Pressure exchanger

Abstract

The utility model relates to a pressure exchanger which comprises a sleeve piece, a rotor and an end cover assembly, and an installation inner cavity is formed in the sleeve piece. The rotor is rotatably connected in the mounting inner cavity, overflowing channels are formed in the rotor, and the overflowing channels are parallel to the axis of the rotor; the end cover assembly comprises a first end cover and a second end cover, and the first end cover and the second end cover are located at the two ends of the sleeve piece correspondingly. Wherein the rotor and / or the end cover assembly are / is provided with a contact concave part, a concave surface is formed in the contact concave part, and the concave surface is in a circular arc shape; by means of the design of the contact concave parts, the capacity of keeping a relatively small gap between the rotor and the corresponding end cover assembly and / or the sleeve part can be achieved, the stability of the rotor in the rotating process is improved, contact and abrasion between components are prevented, and contact is reduced or even stopped to the maximum extent.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of seawater desalination, and particularly relates to a pressure exchanger. BACKGROUND

[0002] In recent years, with the rapid development of energy recovery technology and the continuous improvement of the efficiency of its device, the energy consumption of the produced water of the reverse osmosis seawater desalination system is greatly reduced, and the pressure exchanger, which is an energy recovery device, has become one of the necessary equipment of the reverse osmosis desalination system of seawater or brackish water.

[0003] High-pressure and low-pressure liquids exist in the pressure exchanger at the same time, the high-pressure liquid and the low-pressure liquid are isolated by the sealing surface between the rotor and the end cover, the pressure exchanger realizes the transmission of the pressure between the high-pressure liquid and the low-pressure liquid through the rotation of the rotor, and then realizes the purpose of pressure exchange.

[0004] In the actual working process, the static pressure bearing is formed between the rotor and the sleeve during the rotation of the rotor in the sleeve, and the rotor may deviate due to the uneven distribution of the liquid film between the rotor circumferential side, the sleeve and the end cover assembly during the high-speed rotation of the rotor, and there is a risk of collision between the end cover assembly and the inner wall of the sleeve. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a pressure exchanger and a water treatment system, so as to solve the problems that the rotor of the existing pressure exchanger deviates during rotation due to the uneven distribution of the oil film around the rotor, the stability of the rotor is poor during rotation, and the rotor collides with the end cover assembly or the sleeve.

[0006] In order to realize the above utility model purposes, the utility model adopts the following technical solutions:

[0007] The utility model provides a pressure exchanger, which comprises:

[0008] A sleeve is formed with an installation inner cavity in the sleeve;

[0009] A rotor is rotatably connected in the installation inner cavity, the rotor is formed with flow passages, and each flow passage is parallel to the axis of the rotor;

[0010] An end cover assembly comprises a first end cover and a second end cover, the first end cover and the second end cover are located at two ends of the sleeve respectively, the first end cover is formed with a first input passage and a first output passage, and the second end cover is formed with a second input passage and a second output passage;

[0011] Wherein, the rotor and / or the end cover assembly are provided with contact recesses, the contact recesses are formed with recessed surfaces, and the recessed surfaces are circular arcs.

[0012] In some embodiments of the application, along the axis of the rotor, two ends of the rotor are respectively formed with a first planar end face and a second planar end face, the first planar end face is in contact with a first inner end face on the first end cover, and the second planar end face is in contact with a second inner end face on the second end cover.

[0013] In some embodiments of the application, the contact recesses are arranged on the outer wall of the rotor and / or the first planar end face and / or the second planar end face.

[0014] In some embodiments of the application, the contact recesses are formed on the first inner end face and / or the second inner end face.

[0015] In some embodiments of the application, the maximum depth dimension h of each contact recess satisfies: h≤40μm;

[0016] The diameter d of each contact recess satisfies: d≤20mm.

[0017] In some embodiments of the application, each contact recess is arranged on the outer wall of the rotor in the form of an array distribution.

[0018] In some embodiments of the application, a communication structure is formed between the first end cover and the rotor, the communication structure is formed on the first inner end face or the first planar end face, and the communication structure is used to communicate adjacent the first input passage and the first output passage when the rotor rotates.

[0019] In some embodiments of the application, a communication structure is formed between the second end cover and the rotor, the communication structure is formed on the second inner end face or the second planar end face, and the communication structure is used to communicate adjacent the second input passage and the second output passage on the second end cover when the rotor rotates.

[0020] In some embodiments of the application, the communication structure is a first communication recess formed on the first inner end face, along the rotation direction of the rotor, the first communication recess is formed between the first input passage and the first output passage; along the radial direction of the first inner end face, the first communication recess includes at least one circular arc groove formed between the first input passage and the first output passage.

[0021] In some embodiments of the present application, the communication structure is a second communication recess formed on the second inner end face, and along the rotation direction of the rotor, the second communication recess is formed between the second output passage and the second input passage, and along the radial direction of the second inner end face, the second communication recess comprises a plurality of circular-arc grooves arranged at intervals.

[0022] In some embodiments of the present application, along the axis of the rotor, the depth of the circular-arc groove is less than 0.5mm.

[0023] Compared with the prior art, the pressure exchanger has the following advantages and positive effects:

[0024] The pressure exchanger relates to a contact recess formed on the planar end face of the rotor in contact with the end cover assembly and / or on the outer wall of the rotor, and the design of the contact recess can enable the rotor to maintain a relatively small gap between the corresponding end cover assembly and / or sleeve piece, thereby improving the stability of the rotor during rotation.

[0025] The recessed surface of the contact recess is in a circular-arc shape, which is convenient for processing and conducive to storing high-pressure liquid, and the design of the contact recess can enable the rotor to form a dynamic pressure increment when rotating relative to the end cover assembly and / or sleeve piece, thereby providing sufficient pressure and spacing to prevent contact and wear between the components and to minimize or even prevent contact.

[0026] Other features and advantages of the present application will become more apparent after reading the detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0028] Figure 1 is the overall structure diagram of the pressure exchanger proposed in the present application;

[0029] Figure 2 is Figure 1 the split diagram of the pressure exchanger in

[0030] Figure 3 is the structure diagram of the contact recess formed on the side wall of the rotor;

[0031] Figure 4 is the structure diagram of the contact recess formed on the planar end face of the rotor;

[0032] Figure 5is a fluid flow diagram of the pressure exchanger when the rotor is rotating;

[0033] Figure 6 is a partial cutaway view of the pressure exchanger;

[0034] Figure 7 is a cross-sectional view of the pressure exchanger;

[0035] Figure 8 is a first end cap configuration;

[0036] Figure 9 is a first end cap configuration;

[0037] Figure 10 is a first end cap configuration;

[0038] Figure 11 is a plan view of the communication structure formed on the planar end face of the rotor;

[0039] Figure 12 is a fluid flow path diagram of the water treatment system when the rotor is stationary;

[0040] Figure 13 is a fluid flow path diagram of the water treatment system when the rotor is rotating;

[0041] in the figure,

[0042] 10, water pump member;

[0043] 20, first water delivery line; 21, high pressure pump;

[0044] 30, reverse osmosis membrane group; 31, first drain line;

[0045] 40, circulation line; 41, booster pump;

[0046] 50, second water delivery line;

[0047] 60, pressure exchanger; 61, second drain line;

[0048] 100, sleeve member; 110, mounting inner cavity;

[0049] 200, first end cap; 201, first high pressure sealing surface; 202, first low pressure sealing surface; 210, first input passage; 220, first output passage; 230, first connection hole; 240, first communication recess;

[0050] 300, second end cap; 301, second high pressure sealing surface; 302, second low pressure sealing surface; 310, second input passage; 320, second output passage; 330, second connection hole; 340, second communication recess;

[0051] 400, rotor; 401, first planar end face; 402, second planar end face; 410, flow passage; 420, central hole; 430, third communication recess; 440, contact recess;

[0052] 500, tensioning rod; 510, fixing nut; 520, buffer pad. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0054] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present application.

[0055] The terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0056] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or direct connection, or indirect connection through intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include the first and second features in direct contact, or the first and second features not in direct contact but in contact through another feature between them. Moreover, the first feature is "on", "above" and "on the surface" of the second feature, which includes the first feature directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature is "under", "below" and "under" the second feature, which includes the first feature directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0058] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can refer to the same reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, which does not indicate the relationship between the various embodiments and / or settings discussed.

[0059] Reference Figure 1 、 Figure 2 The application provides a pressure exchanger 60, which comprises a sleeve piece 100, a rotor 400 and an end cover assembly, wherein the sleeve piece 100 is formed with a cylindrical mounting inner cavity 110, the rotor 400 is cylindrical and is rotatably connected in the mounting inner cavity 110, and the end cover assembly comprises a first end cover 200 and a second end cover 300, the first end cover 200 and the second end cover 300 are respectively connected at two ends of the corresponding sleeve piece 100 and are rotatably connected with two end faces of the rotor 400.

[0060] Along the axis of the rotor 400, two ends of the rotor 400 are respectively formed with a first planar end face 401 and a second planar end face 402, the first planar end face 401 is in contact with the first end cover 200, and the second planar end face 402 is in contact with the second end cover 300.

[0061] The rotor 400 is formed with at least two flow passages 410 penetrating the first planar end face 401 and the second planar end face 402, and each flow passage 410 is parallel to the axis of the rotor 400.

[0062] The first end cover 200 is formed with a first inner end face facing the rotor 400 and a first outer end face away from the rotor 400, the first inner end face is in contact with the first planar end face 401, and the first inner end face forms relative rotation with the first planar end face 401 when the rotor 400 rotates.

[0063] The second end cover 300 is formed with a second inner end face facing the rotor 400 and a second outer end face facing away from the rotor 400, and the second inner end face is in contact with the second planar end face 402, and the second inner end face and the second planar end face 402 form relative rotation when the rotor 400 rotates.

[0064] The first end cover 200 is formed with a first input passage 210 and a first output passage 220, and the second end cover 300 is formed with a second input passage 310 and a second output passage 320.

[0065] The rotor 400 and / or the end cover assembly is provided with a contact recess 440, and the contact recess 440 is formed with a recessed surface, and the recessed surface is a circular arc.

[0066] The design of the contact recess 440 can enable the rotor 400 to maintain a relatively small gap with the corresponding end cover assembly and / or sleeve 100, and improve the stability of the rotor 400 during rotation.

[0067] The contact recess 440 is formed with a recessed surface, and the recessed surface is a circular arc, which is convenient for processing and is conducive to storing hydraulic oil. The design of the contact recess 440 can enable the rotor 400 to form a dynamic pressure increment with the end cover assembly and / or the sleeve 100 on the basis of the static pressure bearing, to provide sufficient pressure and spacing to prevent contact and wear between components, to minimize or even prevent contact.

[0068] The specific arrangement position of the contact recess 440 is as follows:

[0069] In some embodiments of the present application, the contact recess 440 is dispersedly arranged on the first planar end face 401 and / or the second planar end face 402 of the rotor 400.

[0070] In other words, the contact recess 440 can be arranged on the first planar end face 401 of the rotor 400 alone to form a dynamic pressure bearing between the first planar end face 401 of the rotor 400 and the first end cover 200, or arranged on the second planar end face 402 of the rotor 400 alone to form a dynamic pressure bearing between the second planar end face 402 of the rotor 400 and the second end cover 300, or arranged on both the first planar end face 401 and the second planar end face 402 of the rotor 400.

[0071] The contact recess 440 arranged on the first planar end face 401 and / or the second planar end face 402 of the rotor 400 can enable the two end faces of the rotor 400 to maintain a relatively small gap with the corresponding first end cover 200 or second end cover 300, while also providing sufficient pressure and spacing to prevent contact and wear between components, to minimize or even prevent contact.

[0072] In some other embodiments, the contact recesses 440 are arranged on the outer wall of the rotor 400 to form a dynamic pressure bearing between the rotor 400 and the sleeve 100. In order to ensure that the dynamic pressure on the circumference of the rotor 400 is in a balanced state, the contact recesses 440 are arranged in an array on the outer wall of the rotor 400.

[0073] In some other embodiments, the contact recesses 440 are formed on the end cover assembly, and are arranged on the first inner end face and / or the second inner end face.

[0074] In other words, the contact recesses 440 can be arranged on the planar end face of the rotor alone, on the end cover assembly alone, or on the outer wall of the rotor 400 alone.

[0075] In the embodiments in which the contact recesses 440 are arranged on the outer wall of the rotor 400, in order to increase the dynamic pressure between the rotor 400 and the end cover assembly, the contact recesses 440 can also be arranged on the first inner end face and / or the second inner end face, or the contact recesses 440 can be arranged on the first planar end face 401 and / or the second planar end face 402, so as to form a dynamic pressure increment between the rotor 400 and the sleeve 100, and between the rotor 400 and the end cover assembly.

[0076] The maximum depth h of each contact recess 440 is designed to satisfy: h≤40μm, considering the actual size of the pressure exchanger 60 and the required dynamic pressure enhancement value.

[0077] The diameter d of each contact recess 440 satisfies: d≤20mm.

[0078] When the rotor 400 rotates, the rotor 400 is supported in the axial direction of the rotor 400 by the first inner end face of the first end cover 200 and the second inner end face of the second end cover 300.

[0079] During rotation of the rotor 400, the outer wall of the rotor 400 is supported by the side wall of the mounting inner cavity 110 of the sleeve 100.

[0080] The design of the contact recesses 440 enables the outer wall of the rotor 400 and the inner wall of the sleeve 100 to maintain a relatively small gap, while also providing sufficient pressure and spacing to prevent contact and wear between the elements, to minimize or even prevent contact, and also to control leakage using a relatively small gap.

[0081] In some other embodiments, a communication structure is formed between the end cover assembly and the rotor 400, and the communication structure can be arranged between the first end cover 200 and the rotor 400, or between the second end cover 300 and the rotor 400.

[0082] Specifically, the communication structure can be formed on the first end cover 200 and / or the second end cover 300, or can be provided on the rotor 400.

[0083] For example, the communication structure is formed on the first inner end face in contact with the first planar end face 401 of the rotor 400, or can be formed on the first planar end face 401 in contact with the first inner end face.

[0084] The communication structure can be formed on the second inner end face in contact with the second planar end face 402 of the rotor 400, or can be formed on the second planar end face 402 in contact with the second inner end face.

[0085] When the communication structure is formed between the first end cover 200 and the rotor 400, the communication structure is used to communicate the adjacent first input passage 210 and the first output passage 220 to gradually load or release the fluid pressure in the flow passage 410 between the first input passage 210 and the first output passage 220 when the rotor 400 rotates.

[0086] When the communication structure is formed between the second end cover 300 and the rotor 400, the communication structure is used to communicate the adjacent second input passage 310 and the second output passage 320 on the second end cover 300 to gradually load or release the fluid pressure in the flow passage 410 between the second input passage 310 and the second output passage 320 when the rotor 400 rotates.

[0087] Specifically, in some embodiments, the communication structure is a first communication recess 240 formed on the first inner end face, and the first communication recess 240 is formed between the first input passage 210 and the first output passage 220 along the rotation direction of the rotor 400.

[0088] In other embodiments, the communication structure is a second communication recess 340 formed on the second inner end face, and the second communication recess 340 is formed between the second output passage 320 and the second input passage 310 along the rotation direction of the rotor 400.

[0089] In other words, along the rotation direction of the rotor 400, at least the first input passage 210 and the first output passage 220 on the first inner end face are formed with the first communication recess 240; and / or

[0090] Along the rotation direction of the rotor 400, at least the second output passage 320 and the second input passage 310 on the second inner end face are formed with the second communication recess 340.

[0091] Reference Figure 5When the rotor 400 rotates, the first input passage 210 is used to input the first high-pressure fluid to the rotor 400, the first output passage 220 is used to output the first low-pressure fluid after pressure reduction from the rotor 400, the second input passage 310 is used to input the second low-pressure fluid to the rotor 400, and the second output passage 320 is used to output the second high-pressure fluid after pressure increase from the rotor 400.

[0092] When the rotor 400 is static, the first high-pressure fluid input from the first input passage 210 is output from the second output passage 320 after passing through the corresponding flow passage 410, and the second low-pressure fluid input from the first input passage 210 is output from the first output passage after passing through the corresponding flow passage 410.

[0093] The port of the first input passage 210 on the first inner end face is defined as the first input port, and the port of the first output passage 220 on the first inner end face is defined as the first output port.

[0094] The port of the second input passage 310 on the second inner end face is defined as the second input port, and the port of the second output passage 320 on the second inner end face is defined as the second output port.

[0095] On the first inner end face, a first high-pressure sealing surface 201 is formed between the first input port and the first output port in the rotation direction of the rotor 400, and a first low-pressure sealing surface 202 is formed between the first output port and the first input port.

[0096] On the second inner end face, a second high-pressure sealing surface 301 is formed between the second output port and the second input port in the rotation direction of the rotor 400, and a second low-pressure sealing surface 302 is formed between the second input port and the second output port.

[0097] In other words, in combination with Figure 8 , Figure 9 the pressure exchanger 60 of the present application is provided with a first communication recess 240 on at least the first high-pressure sealing surface 201, and / or a second communication recess 340 is formed on the second high-pressure sealing surface 301.

[0098] In some embodiments of the present application, the first communication recess 240 and the second communication recess 340 can be provided on the first low-pressure sealing surface 202 and the second low-pressure sealing surface 302 in addition to being provided on the first high-pressure sealing surface 201 and the second high-pressure sealing surface 301.

[0099] That is, a first communication recess 240 is also formed between the first output passage 220 and the first input passage 210 on the first inner end face in the rotation direction of the rotor 400; and / or

[0100] Along the rotation direction of the rotor 400, a second communication recess 340 is also formed between the at least second input passage 310 and the second output passage 320 on the second inner end face, in combination with Figure 10 .

[0101] The first communication recess 240 is used to realize pressure transmission between the corresponding ports of the first input passage 210 and the first output passage 220, and the second communication recess 340 is used to realize pressure transmission between the corresponding ports of the second output passage 320 and the second input passage 310, so that the pressure transmission forms a gradient between the above-mentioned ports, and during the rotation of the rotor 400, the liquid carried in the flow channel 410 and the pressure energy it has will gradually release or load during the rotation, avoiding pressure mutation, which is beneficial to eliminate the cavitation caused by pressure mutation, increase the time of pressure transmission, and reduce vibration and noise.

[0102] In some embodiments of the present application, the first communication recess 240 includes at least one circular arc groove formed between the first input passage 210 and the first output passage 220, and the center of the circular arc groove coincides with the center of the first inner end face.

[0103] The center of the first communication recess 240 coincides with the center of the first inner end face, so as to realize more smooth release of part of the pressure energy carried in the first high-pressure fluid output in the first input passage 210 to the first low-pressure fluid as the rotor 400 rotates.

[0104] The second communication recess 340 includes at least one circular arc groove formed between the second input passage 310 and the second output passage 320, and the center of the circular arc groove coincides with the center of the second inner end face.

[0105] The center of the second communication recess 340 coincides with the center of the second inner end face, so as to realize more smooth release of part of the pressure energy carried in the second high-pressure fluid output in the second input passage 310 to the second low-pressure fluid as the rotor 400 rotates.

[0106] In order to improve the pressure release effect, along the radial direction of the first inner end face, the first communication recess 240 includes a plurality of circular arc grooves arranged at intervals; along the radial direction of the second inner end face, the second communication recess 340 includes a plurality of circular arc grooves arranged at intervals.

[0107] The centers of the circular arc grooves of the first communication recess 240 coincide, and the centers of the circular arc grooves included in the second communication recess 340 coincide.

[0108] The bottom section of the first communication recess 240 and the second communication recess 340 is a smooth arc structure, and the arc recess included in the first communication recess 240 and the second communication recess 340 is smooth, so that the pressure release process is smoother, and the noise is reduced.

[0109] For example, but not limited to, a plurality of flow channels 410 are arranged at equal angles on the rotor 400, two first input passages 210 and two first output passages 220 are alternately arranged on the first end cover 200, and two second input passages 310 and two second output passages 320 are alternately arranged on the second end cover 300; during one revolution of the rotor 400, the first port of each flow channel 410 alternately communicates with the first input passage 210 and the first output passage 220 twice, and the second port of each flow channel 410 alternately communicates with the second input passage 310 and the second output passage 320 twice, to realize two pressurization processes of each flow channel 410.

[0110] The first input passage 210 and the first output passage 220 are arc-shaped passages distributed circumferentially on the first end cover 200 with the center of the first end cover 200 as the center.

[0111] The second input passage 310 and the second output passage 320 are arc-shaped passages distributed circumferentially on the second end cover 300 with the center of the second end cover 300 as the center, to realize communication with each flow channel 410 during rotation of the rotor 400.

[0112] The first communication recess 240 and the second communication recess 340 are arranged on the first high-pressure sealing surface 201 and the second high-pressure sealing surface 301, so that the first input port communicates with the first output port, and the first output port communicates with the second output port. All positions between the input port and the output port can be continuously pressurized or depressurized, the pressure loading and reduction time is longer, the pressure sudden reduction is reduced, so that the cavitation and noise are greatly reduced.

[0113] In addition, the first communication recess 240 and the second communication recess 340 make the fluid concentration of the high and low pressure ports (input and output ports) of the same end cover (first end cover 200, second end cover 300) close, which will not cause the increase of the fluid concentration entering the membrane group inlet, and will not bring negative effects.

[0114] When the pressure exchanger 60 is normally working, the rotor 400 rotates, and the liquid carried in the flow channel 410 of the rotor 400 will experience high and low pressure switching. During the high and low pressure switching process, the high and low pressure liquid will produce water hammer effect and cavitation. The high pressure fluid (first high pressure fluid and / or second high pressure fluid) carried by the rotor 400 is suddenly closed when rotating to the corresponding sealing surface area in the flow channel 410, which produces vibration and noise.

[0115] Taking the first end cover 200 as an example: when the pressure exchanger 60 is working normally, the rotor 400 rotates, and the liquid carried in the through-flow passage 410 of the rotor 400 experiences the conversion of high pressure and low pressure. The first high-pressure fluid is input into the through-flow passage 410 of the rotor 400 from the first input passage 210 through the first input port, and the first high-pressure fluid output from the first input passage 210 is isolated by the first high-pressure sealing surface 201 as the rotor 400 rotates. Because of the existence of the first communication recess 240 on the first high-pressure sealing surface 201, the transmission of the first high-pressure fluid pressure can be realized, so as to avoid sudden reduction of the pressure, and problems such as noise and cavitation erosion.

[0116] The first communication recess 240 makes the transmission of the pressure form a gradient between the high-pressure port and the low-pressure port, solves the problem of pressure mutation, is beneficial to eliminating the cavitation erosion problem caused by the pressure mutation, increases the pressure transmission time, and greatly reduces the vibration and noise.

[0117] In combination Figure 11 In other embodiments, the communication structure is arranged on the first planar end surface 401 and / or the second planar end surface 402 of the rotor 400, and the communication structure is a third communication recess 430 formed between adjacent through-flow passages 410.

[0118] Along the radial direction of the rotor 400, the third communication recess 430 includes a plurality of circular-arc grooves arranged at intervals.

[0119] The center of the circular-arc groove on the rotor 400 also coincides with the rotation center of the rotor 400, so that the partial pressure energy carried in the high-pressure fluid output from the corresponding end cover is released to the low-pressure fluid more smoothly.

[0120] Taking the case that the communication structure is formed on the first planar end surface 401, the third communication recess 430 on the first planar end surface 401 can also realize the pressure transmission between the ports corresponding to the first input passage 210 and the first output passage 220 on the first end cover 200, so that the liquid carried in the through-flow passage 410 and the pressure energy thereof are gradually released or loaded during the rotation of the rotor 400, thereby avoiding the pressure mutation and being beneficial to eliminating the cavitation erosion caused by the pressure mutation.

[0121] Similarly, when the communication structure is formed on the second planar end surface 402, the third communication recess 430 on the second planar end surface 402 can also realize the pressure transmission of the ports corresponding to the second output passage 320 and the second input passage 310 on the second end cover 300.

[0122] In some embodiments of the present application, along the axis of the rotor 400, the depth of the circular-arc groove is less than 0.5 mm, so as to avoid the problem that the circular-arc groove is too deep to cause pressure relief between the high-pressure fluid and the low-pressure fluid.

[0123] In combination Figure 10 In some embodiments, the width L of the circular-arc groove along the radial direction of the rotor 400 satisfies L < D / 2, where D is the width of the flow passage 410, to avoid the problem of excessive size of the circular-arc groove and mutual influence between the high-pressure fluid and the low-pressure fluid.

[0124] Referring to Figure 2 , Figure 3 , Figure 6 and Figure 7 The rotor 400 is provided with a through central hole 420, the first end cover 200 is provided with a through first connecting hole 230, and the second end cover 300 is provided with a through second connecting hole 330. The central hole 420, the first connecting hole 230, and the second connecting hole 330 are mutually through.

[0125] The rotor 400 is connected between the first end cover 200 and the second end cover 300 through a tensioning rod 500. The tensioning rod 500 is connected in the central hole 420, and the two ends of the tensioning rod 500 extend to the outside of the first end cover 200 and the second end cover 300, respectively, to connect the first end cover 200, the rotor 400, and the second end cover 300.

[0126] Specifically, the tensioning rod 500 is provided with a limiting portion, and the limiting portion is located on the outer surface of the first end cover 200 and the second end cover 300 away from the rotor 400, respectively, to limit the first end cover 200 and the second end cover 300.

[0127] The corresponding position of the tensioning rod 500 is formed with an external thread, and the limiting portion includes a buffer pad 520 and a fixing nut 510. The fixing nut 510 is threadedly connected to the tensioning rod 500, and the buffer pad 520 is located between the fixing nut 510 and the first end cover 200 or the second end cover 300.

[0128] Referring to Figure 10 , Figure 11 The pressure exchanger 60 is applied to a water treatment system, and the water treatment system further includes a water pump 10, a first water conveying pipeline 20, a circulating pipeline 40, a reverse osmosis membrane group 30, and a second water conveying pipeline 50.

[0129] One end of the first water conveying pipeline 20 is connected to the water pump 10, and the other end is connected to the input end of the reverse osmosis membrane group 30. The first water conveying pipeline 20 is provided with a high-pressure pump 21, and the low-pressure output end of the reverse osmosis membrane group 30 is connected to a first water discharge pipeline 31.

[0130] One end of the circulation pipeline 40 is connected with the high-pressure output end of the reverse osmosis membrane group 30, and the other end is connected with the first water delivery pipeline 20 downstream of the high-pressure pump 21 through the pressure exchanger 60. The first water delivery pipeline 20 is further provided with the booster pump 41, which is arranged between the pressure exchanger 60 and the first water delivery pipeline 20.

[0131] One end of the second water delivery pipeline 50 is connected with the water pump 10, and the other end is connected with the pressure exchanger 60.

[0132] The first input passage 210 of the pressure exchanger 60 is connected with the high-pressure output end of the reverse osmosis membrane group 30 through the circulation pipeline 40, and the first output passage 220 is connected with the second drain pipe 61. The second input passage 310 is connected with the water pump 10 through the second water delivery pipeline 50, and the second output passage 320 is connected with the booster pump 41 through the circulation pipeline 40.

[0133] When the rotor 400 is static, the first high-pressure fluid in the circulation pipeline 40 enters the pressure exchanger 60 from the first input passage 210, and after passing through the corresponding flow passage 410, it is output to the downstream of the circulation pipeline 40 from the second output passage 320. The second low-pressure fluid in the second water delivery pipeline 50 enters the pressure exchanger 60 from the second input passage 310, and after passing through the corresponding flow passage 410, it is output to the second drain pipe 61 from the first output passage 220.

[0134] When the rotor 400 rotates, the first high-pressure fluid in the circulation pipeline 40 enters the pressure exchanger 60 from the first input passage 210, and after passing through the corresponding flow passage 410, it is decompressed by the second low-pressure fluid to form the first low-pressure fluid, which is discharged from the first output passage 220 to the second drain pipe 61. The second low-pressure fluid in the second water delivery pipeline 50 enters the pressure exchanger 60 from the second input passage 310, and after passing through the corresponding flow passage 410, it is pressurized by the first high-pressure fluid to form the second high-pressure fluid, which is input into the circulation pipeline 40 from the corresponding second output passage 320.

[0135] Specifically, the first high-pressure fluid can be supplied to the pressure exchanger 60, enter the first input passage 210 on the first end cover 200, and enter the flow passage 410 of the rotor 400 through the first input port. When the rotor 400 rotates, the flow passage 410 is positioned in selective communication with the first input port on the first end cover 200, so that at least part of the fluid can enter the first input passage 210 to pressurize the second low-pressure fluid input into the corresponding flow passage 410 from the second input passage 310 on the second end cover 300.

[0136] Second low pressure fluid is supplied into the flow passages 410 through second input passages 310 in the second end cap 300, and as the rotor 400 rotates, the second low pressure fluid flow is positioned in selective communication with one or more flow passages 410 so that at least a portion of the fluid can enter the flow passages 410.

[0137] As above, the second low pressure fluid that enters the flow passages 410 is pressurized by the first high pressure fluid to form second high pressure fluid, which is at least partially output from the flow passages 410 through second output passages 320.

[0138] As the rotor 400 rotates, second low pressure fluid (e.g., to be pressurized) can be supplied into the flow passages 410 through second input passages 310 in the second end cap 300.

[0139] As above, the first high pressure fluid that was previously supplied into the flow passages 410 is reduced in pressure due to having pressurized the second low pressure fluid to form first low pressure fluid, which is output from the first low pressure passages through the first end cap 200 and can exit the pressure exchange device. This process repeats in a similar manner to supply fluid, pressurize the fluid, and then discharge the pressurized and used fluid.

[0140] The various aspects and features described and illustrated in the specification can be employed alone or in any combination with one another, and these individual aspects can be the subject of separate applications.

[0141] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0142] The above merely describes the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A pressure exchanger, characterized in that, include: A sleeve component having an internal mounting cavity formed therein; A rotor, which is rotatably connected in the mounting cavity, has flow channels formed on it, and each flow channel is parallel to the axis of the rotor; An end cap assembly includes a first end cap and a second end cap, the first end cap and the second end cap being located at opposite ends of the sleeve; a first input passage and a first output passage are formed on the first end cap, and a second input passage and a second output passage are formed on the second end cap. The rotor and / or the end cap assembly are provided with a contact recess, and a concave surface is formed in the contact recess, the concave surface being arc-shaped.

2. The pressure exchanger according to claim 1, characterized in that, Along the axis of the rotor, a first planar end face and a second planar end face are formed at both ends of the rotor, respectively. The first planar end face is in contact with the first inner end face on the first end cover, and the second planar end face is in contact with the second inner end face on the second end cover.

3. The pressure exchanger according to claim 2, characterized in that, The contact recess is provided on the outer wall of the rotor and / or the first planar end face and / or the second planar end face.

4. The pressure exchanger according to claim 2, characterized in that, The contact recess is formed on the first inner end face and / or the second inner end face.

5. The pressure exchanger according to claim 1, characterized in that, The maximum depth h of each of the contact recesses satisfies: h ≤ 40 μm; The diameter d of each contact recess satisfies: d ≤ 20mm.

6. The pressure exchanger according to claim 2, characterized in that, A connecting structure is formed between the first end cap and the rotor. The connecting structure is formed on the first inner end face or the first planar end face. The connecting structure is used to connect the adjacent first input path and the first output path when the rotor rotates.

7. The pressure exchanger according to claim 2, characterized in that, A connecting structure is formed between the second end cover and the rotor. The connecting structure is formed on the second inner end face or the second planar end face. The connecting structure is used to connect the adjacent second input passage and the second output passage on the second end cover when the rotor rotates.

8. The pressure exchanger according to claim 6, characterized in that, The connecting structure is a first connecting recess formed on the first inner end face. Along the rotation direction of the rotor, the first connecting recess is formed between the first input passage and the first output passage. Along the radial direction of the first inner end face, the first connecting recess includes at least one arcuate groove formed between the first input passage and the first output passage.

9. The pressure exchanger according to claim 7, characterized in that, The connecting structure is a second connecting recess formed on the second inner end face. Along the rotation direction of the rotor, the second connecting recess is formed between the second output passage and the second input passage. Along the radial direction of the second inner end face, the second connecting recess includes a plurality of arc grooves spaced apart.

10. The pressure exchanger according to claim 8 or 9, characterized in that, Along the axis of the rotor, the depth of the arcuate groove is less than 0.5 mm.

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