CN203051923U

CN203051923U - Planar double-enveloping ring surface worm drive pair of valve

Info

Publication number: CN203051923U
Application number: CN 201320039440
Authority: CN
Inventors: 金成辉; 张江波
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-01-25
Filing date: 2013-01-25
Publication date: 2013-07-10
Anticipated expiration: 2023-01-25

Abstract

The utility model provides a planar double-enveloping ring surface worm drive pair of a valve, wherein the planar double-enveloping ring surface worm drive pair of the valve is good in performance, large in bearing capacity, high in efficiency and long in service life. The technical scheme is that the planar double-enveloping ring surface worm drive pair of the valve comprises a worm wheel and a worm, wherein the worm wheel and the warm are connected in a meshed mode, the worm is provided with at least three gear teeth, worm gear teeth comprise a central gear tooth, the worm gear teeth are arranged in a mode that the central gear tooth serves as a center and as the worm gear teeth are far away from the central gear tooth, the heights of the worm gear tooth are gradually increased. An arc line formed by tooth crests of the worm gear teeth overlaps an arch line formed by tooth roots of the worm wheel worm teeth, and an arch line formed by tooth crests of the worm gear teeth, an arc line formed by tooth roots of the worm gear teeth and an arc line formed by tooth crests of the worm wheel worm teeth are all concentric circles, wherein the worm wheel serves as the center of the concentric circles.

Description

The planar double-enveloping worm transmission of valve

Technical field

The utility model relates to the transmission device of valve special use, is used for the valve bandle set of closing with opening of valves such as all kinds of large-scale, medium-sized, small-sized, high pressure of configuration, pressure, low pressure.

Background technique

The special-purpose worm gears of existing valve is to adopt common Archimedes's cylindrical worm gearing transmission, and transmission efficiency is low, and power consumption is big, and input torque is restricted, and output torque power is little, and lubricating property is poor, also has following defective simultaneously:

(1), Yin Putong Archimedes cylindrical worm worm screw in rotation number of teeth of containing worm gear has only 1(1/2) tooth, engagement has only 1 tooth, because worm transmission pair need bear big input torque, because the low broken teeth that is easy to generate of bearing capacity;

(2), worm and gear wearing and tearing are very fast, worm and wheel long-term work in use because pressure is bigger, is difficult to produce lubricant film on a face, use motorized motions, machine temperature oil temperature is too high, sealing is difficult;

(3), normal cylindrical worm gear make with processing in the flank of tooth is difficult to carry out high fine ginding, so worm tooth-surface is difficult to produce high hardness, if integral quenching, the worm screw distortion is bigger, can't guarantee worm accuracy, can produce during use and neglect indiscreet and negligent heavyly, make the worm gear discontinuity.

Summary of the invention

In order to solve the special-purpose worm gears shortcoming of above existing valve, further improve the valve dedicated transmission, the utility model provides that performance is outstanding, bearing capacity is big, efficient is high, the planar double-enveloping worm transmission of the valve of long service life.

The technological scheme of solution that the utility model provides is: the planar double-enveloping worm transmission of valve, comprise the worm gear and the worm screw that are meshed, worm screw has at least three gear teeth, described worm wheel tooth comprises central gear teeth, worm wheel tooth is centered by these central authorities' gear teeth and along with the arrangement that increases tooth depth gradually away from the central gear teeth, the camber line that the camber line that the tooth top of worm wheel tooth forms and the tooth root of worm gear wrom tooth form overlaps, the camber line that the tooth top of worm wheel tooth forms, it is the concentric circle in the center of circle that the camber line that the camber line that the tooth root of worm wheel tooth forms and the tooth top of worm gear wrom tooth form all is with the worm gear center.

The planar double-enveloping worm transmission of valve provided by the utility model, use as the transmission that is exclusively used in valve opening and closing, for multiple tooth engagement simultaneously, two-wire contact, working flank is wide, flank of tooth pressure is low, lubricating condition good, the machine temperature is low, the equivalent sweep is big, transmission efficiency is high, bearing capacity is big, the easy grinding of the flank of tooth, the flank of tooth can reach high hardness, highi degree of accuracy, transmission normal velocity light and handy, point of contact is big, contact stress is little, easily form oil film.Owing to be that instantaneous load (moment of torsion) is very big during industrial valve opening and closing, but some large-scale valves are the characteristics that low speed opens and closes once in a while throughout the year, Archimedes's worm gear transmission ratio that this structure and tradition are used, under material and measure-alike situation, bearing capacity improves 3 ~ 4 times, transmission efficiency improves more than 10%, can improve 10 times working life, when the same moment of torsion of carrying, the Worm gear case volume of the utility model structure and weight only are 1/3 of traditional Worm gear case, transmission efficiency can be increased to 45% ~ 50% from 30% ~ 35%, and more can improve 10 times working life.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Description of drawings

Fig. 1 is the planar double-enveloping worm transmission embodiment's of the utility model valve structural drawing.

Fig. 2 is the A place enlarged view of Fig. 1.

Embodiment

As shown in Figure 1, the planar double-enveloping worm transmission embodiment of valve of the present utility model, comprise casing 1, the locating flange 2 that cooperates with casing 1 and calibration flange 3, worm gear 4 and the worm screw 5 that is meshed is set in casing 1, also at locating flange 2 and calibration flange 3 locating stud 6 is set, locating stud 6 is owing to the time with after closing of valve opening is longer, be afraid of to be subjected to factor affecting such as artificial and natural, worm screw 5 is rotated, just locating stud 6 is inserted in the calibration flange 3, in case spool and flap change, to guarantee safety.During installation, transfer to locating stud 6, revolve and turn 90 degrees, nut is inserted in worm gear 4 endoporus installs, be installed in again valve rotate to flange on, on one side rotary worm 5 allow threaded stem enter in the nut, treat that two flanges cooperate to put in place, aim at mounting hole and tight a bolt and get final product.

As Fig. 1, shown in Figure 2, worm screw 3 has at least three gear teeth 8, the gear teeth 8 numbers of preferred worm screw 3 are the arbitrary numerical value between 3 to 8, particularly worm screw 3 has 7 gear teeth 8 in the present embodiment, these 7 worm wheel tooths 8 comprise central gear teeth 81, all the other gear teeth 8 of worm screw are centered by these central authorities' gear teeth 81 and along with the arrangement that increases tooth depth gradually away from the central gear teeth 81, namely be that the gear teeth 8 then have more high tooth depth more outward, the camber line that the camber line that the tooth top of worm wheel tooth 8 forms and the tooth root of worm gear 4 wrom tooths form overlaps, the camber line that the tooth top of worm wheel tooth 8 forms, it is the concentric circle in the center of circle that the camber line that the camber line that the tooth root of worm wheel tooth 8 forms and the tooth top of worm gear 4 wrom tooths form all is with worm gear 4 centers.The modulus of worm screw 5 is the arbitrary numerical value between 1 millimeter to 24 millimeters, the velocity ratio of worm screw 5 and worm gear 4 is the arbitrary numerical value between 10 to 100, and the worm screw of choosing 5, worm gear 4 parameters are more suitable for being disposed at closing and opening of valves such as all kinds of large-scale, medium-sized, small-sized, high pressure, middle pressure, low pressure as transmission device.

Claims

1. the planar double-enveloping worm transmission of a valve, comprise the worm gear (4) and the worm screw (5) that are meshed, it is characterized in that: worm screw (5) has at least three gear teeth (8), described worm wheel tooth (8) comprises central gear teeth (81), worm wheel tooth (8) is centered by these central authorities' gear teeth (81) and along with the arrangement that increases tooth depth gradually away from the central gear teeth (81), the camber line that the camber line that the tooth top of worm wheel tooth (8) forms and the tooth root of worm gear (4) wrom tooth form overlaps, the camber line that the tooth top of worm wheel tooth (8) forms, it is the concentric circle in the center of circle that the camber line that the camber line that the tooth root of worm wheel tooth (8) forms and the tooth top of worm gear (4) wrom tooth form all is with worm gear (4) center.

2. according to the planar double-enveloping worm transmission of the described valve of claim 1, it is characterized in that: the gear teeth of worm screw (8) number is the arbitrary numerical value between 3 to 8.

3. according to the planar double-enveloping worm transmission of the described valve of claim 2, it is characterized in that: worm screw has 7 gear teeth (8).

4. according to the planar double-enveloping worm transmission of claim 1 or 2 or 3 described valves, it is characterized in that: the modulus of worm screw (5) is the arbitrary numerical value between 1 millimeter to 24 millimeters, and the velocity ratio of worm screw (5) and worm gear (4) is the arbitrary numerical value between 10 to 100.