39results about How to "Avoid affecting smoothness" patented technology

The invention discloses a shell-and-tube heat exchanger. By the shell-and-tube heat exchanger, heat exchange between two types of liquid can be implemented effectively; the shell-and-tube heat exchanger has temperature difference compensation ability; and the circumstance that the heat exchanger is damaged due to over large temperature difference stress between a shell and heat exchanging tubes can be avoided. The shell-and-tube heat exchanger comprises a tube pass portion, a shell pass portion and a plurality of supports, wherein the tube pass portion comprises a tube pass inlet tube, a tube pass outlet tube and a plurality of heat exchanging tubes; the shell pass portion comprises a heat exchanger outer shell, a shell pass inlet tube and a shell pass outlet tube; the heat exchanger outer shell consists of an end socket, a shell head and a channel; a fixing tube plate is arranged between the shell head and the channel; an end socket tube plate is arranged between the end socket and the channel; the inside of the shell head is divided into a tube pass flow inlet cavity and a tube pass flow outlet cavity by a tube pass flow separating plate; and the channel is provided with an expansion joint. The shell-and-tube heat exchanger has the advantages that the position of the expansion joint easily deforms, a structural temperature difference compensating effect is achieved by the slidable end socket tube plate, and structural damage caused by over large temperature difference stress is avoided.

The invention belongs to the technical field of ceramic teeth, and relates to a high-strength and high-hardness ceramic gum base. The ceramic gum abutment comprises the following components calculated in parts by weight: 90-110 parts of zirconia powder, 60-90 parts of titanium dioxide, 20-50 parts of aluminum oxide fibers, 0.2-1.0 parts of iron oxide, dispersed 0.1-2.0 parts of the agent, 20-50 parts of photocurable resin, 0.1-0.5 part of photoinitiator, 0.1-3.0 part of adhesive, 0.5-5.0 part of coloring agent, 0.5-1.0 part of pore-forming agent, and 500 parts of solvent; The particle size of the zirconia powder is 100nm-500nm, the particle size of the titanium dioxide is 400nm-1000nm, the diameter of the aluminum oxide fiber is 50-200nm, and the length is 10μm-200μm. The high-strength and high-hardness ceramic gum abutment has a white surface, no metallic luster, no cracks on the surface during processing, long service life and good safety.

A sealing mechanism (100) for a push-pull device. The sealing device (100) comprises a first sash frame (1), a second sash frame (2), a control device (3), a first transmission device (4), a second transmission device (5), and a sealing device (6). The second sash frame (2) is horizontally disposed and two ends thereof are fixedly connected to two ends of the first sash frame (1), respectively. The control device (3) is fixedly connected to the first sash frame (1). The first transmission device (4) is provided in the first sash frame (1), and is transmittingly connected to the control device (3). The sealing device (6) is located at the bottom of the second sash frame (2). The second transmission device (5) comprises a lifting rod (51) and a plurality of springs (52). The lifting rod (51) is horizontally disposed in the second sash frame (2), the tops of both ends of the lifting rod (51) are fixedly connected to both ends of the first transmission device (4) respectively, and the bottom of the lifting rod (51) is fixedly connected to the sealing device (6). The tops of the plurality of springs (52) are all fixedly connected to the bottom of the first sash frame (1), and the bottoms of the plurality of springs (52) are all fixedly connected to the top of the lifting rod (51). The sealing mechanism (100) can be raised and lowered to fully seal the bottom of the device.

The invention discloses a heat exchanger. The heat exchanger can effectively realize the heat exchange between two fluids, and has the temperature difference compensating ability, and can prevent the damage caused by too big temperature difference stress between a shell body and a heat exchange pipe. The heat exchanger comprises a tube pass part, a shell pass part, and several brackets; the tube pass part comprises a tube pass inlet tube, a tube pass outlet tube, and a plurality of heat exchange tubes; the shell pass part includes an outer shell body of the heat exchanger, a shell pass inlet tube, and a shell pass outlet tube; the outer shell body of the heat exchanger is composed of an enclosure head, a shell head and a tube box; a fixing tube plate is arranged between the shell head and the tube box, and an enclosure head tube plate is arranged between the enclosure head and the tube box; a tube pass flow isolating plate partitions the inner part of the shell body into a tube pass inflow cavity and a tube pass outflow cavity; an expansion joint is arranged on the tube box. The heat exchanger has the following beneficial effects: through the characteristics of relatively easy deformation of the expansion joint, and cooperation of the slideable enclosure tube plate, the heat exchanger can play a role of structural temperature compensation, and avoid the structural damage caused by too big temperature difference stress.

The invention provides a retaining ring of a mandrel of a motor. The retaining ring comprises a ring body and a plurality of spacing parts, wherein an inner hole is formed in the center of the ring body; each spacing part is provided with a combing end and a clamping end; the combining end of each spacing part is connected with the wall surface of the inner hole; the clamping ends of the spacing parts stretch from the inner hole wall to the center and surround so as to form a shaft hole; and each spacing part is provided with an upper surface and a lower surface, wherein the thickness of each spacing part is the axial direction distance between the upper surface and the lower surface; and the thickness of the combing end is the biggest, the thickness of the clamping end is the smallest, and the thickness of each spacing part is gradually reduced from the combining end to the clamping end. Therefore, when the retaining ring is applied to the motor, each spacing part is not easily crack or break in the assembling process.

The invention discloses a shell-and-tube heat exchanger. By the shell-and-tube heat exchanger, heat exchange between two types of liquid can be implemented effectively; the shell-and-tube heat exchanger has temperature difference compensation ability; and the circumstance that the heat exchanger is damaged due to over large temperature difference stress between a shell and heat exchanging tubes can be avoided. The shell-and-tube heat exchanger comprises a tube pass portion, a shell pass portion and a plurality of supports, wherein the tube pass portion comprises a tube pass inlet tube, a tube pass outlet tube and a plurality of heat exchanging tubes; the shell pass portion comprises a heat exchanger outer shell, a shell pass inlet tube and a shell pass outlet tube; the heat exchanger outer shell consists of an end socket, a shell head and a channel; a fixing tube plate is arranged between the shell head and the channel; an end socket tube plate is arranged between the end socket and the channel; the inside of the shell head is divided into a tube pass flow inlet cavity and a tube pass flow outlet cavity by a tube pass flow separating plate; and the channel is provided with an expansion joint. The shell-and-tube heat exchanger has the advantages that the position of the expansion joint easily deforms, a structural temperature difference compensating effect is achieved by the slidable end socket tube plate, and structural damage caused by over large temperature difference stress is avoided.

The invention discloses a chemical engineering heat exchanger and aims to provide a heat exchanger which can effectively realize heat exchange between two liquors, has capability of temperature difference compensation and can be prevented from being damaged due to excessively large temperature difference stress between a shell and heat exchange tubes. The chemical engineering heat exchanger comprises a tube pass part, a shell pass part and a plurality of brackets, wherein the tube pass part comprises a tube pass inlet tube, a tube pass outlet tube and the plurality of heat exchange tubes; the shell pass part comprises a heat exchanger shell body, a shell pass inlet tube and a shell pass outlet tube; the heat exchanger shell body comprises a seal head, a shell head and a tube box; a fixed tube plate is arranged between the shell head and the tube box; a seal head tube plate is arranged between the seal head and the tube box; a tube pass flow baffle is used for dividing the interior of the shell head into a tube pass inflow cavity and a tube pass outflow cavity; an expansion joint is arranged on the tube box. The chemical engineering heat exchanger has the benefits that a structural temperature difference compensation effect can be achieved in combination with the slidable seal head tube plate based on a characteristic of easiness for deformation at the expansion joint, and structural damage caused by excessively large temperature difference stress is avoided.

The invention discloses a tube-shell type double-liquid heat exchange device and aims to provide a heat exchange device which can effectively achieve heat exchange between two types of liquid, has temperature difference compensation capacity and can be prevented from being damaged due to over-large temperature difference stress between a shell and a heat exchange tube. The tube-shell type double-liquid heat exchange device comprises a tube pass part, a shell pass part and a plurality of brackets, wherein the tube pass part comprises a tube pass inlet tube, a tube pass outlet tube and a plurality of heat exchange tubes; the shell pass part comprises an outer heat exchanger shell, a shell pass inlet tube and a shell pass outlet tube; the outer heat exchanger shell consists of a sealing head, a shell head and a tube box; a fixed tube plate is arranged between the shell head and the tube box; a sealing head tube plate is arranged between the sealing head and the tube box; a tube pass flow partition plate partitions the interior of the shell head into a tube pass inflow cavity and a tube pass outflow cavity; an expansion joint is arranged on the tube box. The tube-shell type double-liquid heat exchange device has the beneficial effects that according to the characteristic hat the expansion joint is relatively easy to deform, by the cooperation of the slidable sealing head tube plate, the structural temperature difference compensation effect can be achieved, and the structural damage caused by over-large temperature difference stress is avoided.

The invention discloses a heat exchanging device for chemical industry, and aims to provide a heat exchanging device which can effectively realize the heat exchange of two kinds of liquid, has the capability of compensating for temperature difference, and can prevent the damage of a shell due to the excessive differential temperature stress between the shell and a heat exchanging tube. The heat exchanging device comprises a tube pass part, a shell pass part and a plurality of supports, wherein the tube pass part comprises a tube-pass inlet tube, a tube-pass outlet tube and a plurality of heat exchanging tubes; the shell pass part comprises an outer shell of the heat exchanging device, a shell-pass inlet tube and a shell-pass outlet tube; the outer shell of the heat exchanging device consists of an end cap, a shell head and a tube box, a fixing tube plate is arranged between the shell head and the tube box, an end-cap tube plate is arranged between the end cap and the tube box, a tube-pass flow partition plate divides the inside of the shell head into a tube-pass flow inlet cavity and a tube-pass flow outlet cavity, and an expansion joint is arranged on the tube box. The heat exchanging device disclosed by the invention has the benefits that through the characteristic that the expansion joint is relatively easy to deform, the end-cap tube plate which can slide is matched, so that the heat exchanging device has a structural effect of compensating for temperature difference, and the structural damage due to the excessive differential temperature stress can be avoided.

The invention discloses a tube-shell type heat exchange device and aims to provide a heat exchange device which can effectively achieve heat exchange between two types of liquid, has temperature difference compensation capacity and can be prevented from being damaged due to over-large temperature difference stress between a shell and a heat exchange tube. The tube-shell type heat exchange device comprises a tube pass part, a shell pass part and a plurality of brackets, wherein the tube pass part comprises a tube pass inlet tube, a tube pass outlet tube and a plurality of heat exchange tubes; the shell pass part comprises an outer heat exchanger shell, a shell pass inlet tube and a shell pass outlet tube; the outer heat exchanger shell consists of a sealing head, a shell head and a tube box; a fixed tube plate is arranged between the shell head and the tube box; a sealing head tube plate is arranged between the sealing head and the tube box; a tube pass flow partition plate partitions the interior of the shell head into a tube pass inflow cavity and a tube pass outflow cavity; an expansion joint is arranged on the tube box. The tube-shell type heat exchange device has the beneficial effects that according to the characteristic hat the expansion joint is relatively easy to deform, by the cooperation of the slidable sealing head tube plate, the structural temperature difference compensation effect can be achieved, and the structural damage caused by over-large temperature difference stress is avoided.