EP0401761A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Magnet pump
Assignee: Ebara Corp
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Filing: 1990-06-05
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Granted: —
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Expires: 2010-06-05
Abstract
Abstract A magnet pump in which an impeller (2) having a permanent magnet (2c) embedded therein is rotatably driven by a magnetic force from the outside of the impeller (2) is disclosed. The pump comprises a pump casing (1) including a suction port (1d), a discharge port (1e) and a pumping chamber (1c) in which the impeller (2) is contained. The impeller (2) is rotatably contained in the pumping chamber (1c) of the casing (1) and has the permanent magnet (2c) embedded therein. A pair of bearings (1f, 1g), one being fixed to the casing and the other being fixed to the impeller is provided. A magnetic force driving mechanism constitutes a means for affording the magnetic force on the permanent magnet (2c) within the impeller (2) to rotatably drive the latter. The magnetic force driving mechanism is mounted on a non-liquid-contacting portion of the casing (1a) at a position facing the impeller in respect to the direction of the rotary shaft axis of the impeller. A fluid inlet passage for communicating between the suction port (1d) and the pumping chamber (1) is formed to pass through the center portion of the magnetic force driving mechanism.
Inventors
- 👤 Eiji Miyamoto
- 👤 Yoshinori Ojima
- 👤 Tadashi Yakabe
- 👤 Toshiya Kanamori
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 22:38
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/046; F04D29/047; F04D13/00; F04D13/02; F04D13/021; F04D13/024; F04D13/026; F04D13/06; F04D13/0646; F04D13/0666; F04D29/0465; F04D29/0467; F04D29/049; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/043; H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/128; H02K5/1282; H02K7/00; H02K7/08; H02K7/086; H02K7/088; H02K7/10; H02K7/11
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
177 words
A magnet pump in which an impeller having a permanent magnet embedded therein is rotatably driven by a magnetic force from the outside of said impeller, said pump comprising a pump casing including a suction port, a discharge port and a pumping chamber in which the impeller is contained; the impeller being rotatably contained in said pumping chamber of said casing and having the permanent magnet embedded therein; a pair of bearings, one being fixed to said casing and the other being fixed to said impeller; a magnetic force driving mechanism constituting a means for affording the magnetic force on said permanent magnet within said impeller to rotatably drive the latter, said magnetic force driving mechanism being mounted on a non-liquid-contacting portion of said casing at a position facing said impeller in respect to the direction of the rotary shaft axis of said impeller; and a fluid inlet passage for communicating between said suction port and said pumping chamber, said fluid inlet passage being formed to pass through the center portion of said magnetic force driving mechanism.
Claim 2
Dependent Claim
177 words
A magnet pump in which an impeller having a permanent magnet embedded therein is rotatably driven by a magnetic force from the outside of said impeller, said pump comprising a pump casing including a suction port, a discharge port and a pumping chamber in which the impeller is contained; the impeller being rotatably contained in said pumping chamber of said casing and having the permanent magnet embedded therein; a pair of bearings, one being fixed to said casing and the other being fixed to said impeller; a magnetic force driving mechanism constituting a means for affording the magnetic force on said permanent magnet within said impeller to rotatably drive the latter, said magnetic force driving mechanism being mounted on a non-liquid-contacting portion of said casing at a position facing said impeller in respect to the direction of the rotary shaft axis of said impeller; and a fluid inlet passage for communicating between said suction port and said pumping chamber, said fluid inlet passage being formed to pass through the center portion of said magnetic force driving mechanism.
Claim 3
Dependent Claim
27 words
A magnet pump as set forth in Claim 1, wherein the permanent magnet embedded in said impeller is contained in a container made of an inorganic material.
Claim 4
Dependent Claim
28 words
A magnet pump as set forth either in Claim 1 or 2, wherein said inlet passage passes through the center portion of the bearing fixed to said casing.
Claim 5
Dependent Claim
39 words
A magnet pump as set forth in any one of Claims 1 to 3, wherein the material of said bearings is ceramic, and one of the bearings is formed in its sliding surface with grooves for generating dynamic pressure.
Claim 6
Dependent Claim
39 words
A magnet pump as set forth in Claim 4, wherein said ceramic includes a substrate of silicon carbide sintered material and a thin layer of silicon carbide coated on the surface of the substrate by a thermal CVD process.
Claim 7
Dependent Claim
181 words
A magnet pump in which an impeller having a permanent magnet embedded therein is rotatably driven by a magnetic force from the outside of said impeller, said pump comprising a pump casing including a suction port, a discharge port and a pumping chamber in which the impeller is contained; the impeller being rotatably contained in said pumping chamber of said casing and having the permanent magnet embedded therein; a pair of bearings, one being fixed to said casing and the other being fixed to said impeller; a magnetic force driving mechanism constituting a means for affording the magnetic force on said permanent magnet within said impeller to rotatably drive the latter, said magnetic force driving mechanism having a permanent magnet rotatably mounted on a non-liquid-contacting portion of said casing at a position facing said impeller with respect to the direction of the rotary shaft axis of said impeller; and a fluid inlet passage for communicating between said suction port and said pumping chamber, said fluid inlet passage being formed to pass through the center portion of said magnetic force driving mechanism.
Claim 8
Dependent Claim
181 words
A magnet pump in which an impeller having a permanent magnet embedded therein is rotatably driven by a magnetic force from the outside of said impeller, said pump comprising a pump casing including a suction port, a discharge port and a pumping chamber in which the impeller is contained; the impeller being rotatably contained in said pumping chamber of said casing and having the permanent magnet embedded therein; a pair of bearings, one being fixed to said casing and the other being fixed to said impeller; a magnetic force driving mechanism constituting a means for affording the magnetic force on said permanent magnet within said impeller to rotatably drive the latter, said magnetic force driving mechanism having a permanent magnet rotatably mounted on a non-liquid-contacting portion of said casing at a position facing said impeller with respect to the direction of the rotary shaft axis of said impeller; and a fluid inlet passage for communicating between said suction port and said pumping chamber, said fluid inlet passage being formed to pass through the center portion of said magnetic force driving mechanism.
Claim 9
Dependent Claim
27 words
A magnet pump as set forth in Claim 6, wherein the permanent magnet embedded in said impeller is contained in a container made of an inorganic material.
Claim 10
Dependent Claim
28 words
A magnet pump as set forth either in Claim 6 or 7, wherein said inlet passage passes through the center portion of the bearing fixed to said casing.
Claim 11
Dependent Claim
39 words
A magnet pump as set forth in any one of Claims 6 to 8, wherein the material of said bearings is ceramic, and one of the bearings is formed in its sliding surface with grooves for generating dynamic pressure.
Claim 12
Dependent Claim
39 words
A magnet pump as set forth in Claim 9, wherein said ceramic includes a substrate of silicon carbide sintered material and a thin layer of silicon carbide coated on the surface of the substrate by a thermal CVD process.
Claim 13
Dependent Claim
179 words
A magnet pump in which an impeller having a permanent magnet embedded therein is rotatably driven by a magnetic force from the outside of said impeller, said pump comprising a pump casing including a suction port, a discharge port and a pumping chamber in which the impeller is contained; the impeller being rotatably contained in said pumping chamber of said casing and having the permanent magnet embedded therein; a pair of bearings, one being fixed to said casing and the other being fixed to said impeller; a magnetic force driving mechanism constituting a means for affording the magnetic force on said permanent magnet within said impeller to rotatably drive the latter, said magnetic force driving mechanism having a stator fixed to a non-liquid-contacting portion of said casing at a position facing said impeller with respect to the direction of the rotary shaft axis of said impeller; and a fluid inlet passage for communicating between said suction port and said pumping chamber, said fluid inlet passage being formed to pass through the center portion of said magnetic force driving mechanism.
Claim 14
Dependent Claim
179 words
A magnet pump in which an impeller having a permanent magnet embedded therein is rotatably driven by a magnetic force from the outside of said impeller, said pump comprising a pump casing including a suction port, a discharge port and a pumping chamber in which the impeller is contained; the impeller being rotatably contained in said pumping chamber of said casing and having the permanent magnet embedded therein; a pair of bearings, one being fixed to said casing and the other being fixed to said impeller; a magnetic force driving mechanism constituting a means for affording the magnetic force on said permanent magnet within said impeller to rotatably drive the latter, said magnetic force driving mechanism having a stator fixed to a non-liquid-contacting portion of said casing at a position facing said impeller with respect to the direction of the rotary shaft axis of said impeller; and a fluid inlet passage for communicating between said suction port and said pumping chamber, said fluid inlet passage being formed to pass through the center portion of said magnetic force driving mechanism.
Claim 15
Dependent Claim
27 words
A magnet pump as set forth in Claim 11, wherein the permanent magnet embedded in said impeller is contained in a container made of an inorganic material.
Claim 16
Dependent Claim
28 words
A magnet pump as set forth either in Claim 11 or 12, wherein said inlet passage passes through the center portion of the bearing fixed to said casing.
Claim 17
Dependent Claim
39 words
A magnet pump as set forth in any one of Claims 11 to 13, wherein the material of said bearings is ceramic, and one of the bearings is formed in its sliding surface with grooves for generating dynamic pressure.
Claim 18
Dependent Claim
39 words
A magnet pump as set forth in Claim 14, wherein said ceramic includes a substrate of silicon carbide sintered material and a thin layer of silicon carbide coated on the surface of the substrate by a thermal CVD process.
Claim 19
Dependent Claim
213 words
A magnet pump in which an impeller having a permanent magnet embedded therein is rotatably driven by a magnetic force from the outside of said impeller, said pump comprising a pump casing including a suction port, a discharge port and a pumping chamber in which the impeller is contained; the impeller being rotatably contained in said pumping chamber of said casing and having the permanent magnet embedded therein; a pair of bearings, one being fixed to said casing and the other being fixed to said impeller; a magnetic force driving mechanism constituting a means for affording the magnetic force on said permanent magnet within said impeller to rotatably drive the latter, said magnetic force driving mechanism having a permanent magnet rotatably mounted on a non-liquid-contacting portion of said casing at a position facing said impeller with respect to the direction of the rotary shaft axis of said impeller; a stator constituting a means for transmitting rotation to said magnetic force driving mechanism, said stator being fixed to a non-liquid-contacting portion of said magnetic force driving mechanism opposite to said impeller; and a fluid inlet passage for communicating between said suction port and said pumping chamber, said fluid inlet passage being formed to pass through the center portion of said magnetic force driving mechanism.
Claim 20
Dependent Claim
213 words
A magnet pump in which an impeller having a permanent magnet embedded therein is rotatably driven by a magnetic force from the outside of said impeller, said pump comprising a pump casing including a suction port, a discharge port and a pumping chamber in which the impeller is contained; the impeller being rotatably contained in said pumping chamber of said casing and having the permanent magnet embedded therein; a pair of bearings, one being fixed to said casing and the other being fixed to said impeller; a magnetic force driving mechanism constituting a means for affording the magnetic force on said permanent magnet within said impeller to rotatably drive the latter, said magnetic force driving mechanism having a permanent magnet rotatably mounted on a non-liquid-contacting portion of said casing at a position facing said impeller with respect to the direction of the rotary shaft axis of said impeller; a stator constituting a means for transmitting rotation to said magnetic force driving mechanism, said stator being fixed to a non-liquid-contacting portion of said magnetic force driving mechanism opposite to said impeller; and a fluid inlet passage for communicating between said suction port and said pumping chamber, said fluid inlet passage being formed to pass through the center portion of said magnetic force driving mechanism.
Claim 21
Dependent Claim
27 words
A magnet pump as set forth in Claim 16, wherein the permanent magnet embedded in said impeller is contained in a container made of an inorganic material.
Claim 22
Dependent Claim
28 words
A magnet pump as set forth either in Claim 16 or 17, wherein said inlet passage passes through the center portion of the bearing fixed to said casing.
Claim 23
Dependent Claim
39 words
A magnet pump as set forth in any one of Claims 16 to 18, wherein the material of said bearings is ceramic, and one of the bearings is formed in its sliding surface with grooves for generating dynamic pressure.
Claim 24
Dependent Claim
39 words
A magnet pump as set forth in Claim 19, wherein said ceramic includes a substrate of silicon carbide sintered material and a thin layer of silicon carbide coated on the surface of the substrate by a thermal CVD process.
References Cited (Backward Citations)
No citation records indexed.
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