31results about How to "Simple structure improvement" patented technology

A mining dump truck and its adjustable air volume ventilation and cooling system and method, the cooling system includes an upper air duct, a throttling device, a front air duct, a blower, a rear air duct, an electric control cabinet, a main generator and a rear axle housing; , the front air duct is set between the electric control cabinet and the main generator, the rear air duct is set between the blower and the rear axle housing, the main generator is connected to the blower; the upper air duct is located above the front air duct and connected to the blower, It is used to supplement a large amount of air volume; the throttling device is connected to the front air duct to supplement the air volume, and the air volume can be dynamically adjusted according to needs; the air volume flows from the upper air duct, the throttling device and the front air duct to the main generator, and then enters through the blower The rear air channel flows to the rear axle housing, and after cooling the traction motor, the heat is lost to the atmosphere. The present invention designs a ventilating and cooling system with adjustable air volume by adding an upper air channel and a throttling device, so as to solve the problem that the existing ventilating system has insufficient air intake and cannot be dynamically adjusted according to the operating environment of the mine car.

The invention discloses a DC / DC circuit, comprising a PWM controller, a current amplifier, a peak current comparator, an error amplifier, a main switch, a synchronous switch and also an operational amplifier. The non inverting input end of the operational amplifier is used for coupling with input voltage or voltage reference, or used for coupling with the input voltage and the voltage reference; the inverting input end of the operational amplifier is used for coupling with the voltage reference or ground, and the output end thereof is connected with the non inverting input end of the error amplifier. As a DC / DC basic structure is adopted, the operational amplifier leads the non inverting input end voltage of the error amplifier to follow the input voltage linearly, thus realizing the linear following relation between the output voltage and the input voltage. As the DC / DC basic structure is adopted, the circuit provided by the invention has the advantages of DC / DC to guarantee the highefficiency of the output of the voltage and great driving capacity.

The invention relates to a wood-plastic inward opening sash sectional material forming die. A mouth die a, a mouth die b, a mouth die c, a confluence plate, a support plate a, a support plate b, a transition plate, a die body and a core rod are sequentially connected from top to bottom through screws, a Z-shaped frame is arranged in a die cavity formed by the mouth die a, the mouth die b and the mouth die c, the upper end of the Z-shaped frame is divided into a plurality of sectional frames, a C-shaped clamping groove A is formed in the lower end of the sectional frame on one side, a clampinghook A is arranged on the sectional frame on the other side, a large rectangular frame is arranged in the middle of the Z-shaped frame, a clamping hook B is arranged on the frame edge of the side, close to the C-shaped clamping groove A, of the large rectangular frame, a C-shaped clamping groove B is formed in the upper end of the other side of the large rectangular frame, an inward groove is formed in the lower end of the C-shaped clamping groove B, the upper end and the lower end of the inward groove are each provided with a clamping plate, the lower end of the Z-shaped frame is divided intoa plurality of sectional frames, a C-shaped clamping groove C is formed in the outer side of the sectional frame on one side, and a C-shaped clamping groove D is formed in the corner of the upper endof the outer side of the rectangular frame on the other side. The wood-plastic inward opening sash sectional material forming die is simple and practical in structure and has good practical use value.

The invention discloses a method for controlling temperature of a photoelectric separate fiber optic gyroscope optical path, which comprises steps: a magnetic shielding outer cover (2) is arranged on an optical fiber ring skeleton (4), and forms a closed magnetic shielding space with the optical fiber ring skeleton (4), the magnetic shielding outer cover (2) uses a covered edge design, and is clung to the upper edge of the optical fiber ring skeleton (4) after being mounted, and is packed on the inner wall of the optical fiber ring skeleton (4) along the peripheral direction, electrical heating bands are pasted on the optical fiber ring skeleton (4), and heat is transmitted to the optical fiber ring skeleton (4) through the magnetic shielding outer cover (2), and is transmitted to an optical fiber ring (3) through the optical fiber ring skeleton (4), thereby enabling the optical fiber ring (3) to achieve temperature balance. The method for controlling temperature of the photoelectric separate fiber optic gyroscope optical path enables the temperature in the optical fiber ring (3) to be uniformly distributed, a gyroscope works in a sett temperature range, prevents bias drift which is produced by shupe in effect, and achieves the performance demands of high precision optical fiber gyroscope zero bias and scale factors.