Pump

Abstract

A pump comprises a shell assembly and a power assembly, the power assembly comprises a rotor assembly, the rotor assembly comprises a rotor and a rotating shaft, the rotor is fixed to the rotating shaft, the shell assembly is provided with a rotor containing cavity, the rotor is located in the rotor containing cavity, and the shell assembly comprises a first bearing; the first bearing surrounds the rotating shaft, the rotating shaft is provided with a first groove, the first groove is recessed in the outer wall of the rotating shaft, at least part of the first groove is opposite to the inner wall of the first bearing, and the first groove is communicated with the rotor containing cavity. When the pump works, water and other working media in the first groove make contact with the inner wall of the bearing, heat generated by friction between the rotating shaft and the inner wall of the first bearing is transferred to the water and other working media in the first groove, and the heat transfer path for transferring the heat generated by friction between the rotating shaft and the first bearing to the water and other working media is shortened.

Description

[Technical field]

[0001] The invention relates to the field of fluid control, in particular to a pump. [Background technology]

[0002] refer to Figure 10-11 A pump for a dishwasher comprises a power assembly and a housing assembly, wherein a fixed portion of the housing assembly is sealed and fixed to a fixed portion of the power assembly, the power assembly comprises a rotor assembly, the rotor assembly comprises a motor rotor 20' and a motor shaft 21', the housing assembly comprises a motor housing 10' and a friction bearing 30', a liquid lubricating cooling chamber 11' and a bearing chamber 12' located at one end of the liquid lubricating cooling chamber 11' are defined in the motor housing 10', and the motor housing 10' has a water distribution plate flow channel 13' connecting the liquid lubricating cooling chamber 11' and the outside, The motor rotor 20' is located in the liquid lubrication cooling chamber 11', the motor shaft 21' passes through the motor rotor 20', one end of the motor shaft 21' is located in the bearing chamber 12', the friction bearing 30' is located in the bearing chamber 12' and is surrounded by the motor shaft 21', the bearing chamber 12' is provided with a bearing chamber flow channel 31' connected to the liquid lubrication cooling chamber 11', water enters the bearing chamber flow channel 31' to contact the friction bearing 30', so that the heat generated by the friction between the motor shaft 21' and the friction bearing 30' is transferred to dissipate the heat of the friction bearing 30'.

[0003] When the pump is working, friction is generated between the motor shaft 21' and the inner wall of the friction bearing 30'. The heat generated by the friction is transferred to the bearing chamber flow channel 31' through the friction bearing 30'. The heat transfer path of the heat generated by the friction needs to be further shortened. [Summary of the invention]

[0004] A pump is provided, comprising a housing assembly and a power assembly, wherein the power assembly comprises a rotor assembly, wherein the rotor assembly comprises a rotor and a rotating shaft, wherein the rotor is fixed to the rotating shaft, wherein the housing assembly comprises a rotor accommodating cavity, wherein the rotor is located in the rotor accommodating cavity, wherein the housing assembly comprises a first bearing, wherein the first bearing surrounds the rotating shaft, wherein the rotating shaft comprises a first groove, wherein the first groove is recessed in an outer wall of the rotating shaft, wherein at least a portion of the first groove is opposite to an inner wall of the first bearing, and wherein the first groove is communicated with the rotor accommodating cavity.

[0005] In such a pump, the rotating shaft has a first groove, the first groove is recessed in the outer wall of the rotating shaft, at least a portion of the first groove is opposite to the inner wall of the first bearing, and the first groove is communicated with the rotor accommodating chamber. When the pump is working, the working medium such as water in the rotor accommodating chamber enters into the first groove, the rotating shaft rotates and drives the working medium such as water in the first groove to move, at least a portion of the first groove is opposite to the inner wall of the first bearing, so that the working medium such as water in the first groove contacts the inner wall of the first bearing, and the heat generated by the friction between the rotating shaft and the inner wall of the first bearing is transferred to the working medium such as water in the first groove, thereby shortening the heat transfer path from the heat generated by the friction between the rotating shaft and the first bearing to the working medium such as water. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a cross-sectional view of the pump of the present invention;

[0007] Figure 2 yes Figure 1 A partial enlarged view of part A;

[0008] Figure 3 It is a schematic diagram of the local structure of the rotating shaft in the present invention;

[0009] Figure 4 It is a three-dimensional diagram of the water distribution tray in the present invention;

[0010] Figure 5 yes Figure 4 A partial enlarged view of part B;

[0011] Figure 6 is a stereoscopic diagram of the first bearing in the present invention;

[0012] Figure 7 is another stereoscopic view of the first bearing in the present invention;

[0013] Figure 8 is a three-dimensional diagram of a first sealing member in the present invention;

[0014] Fig. 9 is a top view of the first sealing member in the present invention;

[0015] Fig.10 It is a partial structural schematic diagram of a pump of the background technology;

[0016] Fig.11 It is another partial structural schematic diagram of a pump in the background technology.

[0017] Reference numerals:

[0018] The rotor accommodating chamber 11,

[0019] first bearing 12, fourth wall surface 121, fifth wall surface 122, first portion 123, second portion 124, fourth groove 125, fifth opening 1251, fifth groove 126, sixth groove 127, sixth opening 1271,

[0020] The water separation plate 13, the first wall portion 131, the first receiving portion 132, the first receiving cavity 1321, the third wall surface 1322, the first step portion 133, the second groove 134, the third opening 1341, the third groove 135, the fourth opening 1351,

[0021] The first seal 14, the seventh groove 141,

[0022] Upper housing 15, bearing bracket 16,

[0023] The second bearing 17, the third part 171, the fourth part 172, the second seal 18,

[0024] Rotor 211 , first injection molded part 2111 , rotating shaft 212 , first groove 2121 , first opening 2122 , second opening 2123 , first shaft portion 2124 , first wall surface 2125 , second wall surface 2126 , second shaft portion 2127 , impeller 213 , and hub 2131 . DETAILED DESCRIPTION

[0025] The technical solution of the specific implementation method is described below in conjunction with the accompanying drawings.

[0026] It should be noted that: although this specification has described the present invention in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify, combine or replace the present invention with equivalents, and all technical solutions and improvements thereto that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

[0027] refer to Figure 1 , a pump that can be applied to household appliances such as dishwashers, but not limited thereto.

[0028] refer to Figure 1The pump includes a housing assembly and a power assembly. The fixed portion of the housing assembly is sealed and fixed to the fixed portion of the power assembly. The housing assembly includes an upper housing 15, a water separation plate 13 and a bearing bracket 16. The upper housing 15 has a pump outlet pipe. The upper housing 15 and the water separation plate 13 are sealed and fixed. The bearing bracket 16 is connected to the water separation plate 13. The power assembly includes a rotor 211 assembly. The rotor 211 assembly includes a rotor 211 and a rotating shaft 212. The rotor 211 is fixed to the rotating shaft 212. The water separation plate 13 has a rotor accommodating chamber 11. The rotor 211 is located in the rotor accommodating chamber 11. The rotor 211 assembly includes an impeller 213. The impeller 213 includes a hub 2131. The hub 2131 is fixed to the rotating shaft 212. When the pump is working, the rotor 211 drives the impeller 213 to rotate through the rotating shaft 212. Working media such as water enters the upper housing 15 and then flows out from the pump outlet pipe.

[0029] refer to Figure 1 and Figure 3 The housing assembly includes a first bearing 12, the first bearing 12 surrounds a rotating shaft 212, the rotating shaft 212 has a first groove 2121, the first groove 2121 is recessed in the outer wall of the rotating shaft 212, at least part of the first groove 2121 is opposite to the inner wall of the first bearing 12, and the first groove 2121 is connected to the rotor accommodating chamber 11.

[0030] In such a pump, the rotating shaft 212 has a first groove 2121, and the first groove 2121 is recessed in the outer wall of the rotating shaft 212. At least a portion of the first groove 2121 is opposite to the inner wall of the first bearing 12. The first groove 2121 is communicated with the rotor accommodating chamber 11. When the pump is working, the working medium such as water in the rotor accommodating chamber 11 enters the first groove 2121, the rotating shaft 212 rotates and drives the working medium such as water in the first groove 2121 to move. At least a portion of the first groove 2121 is opposite to the inner wall of the first bearing 12, so that the working medium such as water in the first groove 2121 contacts the inner wall of the first bearing 12, and the heat generated by the friction between the rotating shaft 212 and the inner wall of the first bearing 12 is transferred to the working medium such as water in the first groove 2121, thereby shortening the heat transfer path of the heat generated by the friction between the rotating shaft 212 and the first bearing 12 to be transferred to the working medium such as water.

[0031] The first bearing 12 surrounds the rotating shaft 212 , and the end of the rotating shaft 212 does not extend out of the first bearing 12 or the end of the rotating shaft 212 extends out of the first bearing 12 , which will not be described in detail here.

[0032] refer to Figure 2-Figure 3The rotating shaft 212 has a first shaft portion 2124 and a second shaft portion 2127. The diameter of the first shaft portion 2124 is greater than the diameter of the second shaft portion 2127. The first shaft portion 2124 has a first wall surface 2125. The second shaft portion 2127 protrudes from the first wall surface 2125. The first bearing 12 is arranged around the first shaft portion 2124. The rotor 211 is sleeved on a part of the first shaft portion 2124. The first groove 2121 is recessed in the outer wall of the first shaft portion 2124. The first groove 2121 has a first opening 2122. The first opening 2122 is located on the first wall surface 2125.

[0033] refer to Figure 1 The rotor 211 has a first injection molded part 2111, which is integrally molded on the rotating shaft 212, and the first injection molded part 2111 covers part of the first shaft portion 2124. The first injection molded part 2111 covers the second shaft portion 2127. There is a certain distance between the rotor 211 and the first bearing 12, and part of the first groove 2121 is located between the rotor 211 and the rotating shaft 212. Working media such as water can enter the first groove 2121 from the part of the first groove 2121 located between the rotor 211 and the rotating shaft 212. Of course, the first wall 2125 can also be roughly flush with the fourth wall 121 (described below). At this time, the first injection molded part 2111 does not cover the first shaft portion 2124, and the first opening 2122 is connected to the rotor accommodating cavity 11, which will not be described here.

[0034] refer to Figure 1-Figure 2 , Figure 4-Figure 5 The housing assembly includes a water separator 13, the water separator 13 has a first wall portion 131 and a first accommodating portion 132, the first wall portion 131 protrudes from the outer peripheral wall of the first accommodating portion 132, the first accommodating portion 132 has a first accommodating cavity 1321, the first bearing 12 is located in the first accommodating cavity 1321, the water separator 13 includes a first step portion 133, the first step portion 133 protrudes from the inner peripheral wall portion of the first accommodating portion 132, the first bearing 12 includes a first portion 123 and a second portion 124, the diameter of the first portion 123 is greater than the diameter of the second portion 124, the second portion 124 protrudes from the first portion 123 away from the rotor 211, and the axes of the first portion 123 and the second portion 124 coincide, and the housing assembly includes a first seal 14, the first seal 14 is sleeved on the second portion 124, and the first seal 14 is located between the first portion 123 and the first step portion 133.

[0035] refer to Figure 5 The water distribution plate 13 has a second groove 134 and a third groove 135. The second groove 134 is recessed in the inner peripheral wall of the first accommodating portion 132, and the third groove 135 is recessed in the wall of the first step portion 133 facing the second portion 125. The third groove 135 connects the first groove 2121 and the second groove 134. There is working medium such as water on the inner and outer sides of the first bearing 12, which improves the heat dissipation efficiency of the first bearing 12.

[0036] refer to Figure 2-Figure 3 The first shaft portion 2124 has a second wall surface 2126 , and the side of the first shaft portion 2124 facing away from the rotor 211 is the second wall surface 2126 . The first slot 2121 has a second opening 2123 , and the second opening 2123 is located on the second wall surface 2126 .

[0037] refer to Figure 1-Figure 2 , Figure 3 and Figure 5 The first accommodating portion 132 has a third wall 1322, and the third wall 1322 is opposite to the rotor 211. The second groove 134 has a third opening 1341, and the third opening 1341 is located on the third wall 1322. The third opening 1341 is connected to the rotor accommodating chamber 11. The third groove 135 has a fourth opening 1351, and the fourth opening 1351 is located on the inner wall surface of the first step portion 133. The outer diameter of the second portion 125 is smaller than the inner diameter of the first step portion 133, and the fourth opening 1351 is connected to the second opening 2123.

[0038] The first groove 2121 extends in the axial direction of the rotating shaft 212. For example, the first groove 2121 is located in the half of the hollow cylinder cut along its axis, or the first groove 2121 is the half of the rectangular parallelepiped cut along its length direction. There are multiple first grooves 2121, and the multiple first grooves 2121 are arranged along the circumference of the rotating shaft 212. For example, there are 4 first grooves 2121, and the 4 first grooves 2121 are equidistantly distributed around the circumference of the rotating shaft 212. When the pump is working, due to the rotation of the rotating shaft 212, the working medium such as water in the first groove 2121 has a certain flow rate. The water pressure in the first groove 2121 is less than the water pressure in the second groove 134 and the third groove 135. The water will flow from the second groove 134 through the third groove 135 to the first groove 2121, and then flow out from the first opening 2122 to the rotor accommodating cavity 11, forming a flow path, thereby improving the heat dissipation efficiency of the first bearing 12.

[0039] refer to Figure 6-Figure 7 The first bearing 12 has a fourth groove 125 and a fifth groove 126. The fourth groove 125 is recessed in the outer peripheral wall of the first part 123. The fifth groove 126 is recessed in the wall of the first part 123 away from the rotor 211. The first bearing 12 has a sixth groove 127. The sixth groove 127 is recessed in the outer peripheral wall of the second part 124. The fifth groove 126 connects the fourth groove 125 and the sixth groove 127. The sixth groove 127 is connected to the first groove 2121. There is working medium such as water on the inner and outer sides of the first bearing 12 to improve the heat dissipation efficiency of the first bearing 12.

[0040] refer to Figure 1 , Figure 3 , Figure 6-Figure 7The first bearing 12 has a fourth wall 121, the fourth wall 121 is opposite to the rotor 21, the fourth groove 125 has a fifth opening 1251, the fifth opening 1251 is located on the fourth wall 121, and the fifth opening 1251 is connected to the rotor accommodating chamber 11, the first bearing 12 has a fifth wall 122, and the side of the first bearing 12 facing away from the rotor 211 is the fifth wall 122, the sixth groove 127 has a sixth opening 1271, the sixth opening 1271 is located on the fifth wall 122, and the sixth opening 1271 is connected to the second opening 2123.

[0041] The first groove 2121 extends in the axial direction of the rotating shaft 212. For example, the first groove 2121 is located in the half of the hollow cylinder cut along its axis, or the first groove 2121 is the half of the rectangular parallelepiped cut along its length direction. There are multiple first grooves 2121, and the multiple first grooves 2121 are arranged along the circumference of the rotating shaft 212. For example, there are 4 first grooves 2121, and the 4 first grooves 2121 are equidistantly distributed in the circumference of the rotating shaft 212. When the pump is working, As the shaft 212 rotates, the working medium such as water in the first groove 2121 has a certain flow rate, and the water pressure in the first groove 2121 is less than the water pressure in the fourth groove 125, the fifth groove 126 and the sixth groove 127. The water will flow from the fourth groove 125 through the fifth groove 126 to the sixth groove 127, and then flow to the first groove 2121, and then flow out from the first opening 2122 to the rotor accommodating cavity 11, forming a flow path, thereby improving the heat dissipation efficiency of the first bearing 12.

[0042] refer to Figure 3 The first groove 2121 is spiral-shaped, and the number of the first grooves 2121 is multiple, and the multiple first grooves 2121 are distributed circumferentially of the rotating shaft 212. When the rotating shaft 212 rotates clockwise, the first groove 2121 is right-handed; when the rotating shaft 212 rotates counterclockwise, the first groove 2121 is left-handed. When the pump is working, water or other working media flows from the first accommodating chamber 11 into the first groove 2121, and then flows into the third groove 135 or the sixth groove 127, so that water or other working media first passes through the first groove 2121 to dissipate heat to the inner wall of the first bearing 12, and then flows through the outer wall of the first bearing 12, thereby improving the heat dissipation efficiency of the first bearing 12.

[0043] Of course, the first groove 2121 may have multiple spiral turns, which will not be elaborated here.

[0044] refer to Figure 8-Figure 9The first seal 14 has a seventh groove 141. In the radial direction of the first seal 14, the seventh groove 141 is recessed outwardly in the first seal 14. In the radial direction of the first seal 14, the seventh groove 141 is opposite to the sixth groove 127. In the axial direction of the first seal 14, the seventh groove 141 is opposite to the fourth groove 125. The seventh groove 141 is opposite to the fifth groove 126. In the axial direction of the rotating shaft 212, the seventh groove 141 penetrates the first seal 14, thereby increasing the cross-sectional area for the flow of working media such as water and reducing the flow resistance.

[0045] refer to Figure 1 The bearing support 16 has a first accommodating cavity, the housing assembly includes a second bearing 17, the second bearing 17 is located in the first accommodating cavity, the second bearing 17 includes a third portion 171 and a fourth portion 172, the fourth portion 172 is away from the rotor 211 and protrudes from the third portion 171, the housing assembly includes a second seal 18, the second seal 18 is sleeved on the fourth portion 172, the second seal 18 is located in the first accommodating cavity, the rotating shaft 212 passes through the second bearing 17, the second bearing 17 and the first bearing 12 can be configured the same or substantially the same, which will not be described in detail here.

[0046] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A pump, comprising a housing assembly and a power assembly, characterized in that: The power assembly comprises a rotor (21) assembly, wherein the rotor (21) assembly comprises a rotor (21) and a rotating shaft (22), wherein the rotor (21) is fixed to the rotating shaft (22), wherein the housing assembly comprises a rotor accommodating chamber (11), wherein the rotor (21) is located in the rotor accommodating chamber (11), wherein the housing assembly comprises a first bearing (12), wherein the first bearing (12) surrounds the rotating shaft (22), wherein the rotating shaft (212) comprises a first groove (2121), wherein the first groove (2121) is recessed in an outer wall of the rotating shaft (212), wherein at least a portion of the first groove (2121) is opposite to an inner wall of the first bearing (12), and wherein the first groove (2121) is communicated with the rotor accommodating chamber (11).

2. The pump according to claim 1, characterized in that The rotating shaft (212) comprises a first shaft portion (2124) and a second shaft portion (2127), the diameter of the first shaft portion (2124) is greater than the diameter of the second shaft portion (2127), the first shaft portion (2124) comprises a first wall surface (2125), the second shaft portion (2127) protrudes from the first wall surface (2125), the first bearing (12) is arranged around the first shaft portion (2124), the rotor (211) is sleeved on a portion of the first shaft portion (2124), the first groove (2121) is recessed in an outer wall of the first shaft portion (2124), the first groove (2121) comprises a first opening (2122), and the first opening (2122) is located on the first wall surface (2125).

3. The pump according to claim 2, characterized in that The housing assembly comprises a water separation plate (13), the water separation plate (13) comprising a first wall portion (131) and a first accommodating portion (132), the first wall portion (131) protruding from an outer peripheral wall of the first accommodating portion (132), the first accommodating portion (132) comprising a first accommodating cavity (1321), the first bearing (12) being located in the first accommodating cavity (1321), the water separation plate (13) comprising a first step portion (133), the first step portion (133) protruding from an inner peripheral wall portion of the first accommodating portion (132), the first bearing (12) comprising a first portion (123) and a second portion (124), the diameter of the first portion (123) being greater than the diameter of the second portion (124), the second portion (124) protruding from the first portion (123) away from the rotor (21), and the axes of the first portion (123) and the second portion (124) being coincident; The housing assembly comprises a first sealing member (14), wherein the first sealing member (14) is sleeved on the second portion (124), and the first sealing member (14) is located between the first portion (123) and the first step portion (133).

4. The pump according to claim 3, characterized in that The first shaft portion (2124) has a second wall surface (2126), and the side surface of the first shaft portion (2124) facing away from the rotor (211) is the second wall surface (2126). The first groove (2121) has a second opening (2123), and the second opening (2123) is located on the second wall surface (2126).

5. The pump according to claim 4, characterized in that The water diversion tray (13) comprises a second groove (134) and a third groove (135); the second groove (134) is recessed in the inner peripheral wall of the first accommodating portion (132); the third groove (135) is recessed in the wall of the first step portion (133) facing the second portion (124); the third groove (135) connects the first groove (2121) and the second groove (134).

6. The pump according to claim 5, characterized in that The first accommodating portion (132) has a third wall surface (1322), and the third wall surface (1322) is opposite to the rotor (21); the second groove (134) has a third opening (1341), and the third opening (1341) is located on the third wall surface (1322). The third opening (1341) is communicated with the rotor accommodating chamber (11); the third groove (135) has a fourth opening (1351), and the fourth opening (1351) is located on the inner wall surface of the first step portion (133); the outer diameter of the second portion (124) is smaller than the inner diameter of the first step portion (133), and the fourth opening (1351) is communicated with the second opening (2123).

7. The pump according to claim 4, characterized in that The first bearing (12) has a fourth groove (125) and a fifth groove (126), the fourth groove (125) being recessed in the outer peripheral wall of the first part (123), the fifth groove (126) being recessed in the wall of the first part (123) facing away from the rotor (21), the first bearing (12) having a sixth groove (127), the sixth groove (127) being recessed in the outer peripheral wall of the second part (124), the fifth groove (126) being connected to the fourth groove (125) and the sixth groove (127), and the sixth groove (127) being connected to the first groove (2121).

8. The pump according to claim 7, characterized in that The first bearing (12) has a fourth wall surface (121), and the fourth wall surface (121) is opposite to the rotor (21); the fourth groove (125) has a fifth opening (1251), and the fifth opening (1251) is located on the fourth wall surface (121), and the fifth opening (1251) is communicated with the rotor accommodating chamber (11); the first bearing (12) has a fifth wall surface (122), and the side surface of the first bearing (12) facing away from the rotor (21) is the fifth wall surface (122); the sixth groove (127) has a sixth opening (1271), and the sixth opening (1271) is located on the fifth wall surface (122), and the sixth opening (1271) is communicated with the second opening (2123).

9. The pump according to claim 8, characterized in that The first seal (14) has a seventh groove (141). In the radial direction of the first seal (14), the seventh groove (141) is recessed outwardly in the first seal (14). In the radial direction of the first seal (14), the seventh groove (141) is opposite to the sixth groove (127). In the axial direction of the first seal (14), the seventh groove (141) is opposite to the fourth groove (125), and the seventh groove (141) is opposite to the fifth groove (126).

10. The pump according to any one of claims 5 to 9, characterized in that: The first groove (2121) is spiral-shaped, and there are a plurality of the first grooves (2121). The plurality of first grooves (2121) are distributed circumferentially of the rotating shaft (212). When the rotating shaft (212) rotates clockwise, the first groove (2121) is right-handed; when the rotating shaft (212) rotates counterclockwise, the first groove (2121) is left-handed.

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