A vacuum pump comprises: a pump device configured to rotate a rotor about a rotation axis supported by a ball bearing, thereby discharging gas sucked through a pump suction port from a pump exhaust port; and a control device attached to a side surface along a direction of the rotation axis of the pump device, including an electronic circuit having a heat generation element and a housing configured to house the electronic circuit, and configured to control operation of the pump device. The heat generation element directly contacts an outer plate of the housing not contacting the pump device, and does not contact an outer plate of the housing contacting the pump device.

A drag pump for pumping gas and a set of vacuum pumps including the drag pump are disclosed. The drag pump comprises: a rotor configured to rotate within a stator component and to drive a gas to be pumped from a gas inlet to a gas outlet; magnetic bearings for rotatably mounting the rotor within the pump; wherein at least a portion of the rotor and stator component configured to contact the gas to be pumped are configured for operation at temperatures above 130 C.

The invention provides a stator-side member which is arranged in a vacuum pump and which, without the provision of a heat insulation material, prevents the deposition of products at the lower side of a threaded groove pump unit, with this lower side being an area of high pressure where the deposition of products (deposits) occurs easily, and also provides a vacuum pump equipped with this stator-side member. A threaded groove spacer configured to have a coefficient of thermal conductivity lower than a predetermined value is arranged in a vacuum pump equipped with a threaded groove pump unit. (1) The threaded groove spacer is manufactured from a material having a coefficient of thermal conductivity lower than that of a member which opposes or comes into contact with the threaded groove spacer. Specifically, this material has a coefficient of thermal conductivity lower than that of aluminum or aluminum alloy, and is preferably any one of stainless steel, fiber-reinforced plastic, polyetherimide, and polyetheretherketone. (2) The threaded groove spacer is constituted by at least two or more parts.

A retaining structure-based heat transfer and dissipation system and a wind generator set are provided. The heat transfer and dissipation system includes a envelop enclosure and power transmission cables that are laid along the vertical direction of the inner wall of the envelop enclosure. The power transmission cables are laid in a shady surface region of the envelop enclosure. The system effectively lowers the surface temperature of the power transmission cables in the envelop enclosure, prolongs the service life of the power transmission cables, and ensures the operation safety of power transmission. The over-temperature problem of the power transmission cables in a tower drum of the wind generator set in a high-temperature natural geographical environment is resolved in a green and zero-energy consumption manner, and the system safety of power transmission is improved.

A vacuum pump comprises: a rotor provided with multiple stages of rotor blades; a base including a ball bearing configured to rotatably support the rotor; an outer cylinder covering the rotor and connected to the base; and a control device including an electronic circuit having a heat generation element. The control device is provided in contact with the outer cylinder.

A vacuum pump comprises: a pump device configured to rotate a rotor about a rotation axis supported by a ball bearing, thereby discharging gas sucked through a pump suction port from a pump exhaust port; and a control device attached to a side surface along a direction of the rotation axis of the pump device, including an electronic circuit having a heat generation element and a housing configured to house the electronic circuit, and configured to control operation of the pump device. The heat generation element directly contacts an outer plate of the housing not contacting the pump device, and does not contact an outer plate of the housing contacting the pump device.

An exhaust system apparatus for an engine includes an exhaust conduit member, which is connected to the rear face of the engine body, and a heat shield member, which covers the exhaust conduit member. The heat shield member has a curved-side body portion, which covers a curved portion of the exhaust conduit member, an inner flange portion, which extends from the curved-side body portion and is arranged in the region on the inner peripheral side of the curved portion, and an outer flange portion, which extends from the curved-side body portion and is arranged in the region on the outer peripheral side of the curved portion. The extending length of the inner flange portion in a direction away from the curved-side body portion is longer than the extending length of the outer flange portion in a direction away from the curved-side body portion.

A heat dissipation retaining structure for a heat production device, an installation method thereof, and a wind turbine generator set. The heat dissipation retaining structure comprises a retaining structure body for defining a middle space, and a thermal radiation absorption coating (3), a heat insulating material, or an infrared low-emissivity and high-reflectivity material is at least partially applied to an inner wall of the retaining structure body (5). The air temperature of the environment in the retaining structure is actively decreased by the foregoing structure under the conditions that noise is avoided, environmental friendliness is achieved, external power is omitted, and energy consumption is zero, thereby decreasing the temperature of the heat production device, and ensuring that the heat production device works at the allowable normal temperature for a long time.

The invention relates to a wall ring for receiving an axial fan in particular, comprising an annular body with a central longitudinal axis, a flow inlet opening, a flow outlet opening, and an electric heating element in particular, said heating element being arranged on at least some sections of the circumference of the annular body. A profiled covering section made of a thermally insulating material is removably fixed to an outer surface of the annular body at least in some sections of the circumference, said profiled covering section together with the annular body forming a receiving area in the region of the annular wall of the annular body in order to receive the electric heating element.

A retaining structure-based heat transfer and dissipation system and a wind generator set are provided. The heat transfer and dissipation system includes a envelop enclosure and power transmission cables that are laid along the vertical direction of the inner wall of the envelop enclosure. The power transmission cables are laid in a shady surface region of the envelop enclosure. The system effectively lowers the surface temperature of the power transmission cables in the envelop enclosure, prolongs the service life of the power transmission cables, and ensures the operation safety of power transmission. The over-temperature problem of the power transmission cables in a tower drum of the wind generator set in a high-temperature natural geographical environment is resolved in a green and zero-energy consumption manner, and the system safety of power transmission is improved.