Pressure-adjusting screw pump
A screw pump and screw technology, applied in the direction of pumps, rotary piston pumps, rotary piston machines, etc., can solve the problems of not setting pressure regulating components, affecting the normal operation of components, and affecting the normal operation of screw pumps, etc., to achieve a reasonable structure Effect
Inactive Publication Date: 2011-01-12
沈訚
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Problems solved by technology
In many simple external systems, in order to reduce costs, there is often no pressure regulating element
Therefore, when the flow rate of the pump is too large, when the external system pressure exceeds the required rated working pressure, it will affect the normal operation of the screw pump, such as affecting the normal operation of the components in the system, or overloading the motor, so that the screw pump cannot normal work
Method used
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Embodiment Construction
[0019] A pressure regulating screw pump according to the present invention, see figure 1 and figure 2 , the pressure-regulating screw pump includes a screw pump 20 and a pressure-regulating safety valve 30 . The screw pump 20 includes a pump body 1, a pump sleeve 2, a driving screw 3, a driven screw 4, a slave rod bushing 5, a bearing body 6 and a bearing 7, and the driving screw 3 connects with two driven screws through the bearing 7 in the bearing body 6. The screw rod 4 is supported in the pump sleeve 2 together, and forms a working sealing chamber with the pump sleeve 2; the pump sleeve 2 is supported in the pump body 1, and the bearing body 6 is fixed on the pump body 1 through the sealing front cover 8; the other part of the driving screw 3 One end is set on the rear cover 10 together with the driven screw 4 through the back-stop pad 9 . A pressure regulating safety valve 30 is provided on the upper side of the screw pump 20 .
[0020] image 3 It is a structural sc...
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The invention discloses a pressure-adjusting screw pump which comprises a screw pump, wherein the screw pump comprises a pump body, a pump block, a driving screw rod, driven screw rods, a driven rod lining, a bearing body and a bearing, and the driving screw rod together with the two driven screw rods is erected in the pump block by the bearing in the bearing body and forms a working seal cavity with the pump block; the pump block is supported in the pump body, and the bearing body is fixed on the pump body through a seal front cover; the other end of the driving screw rod and the driven screw rods are arranged on a back cover by a retaining pad; and the upper side of the screw pump is provided with a pressure-adjusting safety valve, the high-pressure area of the pressure-adjusting safety valve is communicated with the high-pressure area of the screw pump, and the low-pressure area of the pressure-adjusting safety valve is communicated with the low-pressure area of the screw pump. The invention has a reasonable structure, changes a constant displacement pump into a variable displacement pump, enables the pressure at the working point to be adjustable and meets the operational requirements of the external system without pressure-adjusting elements.
Description
technical field [0001] The invention relates to a screw pump, in particular to a pressure regulating screw pump. Background technique [0002] The existing screw pump is a quantitative pump, and at a certain working pressure point, there is only one corresponding flow corresponding to it, which cannot be adjusted. However, in actual work, because the designer cannot accurately calculate the resistance of the external system of the pump, it can only be roughly estimated. Generally, the working pressure of the selected pump is relatively high. In order to stabilize the system pressure at a certain working point in actual use, it is necessary to set a pressure regulating element in the external system. However, in many simple external systems, in order to reduce costs, there is often no pressure regulating element. Therefore, when the flow rate of the pump is too large, when the external system pressure exceeds the required rated working pressure, it will affect the normal op...
Claims
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IPC IPC(8): F04C2/107
Inventor 沈訚
Owner 沈訚