A rotary pump

Abstract

A rotary pump belongs to the technical field of liquid pumps; a negative wheel is respectively arranged on both sides of a positive wheel, a plurality of rim teeth are arranged on the positive wheel, and a rim tooth groove corresponding to the number and position of the rim teeth is arranged on the negative wheel, and the end of the rim tooth is arranged in the rim tooth groove. Since the axis center of the main shaft and the axis center of the positioning cam are eccentrically arranged, the positions of the two negative wheels will be offset upward relative to the positive wheel. During rotation, the rim teeth at the lower inner side of the pump cavity 4 are located at the notch of the rim tooth groove, so that the outer tooth plate is exposed outside the notch of the rim tooth groove. Since the diameter of the negative wheel is smaller than the diameter of the positive wheel spoke plate, there is a spacing space between the inner wall at the lower inner side of the pump cavity and the negative wheel, and the gap between the upper arc surface of the negative wheel and the inner wall of the pump cavity fits, and through the rotation of the negative wheel and the positive wheel, the rim teeth press the liquid from the liquid inlet cavity to the liquid outlet cavity, thereby realizing the effect of liquid transportation; through the arrangement of the two negative wheels, the working efficiency of the present invention is improved, and the stability is good.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid pump equipment, and in particular relates to a rotary pump. Background Art

[0002] A pump is a machine that transports fluids or pressurizes fluids. It transfers the mechanical energy of the prime mover or other external energy to the liquid, increasing the energy of the liquid. Pumps are mainly used to transport liquids such as water, oil, acid and alkali liquids, emulsions, suspensions and liquid metals. They can also transport liquid-gas mixtures and liquids containing suspended solids. Pumps can usually be divided into three categories according to their working principles: positive displacement pumps, dynamic pumps and other types of pumps.

[0003] Among them, the vane pump is a type of positive displacement pump. The vane pump is a pump in which the vanes in the rotor groove are in contact with the pump housing (stator ring), and the sucked liquid is pressed from the liquid inlet side to the liquid discharge side.

[0004] Existing vane pumps are sensitive to oil contamination, and the vanes are easily bitten by impurities in the oil. They have poor working reliability and low long-term working efficiency. Summary of the invention

[0005] The present invention mainly solves the technical problems existing in the above-mentioned prior art and provides a rotary pump.

[0006] The above technical problems of the present invention are mainly solved by the following technical solutions: a rotary pump, comprising a pump housing, a liquid outlet pipe is connected to the upper left side of the pump housing, a liquid inlet pipe is connected to the upper right side of the pump housing, a pump chamber which is through-connected from front to back is provided on the inner side of the pump housing, a front cover plate is installed on the front surface of the pump housing through bolt sealing, and a rear cover plate is installed on the rear surface of the pump housing through bolt sealing, the pump chamber has a circular shape, a liquid inlet chamber is provided on the upper right side of the pump chamber, a liquid outlet chamber is provided on the upper left side of the pump chamber, the liquid inlet chamber is connected to the liquid inlet pipe, the liquid outlet chamber is connected to the liquid outlet pipe, a rotary wheel is provided in the axial direction of the pump chamber, the rotary wheel comprises a negative wheel and a positive wheel, the number of the negative wheels is two, and the two negative wheels are respectively provided on the front and rear sides of the positive wheel.

[0007] Preferably, the male wheel comprises a male wheel spoke plate, a male wheel hub core and rim teeth, the male wheel spoke plate is a circular plate, the end face of the male wheel hub core is triangular, the axis center of the male wheel hub core is provided with a rotating shaft hole that passes through front and back, a main shaft is fixed in the rotating shaft hole, three outer corners of the male wheel hub core body are provided with hub core through holes that pass through front and back, an elastic sleeve is sleeved in the hub core through hole, the male wheel hub core passes through the center of the male wheel spoke plate, and a fixed sleeve is provided between the inner side of the male wheel spoke plate and the middle end of the male wheel hub core. The number of the rim teeth is several, and the several rim teeth are all in the shape of long strips. The several rim teeth are evenly and vertically arranged at the outer edge of the male wheel spoke plate. The middle part of the rim teeth in the length direction is fixedly connected to the male wheel spoke plate. An outer tooth plate is arranged on the outer side of the middle part of the cross section of the rim teeth. Both ends of the rim teeth on the side away from the outer tooth plate are provided with limiting round heads. An arc surface is arranged on the outer side of the outer tooth plate. The arc radius of the arc surface is equal to the radius of the male wheel spoke plate, and the arc edge of the arc surface coincides with the outer circular edge of the male wheel spoke plate.

[0008] The overall shape of the negative wheel is a circular wheel, the outer ring of the negative wheel is provided with a rim, the rim is provided with rim tooth grooves corresponding to the number and position of rim teeth, the inner side of the negative wheel is a hollow structure, a negative wheel spoke plate is fixedly provided in the middle of the hollow part of the inner side of the negative wheel, a negative wheel hub core is fixedly provided at the front side of the inner side of the negative wheel and at the center of the negative wheel spoke plate, the negative wheel hub core is annular, a negative wheel rotation hole is provided in the center of the negative wheel hub core, three pin shaft holes are evenly distributed on the outer ring of the negative wheel hub core, a plurality of heat dissipation strips are also evenly distributed on the outer ring of the negative wheel hub core, and the structures of the two negative wheels are the same;

[0009] The male wheel is located in the pump cavity, and the male wheel spoke plate and the inner wall of the pump cavity are in clearance rotation fit.

[0010] Preferably, inner grooves are provided on both sides of the rim teeth, the inner grooves on both sides are symmetrically arranged, and the two limiting round heads on the rim teeth are symmetrically arranged.

[0011] Preferably, a plurality of reinforcement holes are evenly distributed on the plate body of the male wheel spoke plate, and a plurality of grooves are opened on the outer ring edge of the male wheel spoke plate.

[0012] Preferably, when the two negative wheels are installed with the positive wheel, the rear side surface of the negative wheel is connected to the positive wheel spoke plate, and the three pin shaft holes of the two negative wheels respectively correspond to the front and rear positions of the three hub core through holes, and pin shafts are provided in the three pin shaft holes of the negative wheel located on the front side of the positive wheel spoke plate, and the front end of the pin shaft is fixed in the pin shaft hole, and the rear end of the pin shaft is fixed in the three pin shaft holes of the negative wheel on the rear side of the positive wheel spoke plate, and the middle parts of the three pin shafts are respectively arranged in the corresponding elastic sleeves, and the pin shafts and the elastic sleeves are clearance fit.

[0013] Preferably, the number of the rim teeth and rim tooth grooves are both three, the front and rear ends of the rim teeth are respectively arranged in the rim tooth grooves of the two negative wheels, the end face of the rim teeth is flush with the front end face of the negative wheel, and the two sides of the rim tooth groove are provided with semicircular inner grooves with equal inner diameters, and the rim edges on both sides of the rim tooth groove are provided with notch transition round heads, the inner edge of the notch transition round head is tangent to the arc edge of the semicircular inner groove, and the external tooth plate is arranged at the rim tooth groove notch.

[0014] Preferably, a positioning cam is provided at the center of one side where the front cover plate is connected to the pump housing, a main shaft hole is provided on the lower side of the center of the positioning cam, a sealing gasket is provided on the outside of the positioning shaft hole and on the surface of the front cover plate, the front cover plate and the rear cover plate have the same structure, the main shaft hole on the front cover plate passes through the front and rear sides of the front cover plate, the rear side of the main shaft hole on the rear cover plate is covered by the rear cover plate, the front and rear ends of the main shaft respectively pass through two negative wheel rotation holes, the front end of the main shaft passes through the main shaft hole of the front cover plate and extends to the front side of the front cover plate, the rear end of the main shaft is arranged in the main shaft hole of the rear cover plate, the positioning cam of the front cover plate is arranged in the negative wheel rotation hole of the negative wheel on the front side of the male wheel spoke plate and is rotatably connected to it, and the positioning cam of the rear cover plate is arranged in the negative wheel rotation hole of the negative wheel on the rear side of the male wheel spoke plate and is rotatably connected to it.

[0015] Preferably, a right corner is provided between the upper left side of the liquid inlet chamber body and the inner wall of the pump chamber, and a left corner is provided between the upper right side of the liquid outlet chamber body and the inner wall of the pump chamber, the right corner and the left corner are both facing downward, a plurality of blocking grooves are provided on the inner wall on the lower side of the pump chamber, and buffer chambers are provided on the left and right sides of the inner wall at the top of the pump chamber.

[0016] The present invention has the beneficial effects:

[0017] Yin wheels are respectively arranged on both sides of the male wheel, a plurality of rim teeth are arranged on the male wheel, and rim tooth grooves corresponding to the number and position of the rim teeth are arranged on the female wheel, and the ends of the rim teeth are arranged in the rim tooth grooves. Since the axis of the main shaft and the axis of the positioning cam are eccentrically arranged, the positions of the two female wheels will be offset upward relative to the male wheel. When rotating, the rim teeth at the lower inner side of the pump chamber 4 are located at the notch of the rim tooth groove, so that the outer tooth plate is exposed outside the notch of the rim tooth groove. Since the diameter of the female wheel is smaller than the diameter of the male wheel spoke plate, there is a gap between the inner wall at the lower inner side of the pump chamber and the female wheel, and the gap between the upper arc surface of the female wheel and the inner wall of the pump chamber is close to the inner wall of the pump chamber. The rim teeth press the liquid from the liquid inlet chamber to the liquid outlet chamber through the rotation of the negative wheel and the positive wheel, and the liquid delivery effect is achieved through the continuous rotation of the three rim teeth; the setting of the two negative wheels can improve the working efficiency of the present invention, and the characteristics of good stability; the downward design of the left edge can enable the liquid to enter the liquid outlet chamber better, and the downward design of the right edge can enable the entering liquid to flow downward, playing an auxiliary role, and the blocking groove cooperates with the groove to bite off some impurities; the buffer chamber has a pressure relief effect on the liquid when the two negative wheels rotate clockwise, and can store some fine impurities at the same time, so that the pump chamber is not easy to wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the pump housing of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the pump housing of the present invention after the male wheel is installed;

[0021] Figure 4 It is a schematic diagram of the structure after the pump housing of the present invention is installed with the positive wheel and the negative wheel;

[0022] Figure 5 This is a front view structural schematic diagram of the male wheel of the present invention;

[0023] Figure 6 It is a side view structural schematic diagram of the male wheel of the present invention;

[0024] Figure 7 It is a three-dimensional structural schematic diagram of the positive wheel of the present invention;

[0025] Figure 8 It is a three-dimensional structural schematic diagram of the Yin wheel of the present invention;

[0026] Fig. 9 It is a front view structural schematic diagram of the Yin wheel of the present invention;

[0027] Fig.10 It is a rear view structural schematic diagram of the Yin wheel of the present invention;

[0028] Fig.11 It is a side view structural schematic diagram of the negative wheel of the present invention;

[0029] Fig.12 It is a structural schematic diagram of the front cover of the present invention;

[0030] Fig.13 It is a schematic diagram of a connection structure of the front cover plate, the rear cover plate and the main shaft of the present invention;

[0031] Fig.14 yes Figure 4 A schematic diagram of a structure with part A enlarged.

[0032] In the figure: 1, pump housing; 2, liquid outlet pipe; 3, liquid inlet pipe; 4, pump chamber; 5, front cover plate; 6, rear cover plate; 7, liquid inlet chamber; 8, liquid outlet chamber; 9, negative wheel; 901, rim tooth groove; 902, negative wheel spoke plate; 903, negative wheel hub core; 904, negative wheel rotation hole; 905, pin shaft hole; 906, pin shaft; 907, heat dissipation strip; 9011, semicircular inner groove; 9012, notch transition round head; 10, positive wheel; 101, positive wheel spoke plate; 102, male hub core; 103, rim teeth; 104, rotating shaft hole; 105, hub core through hole; 106, outer tooth plate; 107, limiting round head; 108, inner groove; 1011, reinforcement hole; 1012, groove; 1041, main shaft; 1051, elastic sleeve; 1061, arc surface; 11, positioning cam; 12, main shaft hole; 13, sealing gasket; 14, right edge; 15, left edge; 16, blocking groove; 17, buffer chamber. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0034] Embodiment: A rotary pump, such as Figure 1-Figure 14 As shown, it includes a pump housing 1, a liquid outlet pipe 2 is connected to the upper left side of the pump housing 1, a liquid inlet pipe 3 is connected to the upper right side of the pump housing 1, a pump chamber 4 which passes through from front to back is opened on the inner side of the pump housing 1, a front cover plate 5 is installed on the front surface of the pump housing 1 through bolt sealing, and a rear cover plate 6 is installed on the rear surface of the pump housing 1 through bolt sealing, the pump chamber 4 has a circular cavity shape, a liquid inlet cavity 7 is opened on the upper right side of the pump chamber 4, a liquid outlet cavity 8 is opened on the upper left side of the pump chamber 4, the liquid inlet cavity 7 is connected with the liquid inlet pipe 3, and the liquid outlet cavity 8 is connected with the liquid outlet pipe 2, a runner is arranged in the axial direction of the pump chamber 4, the runner includes a negative wheel 9 and a positive wheel 10, the number of the negative wheels 9 is two, and the two negative wheels 9 are respectively arranged on the front and rear sides of the positive wheel 10.

[0035] The male wheel 10 comprises a male wheel spoke plate 101, a male wheel hub core 102 and a rim tooth 103. The male wheel spoke plate 101 is a circular plate. The end face of the male wheel hub core 102 is triangular. The axis center of the male wheel hub core 102 is provided with a rotating shaft hole 104 which passes through from front to back. A main shaft 1041 is fixed in the rotating shaft hole 104. The main shaft 1041 and the rotating shaft hole 104 are clamped by a flat key pin. Hub core through holes 105 are passed through from front to back at the three outer corners of the core body of the male wheel hub core 102. An elastic sleeve 1051 is sleeved in the hub core through hole 105. The elastic sleeve 1051 adopts a pipe material which is both soft and elastic. The male wheel hub core 102 passes through the center of the male wheel spoke plate 101. The inner side of the male wheel spoke plate 101 and the male wheel hub core 102 are connected to each other. The middle ends of the rim teeth 103 are fixedly connected, the number of the rim teeth 103 is several, the several rim teeth 103 are all in the shape of long strips, the lengths of the several rim teeth 103 are equal, the several rim teeth 103 are evenly and vertically arranged at the outer edge of the male spoke plate 101, the middle part of the length direction of the rim teeth 103 is fixedly connected to the male spoke plate 101, an outer tooth plate 106 is arranged on the outer side of the middle part of the cross section of the rim teeth 103, the outer tooth plate 106 is made of wear-resistant material, and limiting round heads 107 are arranged on both ends of the rim teeth 103 away from the outer tooth plate 106, an arc surface 1061 is arranged on the outer edge of the outer tooth plate 106, the arc radius of the arc surface 1061 is equal to the radius of the male spoke plate 101, and the arc edge of the arc surface 1061 coincides with the outer circular edge of the male spoke plate 101;

[0036] The overall shape of the negative wheel 9 is a circular wheel, and a rim 908 is provided on the outer ring of the negative wheel 9. The rim 908 is provided with rim tooth grooves 901 corresponding to the number and position of the rim teeth 103. The inner side of the negative wheel 9 is a hollow structure. A negative wheel spoke plate 902 is fixedly provided in the middle of the hollow part of the inner side of the negative wheel 9. A negative wheel hub core 903 is fixedly provided at the front side of the inner part of the negative wheel 9 and at the center of the negative wheel spoke plate 902. The negative wheel hub core 903 is annular, and a negative wheel rotating hole 904 is provided in the center of the negative wheel hub core 903. Three pin shaft holes 905 are evenly distributed on the outer ring of the negative wheel hub core 903. A plurality of heat dissipation strips 907 are also evenly distributed on the outer ring of the negative wheel hub core 903. The heat dissipation strips 907 are used to dissipate the heat on the negative wheel spoke plate 902 and the negative wheel hub core 903. The structures of the two negative wheels 9 are the same.

[0037] The male wheel 10 is located in the pump chamber 4 , and the male wheel spoke plate 101 is rotationally fitted with the inner wall of the pump chamber 4 with clearance.

[0038] Inner grooves 108 are provided on both sides of the rim tooth 103, and the inner grooves 108 on both sides are symmetrically arranged. The two limiting round heads 107 on the rim tooth 103 are symmetrically arranged. The arrangement of the limiting round heads 107 can make the rim tooth 103 circulate and swing more smoothly in the rim tooth groove 901.

[0039] The plate body of the male wheel spoke plate 101 is evenly provided with a plurality of reinforcement holes 1011 , which can release the stress of the male wheel spoke plate 101 . The outer ring edge of the male wheel spoke plate 101 is provided with a plurality of grooves 1012 .

[0040] When the two negative wheels 9 and the positive wheel 10 are installed, the rear side of the negative wheel 9 is connected to the male wheel spoke plate 101, and the three pin holes 905 of the two negative wheels 9 respectively correspond to the front and rear positions of the three hub core through holes 105, and the three pin holes 905 of the negative wheel 9 located on the front side of the male wheel spoke plate 101 are all provided with pins 906, and the front end of the pin 906 is fixed in the pin hole 905, and the rear end of the pin 906 is fixed in the three pin holes 905 of the negative wheel 9 on the rear side of the male wheel spoke plate 101. The middle parts of the three pins 906 are respectively arranged in the corresponding elastic sleeves 1051, and the pins 906 and the elastic sleeves 1051 are clearance-fitted.

[0041] The number of the rim teeth 103 and the rim tooth grooves 901 are both three. The front and rear ends of the rim teeth 103 are respectively arranged in the rim tooth grooves 901 of the two negative wheels 9. The end surface of the rim teeth 103 is flush with the front end surface of the negative wheel 9. Both sides of the rim tooth grooves 901 are provided with semicircular inner grooves 9011 with equal inner diameters. The semicircular inner grooves 9011 and the limiting round heads 107 are movably matched to enable the rim teeth 103 to move in the rim tooth grooves 901. The edges of the rim 908 on both sides of the notch are provided with notch transition round heads 9012, which are movably connected with the inner concave surface of the inner groove 108. The inner edge of the notch transition round head 9012 is tangent to the arc edge of the semicircular inner groove 9011. The tangent of the arc edge makes the rim teeth 103 more flexible. The outer tooth plate 106 is arranged at the notch of the rim tooth groove 901, and the diameter of the negative wheel 9 is smaller than the diameter of the positive wheel spoke plate 101.

[0042] A positioning cam 11 is provided at the center of one side where the front cover plate 5 is connected to the pump housing 1. A spindle hole 12 is provided at the lower side of the center of the positioning cam 11. A sealing gasket 13 is provided on the outer side of the positioning shaft hole and on the surface of the front cover plate 5. The sealing gasket 13 seals the pump chamber 4. The front cover plate 5 has the same structure as the rear cover plate 6. The spindle hole 12 on the front cover plate 5 runs through the front and rear sides of the front cover plate 5. The rear side of the spindle hole 12 on the rear cover plate 6 is covered by the rear cover plate 6. The spindle 1041 The front and rear ends pass through two negative wheel rotating holes 904 respectively, the front end of the main shaft 1041 passes through the main shaft hole 12 of the front cover plate 5 and extends to the front side of the front cover plate 5, and the rear end of the main shaft 1041 is arranged in the main shaft hole 12 of the rear cover plate 6, the positioning cam 11 of the front cover plate 5 is arranged in the negative wheel rotating hole 904 of the negative wheel 9 on the front side of the male wheel spoke plate 101 and is rotatably connected to it, and the positioning cam 11 of the rear cover plate 6 is arranged in the negative wheel rotating hole 904 of the negative wheel 9 on the rear side of the male wheel spoke plate 101 and is rotatably connected to it.

[0043] A right corner 14 is provided between the upper left side of the inlet chamber 7 and the inner wall of the pump chamber 4, and a left corner 15 is provided between the upper right side of the outlet chamber 9 and the inner wall of the pump chamber 4. The corners of the right corner 14 and the left corner 15 are both facing downwards, and a plurality of blocking grooves 16 are provided on the inner wall of the lower side of the pump chamber 4. A buffer chamber 17 is provided on both sides of the inner wall at the top of the pump chamber 4. The downward design of the left corner 15 enables the liquid to enter the outlet chamber 8 better, and the downward design of the right corner 14 enables the liquid entering to flow downwards, playing an auxiliary role. The blocking groove 16 cooperates with the groove 1012 to bite off some impurities. The buffer chamber 17 has a pressure relief effect on the liquid when the two negative wheels 9 rotate clockwise, and can store some fine impurities at the same time, so that the pump chamber 4 is not easy to wear.

[0044] The assembly principle of the present invention:

[0045] The two negative wheels 9 are respectively installed to the front and rear sides of the positive wheel 10. The rear sides of the two negative wheels 9 are connected to the positive wheel spoke plate 101. The front and rear ends of the three pin shafts 906 are respectively fixed in the pin shaft holes 905 of the negative wheels 9 on both sides. The middle part of the pin shaft 906 is arranged in the elastic sleeve 1051. When installing the negative wheel 9, the two ends of the rim tooth 103 are inserted into the rim tooth groove 901, and then the main shaft 1041 is inserted into the rotating shaft hole 104. The main shaft 1041 and the rotating shaft hole 104 are clamped by a flat key pin. After installing the negative wheel 9, the two negative wheels 9 and the positive wheel 10 are placed in the pump chamber 4 as a whole, and the front The cover plate 5 and the rear cover plate 6 respectively cover the front and rear sides of the pump chamber 4, and the front and rear ends of the main shaft 1041 respectively pass through the two negative wheel rotating holes 904, the front end of the main shaft 1041 passes through the main shaft hole 12 of the front cover plate 5 and extends to the front side of the front cover plate 5, and the rear end of the main shaft 1041 is arranged in the main shaft hole 12 of the rear cover plate 6, and the positioning cam 11 of the front cover plate 5 is arranged in the negative wheel rotating hole 904 of the negative wheel 9 on the front side of the male wheel spoke plate 101 and is rotatably connected thereto, and the positioning cam 11 of the rear cover plate 6 is arranged in the negative wheel rotating hole 904 of the negative wheel 9 on the rear side of the male wheel spoke plate 101 and is rotatably connected thereto.

[0046] The operating principle of the present invention:

[0047] The output shaft of the external power motor is connected to the main shaft 1041 of the present invention through a coupling. The rotation of the main shaft 1041 drives the male hub core 102, which rotates synchronously with the male spoke plate 101 and the rim teeth 103 through the male hub core 102. At the same time, the two female wheels 9 are driven through the three pin shafts 906. The power transmission between the pin shafts and the hub core through hole 105 can be well buffered by the setting of the elastic sleeve 1051. The two female wheels 9 rotate on the corresponding positioning cam shafts 11 respectively. Since the axis center of the main shaft 1041 and the axis center of the positioning cam shaft 11 are eccentrically set, the two female wheels 9 will be offset upward relative to the male wheel 10. During rotation, the rim teeth 103 at the lower inner side of the pump chamber 4 is at the notch of the rim tooth groove 901, so that the outer tooth plate 106 is exposed outside the notch of the rim tooth groove 901. Since the diameter of the female wheel 9 is smaller than the diameter of the male spoke plate 101, there is a gap between the inner wall at the lower inner side of the pump chamber 4 and the female wheel 9, such as Figure 4 As shown in the C position, the upper arc surface of the negative wheel 9 fits the gap between the inner wall of the pump chamber 4. Through the rotation of the negative wheel 9 and the positive wheel 10, the rim teeth 103 press the liquid from the liquid inlet chamber 7 to the liquid outlet chamber 8. The three rim teeth 103 rotate continuously to achieve the purpose of liquid transportation. Fig.14 The dotted line in the figure is the rotational movement trajectory of the rim teeth 103;

[0048] The downward design of the left edge 15 enables the liquid to enter the liquid outlet chamber 8 better, and the downward design of the right edge 14 enables the entering liquid to flow downward, playing an auxiliary role. The rotation of the male wheel spoke plate 101 enables the blocking groove 16 to cooperate with the groove 1012 to bite off some impurities. The buffer chamber 17 has a pressure relief effect on the liquid when the two female wheels 9 rotate clockwise, and can store some fine impurities at the same time, making the pump chamber 4 not easy to wear.

[0049] Finally, it should be pointed out that the above embodiments are only representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention should be considered to belong to the protection scope of the present invention.

Claims

1. A rotary pump, comprising a pump housing (1), wherein a liquid outlet pipe (2) is connected to the upper left side of the pump housing (1), a liquid inlet pipe (3) is connected to the upper right side of the pump housing (1), a pump chamber (4) which is connected front to back is formed inside the pump housing (1), a front cover plate (5) is installed on the front surface of the pump housing (1) through bolt sealing, and a rear cover plate (6) is installed on the rear surface of the pump housing (1) through bolt sealing, characterized in that The pump chamber (4) is circular in shape, a liquid inlet chamber (7) is provided on the upper right side of the pump chamber (4), a liquid outlet chamber (8) is provided on the upper left side of the pump chamber (4), the liquid inlet chamber (7) is connected to the liquid inlet pipe (3), the liquid outlet chamber (8) is connected to the liquid outlet pipe (2), a rotating wheel is provided in the axial direction of the pump chamber (4), the rotating wheel comprises a negative wheel (9) and a positive wheel (10), the number of the negative wheels (9) is two, and the two negative wheels (9) are respectively provided on the front and rear sides of the positive wheel (10); The male wheel (10) comprises a male wheel spoke plate (101), a male wheel hub core (102) and rim teeth (103); the male wheel spoke plate (101) is a circular plate; the end face of the male wheel hub core (102) is triangular; a rotating shaft hole (104) is provided at the axis center of the male wheel hub core (102) and is passed through from front to back; a main shaft (1041) is fixedly provided in the rotating shaft hole (104); hub core through holes (105) are provided at the three outer corners of the core body of the male wheel hub core (102) and are passed through from front to back; an elastic sleeve (1051) is sleeved in the hub core through hole (105); the male wheel hub core (102) passes through the center of the male wheel spoke plate (101); a fixed connection is provided between the inner side of the male wheel spoke plate (101) and the middle end of the male wheel hub core (102). The number of the rim teeth (103) is a plurality, and the plurality of the rim teeth (103) are all in the shape of long strips. The plurality of the rim teeth (103) are evenly and perpendicularly arranged at the outer edge of the male wheel spoke plate (101). The middle portion of the rim teeth (103) in the length direction is fixedly connected to the male wheel spoke plate (101). An outer tooth plate (106) is arranged on the outer side of the middle portion of the cross section of the rim teeth (103). Both ends of the rim teeth (103) on the side away from the outer tooth plate (106) are provided with limiting round heads (107). An arc surface (1061) is arranged on the outer edge of the outer tooth plate (106). The arc radius of the arc surface (1061) is equal to the radius of the male wheel spoke plate (101), and the arc edge of the arc surface (1061) coincides with the outer circular edge of the male wheel spoke plate (101). The negative wheel (9) is in the shape of a circular wheel as a whole. The outer ring of the negative wheel (9) is provided with a rim (908). The rim (908) is provided with rim tooth grooves (901) corresponding to the number and position of the rim teeth (103). The inner side of the negative wheel (9) is a hollow structure. A negative wheel spoke plate (902) is fixedly provided in the middle of the hollow part of the inner side of the negative wheel (9). A negative wheel hub core (903) is fixedly provided at the front side of the inner side of the negative wheel (9) and at the center of the negative wheel spoke plate (902). The negative wheel hub core (903) is in the shape of a circular ring. A negative wheel rotation hole (904) is provided at the center of the negative wheel hub core (903). Three pin shaft holes (905) are evenly distributed on the outer ring of the negative wheel hub core (903). A plurality of heat dissipation strips (907) are also evenly distributed on the outer ring of the negative wheel hub core (903). The two negative wheels (9) have the same structure. The male wheel (10) is located in the pump chamber (4), and the male wheel spoke plate (101) and the inner wall of the pump chamber (4) are in a clearance rotation fit; When the two negative wheels (9) and the positive wheel (10) are installed, the rear side surface of the negative wheel (9) is connected to the positive wheel spoke plate (101), the three pin shaft holes (905) of the two negative wheels (9) respectively correspond to the front and rear positions of the three hub core through holes (105), the three pin shaft holes (905) of the negative wheel (9) located on the front side of the positive wheel spoke plate (101) are all provided with pin shafts (906), the front end of the pin shaft (906) is fixed in the pin shaft hole (905), the rear end of the pin shaft (906) is fixed in the three pin shaft holes (905) of the negative wheel (9) on the rear side of the positive wheel spoke plate (101), the middle parts of the three pin shafts (906) are respectively provided in the corresponding elastic sleeves (1051), and the pin shafts (906) and the elastic sleeves (1051) are clearance-fitted; Inner grooves (108) are provided on both sides of the rim tooth (103), the inner grooves (108) on both sides are symmetrically arranged, and the two limiting round heads (107) on the rim tooth (103) are symmetrically arranged.

2. A rotary pump according to claim 1, characterized in that A plurality of reinforcement holes (1011) are evenly distributed on the plate body of the male wheel spoke plate (101), and a plurality of grooves (1012) are opened on the outer ring edge of the male wheel spoke plate (101).

3. A rotary pump according to claim 1, characterized in that The number of the rim teeth (103) and the number of the rim tooth grooves (901) are both three. The front and rear ends of the rim teeth (103) are respectively arranged in the rim tooth grooves (901) of the two negative wheels (9). The end surface of the rim teeth (103) is flush with the front end surface of the negative wheel (9). Both sides of the rim tooth groove (901) are provided with semicircular inner grooves (9011) with equal inner diameters. The edges of the rim (908) on both sides of the groove opening of the rim tooth groove (901) are provided with groove transition round heads (9012). The inner edge of the groove transition round head (9012) is tangent to the arc edge of the semicircular inner groove (9011). The outer tooth plate (106) is arranged at the groove opening of the rim tooth groove (901). The diameter of the negative wheel (9) is smaller than the diameter of the male spoke plate (101).

4. A rotary pump according to claim 1, characterized in that A positioning cam (11) is provided at the center of one side of the front cover plate (5) connected to the pump housing (1), a main shaft hole (12) is provided at the lower side of the center of the positioning cam (11), a sealing gasket (13) is provided on the surface of the front cover plate (5), the front cover plate (5) and the rear cover plate (6) have the same structure, the main shaft hole (12) on the front cover plate (5) passes through the front and rear sides of the front cover plate (5), the rear side of the main shaft hole (12) on the rear cover plate (6) is sealed by the rear cover plate (6), and the front and rear ends of the main shaft (1041) respectively pass through two female wheels. The front end of the main shaft (1041) passes through the main shaft hole (12) of the front cover plate (5) and extends to the front side of the front cover plate (5); the rear end of the main shaft (1041) is arranged in the main shaft hole (12) of the rear cover plate (6); the positioning convex shaft (11) of the front cover plate (5) is arranged in the negative wheel rotating hole (904) of the negative wheel (9) on the front side of the male wheel spoke plate (101) and is rotatably connected thereto; the positioning convex shaft (11) of the rear cover plate (6) is arranged in the negative wheel rotating hole (904) of the negative wheel (9) on the rear side of the male wheel spoke plate (101) and is rotatably connected thereto.

5. A rotary pump according to claim 1, characterized in that A right corner (14) is provided between the upper left side of the liquid inlet chamber (7) and the inner wall of the pump chamber (4), and a left corner (15) is provided between the upper right side of the liquid outlet chamber (8) and the inner wall of the pump chamber (4). The right corner (14) and the left corner (15) are both oriented downwards. A plurality of blocking grooves (16) are provided on the inner wall at the lower side of the pump chamber (4), and buffer chambers (17) are provided on the left and right sides of the inner wall at the top of the pump chamber (4).

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