper flange, the cylinder, and the lower flange are arranged in sequence from top to bottom; the upper flange forms an upper flange hole, and the lower flange forms a lower flange hole; the crankshaft includes a long shaft, an eccentric shaft, and a short shaft arranged in sequence from top to bottom, the long shaft is rotatably matched with the upper flange hole, the eccentric shaft is drivingly connected with the roller, and the short shaft is rotatably matched with the lower flange hole;

[0030] When the crankshaft is controlled to rotate, the eccentric shaft can drive the roller to rotate.

[0031] Compared with the prior art, the beneficial effects of the present invention mainly lie in:

[0032] By arranging a heat insulation member in the heat insulation groove outside the air suction hole; the heat insulation member is made of ceramic heat insulation material, or the surface of the heat insulation groove and / or the surface of the heat insulation member is coated with ceramic heat insulation material, the heat transfer from the cylinder block of the cylinder to the air suction hole is reduced, thereby reducing the suction heat, avoiding the over-high temperature of the inhaled gas, reducing the loss of the suction volume, increasing the suction coefficient, refrigerating capacity and volumetric efficiency, and ensuring the operation energy efficiency of the pump body assembly. Description of the Drawings

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained according to the provided drawings.

[0034] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical substance significance. Any modification of the structure, change of the ratio relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.

[0035] Figure 1a and Figure 1b is the front view structural schematic diagram of the cylinder embodiment provided by the present invention;

[0036] Figure 2a and Figure 2b is the axonometric structural schematic diagram of the cylinder embodiment provided by the present invention;

[0037] Figure 3 is the structural schematic diagram of the heat insulation member embodiment provided by the present invention;

[0038] Figure 4 is the axonometric structural schematic diagram of the pump body assembly embodiment provided by the present invention;

[0039] Figure 5 is the sectional structural schematic diagram of the pump body assembly embodiment provided by the present invention;

[0040] Figure 6 is the structural schematic diagram of another cylinder embodiment provided by the present invention;

[0041] Figure 7 is the structural schematic diagram of the rolling rotor type compressor embodiment provided by the present invention;

[0042] In the figure:

[0043] 1 - Cylinder; 11 - Cylinder block; 111 - Cylinder cavity; 112 - Suction cavity; 113 - Exhaust cavity; 114 - Suction - end side wall; 12 - Extension part; 121 - First extension side wall; 122 - Second extension side wall; 13 - Heat - insulation groove; 131 - First heat - insulation groove; 132 - Second heat - insulation groove; 14 - Suction hole; 15 - Slide groove;

[0044] 2 - Heat - insulation part; 21 - First heat - insulation part; 22 - Second heat - insulation part;

[0045] 31 - Roller; 32 - Slider; 33 - Upper flange; 34 - Lower flange; 35 - Crankshaft; 351 - Long shaft; 352 - Eccentric shaft; 353 - Short shaft;

[0046] 41 - Housing; 42 - Motor; 43 - Upper cover; 44 - Lower cover; 45 - Base; 46 - Gas - liquid separator; 47 - Suction pipe; 48 - Exhaust pipe. Detailed implementation mode

[0047] The following specific embodiments illustrate the implementation modes of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0048] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms of "a", "the" and "said" used in the embodiments of the present invention 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.

[0049] It should be understood that the term " / and" used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A / and B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0050] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a commodity or system comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such commodity or system. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the commodity or system comprising said element.

[0051] When the pump body assembly operates, under the action of heat transfer, the temperature of the cylinder block rises synchronously; when the low-temperature gas flows through the suction hole, it will be heated by the hole wall of the suction hole, resulting in the expansion of the inhaled gas due to the temperature rise, the reduction of the suction volume, the reduction of the volumetric efficiency, and ultimately the reduction of the operating energy efficiency of the pump body assembly;

[0052] The present invention creatively provides a pump body assembly, including a cylinder. A cylinder cavity is formed inside the cylinder. A suction hole and a heat insulation groove are formed on the side wall of the cylinder. The heat insulation groove is located outside the suction hole; a heat insulation member is arranged in the heat insulation groove; the heat insulation member is made of ceramic heat insulation material, or the surface of the heat insulation groove and / or the surface of the heat insulation member is coated with ceramic heat insulation material; the heat transfer from the cylinder block to the suction hole is reduced, thereby reducing the suction heat, avoiding the loss of the suction volume, improving the volumetric efficiency, and ensuring the operating energy efficiency of the pump body assembly.

[0053] Embodiment 1

[0054] As Figures 1a to 5 shown, this embodiment provides a pump body assembly; wherein, Figure 1a shows the relative positional relationship between the suction hole and the heat insulation groove in the front view of the cylinder, Figure 1b shows the positional dimension relationship between the heat insulation groove and the first outer extension side wall, the suction hole, and the sliding groove in the front view of the cylinder; Figure 2a shows the relative position between the suction hole and the heat insulation groove in the isometric view of the cylinder, Figure 2b shows the length, height, and width of the first heat insulation groove in the isometric view of the cylinder;

[0055] The pump body assembly includes a cylinder 1 and a heat insulation member 2; a cylinder cavity 111 is formed inside the cylinder 1, and an air suction hole 14 and a heat insulation groove 13 are formed on the side wall of the cylinder 1. The air suction hole 14 communicates with the cylinder cavity 111 and is used to convey low-temperature refrigerant or low-temperature refrigerant medium to the cylinder cavity 111; the heat insulation groove 13 does not communicate with the cylinder cavity 111, the heat insulation groove 13 is located outside the air suction hole 14, and the heat insulation member 2 is arranged in the heat insulation groove 13; relative to the cylinder 1, the heat insulation member 2 is made of a ceramic heat insulation material with low thermal conductivity and high specific heat capacity, which can separate the air suction hole 14 from the cylinder body 11 of the cylinder 1, block the heat transfer of the cylinder body 11 to the air suction hole 14, prevent the high-temperature cylinder body 11 from heating the low-temperature gas flowing through the air suction hole 14, reduce the loss of the air suction volume of the pump body assembly, improve the refrigeration capacity of the pump body assembly, and improve the operating energy efficiency of the pump body assembly;

[0056] Preferably, the air suction hole 14 is a cylindrical hole, and the heat insulation groove 13 is located radially outside the air suction hole 14.

[0057] Furthermore, the ceramic heat insulation material includes at least one of alumina, zirconia, silicon nitride, silicon carbide, mullite, silica aerogel, calcium hexaaluminate, and aluminum titanate; the characteristics of alumina include high temperature resistance (~1800 °C), high mechanical strength, and low cost. The thermal conductivity of alumina is relatively high, and the heat insulation performance can be optimized by combining a porous structure; the characteristics of zirconia include low thermal conductivity (about 2 W / m·K), high temperature resistance (~2400 °C), and good thermal shock resistance. The characteristics of silicon carbide include high high-temperature strength (~1600 °C) and oxidation resistance. The characteristics of mullite include low thermal expansion coefficient, strong thermal shock resistance, and corrosion resistance. The characteristics of silica aerogel include extremely low thermal conductivity (~0.015 W / m·K) and light weight. The characteristics of calcium hexaaluminate include low thermal conductivity (~2.5 W / m·K) and high temperature resistance (~1700 °C). The characteristics of aluminum titanate include extremely low thermal expansion coefficient and excellent thermal shock resistance;

[0058] Preferably, the thermal conductivity of the ceramic heat insulation material is k, and the specific heat capacity of the ceramic heat insulation material is C; k and C satisfy: k ≤ 52 W / (m·K), C ≥ 450 J / (g·°C).

[0059] The structure of the heat insulation groove 13 is not limited. For example, when observing along the length direction of the heat insulation groove 13, the cross-section of the heat insulation groove 13 is rectangular, or polygonal, or wavy, or U-shaped, or annular; the length direction (groove depth direction) of the heat insulation groove 13 can be straight, polygonal, or arc-shaped, and the width of the heat insulation groove 13 (the dimension value in the circumferential direction of the cylinder cavity 111) can be of equal width or unequal width; for example, along the length direction of the heat insulation groove 13 from the outside to the inside of the cylinder cavity 111, the width of the heat insulation groove 13 gradually decreases;

[0060] Preferably, the cylinder cavity 111 is a cylindrical cavity, and the depth direction of the suction hole 14 is parallel or collinear with the radial direction of the cylinder cavity 111; the length direction of the heat insulation groove 13 is parallel or collinear with the radial direction of the cylinder cavity 111. When observing along the length direction of the heat insulation groove 13, the cross-section of the heat insulation groove 13 is rectangular; the width of the heat insulation groove 13 is of equal width.

[0061] The setting position of the heat insulation groove 13 affects the heat insulation effect. The following further describes the setting position of the heat insulation groove 13; a rotatable roller 31 is arranged in the cylinder cavity 111; a sliding groove 15 is further formed on the side wall of the cylinder 1, and a slidable sliding piece 32 is arranged in the sliding groove 15; one end of the sliding piece 32 is connected in the sliding groove 15, and the other end abuts against the roller 31; the sliding piece 32 divides the space between the outer peripheral wall of the roller 31 and the inner peripheral wall of the cylinder cavity 111 into a suction cavity 112 and an exhaust cavity 113;

[0062] The suction hole 14 is communicated with the suction cavity 112, and the suction hole 14 is arranged close to the sliding groove 15; the heat insulation groove 13 includes a first heat insulation groove 131; the first heat insulation groove 131 is formed between the suction hole 14 and the sliding groove 15;

[0063] Specifically, the sliding piece 32 and the sliding groove 15 are connected by an elastic member; an exhaust hole is further formed on the end wall of the cylinder 1, the exhaust hole is communicated with the exhaust cavity 113, and the depth direction of the exhaust hole is parallel to the axial direction of the cylinder cavity 111; when the roller 31 rotates, the sliding piece 32 slides in the sliding groove 15 under the action of the elastic member and the roller 31, the gas outside the cylinder cavity 111 enters the suction cavity 112 through the suction hole 14, and the gas in the exhaust cavity 113 is discharged through the exhaust port;

[0064] Preferably, the suction hole 14 and the sliding groove 15 are arranged at intervals in the circumferential direction of the cylinder cavity 111, and the groove depth direction (length direction) of the sliding groove 15 is parallel or collinear with the radial direction of the cylinder cavity 111.

[0065] Furthermore, the heat insulation groove 13 further includes a second heat insulation groove 132; the first heat insulation groove 131 and the second heat insulation groove 132 are oppositely arranged in the circumferential direction of the cylinder cavity 111, and the first heat insulation groove 131 is formed on the side of the suction hole 14 close to the sliding groove 15, and the second heat insulation groove 132 is formed on the side of the suction hole 14 far from the sliding groove 15;

[0066] A first heat insulation groove 131 is arranged on the side of the suction hole 14 close to the sliding groove 15, and a second heat insulation groove 132 is arranged on the side of the suction hole 14 far from the sliding groove 15. Heat insulation members 2 are arranged in both the first heat insulation groove 131 and the second heat insulation groove 132; heat transfer from the cylinder block 11 of the cylinder 1 to the suction hole 14 is further reduced from both sides of the suction hole 14, thereby reducing the suction heat and the loss of suction volume, improving the suction coefficient and the volumetric efficiency, and ensuring the operation energy efficiency of the pump body assembly.

[0067] The position and size of the heat insulation groove 13 will be further described below in conjunction with the specific structure of the cylinder 1; the cylinder 1 includes a cylinder block 11 and an extension part 12; the cylinder block 11 encloses a cylinder cavity 111, and the side wall of the cylinder block 11 includes an intake end side wall 114; the intake end side wall 114 extends outwards in a direction away from the axis of the cylinder block 11 to form the extension part 12; specifically, the cylinder block 11 is annular, a cylinder cavity 111 is formed inside the radial direction of the cylinder block 11, and the intake end side wall 114 extends radially outwards along the cylinder block 11 to form the extension part 12; the extension part 12 is arc-shaped, and the extension part 12 and the cylinder block 11 are coaxially arranged;

[0068] An intake hole 14 and a chute 15 are formed between the extension part 12 and the intake end side wall 114. The intake hole 14 penetrates through the extension part 12 and the intake end side wall 114, and the intake hole 14 communicates the inside and the outside of the cylinder cavity 111; one end of the chute 15 extends to the cylinder cavity 111 and communicates with the cylinder cavity 111;

[0069] Preferably, the hole depth direction of the intake hole 14 and the groove depth direction of the chute 15 are respectively collinear with two different radial directions of the cylinder block 11; to maximize the size of the heat insulation groove 13 in the radial direction of the cylinder block 11 and provide a heat insulation effect;

[0070] Making full use of the space outside the intake hole 14, the extension part 12 forms a first heat insulation groove 131 and a second heat insulation groove 132 outside the intake hole 14. While achieving a heat insulation effect, it reduces the impact of the heat insulation groove 13 on the strength of the extension part 12; along the circumferential direction of the cylinder block 11, the second heat insulation groove 132, the intake hole 14, the first heat insulation groove 131, and the chute 15 are arranged in sequence, and there is no communication between adjacent ones of the second heat insulation groove 132, the intake hole 14, the first heat insulation groove 131, and the chute 15;

[0071] Specifically, one end of the first heat insulation groove 131 extends to and opens at the outer peripheral wall of the extension part 12, and the heat insulation part 2 corresponding to the first heat insulation groove 131 can be inserted into the first heat insulation groove 131 through this open end; the other end of the first heat insulation groove 131 extends to the intake end side wall 114, and the first heat insulation groove 131 does not communicate with the cylinder cavity 111; one end of the second heat insulation groove 132 extends to and opens at the outer peripheral wall of the extension part 12, and the heat insulation part 2 corresponding to the second heat insulation groove 132 can be inserted into the second heat insulation groove 132 through this open end; the other end of the second heat insulation groove 132 extends to the intake end side wall 114, and the second heat insulation groove does not communicate with the cylinder cavity 111; preferably, the first heat insulation groove 131 and the second heat insulation groove 132 extend along different radial directions of the cylinder block 11;

[0072] The outer extension part 12 includes a first outer extension side wall 121 and a second outer extension side wall 122 which are oppositely arranged in the circumferential direction of the cylinder block 11. The outer peripheral wall of the outer extension part 12 connects the first outer extension side wall 121 and the second outer extension side wall 122. The first outer extension side wall 121 is away from the second heat insulation groove 132, and the second outer extension side wall 122 is close to the second heat insulation groove 132. That is, along the circumferential direction of the cylinder block 11, the second outer extension side wall 122, the second heat insulation groove 132, the air intake hole 14, the first heat insulation groove 131, the sliding groove 15, and the first outer extension side wall 121 are arranged at intervals in sequence.

[0073] Further, the minimum distance between the side wall of the first heat insulation groove 131 and the hole wall of the air intake hole 14 is d 11 , and the minimum distance between the side wall of the first heat insulation groove 131 and the side wall of the sliding groove 15 is d 12 ; d 11 and d 12 satisfy: d 11 ≥1.5 mm, d 12 ≥1.5 mm; Make full use of the space between the air intake hole 14 and the sliding groove 15, and at the same time ensure a safety distance between the first heat insulation groove 131 and the air intake hole 14 and the sliding groove 15, to avoid problems such as deformation of the air intake hole 14 and the sliding groove 15 and reduction of the strength of the outer extension part 12 caused by inappropriate size of the first heat insulation groove 131;

[0074] Preferably, d 11 ≥1 mm, d 12 ≥1 mm;

[0075] The minimum distance between the side wall of the second heat insulation groove 132 and the hole wall of the air intake hole 14 is d 21 , and the minimum distance between the side wall of the second heat insulation groove 132 and the second outer extension side wall 122 is d 22 ; d 21 and d 22 satisfy: d 21 ≥2.5 mm, d 22 ≥2.5 mm; Make full use of the space between the air intake hole 14 and the second outer extension side wall 122, and at the same time ensure a safety distance between the second heat insulation groove 132 and the air intake hole 14 and the second outer extension side wall 122, to avoid problems such as deformation of the air intake hole 14 and the second outer extension side wall 122 and reduction of the strength of the outer extension part 12 caused by inappropriate size of the second heat insulation groove 132;

[0076] Preferably, d 21 ≥2 mm, d 22 ≥2 mm;

[0077] The distance between the bottom wall of the second heat insulation groove 132 near the side wall 114 of the suction end and the outer peripheral surface of the side wall 114 of the suction end is s, and s satisfies: s > 0 mm; the influence of the second heat insulation groove 132 and the heat insulation member 2 provided in the second heat insulation groove 132 on the end face sealing performance of the cylinder 1 is reduced, and the influence of the second heat insulation groove 132 on the adjacent mounting holes is reduced; it is designed that the maximum depth of the second heat insulation groove 132 along the radial direction of the cylinder block 11 cannot reach the outer peripheral surface of the side wall 114 of the suction end.

[0078] The dimensional relationship between the heat insulation groove 13 and the heat insulation member 2 affects the heat insulation effect of the heat insulation member 2. The following further explains the dimensional relationship between the heat insulation groove 13 and the heat insulation member 2; both the first heat insulation groove 131 and the second heat insulation groove 132 communicate with the two end faces in the axial direction of the cylinder 1; on the one hand, the volume of the heat insulation groove 13 and the heat insulation member 2 can be maximally increased, and then the heat insulation effect of the heat insulation member 2 can be maximally increased, effectively reducing the heat transfer from the cylinder block 11 to the suction hole 14, thereby reducing the suction heat and the suction heat loss, improving the volumetric efficiency, and ensuring the operation energy efficiency of the pump body assembly. On the other hand, it is convenient to machine the heat insulation groove 13.

[0079] Preferably, both the heat insulation member 2 and the heat insulation groove 13 are of cuboid structure, which is convenient for machining, especially wire cutting machining; the length direction of the heat insulation member 2 and the length direction of the heat insulation groove 13 are both parallel to the radial direction of the cylinder 1, and the height direction of the heat insulation member 2 and the height direction of the heat insulation groove 13 are both parallel to the axial direction of the cylinder 1;

[0080] The length of the heat insulation member 2 is E, the width of the heat insulation member 2 is F, and the height of the heat insulation member 2 is G; the length of the heat insulation groove 13 is e, the width of the heat insulation groove 13 is f, and the height of the heat insulation groove 13 is g; E, F, G, e, f, and g satisfy: E ≤ e, F < f, G = g;

[0081] Specifically, first of all, to ensure that the heat insulation member 2 plays a role in completely blocking heat in the axial direction of the cylinder block 11, the height of the heat insulation member 2 should be the same as the height of the heat insulation groove 13, that is, G = g;

[0082] Secondly, since the heat insulation member 2 needs to be arranged in the heat insulation groove 13, if the heat insulation member 2 and the heat insulation groove 13 are in interference fit, deformation will occur in the parts of the extension part 12 on both sides of the heat insulation groove 13 during the process of inserting the heat insulation member 2, thereby affecting the cooperation between the suction hole 14 and the sliding groove 15 and between the cylinder 1 and the housing 41 in the pump body assembly; therefore, preferably, the heat insulation member 2 and the heat insulation groove 13 should be in clearance fit, that is, F < f, and then the heat insulation member 2 and the heat insulation groove 13 are fixedly connected by using AB glue or the like;

[0083] In addition, since the heat insulation groove 13 is not communicated with the cylinder cavity 111 (the extension line of the heat insulation groove 13 does not intersect the inner circle of the cylinder 1), when the length of the heat insulation member 2 is greater than the minimum length of the heat insulation groove 13, the outer edge of the heat insulation member 2 will exceed the outer contour of the cylinder 1; during the assembly process of the pump body assembly, since the original gap between the cylinder 1 and the housing 41 is very small, it may cause interference between the heat insulation member 2 and the housing 41, affecting the normal assembly; therefore, it should be ensured that E≤e to avoid interference between the heat insulation member 2 and the housing 41.

[0084] Preferably, the heat insulation member 2 is a heat insulation sheet; the heat insulation member 2 includes a first heat insulation member 21 and a second heat insulation member 22. The first heat insulation member 21 is arranged in the first heat insulation groove 131, and the second heat insulation member 22 is arranged in the second heat insulation groove 132; most of the heat of the high-temperature cylinder block 11 is blocked from being transferred to the suction hole 14 through the first heat insulation member 21 and the second heat insulation member 22, preventing the heat of the high-temperature cylinder block 11 from heating the gas flowing through the suction hole 14, reducing the loss of the suction volume, and effectively ensuring the refrigeration capacity and operation energy efficiency of the pump body assembly.

[0085] In addition, the heat insulation member 2 can be designed to include a metal base layer (Al-Si alloy), a transition layer (Al2O3 / SiC nanofibers), and a surface layer (SiO2 aerogel) arranged in sequence from the inside to the outside; the overall thermal conductivity <0.05W / (m·K), and the compressive strength >15MPa.

[0086] Embodiment 2

[0087] As Figure 6 shown, different from Embodiment 1, when the thickness of the cylinder 1 is sufficient and the diameter of the suction hole 14 is not large, the heat insulation groove 13 is designed as an annular groove, and the annular groove is arranged outside the suction hole 14;

[0088] The heat insulation member 2 is an annular structure; or, there are multiple heat insulation members 2, and the multiple heat insulation members 2 can be spliced into an annular structure; the heat insulation member 2 is arranged around the outer peripheral side of the suction hole 14, expanding the heat insulation range and maximizing the heat insulation effect.

[0089] Preferably, the heat insulation groove 13 is a circular ring groove, and the circular ring groove and the suction hole 14 are coaxially arranged; the heat insulation member 2 is a circular ring structure.

[0090] Embodiment 3

[0091] Different from Embodiment 1 and 2, the surface of the heat insulation groove 13 and / or the surface of the heat insulation member 2 or the hole wall of the suction hole 14 is coated with a ceramic heat insulation material;

[0092] Furthermore, the ceramic thermal insulation material includes at least one of alumina, zirconia, silicon nitride, silicon carbide, mullite, silica aerogel, and boron nitride; the characteristics of alumina include high temperature resistance (~1800 °C), high mechanical strength, and low cost. The thermal conductivity of alumina is relatively high, and the thermal insulation performance can be optimized by combining with a porous structure; the characteristics of zirconia include low thermal conductivity (about 2 W / m·K), high temperature resistance (~2400 °C), and good thermal shock resistance. The characteristics of silicon carbide include high high-temperature strength (~1600 °C) and oxidation resistance. The characteristics of mullite include low thermal expansion coefficient, strong thermal shock resistance, and corrosion resistance. The characteristics of silica aerogel include extremely low thermal conductivity (~0.015 W / m·K) and light weight. The characteristics of boron nitride include good lubricity, high temperature resistance (~900 °C), and low thermal conductivity.

[0093] Example 4

[0094] As Figure 7 shown, this embodiment proposes a rotary fluid device, and the rotary fluid device is a rotary expander, a sliding vane 32 expander, or a rotary compressor, and the rotary fluid device includes the pump body assembly described in any one of Embodiments 1 to 3.

[0095] Furthermore, when the rotary fluid device is a rolling piston compressor, the rolling piston compressor further includes a housing 41; the housing 41 forms an installation cavity, and the pump body assembly is arranged in the installation cavity; the pump body assembly further includes an upper flange 33, a lower flange 34, and a crankshaft 35. The upper flange 33, the cylinder 1, and the lower flange 34 are arranged in sequence from top to bottom; the upper flange 33 forms an upper flange hole, and the lower flange 34 forms a lower flange hole; the crankshaft 35 includes a long shaft 351, an eccentric shaft 352, and a short shaft 353 arranged in sequence from top to bottom. The long shaft 351 is rotatably fitted with the upper flange hole, the eccentric shaft 352 is drivingly connected with the roller 31, and the short shaft 353 is rotatably fitted with the lower flange hole;

[0096] When the crankshaft 35 is controlled to rotate, the eccentric shaft 352 can drive the roller 31 to rotate; under the action of the roller 31 and the elastic member, the sliding vane 32 abuts against the roller 31 and reciprocates in the sliding groove 15, so that the volumes of the suction cavity 112 and the discharge cavity 113 change accordingly, thereby realizing periodic suction and discharge.

[0097] Furthermore, the rolling piston compressor further includes a motor 42, and the motor 42 is arranged in the installation cavity and above the pump body assembly; the motor 42 includes a rotor and a stator, and the rotor is drivingly connected with the long shaft 351;

[0098] The stator includes a stator core and a stator winding. The stator core is arranged on the side wall of the installation cavity, and the stator winding is wound around the stator core; the rotor is rotatably arranged in the installation cavity and includes a rotor core; when the stator winding is energized with alternating current, the rotor can be rotated.

[0099] The rolling rotor compressor further includes an upper cover 43 and a lower cover 44. The upper cover 43 is arranged at the upper end in the axial direction of the housing 41, and the lower cover 44 is arranged at the lower end in the axial direction of the housing 41. The upper cover 43, the housing 41 and the lower cover 44 enclose a closed installation cavity. A base 45 is arranged at the lower end of the housing 41, and the rolling rotor compressor is fixedly arranged through the base 45. An exhaust pipe 48 is arranged on the upper cover 43, and the exhaust pipe 48 communicates with the installation cavity.

[0100] A gas-liquid separator 46 is arranged on one side of the rolling rotor compressor. The gas-liquid separator 46 forms a gas-liquid separator outlet. The suction port and the gas-liquid separator outlet are communicated through a suction pipe 47, and the exhaust port communicates with the installation cavity.

[0101] When the cylinder 1 sucks air, the gas in the gas-liquid separator 46 enters the cylinder 1 through the suction pipe 47. The gas in the exhaust cavity 113 is discharged to the installation cavity and then discharged through the exhaust pipe 48.

[0102] The exemplary embodiments of the present disclosure have been specifically illustrated and described above. It should be understood that the present disclosure is not limited to the detailed structures, setting manners or implementation methods described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent settings included within the spirit and scope of the appended claims.

Claims

1. A pump body assembly, characterized in that, It includes a cylinder (1); a cylinder cavity (111) is formed inside the cylinder (1), and an air inlet hole (14) communicating with the cylinder cavity (111) is formed on the side wall of the cylinder (1); An insulation groove (13) is further formed on the side wall of the cylinder (1) outside the air inlet hole (14), and an insulation member (2) is arranged in the insulation groove (13); The insulation member (2) is made of a ceramic insulation material; or, The surface of the insulation groove (13) and / or the surface of the insulation member (2) is coated with a ceramic insulation material.

2. The pump body assembly according to claim 1, characterized in that, The ceramic insulation material includes at least one of alumina, zirconia, silicon nitride, silicon carbide, mullite, and silica aerogel.

3. The pump body assembly according to claim 1 or 2, characterized in that, The thermal conductivity of the ceramic insulation material is k, and the specific heat capacity of the ceramic insulation material is C; The k and C satisfy: k≤52W / (m·K), C≥450J / (g·℃).

4. The pump body assembly according to claim 1, characterized in that, A rotatable roller (31) is arranged in the cylinder cavity (111); a sliding groove (15) is further formed on the side wall of the cylinder (1), and a slidable sliding piece (32) is arranged in the sliding groove (15); one end of the sliding piece (32) is connected in the sliding groove (15), and the other end abuts against the roller (31); the sliding piece (32) divides the space between the outer peripheral wall of the roller (31) and the inner peripheral wall of the cylinder cavity (111) into an air suction cavity (112) and an exhaust cavity (113); The air inlet hole (14) communicates with the air suction cavity (112), and the air inlet hole (14) is arranged close to the sliding groove (15); The insulation groove (13) includes a first insulation groove (131); the first insulation groove (131) is formed between the air inlet hole (14) and the sliding groove (15).

5. The pump body assembly according to claim 4, characterized in that, The insulation groove (13) further includes a second insulation groove (132) arranged opposite to the first insulation groove (131); the second insulation groove (132) is formed on the side of the air inlet hole (14) away from the sliding groove (15).

6. The pump body assembly according to claim 5, wherein, The cylinder (1) includes a cylinder block (11); the cylinder block (11) encloses the cylinder cavity (111), and the side wall of the cylinder block (11) includes an air suction end side wall (114); the air suction end side wall (114) extends outwards along the direction away from the axis of the cylinder block (11) to form an extension part (12); The extension part (12) and the air suction end side wall (114) are formed with the air inlet hole (14) and the sliding groove (15); The extension part (12) is formed with the first insulation groove (131) and the second insulation groove (132); along the circumferential direction of the cylinder block (11), the second insulation groove (132), the air inlet hole (14), the first insulation groove (131), and the sliding groove (15) are arranged in sequence; The extension part (12) includes a first extension side wall (121) and a second extension side wall (122) arranged opposite to each other in the circumferential direction of the cylinder block (11), the first extension side wall (121) is away from the second insulation groove (132), and the second extension side wall (122) is close to the second insulation groove (132).

7. The pump body assembly according to claim 6, characterized in that, The minimum distance between the side wall of the first heat insulation groove (131) and the hole wall of the air suction hole (14) is d 11 , and the minimum distance between the side wall of the first heat insulation groove (131) and the side wall of the sliding groove (15) is d 12 ; the d 11 and d 12 satisfy: d 11 ≥ 1.5 mm, d 12 ≥ 1.5 mm; The minimum distance between the side wall of the second heat insulation groove (132) and the pore wall of the air suction hole (14) is d 21 The minimum distance between the side wall of the second heat insulation groove (132) and the second epitaxial side wall (122) is d 22 ; The d 21 and d 22 satisfy: d 21 ≥2.5mm, d 22 ≥2.5mm.

8. The pump body assembly according to claim 7, characterized in that, The distance between the bottom wall of the second heat insulation groove (132) close to the side wall of the suction end (114) and the outer peripheral surface of the side wall of the suction end (114) is s, and s satisfies: s > 0 mm.

9. The pump body assembly according to claim 2, characterized in that, Both the first heat insulation groove (131) and the second heat insulation groove (132) communicate with both end faces of the cylinder (1) in the axial direction.

10. The pump body assembly according to claim 9, characterized in that, Both the heat insulation member (2) and the heat insulation groove (13) are in a cuboid structure; the length direction of the heat insulation member (2) and the length direction of the heat insulation groove (13) are both parallel to the radial direction of the cylinder (1), and the height direction of the heat insulation member (2) and the height direction of the heat insulation groove (13) are both parallel to the axial direction of the cylinder (1); The length of the heat insulation member (2) is E, the width of the heat insulation member (2) is F, and the height of the heat insulation member (2) is G; the length of the heat insulation groove (13) is e, the width of the heat insulation groove (13) is f, and the height of the heat insulation groove (13) is g; E, F, G, e, f, and g satisfy: E ≤ e, F < f, G = g.

11. The pump body assembly according to claim 2, wherein, The heat insulation groove (13) is an annular groove, and the annular groove is arranged outside the suction hole (14); The heat insulation member (2) is in an annular structure; or, there are multiple heat insulation members (2), and the multiple heat insulation members (2) can be spliced into an annular structure.

12. The pump body assembly according to claim 11, wherein The heat insulation groove (13) is a circular ring groove, and the circular ring groove and the suction hole (14) are coaxially arranged; the heat insulation member (2) is in a circular ring structure.

13. A rotary fluid device, characterized in that, The rotary fluid device is a rotary expander or a sliding vane expander or a rotary compressor, and the rotary fluid device includes the pump body assembly according to any one of claims 1 to 12.

14. The rotary fluid device according to claim 13, characterized in that, When the rotary fluid device is a rolling rotor compressor, the rolling rotor compressor further includes a housing (41); the housing (41) forms an installation cavity, and the pump body assembly is arranged in the installation cavity; the pump body assembly further includes an upper flange (33), a lower flange (34), and a crankshaft (35), and the upper flange (33), the cylinder (1), and the lower flange (34) are arranged in sequence from top to bottom; the upper flange (33) forms an upper flange hole, and the lower flange (34) forms a lower flange hole; the crankshaft (35) includes a long shaft (351), an eccentric shaft (352), and a short shaft (353) arranged in sequence from top to bottom, the long shaft (351) is rotatably matched with the upper flange hole, the eccentric shaft (352) is drivingly connected with the roller (31), and the short shaft (353) is rotatably matched with the lower flange hole; When the crankshaft (35) is controlled to rotate, the eccentric shaft (352) can drive the roller (31) to rotate.

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