Gas conveying equipment with outer rotor driven by inner rotor

Abstract

The utility model belongs to the technical field of gas conveying equipment, and particularly relates to gas conveying equipment with an inner rotor driving an outer rotor. In order to overcome the defects of an air inlet or exhaust structure of an existing air conveying device with a sliding piece and a rotary cylinder rotationally connected, the technical scheme is that the air conveying device with the inner rotor driving the outer rotor comprises a base, an inner rotor and an outer rotor, the air inlet end cover is provided with an air inlet and an air inlet ring groove which are communicated with each other; the air outlet end cover is provided with an air outlet and an air outlet ring groove which are communicated; the inner rotor comprises a rotating shaft and a rotor body, and a sliding groove is formed in the rotor body; a slip sheet; the outer rotor is provided with an axially through accommodating cavity and is provided with an air inlet groove and an air outlet groove; the inner rotor is eccentrically and tangentially arranged in the accommodating cavity of the outer rotor; the outer ends of the sliding sheets are rotationally connected to the outer rotor, and the inner ends are arranged in the sliding grooves; the air inlet ring groove is communicated with the containing cavity, and the air outlet ring groove is communicated with the containing cavity. The continuous exhaust device has the beneficial effect of realizing continuous exhaust.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas conveying equipment, specifically relating to a gas conveying equipment in which an inner rotor drives an outer rotor. Background Technology

[0002] Gas conveying equipment, such as a vane compressor, mainly consists of three parts: the body (also known as the cylinder), the rotor, and the vanes. The rotor of a vane compressor is eccentrically positioned within the cylinder. Several longitudinal grooves are formed on the rotor, and vanes that can slide freely radially are installed within these grooves. Due to the eccentric positioning of the rotor within the cylinder, a crescent-shaped space is formed between the inner wall of the cylinder and the outer surface of the rotor. When the rotor rotates, the vanes are thrown out of the grooves by centrifugal force, their ends adhering tightly to the inner cylindrical wall of the compressor. The crescent-shaped space is divided by the vanes into several fan-shaped chambers—basic volumes. Within one rotation of the rotor, each basic volume gradually increases from its minimum value to its maximum value, and then gradually decreases from its maximum value back to its minimum value. As the rotor rotates continuously, the basic volumes follow this cyclical pattern.

[0003] The main drawback of traditional vane compressors is the significant mechanical friction between the vanes and the rotor / cylinder, resulting in substantial wear and energy loss, especially at high speeds. Conversely, at very low speeds, the vanes are difficult to eject or adhere to the cylinder, causing the compressor to malfunction.

[0004] To reduce friction between the vane and the cylinder, Pan Shulin et al. proposed a novel vane compressor structure in their paper "Structural Analysis of Rotary Cylinder Hinged Vane Compressor". This compressor adds a rotary cylinder to the main cylinder and hinges the outer end of the vane to the rotary cylinder. The rotary cylinder is driven by the vane (the inner end of the vane remains in the vane slot of the rotor). In addition to the hinge slot, the rotary cylinder has intake and exhaust vents. The exhaust-side cylinder cover has an arc-shaped exhaust groove with multiple exhaust holes. The intake-side cylinder cover has an annular intake groove with intake holes on its outer periphery.

[0005] However, the aforementioned solutions have the following shortcomings: 1. The exhaust side cylinder head has an arc-shaped exhaust groove, and exhaust only occurs when the exhaust port of the rotary cylinder communicates with the arc-shaped exhaust groove. In some gas-liquid mixing compression applications, this can easily lead to cylinder explosion; 2. Both cylinder heads are T-shaped, which is not a completely reasonable structure; 3. The exhaust valve structure is not described; 4. The sealing structure between the rotary cylinder, rotor, and cylinder head is not described. Other existing technologies, such as CN101498306B-rotary compressors, also have relatively complex exhaust structures.

[0006] Meanwhile, the aforementioned shortcomings also appear in other gas delivery equipment such as vacuum pumps. Summary of the Invention

[0007] This invention addresses the shortcomings of existing gas conveying equipment with rotating vanes and cylinders, providing a gas conveying device with an inner rotor driving an outer rotor, improving its intake and exhaust structure, and enabling the gas conveying device to be applied to more occasions such as gas-liquid mixing and / or higher compression ratios.

[0008] To achieve the above objectives, this utility model adopts the following technical solution: a gas conveying device with an inner rotor driving an outer rotor, the gas conveying device with an inner rotor driving an outer rotor comprising:

[0009] Base;

[0010] The air intake end cap is fixed to the base;

[0011] The exhaust cap is fixed to the base;

[0012] The inner rotor, located between the air inlet end cover and the air outlet end cover, has a sliding groove.

[0013] slider;

[0014] The outer rotor has an axially through-hole receiving cavity;

[0015] The inner rotor is eccentrically and tangentially positioned within the receiving cavity of the outer rotor.

[0016] The outer end of the slide is oscillatingly connected to the outer rotor, and the inner end of the slide is slidably connected to the slide groove.

[0017] An air intake channel is formed between the air intake end cover and the outer rotor, which is connected to the receiving cavity;

[0018] Among them, an air outlet channel is formed between the air outlet end cover and the outer rotor, which is connected to the receiving cavity. The air outlet channel includes an air outlet groove and an air outlet ring groove that are connected to each other.

[0019] This utility model discloses a gas conveying device with an inner rotor driving an outer rotor. It features an outer rotor, with the outer end of a vane oscillatingly connected to it. The inner end of the vane is slidably connected to a groove in the inner rotor. Compared to conventional vane compressors without an outer rotor, the sealing between the vane and the outer rotor is improved, allowing for normal operation even at very low speeds with minimal leakage. Compared to conventional vane compressors without an outer rotor, the relative movement between the vane and the outer rotor is minimal, resulting in low frictional loss. Compared to the rotary cylinder-connected vane compressors in the prior art, the cylinder body is eliminated. Furthermore, an annular exhaust groove is formed between the outlet end cover and the outer rotor, ensuring continuous exhaust during rotation as the intake cavity and the outlet of the exhaust end cover remain connected. The projections of the inlet and outlet grooves on the radial plane are staggered. Gas conveying equipment is divided into three categories: (1) conveying gas from point A to point B without changing the initial and final pressure of the gas (such as a blower); (2) used to increase gas pressure (such as a compressor); and (3) used to reduce gas (or vapor) pressure (such as a vacuum pump). In the gas conveying equipment of this utility model, the pressure change during the conveying process is mainly due to the compressor or vacuum pump.

[0020] As an improvement, the gas delivery equipment can be a compressor or a vacuum pump.

[0021] As an improvement, the exhaust groove is formed on the outer rotor, and the exhaust ring groove is formed on the exhaust end cover. The exhaust end cover is also provided with an exhaust port that communicates with the exhaust ring groove. In other designs, the exhaust ring groove can also be formed on the outer rotor.

[0022] As an improvement, the vent groove is located radially outside the receiving cavity, and an exhaust valve is provided in the vent groove.

[0023] As an improvement, the end face of the air outlet groove facing the air outlet end cover is open, the exhaust valve includes a valve core and a spring element, the air outlet groove has a constricted section, the valve core has a constricted portion that cooperates with the constricted section, and the spring element generates a force on the valve core to move toward the constricted section.

[0024] As an improvement, an axial air outlet hole is opened on the air outlet end cover to connect the air outlet ring groove and the air outlet. The air outlet has an exhaust chamber and an exhaust valve is provided on the air outlet.

[0025] As an improvement, the exhaust valve is threaded to the exhaust port; and / or,

[0026] The exhaust valve includes a valve seat with an exhaust port, a first positioning post extending axially from the valve seat, a spring member sleeved on the first positioning post, and a valve core. The valve core seals the exhaust port under the action of the spring member, and a second positioning post is formed on the valve core for mounting the spring member. The outer end of the exhaust port is chamfered, and the valve core has a frustum portion that matches the chamfer of the exhaust port.

[0027] As an improvement, the intake end cover has a connected intake port and an intake ring groove, and the outer rotor has an intake groove connecting the intake ring groove and the receiving cavity. An intake valve is provided on the intake port. In other designs, the intake ring groove can also be formed on the outer rotor.

[0028] As an improvement, a first intake sealing ring and a second intake sealing ring are provided axially between the intake end cover and the outer rotor. The first intake sealing ring is located on the outer periphery of the intake groove, and the second intake sealing ring is located on the inner periphery of the intake groove and on the outer periphery of the receiving cavity; and / or,

[0029] A first vent sealing ring and a second vent sealing ring are provided axially between the vent end cover and the outer rotor. The first vent sealing ring is located on the outer periphery of the vent groove, and the second vent sealing ring is located on the inner periphery of the vent groove and on the outer periphery of the receiving cavity; and / or,

[0030] A third intake sealing ring is provided axially between the intake end cover and the inner rotor, located in the receiving cavity; and / or,

[0031] A third air outlet sealing ring is provided between the air outlet end cover and the inner rotor axially in the receiving cavity.

[0032] As an improvement, three sealing grooves are provided on the air intake end cover and three sealing grooves are provided on the air outlet end cover, with each sealing ring located in its respective sealing groove.

[0033] As an improvement, the inner rotor includes a shaft and a rotor body, with the intake end cover being concave and its opening facing the rotor body. The inner diameter of the intake end cover opening is adapted to the outer diameter of the outer rotor; and / or,

[0034] The exhaust end cap is concave and its opening faces the rotor body; the inner diameter of the exhaust end cap opening is adapted to the outer diameter of the outer rotor; and / or,

[0035] A bearing is provided between the rotating shaft and the intake end cover, and a bearing is provided between the rotating shaft and the exhaust end cover; and / or,

[0036] The inner rotor is fitted with a wear-resistant sleeve; and / or,

[0037] The air inlet end cap and the air outlet end cap are fixedly connected by an axial threaded connector.

[0038] The beneficial effects of the gas conveying device with an inner rotor driving an outer rotor of this utility model are as follows: With an outer rotor, the outer end of a vane is oscillatingly connected to the outer rotor, and the inner end of the vane is slidably connected to a groove in the inner rotor. Compared to conventional vane compressors (or vacuum pumps) without an outer rotor, the seal between the vane and the outer rotor is improved, allowing normal operation even at very low speeds with minimal leakage. Compared to conventional vane compressors (or vacuum pumps) without an outer rotor, the relative movement between the vane and the outer rotor is very small, and the frictional loss between them is also very low. Compared to the rotary cylinder connecting the vane compressor (or vacuum pump) in the prior art, the cylinder body can be eliminated. Furthermore, an annular exhaust groove is formed between the exhaust end cover and the outer rotor, ensuring that the exhaust port of the receiving cavity and the exhaust end cover are always connected during rotation, enabling continuous exhaust and effectively preventing cylinder explosion. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of a compressor with an inner rotor driving an outer rotor according to Embodiment 1 of this utility model.

[0040] Figure 2 This is a cross-sectional view of a compressor with an inner rotor driving an outer rotor according to Embodiment 1 of this utility model.

[0041] Figure 3 and Figure 4 This is an exploded view of the compressor with an inner rotor driving an outer rotor in Embodiment 1 of this utility model from different angles.

[0042] Figure 5 This is a schematic diagram of the air inlet cover of a compressor with an inner rotor driving an outer rotor, according to Embodiment 1 of this utility model.

[0043] Figure 6 This is a schematic diagram of the air outlet cover of a compressor with an inner rotor driving an outer rotor, according to Embodiment 1 of this utility model.

[0044] Figure 7 This is a schematic diagram of the outer rotor of a compressor in Embodiment 1 of this utility model, where the inner rotor drives the outer rotor.

[0045] Figure 8 This is an exploded view of the compressor with an inner rotor driving an outer rotor according to Embodiment 2 of this utility model.

[0046] Figure 9 This is a schematic diagram of the assembly structure of the exhaust valve and the outer rotor of the inner rotor driving the outer rotor in Embodiment 2 of this utility model.

[0047] Figure 10 This is a schematic diagram of the structure of a vacuum pump with an inner rotor driving an outer rotor, according to Embodiment 3 of this utility model.

[0048] Figure 11This is a cross-sectional view of the vacuum pump with an inner rotor driving an outer rotor according to Embodiment 3 of this utility model.

[0049] Figure 12 This is an exploded view of the structure of the vacuum pump with an inner rotor driving an outer rotor according to Embodiment 3 of this utility model.

[0050] Figure 13 This is a schematic diagram of the hidden components of the vacuum pump with the inner rotor driving the outer rotor in Embodiment 3 of this utility model.

[0051] Figure 14 This is a schematic diagram of the air inlet cover of a vacuum pump with an inner rotor driving an outer rotor, according to Embodiment 3 of this utility model.

[0052] Figure 15 This is a schematic diagram of the outlet end cover of the vacuum pump with an inner rotor driving an outer rotor, according to Embodiment 3 of this utility model.

[0053] Figure 16 This is a schematic diagram of the outer rotor of the vacuum pump in Embodiment 3 of this utility model, where the inner rotor drives the outer rotor.

[0054] In the picture, 1. Base;

[0055] 2. Inlet end cap; 21. Inlet port; 22. Inlet ring groove; 23. Sealing groove; 24. Inlet hole;

[0056] 3. Vent end cap; 31. Vent outlet; 32. Vent ring groove; 33. Vent hole;

[0057] 4. Inner rotor; 41. Shaft; 42. Rotor body;

[0058] 5. Sliding plate;

[0059] 6. Outer rotor; 61. Inlet slot; 62. Outlet slot; 621. Narrowing section; 63. Swinging connection slot;

[0060] 7. Exhaust valve; 71. Valve seat; 72. Spring element; 73. Valve core;

[0061] 81. First intake sealing ring; 82. Second intake sealing ring; 83. Third intake sealing ring; 84. First exhaust sealing ring; 85. Second exhaust sealing ring; 86. Third exhaust sealing ring;

[0062] 9. Wear-resistant sleeve;

[0063] B. Bearings. Detailed Implementation

[0064] The technical solutions of the embodiments of the present invention will be explained and described below. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0065] See Figures 1 to 16 The gas conveying device of the present invention, wherein the inner rotor drives the outer rotor, includes:

[0066] Base;

[0067] The air intake end cap is fixed to the base;

[0068] The exhaust cap is fixed to the base;

[0069] The inner rotor, located between the air inlet end cover and the air outlet end cover, has a sliding groove.

[0070] slider;

[0071] The outer rotor has an axially through-hole receiving cavity;

[0072] The inner rotor is eccentrically and tangentially positioned within the receiving cavity of the outer rotor.

[0073] The outer end of the slide is oscillatingly connected to the outer rotor, and the inner end of the slide is slidably connected to the slide groove.

[0074] An air intake channel is formed between the air intake end cover and the outer rotor, which is connected to the receiving cavity;

[0075] Among them, an air outlet channel is formed between the air outlet end cover and the outer rotor, which is connected to the receiving cavity. The air outlet channel includes an air outlet groove and an air outlet ring groove that are connected to each other.

[0076] This utility model discloses a gas conveying device with an inner rotor driving an outer rotor. It includes an outer rotor, with the outer end of a vane oscillatingly connected to it. The inner end of the vane is slidably connected to a groove in the inner rotor. Compared to conventional vane compressors without an outer rotor, the sealing between the vane and the outer rotor is improved, allowing for normal operation even at very low speeds with minimal leakage. Compared to conventional vane compressors without an outer rotor, the relative movement between the vane and the outer rotor is very small, resulting in minimal frictional loss. Compared to the rotary cylinder-connected vane compressors in the prior art, the cylinder body is eliminated. Furthermore, an annular exhaust groove is formed between the outlet cover and the outer rotor, ensuring continuous exhaust during rotation by maintaining communication between the receiving cavity and the outlet of the exhaust cover, effectively preventing cylinder explosion.

[0077] Example 1

[0078] See Figures 1 to 7The compressor in Embodiment 1 of this utility model, in which the inner rotor 4 drives the outer rotor 6, includes:

[0079] Base 1;

[0080] The air intake end cap 2 is fixed on the base 1 and has a connected air intake port 21 and an air intake ring groove 22.

[0081] The air outlet cap 3 is fixed on the base 1 and has a connected air outlet 31 and an air outlet ring groove 32.

[0082] The inner rotor 4 is located between the air inlet end cover 2 and the air outlet end cover 3, and includes a rotating shaft 41 and a rotor body 42, with a sliding groove provided on the rotor body 42.

[0083] Slider 5;

[0084] The outer rotor 6 has an axially through receiving cavity, and also has an air inlet groove 61 and an air outlet groove 62 connected to the receiving cavity. The air inlet groove 61 and the air outlet groove 62 are located on the axial end face of the outer rotor 6. The radial outer end of the air inlet groove 61 is closed, and the radial outer end of the air outlet groove 62 is closed.

[0085] The inner rotor 4 is eccentrically and tangentially disposed in the receiving cavity of the outer rotor 6;

[0086] The outer end of the sliding vane 5 is oscillatingly connected to the outer rotor 6, and the inner end of the sliding vane 5 is slidably connected to the sliding groove.

[0087] The intake ring groove 22 is connected to the receiving cavity, and the exhaust ring groove 32 is connected to the receiving cavity.

[0088] In this embodiment, the projections of the air inlet groove 61 and the air outlet groove 62 on the radial plane are staggered.

[0089] In this embodiment, a swing connection groove is formed on the outer rotor 6, and the outer end of the slide plate 5 has an arc-shaped portion that mates with the swing connection groove. The slide plate 5 is axially inserted into the outer rotor 6 and the inner rotor 4. The circumferential dimension of the inner end of the swing connection groove of the outer rotor 6 is slightly larger than the circumferential dimension of the slide plate 5, so that the slide plate 5 can swing relative to the outer rotor 6.

[0090] In this embodiment, the inner rotor 4 has an outer circumferential wall, and the outer rotor 6 has an inner circumferential wall (the wall of the receiving cavity). The inner rotor 4 can only rotate, and the outer rotor 6 can only rotate. Therefore, the inner rotor 4 and the outer rotor 6 can always be internally tangent.

[0091] In this embodiment, an axial air outlet hole 33 is provided on the air outlet end cover 3, which connects the air outlet ring groove 32 and the air outlet 31. The air outlet 31 has an exhaust chamber and is equipped with an exhaust valve 7. In this embodiment, "axial" refers to the axial direction of the rotor.

[0092] In this embodiment, the exhaust valve 7 is threadedly connected to the air outlet 31, the air outlet 31 has external threads, and the exhaust valve 7 has internal threads.

[0093] In this embodiment, the exhaust valve 7 includes a valve seat 71 with an exhaust port 33, a first positioning post extending axially from the valve seat 71, a spring member 72 sleeved on the first positioning post, and a valve core 73. The valve core 73 seals the exhaust port 33 under the action of the spring member 72, and a second positioning post for mounting the spring member 72 is formed on the valve core 73. The valve seat 71 is generally H-shaped.

[0094] In this embodiment, the elastic element 72 is a compression spring; the outer end of the air outlet 33 is chamfered, and the valve core 73 has a frustum portion that matches the chamfer of the air outlet 33.

[0095] In this embodiment, a first intake sealing ring 81 and a second intake sealing ring 82 are provided axially between the intake end cover 2 and the outer rotor 6. The first intake sealing ring 81 is located on the outer periphery of the intake groove 61, and the second intake sealing ring 82 is located on the inner periphery of the intake groove 61 and on the outer periphery of the receiving cavity. The first intake sealing ring 81 and the second intake sealing ring 82 ensure that the gas can only flow into the receiving cavity (which can also be called the compression cavity) after passing through the intake port 21, the intake hole 24, the intake ring groove 22 and the intake groove 61.

[0096] A first air outlet sealing ring 84 and a second air outlet sealing ring 85 are provided axially between the air outlet end cover 3 and the outer rotor 6. The first air outlet sealing ring 84 is located on the outer periphery of the air outlet groove 62, and the second air outlet sealing ring 85 is located on the inner periphery of the air outlet groove 62 and on the outer periphery of the receiving cavity. The first air outlet sealing ring 84 and the second air outlet sealing ring 85 ensure that the compressed gas in the receiving cavity can only flow to the air outlet ring groove 32 through the air outlet groove 62.

[0097] A third air intake sealing ring 83 is provided axially between the air intake end cover 2 and the inner rotor 4, located in the accommodating cavity. The third air intake sealing ring 83 ensures that the gas in the accommodating cavity will not flow out from between the air intake end cover 2 and the outer rotor 6.

[0098] A third vent sealing ring 86 is provided axially between the vent end cover 3 and the inner rotor 4, located in the receiving cavity. The third vent sealing ring 86 ensures that the gas in the receiving cavity will not flow out from between the vent end cover 3 and the outer rotor 6.

[0099] In this embodiment, three sealing grooves 23 are provided on the air inlet end cover 2 and three sealing grooves 23 are provided on the air outlet end cover 3, and each sealing ring is located in each sealing groove 23.

[0100] In other embodiments, the sealing groove 23 may not be formed on the intake end cover 2 or the exhaust end cover, but rather on the inner rotor 4 and the outer rotor 6.

[0101] In this embodiment, the air inlet cover 2 is concave and the opening faces the rotor body 42, and the inner diameter of the opening of the air inlet cover 2 is adapted to the outer diameter of the outer rotor 6; the air outlet cover 3 is concave and the opening faces the rotor body 42, and the inner diameter of the opening of the air outlet cover 3 is adapted to the outer diameter of the outer rotor 6.

[0102] In this embodiment, a bearing B is provided between the rotating shaft 41 and the air inlet cover 2, and a bearing B is provided between the rotating shaft 41 and the air outlet cover 3.

[0103] In this embodiment, a wear-resistant sleeve 9 is fitted over the inner rotor 4. The wear-resistant sleeve 9 is made of PEEK (polyetheretherketone).

[0104] In this embodiment, all sealing rings are made of PTFE (polytetrafluoroethylene).

[0105] In other embodiments, the air inlet cap 2 and the air outlet cap 3 are fixedly connected by an axial threaded connector to ensure proper compression of the sealing ring.

[0106] In other embodiments, an intake valve may be provided on the intake port 21.

[0107] In other embodiments, multiple sliders 5 may also be provided.

[0108] In other embodiments, the slider 5 may also be at a certain angle to the radial direction.

[0109] In other embodiments, the axial length of the inlet end cap 2 and the outlet end cap 3 can be increased to completely enclose the outer rotor 6.

[0110] In this embodiment, the inner rotor 4 is the same as the rotor of a conventional vane compressor 5 without an outer rotor 6.

[0111] The working principle of the compressor with inner rotor 4 driving outer rotor 6 in Embodiment 1 of this utility model is as follows: Under the drive of a motor (not shown in the figure), inner rotor 4 rotates. During the rotation of inner rotor 4, outer rotor 6 is driven to rotate through sliding vane 5. Due to the eccentric arrangement of inner rotor 4 and outer rotor 6, the rotatable connection between sliding vane 5 and outer rotor 6 and radial sliding connection between sliding vane 5 and inner rotor 4, and the restriction of outer rotor 6 by inlet end cover 2 and outlet end cover 3 (outer rotor 6 rotatably engages with inlet end cover 2 and outlet end cover 3), relative motion is also generated between inner rotor 4 and outer rotor 6 during the rotation of inner rotor 4 driving outer rotor 6. This compresses the gas that enters the receiving cavity through inlet port 21, inlet hole 24, inlet ring groove 22, and inlet groove 61. The compressed gas is discharged through outlet groove 62, outlet ring groove 32, outlet hole 33, outlet port 31, and exhaust valve 7. The specific compression process of this type of compressor with outer rotor 6 can also be found in the prior patent CN101498306B - Rotary Compressor.

[0112] The beneficial effects of the compressor with inner rotor 4 driving outer rotor 6 in Embodiment 1 of this utility model are as follows: With outer rotor 6, the outer end of vane 5 is oscillatingly connected to outer rotor 6, and the inner end of vane 5 is slidably connected to a groove in the inner rotor 4. Compared to conventional vane 5 compressors without outer rotor 6, the sealing between vane 5 and outer rotor 6 is improved, allowing normal operation even at very low speeds with minimal leakage. Compared to conventional vane 5 compressors without outer rotor 6, the relative movement between vane 5 and outer rotor 6 is very small, and the frictional loss between vane 5 and outer rotor 6 is also very small. Compared to the rotary cylinder-connected vane 5 compressor in the prior art, the cylinder body can be eliminated. Furthermore, an annular exhaust ring groove is provided on the outlet end cover 3, ensuring continuous exhaust by keeping the accommodating cavity and the outlet 31 of the exhaust end cover in communication during rotation. An annular intake ring groove 22 is provided on the intake end cover 2, ensuring continuous intake by keeping the accommodating cavity and the intake 21 of the intake end cover 2 in communication during rotor rotation. The overall structure is compact and small in size.

[0113] Example 2

[0114] The main difference between Example 2 and Example 1 lies in the installation position of the exhaust valve 7.

[0115] See Figure 8 and Figure 9 In this embodiment, the exhaust valve 7 is disposed in the exhaust groove 62 of the outer rotor 6. The exhaust valve 7 includes a spring element 72 and a valve core 73. The outer end of the exhaust groove 62 is closed. The inner end of the exhaust groove 62 has a constricted section 621, the width of the inner end of the constricted section 621 being smaller than the width of its outer end. The valve core 73 of the exhaust valve 7 is in the shape of an isosceles trapezoidal block. The inner end of the exhaust groove 62 also has a flared section, which is located radially inside the constricted section 621, and the width of the inner end of the flared section is greater than the width of its outer end.

[0116] When the exhaust valve 7 is located on the outlet end cover 3, the outlet ring groove 32 is part of the compressor cavity. However, during actual compression, the outlet ring groove 32 does not completely cover this part of the cavity, which is considered a harmful space. In this embodiment, the exhaust valve 7 is located in the outlet groove 62 of the outer rotor 6. The outlet ring groove 32 is not part of the compressor cavity (it is isolated by the exhaust valve 7), which is equivalent to reducing the harmful space and improving the compression ratio and compression effect.

[0117] See Figures 10 to 16 The vacuum pump of this utility model, in which the inner rotor drives the outer rotor, includes:

[0118] Base;

[0119] The air intake end cap is fixed to the base;

[0120] The exhaust cap is fixed to the base;

[0121] The inner rotor, located between the air inlet end cover and the air outlet end cover, has a sliding groove.

[0122] slider;

[0123] The outer rotor has an axially through-hole receiving cavity;

[0124] The inner rotor is eccentrically and tangentially positioned within the receiving cavity of the outer rotor.

[0125] The outer end of the slide is oscillatingly connected to the outer rotor, and the inner end of the slide is slidably connected to the slide groove.

[0126] An air intake channel is formed between the air intake end cover and the outer rotor, which is connected to the receiving cavity;

[0127] Among them, an air outlet channel is formed between the air outlet end cover and the outer rotor, which is connected to the receiving cavity. The air outlet channel includes an air outlet groove and an air outlet ring groove that are connected to each other.

[0128] Example 3

[0129] See Figures 10 to 16 The vacuum pump in Embodiment 3 of this utility model, in which the inner rotor 4 drives the outer rotor 6, includes:

[0130] Base 1;

[0131] The air intake end cap 2 is fixed on the base 1 and has a connected air intake port 21 and an air intake ring groove 22.

[0132] The air outlet cap 3 is fixed on the base 1 and has a connected air outlet 31 and an air outlet ring groove 32.

[0133] The inner rotor 4 is located between the air inlet end cover 2 and the air outlet end cover 3, and includes a rotating shaft 41 and a rotor body 42, with a sliding groove provided on the rotor body 42.

[0134] Slider 5;

[0135] The outer rotor 6 has an axially through receiving cavity, and also has an air inlet groove 61 and an air outlet groove 62 connected to the receiving cavity. The air inlet groove 61 and the air outlet groove 62 are located on the axial end face of the outer rotor 6. The radial outer end of the air inlet groove 61 is closed, and the radial outer end of the air outlet groove 62 is closed.

[0136] The inner rotor 4 is eccentrically and tangentially disposed in the receiving cavity of the outer rotor 6;

[0137] The outer end of the sliding vane 5 is oscillatingly connected to the outer rotor 6, and the inner end of the sliding vane 5 is slidably connected to the sliding groove.

[0138] The intake ring groove 22 is connected to the receiving cavity, and the exhaust ring groove 32 is connected to the receiving cavity.

[0139] See Figure 13In this embodiment, the difference between the vacuum pump and the compressor in Embodiment 1 lies in the rotation direction of the inner rotor 4. The vacuum pump is configured according to... Figure 13 Rotating in the direction indicated by the middle arrow (counterclockwise) achieves vacuuming; the compressor presses... Figure 13 Compression is achieved by rotating in the opposite direction (clockwise) as indicated by the middle arrow. In other embodiments, the air inlet of the compressor in Embodiment 1 can also be used as the air outlet, and the air outlet can be used as the air inlet, so that the compressor becomes a vacuum pump. In this case, the rotation direction of the inner rotor of the compressor (vacuum pump) remains unchanged.

[0140] In this embodiment, the projections of the air inlet groove 61 and the air outlet groove 62 on the radial plane are staggered. The air inlet groove 61 and the air outlet groove 62 are close to the slider 5 and located on both sides of the slider 5.

[0141] In this embodiment, a swing connection groove is formed on the outer rotor 6, and the outer end of the slide plate 5 has an arc-shaped portion that mates with the swing connection groove. The slide plate 5 is axially inserted into the outer rotor 6 and the inner rotor 4. The circumferential dimension of the inner end of the swing connection groove of the outer rotor 6 is slightly larger than the circumferential dimension of the slide plate 5, so that the slide plate 5 can swing relative to the outer rotor 6.

[0142] In this embodiment, the inner rotor 4 has an outer circumferential wall, and the outer rotor 6 has an inner circumferential wall (the wall of the receiving cavity). The inner rotor 4 can only rotate, and the outer rotor 6 can only rotate. Therefore, the inner rotor 4 and the outer rotor 6 can always be internally tangent.

[0143] In this embodiment, an axial air outlet hole 33 is provided on the air outlet end cover 3, which connects the air outlet ring groove 32 and the air outlet 31. In this embodiment, "axial" refers to the axial direction of the rotor.

[0144] In this embodiment, a first intake sealing ring 81 and a second intake sealing ring 82 are provided axially between the intake end cover 2 and the outer rotor 6. The first intake sealing ring 81 is located on the outer periphery of the intake groove 61, and the second intake sealing ring 82 is located on the inner periphery of the intake groove 61 and on the outer periphery of the receiving cavity. The first intake sealing ring 81 and the second intake sealing ring 82 ensure that the gas can only flow into the receiving cavity (which can also be called the compression cavity) after passing through the intake port 21, the intake hole 24, the intake ring groove 22 and the intake groove 61.

[0145] A first air outlet sealing ring 84 and a second air outlet sealing ring 85 are provided axially between the air outlet end cover 3 and the outer rotor 6. The first air outlet sealing ring 84 is located on the outer periphery of the air outlet groove 62, and the second air outlet sealing ring 85 is located on the inner periphery of the air outlet groove 62 and on the outer periphery of the receiving cavity. The first air outlet sealing ring 84 and the second air outlet sealing ring 85 ensure that the compressed gas in the receiving cavity can only flow to the air outlet ring groove 32 through the air outlet groove 62.

[0146] A third air intake sealing ring 83 is provided axially between the air intake end cover 2 and the inner rotor 4, located in the accommodating cavity. The third air intake sealing ring 83 ensures that the gas in the accommodating cavity will not flow out from between the air intake end cover 2 and the outer rotor 6.

[0147] A third vent sealing ring 86 is provided axially between the vent end cover 3 and the inner rotor 4, located in the receiving cavity. The third vent sealing ring 86 ensures that the gas in the receiving cavity will not flow out from between the vent end cover 3 and the outer rotor 6.

[0148] In this embodiment, three sealing grooves 23 are provided on the air inlet end cover 2 and three sealing grooves 23 are provided on the air outlet end cover 3, and each sealing ring is located in each sealing groove 23.

[0149] In other embodiments, the sealing groove 23 may not be formed on the intake end cover 2 or the exhaust end cover, but rather on the inner rotor 4 and the outer rotor 6.

[0150] In this embodiment, the air inlet cover 2 is concave and the opening faces the rotor body 42, and the inner diameter of the opening of the air inlet cover 2 is adapted to the outer diameter of the outer rotor 6; the air outlet cover 3 is concave and the opening faces the rotor body 42, and the inner diameter of the opening of the air outlet cover 3 is adapted to the outer diameter of the outer rotor 6.

[0151] In this embodiment, a bearing B is provided between the rotating shaft 41 and the air inlet cover 2, and a bearing B is provided between the rotating shaft 41 and the air outlet cover 3.

[0152] In this embodiment, a wear-resistant sleeve 9 is fitted over the inner rotor 4. The wear-resistant sleeve 9 is made of PEEK (polyetheretherketone).

[0153] In this embodiment, all sealing rings are made of PTFE (polytetrafluoroethylene).

[0154] In other embodiments, the air inlet cap 2 and the air outlet cap 3 are fixedly connected by an axial threaded connector to ensure proper compression of the sealing ring.

[0155] In this embodiment, an intake valve is provided on the air inlet 21. The intake valve is not shown in the figure. In other embodiments, an outlet valve may be provided in the air outlet 31.

[0156] In other embodiments, multiple sliders 5 may also be provided.

[0157] In other embodiments, the slider 5 may also be at a certain angle to the radial direction.

[0158] In other embodiments, the axial length of the inlet end cap 2 and the outlet end cap 3 can be increased to completely enclose the outer rotor 6.

[0159] The beneficial effects of the vacuum pump driven by the inner rotor 4 and the outer rotor 6 in Embodiment 3 of this utility model are as follows: The outer rotor 6 is provided, and the outer end of the sliding vane 5 is oscillatingly connected to the outer rotor 6. The inner end of the sliding vane 5 is slidably connected to the sliding groove in the inner rotor 4, thus improving the seal between the sliding vane 5 and the outer rotor 6. It can operate normally even at very low speeds with minimal leakage. The relative movement between the sliding vane 5 and the outer rotor 6 is very small, and the frictional loss between them is also very low. A cylinder can be omitted. Furthermore, an annular exhaust ring groove is provided on the exhaust end cover 3, ensuring that the accommodating cavity and the exhaust end cover's exhaust port 31 remain connected during rotation, enabling continuous exhaust. An annular intake ring groove 22 is provided on the intake end cover 2, ensuring that the accommodating cavity and the intake port 21 of the intake end cover 2 remain connected during rotor rotation, enabling continuous intake. The overall structure is compact and small in size.

[0160] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the content described in the above specific embodiments. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A gas conveying device in which an inner rotor drives an outer rotor, characterized in that: Gas conveying equipment with an inner rotor driving an outer rotor includes: Base (1); The air intake end cap (2) is fixed on the base (1); The air outlet cap (3) is fixed on the base (1); The inner rotor (4) is located between the air inlet end cover (2) and the air outlet end cover (3), and has a sliding groove. slider (5); The outer rotor (6) has an axially penetrating receiving cavity; The inner rotor (4) is eccentrically and tangentially disposed in the receiving cavity of the outer rotor (6); Among them, the outer end of the slider (5) is oscillatingly connected to the outer rotor (6), and the inner end of the slider (5) is slidably connected to the groove; An air intake channel is formed between the air intake end cap (2) and the outer rotor (6) and is connected to the receiving cavity; Among them, an air outlet channel is formed between the air outlet end cap (3) and the outer rotor (6) and is connected to the receiving cavity. The air outlet channel includes an air outlet groove (62) and an air outlet ring groove (32) that are connected to each other.

2. The gas conveying device with an inner rotor driving an outer rotor according to claim 1, characterized in that: The gas delivery equipment is a compressor or a vacuum pump.

3. The gas conveying device with an inner rotor driving an outer rotor according to claim 1 or 2, characterized in that: An exhaust groove (62) is formed on the outer rotor (6), an exhaust ring groove (32) is formed on the exhaust end cover (3), and an exhaust port (31) connected to the exhaust ring groove (32) is also provided on the exhaust end cover (3).

4. The gas conveying device with an inner rotor driving an outer rotor according to claim 3, characterized in that: The vent groove (62) is located radially outside the receiving cavity. An exhaust valve (7) is provided in the vent groove (62). The end face of the vent groove (62) facing the vent end cover (3) is open. The exhaust valve (7) includes a valve core (73) and a spring element (72). The vent groove (62) has a constricted section (621). The valve core (73) has a constricted portion that cooperates with the constricted section (621). The spring element (72) generates a force on the valve core (73) to move toward the constricted section.

5. The gas conveying device with an inner rotor driving an outer rotor according to claim 3, characterized in that: An axial air outlet hole (33) is provided on the air outlet end cap (3) to connect the air outlet ring groove (32) and the air outlet (31). The air outlet (31) has an exhaust chamber and an exhaust valve (7) is provided on the air outlet (31).

6. The gas conveying device with an inner rotor driving an outer rotor according to claim 5, characterized in that: The exhaust valve (7) is threadedly connected to the air outlet (31); and / or, The exhaust valve (7) includes a valve seat (71) with an exhaust port (33), a first positioning post extending axially from the valve seat (71), a spring member (72) sleeved on the first positioning post, and a valve core (73). The valve core (73) seals the exhaust port (33) under the action of the spring member (72). A second positioning post for mounting the spring member (72) is formed on the valve core (73). The outer end of the exhaust port (33) is chamfered, and the valve core (73) has a frustum portion adapted to the chamfer of the exhaust port (33).

7. The gas conveying device with an inner rotor driving an outer rotor according to claim 1 or 2, characterized in that: The air inlet end cover (2) is provided with an air inlet (21) and an air inlet ring groove (22) that are connected together, and the outer rotor (6) is provided with an air inlet groove (61) that connects the air inlet ring groove (22) and the receiving cavity.

8. The gas conveying device with an inner rotor driving an outer rotor according to claim 7, characterized in that: A first intake sealing ring (81) and a second intake sealing ring (82) are provided axially between the intake end cover (2) and the outer rotor (6). The first intake sealing ring (81) is located on the outer periphery of the intake groove (61), and the second intake sealing ring (82) is located on the inner periphery of the intake groove (61) and on the outer periphery of the receiving cavity; and / or, A first vent sealing ring (84) and a second vent sealing ring (85) are provided axially between the vent end cover (3) and the outer rotor (6). The first vent sealing ring (84) is located on the outer periphery of the vent groove (62), and the second vent sealing ring (85) is located on the inner periphery of the vent groove (62) and on the outer periphery of the receiving cavity; and / or, A third intake sealing ring (83) is provided axially between the intake end cover (2) and the inner rotor (4) and located in the receiving cavity; and / or, A third air outlet sealing ring (86) is provided axially between the air outlet end cover (3) and the inner rotor (4) and located in the receiving cavity.

9. The gas conveying device with an inner rotor driving an outer rotor according to claim 8, characterized in that: Three sealing grooves (23) are provided on the air inlet end cover (2) and three sealing grooves (23) are provided on the air outlet end cover (3), with each sealing ring located in the respective sealing groove (23).

10. The gas conveying device with an inner rotor driving an outer rotor according to claim 1 or 2, characterized in that: The inner rotor (4) includes a shaft (41) and a rotor body (42). The intake end cover (2) is concave and its opening faces the rotor body (42). The inner diameter of the opening of the intake end cover (2) is adapted to the outer diameter of the outer rotor (6); and / or, The exhaust end cap (3) is concave and its opening faces the rotor body (42). The inner diameter of the opening of the exhaust end cap (3) is adapted to the outer diameter of the outer rotor (6); and / or, A bearing (B) is provided between the rotating shaft (41) and the air inlet end cover (2), and a bearing (B) is provided between the rotating shaft (41) and the air outlet end cover (3); and / or, The inner rotor (4) is fitted with a wear-resistant sleeve (9); and / or, The inlet end cap (2) and the outlet end cap (3) are fixedly connected by an axial threaded connector; and / or, The air inlet end cover (2) is provided with an air inlet (21) and an air inlet ring groove (22) that are connected together. The outer rotor (6) is provided with an air inlet groove (61) that connects the air inlet ring groove (22) and the receiving cavity. An air inlet valve is provided on the air inlet (21).

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