# US 9,518,582 B2 · Motor spacer, motor spacer applied to variable-speed compressor and compressor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,518,582 B2 - Document ID: US9518582B2 - Status: Granted - Kind: B2 - Application number: 14/093,571 - Filed: 2013-12-02 - Published: 2014-06-05 - Granted: 2016-12-13 - Earliest claimed: 2012-12-03 - Assignees: Danfoss (Tianjin) Ltd. - Applicants: Danfoss (Tianjin) Ltd. - Inventors: Xueyou Zhou - Web page: https://patentgrep.com/patent/US9518582B2 ## CPC - F04C 23/02: Pumps characterised by combination with, or adaptation to, specific driving engines or motors - F01C 21/10: Outer members for co-operation with rotary pistons; Casings (casings for rotary engines or machines in general F16M) - F04C 23/008: {Hermetic pumps} - H02K 1/145: {having an annular coil, e.g. of the claw-pole type} - H02K 1/185: {to outer stators} - F04C 18/0215: {where only one member is moving} - F04C 2240/80: Other components - H02K 1/30: using intermediate parts, e.g. spiders - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS - F01C: ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES (internal-combustion aspects F02B53/00, F02B55/00) - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A motor spacer for a variable-speed compressor positions and supports a stator of a motor in a cylindrical section of a compressor shell. The spacer includes a ring member and a plurality of support blocks. The ring member is coaxially mounted around the stator by a clamping force. Each support block protrudes radially and outwardly from the ring member and has a hollow frame structure with a closed enclosure. Each support block has a support surface in contact with the shell. Each support surface is located on a side of an imaginary ring cylinder having a common axis with the ring member. The plurality of the support blocks are adapted to mount the motor spacer onto an inner side of the shell by a clamping force. ## Claims ### Claim 1 A motor spacer, applicable for positioning and supporting a stator of a motor in a cylindrical section of a compressor shell, wherein the motor spacer comprises: a ring member to be coaxially mounted around the stator by a first clamping force; a plurality of support blocks, wherein each support block protrudes radially and outwardly from the ring member and has a hollow frame structure with a closed enclosure, and wherein each support block has a support surface to be in contact with the shell, and wherein the support surface is located on a side of an imaginary ring cylinder having a common axis with the ring member, and wherein the plurality of the support blocks are adapted to mount the motor spacer onto an inner side of the shell by a second clamping force; and a reinforcing rib extending across said hollow frame structure of said support block, and a through hole provided at a center of each of said support blocks, and extending through said reinforcing rib. ### Claim 2 (depends on 1) The motor spacer according to claim 1, wherein the support block has at least one of a reinforced frame structure and a thickened wall. ### Claim 3 (depends on 1) The motor spacer according to claim 1, wherein the motor spacer further comprises a sign-ear connected to one side of at least one support block. ### Claim 4 (depends on 1) The motor spacer according to claim 1, wherein the motor spacer further comprises at least one threaded hole disposed on a circumference of the ring member and adapted to connect the motor spacer and the stator by screw. ### Claim 5 (depends on 4) The motor spacer according to claim 4, wherein the motor spacer further comprises a casting surface adapted to confirm an approximate vertical position of the motor spacer on the stator when assembling the stator and the motor spacer. ### Claim 6 (depends on 5) The motor spacer according to claim 5, wherein the support surface is a machined outer surface adapted to connect the motor spacer and the stator to the shell by interference fitting. ### Claim 7 (depends on 6) The motor spacer according to claim 6, wherein the motor spacer further comprises a machined inner surface used for connecting the motor spacer and the stator. ### Claim 8 (depends on 7) The motor spacer according to claim 7, wherein the motor spacer further comprises a machined chamfer disposed at an outer periphery on an inner side of the ring member and adapted to facilitate assembling the motor spacer onto the stator. ### Claim 9 (depends on 8) The motor spacer according to claim 8, wherein the motor spacer further comprises a casting slope, disposed at the center of said support blocks and in connection with the through hole, used for a casting process. ### Claim 10 (depends on 1) The motor spacer according to claim 1, wherein there are six support blocks. ### Claim 11 (depends on 1) The motor spacer according to claim 1, wherein an inner diameter of the compressor shell is larger than an outer diameter of the stator, an inner diameter of the ring member is equal to the outer diameter of the stator, and a diameter of the imaginary ring cylinder is equal to the inner diameter of the compressor shell. ### Claim 12 (depends on 1) A motor spacer applied to a variable-speed compressor, wherein the motor spacer is the motor spacer recited in claim 1. ### Claim 13 A compressor, comprising: a shell, at least one portion of which is a cylindrical portion; a substantially hermetic space defined by the shell; a motor mounted onto an inner side of the cylindrical portion of the shell, the motor comprising a stator; and a motor spacer coaxially mounted around the stator and mounted onto an inner side of the shell by a clamping force, the motor spacer including a ring member, coaxially mounted around the stator by a first clamping force; a plurality of support blocks, wherein each support block protrudes radially and outwardly from the ring member and has a hollow frame structure with a closed enclosure, and wherein each support block has a support surface in contact with the shell, and wherein the support surface is located on a side of an imaginary ring cylinder having a common axis with the ring member, and wherein the plurality of the support blocks are adapted to mount the motor spacer onto an inner side of the shell by a second clamping force; and a reinforcing rib extending across said hollow frame structure of said support block, and a through hole provided at a center of each of said support blocks, and extending through said reinforcing rib. ### Claim 14 (depends on 13) The compressor according to claim 13, wherein the support block has at least one reinforced frame structure and a thickened wall. ### Claim 15 (depends on 13) The compressor according to claim 13, wherein the motor spacer further comprises at least one threaded hole disposed on a circumference of the ring member and adapted to connect the motor spacer and the stator by screw. ### Claim 16 (depends on 13) The compressor according to claim 13, wherein the motor spacer further comprises a casting surface adapted to confirm an approximate vertical position of the motor spacer on the stator when assembling the stator and the motor spacer. ### Claim 17 (depends on 16) The compressor according to claim 16, wherein the motor spacer further comprises a machined chamfer disposed at an outer periphery on an inner side of the ring member and adapted to facilitate assembling the motor spacer onto the stator. ### Claim 18 (depends on 17) The compressor according to claim 17, wherein the motor spacer further comprises a casting slope, disposed at the center of the support block and in connection with the through hole, used for a casting process.